1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2009, 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 Restrict; use Restrict;
50 with Rident; use Rident;
51 with Rtsfind; use Rtsfind;
53 with Sem_Aux; use Sem_Aux;
54 with Sem_Ch3; use Sem_Ch3;
55 with Sem_Ch6; use Sem_Ch6;
56 with Sem_Ch8; use Sem_Ch8;
57 with Sem_Ch12; use Sem_Ch12;
58 with Sem_Ch13; use Sem_Ch13;
59 with Sem_Dist; use Sem_Dist;
60 with Sem_Elim; use Sem_Elim;
61 with Sem_Eval; use Sem_Eval;
62 with Sem_Intr; use Sem_Intr;
63 with Sem_Mech; use Sem_Mech;
64 with Sem_Res; use Sem_Res;
65 with Sem_Type; use Sem_Type;
66 with Sem_Util; use Sem_Util;
67 with Sem_VFpt; use Sem_VFpt;
68 with Sem_Warn; use Sem_Warn;
69 with Stand; use Stand;
70 with Sinfo; use Sinfo;
71 with Sinfo.CN; use Sinfo.CN;
72 with Sinput; use Sinput;
73 with Snames; use Snames;
74 with Stringt; use Stringt;
75 with Stylesw; use Stylesw;
77 with Targparm; use Targparm;
78 with Tbuild; use Tbuild;
80 with Uintp; use Uintp;
81 with Uname; use Uname;
82 with Urealp; use Urealp;
83 with Validsw; use Validsw;
85 package body Sem_Prag is
87 ----------------------------------------------
88 -- Common Handling of Import-Export Pragmas --
89 ----------------------------------------------
91 -- In the following section, a number of Import_xxx and Export_xxx
92 -- pragmas are defined by GNAT. These are compatible with the DEC
93 -- pragmas of the same name, and all have the following common
94 -- form and processing:
97 -- [Internal =>] LOCAL_NAME
98 -- [, [External =>] EXTERNAL_SYMBOL]
99 -- [, other optional parameters ]);
102 -- [Internal =>] LOCAL_NAME
103 -- [, [External =>] EXTERNAL_SYMBOL]
104 -- [, other optional parameters ]);
106 -- EXTERNAL_SYMBOL ::=
108 -- | static_string_EXPRESSION
110 -- The internal LOCAL_NAME designates the entity that is imported or
111 -- exported, and must refer to an entity in the current declarative
112 -- part (as required by the rules for LOCAL_NAME).
114 -- The external linker name is designated by the External parameter if
115 -- given, or the Internal parameter if not (if there is no External
116 -- parameter, the External parameter is a copy of the Internal name).
118 -- If the External parameter is given as a string, then this string is
119 -- treated as an external name (exactly as though it had been given as an
120 -- External_Name parameter for a normal Import pragma).
122 -- If the External parameter is given as an identifier (or there is no
123 -- External parameter, so that the Internal identifier is used), then
124 -- the external name is the characters of the identifier, translated
125 -- to all upper case letters for OpenVMS versions of GNAT, and to all
126 -- lower case letters for all other versions
128 -- Note: the external name specified or implied by any of these special
129 -- Import_xxx or Export_xxx pragmas override an external or link name
130 -- specified in a previous Import or Export pragma.
132 -- Note: these and all other DEC-compatible GNAT pragmas allow full use of
133 -- named notation, following the standard rules for subprogram calls, i.e.
134 -- parameters can be given in any order if named notation is used, and
135 -- positional and named notation can be mixed, subject to the rule that all
136 -- positional parameters must appear first.
138 -- Note: All these pragmas are implemented exactly following the DEC design
139 -- and implementation and are intended to be fully compatible with the use
140 -- of these pragmas in the DEC Ada compiler.
142 --------------------------------------------
143 -- Checking for Duplicated External Names --
144 --------------------------------------------
146 -- It is suspicious if two separate Export pragmas use the same external
147 -- name. The following table is used to diagnose this situation so that
148 -- an appropriate warning can be issued.
150 -- The Node_Id stored is for the N_String_Literal node created to hold
151 -- the value of the external name. The Sloc of this node is used to
152 -- cross-reference the location of the duplication.
154 package Externals is new Table.Table (
155 Table_Component_Type => Node_Id,
156 Table_Index_Type => Int,
157 Table_Low_Bound => 0,
158 Table_Initial => 100,
159 Table_Increment => 100,
160 Table_Name => "Name_Externals");
162 -------------------------------------
163 -- Local Subprograms and Variables --
164 -------------------------------------
166 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
167 -- This routine is used for possible casing adjustment of an explicit
168 -- external name supplied as a string literal (the node N), according to
169 -- the casing requirement of Opt.External_Name_Casing. If this is set to
170 -- As_Is, then the string literal is returned unchanged, but if it is set
171 -- to Uppercase or Lowercase, then a new string literal with appropriate
172 -- casing is constructed.
174 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
175 -- If Def_Id refers to a renamed subprogram, then the base subprogram (the
176 -- original one, following the renaming chain) is returned. Otherwise the
177 -- entity is returned unchanged. Should be in Einfo???
179 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
180 -- All the routines that check pragma arguments take either a pragma
181 -- argument association (in which case the expression of the argument
182 -- association is checked), or the expression directly. The function
183 -- Get_Pragma_Arg is a utility used to deal with these two cases. If Arg
184 -- is a pragma argument association node, then its expression is returned,
185 -- otherwise Arg is returned unchanged.
188 -- This is a dummy function called by the processing for pragma Reviewable.
189 -- It is there for assisting front end debugging. By placing a Reviewable
190 -- pragma in the source program, a breakpoint on rv catches this place in
191 -- the source, allowing convenient stepping to the point of interest.
193 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
194 -- Place semantic information on the argument of an Elaborate/Elaborate_All
195 -- pragma. Entity name for unit and its parents is taken from item in
196 -- previous with_clause that mentions the unit.
198 -------------------------------
199 -- Adjust_External_Name_Case --
200 -------------------------------
202 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
206 -- Adjust case of literal if required
208 if Opt.External_Name_Exp_Casing = As_Is then
212 -- Copy existing string
218 for J in 1 .. String_Length (Strval (N)) loop
219 CC := Get_String_Char (Strval (N), J);
221 if Opt.External_Name_Exp_Casing = Uppercase
222 and then CC >= Get_Char_Code ('a')
223 and then CC <= Get_Char_Code ('z')
225 Store_String_Char (CC - 32);
227 elsif Opt.External_Name_Exp_Casing = Lowercase
228 and then CC >= Get_Char_Code ('A')
229 and then CC <= Get_Char_Code ('Z')
231 Store_String_Char (CC + 32);
234 Store_String_Char (CC);
239 Make_String_Literal (Sloc (N),
240 Strval => End_String);
242 end Adjust_External_Name_Case;
244 ------------------------------
245 -- Analyze_PPC_In_Decl_Part --
246 ------------------------------
248 procedure Analyze_PPC_In_Decl_Part (N : Node_Id; S : Entity_Id) is
249 Arg1 : constant Node_Id :=
250 First (Pragma_Argument_Associations (N));
251 Arg2 : constant Node_Id := Next (Arg1);
254 -- Install formals and push subprogram spec onto scope stack so that we
255 -- can see the formals from the pragma.
260 -- Preanalyze the boolean expression, we treat this as a spec expression
261 -- (i.e. similar to a default expression).
263 Preanalyze_Spec_Expression
264 (Get_Pragma_Arg (Arg1), Standard_Boolean);
266 -- If there is a message argument, analyze it the same way
268 if Present (Arg2) then
269 Preanalyze_Spec_Expression
270 (Get_Pragma_Arg (Arg2), Standard_String);
273 -- Remove the subprogram from the scope stack now that the pre-analysis
274 -- of the precondition/postcondition is done.
277 end Analyze_PPC_In_Decl_Part;
283 procedure Analyze_Pragma (N : Node_Id) is
284 Loc : constant Source_Ptr := Sloc (N);
285 Pname : constant Name_Id := Pragma_Name (N);
288 Pragma_Exit : exception;
289 -- This exception is used to exit pragma processing completely. It is
290 -- used when an error is detected, and no further processing is
291 -- required. It is also used if an earlier error has left the tree in
292 -- a state where the pragma should not be processed.
295 -- Number of pragma argument associations
301 -- First four pragma arguments (pragma argument association nodes, or
302 -- Empty if the corresponding argument does not exist).
304 type Name_List is array (Natural range <>) of Name_Id;
305 type Args_List is array (Natural range <>) of Node_Id;
306 -- Types used for arguments to Check_Arg_Order and Gather_Associations
308 procedure Ada_2005_Pragma;
309 -- Called for pragmas defined in Ada 2005, that are not in Ada 95. In
310 -- Ada 95 mode, these are implementation defined pragmas, so should be
311 -- caught by the No_Implementation_Pragmas restriction
313 procedure Check_Ada_83_Warning;
314 -- Issues a warning message for the current pragma if operating in Ada
315 -- 83 mode (used for language pragmas that are not a standard part of
316 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
319 procedure Check_Arg_Count (Required : Nat);
320 -- Check argument count for pragma is equal to given parameter. If not,
321 -- then issue an error message and raise Pragma_Exit.
323 -- Note: all routines whose name is Check_Arg_Is_xxx take an argument
324 -- Arg which can either be a pragma argument association, in which case
325 -- the check is applied to the expression of the association or an
326 -- expression directly.
328 procedure Check_Arg_Is_External_Name (Arg : Node_Id);
329 -- Check that an argument has the right form for an EXTERNAL_NAME
330 -- parameter of an extended import/export pragma. The rule is that the
331 -- name must be an identifier or string literal (in Ada 83 mode) or a
332 -- static string expression (in Ada 95 mode).
334 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
335 -- Check the specified argument Arg to make sure that it is an
336 -- identifier. If not give error and raise Pragma_Exit.
338 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
339 -- Check the specified argument Arg to make sure that it is an integer
340 -- literal. If not give error and raise Pragma_Exit.
342 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
343 -- Check the specified argument Arg to make sure that it has the proper
344 -- syntactic form for a local name and meets the semantic requirements
345 -- for a local name. The local name is analyzed as part of the
346 -- processing for this call. In addition, the local name is required
347 -- to represent an entity at the library level.
349 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
350 -- Check the specified argument Arg to make sure that it has the proper
351 -- syntactic form for a local name and meets the semantic requirements
352 -- for a local name. The local name is analyzed as part of the
353 -- processing for this call.
355 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
356 -- Check the specified argument Arg to make sure that it is a valid
357 -- locking policy name. If not give error and raise Pragma_Exit.
359 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
360 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
361 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3, N4 : Name_Id);
362 -- Check the specified argument Arg to make sure that it is an
363 -- identifier whose name matches either N1 or N2 (or N3 if present).
364 -- If not then give error and raise Pragma_Exit.
366 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
367 -- Check the specified argument Arg to make sure that it is a valid
368 -- queuing policy name. If not give error and raise Pragma_Exit.
370 procedure Check_Arg_Is_Static_Expression
372 Typ : Entity_Id := Empty);
373 -- Check the specified argument Arg to make sure that it is a static
374 -- expression of the given type (i.e. it will be analyzed and resolved
375 -- using this type, which can be any valid argument to Resolve, e.g.
376 -- Any_Integer is OK). If not, given error and raise Pragma_Exit. If
377 -- Typ is left Empty, then any static expression is allowed.
379 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
380 -- Check the specified argument Arg to make sure that it is a string
381 -- literal. If not give error and raise Pragma_Exit
383 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
384 -- Check the specified argument Arg to make sure that it is a valid task
385 -- dispatching policy name. If not give error and raise Pragma_Exit.
387 procedure Check_Arg_Order (Names : Name_List);
388 -- Checks for an instance of two arguments with identifiers for the
389 -- current pragma which are not in the sequence indicated by Names,
390 -- and if so, generates a fatal message about bad order of arguments.
392 procedure Check_At_Least_N_Arguments (N : Nat);
393 -- Check there are at least N arguments present
395 procedure Check_At_Most_N_Arguments (N : Nat);
396 -- Check there are no more than N arguments present
398 procedure Check_Component (Comp : Node_Id);
399 -- Examine Unchecked_Union component for correct use of per-object
400 -- constrained subtypes, and for restrictions on finalizable components.
402 procedure Check_Duplicated_Export_Name (Nam : Node_Id);
403 -- Nam is an N_String_Literal node containing the external name set by
404 -- an Import or Export pragma (or extended Import or Export pragma).
405 -- This procedure checks for possible duplications if this is the export
406 -- case, and if found, issues an appropriate error message.
408 procedure Check_First_Subtype (Arg : Node_Id);
409 -- Checks that Arg, whose expression is an entity name referencing a
410 -- subtype, does not reference a type that is not a first subtype.
412 procedure Check_In_Main_Program;
413 -- Common checks for pragmas that appear within a main program
414 -- (Priority, Main_Storage, Time_Slice, Relative_Deadline).
416 procedure Check_Interrupt_Or_Attach_Handler;
417 -- Common processing for first argument of pragma Interrupt_Handler or
418 -- pragma Attach_Handler.
420 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
421 -- Check that pragma appears in a declarative part, or in a package
422 -- specification, i.e. that it does not occur in a statement sequence
425 procedure Check_No_Identifier (Arg : Node_Id);
426 -- Checks that the given argument does not have an identifier. If
427 -- an identifier is present, then an error message is issued, and
428 -- Pragma_Exit is raised.
430 procedure Check_No_Identifiers;
431 -- Checks that none of the arguments to the pragma has an identifier.
432 -- If any argument has an identifier, then an error message is issued,
433 -- and Pragma_Exit is raised.
435 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
436 -- Checks if the given argument has an identifier, and if so, requires
437 -- it to match the given identifier name. If there is a non-matching
438 -- identifier, then an error message is given and Error_Pragmas raised.
440 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
441 -- Checks if the given argument has an identifier, and if so, requires
442 -- it to match the given identifier name. If there is a non-matching
443 -- identifier, then an error message is given and Error_Pragmas raised.
444 -- In this version of the procedure, the identifier name is given as
445 -- a string with lower case letters.
447 procedure Check_Precondition_Postcondition (In_Body : out Boolean);
448 -- Called to process a precondition or postcondition pragma. There are
451 -- The pragma appears after a subprogram spec
453 -- If the corresponding check is not enabled, the pragma is analyzed
454 -- but otherwise ignored and control returns with In_Body set False.
456 -- If the check is enabled, then the first step is to analyze the
457 -- pragma, but this is skipped if the subprogram spec appears within
458 -- a package specification (because this is the case where we delay
459 -- analysis till the end of the spec). Then (whether or not it was
460 -- analyzed), the pragma is chained to the subprogram in question
461 -- (using Spec_PPC_List and Next_Pragma) and control returns to the
462 -- caller with In_Body set False.
464 -- The pragma appears at the start of subprogram body declarations
466 -- In this case an immediate return to the caller is made with
467 -- In_Body set True, and the pragma is NOT analyzed.
469 -- In all other cases, an error message for bad placement is given
471 procedure Check_Static_Constraint (Constr : Node_Id);
472 -- Constr is a constraint from an N_Subtype_Indication node from a
473 -- component constraint in an Unchecked_Union type. This routine checks
474 -- that the constraint is static as required by the restrictions for
477 procedure Check_Valid_Configuration_Pragma;
478 -- Legality checks for placement of a configuration pragma
480 procedure Check_Valid_Library_Unit_Pragma;
481 -- Legality checks for library unit pragmas. A special case arises for
482 -- pragmas in generic instances that come from copies of the original
483 -- library unit pragmas in the generic templates. In the case of other
484 -- than library level instantiations these can appear in contexts which
485 -- would normally be invalid (they only apply to the original template
486 -- and to library level instantiations), and they are simply ignored,
487 -- which is implemented by rewriting them as null statements.
489 procedure Check_Variant (Variant : Node_Id);
490 -- Check Unchecked_Union variant for lack of nested variants and
491 -- presence of at least one component.
493 procedure Error_Pragma (Msg : String);
494 pragma No_Return (Error_Pragma);
495 -- Outputs error message for current pragma. The message contains a %
496 -- that will be replaced with the pragma name, and the flag is placed
497 -- on the pragma itself. Pragma_Exit is then raised.
499 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
500 pragma No_Return (Error_Pragma_Arg);
501 -- Outputs error message for current pragma. The message may contain
502 -- a % that will be replaced with the pragma name. The parameter Arg
503 -- may either be a pragma argument association, in which case the flag
504 -- is placed on the expression of this association, or an expression,
505 -- in which case the flag is placed directly on the expression. The
506 -- message is placed using Error_Msg_N, so the message may also contain
507 -- an & insertion character which will reference the given Arg value.
508 -- After placing the message, Pragma_Exit is raised.
510 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
511 pragma No_Return (Error_Pragma_Arg);
512 -- Similar to above form of Error_Pragma_Arg except that two messages
513 -- are provided, the second is a continuation comment starting with \.
515 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
516 pragma No_Return (Error_Pragma_Arg_Ident);
517 -- Outputs error message for current pragma. The message may contain
518 -- a % that will be replaced with the pragma name. The parameter Arg
519 -- must be a pragma argument association with a non-empty identifier
520 -- (i.e. its Chars field must be set), and the error message is placed
521 -- on the identifier. The message is placed using Error_Msg_N so
522 -- the message may also contain an & insertion character which will
523 -- reference the identifier. After placing the message, Pragma_Exit
526 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id);
527 pragma No_Return (Error_Pragma_Ref);
528 -- Outputs error message for current pragma. The message may contain
529 -- a % that will be replaced with the pragma name. The parameter Ref
530 -- must be an entity whose name can be referenced by & and sloc by #.
531 -- After placing the message, Pragma_Exit is raised.
533 function Find_Lib_Unit_Name return Entity_Id;
534 -- Used for a library unit pragma to find the entity to which the
535 -- library unit pragma applies, returns the entity found.
537 procedure Find_Program_Unit_Name (Id : Node_Id);
538 -- If the pragma is a compilation unit pragma, the id must denote the
539 -- compilation unit in the same compilation, and the pragma must appear
540 -- in the list of preceding or trailing pragmas. If it is a program
541 -- unit pragma that is not a compilation unit pragma, then the
542 -- identifier must be visible.
544 function Find_Unique_Parameterless_Procedure
546 Arg : Node_Id) return Entity_Id;
547 -- Used for a procedure pragma to find the unique parameterless
548 -- procedure identified by Name, returns it if it exists, otherwise
549 -- errors out and uses Arg as the pragma argument for the message.
551 procedure Gather_Associations
553 Args : out Args_List);
554 -- This procedure is used to gather the arguments for a pragma that
555 -- permits arbitrary ordering of parameters using the normal rules
556 -- for named and positional parameters. The Names argument is a list
557 -- of Name_Id values that corresponds to the allowed pragma argument
558 -- association identifiers in order. The result returned in Args is
559 -- a list of corresponding expressions that are the pragma arguments.
560 -- Note that this is a list of expressions, not of pragma argument
561 -- associations (Gather_Associations has completely checked all the
562 -- optional identifiers when it returns). An entry in Args is Empty
563 -- on return if the corresponding argument is not present.
565 procedure GNAT_Pragma;
566 -- Called for all GNAT defined pragmas to check the relevant restriction
567 -- (No_Implementation_Pragmas).
569 function Is_Before_First_Decl
570 (Pragma_Node : Node_Id;
571 Decls : List_Id) return Boolean;
572 -- Return True if Pragma_Node is before the first declarative item in
573 -- Decls where Decls is the list of declarative items.
575 function Is_Configuration_Pragma return Boolean;
576 -- Determines if the placement of the current pragma is appropriate
577 -- for a configuration pragma.
579 function Is_In_Context_Clause return Boolean;
580 -- Returns True if pragma appears within the context clause of a unit,
581 -- and False for any other placement (does not generate any messages).
583 function Is_Static_String_Expression (Arg : Node_Id) return Boolean;
584 -- Analyzes the argument, and determines if it is a static string
585 -- expression, returns True if so, False if non-static or not String.
587 procedure Pragma_Misplaced;
588 pragma No_Return (Pragma_Misplaced);
589 -- Issue fatal error message for misplaced pragma
591 procedure Process_Atomic_Shared_Volatile;
592 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
593 -- Shared is an obsolete Ada 83 pragma, treated as being identical
594 -- in effect to pragma Atomic.
596 procedure Process_Compile_Time_Warning_Or_Error;
597 -- Common processing for Compile_Time_Error and Compile_Time_Warning
599 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
600 -- Common processing for Convention, Interface, Import and Export.
601 -- Checks first two arguments of pragma, and sets the appropriate
602 -- convention value in the specified entity or entities. On return
603 -- C is the convention, E is the referenced entity.
605 procedure Process_Extended_Import_Export_Exception_Pragma
606 (Arg_Internal : Node_Id;
607 Arg_External : Node_Id;
610 -- Common processing for the pragmas Import/Export_Exception. The three
611 -- arguments correspond to the three named parameters of the pragma. An
612 -- argument is empty if the corresponding parameter is not present in
615 procedure Process_Extended_Import_Export_Object_Pragma
616 (Arg_Internal : Node_Id;
617 Arg_External : Node_Id;
619 -- Common processing for the pragmas Import/Export_Object. The three
620 -- arguments correspond to the three named parameters of the pragmas. An
621 -- argument is empty if the corresponding parameter is not present in
624 procedure Process_Extended_Import_Export_Internal_Arg
625 (Arg_Internal : Node_Id := Empty);
626 -- Common processing for all extended Import and Export pragmas. The
627 -- argument is the pragma parameter for the Internal argument. If
628 -- Arg_Internal is empty or inappropriate, an error message is posted.
629 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
630 -- set to identify the referenced entity.
632 procedure Process_Extended_Import_Export_Subprogram_Pragma
633 (Arg_Internal : Node_Id;
634 Arg_External : Node_Id;
635 Arg_Parameter_Types : Node_Id;
636 Arg_Result_Type : Node_Id := Empty;
637 Arg_Mechanism : Node_Id;
638 Arg_Result_Mechanism : Node_Id := Empty;
639 Arg_First_Optional_Parameter : Node_Id := Empty);
640 -- Common processing for all extended Import and Export pragmas applying
641 -- to subprograms. The caller omits any arguments that do not apply to
642 -- the pragma in question (for example, Arg_Result_Type can be non-Empty
643 -- only in the Import_Function and Export_Function cases). The argument
644 -- names correspond to the allowed pragma association identifiers.
646 procedure Process_Generic_List;
647 -- Common processing for Share_Generic and Inline_Generic
649 procedure Process_Import_Or_Interface;
650 -- Common processing for Import of Interface
652 procedure Process_Inline (Active : Boolean);
653 -- Common processing for Inline and Inline_Always. The parameter
654 -- indicates if the inline pragma is active, i.e. if it should actually
655 -- cause inlining to occur.
657 procedure Process_Interface_Name
658 (Subprogram_Def : Entity_Id;
661 -- Given the last two arguments of pragma Import, pragma Export, or
662 -- pragma Interface_Name, performs validity checks and sets the
663 -- Interface_Name field of the given subprogram entity to the
664 -- appropriate external or link name, depending on the arguments given.
665 -- Ext_Arg is always present, but Link_Arg may be missing. Note that
666 -- Ext_Arg may represent the Link_Name if Link_Arg is missing, and
667 -- appropriate named notation is used for Ext_Arg. If neither Ext_Arg
668 -- nor Link_Arg is present, the interface name is set to the default
669 -- from the subprogram name.
671 procedure Process_Interrupt_Or_Attach_Handler;
672 -- Common processing for Interrupt and Attach_Handler pragmas
674 procedure Process_Restrictions_Or_Restriction_Warnings (Warn : Boolean);
675 -- Common processing for Restrictions and Restriction_Warnings pragmas.
676 -- Warn is True for Restriction_Warnings, or for Restrictions if the
677 -- flag Treat_Restrictions_As_Warnings is set, and False if this flag
678 -- is not set in the Restrictions case.
680 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
681 -- Common processing for Suppress and Unsuppress. The boolean parameter
682 -- Suppress_Case is True for the Suppress case, and False for the
685 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
686 -- This procedure sets the Is_Exported flag for the given entity,
687 -- checking that the entity was not previously imported. Arg is
688 -- the argument that specified the entity. A check is also made
689 -- for exporting inappropriate entities.
691 procedure Set_Extended_Import_Export_External_Name
692 (Internal_Ent : Entity_Id;
693 Arg_External : Node_Id);
694 -- Common processing for all extended import export pragmas. The first
695 -- argument, Internal_Ent, is the internal entity, which has already
696 -- been checked for validity by the caller. Arg_External is from the
697 -- Import or Export pragma, and may be null if no External parameter
698 -- was present. If Arg_External is present and is a non-null string
699 -- (a null string is treated as the default), then the Interface_Name
700 -- field of Internal_Ent is set appropriately.
702 procedure Set_Imported (E : Entity_Id);
703 -- This procedure sets the Is_Imported flag for the given entity,
704 -- checking that it is not previously exported or imported.
706 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
707 -- Mech is a parameter passing mechanism (see Import_Function syntax
708 -- for MECHANISM_NAME). This routine checks that the mechanism argument
709 -- has the right form, and if not issues an error message. If the
710 -- argument has the right form then the Mechanism field of Ent is
711 -- set appropriately.
713 procedure Set_Ravenscar_Profile (N : Node_Id);
714 -- Activate the set of configuration pragmas and restrictions that make
715 -- up the Ravenscar Profile. N is the corresponding pragma node, which
716 -- is used for error messages on any constructs that violate the
719 ---------------------
720 -- Ada_2005_Pragma --
721 ---------------------
723 procedure Ada_2005_Pragma is
725 if Ada_Version <= Ada_95 then
726 Check_Restriction (No_Implementation_Pragmas, N);
730 --------------------------
731 -- Check_Ada_83_Warning --
732 --------------------------
734 procedure Check_Ada_83_Warning is
736 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
737 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
739 end Check_Ada_83_Warning;
741 ---------------------
742 -- Check_Arg_Count --
743 ---------------------
745 procedure Check_Arg_Count (Required : Nat) is
747 if Arg_Count /= Required then
748 Error_Pragma ("wrong number of arguments for pragma%");
752 --------------------------------
753 -- Check_Arg_Is_External_Name --
754 --------------------------------
756 procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
757 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
760 if Nkind (Argx) = N_Identifier then
764 Analyze_And_Resolve (Argx, Standard_String);
766 if Is_OK_Static_Expression (Argx) then
769 elsif Etype (Argx) = Any_Type then
772 -- An interesting special case, if we have a string literal and
773 -- we are in Ada 83 mode, then we allow it even though it will
774 -- not be flagged as static. This allows expected Ada 83 mode
775 -- use of external names which are string literals, even though
776 -- technically these are not static in Ada 83.
778 elsif Ada_Version = Ada_83
779 and then Nkind (Argx) = N_String_Literal
783 -- Static expression that raises Constraint_Error. This has
784 -- already been flagged, so just exit from pragma processing.
786 elsif Is_Static_Expression (Argx) then
789 -- Here we have a real error (non-static expression)
792 Error_Msg_Name_1 := Pname;
794 ("argument for pragma% must be a identifier or " &
795 "static string expression!", Argx);
799 end Check_Arg_Is_External_Name;
801 -----------------------------
802 -- Check_Arg_Is_Identifier --
803 -----------------------------
805 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
806 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
808 if Nkind (Argx) /= N_Identifier then
810 ("argument for pragma% must be identifier", Argx);
812 end Check_Arg_Is_Identifier;
814 ----------------------------------
815 -- Check_Arg_Is_Integer_Literal --
816 ----------------------------------
818 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
819 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
821 if Nkind (Argx) /= N_Integer_Literal then
823 ("argument for pragma% must be integer literal", Argx);
825 end Check_Arg_Is_Integer_Literal;
827 -------------------------------------------
828 -- Check_Arg_Is_Library_Level_Local_Name --
829 -------------------------------------------
833 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
834 -- | library_unit_NAME
836 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
838 Check_Arg_Is_Local_Name (Arg);
840 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
841 and then Comes_From_Source (N)
844 ("argument for pragma% must be library level entity", Arg);
846 end Check_Arg_Is_Library_Level_Local_Name;
848 -----------------------------
849 -- Check_Arg_Is_Local_Name --
850 -----------------------------
854 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
855 -- | library_unit_NAME
857 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
858 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
863 if Nkind (Argx) not in N_Direct_Name
864 and then (Nkind (Argx) /= N_Attribute_Reference
865 or else Present (Expressions (Argx))
866 or else Nkind (Prefix (Argx)) /= N_Identifier)
867 and then (not Is_Entity_Name (Argx)
868 or else not Is_Compilation_Unit (Entity (Argx)))
870 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
873 if Is_Entity_Name (Argx)
874 and then Scope (Entity (Argx)) /= Current_Scope
877 ("pragma% argument must be in same declarative part", Arg);
879 end Check_Arg_Is_Local_Name;
881 ---------------------------------
882 -- Check_Arg_Is_Locking_Policy --
883 ---------------------------------
885 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
886 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
889 Check_Arg_Is_Identifier (Argx);
891 if not Is_Locking_Policy_Name (Chars (Argx)) then
893 ("& is not a valid locking policy name", Argx);
895 end Check_Arg_Is_Locking_Policy;
897 -------------------------
898 -- Check_Arg_Is_One_Of --
899 -------------------------
901 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
902 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
905 Check_Arg_Is_Identifier (Argx);
907 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
908 Error_Msg_Name_2 := N1;
909 Error_Msg_Name_3 := N2;
910 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
912 end Check_Arg_Is_One_Of;
914 procedure Check_Arg_Is_One_Of
916 N1, N2, N3 : Name_Id)
918 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
921 Check_Arg_Is_Identifier (Argx);
923 if Chars (Argx) /= N1
924 and then Chars (Argx) /= N2
925 and then Chars (Argx) /= N3
927 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
929 end Check_Arg_Is_One_Of;
931 procedure Check_Arg_Is_One_Of
933 N1, N2, N3, N4 : Name_Id)
935 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
938 Check_Arg_Is_Identifier (Argx);
940 if Chars (Argx) /= N1
941 and then Chars (Argx) /= N2
942 and then Chars (Argx) /= N3
943 and then Chars (Argx) /= N4
945 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
947 end Check_Arg_Is_One_Of;
949 ---------------------------------
950 -- Check_Arg_Is_Queuing_Policy --
951 ---------------------------------
953 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
954 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
957 Check_Arg_Is_Identifier (Argx);
959 if not Is_Queuing_Policy_Name (Chars (Argx)) then
961 ("& is not a valid queuing policy name", Argx);
963 end Check_Arg_Is_Queuing_Policy;
965 ------------------------------------
966 -- Check_Arg_Is_Static_Expression --
967 ------------------------------------
969 procedure Check_Arg_Is_Static_Expression
971 Typ : Entity_Id := Empty)
973 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
976 if Present (Typ) then
977 Analyze_And_Resolve (Argx, Typ);
979 Analyze_And_Resolve (Argx);
982 if Is_OK_Static_Expression (Argx) then
985 elsif Etype (Argx) = Any_Type then
988 -- An interesting special case, if we have a string literal and we
989 -- are in Ada 83 mode, then we allow it even though it will not be
990 -- flagged as static. This allows the use of Ada 95 pragmas like
991 -- Import in Ada 83 mode. They will of course be flagged with
992 -- warnings as usual, but will not cause errors.
994 elsif Ada_Version = Ada_83
995 and then Nkind (Argx) = N_String_Literal
999 -- Static expression that raises Constraint_Error. This has already
1000 -- been flagged, so just exit from pragma processing.
1002 elsif Is_Static_Expression (Argx) then
1005 -- Finally, we have a real error
1008 Error_Msg_Name_1 := Pname;
1009 Flag_Non_Static_Expr
1010 ("argument for pragma% must be a static expression!", Argx);
1013 end Check_Arg_Is_Static_Expression;
1015 ---------------------------------
1016 -- Check_Arg_Is_String_Literal --
1017 ---------------------------------
1019 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
1020 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1022 if Nkind (Argx) /= N_String_Literal then
1024 ("argument for pragma% must be string literal", Argx);
1026 end Check_Arg_Is_String_Literal;
1028 ------------------------------------------
1029 -- Check_Arg_Is_Task_Dispatching_Policy --
1030 ------------------------------------------
1032 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
1033 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1036 Check_Arg_Is_Identifier (Argx);
1038 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
1040 ("& is not a valid task dispatching policy name", Argx);
1042 end Check_Arg_Is_Task_Dispatching_Policy;
1044 ---------------------
1045 -- Check_Arg_Order --
1046 ---------------------
1048 procedure Check_Arg_Order (Names : Name_List) is
1051 Highest_So_Far : Natural := 0;
1052 -- Highest index in Names seen do far
1056 for J in 1 .. Arg_Count loop
1057 if Chars (Arg) /= No_Name then
1058 for K in Names'Range loop
1059 if Chars (Arg) = Names (K) then
1060 if K < Highest_So_Far then
1061 Error_Msg_Name_1 := Pname;
1063 ("parameters out of order for pragma%", Arg);
1064 Error_Msg_Name_1 := Names (K);
1065 Error_Msg_Name_2 := Names (Highest_So_Far);
1066 Error_Msg_N ("\% must appear before %", Arg);
1070 Highest_So_Far := K;
1078 end Check_Arg_Order;
1080 --------------------------------
1081 -- Check_At_Least_N_Arguments --
1082 --------------------------------
1084 procedure Check_At_Least_N_Arguments (N : Nat) is
1086 if Arg_Count < N then
1087 Error_Pragma ("too few arguments for pragma%");
1089 end Check_At_Least_N_Arguments;
1091 -------------------------------
1092 -- Check_At_Most_N_Arguments --
1093 -------------------------------
1095 procedure Check_At_Most_N_Arguments (N : Nat) is
1098 if Arg_Count > N then
1100 for J in 1 .. N loop
1102 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
1105 end Check_At_Most_N_Arguments;
1107 ---------------------
1108 -- Check_Component --
1109 ---------------------
1111 procedure Check_Component (Comp : Node_Id) is
1113 if Nkind (Comp) = N_Component_Declaration then
1115 Sindic : constant Node_Id :=
1116 Subtype_Indication (Component_Definition (Comp));
1117 Typ : constant Entity_Id :=
1118 Etype (Defining_Identifier (Comp));
1120 if Nkind (Sindic) = N_Subtype_Indication then
1122 -- Ada 2005 (AI-216): If a component subtype is subject to
1123 -- a per-object constraint, then the component type shall
1124 -- be an Unchecked_Union.
1126 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
1128 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
1130 Error_Msg_N ("component subtype subject to per-object" &
1131 " constraint must be an Unchecked_Union", Comp);
1135 if Is_Controlled (Typ) then
1137 ("component of unchecked union cannot be controlled", Comp);
1139 elsif Has_Task (Typ) then
1141 ("component of unchecked union cannot have tasks", Comp);
1145 end Check_Component;
1147 ----------------------------------
1148 -- Check_Duplicated_Export_Name --
1149 ----------------------------------
1151 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
1152 String_Val : constant String_Id := Strval (Nam);
1155 -- We are only interested in the export case, and in the case of
1156 -- generics, it is the instance, not the template, that is the
1157 -- problem (the template will generate a warning in any case).
1159 if not Inside_A_Generic
1160 and then (Prag_Id = Pragma_Export
1162 Prag_Id = Pragma_Export_Procedure
1164 Prag_Id = Pragma_Export_Valued_Procedure
1166 Prag_Id = Pragma_Export_Function)
1168 for J in Externals.First .. Externals.Last loop
1169 if String_Equal (String_Val, Strval (Externals.Table (J))) then
1170 Error_Msg_Sloc := Sloc (Externals.Table (J));
1171 Error_Msg_N ("external name duplicates name given#", Nam);
1176 Externals.Append (Nam);
1178 end Check_Duplicated_Export_Name;
1180 -------------------------
1181 -- Check_First_Subtype --
1182 -------------------------
1184 procedure Check_First_Subtype (Arg : Node_Id) is
1185 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1187 if not Is_First_Subtype (Entity (Argx)) then
1189 ("pragma% cannot apply to subtype", Argx);
1191 end Check_First_Subtype;
1193 ---------------------------
1194 -- Check_In_Main_Program --
1195 ---------------------------
1197 procedure Check_In_Main_Program is
1198 P : constant Node_Id := Parent (N);
1201 -- Must be at in subprogram body
1203 if Nkind (P) /= N_Subprogram_Body then
1204 Error_Pragma ("% pragma allowed only in subprogram");
1206 -- Otherwise warn if obviously not main program
1208 elsif Present (Parameter_Specifications (Specification (P)))
1209 or else not Is_Compilation_Unit (Defining_Entity (P))
1211 Error_Msg_Name_1 := Pname;
1213 ("?pragma% is only effective in main program", N);
1215 end Check_In_Main_Program;
1217 ---------------------------------------
1218 -- Check_Interrupt_Or_Attach_Handler --
1219 ---------------------------------------
1221 procedure Check_Interrupt_Or_Attach_Handler is
1222 Arg1_X : constant Node_Id := Expression (Arg1);
1223 Handler_Proc, Proc_Scope : Entity_Id;
1228 if Prag_Id = Pragma_Interrupt_Handler then
1229 Check_Restriction (No_Dynamic_Attachment, N);
1232 Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
1233 Proc_Scope := Scope (Handler_Proc);
1235 -- On AAMP only, a pragma Interrupt_Handler is supported for
1236 -- nonprotected parameterless procedures.
1238 if not AAMP_On_Target
1239 or else Prag_Id = Pragma_Attach_Handler
1241 if Ekind (Proc_Scope) /= E_Protected_Type then
1243 ("argument of pragma% must be protected procedure", Arg1);
1246 if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
1247 Error_Pragma ("pragma% must be in protected definition");
1251 if not Is_Library_Level_Entity (Proc_Scope)
1252 or else (AAMP_On_Target
1253 and then not Is_Library_Level_Entity (Handler_Proc))
1256 ("argument for pragma% must be library level entity", Arg1);
1258 end Check_Interrupt_Or_Attach_Handler;
1260 -------------------------------------------
1261 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1262 -------------------------------------------
1264 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1273 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1276 elsif Nkind_In (P, N_Package_Specification,
1281 -- Note: the following tests seem a little peculiar, because
1282 -- they test for bodies, but if we were in the statement part
1283 -- of the body, we would already have hit the handled statement
1284 -- sequence, so the only way we get here is by being in the
1285 -- declarative part of the body.
