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 Errout; use Errout;
39 with Exp_Dist; use Exp_Dist;
41 with Lib.Writ; use Lib.Writ;
42 with Lib.Xref; use Lib.Xref;
43 with Namet.Sp; use Namet.Sp;
44 with Nlists; use Nlists;
45 with Nmake; use Nmake;
47 with Output; use Output;
48 with Restrict; use Restrict;
49 with Rident; use Rident;
50 with Rtsfind; use Rtsfind;
52 with Sem_Aux; use Sem_Aux;
53 with Sem_Ch3; use Sem_Ch3;
54 with Sem_Ch6; use Sem_Ch6;
55 with Sem_Ch8; use Sem_Ch8;
56 with Sem_Ch12; use Sem_Ch12;
57 with Sem_Ch13; use Sem_Ch13;
58 with Sem_Dist; use Sem_Dist;
59 with Sem_Elim; use Sem_Elim;
60 with Sem_Eval; use Sem_Eval;
61 with Sem_Intr; use Sem_Intr;
62 with Sem_Mech; use Sem_Mech;
63 with Sem_Res; use Sem_Res;
64 with Sem_Type; use Sem_Type;
65 with Sem_Util; use Sem_Util;
66 with Sem_VFpt; use Sem_VFpt;
67 with Sem_Warn; use Sem_Warn;
68 with Stand; use Stand;
69 with Sinfo; use Sinfo;
70 with Sinfo.CN; use Sinfo.CN;
71 with Sinput; use Sinput;
72 with Snames; use Snames;
73 with Stringt; use Stringt;
74 with Stylesw; use Stylesw;
76 with Targparm; use Targparm;
77 with Tbuild; use Tbuild;
79 with Uintp; use Uintp;
80 with Uname; use Uname;
81 with Urealp; use Urealp;
82 with Validsw; use Validsw;
84 package body Sem_Prag is
86 ----------------------------------------------
87 -- Common Handling of Import-Export Pragmas --
88 ----------------------------------------------
90 -- In the following section, a number of Import_xxx and Export_xxx
91 -- pragmas are defined by GNAT. These are compatible with the DEC
92 -- pragmas of the same name, and all have the following common
93 -- form and processing:
96 -- [Internal =>] LOCAL_NAME
97 -- [, [External =>] EXTERNAL_SYMBOL]
98 -- [, other optional parameters ]);
101 -- [Internal =>] LOCAL_NAME
102 -- [, [External =>] EXTERNAL_SYMBOL]
103 -- [, other optional parameters ]);
105 -- EXTERNAL_SYMBOL ::=
107 -- | static_string_EXPRESSION
109 -- The internal LOCAL_NAME designates the entity that is imported or
110 -- exported, and must refer to an entity in the current declarative
111 -- part (as required by the rules for LOCAL_NAME).
113 -- The external linker name is designated by the External parameter
114 -- if given, or the Internal parameter if not (if there is no External
115 -- parameter, the External parameter is a copy of the Internal name).
117 -- If the External parameter is given as a string, then this string
118 -- is treated as an external name (exactly as though it had been given
119 -- as an External_Name parameter for a normal Import pragma).
121 -- If the External parameter is given as an identifier (or there is no
122 -- External parameter, so that the Internal identifier is used), then
123 -- the external name is the characters of the identifier, translated
124 -- to all upper case letters for OpenVMS versions of GNAT, and to all
125 -- lower case letters for all other versions
127 -- Note: the external name specified or implied by any of these special
128 -- Import_xxx or Export_xxx pragmas override an external or link name
129 -- specified in a previous Import or Export pragma.
131 -- Note: these and all other DEC-compatible GNAT pragmas allow full
132 -- use of named notation, following the standard rules for subprogram
133 -- calls, i.e. parameters can be given in any order if named notation
134 -- is used, and positional and named notation can be mixed, subject to
135 -- the rule that all positional parameters must appear first.
137 -- Note: All these pragmas are implemented exactly following the DEC
138 -- design and implementation and are intended to be fully compatible
139 -- with the use of these pragmas in the DEC Ada compiler.
141 --------------------------------------------
142 -- Checking for Duplicated External Names --
143 --------------------------------------------
145 -- It is suspicious if two separate Export pragmas use the same external
146 -- name. The following table is used to diagnose this situation so that
147 -- an appropriate warning can be issued.
