1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- This unit contains the semantic processing for all pragmas, both language
27 -- and implementation defined. For most pragmas, the parser only does the
28 -- most basic job of checking the syntax, so Sem_Prag also contains the code
29 -- to complete the syntax checks. Certain pragmas are handled partially or
30 -- completely by the parser (see Par.Prag for further details).
32 with Atree; use Atree;
33 with Casing; use Casing;
34 with Checks; use Checks;
35 with Csets; use Csets;
36 with Debug; use Debug;
37 with Einfo; use Einfo;
38 with Elists; use Elists;
39 with Errout; use Errout;
40 with Exp_Dist; use Exp_Dist;
42 with Lib.Writ; use Lib.Writ;
43 with Lib.Xref; use Lib.Xref;
44 with Namet.Sp; use Namet.Sp;
45 with Nlists; use Nlists;
46 with Nmake; use Nmake;
48 with Output; use Output;
49 with Par_SCO; use Par_SCO;
50 with Restrict; use Restrict;
51 with Rident; use Rident;
52 with Rtsfind; use Rtsfind;
54 with Sem_Aux; use Sem_Aux;
55 with Sem_Ch3; use Sem_Ch3;
56 with Sem_Ch6; use Sem_Ch6;
57 with Sem_Ch8; use Sem_Ch8;
58 with Sem_Ch12; use Sem_Ch12;
59 with Sem_Ch13; use Sem_Ch13;
60 with Sem_Dist; use Sem_Dist;
61 with Sem_Elim; use Sem_Elim;
62 with Sem_Eval; use Sem_Eval;
63 with Sem_Intr; use Sem_Intr;
64 with Sem_Mech; use Sem_Mech;
65 with Sem_Res; use Sem_Res;
66 with Sem_Type; use Sem_Type;
67 with Sem_Util; use Sem_Util;
68 with Sem_VFpt; use Sem_VFpt;
69 with Sem_Warn; use Sem_Warn;
70 with Stand; use Stand;
71 with Sinfo; use Sinfo;
72 with Sinfo.CN; use Sinfo.CN;
73 with Sinput; use Sinput;
74 with Snames; use Snames;
75 with Stringt; use Stringt;
76 with Stylesw; use Stylesw;
78 with Targparm; use Targparm;
79 with Tbuild; use Tbuild;
81 with Uintp; use Uintp;
82 with Uname; use Uname;
83 with Urealp; use Urealp;
84 with Validsw; use Validsw;
86 package body Sem_Prag is
88 ----------------------------------------------
89 -- Common Handling of Import-Export Pragmas --
90 ----------------------------------------------
92 -- In the following section, a number of Import_xxx and Export_xxx
93 -- pragmas are defined by GNAT. These are compatible with the DEC
94 -- pragmas of the same name, and all have the following common
95 -- form and processing:
98 -- [Internal =>] LOCAL_NAME
99 -- [, [External =>] EXTERNAL_SYMBOL]
100 -- [, other optional parameters ]);
103 -- [Internal =>] LOCAL_NAME
104 -- [, [External =>] EXTERNAL_SYMBOL]
105 -- [, other optional parameters ]);
107 -- EXTERNAL_SYMBOL ::=
109 -- | static_string_EXPRESSION
111 -- The internal LOCAL_NAME designates the entity that is imported or
112 -- exported, and must refer to an entity in the current declarative
113 -- part (as required by the rules for LOCAL_NAME).
115 -- The external linker name is designated by the External parameter if
116 -- given, or the Internal parameter if not (if there is no External
117 -- parameter, the External parameter is a copy of the Internal name).
119 -- If the External parameter is given as a string, then this string is
120 -- treated as an external name (exactly as though it had been given as an
121 -- External_Name parameter for a normal Import pragma).
123 -- If the External parameter is given as an identifier (or there is no
124 -- External parameter, so that the Internal identifier is used), then
125 -- the external name is the characters of the identifier, translated
126 -- to all upper case letters for OpenVMS versions of GNAT, and to all
127 -- lower case letters for all other versions
129 -- Note: the external name specified or implied by any of these special
130 -- Import_xxx or Export_xxx pragmas override an external or link name
131 -- specified in a previous Import or Export pragma.
133 -- Note: these and all other DEC-compatible GNAT pragmas allow full use of
134 -- named notation, following the standard rules for subprogram calls, i.e.
135 -- parameters can be given in any order if named notation is used, and
136 -- positional and named notation can be mixed, subject to the rule that all
137 -- positional parameters must appear first.
139 -- Note: All these pragmas are implemented exactly following the DEC design
140 -- and implementation and are intended to be fully compatible with the use
141 -- of these pragmas in the DEC Ada compiler.
143 --------------------------------------------
144 -- Checking for Duplicated External Names --
145 --------------------------------------------
147 -- It is suspicious if two separate Export pragmas use the same external
148 -- name. The following table is used to diagnose this situation so that
149 -- an appropriate warning can be issued.
151 -- The Node_Id stored is for the N_String_Literal node created to hold
152 -- the value of the external name. The Sloc of this node is used to
153 -- cross-reference the location of the duplication.
155 package Externals is new Table.Table (
156 Table_Component_Type => Node_Id,
157 Table_Index_Type => Int,
158 Table_Low_Bound => 0,
159 Table_Initial => 100,
160 Table_Increment => 100,
161 Table_Name => "Name_Externals");
163 -------------------------------------
164 -- Local Subprograms and Variables --
165 -------------------------------------
167 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
168 -- This routine is used for possible casing adjustment of an explicit
169 -- external name supplied as a string literal (the node N), according to
170 -- the casing requirement of Opt.External_Name_Casing. If this is set to
171 -- As_Is, then the string literal is returned unchanged, but if it is set
172 -- to Uppercase or Lowercase, then a new string literal with appropriate
173 -- casing is constructed.
175 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
176 -- If Def_Id refers to a renamed subprogram, then the base subprogram (the
177 -- original one, following the renaming chain) is returned. Otherwise the
178 -- entity is returned unchanged. Should be in Einfo???
180 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
181 -- All the routines that check pragma arguments take either a pragma
182 -- argument association (in which case the expression of the argument
183 -- association is checked), or the expression directly. The function
184 -- Get_Pragma_Arg is a utility used to deal with these two cases. If Arg
185 -- is a pragma argument association node, then its expression is returned,
186 -- otherwise Arg is returned unchanged.
189 -- This is a dummy function called by the processing for pragma Reviewable.
190 -- It is there for assisting front end debugging. By placing a Reviewable
191 -- pragma in the source program, a breakpoint on rv catches this place in
192 -- the source, allowing convenient stepping to the point of interest.
194 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
195 -- Place semantic information on the argument of an Elaborate/Elaborate_All
196 -- pragma. Entity name for unit and its parents is taken from item in
197 -- previous with_clause that mentions the unit.
199 -------------------------------
200 -- Adjust_External_Name_Case --
201 -------------------------------
203 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
207 -- Adjust case of literal if required
209 if Opt.External_Name_Exp_Casing = As_Is then
213 -- Copy existing string
219 for J in 1 .. String_Length (Strval (N)) loop
220 CC := Get_String_Char (Strval (N), J);
222 if Opt.External_Name_Exp_Casing = Uppercase
223 and then CC >= Get_Char_Code ('a')
224 and then CC <= Get_Char_Code ('z')
226 Store_String_Char (CC - 32);
228 elsif Opt.External_Name_Exp_Casing = Lowercase
229 and then CC >= Get_Char_Code ('A')
230 and then CC <= Get_Char_Code ('Z')
232 Store_String_Char (CC + 32);
235 Store_String_Char (CC);
240 Make_String_Literal (Sloc (N),
241 Strval => End_String);
243 end Adjust_External_Name_Case;
245 ------------------------------
246 -- Analyze_PPC_In_Decl_Part --
247 ------------------------------
249 procedure Analyze_PPC_In_Decl_Part (N : Node_Id; S : Entity_Id) is
250 Arg1 : constant Node_Id :=
251 First (Pragma_Argument_Associations (N));
252 Arg2 : constant Node_Id := Next (Arg1);
255 -- Install formals and push subprogram spec onto scope stack so that we
256 -- can see the formals from the pragma.
261 -- Preanalyze the boolean expression, we treat this as a spec expression
262 -- (i.e. similar to a default expression).
264 Preanalyze_Spec_Expression
265 (Get_Pragma_Arg (Arg1), Standard_Boolean);
267 -- If there is a message argument, analyze it the same way
269 if Present (Arg2) then
270 Preanalyze_Spec_Expression
271 (Get_Pragma_Arg (Arg2), Standard_String);
274 -- Remove the subprogram from the scope stack now that the pre-analysis
275 -- of the precondition/postcondition is done.
278 end Analyze_PPC_In_Decl_Part;
284 procedure Analyze_Pragma (N : Node_Id) is
285 Loc : constant Source_Ptr := Sloc (N);
286 Pname : constant Name_Id := Pragma_Name (N);
289 Pragma_Exit : exception;
290 -- This exception is used to exit pragma processing completely. It is
291 -- used when an error is detected, and no further processing is
292 -- required. It is also used if an earlier error has left the tree in
293 -- a state where the pragma should not be processed.
296 -- Number of pragma argument associations
302 -- First four pragma arguments (pragma argument association nodes, or
303 -- Empty if the corresponding argument does not exist).
305 type Name_List is array (Natural range <>) of Name_Id;
306 type Args_List is array (Natural range <>) of Node_Id;
307 -- Types used for arguments to Check_Arg_Order and Gather_Associations
309 procedure Ada_2005_Pragma;
310 -- Called for pragmas defined in Ada 2005, that are not in Ada 95. In
311 -- Ada 95 mode, these are implementation defined pragmas, so should be
312 -- caught by the No_Implementation_Pragmas restriction
314 procedure Check_Ada_83_Warning;
315 -- Issues a warning message for the current pragma if operating in Ada
316 -- 83 mode (used for language pragmas that are not a standard part of
317 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
320 procedure Check_Arg_Count (Required : Nat);
321 -- Check argument count for pragma is equal to given parameter. If not,
322 -- then issue an error message and raise Pragma_Exit.
324 -- Note: all routines whose name is Check_Arg_Is_xxx take an argument
325 -- Arg which can either be a pragma argument association, in which case
326 -- the check is applied to the expression of the association or an
327 -- expression directly.
329 procedure Check_Arg_Is_External_Name (Arg : Node_Id);
330 -- Check that an argument has the right form for an EXTERNAL_NAME
331 -- parameter of an extended import/export pragma. The rule is that the
332 -- name must be an identifier or string literal (in Ada 83 mode) or a
333 -- static string expression (in Ada 95 mode).
335 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
336 -- Check the specified argument Arg to make sure that it is an
337 -- identifier. If not give error and raise Pragma_Exit.
339 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
340 -- Check the specified argument Arg to make sure that it is an integer
341 -- literal. If not give error and raise Pragma_Exit.
343 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
344 -- Check the specified argument Arg to make sure that it has the proper
345 -- syntactic form for a local name and meets the semantic requirements
346 -- for a local name. The local name is analyzed as part of the
347 -- processing for this call. In addition, the local name is required
348 -- to represent an entity at the library level.
350 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
351 -- Check the specified argument Arg to make sure that it has the proper
352 -- syntactic form for a local name and meets the semantic requirements
353 -- for a local name. The local name is analyzed as part of the
354 -- processing for this call.
356 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
357 -- Check the specified argument Arg to make sure that it is a valid
358 -- locking policy name. If not give error and raise Pragma_Exit.
360 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
361 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
362 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3, N4 : Name_Id);
363 -- Check the specified argument Arg to make sure that it is an
364 -- identifier whose name matches either N1 or N2 (or N3 if present).
365 -- If not then give error and raise Pragma_Exit.
367 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
368 -- Check the specified argument Arg to make sure that it is a valid
369 -- queuing policy name. If not give error and raise Pragma_Exit.
371 procedure Check_Arg_Is_Static_Expression
373 Typ : Entity_Id := Empty);
374 -- Check the specified argument Arg to make sure that it is a static
375 -- expression of the given type (i.e. it will be analyzed and resolved
376 -- using this type, which can be any valid argument to Resolve, e.g.
377 -- Any_Integer is OK). If not, given error and raise Pragma_Exit. If
378 -- Typ is left Empty, then any static expression is allowed.
380 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
381 -- Check the specified argument Arg to make sure that it is a valid task
382 -- dispatching policy name. If not give error and raise Pragma_Exit.
384 procedure Check_Arg_Order (Names : Name_List);
385 -- Checks for an instance of two arguments with identifiers for the
386 -- current pragma which are not in the sequence indicated by Names,
387 -- and if so, generates a fatal message about bad order of arguments.
389 procedure Check_At_Least_N_Arguments (N : Nat);
390 -- Check there are at least N arguments present
392 procedure Check_At_Most_N_Arguments (N : Nat);
393 -- Check there are no more than N arguments present
395 procedure Check_Component (Comp : Node_Id);
396 -- Examine Unchecked_Union component for correct use of per-object
397 -- constrained subtypes, and for restrictions on finalizable components.
399 procedure Check_Duplicated_Export_Name (Nam : Node_Id);
400 -- Nam is an N_String_Literal node containing the external name set by
401 -- an Import or Export pragma (or extended Import or Export pragma).
402 -- This procedure checks for possible duplications if this is the export
403 -- case, and if found, issues an appropriate error message.
405 procedure Check_First_Subtype (Arg : Node_Id);
406 -- Checks that Arg, whose expression is an entity name referencing a
407 -- subtype, does not reference a type that is not a first subtype.
409 procedure Check_In_Main_Program;
410 -- Common checks for pragmas that appear within a main program
411 -- (Priority, Main_Storage, Time_Slice, Relative_Deadline).
413 procedure Check_Interrupt_Or_Attach_Handler;
414 -- Common processing for first argument of pragma Interrupt_Handler or
415 -- pragma Attach_Handler.
417 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
418 -- Check that pragma appears in a declarative part, or in a package
419 -- specification, i.e. that it does not occur in a statement sequence
422 procedure Check_No_Identifier (Arg : Node_Id);
423 -- Checks that the given argument does not have an identifier. If
424 -- an identifier is present, then an error message is issued, and
425 -- Pragma_Exit is raised.
427 procedure Check_No_Identifiers;
428 -- Checks that none of the arguments to the pragma has an identifier.
429 -- If any argument has an identifier, then an error message is issued,
430 -- and Pragma_Exit is raised.
432 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
433 -- Checks if the given argument has an identifier, and if so, requires
434 -- it to match the given identifier name. If there is a non-matching
435 -- identifier, then an error message is given and Error_Pragmas raised.
437 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
438 -- Checks if the given argument has an identifier, and if so, requires
439 -- it to match the given identifier name. If there is a non-matching
440 -- identifier, then an error message is given and Error_Pragmas raised.
441 -- In this version of the procedure, the identifier name is given as
442 -- a string with lower case letters.
444 procedure Check_Precondition_Postcondition (In_Body : out Boolean);
445 -- Called to process a precondition or postcondition pragma. There are
448 -- The pragma appears after a subprogram spec
450 -- If the corresponding check is not enabled, the pragma is analyzed
451 -- but otherwise ignored and control returns with In_Body set False.
453 -- If the check is enabled, then the first step is to analyze the
454 -- pragma, but this is skipped if the subprogram spec appears within
455 -- a package specification (because this is the case where we delay
456 -- analysis till the end of the spec). Then (whether or not it was
457 -- analyzed), the pragma is chained to the subprogram in question
458 -- (using Spec_PPC_List and Next_Pragma) and control returns to the
459 -- caller with In_Body set False.
461 -- The pragma appears at the start of subprogram body declarations
463 -- In this case an immediate return to the caller is made with
464 -- In_Body set True, and the pragma is NOT analyzed.
466 -- In all other cases, an error message for bad placement is given
468 procedure Check_Static_Constraint (Constr : Node_Id);
469 -- Constr is a constraint from an N_Subtype_Indication node from a
470 -- component constraint in an Unchecked_Union type. This routine checks
471 -- that the constraint is static as required by the restrictions for
474 procedure Check_Valid_Configuration_Pragma;
475 -- Legality checks for placement of a configuration pragma
477 procedure Check_Valid_Library_Unit_Pragma;
478 -- Legality checks for library unit pragmas. A special case arises for
479 -- pragmas in generic instances that come from copies of the original
480 -- library unit pragmas in the generic templates. In the case of other
481 -- than library level instantiations these can appear in contexts which
482 -- would normally be invalid (they only apply to the original template
483 -- and to library level instantiations), and they are simply ignored,
484 -- which is implemented by rewriting them as null statements.
486 procedure Check_Variant (Variant : Node_Id);
487 -- Check Unchecked_Union variant for lack of nested variants and
488 -- presence of at least one component.
490 procedure Error_Pragma (Msg : String);
491 pragma No_Return (Error_Pragma);
492 -- Outputs error message for current pragma. The message contains a %
493 -- that will be replaced with the pragma name, and the flag is placed
494 -- on the pragma itself. Pragma_Exit is then raised.
496 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
497 pragma No_Return (Error_Pragma_Arg);
498 -- Outputs error message for current pragma. The message may contain
499 -- a % that will be replaced with the pragma name. The parameter Arg
500 -- may either be a pragma argument association, in which case the flag
501 -- is placed on the expression of this association, or an expression,
502 -- in which case the flag is placed directly on the expression. The
503 -- message is placed using Error_Msg_N, so the message may also contain
504 -- an & insertion character which will reference the given Arg value.
505 -- After placing the message, Pragma_Exit is raised.
507 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
508 pragma No_Return (Error_Pragma_Arg);
509 -- Similar to above form of Error_Pragma_Arg except that two messages
510 -- are provided, the second is a continuation comment starting with \.
512 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
513 pragma No_Return (Error_Pragma_Arg_Ident);
514 -- Outputs error message for current pragma. The message may contain
515 -- a % that will be replaced with the pragma name. The parameter Arg
516 -- must be a pragma argument association with a non-empty identifier
517 -- (i.e. its Chars field must be set), and the error message is placed
518 -- on the identifier. The message is placed using Error_Msg_N so
519 -- the message may also contain an & insertion character which will
520 -- reference the identifier. After placing the message, Pragma_Exit
523 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id);
524 pragma No_Return (Error_Pragma_Ref);
525 -- Outputs error message for current pragma. The message may contain
526 -- a % that will be replaced with the pragma name. The parameter Ref
527 -- must be an entity whose name can be referenced by & and sloc by #.
528 -- After placing the message, Pragma_Exit is raised.
530 function Find_Lib_Unit_Name return Entity_Id;
531 -- Used for a library unit pragma to find the entity to which the
532 -- library unit pragma applies, returns the entity found.
534 procedure Find_Program_Unit_Name (Id : Node_Id);
535 -- If the pragma is a compilation unit pragma, the id must denote the
536 -- compilation unit in the same compilation, and the pragma must appear
537 -- in the list of preceding or trailing pragmas. If it is a program
538 -- unit pragma that is not a compilation unit pragma, then the
539 -- identifier must be visible.
541 function Find_Unique_Parameterless_Procedure
543 Arg : Node_Id) return Entity_Id;
544 -- Used for a procedure pragma to find the unique parameterless
545 -- procedure identified by Name, returns it if it exists, otherwise
546 -- errors out and uses Arg as the pragma argument for the message.
548 procedure Gather_Associations
550 Args : out Args_List);
551 -- This procedure is used to gather the arguments for a pragma that
552 -- permits arbitrary ordering of parameters using the normal rules
553 -- for named and positional parameters. The Names argument is a list
554 -- of Name_Id values that corresponds to the allowed pragma argument
555 -- association identifiers in order. The result returned in Args is
556 -- a list of corresponding expressions that are the pragma arguments.
557 -- Note that this is a list of expressions, not of pragma argument
558 -- associations (Gather_Associations has completely checked all the
559 -- optional identifiers when it returns). An entry in Args is Empty
560 -- on return if the corresponding argument is not present.
562 procedure GNAT_Pragma;
563 -- Called for all GNAT defined pragmas to check the relevant restriction
564 -- (No_Implementation_Pragmas).
566 function Is_Before_First_Decl
567 (Pragma_Node : Node_Id;
568 Decls : List_Id) return Boolean;
569 -- Return True if Pragma_Node is before the first declarative item in
570 -- Decls where Decls is the list of declarative items.
572 function Is_Configuration_Pragma return Boolean;
573 -- Determines if the placement of the current pragma is appropriate
574 -- for a configuration pragma.
576 function Is_In_Context_Clause return Boolean;
577 -- Returns True if pragma appears within the context clause of a unit,
578 -- and False for any other placement (does not generate any messages).
580 function Is_Static_String_Expression (Arg : Node_Id) return Boolean;
581 -- Analyzes the argument, and determines if it is a static string
582 -- expression, returns True if so, False if non-static or not String.
584 procedure Pragma_Misplaced;
585 pragma No_Return (Pragma_Misplaced);
586 -- Issue fatal error message for misplaced pragma
588 procedure Process_Atomic_Shared_Volatile;
589 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
590 -- Shared is an obsolete Ada 83 pragma, treated as being identical
591 -- in effect to pragma Atomic.
593 procedure Process_Compile_Time_Warning_Or_Error;
594 -- Common processing for Compile_Time_Error and Compile_Time_Warning
596 procedure Process_Convention
597 (C : out Convention_Id;
598 Ent : out Entity_Id);
599 -- Common processing for Convention, Interface, Import and Export.
600 -- Checks first two arguments of pragma, and sets the appropriate
601 -- convention value in the specified entity or entities. On return
602 -- C is the convention, Ent is the referenced entity.
604 procedure Process_Extended_Import_Export_Exception_Pragma
605 (Arg_Internal : Node_Id;
606 Arg_External : Node_Id;
609 -- Common processing for the pragmas Import/Export_Exception. The three
610 -- arguments correspond to the three named parameters of the pragma. An
611 -- argument is empty if the corresponding parameter is not present in
614 procedure Process_Extended_Import_Export_Object_Pragma
615 (Arg_Internal : Node_Id;
616 Arg_External : Node_Id;
618 -- Common processing for the pragmas Import/Export_Object. The three
619 -- arguments correspond to the three named parameters of the pragmas. An
620 -- argument is empty if the corresponding parameter is not present in
623 procedure Process_Extended_Import_Export_Internal_Arg
624 (Arg_Internal : Node_Id := Empty);
625 -- Common processing for all extended Import and Export pragmas. The
626 -- argument is the pragma parameter for the Internal argument. If
627 -- Arg_Internal is empty or inappropriate, an error message is posted.
628 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
629 -- set to identify the referenced entity.
631 procedure Process_Extended_Import_Export_Subprogram_Pragma
632 (Arg_Internal : Node_Id;
633 Arg_External : Node_Id;
634 Arg_Parameter_Types : Node_Id;
635 Arg_Result_Type : Node_Id := Empty;
636 Arg_Mechanism : Node_Id;
637 Arg_Result_Mechanism : Node_Id := Empty;
638 Arg_First_Optional_Parameter : Node_Id := Empty);
639 -- Common processing for all extended Import and Export pragmas applying
640 -- to subprograms. The caller omits any arguments that do not apply to
641 -- the pragma in question (for example, Arg_Result_Type can be non-Empty
642 -- only in the Import_Function and Export_Function cases). The argument
643 -- names correspond to the allowed pragma association identifiers.
645 procedure Process_Generic_List;
646 -- Common processing for Share_Generic and Inline_Generic
648 procedure Process_Import_Or_Interface;
649 -- Common processing for Import of Interface
651 procedure Process_Inline (Active : Boolean);
652 -- Common processing for Inline and Inline_Always. The parameter
653 -- indicates if the inline pragma is active, i.e. if it should actually
654 -- cause inlining to occur.
656 procedure Process_Interface_Name
657 (Subprogram_Def : Entity_Id;
660 -- Given the last two arguments of pragma Import, pragma Export, or
661 -- pragma Interface_Name, performs validity checks and sets the
662 -- Interface_Name field of the given subprogram entity to the
663 -- appropriate external or link name, depending on the arguments given.
664 -- Ext_Arg is always present, but Link_Arg may be missing. Note that
665 -- Ext_Arg may represent the Link_Name if Link_Arg is missing, and
666 -- appropriate named notation is used for Ext_Arg. If neither Ext_Arg
667 -- nor Link_Arg is present, the interface name is set to the default
668 -- from the subprogram name.
670 procedure Process_Interrupt_Or_Attach_Handler;
671 -- Common processing for Interrupt and Attach_Handler pragmas
673 procedure Process_Restrictions_Or_Restriction_Warnings (Warn : Boolean);
674 -- Common processing for Restrictions and Restriction_Warnings pragmas.
675 -- Warn is True for Restriction_Warnings, or for Restrictions if the
676 -- flag Treat_Restrictions_As_Warnings is set, and False if this flag
677 -- is not set in the Restrictions case.
679 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
680 -- Common processing for Suppress and Unsuppress. The boolean parameter
681 -- Suppress_Case is True for the Suppress case, and False for the
684 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
685 -- This procedure sets the Is_Exported flag for the given entity,
686 -- checking that the entity was not previously imported. Arg is
687 -- the argument that specified the entity. A check is also made
688 -- for exporting inappropriate entities.
690 procedure Set_Extended_Import_Export_External_Name
691 (Internal_Ent : Entity_Id;
692 Arg_External : Node_Id);
693 -- Common processing for all extended import export pragmas. The first
694 -- argument, Internal_Ent, is the internal entity, which has already
695 -- been checked for validity by the caller. Arg_External is from the
696 -- Import or Export pragma, and may be null if no External parameter
697 -- was present. If Arg_External is present and is a non-null string
698 -- (a null string is treated as the default), then the Interface_Name
699 -- field of Internal_Ent is set appropriately.
701 procedure Set_Imported (E : Entity_Id);
702 -- This procedure sets the Is_Imported flag for the given entity,
703 -- checking that it is not previously exported or imported.
705 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
706 -- Mech is a parameter passing mechanism (see Import_Function syntax
707 -- for MECHANISM_NAME). This routine checks that the mechanism argument
708 -- has the right form, and if not issues an error message. If the
709 -- argument has the right form then the Mechanism field of Ent is
710 -- set appropriately.
712 procedure Set_Ravenscar_Profile (N : Node_Id);
713 -- Activate the set of configuration pragmas and restrictions that make
714 -- up the Ravenscar Profile. N is the corresponding pragma node, which
715 -- is used for error messages on any constructs that violate the
718 ---------------------
719 -- Ada_2005_Pragma --
720 ---------------------
722 procedure Ada_2005_Pragma is
724 if Ada_Version <= Ada_95 then
725 Check_Restriction (No_Implementation_Pragmas, N);
729 --------------------------
730 -- Check_Ada_83_Warning --
731 --------------------------
733 procedure Check_Ada_83_Warning is
735 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
736 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
738 end Check_Ada_83_Warning;
740 ---------------------
741 -- Check_Arg_Count --
742 ---------------------
744 procedure Check_Arg_Count (Required : Nat) is
746 if Arg_Count /= Required then
747 Error_Pragma ("wrong number of arguments for pragma%");
751 --------------------------------
752 -- Check_Arg_Is_External_Name --
753 --------------------------------
755 procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
756 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
759 if Nkind (Argx) = N_Identifier then
763 Analyze_And_Resolve (Argx, Standard_String);
765 if Is_OK_Static_Expression (Argx) then
768 elsif Etype (Argx) = Any_Type then
771 -- An interesting special case, if we have a string literal and
772 -- we are in Ada 83 mode, then we allow it even though it will
773 -- not be flagged as static. This allows expected Ada 83 mode
774 -- use of external names which are string literals, even though
775 -- technically these are not static in Ada 83.
777 elsif Ada_Version = Ada_83
778 and then Nkind (Argx) = N_String_Literal
782 -- Static expression that raises Constraint_Error. This has
783 -- already been flagged, so just exit from pragma processing.
785 elsif Is_Static_Expression (Argx) then
788 -- Here we have a real error (non-static expression)
791 Error_Msg_Name_1 := Pname;
793 ("argument for pragma% must be a identifier or " &
794 "static string expression!", Argx);
798 end Check_Arg_Is_External_Name;
800 -----------------------------
801 -- Check_Arg_Is_Identifier --
802 -----------------------------
804 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
805 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
807 if Nkind (Argx) /= N_Identifier then
809 ("argument for pragma% must be identifier", Argx);
811 end Check_Arg_Is_Identifier;
813 ----------------------------------
814 -- Check_Arg_Is_Integer_Literal --
815 ----------------------------------
817 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
818 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
820 if Nkind (Argx) /= N_Integer_Literal then
822 ("argument for pragma% must be integer literal", Argx);
824 end Check_Arg_Is_Integer_Literal;
826 -------------------------------------------
827 -- Check_Arg_Is_Library_Level_Local_Name --
828 -------------------------------------------
832 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
833 -- | library_unit_NAME
835 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
837 Check_Arg_Is_Local_Name (Arg);
839 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
840 and then Comes_From_Source (N)
843 ("argument for pragma% must be library level entity", Arg);
845 end Check_Arg_Is_Library_Level_Local_Name;
847 -----------------------------
848 -- Check_Arg_Is_Local_Name --
849 -----------------------------
853 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
854 -- | library_unit_NAME
856 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
857 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
862 if Nkind (Argx) not in N_Direct_Name
863 and then (Nkind (Argx) /= N_Attribute_Reference
864 or else Present (Expressions (Argx))
865 or else Nkind (Prefix (Argx)) /= N_Identifier)
866 and then (not Is_Entity_Name (Argx)
867 or else not Is_Compilation_Unit (Entity (Argx)))
869 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
872 if Is_Entity_Name (Argx)
873 and then Scope (Entity (Argx)) /= Current_Scope
876 ("pragma% argument must be in same declarative part", Arg);
878 end Check_Arg_Is_Local_Name;
880 ---------------------------------
881 -- Check_Arg_Is_Locking_Policy --
882 ---------------------------------
884 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
885 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
888 Check_Arg_Is_Identifier (Argx);
890 if not Is_Locking_Policy_Name (Chars (Argx)) then
892 ("& is not a valid locking policy name", Argx);
894 end Check_Arg_Is_Locking_Policy;
896 -------------------------
897 -- Check_Arg_Is_One_Of --
898 -------------------------
900 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
901 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
904 Check_Arg_Is_Identifier (Argx);
906 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
907 Error_Msg_Name_2 := N1;
908 Error_Msg_Name_3 := N2;
909 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
911 end Check_Arg_Is_One_Of;
913 procedure Check_Arg_Is_One_Of
915 N1, N2, N3 : Name_Id)
917 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
920 Check_Arg_Is_Identifier (Argx);
922 if Chars (Argx) /= N1
923 and then Chars (Argx) /= N2
924 and then Chars (Argx) /= N3
926 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
928 end Check_Arg_Is_One_Of;
930 procedure Check_Arg_Is_One_Of
932 N1, N2, N3, N4 : Name_Id)
934 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
937 Check_Arg_Is_Identifier (Argx);
939 if Chars (Argx) /= N1
940 and then Chars (Argx) /= N2
941 and then Chars (Argx) /= N3
942 and then Chars (Argx) /= N4
944 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
946 end Check_Arg_Is_One_Of;
948 ---------------------------------
949 -- Check_Arg_Is_Queuing_Policy --
950 ---------------------------------
952 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
953 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
956 Check_Arg_Is_Identifier (Argx);
958 if not Is_Queuing_Policy_Name (Chars (Argx)) then
960 ("& is not a valid queuing policy name", Argx);
962 end Check_Arg_Is_Queuing_Policy;
964 ------------------------------------
965 -- Check_Arg_Is_Static_Expression --
966 ------------------------------------
968 procedure Check_Arg_Is_Static_Expression
970 Typ : Entity_Id := Empty)
972 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
975 if Present (Typ) then
976 Analyze_And_Resolve (Argx, Typ);
978 Analyze_And_Resolve (Argx);
981 if Is_OK_Static_Expression (Argx) then
984 elsif Etype (Argx) = Any_Type then
987 -- An interesting special case, if we have a string literal and we
988 -- are in Ada 83 mode, then we allow it even though it will not be
989 -- flagged as static. This allows the use of Ada 95 pragmas like
990 -- Import in Ada 83 mode. They will of course be flagged with
991 -- warnings as usual, but will not cause errors.
993 elsif Ada_Version = Ada_83
994 and then Nkind (Argx) = N_String_Literal
998 -- Static expression that raises Constraint_Error. This has already
999 -- been flagged, so just exit from pragma processing.
1001 elsif Is_Static_Expression (Argx) then
1004 -- Finally, we have a real error
1007 Error_Msg_Name_1 := Pname;
1008 Flag_Non_Static_Expr
1009 ("argument for pragma% must be a static expression!", Argx);
1012 end Check_Arg_Is_Static_Expression;
1014 ------------------------------------------
1015 -- Check_Arg_Is_Task_Dispatching_Policy --
1016 ------------------------------------------
1018 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
1019 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1022 Check_Arg_Is_Identifier (Argx);
1024 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
1026 ("& is not a valid task dispatching policy name", Argx);
1028 end Check_Arg_Is_Task_Dispatching_Policy;
1030 ---------------------
1031 -- Check_Arg_Order --
1032 ---------------------
1034 procedure Check_Arg_Order (Names : Name_List) is
1037 Highest_So_Far : Natural := 0;
1038 -- Highest index in Names seen do far
1042 for J in 1 .. Arg_Count loop
1043 if Chars (Arg) /= No_Name then
1044 for K in Names'Range loop
1045 if Chars (Arg) = Names (K) then
1046 if K < Highest_So_Far then
1047 Error_Msg_Name_1 := Pname;
1049 ("parameters out of order for pragma%", Arg);
1050 Error_Msg_Name_1 := Names (K);
1051 Error_Msg_Name_2 := Names (Highest_So_Far);
1052 Error_Msg_N ("\% must appear before %", Arg);
1056 Highest_So_Far := K;
1064 end Check_Arg_Order;
1066 --------------------------------
1067 -- Check_At_Least_N_Arguments --
1068 --------------------------------
1070 procedure Check_At_Least_N_Arguments (N : Nat) is
1072 if Arg_Count < N then
1073 Error_Pragma ("too few arguments for pragma%");
1075 end Check_At_Least_N_Arguments;
1077 -------------------------------
1078 -- Check_At_Most_N_Arguments --
1079 -------------------------------
1081 procedure Check_At_Most_N_Arguments (N : Nat) is
1084 if Arg_Count > N then
1086 for J in 1 .. N loop
1088 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
1091 end Check_At_Most_N_Arguments;
1093 ---------------------
1094 -- Check_Component --
1095 ---------------------
1097 procedure Check_Component (Comp : Node_Id) is
1099 if Nkind (Comp) = N_Component_Declaration then
1101 Sindic : constant Node_Id :=
1102 Subtype_Indication (Component_Definition (Comp));
1103 Typ : constant Entity_Id :=
1104 Etype (Defining_Identifier (Comp));
1106 if Nkind (Sindic) = N_Subtype_Indication then
1108 -- Ada 2005 (AI-216): If a component subtype is subject to
1109 -- a per-object constraint, then the component type shall
1110 -- be an Unchecked_Union.
1112 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
1114 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
1116 Error_Msg_N ("component subtype subject to per-object" &
1117 " constraint must be an Unchecked_Union", Comp);
1121 if Is_Controlled (Typ) then
1123 ("component of unchecked union cannot be controlled", Comp);
1125 elsif Has_Task (Typ) then
1127 ("component of unchecked union cannot have tasks", Comp);
1131 end Check_Component;
1133 ----------------------------------
1134 -- Check_Duplicated_Export_Name --
1135 ----------------------------------
1137 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
1138 String_Val : constant String_Id := Strval (Nam);
1141 -- We are only interested in the export case, and in the case of
1142 -- generics, it is the instance, not the template, that is the
1143 -- problem (the template will generate a warning in any case).
1145 if not Inside_A_Generic
1146 and then (Prag_Id = Pragma_Export
1148 Prag_Id = Pragma_Export_Procedure
1150 Prag_Id = Pragma_Export_Valued_Procedure
1152 Prag_Id = Pragma_Export_Function)
1154 for J in Externals.First .. Externals.Last loop
1155 if String_Equal (String_Val, Strval (Externals.Table (J))) then
1156 Error_Msg_Sloc := Sloc (Externals.Table (J));
1157 Error_Msg_N ("external name duplicates name given#", Nam);
1162 Externals.Append (Nam);
1164 end Check_Duplicated_Export_Name;
1166 -------------------------
1167 -- Check_First_Subtype --
1168 -------------------------
1170 procedure Check_First_Subtype (Arg : Node_Id) is
1171 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1173 if not Is_First_Subtype (Entity (Argx)) then
1175 ("pragma% cannot apply to subtype", Argx);
1177 end Check_First_Subtype;
1179 ---------------------------
1180 -- Check_In_Main_Program --
1181 ---------------------------
1183 procedure Check_In_Main_Program is
1184 P : constant Node_Id := Parent (N);
1187 -- Must be at in subprogram body
1189 if Nkind (P) /= N_Subprogram_Body then
1190 Error_Pragma ("% pragma allowed only in subprogram");
1192 -- Otherwise warn if obviously not main program
1194 elsif Present (Parameter_Specifications (Specification (P)))
1195 or else not Is_Compilation_Unit (Defining_Entity (P))
1197 Error_Msg_Name_1 := Pname;
1199 ("?pragma% is only effective in main program", N);
1201 end Check_In_Main_Program;
1203 ---------------------------------------
1204 -- Check_Interrupt_Or_Attach_Handler --
1205 ---------------------------------------
1207 procedure Check_Interrupt_Or_Attach_Handler is
1208 Arg1_X : constant Node_Id := Expression (Arg1);
1209 Handler_Proc, Proc_Scope : Entity_Id;
1214 if Prag_Id = Pragma_Interrupt_Handler then
1215 Check_Restriction (No_Dynamic_Attachment, N);
1218 Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
1219 Proc_Scope := Scope (Handler_Proc);
1221 -- On AAMP only, a pragma Interrupt_Handler is supported for
1222 -- nonprotected parameterless procedures.
1224 if not AAMP_On_Target
1225 or else Prag_Id = Pragma_Attach_Handler
1227 if Ekind (Proc_Scope) /= E_Protected_Type then
1229 ("argument of pragma% must be protected procedure", Arg1);
1232 if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
1233 Error_Pragma ("pragma% must be in protected definition");
1237 if not Is_Library_Level_Entity (Proc_Scope)
1238 or else (AAMP_On_Target
1239 and then not Is_Library_Level_Entity (Handler_Proc))
1242 ("argument for pragma% must be library level entity", Arg1);
1244 end Check_Interrupt_Or_Attach_Handler;
1246 -------------------------------------------
1247 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1248 -------------------------------------------
1250 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1259 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1262 elsif Nkind_In (P, N_Package_Specification,
1267 -- Note: the following tests seem a little peculiar, because
1268 -- they test for bodies, but if we were in the statement part
1269 -- of the body, we would already have hit the handled statement
1270 -- sequence, so the only way we get here is by being in the
1271 -- declarative part of the body.
1273 elsif Nkind_In (P, N_Subprogram_Body,
1284 Error_Pragma ("pragma% is not in declarative part or package spec");
1285 end Check_Is_In_Decl_Part_Or_Package_Spec;
1287 -------------------------
1288 -- Check_No_Identifier --
1289 -------------------------
1291 procedure Check_No_Identifier (Arg : Node_Id) is
1293 if Chars (Arg) /= No_Name then
1294 Error_Pragma_Arg_Ident
1295 ("pragma% does not permit identifier& here", Arg);
1297 end Check_No_Identifier;
1299 --------------------------
1300 -- Check_No_Identifiers --
1301 --------------------------
1303 procedure Check_No_Identifiers is
1306 if Arg_Count > 0 then
1308 while Present (Arg_Node) loop
1309 Check_No_Identifier (Arg_Node);
1313 end Check_No_Identifiers;
1315 -------------------------------
1316 -- Check_Optional_Identifier --
1317 -------------------------------
1319 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1321 if Present (Arg) and then Chars (Arg) /= No_Name then
1322 if Chars (Arg) /= Id then
1323 Error_Msg_Name_1 := Pname;
1324 Error_Msg_Name_2 := Id;
1325 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1329 end Check_Optional_Identifier;
1331 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1333 Name_Buffer (1 .. Id'Length) := Id;
1334 Name_Len := Id'Length;
1335 Check_Optional_Identifier (Arg, Name_Find);
1336 end Check_Optional_Identifier;
1338 --------------------------------------
1339 -- Check_Precondition_Postcondition --
1340 --------------------------------------
1342 procedure Check_Precondition_Postcondition (In_Body : out Boolean) is
1346 procedure Chain_PPC (PO : Node_Id);
1347 -- If PO is a subprogram declaration node (or a generic subprogram
1348 -- declaration node), then the precondition/postcondition applies
1349 -- to this subprogram and the processing for the pragma is completed.