1287 elsif Nkind_In (P, N_Subprogram_Body,
1298 Error_Pragma ("pragma% is not in declarative part or package spec");
1299 end Check_Is_In_Decl_Part_Or_Package_Spec;
1301 -------------------------
1302 -- Check_No_Identifier --
1303 -------------------------
1305 procedure Check_No_Identifier (Arg : Node_Id) is
1307 if Chars (Arg) /= No_Name then
1308 Error_Pragma_Arg_Ident
1309 ("pragma% does not permit identifier& here", Arg);
1311 end Check_No_Identifier;
1313 --------------------------
1314 -- Check_No_Identifiers --
1315 --------------------------
1317 procedure Check_No_Identifiers is
1320 if Arg_Count > 0 then
1322 while Present (Arg_Node) loop
1323 Check_No_Identifier (Arg_Node);
1327 end Check_No_Identifiers;
1329 -------------------------------
1330 -- Check_Optional_Identifier --
1331 -------------------------------
1333 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1335 if Present (Arg) and then Chars (Arg) /= No_Name then
1336 if Chars (Arg) /= Id then
1337 Error_Msg_Name_1 := Pname;
1338 Error_Msg_Name_2 := Id;
1339 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1343 end Check_Optional_Identifier;
1345 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1347 Name_Buffer (1 .. Id'Length) := Id;
1348 Name_Len := Id'Length;
1349 Check_Optional_Identifier (Arg, Name_Find);
1350 end Check_Optional_Identifier;
1352 --------------------------------------
1353 -- Check_Precondition_Postcondition --
1354 --------------------------------------
1356 procedure Check_Precondition_Postcondition (In_Body : out Boolean) is
1360 procedure Chain_PPC (PO : Node_Id);
1361 -- If PO is a subprogram declaration node (or a generic subprogram
1362 -- declaration node), then the precondition/postcondition applies
1363 -- to this subprogram and the processing for the pragma is completed.
1364 -- Otherwise the pragma is misplaced.
1370 procedure Chain_PPC (PO : Node_Id) is
1374 if not Nkind_In (PO, N_Subprogram_Declaration,
1375 N_Generic_Subprogram_Declaration)
1380 -- Here if we have subprogram or generic subprogram declaration
1382 S := Defining_Unit_Name (Specification (PO));
1384 -- Analyze the pragma unless it appears within a package spec,
1385 -- which is the case where we delay the analysis of the PPC until
1386 -- the end of the package declarations (for details, see
1387 -- Analyze_Package_Specification.Analyze_PPCs).
1389 if not Is_Package_Or_Generic_Package (Scope (S)) then
1390 Analyze_PPC_In_Decl_Part (N, S);
1393 -- Chain spec PPC pragma to list for subprogram
1395 Set_Next_Pragma (N, Spec_PPC_List (S));
1396 Set_Spec_PPC_List (S, N);
1398 -- Return indicating spec case
1404 -- Start of processing for Check_Precondition_Postcondition
1407 if not Is_List_Member (N) then
1411 -- Record whether pragma is enabled
1413 Set_PPC_Enabled (N, Check_Enabled (Pname));
1415 -- If we are within an inlined body, the legality of the pragma
1416 -- has been checked already.
1418 if In_Inlined_Body then
1423 -- Search prior declarations
1426 while Present (Prev (P)) loop
1429 -- If the previous node is a generic subprogram, do not go to to
1430 -- the original node, which is the unanalyzed tree: we need to
1431 -- attach the pre/postconditions to the analyzed version at this
1432 -- point. They get propagated to the original tree when analyzing
1433 -- the corresponding body.
1435 if Nkind (P) not in N_Generic_Declaration then
1436 PO := Original_Node (P);
1441 -- Skip past prior pragma
1443 if Nkind (PO) = N_Pragma then
1446 -- Skip stuff not coming from source
1448 elsif not Comes_From_Source (PO) then
1451 -- Only remaining possibility is subprogram declaration
1459 -- If we fall through loop, pragma is at start of list, so see if it
1460 -- is at the start of declarations of a subprogram body.
1462 if Nkind (Parent (N)) = N_Subprogram_Body
1463 and then List_Containing (N) = Declarations (Parent (N))
1465 if Operating_Mode /= Generate_Code
1466 or else Inside_A_Generic
1469 -- Analyze expression in pragma, for correctness
1470 -- and for ASIS use.
1472 Preanalyze_Spec_Expression
1473 (Get_Pragma_Arg (Arg1), Standard_Boolean);
1479 -- See if it is in the pragmas after a library level subprogram
1481 elsif Nkind (Parent (N)) = N_Compilation_Unit_Aux then
1482 Chain_PPC (Unit (Parent (Parent (N))));
1486 -- If we fall through, pragma was misplaced
1489 end Check_Precondition_Postcondition;
1491 -----------------------------
1492 -- Check_Static_Constraint --
1493 -----------------------------
1495 -- Note: for convenience in writing this procedure, in addition to
1496 -- the officially (i.e. by spec) allowed argument which is always a
1497 -- constraint, it also allows ranges and discriminant associations.
1498 -- Above is not clear ???
1500 procedure Check_Static_Constraint (Constr : Node_Id) is
1502 procedure Require_Static (E : Node_Id);
1503 -- Require given expression to be static expression
1505 --------------------
1506 -- Require_Static --
1507 --------------------
1509 procedure Require_Static (E : Node_Id) is
1511 if not Is_OK_Static_Expression (E) then
1512 Flag_Non_Static_Expr
1513 ("non-static constraint not allowed in Unchecked_Union!", E);
1518 -- Start of processing for Check_Static_Constraint
1521 case Nkind (Constr) is
1522 when N_Discriminant_Association =>
1523 Require_Static (Expression (Constr));
1526 Require_Static (Low_Bound (Constr));
1527 Require_Static (High_Bound (Constr));
1529 when N_Attribute_Reference =>
1530 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1531 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1533 when N_Range_Constraint =>
1534 Check_Static_Constraint (Range_Expression (Constr));
1536 when N_Index_Or_Discriminant_Constraint =>
1540 IDC := First (Constraints (Constr));
1541 while Present (IDC) loop
1542 Check_Static_Constraint (IDC);
1550 end Check_Static_Constraint;
1552 --------------------------------------
1553 -- Check_Valid_Configuration_Pragma --
1554 --------------------------------------
1556 -- A configuration pragma must appear in the context clause of a
1557 -- compilation unit, and only other pragmas may precede it. Note that
1558 -- the test also allows use in a configuration pragma file.
1560 procedure Check_Valid_Configuration_Pragma is
1562 if not Is_Configuration_Pragma then
1563 Error_Pragma ("incorrect placement for configuration pragma%");
1565 end Check_Valid_Configuration_Pragma;
1567 -------------------------------------
1568 -- Check_Valid_Library_Unit_Pragma --
1569 -------------------------------------
1571 procedure Check_Valid_Library_Unit_Pragma is
1573 Parent_Node : Node_Id;
1574 Unit_Name : Entity_Id;
1575 Unit_Kind : Node_Kind;
1576 Unit_Node : Node_Id;
1577 Sindex : Source_File_Index;
1580 if not Is_List_Member (N) then
1584 Plist := List_Containing (N);
1585 Parent_Node := Parent (Plist);
1587 if Parent_Node = Empty then
1590 -- Case of pragma appearing after a compilation unit. In this case
1591 -- it must have an argument with the corresponding name and must
1592 -- be part of the following pragmas of its parent.
1594 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1595 if Plist /= Pragmas_After (Parent_Node) then
1598 elsif Arg_Count = 0 then
1600 ("argument required if outside compilation unit");
1603 Check_No_Identifiers;
1604 Check_Arg_Count (1);
1605 Unit_Node := Unit (Parent (Parent_Node));
1606 Unit_Kind := Nkind (Unit_Node);
1608 Analyze (Expression (Arg1));
1610 if Unit_Kind = N_Generic_Subprogram_Declaration
1611 or else Unit_Kind = N_Subprogram_Declaration
1613 Unit_Name := Defining_Entity (Unit_Node);
1615 elsif Unit_Kind in N_Generic_Instantiation then
1616 Unit_Name := Defining_Entity (Unit_Node);
1619 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1622 if Chars (Unit_Name) /=
1623 Chars (Entity (Expression (Arg1)))
1626 ("pragma% argument is not current unit name", Arg1);
1629 if Ekind (Unit_Name) = E_Package
1630 and then Present (Renamed_Entity (Unit_Name))
1632 Error_Pragma ("pragma% not allowed for renamed package");
1636 -- Pragma appears other than after a compilation unit
1639 -- Here we check for the generic instantiation case and also
1640 -- for the case of processing a generic formal package. We
1641 -- detect these cases by noting that the Sloc on the node
1642 -- does not belong to the current compilation unit.
1644 Sindex := Source_Index (Current_Sem_Unit);
1646 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1647 Rewrite (N, Make_Null_Statement (Loc));
1650 -- If before first declaration, the pragma applies to the
1651 -- enclosing unit, and the name if present must be this name.
1653 elsif Is_Before_First_Decl (N, Plist) then
1654 Unit_Node := Unit_Declaration_Node (Current_Scope);
1655 Unit_Kind := Nkind (Unit_Node);
1657 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1660 elsif Unit_Kind = N_Subprogram_Body
1661 and then not Acts_As_Spec (Unit_Node)
1665 elsif Nkind (Parent_Node) = N_Package_Body then
1668 elsif Nkind (Parent_Node) = N_Package_Specification
1669 and then Plist = Private_Declarations (Parent_Node)
1673 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1674 or else Nkind (Parent_Node) =
1675 N_Generic_Subprogram_Declaration)
1676 and then Plist = Generic_Formal_Declarations (Parent_Node)
1680 elsif Arg_Count > 0 then
1681 Analyze (Expression (Arg1));
1683 if Entity (Expression (Arg1)) /= Current_Scope then
1685 ("name in pragma% must be enclosing unit", Arg1);
1688 -- It is legal to have no argument in this context
1694 -- Error if not before first declaration. This is because a
1695 -- library unit pragma argument must be the name of a library
1696 -- unit (RM 10.1.5(7)), but the only names permitted in this
1697 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1698 -- generic subprogram declarations or generic instantiations.
1702 ("pragma% misplaced, must be before first declaration");
1706 end Check_Valid_Library_Unit_Pragma;
1712 procedure Check_Variant (Variant : Node_Id) is
1713 Clist : constant Node_Id := Component_List (Variant);
1717 if not Is_Non_Empty_List (Component_Items (Clist)) then
1719 ("Unchecked_Union may not have empty component list",
1724 Comp := First (Component_Items (Clist));
1725 while Present (Comp) loop
1726 Check_Component (Comp);
1735 procedure Error_Pragma (Msg : String) is
1737 Error_Msg_Name_1 := Pname;
1738 Error_Msg_N (Msg, N);
1742 ----------------------
1743 -- Error_Pragma_Arg --
1744 ----------------------
1746 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1748 Error_Msg_Name_1 := Pname;
1749 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1751 end Error_Pragma_Arg;
1753 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1755 Error_Msg_Name_1 := Pname;
1756 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1757 Error_Pragma_Arg (Msg2, Arg);
1758 end Error_Pragma_Arg;
1760 ----------------------------
1761 -- Error_Pragma_Arg_Ident --
1762 ----------------------------
1764 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1766 Error_Msg_Name_1 := Pname;
1767 Error_Msg_N (Msg, Arg);
1769 end Error_Pragma_Arg_Ident;
1771 ----------------------
1772 -- Error_Pragma_Ref --
1773 ----------------------
1775 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id) is
1777 Error_Msg_Name_1 := Pname;
1778 Error_Msg_Sloc := Sloc (Ref);
1779 Error_Msg_NE (Msg, N, Ref);
1781 end Error_Pragma_Ref;
1783 ------------------------
1784 -- Find_Lib_Unit_Name --
1785 ------------------------
1787 function Find_Lib_Unit_Name return Entity_Id is
1789 -- Return inner compilation unit entity, for case of nested
1790 -- categorization pragmas. This happens in generic unit.
1792 if Nkind (Parent (N)) = N_Package_Specification
1793 and then Defining_Entity (Parent (N)) /= Current_Scope
1795 return Defining_Entity (Parent (N));
1797 return Current_Scope;
1799 end Find_Lib_Unit_Name;
1801 ----------------------------
1802 -- Find_Program_Unit_Name --
1803 ----------------------------
1805 procedure Find_Program_Unit_Name (Id : Node_Id) is
1806 Unit_Name : Entity_Id;
1807 Unit_Kind : Node_Kind;
1808 P : constant Node_Id := Parent (N);
1811 if Nkind (P) = N_Compilation_Unit then
1812 Unit_Kind := Nkind (Unit (P));
1814 if Unit_Kind = N_Subprogram_Declaration
1815 or else Unit_Kind = N_Package_Declaration
1816 or else Unit_Kind in N_Generic_Declaration
1818 Unit_Name := Defining_Entity (Unit (P));
1820 if Chars (Id) = Chars (Unit_Name) then
1821 Set_Entity (Id, Unit_Name);
1822 Set_Etype (Id, Etype (Unit_Name));
1824 Set_Etype (Id, Any_Type);
1826 ("cannot find program unit referenced by pragma%");
1830 Set_Etype (Id, Any_Type);
1831 Error_Pragma ("pragma% inapplicable to this unit");
1837 end Find_Program_Unit_Name;
1839 -----------------------------------------
1840 -- Find_Unique_Parameterless_Procedure --
1841 -----------------------------------------
1843 function Find_Unique_Parameterless_Procedure
1845 Arg : Node_Id) return Entity_Id
1847 Proc : Entity_Id := Empty;
1850 -- The body of this procedure needs some comments ???
1852 if not Is_Entity_Name (Name) then
1854 ("argument of pragma% must be entity name", Arg);
1856 elsif not Is_Overloaded (Name) then
1857 Proc := Entity (Name);
1859 if Ekind (Proc) /= E_Procedure
1860 or else Present (First_Formal (Proc)) then
1862 ("argument of pragma% must be parameterless procedure", Arg);
1867 Found : Boolean := False;
1869 Index : Interp_Index;
1872 Get_First_Interp (Name, Index, It);
1873 while Present (It.Nam) loop
1876 if Ekind (Proc) = E_Procedure
1877 and then No (First_Formal (Proc))
1881 Set_Entity (Name, Proc);
1882 Set_Is_Overloaded (Name, False);
1885 ("ambiguous handler name for pragma% ", Arg);
1889 Get_Next_Interp (Index, It);
1894 ("argument of pragma% must be parameterless procedure",
1897 Proc := Entity (Name);
1903 end Find_Unique_Parameterless_Procedure;
1905 -------------------------
1906 -- Gather_Associations --
1907 -------------------------
1909 procedure Gather_Associations
1911 Args : out Args_List)
1916 -- Initialize all parameters to Empty
1918 for J in Args'Range loop
1922 -- That's all we have to do if there are no argument associations
1924 if No (Pragma_Argument_Associations (N)) then
1928 -- Otherwise first deal with any positional parameters present
1930 Arg := First (Pragma_Argument_Associations (N));
1931 for Index in Args'Range loop
1932 exit when No (Arg) or else Chars (Arg) /= No_Name;
1933 Args (Index) := Expression (Arg);
1937 -- Positional parameters all processed, if any left, then we
1938 -- have too many positional parameters.
1940 if Present (Arg) and then Chars (Arg) = No_Name then
1942 ("too many positional associations for pragma%", Arg);
1945 -- Process named parameters if any are present
1947 while Present (Arg) loop
1948 if Chars (Arg) = No_Name then
1950 ("positional association cannot follow named association",
1954 for Index in Names'Range loop
1955 if Names (Index) = Chars (Arg) then
1956 if Present (Args (Index)) then
1958 ("duplicate argument association for pragma%", Arg);
1960 Args (Index) := Expression (Arg);
1965 if Index = Names'Last then
1966 Error_Msg_Name_1 := Pname;
1967 Error_Msg_N ("pragma% does not allow & argument", Arg);
1969 -- Check for possible misspelling
1971 for Index1 in Names'Range loop
1972 if Is_Bad_Spelling_Of
1973 (Chars (Arg), Names (Index1))
1975 Error_Msg_Name_1 := Names (Index1);
1976 Error_Msg_N -- CODEFIX
1977 ("\possible misspelling of%", Arg);
1989 end Gather_Associations;
1995 procedure GNAT_Pragma is
1997 Check_Restriction (No_Implementation_Pragmas, N);
2000 --------------------------
2001 -- Is_Before_First_Decl --
2002 --------------------------
2004 function Is_Before_First_Decl
2005 (Pragma_Node : Node_Id;
2006 Decls : List_Id) return Boolean
2008 Item : Node_Id := First (Decls);
2011 -- Only other pragmas can come before this pragma
2014 if No (Item) or else Nkind (Item) /= N_Pragma then
2017 elsif Item = Pragma_Node then
2023 end Is_Before_First_Decl;
2025 -----------------------------
2026 -- Is_Configuration_Pragma --
2027 -----------------------------
2029 -- A configuration pragma must appear in the context clause of a
2030 -- compilation unit, and only other pragmas may precede it. Note that
2031 -- the test below also permits use in a configuration pragma file.
2033 function Is_Configuration_Pragma return Boolean is
2034 Lis : constant List_Id := List_Containing (N);
2035 Par : constant Node_Id := Parent (N);
2039 -- If no parent, then we are in the configuration pragma file,
2040 -- so the placement is definitely appropriate.
2045 -- Otherwise we must be in the context clause of a compilation unit
2046 -- and the only thing allowed before us in the context list is more
2047 -- configuration pragmas.
2049 elsif Nkind (Par) = N_Compilation_Unit
2050 and then Context_Items (Par) = Lis
2057 elsif Nkind (Prg) /= N_Pragma then
2067 end Is_Configuration_Pragma;
2069 --------------------------
2070 -- Is_In_Context_Clause --
2071 --------------------------
2073 function Is_In_Context_Clause return Boolean is
2075 Parent_Node : Node_Id;
2078 if not Is_List_Member (N) then
2082 Plist := List_Containing (N);
2083 Parent_Node := Parent (Plist);
2085 if Parent_Node = Empty
2086 or else Nkind (Parent_Node) /= N_Compilation_Unit
2087 or else Context_Items (Parent_Node) /= Plist
2094 end Is_In_Context_Clause;
2096 ---------------------------------
2097 -- Is_Static_String_Expression --
2098 ---------------------------------
2100 function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
2101 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
2104 Analyze_And_Resolve (Argx);
2105 return Is_OK_Static_Expression (Argx)
2106 and then Nkind (Argx) = N_String_Literal;
2107 end Is_Static_String_Expression;
2109 ----------------------
2110 -- Pragma_Misplaced --
2111 ----------------------
2113 procedure Pragma_Misplaced is
2115 Error_Pragma ("incorrect placement of pragma%");
2116 end Pragma_Misplaced;
2118 ------------------------------------
2119 -- Process Atomic_Shared_Volatile --
2120 ------------------------------------
2122 procedure Process_Atomic_Shared_Volatile is
2129 procedure Set_Atomic (E : Entity_Id);
2130 -- Set given type as atomic, and if no explicit alignment was given,
2131 -- set alignment to unknown, since back end knows what the alignment
2132 -- requirements are for atomic arrays. Note: this step is necessary
2133 -- for derived types.
2139 procedure Set_Atomic (E : Entity_Id) is
2143 if not Has_Alignment_Clause (E) then
2144 Set_Alignment (E, Uint_0);
2148 -- Start of processing for Process_Atomic_Shared_Volatile
2151 Check_Ada_83_Warning;
2152 Check_No_Identifiers;
2153 Check_Arg_Count (1);
2154 Check_Arg_Is_Local_Name (Arg1);
2155 E_Id := Expression (Arg1);
2157 if Etype (E_Id) = Any_Type then
2162 D := Declaration_Node (E);
2166 if Rep_Item_Too_Early (E, N)
2168 Rep_Item_Too_Late (E, N)
2172 Check_First_Subtype (Arg1);
2175 if Prag_Id /= Pragma_Volatile then
2177 Set_Atomic (Underlying_Type (E));
2178 Set_Atomic (Base_Type (E));
2181 -- Attribute belongs on the base type. If the view of the type is
2182 -- currently private, it also belongs on the underlying type.
2184 Set_Is_Volatile (Base_Type (E));
2185 Set_Is_Volatile (Underlying_Type (E));
2187 Set_Treat_As_Volatile (E);
2188 Set_Treat_As_Volatile (Underlying_Type (E));
2190 elsif K = N_Object_Declaration
2191 or else (K = N_Component_Declaration
2192 and then Original_Record_Component (E) = E)
2194 if Rep_Item_Too_Late (E, N) then
2198 if Prag_Id /= Pragma_Volatile then
2201 -- If the object declaration has an explicit initialization, a
2202 -- temporary may have to be created to hold the expression, to
2203 -- ensure that access to the object remain atomic.
2205 if Nkind (Parent (E)) = N_Object_Declaration
2206 and then Present (Expression (Parent (E)))
2208 Set_Has_Delayed_Freeze (E);
2211 -- An interesting improvement here. If an object of type X is
2212 -- declared atomic, and the type X is not atomic, that's a
2213 -- pity, since it may not have appropriate alignment etc. We
2214 -- can rescue this in the special case where the object and
2215 -- type are in the same unit by just setting the type as
2216 -- atomic, so that the back end will process it as atomic.
2218 Utyp := Underlying_Type (Etype (E));
2221 and then Sloc (E) > No_Location
2222 and then Sloc (Utyp) > No_Location
2224 Get_Source_File_Index (Sloc (E)) =
2225 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
2227 Set_Is_Atomic (Underlying_Type (Etype (E)));
2231 Set_Is_Volatile (E);
2232 Set_Treat_As_Volatile (E);
2236 ("inappropriate entity for pragma%", Arg1);
2238 end Process_Atomic_Shared_Volatile;
2240 -------------------------------------------
2241 -- Process_Compile_Time_Warning_Or_Error --
2242 -------------------------------------------
2244 procedure Process_Compile_Time_Warning_Or_Error is
2245 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
2248 Check_Arg_Count (2);
2249 Check_No_Identifiers;
2250 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
2251 Analyze_And_Resolve (Arg1x, Standard_Boolean);
2253 if Compile_Time_Known_Value (Arg1x) then
2254 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
2256 Str : constant String_Id :=
2257 Strval (Get_Pragma_Arg (Arg2));
2258 Len : constant Int := String_Length (Str);
2263 Cent : constant Entity_Id :=
2264 Cunit_Entity (Current_Sem_Unit);
2266 Force : constant Boolean :=
2267 Prag_Id = Pragma_Compile_Time_Warning
2269 Is_Spec_Name (Unit_Name (Current_Sem_Unit))
2270 and then (Ekind (Cent) /= E_Package
2271 or else not In_Private_Part (Cent));
2272 -- Set True if this is the warning case, and we are in the
2273 -- visible part of a package spec, or in a subprogram spec,
2274 -- in which case we want to force the client to see the
2275 -- warning, even though it is not in the main unit.
2278 -- Loop through segments of message separated by line feeds.
2279 -- We output these segments as separate messages with
2280 -- continuation marks for all but the first.
2285 Error_Msg_Strlen := 0;
2287 -- Loop to copy characters from argument to error message
2291 exit when Ptr > Len;
2292 CC := Get_String_Char (Str, Ptr);
2295 -- Ignore wide chars ??? else store character
2297 if In_Character_Range (CC) then
2298 C := Get_Character (CC);
2299 exit when C = ASCII.LF;
2300 Error_Msg_Strlen := Error_Msg_Strlen + 1;
2301 Error_Msg_String (Error_Msg_Strlen) := C;
2305 -- Here with one line ready to go
2307 Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning;
2309 -- If this is a warning in a spec, then we want clients
2310 -- to see the warning, so mark the message with the
2311 -- special sequence !! to force the warning. In the case
2312 -- of a package spec, we do not force this if we are in
2313 -- the private part of the spec.
2316 if Cont = False then
2317 Error_Msg_N ("<~!!", Arg1);
2320 Error_Msg_N ("\<~!!", Arg1);
2323 -- Error, rather than warning, or in a body, so we do not
2324 -- need to force visibility for client (error will be
2325 -- output in any case, and this is the situation in which
2326 -- we do not want a client to get a warning, since the
2327 -- warning is in the body or the spec private part.
2330 if Cont = False then
2331 Error_Msg_N ("<~", Arg1);
2334 Error_Msg_N ("\<~", Arg1);
2338 exit when Ptr > Len;
2343 end Process_Compile_Time_Warning_Or_Error;
2345 ------------------------
2346 -- Process_Convention --
2347 ------------------------
2349 procedure Process_Convention
2350 (C : out Convention_Id;
2356 Comp_Unit : Unit_Number_Type;
2358 procedure Set_Convention_From_Pragma (E : Entity_Id);
2359 -- Set convention in entity E, and also flag that the entity has a
2360 -- convention pragma. If entity is for a private or incomplete type,
2361 -- also set convention and flag on underlying type. This procedure
2362 -- also deals with the special case of C_Pass_By_Copy convention.
2364 --------------------------------
2365 -- Set_Convention_From_Pragma --
2366 --------------------------------
2368 procedure Set_Convention_From_Pragma (E : Entity_Id) is
2370 -- Ada 2005 (AI-430): Check invalid attempt to change convention
2371 -- for an overridden dispatching operation. Technically this is
2372 -- an amendment and should only be done in Ada 2005 mode. However,
2373 -- this is clearly a mistake, since the problem that is addressed
2374 -- by this AI is that there is a clear gap in the RM!
2376 if Is_Dispatching_Operation (E)
2377 and then Present (Overridden_Operation (E))
2378 and then C /= Convention (Overridden_Operation (E))
2381 ("cannot change convention for " &
2382 "overridden dispatching operation",
2386 -- Set the convention
2388 Set_Convention (E, C);
2389 Set_Has_Convention_Pragma (E);
2391 if Is_Incomplete_Or_Private_Type (E) then
2392 Set_Convention (Underlying_Type (E), C);
2393 Set_Has_Convention_Pragma (Underlying_Type (E), True);
2396 -- A class-wide type should inherit the convention of the specific
2397 -- root type (although this isn't specified clearly by the RM).
2399 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
2400 Set_Convention (Class_Wide_Type (E), C);
2403 -- If the entity is a record type, then check for special case of
2404 -- C_Pass_By_Copy, which is treated the same as C except that the
2405 -- special record flag is set. This convention is only permitted
2406 -- on record types (see AI95-00131).
2408 if Cname = Name_C_Pass_By_Copy then
2409 if Is_Record_Type (E) then
2410 Set_C_Pass_By_Copy (Base_Type (E));
2411 elsif Is_Incomplete_Or_Private_Type (E)
2412 and then Is_Record_Type (Underlying_Type (E))
2414 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
2417 ("C_Pass_By_Copy convention allowed only for record type",
2422 -- If the entity is a derived boolean type, check for the special
2423 -- case of convention C, C++, or Fortran, where we consider any
2424 -- nonzero value to represent true.
2426 if Is_Discrete_Type (E)
2427 and then Root_Type (Etype (E)) = Standard_Boolean
2433 C = Convention_Fortran)
2435 Set_Nonzero_Is_True (Base_Type (E));
2437 end Set_Convention_From_Pragma;
2439 -- Start of processing for Process_Convention
2442 Check_At_Least_N_Arguments (2);
2443 Check_Optional_Identifier (Arg1, Name_Convention);
2444 Check_Arg_Is_Identifier (Arg1);
2445 Cname := Chars (Expression (Arg1));
2447 -- C_Pass_By_Copy is treated as a synonym for convention C (this is
2448 -- tested again below to set the critical flag).
2449 if Cname = Name_C_Pass_By_Copy then
2452 -- Otherwise we must have something in the standard convention list
2454 elsif Is_Convention_Name (Cname) then
2455 C := Get_Convention_Id (Chars (Expression (Arg1)));
2457 -- In DEC VMS, it seems that there is an undocumented feature that
2458 -- any unrecognized convention is treated as the default, which for
2459 -- us is convention C. It does not seem so terrible to do this
2460 -- unconditionally, silently in the VMS case, and with a warning
2461 -- in the non-VMS case.
2464 if Warn_On_Export_Import and not OpenVMS_On_Target then
2466 ("?unrecognized convention name, C assumed",
2473 Check_Optional_Identifier (Arg2, Name_Entity);
2474 Check_Arg_Is_Local_Name (Arg2);
2476 Id := Expression (Arg2);
2479 if not Is_Entity_Name (Id) then
2480 Error_Pragma_Arg ("entity name required", Arg2);
2485 -- Go to renamed subprogram if present, since convention applies to
2486 -- the actual renamed entity, not to the renaming entity. If the
2487 -- subprogram is inherited, go to parent subprogram.
2489 if Is_Subprogram (E)
2490 and then Present (Alias (E))
2492 if Nkind (Parent (Declaration_Node (E))) =
2493 N_Subprogram_Renaming_Declaration
2495 if Scope (E) /= Scope (Alias (E)) then
2497 ("cannot apply pragma% to non-local entity&#", E);
2502 elsif Nkind_In (Parent (E), N_Full_Type_Declaration,
2503 N_Private_Extension_Declaration)
2504 and then Scope (E) = Scope (Alias (E))
2510 -- Check that we are not applying this to a specless body
2512 if Is_Subprogram (E)
2513 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2516 ("pragma% requires separate spec and must come before body");
2519 -- Check that we are not applying this to a named constant
2521 if Ekind (E) = E_Named_Integer
2523 Ekind (E) = E_Named_Real
2525 Error_Msg_Name_1 := Pname;
2527 ("cannot apply pragma% to named constant!",
2528 Get_Pragma_Arg (Arg2));
2530 ("\supply appropriate type for&!", Arg2);
2533 if Ekind (E) = E_Enumeration_Literal then
2534 Error_Pragma ("enumeration literal not allowed for pragma%");
2537 -- Check for rep item appearing too early or too late
2539 if Etype (E) = Any_Type
2540 or else Rep_Item_Too_Early (E, N)
2544 E := Underlying_Type (E);
2547 if Rep_Item_Too_Late (E, N) then
2551 if Has_Convention_Pragma (E) then
2553 ("at most one Convention/Export/Import pragma is allowed", Arg2);
2555 elsif Convention (E) = Convention_Protected
2556 or else Ekind (Scope (E)) = E_Protected_Type
2559 ("a protected operation cannot be given a different convention",
2563 -- For Intrinsic, a subprogram is required
2565 if C = Convention_Intrinsic
2566 and then not Is_Subprogram (E)
2567 and then not Is_Generic_Subprogram (E)
2570 ("second argument of pragma% must be a subprogram", Arg2);
2573 -- For Stdcall, a subprogram, variable or subprogram type is required
2575 if C = Convention_Stdcall
2576 and then not Is_Subprogram (E)
2577 and then not Is_Generic_Subprogram (E)
2578 and then Ekind (E) /= E_Variable
2581 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2584 ("second argument of pragma% must be subprogram (type)",
2588 if not Is_Subprogram (E)
2589 and then not Is_Generic_Subprogram (E)
2591 Set_Convention_From_Pragma (E);
2595 Check_First_Subtype (Arg2);
2596 Set_Convention_From_Pragma (Base_Type (E));
2598 -- For subprograms, we must set the convention on the
2599 -- internally generated directly designated type as well.
2601 if Ekind (E) = E_Access_Subprogram_Type then
2602 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2606 -- For the subprogram case, set proper convention for all homonyms
2607 -- in same scope and the same declarative part, i.e. the same
2608 -- compilation unit.
2611 Comp_Unit := Get_Source_Unit (E);
2612 Set_Convention_From_Pragma (E);
2614 -- Treat a pragma Import as an implicit body, for GPS use
2616 if Prag_Id = Pragma_Import then
2617 Generate_Reference (E, Id, 'b');
2623 exit when No (E1) or else Scope (E1) /= Current_Scope;
2625 -- Do not set the pragma on inherited operations or on formal
2628 if Comes_From_Source (E1)
2629 and then Comp_Unit = Get_Source_Unit (E1)
2630 and then not Is_Formal_Subprogram (E1)
2631 and then Nkind (Original_Node (Parent (E1))) /=
2632 N_Full_Type_Declaration
2634 if Present (Alias (E1))
2635 and then Scope (E1) /= Scope (Alias (E1))
2638 ("cannot apply pragma% to non-local entity& declared#",
2642 Set_Convention_From_Pragma (E1);
2644 if Prag_Id = Pragma_Import then
2645 Generate_Reference (E, Id, 'b');
2650 end Process_Convention;
2652 -----------------------------------------------------
2653 -- Process_Extended_Import_Export_Exception_Pragma --
2654 -----------------------------------------------------
2656 procedure Process_Extended_Import_Export_Exception_Pragma
2657 (Arg_Internal : Node_Id;
2658 Arg_External : Node_Id;
2666 if not OpenVMS_On_Target then
2668 ("?pragma% ignored (applies only to Open'V'M'S)");
2671 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2672 Def_Id := Entity (Arg_Internal);
2674 if Ekind (Def_Id) /= E_Exception then
2676 ("pragma% must refer to declared exception", Arg_Internal);
2679 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2681 if Present (Arg_Form) then
2682 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2685 if Present (Arg_Form)
2686 and then Chars (Arg_Form) = Name_Ada
2690 Set_Is_VMS_Exception (Def_Id);
2691 Set_Exception_Code (Def_Id, No_Uint);
2694 if Present (Arg_Code) then
2695 if not Is_VMS_Exception (Def_Id) then
2697 ("Code option for pragma% not allowed for Ada case",
2701 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2702 Code_Val := Expr_Value (Arg_Code);
2704 if not UI_Is_In_Int_Range (Code_Val) then
2706 ("Code option for pragma% must be in 32-bit range",
2710 Set_Exception_Code (Def_Id, Code_Val);
2713 end Process_Extended_Import_Export_Exception_Pragma;
2715 -------------------------------------------------
2716 -- Process_Extended_Import_Export_Internal_Arg --
2717 -------------------------------------------------
2719 procedure Process_Extended_Import_Export_Internal_Arg
2720 (Arg_Internal : Node_Id := Empty)
2723 if No (Arg_Internal) then
2724 Error_Pragma ("Internal parameter required for pragma%");
2727 if Nkind (Arg_Internal) = N_Identifier then
2730 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2731 and then (Prag_Id = Pragma_Import_Function
2733 Prag_Id = Pragma_Export_Function)
2739 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2742 Check_Arg_Is_Local_Name (Arg_Internal);
2743 end Process_Extended_Import_Export_Internal_Arg;
2745 --------------------------------------------------
2746 -- Process_Extended_Import_Export_Object_Pragma --
2747 --------------------------------------------------
2749 procedure Process_Extended_Import_Export_Object_Pragma
2750 (Arg_Internal : Node_Id;
2751 Arg_External : Node_Id;
2757 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2758 Def_Id := Entity (Arg_Internal);
2760 if Ekind (Def_Id) /= E_Constant
2761 and then Ekind (Def_Id) /= E_Variable
2764 ("pragma% must designate an object", Arg_Internal);
2767 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2769 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2772 ("previous Common/Psect_Object applies, pragma % not permitted",
2776 if Rep_Item_Too_Late (Def_Id, N) then
2780 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2782 if Present (Arg_Size) then
2783 Check_Arg_Is_External_Name (Arg_Size);
2786 -- Export_Object case
2788 if Prag_Id = Pragma_Export_Object then
2789 if not Is_Library_Level_Entity (Def_Id) then
2791 ("argument for pragma% must be library level entity",
2795 if Ekind (Current_Scope) = E_Generic_Package then
2796 Error_Pragma ("pragma& cannot appear in a generic unit");
2799 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2801 ("exported object must have compile time known size",
2805 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2806 Error_Msg_N ("?duplicate Export_Object pragma", N);
2808 Set_Exported (Def_Id, Arg_Internal);
2811 -- Import_Object case
2814 if Is_Concurrent_Type (Etype (Def_Id)) then
2816 ("cannot use pragma% for task/protected object",
2820 if Ekind (Def_Id) = E_Constant then
2822 ("cannot import a constant", Arg_Internal);
2825 if Warn_On_Export_Import
2826 and then Has_Discriminants (Etype (Def_Id))
2829 ("imported value must be initialized?", Arg_Internal);
2832 if Warn_On_Export_Import
2833 and then Is_Access_Type (Etype (Def_Id))
2836 ("cannot import object of an access type?", Arg_Internal);
2839 if Warn_On_Export_Import
2840 and then Is_Imported (Def_Id)
2843 ("?duplicate Import_Object pragma", N);
2845 -- Check for explicit initialization present. Note that an
2846 -- initialization generated by the code generator, e.g. for an
2847 -- access type, does not count here.
2849 elsif Present (Expression (Parent (Def_Id)))
2852 (Original_Node (Expression (Parent (Def_Id))))
2854 Error_Msg_Sloc := Sloc (Def_Id);
2856 ("imported entities cannot be initialized (RM B.1(24))",
2857 "\no initialization allowed for & declared#", Arg1);
2859 Set_Imported (Def_Id);
2860 Note_Possible_Modification (Arg_Internal, Sure => False);
2863 end Process_Extended_Import_Export_Object_Pragma;
2865 ------------------------------------------------------
2866 -- Process_Extended_Import_Export_Subprogram_Pragma --
2867 ------------------------------------------------------
2869 procedure Process_Extended_Import_Export_Subprogram_Pragma
2870 (Arg_Internal : Node_Id;
2871 Arg_External : Node_Id;
2872 Arg_Parameter_Types : Node_Id;
2873 Arg_Result_Type : Node_Id := Empty;
2874 Arg_Mechanism : Node_Id;
2875 Arg_Result_Mechanism : Node_Id := Empty;
2876 Arg_First_Optional_Parameter : Node_Id := Empty)
2882 Ambiguous : Boolean;
2886 function Same_Base_Type
2888 Formal : Entity_Id) return Boolean;
2889 -- Determines if Ptype references the type of Formal. Note that only
2890 -- the base types need to match according to the spec. Ptype here is
2891 -- the argument from the pragma, which is either a type name, or an
2892 -- access attribute.
2894 --------------------
2895 -- Same_Base_Type --
2896 --------------------
2898 function Same_Base_Type
2900 Formal : Entity_Id) return Boolean
2902 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2906 -- Case where pragma argument is typ'Access
2908 if Nkind (Ptype) = N_Attribute_Reference
2909 and then Attribute_Name (Ptype) = Name_Access
2911 Pref := Prefix (Ptype);
2914 if not Is_Entity_Name (Pref)
2915 or else Entity (Pref) = Any_Type
2920 -- We have a match if the corresponding argument is of an
2921 -- anonymous access type, and its designated type matches the
2922 -- type of the prefix of the access attribute
2924 return Ekind (Ftyp) = E_Anonymous_Access_Type
2925 and then Base_Type (Entity (Pref)) =
2926 Base_Type (Etype (Designated_Type (Ftyp)));
2928 -- Case where pragma argument is a type name
2933 if not Is_Entity_Name (Ptype)
2934 or else Entity (Ptype) = Any_Type
2939 -- We have a match if the corresponding argument is of the type
2940 -- given in the pragma (comparing base types)
2942 return Base_Type (Entity (Ptype)) = Ftyp;
2946 -- Start of processing for
2947 -- Process_Extended_Import_Export_Subprogram_Pragma
2950 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2954 -- Loop through homonyms (overloadings) of the entity
2956 Hom_Id := Entity (Arg_Internal);
2957 while Present (Hom_Id) loop
2958 Def_Id := Get_Base_Subprogram (Hom_Id);
2960 -- We need a subprogram in the current scope
2962 if not Is_Subprogram (Def_Id)
2963 or else Scope (Def_Id) /= Current_Scope
2970 -- Pragma cannot apply to subprogram body
2972 if Is_Subprogram (Def_Id)
2973 and then Nkind (Parent (Declaration_Node (Def_Id))) =
2977 ("pragma% requires separate spec"
2978 & " and must come before body");
2981 -- Test result type if given, note that the result type
2982 -- parameter can only be present for the function cases.