1350 -- Otherwise the pragma is misplaced.
1356 procedure Chain_PPC (PO : Node_Id) is
1360 if not Nkind_In (PO, N_Subprogram_Declaration,
1361 N_Generic_Subprogram_Declaration)
1366 -- Here if we have subprogram or generic subprogram declaration
1368 S := Defining_Unit_Name (Specification (PO));
1370 -- Analyze the pragma unless it appears within a package spec,
1371 -- which is the case where we delay the analysis of the PPC until
1372 -- the end of the package declarations (for details, see
1373 -- Analyze_Package_Specification.Analyze_PPCs).
1375 if not Is_Package_Or_Generic_Package (Scope (S)) then
1376 Analyze_PPC_In_Decl_Part (N, S);
1379 -- Chain spec PPC pragma to list for subprogram
1381 Set_Next_Pragma (N, Spec_PPC_List (S));
1382 Set_Spec_PPC_List (S, N);
1384 -- Return indicating spec case
1390 -- Start of processing for Check_Precondition_Postcondition
1393 if not Is_List_Member (N) then
1397 -- Record if pragma is enabled
1399 if Check_Enabled (Pname) then
1400 Set_Pragma_Enabled (N);
1401 Set_SCO_Pragma_Enabled (Loc);
1404 -- If we are within an inlined body, the legality of the pragma
1405 -- has been checked already.
1407 if In_Inlined_Body then
1412 -- Search prior declarations
1415 while Present (Prev (P)) loop
1418 -- If the previous node is a generic subprogram, do not go to to
1419 -- the original node, which is the unanalyzed tree: we need to
1420 -- attach the pre/postconditions to the analyzed version at this
1421 -- point. They get propagated to the original tree when analyzing
1422 -- the corresponding body.
1424 if Nkind (P) not in N_Generic_Declaration then
1425 PO := Original_Node (P);
1430 -- Skip past prior pragma
1432 if Nkind (PO) = N_Pragma then
1435 -- Skip stuff not coming from source
1437 elsif not Comes_From_Source (PO) then
1440 -- Only remaining possibility is subprogram declaration
1448 -- If we fall through loop, pragma is at start of list, so see if it
1449 -- is at the start of declarations of a subprogram body.
1451 if Nkind (Parent (N)) = N_Subprogram_Body
1452 and then List_Containing (N) = Declarations (Parent (N))
1454 if Operating_Mode /= Generate_Code
1455 or else Inside_A_Generic
1458 -- Analyze expression in pragma, for correctness
1459 -- and for ASIS use.
1461 Preanalyze_Spec_Expression
1462 (Get_Pragma_Arg (Arg1), Standard_Boolean);
1468 -- See if it is in the pragmas after a library level subprogram
1470 elsif Nkind (Parent (N)) = N_Compilation_Unit_Aux then
1471 Chain_PPC (Unit (Parent (Parent (N))));
1475 -- If we fall through, pragma was misplaced
1478 end Check_Precondition_Postcondition;
1480 -----------------------------
1481 -- Check_Static_Constraint --
1482 -----------------------------
1484 -- Note: for convenience in writing this procedure, in addition to
1485 -- the officially (i.e. by spec) allowed argument which is always a
1486 -- constraint, it also allows ranges and discriminant associations.
1487 -- Above is not clear ???
1489 procedure Check_Static_Constraint (Constr : Node_Id) is
1491 procedure Require_Static (E : Node_Id);
1492 -- Require given expression to be static expression
1494 --------------------
1495 -- Require_Static --
1496 --------------------
1498 procedure Require_Static (E : Node_Id) is
1500 if not Is_OK_Static_Expression (E) then
1501 Flag_Non_Static_Expr
1502 ("non-static constraint not allowed in Unchecked_Union!", E);
1507 -- Start of processing for Check_Static_Constraint
1510 case Nkind (Constr) is
1511 when N_Discriminant_Association =>
1512 Require_Static (Expression (Constr));
1515 Require_Static (Low_Bound (Constr));
1516 Require_Static (High_Bound (Constr));
1518 when N_Attribute_Reference =>
1519 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1520 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1522 when N_Range_Constraint =>
1523 Check_Static_Constraint (Range_Expression (Constr));
1525 when N_Index_Or_Discriminant_Constraint =>
1529 IDC := First (Constraints (Constr));
1530 while Present (IDC) loop
1531 Check_Static_Constraint (IDC);
1539 end Check_Static_Constraint;
1541 --------------------------------------
1542 -- Check_Valid_Configuration_Pragma --
1543 --------------------------------------
1545 -- A configuration pragma must appear in the context clause of a
1546 -- compilation unit, and only other pragmas may precede it. Note that
1547 -- the test also allows use in a configuration pragma file.
1549 procedure Check_Valid_Configuration_Pragma is
1551 if not Is_Configuration_Pragma then
1552 Error_Pragma ("incorrect placement for configuration pragma%");
1554 end Check_Valid_Configuration_Pragma;
1556 -------------------------------------
1557 -- Check_Valid_Library_Unit_Pragma --
1558 -------------------------------------
1560 procedure Check_Valid_Library_Unit_Pragma is
1562 Parent_Node : Node_Id;
1563 Unit_Name : Entity_Id;
1564 Unit_Kind : Node_Kind;
1565 Unit_Node : Node_Id;
1566 Sindex : Source_File_Index;
1569 if not Is_List_Member (N) then
1573 Plist := List_Containing (N);
1574 Parent_Node := Parent (Plist);
1576 if Parent_Node = Empty then
1579 -- Case of pragma appearing after a compilation unit. In this case
1580 -- it must have an argument with the corresponding name and must
1581 -- be part of the following pragmas of its parent.
1583 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1584 if Plist /= Pragmas_After (Parent_Node) then
1587 elsif Arg_Count = 0 then
1589 ("argument required if outside compilation unit");
1592 Check_No_Identifiers;
1593 Check_Arg_Count (1);
1594 Unit_Node := Unit (Parent (Parent_Node));
1595 Unit_Kind := Nkind (Unit_Node);
1597 Analyze (Expression (Arg1));
1599 if Unit_Kind = N_Generic_Subprogram_Declaration
1600 or else Unit_Kind = N_Subprogram_Declaration
1602 Unit_Name := Defining_Entity (Unit_Node);
1604 elsif Unit_Kind in N_Generic_Instantiation then
1605 Unit_Name := Defining_Entity (Unit_Node);
1608 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1611 if Chars (Unit_Name) /=
1612 Chars (Entity (Expression (Arg1)))
1615 ("pragma% argument is not current unit name", Arg1);
1618 if Ekind (Unit_Name) = E_Package
1619 and then Present (Renamed_Entity (Unit_Name))
1621 Error_Pragma ("pragma% not allowed for renamed package");
1625 -- Pragma appears other than after a compilation unit
1628 -- Here we check for the generic instantiation case and also
1629 -- for the case of processing a generic formal package. We
1630 -- detect these cases by noting that the Sloc on the node
1631 -- does not belong to the current compilation unit.
1633 Sindex := Source_Index (Current_Sem_Unit);
1635 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1636 Rewrite (N, Make_Null_Statement (Loc));
1639 -- If before first declaration, the pragma applies to the
1640 -- enclosing unit, and the name if present must be this name.
1642 elsif Is_Before_First_Decl (N, Plist) then
1643 Unit_Node := Unit_Declaration_Node (Current_Scope);
1644 Unit_Kind := Nkind (Unit_Node);
1646 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1649 elsif Unit_Kind = N_Subprogram_Body
1650 and then not Acts_As_Spec (Unit_Node)
1654 elsif Nkind (Parent_Node) = N_Package_Body then
1657 elsif Nkind (Parent_Node) = N_Package_Specification
1658 and then Plist = Private_Declarations (Parent_Node)
1662 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1663 or else Nkind (Parent_Node) =
1664 N_Generic_Subprogram_Declaration)
1665 and then Plist = Generic_Formal_Declarations (Parent_Node)
1669 elsif Arg_Count > 0 then
1670 Analyze (Expression (Arg1));
1672 if Entity (Expression (Arg1)) /= Current_Scope then
1674 ("name in pragma% must be enclosing unit", Arg1);
1677 -- It is legal to have no argument in this context
1683 -- Error if not before first declaration. This is because a
1684 -- library unit pragma argument must be the name of a library
1685 -- unit (RM 10.1.5(7)), but the only names permitted in this
1686 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1687 -- generic subprogram declarations or generic instantiations.
1691 ("pragma% misplaced, must be before first declaration");
1695 end Check_Valid_Library_Unit_Pragma;
1701 procedure Check_Variant (Variant : Node_Id) is
1702 Clist : constant Node_Id := Component_List (Variant);
1706 if not Is_Non_Empty_List (Component_Items (Clist)) then
1708 ("Unchecked_Union may not have empty component list",
1713 Comp := First (Component_Items (Clist));
1714 while Present (Comp) loop
1715 Check_Component (Comp);
1724 procedure Error_Pragma (Msg : String) is
1726 Error_Msg_Name_1 := Pname;
1727 Error_Msg_N (Msg, N);
1731 ----------------------
1732 -- Error_Pragma_Arg --
1733 ----------------------
1735 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1737 Error_Msg_Name_1 := Pname;
1738 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1740 end Error_Pragma_Arg;
1742 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1744 Error_Msg_Name_1 := Pname;
1745 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1746 Error_Pragma_Arg (Msg2, Arg);
1747 end Error_Pragma_Arg;
1749 ----------------------------
1750 -- Error_Pragma_Arg_Ident --
1751 ----------------------------
1753 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1755 Error_Msg_Name_1 := Pname;
1756 Error_Msg_N (Msg, Arg);
1758 end Error_Pragma_Arg_Ident;
1760 ----------------------
1761 -- Error_Pragma_Ref --
1762 ----------------------
1764 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id) is
1766 Error_Msg_Name_1 := Pname;
1767 Error_Msg_Sloc := Sloc (Ref);
1768 Error_Msg_NE (Msg, N, Ref);
1770 end Error_Pragma_Ref;
1772 ------------------------
1773 -- Find_Lib_Unit_Name --
1774 ------------------------
1776 function Find_Lib_Unit_Name return Entity_Id is
1778 -- Return inner compilation unit entity, for case of nested
1779 -- categorization pragmas. This happens in generic unit.
1781 if Nkind (Parent (N)) = N_Package_Specification
1782 and then Defining_Entity (Parent (N)) /= Current_Scope
1784 return Defining_Entity (Parent (N));
1786 return Current_Scope;
1788 end Find_Lib_Unit_Name;
1790 ----------------------------
1791 -- Find_Program_Unit_Name --
1792 ----------------------------
1794 procedure Find_Program_Unit_Name (Id : Node_Id) is
1795 Unit_Name : Entity_Id;
1796 Unit_Kind : Node_Kind;
1797 P : constant Node_Id := Parent (N);
1800 if Nkind (P) = N_Compilation_Unit then
1801 Unit_Kind := Nkind (Unit (P));
1803 if Unit_Kind = N_Subprogram_Declaration
1804 or else Unit_Kind = N_Package_Declaration
1805 or else Unit_Kind in N_Generic_Declaration
1807 Unit_Name := Defining_Entity (Unit (P));
1809 if Chars (Id) = Chars (Unit_Name) then
1810 Set_Entity (Id, Unit_Name);
1811 Set_Etype (Id, Etype (Unit_Name));
1813 Set_Etype (Id, Any_Type);
1815 ("cannot find program unit referenced by pragma%");
1819 Set_Etype (Id, Any_Type);
1820 Error_Pragma ("pragma% inapplicable to this unit");
1826 end Find_Program_Unit_Name;
1828 -----------------------------------------
1829 -- Find_Unique_Parameterless_Procedure --
1830 -----------------------------------------
1832 function Find_Unique_Parameterless_Procedure
1834 Arg : Node_Id) return Entity_Id
1836 Proc : Entity_Id := Empty;
1839 -- The body of this procedure needs some comments ???
1841 if not Is_Entity_Name (Name) then
1843 ("argument of pragma% must be entity name", Arg);
1845 elsif not Is_Overloaded (Name) then
1846 Proc := Entity (Name);
1848 if Ekind (Proc) /= E_Procedure
1849 or else Present (First_Formal (Proc))
1852 ("argument of pragma% must be parameterless procedure", Arg);
1857 Found : Boolean := False;
1859 Index : Interp_Index;
1862 Get_First_Interp (Name, Index, It);
1863 while Present (It.Nam) loop
1866 if Ekind (Proc) = E_Procedure
1867 and then No (First_Formal (Proc))
1871 Set_Entity (Name, Proc);
1872 Set_Is_Overloaded (Name, False);
1875 ("ambiguous handler name for pragma% ", Arg);
1879 Get_Next_Interp (Index, It);
1884 ("argument of pragma% must be parameterless procedure",
1887 Proc := Entity (Name);
1893 end Find_Unique_Parameterless_Procedure;
1895 -------------------------
1896 -- Gather_Associations --
1897 -------------------------
1899 procedure Gather_Associations
1901 Args : out Args_List)
1906 -- Initialize all parameters to Empty
1908 for J in Args'Range loop
1912 -- That's all we have to do if there are no argument associations
1914 if No (Pragma_Argument_Associations (N)) then
1918 -- Otherwise first deal with any positional parameters present
1920 Arg := First (Pragma_Argument_Associations (N));
1921 for Index in Args'Range loop
1922 exit when No (Arg) or else Chars (Arg) /= No_Name;
1923 Args (Index) := Expression (Arg);
1927 -- Positional parameters all processed, if any left, then we
1928 -- have too many positional parameters.
1930 if Present (Arg) and then Chars (Arg) = No_Name then
1932 ("too many positional associations for pragma%", Arg);
1935 -- Process named parameters if any are present
1937 while Present (Arg) loop
1938 if Chars (Arg) = No_Name then
1940 ("positional association cannot follow named association",
1944 for Index in Names'Range loop
1945 if Names (Index) = Chars (Arg) then
1946 if Present (Args (Index)) then
1948 ("duplicate argument association for pragma%", Arg);
1950 Args (Index) := Expression (Arg);
1955 if Index = Names'Last then
1956 Error_Msg_Name_1 := Pname;
1957 Error_Msg_N ("pragma% does not allow & argument", Arg);
1959 -- Check for possible misspelling
1961 for Index1 in Names'Range loop
1962 if Is_Bad_Spelling_Of
1963 (Chars (Arg), Names (Index1))
1965 Error_Msg_Name_1 := Names (Index1);
1966 Error_Msg_N -- CODEFIX
1967 ("\possible misspelling of%", Arg);
1979 end Gather_Associations;
1985 procedure GNAT_Pragma is
1987 Check_Restriction (No_Implementation_Pragmas, N);
1990 --------------------------
1991 -- Is_Before_First_Decl --
1992 --------------------------
1994 function Is_Before_First_Decl
1995 (Pragma_Node : Node_Id;
1996 Decls : List_Id) return Boolean
1998 Item : Node_Id := First (Decls);
2001 -- Only other pragmas can come before this pragma
2004 if No (Item) or else Nkind (Item) /= N_Pragma then
2007 elsif Item = Pragma_Node then
2013 end Is_Before_First_Decl;
2015 -----------------------------
2016 -- Is_Configuration_Pragma --
2017 -----------------------------
2019 -- A configuration pragma must appear in the context clause of a
2020 -- compilation unit, and only other pragmas may precede it. Note that
2021 -- the test below also permits use in a configuration pragma file.
2023 function Is_Configuration_Pragma return Boolean is
2024 Lis : constant List_Id := List_Containing (N);
2025 Par : constant Node_Id := Parent (N);
2029 -- If no parent, then we are in the configuration pragma file,
2030 -- so the placement is definitely appropriate.
2035 -- Otherwise we must be in the context clause of a compilation unit
2036 -- and the only thing allowed before us in the context list is more
2037 -- configuration pragmas.
2039 elsif Nkind (Par) = N_Compilation_Unit
2040 and then Context_Items (Par) = Lis
2047 elsif Nkind (Prg) /= N_Pragma then
2057 end Is_Configuration_Pragma;
2059 --------------------------
2060 -- Is_In_Context_Clause --
2061 --------------------------
2063 function Is_In_Context_Clause return Boolean is
2065 Parent_Node : Node_Id;
2068 if not Is_List_Member (N) then
2072 Plist := List_Containing (N);
2073 Parent_Node := Parent (Plist);
2075 if Parent_Node = Empty
2076 or else Nkind (Parent_Node) /= N_Compilation_Unit
2077 or else Context_Items (Parent_Node) /= Plist
2084 end Is_In_Context_Clause;
2086 ---------------------------------
2087 -- Is_Static_String_Expression --
2088 ---------------------------------
2090 function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
2091 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
2094 Analyze_And_Resolve (Argx);
2095 return Is_OK_Static_Expression (Argx)
2096 and then Nkind (Argx) = N_String_Literal;
2097 end Is_Static_String_Expression;
2099 ----------------------
2100 -- Pragma_Misplaced --
2101 ----------------------
2103 procedure Pragma_Misplaced is
2105 Error_Pragma ("incorrect placement of pragma%");
2106 end Pragma_Misplaced;
2108 ------------------------------------
2109 -- Process Atomic_Shared_Volatile --
2110 ------------------------------------
2112 procedure Process_Atomic_Shared_Volatile is
2119 procedure Set_Atomic (E : Entity_Id);
2120 -- Set given type as atomic, and if no explicit alignment was given,
2121 -- set alignment to unknown, since back end knows what the alignment
2122 -- requirements are for atomic arrays. Note: this step is necessary
2123 -- for derived types.
2129 procedure Set_Atomic (E : Entity_Id) is
2133 if not Has_Alignment_Clause (E) then
2134 Set_Alignment (E, Uint_0);
2138 -- Start of processing for Process_Atomic_Shared_Volatile
2141 Check_Ada_83_Warning;
2142 Check_No_Identifiers;
2143 Check_Arg_Count (1);
2144 Check_Arg_Is_Local_Name (Arg1);
2145 E_Id := Expression (Arg1);
2147 if Etype (E_Id) = Any_Type then
2152 D := Declaration_Node (E);
2156 if Rep_Item_Too_Early (E, N)
2158 Rep_Item_Too_Late (E, N)
2162 Check_First_Subtype (Arg1);
2165 if Prag_Id /= Pragma_Volatile then
2167 Set_Atomic (Underlying_Type (E));
2168 Set_Atomic (Base_Type (E));
2171 -- Attribute belongs on the base type. If the view of the type is
2172 -- currently private, it also belongs on the underlying type.
2174 Set_Is_Volatile (Base_Type (E));
2175 Set_Is_Volatile (Underlying_Type (E));
2177 Set_Treat_As_Volatile (E);
2178 Set_Treat_As_Volatile (Underlying_Type (E));
2180 elsif K = N_Object_Declaration
2181 or else (K = N_Component_Declaration
2182 and then Original_Record_Component (E) = E)
2184 if Rep_Item_Too_Late (E, N) then
2188 if Prag_Id /= Pragma_Volatile then
2191 -- If the object declaration has an explicit initialization, a
2192 -- temporary may have to be created to hold the expression, to
2193 -- ensure that access to the object remain atomic.
2195 if Nkind (Parent (E)) = N_Object_Declaration
2196 and then Present (Expression (Parent (E)))
2198 Set_Has_Delayed_Freeze (E);
2201 -- An interesting improvement here. If an object of type X is
2202 -- declared atomic, and the type X is not atomic, that's a
2203 -- pity, since it may not have appropriate alignment etc. We
2204 -- can rescue this in the special case where the object and
2205 -- type are in the same unit by just setting the type as
2206 -- atomic, so that the back end will process it as atomic.
2208 Utyp := Underlying_Type (Etype (E));
2211 and then Sloc (E) > No_Location
2212 and then Sloc (Utyp) > No_Location
2214 Get_Source_File_Index (Sloc (E)) =
2215 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
2217 Set_Is_Atomic (Underlying_Type (Etype (E)));
2221 Set_Is_Volatile (E);
2222 Set_Treat_As_Volatile (E);
2226 ("inappropriate entity for pragma%", Arg1);
2228 end Process_Atomic_Shared_Volatile;
2230 -------------------------------------------
2231 -- Process_Compile_Time_Warning_Or_Error --
2232 -------------------------------------------
2234 procedure Process_Compile_Time_Warning_Or_Error is
2235 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
2238 Check_Arg_Count (2);
2239 Check_No_Identifiers;
2240 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
2241 Analyze_And_Resolve (Arg1x, Standard_Boolean);
2243 if Compile_Time_Known_Value (Arg1x) then
2244 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
2246 Str : constant String_Id :=
2247 Strval (Get_Pragma_Arg (Arg2));
2248 Len : constant Int := String_Length (Str);
2253 Cent : constant Entity_Id :=
2254 Cunit_Entity (Current_Sem_Unit);
2256 Force : constant Boolean :=
2257 Prag_Id = Pragma_Compile_Time_Warning
2259 Is_Spec_Name (Unit_Name (Current_Sem_Unit))
2260 and then (Ekind (Cent) /= E_Package
2261 or else not In_Private_Part (Cent));
2262 -- Set True if this is the warning case, and we are in the
2263 -- visible part of a package spec, or in a subprogram spec,
2264 -- in which case we want to force the client to see the
2265 -- warning, even though it is not in the main unit.
2268 -- Loop through segments of message separated by line feeds.
2269 -- We output these segments as separate messages with
2270 -- continuation marks for all but the first.
2275 Error_Msg_Strlen := 0;
2277 -- Loop to copy characters from argument to error message
2281 exit when Ptr > Len;
2282 CC := Get_String_Char (Str, Ptr);
2285 -- Ignore wide chars ??? else store character
2287 if In_Character_Range (CC) then
2288 C := Get_Character (CC);
2289 exit when C = ASCII.LF;
2290 Error_Msg_Strlen := Error_Msg_Strlen + 1;
2291 Error_Msg_String (Error_Msg_Strlen) := C;
2295 -- Here with one line ready to go
2297 Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning;
2299 -- If this is a warning in a spec, then we want clients
2300 -- to see the warning, so mark the message with the
2301 -- special sequence !! to force the warning. In the case
2302 -- of a package spec, we do not force this if we are in
2303 -- the private part of the spec.
2306 if Cont = False then
2307 Error_Msg_N ("<~!!", Arg1);
2310 Error_Msg_N ("\<~!!", Arg1);
2313 -- Error, rather than warning, or in a body, so we do not
2314 -- need to force visibility for client (error will be
2315 -- output in any case, and this is the situation in which
2316 -- we do not want a client to get a warning, since the
2317 -- warning is in the body or the spec private part.
2320 if Cont = False then
2321 Error_Msg_N ("<~", Arg1);
2324 Error_Msg_N ("\<~", Arg1);
2328 exit when Ptr > Len;
2333 end Process_Compile_Time_Warning_Or_Error;
2335 ------------------------
2336 -- Process_Convention --
2337 ------------------------
2339 procedure Process_Convention
2340 (C : out Convention_Id;
2341 Ent : out Entity_Id)
2347 Comp_Unit : Unit_Number_Type;
2349 procedure Diagnose_Multiple_Pragmas (S : Entity_Id);
2350 -- Called if we have more than one Export/Import/Convention pragma.
2351 -- This is generally illegal, but we have a special case of allowing
2352 -- Import and Interface to coexist if they specify the convention in
2353 -- a consistent manner. We are allowed to do this, since Interface is
2354 -- an implementation defined pragma, and we choose to do it since we
2355 -- know Rational allows this combination. S is the entity id of the
2356 -- subprogram in question. This procedure also sets the special flag
2357 -- Import_Interface_Present in both pragmas in the case where we do
2358 -- have matching Import and Interface pragmas.
2360 procedure Set_Convention_From_Pragma (E : Entity_Id);
2361 -- Set convention in entity E, and also flag that the entity has a
2362 -- convention pragma. If entity is for a private or incomplete type,
2363 -- also set convention and flag on underlying type. This procedure
2364 -- also deals with the special case of C_Pass_By_Copy convention.
2366 -------------------------------
2367 -- Diagnose_Multiple_Pragmas --
2368 -------------------------------
2370 procedure Diagnose_Multiple_Pragmas (S : Entity_Id) is
2371 Pdec : constant Node_Id := Declaration_Node (S);
2375 function Same_Convention (Decl : Node_Id) return Boolean;
2376 -- Decl is a pragma node. This function returns True if this
2377 -- pragma has a first argument that is an identifier with a
2378 -- Chars field corresponding to the Convention_Id C.
2380 function Same_Name (Decl : Node_Id) return Boolean;
2381 -- Decl is a pragma node. This function returns True if this
2382 -- pragma has a second argument that is an identifier with a
2383 -- Chars field that matches the Chars of the current subprogram.
2385 ---------------------
2386 -- Same_Convention --
2387 ---------------------
2389 function Same_Convention (Decl : Node_Id) return Boolean is
2390 Arg1 : constant Node_Id :=
2391 First (Pragma_Argument_Associations (Decl));
2394 if Present (Arg1) then
2396 Arg : constant Node_Id := Get_Pragma_Arg (Arg1);
2398 if Nkind (Arg) = N_Identifier
2399 and then Is_Convention_Name (Chars (Arg))
2400 and then Get_Convention_Id (Chars (Arg)) = C
2408 end Same_Convention;
2414 function Same_Name (Decl : Node_Id) return Boolean is
2415 Arg1 : constant Node_Id :=
2416 First (Pragma_Argument_Associations (Decl));
2424 Arg2 := Next (Arg1);
2431 Arg : constant Node_Id := Get_Pragma_Arg (Arg2);
2433 if Nkind (Arg) = N_Identifier
2434 and then Chars (Arg) = Chars (S)
2443 -- Start of processing for Diagnose_Multiple_Pragmas
2448 -- Definitely give message if we have Convention/Export here
2450 if Prag_Id = Pragma_Convention or else Prag_Id = Pragma_Export then
2453 -- If we have an Import or Export, scan back from pragma to
2454 -- find any previous pragma applying to the same procedure.
2455 -- The scan will be terminated by the start of the list, or
2456 -- hitting the subprogram declaration. This won't allow one
2457 -- pragma to appear in the public part and one in the private
2458 -- part, but that seems very unlikely in practice.
2462 while Present (Decl) and then Decl /= Pdec loop
2464 -- Look for pragma with same name as us
2466 if Nkind (Decl) = N_Pragma
2467 and then Same_Name (Decl)
2469 -- Give error if same as our pragma or Export/Convention
2471 if Pragma_Name (Decl) = Name_Export
2473 Pragma_Name (Decl) = Name_Convention
2475 Pragma_Name (Decl) = Pragma_Name (N)
2479 -- Case of Import/Interface or the other way round
2481 elsif Pragma_Name (Decl) = Name_Interface
2483 Pragma_Name (Decl) = Name_Import
2485 -- Here we know that we have Import and Interface. It
2486 -- doesn't matter which way round they are. See if
2487 -- they specify the same convention. If so, all OK,
2488 -- and set special flags to stop other messages
2490 if Same_Convention (Decl) then
2491 Set_Import_Interface_Present (N);
2492 Set_Import_Interface_Present (Decl);
2495 -- If different conventions, special message
2498 Error_Msg_Sloc := Sloc (Decl);
2500 ("convention differs from that given#", Arg1);
2510 -- Give message if needed if we fall through those tests
2514 ("at most one Convention/Export/Import pragma is allowed",
2517 end Diagnose_Multiple_Pragmas;
2519 --------------------------------
2520 -- Set_Convention_From_Pragma --
2521 --------------------------------
2523 procedure Set_Convention_From_Pragma (E : Entity_Id) is
2525 -- Ada 2005 (AI-430): Check invalid attempt to change convention
2526 -- for an overridden dispatching operation. Technically this is
2527 -- an amendment and should only be done in Ada 2005 mode. However,
2528 -- this is clearly a mistake, since the problem that is addressed
2529 -- by this AI is that there is a clear gap in the RM!
2531 if Is_Dispatching_Operation (E)
2532 and then Present (Overridden_Operation (E))
2533 and then C /= Convention (Overridden_Operation (E))
2536 ("cannot change convention for " &
2537 "overridden dispatching operation",
2541 -- Set the convention
2543 Set_Convention (E, C);
2544 Set_Has_Convention_Pragma (E);
2546 if Is_Incomplete_Or_Private_Type (E) then
2547 Set_Convention (Underlying_Type (E), C);
2548 Set_Has_Convention_Pragma (Underlying_Type (E), True);
2551 -- A class-wide type should inherit the convention of the specific
2552 -- root type (although this isn't specified clearly by the RM).
2554 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
2555 Set_Convention (Class_Wide_Type (E), C);
2558 -- If the entity is a record type, then check for special case of
2559 -- C_Pass_By_Copy, which is treated the same as C except that the
2560 -- special record flag is set. This convention is only permitted
2561 -- on record types (see AI95-00131).
2563 if Cname = Name_C_Pass_By_Copy then
2564 if Is_Record_Type (E) then
2565 Set_C_Pass_By_Copy (Base_Type (E));
2566 elsif Is_Incomplete_Or_Private_Type (E)
2567 and then Is_Record_Type (Underlying_Type (E))
2569 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
2572 ("C_Pass_By_Copy convention allowed only for record type",
2577 -- If the entity is a derived boolean type, check for the special
2578 -- case of convention C, C++, or Fortran, where we consider any
2579 -- nonzero value to represent true.
2581 if Is_Discrete_Type (E)
2582 and then Root_Type (Etype (E)) = Standard_Boolean
2588 C = Convention_Fortran)
2590 Set_Nonzero_Is_True (Base_Type (E));
2592 end Set_Convention_From_Pragma;
2594 -- Start of processing for Process_Convention
2597 Check_At_Least_N_Arguments (2);
2598 Check_Optional_Identifier (Arg1, Name_Convention);
2599 Check_Arg_Is_Identifier (Arg1);
2600 Cname := Chars (Expression (Arg1));
2602 -- C_Pass_By_Copy is treated as a synonym for convention C (this is
2603 -- tested again below to set the critical flag).
2604 if Cname = Name_C_Pass_By_Copy then
2607 -- Otherwise we must have something in the standard convention list
2609 elsif Is_Convention_Name (Cname) then
2610 C := Get_Convention_Id (Chars (Expression (Arg1)));
2612 -- In DEC VMS, it seems that there is an undocumented feature that
2613 -- any unrecognized convention is treated as the default, which for
2614 -- us is convention C. It does not seem so terrible to do this
2615 -- unconditionally, silently in the VMS case, and with a warning
2616 -- in the non-VMS case.
2619 if Warn_On_Export_Import and not OpenVMS_On_Target then
2621 ("?unrecognized convention name, C assumed",
2628 Check_Optional_Identifier (Arg2, Name_Entity);
2629 Check_Arg_Is_Local_Name (Arg2);
2631 Id := Expression (Arg2);
2634 if not Is_Entity_Name (Id) then
2635 Error_Pragma_Arg ("entity name required", Arg2);
2640 -- Set entity to return
2644 -- Go to renamed subprogram if present, since convention applies to
2645 -- the actual renamed entity, not to the renaming entity. If the
2646 -- subprogram is inherited, go to parent subprogram.
2648 if Is_Subprogram (E)
2649 and then Present (Alias (E))
2651 if Nkind (Parent (Declaration_Node (E))) =
2652 N_Subprogram_Renaming_Declaration
2654 if Scope (E) /= Scope (Alias (E)) then
2656 ("cannot apply pragma% to non-local entity&#", E);
2661 elsif Nkind_In (Parent (E), N_Full_Type_Declaration,
2662 N_Private_Extension_Declaration)
2663 and then Scope (E) = Scope (Alias (E))
2667 -- Return the parent subprogram the entity was inherited from
2673 -- Check that we are not applying this to a specless body
2675 if Is_Subprogram (E)
2676 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2679 ("pragma% requires separate spec and must come before body");
2682 -- Check that we are not applying this to a named constant
2684 if Ekind_In (E, E_Named_Integer, E_Named_Real) then
2685 Error_Msg_Name_1 := Pname;
2687 ("cannot apply pragma% to named constant!",
2688 Get_Pragma_Arg (Arg2));
2690 ("\supply appropriate type for&!", Arg2);
2693 if Ekind (E) = E_Enumeration_Literal then
2694 Error_Pragma ("enumeration literal not allowed for pragma%");
2697 -- Check for rep item appearing too early or too late
2699 if Etype (E) = Any_Type
2700 or else Rep_Item_Too_Early (E, N)
2704 E := Underlying_Type (E);
2707 if Rep_Item_Too_Late (E, N) then
2711 if Has_Convention_Pragma (E) then
2712 Diagnose_Multiple_Pragmas (E);
2714 elsif Convention (E) = Convention_Protected
2715 or else Ekind (Scope (E)) = E_Protected_Type
2718 ("a protected operation cannot be given a different convention",
2722 -- For Intrinsic, a subprogram is required
2724 if C = Convention_Intrinsic
2725 and then not Is_Subprogram (E)
2726 and then not Is_Generic_Subprogram (E)
2729 ("second argument of pragma% must be a subprogram", Arg2);
2732 -- For Stdcall, a subprogram, variable or subprogram type is required
2734 if C = Convention_Stdcall
2735 and then not Is_Subprogram (E)
2736 and then not Is_Generic_Subprogram (E)
2737 and then Ekind (E) /= E_Variable
2740 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2743 ("second argument of pragma% must be subprogram (type)",
2747 if not Is_Subprogram (E)
2748 and then not Is_Generic_Subprogram (E)
2750 Set_Convention_From_Pragma (E);
2753 Check_First_Subtype (Arg2);
2754 Set_Convention_From_Pragma (Base_Type (E));
2756 -- For subprograms, we must set the convention on the
2757 -- internally generated directly designated type as well.
2759 if Ekind (E) = E_Access_Subprogram_Type then
2760 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2764 -- For the subprogram case, set proper convention for all homonyms
2765 -- in same scope and the same declarative part, i.e. the same
2766 -- compilation unit.
2769 Comp_Unit := Get_Source_Unit (E);
2770 Set_Convention_From_Pragma (E);
2772 -- Treat a pragma Import as an implicit body, for GPS use
2774 if Prag_Id = Pragma_Import then
2775 Generate_Reference (E, Id, 'b');
2778 -- Loop through the homonyms of the pragma argument's entity
2783 exit when No (E1) or else Scope (E1) /= Current_Scope;
2785 -- Do not set the pragma on inherited operations or on formal
2788 if Comes_From_Source (E1)
2789 and then Comp_Unit = Get_Source_Unit (E1)
2790 and then not Is_Formal_Subprogram (E1)
2791 and then Nkind (Original_Node (Parent (E1))) /=
2792 N_Full_Type_Declaration
2794 if Present (Alias (E1))
2795 and then Scope (E1) /= Scope (Alias (E1))
2798 ("cannot apply pragma% to non-local entity& declared#",
2802 Set_Convention_From_Pragma (E1);
2804 if Prag_Id = Pragma_Import then
2805 Generate_Reference (E1, Id, 'b');
2810 end Process_Convention;
2812 -----------------------------------------------------
2813 -- Process_Extended_Import_Export_Exception_Pragma --
2814 -----------------------------------------------------
2816 procedure Process_Extended_Import_Export_Exception_Pragma
2817 (Arg_Internal : Node_Id;
2818 Arg_External : Node_Id;
2826 if not OpenVMS_On_Target then
2828 ("?pragma% ignored (applies only to Open'V'M'S)");
2831 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2832 Def_Id := Entity (Arg_Internal);
2834 if Ekind (Def_Id) /= E_Exception then
2836 ("pragma% must refer to declared exception", Arg_Internal);
2839 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2841 if Present (Arg_Form) then
2842 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2845 if Present (Arg_Form)
2846 and then Chars (Arg_Form) = Name_Ada
2850 Set_Is_VMS_Exception (Def_Id);
2851 Set_Exception_Code (Def_Id, No_Uint);
2854 if Present (Arg_Code) then
2855 if not Is_VMS_Exception (Def_Id) then
2857 ("Code option for pragma% not allowed for Ada case",
2861 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2862 Code_Val := Expr_Value (Arg_Code);
2864 if not UI_Is_In_Int_Range (Code_Val) then
2866 ("Code option for pragma% must be in 32-bit range",
2870 Set_Exception_Code (Def_Id, Code_Val);
2873 end Process_Extended_Import_Export_Exception_Pragma;
2875 -------------------------------------------------
2876 -- Process_Extended_Import_Export_Internal_Arg --
2877 -------------------------------------------------
2879 procedure Process_Extended_Import_Export_Internal_Arg
2880 (Arg_Internal : Node_Id := Empty)
2883 if No (Arg_Internal) then
2884 Error_Pragma ("Internal parameter required for pragma%");
2887 if Nkind (Arg_Internal) = N_Identifier then
2890 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2891 and then (Prag_Id = Pragma_Import_Function
2893 Prag_Id = Pragma_Export_Function)
2899 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2902 Check_Arg_Is_Local_Name (Arg_Internal);
2903 end Process_Extended_Import_Export_Internal_Arg;
2905 --------------------------------------------------
2906 -- Process_Extended_Import_Export_Object_Pragma --
2907 --------------------------------------------------
2909 procedure Process_Extended_Import_Export_Object_Pragma
2910 (Arg_Internal : Node_Id;
2911 Arg_External : Node_Id;
2917 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2918 Def_Id := Entity (Arg_Internal);
2920 if not Ekind_In (Def_Id, E_Constant, E_Variable) then
2922 ("pragma% must designate an object", Arg_Internal);
2925 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2927 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2930 ("previous Common/Psect_Object applies, pragma % not permitted",
2934 if Rep_Item_Too_Late (Def_Id, N) then
2938 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2940 if Present (Arg_Size) then
2941 Check_Arg_Is_External_Name (Arg_Size);
2944 -- Export_Object case
2946 if Prag_Id = Pragma_Export_Object then
2947 if not Is_Library_Level_Entity (Def_Id) then
2949 ("argument for pragma% must be library level entity",
2953 if Ekind (Current_Scope) = E_Generic_Package then
2954 Error_Pragma ("pragma& cannot appear in a generic unit");
2957 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2959 ("exported object must have compile time known size",
2963 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2964 Error_Msg_N ("?duplicate Export_Object pragma", N);
2966 Set_Exported (Def_Id, Arg_Internal);
2969 -- Import_Object case
2972 if Is_Concurrent_Type (Etype (Def_Id)) then
2974 ("cannot use pragma% for task/protected object",
2978 if Ekind (Def_Id) = E_Constant then
2980 ("cannot import a constant", Arg_Internal);
2983 if Warn_On_Export_Import
2984 and then Has_Discriminants (Etype (Def_Id))
2987 ("imported value must be initialized?", Arg_Internal);
2990 if Warn_On_Export_Import
2991 and then Is_Access_Type (Etype (Def_Id))
2994 ("cannot import object of an access type?", Arg_Internal);
2997 if Warn_On_Export_Import
2998 and then Is_Imported (Def_Id)
3001 ("?duplicate Import_Object pragma", N);
3003 -- Check for explicit initialization present. Note that an
3004 -- initialization generated by the code generator, e.g. for an
3005 -- access type, does not count here.
3007 elsif Present (Expression (Parent (Def_Id)))
3010 (Original_Node (Expression (Parent (Def_Id))))
3012 Error_Msg_Sloc := Sloc (Def_Id);
3014 ("imported entities cannot be initialized (RM B.1(24))",
3015 "\no initialization allowed for & declared#", Arg1);
3017 Set_Imported (Def_Id);
3018 Note_Possible_Modification (Arg_Internal, Sure => False);
3021 end Process_Extended_Import_Export_Object_Pragma;
3023 ------------------------------------------------------
3024 -- Process_Extended_Import_Export_Subprogram_Pragma --
3025 ------------------------------------------------------
3027 procedure Process_Extended_Import_Export_Subprogram_Pragma
3028 (Arg_Internal : Node_Id;
3029 Arg_External : Node_Id;
3030 Arg_Parameter_Types : Node_Id;
3031 Arg_Result_Type : Node_Id := Empty;
3032 Arg_Mechanism : Node_Id;
3033 Arg_Result_Mechanism : Node_Id := Empty;
3034 Arg_First_Optional_Parameter : Node_Id := Empty)
3040 Ambiguous : Boolean;
3044 function Same_Base_Type
3046 Formal : Entity_Id) return Boolean;
3047 -- Determines if Ptype references the type of Formal. Note that only
3048 -- the base types need to match according to the spec. Ptype here is
3049 -- the argument from the pragma, which is either a type name, or an
3050 -- access attribute.
3052 --------------------
3053 -- Same_Base_Type --
3054 --------------------
3056 function Same_Base_Type
3058 Formal : Entity_Id) return Boolean
3060 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
3064 -- Case where pragma argument is typ'Access
3066 if Nkind (Ptype) = N_Attribute_Reference
3067 and then Attribute_Name (Ptype) = Name_Access
3069 Pref := Prefix (Ptype);
3072 if not Is_Entity_Name (Pref)
3073 or else Entity (Pref) = Any_Type
3078 -- We have a match if the corresponding argument is of an
3079 -- anonymous access type, and its designated type matches the
3080 -- type of the prefix of the access attribute
3082 return Ekind (Ftyp) = E_Anonymous_Access_Type
3083 and then Base_Type (Entity (Pref)) =
3084 Base_Type (Etype (Designated_Type (Ftyp)));
3086 -- Case where pragma argument is a type name
3091 if not Is_Entity_Name (Ptype)
3092 or else Entity (Ptype) = Any_Type
3097 -- We have a match if the corresponding argument is of the type
3098 -- given in the pragma (comparing base types)
3100 return Base_Type (Entity (Ptype)) = Ftyp;
3104 -- Start of processing for
3105 -- Process_Extended_Import_Export_Subprogram_Pragma
3108 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
3112 -- Loop through homonyms (overloadings) of the entity
3114 Hom_Id := Entity (Arg_Internal);
3115 while Present (Hom_Id) loop
3116 Def_Id := Get_Base_Subprogram (Hom_Id);
3118 -- We need a subprogram in the current scope
3120 if not Is_Subprogram (Def_Id)
3121 or else Scope (Def_Id) /= Current_Scope
3128 -- Pragma cannot apply to subprogram body
3130 if Is_Subprogram (Def_Id)
3131 and then Nkind (Parent (Declaration_Node (Def_Id))) =
3135 ("pragma% requires separate spec"
3136 & " and must come before body");
3139 -- Test result type if given, note that the result type
3140 -- parameter can only be present for the function cases.
3142 if Present (Arg_Result_Type)
3143 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
3147 elsif Etype (Def_Id) /= Standard_Void_Type
3149 (Pname = Name_Export_Procedure
3151 Pname = Name_Import_Procedure)
3155 -- Test parameter types if given. Note that this parameter
3156 -- has not been analyzed (and must not be, since it is
3157 -- semantic nonsense), so we get it as the parser left it.
3159 elsif Present (Arg_Parameter_Types) then
3160 Check_Matching_Types : declare
3165 Formal := First_Formal (Def_Id);
3167 if Nkind (Arg_Parameter_Types) = N_Null then
3168 if Present (Formal) then
3172 -- A list of one type, e.g. (List) is parsed as
3173 -- a parenthesized expression.
3175 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
3176 and then Paren_Count (Arg_Parameter_Types) = 1
3179 or else Present (Next_Formal (Formal))
3184 Same_Base_Type (Arg_Parameter_Types, Formal);
3187 -- A list of more than one type is parsed as a aggregate
3189 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
3190 and then Paren_Count (Arg_Parameter_Types) = 0
3192 Ptype := First (Expressions (Arg_Parameter_Types));
3193 while Present (Ptype) or else Present (Formal) loop
3196 or else not Same_Base_Type (Ptype, Formal)
3201 Next_Formal (Formal);
3206 -- Anything else is of the wrong form
3210 ("wrong form for Parameter_Types parameter",
3211 Arg_Parameter_Types);
3213 end Check_Matching_Types;
3216 -- Match is now False if the entry we found did not match
3217 -- either a supplied Parameter_Types or Result_Types argument
3223 -- Ambiguous case, the flag Ambiguous shows if we already
3224 -- detected this and output the initial messages.
3227 if not Ambiguous then
3229 Error_Msg_Name_1 := Pname;
3231 ("pragma% does not uniquely identify subprogram!",
3233 Error_Msg_Sloc := Sloc (Ent);
3234 Error_Msg_N ("matching subprogram #!", N);
3238 Error_Msg_Sloc := Sloc (Def_Id);
3239 Error_Msg_N ("matching subprogram #!", N);
3244 Hom_Id := Homonym (Hom_Id);
3247 -- See if we found an entry
3250 if not Ambiguous then
3251 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
3253 ("pragma% cannot be given for generic subprogram");
3256 ("pragma% does not identify local subprogram");
3263 -- Import pragmas must be for imported entities
3265 if Prag_Id = Pragma_Import_Function
3267 Prag_Id = Pragma_Import_Procedure
3269 Prag_Id = Pragma_Import_Valued_Procedure
3271 if not Is_Imported (Ent) then
3273 ("pragma Import or Interface must precede pragma%");
3276 -- Here we have the Export case which can set the entity as exported
3278 -- But does not do so if the specified external name is null, since
3279 -- that is taken as a signal in DEC Ada 83 (with which we want to be
3280 -- compatible) to request no external name.
3282 elsif Nkind (Arg_External) = N_String_Literal
3283 and then String_Length (Strval (Arg_External)) = 0
3287 -- In all other cases, set entity as exported
3290 Set_Exported (Ent, Arg_Internal);
3293 -- Special processing for Valued_Procedure cases
3295 if Prag_Id = Pragma_Import_Valued_Procedure
3297 Prag_Id = Pragma_Export_Valued_Procedure
3299 Formal := First_Formal (Ent);
3302 Error_Pragma ("at least one parameter required for pragma%");
3304 elsif Ekind (Formal) /= E_Out_Parameter then
3305 Error_Pragma ("first parameter must have mode out for pragma%");
3308 Set_Is_Valued_Procedure (Ent);
3312 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
3314 -- Process Result_Mechanism argument if present. We have already
3315 -- checked that this is only allowed for the function case.
3317 if Present (Arg_Result_Mechanism) then
3318 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
3321 -- Process Mechanism parameter if present. Note that this parameter
3322 -- is not analyzed, and must not be analyzed since it is semantic
3323 -- nonsense, so we get it in exactly as the parser left it.
3325 if Present (Arg_Mechanism) then
3333 -- A single mechanism association without a formal parameter
3334 -- name is parsed as a parenthesized expression. All other
3335 -- cases are parsed as aggregates, so we rewrite the single
3336 -- parameter case as an aggregate for consistency.
3338 if Nkind (Arg_Mechanism) /= N_Aggregate
3339 and then Paren_Count (Arg_Mechanism) = 1
3341 Rewrite (Arg_Mechanism,
3342 Make_Aggregate (Sloc (Arg_Mechanism),
3343 Expressions => New_List (
3344 Relocate_Node (Arg_Mechanism))));
3347 -- Case of only mechanism name given, applies to all formals
3349 if Nkind (Arg_Mechanism) /= N_Aggregate then
3350 Formal := First_Formal (Ent);
3351 while Present (Formal) loop
3352 Set_Mechanism_Value (Formal, Arg_Mechanism);
3353 Next_Formal (Formal);
3356 -- Case of list of mechanism associations given
3359 if Null_Record_Present (Arg_Mechanism) then
3361 ("inappropriate form for Mechanism parameter",
3365 -- Deal with positional ones first
3367 Formal := First_Formal (Ent);
3369 if Present (Expressions (Arg_Mechanism)) then
3370 Mname := First (Expressions (Arg_Mechanism));
3371 while Present (Mname) loop
3374 ("too many mechanism associations", Mname);
3377 Set_Mechanism_Value (Formal, Mname);
3378 Next_Formal (Formal);
3383 -- Deal with named entries
3385 if Present (Component_Associations (Arg_Mechanism)) then
3386 Massoc := First (Component_Associations (Arg_Mechanism));
3387 while Present (Massoc) loop
3388 Choice := First (Choices (Massoc));
3390 if Nkind (Choice) /= N_Identifier
3391 or else Present (Next (Choice))
3394 ("incorrect form for mechanism association",
3398 Formal := First_Formal (Ent);
3402 ("parameter name & not present", Choice);
3405 if Chars (Choice) = Chars (Formal) then
3407 (Formal, Expression (Massoc));
3409 -- Set entity on identifier for ASIS
3411 Set_Entity (Choice, Formal);
3416 Next_Formal (Formal);
3426 -- Process First_Optional_Parameter argument if present. We have
3427 -- already checked that this is only allowed for the Import case.
3429 if Present (Arg_First_Optional_Parameter) then
3430 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
3432 ("first optional parameter must be formal parameter name",
3433 Arg_First_Optional_Parameter);
3436 Formal := First_Formal (Ent);
3440 ("specified formal parameter& not found",
3441 Arg_First_Optional_Parameter);
3444 exit when Chars (Formal) =
3445 Chars (Arg_First_Optional_Parameter);
3447 Next_Formal (Formal);
3450 Set_First_Optional_Parameter (Ent, Formal);
3452 -- Check specified and all remaining formals have right form
3454 while Present (Formal) loop
3455 if Ekind (Formal) /= E_In_Parameter then
3457 ("optional formal& is not of mode in!",
3458 Arg_First_Optional_Parameter, Formal);
3461 Dval := Default_Value (Formal);
3465 ("optional formal& does not have default value!",
3466 Arg_First_Optional_Parameter, Formal);
3468 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
3473 ("default value for optional formal& is non-static!",
3474 Arg_First_Optional_Parameter, Formal);
3478 Set_Is_Optional_Parameter (Formal);
3479 Next_Formal (Formal);
3482 end Process_Extended_Import_Export_Subprogram_Pragma;
3484 --------------------------
3485 -- Process_Generic_List --
3486 --------------------------
3488 procedure Process_Generic_List is
3493 Check_No_Identifiers;
3494 Check_At_Least_N_Arguments (1);
3497 while Present (Arg) loop
3498 Exp := Expression (Arg);
3501 if not Is_Entity_Name (Exp)
3503 (not Is_Generic_Instance (Entity (Exp))
3505 not Is_Generic_Unit (Entity (Exp)))
3508 ("pragma% argument must be name of generic unit/instance",
3514 end Process_Generic_List;
3516 ---------------------------------
3517 -- Process_Import_Or_Interface --
3518 ---------------------------------
3520 procedure Process_Import_Or_Interface is
3526 Process_Convention (C, Def_Id);
3527 Kill_Size_Check_Code (Def_Id);
3528 Note_Possible_Modification (Expression (Arg2), Sure => False);
3530 if Ekind_In (Def_Id, E_Variable, E_Constant) then
3532 -- We do not permit Import to apply to a renaming declaration
3534 if Present (Renamed_Object (Def_Id)) then
3536 ("pragma% not allowed for object renaming", Arg2);
3538 -- User initialization is not allowed for imported object, but
3539 -- the object declaration may contain a default initialization,
3540 -- that will be discarded. Note that an explicit initialization
3541 -- only counts if it comes from source, otherwise it is simply
3542 -- the code generator making an implicit initialization explicit.
3544 elsif Present (Expression (Parent (Def_Id)))
3545 and then Comes_From_Source (Expression (Parent (Def_Id)))
3547 Error_Msg_Sloc := Sloc (Def_Id);
3549 ("no initialization allowed for declaration of& #",
3550 "\imported entities cannot be initialized (RM B.1(24))",
3554 Set_Imported (Def_Id);
3555 Process_Interface_Name (Def_Id, Arg3, Arg4);
3557 -- Note that we do not set Is_Public here. That's because we
3558 -- only want to set it if there is no address clause, and we
3559 -- don't know that yet, so we delay that processing till
3562 -- pragma Import completes deferred constants
3564 if Ekind (Def_Id) = E_Constant then
3565 Set_Has_Completion (Def_Id);
3568 -- It is not possible to import a constant of an unconstrained
3569 -- array type (e.g. string) because there is no simple way to
3570 -- write a meaningful subtype for it.
3572 if Is_Array_Type (Etype (Def_Id))
3573 and then not Is_Constrained (Etype (Def_Id))
3576 ("imported constant& must have a constrained subtype",
3581 elsif Is_Subprogram (Def_Id)
3582 or else Is_Generic_Subprogram (Def_Id)
3584 -- If the name is overloaded, pragma applies to all of the
3585 -- denoted entities in the same declarative part.
3588 while Present (Hom_Id) loop
3589 Def_Id := Get_Base_Subprogram (Hom_Id);
3591 -- Ignore inherited subprograms because the pragma will
3592 -- apply to the parent operation, which is the one called.
3594 if Is_Overloadable (Def_Id)
3595 and then Present (Alias (Def_Id))
3599 -- If it is not a subprogram, it must be in an outer scope and
3600 -- pragma does not apply.
3602 elsif not Is_Subprogram (Def_Id)
3603 and then not Is_Generic_Subprogram (Def_Id)
3607 -- Verify that the homonym is in the same declarative part (not
3608 -- just the same scope).
3610 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
3611 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
3616 Set_Imported (Def_Id);
3618 -- Reject an Import applied to an abstract subprogram
3620 if Is_Subprogram (Def_Id)
3621 and then Is_Abstract_Subprogram (Def_Id)
3623 Error_Msg_Sloc := Sloc (Def_Id);
3625 ("cannot import abstract subprogram& declared#",
3629 -- Special processing for Convention_Intrinsic
3631 if C = Convention_Intrinsic then
3633 -- Link_Name argument not allowed for intrinsic
3636 and then Chars (Arg3) = Name_Link_Name
3641 if Present (Arg4) then
3643 ("Link_Name argument not allowed for " &
3648 Set_Is_Intrinsic_Subprogram (Def_Id);
3650 -- If no external name is present, then check that this
3651 -- is a valid intrinsic subprogram. If an external name
3652 -- is present, then this is handled by the back end.
3655 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
3659 -- All interfaced procedures need an external symbol created
3660 -- for them since they are always referenced from another
3663 Set_Is_Public (Def_Id);
3665 -- Verify that the subprogram does not have a completion
3666 -- through a renaming declaration. For other completions the
3667 -- pragma appears as a too late representation.
3670 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3674 and then Nkind (Decl) = N_Subprogram_Declaration
3675 and then Present (Corresponding_Body (Decl))
3676 and then Nkind (Unit_Declaration_Node
3677 (Corresponding_Body (Decl))) =
3678 N_Subprogram_Renaming_Declaration
3680 Error_Msg_Sloc := Sloc (Def_Id);
3682 ("cannot import&, renaming already provided for " &
3683 "declaration #", N, Def_Id);
3687 Set_Has_Completion (Def_Id);
3688 Process_Interface_Name (Def_Id, Arg3, Arg4);
3691 if Is_Compilation_Unit (Hom_Id) then
3693 -- Its possible homonyms are not affected by the pragma.
3694 -- Such homonyms might be present in the context of other
3695 -- units being compiled.
3700 Hom_Id := Homonym (Hom_Id);
3704 -- When the convention is Java or CIL, we also allow Import to be
3705 -- given for packages, generic packages, exceptions, record
3706 -- components, and access to subprograms.
3708 elsif (C = Convention_Java or else C = Convention_CIL)
3710 (Is_Package_Or_Generic_Package (Def_Id)
3711 or else Ekind (Def_Id) = E_Exception
3712 or else Ekind (Def_Id) = E_Access_Subprogram_Type
3713 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3715 Set_Imported (Def_Id);
3716 Set_Is_Public (Def_Id);
3717 Process_Interface_Name (Def_Id, Arg3, Arg4);
3719 -- Import a CPP class
3721 elsif Is_Record_Type (Def_Id)
3722 and then C = Convention_CPP
3724 -- Types treated as CPP classes are treated as limited, but we
3725 -- don't require them to be declared this way. A warning is
3726 -- issued to encourage the user to declare them as limited.
3727 -- This is not an error, for compatibility reasons, because
3728 -- these types have been supported this way for some time.
3730 if not Is_Limited_Type (Def_Id) then
3732 ("imported 'C'P'P type should be " &
3733 "explicitly declared limited?",
3734 Get_Pragma_Arg (Arg2));
3736 ("\type will be considered limited",
3737 Get_Pragma_Arg (Arg2));
3740 Set_Is_CPP_Class (Def_Id);
3741 Set_Is_Limited_Record (Def_Id);
3743 -- Imported CPP types must not have discriminants (because C++
3744 -- classes do not have discriminants).
3746 if Has_Discriminants (Def_Id) then
3748 ("imported 'C'P'P type cannot have discriminants",
3749 First (Discriminant_Specifications
3750 (Declaration_Node (Def_Id))));
3753 -- Components of imported CPP types must not have default
3754 -- expressions because the constructor (if any) is on the
3758 Tdef : constant Node_Id :=
3759 Type_Definition (Declaration_Node (Def_Id));
3764 if Nkind (Tdef) = N_Record_Definition then
3765 Clist := Component_List (Tdef);
3768 pragma Assert (Nkind (Tdef) = N_Derived_Type_Definition);
3769 Clist := Component_List (Record_Extension_Part (Tdef));
3772 if Present (Clist) then
3773 Comp := First (Component_Items (Clist));
3774 while Present (Comp) loop
3775 if Present (Expression (Comp)) then
3777 ("component of imported 'C'P'P type cannot have" &
3778 " default expression", Expression (Comp));
3788 ("second argument of pragma% must be object or subprogram",
3792 -- If this pragma applies to a compilation unit, then the unit, which
3793 -- is a subprogram, does not require (or allow) a body. We also do
3794 -- not need to elaborate imported procedures.
3796 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3798 Cunit : constant Node_Id := Parent (Parent (N));
3800 Set_Body_Required (Cunit, False);
3803 end Process_Import_Or_Interface;
3805 --------------------
3806 -- Process_Inline --
3807 --------------------
3809 procedure Process_Inline (Active : Boolean) is
3815 Effective : Boolean := False;
3817 procedure Make_Inline (Subp : Entity_Id);
3818 -- Subp is the defining unit name of the subprogram declaration. Set
3819 -- the flag, as well as the flag in the corresponding body, if there
3822 procedure Set_Inline_Flags (Subp : Entity_Id);
3823 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp and also
3824 -- Has_Pragma_Inline_Always for the Inline_Always case.
3826 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3827 -- Returns True if it can be determined at this stage that inlining
3828 -- is not possible, for example if the body is available and contains
3829 -- exception handlers, we prevent inlining, since otherwise we can
3830 -- get undefined symbols at link time. This function also emits a
3831 -- warning if front-end inlining is enabled and the pragma appears
3834 -- ??? is business with link symbols still valid, or does it relate
3835 -- to front end ZCX which is being phased out ???
3837 ---------------------------
3838 -- Inlining_Not_Possible --
3839 ---------------------------
3841 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3842 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3846 if Nkind (Decl) = N_Subprogram_Body then
3847 Stats := Handled_Statement_Sequence (Decl);
3848 return Present (Exception_Handlers (Stats))
3849 or else Present (At_End_Proc (Stats));
3851 elsif Nkind (Decl) = N_Subprogram_Declaration
3852 and then Present (Corresponding_Body (Decl))
3854 if Front_End_Inlining
3855 and then Analyzed (Corresponding_Body (Decl))
3857 Error_Msg_N ("pragma appears too late, ignored?", N);
3860 -- If the subprogram is a renaming as body, the body is just a
3861 -- call to the renamed subprogram, and inlining is trivially
3865 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
3866 N_Subprogram_Renaming_Declaration
3872 Handled_Statement_Sequence
3873 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3876 Present (Exception_Handlers (Stats))
3877 or else Present (At_End_Proc (Stats));
3881 -- If body is not available, assume the best, the check is
3882 -- performed again when compiling enclosing package bodies.
3886 end Inlining_Not_Possible;
3892 procedure Make_Inline (Subp : Entity_Id) is
3893 Kind : constant Entity_Kind := Ekind (Subp);
3894 Inner_Subp : Entity_Id := Subp;
3897 -- Ignore if bad type, avoid cascaded error
3899 if Etype (Subp) = Any_Type then
3903 -- Ignore if all inlining is suppressed
3905 elsif Suppress_All_Inlining then
3909 -- If inlining is not possible, for now do not treat as an error
3911 elsif Inlining_Not_Possible (Subp) then
3915 -- Here we have a candidate for inlining, but we must exclude
3916 -- derived operations. Otherwise we would end up trying to inline
3917 -- a phantom declaration, and the result would be to drag in a
3918 -- body which has no direct inlining associated with it. That
3919 -- would not only be inefficient but would also result in the
3920 -- backend doing cross-unit inlining in cases where it was
3921 -- definitely inappropriate to do so.
3923 -- However, a simple Comes_From_Source test is insufficient, since
3924 -- we do want to allow inlining of generic instances which also do
3925 -- not come from source. We also need to recognize specs generated
3926 -- by the front-end for bodies that carry the pragma. Finally,
3927 -- predefined operators do not come from source but are not
3928 -- inlineable either.
3930 elsif Is_Generic_Instance (Subp)
3931 or else Nkind (Parent (Parent (Subp))) = N_Subprogram_Declaration
3935 elsif not Comes_From_Source (Subp)
3936 and then Scope (Subp) /= Standard_Standard
3942 -- The referenced entity must either be the enclosing entity, or
3943 -- an entity declared within the current open scope.
3945 if Present (Scope (Subp))
3946 and then Scope (Subp) /= Current_Scope
3947 and then Subp /= Current_Scope
3950 ("argument of% must be entity in current scope", Assoc);
3954 -- Processing for procedure, operator or function. If subprogram
3955 -- is aliased (as for an instance) indicate that the renamed
3956 -- entity (if declared in the same unit) is inlined.
3958 if Is_Subprogram (Subp) then
3959 Inner_Subp := Ultimate_Alias (Inner_Subp);
3961 if In_Same_Source_Unit (Subp, Inner_Subp) then
3962 Set_Inline_Flags (Inner_Subp);
3964 Decl := Parent (Parent (Inner_Subp));
3966 if Nkind (Decl) = N_Subprogram_Declaration
3967 and then Present (Corresponding_Body (Decl))
3969 Set_Inline_Flags (Corresponding_Body (Decl));
3971 elsif Is_Generic_Instance (Subp) then
3973 -- Indicate that the body needs to be created for
3974 -- inlining subsequent calls. The instantiation node
3975 -- follows the declaration of the wrapper package
3978 if Scope (Subp) /= Standard_Standard
3980 Need_Subprogram_Instance_Body
3981 (Next (Unit_Declaration_Node (Scope (Alias (Subp)))),
3991 -- For a generic subprogram set flag as well, for use at the point
3992 -- of instantiation, to determine whether the body should be
3995 elsif Is_Generic_Subprogram (Subp) then
3996 Set_Inline_Flags (Subp);
3999 -- Literals are by definition inlined
4001 elsif Kind = E_Enumeration_Literal then
4004 -- Anything else is an error
4008 ("expect subprogram name for pragma%", Assoc);
4012 ----------------------
4013 -- Set_Inline_Flags --
4014 ----------------------
4016 procedure Set_Inline_Flags (Subp : Entity_Id) is
4019 Set_Is_Inlined (Subp, True);
4022 if not Has_Pragma_Inline (Subp) then
4023 Set_Has_Pragma_Inline (Subp);
4027 if Prag_Id = Pragma_Inline_Always then
4028 Set_Has_Pragma_Inline_Always (Subp);
4030 end Set_Inline_Flags;
4032 -- Start of processing for Process_Inline
4035 Check_No_Identifiers;
4036 Check_At_Least_N_Arguments (1);
4039 Inline_Processing_Required := True;
4043 while Present (Assoc) loop
4044 Subp_Id := Expression (Assoc);
4048 if Is_Entity_Name (Subp_Id) then
4049 Subp := Entity (Subp_Id);
4051 if Subp = Any_Id then
4053 -- If previous error, avoid cascaded errors
4061 while Present (Homonym (Subp))
4062 and then Scope (Homonym (Subp)) = Current_Scope
4064 Make_Inline (Homonym (Subp));
4065 Subp := Homonym (Subp);
4072 ("inappropriate argument for pragma%", Assoc);
4075 and then Warn_On_Redundant_Constructs
4076 and then not Suppress_All_Inlining
4078 if Inlining_Not_Possible (Subp) then
4080 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
4083 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
4091 ----------------------------
4092 -- Process_Interface_Name --
4093 ----------------------------
4095 procedure Process_Interface_Name
4096 (Subprogram_Def : Entity_Id;
4102 String_Val : String_Id;
4104 procedure Check_Form_Of_Interface_Name
4106 Ext_Name_Case : Boolean);
4107 -- SN is a string literal node for an interface name. This routine
4108 -- performs some minimal checks that the name is reasonable. In
4109 -- particular that no spaces or other obviously incorrect characters
4110 -- appear. This is only a warning, since any characters are allowed.
4111 -- Ext_Name_Case is True for an External_Name, False for a Link_Name.
4113 ----------------------------------
4114 -- Check_Form_Of_Interface_Name --
4115 ----------------------------------
4117 procedure Check_Form_Of_Interface_Name
4119 Ext_Name_Case : Boolean)
4121 S : constant String_Id := Strval (Expr_Value_S (SN));
4122 SL : constant Nat := String_Length (S);
4127 Error_Msg_N ("interface name cannot be null string", SN);
4130 for J in 1 .. SL loop
4131 C := Get_String_Char (S, J);
4133 -- Look for dubious character and issue unconditional warning.
4134 -- Definitely dubious if not in character range.
4136 if not In_Character_Range (C)
4138 -- For all cases except CLI target,
4139 -- commas, spaces and slashes are dubious (in CLI, we use
4140 -- commas and backslashes in external names to specify
4141 -- assembly version and public key, while slashes and spaces
4142 -- can be used in names to mark nested classes and
4145 or else ((not Ext_Name_Case or else VM_Target /= CLI_Target)
4146 and then (Get_Character (C) = ','
4148 Get_Character (C) = '\'))
4149 or else (VM_Target /= CLI_Target
4150 and then (Get_Character (C) = ' '
4152 Get_Character (C) = '/'))
4155 ("?interface name contains illegal character",
4156 Sloc (SN) + Source_Ptr (J));
4159 end Check_Form_Of_Interface_Name;
4161 -- Start of processing for Process_Interface_Name
4164 if No (Link_Arg) then
4165 if No (Ext_Arg) then
4166 if VM_Target = CLI_Target
4167 and then Ekind (Subprogram_Def) = E_Package
4168 and then Nkind (Parent (Subprogram_Def)) =
4169 N_Package_Specification
4170 and then Present (Generic_Parent (Parent (Subprogram_Def)))
4175 (Generic_Parent (Parent (Subprogram_Def))));
4180 elsif Chars (Ext_Arg) = Name_Link_Name then
4182 Link_Nam := Expression (Ext_Arg);
4185 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
4186 Ext_Nam := Expression (Ext_Arg);
4191 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
4192 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
4193 Ext_Nam := Expression (Ext_Arg);
4194 Link_Nam := Expression (Link_Arg);
4197 -- Check expressions for external name and link name are static
4199 if Present (Ext_Nam) then
4200 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
4201 Check_Form_Of_Interface_Name (Ext_Nam, Ext_Name_Case => True);
4203 -- Verify that external name is not the name of a local entity,
4204 -- which would hide the imported one and could lead to run-time
4205 -- surprises. The problem can only arise for entities declared in
4206 -- a package body (otherwise the external name is fully qualified
4207 -- and will not conflict).
4215 if Prag_Id = Pragma_Import then
4216 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
4218 E := Entity_Id (Get_Name_Table_Info (Nam));
4220 if Nam /= Chars (Subprogram_Def)
4221 and then Present (E)
4222 and then not Is_Overloadable (E)
4223 and then Is_Immediately_Visible (E)
4224 and then not Is_Imported (E)
4225 and then Ekind (Scope (E)) = E_Package
4228 while Present (Par) loop
4229 if Nkind (Par) = N_Package_Body then
4230 Error_Msg_Sloc := Sloc (E);
4232 ("imported entity is hidden by & declared#",
4237 Par := Parent (Par);
4244 if Present (Link_Nam) then
4245 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
4246 Check_Form_Of_Interface_Name (Link_Nam, Ext_Name_Case => False);
4249 -- If there is no link name, just set the external name
4251 if No (Link_Nam) then
4252 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
4254 -- For the Link_Name case, the given literal is preceded by an
4255 -- asterisk, which indicates to GCC that the given name should be
4256 -- taken literally, and in particular that no prepending of
4257 -- underlines should occur, even in systems where this is the
4263 if VM_Target = No_VM then
4264 Store_String_Char (Get_Char_Code ('*'));
4267 String_Val := Strval (Expr_Value_S (Link_Nam));
4268 Store_String_Chars (String_Val);
4270 Make_String_Literal (Sloc (Link_Nam),
4271 Strval => End_String);
4274 Set_Encoded_Interface_Name
4275 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
4277 -- We allow duplicated export names in CIL, as they are always
4278 -- enclosed in a namespace that differentiates them, and overloaded
4279 -- entities are supported by the VM.
4281 if Convention (Subprogram_Def) /= Convention_CIL then
4282 Check_Duplicated_Export_Name (Link_Nam);
4284 end Process_Interface_Name;
4286 -----------------------------------------
4287 -- Process_Interrupt_Or_Attach_Handler --
4288 -----------------------------------------
4290 procedure Process_Interrupt_Or_Attach_Handler is
4291 Arg1_X : constant Node_Id := Expression (Arg1);
4292 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
4293 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
4296 Set_Is_Interrupt_Handler (Handler_Proc);
4298 -- If the pragma is not associated with a handler procedure within a
4299 -- protected type, then it must be for a nonprotected procedure for
4300 -- the AAMP target, in which case we don't associate a representation
4301 -- item with the procedure's scope.
4303 if Ekind (Proc_Scope) = E_Protected_Type then
4304 if Prag_Id = Pragma_Interrupt_Handler
4306 Prag_Id = Pragma_Attach_Handler
4308 Record_Rep_Item (Proc_Scope, N);
4311 end Process_Interrupt_Or_Attach_Handler;
4313 --------------------------------------------------
4314 -- Process_Restrictions_Or_Restriction_Warnings --
4315 --------------------------------------------------
4317 -- Note: some of the simple identifier cases were handled in par-prag,
4318 -- but it is harmless (and more straightforward) to simply handle all
4319 -- cases here, even if it means we repeat a bit of work in some cases.
4321 procedure Process_Restrictions_Or_Restriction_Warnings
4325 R_Id : Restriction_Id;
4330 procedure Check_Unit_Name (N : Node_Id);
4331 -- Checks unit name parameter for No_Dependence. Returns if it has
4332 -- an appropriate form, otherwise raises pragma argument error.
4334 ---------------------
4335 -- Check_Unit_Name --
4336 ---------------------
4338 procedure Check_Unit_Name (N : Node_Id) is
4340 if Nkind (N) = N_Selected_Component then
4341 Check_Unit_Name (Prefix (N));
4342 Check_Unit_Name (Selector_Name (N));
4344 elsif Nkind (N) = N_Identifier then
4349 ("wrong form for unit name for No_Dependence", N);
4351 end Check_Unit_Name;
4353 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
4356 Check_Ada_83_Warning;
4357 Check_At_Least_N_Arguments (1);
4358 Check_Valid_Configuration_Pragma;
4361 while Present (Arg) loop
4363 Expr := Expression (Arg);
4365 -- Case of no restriction identifier present
4367 if Id = No_Name then
4368 if Nkind (Expr) /= N_Identifier then
4370 ("invalid form for restriction", Arg);
4375 (Process_Restriction_Synonyms (Expr));
4377 if R_Id not in All_Boolean_Restrictions then
4378 Error_Msg_Name_1 := Pname;
4380 ("invalid restriction identifier&", Get_Pragma_Arg (Arg));
4382 -- Check for possible misspelling
4384 for J in Restriction_Id loop
4386 Rnm : constant String := Restriction_Id'Image (J);
4389 Name_Buffer (1 .. Rnm'Length) := Rnm;
4390 Name_Len := Rnm'Length;
4391 Set_Casing (All_Lower_Case);
4393 if Is_Bad_Spelling_Of (Chars (Expr), Name_Enter) then
4395 (Identifier_Casing (Current_Source_File));
4396 Error_Msg_String (1 .. Rnm'Length) :=
4397 Name_Buffer (1 .. Name_Len);
4398 Error_Msg_Strlen := Rnm'Length;
4399 Error_Msg_N -- CODEFIX
4400 ("\possible misspelling of ""~""",
4401 Get_Pragma_Arg (Arg));
4410 if Implementation_Restriction (R_Id) then
4411 Check_Restriction (No_Implementation_Restrictions, Arg);
4414 -- If this is a warning, then set the warning unless we already
4415 -- have a real restriction active (we never want a warning to
4416 -- override a real restriction).
4419 if not Restriction_Active (R_Id) then
4420 Set_Restriction (R_Id, N);
4421 Restriction_Warnings (R_Id) := True;
4424 -- If real restriction case, then set it and make sure that the
4425 -- restriction warning flag is off, since a real restriction
4426 -- always overrides a warning.
4429 Set_Restriction (R_Id, N);
4430 Restriction_Warnings (R_Id) := False;
4433 -- Check for obsolescent restrictions in Ada 2005 mode
4436 and then Ada_Version >= Ada_2005
4437 and then (R_Id = No_Asynchronous_Control
4439 R_Id = No_Unchecked_Deallocation
4441 R_Id = No_Unchecked_Conversion)
4443 Check_Restriction (No_Obsolescent_Features, N);
4446 -- A very special case that must be processed here: pragma
4447 -- Restrictions (No_Exceptions) turns off all run-time
4448 -- checking. This is a bit dubious in terms of the formal
4449 -- language definition, but it is what is intended by RM
4450 -- H.4(12). Restriction_Warnings never affects generated code
4451 -- so this is done only in the real restriction case.
4453 if R_Id = No_Exceptions and then not Warn then
4454 Scope_Suppress := (others => True);
4457 -- Case of No_Dependence => unit-name. Note that the parser
4458 -- already made the necessary entry in the No_Dependence table.
4460 elsif Id = Name_No_Dependence then
4461 Check_Unit_Name (Expr);
4463 -- All other cases of restriction identifier present
4466 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
4467 Analyze_And_Resolve (Expr, Any_Integer);
4469 if R_Id not in All_Parameter_Restrictions then
4471 ("invalid restriction parameter identifier", Arg);
4473 elsif not Is_OK_Static_Expression (Expr) then
4474 Flag_Non_Static_Expr
4475 ("value must be static expression!", Expr);
4478 elsif not Is_Integer_Type (Etype (Expr))
4479 or else Expr_Value (Expr) < 0
4482 ("value must be non-negative integer", Arg);
4485 -- Restriction pragma is active
4487 Val := Expr_Value (Expr);
4489 if not UI_Is_In_Int_Range (Val) then
4491 ("pragma ignored, value too large?", Arg);
4494 -- Warning case. If the real restriction is active, then we
4495 -- ignore the request, since warning never overrides a real
4496 -- restriction. Otherwise we set the proper warning. Note that
4497 -- this circuit sets the warning again if it is already set,
4498 -- which is what we want, since the constant may have changed.
4501 if not Restriction_Active (R_Id) then
4503 (R_Id, N, Integer (UI_To_Int (Val)));
4504 Restriction_Warnings (R_Id) := True;
4507 -- Real restriction case, set restriction and make sure warning
4508 -- flag is off since real restriction always overrides warning.
4511 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
4512 Restriction_Warnings (R_Id) := False;
4518 end Process_Restrictions_Or_Restriction_Warnings;
4520 ---------------------------------
4521 -- Process_Suppress_Unsuppress --
4522 ---------------------------------
4524 -- Note: this procedure makes entries in the check suppress data
4525 -- structures managed by Sem. See spec of package Sem for full
4526 -- details on how we handle recording of check suppression.
4528 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
4533 In_Package_Spec : constant Boolean :=
4534 Is_Package_Or_Generic_Package (Current_Scope)
4535 and then not In_Package_Body (Current_Scope);
4537 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
4538 -- Used to suppress a single check on the given entity
4540 --------------------------------
4541 -- Suppress_Unsuppress_Echeck --
4542 --------------------------------
4544 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
4546 Set_Checks_May_Be_Suppressed (E);
4548 if In_Package_Spec then
4549 Push_Global_Suppress_Stack_Entry
4552 Suppress => Suppress_Case);
4555 Push_Local_Suppress_Stack_Entry
4558 Suppress => Suppress_Case);
4561 -- If this is a first subtype, and the base type is distinct,
4562 -- then also set the suppress flags on the base type.
4564 if Is_First_Subtype (E)
4565 and then Etype (E) /= E
4567 Suppress_Unsuppress_Echeck (Etype (E), C);
4569 end Suppress_Unsuppress_Echeck;
4571 -- Start of processing for Process_Suppress_Unsuppress
4574 -- Suppress/Unsuppress can appear as a configuration pragma, or in a
4575 -- declarative part or a package spec (RM 11.5(5)).
4577 if not Is_Configuration_Pragma then
4578 Check_Is_In_Decl_Part_Or_Package_Spec;
4581 Check_At_Least_N_Arguments (1);
4582 Check_At_Most_N_Arguments (2);
4583 Check_No_Identifier (Arg1);
4584 Check_Arg_Is_Identifier (Arg1);
4586 C := Get_Check_Id (Chars (Expression (Arg1)));
4588 if C = No_Check_Id then
4590 ("argument of pragma% is not valid check name", Arg1);
4593 if not Suppress_Case
4594 and then (C = All_Checks or else C = Overflow_Check)
4596 Opt.Overflow_Checks_Unsuppressed := True;
4599 if Arg_Count = 1 then
4601 -- Make an entry in the local scope suppress table. This is the
4602 -- table that directly shows the current value of the scope
4603 -- suppress check for any check id value.
4605 if C = All_Checks then
4607 -- For All_Checks, we set all specific predefined checks with
4608 -- the exception of Elaboration_Check, which is handled
4609 -- specially because of not wanting All_Checks to have the
4610 -- effect of deactivating static elaboration order processing.
4612 for J in Scope_Suppress'Range loop
4613 if J /= Elaboration_Check then
4614 Scope_Suppress (J) := Suppress_Case;
4618 -- If not All_Checks, and predefined check, then set appropriate
4619 -- scope entry. Note that we will set Elaboration_Check if this
4620 -- is explicitly specified.
4622 elsif C in Predefined_Check_Id then
4623 Scope_Suppress (C) := Suppress_Case;
4626 -- Also make an entry in the Local_Entity_Suppress table
4628 Push_Local_Suppress_Stack_Entry
4631 Suppress => Suppress_Case);
4633 -- Case of two arguments present, where the check is suppressed for
4634 -- a specified entity (given as the second argument of the pragma)
4637 -- This is obsolescent in Ada 2005 mode
4639 if Ada_Version >= Ada_2005 then
4640 Check_Restriction (No_Obsolescent_Features, Arg2);
4643 Check_Optional_Identifier (Arg2, Name_On);
4644 E_Id := Expression (Arg2);
4647 if not Is_Entity_Name (E_Id) then
4649 ("second argument of pragma% must be entity name", Arg2);
4658 -- Enforce RM 11.5(7) which requires that for a pragma that
4659 -- appears within a package spec, the named entity must be
4660 -- within the package spec. We allow the package name itself
4661 -- to be mentioned since that makes sense, although it is not
4662 -- strictly allowed by 11.5(7).
4665 and then E /= Current_Scope
4666 and then Scope (E) /= Current_Scope
4669 ("entity in pragma% is not in package spec (RM 11.5(7))",
4673 -- Loop through homonyms. As noted below, in the case of a package
4674 -- spec, only homonyms within the package spec are considered.
4677 Suppress_Unsuppress_Echeck (E, C);
4679 if Is_Generic_Instance (E)
4680 and then Is_Subprogram (E)
4681 and then Present (Alias (E))
4683 Suppress_Unsuppress_Echeck (Alias (E), C);
4686 -- Move to next homonym
4691 -- If we are within a package specification, the pragma only
4692 -- applies to homonyms in the same scope.