2984 if Present (Arg_Result_Type)
2985 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2989 elsif Etype (Def_Id) /= Standard_Void_Type
2991 (Pname = Name_Export_Procedure
2993 Pname = Name_Import_Procedure)
2997 -- Test parameter types if given. Note that this parameter
2998 -- has not been analyzed (and must not be, since it is
2999 -- semantic nonsense), so we get it as the parser left it.
3001 elsif Present (Arg_Parameter_Types) then
3002 Check_Matching_Types : declare
3007 Formal := First_Formal (Def_Id);
3009 if Nkind (Arg_Parameter_Types) = N_Null then
3010 if Present (Formal) then
3014 -- A list of one type, e.g. (List) is parsed as
3015 -- a parenthesized expression.
3017 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
3018 and then Paren_Count (Arg_Parameter_Types) = 1
3021 or else Present (Next_Formal (Formal))
3026 Same_Base_Type (Arg_Parameter_Types, Formal);
3029 -- A list of more than one type is parsed as a aggregate
3031 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
3032 and then Paren_Count (Arg_Parameter_Types) = 0
3034 Ptype := First (Expressions (Arg_Parameter_Types));
3035 while Present (Ptype) or else Present (Formal) loop
3038 or else not Same_Base_Type (Ptype, Formal)
3043 Next_Formal (Formal);
3048 -- Anything else is of the wrong form
3052 ("wrong form for Parameter_Types parameter",
3053 Arg_Parameter_Types);
3055 end Check_Matching_Types;
3058 -- Match is now False if the entry we found did not match
3059 -- either a supplied Parameter_Types or Result_Types argument
3065 -- Ambiguous case, the flag Ambiguous shows if we already
3066 -- detected this and output the initial messages.
3069 if not Ambiguous then
3071 Error_Msg_Name_1 := Pname;
3073 ("pragma% does not uniquely identify subprogram!",
3075 Error_Msg_Sloc := Sloc (Ent);
3076 Error_Msg_N ("matching subprogram #!", N);
3080 Error_Msg_Sloc := Sloc (Def_Id);
3081 Error_Msg_N ("matching subprogram #!", N);
3086 Hom_Id := Homonym (Hom_Id);
3089 -- See if we found an entry
3092 if not Ambiguous then
3093 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
3095 ("pragma% cannot be given for generic subprogram");
3098 ("pragma% does not identify local subprogram");
3105 -- Import pragmas must be for imported entities
3107 if Prag_Id = Pragma_Import_Function
3109 Prag_Id = Pragma_Import_Procedure
3111 Prag_Id = Pragma_Import_Valued_Procedure
3113 if not Is_Imported (Ent) then
3114 Error_Pragma -- CODEFIX???
3115 ("pragma Import or Interface must precede pragma%");
3118 -- Here we have the Export case which can set the entity as exported
3120 -- But does not do so if the specified external name is null, since
3121 -- that is taken as a signal in DEC Ada 83 (with which we want to be
3122 -- compatible) to request no external name.
3124 elsif Nkind (Arg_External) = N_String_Literal
3125 and then String_Length (Strval (Arg_External)) = 0
3129 -- In all other cases, set entity as exported
3132 Set_Exported (Ent, Arg_Internal);
3135 -- Special processing for Valued_Procedure cases
3137 if Prag_Id = Pragma_Import_Valued_Procedure
3139 Prag_Id = Pragma_Export_Valued_Procedure
3141 Formal := First_Formal (Ent);
3144 Error_Pragma ("at least one parameter required for pragma%");
3146 elsif Ekind (Formal) /= E_Out_Parameter then
3147 Error_Pragma ("first parameter must have mode out for pragma%");
3150 Set_Is_Valued_Procedure (Ent);
3154 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
3156 -- Process Result_Mechanism argument if present. We have already
3157 -- checked that this is only allowed for the function case.
3159 if Present (Arg_Result_Mechanism) then
3160 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
3163 -- Process Mechanism parameter if present. Note that this parameter
3164 -- is not analyzed, and must not be analyzed since it is semantic
3165 -- nonsense, so we get it in exactly as the parser left it.
3167 if Present (Arg_Mechanism) then
3175 -- A single mechanism association without a formal parameter
3176 -- name is parsed as a parenthesized expression. All other
3177 -- cases are parsed as aggregates, so we rewrite the single
3178 -- parameter case as an aggregate for consistency.
3180 if Nkind (Arg_Mechanism) /= N_Aggregate
3181 and then Paren_Count (Arg_Mechanism) = 1
3183 Rewrite (Arg_Mechanism,
3184 Make_Aggregate (Sloc (Arg_Mechanism),
3185 Expressions => New_List (
3186 Relocate_Node (Arg_Mechanism))));
3189 -- Case of only mechanism name given, applies to all formals
3191 if Nkind (Arg_Mechanism) /= N_Aggregate then
3192 Formal := First_Formal (Ent);
3193 while Present (Formal) loop
3194 Set_Mechanism_Value (Formal, Arg_Mechanism);
3195 Next_Formal (Formal);
3198 -- Case of list of mechanism associations given
3201 if Null_Record_Present (Arg_Mechanism) then
3203 ("inappropriate form for Mechanism parameter",
3207 -- Deal with positional ones first
3209 Formal := First_Formal (Ent);
3211 if Present (Expressions (Arg_Mechanism)) then
3212 Mname := First (Expressions (Arg_Mechanism));
3213 while Present (Mname) loop
3216 ("too many mechanism associations", Mname);
3219 Set_Mechanism_Value (Formal, Mname);
3220 Next_Formal (Formal);
3225 -- Deal with named entries
3227 if Present (Component_Associations (Arg_Mechanism)) then
3228 Massoc := First (Component_Associations (Arg_Mechanism));
3229 while Present (Massoc) loop
3230 Choice := First (Choices (Massoc));
3232 if Nkind (Choice) /= N_Identifier
3233 or else Present (Next (Choice))
3236 ("incorrect form for mechanism association",
3240 Formal := First_Formal (Ent);
3244 ("parameter name & not present", Choice);
3247 if Chars (Choice) = Chars (Formal) then
3249 (Formal, Expression (Massoc));
3251 -- Set entity on identifier for ASIS
3253 Set_Entity (Choice, Formal);
3258 Next_Formal (Formal);
3268 -- Process First_Optional_Parameter argument if present. We have
3269 -- already checked that this is only allowed for the Import case.
3271 if Present (Arg_First_Optional_Parameter) then
3272 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
3274 ("first optional parameter must be formal parameter name",
3275 Arg_First_Optional_Parameter);
3278 Formal := First_Formal (Ent);
3282 ("specified formal parameter& not found",
3283 Arg_First_Optional_Parameter);
3286 exit when Chars (Formal) =
3287 Chars (Arg_First_Optional_Parameter);
3289 Next_Formal (Formal);
3292 Set_First_Optional_Parameter (Ent, Formal);
3294 -- Check specified and all remaining formals have right form
3296 while Present (Formal) loop
3297 if Ekind (Formal) /= E_In_Parameter then
3299 ("optional formal& is not of mode in!",
3300 Arg_First_Optional_Parameter, Formal);
3303 Dval := Default_Value (Formal);
3307 ("optional formal& does not have default value!",
3308 Arg_First_Optional_Parameter, Formal);
3310 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
3315 ("default value for optional formal& is non-static!",
3316 Arg_First_Optional_Parameter, Formal);
3320 Set_Is_Optional_Parameter (Formal);
3321 Next_Formal (Formal);
3324 end Process_Extended_Import_Export_Subprogram_Pragma;
3326 --------------------------
3327 -- Process_Generic_List --
3328 --------------------------
3330 procedure Process_Generic_List is
3335 Check_No_Identifiers;
3336 Check_At_Least_N_Arguments (1);
3339 while Present (Arg) loop
3340 Exp := Expression (Arg);
3343 if not Is_Entity_Name (Exp)
3345 (not Is_Generic_Instance (Entity (Exp))
3347 not Is_Generic_Unit (Entity (Exp)))
3350 ("pragma% argument must be name of generic unit/instance",
3356 end Process_Generic_List;
3358 ---------------------------------
3359 -- Process_Import_Or_Interface --
3360 ---------------------------------
3362 procedure Process_Import_Or_Interface is
3368 Process_Convention (C, Def_Id);
3369 Kill_Size_Check_Code (Def_Id);
3370 Note_Possible_Modification (Expression (Arg2), Sure => False);
3372 if Ekind (Def_Id) = E_Variable
3374 Ekind (Def_Id) = E_Constant
3376 -- We do not permit Import to apply to a renaming declaration
3378 if Present (Renamed_Object (Def_Id)) then
3380 ("pragma% not allowed for object renaming", Arg2);
3382 -- User initialization is not allowed for imported object, but
3383 -- the object declaration may contain a default initialization,
3384 -- that will be discarded. Note that an explicit initialization
3385 -- only counts if it comes from source, otherwise it is simply
3386 -- the code generator making an implicit initialization explicit.
3388 elsif Present (Expression (Parent (Def_Id)))
3389 and then Comes_From_Source (Expression (Parent (Def_Id)))
3391 Error_Msg_Sloc := Sloc (Def_Id);
3393 ("no initialization allowed for declaration of& #",
3394 "\imported entities cannot be initialized (RM B.1(24))",
3398 Set_Imported (Def_Id);
3399 Process_Interface_Name (Def_Id, Arg3, Arg4);
3401 -- Note that we do not set Is_Public here. That's because we
3402 -- only want to set it if there is no address clause, and we
3403 -- don't know that yet, so we delay that processing till
3406 -- pragma Import completes deferred constants
3408 if Ekind (Def_Id) = E_Constant then
3409 Set_Has_Completion (Def_Id);
3412 -- It is not possible to import a constant of an unconstrained
3413 -- array type (e.g. string) because there is no simple way to
3414 -- write a meaningful subtype for it.
3416 if Is_Array_Type (Etype (Def_Id))
3417 and then not Is_Constrained (Etype (Def_Id))
3420 ("imported constant& must have a constrained subtype",
3425 elsif Is_Subprogram (Def_Id)
3426 or else Is_Generic_Subprogram (Def_Id)
3428 -- If the name is overloaded, pragma applies to all of the
3429 -- denoted entities in the same declarative part.
3432 while Present (Hom_Id) loop
3433 Def_Id := Get_Base_Subprogram (Hom_Id);
3435 -- Ignore inherited subprograms because the pragma will
3436 -- apply to the parent operation, which is the one called.
3438 if Is_Overloadable (Def_Id)
3439 and then Present (Alias (Def_Id))
3443 -- If it is not a subprogram, it must be in an outer scope and
3444 -- pragma does not apply.
3446 elsif not Is_Subprogram (Def_Id)
3447 and then not Is_Generic_Subprogram (Def_Id)
3451 -- Verify that the homonym is in the same declarative part (not
3452 -- just the same scope).
3454 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
3455 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
3460 Set_Imported (Def_Id);
3462 if Is_Subprogram (Def_Id)
3463 and then Is_Abstract_Subprogram (Def_Id)
3465 Error_Msg_Sloc := Sloc (Def_Id);
3467 ("cannot import abstract subprogram& declared#",
3471 -- Special processing for Convention_Intrinsic
3473 if C = Convention_Intrinsic then
3475 -- Link_Name argument not allowed for intrinsic
3478 and then Chars (Arg3) = Name_Link_Name
3483 if Present (Arg4) then
3485 ("Link_Name argument not allowed for " &
3490 Set_Is_Intrinsic_Subprogram (Def_Id);
3492 -- If no external name is present, then check that this
3493 -- is a valid intrinsic subprogram. If an external name
3494 -- is present, then this is handled by the back end.
3497 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
3501 -- All interfaced procedures need an external symbol created
3502 -- for them since they are always referenced from another
3505 Set_Is_Public (Def_Id);
3507 -- Verify that the subprogram does not have a completion
3508 -- through a renaming declaration. For other completions the
3509 -- pragma appears as a too late representation.
3512 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3516 and then Nkind (Decl) = N_Subprogram_Declaration
3517 and then Present (Corresponding_Body (Decl))
3518 and then Nkind (Unit_Declaration_Node
3519 (Corresponding_Body (Decl))) =
3520 N_Subprogram_Renaming_Declaration
3522 Error_Msg_Sloc := Sloc (Def_Id);
3524 ("cannot import&, renaming already provided for " &
3525 "declaration #", N, Def_Id);
3529 Set_Has_Completion (Def_Id);
3530 Process_Interface_Name (Def_Id, Arg3, Arg4);
3533 if Is_Compilation_Unit (Hom_Id) then
3535 -- Its possible homonyms are not affected by the pragma.
3536 -- Such homonyms might be present in the context of other
3537 -- units being compiled.
3542 Hom_Id := Homonym (Hom_Id);
3546 -- When the convention is Java or CIL, we also allow Import to be
3547 -- given for packages, generic packages, exceptions, record
3548 -- components, and access to subprograms.
3550 elsif (C = Convention_Java or else C = Convention_CIL)
3552 (Is_Package_Or_Generic_Package (Def_Id)
3553 or else Ekind (Def_Id) = E_Exception
3554 or else Ekind (Def_Id) = E_Access_Subprogram_Type
3555 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3557 Set_Imported (Def_Id);
3558 Set_Is_Public (Def_Id);
3559 Process_Interface_Name (Def_Id, Arg3, Arg4);
3561 -- Import a CPP class
3563 elsif Is_Record_Type (Def_Id)
3564 and then C = Convention_CPP
3566 -- Types treated as CPP classes are treated as limited, but we
3567 -- don't require them to be declared this way. A warning is
3568 -- issued to encourage the user to declare them as limited.
3569 -- This is not an error, for compatibility reasons, because
3570 -- these types have been supported this way for some time.
3572 if not Is_Limited_Type (Def_Id) then
3574 ("imported 'C'P'P type should be " &
3575 "explicitly declared limited?",
3576 Get_Pragma_Arg (Arg2));
3578 ("\type will be considered limited",
3579 Get_Pragma_Arg (Arg2));
3582 Set_Is_CPP_Class (Def_Id);
3583 Set_Is_Limited_Record (Def_Id);
3585 -- Imported CPP types must not have discriminants (because C++
3586 -- classes do not have discriminants).
3588 if Has_Discriminants (Def_Id) then
3590 ("imported 'C'P'P type cannot have discriminants",
3591 First (Discriminant_Specifications
3592 (Declaration_Node (Def_Id))));
3595 -- Components of imported CPP types must not have default
3596 -- expressions because the constructor (if any) is on the
3600 Tdef : constant Node_Id :=
3601 Type_Definition (Declaration_Node (Def_Id));
3606 if Nkind (Tdef) = N_Record_Definition then
3607 Clist := Component_List (Tdef);
3610 pragma Assert (Nkind (Tdef) = N_Derived_Type_Definition);
3611 Clist := Component_List (Record_Extension_Part (Tdef));
3614 if Present (Clist) then
3615 Comp := First (Component_Items (Clist));
3616 while Present (Comp) loop
3617 if Present (Expression (Comp)) then
3619 ("component of imported 'C'P'P type cannot have" &
3620 " default expression", Expression (Comp));
3630 ("second argument of pragma% must be object or subprogram",
3634 -- If this pragma applies to a compilation unit, then the unit, which
3635 -- is a subprogram, does not require (or allow) a body. We also do
3636 -- not need to elaborate imported procedures.
3638 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3640 Cunit : constant Node_Id := Parent (Parent (N));
3642 Set_Body_Required (Cunit, False);
3645 end Process_Import_Or_Interface;
3647 --------------------
3648 -- Process_Inline --
3649 --------------------
3651 procedure Process_Inline (Active : Boolean) is
3657 Effective : Boolean := False;
3659 procedure Make_Inline (Subp : Entity_Id);
3660 -- Subp is the defining unit name of the subprogram declaration. Set
3661 -- the flag, as well as the flag in the corresponding body, if there
3664 procedure Set_Inline_Flags (Subp : Entity_Id);
3665 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp and also
3666 -- Has_Pragma_Inline_Always for the Inline_Always case.
3668 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3669 -- Returns True if it can be determined at this stage that inlining
3670 -- is not possible, for example if the body is available and contains
3671 -- exception handlers, we prevent inlining, since otherwise we can
3672 -- get undefined symbols at link time. This function also emits a
3673 -- warning if front-end inlining is enabled and the pragma appears
3676 -- ??? is business with link symbols still valid, or does it relate
3677 -- to front end ZCX which is being phased out ???
3679 ---------------------------
3680 -- Inlining_Not_Possible --
3681 ---------------------------
3683 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3684 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3688 if Nkind (Decl) = N_Subprogram_Body then
3689 Stats := Handled_Statement_Sequence (Decl);
3690 return Present (Exception_Handlers (Stats))
3691 or else Present (At_End_Proc (Stats));
3693 elsif Nkind (Decl) = N_Subprogram_Declaration
3694 and then Present (Corresponding_Body (Decl))
3696 if Front_End_Inlining
3697 and then Analyzed (Corresponding_Body (Decl))
3699 Error_Msg_N ("pragma appears too late, ignored?", N);
3702 -- If the subprogram is a renaming as body, the body is just a
3703 -- call to the renamed subprogram, and inlining is trivially
3707 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
3708 N_Subprogram_Renaming_Declaration
3714 Handled_Statement_Sequence
3715 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3718 Present (Exception_Handlers (Stats))
3719 or else Present (At_End_Proc (Stats));
3723 -- If body is not available, assume the best, the check is
3724 -- performed again when compiling enclosing package bodies.
3728 end Inlining_Not_Possible;
3734 procedure Make_Inline (Subp : Entity_Id) is
3735 Kind : constant Entity_Kind := Ekind (Subp);
3736 Inner_Subp : Entity_Id := Subp;
3739 -- Ignore if bad type, avoid cascaded error
3741 if Etype (Subp) = Any_Type then
3745 -- Ignore if all inlining is suppressed
3747 elsif Suppress_All_Inlining then
3751 -- If inlining is not possible, for now do not treat as an error
3753 elsif Inlining_Not_Possible (Subp) then
3757 -- Here we have a candidate for inlining, but we must exclude
3758 -- derived operations. Otherwise we would end up trying to inline
3759 -- a phantom declaration, and the result would be to drag in a
3760 -- body which has no direct inlining associated with it. That
3761 -- would not only be inefficient but would also result in the
3762 -- backend doing cross-unit inlining in cases where it was
3763 -- definitely inappropriate to do so.
3765 -- However, a simple Comes_From_Source test is insufficient, since
3766 -- we do want to allow inlining of generic instances which also do
3767 -- not come from source. We also need to recognize specs generated
3768 -- by the front-end for bodies that carry the pragma. Finally,
3769 -- predefined operators do not come from source but are not
3770 -- inlineable either.
3772 elsif Is_Generic_Instance (Subp)
3773 or else Nkind (Parent (Parent (Subp))) = N_Subprogram_Declaration
3777 elsif not Comes_From_Source (Subp)
3778 and then Scope (Subp) /= Standard_Standard
3784 -- The referenced entity must either be the enclosing entity, or
3785 -- an entity declared within the current open scope.
3787 if Present (Scope (Subp))
3788 and then Scope (Subp) /= Current_Scope
3789 and then Subp /= Current_Scope
3792 ("argument of% must be entity in current scope", Assoc);
3796 -- Processing for procedure, operator or function. If subprogram
3797 -- is aliased (as for an instance) indicate that the renamed
3798 -- entity (if declared in the same unit) is inlined.
3800 if Is_Subprogram (Subp) then
3801 while Present (Alias (Inner_Subp)) loop
3802 Inner_Subp := Alias (Inner_Subp);
3805 if In_Same_Source_Unit (Subp, Inner_Subp) then
3806 Set_Inline_Flags (Inner_Subp);
3808 Decl := Parent (Parent (Inner_Subp));
3810 if Nkind (Decl) = N_Subprogram_Declaration
3811 and then Present (Corresponding_Body (Decl))
3813 Set_Inline_Flags (Corresponding_Body (Decl));
3815 elsif Is_Generic_Instance (Subp) then
3817 -- Indicate that the body needs to be created for
3818 -- inlining subsequent calls. The instantiation node
3819 -- follows the declaration of the wrapper package
3822 if Scope (Subp) /= Standard_Standard
3824 Need_Subprogram_Instance_Body
3825 (Next (Unit_Declaration_Node (Scope (Alias (Subp)))),
3835 -- For a generic subprogram set flag as well, for use at the point
3836 -- of instantiation, to determine whether the body should be
3839 elsif Is_Generic_Subprogram (Subp) then
3840 Set_Inline_Flags (Subp);
3843 -- Literals are by definition inlined
3845 elsif Kind = E_Enumeration_Literal then
3848 -- Anything else is an error
3852 ("expect subprogram name for pragma%", Assoc);
3856 ----------------------
3857 -- Set_Inline_Flags --
3858 ----------------------
3860 procedure Set_Inline_Flags (Subp : Entity_Id) is
3863 Set_Is_Inlined (Subp, True);
3866 if not Has_Pragma_Inline (Subp) then
3867 Set_Has_Pragma_Inline (Subp);
3871 if Prag_Id = Pragma_Inline_Always then
3872 Set_Has_Pragma_Inline_Always (Subp);
3874 end Set_Inline_Flags;
3876 -- Start of processing for Process_Inline
3879 Check_No_Identifiers;
3880 Check_At_Least_N_Arguments (1);
3883 Inline_Processing_Required := True;
3887 while Present (Assoc) loop
3888 Subp_Id := Expression (Assoc);
3892 if Is_Entity_Name (Subp_Id) then
3893 Subp := Entity (Subp_Id);
3895 if Subp = Any_Id then
3897 -- If previous error, avoid cascaded errors
3905 while Present (Homonym (Subp))
3906 and then Scope (Homonym (Subp)) = Current_Scope
3908 Make_Inline (Homonym (Subp));
3909 Subp := Homonym (Subp);
3916 ("inappropriate argument for pragma%", Assoc);
3919 and then Warn_On_Redundant_Constructs
3920 and then not Suppress_All_Inlining
3922 if Inlining_Not_Possible (Subp) then
3924 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
3927 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
3935 ----------------------------
3936 -- Process_Interface_Name --
3937 ----------------------------
3939 procedure Process_Interface_Name
3940 (Subprogram_Def : Entity_Id;
3946 String_Val : String_Id;
3948 procedure Check_Form_Of_Interface_Name
3950 Ext_Name_Case : Boolean);
3951 -- SN is a string literal node for an interface name. This routine
3952 -- performs some minimal checks that the name is reasonable. In
3953 -- particular that no spaces or other obviously incorrect characters
3954 -- appear. This is only a warning, since any characters are allowed.
3955 -- Ext_Name_Case is True for an External_Name, False for a Link_Name.
3957 ----------------------------------
3958 -- Check_Form_Of_Interface_Name --
3959 ----------------------------------
3961 procedure Check_Form_Of_Interface_Name
3963 Ext_Name_Case : Boolean)
3965 S : constant String_Id := Strval (Expr_Value_S (SN));
3966 SL : constant Nat := String_Length (S);
3971 Error_Msg_N ("interface name cannot be null string", SN);
3974 for J in 1 .. SL loop
3975 C := Get_String_Char (S, J);
3977 -- Look for dubious character and issue unconditional warning.
3978 -- Definitely dubious if not in character range.
3980 if not In_Character_Range (C)
3982 -- For all cases except CLI target,
3983 -- commas, spaces and slashes are dubious (in CLI, we use
3984 -- commas and backslashes in external names to specify
3985 -- assembly version and public key, while slashes and spaces
3986 -- can be used in names to mark nested classes and
3989 or else ((not Ext_Name_Case or else VM_Target /= CLI_Target)
3990 and then (Get_Character (C) = ','
3992 Get_Character (C) = '\'))
3993 or else (VM_Target /= CLI_Target
3994 and then (Get_Character (C) = ' '
3996 Get_Character (C) = '/'))
3999 ("?interface name contains illegal character",
4000 Sloc (SN) + Source_Ptr (J));
4003 end Check_Form_Of_Interface_Name;
4005 -- Start of processing for Process_Interface_Name
4008 if No (Link_Arg) then
4009 if No (Ext_Arg) then
4010 if VM_Target = CLI_Target
4011 and then Ekind (Subprogram_Def) = E_Package
4012 and then Nkind (Parent (Subprogram_Def)) =
4013 N_Package_Specification
4014 and then Present (Generic_Parent (Parent (Subprogram_Def)))
4019 (Generic_Parent (Parent (Subprogram_Def))));
4024 elsif Chars (Ext_Arg) = Name_Link_Name then
4026 Link_Nam := Expression (Ext_Arg);
4029 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
4030 Ext_Nam := Expression (Ext_Arg);
4035 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
4036 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
4037 Ext_Nam := Expression (Ext_Arg);
4038 Link_Nam := Expression (Link_Arg);
4041 -- Check expressions for external name and link name are static
4043 if Present (Ext_Nam) then
4044 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
4045 Check_Form_Of_Interface_Name (Ext_Nam, Ext_Name_Case => True);
4047 -- Verify that external name is not the name of a local entity,
4048 -- which would hide the imported one and could lead to run-time
4049 -- surprises. The problem can only arise for entities declared in
4050 -- a package body (otherwise the external name is fully qualified
4051 -- and will not conflict).
4059 if Prag_Id = Pragma_Import then
4060 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
4062 E := Entity_Id (Get_Name_Table_Info (Nam));
4064 if Nam /= Chars (Subprogram_Def)
4065 and then Present (E)
4066 and then not Is_Overloadable (E)
4067 and then Is_Immediately_Visible (E)
4068 and then not Is_Imported (E)
4069 and then Ekind (Scope (E)) = E_Package
4072 while Present (Par) loop
4073 if Nkind (Par) = N_Package_Body then
4074 Error_Msg_Sloc := Sloc (E);
4076 ("imported entity is hidden by & declared#",
4081 Par := Parent (Par);
4088 if Present (Link_Nam) then
4089 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
4090 Check_Form_Of_Interface_Name (Link_Nam, Ext_Name_Case => False);
4093 -- If there is no link name, just set the external name
4095 if No (Link_Nam) then
4096 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
4098 -- For the Link_Name case, the given literal is preceded by an
4099 -- asterisk, which indicates to GCC that the given name should be
4100 -- taken literally, and in particular that no prepending of
4101 -- underlines should occur, even in systems where this is the
4107 if VM_Target = No_VM then
4108 Store_String_Char (Get_Char_Code ('*'));
4111 String_Val := Strval (Expr_Value_S (Link_Nam));
4112 Store_String_Chars (String_Val);
4114 Make_String_Literal (Sloc (Link_Nam),
4115 Strval => End_String);
4118 Set_Encoded_Interface_Name
4119 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
4120 Check_Duplicated_Export_Name (Link_Nam);
4121 end Process_Interface_Name;
4123 -----------------------------------------
4124 -- Process_Interrupt_Or_Attach_Handler --
4125 -----------------------------------------
4127 procedure Process_Interrupt_Or_Attach_Handler is
4128 Arg1_X : constant Node_Id := Expression (Arg1);
4129 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
4130 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
4133 Set_Is_Interrupt_Handler (Handler_Proc);
4135 -- If the pragma is not associated with a handler procedure within a
4136 -- protected type, then it must be for a nonprotected procedure for
4137 -- the AAMP target, in which case we don't associate a representation
4138 -- item with the procedure's scope.
4140 if Ekind (Proc_Scope) = E_Protected_Type then
4141 if Prag_Id = Pragma_Interrupt_Handler
4143 Prag_Id = Pragma_Attach_Handler
4145 Record_Rep_Item (Proc_Scope, N);
4148 end Process_Interrupt_Or_Attach_Handler;
4150 --------------------------------------------------
4151 -- Process_Restrictions_Or_Restriction_Warnings --
4152 --------------------------------------------------
4154 -- Note: some of the simple identifier cases were handled in par-prag,
4155 -- but it is harmless (and more straightforward) to simply handle all
4156 -- cases here, even if it means we repeat a bit of work in some cases.
4158 procedure Process_Restrictions_Or_Restriction_Warnings
4162 R_Id : Restriction_Id;
4167 procedure Check_Unit_Name (N : Node_Id);
4168 -- Checks unit name parameter for No_Dependence. Returns if it has
4169 -- an appropriate form, otherwise raises pragma argument error.
4171 ---------------------
4172 -- Check_Unit_Name --
4173 ---------------------
4175 procedure Check_Unit_Name (N : Node_Id) is
4177 if Nkind (N) = N_Selected_Component then
4178 Check_Unit_Name (Prefix (N));
4179 Check_Unit_Name (Selector_Name (N));
4181 elsif Nkind (N) = N_Identifier then
4186 ("wrong form for unit name for No_Dependence", N);
4188 end Check_Unit_Name;
4190 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
4193 Check_Ada_83_Warning;
4194 Check_At_Least_N_Arguments (1);
4195 Check_Valid_Configuration_Pragma;
4198 while Present (Arg) loop
4200 Expr := Expression (Arg);
4202 -- Case of no restriction identifier present
4204 if Id = No_Name then
4205 if Nkind (Expr) /= N_Identifier then
4207 ("invalid form for restriction", Arg);
4212 (Process_Restriction_Synonyms (Expr));
4214 if R_Id not in All_Boolean_Restrictions then
4215 Error_Msg_Name_1 := Pname;
4217 ("invalid restriction identifier&", Get_Pragma_Arg (Arg));
4219 -- Check for possible misspelling
4221 for J in Restriction_Id loop
4223 Rnm : constant String := Restriction_Id'Image (J);
4226 Name_Buffer (1 .. Rnm'Length) := Rnm;
4227 Name_Len := Rnm'Length;
4228 Set_Casing (All_Lower_Case);
4230 if Is_Bad_Spelling_Of (Chars (Expr), Name_Enter) then
4232 (Identifier_Casing (Current_Source_File));
4233 Error_Msg_String (1 .. Rnm'Length) :=
4234 Name_Buffer (1 .. Name_Len);
4235 Error_Msg_Strlen := Rnm'Length;
4236 Error_Msg_N -- CODEFIX
4237 ("\possible misspelling of ""~""",
4238 Get_Pragma_Arg (Arg));
4247 if Implementation_Restriction (R_Id) then
4248 Check_Restriction (No_Implementation_Restrictions, Arg);
4251 -- If this is a warning, then set the warning unless we already
4252 -- have a real restriction active (we never want a warning to
4253 -- override a real restriction).
4256 if not Restriction_Active (R_Id) then
4257 Set_Restriction (R_Id, N);
4258 Restriction_Warnings (R_Id) := True;
4261 -- If real restriction case, then set it and make sure that the
4262 -- restriction warning flag is off, since a real restriction
4263 -- always overrides a warning.
4266 Set_Restriction (R_Id, N);
4267 Restriction_Warnings (R_Id) := False;
4270 -- A very special case that must be processed here: pragma
4271 -- Restrictions (No_Exceptions) turns off all run-time
4272 -- checking. This is a bit dubious in terms of the formal
4273 -- language definition, but it is what is intended by RM
4274 -- H.4(12). Restriction_Warnings never affects generated code
4275 -- so this is done only in the real restriction case.
4277 if R_Id = No_Exceptions and then not Warn then
4278 Scope_Suppress := (others => True);
4281 -- Case of No_Dependence => unit-name. Note that the parser
4282 -- already made the necessary entry in the No_Dependence table.
4284 elsif Id = Name_No_Dependence then
4285 Check_Unit_Name (Expr);
4287 -- All other cases of restriction identifier present
4290 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
4291 Analyze_And_Resolve (Expr, Any_Integer);
4293 if R_Id not in All_Parameter_Restrictions then
4295 ("invalid restriction parameter identifier", Arg);
4297 elsif not Is_OK_Static_Expression (Expr) then
4298 Flag_Non_Static_Expr
4299 ("value must be static expression!", Expr);
4302 elsif not Is_Integer_Type (Etype (Expr))
4303 or else Expr_Value (Expr) < 0
4306 ("value must be non-negative integer", Arg);
4309 -- Restriction pragma is active
4311 Val := Expr_Value (Expr);
4313 if not UI_Is_In_Int_Range (Val) then
4315 ("pragma ignored, value too large?", Arg);
4318 -- Warning case. If the real restriction is active, then we
4319 -- ignore the request, since warning never overrides a real
4320 -- restriction. Otherwise we set the proper warning. Note that
4321 -- this circuit sets the warning again if it is already set,
4322 -- which is what we want, since the constant may have changed.
4325 if not Restriction_Active (R_Id) then
4327 (R_Id, N, Integer (UI_To_Int (Val)));
4328 Restriction_Warnings (R_Id) := True;
4331 -- Real restriction case, set restriction and make sure warning
4332 -- flag is off since real restriction always overrides warning.
4335 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
4336 Restriction_Warnings (R_Id) := False;
4342 end Process_Restrictions_Or_Restriction_Warnings;
4344 ---------------------------------
4345 -- Process_Suppress_Unsuppress --
4346 ---------------------------------
4348 -- Note: this procedure makes entries in the check suppress data
4349 -- structures managed by Sem. See spec of package Sem for full
4350 -- details on how we handle recording of check suppression.
4352 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
4357 In_Package_Spec : constant Boolean :=
4358 Is_Package_Or_Generic_Package (Current_Scope)
4359 and then not In_Package_Body (Current_Scope);
4361 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
4362 -- Used to suppress a single check on the given entity
4364 --------------------------------
4365 -- Suppress_Unsuppress_Echeck --
4366 --------------------------------
4368 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
4370 Set_Checks_May_Be_Suppressed (E);
4372 if In_Package_Spec then
4373 Push_Global_Suppress_Stack_Entry
4376 Suppress => Suppress_Case);
4379 Push_Local_Suppress_Stack_Entry
4382 Suppress => Suppress_Case);
4385 -- If this is a first subtype, and the base type is distinct,
4386 -- then also set the suppress flags on the base type.
4388 if Is_First_Subtype (E)
4389 and then Etype (E) /= E
4391 Suppress_Unsuppress_Echeck (Etype (E), C);
4393 end Suppress_Unsuppress_Echeck;
4395 -- Start of processing for Process_Suppress_Unsuppress
4398 -- Suppress/Unsuppress can appear as a configuration pragma, or in a
4399 -- declarative part or a package spec (RM 11.5(5)).
4401 if not Is_Configuration_Pragma then
4402 Check_Is_In_Decl_Part_Or_Package_Spec;
4405 Check_At_Least_N_Arguments (1);
4406 Check_At_Most_N_Arguments (2);
4407 Check_No_Identifier (Arg1);
4408 Check_Arg_Is_Identifier (Arg1);
4410 C := Get_Check_Id (Chars (Expression (Arg1)));
4412 if C = No_Check_Id then
4414 ("argument of pragma% is not valid check name", Arg1);
4417 if not Suppress_Case
4418 and then (C = All_Checks or else C = Overflow_Check)
4420 Opt.Overflow_Checks_Unsuppressed := True;
4423 if Arg_Count = 1 then
4425 -- Make an entry in the local scope suppress table. This is the
4426 -- table that directly shows the current value of the scope
4427 -- suppress check for any check id value.
4429 if C = All_Checks then
4431 -- For All_Checks, we set all specific predefined checks with
4432 -- the exception of Elaboration_Check, which is handled
4433 -- specially because of not wanting All_Checks to have the
4434 -- effect of deactivating static elaboration order processing.
4436 for J in Scope_Suppress'Range loop
4437 if J /= Elaboration_Check then
4438 Scope_Suppress (J) := Suppress_Case;
4442 -- If not All_Checks, and predefined check, then set appropriate
4443 -- scope entry. Note that we will set Elaboration_Check if this
4444 -- is explicitly specified.
4446 elsif C in Predefined_Check_Id then
4447 Scope_Suppress (C) := Suppress_Case;
4450 -- Also make an entry in the Local_Entity_Suppress table
4452 Push_Local_Suppress_Stack_Entry
4455 Suppress => Suppress_Case);
4457 -- Case of two arguments present, where the check is suppressed for
4458 -- a specified entity (given as the second argument of the pragma)
4461 Check_Optional_Identifier (Arg2, Name_On);
4462 E_Id := Expression (Arg2);
4465 if not Is_Entity_Name (E_Id) then
4467 ("second argument of pragma% must be entity name", Arg2);
4476 -- Enforce RM 11.5(7) which requires that for a pragma that
4477 -- appears within a package spec, the named entity must be
4478 -- within the package spec. We allow the package name itself
4479 -- to be mentioned since that makes sense, although it is not
4480 -- strictly allowed by 11.5(7).
4483 and then E /= Current_Scope
4484 and then Scope (E) /= Current_Scope
4487 ("entity in pragma% is not in package spec (RM 11.5(7))",
4491 -- Loop through homonyms. As noted below, in the case of a package
4492 -- spec, only homonyms within the package spec are considered.
4495 Suppress_Unsuppress_Echeck (E, C);
4497 if Is_Generic_Instance (E)
4498 and then Is_Subprogram (E)
4499 and then Present (Alias (E))
4501 Suppress_Unsuppress_Echeck (Alias (E), C);
4504 -- Move to next homonym
4509 -- If we are within a package specification, the pragma only
4510 -- applies to homonyms in the same scope.
4512 exit when In_Package_Spec
4513 and then Scope (E) /= Current_Scope;
4516 end Process_Suppress_Unsuppress;
4522 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
4524 if Is_Imported (E) then
4526 ("cannot export entity& that was previously imported", Arg);
4528 elsif Present (Address_Clause (E)) then
4530 ("cannot export entity& that has an address clause", Arg);
4533 Set_Is_Exported (E);
4535 -- Generate a reference for entity explicitly, because the
4536 -- identifier may be overloaded and name resolution will not
4539 Generate_Reference (E, Arg);
4541 -- Deal with exporting non-library level entity
4543 if not Is_Library_Level_Entity (E) then
4545 -- Not allowed at all for subprograms
4547 if Is_Subprogram (E) then
4548 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
4550 -- Otherwise set public and statically allocated
4554 Set_Is_Statically_Allocated (E);
4556 -- Warn if the corresponding W flag is set and the pragma comes
4557 -- from source. The latter may not be true e.g. on VMS where we
4558 -- expand export pragmas for exception codes associated with
4559 -- imported or exported exceptions. We do not want to generate
4560 -- a warning for something that the user did not write.
4562 if Warn_On_Export_Import
4563 and then Comes_From_Source (Arg)
4566 ("?& has been made static as a result of Export", Arg, E);
4568 ("\this usage is non-standard and non-portable", Arg);
4573 if Warn_On_Export_Import and then Is_Type (E) then
4575 ("exporting a type has no effect?", Arg, E);
4578 if Warn_On_Export_Import and Inside_A_Generic then
4580 ("all instances of& will have the same external name?", Arg, E);
4584 ----------------------------------------------
4585 -- Set_Extended_Import_Export_External_Name --
4586 ----------------------------------------------
4588 procedure Set_Extended_Import_Export_External_Name
4589 (Internal_Ent : Entity_Id;
4590 Arg_External : Node_Id)
4592 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
4596 if No (Arg_External) then
4600 Check_Arg_Is_External_Name (Arg_External);
4602 if Nkind (Arg_External) = N_String_Literal then
4603 if String_Length (Strval (Arg_External)) = 0 then
4606 New_Name := Adjust_External_Name_Case (Arg_External);
4609 elsif Nkind (Arg_External) = N_Identifier then
4610 New_Name := Get_Default_External_Name (Arg_External);
4612 -- Check_Arg_Is_External_Name should let through only identifiers and
4613 -- string literals or static string expressions (which are folded to
4614 -- string literals).