4694 exit when In_Package_Spec
4695 and then Scope (E) /= Current_Scope;
4698 end Process_Suppress_Unsuppress;
4704 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
4706 if Is_Imported (E) then
4708 ("cannot export entity& that was previously imported", Arg);
4710 elsif Present (Address_Clause (E)) then
4712 ("cannot export entity& that has an address clause", Arg);
4715 Set_Is_Exported (E);
4717 -- Generate a reference for entity explicitly, because the
4718 -- identifier may be overloaded and name resolution will not
4721 Generate_Reference (E, Arg);
4723 -- Deal with exporting non-library level entity
4725 if not Is_Library_Level_Entity (E) then
4727 -- Not allowed at all for subprograms
4729 if Is_Subprogram (E) then
4730 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
4732 -- Otherwise set public and statically allocated
4736 Set_Is_Statically_Allocated (E);
4738 -- Warn if the corresponding W flag is set and the pragma comes
4739 -- from source. The latter may not be true e.g. on VMS where we
4740 -- expand export pragmas for exception codes associated with
4741 -- imported or exported exceptions. We do not want to generate
4742 -- a warning for something that the user did not write.
4744 if Warn_On_Export_Import
4745 and then Comes_From_Source (Arg)
4748 ("?& has been made static as a result of Export", Arg, E);
4750 ("\this usage is non-standard and non-portable", Arg);
4755 if Warn_On_Export_Import and then Is_Type (E) then
4756 Error_Msg_NE ("exporting a type has no effect?", Arg, E);
4759 if Warn_On_Export_Import and Inside_A_Generic then
4761 ("all instances of& will have the same external name?", Arg, E);
4765 ----------------------------------------------
4766 -- Set_Extended_Import_Export_External_Name --
4767 ----------------------------------------------
4769 procedure Set_Extended_Import_Export_External_Name
4770 (Internal_Ent : Entity_Id;
4771 Arg_External : Node_Id)
4773 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
4777 if No (Arg_External) then
4781 Check_Arg_Is_External_Name (Arg_External);
4783 if Nkind (Arg_External) = N_String_Literal then
4784 if String_Length (Strval (Arg_External)) = 0 then
4787 New_Name := Adjust_External_Name_Case (Arg_External);
4790 elsif Nkind (Arg_External) = N_Identifier then
4791 New_Name := Get_Default_External_Name (Arg_External);
4793 -- Check_Arg_Is_External_Name should let through only identifiers and
4794 -- string literals or static string expressions (which are folded to
4795 -- string literals).
4798 raise Program_Error;
4801 -- If we already have an external name set (by a prior normal Import
4802 -- or Export pragma), then the external names must match
4804 if Present (Interface_Name (Internal_Ent)) then
4805 Check_Matching_Internal_Names : declare
4806 S1 : constant String_Id := Strval (Old_Name);
4807 S2 : constant String_Id := Strval (New_Name);
4810 -- Called if names do not match
4816 procedure Mismatch is
4818 Error_Msg_Sloc := Sloc (Old_Name);
4820 ("external name does not match that given #",
4824 -- Start of processing for Check_Matching_Internal_Names
4827 if String_Length (S1) /= String_Length (S2) then
4831 for J in 1 .. String_Length (S1) loop
4832 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
4837 end Check_Matching_Internal_Names;
4839 -- Otherwise set the given name
4842 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
4843 Check_Duplicated_Export_Name (New_Name);
4845 end Set_Extended_Import_Export_External_Name;
4851 procedure Set_Imported (E : Entity_Id) is
4853 -- Error message if already imported or exported
4855 if Is_Exported (E) or else Is_Imported (E) then
4857 -- Error if being set Exported twice
4859 if Is_Exported (E) then
4860 Error_Msg_NE ("entity& was previously exported", N, E);
4862 -- OK if Import/Interface case
4864 elsif Import_Interface_Present (N) then
4867 -- Error if being set Imported twice
4870 Error_Msg_NE ("entity& was previously imported", N, E);
4873 Error_Msg_Name_1 := Pname;
4875 ("\(pragma% applies to all previous entities)", N);
4877 Error_Msg_Sloc := Sloc (E);
4878 Error_Msg_NE ("\import not allowed for& declared#", N, E);
4880 -- Here if not previously imported or exported, OK to import
4883 Set_Is_Imported (E);
4885 -- If the entity is an object that is not at the library level,
4886 -- then it is statically allocated. We do not worry about objects
4887 -- with address clauses in this context since they are not really
4888 -- imported in the linker sense.
4891 and then not Is_Library_Level_Entity (E)
4892 and then No (Address_Clause (E))
4894 Set_Is_Statically_Allocated (E);
4901 -------------------------
4902 -- Set_Mechanism_Value --
4903 -------------------------
4905 -- Note: the mechanism name has not been analyzed (and cannot indeed be
4906 -- analyzed, since it is semantic nonsense), so we get it in the exact
4907 -- form created by the parser.
4909 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
4912 Mech_Name_Id : Name_Id;
4914 procedure Bad_Class;
4915 -- Signal bad descriptor class name
4917 procedure Bad_Mechanism;
4918 -- Signal bad mechanism name
4924 procedure Bad_Class is
4926 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
4929 -------------------------
4930 -- Bad_Mechanism_Value --
4931 -------------------------
4933 procedure Bad_Mechanism is
4935 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
4938 -- Start of processing for Set_Mechanism_Value
4941 if Mechanism (Ent) /= Default_Mechanism then
4943 ("mechanism for & has already been set", Mech_Name, Ent);
4946 -- MECHANISM_NAME ::= value | reference | descriptor |
4949 if Nkind (Mech_Name) = N_Identifier then
4950 if Chars (Mech_Name) = Name_Value then
4951 Set_Mechanism (Ent, By_Copy);
4954 elsif Chars (Mech_Name) = Name_Reference then
4955 Set_Mechanism (Ent, By_Reference);
4958 elsif Chars (Mech_Name) = Name_Descriptor then
4959 Check_VMS (Mech_Name);
4960 Set_Mechanism (Ent, By_Descriptor);
4963 elsif Chars (Mech_Name) = Name_Short_Descriptor then
4964 Check_VMS (Mech_Name);
4965 Set_Mechanism (Ent, By_Short_Descriptor);
4968 elsif Chars (Mech_Name) = Name_Copy then
4970 ("bad mechanism name, Value assumed", Mech_Name);
4976 -- MECHANISM_NAME ::= descriptor (CLASS_NAME) |
4977 -- short_descriptor (CLASS_NAME)
4978 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4980 -- Note: this form is parsed as an indexed component
4982 elsif Nkind (Mech_Name) = N_Indexed_Component then
4984 Class := First (Expressions (Mech_Name));
4986 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4987 or else not (Chars (Prefix (Mech_Name)) = Name_Descriptor or else
4988 Chars (Prefix (Mech_Name)) = Name_Short_Descriptor)
4989 or else Present (Next (Class))
4993 Mech_Name_Id := Chars (Prefix (Mech_Name));
4996 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME) |
4997 -- short_descriptor (Class => CLASS_NAME)
4998 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5000 -- Note: this form is parsed as a function call
5002 elsif Nkind (Mech_Name) = N_Function_Call then
5004 Param := First (Parameter_Associations (Mech_Name));
5006 if Nkind (Name (Mech_Name)) /= N_Identifier
5007 or else not (Chars (Name (Mech_Name)) = Name_Descriptor or else
5008 Chars (Name (Mech_Name)) = Name_Short_Descriptor)
5009 or else Present (Next (Param))
5010 or else No (Selector_Name (Param))
5011 or else Chars (Selector_Name (Param)) /= Name_Class
5015 Class := Explicit_Actual_Parameter (Param);
5016 Mech_Name_Id := Chars (Name (Mech_Name));
5023 -- Fall through here with Class set to descriptor class name
5025 Check_VMS (Mech_Name);
5027 if Nkind (Class) /= N_Identifier then
5030 elsif Mech_Name_Id = Name_Descriptor
5031 and then Chars (Class) = Name_UBS
5033 Set_Mechanism (Ent, By_Descriptor_UBS);
5035 elsif Mech_Name_Id = Name_Descriptor
5036 and then Chars (Class) = Name_UBSB
5038 Set_Mechanism (Ent, By_Descriptor_UBSB);
5040 elsif Mech_Name_Id = Name_Descriptor
5041 and then Chars (Class) = Name_UBA
5043 Set_Mechanism (Ent, By_Descriptor_UBA);
5045 elsif Mech_Name_Id = Name_Descriptor
5046 and then Chars (Class) = Name_S
5048 Set_Mechanism (Ent, By_Descriptor_S);
5050 elsif Mech_Name_Id = Name_Descriptor
5051 and then Chars (Class) = Name_SB
5053 Set_Mechanism (Ent, By_Descriptor_SB);
5055 elsif Mech_Name_Id = Name_Descriptor
5056 and then Chars (Class) = Name_A
5058 Set_Mechanism (Ent, By_Descriptor_A);
5060 elsif Mech_Name_Id = Name_Descriptor
5061 and then Chars (Class) = Name_NCA
5063 Set_Mechanism (Ent, By_Descriptor_NCA);
5065 elsif Mech_Name_Id = Name_Short_Descriptor
5066 and then Chars (Class) = Name_UBS
5068 Set_Mechanism (Ent, By_Short_Descriptor_UBS);
5070 elsif Mech_Name_Id = Name_Short_Descriptor
5071 and then Chars (Class) = Name_UBSB
5073 Set_Mechanism (Ent, By_Short_Descriptor_UBSB);
5075 elsif Mech_Name_Id = Name_Short_Descriptor
5076 and then Chars (Class) = Name_UBA
5078 Set_Mechanism (Ent, By_Short_Descriptor_UBA);
5080 elsif Mech_Name_Id = Name_Short_Descriptor
5081 and then Chars (Class) = Name_S
5083 Set_Mechanism (Ent, By_Short_Descriptor_S);
5085 elsif Mech_Name_Id = Name_Short_Descriptor
5086 and then Chars (Class) = Name_SB
5088 Set_Mechanism (Ent, By_Short_Descriptor_SB);
5090 elsif Mech_Name_Id = Name_Short_Descriptor
5091 and then Chars (Class) = Name_A
5093 Set_Mechanism (Ent, By_Short_Descriptor_A);
5095 elsif Mech_Name_Id = Name_Short_Descriptor
5096 and then Chars (Class) = Name_NCA
5098 Set_Mechanism (Ent, By_Short_Descriptor_NCA);
5103 end Set_Mechanism_Value;
5105 ---------------------------
5106 -- Set_Ravenscar_Profile --
5107 ---------------------------
5109 -- The tasks to be done here are
5111 -- Set required policies
5113 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
5114 -- pragma Locking_Policy (Ceiling_Locking)
5116 -- Set Detect_Blocking mode
5118 -- Set required restrictions (see System.Rident for detailed list)
5120 procedure Set_Ravenscar_Profile (N : Node_Id) is
5122 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
5124 if Task_Dispatching_Policy /= ' '
5125 and then Task_Dispatching_Policy /= 'F'
5127 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
5128 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
5130 -- Set the FIFO_Within_Priorities policy, but always preserve
5131 -- System_Location since we like the error message with the run time
5135 Task_Dispatching_Policy := 'F';
5137 if Task_Dispatching_Policy_Sloc /= System_Location then
5138 Task_Dispatching_Policy_Sloc := Loc;
5142 -- pragma Locking_Policy (Ceiling_Locking)
5144 if Locking_Policy /= ' '
5145 and then Locking_Policy /= 'C'
5147 Error_Msg_Sloc := Locking_Policy_Sloc;
5148 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
5150 -- Set the Ceiling_Locking policy, but preserve System_Location since
5151 -- we like the error message with the run time name.
5154 Locking_Policy := 'C';
5156 if Locking_Policy_Sloc /= System_Location then
5157 Locking_Policy_Sloc := Loc;
5161 -- pragma Detect_Blocking
5163 Detect_Blocking := True;
5165 -- Set the corresponding restrictions
5167 Set_Profile_Restrictions
5168 (Ravenscar, N, Warn => Treat_Restrictions_As_Warnings);
5169 end Set_Ravenscar_Profile;
5171 -- Start of processing for Analyze_Pragma
5174 -- Deal with unrecognized pragma
5176 if not Is_Pragma_Name (Pname) then
5177 if Warn_On_Unrecognized_Pragma then
5178 Error_Msg_Name_1 := Pname;
5179 Error_Msg_N ("?unrecognized pragma%!", Pragma_Identifier (N));
5181 for PN in First_Pragma_Name .. Last_Pragma_Name loop
5182 if Is_Bad_Spelling_Of (Pname, PN) then
5183 Error_Msg_Name_1 := PN;
5184 Error_Msg_N -- CODEFIX
5185 ("\?possible misspelling of %!", Pragma_Identifier (N));
5194 -- Here to start processing for recognized pragma
5196 Prag_Id := Get_Pragma_Id (Pname);
5205 if Present (Pragma_Argument_Associations (N)) then
5206 Arg1 := First (Pragma_Argument_Associations (N));
5208 if Present (Arg1) then
5209 Arg2 := Next (Arg1);
5211 if Present (Arg2) then
5212 Arg3 := Next (Arg2);
5214 if Present (Arg3) then
5215 Arg4 := Next (Arg3);
5221 -- Count number of arguments
5228 while Present (Arg_Node) loop
5229 Arg_Count := Arg_Count + 1;
5234 -- An enumeration type defines the pragmas that are supported by the
5235 -- implementation. Get_Pragma_Id (in package Prag) transforms a name
5236 -- into the corresponding enumeration value for the following case.
5244 -- pragma Abort_Defer;
5246 when Pragma_Abort_Defer =>
5248 Check_Arg_Count (0);
5250 -- The only required semantic processing is to check the
5251 -- placement. This pragma must appear at the start of the
5252 -- statement sequence of a handled sequence of statements.
5254 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
5255 or else N /= First (Statements (Parent (N)))
5266 -- Note: this pragma also has some specific processing in Par.Prag
5267 -- because we want to set the Ada version mode during parsing.
5269 when Pragma_Ada_83 =>
5271 Check_Arg_Count (0);
5273 -- We really should check unconditionally for proper configuration
5274 -- pragma placement, since we really don't want mixed Ada modes
5275 -- within a single unit, and the GNAT reference manual has always
5276 -- said this was a configuration pragma, but we did not check and
5277 -- are hesitant to add the check now.
5279 -- However, we really cannot tolerate mixing Ada 2005 or Ada 2012
5280 -- with Ada 83 or Ada 95, so we must check if we are in Ada 2005
5281 -- or Ada 2012 mode.
5283 if Ada_Version >= Ada_05 then
5284 Check_Valid_Configuration_Pragma;
5287 -- Now set Ada 83 mode
5289 Ada_Version := Ada_83;
5290 Ada_Version_Explicit := Ada_Version;
5298 -- Note: this pragma also has some specific processing in Par.Prag
5299 -- because we want to set the Ada 83 version mode during parsing.
5301 when Pragma_Ada_95 =>
5303 Check_Arg_Count (0);
5305 -- We really should check unconditionally for proper configuration
5306 -- pragma placement, since we really don't want mixed Ada modes
5307 -- within a single unit, and the GNAT reference manual has always
5308 -- said this was a configuration pragma, but we did not check and
5309 -- are hesitant to add the check now.
5311 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
5312 -- or Ada 95, so we must check if we are in Ada 2005 mode.
5314 if Ada_Version >= Ada_05 then
5315 Check_Valid_Configuration_Pragma;
5318 -- Now set Ada 95 mode
5320 Ada_Version := Ada_95;
5321 Ada_Version_Explicit := Ada_Version;
5323 ---------------------
5324 -- Ada_05/Ada_2005 --
5325 ---------------------
5328 -- pragma Ada_05 (LOCAL_NAME);
5331 -- pragma Ada_2005 (LOCAL_NAME):
5333 -- Note: these pragma also have some specific processing in Par.Prag
5334 -- because we want to set the Ada 2005 version mode during parsing.
5336 when Pragma_Ada_05 | Pragma_Ada_2005 => declare
5342 if Arg_Count = 1 then
5343 Check_Arg_Is_Local_Name (Arg1);
5344 E_Id := Expression (Arg1);
5346 if Etype (E_Id) = Any_Type then
5350 Set_Is_Ada_2005_Only (Entity (E_Id));
5353 Check_Arg_Count (0);
5355 -- For Ada_2005 we unconditionally enforce the documented
5356 -- configuration pragma placement, since we do not want to
5357 -- tolerate mixed modes in a unit involving Ada 2005. That
5358 -- would cause real difficulties for those cases where there
5359 -- are incompatibilities between Ada 95 and Ada 2005.
5361 Check_Valid_Configuration_Pragma;
5363 -- Now set Ada 2005 mode
5365 Ada_Version := Ada_05;
5366 Ada_Version_Explicit := Ada_05;
5370 ---------------------
5371 -- Ada_12/Ada_2012 --
5372 ---------------------
5377 -- Note: these pragma also have some specific processing in Par.Prag
5378 -- because we want to set the Ada 2012 version mode during parsing.
5380 when Pragma_Ada_12 | Pragma_Ada_2012 =>
5382 Check_Arg_Count (0);
5384 -- For Ada_2012 we unconditionally enforce the documented
5385 -- configuration pragma placement, since we do not want to
5386 -- tolerate mixed modes in a unit involving Ada 2012. That would
5387 -- cause real difficulties for those cases where there are
5388 -- incompatibilities between Ada 95 and Ada 2005/Ada 2012.
5390 Check_Valid_Configuration_Pragma;
5392 -- Now set Ada 2012 mode
5394 Ada_Version := Ada_12;
5395 Ada_Version_Explicit := Ada_12;
5397 ----------------------
5398 -- All_Calls_Remote --
5399 ----------------------
5401 -- pragma All_Calls_Remote [(library_package_NAME)];
5403 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
5404 Lib_Entity : Entity_Id;
5407 Check_Ada_83_Warning;
5408 Check_Valid_Library_Unit_Pragma;
5410 if Nkind (N) = N_Null_Statement then
5414 Lib_Entity := Find_Lib_Unit_Name;
5416 -- This pragma should only apply to a RCI unit (RM E.2.3(23))
5418 if Present (Lib_Entity)
5419 and then not Debug_Flag_U
5421 if not Is_Remote_Call_Interface (Lib_Entity) then
5422 Error_Pragma ("pragma% only apply to rci unit");
5424 -- Set flag for entity of the library unit
5427 Set_Has_All_Calls_Remote (Lib_Entity);
5431 end All_Calls_Remote;
5437 -- pragma Annotate (IDENTIFIER [, IDENTIFIER {, ARG}]);
5438 -- ARG ::= NAME | EXPRESSION
5440 -- The first two arguments are by convention intended to refer to an
5441 -- external tool and a tool-specific function. These arguments are
5444 when Pragma_Annotate => Annotate : begin
5446 Check_At_Least_N_Arguments (1);
5447 Check_Arg_Is_Identifier (Arg1);
5448 Check_No_Identifiers;
5456 -- Second unanalyzed parameter is optional
5462 while Present (Arg) loop
5463 Exp := Expression (Arg);
5466 if Is_Entity_Name (Exp) then
5469 -- For string literals, we assume Standard_String as the
5470 -- type, unless the string contains wide or wide_wide
5473 elsif Nkind (Exp) = N_String_Literal then
5474 if Has_Wide_Wide_Character (Exp) then
5475 Resolve (Exp, Standard_Wide_Wide_String);
5476 elsif Has_Wide_Character (Exp) then
5477 Resolve (Exp, Standard_Wide_String);
5479 Resolve (Exp, Standard_String);
5482 elsif Is_Overloaded (Exp) then
5484 ("ambiguous argument for pragma%", Exp);
5500 -- pragma Assert ([Check =>] Boolean_EXPRESSION
5501 -- [, [Message =>] Static_String_EXPRESSION]);
5503 when Pragma_Assert => Assert : declare
5509 Check_At_Least_N_Arguments (1);
5510 Check_At_Most_N_Arguments (2);
5511 Check_Arg_Order ((Name_Check, Name_Message));
5512 Check_Optional_Identifier (Arg1, Name_Check);
5514 -- We treat pragma Assert as equivalent to:
5516 -- pragma Check (Assertion, condition [, msg]);
5518 -- So rewrite pragma in this manner, and analyze the result
5520 Expr := Get_Pragma_Arg (Arg1);
5522 Make_Pragma_Argument_Association (Loc,
5524 Make_Identifier (Loc,
5525 Chars => Name_Assertion)),
5527 Make_Pragma_Argument_Association (Sloc (Expr),
5528 Expression => Expr));
5530 if Arg_Count > 1 then
5531 Check_Optional_Identifier (Arg2, Name_Message);
5532 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
5533 Append_To (Newa, Relocate_Node (Arg2));
5538 Chars => Name_Check,
5539 Pragma_Argument_Associations => Newa));
5543 ----------------------
5544 -- Assertion_Policy --
5545 ----------------------
5547 -- pragma Assertion_Policy (Check | Ignore)
5549 when Pragma_Assertion_Policy => Assertion_Policy : declare
5554 Check_Valid_Configuration_Pragma;
5555 Check_Arg_Count (1);
5556 Check_No_Identifiers;
5557 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
5559 -- We treat pragma Assertion_Policy as equivalent to:
5561 -- pragma Check_Policy (Assertion, policy)
5563 -- So rewrite the pragma in that manner and link on to the chain
5564 -- of Check_Policy pragmas, marking the pragma as analyzed.
5566 Policy := Get_Pragma_Arg (Arg1);
5570 Chars => Name_Check_Policy,
5572 Pragma_Argument_Associations => New_List (
5573 Make_Pragma_Argument_Association (Loc,
5575 Make_Identifier (Loc,
5576 Chars => Name_Assertion)),
5578 Make_Pragma_Argument_Association (Loc,
5580 Make_Identifier (Sloc (Policy),
5581 Chars => Chars (Policy))))));
5584 Set_Next_Pragma (N, Opt.Check_Policy_List);
5585 Opt.Check_Policy_List := N;
5586 end Assertion_Policy;
5588 ------------------------------
5589 -- Assume_No_Invalid_Values --
5590 ------------------------------
5592 -- pragma Assume_No_Invalid_Values (On | Off);
5594 when Pragma_Assume_No_Invalid_Values =>
5596 Check_Valid_Configuration_Pragma;
5597 Check_Arg_Count (1);
5598 Check_No_Identifiers;
5599 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5601 if Chars (Expression (Arg1)) = Name_On then
5602 Assume_No_Invalid_Values := True;
5604 Assume_No_Invalid_Values := False;
5611 -- pragma AST_Entry (entry_IDENTIFIER);
5613 when Pragma_AST_Entry => AST_Entry : declare
5619 Check_Arg_Count (1);
5620 Check_No_Identifiers;
5621 Check_Arg_Is_Local_Name (Arg1);
5622 Ent := Entity (Expression (Arg1));
5624 -- Note: the implementation of the AST_Entry pragma could handle
5625 -- the entry family case fine, but for now we are consistent with
5626 -- the DEC rules, and do not allow the pragma, which of course
5627 -- has the effect of also forbidding the attribute.
5629 if Ekind (Ent) /= E_Entry then
5631 ("pragma% argument must be simple entry name", Arg1);
5633 elsif Is_AST_Entry (Ent) then
5635 ("duplicate % pragma for entry", Arg1);
5637 elsif Has_Homonym (Ent) then
5639 ("pragma% argument cannot specify overloaded entry", Arg1);
5643 FF : constant Entity_Id := First_Formal (Ent);
5646 if Present (FF) then
5647 if Present (Next_Formal (FF)) then
5649 ("entry for pragma% can have only one argument",
5652 elsif Parameter_Mode (FF) /= E_In_Parameter then
5654 ("entry parameter for pragma% must have mode IN",
5660 Set_Is_AST_Entry (Ent);
5668 -- pragma Asynchronous (LOCAL_NAME);
5670 when Pragma_Asynchronous => Asynchronous : declare
5678 procedure Process_Async_Pragma;
5679 -- Common processing for procedure and access-to-procedure case
5681 --------------------------
5682 -- Process_Async_Pragma --
5683 --------------------------
5685 procedure Process_Async_Pragma is
5688 Set_Is_Asynchronous (Nm);
5692 -- The formals should be of mode IN (RM E.4.1(6))
5695 while Present (S) loop
5696 Formal := Defining_Identifier (S);
5698 if Nkind (Formal) = N_Defining_Identifier
5699 and then Ekind (Formal) /= E_In_Parameter
5702 ("pragma% procedure can only have IN parameter",
5709 Set_Is_Asynchronous (Nm);
5710 end Process_Async_Pragma;
5712 -- Start of processing for pragma Asynchronous
5715 Check_Ada_83_Warning;
5716 Check_No_Identifiers;
5717 Check_Arg_Count (1);
5718 Check_Arg_Is_Local_Name (Arg1);
5720 if Debug_Flag_U then
5724 C_Ent := Cunit_Entity (Current_Sem_Unit);
5725 Analyze (Expression (Arg1));
5726 Nm := Entity (Expression (Arg1));
5728 if not Is_Remote_Call_Interface (C_Ent)
5729 and then not Is_Remote_Types (C_Ent)
5731 -- This pragma should only appear in an RCI or Remote Types
5732 -- unit (RM E.4.1(4)).
5735 ("pragma% not in Remote_Call_Interface or " &
5736 "Remote_Types unit");
5739 if Ekind (Nm) = E_Procedure
5740 and then Nkind (Parent (Nm)) = N_Procedure_Specification
5742 if not Is_Remote_Call_Interface (Nm) then
5744 ("pragma% cannot be applied on non-remote procedure",
5748 L := Parameter_Specifications (Parent (Nm));
5749 Process_Async_Pragma;
5752 elsif Ekind (Nm) = E_Function then
5754 ("pragma% cannot be applied to function", Arg1);
5756 elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
5758 if Is_Record_Type (Nm) then
5760 -- A record type that is the Equivalent_Type for a remote
5761 -- access-to-subprogram type.
5763 N := Declaration_Node (Corresponding_Remote_Type (Nm));
5766 -- A non-expanded RAS type (distribution is not enabled)
5768 N := Declaration_Node (Nm);
5771 if Nkind (N) = N_Full_Type_Declaration
5772 and then Nkind (Type_Definition (N)) =
5773 N_Access_Procedure_Definition
5775 L := Parameter_Specifications (Type_Definition (N));
5776 Process_Async_Pragma;
5778 if Is_Asynchronous (Nm)
5779 and then Expander_Active
5780 and then Get_PCS_Name /= Name_No_DSA
5782 RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
5787 ("pragma% cannot reference access-to-function type",
5791 -- Only other possibility is Access-to-class-wide type
5793 elsif Is_Access_Type (Nm)
5794 and then Is_Class_Wide_Type (Designated_Type (Nm))
5796 Check_First_Subtype (Arg1);
5797 Set_Is_Asynchronous (Nm);
5798 if Expander_Active then
5799 RACW_Type_Is_Asynchronous (Nm);
5803 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
5811 -- pragma Atomic (LOCAL_NAME);
5813 when Pragma_Atomic =>
5814 Process_Atomic_Shared_Volatile;
5816 -----------------------
5817 -- Atomic_Components --
5818 -----------------------
5820 -- pragma Atomic_Components (array_LOCAL_NAME);
5822 -- This processing is shared by Volatile_Components
5824 when Pragma_Atomic_Components |
5825 Pragma_Volatile_Components =>
5827 Atomic_Components : declare
5834 Check_Ada_83_Warning;
5835 Check_No_Identifiers;
5836 Check_Arg_Count (1);
5837 Check_Arg_Is_Local_Name (Arg1);
5838 E_Id := Expression (Arg1);
5840 if Etype (E_Id) = Any_Type then
5846 if Rep_Item_Too_Early (E, N)
5848 Rep_Item_Too_Late (E, N)
5853 D := Declaration_Node (E);
5856 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
5858 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
5859 and then Nkind (D) = N_Object_Declaration
5860 and then Nkind (Object_Definition (D)) =
5861 N_Constrained_Array_Definition)
5863 -- The flag is set on the object, or on the base type
5865 if Nkind (D) /= N_Object_Declaration then
5869 Set_Has_Volatile_Components (E);
5871 if Prag_Id = Pragma_Atomic_Components then
5872 Set_Has_Atomic_Components (E);
5874 if Is_Packed (E) then
5875 Set_Is_Packed (E, False);
5878 ("?Pack canceled, cannot pack atomic components",
5884 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
5886 end Atomic_Components;
5888 --------------------
5889 -- Attach_Handler --
5890 --------------------
5892 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
5894 when Pragma_Attach_Handler =>
5895 Check_Ada_83_Warning;
5896 Check_No_Identifiers;
5897 Check_Arg_Count (2);
5899 if No_Run_Time_Mode then
5900 Error_Msg_CRT ("Attach_Handler pragma", N);
5902 Check_Interrupt_Or_Attach_Handler;
5904 -- The expression that designates the attribute may
5905 -- depend on a discriminant, and is therefore a per-
5906 -- object expression, to be expanded in the init proc.
5907 -- If expansion is enabled, perform semantic checks
5910 if Expander_Active then
5912 Temp : constant Node_Id :=
5913 New_Copy_Tree (Expression (Arg2));
5915 Set_Parent (Temp, N);
5916 Preanalyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
5920 Analyze (Expression (Arg2));
5921 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
5924 Process_Interrupt_Or_Attach_Handler;
5927 --------------------
5928 -- C_Pass_By_Copy --
5929 --------------------
5931 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
5933 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
5939 Check_Valid_Configuration_Pragma;
5940 Check_Arg_Count (1);
5941 Check_Optional_Identifier (Arg1, "max_size");
5943 Arg := Expression (Arg1);
5944 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
5946 Val := Expr_Value (Arg);
5950 ("maximum size for pragma% must be positive", Arg1);
5952 elsif UI_Is_In_Int_Range (Val) then
5953 Default_C_Record_Mechanism := UI_To_Int (Val);
5955 -- If a giant value is given, Int'Last will do well enough.
5956 -- If sometime someone complains that a record larger than
5957 -- two gigabytes is not copied, we will worry about it then!
5960 Default_C_Record_Mechanism := Mechanism_Type'Last;
5968 -- pragma Check ([Name =>] Identifier,
5969 -- [Check =>] Boolean_Expression
5970 -- [,[Message =>] String_Expression]);
5972 when Pragma_Check => Check : declare
5977 -- Set True if category of assertions referenced by Name enabled
5981 Check_At_Least_N_Arguments (2);
5982 Check_At_Most_N_Arguments (3);
5983 Check_Optional_Identifier (Arg1, Name_Name);
5984 Check_Optional_Identifier (Arg2, Name_Check);
5986 if Arg_Count = 3 then
5987 Check_Optional_Identifier (Arg3, Name_Message);
5988 Analyze_And_Resolve (Get_Pragma_Arg (Arg3), Standard_String);
5991 Check_Arg_Is_Identifier (Arg1);
5993 -- Indicate if pragma is enabled. The Original_Node reference here
5994 -- is to deal with pragma Assert rewritten as a Check pragma.
5996 Check_On := Check_Enabled (Chars (Get_Pragma_Arg (Arg1)));
5999 Set_Pragma_Enabled (N);
6000 Set_Pragma_Enabled (Original_Node (N));
6001 Set_SCO_Pragma_Enabled (Loc);
6004 -- If expansion is active and the check is not enabled then we
6005 -- rewrite the Check as:
6007 -- if False and then condition then
6011 -- The reason we do this rewriting during semantic analysis rather
6012 -- than as part of normal expansion is that we cannot analyze and
6013 -- expand the code for the boolean expression directly, or it may
6014 -- cause insertion of actions that would escape the attempt to
6015 -- suppress the check code.
6017 -- Note that the Sloc for the if statement corresponds to the
6018 -- argument condition, not the pragma itself. The reason for this
6019 -- is that we may generate a warning if the condition is False at
6020 -- compile time, and we do not want to delete this warning when we
6021 -- delete the if statement.
6023 Expr := Expression (Arg2);
6025 if Expander_Active and then not Check_On then
6026 Eloc := Sloc (Expr);
6029 Make_If_Statement (Eloc,
6031 Make_And_Then (Eloc,
6032 Left_Opnd => New_Occurrence_Of (Standard_False, Eloc),
6033 Right_Opnd => Expr),
6034 Then_Statements => New_List (
6035 Make_Null_Statement (Eloc))));
6042 Analyze_And_Resolve (Expr, Any_Boolean);
6050 -- pragma Check_Name (check_IDENTIFIER);
6052 when Pragma_Check_Name =>
6053 Check_No_Identifiers;
6055 Check_Valid_Configuration_Pragma;
6056 Check_Arg_Count (1);
6057 Check_Arg_Is_Identifier (Arg1);
6060 Nam : constant Name_Id := Chars (Expression (Arg1));
6063 for J in Check_Names.First .. Check_Names.Last loop
6064 if Check_Names.Table (J) = Nam then
6069 Check_Names.Append (Nam);
6076 -- pragma Check_Policy (
6077 -- [Name =>] IDENTIFIER,
6078 -- [Policy =>] POLICY_IDENTIFIER);
6080 -- POLICY_IDENTIFIER ::= ON | OFF | CHECK | IGNORE
6082 -- Note: this is a configuration pragma, but it is allowed to appear
6085 when Pragma_Check_Policy =>
6087 Check_Arg_Count (2);
6088 Check_Optional_Identifier (Arg1, Name_Name);
6089 Check_Optional_Identifier (Arg2, Name_Policy);
6091 (Arg2, Name_On, Name_Off, Name_Check, Name_Ignore);
6093 -- A Check_Policy pragma can appear either as a configuration
6094 -- pragma, or in a declarative part or a package spec (see RM
6095 -- 11.5(5) for rules for Suppress/Unsuppress which are also
6096 -- followed for Check_Policy).
6098 if not Is_Configuration_Pragma then
6099 Check_Is_In_Decl_Part_Or_Package_Spec;
6102 Set_Next_Pragma (N, Opt.Check_Policy_List);
6103 Opt.Check_Policy_List := N;
6105 ---------------------
6106 -- CIL_Constructor --
6107 ---------------------
6109 -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME);
6111 -- Processing for this pragma is shared with Java_Constructor
6117 -- pragma Comment (static_string_EXPRESSION)
6119 -- Processing for pragma Comment shares the circuitry for pragma
6120 -- Ident. The only differences are that Ident enforces a limit of 31
6121 -- characters on its argument, and also enforces limitations on
6122 -- placement for DEC compatibility. Pragma Comment shares neither of
6123 -- these restrictions.
6129 -- pragma Common_Object (
6130 -- [Internal =>] LOCAL_NAME
6131 -- [, [External =>] EXTERNAL_SYMBOL]
6132 -- [, [Size =>] EXTERNAL_SYMBOL]);
6134 -- Processing for this pragma is shared with Psect_Object
6136 ------------------------
6137 -- Compile_Time_Error --
6138 ------------------------
6140 -- pragma Compile_Time_Error
6141 -- (boolean_EXPRESSION, static_string_EXPRESSION);
6143 when Pragma_Compile_Time_Error =>
6145 Process_Compile_Time_Warning_Or_Error;
6147 --------------------------
6148 -- Compile_Time_Warning --
6149 --------------------------
6151 -- pragma Compile_Time_Warning
6152 -- (boolean_EXPRESSION, static_string_EXPRESSION);
6154 when Pragma_Compile_Time_Warning =>
6156 Process_Compile_Time_Warning_Or_Error;
6162 when Pragma_Compiler_Unit =>
6164 Check_Arg_Count (0);
6165 Set_Is_Compiler_Unit (Get_Source_Unit (N));
6167 -----------------------------
6168 -- Complete_Representation --
6169 -----------------------------
6171 -- pragma Complete_Representation;
6173 when Pragma_Complete_Representation =>
6175 Check_Arg_Count (0);
6177 if Nkind (Parent (N)) /= N_Record_Representation_Clause then
6179 ("pragma & must appear within record representation clause");
6182 ----------------------------
6183 -- Complex_Representation --
6184 ----------------------------
6186 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
6188 when Pragma_Complex_Representation => Complex_Representation : declare
6195 Check_Arg_Count (1);
6196 Check_Optional_Identifier (Arg1, Name_Entity);
6197 Check_Arg_Is_Local_Name (Arg1);
6198 E_Id := Expression (Arg1);
6200 if Etype (E_Id) = Any_Type then
6206 if not Is_Record_Type (E) then
6208 ("argument for pragma% must be record type", Arg1);
6211 Ent := First_Entity (E);
6214 or else No (Next_Entity (Ent))
6215 or else Present (Next_Entity (Next_Entity (Ent)))
6216 or else not Is_Floating_Point_Type (Etype (Ent))
6217 or else Etype (Ent) /= Etype (Next_Entity (Ent))
6220 ("record for pragma% must have two fields of the same "
6221 & "floating-point type", Arg1);
6224 Set_Has_Complex_Representation (Base_Type (E));
6226 -- We need to treat the type has having a non-standard
6227 -- representation, for back-end purposes, even though in
6228 -- general a complex will have the default representation
6229 -- of a record with two real components.
6231 Set_Has_Non_Standard_Rep (Base_Type (E));
6233 end Complex_Representation;
6235 -------------------------
6236 -- Component_Alignment --
6237 -------------------------
6239 -- pragma Component_Alignment (
6240 -- [Form =>] ALIGNMENT_CHOICE
6241 -- [, [Name =>] type_LOCAL_NAME]);
6243 -- ALIGNMENT_CHOICE ::=
6245 -- | Component_Size_4
6249 when Pragma_Component_Alignment => Component_AlignmentP : declare
6250 Args : Args_List (1 .. 2);
6251 Names : constant Name_List (1 .. 2) := (
6255 Form : Node_Id renames Args (1);
6256 Name : Node_Id renames Args (2);
6258 Atype : Component_Alignment_Kind;
6263 Gather_Associations (Names, Args);
6266 Error_Pragma ("missing Form argument for pragma%");
6269 Check_Arg_Is_Identifier (Form);
6271 -- Get proper alignment, note that Default = Component_Size on all
6272 -- machines we have so far, and we want to set this value rather
6273 -- than the default value to indicate that it has been explicitly
6274 -- set (and thus will not get overridden by the default component
6275 -- alignment for the current scope)
6277 if Chars (Form) = Name_Component_Size then
6278 Atype := Calign_Component_Size;
6280 elsif Chars (Form) = Name_Component_Size_4 then
6281 Atype := Calign_Component_Size_4;
6283 elsif Chars (Form) = Name_Default then
6284 Atype := Calign_Component_Size;
6286 elsif Chars (Form) = Name_Storage_Unit then
6287 Atype := Calign_Storage_Unit;
6291 ("invalid Form parameter for pragma%", Form);
6294 -- Case with no name, supplied, affects scope table entry
6298 (Scope_Stack.Last).Component_Alignment_Default := Atype;
6300 -- Case of name supplied
6303 Check_Arg_Is_Local_Name (Name);
6305 Typ := Entity (Name);
6308 or else Rep_Item_Too_Early (Typ, N)
6312 Typ := Underlying_Type (Typ);
6315 if not Is_Record_Type (Typ)
6316 and then not Is_Array_Type (Typ)
6319 ("Name parameter of pragma% must identify record or " &
6320 "array type", Name);
6323 -- An explicit Component_Alignment pragma overrides an
6324 -- implicit pragma Pack, but not an explicit one.
6326 if not Has_Pragma_Pack (Base_Type (Typ)) then
6327 Set_Is_Packed (Base_Type (Typ), False);
6328 Set_Component_Alignment (Base_Type (Typ), Atype);
6331 end Component_AlignmentP;
6337 -- pragma Controlled (first_subtype_LOCAL_NAME);
6339 when Pragma_Controlled => Controlled : declare
6343 Check_No_Identifiers;
6344 Check_Arg_Count (1);
6345 Check_Arg_Is_Local_Name (Arg1);
6346 Arg := Expression (Arg1);
6348 if not Is_Entity_Name (Arg)
6349 or else not Is_Access_Type (Entity (Arg))
6351 Error_Pragma_Arg ("pragma% requires access type", Arg1);
6353 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
6361 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
6362 -- [Entity =>] LOCAL_NAME);
6364 when Pragma_Convention => Convention : declare
6367 pragma Warnings (Off, C);
6368 pragma Warnings (Off, E);
6370 Check_Arg_Order ((Name_Convention, Name_Entity));
6371 Check_Ada_83_Warning;
6372 Check_Arg_Count (2);
6373 Process_Convention (C, E);
6376 ---------------------------
6377 -- Convention_Identifier --
6378 ---------------------------
6380 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
6381 -- [Convention =>] convention_IDENTIFIER);
6383 when Pragma_Convention_Identifier => Convention_Identifier : declare
6389 Check_Arg_Order ((Name_Name, Name_Convention));
6390 Check_Arg_Count (2);
6391 Check_Optional_Identifier (Arg1, Name_Name);
6392 Check_Optional_Identifier (Arg2, Name_Convention);
6393 Check_Arg_Is_Identifier (Arg1);
6394 Check_Arg_Is_Identifier (Arg2);
6395 Idnam := Chars (Expression (Arg1));
6396 Cname := Chars (Expression (Arg2));
6398 if Is_Convention_Name (Cname) then
6399 Record_Convention_Identifier
6400 (Idnam, Get_Convention_Id (Cname));
6403 ("second arg for % pragma must be convention", Arg2);
6405 end Convention_Identifier;
6411 -- pragma CPP_Class ([Entity =>] local_NAME)
6413 when Pragma_CPP_Class => CPP_Class : declare
6418 if Warn_On_Obsolescent_Feature then
6420 ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" &
6421 " by pragma import?", N);
6425 Check_Arg_Count (1);
6426 Check_Optional_Identifier (Arg1, Name_Entity);
6427 Check_Arg_Is_Local_Name (Arg1);
6429 Arg := Expression (Arg1);
6432 if Etype (Arg) = Any_Type then
6436 if not Is_Entity_Name (Arg)
6437 or else not Is_Type (Entity (Arg))
6439 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6442 Typ := Entity (Arg);
6444 if not Is_Tagged_Type (Typ) then
6445 Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1);
6448 -- Types treated as CPP classes are treated as limited, but we
6449 -- don't require them to be declared this way. A warning is issued
6450 -- to encourage the user to declare them as limited. This is not
6451 -- an error, for compatibility reasons, because these types have
6452 -- been supported this way for some time.
6454 if not Is_Limited_Type (Typ) then
6456 ("imported 'C'P'P type should be " &
6457 "explicitly declared limited?",
6458 Get_Pragma_Arg (Arg1));
6460 ("\type will be considered limited",
6461 Get_Pragma_Arg (Arg1));
6464 Set_Is_CPP_Class (Typ);
6465 Set_Is_Limited_Record (Typ);
6466 Set_Convention (Typ, Convention_CPP);
6468 -- Imported CPP types must not have discriminants (because C++
6469 -- classes do not have discriminants).
6471 if Has_Discriminants (Typ) then
6473 ("imported 'C'P'P type cannot have discriminants",
6474 First (Discriminant_Specifications
6475 (Declaration_Node (Typ))));
6478 -- Components of imported CPP types must not have default
6479 -- expressions because the constructor (if any) is in the
6482 if Is_Incomplete_Or_Private_Type (Typ)
6483 and then No (Underlying_Type (Typ))
6485 -- It should be an error to apply pragma CPP to a private
6486 -- type if the underlying type is not visible (as it is
6487 -- for any representation item). For now, for backward
6488 -- compatibility we do nothing but we cannot check components
6489 -- because they are not available at this stage. All this code
6490 -- will be removed when we cleanup this obsolete GNAT pragma???
6496 Tdef : constant Node_Id :=
6497 Type_Definition (Declaration_Node (Typ));
6502 if Nkind (Tdef) = N_Record_Definition then
6503 Clist := Component_List (Tdef);
6505 pragma Assert (Nkind (Tdef) = N_Derived_Type_Definition);
6506 Clist := Component_List (Record_Extension_Part (Tdef));
6509 if Present (Clist) then
6510 Comp := First (Component_Items (Clist));
6511 while Present (Comp) loop
6512 if Present (Expression (Comp)) then
6514 ("component of imported 'C'P'P type cannot have" &
6515 " default expression", Expression (Comp));
6525 ---------------------
6526 -- CPP_Constructor --
6527 ---------------------
6529 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME
6530 -- [, [External_Name =>] static_string_EXPRESSION ]
6531 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6533 when Pragma_CPP_Constructor => CPP_Constructor : declare
6537 Tag_Typ : Entity_Id;
6541 Check_At_Least_N_Arguments (1);
6542 Check_At_Most_N_Arguments (3);
6543 Check_Optional_Identifier (Arg1, Name_Entity);
6544 Check_Arg_Is_Local_Name (Arg1);
6546 Id := Expression (Arg1);
6547 Find_Program_Unit_Name (Id);
6549 -- If we did not find the name, we are done
6551 if Etype (Id) = Any_Type then
6555 Def_Id := Entity (Id);
6557 -- Check if already defined as constructor
6559 if Is_Constructor (Def_Id) then
6561 ("?duplicate argument for pragma 'C'P'P_Constructor", Arg1);
6565 if Ekind (Def_Id) = E_Function
6566 and then (Is_CPP_Class (Etype (Def_Id))
6567 or else (Is_Class_Wide_Type (Etype (Def_Id))
6569 Is_CPP_Class (Root_Type (Etype (Def_Id)))))
6571 if Arg_Count >= 2 then
6572 Set_Imported (Def_Id);
6573 Set_Is_Public (Def_Id);
6574 Process_Interface_Name (Def_Id, Arg2, Arg3);
6577 Set_Has_Completion (Def_Id);
6578 Set_Is_Constructor (Def_Id);
6580 -- Imported C++ constructors are not dispatching primitives
6581 -- because in C++ they don't have a dispatch table slot.
6582 -- However, in Ada the constructor has the profile of a
6583 -- function that returns a tagged type and therefore it has
6584 -- been treated as a primitive operation during semantic
6585 -- analysis. We now remove it from the list of primitive
6586 -- operations of the type.
6588 if Is_Tagged_Type (Etype (Def_Id))
6589 and then not Is_Class_Wide_Type (Etype (Def_Id))
6591 pragma Assert (Is_Dispatching_Operation (Def_Id));
6592 Tag_Typ := Etype (Def_Id);
6594 Elmt := First_Elmt (Primitive_Operations (Tag_Typ));
6595 while Present (Elmt) and then Node (Elmt) /= Def_Id loop
6599 Remove_Elmt (Primitive_Operations (Tag_Typ), Elmt);
6600 Set_Is_Dispatching_Operation (Def_Id, False);
6603 -- For backward compatibility, if the constructor returns a
6604 -- class wide type, and we internally change the return type to
6605 -- the corresponding root type.
6607 if Is_Class_Wide_Type (Etype (Def_Id)) then
6608 Set_Etype (Def_Id, Root_Type (Etype (Def_Id)));
6612 ("pragma% requires function returning a 'C'P'P_Class type",
6615 end CPP_Constructor;
6621 when Pragma_CPP_Virtual => CPP_Virtual : declare
6625 if Warn_On_Obsolescent_Feature then
6627 ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " &
6636 when Pragma_CPP_Vtable => CPP_Vtable : declare
6640 if Warn_On_Obsolescent_Feature then
6642 ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " &
6651 -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
6653 when Pragma_Debug => Debug : declare
6661 (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
6664 if Arg_Count = 2 then
6667 Left_Opnd => Relocate_Node (Cond),
6668 Right_Opnd => Expression (Arg1));
6671 -- Rewrite into a conditional with an appropriate condition. We
6672 -- wrap the procedure call in a block so that overhead from e.g.
6673 -- use of the secondary stack does not generate execution overhead
6674 -- for suppressed conditions.
6676 Rewrite (N, Make_Implicit_If_Statement (N,
6678 Then_Statements => New_List (
6679 Make_Block_Statement (Loc,
6680 Handled_Statement_Sequence =>
6681 Make_Handled_Sequence_Of_Statements (Loc,
6682 Statements => New_List (
6683 Relocate_Node (Debug_Statement (N))))))));
6691 -- pragma Debug_Policy (Check | Ignore)
6693 when Pragma_Debug_Policy =>
6695 Check_Arg_Count (1);
6696 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
6697 Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
6699 ---------------------
6700 -- Detect_Blocking --
6701 ---------------------
6703 -- pragma Detect_Blocking;
6705 when Pragma_Detect_Blocking =>
6707 Check_Arg_Count (0);
6708 Check_Valid_Configuration_Pragma;
6709 Detect_Blocking := True;
6715 when Pragma_Dimension =>
6717 Check_Arg_Count (4);
6718 Check_No_Identifiers;
6719 Check_Arg_Is_Local_Name (Arg1);
6721 if not Is_Type (Arg1) then
6722 Error_Pragma ("first argument for pragma% must be subtype");
6725 Check_Arg_Is_Static_Expression (Arg2, Standard_Integer);
6726 Check_Arg_Is_Static_Expression (Arg3, Standard_Integer);
6727 Check_Arg_Is_Static_Expression (Arg4, Standard_Integer);
6733 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
6735 when Pragma_Discard_Names => Discard_Names : declare
6740 Check_Ada_83_Warning;
6742 -- Deal with configuration pragma case
6744 if Arg_Count = 0 and then Is_Configuration_Pragma then
6745 Global_Discard_Names := True;
6748 -- Otherwise, check correct appropriate context
6751 Check_Is_In_Decl_Part_Or_Package_Spec;
6753 if Arg_Count = 0 then
6755 -- If there is no parameter, then from now on this pragma
6756 -- applies to any enumeration, exception or tagged type
6757 -- defined in the current declarative part, and recursively
6758 -- to any nested scope.
6760 Set_Discard_Names (Current_Scope);
6764 Check_Arg_Count (1);
6765 Check_Optional_Identifier (Arg1, Name_On);
6766 Check_Arg_Is_Local_Name (Arg1);
6768 E_Id := Expression (Arg1);
6770 if Etype (E_Id) = Any_Type then
6776 if (Is_First_Subtype (E)
6778 (Is_Enumeration_Type (E) or else Is_Tagged_Type (E)))
6779 or else Ekind (E) = E_Exception
6781 Set_Discard_Names (E);
6784 ("inappropriate entity for pragma%", Arg1);
6795 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
6797 when Pragma_Elaborate => Elaborate : declare
6802 -- Pragma must be in context items list of a compilation unit
6804 if not Is_In_Context_Clause then
6808 -- Must be at least one argument
6810 if Arg_Count = 0 then
6811 Error_Pragma ("pragma% requires at least one argument");
6814 -- In Ada 83 mode, there can be no items following it in the
6815 -- context list except other pragmas and implicit with clauses
6816 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
6817 -- placement rule does not apply.
6819 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
6821 while Present (Citem) loop
6822 if Nkind (Citem) = N_Pragma
6823 or else (Nkind (Citem) = N_With_Clause
6824 and then Implicit_With (Citem))
6829 ("(Ada 83) pragma% must be at end of context clause");
6836 -- Finally, the arguments must all be units mentioned in a with
6837 -- clause in the same context clause. Note we already checked (in
6838 -- Par.Prag) that the arguments are all identifiers or selected
6842 Outer : while Present (Arg) loop
6843 Citem := First (List_Containing (N));
6844 Inner : while Citem /= N loop
6845 if Nkind (Citem) = N_With_Clause
6846 and then Same_Name (Name (Citem), Expression (Arg))
6848 Set_Elaborate_Present (Citem, True);
6849 Set_Unit_Name (Expression (Arg), Name (Citem));
6851 -- With the pragma present, elaboration calls on
6852 -- subprograms from the named unit need no further
6853 -- checks, as long as the pragma appears in the current
6854 -- compilation unit. If the pragma appears in some unit
6855 -- in the context, there might still be a need for an
6856 -- Elaborate_All_Desirable from the current compilation
6857 -- to the named unit, so we keep the check enabled.
6859 if In_Extended_Main_Source_Unit (N) then
6860 Set_Suppress_Elaboration_Warnings
6861 (Entity (Name (Citem)));
6872 ("argument of pragma% is not with'ed unit", Arg);
6878 -- Give a warning if operating in static mode with -gnatwl
6879 -- (elaboration warnings enabled) switch set.
6881 if Elab_Warnings and not Dynamic_Elaboration_Checks then
6883 ("?use of pragma Elaborate may not be safe", N);
6885 ("?use pragma Elaborate_All instead if possible", N);
6893 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
6895 when Pragma_Elaborate_All => Elaborate_All : declare
6900 Check_Ada_83_Warning;
6902 -- Pragma must be in context items list of a compilation unit
6904 if not Is_In_Context_Clause then
6908 -- Must be at least one argument
6910 if Arg_Count = 0 then
6911 Error_Pragma ("pragma% requires at least one argument");
6914 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
6915 -- have to appear at the end of the context clause, but may
6916 -- appear mixed in with other items, even in Ada 83 mode.
6918 -- Final check: the arguments must all be units mentioned in
6919 -- a with clause in the same context clause. Note that we
6920 -- already checked (in Par.Prag) that all the arguments are
6921 -- either identifiers or selected components.
6924 Outr : while Present (Arg) loop
6925 Citem := First (List_Containing (N));
6926 Innr : while Citem /= N loop
6927 if Nkind (Citem) = N_With_Clause
6928 and then Same_Name (Name (Citem), Expression (Arg))
6930 Set_Elaborate_All_Present (Citem, True);
6931 Set_Unit_Name (Expression (Arg), Name (Citem));
6933 -- Suppress warnings and elaboration checks on the named
6934 -- unit if the pragma is in the current compilation, as
6935 -- for pragma Elaborate.
6937 if In_Extended_Main_Source_Unit (N) then
6938 Set_Suppress_Elaboration_Warnings
6939 (Entity (Name (Citem)));
6948 Set_Error_Posted (N);
6950 ("argument of pragma% is not with'ed unit", Arg);
6957 --------------------
6958 -- Elaborate_Body --
6959 --------------------
6961 -- pragma Elaborate_Body [( library_unit_NAME )];
6963 when Pragma_Elaborate_Body => Elaborate_Body : declare
6964 Cunit_Node : Node_Id;
6965 Cunit_Ent : Entity_Id;
6968 Check_Ada_83_Warning;
6969 Check_Valid_Library_Unit_Pragma;
6971 if Nkind (N) = N_Null_Statement then
6975 Cunit_Node := Cunit (Current_Sem_Unit);
6976 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
6978 if Nkind_In (Unit (Cunit_Node), N_Package_Body,
6981 Error_Pragma ("pragma% must refer to a spec, not a body");
6983 Set_Body_Required (Cunit_Node, True);
6984 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
6986 -- If we are in dynamic elaboration mode, then we suppress
6987 -- elaboration warnings for the unit, since it is definitely
6988 -- fine NOT to do dynamic checks at the first level (and such
6989 -- checks will be suppressed because no elaboration boolean
6990 -- is created for Elaborate_Body packages).
6992 -- But in the static model of elaboration, Elaborate_Body is
6993 -- definitely NOT good enough to ensure elaboration safety on
6994 -- its own, since the body may WITH other units that are not
6995 -- safe from an elaboration point of view, so a client must
6996 -- still do an Elaborate_All on such units.
6998 -- Debug flag -gnatdD restores the old behavior of 3.13, where
6999 -- Elaborate_Body always suppressed elab warnings.
7001 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
7002 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
7007 ------------------------
7008 -- Elaboration_Checks --
7009 ------------------------
7011 -- pragma Elaboration_Checks (Static | Dynamic);
7013 when Pragma_Elaboration_Checks =>
7015 Check_Arg_Count (1);
7016 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
7017 Dynamic_Elaboration_Checks :=
7018 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
7024 -- pragma Eliminate (
7025 -- [Unit_Name =>] IDENTIFIER | SELECTED_COMPONENT,
7026 -- [,[Entity =>] IDENTIFIER |
7027 -- SELECTED_COMPONENT |
7029 -- [, OVERLOADING_RESOLUTION]);
7031 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
7034 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
7037 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
7039 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
7040 -- Result_Type => result_SUBTYPE_NAME]
7042 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
7043 -- SUBTYPE_NAME ::= STRING_LITERAL
7045 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
7046 -- SOURCE_TRACE ::= STRING_LITERAL
7048 when Pragma_Eliminate => Eliminate : declare
7049 Args : Args_List (1 .. 5);
7050 Names : constant Name_List (1 .. 5) := (
7053 Name_Parameter_Types,
7055 Name_Source_Location);
7057 Unit_Name : Node_Id renames Args (1);
7058 Entity : Node_Id renames Args (2);
7059 Parameter_Types : Node_Id renames Args (3);
7060 Result_Type : Node_Id renames Args (4);
7061 Source_Location : Node_Id renames Args (5);
7065 Check_Valid_Configuration_Pragma;
7066 Gather_Associations (Names, Args);
7068 if No (Unit_Name) then
7069 Error_Pragma ("missing Unit_Name argument for pragma%");
7073 and then (Present (Parameter_Types)
7075 Present (Result_Type)
7077 Present (Source_Location))
7079 Error_Pragma ("missing Entity argument for pragma%");
7082 if (Present (Parameter_Types)
7084 Present (Result_Type))
7086 Present (Source_Location)
7089 ("parameter profile and source location cannot " &
7090 "be used together in pragma%");
7093 Process_Eliminate_Pragma
7107 -- [ Convention =>] convention_IDENTIFIER,
7108 -- [ Entity =>] local_NAME
7109 -- [, [External_Name =>] static_string_EXPRESSION ]
7110 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7112 when Pragma_Export => Export : declare
7116 pragma Warnings (Off, C);
7119 Check_Ada_83_Warning;
7125 Check_At_Least_N_Arguments (2);
7126 Check_At_Most_N_Arguments (4);
7127 Process_Convention (C, Def_Id);
7129 if Ekind (Def_Id) /= E_Constant then
7130 Note_Possible_Modification (Expression (Arg2), Sure => False);
7133 Process_Interface_Name (Def_Id, Arg3, Arg4);
7134 Set_Exported (Def_Id, Arg2);
7136 -- If the entity is a deferred constant, propagate the information
7137 -- to the full view, because gigi elaborates the full view only.
7139 if Ekind (Def_Id) = E_Constant
7140 and then Present (Full_View (Def_Id))
7143 Id2 : constant Entity_Id := Full_View (Def_Id);
7145 Set_Is_Exported (Id2, Is_Exported (Def_Id));
7146 Set_First_Rep_Item (Id2, First_Rep_Item (Def_Id));
7147 Set_Interface_Name (Id2, Einfo.Interface_Name (Def_Id));
7152 ----------------------
7153 -- Export_Exception --
7154 ----------------------
7156 -- pragma Export_Exception (
7157 -- [Internal =>] LOCAL_NAME
7158 -- [, [External =>] EXTERNAL_SYMBOL]
7159 -- [, [Form =>] Ada | VMS]
7160 -- [, [Code =>] static_integer_EXPRESSION]);
7162 when Pragma_Export_Exception => Export_Exception : declare
7163 Args : Args_List (1 .. 4);
7164 Names : constant Name_List (1 .. 4) := (
7170 Internal : Node_Id renames Args (1);
7171 External : Node_Id renames Args (2);
7172 Form : Node_Id renames Args (3);
7173 Code : Node_Id renames Args (4);
7178 if Inside_A_Generic then
7179 Error_Pragma ("pragma% cannot be used for generic entities");
7182 Gather_Associations (Names, Args);
7183 Process_Extended_Import_Export_Exception_Pragma (
7184 Arg_Internal => Internal,
7185 Arg_External => External,
7189 if not Is_VMS_Exception (Entity (Internal)) then
7190 Set_Exported (Entity (Internal), Internal);
7192 end Export_Exception;
7194 ---------------------
7195 -- Export_Function --
7196 ---------------------
7198 -- pragma Export_Function (
7199 -- [Internal =>] LOCAL_NAME
7200 -- [, [External =>] EXTERNAL_SYMBOL]
7201 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7202 -- [, [Result_Type =>] TYPE_DESIGNATOR]
7203 -- [, [Mechanism =>] MECHANISM]
7204 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
7206 -- EXTERNAL_SYMBOL ::=
7208 -- | static_string_EXPRESSION
7210 -- PARAMETER_TYPES ::=
7212 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7214 -- TYPE_DESIGNATOR ::=
7216 -- | subtype_Name ' Access
7220 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7222 -- MECHANISM_ASSOCIATION ::=
7223 -- [formal_parameter_NAME =>] MECHANISM_NAME
7225 -- MECHANISM_NAME ::=
7228 -- | Descriptor [([Class =>] CLASS_NAME)]
7230 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7232 when Pragma_Export_Function => Export_Function : declare
7233 Args : Args_List (1 .. 6);
7234 Names : constant Name_List (1 .. 6) := (
7237 Name_Parameter_Types,
7240 Name_Result_Mechanism);
7242 Internal : Node_Id renames Args (1);
7243 External : Node_Id renames Args (2);
7244 Parameter_Types : Node_Id renames Args (3);
7245 Result_Type : Node_Id renames Args (4);
7246 Mechanism : Node_Id renames Args (5);
7247 Result_Mechanism : Node_Id renames Args (6);
7251 Gather_Associations (Names, Args);
7252 Process_Extended_Import_Export_Subprogram_Pragma (
7253 Arg_Internal => Internal,
7254 Arg_External => External,
7255 Arg_Parameter_Types => Parameter_Types,
7256 Arg_Result_Type => Result_Type,
7257 Arg_Mechanism => Mechanism,
7258 Arg_Result_Mechanism => Result_Mechanism);
7259 end Export_Function;
7265 -- pragma Export_Object (
7266 -- [Internal =>] LOCAL_NAME
7267 -- [, [External =>] EXTERNAL_SYMBOL]
7268 -- [, [Size =>] EXTERNAL_SYMBOL]);
7270 -- EXTERNAL_SYMBOL ::=
7272 -- | static_string_EXPRESSION
7274 -- PARAMETER_TYPES ::=
7276 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7278 -- TYPE_DESIGNATOR ::=
7280 -- | subtype_Name ' Access
7284 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7286 -- MECHANISM_ASSOCIATION ::=
7287 -- [formal_parameter_NAME =>] MECHANISM_NAME
7289 -- MECHANISM_NAME ::=
7292 -- | Descriptor [([Class =>] CLASS_NAME)]
7294 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7296 when Pragma_Export_Object => Export_Object : declare
7297 Args : Args_List (1 .. 3);
7298 Names : constant Name_List (1 .. 3) := (
7303 Internal : Node_Id renames Args (1);
7304 External : Node_Id renames Args (2);
7305 Size : Node_Id renames Args (3);
7309 Gather_Associations (Names, Args);
7310 Process_Extended_Import_Export_Object_Pragma (
7311 Arg_Internal => Internal,
7312 Arg_External => External,
7316 ----------------------
7317 -- Export_Procedure --
7318 ----------------------
7320 -- pragma Export_Procedure (
7321 -- [Internal =>] LOCAL_NAME
7322 -- [, [External =>] EXTERNAL_SYMBOL]
7323 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7324 -- [, [Mechanism =>] MECHANISM]);
7326 -- EXTERNAL_SYMBOL ::=
7328 -- | static_string_EXPRESSION
7330 -- PARAMETER_TYPES ::=
7332 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7334 -- TYPE_DESIGNATOR ::=
7336 -- | subtype_Name ' Access
7340 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7342 -- MECHANISM_ASSOCIATION ::=
7343 -- [formal_parameter_NAME =>] MECHANISM_NAME
7345 -- MECHANISM_NAME ::=
7348 -- | Descriptor [([Class =>] CLASS_NAME)]
7350 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7352 when Pragma_Export_Procedure => Export_Procedure : declare
7353 Args : Args_List (1 .. 4);
7354 Names : constant Name_List (1 .. 4) := (
7357 Name_Parameter_Types,
7360 Internal : Node_Id renames Args (1);
7361 External : Node_Id renames Args (2);
7362 Parameter_Types : Node_Id renames Args (3);
7363 Mechanism : Node_Id renames Args (4);
7367 Gather_Associations (Names, Args);
7368 Process_Extended_Import_Export_Subprogram_Pragma (
7369 Arg_Internal => Internal,
7370 Arg_External => External,
7371 Arg_Parameter_Types => Parameter_Types,
7372 Arg_Mechanism => Mechanism);
7373 end Export_Procedure;
7379 -- pragma Export_Value (
7380 -- [Value =>] static_integer_EXPRESSION,
7381 -- [Link_Name =>] static_string_EXPRESSION);
7383 when Pragma_Export_Value =>
7385 Check_Arg_Order ((Name_Value, Name_Link_Name));
7386 Check_Arg_Count (2);
7388 Check_Optional_Identifier (Arg1, Name_Value);
7389 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
7391 Check_Optional_Identifier (Arg2, Name_Link_Name);
7392 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7394 -----------------------------
7395 -- Export_Valued_Procedure --
7396 -----------------------------
7398 -- pragma Export_Valued_Procedure (
7399 -- [Internal =>] LOCAL_NAME
7400 -- [, [External =>] EXTERNAL_SYMBOL,]
7401 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7402 -- [, [Mechanism =>] MECHANISM]);
7404 -- EXTERNAL_SYMBOL ::=
7406 -- | static_string_EXPRESSION
7408 -- PARAMETER_TYPES ::=
7410 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7412 -- TYPE_DESIGNATOR ::=
7414 -- | subtype_Name ' Access
7418 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7420 -- MECHANISM_ASSOCIATION ::=
7421 -- [formal_parameter_NAME =>] MECHANISM_NAME
7423 -- MECHANISM_NAME ::=
7426 -- | Descriptor [([Class =>] CLASS_NAME)]
7428 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7430 when Pragma_Export_Valued_Procedure =>
7431 Export_Valued_Procedure : declare
7432 Args : Args_List (1 .. 4);
7433 Names : constant Name_List (1 .. 4) := (
7436 Name_Parameter_Types,
7439 Internal : Node_Id renames Args (1);
7440 External : Node_Id renames Args (2);
7441 Parameter_Types : Node_Id renames Args (3);
7442 Mechanism : Node_Id renames Args (4);
7446 Gather_Associations (Names, Args);
7447 Process_Extended_Import_Export_Subprogram_Pragma (
7448 Arg_Internal => Internal,
7449 Arg_External => External,
7450 Arg_Parameter_Types => Parameter_Types,
7451 Arg_Mechanism => Mechanism);
7452 end Export_Valued_Procedure;
7458 -- pragma Extend_System ([Name =>] Identifier);
7460 when Pragma_Extend_System => Extend_System : declare
7463 Check_Valid_Configuration_Pragma;
7464 Check_Arg_Count (1);
7465 Check_Optional_Identifier (Arg1, Name_Name);
7466 Check_Arg_Is_Identifier (Arg1);
7468 Get_Name_String (Chars (Expression (Arg1)));
7471 and then Name_Buffer (1 .. 4) = "aux_"
7473 if Present (System_Extend_Pragma_Arg) then
7474 if Chars (Expression (Arg1)) =
7475 Chars (Expression (System_Extend_Pragma_Arg))
7479 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
7480 Error_Pragma ("pragma% conflicts with that #");
7484 System_Extend_Pragma_Arg := Arg1;
7486 if not GNAT_Mode then
7487 System_Extend_Unit := Arg1;
7491 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
7495 ------------------------
7496 -- Extensions_Allowed --
7497 ------------------------
7499 -- pragma Extensions_Allowed (ON | OFF);
7501 when Pragma_Extensions_Allowed =>
7503 Check_Arg_Count (1);
7504 Check_No_Identifiers;
7505 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7507 if Chars (Expression (Arg1)) = Name_On then
7508 Extensions_Allowed := True;
7509 Ada_Version := Ada_Version_Type'Last;
7512 Extensions_Allowed := False;
7513 Ada_Version := Ada_Version_Explicit;
7520 -- pragma External (
7521 -- [ Convention =>] convention_IDENTIFIER,
7522 -- [ Entity =>] local_NAME
7523 -- [, [External_Name =>] static_string_EXPRESSION ]
7524 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7526 when Pragma_External => External : declare
7530 pragma Warnings (Off, C);
7539 Check_At_Least_N_Arguments (2);
7540 Check_At_Most_N_Arguments (4);
7541 Process_Convention (C, Def_Id);
7542 Note_Possible_Modification (Expression (Arg2), Sure => False);
7543 Process_Interface_Name (Def_Id, Arg3, Arg4);
7544 Set_Exported (Def_Id, Arg2);
7547 --------------------------
7548 -- External_Name_Casing --
7549 --------------------------
7551 -- pragma External_Name_Casing (
7552 -- UPPERCASE | LOWERCASE
7553 -- [, AS_IS | UPPERCASE | LOWERCASE]);
7555 when Pragma_External_Name_Casing => External_Name_Casing : declare
7558 Check_No_Identifiers;
7560 if Arg_Count = 2 then
7562 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
7564 case Chars (Get_Pragma_Arg (Arg2)) is
7566 Opt.External_Name_Exp_Casing := As_Is;
7568 when Name_Uppercase =>
7569 Opt.External_Name_Exp_Casing := Uppercase;
7571 when Name_Lowercase =>
7572 Opt.External_Name_Exp_Casing := Lowercase;
7579 Check_Arg_Count (1);
7582 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
7584 case Chars (Get_Pragma_Arg (Arg1)) is
7585 when Name_Uppercase =>
7586 Opt.External_Name_Imp_Casing := Uppercase;
7588 when Name_Lowercase =>
7589 Opt.External_Name_Imp_Casing := Lowercase;
7594 end External_Name_Casing;
7596 --------------------------
7597 -- Favor_Top_Level --
7598 --------------------------
7600 -- pragma Favor_Top_Level (type_NAME);
7602 when Pragma_Favor_Top_Level => Favor_Top_Level : declare
7603 Named_Entity : Entity_Id;
7607 Check_No_Identifiers;
7608 Check_Arg_Count (1);
7609 Check_Arg_Is_Local_Name (Arg1);
7610 Named_Entity := Entity (Expression (Arg1));
7612 -- If it's an access-to-subprogram type (in particular, not a
7613 -- subtype), set the flag on that type.
7615 if Is_Access_Subprogram_Type (Named_Entity) then
7616 Set_Can_Use_Internal_Rep (Named_Entity, False);
7618 -- Otherwise it's an error (name denotes the wrong sort of entity)
7622 ("access-to-subprogram type expected", Expression (Arg1));
7624 end Favor_Top_Level;
7630 -- pragma Fast_Math;
7632 when Pragma_Fast_Math =>
7634 Check_No_Identifiers;
7635 Check_Valid_Configuration_Pragma;
7638 ---------------------------
7639 -- Finalize_Storage_Only --
7640 ---------------------------
7642 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
7644 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
7645 Assoc : constant Node_Id := Arg1;
7646 Type_Id : constant Node_Id := Expression (Assoc);
7651 Check_No_Identifiers;
7652 Check_Arg_Count (1);
7653 Check_Arg_Is_Local_Name (Arg1);
7655 Find_Type (Type_Id);
7656 Typ := Entity (Type_Id);
7659 or else Rep_Item_Too_Early (Typ, N)
7663 Typ := Underlying_Type (Typ);
7666 if not Is_Controlled (Typ) then
7667 Error_Pragma ("pragma% must specify controlled type");
7670 Check_First_Subtype (Arg1);
7672 if Finalize_Storage_Only (Typ) then
7673 Error_Pragma ("duplicate pragma%, only one allowed");
7675 elsif not Rep_Item_Too_Late (Typ, N) then
7676 Set_Finalize_Storage_Only (Base_Type (Typ), True);
7678 end Finalize_Storage;
7680 --------------------------
7681 -- Float_Representation --
7682 --------------------------
7684 -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
7686 -- FLOAT_REP ::= VAX_Float | IEEE_Float
7688 when Pragma_Float_Representation => Float_Representation : declare
7696 if Arg_Count = 1 then
7697 Check_Valid_Configuration_Pragma;
7699 Check_Arg_Count (2);
7700 Check_Optional_Identifier (Arg2, Name_Entity);
7701 Check_Arg_Is_Local_Name (Arg2);
7704 Check_No_Identifier (Arg1);
7705 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
7707 if not OpenVMS_On_Target then
7708 if Chars (Expression (Arg1)) = Name_VAX_Float then
7710 ("?pragma% ignored (applies only to Open'V'M'S)");
7716 -- One argument case
7718 if Arg_Count = 1 then
7719 if Chars (Expression (Arg1)) = Name_VAX_Float then
7720 if Opt.Float_Format = 'I' then
7721 Error_Pragma ("'I'E'E'E format previously specified");
7724 Opt.Float_Format := 'V';
7727 if Opt.Float_Format = 'V' then
7728 Error_Pragma ("'V'A'X format previously specified");
7731 Opt.Float_Format := 'I';
7734 Set_Standard_Fpt_Formats;
7736 -- Two argument case
7739 Argx := Get_Pragma_Arg (Arg2);
7741 if not Is_Entity_Name (Argx)
7742 or else not Is_Floating_Point_Type (Entity (Argx))
7745 ("second argument of% pragma must be floating-point type",
7749 Ent := Entity (Argx);
7750 Digs := UI_To_Int (Digits_Value (Ent));
7752 -- Two arguments, VAX_Float case
7754 if Chars (Expression (Arg1)) = Name_VAX_Float then
7756 when 6 => Set_F_Float (Ent);
7757 when 9 => Set_D_Float (Ent);
7758 when 15 => Set_G_Float (Ent);
7762 ("wrong digits value, must be 6,9 or 15", Arg2);
7765 -- Two arguments, IEEE_Float case
7769 when 6 => Set_IEEE_Short (Ent);
7770 when 15 => Set_IEEE_Long (Ent);
7774 ("wrong digits value, must be 6 or 15", Arg2);
7778 end Float_Representation;
7784 -- pragma Ident (static_string_EXPRESSION)
7786 -- Note: pragma Comment shares this processing. Pragma Comment is
7787 -- identical to Ident, except that the restriction of the argument to
7788 -- 31 characters and the placement restrictions are not enforced for
7791 when Pragma_Ident | Pragma_Comment => Ident : declare
7796 Check_Arg_Count (1);
7797 Check_No_Identifiers;
7798 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7801 -- For pragma Ident, preserve DEC compatibility by requiring the
7802 -- pragma to appear in a declarative part or package spec.
7804 if Prag_Id = Pragma_Ident then
7805 Check_Is_In_Decl_Part_Or_Package_Spec;
7808 Str := Expr_Value_S (Expression (Arg1));
7815 GP := Parent (Parent (N));
7817 if Nkind_In (GP, N_Package_Declaration,
7818 N_Generic_Package_Declaration)
7823 -- If we have a compilation unit, then record the ident value,
7824 -- checking for improper duplication.
7826 if Nkind (GP) = N_Compilation_Unit then
7827 CS := Ident_String (Current_Sem_Unit);
7829 if Present (CS) then
7831 -- For Ident, we do not permit multiple instances
7833 if Prag_Id = Pragma_Ident then
7834 Error_Pragma ("duplicate% pragma not permitted");
7836 -- For Comment, we concatenate the string, unless we want
7837 -- to preserve the tree structure for ASIS.
7839 elsif not ASIS_Mode then
7840 Start_String (Strval (CS));
7841 Store_String_Char (' ');
7842 Store_String_Chars (Strval (Str));
7843 Set_Strval (CS, End_String);
7847 -- In VMS, the effect of IDENT is achieved by passing
7848 -- IDENTIFICATION=name as a --for-linker switch.
7850 if OpenVMS_On_Target then
7853 ("--for-linker=IDENTIFICATION=");
7854 String_To_Name_Buffer (Strval (Str));
7855 Store_String_Chars (Name_Buffer (1 .. Name_Len));
7857 -- Only the last processed IDENT is saved. The main
7858 -- purpose is so an IDENT associated with a main
7859 -- procedure will be used in preference to an IDENT
7860 -- associated with a with'd package.
7862 Replace_Linker_Option_String
7863 (End_String, "--for-linker=IDENTIFICATION=");
7866 Set_Ident_String (Current_Sem_Unit, Str);
7869 -- For subunits, we just ignore the Ident, since in GNAT these
7870 -- are not separate object files, and hence not separate units
7871 -- in the unit table.
7873 elsif Nkind (GP) = N_Subunit then
7876 -- Otherwise we have a misplaced pragma Ident, but we ignore
7877 -- this if we are in an instantiation, since it comes from
7878 -- a generic, and has no relevance to the instantiation.
7880 elsif Prag_Id = Pragma_Ident then
7881 if Instantiation_Location (Loc) = No_Location then
7882 Error_Pragma ("pragma% only allowed at outer level");
7888 --------------------------
7889 -- Implemented_By_Entry --
7890 --------------------------
7892 -- pragma Implemented_By_Entry (DIRECT_NAME);
7894 when Pragma_Implemented_By_Entry => Implemented_By_Entry : declare
7899 Check_Arg_Count (1);
7900 Check_No_Identifiers;
7901 Check_Arg_Is_Identifier (Arg1);
7902 Check_Arg_Is_Local_Name (Arg1);
7903 Ent := Entity (Expression (Arg1));
7905 -- Pragma Implemented_By_Entry must be applied only to protected
7906 -- synchronized or task interface primitives.