4617 raise Program_Error;
4620 -- If we already have an external name set (by a prior normal Import
4621 -- or Export pragma), then the external names must match
4623 if Present (Interface_Name (Internal_Ent)) then
4624 Check_Matching_Internal_Names : declare
4625 S1 : constant String_Id := Strval (Old_Name);
4626 S2 : constant String_Id := Strval (New_Name);
4629 -- Called if names do not match
4635 procedure Mismatch is
4637 Error_Msg_Sloc := Sloc (Old_Name);
4639 ("external name does not match that given #",
4643 -- Start of processing for Check_Matching_Internal_Names
4646 if String_Length (S1) /= String_Length (S2) then
4650 for J in 1 .. String_Length (S1) loop
4651 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
4656 end Check_Matching_Internal_Names;
4658 -- Otherwise set the given name
4661 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
4662 Check_Duplicated_Export_Name (New_Name);
4664 end Set_Extended_Import_Export_External_Name;
4670 procedure Set_Imported (E : Entity_Id) is
4672 -- Error message if already imported or exported
4674 if Is_Exported (E) or else Is_Imported (E) then
4675 if Is_Exported (E) then
4676 Error_Msg_NE ("entity& was previously exported", N, E);
4678 Error_Msg_NE ("entity& was previously imported", N, E);
4681 Error_Msg_Name_1 := Pname;
4683 ("\(pragma% applies to all previous entities)", N);
4685 Error_Msg_Sloc := Sloc (E);
4686 Error_Msg_NE ("\import not allowed for& declared#", N, E);
4688 -- Here if not previously imported or exported, OK to import
4691 Set_Is_Imported (E);
4693 -- If the entity is an object that is not at the library level,
4694 -- then it is statically allocated. We do not worry about objects
4695 -- with address clauses in this context since they are not really
4696 -- imported in the linker sense.
4699 and then not Is_Library_Level_Entity (E)
4700 and then No (Address_Clause (E))
4702 Set_Is_Statically_Allocated (E);
4707 -------------------------
4708 -- Set_Mechanism_Value --
4709 -------------------------
4711 -- Note: the mechanism name has not been analyzed (and cannot indeed be
4712 -- analyzed, since it is semantic nonsense), so we get it in the exact
4713 -- form created by the parser.
4715 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
4718 Mech_Name_Id : Name_Id;
4720 procedure Bad_Class;
4721 -- Signal bad descriptor class name
4723 procedure Bad_Mechanism;
4724 -- Signal bad mechanism name
4730 procedure Bad_Class is
4732 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
4735 -------------------------
4736 -- Bad_Mechanism_Value --
4737 -------------------------
4739 procedure Bad_Mechanism is
4741 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
4744 -- Start of processing for Set_Mechanism_Value
4747 if Mechanism (Ent) /= Default_Mechanism then
4749 ("mechanism for & has already been set", Mech_Name, Ent);
4752 -- MECHANISM_NAME ::= value | reference | descriptor |
4755 if Nkind (Mech_Name) = N_Identifier then
4756 if Chars (Mech_Name) = Name_Value then
4757 Set_Mechanism (Ent, By_Copy);
4760 elsif Chars (Mech_Name) = Name_Reference then
4761 Set_Mechanism (Ent, By_Reference);
4764 elsif Chars (Mech_Name) = Name_Descriptor then
4765 Check_VMS (Mech_Name);
4766 Set_Mechanism (Ent, By_Descriptor);
4769 elsif Chars (Mech_Name) = Name_Short_Descriptor then
4770 Check_VMS (Mech_Name);
4771 Set_Mechanism (Ent, By_Short_Descriptor);
4774 elsif Chars (Mech_Name) = Name_Copy then
4776 ("bad mechanism name, Value assumed", Mech_Name);
4782 -- MECHANISM_NAME ::= descriptor (CLASS_NAME) |
4783 -- short_descriptor (CLASS_NAME)
4784 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4786 -- Note: this form is parsed as an indexed component
4788 elsif Nkind (Mech_Name) = N_Indexed_Component then
4790 Class := First (Expressions (Mech_Name));
4792 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4793 or else not (Chars (Prefix (Mech_Name)) = Name_Descriptor or else
4794 Chars (Prefix (Mech_Name)) = Name_Short_Descriptor)
4795 or else Present (Next (Class))
4799 Mech_Name_Id := Chars (Prefix (Mech_Name));
4802 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME) |
4803 -- short_descriptor (Class => CLASS_NAME)
4804 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4806 -- Note: this form is parsed as a function call
4808 elsif Nkind (Mech_Name) = N_Function_Call then
4810 Param := First (Parameter_Associations (Mech_Name));
4812 if Nkind (Name (Mech_Name)) /= N_Identifier
4813 or else not (Chars (Name (Mech_Name)) = Name_Descriptor or else
4814 Chars (Name (Mech_Name)) = Name_Short_Descriptor)
4815 or else Present (Next (Param))
4816 or else No (Selector_Name (Param))
4817 or else Chars (Selector_Name (Param)) /= Name_Class
4821 Class := Explicit_Actual_Parameter (Param);
4822 Mech_Name_Id := Chars (Name (Mech_Name));
4829 -- Fall through here with Class set to descriptor class name
4831 Check_VMS (Mech_Name);
4833 if Nkind (Class) /= N_Identifier then
4836 elsif Mech_Name_Id = Name_Descriptor
4837 and then Chars (Class) = Name_UBS
4839 Set_Mechanism (Ent, By_Descriptor_UBS);
4841 elsif Mech_Name_Id = Name_Descriptor
4842 and then Chars (Class) = Name_UBSB
4844 Set_Mechanism (Ent, By_Descriptor_UBSB);
4846 elsif Mech_Name_Id = Name_Descriptor
4847 and then Chars (Class) = Name_UBA
4849 Set_Mechanism (Ent, By_Descriptor_UBA);
4851 elsif Mech_Name_Id = Name_Descriptor
4852 and then Chars (Class) = Name_S
4854 Set_Mechanism (Ent, By_Descriptor_S);
4856 elsif Mech_Name_Id = Name_Descriptor
4857 and then Chars (Class) = Name_SB
4859 Set_Mechanism (Ent, By_Descriptor_SB);
4861 elsif Mech_Name_Id = Name_Descriptor
4862 and then Chars (Class) = Name_A
4864 Set_Mechanism (Ent, By_Descriptor_A);
4866 elsif Mech_Name_Id = Name_Descriptor
4867 and then Chars (Class) = Name_NCA
4869 Set_Mechanism (Ent, By_Descriptor_NCA);
4871 elsif Mech_Name_Id = Name_Short_Descriptor
4872 and then Chars (Class) = Name_UBS
4874 Set_Mechanism (Ent, By_Short_Descriptor_UBS);
4876 elsif Mech_Name_Id = Name_Short_Descriptor
4877 and then Chars (Class) = Name_UBSB
4879 Set_Mechanism (Ent, By_Short_Descriptor_UBSB);
4881 elsif Mech_Name_Id = Name_Short_Descriptor
4882 and then Chars (Class) = Name_UBA
4884 Set_Mechanism (Ent, By_Short_Descriptor_UBA);
4886 elsif Mech_Name_Id = Name_Short_Descriptor
4887 and then Chars (Class) = Name_S
4889 Set_Mechanism (Ent, By_Short_Descriptor_S);
4891 elsif Mech_Name_Id = Name_Short_Descriptor
4892 and then Chars (Class) = Name_SB
4894 Set_Mechanism (Ent, By_Short_Descriptor_SB);
4896 elsif Mech_Name_Id = Name_Short_Descriptor
4897 and then Chars (Class) = Name_A
4899 Set_Mechanism (Ent, By_Short_Descriptor_A);
4901 elsif Mech_Name_Id = Name_Short_Descriptor
4902 and then Chars (Class) = Name_NCA
4904 Set_Mechanism (Ent, By_Short_Descriptor_NCA);
4909 end Set_Mechanism_Value;
4911 ---------------------------
4912 -- Set_Ravenscar_Profile --
4913 ---------------------------
4915 -- The tasks to be done here are
4917 -- Set required policies
4919 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4920 -- pragma Locking_Policy (Ceiling_Locking)
4922 -- Set Detect_Blocking mode
4924 -- Set required restrictions (see System.Rident for detailed list)
4926 procedure Set_Ravenscar_Profile (N : Node_Id) is
4928 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4930 if Task_Dispatching_Policy /= ' '
4931 and then Task_Dispatching_Policy /= 'F'
4933 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
4934 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4936 -- Set the FIFO_Within_Priorities policy, but always preserve
4937 -- System_Location since we like the error message with the run time
4941 Task_Dispatching_Policy := 'F';
4943 if Task_Dispatching_Policy_Sloc /= System_Location then
4944 Task_Dispatching_Policy_Sloc := Loc;
4948 -- pragma Locking_Policy (Ceiling_Locking)
4950 if Locking_Policy /= ' '
4951 and then Locking_Policy /= 'C'
4953 Error_Msg_Sloc := Locking_Policy_Sloc;
4954 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4956 -- Set the Ceiling_Locking policy, but preserve System_Location since
4957 -- we like the error message with the run time name.
4960 Locking_Policy := 'C';
4962 if Locking_Policy_Sloc /= System_Location then
4963 Locking_Policy_Sloc := Loc;
4967 -- pragma Detect_Blocking
4969 Detect_Blocking := True;
4971 -- Set the corresponding restrictions
4973 Set_Profile_Restrictions
4974 (Ravenscar, N, Warn => Treat_Restrictions_As_Warnings);
4975 end Set_Ravenscar_Profile;
4977 -- Start of processing for Analyze_Pragma
4980 -- Deal with unrecognized pragma
4982 if not Is_Pragma_Name (Pname) then
4983 if Warn_On_Unrecognized_Pragma then
4984 Error_Msg_Name_1 := Pname;
4985 Error_Msg_N ("?unrecognized pragma%!", Pragma_Identifier (N));
4987 for PN in First_Pragma_Name .. Last_Pragma_Name loop
4988 if Is_Bad_Spelling_Of (Pname, PN) then
4989 Error_Msg_Name_1 := PN;
4990 Error_Msg_N -- CODEFIX
4991 ("\?possible misspelling of %!", Pragma_Identifier (N));
5000 -- Here to start processing for recognized pragma
5002 Prag_Id := Get_Pragma_Id (Pname);
5011 if Present (Pragma_Argument_Associations (N)) then
5012 Arg1 := First (Pragma_Argument_Associations (N));
5014 if Present (Arg1) then
5015 Arg2 := Next (Arg1);
5017 if Present (Arg2) then
5018 Arg3 := Next (Arg2);
5020 if Present (Arg3) then
5021 Arg4 := Next (Arg3);
5027 -- Count number of arguments
5034 while Present (Arg_Node) loop
5035 Arg_Count := Arg_Count + 1;
5040 -- An enumeration type defines the pragmas that are supported by the
5041 -- implementation. Get_Pragma_Id (in package Prag) transforms a name
5042 -- into the corresponding enumeration value for the following case.
5050 -- pragma Abort_Defer;
5052 when Pragma_Abort_Defer =>
5054 Check_Arg_Count (0);
5056 -- The only required semantic processing is to check the
5057 -- placement. This pragma must appear at the start of the
5058 -- statement sequence of a handled sequence of statements.
5060 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
5061 or else N /= First (Statements (Parent (N)))
5072 -- Note: this pragma also has some specific processing in Par.Prag
5073 -- because we want to set the Ada version mode during parsing.
5075 when Pragma_Ada_83 =>
5077 Check_Arg_Count (0);
5079 -- We really should check unconditionally for proper configuration
5080 -- pragma placement, since we really don't want mixed Ada modes
5081 -- within a single unit, and the GNAT reference manual has always
5082 -- said this was a configuration pragma, but we did not check and
5083 -- are hesitant to add the check now.
5085 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
5086 -- or Ada 95, so we must check if we are in Ada 2005 mode.
5088 if Ada_Version >= Ada_05 then
5089 Check_Valid_Configuration_Pragma;
5092 -- Now set Ada 83 mode
5094 Ada_Version := Ada_83;
5095 Ada_Version_Explicit := Ada_Version;
5103 -- Note: this pragma also has some specific processing in Par.Prag
5104 -- because we want to set the Ada 83 version mode during parsing.
5106 when Pragma_Ada_95 =>
5108 Check_Arg_Count (0);
5110 -- We really should check unconditionally for proper configuration
5111 -- pragma placement, since we really don't want mixed Ada modes
5112 -- within a single unit, and the GNAT reference manual has always
5113 -- said this was a configuration pragma, but we did not check and
5114 -- are hesitant to add the check now.
5116 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
5117 -- or Ada 95, so we must check if we are in Ada 2005 mode.
5119 if Ada_Version >= Ada_05 then
5120 Check_Valid_Configuration_Pragma;
5123 -- Now set Ada 95 mode
5125 Ada_Version := Ada_95;
5126 Ada_Version_Explicit := Ada_Version;
5128 ---------------------
5129 -- Ada_05/Ada_2005 --
5130 ---------------------
5133 -- pragma Ada_05 (LOCAL_NAME);
5136 -- pragma Ada_2005 (LOCAL_NAME):
5138 -- Note: these pragma also have some specific processing in Par.Prag
5139 -- because we want to set the Ada 2005 version mode during parsing.
5141 when Pragma_Ada_05 | Pragma_Ada_2005 => declare
5147 if Arg_Count = 1 then
5148 Check_Arg_Is_Local_Name (Arg1);
5149 E_Id := Expression (Arg1);
5151 if Etype (E_Id) = Any_Type then
5155 Set_Is_Ada_2005_Only (Entity (E_Id));
5158 Check_Arg_Count (0);
5160 -- For Ada_2005 we unconditionally enforce the documented
5161 -- configuration pragma placement, since we do not want to
5162 -- tolerate mixed modes in a unit involving Ada 2005. That
5163 -- would cause real difficulties for those cases where there
5164 -- are incompatibilities between Ada 95 and Ada 2005.
5166 Check_Valid_Configuration_Pragma;
5168 -- Now set Ada 2005 mode
5170 Ada_Version := Ada_05;
5171 Ada_Version_Explicit := Ada_05;
5175 ----------------------
5176 -- All_Calls_Remote --
5177 ----------------------
5179 -- pragma All_Calls_Remote [(library_package_NAME)];
5181 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
5182 Lib_Entity : Entity_Id;
5185 Check_Ada_83_Warning;
5186 Check_Valid_Library_Unit_Pragma;
5188 if Nkind (N) = N_Null_Statement then
5192 Lib_Entity := Find_Lib_Unit_Name;
5194 -- This pragma should only apply to a RCI unit (RM E.2.3(23))
5196 if Present (Lib_Entity)
5197 and then not Debug_Flag_U
5199 if not Is_Remote_Call_Interface (Lib_Entity) then
5200 Error_Pragma ("pragma% only apply to rci unit");
5202 -- Set flag for entity of the library unit
5205 Set_Has_All_Calls_Remote (Lib_Entity);
5209 end All_Calls_Remote;
5215 -- pragma Annotate (IDENTIFIER [, IDENTIFIER {, ARG}]);
5216 -- ARG ::= NAME | EXPRESSION
5218 -- The first two arguments are by convention intended to refer to an
5219 -- external tool and a tool-specific function. These arguments are
5222 when Pragma_Annotate => Annotate : begin
5224 Check_At_Least_N_Arguments (1);
5225 Check_Arg_Is_Identifier (Arg1);
5232 -- Second unanalyzed parameter is optional
5238 while Present (Arg) loop
5239 Exp := Expression (Arg);
5242 if Is_Entity_Name (Exp) then
5245 elsif Nkind (Exp) = N_String_Literal then
5246 Resolve (Exp, Standard_String);
5248 elsif Is_Overloaded (Exp) then
5250 ("ambiguous argument for pragma%", Exp);
5266 -- pragma Assert ([Check =>] Boolean_EXPRESSION
5267 -- [, [Message =>] Static_String_EXPRESSION]);
5269 when Pragma_Assert => Assert : declare
5275 Check_At_Least_N_Arguments (1);
5276 Check_At_Most_N_Arguments (2);
5277 Check_Arg_Order ((Name_Check, Name_Message));
5278 Check_Optional_Identifier (Arg1, Name_Check);
5280 -- We treat pragma Assert as equivalent to:
5282 -- pragma Check (Assertion, condition [, msg]);
5284 -- So rewrite pragma in this manner, and analyze the result
5286 Expr := Get_Pragma_Arg (Arg1);
5288 Make_Pragma_Argument_Association (Loc,
5290 Make_Identifier (Loc,
5291 Chars => Name_Assertion)),
5293 Make_Pragma_Argument_Association (Sloc (Expr),
5294 Expression => Expr));
5296 if Arg_Count > 1 then
5297 Check_Optional_Identifier (Arg2, Name_Message);
5298 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
5299 Append_To (Newa, Relocate_Node (Arg2));
5304 Chars => Name_Check,
5305 Pragma_Argument_Associations => Newa));
5309 ----------------------
5310 -- Assertion_Policy --
5311 ----------------------
5313 -- pragma Assertion_Policy (Check | Ignore)
5315 when Pragma_Assertion_Policy => Assertion_Policy : declare
5320 Check_Valid_Configuration_Pragma;
5321 Check_Arg_Count (1);
5322 Check_No_Identifiers;
5323 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
5325 -- We treat pragma Assertion_Policy as equivalent to:
5327 -- pragma Check_Policy (Assertion, policy)
5329 -- So rewrite the pragma in that manner and link on to the chain
5330 -- of Check_Policy pragmas, marking the pragma as analyzed.
5332 Policy := Get_Pragma_Arg (Arg1);
5336 Chars => Name_Check_Policy,
5338 Pragma_Argument_Associations => New_List (
5339 Make_Pragma_Argument_Association (Loc,
5341 Make_Identifier (Loc,
5342 Chars => Name_Assertion)),
5344 Make_Pragma_Argument_Association (Loc,
5346 Make_Identifier (Sloc (Policy),
5347 Chars => Chars (Policy))))));
5350 Set_Next_Pragma (N, Opt.Check_Policy_List);
5351 Opt.Check_Policy_List := N;
5352 end Assertion_Policy;
5354 ------------------------------
5355 -- Assume_No_Invalid_Values --
5356 ------------------------------
5358 -- pragma Assume_No_Invalid_Values (On | Off);
5360 when Pragma_Assume_No_Invalid_Values =>
5362 Check_Valid_Configuration_Pragma;
5363 Check_Arg_Count (1);
5364 Check_No_Identifiers;
5365 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5367 if Chars (Expression (Arg1)) = Name_On then
5368 Assume_No_Invalid_Values := True;
5370 Assume_No_Invalid_Values := False;
5377 -- pragma AST_Entry (entry_IDENTIFIER);
5379 when Pragma_AST_Entry => AST_Entry : declare
5385 Check_Arg_Count (1);
5386 Check_No_Identifiers;
5387 Check_Arg_Is_Local_Name (Arg1);
5388 Ent := Entity (Expression (Arg1));
5390 -- Note: the implementation of the AST_Entry pragma could handle
5391 -- the entry family case fine, but for now we are consistent with
5392 -- the DEC rules, and do not allow the pragma, which of course
5393 -- has the effect of also forbidding the attribute.
5395 if Ekind (Ent) /= E_Entry then
5397 ("pragma% argument must be simple entry name", Arg1);
5399 elsif Is_AST_Entry (Ent) then
5401 ("duplicate % pragma for entry", Arg1);
5403 elsif Has_Homonym (Ent) then
5405 ("pragma% argument cannot specify overloaded entry", Arg1);
5409 FF : constant Entity_Id := First_Formal (Ent);
5412 if Present (FF) then
5413 if Present (Next_Formal (FF)) then
5415 ("entry for pragma% can have only one argument",
5418 elsif Parameter_Mode (FF) /= E_In_Parameter then
5420 ("entry parameter for pragma% must have mode IN",
5426 Set_Is_AST_Entry (Ent);
5434 -- pragma Asynchronous (LOCAL_NAME);
5436 when Pragma_Asynchronous => Asynchronous : declare
5444 procedure Process_Async_Pragma;
5445 -- Common processing for procedure and access-to-procedure case
5447 --------------------------
5448 -- Process_Async_Pragma --
5449 --------------------------
5451 procedure Process_Async_Pragma is
5454 Set_Is_Asynchronous (Nm);
5458 -- The formals should be of mode IN (RM E.4.1(6))
5461 while Present (S) loop
5462 Formal := Defining_Identifier (S);
5464 if Nkind (Formal) = N_Defining_Identifier
5465 and then Ekind (Formal) /= E_In_Parameter
5468 ("pragma% procedure can only have IN parameter",
5475 Set_Is_Asynchronous (Nm);
5476 end Process_Async_Pragma;
5478 -- Start of processing for pragma Asynchronous
5481 Check_Ada_83_Warning;
5482 Check_No_Identifiers;
5483 Check_Arg_Count (1);
5484 Check_Arg_Is_Local_Name (Arg1);
5486 if Debug_Flag_U then
5490 C_Ent := Cunit_Entity (Current_Sem_Unit);
5491 Analyze (Expression (Arg1));
5492 Nm := Entity (Expression (Arg1));
5494 if not Is_Remote_Call_Interface (C_Ent)
5495 and then not Is_Remote_Types (C_Ent)
5497 -- This pragma should only appear in an RCI or Remote Types
5498 -- unit (RM E.4.1(4)).
5501 ("pragma% not in Remote_Call_Interface or " &
5502 "Remote_Types unit");
5505 if Ekind (Nm) = E_Procedure
5506 and then Nkind (Parent (Nm)) = N_Procedure_Specification
5508 if not Is_Remote_Call_Interface (Nm) then
5510 ("pragma% cannot be applied on non-remote procedure",
5514 L := Parameter_Specifications (Parent (Nm));
5515 Process_Async_Pragma;
5518 elsif Ekind (Nm) = E_Function then
5520 ("pragma% cannot be applied to function", Arg1);
5522 elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
5524 if Is_Record_Type (Nm) then
5526 -- A record type that is the Equivalent_Type for a remote
5527 -- access-to-subprogram type.
5529 N := Declaration_Node (Corresponding_Remote_Type (Nm));
5532 -- A non-expanded RAS type (distribution is not enabled)
5534 N := Declaration_Node (Nm);
5537 if Nkind (N) = N_Full_Type_Declaration
5538 and then Nkind (Type_Definition (N)) =
5539 N_Access_Procedure_Definition
5541 L := Parameter_Specifications (Type_Definition (N));
5542 Process_Async_Pragma;
5544 if Is_Asynchronous (Nm)
5545 and then Expander_Active
5546 and then Get_PCS_Name /= Name_No_DSA
5548 RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
5553 ("pragma% cannot reference access-to-function type",
5557 -- Only other possibility is Access-to-class-wide type
5559 elsif Is_Access_Type (Nm)
5560 and then Is_Class_Wide_Type (Designated_Type (Nm))
5562 Check_First_Subtype (Arg1);
5563 Set_Is_Asynchronous (Nm);
5564 if Expander_Active then
5565 RACW_Type_Is_Asynchronous (Nm);
5569 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
5577 -- pragma Atomic (LOCAL_NAME);
5579 when Pragma_Atomic =>
5580 Process_Atomic_Shared_Volatile;
5582 -----------------------
5583 -- Atomic_Components --
5584 -----------------------
5586 -- pragma Atomic_Components (array_LOCAL_NAME);
5588 -- This processing is shared by Volatile_Components
5590 when Pragma_Atomic_Components |
5591 Pragma_Volatile_Components =>
5593 Atomic_Components : declare
5600 Check_Ada_83_Warning;
5601 Check_No_Identifiers;
5602 Check_Arg_Count (1);
5603 Check_Arg_Is_Local_Name (Arg1);
5604 E_Id := Expression (Arg1);
5606 if Etype (E_Id) = Any_Type then
5612 if Rep_Item_Too_Early (E, N)
5614 Rep_Item_Too_Late (E, N)
5619 D := Declaration_Node (E);
5622 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
5624 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
5625 and then Nkind (D) = N_Object_Declaration
5626 and then Nkind (Object_Definition (D)) =
5627 N_Constrained_Array_Definition)
5629 -- The flag is set on the object, or on the base type
5631 if Nkind (D) /= N_Object_Declaration then
5635 Set_Has_Volatile_Components (E);
5637 if Prag_Id = Pragma_Atomic_Components then
5638 Set_Has_Atomic_Components (E);
5640 if Is_Packed (E) then
5641 Set_Is_Packed (E, False);
5644 ("?Pack canceled, cannot pack atomic components",
5650 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
5652 end Atomic_Components;
5654 --------------------
5655 -- Attach_Handler --
5656 --------------------
5658 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
5660 when Pragma_Attach_Handler =>
5661 Check_Ada_83_Warning;
5662 Check_No_Identifiers;
5663 Check_Arg_Count (2);
5665 if No_Run_Time_Mode then
5666 Error_Msg_CRT ("Attach_Handler pragma", N);
5668 Check_Interrupt_Or_Attach_Handler;
5670 -- The expression that designates the attribute may
5671 -- depend on a discriminant, and is therefore a per-
5672 -- object expression, to be expanded in the init proc.
5673 -- If expansion is enabled, perform semantic checks
5676 if Expander_Active then
5678 Temp : constant Node_Id :=
5679 New_Copy_Tree (Expression (Arg2));
5681 Set_Parent (Temp, N);
5682 Preanalyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
5686 Analyze (Expression (Arg2));
5687 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
5690 Process_Interrupt_Or_Attach_Handler;
5693 --------------------
5694 -- C_Pass_By_Copy --
5695 --------------------
5697 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
5699 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
5705 Check_Valid_Configuration_Pragma;
5706 Check_Arg_Count (1);
5707 Check_Optional_Identifier (Arg1, "max_size");
5709 Arg := Expression (Arg1);
5710 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
5712 Val := Expr_Value (Arg);
5716 ("maximum size for pragma% must be positive", Arg1);
5718 elsif UI_Is_In_Int_Range (Val) then
5719 Default_C_Record_Mechanism := UI_To_Int (Val);
5721 -- If a giant value is given, Int'Last will do well enough.
5722 -- If sometime someone complains that a record larger than
5723 -- two gigabytes is not copied, we will worry about it then!
5726 Default_C_Record_Mechanism := Mechanism_Type'Last;
5734 -- pragma Check ([Name =>] Identifier,
5735 -- [Check =>] Boolean_Expression
5736 -- [,[Message =>] String_Expression]);
5738 when Pragma_Check => Check : declare
5743 -- Set True if category of assertions referenced by Name enabled
5747 Check_At_Least_N_Arguments (2);
5748 Check_At_Most_N_Arguments (3);
5749 Check_Optional_Identifier (Arg1, Name_Name);
5750 Check_Optional_Identifier (Arg2, Name_Check);
5752 if Arg_Count = 3 then
5753 Check_Optional_Identifier (Arg3, Name_Message);
5754 Analyze_And_Resolve (Get_Pragma_Arg (Arg3), Standard_String);
5757 Check_Arg_Is_Identifier (Arg1);
5758 Check_On := Check_Enabled (Chars (Get_Pragma_Arg (Arg1)));
5760 -- If expansion is active and the check is not enabled then we
5761 -- rewrite the Check as:
5763 -- if False and then condition then
5767 -- The reason we do this rewriting during semantic analysis rather
5768 -- than as part of normal expansion is that we cannot analyze and
5769 -- expand the code for the boolean expression directly, or it may
5770 -- cause insertion of actions that would escape the attempt to
5771 -- suppress the check code.
5773 -- Note that the Sloc for the if statement corresponds to the
5774 -- argument condition, not the pragma itself. The reason for this
5775 -- is that we may generate a warning if the condition is False at
5776 -- compile time, and we do not want to delete this warning when we
5777 -- delete the if statement.
5779 Expr := Expression (Arg2);
5781 if Expander_Active and then not Check_On then
5782 Eloc := Sloc (Expr);
5785 Make_If_Statement (Eloc,
5787 Make_And_Then (Eloc,
5788 Left_Opnd => New_Occurrence_Of (Standard_False, Eloc),
5789 Right_Opnd => Expr),
5790 Then_Statements => New_List (
5791 Make_Null_Statement (Eloc))));
5798 Analyze_And_Resolve (Expr, Any_Boolean);
5806 -- pragma Check_Name (check_IDENTIFIER);
5808 when Pragma_Check_Name =>
5809 Check_No_Identifiers;
5811 Check_Valid_Configuration_Pragma;
5812 Check_Arg_Count (1);
5813 Check_Arg_Is_Identifier (Arg1);
5816 Nam : constant Name_Id := Chars (Expression (Arg1));
5819 for J in Check_Names.First .. Check_Names.Last loop
5820 if Check_Names.Table (J) = Nam then
5825 Check_Names.Append (Nam);
5832 -- pragma Check_Policy (
5833 -- [Name =>] IDENTIFIER,
5834 -- [Policy =>] POLICY_IDENTIFIER);
5836 -- POLICY_IDENTIFIER ::= ON | OFF | CHECK | IGNORE
5838 -- Note: this is a configuration pragma, but it is allowed to appear
5841 when Pragma_Check_Policy =>
5843 Check_Arg_Count (2);
5844 Check_Optional_Identifier (Arg1, Name_Name);
5845 Check_Optional_Identifier (Arg2, Name_Policy);
5847 (Arg2, Name_On, Name_Off, Name_Check, Name_Ignore);
5849 -- A Check_Policy pragma can appear either as a configuration
5850 -- pragma, or in a declarative part or a package spec (see RM
5851 -- 11.5(5) for rules for Suppress/Unsuppress which are also
5852 -- followed for Check_Policy).
5854 if not Is_Configuration_Pragma then
5855 Check_Is_In_Decl_Part_Or_Package_Spec;
5858 Set_Next_Pragma (N, Opt.Check_Policy_List);
5859 Opt.Check_Policy_List := N;
5861 ---------------------
5862 -- CIL_Constructor --
5863 ---------------------
5865 -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME);
5867 -- Processing for this pragma is shared with Java_Constructor
5873 -- pragma Comment (static_string_EXPRESSION)
5875 -- Processing for pragma Comment shares the circuitry for pragma
5876 -- Ident. The only differences are that Ident enforces a limit of 31
5877 -- characters on its argument, and also enforces limitations on
5878 -- placement for DEC compatibility. Pragma Comment shares neither of
5879 -- these restrictions.
5885 -- pragma Common_Object (
5886 -- [Internal =>] LOCAL_NAME
5887 -- [, [External =>] EXTERNAL_SYMBOL]
5888 -- [, [Size =>] EXTERNAL_SYMBOL]);
5890 -- Processing for this pragma is shared with Psect_Object
5892 ------------------------
5893 -- Compile_Time_Error --
5894 ------------------------
5896 -- pragma Compile_Time_Error
5897 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5899 when Pragma_Compile_Time_Error =>
5901 Process_Compile_Time_Warning_Or_Error;
5903 --------------------------
5904 -- Compile_Time_Warning --
5905 --------------------------
5907 -- pragma Compile_Time_Warning
5908 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5910 when Pragma_Compile_Time_Warning =>
5912 Process_Compile_Time_Warning_Or_Error;
5918 when Pragma_Compiler_Unit =>
5920 Check_Arg_Count (0);
5921 Set_Is_Compiler_Unit (Get_Source_Unit (N));
5923 -----------------------------
5924 -- Complete_Representation --
5925 -----------------------------
5927 -- pragma Complete_Representation;
5929 when Pragma_Complete_Representation =>
5931 Check_Arg_Count (0);
5933 if Nkind (Parent (N)) /= N_Record_Representation_Clause then
5935 ("pragma & must appear within record representation clause");
5938 ----------------------------
5939 -- Complex_Representation --
5940 ----------------------------
5942 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
5944 when Pragma_Complex_Representation => Complex_Representation : declare
5951 Check_Arg_Count (1);
5952 Check_Optional_Identifier (Arg1, Name_Entity);
5953 Check_Arg_Is_Local_Name (Arg1);
5954 E_Id := Expression (Arg1);
5956 if Etype (E_Id) = Any_Type then
5962 if not Is_Record_Type (E) then
5964 ("argument for pragma% must be record type", Arg1);
5967 Ent := First_Entity (E);
5970 or else No (Next_Entity (Ent))
5971 or else Present (Next_Entity (Next_Entity (Ent)))
5972 or else not Is_Floating_Point_Type (Etype (Ent))
5973 or else Etype (Ent) /= Etype (Next_Entity (Ent))
5976 ("record for pragma% must have two fields of the same "
5977 & "floating-point type", Arg1);
5980 Set_Has_Complex_Representation (Base_Type (E));
5982 -- We need to treat the type has having a non-standard
5983 -- representation, for back-end purposes, even though in
5984 -- general a complex will have the default representation
5985 -- of a record with two real components.
5987 Set_Has_Non_Standard_Rep (Base_Type (E));
5989 end Complex_Representation;
5991 -------------------------
5992 -- Component_Alignment --
5993 -------------------------
5995 -- pragma Component_Alignment (
5996 -- [Form =>] ALIGNMENT_CHOICE
5997 -- [, [Name =>] type_LOCAL_NAME]);
5999 -- ALIGNMENT_CHOICE ::=
6001 -- | Component_Size_4
6005 when Pragma_Component_Alignment => Component_AlignmentP : declare
6006 Args : Args_List (1 .. 2);
6007 Names : constant Name_List (1 .. 2) := (
6011 Form : Node_Id renames Args (1);
6012 Name : Node_Id renames Args (2);
6014 Atype : Component_Alignment_Kind;
6019 Gather_Associations (Names, Args);
6022 Error_Pragma ("missing Form argument for pragma%");
6025 Check_Arg_Is_Identifier (Form);
6027 -- Get proper alignment, note that Default = Component_Size on all
6028 -- machines we have so far, and we want to set this value rather
6029 -- than the default value to indicate that it has been explicitly
6030 -- set (and thus will not get overridden by the default component
6031 -- alignment for the current scope)
6033 if Chars (Form) = Name_Component_Size then
6034 Atype := Calign_Component_Size;
6036 elsif Chars (Form) = Name_Component_Size_4 then
6037 Atype := Calign_Component_Size_4;
6039 elsif Chars (Form) = Name_Default then
6040 Atype := Calign_Component_Size;
6042 elsif Chars (Form) = Name_Storage_Unit then
6043 Atype := Calign_Storage_Unit;
6047 ("invalid Form parameter for pragma%", Form);
6050 -- Case with no name, supplied, affects scope table entry
6054 (Scope_Stack.Last).Component_Alignment_Default := Atype;
6056 -- Case of name supplied
6059 Check_Arg_Is_Local_Name (Name);
6061 Typ := Entity (Name);
6064 or else Rep_Item_Too_Early (Typ, N)
6068 Typ := Underlying_Type (Typ);
6071 if not Is_Record_Type (Typ)
6072 and then not Is_Array_Type (Typ)
6075 ("Name parameter of pragma% must identify record or " &
6076 "array type", Name);
6079 -- An explicit Component_Alignment pragma overrides an
6080 -- implicit pragma Pack, but not an explicit one.
6082 if not Has_Pragma_Pack (Base_Type (Typ)) then
6083 Set_Is_Packed (Base_Type (Typ), False);
6084 Set_Component_Alignment (Base_Type (Typ), Atype);
6087 end Component_AlignmentP;
6093 -- pragma Controlled (first_subtype_LOCAL_NAME);
6095 when Pragma_Controlled => Controlled : declare
6099 Check_No_Identifiers;
6100 Check_Arg_Count (1);
6101 Check_Arg_Is_Local_Name (Arg1);
6102 Arg := Expression (Arg1);
6104 if not Is_Entity_Name (Arg)
6105 or else not Is_Access_Type (Entity (Arg))
6107 Error_Pragma_Arg ("pragma% requires access type", Arg1);
6109 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
6117 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
6118 -- [Entity =>] LOCAL_NAME);
6120 when Pragma_Convention => Convention : declare
6123 pragma Warnings (Off, C);
6124 pragma Warnings (Off, E);
6126 Check_Arg_Order ((Name_Convention, Name_Entity));
6127 Check_Ada_83_Warning;
6128 Check_Arg_Count (2);
6129 Process_Convention (C, E);
6132 ---------------------------
6133 -- Convention_Identifier --
6134 ---------------------------
6136 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
6137 -- [Convention =>] convention_IDENTIFIER);
6139 when Pragma_Convention_Identifier => Convention_Identifier : declare
6145 Check_Arg_Order ((Name_Name, Name_Convention));
6146 Check_Arg_Count (2);
6147 Check_Optional_Identifier (Arg1, Name_Name);
6148 Check_Optional_Identifier (Arg2, Name_Convention);
6149 Check_Arg_Is_Identifier (Arg1);
6150 Check_Arg_Is_Identifier (Arg2);
6151 Idnam := Chars (Expression (Arg1));
6152 Cname := Chars (Expression (Arg2));
6154 if Is_Convention_Name (Cname) then
6155 Record_Convention_Identifier
6156 (Idnam, Get_Convention_Id (Cname));
6159 ("second arg for % pragma must be convention", Arg2);
6161 end Convention_Identifier;
6167 -- pragma CPP_Class ([Entity =>] local_NAME)
6169 when Pragma_CPP_Class => CPP_Class : declare
6174 if Warn_On_Obsolescent_Feature then
6176 ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" &
6177 " by pragma import?", N);
6181 Check_Arg_Count (1);
6182 Check_Optional_Identifier (Arg1, Name_Entity);
6183 Check_Arg_Is_Local_Name (Arg1);
6185 Arg := Expression (Arg1);
6188 if Etype (Arg) = Any_Type then
6192 if not Is_Entity_Name (Arg)
6193 or else not Is_Type (Entity (Arg))
6195 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6198 Typ := Entity (Arg);
6200 if not Is_Tagged_Type (Typ) then
6201 Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1);
6204 -- Types treated as CPP classes are treated as limited, but we
6205 -- don't require them to be declared this way. A warning is issued
6206 -- to encourage the user to declare them as limited. This is not
6207 -- an error, for compatibility reasons, because these types have
6208 -- been supported this way for some time.
6210 if not Is_Limited_Type (Typ) then
6212 ("imported 'C'P'P type should be " &
6213 "explicitly declared limited?",
6214 Get_Pragma_Arg (Arg1));
6216 ("\type will be considered limited",
6217 Get_Pragma_Arg (Arg1));
6220 Set_Is_CPP_Class (Typ);
6221 Set_Is_Limited_Record (Typ);
6222 Set_Convention (Typ, Convention_CPP);
6224 -- Imported CPP types must not have discriminants (because C++
6225 -- classes do not have discriminants).
6227 if Has_Discriminants (Typ) then
6229 ("imported 'C'P'P type cannot have discriminants",
6230 First (Discriminant_Specifications
6231 (Declaration_Node (Typ))));
6234 -- Components of imported CPP types must not have default
6235 -- expressions because the constructor (if any) is in the
6238 if Is_Incomplete_Or_Private_Type (Typ)
6239 and then No (Underlying_Type (Typ))
6241 -- It should be an error to apply pragma CPP to a private
6242 -- type if the underlying type is not visible (as it is
6243 -- for any representation item). For now, for backward
6244 -- compatibility we do nothing but we cannot check components
6245 -- because they are not available at this stage. All this code
6246 -- will be removed when we cleanup this obsolete GNAT pragma???
6252 Tdef : constant Node_Id :=
6253 Type_Definition (Declaration_Node (Typ));
6258 if Nkind (Tdef) = N_Record_Definition then
6259 Clist := Component_List (Tdef);
6261 pragma Assert (Nkind (Tdef) = N_Derived_Type_Definition);
6262 Clist := Component_List (Record_Extension_Part (Tdef));
6265 if Present (Clist) then
6266 Comp := First (Component_Items (Clist));
6267 while Present (Comp) loop
6268 if Present (Expression (Comp)) then
6270 ("component of imported 'C'P'P type cannot have" &
6271 " default expression", Expression (Comp));
6281 ---------------------
6282 -- CPP_Constructor --
6283 ---------------------
6285 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME
6286 -- [, [External_Name =>] static_string_EXPRESSION ]
6287 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6289 when Pragma_CPP_Constructor => CPP_Constructor : declare
6293 Tag_Typ : Entity_Id;
6297 Check_At_Least_N_Arguments (1);
6298 Check_At_Most_N_Arguments (3);
6299 Check_Optional_Identifier (Arg1, Name_Entity);
6300 Check_Arg_Is_Local_Name (Arg1);
6302 Id := Expression (Arg1);
6303 Find_Program_Unit_Name (Id);
6305 -- If we did not find the name, we are done
6307 if Etype (Id) = Any_Type then
6311 Def_Id := Entity (Id);
6313 if Ekind (Def_Id) = E_Function
6314 and then (Is_CPP_Class (Etype (Def_Id))
6315 or else (Is_Class_Wide_Type (Etype (Def_Id))
6317 Is_CPP_Class (Root_Type (Etype (Def_Id)))))
6319 if Arg_Count >= 2 then
6320 Set_Imported (Def_Id);
6321 Set_Is_Public (Def_Id);
6322 Process_Interface_Name (Def_Id, Arg2, Arg3);
6325 Set_Has_Completion (Def_Id);
6326 Set_Is_Constructor (Def_Id);
6328 -- Imported C++ constructors are not dispatching primitives
6329 -- because in C++ they don't have a dispatch table slot.
6330 -- However, in Ada the constructor has the profile of a
6331 -- function that returns a tagged type and therefore it has
6332 -- been treated as a primitive operation during semantic
6333 -- analysis. We now remove it from the list of primitive
6334 -- operations of the type.
6336 if Is_Tagged_Type (Etype (Def_Id))
6337 and then not Is_Class_Wide_Type (Etype (Def_Id))
6339 pragma Assert (Is_Dispatching_Operation (Def_Id));
6340 Tag_Typ := Etype (Def_Id);
6342 Elmt := First_Elmt (Primitive_Operations (Tag_Typ));
6343 while Present (Elmt) and then Node (Elmt) /= Def_Id loop
6347 Remove_Elmt (Primitive_Operations (Tag_Typ), Elmt);
6348 Set_Is_Dispatching_Operation (Def_Id, False);
6351 -- For backward compatibility, if the constructor returns a
6352 -- class wide type, and we internally change the return type to
6353 -- the corresponding root type.
6355 if Is_Class_Wide_Type (Etype (Def_Id)) then
6356 Set_Etype (Def_Id, Root_Type (Etype (Def_Id)));
6360 ("pragma% requires function returning a 'C'P'P_Class type",
6363 end CPP_Constructor;
6369 when Pragma_CPP_Virtual => CPP_Virtual : declare
6373 if Warn_On_Obsolescent_Feature then
6375 ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " &
6384 when Pragma_CPP_Vtable => CPP_Vtable : declare
6388 if Warn_On_Obsolescent_Feature then
6390 ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " &
6399 -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
6401 when Pragma_Debug => Debug : declare
6409 (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
6412 if Arg_Count = 2 then
6415 Left_Opnd => Relocate_Node (Cond),
6416 Right_Opnd => Expression (Arg1));
6419 -- Rewrite into a conditional with an appropriate condition. We
6420 -- wrap the procedure call in a block so that overhead from e.g.
6421 -- use of the secondary stack does not generate execution overhead
6422 -- for suppressed conditions.
6424 Rewrite (N, Make_Implicit_If_Statement (N,
6426 Then_Statements => New_List (
6427 Make_Block_Statement (Loc,
6428 Handled_Statement_Sequence =>
6429 Make_Handled_Sequence_Of_Statements (Loc,
6430 Statements => New_List (
6431 Relocate_Node (Debug_Statement (N))))))));
6439 -- pragma Debug_Policy (Check | Ignore)
6441 when Pragma_Debug_Policy =>
6443 Check_Arg_Count (1);
6444 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
6445 Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
6447 ---------------------
6448 -- Detect_Blocking --
6449 ---------------------
6451 -- pragma Detect_Blocking;
6453 when Pragma_Detect_Blocking =>
6455 Check_Arg_Count (0);
6456 Check_Valid_Configuration_Pragma;
6457 Detect_Blocking := True;
6463 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
6465 when Pragma_Discard_Names => Discard_Names : declare
6470 Check_Ada_83_Warning;
6472 -- Deal with configuration pragma case
6474 if Arg_Count = 0 and then Is_Configuration_Pragma then
6475 Global_Discard_Names := True;
6478 -- Otherwise, check correct appropriate context
6481 Check_Is_In_Decl_Part_Or_Package_Spec;
6483 if Arg_Count = 0 then
6485 -- If there is no parameter, then from now on this pragma
6486 -- applies to any enumeration, exception or tagged type
6487 -- defined in the current declarative part, and recursively
6488 -- to any nested scope.
6490 Set_Discard_Names (Current_Scope);
6494 Check_Arg_Count (1);
6495 Check_Optional_Identifier (Arg1, Name_On);
6496 Check_Arg_Is_Local_Name (Arg1);
6498 E_Id := Expression (Arg1);
6500 if Etype (E_Id) = Any_Type then
6506 if (Is_First_Subtype (E)
6508 (Is_Enumeration_Type (E) or else Is_Tagged_Type (E)))
6509 or else Ekind (E) = E_Exception
6511 Set_Discard_Names (E);
6514 ("inappropriate entity for pragma%", Arg1);
6525 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
6527 when Pragma_Elaborate => Elaborate : declare
6532 -- Pragma must be in context items list of a compilation unit
6534 if not Is_In_Context_Clause then
6538 -- Must be at least one argument
6540 if Arg_Count = 0 then
6541 Error_Pragma ("pragma% requires at least one argument");
6544 -- In Ada 83 mode, there can be no items following it in the
6545 -- context list except other pragmas and implicit with clauses
6546 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
6547 -- placement rule does not apply.
6549 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
6551 while Present (Citem) loop
6552 if Nkind (Citem) = N_Pragma
6553 or else (Nkind (Citem) = N_With_Clause
6554 and then Implicit_With (Citem))
6559 ("(Ada 83) pragma% must be at end of context clause");
6566 -- Finally, the arguments must all be units mentioned in a with
6567 -- clause in the same context clause. Note we already checked (in
6568 -- Par.Prag) that the arguments are all identifiers or selected
6572 Outer : while Present (Arg) loop
6573 Citem := First (List_Containing (N));
6574 Inner : while Citem /= N loop
6575 if Nkind (Citem) = N_With_Clause
6576 and then Same_Name (Name (Citem), Expression (Arg))
6578 Set_Elaborate_Present (Citem, True);
6579 Set_Unit_Name (Expression (Arg), Name (Citem));
6581 -- With the pragma present, elaboration calls on
6582 -- subprograms from the named unit need no further
6583 -- checks, as long as the pragma appears in the current
6584 -- compilation unit. If the pragma appears in some unit
6585 -- in the context, there might still be a need for an
6586 -- Elaborate_All_Desirable from the current compilation
6587 -- to the named unit, so we keep the check enabled.
6589 if In_Extended_Main_Source_Unit (N) then
6590 Set_Suppress_Elaboration_Warnings
6591 (Entity (Name (Citem)));
6602 ("argument of pragma% is not with'ed unit", Arg);
6608 -- Give a warning if operating in static mode with -gnatwl
6609 -- (elaboration warnings enabled) switch set.
6611 if Elab_Warnings and not Dynamic_Elaboration_Checks then
6613 ("?use of pragma Elaborate may not be safe", N);
6615 ("?use pragma Elaborate_All instead if possible", N);
6623 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
6625 when Pragma_Elaborate_All => Elaborate_All : declare
6630 Check_Ada_83_Warning;
6632 -- Pragma must be in context items list of a compilation unit
6634 if not Is_In_Context_Clause then
6638 -- Must be at least one argument
6640 if Arg_Count = 0 then
6641 Error_Pragma ("pragma% requires at least one argument");
6644 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
6645 -- have to appear at the end of the context clause, but may
6646 -- appear mixed in with other items, even in Ada 83 mode.
6648 -- Final check: the arguments must all be units mentioned in
6649 -- a with clause in the same context clause. Note that we
6650 -- already checked (in Par.Prag) that all the arguments are
6651 -- either identifiers or selected components.
6654 Outr : while Present (Arg) loop
6655 Citem := First (List_Containing (N));
6656 Innr : while Citem /= N loop
6657 if Nkind (Citem) = N_With_Clause
6658 and then Same_Name (Name (Citem), Expression (Arg))
6660 Set_Elaborate_All_Present (Citem, True);
6661 Set_Unit_Name (Expression (Arg), Name (Citem));
6663 -- Suppress warnings and elaboration checks on the named
6664 -- unit if the pragma is in the current compilation, as
6665 -- for pragma Elaborate.
6667 if In_Extended_Main_Source_Unit (N) then
6668 Set_Suppress_Elaboration_Warnings
6669 (Entity (Name (Citem)));
6678 Set_Error_Posted (N);
6680 ("argument of pragma% is not with'ed unit", Arg);
6687 --------------------
6688 -- Elaborate_Body --
6689 --------------------
6691 -- pragma Elaborate_Body [( library_unit_NAME )];
6693 when Pragma_Elaborate_Body => Elaborate_Body : declare
6694 Cunit_Node : Node_Id;
6695 Cunit_Ent : Entity_Id;
6698 Check_Ada_83_Warning;
6699 Check_Valid_Library_Unit_Pragma;
6701 if Nkind (N) = N_Null_Statement then
6705 Cunit_Node := Cunit (Current_Sem_Unit);
6706 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
6708 if Nkind_In (Unit (Cunit_Node), N_Package_Body,
6711 Error_Pragma ("pragma% must refer to a spec, not a body");
6713 Set_Body_Required (Cunit_Node, True);
6714 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
6716 -- If we are in dynamic elaboration mode, then we suppress
6717 -- elaboration warnings for the unit, since it is definitely
6718 -- fine NOT to do dynamic checks at the first level (and such
6719 -- checks will be suppressed because no elaboration boolean
6720 -- is created for Elaborate_Body packages).
6722 -- But in the static model of elaboration, Elaborate_Body is
6723 -- definitely NOT good enough to ensure elaboration safety on
6724 -- its own, since the body may WITH other units that are not
6725 -- safe from an elaboration point of view, so a client must
6726 -- still do an Elaborate_All on such units.
6728 -- Debug flag -gnatdD restores the old behavior of 3.13, where
6729 -- Elaborate_Body always suppressed elab warnings.
6731 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
6732 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
6737 ------------------------
6738 -- Elaboration_Checks --
6739 ------------------------
6741 -- pragma Elaboration_Checks (Static | Dynamic);
6743 when Pragma_Elaboration_Checks =>
6745 Check_Arg_Count (1);
6746 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
6747 Dynamic_Elaboration_Checks :=
6748 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
6754 -- pragma Eliminate (
6755 -- [Unit_Name =>] IDENTIFIER | SELECTED_COMPONENT,
6756 -- [,[Entity =>] IDENTIFIER |
6757 -- SELECTED_COMPONENT |
6759 -- [, OVERLOADING_RESOLUTION]);
6761 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
6764 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
6767 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
6769 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
6770 -- Result_Type => result_SUBTYPE_NAME]
6772 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
6773 -- SUBTYPE_NAME ::= STRING_LITERAL
6775 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
6776 -- SOURCE_TRACE ::= STRING_LITERAL
6778 when Pragma_Eliminate => Eliminate : declare
6779 Args : Args_List (1 .. 5);
6780 Names : constant Name_List (1 .. 5) := (
6783 Name_Parameter_Types,
6785 Name_Source_Location);
6787 Unit_Name : Node_Id renames Args (1);
6788 Entity : Node_Id renames Args (2);
6789 Parameter_Types : Node_Id renames Args (3);
6790 Result_Type : Node_Id renames Args (4);
6791 Source_Location : Node_Id renames Args (5);
6795 Check_Valid_Configuration_Pragma;
6796 Gather_Associations (Names, Args);
6798 if No (Unit_Name) then
6799 Error_Pragma ("missing Unit_Name argument for pragma%");
6803 and then (Present (Parameter_Types)
6805 Present (Result_Type)
6807 Present (Source_Location))
6809 Error_Pragma ("missing Entity argument for pragma%");
6812 if (Present (Parameter_Types)
6814 Present (Result_Type))
6816 Present (Source_Location)
6819 ("parameter profile and source location cannot " &
6820 "be used together in pragma%");
6823 Process_Eliminate_Pragma
6837 -- [ Convention =>] convention_IDENTIFIER,
6838 -- [ Entity =>] local_NAME
6839 -- [, [External_Name =>] static_string_EXPRESSION ]
6840 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6842 when Pragma_Export => Export : declare
6846 pragma Warnings (Off, C);
6849 Check_Ada_83_Warning;
6855 Check_At_Least_N_Arguments (2);
6856 Check_At_Most_N_Arguments (4);
6857 Process_Convention (C, Def_Id);
6859 if Ekind (Def_Id) /= E_Constant then
6860 Note_Possible_Modification (Expression (Arg2), Sure => False);
6863 Process_Interface_Name (Def_Id, Arg3, Arg4);
6864 Set_Exported (Def_Id, Arg2);
6866 -- If the entity is a deferred constant, propagate the information
6867 -- to the full view, because gigi elaborates the full view only.
6869 if Ekind (Def_Id) = E_Constant
6870 and then Present (Full_View (Def_Id))
6873 Id2 : constant Entity_Id := Full_View (Def_Id);
6875 Set_Is_Exported (Id2, Is_Exported (Def_Id));
6876 Set_First_Rep_Item (Id2, First_Rep_Item (Def_Id));
6877 Set_Interface_Name (Id2, Einfo.Interface_Name (Def_Id));
6882 ----------------------
6883 -- Export_Exception --
6884 ----------------------
6886 -- pragma Export_Exception (
6887 -- [Internal =>] LOCAL_NAME
6888 -- [, [External =>] EXTERNAL_SYMBOL]
6889 -- [, [Form =>] Ada | VMS]
6890 -- [, [Code =>] static_integer_EXPRESSION]);
6892 when Pragma_Export_Exception => Export_Exception : declare
6893 Args : Args_List (1 .. 4);
6894 Names : constant Name_List (1 .. 4) := (
6900 Internal : Node_Id renames Args (1);
6901 External : Node_Id renames Args (2);
6902 Form : Node_Id renames Args (3);
6903 Code : Node_Id renames Args (4);
6908 if Inside_A_Generic then
6909 Error_Pragma ("pragma% cannot be used for generic entities");
6912 Gather_Associations (Names, Args);
6913 Process_Extended_Import_Export_Exception_Pragma (
6914 Arg_Internal => Internal,
6915 Arg_External => External,
6919 if not Is_VMS_Exception (Entity (Internal)) then
6920 Set_Exported (Entity (Internal), Internal);
6922 end Export_Exception;
6924 ---------------------
6925 -- Export_Function --
6926 ---------------------
6928 -- pragma Export_Function (
6929 -- [Internal =>] LOCAL_NAME
6930 -- [, [External =>] EXTERNAL_SYMBOL]
6931 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6932 -- [, [Result_Type =>] TYPE_DESIGNATOR]
6933 -- [, [Mechanism =>] MECHANISM]
6934 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
6936 -- EXTERNAL_SYMBOL ::=
6938 -- | static_string_EXPRESSION
6940 -- PARAMETER_TYPES ::=
6942 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6944 -- TYPE_DESIGNATOR ::=
6946 -- | subtype_Name ' Access
6950 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6952 -- MECHANISM_ASSOCIATION ::=
6953 -- [formal_parameter_NAME =>] MECHANISM_NAME
6955 -- MECHANISM_NAME ::=
6958 -- | Descriptor [([Class =>] CLASS_NAME)]
6960 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6962 when Pragma_Export_Function => Export_Function : declare
6963 Args : Args_List (1 .. 6);
6964 Names : constant Name_List (1 .. 6) := (
6967 Name_Parameter_Types,
6970 Name_Result_Mechanism);
6972 Internal : Node_Id renames Args (1);
6973 External : Node_Id renames Args (2);
6974 Parameter_Types : Node_Id renames Args (3);
6975 Result_Type : Node_Id renames Args (4);
6976 Mechanism : Node_Id renames Args (5);
6977 Result_Mechanism : Node_Id renames Args (6);
6981 Gather_Associations (Names, Args);
6982 Process_Extended_Import_Export_Subprogram_Pragma (
6983 Arg_Internal => Internal,
6984 Arg_External => External,
6985 Arg_Parameter_Types => Parameter_Types,
6986 Arg_Result_Type => Result_Type,
6987 Arg_Mechanism => Mechanism,
6988 Arg_Result_Mechanism => Result_Mechanism);
6989 end Export_Function;
6995 -- pragma Export_Object (
6996 -- [Internal =>] LOCAL_NAME
6997 -- [, [External =>] EXTERNAL_SYMBOL]
6998 -- [, [Size =>] EXTERNAL_SYMBOL]);
7000 -- EXTERNAL_SYMBOL ::=
7002 -- | static_string_EXPRESSION
7004 -- PARAMETER_TYPES ::=
7006 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7008 -- TYPE_DESIGNATOR ::=
7010 -- | subtype_Name ' Access
7014 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7016 -- MECHANISM_ASSOCIATION ::=
7017 -- [formal_parameter_NAME =>] MECHANISM_NAME
7019 -- MECHANISM_NAME ::=
7022 -- | Descriptor [([Class =>] CLASS_NAME)]
7024 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7026 when Pragma_Export_Object => Export_Object : declare
7027 Args : Args_List (1 .. 3);
7028 Names : constant Name_List (1 .. 3) := (
7033 Internal : Node_Id renames Args (1);
7034 External : Node_Id renames Args (2);
7035 Size : Node_Id renames Args (3);
7039 Gather_Associations (Names, Args);
7040 Process_Extended_Import_Export_Object_Pragma (
7041 Arg_Internal => Internal,
7042 Arg_External => External,
7046 ----------------------
7047 -- Export_Procedure --
7048 ----------------------
7050 -- pragma Export_Procedure (
7051 -- [Internal =>] LOCAL_NAME
7052 -- [, [External =>] EXTERNAL_SYMBOL]
7053 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7054 -- [, [Mechanism =>] MECHANISM]);
7056 -- EXTERNAL_SYMBOL ::=
7058 -- | static_string_EXPRESSION
7060 -- PARAMETER_TYPES ::=
7062 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7064 -- TYPE_DESIGNATOR ::=
7066 -- | subtype_Name ' Access
7070 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7072 -- MECHANISM_ASSOCIATION ::=
7073 -- [formal_parameter_NAME =>] MECHANISM_NAME
7075 -- MECHANISM_NAME ::=
7078 -- | Descriptor [([Class =>] CLASS_NAME)]
7080 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7082 when Pragma_Export_Procedure => Export_Procedure : declare
7083 Args : Args_List (1 .. 4);
7084 Names : constant Name_List (1 .. 4) := (
7087 Name_Parameter_Types,
7090 Internal : Node_Id renames Args (1);
7091 External : Node_Id renames Args (2);
7092 Parameter_Types : Node_Id renames Args (3);
7093 Mechanism : Node_Id renames Args (4);
7097 Gather_Associations (Names, Args);
7098 Process_Extended_Import_Export_Subprogram_Pragma (
7099 Arg_Internal => Internal,
7100 Arg_External => External,
7101 Arg_Parameter_Types => Parameter_Types,
7102 Arg_Mechanism => Mechanism);
7103 end Export_Procedure;
7109 -- pragma Export_Value (
7110 -- [Value =>] static_integer_EXPRESSION,
7111 -- [Link_Name =>] static_string_EXPRESSION);
7113 when Pragma_Export_Value =>
7115 Check_Arg_Order ((Name_Value, Name_Link_Name));
7116 Check_Arg_Count (2);
7118 Check_Optional_Identifier (Arg1, Name_Value);
7119 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
7121 Check_Optional_Identifier (Arg2, Name_Link_Name);
7122 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7124 -----------------------------
7125 -- Export_Valued_Procedure --
7126 -----------------------------
7128 -- pragma Export_Valued_Procedure (
7129 -- [Internal =>] LOCAL_NAME
7130 -- [, [External =>] EXTERNAL_SYMBOL,]
7131 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7132 -- [, [Mechanism =>] MECHANISM]);
7134 -- EXTERNAL_SYMBOL ::=
7136 -- | static_string_EXPRESSION
7138 -- PARAMETER_TYPES ::=
7140 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7142 -- TYPE_DESIGNATOR ::=
7144 -- | subtype_Name ' Access
7148 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7150 -- MECHANISM_ASSOCIATION ::=
7151 -- [formal_parameter_NAME =>] MECHANISM_NAME
7153 -- MECHANISM_NAME ::=
7156 -- | Descriptor [([Class =>] CLASS_NAME)]
7158 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7160 when Pragma_Export_Valued_Procedure =>
7161 Export_Valued_Procedure : declare
7162 Args : Args_List (1 .. 4);
7163 Names : constant Name_List (1 .. 4) := (
7166 Name_Parameter_Types,
7169 Internal : Node_Id renames Args (1);
7170 External : Node_Id renames Args (2);
7171 Parameter_Types : Node_Id renames Args (3);
7172 Mechanism : Node_Id renames Args (4);
7176 Gather_Associations (Names, Args);
7177 Process_Extended_Import_Export_Subprogram_Pragma (
7178 Arg_Internal => Internal,
7179 Arg_External => External,
7180 Arg_Parameter_Types => Parameter_Types,
7181 Arg_Mechanism => Mechanism);
7182 end Export_Valued_Procedure;
7188 -- pragma Extend_System ([Name =>] Identifier);
7190 when Pragma_Extend_System => Extend_System : declare
7193 Check_Valid_Configuration_Pragma;
7194 Check_Arg_Count (1);
7195 Check_Optional_Identifier (Arg1, Name_Name);
7196 Check_Arg_Is_Identifier (Arg1);
7198 Get_Name_String (Chars (Expression (Arg1)));
7201 and then Name_Buffer (1 .. 4) = "aux_"
7203 if Present (System_Extend_Pragma_Arg) then
7204 if Chars (Expression (Arg1)) =
7205 Chars (Expression (System_Extend_Pragma_Arg))
7209 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
7210 Error_Pragma ("pragma% conflicts with that #");
7214 System_Extend_Pragma_Arg := Arg1;
7216 if not GNAT_Mode then
7217 System_Extend_Unit := Arg1;
7221 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
7225 ------------------------
7226 -- Extensions_Allowed --
7227 ------------------------
7229 -- pragma Extensions_Allowed (ON | OFF);
7231 when Pragma_Extensions_Allowed =>
7233 Check_Arg_Count (1);
7234 Check_No_Identifiers;
7235 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7237 if Chars (Expression (Arg1)) = Name_On then
7238 Extensions_Allowed := True;
7240 Extensions_Allowed := False;
7247 -- pragma External (
7248 -- [ Convention =>] convention_IDENTIFIER,
7249 -- [ Entity =>] local_NAME
7250 -- [, [External_Name =>] static_string_EXPRESSION ]
7251 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7253 when Pragma_External => External : declare
7257 pragma Warnings (Off, C);
7266 Check_At_Least_N_Arguments (2);
7267 Check_At_Most_N_Arguments (4);
7268 Process_Convention (C, Def_Id);
7269 Note_Possible_Modification (Expression (Arg2), Sure => False);
7270 Process_Interface_Name (Def_Id, Arg3, Arg4);
7271 Set_Exported (Def_Id, Arg2);
7274 --------------------------
7275 -- External_Name_Casing --
7276 --------------------------
7278 -- pragma External_Name_Casing (
7279 -- UPPERCASE | LOWERCASE
7280 -- [, AS_IS | UPPERCASE | LOWERCASE]);
7282 when Pragma_External_Name_Casing => External_Name_Casing : declare
7285 Check_No_Identifiers;
7287 if Arg_Count = 2 then
7289 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
7291 case Chars (Get_Pragma_Arg (Arg2)) is
7293 Opt.External_Name_Exp_Casing := As_Is;
7295 when Name_Uppercase =>
7296 Opt.External_Name_Exp_Casing := Uppercase;
7298 when Name_Lowercase =>
7299 Opt.External_Name_Exp_Casing := Lowercase;
7306 Check_Arg_Count (1);
7309 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
7311 case Chars (Get_Pragma_Arg (Arg1)) is
7312 when Name_Uppercase =>
7313 Opt.External_Name_Imp_Casing := Uppercase;
7315 when Name_Lowercase =>
7316 Opt.External_Name_Imp_Casing := Lowercase;
7321 end External_Name_Casing;
7323 --------------------------
7324 -- Favor_Top_Level --
7325 --------------------------
7327 -- pragma Favor_Top_Level (type_NAME);
7329 when Pragma_Favor_Top_Level => Favor_Top_Level : declare
7330 Named_Entity : Entity_Id;
7334 Check_No_Identifiers;
7335 Check_Arg_Count (1);
7336 Check_Arg_Is_Local_Name (Arg1);
7337 Named_Entity := Entity (Expression (Arg1));
7339 -- If it's an access-to-subprogram type (in particular, not a
7340 -- subtype), set the flag on that type.
7342 if Is_Access_Subprogram_Type (Named_Entity) then
7343 Set_Can_Use_Internal_Rep (Named_Entity, False);
7345 -- Otherwise it's an error (name denotes the wrong sort of entity)
7349 ("access-to-subprogram type expected", Expression (Arg1));
7351 end Favor_Top_Level;
7357 -- pragma Fast_Math;
7359 when Pragma_Fast_Math =>
7361 Check_No_Identifiers;
7362 Check_Valid_Configuration_Pragma;
7365 ---------------------------
7366 -- Finalize_Storage_Only --
7367 ---------------------------
7369 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
7371 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
7372 Assoc : constant Node_Id := Arg1;
7373 Type_Id : constant Node_Id := Expression (Assoc);
7378 Check_No_Identifiers;
7379 Check_Arg_Count (1);
7380 Check_Arg_Is_Local_Name (Arg1);
7382 Find_Type (Type_Id);
7383 Typ := Entity (Type_Id);
7386 or else Rep_Item_Too_Early (Typ, N)
7390 Typ := Underlying_Type (Typ);
7393 if not Is_Controlled (Typ) then
7394 Error_Pragma ("pragma% must specify controlled type");
7397 Check_First_Subtype (Arg1);
7399 if Finalize_Storage_Only (Typ) then
7400 Error_Pragma ("duplicate pragma%, only one allowed");
7402 elsif not Rep_Item_Too_Late (Typ, N) then
7403 Set_Finalize_Storage_Only (Base_Type (Typ), True);
7405 end Finalize_Storage;
7407 --------------------------
7408 -- Float_Representation --
7409 --------------------------
7411 -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
7413 -- FLOAT_REP ::= VAX_Float | IEEE_Float
7415 when Pragma_Float_Representation => Float_Representation : declare
7423 if Arg_Count = 1 then
7424 Check_Valid_Configuration_Pragma;
7426 Check_Arg_Count (2);
7427 Check_Optional_Identifier (Arg2, Name_Entity);
7428 Check_Arg_Is_Local_Name (Arg2);
7431 Check_No_Identifier (Arg1);
7432 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
7434 if not OpenVMS_On_Target then
7435 if Chars (Expression (Arg1)) = Name_VAX_Float then
7437 ("?pragma% ignored (applies only to Open'V'M'S)");
7443 -- One argument case
7445 if Arg_Count = 1 then
7446 if Chars (Expression (Arg1)) = Name_VAX_Float then
7447 if Opt.Float_Format = 'I' then
7448 Error_Pragma ("'I'E'E'E format previously specified");
7451 Opt.Float_Format := 'V';
7454 if Opt.Float_Format = 'V' then
7455 Error_Pragma ("'V'A'X format previously specified");
7458 Opt.Float_Format := 'I';
7461 Set_Standard_Fpt_Formats;
7463 -- Two argument case
7466 Argx := Get_Pragma_Arg (Arg2);
7468 if not Is_Entity_Name (Argx)
7469 or else not Is_Floating_Point_Type (Entity (Argx))
7472 ("second argument of% pragma must be floating-point type",
7476 Ent := Entity (Argx);
7477 Digs := UI_To_Int (Digits_Value (Ent));
7479 -- Two arguments, VAX_Float case
7481 if Chars (Expression (Arg1)) = Name_VAX_Float then
7483 when 6 => Set_F_Float (Ent);
7484 when 9 => Set_D_Float (Ent);
7485 when 15 => Set_G_Float (Ent);
7489 ("wrong digits value, must be 6,9 or 15", Arg2);
7492 -- Two arguments, IEEE_Float case
7496 when 6 => Set_IEEE_Short (Ent);
7497 when 15 => Set_IEEE_Long (Ent);
7501 ("wrong digits value, must be 6 or 15", Arg2);
7505 end Float_Representation;
7511 -- pragma Ident (static_string_EXPRESSION)
7513 -- Note: pragma Comment shares this processing. Pragma Comment is
7514 -- identical to Ident, except that the restriction of the argument to
7515 -- 31 characters and the placement restrictions are not enforced for
7518 when Pragma_Ident | Pragma_Comment => Ident : declare
7523 Check_Arg_Count (1);
7524 Check_No_Identifiers;
7525 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7527 -- For pragma Ident, preserve DEC compatibility by requiring the
7528 -- pragma to appear in a declarative part or package spec.
7530 if Prag_Id = Pragma_Ident then
7531 Check_Is_In_Decl_Part_Or_Package_Spec;
7534 Str := Expr_Value_S (Expression (Arg1));
7541 GP := Parent (Parent (N));
7543 if Nkind_In (GP, N_Package_Declaration,
7544 N_Generic_Package_Declaration)
7549 -- If we have a compilation unit, then record the ident value,
7550 -- checking for improper duplication.
7552 if Nkind (GP) = N_Compilation_Unit then
7553 CS := Ident_String (Current_Sem_Unit);
7555 if Present (CS) then
7557 -- For Ident, we do not permit multiple instances
7559 if Prag_Id = Pragma_Ident then
7560 Error_Pragma ("duplicate% pragma not permitted");
7562 -- For Comment, we concatenate the string, unless we want
7563 -- to preserve the tree structure for ASIS.
7565 elsif not ASIS_Mode then
7566 Start_String (Strval (CS));
7567 Store_String_Char (' ');
7568 Store_String_Chars (Strval (Str));
7569 Set_Strval (CS, End_String);
7573 -- In VMS, the effect of IDENT is achieved by passing
7574 -- IDENTIFICATION=name as a --for-linker switch.
7576 if OpenVMS_On_Target then
7579 ("--for-linker=IDENTIFICATION=");
7580 String_To_Name_Buffer (Strval (Str));
7581 Store_String_Chars (Name_Buffer (1 .. Name_Len));
7583 -- Only the last processed IDENT is saved. The main
7584 -- purpose is so an IDENT associated with a main
7585 -- procedure will be used in preference to an IDENT
7586 -- associated with a with'd package.
7588 Replace_Linker_Option_String
7589 (End_String, "--for-linker=IDENTIFICATION=");
7592 Set_Ident_String (Current_Sem_Unit, Str);
7595 -- For subunits, we just ignore the Ident, since in GNAT these
7596 -- are not separate object files, and hence not separate units
7597 -- in the unit table.
7599 elsif Nkind (GP) = N_Subunit then
7602 -- Otherwise we have a misplaced pragma Ident, but we ignore
7603 -- this if we are in an instantiation, since it comes from
7604 -- a generic, and has no relevance to the instantiation.
7606 elsif Prag_Id = Pragma_Ident then
7607 if Instantiation_Location (Loc) = No_Location then
7608 Error_Pragma ("pragma% only allowed at outer level");
7614 --------------------------
7615 -- Implemented_By_Entry --
7616 --------------------------
7618 -- pragma Implemented_By_Entry (DIRECT_NAME);
7620 when Pragma_Implemented_By_Entry => Implemented_By_Entry : declare
7625 Check_Arg_Count (1);
7626 Check_No_Identifiers;
7627 Check_Arg_Is_Identifier (Arg1);
7628 Check_Arg_Is_Local_Name (Arg1);
7629 Ent := Entity (Expression (Arg1));
7631 -- Pragma Implemented_By_Entry must be applied only to protected
7632 -- synchronized or task interface primitives.
7634 if (Ekind (Ent) /= E_Function
7635 and then Ekind (Ent) /= E_Procedure)
7636 or else not Present (First_Formal (Ent))
7637 or else not Is_Concurrent_Interface (Etype (First_Formal (Ent)))
7640 ("pragma % must be applied to a concurrent interface " &
7644 if Einfo.Implemented_By_Entry (Ent)
7645 and then Warn_On_Redundant_Constructs
7647 Error_Pragma ("?duplicate pragma%!");
7649 Set_Implemented_By_Entry (Ent);
7652 end Implemented_By_Entry;
7654 -----------------------
7655 -- Implicit_Packing --
7656 -----------------------
7658 -- pragma Implicit_Packing;
7660 when Pragma_Implicit_Packing =>
7662 Check_Arg_Count (0);
7663 Implicit_Packing := True;
7670 -- [Convention =>] convention_IDENTIFIER,
7671 -- [Entity =>] local_NAME
7672 -- [, [External_Name =>] static_string_EXPRESSION ]
7673 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7675 when Pragma_Import =>
7676 Check_Ada_83_Warning;
7682 Check_At_Least_N_Arguments (2);
7683 Check_At_Most_N_Arguments (4);
7684 Process_Import_Or_Interface;
7686 ----------------------
7687 -- Import_Exception --
7688 ----------------------
7690 -- pragma Import_Exception (
7691 -- [Internal =>] LOCAL_NAME
7692 -- [, [External =>] EXTERNAL_SYMBOL]
7693 -- [, [Form =>] Ada | VMS]
7694 -- [, [Code =>] static_integer_EXPRESSION]);
7696 when Pragma_Import_Exception => Import_Exception : declare
7697 Args : Args_List (1 .. 4);
7698 Names : constant Name_List (1 .. 4) := (
7704 Internal : Node_Id renames Args (1);
7705 External : Node_Id renames Args (2);
7706 Form : Node_Id renames Args (3);
7707 Code : Node_Id renames Args (4);
7711 Gather_Associations (Names, Args);
7713 if Present (External) and then Present (Code) then
7715 ("cannot give both External and Code options for pragma%");
7718 Process_Extended_Import_Export_Exception_Pragma (
7719 Arg_Internal => Internal,
7720 Arg_External => External,
7724 if not Is_VMS_Exception (Entity (Internal)) then
7725 Set_Imported (Entity (Internal));
7727 end Import_Exception;
7729 ---------------------
7730 -- Import_Function --
7731 ---------------------
7733 -- pragma Import_Function (
7734 -- [Internal =>] LOCAL_NAME,
7735 -- [, [External =>] EXTERNAL_SYMBOL]
7736 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7737 -- [, [Result_Type =>] SUBTYPE_MARK]
7738 -- [, [Mechanism =>] MECHANISM]
7739 -- [, [Result_Mechanism =>] MECHANISM_NAME]
7740 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7742 -- EXTERNAL_SYMBOL ::=
7744 -- | static_string_EXPRESSION
7746 -- PARAMETER_TYPES ::=
7748 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7750 -- TYPE_DESIGNATOR ::=
7752 -- | subtype_Name ' Access
7756 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7758 -- MECHANISM_ASSOCIATION ::=
7759 -- [formal_parameter_NAME =>] MECHANISM_NAME
7761 -- MECHANISM_NAME ::=
7764 -- | Descriptor [([Class =>] CLASS_NAME)]
7766 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7768 when Pragma_Import_Function => Import_Function : declare
7769 Args : Args_List (1 .. 7);
7770 Names : constant Name_List (1 .. 7) := (
7773 Name_Parameter_Types,
7776 Name_Result_Mechanism,
7777 Name_First_Optional_Parameter);
7779 Internal : Node_Id renames Args (1);
7780 External : Node_Id renames Args (2);
7781 Parameter_Types : Node_Id renames Args (3);
7782 Result_Type : Node_Id renames Args (4);
7783 Mechanism : Node_Id renames Args (5);
7784 Result_Mechanism : Node_Id renames Args (6);
7785 First_Optional_Parameter : Node_Id renames Args (7);
7789 Gather_Associations (Names, Args);
7790 Process_Extended_Import_Export_Subprogram_Pragma (
7791 Arg_Internal => Internal,
7792 Arg_External => External,
7793 Arg_Parameter_Types => Parameter_Types,
7794 Arg_Result_Type => Result_Type,
7795 Arg_Mechanism => Mechanism,
7796 Arg_Result_Mechanism => Result_Mechanism,
7797 Arg_First_Optional_Parameter => First_Optional_Parameter);
7798 end Import_Function;
7804 -- pragma Import_Object (
7805 -- [Internal =>] LOCAL_NAME
7806 -- [, [External =>] EXTERNAL_SYMBOL]
7807 -- [, [Size =>] EXTERNAL_SYMBOL]);
7809 -- EXTERNAL_SYMBOL ::=
7811 -- | static_string_EXPRESSION
7813 when Pragma_Import_Object => Import_Object : declare
7814 Args : Args_List (1 .. 3);
7815 Names : constant Name_List (1 .. 3) := (
7820 Internal : Node_Id renames Args (1);
7821 External : Node_Id renames Args (2);
7822 Size : Node_Id renames Args (3);
7826 Gather_Associations (Names, Args);
7827 Process_Extended_Import_Export_Object_Pragma (
7828 Arg_Internal => Internal,
7829 Arg_External => External,
7833 ----------------------
7834 -- Import_Procedure --
7835 ----------------------
7837 -- pragma Import_Procedure (
7838 -- [Internal =>] LOCAL_NAME
7839 -- [, [External =>] EXTERNAL_SYMBOL]
7840 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7841 -- [, [Mechanism =>] MECHANISM]
7842 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7844 -- EXTERNAL_SYMBOL ::=
7846 -- | static_string_EXPRESSION
7848 -- PARAMETER_TYPES ::=
7850 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7852 -- TYPE_DESIGNATOR ::=
7854 -- | subtype_Name ' Access
7858 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7860 -- MECHANISM_ASSOCIATION ::=
7861 -- [formal_parameter_NAME =>] MECHANISM_NAME
7863 -- MECHANISM_NAME ::=
7866 -- | Descriptor [([Class =>] CLASS_NAME)]
7868 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7870 when Pragma_Import_Procedure => Import_Procedure : declare
7871 Args : Args_List (1 .. 5);
7872 Names : constant Name_List (1 .. 5) := (
7875 Name_Parameter_Types,
7877 Name_First_Optional_Parameter);
7879 Internal : Node_Id renames Args (1);
7880 External : Node_Id renames Args (2);
7881 Parameter_Types : Node_Id renames Args (3);
7882 Mechanism : Node_Id renames Args (4);
7883 First_Optional_Parameter : Node_Id renames Args (5);
7887 Gather_Associations (Names, Args);
7888 Process_Extended_Import_Export_Subprogram_Pragma (
7889 Arg_Internal => Internal,
7890 Arg_External => External,
7891 Arg_Parameter_Types => Parameter_Types,
7892 Arg_Mechanism => Mechanism,
7893 Arg_First_Optional_Parameter => First_Optional_Parameter);
7894 end Import_Procedure;
7896 -----------------------------
7897 -- Import_Valued_Procedure --
7898 -----------------------------
7900 -- pragma Import_Valued_Procedure (
7901 -- [Internal =>] LOCAL_NAME
7902 -- [, [External =>] EXTERNAL_SYMBOL]
7903 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7904 -- [, [Mechanism =>] MECHANISM]
7905 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7907 -- EXTERNAL_SYMBOL ::=
7909 -- | static_string_EXPRESSION
7911 -- PARAMETER_TYPES ::=
7913 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7915 -- TYPE_DESIGNATOR ::=
7917 -- | subtype_Name ' Access
7921 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7923 -- MECHANISM_ASSOCIATION ::=
7924 -- [formal_parameter_NAME =>] MECHANISM_NAME
7926 -- MECHANISM_NAME ::=
7929 -- | Descriptor [([Class =>] CLASS_NAME)]
7931 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7933 when Pragma_Import_Valued_Procedure =>
7934 Import_Valued_Procedure : declare
7935 Args : Args_List (1 .. 5);
7936 Names : constant Name_List (1 .. 5) := (
7939 Name_Parameter_Types,
7941 Name_First_Optional_Parameter);
7943 Internal : Node_Id renames Args (1);
7944 External : Node_Id renames Args (2);
7945 Parameter_Types : Node_Id renames Args (3);
7946 Mechanism : Node_Id renames Args (4);
7947 First_Optional_Parameter : Node_Id renames Args (5);
7951 Gather_Associations (Names, Args);
7952 Process_Extended_Import_Export_Subprogram_Pragma (
7953 Arg_Internal => Internal,
7954 Arg_External => External,
7955 Arg_Parameter_Types => Parameter_Types,
7956 Arg_Mechanism => Mechanism,
7957 Arg_First_Optional_Parameter => First_Optional_Parameter);
7958 end Import_Valued_Procedure;
7960 ------------------------
7961 -- Initialize_Scalars --
7962 ------------------------
7964 -- pragma Initialize_Scalars;
7966 when Pragma_Initialize_Scalars =>
7968 Check_Arg_Count (0);
7969 Check_Valid_Configuration_Pragma;
7970 Check_Restriction (No_Initialize_Scalars, N);
7972 -- Initialize_Scalars creates false positives in CodePeer,
7973 -- so ignore this pragma in this mode.