7908 if (Ekind (Ent) /= E_Function
7909 and then Ekind (Ent) /= E_Procedure)
7910 or else not Present (First_Formal (Ent))
7911 or else not Is_Concurrent_Interface (Etype (First_Formal (Ent)))
7914 ("pragma % must be applied to a concurrent interface " &
7918 if Einfo.Implemented_By_Entry (Ent)
7919 and then Warn_On_Redundant_Constructs
7921 Error_Pragma ("?duplicate pragma%!");
7923 Set_Implemented_By_Entry (Ent);
7926 end Implemented_By_Entry;
7928 -----------------------
7929 -- Implicit_Packing --
7930 -----------------------
7932 -- pragma Implicit_Packing;
7934 when Pragma_Implicit_Packing =>
7936 Check_Arg_Count (0);
7937 Implicit_Packing := True;
7944 -- [Convention =>] convention_IDENTIFIER,
7945 -- [Entity =>] local_NAME
7946 -- [, [External_Name =>] static_string_EXPRESSION ]
7947 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7949 when Pragma_Import =>
7950 Check_Ada_83_Warning;
7956 Check_At_Least_N_Arguments (2);
7957 Check_At_Most_N_Arguments (4);
7958 Process_Import_Or_Interface;
7960 ----------------------
7961 -- Import_Exception --
7962 ----------------------
7964 -- pragma Import_Exception (
7965 -- [Internal =>] LOCAL_NAME
7966 -- [, [External =>] EXTERNAL_SYMBOL]
7967 -- [, [Form =>] Ada | VMS]
7968 -- [, [Code =>] static_integer_EXPRESSION]);
7970 when Pragma_Import_Exception => Import_Exception : declare
7971 Args : Args_List (1 .. 4);
7972 Names : constant Name_List (1 .. 4) := (
7978 Internal : Node_Id renames Args (1);
7979 External : Node_Id renames Args (2);
7980 Form : Node_Id renames Args (3);
7981 Code : Node_Id renames Args (4);
7985 Gather_Associations (Names, Args);
7987 if Present (External) and then Present (Code) then
7989 ("cannot give both External and Code options for pragma%");
7992 Process_Extended_Import_Export_Exception_Pragma (
7993 Arg_Internal => Internal,
7994 Arg_External => External,
7998 if not Is_VMS_Exception (Entity (Internal)) then
7999 Set_Imported (Entity (Internal));
8001 end Import_Exception;
8003 ---------------------
8004 -- Import_Function --
8005 ---------------------
8007 -- pragma Import_Function (
8008 -- [Internal =>] LOCAL_NAME,
8009 -- [, [External =>] EXTERNAL_SYMBOL]
8010 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
8011 -- [, [Result_Type =>] SUBTYPE_MARK]
8012 -- [, [Mechanism =>] MECHANISM]
8013 -- [, [Result_Mechanism =>] MECHANISM_NAME]
8014 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
8016 -- EXTERNAL_SYMBOL ::=
8018 -- | static_string_EXPRESSION
8020 -- PARAMETER_TYPES ::=
8022 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
8024 -- TYPE_DESIGNATOR ::=
8026 -- | subtype_Name ' Access
8030 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
8032 -- MECHANISM_ASSOCIATION ::=
8033 -- [formal_parameter_NAME =>] MECHANISM_NAME
8035 -- MECHANISM_NAME ::=
8038 -- | Descriptor [([Class =>] CLASS_NAME)]
8040 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
8042 when Pragma_Import_Function => Import_Function : declare
8043 Args : Args_List (1 .. 7);
8044 Names : constant Name_List (1 .. 7) := (
8047 Name_Parameter_Types,
8050 Name_Result_Mechanism,
8051 Name_First_Optional_Parameter);
8053 Internal : Node_Id renames Args (1);
8054 External : Node_Id renames Args (2);
8055 Parameter_Types : Node_Id renames Args (3);
8056 Result_Type : Node_Id renames Args (4);
8057 Mechanism : Node_Id renames Args (5);
8058 Result_Mechanism : Node_Id renames Args (6);
8059 First_Optional_Parameter : Node_Id renames Args (7);
8063 Gather_Associations (Names, Args);
8064 Process_Extended_Import_Export_Subprogram_Pragma (
8065 Arg_Internal => Internal,
8066 Arg_External => External,
8067 Arg_Parameter_Types => Parameter_Types,
8068 Arg_Result_Type => Result_Type,
8069 Arg_Mechanism => Mechanism,
8070 Arg_Result_Mechanism => Result_Mechanism,
8071 Arg_First_Optional_Parameter => First_Optional_Parameter);
8072 end Import_Function;
8078 -- pragma Import_Object (
8079 -- [Internal =>] LOCAL_NAME
8080 -- [, [External =>] EXTERNAL_SYMBOL]
8081 -- [, [Size =>] EXTERNAL_SYMBOL]);
8083 -- EXTERNAL_SYMBOL ::=
8085 -- | static_string_EXPRESSION
8087 when Pragma_Import_Object => Import_Object : declare
8088 Args : Args_List (1 .. 3);
8089 Names : constant Name_List (1 .. 3) := (
8094 Internal : Node_Id renames Args (1);
8095 External : Node_Id renames Args (2);
8096 Size : Node_Id renames Args (3);
8100 Gather_Associations (Names, Args);
8101 Process_Extended_Import_Export_Object_Pragma (
8102 Arg_Internal => Internal,
8103 Arg_External => External,
8107 ----------------------
8108 -- Import_Procedure --
8109 ----------------------
8111 -- pragma Import_Procedure (
8112 -- [Internal =>] LOCAL_NAME
8113 -- [, [External =>] EXTERNAL_SYMBOL]
8114 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
8115 -- [, [Mechanism =>] MECHANISM]
8116 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
8118 -- EXTERNAL_SYMBOL ::=
8120 -- | static_string_EXPRESSION
8122 -- PARAMETER_TYPES ::=
8124 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
8126 -- TYPE_DESIGNATOR ::=
8128 -- | subtype_Name ' Access
8132 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
8134 -- MECHANISM_ASSOCIATION ::=
8135 -- [formal_parameter_NAME =>] MECHANISM_NAME
8137 -- MECHANISM_NAME ::=
8140 -- | Descriptor [([Class =>] CLASS_NAME)]
8142 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
8144 when Pragma_Import_Procedure => Import_Procedure : declare
8145 Args : Args_List (1 .. 5);
8146 Names : constant Name_List (1 .. 5) := (
8149 Name_Parameter_Types,
8151 Name_First_Optional_Parameter);
8153 Internal : Node_Id renames Args (1);
8154 External : Node_Id renames Args (2);
8155 Parameter_Types : Node_Id renames Args (3);
8156 Mechanism : Node_Id renames Args (4);
8157 First_Optional_Parameter : Node_Id renames Args (5);
8161 Gather_Associations (Names, Args);
8162 Process_Extended_Import_Export_Subprogram_Pragma (
8163 Arg_Internal => Internal,
8164 Arg_External => External,
8165 Arg_Parameter_Types => Parameter_Types,
8166 Arg_Mechanism => Mechanism,
8167 Arg_First_Optional_Parameter => First_Optional_Parameter);
8168 end Import_Procedure;
8170 -----------------------------
8171 -- Import_Valued_Procedure --
8172 -----------------------------
8174 -- pragma Import_Valued_Procedure (
8175 -- [Internal =>] LOCAL_NAME
8176 -- [, [External =>] EXTERNAL_SYMBOL]
8177 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
8178 -- [, [Mechanism =>] MECHANISM]
8179 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
8181 -- EXTERNAL_SYMBOL ::=
8183 -- | static_string_EXPRESSION
8185 -- PARAMETER_TYPES ::=
8187 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
8189 -- TYPE_DESIGNATOR ::=
8191 -- | subtype_Name ' Access
8195 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
8197 -- MECHANISM_ASSOCIATION ::=
8198 -- [formal_parameter_NAME =>] MECHANISM_NAME
8200 -- MECHANISM_NAME ::=
8203 -- | Descriptor [([Class =>] CLASS_NAME)]
8205 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
8207 when Pragma_Import_Valued_Procedure =>
8208 Import_Valued_Procedure : declare
8209 Args : Args_List (1 .. 5);
8210 Names : constant Name_List (1 .. 5) := (
8213 Name_Parameter_Types,
8215 Name_First_Optional_Parameter);
8217 Internal : Node_Id renames Args (1);
8218 External : Node_Id renames Args (2);
8219 Parameter_Types : Node_Id renames Args (3);
8220 Mechanism : Node_Id renames Args (4);
8221 First_Optional_Parameter : Node_Id renames Args (5);
8225 Gather_Associations (Names, Args);
8226 Process_Extended_Import_Export_Subprogram_Pragma (
8227 Arg_Internal => Internal,
8228 Arg_External => External,
8229 Arg_Parameter_Types => Parameter_Types,
8230 Arg_Mechanism => Mechanism,
8231 Arg_First_Optional_Parameter => First_Optional_Parameter);
8232 end Import_Valued_Procedure;
8234 ------------------------
8235 -- Initialize_Scalars --
8236 ------------------------
8238 -- pragma Initialize_Scalars;
8240 when Pragma_Initialize_Scalars =>
8242 Check_Arg_Count (0);
8243 Check_Valid_Configuration_Pragma;
8244 Check_Restriction (No_Initialize_Scalars, N);
8246 -- Initialize_Scalars creates false positives in CodePeer,
8247 -- so ignore this pragma in this mode.
8249 if not Restriction_Active (No_Initialize_Scalars)
8250 and then not CodePeer_Mode
8252 Init_Or_Norm_Scalars := True;
8253 Initialize_Scalars := True;
8260 -- pragma Inline ( NAME {, NAME} );
8262 when Pragma_Inline =>
8264 -- Pragma is active if inlining option is active
8266 Process_Inline (Inline_Active);
8272 -- pragma Inline_Always ( NAME {, NAME} );
8274 when Pragma_Inline_Always =>
8276 Process_Inline (True);
8278 --------------------
8279 -- Inline_Generic --
8280 --------------------
8282 -- pragma Inline_Generic (NAME {, NAME});
8284 when Pragma_Inline_Generic =>
8286 Process_Generic_List;
8288 ----------------------
8289 -- Inspection_Point --
8290 ----------------------
8292 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
8294 when Pragma_Inspection_Point => Inspection_Point : declare
8299 if Arg_Count > 0 then
8302 Exp := Expression (Arg);
8305 if not Is_Entity_Name (Exp)
8306 or else not Is_Object (Entity (Exp))
8308 Error_Pragma_Arg ("object name required", Arg);
8315 end Inspection_Point;
8321 -- pragma Interface (
8322 -- [ Convention =>] convention_IDENTIFIER,
8323 -- [ Entity =>] local_NAME
8324 -- [, [External_Name =>] static_string_EXPRESSION ]
8325 -- [, [Link_Name =>] static_string_EXPRESSION ]);
8327 when Pragma_Interface =>
8334 Check_At_Least_N_Arguments (2);
8335 Check_At_Most_N_Arguments (4);
8336 Process_Import_Or_Interface;
8338 -- In Ada 2005, the permission to use Interface (a reserved word)
8339 -- as a pragma name is considered an obsolescent feature.
8341 if Ada_Version >= Ada_2005 then
8343 (No_Obsolescent_Features, Pragma_Identifier (N));
8346 --------------------
8347 -- Interface_Name --
8348 --------------------
8350 -- pragma Interface_Name (
8351 -- [ Entity =>] local_NAME
8352 -- [,[External_Name =>] static_string_EXPRESSION ]
8353 -- [,[Link_Name =>] static_string_EXPRESSION ]);
8355 when Pragma_Interface_Name => Interface_Name : declare
8364 ((Name_Entity, Name_External_Name, Name_Link_Name));
8365 Check_At_Least_N_Arguments (2);
8366 Check_At_Most_N_Arguments (3);
8367 Id := Expression (Arg1);
8370 if not Is_Entity_Name (Id) then
8372 ("first argument for pragma% must be entity name", Arg1);
8373 elsif Etype (Id) = Any_Type then
8376 Def_Id := Entity (Id);
8379 -- Special DEC-compatible processing for the object case, forces
8380 -- object to be imported.
8382 if Ekind (Def_Id) = E_Variable then
8383 Kill_Size_Check_Code (Def_Id);
8384 Note_Possible_Modification (Id, Sure => False);
8386 -- Initialization is not allowed for imported variable
8388 if Present (Expression (Parent (Def_Id)))
8389 and then Comes_From_Source (Expression (Parent (Def_Id)))
8391 Error_Msg_Sloc := Sloc (Def_Id);
8393 ("no initialization allowed for declaration of& #",
8397 -- For compatibility, support VADS usage of providing both
8398 -- pragmas Interface and Interface_Name to obtain the effect
8399 -- of a single Import pragma.
8401 if Is_Imported (Def_Id)
8402 and then Present (First_Rep_Item (Def_Id))
8403 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
8405 Pragma_Name (First_Rep_Item (Def_Id)) = Name_Interface
8409 Set_Imported (Def_Id);
8412 Set_Is_Public (Def_Id);
8413 Process_Interface_Name (Def_Id, Arg2, Arg3);
8416 -- Otherwise must be subprogram
8418 elsif not Is_Subprogram (Def_Id) then
8420 ("argument of pragma% is not subprogram", Arg1);
8423 Check_At_Most_N_Arguments (3);
8427 -- Loop through homonyms
8430 Def_Id := Get_Base_Subprogram (Hom_Id);
8432 if Is_Imported (Def_Id) then
8433 Process_Interface_Name (Def_Id, Arg2, Arg3);
8437 Hom_Id := Homonym (Hom_Id);
8439 exit when No (Hom_Id)
8440 or else Scope (Hom_Id) /= Current_Scope;
8445 ("argument of pragma% is not imported subprogram",
8451 -----------------------
8452 -- Interrupt_Handler --
8453 -----------------------
8455 -- pragma Interrupt_Handler (handler_NAME);
8457 when Pragma_Interrupt_Handler =>
8458 Check_Ada_83_Warning;
8459 Check_Arg_Count (1);
8460 Check_No_Identifiers;
8462 if No_Run_Time_Mode then
8463 Error_Msg_CRT ("Interrupt_Handler pragma", N);
8465 Check_Interrupt_Or_Attach_Handler;
8466 Process_Interrupt_Or_Attach_Handler;
8469 ------------------------
8470 -- Interrupt_Priority --
8471 ------------------------
8473 -- pragma Interrupt_Priority [(EXPRESSION)];
8475 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
8476 P : constant Node_Id := Parent (N);
8480 Check_Ada_83_Warning;
8482 if Arg_Count /= 0 then
8483 Arg := Expression (Arg1);
8484 Check_Arg_Count (1);
8485 Check_No_Identifiers;
8487 -- The expression must be analyzed in the special manner
8488 -- described in "Handling of Default and Per-Object
8489 -- Expressions" in sem.ads.
8491 Preanalyze_Spec_Expression (Arg, RTE (RE_Interrupt_Priority));
8494 if not Nkind_In (P, N_Task_Definition, N_Protected_Definition) then
8498 elsif Has_Priority_Pragma (P) then
8499 Error_Pragma ("duplicate pragma% not allowed");
8502 Set_Has_Priority_Pragma (P, True);
8503 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8505 end Interrupt_Priority;
8507 ---------------------
8508 -- Interrupt_State --
8509 ---------------------
8511 -- pragma Interrupt_State (
8512 -- [Name =>] INTERRUPT_ID,
8513 -- [State =>] INTERRUPT_STATE);
8515 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
8516 -- INTERRUPT_STATE => System | Runtime | User
8518 -- Note: if the interrupt id is given as an identifier, then it must
8519 -- be one of the identifiers in Ada.Interrupts.Names. Otherwise it is
8520 -- given as a static integer expression which must be in the range of
8521 -- Ada.Interrupts.Interrupt_ID.
8523 when Pragma_Interrupt_State => Interrupt_State : declare
8525 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
8526 -- This is the entity Ada.Interrupts.Interrupt_ID;
8528 State_Type : Character;
8529 -- Set to 's'/'r'/'u' for System/Runtime/User
8532 -- Index to entry in Interrupt_States table
8535 -- Value of interrupt
8537 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
8538 -- The first argument to the pragma
8540 Int_Ent : Entity_Id;
8541 -- Interrupt entity in Ada.Interrupts.Names
8545 Check_Arg_Order ((Name_Name, Name_State));
8546 Check_Arg_Count (2);
8548 Check_Optional_Identifier (Arg1, Name_Name);
8549 Check_Optional_Identifier (Arg2, Name_State);
8550 Check_Arg_Is_Identifier (Arg2);
8552 -- First argument is identifier
8554 if Nkind (Arg1X) = N_Identifier then
8556 -- Search list of names in Ada.Interrupts.Names
8558 Int_Ent := First_Entity (RTE (RE_Names));
8560 if No (Int_Ent) then
8561 Error_Pragma_Arg ("invalid interrupt name", Arg1);
8563 elsif Chars (Int_Ent) = Chars (Arg1X) then
8564 Int_Val := Expr_Value (Constant_Value (Int_Ent));
8568 Next_Entity (Int_Ent);
8571 -- First argument is not an identifier, so it must be a static
8572 -- expression of type Ada.Interrupts.Interrupt_ID.
8575 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
8576 Int_Val := Expr_Value (Arg1X);
8578 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
8580 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
8583 ("value not in range of type " &
8584 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
8590 case Chars (Get_Pragma_Arg (Arg2)) is
8591 when Name_Runtime => State_Type := 'r';
8592 when Name_System => State_Type := 's';
8593 when Name_User => State_Type := 'u';
8596 Error_Pragma_Arg ("invalid interrupt state", Arg2);
8599 -- Check if entry is already stored
8601 IST_Num := Interrupt_States.First;
8603 -- If entry not found, add it
8605 if IST_Num > Interrupt_States.Last then
8606 Interrupt_States.Append
8607 ((Interrupt_Number => UI_To_Int (Int_Val),
8608 Interrupt_State => State_Type,
8609 Pragma_Loc => Loc));
8612 -- Case of entry for the same entry
8614 elsif Int_Val = Interrupt_States.Table (IST_Num).
8617 -- If state matches, done, no need to make redundant entry
8620 State_Type = Interrupt_States.Table (IST_Num).
8623 -- Otherwise if state does not match, error
8626 Interrupt_States.Table (IST_Num).Pragma_Loc;
8628 ("state conflicts with that given #", Arg2);
8632 IST_Num := IST_Num + 1;
8634 end Interrupt_State;
8636 ----------------------
8637 -- Java_Constructor --
8638 ----------------------
8640 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
8642 -- Also handles pragma CIL_Constructor
8644 when Pragma_CIL_Constructor | Pragma_Java_Constructor =>
8645 Java_Constructor : declare
8649 Convention : Convention_Id;
8653 Check_Arg_Count (1);
8654 Check_Optional_Identifier (Arg1, Name_Entity);
8655 Check_Arg_Is_Local_Name (Arg1);
8657 Id := Expression (Arg1);
8658 Find_Program_Unit_Name (Id);
8660 -- If we did not find the name, we are done
8662 if Etype (Id) = Any_Type then
8667 when Pragma_CIL_Constructor => Convention := Convention_CIL;
8668 when Pragma_Java_Constructor => Convention := Convention_Java;
8669 when others => null;
8672 Hom_Id := Entity (Id);
8674 -- Loop through homonyms
8677 Def_Id := Get_Base_Subprogram (Hom_Id);
8679 -- The constructor is required to be a function returning an
8680 -- access type whose designated type has convention Java/CIL.
8682 if Ekind (Def_Id) = E_Function
8684 (Is_Value_Type (Etype (Def_Id))
8686 (Ekind (Etype (Def_Id)) = E_Access_Subprogram_Type
8688 Atree.Convention (Etype (Def_Id)) = Convention)
8690 (Ekind (Etype (Def_Id)) in Access_Kind
8693 (Designated_Type (Etype (Def_Id))) = Convention
8696 (Root_Type (Designated_Type (Etype (Def_Id)))) =
8699 Set_Is_Constructor (Def_Id);
8700 Set_Convention (Def_Id, Convention);
8701 Set_Is_Imported (Def_Id);
8704 if Convention = Convention_Java then
8706 ("pragma% requires function returning a " &
8707 "'Java access type", Arg1);
8709 pragma Assert (Convention = Convention_CIL);
8711 ("pragma% requires function returning a " &
8712 "'C'I'L access type", Arg1);
8716 Hom_Id := Homonym (Hom_Id);
8718 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
8720 end Java_Constructor;
8722 ----------------------
8723 -- Java_Interface --
8724 ----------------------
8726 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
8728 when Pragma_Java_Interface => Java_Interface : declare
8734 Check_Arg_Count (1);
8735 Check_Optional_Identifier (Arg1, Name_Entity);
8736 Check_Arg_Is_Local_Name (Arg1);
8738 Arg := Expression (Arg1);
8741 if Etype (Arg) = Any_Type then
8745 if not Is_Entity_Name (Arg)
8746 or else not Is_Type (Entity (Arg))
8748 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
8751 Typ := Underlying_Type (Entity (Arg));
8753 -- For now simply check some of the semantic constraints on the
8754 -- type. This currently leaves out some restrictions on interface
8755 -- types, namely that the parent type must be java.lang.Object.Typ
8756 -- and that all primitives of the type should be declared
8759 if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then
8760 Error_Pragma_Arg ("pragma% requires an abstract "
8761 & "tagged type", Arg1);
8763 elsif not Has_Discriminants (Typ)
8764 or else Ekind (Etype (First_Discriminant (Typ)))
8765 /= E_Anonymous_Access_Type
8767 not Is_Class_Wide_Type
8768 (Designated_Type (Etype (First_Discriminant (Typ))))
8771 ("type must have a class-wide access discriminant", Arg1);
8779 -- pragma Keep_Names ([On => ] local_NAME);
8781 when Pragma_Keep_Names => Keep_Names : declare
8786 Check_Arg_Count (1);
8787 Check_Optional_Identifier (Arg1, Name_On);
8788 Check_Arg_Is_Local_Name (Arg1);
8790 Arg := Expression (Arg1);
8793 if Etype (Arg) = Any_Type then
8797 if not Is_Entity_Name (Arg)
8798 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
8801 ("pragma% requires a local enumeration type", Arg1);
8804 Set_Discard_Names (Entity (Arg), False);
8811 -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
8813 when Pragma_License =>
8815 Check_Arg_Count (1);
8816 Check_No_Identifiers;
8817 Check_Valid_Configuration_Pragma;
8818 Check_Arg_Is_Identifier (Arg1);
8821 Sind : constant Source_File_Index :=
8822 Source_Index (Current_Sem_Unit);
8825 case Chars (Get_Pragma_Arg (Arg1)) is
8827 Set_License (Sind, GPL);
8829 when Name_Modified_GPL =>
8830 Set_License (Sind, Modified_GPL);
8832 when Name_Restricted =>
8833 Set_License (Sind, Restricted);
8835 when Name_Unrestricted =>
8836 Set_License (Sind, Unrestricted);
8839 Error_Pragma_Arg ("invalid license name", Arg1);
8847 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
8849 when Pragma_Link_With => Link_With : declare
8855 if Operating_Mode = Generate_Code
8856 and then In_Extended_Main_Source_Unit (N)
8858 Check_At_Least_N_Arguments (1);
8859 Check_No_Identifiers;
8860 Check_Is_In_Decl_Part_Or_Package_Spec;
8861 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8865 while Present (Arg) loop
8866 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8868 -- Store argument, converting sequences of spaces to a
8869 -- single null character (this is one of the differences
8870 -- in processing between Link_With and Linker_Options).
8873 C : constant Char_Code := Get_Char_Code (' ');
8874 S : constant String_Id :=
8875 Strval (Expr_Value_S (Expression (Arg)));
8876 L : constant Nat := String_Length (S);
8879 procedure Skip_Spaces;
8880 -- Advance F past any spaces
8886 procedure Skip_Spaces is
8888 while F <= L and then Get_String_Char (S, F) = C loop
8893 -- Start of processing for Arg_Store
8896 Skip_Spaces; -- skip leading spaces
8898 -- Loop through characters, changing any embedded
8899 -- sequence of spaces to a single null character (this
8900 -- is how Link_With/Linker_Options differ)
8903 if Get_String_Char (S, F) = C then
8906 Store_String_Char (ASCII.NUL);
8909 Store_String_Char (Get_String_Char (S, F));
8917 if Present (Arg) then
8918 Store_String_Char (ASCII.NUL);
8922 Store_Linker_Option_String (End_String);
8930 -- pragma Linker_Alias (
8931 -- [Entity =>] LOCAL_NAME
8932 -- [Target =>] static_string_EXPRESSION);
8934 when Pragma_Linker_Alias =>
8936 Check_Arg_Order ((Name_Entity, Name_Target));
8937 Check_Arg_Count (2);
8938 Check_Optional_Identifier (Arg1, Name_Entity);
8939 Check_Optional_Identifier (Arg2, Name_Target);
8940 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8941 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8943 -- The only processing required is to link this item on to the
8944 -- list of rep items for the given entity. This is accomplished
8945 -- by the call to Rep_Item_Too_Late (when no error is detected
8946 -- and False is returned).
8948 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8951 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8954 ------------------------
8955 -- Linker_Constructor --
8956 ------------------------
8958 -- pragma Linker_Constructor (procedure_LOCAL_NAME);
8960 -- Code is shared with Linker_Destructor
8962 -----------------------
8963 -- Linker_Destructor --
8964 -----------------------
8966 -- pragma Linker_Destructor (procedure_LOCAL_NAME);
8968 when Pragma_Linker_Constructor |
8969 Pragma_Linker_Destructor =>
8970 Linker_Constructor : declare
8976 Check_Arg_Count (1);
8977 Check_No_Identifiers;
8978 Check_Arg_Is_Local_Name (Arg1);
8979 Arg1_X := Expression (Arg1);
8981 Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
8983 if not Is_Library_Level_Entity (Proc) then
8985 ("argument for pragma% must be library level entity", Arg1);
8988 -- The only processing required is to link this item on to the
8989 -- list of rep items for the given entity. This is accomplished
8990 -- by the call to Rep_Item_Too_Late (when no error is detected
8991 -- and False is returned).
8993 if Rep_Item_Too_Late (Proc, N) then
8996 Set_Has_Gigi_Rep_Item (Proc);
8998 end Linker_Constructor;
9000 --------------------
9001 -- Linker_Options --
9002 --------------------
9004 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
9006 when Pragma_Linker_Options => Linker_Options : declare
9010 Check_Ada_83_Warning;
9011 Check_No_Identifiers;
9012 Check_Arg_Count (1);
9013 Check_Is_In_Decl_Part_Or_Package_Spec;
9014 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
9015 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
9018 while Present (Arg) loop
9019 Check_Arg_Is_Static_Expression (Arg, Standard_String);
9020 Store_String_Char (ASCII.NUL);
9021 Store_String_Chars (Strval (Expr_Value_S (Expression (Arg))));
9025 if Operating_Mode = Generate_Code
9026 and then In_Extended_Main_Source_Unit (N)
9028 Store_Linker_Option_String (End_String);
9032 --------------------
9033 -- Linker_Section --
9034 --------------------
9036 -- pragma Linker_Section (
9037 -- [Entity =>] LOCAL_NAME
9038 -- [Section =>] static_string_EXPRESSION);
9040 when Pragma_Linker_Section =>
9042 Check_Arg_Order ((Name_Entity, Name_Section));
9043 Check_Arg_Count (2);
9044 Check_Optional_Identifier (Arg1, Name_Entity);
9045 Check_Optional_Identifier (Arg2, Name_Section);
9046 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9047 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
9049 -- This pragma applies only to objects
9051 if not Is_Object (Entity (Expression (Arg1))) then
9052 Error_Pragma_Arg ("pragma% applies only to objects", Arg1);
9055 -- The only processing required is to link this item on to the
9056 -- list of rep items for the given entity. This is accomplished
9057 -- by the call to Rep_Item_Too_Late (when no error is detected
9058 -- and False is returned).
9060 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
9063 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
9070 -- pragma List (On | Off)
9072 -- There is nothing to do here, since we did all the processing for
9073 -- this pragma in Par.Prag (so that it works properly even in syntax
9079 --------------------
9080 -- Locking_Policy --
9081 --------------------
9083 -- pragma Locking_Policy (policy_IDENTIFIER);
9085 when Pragma_Locking_Policy => declare
9089 Check_Ada_83_Warning;
9090 Check_Arg_Count (1);
9091 Check_No_Identifiers;
9092 Check_Arg_Is_Locking_Policy (Arg1);
9093 Check_Valid_Configuration_Pragma;
9094 Get_Name_String (Chars (Expression (Arg1)));
9095 LP := Fold_Upper (Name_Buffer (1));
9097 if Locking_Policy /= ' '
9098 and then Locking_Policy /= LP
9100 Error_Msg_Sloc := Locking_Policy_Sloc;
9101 Error_Pragma ("locking policy incompatible with policy#");
9103 -- Set new policy, but always preserve System_Location since we
9104 -- like the error message with the run time name.
9107 Locking_Policy := LP;
9109 if Locking_Policy_Sloc /= System_Location then
9110 Locking_Policy_Sloc := Loc;
9119 -- pragma Long_Float (D_Float | G_Float);
9121 when Pragma_Long_Float =>
9123 Check_Valid_Configuration_Pragma;
9124 Check_Arg_Count (1);
9125 Check_No_Identifier (Arg1);
9126 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
9128 if not OpenVMS_On_Target then
9129 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
9134 if Chars (Expression (Arg1)) = Name_D_Float then
9135 if Opt.Float_Format_Long = 'G' then
9136 Error_Pragma ("G_Float previously specified");
9139 Opt.Float_Format_Long := 'D';
9141 -- G_Float case (this is the default, does not need overriding)
9144 if Opt.Float_Format_Long = 'D' then
9145 Error_Pragma ("D_Float previously specified");
9148 Opt.Float_Format_Long := 'G';
9151 Set_Standard_Fpt_Formats;
9153 -----------------------
9154 -- Machine_Attribute --
9155 -----------------------
9157 -- pragma Machine_Attribute (
9158 -- [Entity =>] LOCAL_NAME,
9159 -- [Attribute_Name =>] static_string_EXPRESSION
9160 -- [, [Info =>] static_EXPRESSION] );
9162 when Pragma_Machine_Attribute => Machine_Attribute : declare
9167 Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
9169 if Arg_Count = 3 then
9170 Check_Optional_Identifier (Arg3, Name_Info);
9171 Check_Arg_Is_Static_Expression (Arg3);
9173 Check_Arg_Count (2);
9176 Check_Optional_Identifier (Arg1, Name_Entity);
9177 Check_Optional_Identifier (Arg2, Name_Attribute_Name);
9178 Check_Arg_Is_Local_Name (Arg1);
9179 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
9180 Def_Id := Entity (Expression (Arg1));
9182 if Is_Access_Type (Def_Id) then
9183 Def_Id := Designated_Type (Def_Id);
9186 if Rep_Item_Too_Early (Def_Id, N) then
9190 Def_Id := Underlying_Type (Def_Id);
9192 -- The only processing required is to link this item on to the
9193 -- list of rep items for the given entity. This is accomplished
9194 -- by the call to Rep_Item_Too_Late (when no error is detected
9195 -- and False is returned).
9197 if Rep_Item_Too_Late (Def_Id, N) then
9200 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
9202 end Machine_Attribute;
9209 -- (MAIN_OPTION [, MAIN_OPTION]);
9212 -- [STACK_SIZE =>] static_integer_EXPRESSION
9213 -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION
9214 -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION
9216 when Pragma_Main => Main : declare
9217 Args : Args_List (1 .. 3);
9218 Names : constant Name_List (1 .. 3) := (
9220 Name_Task_Stack_Size_Default,
9221 Name_Time_Slicing_Enabled);
9227 Gather_Associations (Names, Args);
9229 for J in 1 .. 2 loop
9230 if Present (Args (J)) then
9231 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
9235 if Present (Args (3)) then
9236 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
9240 while Present (Nod) loop
9241 if Nkind (Nod) = N_Pragma
9242 and then Pragma_Name (Nod) = Name_Main
9244 Error_Msg_Name_1 := Pname;
9245 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9256 -- pragma Main_Storage
9257 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
9259 -- MAIN_STORAGE_OPTION ::=
9260 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
9261 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
9263 when Pragma_Main_Storage => Main_Storage : declare
9264 Args : Args_List (1 .. 2);
9265 Names : constant Name_List (1 .. 2) := (
9266 Name_Working_Storage,
9273 Gather_Associations (Names, Args);
9275 for J in 1 .. 2 loop
9276 if Present (Args (J)) then
9277 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
9281 Check_In_Main_Program;
9284 while Present (Nod) loop
9285 if Nkind (Nod) = N_Pragma
9286 and then Pragma_Name (Nod) = Name_Main_Storage
9288 Error_Msg_Name_1 := Pname;
9289 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9300 -- pragma Memory_Size (NUMERIC_LITERAL)
9302 when Pragma_Memory_Size =>
9305 -- Memory size is simply ignored
9307 Check_No_Identifiers;
9308 Check_Arg_Count (1);
9309 Check_Arg_Is_Integer_Literal (Arg1);
9317 -- The only correct use of this pragma is on its own in a file, in
9318 -- which case it is specially processed (see Gnat1drv.Check_Bad_Body
9319 -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to
9320 -- check for a file containing nothing but a No_Body pragma). If we
9321 -- attempt to process it during normal semantics processing, it means
9322 -- it was misplaced.
9324 when Pragma_No_Body =>
9332 -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
9334 when Pragma_No_Return => No_Return : declare
9342 Check_At_Least_N_Arguments (1);
9344 -- Loop through arguments of pragma
9347 while Present (Arg) loop
9348 Check_Arg_Is_Local_Name (Arg);
9349 Id := Expression (Arg);
9352 if not Is_Entity_Name (Id) then
9353 Error_Pragma_Arg ("entity name required", Arg);
9356 if Etype (Id) = Any_Type then
9360 -- Loop to find matching procedures
9365 and then Scope (E) = Current_Scope
9367 if Ekind_In (E, E_Procedure, E_Generic_Procedure) then
9370 -- Set flag on any alias as well
9372 if Is_Overloadable (E) and then Present (Alias (E)) then
9373 Set_No_Return (Alias (E));
9383 Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
9394 -- pragma No_Run_Time;
9396 -- Note: this pragma is retained for backwards compatibility. See
9397 -- body of Rtsfind for full details on its handling.
9399 when Pragma_No_Run_Time =>
9401 Check_Valid_Configuration_Pragma;
9402 Check_Arg_Count (0);
9404 No_Run_Time_Mode := True;
9405 Configurable_Run_Time_Mode := True;
9407 -- Set Duration to 32 bits if word size is 32
9409 if Ttypes.System_Word_Size = 32 then
9410 Duration_32_Bits_On_Target := True;
9413 -- Set appropriate restrictions
9415 Set_Restriction (No_Finalization, N);
9416 Set_Restriction (No_Exception_Handlers, N);
9417 Set_Restriction (Max_Tasks, N, 0);
9418 Set_Restriction (No_Tasking, N);
9420 ------------------------
9421 -- No_Strict_Aliasing --
9422 ------------------------
9424 -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
9426 when Pragma_No_Strict_Aliasing => No_Strict_Aliasing : declare
9431 Check_At_Most_N_Arguments (1);
9433 if Arg_Count = 0 then
9434 Check_Valid_Configuration_Pragma;
9435 Opt.No_Strict_Aliasing := True;
9438 Check_Optional_Identifier (Arg2, Name_Entity);
9439 Check_Arg_Is_Local_Name (Arg1);
9440 E_Id := Entity (Expression (Arg1));
9442 if E_Id = Any_Type then
9444 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
9445 Error_Pragma_Arg ("pragma% requires access type", Arg1);
9448 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
9450 end No_Strict_Aliasing;
9452 -----------------------
9453 -- Normalize_Scalars --
9454 -----------------------
9456 -- pragma Normalize_Scalars;
9458 when Pragma_Normalize_Scalars =>
9459 Check_Ada_83_Warning;
9460 Check_Arg_Count (0);
9461 Check_Valid_Configuration_Pragma;
9463 -- Normalize_Scalars creates false positives in CodePeer, so
9464 -- ignore this pragma in this mode.
9466 if not CodePeer_Mode then
9467 Normalize_Scalars := True;
9468 Init_Or_Norm_Scalars := True;
9475 -- pragma Obsolescent;
9477 -- pragma Obsolescent (
9478 -- [Message =>] static_string_EXPRESSION
9479 -- [,[Version =>] Ada_05]]);
9481 -- pragma Obsolescent (
9483 -- [,[Message =>] static_string_EXPRESSION
9484 -- [,[Version =>] Ada_05]] );
9486 when Pragma_Obsolescent => Obsolescent : declare
9490 procedure Set_Obsolescent (E : Entity_Id);
9491 -- Given an entity Ent, mark it as obsolescent if appropriate
9493 ---------------------
9494 -- Set_Obsolescent --
9495 ---------------------
9497 procedure Set_Obsolescent (E : Entity_Id) is
9506 -- Entity name was given
9508 if Present (Ename) then
9510 -- If entity name matches, we are fine. Save entity in
9511 -- pragma argument, for ASIS use.
9513 if Chars (Ename) = Chars (Ent) then
9514 Set_Entity (Ename, Ent);
9515 Generate_Reference (Ent, Ename);
9517 -- If entity name does not match, only possibility is an
9518 -- enumeration literal from an enumeration type declaration.
9520 elsif Ekind (Ent) /= E_Enumeration_Type then
9522 ("pragma % entity name does not match declaration");
9525 Ent := First_Literal (E);
9529 ("pragma % entity name does not match any " &
9530 "enumeration literal");
9532 elsif Chars (Ent) = Chars (Ename) then
9533 Set_Entity (Ename, Ent);
9534 Generate_Reference (Ent, Ename);
9538 Ent := Next_Literal (Ent);
9544 -- Ent points to entity to be marked
9546 if Arg_Count >= 1 then
9548 -- Deal with static string argument
9550 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
9551 S := Strval (Expression (Arg1));
9553 for J in 1 .. String_Length (S) loop
9554 if not In_Character_Range (Get_String_Char (S, J)) then
9556 ("pragma% argument does not allow wide characters",
9561 Obsolescent_Warnings.Append
9562 ((Ent => Ent, Msg => Strval (Expression (Arg1))));
9564 -- Check for Ada_05 parameter
9566 if Arg_Count /= 1 then
9567 Check_Arg_Count (2);
9570 Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
9573 Check_Arg_Is_Identifier (Argx);
9575 if Chars (Argx) /= Name_Ada_05 then
9576 Error_Msg_Name_2 := Name_Ada_05;
9578 ("only allowed argument for pragma% is %", Argx);
9581 if Ada_Version_Explicit < Ada_05
9582 or else not Warn_On_Ada_2005_Compatibility
9590 -- Set flag if pragma active
9593 Set_Is_Obsolescent (Ent);
9597 end Set_Obsolescent;
9599 -- Start of processing for pragma Obsolescent
9604 Check_At_Most_N_Arguments (3);
9606 -- See if first argument specifies an entity name
9610 (Chars (Arg1) = Name_Entity
9612 Nkind_In (Get_Pragma_Arg (Arg1), N_Character_Literal,
9616 Ename := Get_Pragma_Arg (Arg1);
9618 -- Eliminate first argument, so we can share processing
9622 Arg_Count := Arg_Count - 1;
9624 -- No Entity name argument given
9630 if Arg_Count >= 1 then
9631 Check_Optional_Identifier (Arg1, Name_Message);
9633 if Arg_Count = 2 then
9634 Check_Optional_Identifier (Arg2, Name_Version);
9638 -- Get immediately preceding declaration
9641 while Present (Decl) and then Nkind (Decl) = N_Pragma loop
9645 -- Cases where we do not follow anything other than another pragma
9649 -- First case: library level compilation unit declaration with
9650 -- the pragma immediately following the declaration.
9652 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
9654 (Defining_Entity (Unit (Parent (Parent (N)))));
9657 -- Case 2: library unit placement for package
9661 Ent : constant Entity_Id := Find_Lib_Unit_Name;
9663 if Is_Package_Or_Generic_Package (Ent) then
9664 Set_Obsolescent (Ent);
9670 -- Cases where we must follow a declaration
9673 if Nkind (Decl) not in N_Declaration
9674 and then Nkind (Decl) not in N_Later_Decl_Item
9675 and then Nkind (Decl) not in N_Generic_Declaration
9676 and then Nkind (Decl) not in N_Renaming_Declaration
9679 ("pragma% misplaced, "
9680 & "must immediately follow a declaration");
9683 Set_Obsolescent (Defining_Entity (Decl));
9693 -- pragma Optimize (Time | Space | Off);
9695 -- The actual check for optimize is done in Gigi. Note that this
9696 -- pragma does not actually change the optimization setting, it
9697 -- simply checks that it is consistent with the pragma.
9699 when Pragma_Optimize =>
9700 Check_No_Identifiers;
9701 Check_Arg_Count (1);
9702 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
9704 ------------------------
9705 -- Optimize_Alignment --
9706 ------------------------
9708 -- pragma Optimize_Alignment (Time | Space | Off);
9710 when Pragma_Optimize_Alignment =>
9712 Check_No_Identifiers;
9713 Check_Arg_Count (1);
9714 Check_Valid_Configuration_Pragma;
9717 Nam : constant Name_Id := Chars (Get_Pragma_Arg (Arg1));
9721 Opt.Optimize_Alignment := 'T';
9723 Opt.Optimize_Alignment := 'S';
9725 Opt.Optimize_Alignment := 'O';
9727 Error_Pragma_Arg ("invalid argument for pragma%", Arg1);
9731 -- Set indication that mode is set locally. If we are in fact in a
9732 -- configuration pragma file, this setting is harmless since the
9733 -- switch will get reset anyway at the start of each unit.
9735 Optimize_Alignment_Local := True;
9741 -- pragma Pack (first_subtype_LOCAL_NAME);
9743 when Pragma_Pack => Pack : declare
9744 Assoc : constant Node_Id := Arg1;
9749 Check_No_Identifiers;
9750 Check_Arg_Count (1);
9751 Check_Arg_Is_Local_Name (Arg1);
9753 Type_Id := Expression (Assoc);
9754 Find_Type (Type_Id);
9755 Typ := Entity (Type_Id);
9758 or else Rep_Item_Too_Early (Typ, N)
9762 Typ := Underlying_Type (Typ);
9765 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
9766 Error_Pragma ("pragma% must specify array or record type");
9769 Check_First_Subtype (Arg1);
9771 if Has_Pragma_Pack (Typ) then
9772 Error_Pragma ("duplicate pragma%, only one allowed");
9776 elsif Is_Array_Type (Typ) then
9778 -- Pack not allowed for aliased or atomic components
9780 if Has_Aliased_Components (Base_Type (Typ)) then
9782 ("pragma% ignored, cannot pack aliased components?");
9784 elsif Has_Atomic_Components (Typ)
9785 or else Is_Atomic (Component_Type (Typ))
9788 ("?pragma% ignored, cannot pack atomic components");
9791 -- If we had an explicit component size given, then we do not
9792 -- let Pack override this given size. We also give a warning
9793 -- that Pack is being ignored unless we can tell for sure that
9794 -- the Pack would not have had any effect anyway.
9796 if Has_Component_Size_Clause (Typ) then
9797 if Known_Static_RM_Size (Component_Type (Typ))
9799 RM_Size (Component_Type (Typ)) = Component_Size (Typ)
9804 ("?pragma% ignored, explicit component size given");
9807 -- If no prior array component size given, Pack is effective
9810 if not Rep_Item_Too_Late (Typ, N) then
9812 -- In the context of static code analysis, we do not need
9813 -- complex front-end expansions related to pragma Pack,
9814 -- so disable handling of pragma Pack in this case.
9816 if CodePeer_Mode then
9819 -- For normal non-VM target, do the packing
9821 elsif VM_Target = No_VM then
9822 Set_Is_Packed (Base_Type (Typ));
9823 Set_Has_Pragma_Pack (Base_Type (Typ));
9824 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9826 -- If we ignore the pack, then warn about this, except
9827 -- that we suppress the warning in GNAT mode.
9829 elsif not GNAT_Mode then
9831 ("?pragma% ignored in this configuration");
9836 -- For record types, the pack is always effective
9838 else pragma Assert (Is_Record_Type (Typ));
9839 if not Rep_Item_Too_Late (Typ, N) then
9840 if VM_Target = No_VM then
9841 Set_Is_Packed (Base_Type (Typ));
9842 Set_Has_Pragma_Pack (Base_Type (Typ));
9843 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9845 elsif not GNAT_Mode then
9846 Error_Pragma ("?pragma% ignored in this configuration");
9858 -- There is nothing to do here, since we did all the processing for
9859 -- this pragma in Par.Prag (so that it works properly even in syntax
9869 -- pragma Passive [(PASSIVE_FORM)];
9871 -- PASSIVE_FORM ::= Semaphore | No
9873 when Pragma_Passive =>
9876 if Nkind (Parent (N)) /= N_Task_Definition then
9877 Error_Pragma ("pragma% must be within task definition");
9880 if Arg_Count /= 0 then
9881 Check_Arg_Count (1);
9882 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
9885 ----------------------------------
9886 -- Preelaborable_Initialization --
9887 ----------------------------------
9889 -- pragma Preelaborable_Initialization (DIRECT_NAME);
9891 when Pragma_Preelaborable_Initialization => Preelab_Init : declare
9896 Check_Arg_Count (1);
9897 Check_No_Identifiers;
9898 Check_Arg_Is_Identifier (Arg1);
9899 Check_Arg_Is_Local_Name (Arg1);
9900 Check_First_Subtype (Arg1);
9901 Ent := Entity (Expression (Arg1));
9903 if not Is_Private_Type (Ent)
9904 and then not Is_Protected_Type (Ent)
9907 ("pragma % can only be applied to private or protected type",
9911 -- Give an error if the pragma is applied to a protected type that
9912 -- does not qualify (due to having entries, or due to components
9913 -- that do not qualify).
9915 if Is_Protected_Type (Ent)
9916 and then not Has_Preelaborable_Initialization (Ent)
9919 ("protected type & does not have preelaborable " &
9920 "initialization", Ent);
9922 -- Otherwise mark the type as definitely having preelaborable
9926 Set_Known_To_Have_Preelab_Init (Ent);
9929 if Has_Pragma_Preelab_Init (Ent)
9930 and then Warn_On_Redundant_Constructs
9932 Error_Pragma ("?duplicate pragma%!");
9934 Set_Has_Pragma_Preelab_Init (Ent);
9938 --------------------
9939 -- Persistent_BSS --
9940 --------------------
9942 when Pragma_Persistent_BSS => Persistent_BSS : declare
9949 Check_At_Most_N_Arguments (1);
9951 -- Case of application to specific object (one argument)
9953 if Arg_Count = 1 then
9954 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9956 if not Is_Entity_Name (Expression (Arg1))
9958 (Ekind (Entity (Expression (Arg1))) /= E_Variable
9959 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
9961 Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
9964 Ent := Entity (Expression (Arg1));
9965 Decl := Parent (Ent);
9967 if Rep_Item_Too_Late (Ent, N) then
9971 if Present (Expression (Decl)) then
9973 ("object for pragma% cannot have initialization", Arg1);
9976 if not Is_Potentially_Persistent_Type (Etype (Ent)) then
9978 ("object type for pragma% is not potentially persistent",
9983 Make_Linker_Section_Pragma
9984 (Ent, Sloc (N), ".persistent.bss");
9985 Insert_After (N, Prag);
9988 -- Case of use as configuration pragma with no arguments
9991 Check_Valid_Configuration_Pragma;
9992 Persistent_BSS_Mode := True;
10000 -- pragma Polling (ON | OFF);
10002 when Pragma_Polling =>
10004 Check_Arg_Count (1);
10005 Check_No_Identifiers;
10006 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
10007 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
10009 -------------------
10010 -- Postcondition --
10011 -------------------
10013 -- pragma Postcondition ([Check =>] Boolean_Expression
10014 -- [,[Message =>] String_Expression]);
10016 when Pragma_Postcondition => Postcondition : declare
10018 pragma Warnings (Off, In_Body);
10022 Check_At_Least_N_Arguments (1);
10023 Check_At_Most_N_Arguments (2);
10024 Check_Optional_Identifier (Arg1, Name_Check);
10026 -- All we need to do here is call the common check procedure,
10027 -- the remainder of the processing is found in Sem_Ch6/Sem_Ch7.
10029 Check_Precondition_Postcondition (In_Body);
10036 -- pragma Precondition ([Check =>] Boolean_Expression
10037 -- [,[Message =>] String_Expression]);
10039 when Pragma_Precondition => Precondition : declare
10044 Check_At_Least_N_Arguments (1);
10045 Check_At_Most_N_Arguments (2);
10046 Check_Optional_Identifier (Arg1, Name_Check);
10048 Check_Precondition_Postcondition (In_Body);
10050 -- If in spec, nothing more to do. If in body, then we convert the
10051 -- pragma to pragma Check (Precondition, cond [, msg]). Note we do
10052 -- this whether or not precondition checks are enabled. That works
10053 -- fine since pragma Check will do this check, and will also
10054 -- analyze the condition itself in the proper context.
10057 if Arg_Count = 2 then
10058 Check_Optional_Identifier (Arg3, Name_Message);
10059 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
10064 Chars => Name_Check,
10065 Pragma_Argument_Associations => New_List (
10066 Make_Pragma_Argument_Association (Loc,
10068 Make_Identifier (Loc,
10069 Chars => Name_Precondition)),
10071 Make_Pragma_Argument_Association (Sloc (Arg1),
10072 Expression => Relocate_Node (Get_Pragma_Arg (Arg1))))));
10074 if Arg_Count = 2 then
10075 Append_To (Pragma_Argument_Associations (N),
10076 Make_Pragma_Argument_Association (Sloc (Arg2),
10077 Expression => Relocate_Node (Get_Pragma_Arg (Arg2))));
10088 -- pragma Preelaborate [(library_unit_NAME)];
10090 -- Set the flag Is_Preelaborated of program unit name entity
10092 when Pragma_Preelaborate => Preelaborate : declare
10093 Pa : constant Node_Id := Parent (N);
10094 Pk : constant Node_Kind := Nkind (Pa);
10098 Check_Ada_83_Warning;
10099 Check_Valid_Library_Unit_Pragma;
10101 if Nkind (N) = N_Null_Statement then
10105 Ent := Find_Lib_Unit_Name;
10107 -- This filters out pragmas inside generic parent then
10108 -- show up inside instantiation
10111 and then not (Pk = N_Package_Specification
10112 and then Present (Generic_Parent (Pa)))
10114 if not Debug_Flag_U then
10115 Set_Is_Preelaborated (Ent);
10116 Set_Suppress_Elaboration_Warnings (Ent);
10121 ---------------------
10122 -- Preelaborate_05 --
10123 ---------------------
10125 -- pragma Preelaborate_05 [(library_unit_NAME)];
10127 -- This pragma is useable only in GNAT_Mode, where it is used like
10128 -- pragma Preelaborate but it is only effective in Ada 2005 mode
10129 -- (otherwise it is ignored). This is used to implement AI-362 which
10130 -- recategorizes some run-time packages in Ada 2005 mode.
10132 when Pragma_Preelaborate_05 => Preelaborate_05 : declare
10137 Check_Valid_Library_Unit_Pragma;
10139 if not GNAT_Mode then
10140 Error_Pragma ("pragma% only available in GNAT mode");
10143 if Nkind (N) = N_Null_Statement then
10147 -- This is one of the few cases where we need to test the value of
10148 -- Ada_Version_Explicit rather than Ada_Version (which is always
10149 -- set to Ada_12 in a predefined unit), we need to know the
10150 -- explicit version set to know if this pragma is active.
10152 if Ada_Version_Explicit >= Ada_05 then
10153 Ent := Find_Lib_Unit_Name;
10154 Set_Is_Preelaborated (Ent);
10155 Set_Suppress_Elaboration_Warnings (Ent);
10157 end Preelaborate_05;
10163 -- pragma Priority (EXPRESSION);
10165 when Pragma_Priority => Priority : declare
10166 P : constant Node_Id := Parent (N);
10170 Check_No_Identifiers;
10171 Check_Arg_Count (1);
10175 if Nkind (P) = N_Subprogram_Body then
10176 Check_In_Main_Program;
10178 Arg := Expression (Arg1);
10179 Analyze_And_Resolve (Arg, Standard_Integer);
10183 if not Is_Static_Expression (Arg) then
10184 Flag_Non_Static_Expr
10185 ("main subprogram priority is not static!", Arg);
10188 -- If constraint error, then we already signalled an error
10190 elsif Raises_Constraint_Error (Arg) then
10193 -- Otherwise check in range
10197 Val : constant Uint := Expr_Value (Arg);
10201 or else Val > Expr_Value (Expression
10202 (Parent (RTE (RE_Max_Priority))))
10205 ("main subprogram priority is out of range", Arg1);
10211 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
10213 -- Load an arbitrary entity from System.Tasking to make sure
10214 -- this package is implicitly with'ed, since we need to have
10215 -- the tasking run-time active for the pragma Priority to have
10219 Discard : Entity_Id;
10220 pragma Warnings (Off, Discard);
10222 Discard := RTE (RE_Task_List);
10225 -- Task or Protected, must be of type Integer
10227 elsif Nkind_In (P, N_Protected_Definition, N_Task_Definition) then
10228 Arg := Expression (Arg1);
10230 -- The expression must be analyzed in the special manner
10231 -- described in "Handling of Default and Per-Object
10232 -- Expressions" in sem.ads.
10234 Preanalyze_Spec_Expression (Arg, Standard_Integer);
10236 if not Is_Static_Expression (Arg) then
10237 Check_Restriction (Static_Priorities, Arg);
10240 -- Anything else is incorrect
10246 if Has_Priority_Pragma (P) then
10247 Error_Pragma ("duplicate pragma% not allowed");
10249 Set_Has_Priority_Pragma (P, True);
10251 if Nkind_In (P, N_Protected_Definition, N_Task_Definition) then
10252 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10253 -- exp_ch9 should use this ???
10258 -----------------------------------
10259 -- Priority_Specific_Dispatching --
10260 -----------------------------------
10262 -- pragma Priority_Specific_Dispatching (
10263 -- policy_IDENTIFIER,
10264 -- first_priority_EXPRESSION,
10265 -- last_priority_EXPRESSION);
10267 when Pragma_Priority_Specific_Dispatching =>
10268 Priority_Specific_Dispatching : declare
10269 Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
10270 -- This is the entity System.Any_Priority;
10273 Lower_Bound : Node_Id;
10274 Upper_Bound : Node_Id;
10280 Check_Arg_Count (3);
10281 Check_No_Identifiers;
10282 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
10283 Check_Valid_Configuration_Pragma;
10284 Get_Name_String (Chars (Expression (Arg1)));
10285 DP := Fold_Upper (Name_Buffer (1));
10287 Lower_Bound := Expression (Arg2);
10288 Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
10289 Lower_Val := Expr_Value (Lower_Bound);
10291 Upper_Bound := Expression (Arg3);
10292 Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
10293 Upper_Val := Expr_Value (Upper_Bound);
10295 -- It is not allowed to use Task_Dispatching_Policy and
10296 -- Priority_Specific_Dispatching in the same partition.
10298 if Task_Dispatching_Policy /= ' ' then
10299 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
10301 ("pragma% incompatible with Task_Dispatching_Policy#");
10303 -- Check lower bound in range
10305 elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
10307 Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
10310 ("first_priority is out of range", Arg2);
10312 -- Check upper bound in range
10314 elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
10316 Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
10319 ("last_priority is out of range", Arg3);
10321 -- Check that the priority range is valid
10323 elsif Lower_Val > Upper_Val then
10325 ("last_priority_expression must be greater than" &
10326 " or equal to first_priority_expression");
10328 -- Store the new policy, but always preserve System_Location since
10329 -- we like the error message with the run-time name.
10332 -- Check overlapping in the priority ranges specified in other
10333 -- Priority_Specific_Dispatching pragmas within the same
10334 -- partition. We can only check those we know about!
10337 Specific_Dispatching.First .. Specific_Dispatching.Last
10339 if Specific_Dispatching.Table (J).First_Priority in
10340 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
10341 or else Specific_Dispatching.Table (J).Last_Priority in
10342 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
10345 Specific_Dispatching.Table (J).Pragma_Loc;
10347 ("priority range overlaps with "
10348 & "Priority_Specific_Dispatching#");
10352 -- The use of Priority_Specific_Dispatching is incompatible
10353 -- with Task_Dispatching_Policy.
10355 if Task_Dispatching_Policy /= ' ' then
10356 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
10358 ("Priority_Specific_Dispatching incompatible "
10359 & "with Task_Dispatching_Policy#");
10362 -- The use of Priority_Specific_Dispatching forces ceiling
10365 if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
10366 Error_Msg_Sloc := Locking_Policy_Sloc;
10368 ("Priority_Specific_Dispatching incompatible "
10369 & "with Locking_Policy#");
10371 -- Set the Ceiling_Locking policy, but preserve System_Location
10372 -- since we like the error message with the run time name.
10375 Locking_Policy := 'C';
10377 if Locking_Policy_Sloc /= System_Location then
10378 Locking_Policy_Sloc := Loc;
10382 -- Add entry in the table
10384 Specific_Dispatching.Append
10385 ((Dispatching_Policy => DP,
10386 First_Priority => UI_To_Int (Lower_Val),
10387 Last_Priority => UI_To_Int (Upper_Val),
10388 Pragma_Loc => Loc));
10390 end Priority_Specific_Dispatching;
10396 -- pragma Profile (profile_IDENTIFIER);
10398 -- profile_IDENTIFIER => Restricted | Ravenscar
10400 when Pragma_Profile =>
10402 Check_Arg_Count (1);
10403 Check_Valid_Configuration_Pragma;
10404 Check_No_Identifiers;
10407 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
10409 if Chars (Argx) = Name_Ravenscar then
10410 Set_Ravenscar_Profile (N);
10411 elsif Chars (Argx) = Name_Restricted then
10412 Set_Profile_Restrictions
10413 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
10415 Error_Pragma_Arg ("& is not a valid profile", Argx);
10419 ----------------------
10420 -- Profile_Warnings --
10421 ----------------------
10423 -- pragma Profile_Warnings (profile_IDENTIFIER);
10425 -- profile_IDENTIFIER => Restricted | Ravenscar
10427 when Pragma_Profile_Warnings =>
10429 Check_Arg_Count (1);
10430 Check_Valid_Configuration_Pragma;
10431 Check_No_Identifiers;
10434 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
10436 if Chars (Argx) = Name_Ravenscar then
10437 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
10438 elsif Chars (Argx) = Name_Restricted then
10439 Set_Profile_Restrictions (Restricted, N, Warn => True);
10441 Error_Pragma_Arg ("& is not a valid profile", Argx);
10445 --------------------------
10446 -- Propagate_Exceptions --
10447 --------------------------
10449 -- pragma Propagate_Exceptions;
10451 -- Note: this pragma is obsolete and has no effect
10453 when Pragma_Propagate_Exceptions =>
10455 Check_Arg_Count (0);
10457 if In_Extended_Main_Source_Unit (N) then
10458 Propagate_Exceptions := True;
10465 -- pragma Psect_Object (
10466 -- [Internal =>] LOCAL_NAME,
10467 -- [, [External =>] EXTERNAL_SYMBOL]
10468 -- [, [Size =>] EXTERNAL_SYMBOL]);
10470 when Pragma_Psect_Object | Pragma_Common_Object =>
10471 Psect_Object : declare
10472 Args : Args_List (1 .. 3);
10473 Names : constant Name_List (1 .. 3) := (
10478 Internal : Node_Id renames Args (1);
10479 External : Node_Id renames Args (2);
10480 Size : Node_Id renames Args (3);
10482 Def_Id : Entity_Id;
10484 procedure Check_Too_Long (Arg : Node_Id);
10485 -- Posts message if the argument is an identifier with more
10486 -- than 31 characters, or a string literal with more than
10487 -- 31 characters, and we are operating under VMS
10489 --------------------
10490 -- Check_Too_Long --
10491 --------------------
10493 procedure Check_Too_Long (Arg : Node_Id) is
10494 X : constant Node_Id := Original_Node (Arg);
10497 if not Nkind_In (X, N_String_Literal, N_Identifier) then
10499 ("inappropriate argument for pragma %", Arg);
10502 if OpenVMS_On_Target then
10503 if (Nkind (X) = N_String_Literal
10504 and then String_Length (Strval (X)) > 31)
10506 (Nkind (X) = N_Identifier
10507 and then Length_Of_Name (Chars (X)) > 31)
10510 ("argument for pragma % is longer than 31 characters",
10514 end Check_Too_Long;
10516 -- Start of processing for Common_Object/Psect_Object
10520 Gather_Associations (Names, Args);
10521 Process_Extended_Import_Export_Internal_Arg (Internal);
10523 Def_Id := Entity (Internal);
10525 if not Ekind_In (Def_Id, E_Constant, E_Variable) then
10527 ("pragma% must designate an object", Internal);
10530 Check_Too_Long (Internal);
10532 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
10534 ("cannot use pragma% for imported/exported object",
10538 if Is_Concurrent_Type (Etype (Internal)) then
10540 ("cannot specify pragma % for task/protected object",
10544 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
10546 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
10548 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
10551 if Ekind (Def_Id) = E_Constant then
10553 ("cannot specify pragma % for a constant", Internal);
10556 if Is_Record_Type (Etype (Internal)) then
10562 Ent := First_Entity (Etype (Internal));
10563 while Present (Ent) loop
10564 Decl := Declaration_Node (Ent);
10566 if Ekind (Ent) = E_Component
10567 and then Nkind (Decl) = N_Component_Declaration
10568 and then Present (Expression (Decl))
10569 and then Warn_On_Export_Import
10572 ("?object for pragma % has defaults", Internal);
10582 if Present (Size) then
10583 Check_Too_Long (Size);
10586 if Present (External) then
10587 Check_Arg_Is_External_Name (External);
10588 Check_Too_Long (External);
10591 -- If all error tests pass, link pragma on to the rep item chain
10593 Record_Rep_Item (Def_Id, N);
10600 -- pragma Pure [(library_unit_NAME)];
10602 when Pragma_Pure => Pure : declare
10606 Check_Ada_83_Warning;
10607 Check_Valid_Library_Unit_Pragma;
10609 if Nkind (N) = N_Null_Statement then
10613 Ent := Find_Lib_Unit_Name;
10615 Set_Has_Pragma_Pure (Ent);
10616 Set_Suppress_Elaboration_Warnings (Ent);
10623 -- pragma Pure_05 [(library_unit_NAME)];
10625 -- This pragma is useable only in GNAT_Mode, where it is used like
10626 -- pragma Pure but it is only effective in Ada 2005 mode (otherwise
10627 -- it is ignored). It may be used after a pragma Preelaborate, in
10628 -- which case it overrides the effect of the pragma Preelaborate.
10629 -- This is used to implement AI-362 which recategorizes some run-time
10630 -- packages in Ada 2005 mode.
10632 when Pragma_Pure_05 => Pure_05 : declare
10637 Check_Valid_Library_Unit_Pragma;
10639 if not GNAT_Mode then
10640 Error_Pragma ("pragma% only available in GNAT mode");
10643 if Nkind (N) = N_Null_Statement then
10647 -- This is one of the few cases where we need to test the value of
10648 -- Ada_Version_Explicit rather than Ada_Version (which is always
10649 -- set to Ada_12 in a predefined unit), we need to know the
10650 -- explicit version set to know if this pragma is active.
10652 if Ada_Version_Explicit >= Ada_05 then
10653 Ent := Find_Lib_Unit_Name;
10654 Set_Is_Preelaborated (Ent, False);
10656 Set_Suppress_Elaboration_Warnings (Ent);
10660 -------------------
10661 -- Pure_Function --
10662 -------------------
10664 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
10666 when Pragma_Pure_Function => Pure_Function : declare
10669 Def_Id : Entity_Id;
10670 Effective : Boolean := False;
10674 Check_Arg_Count (1);
10675 Check_Optional_Identifier (Arg1, Name_Entity);
10676 Check_Arg_Is_Local_Name (Arg1);
10677 E_Id := Expression (Arg1);
10679 if Error_Posted (E_Id) then
10683 -- Loop through homonyms (overloadings) of referenced entity
10685 E := Entity (E_Id);
10687 if Present (E) then
10689 Def_Id := Get_Base_Subprogram (E);
10691 if not Ekind_In (Def_Id, E_Function,
10692 E_Generic_Function,
10696 ("pragma% requires a function name", Arg1);
10699 Set_Is_Pure (Def_Id);
10701 if not Has_Pragma_Pure_Function (Def_Id) then
10702 Set_Has_Pragma_Pure_Function (Def_Id);
10707 exit when No (E) or else Scope (E) /= Current_Scope;
10711 and then Warn_On_Redundant_Constructs
10714 ("pragma Pure_Function on& is redundant?",
10720 --------------------
10721 -- Queuing_Policy --
10722 --------------------
10724 -- pragma Queuing_Policy (policy_IDENTIFIER);
10726 when Pragma_Queuing_Policy => declare
10730 Check_Ada_83_Warning;
10731 Check_Arg_Count (1);
10732 Check_No_Identifiers;
10733 Check_Arg_Is_Queuing_Policy (Arg1);
10734 Check_Valid_Configuration_Pragma;
10735 Get_Name_String (Chars (Expression (Arg1)));
10736 QP := Fold_Upper (Name_Buffer (1));
10738 if Queuing_Policy /= ' '
10739 and then Queuing_Policy /= QP
10741 Error_Msg_Sloc := Queuing_Policy_Sloc;
10742 Error_Pragma ("queuing policy incompatible with policy#");
10744 -- Set new policy, but always preserve System_Location since we
10745 -- like the error message with the run time name.
10748 Queuing_Policy := QP;
10750 if Queuing_Policy_Sloc /= System_Location then
10751 Queuing_Policy_Sloc := Loc;
10756 -----------------------
10757 -- Relative_Deadline --
10758 -----------------------
10760 -- pragma Relative_Deadline (time_span_EXPRESSION);
10762 when Pragma_Relative_Deadline => Relative_Deadline : declare
10763 P : constant Node_Id := Parent (N);
10768 Check_No_Identifiers;
10769 Check_Arg_Count (1);
10771 Arg := Expression (Arg1);
10773 -- The expression must be analyzed in the special manner described
10774 -- in "Handling of Default and Per-Object Expressions" in sem.ads.
10776 Preanalyze_Spec_Expression (Arg, RTE (RE_Time_Span));
10780 if Nkind (P) = N_Subprogram_Body then
10781 Check_In_Main_Program;
10785 elsif Nkind (P) = N_Task_Definition then
10788 -- Anything else is incorrect
10794 if Has_Relative_Deadline_Pragma (P) then
10795 Error_Pragma ("duplicate pragma% not allowed");
10797 Set_Has_Relative_Deadline_Pragma (P, True);
10799 if Nkind (P) = N_Task_Definition then
10800 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10803 end Relative_Deadline;
10805 ---------------------------
10806 -- Remote_Call_Interface --
10807 ---------------------------
10809 -- pragma Remote_Call_Interface [(library_unit_NAME)];
10811 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
10812 Cunit_Node : Node_Id;
10813 Cunit_Ent : Entity_Id;
10817 Check_Ada_83_Warning;
10818 Check_Valid_Library_Unit_Pragma;
10820 if Nkind (N) = N_Null_Statement then
10824 Cunit_Node := Cunit (Current_Sem_Unit);
10825 K := Nkind (Unit (Cunit_Node));
10826 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10828 if K = N_Package_Declaration
10829 or else K = N_Generic_Package_Declaration
10830 or else K = N_Subprogram_Declaration
10831 or else K = N_Generic_Subprogram_Declaration
10832 or else (K = N_Subprogram_Body
10833 and then Acts_As_Spec (Unit (Cunit_Node)))
10838 "pragma% must apply to package or subprogram declaration");
10841 Set_Is_Remote_Call_Interface (Cunit_Ent);
10842 end Remote_Call_Interface;
10848 -- pragma Remote_Types [(library_unit_NAME)];
10850 when Pragma_Remote_Types => Remote_Types : declare
10851 Cunit_Node : Node_Id;
10852 Cunit_Ent : Entity_Id;
10855 Check_Ada_83_Warning;
10856 Check_Valid_Library_Unit_Pragma;
10858 if Nkind (N) = N_Null_Statement then
10862 Cunit_Node := Cunit (Current_Sem_Unit);
10863 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10865 if not Nkind_In (Unit (Cunit_Node), N_Package_Declaration,
10866 N_Generic_Package_Declaration)
10869 ("pragma% can only apply to a package declaration");
10872 Set_Is_Remote_Types (Cunit_Ent);
10879 -- pragma Ravenscar;
10881 when Pragma_Ravenscar =>
10883 Check_Arg_Count (0);
10884 Check_Valid_Configuration_Pragma;
10885 Set_Ravenscar_Profile (N);
10887 if Warn_On_Obsolescent_Feature then
10888 Error_Msg_N ("pragma Ravenscar is an obsolescent feature?", N);
10889 Error_Msg_N ("|use pragma Profile (Ravenscar) instead", N);
10892 -------------------------
10893 -- Restricted_Run_Time --
10894 -------------------------
10896 -- pragma Restricted_Run_Time;
10898 when Pragma_Restricted_Run_Time =>
10900 Check_Arg_Count (0);
10901 Check_Valid_Configuration_Pragma;
10902 Set_Profile_Restrictions
10903 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
10905 if Warn_On_Obsolescent_Feature then
10907 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
10908 Error_Msg_N ("|use pragma Profile (Restricted) instead", N);
10915 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
10918 -- restriction_IDENTIFIER
10919 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10921 when Pragma_Restrictions =>
10922 Process_Restrictions_Or_Restriction_Warnings
10923 (Warn => Treat_Restrictions_As_Warnings);
10925 --------------------------
10926 -- Restriction_Warnings --
10927 --------------------------
10929 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
10932 -- restriction_IDENTIFIER
10933 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10935 when Pragma_Restriction_Warnings =>
10937 Process_Restrictions_Or_Restriction_Warnings (Warn => True);
10943 -- pragma Reviewable;
10945 when Pragma_Reviewable =>
10946 Check_Ada_83_Warning;
10947 Check_Arg_Count (0);
10949 -- Call dummy debugging function rv. This is done to assist front
10950 -- end debugging. By placing a Reviewable pragma in the source
10951 -- program, a breakpoint on rv catches this place in the source,
10952 -- allowing convenient stepping to the point of interest.
10956 --------------------------
10957 -- Short_Circuit_And_Or --
10958 --------------------------
10960 when Pragma_Short_Circuit_And_Or =>
10962 Check_Arg_Count (0);
10963 Check_Valid_Configuration_Pragma;
10964 Short_Circuit_And_Or := True;
10966 -------------------
10967 -- Share_Generic --
10968 -------------------
10970 -- pragma Share_Generic (NAME {, NAME});
10972 when Pragma_Share_Generic =>
10974 Process_Generic_List;
10980 -- pragma Shared (LOCAL_NAME);
10982 when Pragma_Shared =>
10984 Process_Atomic_Shared_Volatile;
10986 --------------------
10987 -- Shared_Passive --
10988 --------------------
10990 -- pragma Shared_Passive [(library_unit_NAME)];
10992 -- Set the flag Is_Shared_Passive of program unit name entity
10994 when Pragma_Shared_Passive => Shared_Passive : declare
10995 Cunit_Node : Node_Id;
10996 Cunit_Ent : Entity_Id;
10999 Check_Ada_83_Warning;
11000 Check_Valid_Library_Unit_Pragma;
11002 if Nkind (N) = N_Null_Statement then
11006 Cunit_Node := Cunit (Current_Sem_Unit);
11007 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
11009 if not Nkind_In (Unit (Cunit_Node), N_Package_Declaration,
11010 N_Generic_Package_Declaration)
11013 ("pragma% can only apply to a package declaration");
11016 Set_Is_Shared_Passive (Cunit_Ent);
11017 end Shared_Passive;
11019 ----------------------
11020 -- Source_File_Name --
11021 ----------------------
11023 -- There are five forms for this pragma:
11025 -- pragma Source_File_Name (
11026 -- [UNIT_NAME =>] unit_NAME,
11027 -- BODY_FILE_NAME => STRING_LITERAL
11028 -- [, [INDEX =>] INTEGER_LITERAL]);
11030 -- pragma Source_File_Name (
11031 -- [UNIT_NAME =>] unit_NAME,
11032 -- SPEC_FILE_NAME => STRING_LITERAL
11033 -- [, [INDEX =>] INTEGER_LITERAL]);
11035 -- pragma Source_File_Name (
11036 -- BODY_FILE_NAME => STRING_LITERAL
11037 -- [, DOT_REPLACEMENT => STRING_LITERAL]
11038 -- [, CASING => CASING_SPEC]);
11040 -- pragma Source_File_Name (
11041 -- SPEC_FILE_NAME => STRING_LITERAL
11042 -- [, DOT_REPLACEMENT => STRING_LITERAL]
11043 -- [, CASING => CASING_SPEC]);
11045 -- pragma Source_File_Name (
11046 -- SUBUNIT_FILE_NAME => STRING_LITERAL
11047 -- [, DOT_REPLACEMENT => STRING_LITERAL]
11048 -- [, CASING => CASING_SPEC]);
11050 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
11052 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
11053 -- Source_File_Name (SFN), however their usage is exclusive: SFN can
11054 -- only be used when no project file is used, while SFNP can only be
11055 -- used when a project file is used.
11057 -- No processing here. Processing was completed during parsing, since
11058 -- we need to have file names set as early as possible. Units are
11059 -- loaded well before semantic processing starts.
11061 -- The only processing we defer to this point is the check for
11062 -- correct placement.
11064 when Pragma_Source_File_Name =>
11066 Check_Valid_Configuration_Pragma;
11068 ------------------------------
11069 -- Source_File_Name_Project --
11070 ------------------------------
11072 -- See Source_File_Name for syntax
11074 -- No processing here. Processing was completed during parsing, since
11075 -- we need to have file names set as early as possible. Units are
11076 -- loaded well before semantic processing starts.
11078 -- The only processing we defer to this point is the check for
11079 -- correct placement.
11081 when Pragma_Source_File_Name_Project =>
11083 Check_Valid_Configuration_Pragma;
11085 -- Check that a pragma Source_File_Name_Project is used only in a
11086 -- configuration pragmas file.
11088 -- Pragmas Source_File_Name_Project should only be generated by
11089 -- the Project Manager in configuration pragmas files.
11091 -- This is really an ugly test. It seems to depend on some
11092 -- accidental and undocumented property. At the very least it
11093 -- needs to be documented, but it would be better to have a
11094 -- clean way of testing if we are in a configuration file???
11096 if Present (Parent (N)) then
11098 ("pragma% can only appear in a configuration pragmas file");
11101 ----------------------
11102 -- Source_Reference --
11103 ----------------------
11105 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
11107 -- Nothing to do, all processing completed in Par.Prag, since we need
11108 -- the information for possible parser messages that are output.
11110 when Pragma_Source_Reference =>
11113 --------------------------------
11114 -- Static_Elaboration_Desired --
11115 --------------------------------
11117 -- pragma Static_Elaboration_Desired (DIRECT_NAME);
11119 when Pragma_Static_Elaboration_Desired =>
11121 Check_At_Most_N_Arguments (1);
11123 if Is_Compilation_Unit (Current_Scope)
11124 and then Ekind (Current_Scope) = E_Package
11126 Set_Static_Elaboration_Desired (Current_Scope, True);
11128 Error_Pragma ("pragma% must apply to a library-level package");
11135 -- pragma Storage_Size (EXPRESSION);
11137 when Pragma_Storage_Size => Storage_Size : declare
11138 P : constant Node_Id := Parent (N);
11142 Check_No_Identifiers;
11143 Check_Arg_Count (1);
11145 -- The expression must be analyzed in the special manner described
11146 -- in "Handling of Default Expressions" in sem.ads.
11148 Arg := Expression (Arg1);
11149 Preanalyze_Spec_Expression (Arg, Any_Integer);
11151 if not Is_Static_Expression (Arg) then
11152 Check_Restriction (Static_Storage_Size, Arg);
11155 if Nkind (P) /= N_Task_Definition then
11160 if Has_Storage_Size_Pragma (P) then
11161 Error_Pragma ("duplicate pragma% not allowed");
11163 Set_Has_Storage_Size_Pragma (P, True);
11166 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
11167 -- ??? exp_ch9 should use this!
11175 -- pragma Storage_Unit (NUMERIC_LITERAL);
11177 -- Only permitted argument is System'Storage_Unit value
11179 when Pragma_Storage_Unit =>
11180 Check_No_Identifiers;
11181 Check_Arg_Count (1);
11182 Check_Arg_Is_Integer_Literal (Arg1);
11184 if Intval (Expression (Arg1)) /=
11185 UI_From_Int (Ttypes.System_Storage_Unit)
11187 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
11189 ("the only allowed argument for pragma% is ^", Arg1);
11192 --------------------
11193 -- Stream_Convert --
11194 --------------------
11196 -- pragma Stream_Convert (
11197 -- [Entity =>] type_LOCAL_NAME,
11198 -- [Read =>] function_NAME,
11199 -- [Write =>] function NAME);
11201 when Pragma_Stream_Convert => Stream_Convert : declare
11203 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
11204 -- Check that the given argument is the name of a local function
11205 -- of one argument that is not overloaded earlier in the current
11206 -- local scope. A check is also made that the argument is a
11207 -- function with one parameter.
11209 --------------------------------------
11210 -- Check_OK_Stream_Convert_Function --
11211 --------------------------------------
11213 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
11217 Check_Arg_Is_Local_Name (Arg);
11218 Ent := Entity (Expression (Arg));
11220 if Has_Homonym (Ent) then
11222 ("argument for pragma% may not be overloaded", Arg);
11225 if Ekind (Ent) /= E_Function
11226 or else No (First_Formal (Ent))
11227 or else Present (Next_Formal (First_Formal (Ent)))
11230 ("argument for pragma% must be" &
11231 " function of one argument", Arg);
11233 end Check_OK_Stream_Convert_Function;
11235 -- Start of processing for Stream_Convert
11239 Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
11240 Check_Arg_Count (3);
11241 Check_Optional_Identifier (Arg1, Name_Entity);
11242 Check_Optional_Identifier (Arg2, Name_Read);
11243 Check_Optional_Identifier (Arg3, Name_Write);
11244 Check_Arg_Is_Local_Name (Arg1);
11245 Check_OK_Stream_Convert_Function (Arg2);
11246 Check_OK_Stream_Convert_Function (Arg3);
11249 Typ : constant Entity_Id :=
11250 Underlying_Type (Entity (Expression (Arg1)));
11251 Read : constant Entity_Id := Entity (Expression (Arg2));
11252 Write : constant Entity_Id := Entity (Expression (Arg3));
11255 Check_First_Subtype (Arg1);
11257 -- Check for too early or too late. Note that we don't enforce
11258 -- the rule about primitive operations in this case, since, as
11259 -- is the case for explicit stream attributes themselves, these
11260 -- restrictions are not appropriate. Note that the chaining of
11261 -- the pragma by Rep_Item_Too_Late is actually the critical
11262 -- processing done for this pragma.
11264 if Rep_Item_Too_Early (Typ, N)
11266 Rep_Item_Too_Late (Typ, N, FOnly => True)
11271 -- Return if previous error
11273 if Etype (Typ) = Any_Type
11275 Etype (Read) = Any_Type
11277 Etype (Write) = Any_Type
11284 if Underlying_Type (Etype (Read)) /= Typ then
11286 ("incorrect return type for function&", Arg2);
11289 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
11291 ("incorrect parameter type for function&", Arg3);
11294 if Underlying_Type (Etype (First_Formal (Read))) /=
11295 Underlying_Type (Etype (Write))
11298 ("result type of & does not match Read parameter type",
11302 end Stream_Convert;
11304 -------------------------
11305 -- Style_Checks (GNAT) --
11306 -------------------------
11308 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
11310 -- This is processed by the parser since some of the style checks
11311 -- take place during source scanning and parsing. This means that
11312 -- we don't need to issue error messages here.
11314 when Pragma_Style_Checks => Style_Checks : declare
11315 A : constant Node_Id := Expression (Arg1);
11321 Check_No_Identifiers;
11323 -- Two argument form
11325 if Arg_Count = 2 then
11326 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
11333 E_Id := Expression (Arg2);
11336 if not Is_Entity_Name (E_Id) then
11338 ("second argument of pragma% must be entity name",
11342 E := Entity (E_Id);
11348 Set_Suppress_Style_Checks (E,
11349 (Chars (Expression (Arg1)) = Name_Off));
11350 exit when No (Homonym (E));
11356 -- One argument form
11359 Check_Arg_Count (1);
11361 if Nkind (A) = N_String_Literal then
11365 Slen : constant Natural := Natural (String_Length (S));
11366 Options : String (1 .. Slen);
11372 C := Get_String_Char (S, Int (J));
11373 exit when not In_Character_Range (C);
11374 Options (J) := Get_Character (C);
11376 -- If at end of string, set options. As per discussion
11377 -- above, no need to check for errors, since we issued
11378 -- them in the parser.
11381 Set_Style_Check_Options (Options);
11389 elsif Nkind (A) = N_Identifier then
11390 if Chars (A) = Name_All_Checks then
11392 Set_GNAT_Style_Check_Options;
11394 Set_Default_Style_Check_Options;
11397 elsif Chars (A) = Name_On then
11398 Style_Check := True;
11400 elsif Chars (A) = Name_Off then
11401 Style_Check := False;
11411 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
11413 when Pragma_Subtitle =>
11415 Check_Arg_Count (1);
11416 Check_Optional_Identifier (Arg1, Name_Subtitle);
11417 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
11424 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
11426 when Pragma_Suppress =>
11427 Process_Suppress_Unsuppress (True);
11433 -- pragma Suppress_All;
11435 -- The only check made here is that the pragma appears in the proper
11436 -- place, i.e. following a compilation unit. If indeed it appears in
11437 -- this context, then the parser has already inserted an equivalent
11438 -- pragma Suppress (All_Checks) to get the required effect.
11440 when Pragma_Suppress_All =>
11442 Check_Arg_Count (0);
11444 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
11445 or else not Is_List_Member (N)
11446 or else List_Containing (N) /= Pragmas_After (Parent (N))
11449 ("misplaced pragma%, must follow compilation unit");
11452 -------------------------
11453 -- Suppress_Debug_Info --
11454 -------------------------
11456 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
11458 when Pragma_Suppress_Debug_Info =>
11460 Check_Arg_Count (1);
11461 Check_Optional_Identifier (Arg1, Name_Entity);
11462 Check_Arg_Is_Local_Name (Arg1);
11463 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
11465 ----------------------------------
11466 -- Suppress_Exception_Locations --
11467 ----------------------------------
11469 -- pragma Suppress_Exception_Locations;
11471 when Pragma_Suppress_Exception_Locations =>
11473 Check_Arg_Count (0);
11474 Check_Valid_Configuration_Pragma;
11475 Exception_Locations_Suppressed := True;
11477 -----------------------------
11478 -- Suppress_Initialization --
11479 -----------------------------
11481 -- pragma Suppress_Initialization ([Entity =>] type_Name);
11483 when Pragma_Suppress_Initialization => Suppress_Init : declare
11489 Check_Arg_Count (1);
11490 Check_Optional_Identifier (Arg1, Name_Entity);
11491 Check_Arg_Is_Local_Name (Arg1);
11493 E_Id := Expression (Arg1);
11495 if Etype (E_Id) = Any_Type then
11499 E := Entity (E_Id);
11501 if Is_Type (E) then
11502 if Is_Incomplete_Or_Private_Type (E) then
11503 if No (Full_View (Base_Type (E))) then
11505 ("argument of pragma% cannot be an incomplete type",
11508 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
11511 Set_Suppress_Init_Proc (Base_Type (E));
11516 ("pragma% requires argument that is a type name", Arg1);
11524 -- pragma System_Name (DIRECT_NAME);
11526 -- Syntax check: one argument, which must be the identifier GNAT or
11527 -- the identifier GCC, no other identifiers are acceptable.