7975 if not Restriction_Active (No_Initialize_Scalars)
7976 and then not CodePeer_Mode
7978 Init_Or_Norm_Scalars := True;
7979 Initialize_Scalars := True;
7986 -- pragma Inline ( NAME {, NAME} );
7988 when Pragma_Inline =>
7990 -- Pragma is active if inlining option is active
7992 Process_Inline (Inline_Active);
7998 -- pragma Inline_Always ( NAME {, NAME} );
8000 when Pragma_Inline_Always =>
8002 Process_Inline (True);
8004 --------------------
8005 -- Inline_Generic --
8006 --------------------
8008 -- pragma Inline_Generic (NAME {, NAME});
8010 when Pragma_Inline_Generic =>
8012 Process_Generic_List;
8014 ----------------------
8015 -- Inspection_Point --
8016 ----------------------
8018 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
8020 when Pragma_Inspection_Point => Inspection_Point : declare
8025 if Arg_Count > 0 then
8028 Exp := Expression (Arg);
8031 if not Is_Entity_Name (Exp)
8032 or else not Is_Object (Entity (Exp))
8034 Error_Pragma_Arg ("object name required", Arg);
8041 end Inspection_Point;
8047 -- pragma Interface (
8048 -- [ Convention =>] convention_IDENTIFIER,
8049 -- [ Entity =>] local_NAME
8050 -- [, [External_Name =>] static_string_EXPRESSION ]
8051 -- [, [Link_Name =>] static_string_EXPRESSION ]);
8053 when Pragma_Interface =>
8060 Check_At_Least_N_Arguments (2);
8061 Check_At_Most_N_Arguments (4);
8062 Process_Import_Or_Interface;
8064 --------------------
8065 -- Interface_Name --
8066 --------------------
8068 -- pragma Interface_Name (
8069 -- [ Entity =>] local_NAME
8070 -- [,[External_Name =>] static_string_EXPRESSION ]
8071 -- [,[Link_Name =>] static_string_EXPRESSION ]);
8073 when Pragma_Interface_Name => Interface_Name : declare
8082 ((Name_Entity, Name_External_Name, Name_Link_Name));
8083 Check_At_Least_N_Arguments (2);
8084 Check_At_Most_N_Arguments (3);
8085 Id := Expression (Arg1);
8088 if not Is_Entity_Name (Id) then
8090 ("first argument for pragma% must be entity name", Arg1);
8091 elsif Etype (Id) = Any_Type then
8094 Def_Id := Entity (Id);
8097 -- Special DEC-compatible processing for the object case, forces
8098 -- object to be imported.
8100 if Ekind (Def_Id) = E_Variable then
8101 Kill_Size_Check_Code (Def_Id);
8102 Note_Possible_Modification (Id, Sure => False);
8104 -- Initialization is not allowed for imported variable
8106 if Present (Expression (Parent (Def_Id)))
8107 and then Comes_From_Source (Expression (Parent (Def_Id)))
8109 Error_Msg_Sloc := Sloc (Def_Id);
8111 ("no initialization allowed for declaration of& #",
8115 -- For compatibility, support VADS usage of providing both
8116 -- pragmas Interface and Interface_Name to obtain the effect
8117 -- of a single Import pragma.
8119 if Is_Imported (Def_Id)
8120 and then Present (First_Rep_Item (Def_Id))
8121 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
8123 Pragma_Name (First_Rep_Item (Def_Id)) = Name_Interface
8127 Set_Imported (Def_Id);
8130 Set_Is_Public (Def_Id);
8131 Process_Interface_Name (Def_Id, Arg2, Arg3);
8134 -- Otherwise must be subprogram
8136 elsif not Is_Subprogram (Def_Id) then
8138 ("argument of pragma% is not subprogram", Arg1);
8141 Check_At_Most_N_Arguments (3);
8145 -- Loop through homonyms
8148 Def_Id := Get_Base_Subprogram (Hom_Id);
8150 if Is_Imported (Def_Id) then
8151 Process_Interface_Name (Def_Id, Arg2, Arg3);
8155 Hom_Id := Homonym (Hom_Id);
8157 exit when No (Hom_Id)
8158 or else Scope (Hom_Id) /= Current_Scope;
8163 ("argument of pragma% is not imported subprogram",
8169 -----------------------
8170 -- Interrupt_Handler --
8171 -----------------------
8173 -- pragma Interrupt_Handler (handler_NAME);
8175 when Pragma_Interrupt_Handler =>
8176 Check_Ada_83_Warning;
8177 Check_Arg_Count (1);
8178 Check_No_Identifiers;
8180 if No_Run_Time_Mode then
8181 Error_Msg_CRT ("Interrupt_Handler pragma", N);
8183 Check_Interrupt_Or_Attach_Handler;
8184 Process_Interrupt_Or_Attach_Handler;
8187 ------------------------
8188 -- Interrupt_Priority --
8189 ------------------------
8191 -- pragma Interrupt_Priority [(EXPRESSION)];
8193 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
8194 P : constant Node_Id := Parent (N);
8198 Check_Ada_83_Warning;
8200 if Arg_Count /= 0 then
8201 Arg := Expression (Arg1);
8202 Check_Arg_Count (1);
8203 Check_No_Identifiers;
8205 -- The expression must be analyzed in the special manner
8206 -- described in "Handling of Default and Per-Object
8207 -- Expressions" in sem.ads.
8209 Preanalyze_Spec_Expression (Arg, RTE (RE_Interrupt_Priority));
8212 if not Nkind_In (P, N_Task_Definition, N_Protected_Definition) then
8216 elsif Has_Priority_Pragma (P) then
8217 Error_Pragma ("duplicate pragma% not allowed");
8220 Set_Has_Priority_Pragma (P, True);
8221 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8223 end Interrupt_Priority;
8225 ---------------------
8226 -- Interrupt_State --
8227 ---------------------
8229 -- pragma Interrupt_State (
8230 -- [Name =>] INTERRUPT_ID,
8231 -- [State =>] INTERRUPT_STATE);
8233 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
8234 -- INTERRUPT_STATE => System | Runtime | User
8236 -- Note: if the interrupt id is given as an identifier, then it must
8237 -- be one of the identifiers in Ada.Interrupts.Names. Otherwise it is
8238 -- given as a static integer expression which must be in the range of
8239 -- Ada.Interrupts.Interrupt_ID.
8241 when Pragma_Interrupt_State => Interrupt_State : declare
8243 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
8244 -- This is the entity Ada.Interrupts.Interrupt_ID;
8246 State_Type : Character;
8247 -- Set to 's'/'r'/'u' for System/Runtime/User
8250 -- Index to entry in Interrupt_States table
8253 -- Value of interrupt
8255 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
8256 -- The first argument to the pragma
8258 Int_Ent : Entity_Id;
8259 -- Interrupt entity in Ada.Interrupts.Names
8263 Check_Arg_Order ((Name_Name, Name_State));
8264 Check_Arg_Count (2);
8266 Check_Optional_Identifier (Arg1, Name_Name);
8267 Check_Optional_Identifier (Arg2, Name_State);
8268 Check_Arg_Is_Identifier (Arg2);
8270 -- First argument is identifier
8272 if Nkind (Arg1X) = N_Identifier then
8274 -- Search list of names in Ada.Interrupts.Names
8276 Int_Ent := First_Entity (RTE (RE_Names));
8278 if No (Int_Ent) then
8279 Error_Pragma_Arg ("invalid interrupt name", Arg1);
8281 elsif Chars (Int_Ent) = Chars (Arg1X) then
8282 Int_Val := Expr_Value (Constant_Value (Int_Ent));
8286 Next_Entity (Int_Ent);
8289 -- First argument is not an identifier, so it must be a static
8290 -- expression of type Ada.Interrupts.Interrupt_ID.
8293 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
8294 Int_Val := Expr_Value (Arg1X);
8296 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
8298 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
8301 ("value not in range of type " &
8302 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
8308 case Chars (Get_Pragma_Arg (Arg2)) is
8309 when Name_Runtime => State_Type := 'r';
8310 when Name_System => State_Type := 's';
8311 when Name_User => State_Type := 'u';
8314 Error_Pragma_Arg ("invalid interrupt state", Arg2);
8317 -- Check if entry is already stored
8319 IST_Num := Interrupt_States.First;
8321 -- If entry not found, add it
8323 if IST_Num > Interrupt_States.Last then
8324 Interrupt_States.Append
8325 ((Interrupt_Number => UI_To_Int (Int_Val),
8326 Interrupt_State => State_Type,
8327 Pragma_Loc => Loc));
8330 -- Case of entry for the same entry
8332 elsif Int_Val = Interrupt_States.Table (IST_Num).
8335 -- If state matches, done, no need to make redundant entry
8338 State_Type = Interrupt_States.Table (IST_Num).
8341 -- Otherwise if state does not match, error
8344 Interrupt_States.Table (IST_Num).Pragma_Loc;
8346 ("state conflicts with that given #", Arg2);
8350 IST_Num := IST_Num + 1;
8352 end Interrupt_State;
8354 ----------------------
8355 -- Java_Constructor --
8356 ----------------------
8358 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
8360 -- Also handles pragma CIL_Constructor
8362 when Pragma_CIL_Constructor | Pragma_Java_Constructor =>
8363 Java_Constructor : declare
8367 Convention : Convention_Id;
8371 Check_Arg_Count (1);
8372 Check_Optional_Identifier (Arg1, Name_Entity);
8373 Check_Arg_Is_Local_Name (Arg1);
8375 Id := Expression (Arg1);
8376 Find_Program_Unit_Name (Id);
8378 -- If we did not find the name, we are done
8380 if Etype (Id) = Any_Type then
8385 when Pragma_CIL_Constructor => Convention := Convention_CIL;
8386 when Pragma_Java_Constructor => Convention := Convention_Java;
8387 when others => null;
8390 Hom_Id := Entity (Id);
8392 -- Loop through homonyms
8395 Def_Id := Get_Base_Subprogram (Hom_Id);
8397 -- The constructor is required to be a function returning an
8398 -- access type whose designated type has convention Java/CIL.
8400 if Ekind (Def_Id) = E_Function
8402 (Is_Value_Type (Etype (Def_Id))
8404 (Ekind (Etype (Def_Id)) = E_Access_Subprogram_Type
8406 Atree.Convention (Etype (Def_Id)) = Convention)
8408 (Ekind (Etype (Def_Id)) in Access_Kind
8411 (Designated_Type (Etype (Def_Id))) = Convention
8414 (Root_Type (Designated_Type (Etype (Def_Id)))) =
8417 Set_Is_Constructor (Def_Id);
8418 Set_Convention (Def_Id, Convention);
8419 Set_Is_Imported (Def_Id);
8422 if Convention = Convention_Java then
8424 ("pragma% requires function returning a " &
8425 "'Java access type", Arg1);
8427 pragma Assert (Convention = Convention_CIL);
8429 ("pragma% requires function returning a " &
8430 "'C'I'L access type", Arg1);
8434 Hom_Id := Homonym (Hom_Id);
8436 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
8438 end Java_Constructor;
8440 ----------------------
8441 -- Java_Interface --
8442 ----------------------
8444 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
8446 when Pragma_Java_Interface => Java_Interface : declare
8452 Check_Arg_Count (1);
8453 Check_Optional_Identifier (Arg1, Name_Entity);
8454 Check_Arg_Is_Local_Name (Arg1);
8456 Arg := Expression (Arg1);
8459 if Etype (Arg) = Any_Type then
8463 if not Is_Entity_Name (Arg)
8464 or else not Is_Type (Entity (Arg))
8466 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
8469 Typ := Underlying_Type (Entity (Arg));
8471 -- For now simply check some of the semantic constraints on the
8472 -- type. This currently leaves out some restrictions on interface
8473 -- types, namely that the parent type must be java.lang.Object.Typ
8474 -- and that all primitives of the type should be declared
8477 if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then
8478 Error_Pragma_Arg ("pragma% requires an abstract "
8479 & "tagged type", Arg1);
8481 elsif not Has_Discriminants (Typ)
8482 or else Ekind (Etype (First_Discriminant (Typ)))
8483 /= E_Anonymous_Access_Type
8485 not Is_Class_Wide_Type
8486 (Designated_Type (Etype (First_Discriminant (Typ))))
8489 ("type must have a class-wide access discriminant", Arg1);
8497 -- pragma Keep_Names ([On => ] local_NAME);
8499 when Pragma_Keep_Names => Keep_Names : declare
8504 Check_Arg_Count (1);
8505 Check_Optional_Identifier (Arg1, Name_On);
8506 Check_Arg_Is_Local_Name (Arg1);
8508 Arg := Expression (Arg1);
8511 if Etype (Arg) = Any_Type then
8515 if not Is_Entity_Name (Arg)
8516 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
8519 ("pragma% requires a local enumeration type", Arg1);
8522 Set_Discard_Names (Entity (Arg), False);
8529 -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
8531 when Pragma_License =>
8533 Check_Arg_Count (1);
8534 Check_No_Identifiers;
8535 Check_Valid_Configuration_Pragma;
8536 Check_Arg_Is_Identifier (Arg1);
8539 Sind : constant Source_File_Index :=
8540 Source_Index (Current_Sem_Unit);
8543 case Chars (Get_Pragma_Arg (Arg1)) is
8545 Set_License (Sind, GPL);
8547 when Name_Modified_GPL =>
8548 Set_License (Sind, Modified_GPL);
8550 when Name_Restricted =>
8551 Set_License (Sind, Restricted);
8553 when Name_Unrestricted =>
8554 Set_License (Sind, Unrestricted);
8557 Error_Pragma_Arg ("invalid license name", Arg1);
8565 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
8567 when Pragma_Link_With => Link_With : declare
8573 if Operating_Mode = Generate_Code
8574 and then In_Extended_Main_Source_Unit (N)
8576 Check_At_Least_N_Arguments (1);
8577 Check_No_Identifiers;
8578 Check_Is_In_Decl_Part_Or_Package_Spec;
8579 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8583 while Present (Arg) loop
8584 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8586 -- Store argument, converting sequences of spaces to a
8587 -- single null character (this is one of the differences
8588 -- in processing between Link_With and Linker_Options).
8591 C : constant Char_Code := Get_Char_Code (' ');
8592 S : constant String_Id :=
8593 Strval (Expr_Value_S (Expression (Arg)));
8594 L : constant Nat := String_Length (S);
8597 procedure Skip_Spaces;
8598 -- Advance F past any spaces
8604 procedure Skip_Spaces is
8606 while F <= L and then Get_String_Char (S, F) = C loop
8611 -- Start of processing for Arg_Store
8614 Skip_Spaces; -- skip leading spaces
8616 -- Loop through characters, changing any embedded
8617 -- sequence of spaces to a single null character (this
8618 -- is how Link_With/Linker_Options differ)
8621 if Get_String_Char (S, F) = C then
8624 Store_String_Char (ASCII.NUL);
8627 Store_String_Char (Get_String_Char (S, F));
8635 if Present (Arg) then
8636 Store_String_Char (ASCII.NUL);
8640 Store_Linker_Option_String (End_String);
8648 -- pragma Linker_Alias (
8649 -- [Entity =>] LOCAL_NAME
8650 -- [Target =>] static_string_EXPRESSION);
8652 when Pragma_Linker_Alias =>
8654 Check_Arg_Order ((Name_Entity, Name_Target));
8655 Check_Arg_Count (2);
8656 Check_Optional_Identifier (Arg1, Name_Entity);
8657 Check_Optional_Identifier (Arg2, Name_Target);
8658 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8659 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8661 -- The only processing required is to link this item on to the
8662 -- list of rep items for the given entity. This is accomplished
8663 -- by the call to Rep_Item_Too_Late (when no error is detected
8664 -- and False is returned).
8666 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8669 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8672 ------------------------
8673 -- Linker_Constructor --
8674 ------------------------
8676 -- pragma Linker_Constructor (procedure_LOCAL_NAME);
8678 -- Code is shared with Linker_Destructor
8680 -----------------------
8681 -- Linker_Destructor --
8682 -----------------------
8684 -- pragma Linker_Destructor (procedure_LOCAL_NAME);
8686 when Pragma_Linker_Constructor |
8687 Pragma_Linker_Destructor =>
8688 Linker_Constructor : declare
8694 Check_Arg_Count (1);
8695 Check_No_Identifiers;
8696 Check_Arg_Is_Local_Name (Arg1);
8697 Arg1_X := Expression (Arg1);
8699 Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
8701 if not Is_Library_Level_Entity (Proc) then
8703 ("argument for pragma% must be library level entity", Arg1);
8706 -- The only processing required is to link this item on to the
8707 -- list of rep items for the given entity. This is accomplished
8708 -- by the call to Rep_Item_Too_Late (when no error is detected
8709 -- and False is returned).
8711 if Rep_Item_Too_Late (Proc, N) then
8714 Set_Has_Gigi_Rep_Item (Proc);
8716 end Linker_Constructor;
8718 --------------------
8719 -- Linker_Options --
8720 --------------------
8722 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
8724 when Pragma_Linker_Options => Linker_Options : declare
8728 Check_Ada_83_Warning;
8729 Check_No_Identifiers;
8730 Check_Arg_Count (1);
8731 Check_Is_In_Decl_Part_Or_Package_Spec;
8732 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8733 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
8736 while Present (Arg) loop
8737 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8738 Store_String_Char (ASCII.NUL);
8739 Store_String_Chars (Strval (Expr_Value_S (Expression (Arg))));
8743 if Operating_Mode = Generate_Code
8744 and then In_Extended_Main_Source_Unit (N)
8746 Store_Linker_Option_String (End_String);
8750 --------------------
8751 -- Linker_Section --
8752 --------------------
8754 -- pragma Linker_Section (
8755 -- [Entity =>] LOCAL_NAME
8756 -- [Section =>] static_string_EXPRESSION);
8758 when Pragma_Linker_Section =>
8760 Check_Arg_Order ((Name_Entity, Name_Section));
8761 Check_Arg_Count (2);
8762 Check_Optional_Identifier (Arg1, Name_Entity);
8763 Check_Optional_Identifier (Arg2, Name_Section);
8764 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8765 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8767 -- This pragma applies only to objects
8769 if not Is_Object (Entity (Expression (Arg1))) then
8770 Error_Pragma_Arg ("pragma% applies only to objects", Arg1);
8773 -- The only processing required is to link this item on to the
8774 -- list of rep items for the given entity. This is accomplished
8775 -- by the call to Rep_Item_Too_Late (when no error is detected
8776 -- and False is returned).
8778 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8781 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8788 -- pragma List (On | Off)
8790 -- There is nothing to do here, since we did all the processing for
8791 -- this pragma in Par.Prag (so that it works properly even in syntax
8797 --------------------
8798 -- Locking_Policy --
8799 --------------------
8801 -- pragma Locking_Policy (policy_IDENTIFIER);
8803 when Pragma_Locking_Policy => declare
8807 Check_Ada_83_Warning;
8808 Check_Arg_Count (1);
8809 Check_No_Identifiers;
8810 Check_Arg_Is_Locking_Policy (Arg1);
8811 Check_Valid_Configuration_Pragma;
8812 Get_Name_String (Chars (Expression (Arg1)));
8813 LP := Fold_Upper (Name_Buffer (1));
8815 if Locking_Policy /= ' '
8816 and then Locking_Policy /= LP
8818 Error_Msg_Sloc := Locking_Policy_Sloc;
8819 Error_Pragma ("locking policy incompatible with policy#");
8821 -- Set new policy, but always preserve System_Location since we
8822 -- like the error message with the run time name.
8825 Locking_Policy := LP;
8827 if Locking_Policy_Sloc /= System_Location then
8828 Locking_Policy_Sloc := Loc;
8837 -- pragma Long_Float (D_Float | G_Float);
8839 when Pragma_Long_Float =>
8841 Check_Valid_Configuration_Pragma;
8842 Check_Arg_Count (1);
8843 Check_No_Identifier (Arg1);
8844 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
8846 if not OpenVMS_On_Target then
8847 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
8852 if Chars (Expression (Arg1)) = Name_D_Float then
8853 if Opt.Float_Format_Long = 'G' then
8854 Error_Pragma ("G_Float previously specified");
8857 Opt.Float_Format_Long := 'D';
8859 -- G_Float case (this is the default, does not need overriding)
8862 if Opt.Float_Format_Long = 'D' then
8863 Error_Pragma ("D_Float previously specified");
8866 Opt.Float_Format_Long := 'G';
8869 Set_Standard_Fpt_Formats;
8871 -----------------------
8872 -- Machine_Attribute --
8873 -----------------------
8875 -- pragma Machine_Attribute (
8876 -- [Entity =>] LOCAL_NAME,
8877 -- [Attribute_Name =>] static_string_EXPRESSION
8878 -- [, [Info =>] static_EXPRESSION] );
8880 when Pragma_Machine_Attribute => Machine_Attribute : declare
8885 Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
8887 if Arg_Count = 3 then
8888 Check_Optional_Identifier (Arg3, Name_Info);
8889 Check_Arg_Is_Static_Expression (Arg3);
8891 Check_Arg_Count (2);
8894 Check_Optional_Identifier (Arg1, Name_Entity);
8895 Check_Optional_Identifier (Arg2, Name_Attribute_Name);
8896 Check_Arg_Is_Local_Name (Arg1);
8897 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8898 Def_Id := Entity (Expression (Arg1));
8900 if Is_Access_Type (Def_Id) then
8901 Def_Id := Designated_Type (Def_Id);
8904 if Rep_Item_Too_Early (Def_Id, N) then
8908 Def_Id := Underlying_Type (Def_Id);
8910 -- The only processing required is to link this item on to the
8911 -- list of rep items for the given entity. This is accomplished
8912 -- by the call to Rep_Item_Too_Late (when no error is detected
8913 -- and False is returned).
8915 if Rep_Item_Too_Late (Def_Id, N) then
8918 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8920 end Machine_Attribute;
8927 -- (MAIN_OPTION [, MAIN_OPTION]);
8930 -- [STACK_SIZE =>] static_integer_EXPRESSION
8931 -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION
8932 -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION
8934 when Pragma_Main => Main : declare
8935 Args : Args_List (1 .. 3);
8936 Names : constant Name_List (1 .. 3) := (
8938 Name_Task_Stack_Size_Default,
8939 Name_Time_Slicing_Enabled);
8945 Gather_Associations (Names, Args);
8947 for J in 1 .. 2 loop
8948 if Present (Args (J)) then
8949 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8953 if Present (Args (3)) then
8954 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
8958 while Present (Nod) loop
8959 if Nkind (Nod) = N_Pragma
8960 and then Pragma_Name (Nod) = Name_Main
8962 Error_Msg_Name_1 := Pname;
8963 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8974 -- pragma Main_Storage
8975 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
8977 -- MAIN_STORAGE_OPTION ::=
8978 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
8979 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
8981 when Pragma_Main_Storage => Main_Storage : declare
8982 Args : Args_List (1 .. 2);
8983 Names : constant Name_List (1 .. 2) := (
8984 Name_Working_Storage,
8991 Gather_Associations (Names, Args);
8993 for J in 1 .. 2 loop
8994 if Present (Args (J)) then
8995 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8999 Check_In_Main_Program;
9002 while Present (Nod) loop
9003 if Nkind (Nod) = N_Pragma
9004 and then Pragma_Name (Nod) = Name_Main_Storage
9006 Error_Msg_Name_1 := Pname;
9007 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9018 -- pragma Memory_Size (NUMERIC_LITERAL)
9020 when Pragma_Memory_Size =>
9023 -- Memory size is simply ignored
9025 Check_No_Identifiers;
9026 Check_Arg_Count (1);
9027 Check_Arg_Is_Integer_Literal (Arg1);
9035 -- The only correct use of this pragma is on its own in a file, in
9036 -- which case it is specially processed (see Gnat1drv.Check_Bad_Body
9037 -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to
9038 -- check for a file containing nothing but a No_Body pragma). If we
9039 -- attempt to process it during normal semantics processing, it means
9040 -- it was misplaced.
9042 when Pragma_No_Body =>
9050 -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
9052 when Pragma_No_Return => No_Return : declare
9060 Check_At_Least_N_Arguments (1);
9062 -- Loop through arguments of pragma
9065 while Present (Arg) loop
9066 Check_Arg_Is_Local_Name (Arg);
9067 Id := Expression (Arg);
9070 if not Is_Entity_Name (Id) then
9071 Error_Pragma_Arg ("entity name required", Arg);
9074 if Etype (Id) = Any_Type then
9078 -- Loop to find matching procedures
9083 and then Scope (E) = Current_Scope
9085 if Ekind (E) = E_Procedure
9086 or else Ekind (E) = E_Generic_Procedure
9090 -- Set flag on any alias as well
9092 if Is_Overloadable (E) and then Present (Alias (E)) then
9093 Set_No_Return (Alias (E));
9103 Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
9114 -- pragma No_Run_Time;
9116 -- Note: this pragma is retained for backwards compatibility. See
9117 -- body of Rtsfind for full details on its handling.
9119 when Pragma_No_Run_Time =>
9121 Check_Valid_Configuration_Pragma;
9122 Check_Arg_Count (0);
9124 No_Run_Time_Mode := True;
9125 Configurable_Run_Time_Mode := True;
9127 -- Set Duration to 32 bits if word size is 32
9129 if Ttypes.System_Word_Size = 32 then
9130 Duration_32_Bits_On_Target := True;
9133 -- Set appropriate restrictions
9135 Set_Restriction (No_Finalization, N);
9136 Set_Restriction (No_Exception_Handlers, N);
9137 Set_Restriction (Max_Tasks, N, 0);
9138 Set_Restriction (No_Tasking, N);
9140 ------------------------
9141 -- No_Strict_Aliasing --
9142 ------------------------
9144 -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
9146 when Pragma_No_Strict_Aliasing => No_Strict_Aliasing : declare
9151 Check_At_Most_N_Arguments (1);
9153 if Arg_Count = 0 then
9154 Check_Valid_Configuration_Pragma;
9155 Opt.No_Strict_Aliasing := True;
9158 Check_Optional_Identifier (Arg2, Name_Entity);
9159 Check_Arg_Is_Local_Name (Arg1);
9160 E_Id := Entity (Expression (Arg1));
9162 if E_Id = Any_Type then
9164 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
9165 Error_Pragma_Arg ("pragma% requires access type", Arg1);
9168 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
9170 end No_Strict_Aliasing;
9172 -----------------------
9173 -- Normalize_Scalars --
9174 -----------------------
9176 -- pragma Normalize_Scalars;
9178 when Pragma_Normalize_Scalars =>
9179 Check_Ada_83_Warning;
9180 Check_Arg_Count (0);
9181 Check_Valid_Configuration_Pragma;
9183 -- Normalize_Scalars creates false positives in CodePeer, so
9184 -- ignore this pragma in this mode.
9186 if not CodePeer_Mode then
9187 Normalize_Scalars := True;
9188 Init_Or_Norm_Scalars := True;
9195 -- pragma Obsolescent;
9197 -- pragma Obsolescent (
9198 -- [Message =>] static_string_EXPRESSION
9199 -- [,[Version =>] Ada_05]]);
9201 -- pragma Obsolescent (
9203 -- [,[Message =>] static_string_EXPRESSION
9204 -- [,[Version =>] Ada_05]] );
9206 when Pragma_Obsolescent => Obsolescent : declare
9210 procedure Set_Obsolescent (E : Entity_Id);
9211 -- Given an entity Ent, mark it as obsolescent if appropriate
9213 ---------------------
9214 -- Set_Obsolescent --
9215 ---------------------
9217 procedure Set_Obsolescent (E : Entity_Id) is
9226 -- Entity name was given
9228 if Present (Ename) then
9230 -- If entity name matches, we are fine. Save entity in
9231 -- pragma argument, for ASIS use.
9233 if Chars (Ename) = Chars (Ent) then
9234 Set_Entity (Ename, Ent);
9235 Generate_Reference (Ent, Ename);
9237 -- If entity name does not match, only possibility is an
9238 -- enumeration literal from an enumeration type declaration.
9240 elsif Ekind (Ent) /= E_Enumeration_Type then
9242 ("pragma % entity name does not match declaration");
9245 Ent := First_Literal (E);
9249 ("pragma % entity name does not match any " &
9250 "enumeration literal");
9252 elsif Chars (Ent) = Chars (Ename) then
9253 Set_Entity (Ename, Ent);
9254 Generate_Reference (Ent, Ename);
9258 Ent := Next_Literal (Ent);
9264 -- Ent points to entity to be marked
9266 if Arg_Count >= 1 then
9268 -- Deal with static string argument
9270 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
9271 S := Strval (Expression (Arg1));
9273 for J in 1 .. String_Length (S) loop
9274 if not In_Character_Range (Get_String_Char (S, J)) then
9276 ("pragma% argument does not allow wide characters",
9281 Obsolescent_Warnings.Append
9282 ((Ent => Ent, Msg => Strval (Expression (Arg1))));
9284 -- Check for Ada_05 parameter
9286 if Arg_Count /= 1 then
9287 Check_Arg_Count (2);
9290 Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
9293 Check_Arg_Is_Identifier (Argx);
9295 if Chars (Argx) /= Name_Ada_05 then
9296 Error_Msg_Name_2 := Name_Ada_05;
9298 ("only allowed argument for pragma% is %", Argx);
9301 if Ada_Version_Explicit < Ada_05
9302 or else not Warn_On_Ada_2005_Compatibility
9310 -- Set flag if pragma active
9313 Set_Is_Obsolescent (Ent);
9317 end Set_Obsolescent;
9319 -- Start of processing for pragma Obsolescent
9324 Check_At_Most_N_Arguments (3);
9326 -- See if first argument specifies an entity name
9330 (Chars (Arg1) = Name_Entity
9332 Nkind_In (Get_Pragma_Arg (Arg1), N_Character_Literal,
9336 Ename := Get_Pragma_Arg (Arg1);
9338 -- Eliminate first argument, so we can share processing
9342 Arg_Count := Arg_Count - 1;
9344 -- No Entity name argument given
9350 if Arg_Count >= 1 then
9351 Check_Optional_Identifier (Arg1, Name_Message);
9353 if Arg_Count = 2 then
9354 Check_Optional_Identifier (Arg2, Name_Version);
9358 -- Get immediately preceding declaration
9361 while Present (Decl) and then Nkind (Decl) = N_Pragma loop
9365 -- Cases where we do not follow anything other than another pragma
9369 -- First case: library level compilation unit declaration with
9370 -- the pragma immediately following the declaration.
9372 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
9374 (Defining_Entity (Unit (Parent (Parent (N)))));
9377 -- Case 2: library unit placement for package
9381 Ent : constant Entity_Id := Find_Lib_Unit_Name;
9383 if Is_Package_Or_Generic_Package (Ent) then
9384 Set_Obsolescent (Ent);
9390 -- Cases where we must follow a declaration
9393 if Nkind (Decl) not in N_Declaration
9394 and then Nkind (Decl) not in N_Later_Decl_Item
9395 and then Nkind (Decl) not in N_Generic_Declaration
9396 and then Nkind (Decl) not in N_Renaming_Declaration
9399 ("pragma% misplaced, "
9400 & "must immediately follow a declaration");
9403 Set_Obsolescent (Defining_Entity (Decl));
9413 -- pragma Optimize (Time | Space | Off);
9415 -- The actual check for optimize is done in Gigi. Note that this
9416 -- pragma does not actually change the optimization setting, it
9417 -- simply checks that it is consistent with the pragma.
9419 when Pragma_Optimize =>
9420 Check_No_Identifiers;
9421 Check_Arg_Count (1);
9422 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
9424 ------------------------
9425 -- Optimize_Alignment --
9426 ------------------------
9428 -- pragma Optimize_Alignment (Time | Space | Off);
9430 when Pragma_Optimize_Alignment =>
9432 Check_No_Identifiers;
9433 Check_Arg_Count (1);
9434 Check_Valid_Configuration_Pragma;
9437 Nam : constant Name_Id := Chars (Get_Pragma_Arg (Arg1));
9441 Opt.Optimize_Alignment := 'T';
9443 Opt.Optimize_Alignment := 'S';
9445 Opt.Optimize_Alignment := 'O';
9447 Error_Pragma_Arg ("invalid argument for pragma%", Arg1);
9451 -- Set indication that mode is set locally. If we are in fact in a
9452 -- configuration pragma file, this setting is harmless since the
9453 -- switch will get reset anyway at the start of each unit.
9455 Optimize_Alignment_Local := True;
9461 -- pragma Pack (first_subtype_LOCAL_NAME);
9463 when Pragma_Pack => Pack : declare
9464 Assoc : constant Node_Id := Arg1;
9469 Check_No_Identifiers;
9470 Check_Arg_Count (1);
9471 Check_Arg_Is_Local_Name (Arg1);
9473 Type_Id := Expression (Assoc);
9474 Find_Type (Type_Id);
9475 Typ := Entity (Type_Id);
9478 or else Rep_Item_Too_Early (Typ, N)
9482 Typ := Underlying_Type (Typ);
9485 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
9486 Error_Pragma ("pragma% must specify array or record type");
9489 Check_First_Subtype (Arg1);
9491 if Has_Pragma_Pack (Typ) then
9492 Error_Pragma ("duplicate pragma%, only one allowed");
9496 elsif Is_Array_Type (Typ) then
9498 -- Pack not allowed for aliased or atomic components
9500 if Has_Aliased_Components (Base_Type (Typ)) then
9502 ("pragma% ignored, cannot pack aliased components?");
9504 elsif Has_Atomic_Components (Typ)
9505 or else Is_Atomic (Component_Type (Typ))
9508 ("?pragma% ignored, cannot pack atomic components");
9511 -- If we had an explicit component size given, then we do not
9512 -- let Pack override this given size. We also give a warning
9513 -- that Pack is being ignored unless we can tell for sure that
9514 -- the Pack would not have had any effect anyway.
9516 if Has_Component_Size_Clause (Typ) then
9517 if Known_Static_RM_Size (Component_Type (Typ))
9519 RM_Size (Component_Type (Typ)) = Component_Size (Typ)
9524 ("?pragma% ignored, explicit component size given");
9527 -- If no prior array component size given, Pack is effective
9530 if not Rep_Item_Too_Late (Typ, N) then
9532 -- In the context of static code analysis, we do not need
9533 -- complex front-end expansions related to pragma Pack,
9534 -- so disable handling of pragma Pack in this case.
9536 if CodePeer_Mode then
9539 -- For normal non-VM target, do the packing
9541 elsif VM_Target = No_VM then
9542 Set_Is_Packed (Base_Type (Typ));
9543 Set_Has_Pragma_Pack (Base_Type (Typ));
9544 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9546 -- If we ignore the pack, then warn about this, except
9547 -- that we suppress the warning in GNAT mode.
9549 elsif not GNAT_Mode then
9551 ("?pragma% ignored in this configuration");
9556 -- For record types, the pack is always effective
9558 else pragma Assert (Is_Record_Type (Typ));
9559 if not Rep_Item_Too_Late (Typ, N) then
9560 if VM_Target = No_VM then
9561 Set_Is_Packed (Base_Type (Typ));
9562 Set_Has_Pragma_Pack (Base_Type (Typ));
9563 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9565 elsif not GNAT_Mode then
9566 Error_Pragma ("?pragma% ignored in this configuration");
9578 -- There is nothing to do here, since we did all the processing for
9579 -- this pragma in Par.Prag (so that it works properly even in syntax
9589 -- pragma Passive [(PASSIVE_FORM)];
9591 -- PASSIVE_FORM ::= Semaphore | No
9593 when Pragma_Passive =>
9596 if Nkind (Parent (N)) /= N_Task_Definition then
9597 Error_Pragma ("pragma% must be within task definition");
9600 if Arg_Count /= 0 then
9601 Check_Arg_Count (1);
9602 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
9605 ----------------------------------
9606 -- Preelaborable_Initialization --
9607 ----------------------------------
9609 -- pragma Preelaborable_Initialization (DIRECT_NAME);
9611 when Pragma_Preelaborable_Initialization => Preelab_Init : declare
9616 Check_Arg_Count (1);
9617 Check_No_Identifiers;
9618 Check_Arg_Is_Identifier (Arg1);
9619 Check_Arg_Is_Local_Name (Arg1);
9620 Check_First_Subtype (Arg1);
9621 Ent := Entity (Expression (Arg1));
9623 if not Is_Private_Type (Ent)
9624 and then not Is_Protected_Type (Ent)
9627 ("pragma % can only be applied to private or protected type",
9631 -- Give an error if the pragma is applied to a protected type that
9632 -- does not qualify (due to having entries, or due to components
9633 -- that do not qualify).
9635 if Is_Protected_Type (Ent)
9636 and then not Has_Preelaborable_Initialization (Ent)
9639 ("protected type & does not have preelaborable " &
9640 "initialization", Ent);
9642 -- Otherwise mark the type as definitely having preelaborable
9646 Set_Known_To_Have_Preelab_Init (Ent);
9649 if Has_Pragma_Preelab_Init (Ent)
9650 and then Warn_On_Redundant_Constructs
9652 Error_Pragma ("?duplicate pragma%!");
9654 Set_Has_Pragma_Preelab_Init (Ent);
9658 --------------------
9659 -- Persistent_BSS --
9660 --------------------
9662 when Pragma_Persistent_BSS => Persistent_BSS : declare
9669 Check_At_Most_N_Arguments (1);
9671 -- Case of application to specific object (one argument)
9673 if Arg_Count = 1 then
9674 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9676 if not Is_Entity_Name (Expression (Arg1))
9678 (Ekind (Entity (Expression (Arg1))) /= E_Variable
9679 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
9681 Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
9684 Ent := Entity (Expression (Arg1));
9685 Decl := Parent (Ent);
9687 if Rep_Item_Too_Late (Ent, N) then
9691 if Present (Expression (Decl)) then
9693 ("object for pragma% cannot have initialization", Arg1);
9696 if not Is_Potentially_Persistent_Type (Etype (Ent)) then
9698 ("object type for pragma% is not potentially persistent",
9703 Make_Linker_Section_Pragma
9704 (Ent, Sloc (N), ".persistent.bss");
9705 Insert_After (N, Prag);
9708 -- Case of use as configuration pragma with no arguments
9711 Check_Valid_Configuration_Pragma;
9712 Persistent_BSS_Mode := True;
9720 -- pragma Polling (ON | OFF);
9722 when Pragma_Polling =>
9724 Check_Arg_Count (1);
9725 Check_No_Identifiers;
9726 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9727 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
9733 -- pragma Postcondition ([Check =>] Boolean_Expression
9734 -- [,[Message =>] String_Expression]);
9736 when Pragma_Postcondition => Postcondition : declare
9738 pragma Warnings (Off, In_Body);
9742 Check_At_Least_N_Arguments (1);
9743 Check_At_Most_N_Arguments (2);
9744 Check_Optional_Identifier (Arg1, Name_Check);
9746 -- All we need to do here is call the common check procedure,
9747 -- the remainder of the processing is found in Sem_Ch6/Sem_Ch7.
9749 Check_Precondition_Postcondition (In_Body);
9756 -- pragma Precondition ([Check =>] Boolean_Expression
9757 -- [,[Message =>] String_Expression]);
9759 when Pragma_Precondition => Precondition : declare
9764 Check_At_Least_N_Arguments (1);
9765 Check_At_Most_N_Arguments (2);
9766 Check_Optional_Identifier (Arg1, Name_Check);
9768 Check_Precondition_Postcondition (In_Body);
9770 -- If in spec, nothing more to do. If in body, then we convert the
9771 -- pragma to pragma Check (Precondition, cond [, msg]). Note we do
9772 -- this whether or not precondition checks are enabled. That works
9773 -- fine since pragma Check will do this check, and will also
9774 -- analyze the condition itself in the proper context.
9777 if Arg_Count = 2 then
9778 Check_Optional_Identifier (Arg3, Name_Message);
9779 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
9784 Chars => Name_Check,
9785 Pragma_Argument_Associations => New_List (
9786 Make_Pragma_Argument_Association (Loc,
9788 Make_Identifier (Loc,
9789 Chars => Name_Precondition)),
9791 Make_Pragma_Argument_Association (Sloc (Arg1),
9792 Expression => Relocate_Node (Get_Pragma_Arg (Arg1))))));
9794 if Arg_Count = 2 then
9795 Append_To (Pragma_Argument_Associations (N),
9796 Make_Pragma_Argument_Association (Sloc (Arg2),
9797 Expression => Relocate_Node (Get_Pragma_Arg (Arg2))));
9808 -- pragma Preelaborate [(library_unit_NAME)];
9810 -- Set the flag Is_Preelaborated of program unit name entity
9812 when Pragma_Preelaborate => Preelaborate : declare
9813 Pa : constant Node_Id := Parent (N);
9814 Pk : constant Node_Kind := Nkind (Pa);
9818 Check_Ada_83_Warning;
9819 Check_Valid_Library_Unit_Pragma;
9821 if Nkind (N) = N_Null_Statement then
9825 Ent := Find_Lib_Unit_Name;
9827 -- This filters out pragmas inside generic parent then
9828 -- show up inside instantiation
9831 and then not (Pk = N_Package_Specification
9832 and then Present (Generic_Parent (Pa)))
9834 if not Debug_Flag_U then
9835 Set_Is_Preelaborated (Ent);
9836 Set_Suppress_Elaboration_Warnings (Ent);
9841 ---------------------
9842 -- Preelaborate_05 --
9843 ---------------------
9845 -- pragma Preelaborate_05 [(library_unit_NAME)];
9847 -- This pragma is useable only in GNAT_Mode, where it is used like
9848 -- pragma Preelaborate but it is only effective in Ada 2005 mode
9849 -- (otherwise it is ignored). This is used to implement AI-362 which
9850 -- recategorizes some run-time packages in Ada 2005 mode.
9852 when Pragma_Preelaborate_05 => Preelaborate_05 : declare
9857 Check_Valid_Library_Unit_Pragma;
9859 if not GNAT_Mode then
9860 Error_Pragma ("pragma% only available in GNAT mode");
9863 if Nkind (N) = N_Null_Statement then
9867 -- This is one of the few cases where we need to test the value of
9868 -- Ada_Version_Explicit rather than Ada_Version (which is always
9869 -- set to Ada_05 in a predefined unit), we need to know the
9870 -- explicit version set to know if this pragma is active.
9872 if Ada_Version_Explicit >= Ada_05 then
9873 Ent := Find_Lib_Unit_Name;
9874 Set_Is_Preelaborated (Ent);
9875 Set_Suppress_Elaboration_Warnings (Ent);
9877 end Preelaborate_05;
9883 -- pragma Priority (EXPRESSION);
9885 when Pragma_Priority => Priority : declare
9886 P : constant Node_Id := Parent (N);
9890 Check_No_Identifiers;
9891 Check_Arg_Count (1);
9895 if Nkind (P) = N_Subprogram_Body then
9896 Check_In_Main_Program;
9898 Arg := Expression (Arg1);
9899 Analyze_And_Resolve (Arg, Standard_Integer);
9903 if not Is_Static_Expression (Arg) then
9904 Flag_Non_Static_Expr
9905 ("main subprogram priority is not static!", Arg);
9908 -- If constraint error, then we already signalled an error
9910 elsif Raises_Constraint_Error (Arg) then
9913 -- Otherwise check in range
9917 Val : constant Uint := Expr_Value (Arg);
9921 or else Val > Expr_Value (Expression
9922 (Parent (RTE (RE_Max_Priority))))
9925 ("main subprogram priority is out of range", Arg1);
9931 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
9933 -- Load an arbitrary entity from System.Tasking to make sure
9934 -- this package is implicitly with'ed, since we need to have
9935 -- the tasking run-time active for the pragma Priority to have
9939 Discard : Entity_Id;
9940 pragma Warnings (Off, Discard);
9942 Discard := RTE (RE_Task_List);
9945 -- Task or Protected, must be of type Integer
9947 elsif Nkind_In (P, N_Protected_Definition, N_Task_Definition) then
9948 Arg := Expression (Arg1);
9950 -- The expression must be analyzed in the special manner
9951 -- described in "Handling of Default and Per-Object
9952 -- Expressions" in sem.ads.
9954 Preanalyze_Spec_Expression (Arg, Standard_Integer);
9956 if not Is_Static_Expression (Arg) then
9957 Check_Restriction (Static_Priorities, Arg);
9960 -- Anything else is incorrect
9966 if Has_Priority_Pragma (P) then
9967 Error_Pragma ("duplicate pragma% not allowed");
9969 Set_Has_Priority_Pragma (P, True);
9971 if Nkind_In (P, N_Protected_Definition, N_Task_Definition) then
9972 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9973 -- exp_ch9 should use this ???
9978 -----------------------------------
9979 -- Priority_Specific_Dispatching --
9980 -----------------------------------
9982 -- pragma Priority_Specific_Dispatching (
9983 -- policy_IDENTIFIER,
9984 -- first_priority_EXPRESSION,
9985 -- last_priority_EXPRESSION);
9987 when Pragma_Priority_Specific_Dispatching =>
9988 Priority_Specific_Dispatching : declare
9989 Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
9990 -- This is the entity System.Any_Priority;
9993 Lower_Bound : Node_Id;
9994 Upper_Bound : Node_Id;
10000 Check_Arg_Count (3);
10001 Check_No_Identifiers;
10002 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
10003 Check_Valid_Configuration_Pragma;
10004 Get_Name_String (Chars (Expression (Arg1)));
10005 DP := Fold_Upper (Name_Buffer (1));
10007 Lower_Bound := Expression (Arg2);
10008 Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
10009 Lower_Val := Expr_Value (Lower_Bound);
10011 Upper_Bound := Expression (Arg3);
10012 Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
10013 Upper_Val := Expr_Value (Upper_Bound);
10015 -- It is not allowed to use Task_Dispatching_Policy and
10016 -- Priority_Specific_Dispatching in the same partition.
10018 if Task_Dispatching_Policy /= ' ' then
10019 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
10021 ("pragma% incompatible with Task_Dispatching_Policy#");
10023 -- Check lower bound in range
10025 elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
10027 Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
10030 ("first_priority is out of range", Arg2);
10032 -- Check upper bound in range
10034 elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
10036 Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
10039 ("last_priority is out of range", Arg3);
10041 -- Check that the priority range is valid
10043 elsif Lower_Val > Upper_Val then
10045 ("last_priority_expression must be greater than" &
10046 " or equal to first_priority_expression");
10048 -- Store the new policy, but always preserve System_Location since
10049 -- we like the error message with the run-time name.
10052 -- Check overlapping in the priority ranges specified in other
10053 -- Priority_Specific_Dispatching pragmas within the same
10054 -- partition. We can only check those we know about!
10057 Specific_Dispatching.First .. Specific_Dispatching.Last
10059 if Specific_Dispatching.Table (J).First_Priority in
10060 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
10061 or else Specific_Dispatching.Table (J).Last_Priority in
10062 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
10065 Specific_Dispatching.Table (J).Pragma_Loc;
10067 ("priority range overlaps with "
10068 & "Priority_Specific_Dispatching#");
10072 -- The use of Priority_Specific_Dispatching is incompatible
10073 -- with Task_Dispatching_Policy.
10075 if Task_Dispatching_Policy /= ' ' then
10076 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
10078 ("Priority_Specific_Dispatching incompatible "
10079 & "with Task_Dispatching_Policy#");
10082 -- The use of Priority_Specific_Dispatching forces ceiling
10085 if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
10086 Error_Msg_Sloc := Locking_Policy_Sloc;
10088 ("Priority_Specific_Dispatching incompatible "
10089 & "with Locking_Policy#");
10091 -- Set the Ceiling_Locking policy, but preserve System_Location
10092 -- since we like the error message with the run time name.
10095 Locking_Policy := 'C';
10097 if Locking_Policy_Sloc /= System_Location then
10098 Locking_Policy_Sloc := Loc;
10102 -- Add entry in the table
10104 Specific_Dispatching.Append
10105 ((Dispatching_Policy => DP,
10106 First_Priority => UI_To_Int (Lower_Val),
10107 Last_Priority => UI_To_Int (Upper_Val),
10108 Pragma_Loc => Loc));
10110 end Priority_Specific_Dispatching;
10116 -- pragma Profile (profile_IDENTIFIER);
10118 -- profile_IDENTIFIER => Restricted | Ravenscar
10120 when Pragma_Profile =>
10122 Check_Arg_Count (1);
10123 Check_Valid_Configuration_Pragma;
10124 Check_No_Identifiers;
10127 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
10129 if Chars (Argx) = Name_Ravenscar then
10130 Set_Ravenscar_Profile (N);
10131 elsif Chars (Argx) = Name_Restricted then
10132 Set_Profile_Restrictions
10133 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
10135 Error_Pragma_Arg ("& is not a valid profile", Argx);
10139 ----------------------
10140 -- Profile_Warnings --
10141 ----------------------
10143 -- pragma Profile_Warnings (profile_IDENTIFIER);
10145 -- profile_IDENTIFIER => Restricted | Ravenscar
10147 when Pragma_Profile_Warnings =>
10149 Check_Arg_Count (1);
10150 Check_Valid_Configuration_Pragma;
10151 Check_No_Identifiers;
10154 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
10156 if Chars (Argx) = Name_Ravenscar then
10157 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
10158 elsif Chars (Argx) = Name_Restricted then
10159 Set_Profile_Restrictions (Restricted, N, Warn => True);
10161 Error_Pragma_Arg ("& is not a valid profile", Argx);
10165 --------------------------
10166 -- Propagate_Exceptions --
10167 --------------------------
10169 -- pragma Propagate_Exceptions;
10171 -- Note: this pragma is obsolete and has no effect
10173 when Pragma_Propagate_Exceptions =>
10175 Check_Arg_Count (0);
10177 if In_Extended_Main_Source_Unit (N) then
10178 Propagate_Exceptions := True;
10185 -- pragma Psect_Object (
10186 -- [Internal =>] LOCAL_NAME,
10187 -- [, [External =>] EXTERNAL_SYMBOL]
10188 -- [, [Size =>] EXTERNAL_SYMBOL]);
10190 when Pragma_Psect_Object | Pragma_Common_Object =>
10191 Psect_Object : declare
10192 Args : Args_List (1 .. 3);
10193 Names : constant Name_List (1 .. 3) := (
10198 Internal : Node_Id renames Args (1);
10199 External : Node_Id renames Args (2);
10200 Size : Node_Id renames Args (3);
10202 Def_Id : Entity_Id;
10204 procedure Check_Too_Long (Arg : Node_Id);
10205 -- Posts message if the argument is an identifier with more
10206 -- than 31 characters, or a string literal with more than
10207 -- 31 characters, and we are operating under VMS
10209 --------------------
10210 -- Check_Too_Long --
10211 --------------------
10213 procedure Check_Too_Long (Arg : Node_Id) is
10214 X : constant Node_Id := Original_Node (Arg);
10217 if not Nkind_In (X, N_String_Literal, N_Identifier) then
10219 ("inappropriate argument for pragma %", Arg);
10222 if OpenVMS_On_Target then
10223 if (Nkind (X) = N_String_Literal
10224 and then String_Length (Strval (X)) > 31)
10226 (Nkind (X) = N_Identifier
10227 and then Length_Of_Name (Chars (X)) > 31)
10230 ("argument for pragma % is longer than 31 characters",
10234 end Check_Too_Long;
10236 -- Start of processing for Common_Object/Psect_Object
10240 Gather_Associations (Names, Args);
10241 Process_Extended_Import_Export_Internal_Arg (Internal);
10243 Def_Id := Entity (Internal);
10245 if Ekind (Def_Id) /= E_Constant
10246 and then Ekind (Def_Id) /= E_Variable
10249 ("pragma% must designate an object", Internal);
10252 Check_Too_Long (Internal);
10254 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
10256 ("cannot use pragma% for imported/exported object",
10260 if Is_Concurrent_Type (Etype (Internal)) then
10262 ("cannot specify pragma % for task/protected object",
10266 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
10268 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
10270 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
10273 if Ekind (Def_Id) = E_Constant then
10275 ("cannot specify pragma % for a constant", Internal);
10278 if Is_Record_Type (Etype (Internal)) then
10284 Ent := First_Entity (Etype (Internal));
10285 while Present (Ent) loop
10286 Decl := Declaration_Node (Ent);
10288 if Ekind (Ent) = E_Component
10289 and then Nkind (Decl) = N_Component_Declaration
10290 and then Present (Expression (Decl))
10291 and then Warn_On_Export_Import
10294 ("?object for pragma % has defaults", Internal);
10304 if Present (Size) then
10305 Check_Too_Long (Size);
10308 if Present (External) then
10309 Check_Arg_Is_External_Name (External);
10310 Check_Too_Long (External);
10313 -- If all error tests pass, link pragma on to the rep item chain
10315 Record_Rep_Item (Def_Id, N);
10322 -- pragma Pure [(library_unit_NAME)];
10324 when Pragma_Pure => Pure : declare
10328 Check_Ada_83_Warning;
10329 Check_Valid_Library_Unit_Pragma;
10331 if Nkind (N) = N_Null_Statement then
10335 Ent := Find_Lib_Unit_Name;
10337 Set_Has_Pragma_Pure (Ent);
10338 Set_Suppress_Elaboration_Warnings (Ent);
10345 -- pragma Pure_05 [(library_unit_NAME)];
10347 -- This pragma is useable only in GNAT_Mode, where it is used like
10348 -- pragma Pure but it is only effective in Ada 2005 mode (otherwise
10349 -- it is ignored). It may be used after a pragma Preelaborate, in
10350 -- which case it overrides the effect of the pragma Preelaborate.
10351 -- This is used to implement AI-362 which recategorizes some run-time
10352 -- packages in Ada 2005 mode.
10354 when Pragma_Pure_05 => Pure_05 : declare
10359 Check_Valid_Library_Unit_Pragma;
10361 if not GNAT_Mode then
10362 Error_Pragma ("pragma% only available in GNAT mode");
10365 if Nkind (N) = N_Null_Statement then
10369 -- This is one of the few cases where we need to test the value of
10370 -- Ada_Version_Explicit rather than Ada_Version (which is always
10371 -- set to Ada_05 in a predefined unit), we need to know the
10372 -- explicit version set to know if this pragma is active.
10374 if Ada_Version_Explicit >= Ada_05 then
10375 Ent := Find_Lib_Unit_Name;
10376 Set_Is_Preelaborated (Ent, False);
10378 Set_Suppress_Elaboration_Warnings (Ent);
10382 -------------------
10383 -- Pure_Function --
10384 -------------------
10386 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
10388 when Pragma_Pure_Function => Pure_Function : declare
10391 Def_Id : Entity_Id;
10392 Effective : Boolean := False;
10396 Check_Arg_Count (1);
10397 Check_Optional_Identifier (Arg1, Name_Entity);
10398 Check_Arg_Is_Local_Name (Arg1);
10399 E_Id := Expression (Arg1);
10401 if Error_Posted (E_Id) then
10405 -- Loop through homonyms (overloadings) of referenced entity
10407 E := Entity (E_Id);
10409 if Present (E) then
10411 Def_Id := Get_Base_Subprogram (E);
10413 if Ekind (Def_Id) /= E_Function
10414 and then Ekind (Def_Id) /= E_Generic_Function
10415 and then Ekind (Def_Id) /= E_Operator
10418 ("pragma% requires a function name", Arg1);
10421 Set_Is_Pure (Def_Id);
10423 if not Has_Pragma_Pure_Function (Def_Id) then
10424 Set_Has_Pragma_Pure_Function (Def_Id);
10429 exit when No (E) or else Scope (E) /= Current_Scope;
10433 and then Warn_On_Redundant_Constructs
10435 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
10441 --------------------
10442 -- Queuing_Policy --
10443 --------------------
10445 -- pragma Queuing_Policy (policy_IDENTIFIER);
10447 when Pragma_Queuing_Policy => declare
10451 Check_Ada_83_Warning;
10452 Check_Arg_Count (1);
10453 Check_No_Identifiers;
10454 Check_Arg_Is_Queuing_Policy (Arg1);
10455 Check_Valid_Configuration_Pragma;
10456 Get_Name_String (Chars (Expression (Arg1)));
10457 QP := Fold_Upper (Name_Buffer (1));
10459 if Queuing_Policy /= ' '
10460 and then Queuing_Policy /= QP
10462 Error_Msg_Sloc := Queuing_Policy_Sloc;
10463 Error_Pragma ("queuing policy incompatible with policy#");
10465 -- Set new policy, but always preserve System_Location since we
10466 -- like the error message with the run time name.
10469 Queuing_Policy := QP;
10471 if Queuing_Policy_Sloc /= System_Location then
10472 Queuing_Policy_Sloc := Loc;
10477 -----------------------
10478 -- Relative_Deadline --
10479 -----------------------
10481 -- pragma Relative_Deadline (time_span_EXPRESSION);
10483 when Pragma_Relative_Deadline => Relative_Deadline : declare
10484 P : constant Node_Id := Parent (N);
10489 Check_No_Identifiers;
10490 Check_Arg_Count (1);
10492 Arg := Expression (Arg1);
10494 -- The expression must be analyzed in the special manner described
10495 -- in "Handling of Default and Per-Object Expressions" in sem.ads.
10497 Preanalyze_Spec_Expression (Arg, RTE (RE_Time_Span));
10501 if Nkind (P) = N_Subprogram_Body then
10502 Check_In_Main_Program;
10506 elsif Nkind (P) = N_Task_Definition then
10509 -- Anything else is incorrect
10515 if Has_Relative_Deadline_Pragma (P) then
10516 Error_Pragma ("duplicate pragma% not allowed");
10518 Set_Has_Relative_Deadline_Pragma (P, True);
10520 if Nkind (P) = N_Task_Definition then
10521 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10524 end Relative_Deadline;
10526 ---------------------------
10527 -- Remote_Call_Interface --
10528 ---------------------------
10530 -- pragma Remote_Call_Interface [(library_unit_NAME)];
10532 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
10533 Cunit_Node : Node_Id;
10534 Cunit_Ent : Entity_Id;
10538 Check_Ada_83_Warning;
10539 Check_Valid_Library_Unit_Pragma;
10541 if Nkind (N) = N_Null_Statement then
10545 Cunit_Node := Cunit (Current_Sem_Unit);
10546 K := Nkind (Unit (Cunit_Node));
10547 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10549 if K = N_Package_Declaration
10550 or else K = N_Generic_Package_Declaration
10551 or else K = N_Subprogram_Declaration
10552 or else K = N_Generic_Subprogram_Declaration
10553 or else (K = N_Subprogram_Body
10554 and then Acts_As_Spec (Unit (Cunit_Node)))
10559 "pragma% must apply to package or subprogram declaration");
10562 Set_Is_Remote_Call_Interface (Cunit_Ent);
10563 end Remote_Call_Interface;
10569 -- pragma Remote_Types [(library_unit_NAME)];
10571 when Pragma_Remote_Types => Remote_Types : declare
10572 Cunit_Node : Node_Id;
10573 Cunit_Ent : Entity_Id;
10576 Check_Ada_83_Warning;
10577 Check_Valid_Library_Unit_Pragma;
10579 if Nkind (N) = N_Null_Statement then
10583 Cunit_Node := Cunit (Current_Sem_Unit);
10584 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10586 if not Nkind_In (Unit (Cunit_Node), N_Package_Declaration,
10587 N_Generic_Package_Declaration)
10590 ("pragma% can only apply to a package declaration");
10593 Set_Is_Remote_Types (Cunit_Ent);
10600 -- pragma Ravenscar;
10602 when Pragma_Ravenscar =>
10604 Check_Arg_Count (0);
10605 Check_Valid_Configuration_Pragma;
10606 Set_Ravenscar_Profile (N);
10608 if Warn_On_Obsolescent_Feature then
10610 ("pragma Ravenscar is an obsolescent feature?", N);
10612 ("|use pragma Profile (Ravenscar) instead", N);
10615 -------------------------
10616 -- Restricted_Run_Time --
10617 -------------------------
10619 -- pragma Restricted_Run_Time;
10621 when Pragma_Restricted_Run_Time =>
10623 Check_Arg_Count (0);
10624 Check_Valid_Configuration_Pragma;
10625 Set_Profile_Restrictions
10626 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
10628 if Warn_On_Obsolescent_Feature then
10630 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
10632 ("|use pragma Profile (Restricted) instead", N);
10639 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
10642 -- restriction_IDENTIFIER
10643 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10645 when Pragma_Restrictions =>
10646 Process_Restrictions_Or_Restriction_Warnings
10647 (Warn => Treat_Restrictions_As_Warnings);
10649 --------------------------
10650 -- Restriction_Warnings --
10651 --------------------------
10653 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
10656 -- restriction_IDENTIFIER
10657 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10659 when Pragma_Restriction_Warnings =>
10661 Process_Restrictions_Or_Restriction_Warnings (Warn => True);
10667 -- pragma Reviewable;
10669 when Pragma_Reviewable =>
10670 Check_Ada_83_Warning;
10671 Check_Arg_Count (0);
10673 -- Call dummy debugging function rv. This is done to assist front
10674 -- end debugging. By placing a Reviewable pragma in the source
10675 -- program, a breakpoint on rv catches this place in the source,
10676 -- allowing convenient stepping to the point of interest.
10680 --------------------------
10681 -- Short_Circuit_And_Or --
10682 --------------------------
10684 when Pragma_Short_Circuit_And_Or =>
10686 Check_Arg_Count (0);
10687 Check_Valid_Configuration_Pragma;
10688 Short_Circuit_And_Or := True;
10690 -------------------
10691 -- Share_Generic --
10692 -------------------
10694 -- pragma Share_Generic (NAME {, NAME});
10696 when Pragma_Share_Generic =>
10698 Process_Generic_List;
10704 -- pragma Shared (LOCAL_NAME);
10706 when Pragma_Shared =>
10708 Process_Atomic_Shared_Volatile;
10710 --------------------
10711 -- Shared_Passive --
10712 --------------------
10714 -- pragma Shared_Passive [(library_unit_NAME)];
10716 -- Set the flag Is_Shared_Passive of program unit name entity
10718 when Pragma_Shared_Passive => Shared_Passive : declare
10719 Cunit_Node : Node_Id;
10720 Cunit_Ent : Entity_Id;
10723 Check_Ada_83_Warning;
10724 Check_Valid_Library_Unit_Pragma;
10726 if Nkind (N) = N_Null_Statement then
10730 Cunit_Node := Cunit (Current_Sem_Unit);
10731 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10733 if not Nkind_In (Unit (Cunit_Node), N_Package_Declaration,
10734 N_Generic_Package_Declaration)
10737 ("pragma% can only apply to a package declaration");
10740 Set_Is_Shared_Passive (Cunit_Ent);
10741 end Shared_Passive;
10743 ----------------------
10744 -- Source_File_Name --
10745 ----------------------
10747 -- There are five forms for this pragma:
10749 -- pragma Source_File_Name (
10750 -- [UNIT_NAME =>] unit_NAME,
10751 -- BODY_FILE_NAME => STRING_LITERAL
10752 -- [, [INDEX =>] INTEGER_LITERAL]);
10754 -- pragma Source_File_Name (
10755 -- [UNIT_NAME =>] unit_NAME,
10756 -- SPEC_FILE_NAME => STRING_LITERAL
10757 -- [, [INDEX =>] INTEGER_LITERAL]);
10759 -- pragma Source_File_Name (
10760 -- BODY_FILE_NAME => STRING_LITERAL
10761 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10762 -- [, CASING => CASING_SPEC]);
10764 -- pragma Source_File_Name (
10765 -- SPEC_FILE_NAME => STRING_LITERAL
10766 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10767 -- [, CASING => CASING_SPEC]);
10769 -- pragma Source_File_Name (
10770 -- SUBUNIT_FILE_NAME => STRING_LITERAL
10771 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10772 -- [, CASING => CASING_SPEC]);
10774 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
10776 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
10777 -- Source_File_Name (SFN), however their usage is exclusive: SFN can
10778 -- only be used when no project file is used, while SFNP can only be
10779 -- used when a project file is used.
10781 -- No processing here. Processing was completed during parsing, since
10782 -- we need to have file names set as early as possible. Units are
10783 -- loaded well before semantic processing starts.
10785 -- The only processing we defer to this point is the check for
10786 -- correct placement.
10788 when Pragma_Source_File_Name =>
10790 Check_Valid_Configuration_Pragma;
10792 ------------------------------
10793 -- Source_File_Name_Project --
10794 ------------------------------
10796 -- See Source_File_Name for syntax
10798 -- No processing here. Processing was completed during parsing, since
10799 -- we need to have file names set as early as possible. Units are
10800 -- loaded well before semantic processing starts.
10802 -- The only processing we defer to this point is the check for
10803 -- correct placement.
10805 when Pragma_Source_File_Name_Project =>
10807 Check_Valid_Configuration_Pragma;
10809 -- Check that a pragma Source_File_Name_Project is used only in a
10810 -- configuration pragmas file.
10812 -- Pragmas Source_File_Name_Project should only be generated by
10813 -- the Project Manager in configuration pragmas files.
10815 -- This is really an ugly test. It seems to depend on some
10816 -- accidental and undocumented property. At the very least it
10817 -- needs to be documented, but it would be better to have a
10818 -- clean way of testing if we are in a configuration file???
10820 if Present (Parent (N)) then
10822 ("pragma% can only appear in a configuration pragmas file");
10825 ----------------------
10826 -- Source_Reference --
10827 ----------------------
10829 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
10831 -- Nothing to do, all processing completed in Par.Prag, since we need
10832 -- the information for possible parser messages that are output.
10834 when Pragma_Source_Reference =>
10837 --------------------------------
10838 -- Static_Elaboration_Desired --
10839 --------------------------------
10841 -- pragma Static_Elaboration_Desired (DIRECT_NAME);
10843 when Pragma_Static_Elaboration_Desired =>
10845 Check_At_Most_N_Arguments (1);
10847 if Is_Compilation_Unit (Current_Scope)
10848 and then Ekind (Current_Scope) = E_Package
10850 Set_Static_Elaboration_Desired (Current_Scope, True);
10852 Error_Pragma ("pragma% must apply to a library-level package");
10859 -- pragma Storage_Size (EXPRESSION);
10861 when Pragma_Storage_Size => Storage_Size : declare
10862 P : constant Node_Id := Parent (N);
10866 Check_No_Identifiers;
10867 Check_Arg_Count (1);
10869 -- The expression must be analyzed in the special manner described
10870 -- in "Handling of Default Expressions" in sem.ads.
10872 Arg := Expression (Arg1);
10873 Preanalyze_Spec_Expression (Arg, Any_Integer);
10875 if not Is_Static_Expression (Arg) then
10876 Check_Restriction (Static_Storage_Size, Arg);
10879 if Nkind (P) /= N_Task_Definition then
10884 if Has_Storage_Size_Pragma (P) then
10885 Error_Pragma ("duplicate pragma% not allowed");
10887 Set_Has_Storage_Size_Pragma (P, True);
10890 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10891 -- ??? exp_ch9 should use this!
10899 -- pragma Storage_Unit (NUMERIC_LITERAL);
10901 -- Only permitted argument is System'Storage_Unit value
10903 when Pragma_Storage_Unit =>
10904 Check_No_Identifiers;
10905 Check_Arg_Count (1);
10906 Check_Arg_Is_Integer_Literal (Arg1);
10908 if Intval (Expression (Arg1)) /=
10909 UI_From_Int (Ttypes.System_Storage_Unit)
10911 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
10913 ("the only allowed argument for pragma% is ^", Arg1);
10916 --------------------
10917 -- Stream_Convert --
10918 --------------------
10920 -- pragma Stream_Convert (
10921 -- [Entity =>] type_LOCAL_NAME,
10922 -- [Read =>] function_NAME,
10923 -- [Write =>] function NAME);
10925 when Pragma_Stream_Convert => Stream_Convert : declare
10927 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
10928 -- Check that the given argument is the name of a local function
10929 -- of one argument that is not overloaded earlier in the current
10930 -- local scope. A check is also made that the argument is a
10931 -- function with one parameter.
10933 --------------------------------------
10934 -- Check_OK_Stream_Convert_Function --
10935 --------------------------------------
10937 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
10941 Check_Arg_Is_Local_Name (Arg);
10942 Ent := Entity (Expression (Arg));
10944 if Has_Homonym (Ent) then
10946 ("argument for pragma% may not be overloaded", Arg);
10949 if Ekind (Ent) /= E_Function
10950 or else No (First_Formal (Ent))
10951 or else Present (Next_Formal (First_Formal (Ent)))
10954 ("argument for pragma% must be" &
10955 " function of one argument", Arg);
10957 end Check_OK_Stream_Convert_Function;
10959 -- Start of processing for Stream_Convert
10963 Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
10964 Check_Arg_Count (3);
10965 Check_Optional_Identifier (Arg1, Name_Entity);
10966 Check_Optional_Identifier (Arg2, Name_Read);
10967 Check_Optional_Identifier (Arg3, Name_Write);
10968 Check_Arg_Is_Local_Name (Arg1);
10969 Check_OK_Stream_Convert_Function (Arg2);
10970 Check_OK_Stream_Convert_Function (Arg3);
10973 Typ : constant Entity_Id :=
10974 Underlying_Type (Entity (Expression (Arg1)));
10975 Read : constant Entity_Id := Entity (Expression (Arg2));
10976 Write : constant Entity_Id := Entity (Expression (Arg3));
10979 Check_First_Subtype (Arg1);
10981 -- Check for too early or too late. Note that we don't enforce
10982 -- the rule about primitive operations in this case, since, as
10983 -- is the case for explicit stream attributes themselves, these
10984 -- restrictions are not appropriate. Note that the chaining of
10985 -- the pragma by Rep_Item_Too_Late is actually the critical
10986 -- processing done for this pragma.
10988 if Rep_Item_Too_Early (Typ, N)
10990 Rep_Item_Too_Late (Typ, N, FOnly => True)
10995 -- Return if previous error
10997 if Etype (Typ) = Any_Type
10999 Etype (Read) = Any_Type
11001 Etype (Write) = Any_Type
11008 if Underlying_Type (Etype (Read)) /= Typ then
11010 ("incorrect return type for function&", Arg2);
11013 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
11015 ("incorrect parameter type for function&", Arg3);
11018 if Underlying_Type (Etype (First_Formal (Read))) /=
11019 Underlying_Type (Etype (Write))
11022 ("result type of & does not match Read parameter type",
11026 end Stream_Convert;
11028 -------------------------
11029 -- Style_Checks (GNAT) --
11030 -------------------------
11032 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
11034 -- This is processed by the parser since some of the style checks
11035 -- take place during source scanning and parsing. This means that
11036 -- we don't need to issue error messages here.
11038 when Pragma_Style_Checks => Style_Checks : declare
11039 A : constant Node_Id := Expression (Arg1);
11045 Check_No_Identifiers;
11047 -- Two argument form
11049 if Arg_Count = 2 then
11050 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
11057 E_Id := Expression (Arg2);
11060 if not Is_Entity_Name (E_Id) then
11062 ("second argument of pragma% must be entity name",
11066 E := Entity (E_Id);
11072 Set_Suppress_Style_Checks (E,
11073 (Chars (Expression (Arg1)) = Name_Off));
11074 exit when No (Homonym (E));
11080 -- One argument form
11083 Check_Arg_Count (1);
11085 if Nkind (A) = N_String_Literal then
11089 Slen : constant Natural := Natural (String_Length (S));
11090 Options : String (1 .. Slen);
11096 C := Get_String_Char (S, Int (J));
11097 exit when not In_Character_Range (C);
11098 Options (J) := Get_Character (C);
11100 -- If at end of string, set options. As per discussion
11101 -- above, no need to check for errors, since we issued
11102 -- them in the parser.
11105 Set_Style_Check_Options (Options);
11113 elsif Nkind (A) = N_Identifier then
11114 if Chars (A) = Name_All_Checks then
11115 Set_Default_Style_Check_Options;
11117 elsif Chars (A) = Name_On then
11118 Style_Check := True;
11120 elsif Chars (A) = Name_Off then
11121 Style_Check := False;
11131 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
11133 when Pragma_Subtitle =>
11135 Check_Arg_Count (1);
11136 Check_Optional_Identifier (Arg1, Name_Subtitle);
11137 Check_Arg_Is_String_Literal (Arg1);
11143 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
11145 when Pragma_Suppress =>
11146 Process_Suppress_Unsuppress (True);
11152 -- pragma Suppress_All;
11154 -- The only check made here is that the pragma appears in the proper
11155 -- place, i.e. following a compilation unit. If indeed it appears in
11156 -- this context, then the parser has already inserted an equivalent
11157 -- pragma Suppress (All_Checks) to get the required effect.
11159 when Pragma_Suppress_All =>
11161 Check_Arg_Count (0);
11163 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
11164 or else not Is_List_Member (N)
11165 or else List_Containing (N) /= Pragmas_After (Parent (N))
11168 ("misplaced pragma%, must follow compilation unit");
11171 -------------------------
11172 -- Suppress_Debug_Info --
11173 -------------------------
11175 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
11177 when Pragma_Suppress_Debug_Info =>
11179 Check_Arg_Count (1);
11180 Check_Optional_Identifier (Arg1, Name_Entity);
11181 Check_Arg_Is_Local_Name (Arg1);
11182 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
11184 ----------------------------------
11185 -- Suppress_Exception_Locations --
11186 ----------------------------------
11188 -- pragma Suppress_Exception_Locations;
11190 when Pragma_Suppress_Exception_Locations =>
11192 Check_Arg_Count (0);
11193 Check_Valid_Configuration_Pragma;
11194 Exception_Locations_Suppressed := True;
11196 -----------------------------
11197 -- Suppress_Initialization --
11198 -----------------------------
11200 -- pragma Suppress_Initialization ([Entity =>] type_Name);
11202 when Pragma_Suppress_Initialization => Suppress_Init : declare
11208 Check_Arg_Count (1);
11209 Check_Optional_Identifier (Arg1, Name_Entity);
11210 Check_Arg_Is_Local_Name (Arg1);
11212 E_Id := Expression (Arg1);
11214 if Etype (E_Id) = Any_Type then
11218 E := Entity (E_Id);
11220 if Is_Type (E) then
11221 if Is_Incomplete_Or_Private_Type (E) then
11222 if No (Full_View (Base_Type (E))) then
11224 ("argument of pragma% cannot be an incomplete type",
11227 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
11230 Set_Suppress_Init_Proc (Base_Type (E));
11235 ("pragma% requires argument that is a type name", Arg1);
11243 -- pragma System_Name (DIRECT_NAME);
11245 -- Syntax check: one argument, which must be the identifier GNAT or
11246 -- the identifier GCC, no other identifiers are acceptable.