11529 when Pragma_System_Name =>
11531 Check_No_Identifiers;
11532 Check_Arg_Count (1);
11533 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
11535 -----------------------------
11536 -- Task_Dispatching_Policy --
11537 -----------------------------
11539 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
11541 when Pragma_Task_Dispatching_Policy => declare
11545 Check_Ada_83_Warning;
11546 Check_Arg_Count (1);
11547 Check_No_Identifiers;
11548 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
11549 Check_Valid_Configuration_Pragma;
11550 Get_Name_String (Chars (Expression (Arg1)));
11551 DP := Fold_Upper (Name_Buffer (1));
11553 if Task_Dispatching_Policy /= ' '
11554 and then Task_Dispatching_Policy /= DP
11556 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
11558 ("task dispatching policy incompatible with policy#");
11560 -- Set new policy, but always preserve System_Location since we
11561 -- like the error message with the run time name.
11564 Task_Dispatching_Policy := DP;
11566 if Task_Dispatching_Policy_Sloc /= System_Location then
11567 Task_Dispatching_Policy_Sloc := Loc;
11576 -- pragma Task_Info (EXPRESSION);
11578 when Pragma_Task_Info => Task_Info : declare
11579 P : constant Node_Id := Parent (N);
11584 if Nkind (P) /= N_Task_Definition then
11585 Error_Pragma ("pragma% must appear in task definition");
11588 Check_No_Identifiers;
11589 Check_Arg_Count (1);
11591 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
11593 if Etype (Expression (Arg1)) = Any_Type then
11597 if Has_Task_Info_Pragma (P) then
11598 Error_Pragma ("duplicate pragma% not allowed");
11600 Set_Has_Task_Info_Pragma (P, True);
11608 -- pragma Task_Name (string_EXPRESSION);
11610 when Pragma_Task_Name => Task_Name : declare
11611 P : constant Node_Id := Parent (N);
11615 Check_No_Identifiers;
11616 Check_Arg_Count (1);
11618 Arg := Expression (Arg1);
11620 -- The expression is used in the call to Create_Task, and must be
11621 -- expanded there, not in the context of the current spec. It must
11622 -- however be analyzed to capture global references, in case it
11623 -- appears in a generic context.
11625 Preanalyze_And_Resolve (Arg, Standard_String);
11627 if Nkind (P) /= N_Task_Definition then
11631 if Has_Task_Name_Pragma (P) then
11632 Error_Pragma ("duplicate pragma% not allowed");
11634 Set_Has_Task_Name_Pragma (P, True);
11635 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
11643 -- pragma Task_Storage (
11644 -- [Task_Type =>] LOCAL_NAME,
11645 -- [Top_Guard =>] static_integer_EXPRESSION);
11647 when Pragma_Task_Storage => Task_Storage : declare
11648 Args : Args_List (1 .. 2);
11649 Names : constant Name_List (1 .. 2) := (
11653 Task_Type : Node_Id renames Args (1);
11654 Top_Guard : Node_Id renames Args (2);
11660 Gather_Associations (Names, Args);
11662 if No (Task_Type) then
11664 ("missing task_type argument for pragma%");
11667 Check_Arg_Is_Local_Name (Task_Type);
11669 Ent := Entity (Task_Type);
11671 if not Is_Task_Type (Ent) then
11673 ("argument for pragma% must be task type", Task_Type);
11676 if No (Top_Guard) then
11678 ("pragma% takes two arguments", Task_Type);
11680 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
11683 Check_First_Subtype (Task_Type);
11685 if Rep_Item_Too_Late (Ent, N) then
11690 --------------------------
11691 -- Thread_Local_Storage --
11692 --------------------------
11694 -- pragma Thread_Local_Storage ([Entity =>] LOCAL_NAME);
11696 when Pragma_Thread_Local_Storage => Thread_Local_Storage : declare
11702 Check_Arg_Count (1);
11703 Check_Optional_Identifier (Arg1, Name_Entity);
11704 Check_Arg_Is_Library_Level_Local_Name (Arg1);
11706 Id := Expression (Arg1);
11709 if not Is_Entity_Name (Id)
11710 or else Ekind (Entity (Id)) /= E_Variable
11712 Error_Pragma_Arg ("local variable name required", Arg1);
11717 if Rep_Item_Too_Early (E, N)
11718 or else Rep_Item_Too_Late (E, N)
11723 Set_Has_Pragma_Thread_Local_Storage (E);
11724 Set_Has_Gigi_Rep_Item (E);
11725 end Thread_Local_Storage;
11731 -- pragma Time_Slice (static_duration_EXPRESSION);
11733 when Pragma_Time_Slice => Time_Slice : declare
11739 Check_Arg_Count (1);
11740 Check_No_Identifiers;
11741 Check_In_Main_Program;
11742 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
11744 if not Error_Posted (Arg1) then
11746 while Present (Nod) loop
11747 if Nkind (Nod) = N_Pragma
11748 and then Pragma_Name (Nod) = Name_Time_Slice
11750 Error_Msg_Name_1 := Pname;
11751 Error_Msg_N ("duplicate pragma% not permitted", Nod);
11758 -- Process only if in main unit
11760 if Get_Source_Unit (Loc) = Main_Unit then
11761 Opt.Time_Slice_Set := True;
11762 Val := Expr_Value_R (Expression (Arg1));
11764 if Val <= Ureal_0 then
11765 Opt.Time_Slice_Value := 0;
11767 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
11768 Opt.Time_Slice_Value := 1_000_000_000;
11771 Opt.Time_Slice_Value :=
11772 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
11781 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
11783 -- TITLING_OPTION ::=
11784 -- [Title =>] STRING_LITERAL
11785 -- | [Subtitle =>] STRING_LITERAL
11787 when Pragma_Title => Title : declare
11788 Args : Args_List (1 .. 2);
11789 Names : constant Name_List (1 .. 2) := (
11795 Gather_Associations (Names, Args);
11798 for J in 1 .. 2 loop
11799 if Present (Args (J)) then
11800 Check_Arg_Is_Static_Expression (Args (J), Standard_String);
11805 ---------------------
11806 -- Unchecked_Union --
11807 ---------------------
11809 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
11811 when Pragma_Unchecked_Union => Unchecked_Union : declare
11812 Assoc : constant Node_Id := Arg1;
11813 Type_Id : constant Node_Id := Expression (Assoc);
11824 Check_No_Identifiers;
11825 Check_Arg_Count (1);
11826 Check_Arg_Is_Local_Name (Arg1);
11828 Find_Type (Type_Id);
11829 Typ := Entity (Type_Id);
11832 or else Rep_Item_Too_Early (Typ, N)
11836 Typ := Underlying_Type (Typ);
11839 if Rep_Item_Too_Late (Typ, N) then
11843 Check_First_Subtype (Arg1);
11845 -- Note remaining cases are references to a type in the current
11846 -- declarative part. If we find an error, we post the error on
11847 -- the relevant type declaration at an appropriate point.
11849 if not Is_Record_Type (Typ) then
11850 Error_Msg_N ("Unchecked_Union must be record type", Typ);
11853 elsif Is_Tagged_Type (Typ) then
11854 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
11857 elsif Is_Limited_Type (Typ) then
11859 ("Unchecked_Union must not be limited record type", Typ);
11860 Explain_Limited_Type (Typ, Typ);
11864 if not Has_Discriminants (Typ) then
11866 ("Unchecked_Union must have one discriminant", Typ);
11870 Discr := First_Discriminant (Typ);
11871 while Present (Discr) loop
11872 if No (Discriminant_Default_Value (Discr)) then
11874 ("Unchecked_Union discriminant must have default value",
11877 Next_Discriminant (Discr);
11880 Tdef := Type_Definition (Declaration_Node (Typ));
11881 Clist := Component_List (Tdef);
11883 Comp := First (Component_Items (Clist));
11884 while Present (Comp) loop
11885 Check_Component (Comp);
11889 if No (Clist) or else No (Variant_Part (Clist)) then
11891 ("Unchecked_Union must have variant part",
11896 Vpart := Variant_Part (Clist);
11898 Variant := First (Variants (Vpart));
11899 while Present (Variant) loop
11900 Check_Variant (Variant);
11905 Set_Is_Unchecked_Union (Typ, True);
11906 Set_Convention (Typ, Convention_C);
11908 Set_Has_Unchecked_Union (Base_Type (Typ), True);
11909 Set_Is_Unchecked_Union (Base_Type (Typ), True);
11910 end Unchecked_Union;
11912 ------------------------
11913 -- Unimplemented_Unit --
11914 ------------------------
11916 -- pragma Unimplemented_Unit;
11918 -- Note: this only gives an error if we are generating code, or if
11919 -- we are in a generic library unit (where the pragma appears in the
11920 -- body, not in the spec).
11922 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
11923 Cunitent : constant Entity_Id :=
11924 Cunit_Entity (Get_Source_Unit (Loc));
11925 Ent_Kind : constant Entity_Kind :=
11930 Check_Arg_Count (0);
11932 if Operating_Mode = Generate_Code
11933 or else Ent_Kind = E_Generic_Function
11934 or else Ent_Kind = E_Generic_Procedure
11935 or else Ent_Kind = E_Generic_Package
11937 Get_Name_String (Chars (Cunitent));
11938 Set_Casing (Mixed_Case);
11939 Write_Str (Name_Buffer (1 .. Name_Len));
11940 Write_Str (" is not supported in this configuration");
11942 raise Unrecoverable_Error;
11944 end Unimplemented_Unit;
11946 ------------------------
11947 -- Universal_Aliasing --
11948 ------------------------
11950 -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)];
11952 when Pragma_Universal_Aliasing => Universal_Alias : declare
11957 Check_Arg_Count (1);
11958 Check_Optional_Identifier (Arg2, Name_Entity);
11959 Check_Arg_Is_Local_Name (Arg1);
11960 E_Id := Entity (Expression (Arg1));
11962 if E_Id = Any_Type then
11964 elsif No (E_Id) or else not Is_Type (E_Id) then
11965 Error_Pragma_Arg ("pragma% requires type", Arg1);
11968 Set_Universal_Aliasing (Implementation_Base_Type (E_Id));
11969 end Universal_Alias;
11971 --------------------
11972 -- Universal_Data --
11973 --------------------
11975 -- pragma Universal_Data [(library_unit_NAME)];
11977 when Pragma_Universal_Data =>
11980 -- If this is a configuration pragma, then set the universal
11981 -- addressing option, otherwise confirm that the pragma satisfies
11982 -- the requirements of library unit pragma placement and leave it
11983 -- to the GNAAMP back end to detect the pragma (avoids transitive
11984 -- setting of the option due to withed units).
11986 if Is_Configuration_Pragma then
11987 Universal_Addressing_On_AAMP := True;
11989 Check_Valid_Library_Unit_Pragma;
11992 if not AAMP_On_Target then
11993 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
12000 -- pragma Unmodified (local_Name {, local_Name});
12002 when Pragma_Unmodified => Unmodified : declare
12003 Arg_Node : Node_Id;
12004 Arg_Expr : Node_Id;
12005 Arg_Ent : Entity_Id;
12009 Check_At_Least_N_Arguments (1);
12011 -- Loop through arguments
12014 while Present (Arg_Node) loop
12015 Check_No_Identifier (Arg_Node);
12017 -- Note: the analyze call done by Check_Arg_Is_Local_Name will
12018 -- in fact generate reference, so that the entity will have a
12019 -- reference, which will inhibit any warnings about it not
12020 -- being referenced, and also properly show up in the ali file
12021 -- as a reference. But this reference is recorded before the
12022 -- Has_Pragma_Unreferenced flag is set, so that no warning is
12023 -- generated for this reference.
12025 Check_Arg_Is_Local_Name (Arg_Node);
12026 Arg_Expr := Get_Pragma_Arg (Arg_Node);
12028 if Is_Entity_Name (Arg_Expr) then
12029 Arg_Ent := Entity (Arg_Expr);
12031 if not Is_Assignable (Arg_Ent) then
12033 ("pragma% can only be applied to a variable",
12036 Set_Has_Pragma_Unmodified (Arg_Ent);
12048 -- pragma Unreferenced (local_Name {, local_Name});
12050 -- or when used in a context clause:
12052 -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
12054 when Pragma_Unreferenced => Unreferenced : declare
12055 Arg_Node : Node_Id;
12056 Arg_Expr : Node_Id;
12057 Arg_Ent : Entity_Id;
12062 Check_At_Least_N_Arguments (1);
12064 -- Check case of appearing within context clause
12066 if Is_In_Context_Clause then
12068 -- The arguments must all be units mentioned in a with clause
12069 -- in the same context clause. Note we already checked (in
12070 -- Par.Prag) that the arguments are either identifiers or
12071 -- selected components.
12074 while Present (Arg_Node) loop
12075 Citem := First (List_Containing (N));
12076 while Citem /= N loop
12077 if Nkind (Citem) = N_With_Clause
12078 and then Same_Name (Name (Citem), Expression (Arg_Node))
12080 Set_Has_Pragma_Unreferenced
12083 (Library_Unit (Citem))));
12084 Set_Unit_Name (Expression (Arg_Node), Name (Citem));
12093 ("argument of pragma% is not with'ed unit", Arg_Node);
12099 -- Case of not in list of context items
12103 while Present (Arg_Node) loop
12104 Check_No_Identifier (Arg_Node);
12106 -- Note: the analyze call done by Check_Arg_Is_Local_Name
12107 -- will in fact generate reference, so that the entity will
12108 -- have a reference, which will inhibit any warnings about
12109 -- it not being referenced, and also properly show up in the
12110 -- ali file as a reference. But this reference is recorded
12111 -- before the Has_Pragma_Unreferenced flag is set, so that
12112 -- no warning is generated for this reference.
12114 Check_Arg_Is_Local_Name (Arg_Node);
12115 Arg_Expr := Get_Pragma_Arg (Arg_Node);
12117 if Is_Entity_Name (Arg_Expr) then
12118 Arg_Ent := Entity (Arg_Expr);
12120 -- If the entity is overloaded, the pragma applies to the
12121 -- most recent overloading, as documented. In this case,
12122 -- name resolution does not generate a reference, so it
12123 -- must be done here explicitly.
12125 if Is_Overloaded (Arg_Expr) then
12126 Generate_Reference (Arg_Ent, N);
12129 Set_Has_Pragma_Unreferenced (Arg_Ent);
12137 --------------------------
12138 -- Unreferenced_Objects --
12139 --------------------------
12141 -- pragma Unreferenced_Objects (local_Name {, local_Name});
12143 when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare
12144 Arg_Node : Node_Id;
12145 Arg_Expr : Node_Id;
12149 Check_At_Least_N_Arguments (1);
12152 while Present (Arg_Node) loop
12153 Check_No_Identifier (Arg_Node);
12154 Check_Arg_Is_Local_Name (Arg_Node);
12155 Arg_Expr := Get_Pragma_Arg (Arg_Node);
12157 if not Is_Entity_Name (Arg_Expr)
12158 or else not Is_Type (Entity (Arg_Expr))
12161 ("argument for pragma% must be type or subtype", Arg_Node);
12164 Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr));
12167 end Unreferenced_Objects;
12169 ------------------------------
12170 -- Unreserve_All_Interrupts --
12171 ------------------------------
12173 -- pragma Unreserve_All_Interrupts;
12175 when Pragma_Unreserve_All_Interrupts =>
12177 Check_Arg_Count (0);
12179 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
12180 Unreserve_All_Interrupts := True;
12187 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
12189 when Pragma_Unsuppress =>
12191 Process_Suppress_Unsuppress (False);
12193 -------------------
12194 -- Use_VADS_Size --
12195 -------------------
12197 -- pragma Use_VADS_Size;
12199 when Pragma_Use_VADS_Size =>
12201 Check_Arg_Count (0);
12202 Check_Valid_Configuration_Pragma;
12203 Use_VADS_Size := True;
12205 ---------------------
12206 -- Validity_Checks --
12207 ---------------------
12209 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
12211 when Pragma_Validity_Checks => Validity_Checks : declare
12212 A : constant Node_Id := Expression (Arg1);
12218 Check_Arg_Count (1);
12219 Check_No_Identifiers;
12221 if Nkind (A) = N_String_Literal then
12225 Slen : constant Natural := Natural (String_Length (S));
12226 Options : String (1 .. Slen);
12232 C := Get_String_Char (S, Int (J));
12233 exit when not In_Character_Range (C);
12234 Options (J) := Get_Character (C);
12237 Set_Validity_Check_Options (Options);
12245 elsif Nkind (A) = N_Identifier then
12247 if Chars (A) = Name_All_Checks then
12248 Set_Validity_Check_Options ("a");
12250 elsif Chars (A) = Name_On then
12251 Validity_Checks_On := True;
12253 elsif Chars (A) = Name_Off then
12254 Validity_Checks_On := False;
12258 end Validity_Checks;
12264 -- pragma Volatile (LOCAL_NAME);
12266 when Pragma_Volatile =>
12267 Process_Atomic_Shared_Volatile;
12269 -------------------------
12270 -- Volatile_Components --
12271 -------------------------
12273 -- pragma Volatile_Components (array_LOCAL_NAME);
12275 -- Volatile is handled by the same circuit as Atomic_Components
12281 -- pragma Warnings (On | Off);
12282 -- pragma Warnings (On | Off, LOCAL_NAME);
12283 -- pragma Warnings (static_string_EXPRESSION);
12284 -- pragma Warnings (On | Off, STRING_LITERAL);
12286 when Pragma_Warnings => Warnings : begin
12288 Check_At_Least_N_Arguments (1);
12289 Check_No_Identifiers;
12291 -- If debug flag -gnatd.i is set, pragma is ignored
12293 if Debug_Flag_Dot_I then
12297 -- Process various forms of the pragma
12300 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
12303 -- One argument case
12305 if Arg_Count = 1 then
12307 -- On/Off one argument case was processed by parser
12309 if Nkind (Argx) = N_Identifier
12311 (Chars (Argx) = Name_On
12313 Chars (Argx) = Name_Off)
12317 -- One argument case must be ON/OFF or static string expr
12319 elsif not Is_Static_String_Expression (Arg1) then
12321 ("argument of pragma% must be On/Off or " &
12322 "static string expression", Arg1);
12324 -- One argument string expression case
12328 Lit : constant Node_Id := Expr_Value_S (Argx);
12329 Str : constant String_Id := Strval (Lit);
12330 Len : constant Nat := String_Length (Str);
12338 while J <= Len loop
12339 C := Get_String_Char (Str, J);
12340 OK := In_Character_Range (C);
12343 Chr := Get_Character (C);
12347 if J < Len and then Chr = '.' then
12349 C := Get_String_Char (Str, J);
12350 Chr := Get_Character (C);
12352 if not Set_Dot_Warning_Switch (Chr) then
12354 ("invalid warning switch character " &
12361 OK := Set_Warning_Switch (Chr);
12367 ("invalid warning switch character " & Chr,
12376 -- Two or more arguments (must be two)
12379 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
12380 Check_At_Most_N_Arguments (2);
12388 E_Id := Expression (Arg2);
12391 -- In the expansion of an inlined body, a reference to
12392 -- the formal may be wrapped in a conversion if the
12393 -- actual is a conversion. Retrieve the real entity name.
12395 if (In_Instance_Body
12396 or else In_Inlined_Body)
12397 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
12399 E_Id := Expression (E_Id);
12402 -- Entity name case
12404 if Is_Entity_Name (E_Id) then
12405 E := Entity (E_Id);
12412 (E, (Chars (Expression (Arg1)) = Name_Off));
12414 if Chars (Expression (Arg1)) = Name_Off
12415 and then Warn_On_Warnings_Off
12417 Warnings_Off_Pragmas.Append ((N, E));
12420 if Is_Enumeration_Type (E) then
12424 Lit := First_Literal (E);
12425 while Present (Lit) loop
12426 Set_Warnings_Off (Lit);
12427 Next_Literal (Lit);
12432 exit when No (Homonym (E));
12437 -- Error if not entity or static string literal case
12439 elsif not Is_Static_String_Expression (Arg2) then
12441 ("second argument of pragma% must be entity " &
12442 "name or static string expression", Arg2);
12444 -- String literal case
12447 String_To_Name_Buffer
12448 (Strval (Expr_Value_S (Expression (Arg2))));
12450 -- Note on configuration pragma case: If this is a
12451 -- configuration pragma, then for an OFF pragma, we
12452 -- just set Config True in the call, which is all
12453 -- that needs to be done. For the case of ON, this
12454 -- is normally an error, unless it is canceling the
12455 -- effect of a previous OFF pragma in the same file.
12456 -- In any other case, an error will be signalled (ON
12457 -- with no matching OFF).
12459 if Chars (Argx) = Name_Off then
12460 Set_Specific_Warning_Off
12461 (Loc, Name_Buffer (1 .. Name_Len),
12462 Config => Is_Configuration_Pragma);
12464 elsif Chars (Argx) = Name_On then
12465 Set_Specific_Warning_On
12466 (Loc, Name_Buffer (1 .. Name_Len), Err);
12470 ("?pragma Warnings On with no " &
12471 "matching Warnings Off",
12481 -------------------
12482 -- Weak_External --
12483 -------------------
12485 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
12487 when Pragma_Weak_External => Weak_External : declare
12492 Check_Arg_Count (1);
12493 Check_Optional_Identifier (Arg1, Name_Entity);
12494 Check_Arg_Is_Library_Level_Local_Name (Arg1);
12495 Ent := Entity (Expression (Arg1));
12497 if Rep_Item_Too_Early (Ent, N) then
12500 Ent := Underlying_Type (Ent);
12503 -- The only processing required is to link this item on to the
12504 -- list of rep items for the given entity. This is accomplished
12505 -- by the call to Rep_Item_Too_Late (when no error is detected
12506 -- and False is returned).
12508 if Rep_Item_Too_Late (Ent, N) then
12511 Set_Has_Gigi_Rep_Item (Ent);
12515 -----------------------------
12516 -- Wide_Character_Encoding --
12517 -----------------------------
12519 -- pragma Wide_Character_Encoding (IDENTIFIER);
12521 when Pragma_Wide_Character_Encoding =>
12524 -- Nothing to do, handled in parser. Note that we do not enforce
12525 -- configuration pragma placement, this pragma can appear at any
12526 -- place in the source, allowing mixed encodings within a single
12531 --------------------
12532 -- Unknown_Pragma --
12533 --------------------
12535 -- Should be impossible, since the case of an unknown pragma is
12536 -- separately processed before the case statement is entered.
12538 when Unknown_Pragma =>
12539 raise Program_Error;
12542 -- AI05-0144: detect dangerous order dependence. Disabled for now,
12543 -- until AI is formally approved.
12545 -- Check_Order_Dependence;
12548 when Pragma_Exit => null;
12549 end Analyze_Pragma;
12551 -------------------
12552 -- Check_Enabled --
12553 -------------------
12555 function Check_Enabled (Nam : Name_Id) return Boolean is
12559 PP := Opt.Check_Policy_List;
12562 return Assertions_Enabled;
12565 Nam = Chars (Expression (First (Pragma_Argument_Associations (PP))))
12568 Chars (Expression (Last (Pragma_Argument_Associations (PP))))
12570 when Name_On | Name_Check =>
12572 when Name_Off | Name_Ignore =>
12575 raise Program_Error;
12579 PP := Next_Pragma (PP);
12584 ---------------------------------
12585 -- Delay_Config_Pragma_Analyze --
12586 ---------------------------------
12588 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
12590 return Pragma_Name (N) = Name_Interrupt_State
12592 Pragma_Name (N) = Name_Priority_Specific_Dispatching;
12593 end Delay_Config_Pragma_Analyze;
12595 -------------------------
12596 -- Get_Base_Subprogram --
12597 -------------------------
12599 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
12600 Result : Entity_Id;
12603 -- Follow subprogram renaming chain
12606 while Is_Subprogram (Result)
12608 (Is_Generic_Instance (Result)
12609 or else Nkind (Parent (Declaration_Node (Result))) =
12610 N_Subprogram_Renaming_Declaration)
12611 and then Present (Alias (Result))
12613 Result := Alias (Result);
12617 end Get_Base_Subprogram;
12619 --------------------
12620 -- Get_Pragma_Arg --
12621 --------------------
12623 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
12625 if Nkind (Arg) = N_Pragma_Argument_Association then
12626 return Expression (Arg);
12630 end Get_Pragma_Arg;
12636 procedure Initialize is
12641 -----------------------------
12642 -- Is_Config_Static_String --
12643 -----------------------------
12645 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
12647 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
12648 -- This is an internal recursive function that is just like the outer
12649 -- function except that it adds the string to the name buffer rather
12650 -- than placing the string in the name buffer.
12652 ------------------------------
12653 -- Add_Config_Static_String --
12654 ------------------------------
12656 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
12663 if Nkind (N) = N_Op_Concat then
12664 if Add_Config_Static_String (Left_Opnd (N)) then
12665 N := Right_Opnd (N);
12671 if Nkind (N) /= N_String_Literal then
12672 Error_Msg_N ("string literal expected for pragma argument", N);
12676 for J in 1 .. String_Length (Strval (N)) loop
12677 C := Get_String_Char (Strval (N), J);
12679 if not In_Character_Range (C) then
12681 ("string literal contains invalid wide character",
12682 Sloc (N) + 1 + Source_Ptr (J));
12686 Add_Char_To_Name_Buffer (Get_Character (C));
12691 end Add_Config_Static_String;
12693 -- Start of processing for Is_Config_Static_String
12698 return Add_Config_Static_String (Arg);
12699 end Is_Config_Static_String;
12701 -----------------------------------------
12702 -- Is_Non_Significant_Pragma_Reference --
12703 -----------------------------------------
12705 -- This function makes use of the following static table which indicates
12706 -- whether a given pragma is significant.
12708 -- -1 indicates that references in any argument position are significant
12709 -- 0 indicates that appearence in any argument is not significant
12710 -- +n indicates that appearence as argument n is significant, but all
12711 -- other arguments are not significant
12712 -- 99 special processing required (e.g. for pragma Check)
12714 Sig_Flags : constant array (Pragma_Id) of Int :=
12715 (Pragma_AST_Entry => -1,
12716 Pragma_Abort_Defer => -1,
12717 Pragma_Ada_83 => -1,
12718 Pragma_Ada_95 => -1,
12719 Pragma_Ada_05 => -1,
12720 Pragma_Ada_2005 => -1,
12721 Pragma_Ada_12 => -1,
12722 Pragma_Ada_2012 => -1,
12723 Pragma_All_Calls_Remote => -1,
12724 Pragma_Annotate => -1,
12725 Pragma_Assert => -1,
12726 Pragma_Assertion_Policy => 0,
12727 Pragma_Assume_No_Invalid_Values => 0,
12728 Pragma_Asynchronous => -1,
12729 Pragma_Atomic => 0,
12730 Pragma_Atomic_Components => 0,
12731 Pragma_Attach_Handler => -1,
12732 Pragma_Check => 99,
12733 Pragma_Check_Name => 0,
12734 Pragma_Check_Policy => 0,
12735 Pragma_CIL_Constructor => -1,
12736 Pragma_CPP_Class => 0,
12737 Pragma_CPP_Constructor => 0,
12738 Pragma_CPP_Virtual => 0,
12739 Pragma_CPP_Vtable => 0,
12740 Pragma_C_Pass_By_Copy => 0,
12741 Pragma_Comment => 0,
12742 Pragma_Common_Object => -1,
12743 Pragma_Compile_Time_Error => -1,
12744 Pragma_Compile_Time_Warning => -1,
12745 Pragma_Compiler_Unit => 0,
12746 Pragma_Complete_Representation => 0,
12747 Pragma_Complex_Representation => 0,
12748 Pragma_Component_Alignment => -1,
12749 Pragma_Controlled => 0,
12750 Pragma_Convention => 0,
12751 Pragma_Convention_Identifier => 0,
12752 Pragma_Debug => -1,
12753 Pragma_Debug_Policy => 0,
12754 Pragma_Detect_Blocking => -1,
12755 Pragma_Dimension => -1,
12756 Pragma_Discard_Names => 0,
12757 Pragma_Elaborate => -1,
12758 Pragma_Elaborate_All => -1,
12759 Pragma_Elaborate_Body => -1,
12760 Pragma_Elaboration_Checks => -1,
12761 Pragma_Eliminate => -1,
12762 Pragma_Export => -1,
12763 Pragma_Export_Exception => -1,
12764 Pragma_Export_Function => -1,
12765 Pragma_Export_Object => -1,
12766 Pragma_Export_Procedure => -1,
12767 Pragma_Export_Value => -1,
12768 Pragma_Export_Valued_Procedure => -1,
12769 Pragma_Extend_System => -1,
12770 Pragma_Extensions_Allowed => -1,
12771 Pragma_External => -1,
12772 Pragma_Favor_Top_Level => -1,
12773 Pragma_External_Name_Casing => -1,
12774 Pragma_Fast_Math => -1,
12775 Pragma_Finalize_Storage_Only => 0,
12776 Pragma_Float_Representation => 0,
12777 Pragma_Ident => -1,
12778 Pragma_Implemented_By_Entry => -1,
12779 Pragma_Implicit_Packing => 0,
12780 Pragma_Import => +2,
12781 Pragma_Import_Exception => 0,
12782 Pragma_Import_Function => 0,
12783 Pragma_Import_Object => 0,
12784 Pragma_Import_Procedure => 0,
12785 Pragma_Import_Valued_Procedure => 0,
12786 Pragma_Initialize_Scalars => -1,
12787 Pragma_Inline => 0,
12788 Pragma_Inline_Always => 0,
12789 Pragma_Inline_Generic => 0,
12790 Pragma_Inspection_Point => -1,
12791 Pragma_Interface => +2,
12792 Pragma_Interface_Name => +2,
12793 Pragma_Interrupt_Handler => -1,
12794 Pragma_Interrupt_Priority => -1,
12795 Pragma_Interrupt_State => -1,
12796 Pragma_Java_Constructor => -1,
12797 Pragma_Java_Interface => -1,
12798 Pragma_Keep_Names => 0,
12799 Pragma_License => -1,
12800 Pragma_Link_With => -1,
12801 Pragma_Linker_Alias => -1,
12802 Pragma_Linker_Constructor => -1,
12803 Pragma_Linker_Destructor => -1,
12804 Pragma_Linker_Options => -1,
12805 Pragma_Linker_Section => -1,
12807 Pragma_Locking_Policy => -1,
12808 Pragma_Long_Float => -1,
12809 Pragma_Machine_Attribute => -1,
12811 Pragma_Main_Storage => -1,
12812 Pragma_Memory_Size => -1,
12813 Pragma_No_Return => 0,
12814 Pragma_No_Body => 0,
12815 Pragma_No_Run_Time => -1,
12816 Pragma_No_Strict_Aliasing => -1,
12817 Pragma_Normalize_Scalars => -1,
12818 Pragma_Obsolescent => 0,
12819 Pragma_Optimize => -1,
12820 Pragma_Optimize_Alignment => -1,
12823 Pragma_Passive => -1,
12824 Pragma_Preelaborable_Initialization => -1,
12825 Pragma_Polling => -1,
12826 Pragma_Persistent_BSS => 0,
12827 Pragma_Postcondition => -1,
12828 Pragma_Precondition => -1,
12829 Pragma_Preelaborate => -1,
12830 Pragma_Preelaborate_05 => -1,
12831 Pragma_Priority => -1,
12832 Pragma_Priority_Specific_Dispatching => -1,
12833 Pragma_Profile => 0,
12834 Pragma_Profile_Warnings => 0,
12835 Pragma_Propagate_Exceptions => -1,
12836 Pragma_Psect_Object => -1,
12838 Pragma_Pure_05 => -1,
12839 Pragma_Pure_Function => -1,
12840 Pragma_Queuing_Policy => -1,
12841 Pragma_Ravenscar => -1,
12842 Pragma_Relative_Deadline => -1,
12843 Pragma_Remote_Call_Interface => -1,
12844 Pragma_Remote_Types => -1,
12845 Pragma_Restricted_Run_Time => -1,
12846 Pragma_Restriction_Warnings => -1,
12847 Pragma_Restrictions => -1,
12848 Pragma_Reviewable => -1,
12849 Pragma_Short_Circuit_And_Or => -1,
12850 Pragma_Share_Generic => -1,
12851 Pragma_Shared => -1,
12852 Pragma_Shared_Passive => -1,
12853 Pragma_Source_File_Name => -1,
12854 Pragma_Source_File_Name_Project => -1,
12855 Pragma_Source_Reference => -1,
12856 Pragma_Storage_Size => -1,
12857 Pragma_Storage_Unit => -1,
12858 Pragma_Static_Elaboration_Desired => -1,
12859 Pragma_Stream_Convert => -1,
12860 Pragma_Style_Checks => -1,
12861 Pragma_Subtitle => -1,
12862 Pragma_Suppress => 0,
12863 Pragma_Suppress_Exception_Locations => 0,
12864 Pragma_Suppress_All => -1,
12865 Pragma_Suppress_Debug_Info => 0,
12866 Pragma_Suppress_Initialization => 0,
12867 Pragma_System_Name => -1,
12868 Pragma_Task_Dispatching_Policy => -1,
12869 Pragma_Task_Info => -1,
12870 Pragma_Task_Name => -1,
12871 Pragma_Task_Storage => 0,
12872 Pragma_Thread_Local_Storage => 0,
12873 Pragma_Time_Slice => -1,
12874 Pragma_Title => -1,
12875 Pragma_Unchecked_Union => 0,
12876 Pragma_Unimplemented_Unit => -1,
12877 Pragma_Universal_Aliasing => -1,
12878 Pragma_Universal_Data => -1,
12879 Pragma_Unmodified => -1,
12880 Pragma_Unreferenced => -1,
12881 Pragma_Unreferenced_Objects => -1,
12882 Pragma_Unreserve_All_Interrupts => -1,
12883 Pragma_Unsuppress => 0,
12884 Pragma_Use_VADS_Size => -1,
12885 Pragma_Validity_Checks => -1,
12886 Pragma_Volatile => 0,
12887 Pragma_Volatile_Components => 0,
12888 Pragma_Warnings => -1,
12889 Pragma_Weak_External => -1,
12890 Pragma_Wide_Character_Encoding => 0,
12891 Unknown_Pragma => 0);
12893 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
12902 if Nkind (P) /= N_Pragma_Argument_Association then
12906 Id := Get_Pragma_Id (Parent (P));
12907 C := Sig_Flags (Id);
12919 -- For pragma Check, the first argument is not significant,
12920 -- the second and the third (if present) arguments are
12923 when Pragma_Check =>
12925 P = First (Pragma_Argument_Associations (Parent (P)));
12928 raise Program_Error;
12932 A := First (Pragma_Argument_Associations (Parent (P)));
12933 for J in 1 .. C - 1 loop
12941 return A = P; -- is this wrong way round ???
12944 end Is_Non_Significant_Pragma_Reference;
12946 ------------------------------
12947 -- Is_Pragma_String_Literal --
12948 ------------------------------
12950 -- This function returns true if the corresponding pragma argument is a
12951 -- static string expression. These are the only cases in which string
12952 -- literals can appear as pragma arguments. We also allow a string literal
12953 -- as the first argument to pragma Assert (although it will of course
12954 -- always generate a type error).
12956 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
12957 Pragn : constant Node_Id := Parent (Par);
12958 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
12959 Pname : constant Name_Id := Pragma_Name (Pragn);
12965 N := First (Assoc);
12972 if Pname = Name_Assert then
12975 elsif Pname = Name_Export then
12978 elsif Pname = Name_Ident then
12981 elsif Pname = Name_Import then
12984 elsif Pname = Name_Interface_Name then
12987 elsif Pname = Name_Linker_Alias then
12990 elsif Pname = Name_Linker_Section then
12993 elsif Pname = Name_Machine_Attribute then
12996 elsif Pname = Name_Source_File_Name then
12999 elsif Pname = Name_Source_Reference then
13002 elsif Pname = Name_Title then
13005 elsif Pname = Name_Subtitle then
13011 end Is_Pragma_String_Literal;
13013 --------------------------------------
13014 -- Process_Compilation_Unit_Pragmas --
13015 --------------------------------------
13017 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
13019 -- A special check for pragma Suppress_All, a very strange DEC pragma,
13020 -- strange because it comes at the end of the unit. If we have a pragma
13021 -- Suppress_All in the Pragmas_After of the current unit, then we insert
13022 -- a pragma Suppress (All_Checks) at the start of the context clause to
13023 -- ensure the correct processing.
13026 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
13030 if Present (PA) then
13032 while Present (P) loop
13033 if Pragma_Name (P) = Name_Suppress_All then
13034 Prepend_To (Context_Items (N),
13035 Make_Pragma (Sloc (P),
13036 Chars => Name_Suppress,
13037 Pragma_Argument_Associations => New_List (
13038 Make_Pragma_Argument_Association (Sloc (P),
13040 Make_Identifier (Sloc (P),
13041 Chars => Name_All_Checks)))));
13049 end Process_Compilation_Unit_Pragmas;
13060 --------------------------------
13061 -- Set_Encoded_Interface_Name --
13062 --------------------------------
13064 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
13065 Str : constant String_Id := Strval (S);
13066 Len : constant Int := String_Length (Str);
13071 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
13074 -- Stores encoded value of character code CC. The encoding we use an
13075 -- underscore followed by four lower case hex digits.
13081 procedure Encode is
13083 Store_String_Char (Get_Char_Code ('_'));
13085 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
13087 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
13089 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
13091 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
13094 -- Start of processing for Set_Encoded_Interface_Name
13097 -- If first character is asterisk, this is a link name, and we leave it
13098 -- completely unmodified. We also ignore null strings (the latter case
13099 -- happens only in error cases) and no encoding should occur for Java or
13100 -- AAMP interface names.
13103 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
13104 or else VM_Target /= No_VM
13105 or else AAMP_On_Target
13107 Set_Interface_Name (E, S);
13112 CC := Get_String_Char (Str, J);
13114 exit when not In_Character_Range (CC);
13116 C := Get_Character (CC);
13118 exit when C /= '_' and then C /= '$'
13119 and then C not in '0' .. '9'
13120 and then C not in 'a' .. 'z'
13121 and then C not in 'A' .. 'Z';
13124 Set_Interface_Name (E, S);
13132 -- Here we need to encode. The encoding we use as follows:
13133 -- three underscores + four hex digits (lower case)
13137 for J in 1 .. String_Length (Str) loop
13138 CC := Get_String_Char (Str, J);
13140 if not In_Character_Range (CC) then
13143 C := Get_Character (CC);
13145 if C = '_' or else C = '$'
13146 or else C in '0' .. '9'
13147 or else C in 'a' .. 'z'
13148 or else C in 'A' .. 'Z'
13150 Store_String_Char (CC);
13157 Set_Interface_Name (E,
13158 Make_String_Literal (Sloc (S),
13159 Strval => End_String));
13161 end Set_Encoded_Interface_Name;
13163 -------------------
13164 -- Set_Unit_Name --
13165 -------------------
13167 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
13172 if Nkind (N) = N_Identifier
13173 and then Nkind (With_Item) = N_Identifier
13175 Set_Entity (N, Entity (With_Item));
13177 elsif Nkind (N) = N_Selected_Component then
13178 Change_Selected_Component_To_Expanded_Name (N);
13179 Set_Entity (N, Entity (With_Item));
13180 Set_Entity (Selector_Name (N), Entity (N));
13182 Pref := Prefix (N);
13183 Scop := Scope (Entity (N));
13184 while Nkind (Pref) = N_Selected_Component loop
13185 Change_Selected_Component_To_Expanded_Name (Pref);
13186 Set_Entity (Selector_Name (Pref), Scop);
13187 Set_Entity (Pref, Scop);
13188 Pref := Prefix (Pref);
13189 Scop := Scope (Scop);
13192 Set_Entity (Pref, Scop);
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