11248 when Pragma_System_Name =>
11250 Check_No_Identifiers;
11251 Check_Arg_Count (1);
11252 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
11254 -----------------------------
11255 -- Task_Dispatching_Policy --
11256 -----------------------------
11258 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
11260 when Pragma_Task_Dispatching_Policy => declare
11264 Check_Ada_83_Warning;
11265 Check_Arg_Count (1);
11266 Check_No_Identifiers;
11267 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
11268 Check_Valid_Configuration_Pragma;
11269 Get_Name_String (Chars (Expression (Arg1)));
11270 DP := Fold_Upper (Name_Buffer (1));
11272 if Task_Dispatching_Policy /= ' '
11273 and then Task_Dispatching_Policy /= DP
11275 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
11277 ("task dispatching policy incompatible with policy#");
11279 -- Set new policy, but always preserve System_Location since we
11280 -- like the error message with the run time name.
11283 Task_Dispatching_Policy := DP;
11285 if Task_Dispatching_Policy_Sloc /= System_Location then
11286 Task_Dispatching_Policy_Sloc := Loc;
11295 -- pragma Task_Info (EXPRESSION);
11297 when Pragma_Task_Info => Task_Info : declare
11298 P : constant Node_Id := Parent (N);
11303 if Nkind (P) /= N_Task_Definition then
11304 Error_Pragma ("pragma% must appear in task definition");
11307 Check_No_Identifiers;
11308 Check_Arg_Count (1);
11310 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
11312 if Etype (Expression (Arg1)) = Any_Type then
11316 if Has_Task_Info_Pragma (P) then
11317 Error_Pragma ("duplicate pragma% not allowed");
11319 Set_Has_Task_Info_Pragma (P, True);
11327 -- pragma Task_Name (string_EXPRESSION);
11329 when Pragma_Task_Name => Task_Name : declare
11330 P : constant Node_Id := Parent (N);
11334 Check_No_Identifiers;
11335 Check_Arg_Count (1);
11337 Arg := Expression (Arg1);
11339 -- The expression is used in the call to Create_Task, and must be
11340 -- expanded there, not in the context of the current spec. It must
11341 -- however be analyzed to capture global references, in case it
11342 -- appears in a generic context.
11344 Preanalyze_And_Resolve (Arg, Standard_String);
11346 if Nkind (P) /= N_Task_Definition then
11350 if Has_Task_Name_Pragma (P) then
11351 Error_Pragma ("duplicate pragma% not allowed");
11353 Set_Has_Task_Name_Pragma (P, True);
11354 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
11362 -- pragma Task_Storage (
11363 -- [Task_Type =>] LOCAL_NAME,
11364 -- [Top_Guard =>] static_integer_EXPRESSION);
11366 when Pragma_Task_Storage => Task_Storage : declare
11367 Args : Args_List (1 .. 2);
11368 Names : constant Name_List (1 .. 2) := (
11372 Task_Type : Node_Id renames Args (1);
11373 Top_Guard : Node_Id renames Args (2);
11379 Gather_Associations (Names, Args);
11381 if No (Task_Type) then
11383 ("missing task_type argument for pragma%");
11386 Check_Arg_Is_Local_Name (Task_Type);
11388 Ent := Entity (Task_Type);
11390 if not Is_Task_Type (Ent) then
11392 ("argument for pragma% must be task type", Task_Type);
11395 if No (Top_Guard) then
11397 ("pragma% takes two arguments", Task_Type);
11399 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
11402 Check_First_Subtype (Task_Type);
11404 if Rep_Item_Too_Late (Ent, N) then
11409 --------------------------
11410 -- Thread_Local_Storage --
11411 --------------------------
11413 -- pragma Thread_Local_Storage ([Entity =>] LOCAL_NAME);
11415 when Pragma_Thread_Local_Storage => Thread_Local_Storage : declare
11421 Check_Arg_Count (1);
11422 Check_Optional_Identifier (Arg1, Name_Entity);
11423 Check_Arg_Is_Library_Level_Local_Name (Arg1);
11425 Id := Expression (Arg1);
11428 if not Is_Entity_Name (Id)
11429 or else Ekind (Entity (Id)) /= E_Variable
11431 Error_Pragma_Arg ("local variable name required", Arg1);
11436 if Rep_Item_Too_Early (E, N)
11437 or else Rep_Item_Too_Late (E, N)
11442 Set_Has_Pragma_Thread_Local_Storage (E);
11443 Set_Has_Gigi_Rep_Item (E);
11444 end Thread_Local_Storage;
11450 -- pragma Time_Slice (static_duration_EXPRESSION);
11452 when Pragma_Time_Slice => Time_Slice : declare
11458 Check_Arg_Count (1);
11459 Check_No_Identifiers;
11460 Check_In_Main_Program;
11461 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
11463 if not Error_Posted (Arg1) then
11465 while Present (Nod) loop
11466 if Nkind (Nod) = N_Pragma
11467 and then Pragma_Name (Nod) = Name_Time_Slice
11469 Error_Msg_Name_1 := Pname;
11470 Error_Msg_N ("duplicate pragma% not permitted", Nod);
11477 -- Process only if in main unit
11479 if Get_Source_Unit (Loc) = Main_Unit then
11480 Opt.Time_Slice_Set := True;
11481 Val := Expr_Value_R (Expression (Arg1));
11483 if Val <= Ureal_0 then
11484 Opt.Time_Slice_Value := 0;
11486 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
11487 Opt.Time_Slice_Value := 1_000_000_000;
11490 Opt.Time_Slice_Value :=
11491 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
11500 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
11502 -- TITLING_OPTION ::=
11503 -- [Title =>] STRING_LITERAL
11504 -- | [Subtitle =>] STRING_LITERAL
11506 when Pragma_Title => Title : declare
11507 Args : Args_List (1 .. 2);
11508 Names : constant Name_List (1 .. 2) := (
11514 Gather_Associations (Names, Args);
11516 for J in 1 .. 2 loop
11517 if Present (Args (J)) then
11518 Check_Arg_Is_String_Literal (Args (J));
11523 ---------------------
11524 -- Unchecked_Union --
11525 ---------------------
11527 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
11529 when Pragma_Unchecked_Union => Unchecked_Union : declare
11530 Assoc : constant Node_Id := Arg1;
11531 Type_Id : constant Node_Id := Expression (Assoc);
11542 Check_No_Identifiers;
11543 Check_Arg_Count (1);
11544 Check_Arg_Is_Local_Name (Arg1);
11546 Find_Type (Type_Id);
11547 Typ := Entity (Type_Id);
11550 or else Rep_Item_Too_Early (Typ, N)
11554 Typ := Underlying_Type (Typ);
11557 if Rep_Item_Too_Late (Typ, N) then
11561 Check_First_Subtype (Arg1);
11563 -- Note remaining cases are references to a type in the current
11564 -- declarative part. If we find an error, we post the error on
11565 -- the relevant type declaration at an appropriate point.
11567 if not Is_Record_Type (Typ) then
11568 Error_Msg_N ("Unchecked_Union must be record type", Typ);
11571 elsif Is_Tagged_Type (Typ) then
11572 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
11575 elsif Is_Limited_Type (Typ) then
11577 ("Unchecked_Union must not be limited record type", Typ);
11578 Explain_Limited_Type (Typ, Typ);
11582 if not Has_Discriminants (Typ) then
11584 ("Unchecked_Union must have one discriminant", Typ);
11588 Discr := First_Discriminant (Typ);
11589 while Present (Discr) loop
11590 if No (Discriminant_Default_Value (Discr)) then
11592 ("Unchecked_Union discriminant must have default value",
11595 Next_Discriminant (Discr);
11598 Tdef := Type_Definition (Declaration_Node (Typ));
11599 Clist := Component_List (Tdef);
11601 Comp := First (Component_Items (Clist));
11602 while Present (Comp) loop
11603 Check_Component (Comp);
11607 if No (Clist) or else No (Variant_Part (Clist)) then
11609 ("Unchecked_Union must have variant part",
11614 Vpart := Variant_Part (Clist);
11616 Variant := First (Variants (Vpart));
11617 while Present (Variant) loop
11618 Check_Variant (Variant);
11623 Set_Is_Unchecked_Union (Typ, True);
11624 Set_Convention (Typ, Convention_C);
11626 Set_Has_Unchecked_Union (Base_Type (Typ), True);
11627 Set_Is_Unchecked_Union (Base_Type (Typ), True);
11628 end Unchecked_Union;
11630 ------------------------
11631 -- Unimplemented_Unit --
11632 ------------------------
11634 -- pragma Unimplemented_Unit;
11636 -- Note: this only gives an error if we are generating code, or if
11637 -- we are in a generic library unit (where the pragma appears in the
11638 -- body, not in the spec).
11640 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
11641 Cunitent : constant Entity_Id :=
11642 Cunit_Entity (Get_Source_Unit (Loc));
11643 Ent_Kind : constant Entity_Kind :=
11648 Check_Arg_Count (0);
11650 if Operating_Mode = Generate_Code
11651 or else Ent_Kind = E_Generic_Function
11652 or else Ent_Kind = E_Generic_Procedure
11653 or else Ent_Kind = E_Generic_Package
11655 Get_Name_String (Chars (Cunitent));
11656 Set_Casing (Mixed_Case);
11657 Write_Str (Name_Buffer (1 .. Name_Len));
11658 Write_Str (" is not supported in this configuration");
11660 raise Unrecoverable_Error;
11662 end Unimplemented_Unit;
11664 ------------------------
11665 -- Universal_Aliasing --
11666 ------------------------
11668 -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)];
11670 when Pragma_Universal_Aliasing => Universal_Alias : declare
11675 Check_Arg_Count (1);
11676 Check_Optional_Identifier (Arg2, Name_Entity);
11677 Check_Arg_Is_Local_Name (Arg1);
11678 E_Id := Entity (Expression (Arg1));
11680 if E_Id = Any_Type then
11682 elsif No (E_Id) or else not Is_Type (E_Id) then
11683 Error_Pragma_Arg ("pragma% requires type", Arg1);
11686 Set_Universal_Aliasing (Implementation_Base_Type (E_Id));
11687 end Universal_Alias;
11689 --------------------
11690 -- Universal_Data --
11691 --------------------
11693 -- pragma Universal_Data [(library_unit_NAME)];
11695 when Pragma_Universal_Data =>
11698 -- If this is a configuration pragma, then set the universal
11699 -- addressing option, otherwise confirm that the pragma satisfies
11700 -- the requirements of library unit pragma placement and leave it
11701 -- to the GNAAMP back end to detect the pragma (avoids transitive
11702 -- setting of the option due to withed units).
11704 if Is_Configuration_Pragma then
11705 Universal_Addressing_On_AAMP := True;
11707 Check_Valid_Library_Unit_Pragma;
11710 if not AAMP_On_Target then
11711 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
11718 -- pragma Unmodified (local_Name {, local_Name});
11720 when Pragma_Unmodified => Unmodified : declare
11721 Arg_Node : Node_Id;
11722 Arg_Expr : Node_Id;
11723 Arg_Ent : Entity_Id;
11727 Check_At_Least_N_Arguments (1);
11729 -- Loop through arguments
11732 while Present (Arg_Node) loop
11733 Check_No_Identifier (Arg_Node);
11735 -- Note: the analyze call done by Check_Arg_Is_Local_Name will
11736 -- in fact generate reference, so that the entity will have a
11737 -- reference, which will inhibit any warnings about it not
11738 -- being referenced, and also properly show up in the ali file
11739 -- as a reference. But this reference is recorded before the
11740 -- Has_Pragma_Unreferenced flag is set, so that no warning is
11741 -- generated for this reference.
11743 Check_Arg_Is_Local_Name (Arg_Node);
11744 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11746 if Is_Entity_Name (Arg_Expr) then
11747 Arg_Ent := Entity (Arg_Expr);
11749 if not Is_Assignable (Arg_Ent) then
11751 ("pragma% can only be applied to a variable",
11754 Set_Has_Pragma_Unmodified (Arg_Ent);
11766 -- pragma Unreferenced (local_Name {, local_Name});
11768 -- or when used in a context clause:
11770 -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
11772 when Pragma_Unreferenced => Unreferenced : declare
11773 Arg_Node : Node_Id;
11774 Arg_Expr : Node_Id;
11775 Arg_Ent : Entity_Id;
11780 Check_At_Least_N_Arguments (1);
11782 -- Check case of appearing within context clause
11784 if Is_In_Context_Clause then
11786 -- The arguments must all be units mentioned in a with clause
11787 -- in the same context clause. Note we already checked (in
11788 -- Par.Prag) that the arguments are either identifiers or
11789 -- selected components.
11792 while Present (Arg_Node) loop
11793 Citem := First (List_Containing (N));
11794 while Citem /= N loop
11795 if Nkind (Citem) = N_With_Clause
11796 and then Same_Name (Name (Citem), Expression (Arg_Node))
11798 Set_Has_Pragma_Unreferenced
11801 (Library_Unit (Citem))));
11802 Set_Unit_Name (Expression (Arg_Node), Name (Citem));
11811 ("argument of pragma% is not with'ed unit", Arg_Node);
11817 -- Case of not in list of context items
11821 while Present (Arg_Node) loop
11822 Check_No_Identifier (Arg_Node);
11824 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11825 -- will in fact generate reference, so that the entity will
11826 -- have a reference, which will inhibit any warnings about
11827 -- it not being referenced, and also properly show up in the
11828 -- ali file as a reference. But this reference is recorded
11829 -- before the Has_Pragma_Unreferenced flag is set, so that
11830 -- no warning is generated for this reference.
11832 Check_Arg_Is_Local_Name (Arg_Node);
11833 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11835 if Is_Entity_Name (Arg_Expr) then
11836 Arg_Ent := Entity (Arg_Expr);
11838 -- If the entity is overloaded, the pragma applies to the
11839 -- most recent overloading, as documented. In this case,
11840 -- name resolution does not generate a reference, so it
11841 -- must be done here explicitly.
11843 if Is_Overloaded (Arg_Expr) then
11844 Generate_Reference (Arg_Ent, N);
11847 Set_Has_Pragma_Unreferenced (Arg_Ent);
11855 --------------------------
11856 -- Unreferenced_Objects --
11857 --------------------------
11859 -- pragma Unreferenced_Objects (local_Name {, local_Name});
11861 when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare
11862 Arg_Node : Node_Id;
11863 Arg_Expr : Node_Id;
11867 Check_At_Least_N_Arguments (1);
11870 while Present (Arg_Node) loop
11871 Check_No_Identifier (Arg_Node);
11872 Check_Arg_Is_Local_Name (Arg_Node);
11873 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11875 if not Is_Entity_Name (Arg_Expr)
11876 or else not Is_Type (Entity (Arg_Expr))
11879 ("argument for pragma% must be type or subtype", Arg_Node);
11882 Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr));
11885 end Unreferenced_Objects;
11887 ------------------------------
11888 -- Unreserve_All_Interrupts --
11889 ------------------------------
11891 -- pragma Unreserve_All_Interrupts;
11893 when Pragma_Unreserve_All_Interrupts =>
11895 Check_Arg_Count (0);
11897 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
11898 Unreserve_All_Interrupts := True;
11905 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
11907 when Pragma_Unsuppress =>
11909 Process_Suppress_Unsuppress (False);
11911 -------------------
11912 -- Use_VADS_Size --
11913 -------------------
11915 -- pragma Use_VADS_Size;
11917 when Pragma_Use_VADS_Size =>
11919 Check_Arg_Count (0);
11920 Check_Valid_Configuration_Pragma;
11921 Use_VADS_Size := True;
11923 ---------------------
11924 -- Validity_Checks --
11925 ---------------------
11927 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
11929 when Pragma_Validity_Checks => Validity_Checks : declare
11930 A : constant Node_Id := Expression (Arg1);
11936 Check_Arg_Count (1);
11937 Check_No_Identifiers;
11939 if Nkind (A) = N_String_Literal then
11943 Slen : constant Natural := Natural (String_Length (S));
11944 Options : String (1 .. Slen);
11950 C := Get_String_Char (S, Int (J));
11951 exit when not In_Character_Range (C);
11952 Options (J) := Get_Character (C);
11955 Set_Validity_Check_Options (Options);
11963 elsif Nkind (A) = N_Identifier then
11965 if Chars (A) = Name_All_Checks then
11966 Set_Validity_Check_Options ("a");
11968 elsif Chars (A) = Name_On then
11969 Validity_Checks_On := True;
11971 elsif Chars (A) = Name_Off then
11972 Validity_Checks_On := False;
11976 end Validity_Checks;
11982 -- pragma Volatile (LOCAL_NAME);
11984 when Pragma_Volatile =>
11985 Process_Atomic_Shared_Volatile;
11987 -------------------------
11988 -- Volatile_Components --
11989 -------------------------
11991 -- pragma Volatile_Components (array_LOCAL_NAME);
11993 -- Volatile is handled by the same circuit as Atomic_Components
11999 -- pragma Warnings (On | Off);
12000 -- pragma Warnings (On | Off, LOCAL_NAME);
12001 -- pragma Warnings (static_string_EXPRESSION);
12002 -- pragma Warnings (On | Off, STRING_LITERAL);
12004 when Pragma_Warnings => Warnings : begin
12006 Check_At_Least_N_Arguments (1);
12007 Check_No_Identifiers;
12010 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
12013 -- One argument case
12015 if Arg_Count = 1 then
12017 -- On/Off one argument case was processed by parser
12019 if Nkind (Argx) = N_Identifier
12021 (Chars (Argx) = Name_On
12023 Chars (Argx) = Name_Off)
12027 -- One argument case must be ON/OFF or static string expr
12029 elsif not Is_Static_String_Expression (Arg1) then
12031 ("argument of pragma% must be On/Off or " &
12032 "static string expression", Arg2);
12034 -- One argument string expression case
12038 Lit : constant Node_Id := Expr_Value_S (Argx);
12039 Str : constant String_Id := Strval (Lit);
12040 Len : constant Nat := String_Length (Str);
12048 while J <= Len loop
12049 C := Get_String_Char (Str, J);
12050 OK := In_Character_Range (C);
12053 Chr := Get_Character (C);
12057 if J < Len and then Chr = '.' then
12059 C := Get_String_Char (Str, J);
12060 Chr := Get_Character (C);
12062 if not Set_Dot_Warning_Switch (Chr) then
12064 ("invalid warning switch character " &
12071 OK := Set_Warning_Switch (Chr);
12077 ("invalid warning switch character " & Chr,
12086 -- Two or more arguments (must be two)
12089 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
12090 Check_At_Most_N_Arguments (2);
12098 E_Id := Expression (Arg2);
12101 -- In the expansion of an inlined body, a reference to
12102 -- the formal may be wrapped in a conversion if the
12103 -- actual is a conversion. Retrieve the real entity name.
12105 if (In_Instance_Body
12106 or else In_Inlined_Body)
12107 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
12109 E_Id := Expression (E_Id);
12112 -- Entity name case
12114 if Is_Entity_Name (E_Id) then
12115 E := Entity (E_Id);
12122 (E, (Chars (Expression (Arg1)) = Name_Off));
12124 if Chars (Expression (Arg1)) = Name_Off
12125 and then Warn_On_Warnings_Off
12127 Warnings_Off_Pragmas.Append ((N, E));
12130 if Is_Enumeration_Type (E) then
12134 Lit := First_Literal (E);
12135 while Present (Lit) loop
12136 Set_Warnings_Off (Lit);
12137 Next_Literal (Lit);
12142 exit when No (Homonym (E));
12147 -- Error if not entity or static string literal case
12149 elsif not Is_Static_String_Expression (Arg2) then
12151 ("second argument of pragma% must be entity " &
12152 "name or static string expression", Arg2);
12154 -- String literal case
12157 String_To_Name_Buffer
12158 (Strval (Expr_Value_S (Expression (Arg2))));
12160 -- Note on configuration pragma case: If this is a
12161 -- configuration pragma, then for an OFF pragma, we
12162 -- just set Config True in the call, which is all
12163 -- that needs to be done. For the case of ON, this
12164 -- is normally an error, unless it is canceling the
12165 -- effect of a previous OFF pragma in the same file.
12166 -- In any other case, an error will be signalled (ON
12167 -- with no matching OFF).
12169 if Chars (Argx) = Name_Off then
12170 Set_Specific_Warning_Off
12171 (Loc, Name_Buffer (1 .. Name_Len),
12172 Config => Is_Configuration_Pragma);
12174 elsif Chars (Argx) = Name_On then
12175 Set_Specific_Warning_On
12176 (Loc, Name_Buffer (1 .. Name_Len), Err);
12180 ("?pragma Warnings On with no " &
12181 "matching Warnings Off",
12191 -------------------
12192 -- Weak_External --
12193 -------------------
12195 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
12197 when Pragma_Weak_External => Weak_External : declare
12202 Check_Arg_Count (1);
12203 Check_Optional_Identifier (Arg1, Name_Entity);
12204 Check_Arg_Is_Library_Level_Local_Name (Arg1);
12205 Ent := Entity (Expression (Arg1));
12207 if Rep_Item_Too_Early (Ent, N) then
12210 Ent := Underlying_Type (Ent);
12213 -- The only processing required is to link this item on to the
12214 -- list of rep items for the given entity. This is accomplished
12215 -- by the call to Rep_Item_Too_Late (when no error is detected
12216 -- and False is returned).
12218 if Rep_Item_Too_Late (Ent, N) then
12221 Set_Has_Gigi_Rep_Item (Ent);
12225 -----------------------------
12226 -- Wide_Character_Encoding --
12227 -----------------------------
12229 -- pragma Wide_Character_Encoding (IDENTIFIER);
12231 when Pragma_Wide_Character_Encoding =>
12234 -- Nothing to do, handled in parser. Note that we do not enforce
12235 -- configuration pragma placement, this pragma can appear at any
12236 -- place in the source, allowing mixed encodings within a single
12241 --------------------
12242 -- Unknown_Pragma --
12243 --------------------
12245 -- Should be impossible, since the case of an unknown pragma is
12246 -- separately processed before the case statement is entered.
12248 when Unknown_Pragma =>
12249 raise Program_Error;
12253 when Pragma_Exit => null;
12254 end Analyze_Pragma;
12256 -------------------
12257 -- Check_Enabled --
12258 -------------------
12260 function Check_Enabled (Nam : Name_Id) return Boolean is
12264 PP := Opt.Check_Policy_List;
12267 return Assertions_Enabled;
12270 Nam = Chars (Expression (First (Pragma_Argument_Associations (PP))))
12273 Chars (Expression (Last (Pragma_Argument_Associations (PP))))
12275 when Name_On | Name_Check =>
12277 when Name_Off | Name_Ignore =>
12280 raise Program_Error;
12284 PP := Next_Pragma (PP);
12289 ---------------------------------
12290 -- Delay_Config_Pragma_Analyze --
12291 ---------------------------------
12293 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
12295 return Pragma_Name (N) = Name_Interrupt_State
12297 Pragma_Name (N) = Name_Priority_Specific_Dispatching;
12298 end Delay_Config_Pragma_Analyze;
12300 -------------------------
12301 -- Get_Base_Subprogram --
12302 -------------------------
12304 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
12305 Result : Entity_Id;
12308 -- Follow subprogram renaming chain
12311 while Is_Subprogram (Result)
12313 (Is_Generic_Instance (Result)
12314 or else Nkind (Parent (Declaration_Node (Result))) =
12315 N_Subprogram_Renaming_Declaration)
12316 and then Present (Alias (Result))
12318 Result := Alias (Result);
12322 end Get_Base_Subprogram;
12324 --------------------
12325 -- Get_Pragma_Arg --
12326 --------------------
12328 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
12330 if Nkind (Arg) = N_Pragma_Argument_Association then
12331 return Expression (Arg);
12335 end Get_Pragma_Arg;
12341 procedure Initialize is
12346 -----------------------------
12347 -- Is_Config_Static_String --
12348 -----------------------------
12350 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
12352 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
12353 -- This is an internal recursive function that is just like the outer
12354 -- function except that it adds the string to the name buffer rather
12355 -- than placing the string in the name buffer.
12357 ------------------------------
12358 -- Add_Config_Static_String --
12359 ------------------------------
12361 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
12368 if Nkind (N) = N_Op_Concat then
12369 if Add_Config_Static_String (Left_Opnd (N)) then
12370 N := Right_Opnd (N);
12376 if Nkind (N) /= N_String_Literal then
12377 Error_Msg_N ("string literal expected for pragma argument", N);
12381 for J in 1 .. String_Length (Strval (N)) loop
12382 C := Get_String_Char (Strval (N), J);
12384 if not In_Character_Range (C) then
12386 ("string literal contains invalid wide character",
12387 Sloc (N) + 1 + Source_Ptr (J));
12391 Add_Char_To_Name_Buffer (Get_Character (C));
12396 end Add_Config_Static_String;
12398 -- Start of processing for Is_Config_Static_String
12403 return Add_Config_Static_String (Arg);
12404 end Is_Config_Static_String;
12406 -----------------------------------------
12407 -- Is_Non_Significant_Pragma_Reference --
12408 -----------------------------------------
12410 -- This function makes use of the following static table which indicates
12411 -- whether a given pragma is significant. A value of -1 in this table
12412 -- indicates that the reference is significant. A value of zero indicates
12413 -- than appearance as any argument is insignificant, a positive value
12414 -- indicates that appearance in that parameter position is significant.
12416 -- A value of 99 flags a special case requiring a special check (this is
12417 -- used for cases not covered by this standard encoding, e.g. pragma Check
12418 -- where the first argument is not significant, but the others are).
12420 Sig_Flags : constant array (Pragma_Id) of Int :=
12421 (Pragma_AST_Entry => -1,
12422 Pragma_Abort_Defer => -1,
12423 Pragma_Ada_83 => -1,
12424 Pragma_Ada_95 => -1,
12425 Pragma_Ada_05 => -1,
12426 Pragma_Ada_2005 => -1,
12427 Pragma_All_Calls_Remote => -1,
12428 Pragma_Annotate => -1,
12429 Pragma_Assert => -1,
12430 Pragma_Assertion_Policy => 0,
12431 Pragma_Assume_No_Invalid_Values => 0,
12432 Pragma_Asynchronous => -1,
12433 Pragma_Atomic => 0,
12434 Pragma_Atomic_Components => 0,
12435 Pragma_Attach_Handler => -1,
12436 Pragma_Check => 99,
12437 Pragma_Check_Name => 0,
12438 Pragma_Check_Policy => 0,
12439 Pragma_CIL_Constructor => -1,
12440 Pragma_CPP_Class => 0,
12441 Pragma_CPP_Constructor => 0,
12442 Pragma_CPP_Virtual => 0,
12443 Pragma_CPP_Vtable => 0,
12444 Pragma_C_Pass_By_Copy => 0,
12445 Pragma_Comment => 0,
12446 Pragma_Common_Object => -1,
12447 Pragma_Compile_Time_Error => -1,
12448 Pragma_Compile_Time_Warning => -1,
12449 Pragma_Compiler_Unit => 0,
12450 Pragma_Complete_Representation => 0,
12451 Pragma_Complex_Representation => 0,
12452 Pragma_Component_Alignment => -1,
12453 Pragma_Controlled => 0,
12454 Pragma_Convention => 0,
12455 Pragma_Convention_Identifier => 0,
12456 Pragma_Debug => -1,
12457 Pragma_Debug_Policy => 0,
12458 Pragma_Detect_Blocking => -1,
12459 Pragma_Discard_Names => 0,
12460 Pragma_Elaborate => -1,
12461 Pragma_Elaborate_All => -1,
12462 Pragma_Elaborate_Body => -1,
12463 Pragma_Elaboration_Checks => -1,
12464 Pragma_Eliminate => -1,
12465 Pragma_Export => -1,
12466 Pragma_Export_Exception => -1,
12467 Pragma_Export_Function => -1,
12468 Pragma_Export_Object => -1,
12469 Pragma_Export_Procedure => -1,
12470 Pragma_Export_Value => -1,
12471 Pragma_Export_Valued_Procedure => -1,
12472 Pragma_Extend_System => -1,
12473 Pragma_Extensions_Allowed => -1,
12474 Pragma_External => -1,
12475 Pragma_Favor_Top_Level => -1,
12476 Pragma_External_Name_Casing => -1,
12477 Pragma_Fast_Math => -1,
12478 Pragma_Finalize_Storage_Only => 0,
12479 Pragma_Float_Representation => 0,
12480 Pragma_Ident => -1,
12481 Pragma_Implemented_By_Entry => -1,
12482 Pragma_Implicit_Packing => 0,
12483 Pragma_Import => +2,
12484 Pragma_Import_Exception => 0,
12485 Pragma_Import_Function => 0,
12486 Pragma_Import_Object => 0,
12487 Pragma_Import_Procedure => 0,
12488 Pragma_Import_Valued_Procedure => 0,
12489 Pragma_Initialize_Scalars => -1,
12490 Pragma_Inline => 0,
12491 Pragma_Inline_Always => 0,
12492 Pragma_Inline_Generic => 0,
12493 Pragma_Inspection_Point => -1,
12494 Pragma_Interface => +2,
12495 Pragma_Interface_Name => +2,
12496 Pragma_Interrupt_Handler => -1,
12497 Pragma_Interrupt_Priority => -1,
12498 Pragma_Interrupt_State => -1,
12499 Pragma_Java_Constructor => -1,
12500 Pragma_Java_Interface => -1,
12501 Pragma_Keep_Names => 0,
12502 Pragma_License => -1,
12503 Pragma_Link_With => -1,
12504 Pragma_Linker_Alias => -1,
12505 Pragma_Linker_Constructor => -1,
12506 Pragma_Linker_Destructor => -1,
12507 Pragma_Linker_Options => -1,
12508 Pragma_Linker_Section => -1,
12510 Pragma_Locking_Policy => -1,
12511 Pragma_Long_Float => -1,
12512 Pragma_Machine_Attribute => -1,
12514 Pragma_Main_Storage => -1,
12515 Pragma_Memory_Size => -1,
12516 Pragma_No_Return => 0,
12517 Pragma_No_Body => 0,
12518 Pragma_No_Run_Time => -1,
12519 Pragma_No_Strict_Aliasing => -1,
12520 Pragma_Normalize_Scalars => -1,
12521 Pragma_Obsolescent => 0,
12522 Pragma_Optimize => -1,
12523 Pragma_Optimize_Alignment => -1,
12526 Pragma_Passive => -1,
12527 Pragma_Preelaborable_Initialization => -1,
12528 Pragma_Polling => -1,
12529 Pragma_Persistent_BSS => 0,
12530 Pragma_Postcondition => -1,
12531 Pragma_Precondition => -1,
12532 Pragma_Preelaborate => -1,
12533 Pragma_Preelaborate_05 => -1,
12534 Pragma_Priority => -1,
12535 Pragma_Priority_Specific_Dispatching => -1,
12536 Pragma_Profile => 0,
12537 Pragma_Profile_Warnings => 0,
12538 Pragma_Propagate_Exceptions => -1,
12539 Pragma_Psect_Object => -1,
12541 Pragma_Pure_05 => -1,
12542 Pragma_Pure_Function => -1,
12543 Pragma_Queuing_Policy => -1,
12544 Pragma_Ravenscar => -1,
12545 Pragma_Relative_Deadline => -1,
12546 Pragma_Remote_Call_Interface => -1,
12547 Pragma_Remote_Types => -1,
12548 Pragma_Restricted_Run_Time => -1,
12549 Pragma_Restriction_Warnings => -1,
12550 Pragma_Restrictions => -1,
12551 Pragma_Reviewable => -1,
12552 Pragma_Short_Circuit_And_Or => -1,
12553 Pragma_Share_Generic => -1,
12554 Pragma_Shared => -1,
12555 Pragma_Shared_Passive => -1,
12556 Pragma_Source_File_Name => -1,
12557 Pragma_Source_File_Name_Project => -1,
12558 Pragma_Source_Reference => -1,
12559 Pragma_Storage_Size => -1,
12560 Pragma_Storage_Unit => -1,
12561 Pragma_Static_Elaboration_Desired => -1,
12562 Pragma_Stream_Convert => -1,
12563 Pragma_Style_Checks => -1,
12564 Pragma_Subtitle => -1,
12565 Pragma_Suppress => 0,
12566 Pragma_Suppress_Exception_Locations => 0,
12567 Pragma_Suppress_All => -1,
12568 Pragma_Suppress_Debug_Info => 0,
12569 Pragma_Suppress_Initialization => 0,
12570 Pragma_System_Name => -1,
12571 Pragma_Task_Dispatching_Policy => -1,
12572 Pragma_Task_Info => -1,
12573 Pragma_Task_Name => -1,
12574 Pragma_Task_Storage => 0,
12575 Pragma_Thread_Local_Storage => 0,
12576 Pragma_Time_Slice => -1,
12577 Pragma_Title => -1,
12578 Pragma_Unchecked_Union => 0,
12579 Pragma_Unimplemented_Unit => -1,
12580 Pragma_Universal_Aliasing => -1,
12581 Pragma_Universal_Data => -1,
12582 Pragma_Unmodified => -1,
12583 Pragma_Unreferenced => -1,
12584 Pragma_Unreferenced_Objects => -1,
12585 Pragma_Unreserve_All_Interrupts => -1,
12586 Pragma_Unsuppress => 0,
12587 Pragma_Use_VADS_Size => -1,
12588 Pragma_Validity_Checks => -1,
12589 Pragma_Volatile => 0,
12590 Pragma_Volatile_Components => 0,
12591 Pragma_Warnings => -1,
12592 Pragma_Weak_External => -1,
12593 Pragma_Wide_Character_Encoding => 0,
12594 Unknown_Pragma => 0);
12596 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
12605 if Nkind (P) /= N_Pragma_Argument_Association then
12609 Id := Get_Pragma_Id (Parent (P));
12610 C := Sig_Flags (Id);
12622 -- For pragma Check, the first argument is not significant,
12623 -- the second and the third (if present) arguments are
12626 when Pragma_Check =>
12628 P = First (Pragma_Argument_Associations (Parent (P)));
12631 raise Program_Error;
12635 A := First (Pragma_Argument_Associations (Parent (P)));
12636 for J in 1 .. C - 1 loop
12644 return A = P; -- is this wrong way round ???
12647 end Is_Non_Significant_Pragma_Reference;
12649 ------------------------------
12650 -- Is_Pragma_String_Literal --
12651 ------------------------------
12653 -- This function returns true if the corresponding pragma argument is a
12654 -- static string expression. These are the only cases in which string
12655 -- literals can appear as pragma arguments. We also allow a string literal
12656 -- as the first argument to pragma Assert (although it will of course
12657 -- always generate a type error).
12659 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
12660 Pragn : constant Node_Id := Parent (Par);
12661 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
12662 Pname : constant Name_Id := Pragma_Name (Pragn);
12668 N := First (Assoc);
12675 if Pname = Name_Assert then
12678 elsif Pname = Name_Export then
12681 elsif Pname = Name_Ident then
12684 elsif Pname = Name_Import then
12687 elsif Pname = Name_Interface_Name then
12690 elsif Pname = Name_Linker_Alias then
12693 elsif Pname = Name_Linker_Section then
12696 elsif Pname = Name_Machine_Attribute then
12699 elsif Pname = Name_Source_File_Name then
12702 elsif Pname = Name_Source_Reference then
12705 elsif Pname = Name_Title then
12708 elsif Pname = Name_Subtitle then
12714 end Is_Pragma_String_Literal;
12716 --------------------------------------
12717 -- Process_Compilation_Unit_Pragmas --
12718 --------------------------------------
12720 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
12722 -- A special check for pragma Suppress_All, a very strange DEC pragma,
12723 -- strange because it comes at the end of the unit. If we have a pragma
12724 -- Suppress_All in the Pragmas_After of the current unit, then we insert
12725 -- a pragma Suppress (All_Checks) at the start of the context clause to
12726 -- ensure the correct processing.
12729 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
12733 if Present (PA) then
12735 while Present (P) loop
12736 if Pragma_Name (P) = Name_Suppress_All then
12737 Prepend_To (Context_Items (N),
12738 Make_Pragma (Sloc (P),
12739 Chars => Name_Suppress,
12740 Pragma_Argument_Associations => New_List (
12741 Make_Pragma_Argument_Association (Sloc (P),
12743 Make_Identifier (Sloc (P),
12744 Chars => Name_All_Checks)))));
12752 end Process_Compilation_Unit_Pragmas;
12763 --------------------------------
12764 -- Set_Encoded_Interface_Name --
12765 --------------------------------
12767 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
12768 Str : constant String_Id := Strval (S);
12769 Len : constant Int := String_Length (Str);
12774 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
12777 -- Stores encoded value of character code CC. The encoding we use an
12778 -- underscore followed by four lower case hex digits.
12784 procedure Encode is
12786 Store_String_Char (Get_Char_Code ('_'));
12788 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
12790 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
12792 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
12794 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
12797 -- Start of processing for Set_Encoded_Interface_Name
12800 -- If first character is asterisk, this is a link name, and we leave it
12801 -- completely unmodified. We also ignore null strings (the latter case
12802 -- happens only in error cases) and no encoding should occur for Java or
12803 -- AAMP interface names.
12806 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
12807 or else VM_Target /= No_VM
12808 or else AAMP_On_Target
12810 Set_Interface_Name (E, S);
12815 CC := Get_String_Char (Str, J);
12817 exit when not In_Character_Range (CC);
12819 C := Get_Character (CC);
12821 exit when C /= '_' and then C /= '$'
12822 and then C not in '0' .. '9'
12823 and then C not in 'a' .. 'z'
12824 and then C not in 'A' .. 'Z';
12827 Set_Interface_Name (E, S);
12835 -- Here we need to encode. The encoding we use as follows:
12836 -- three underscores + four hex digits (lower case)
12840 for J in 1 .. String_Length (Str) loop
12841 CC := Get_String_Char (Str, J);
12843 if not In_Character_Range (CC) then
12846 C := Get_Character (CC);
12848 if C = '_' or else C = '$'
12849 or else C in '0' .. '9'
12850 or else C in 'a' .. 'z'
12851 or else C in 'A' .. 'Z'
12853 Store_String_Char (CC);
12860 Set_Interface_Name (E,
12861 Make_String_Literal (Sloc (S),
12862 Strval => End_String));
12864 end Set_Encoded_Interface_Name;
12866 -------------------
12867 -- Set_Unit_Name --
12868 -------------------
12870 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
12875 if Nkind (N) = N_Identifier
12876 and then Nkind (With_Item) = N_Identifier
12878 Set_Entity (N, Entity (With_Item));
12880 elsif Nkind (N) = N_Selected_Component then
12881 Change_Selected_Component_To_Expanded_Name (N);
12882 Set_Entity (N, Entity (With_Item));
12883 Set_Entity (Selector_Name (N), Entity (N));
12885 Pref := Prefix (N);
12886 Scop := Scope (Entity (N));
12887 while Nkind (Pref) = N_Selected_Component loop
12888 Change_Selected_Component_To_Expanded_Name (Pref);
12889 Set_Entity (Selector_Name (Pref), Scop);
12890 Set_Entity (Pref, Scop);
12891 Pref := Prefix (Pref);
12892 Scop := Scope (Scop);
12895 Set_Entity (Pref, Scop);