149 -- The Node_Id stored is for the N_String_Literal node created to
150 -- hold the value of the external name. The Sloc of this node is
151 -- used to cross-reference the location of the duplication.
153 package Externals is new Table.Table (
154 Table_Component_Type => Node_Id,
155 Table_Index_Type => Int,
156 Table_Low_Bound => 0,
157 Table_Initial => 100,
158 Table_Increment => 100,
159 Table_Name => "Name_Externals");
161 -------------------------------------
162 -- Local Subprograms and Variables --
163 -------------------------------------
165 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
166 -- This routine is used for possible casing adjustment of an explicit
167 -- external name supplied as a string literal (the node N), according
168 -- to the casing requirement of Opt.External_Name_Casing. If this is
169 -- set to As_Is, then the string literal is returned unchanged, but if
170 -- it is set to Uppercase or Lowercase, then a new string literal with
171 -- appropriate casing is constructed.
173 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
174 -- If Def_Id refers to a renamed subprogram, then the base subprogram
175 -- (the original one, following the renaming chain) is returned.
176 -- Otherwise the entity is returned unchanged. Should be in Einfo???
178 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
179 -- All the routines that check pragma arguments take either a pragma
180 -- argument association (in which case the expression of the argument
181 -- association is checked), or the expression directly. The function
182 -- Get_Pragma_Arg is a utility used to deal with these two cases. If Arg
183 -- is a pragma argument association node, then its expression is returned,
184 -- otherwise Arg is returned unchanged.
187 -- This is a dummy function called by the processing for pragma Reviewable.
188 -- It is there for assisting front end debugging. By placing a Reviewable
189 -- pragma in the source program, a breakpoint on rv catches this place in
190 -- the source, allowing convenient stepping to the point of interest.
192 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
193 -- Place semantic information on the argument of an Elaborate or
194 -- Elaborate_All pragma. Entity name for unit and its parents is
195 -- taken from item in previous with_clause that mentions the unit.
197 -------------------------------
198 -- Adjust_External_Name_Case --
199 -------------------------------
201 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
205 -- Adjust case of literal if required
207 if Opt.External_Name_Exp_Casing = As_Is then
211 -- Copy existing string
217 for J in 1 .. String_Length (Strval (N)) loop
218 CC := Get_String_Char (Strval (N), J);
220 if Opt.External_Name_Exp_Casing = Uppercase
221 and then CC >= Get_Char_Code ('a')
222 and then CC <= Get_Char_Code ('z')
224 Store_String_Char (CC - 32);
226 elsif Opt.External_Name_Exp_Casing = Lowercase
227 and then CC >= Get_Char_Code ('A')
228 and then CC <= Get_Char_Code ('Z')
230 Store_String_Char (CC + 32);
233 Store_String_Char (CC);
238 Make_String_Literal (Sloc (N),
239 Strval => End_String);
241 end Adjust_External_Name_Case;
243 ------------------------------
244 -- Analyze_PPC_In_Decl_Part --
245 ------------------------------
247 procedure Analyze_PPC_In_Decl_Part (N : Node_Id; S : Entity_Id) is
248 Arg1 : constant Node_Id :=
249 First (Pragma_Argument_Associations (N));
250 Arg2 : constant Node_Id := Next (Arg1);
253 -- Install formals and push subprogram spec onto scope stack
254 -- so that we can see the formals from the pragma.
259 -- Preanalyze the boolean expression, we treat this as a
260 -- spec expression (i.e. similar to a default expression).
262 Preanalyze_Spec_Expression
263 (Get_Pragma_Arg (Arg1), Standard_Boolean);
265 -- If there is a message argument, analyze it the same way
267 if Present (Arg2) then
268 Preanalyze_Spec_Expression
269 (Get_Pragma_Arg (Arg2), Standard_String);
272 -- Remove the subprogram from the scope stack now that the
273 -- pre-analysis of the precondition/postcondition is done.
276 end Analyze_PPC_In_Decl_Part;
282 procedure Analyze_Pragma (N : Node_Id) is
283 Loc : constant Source_Ptr := Sloc (N);
284 Pname : constant Name_Id := Pragma_Name (N);
287 Pragma_Exit : exception;
288 -- This exception is used to exit pragma processing completely. It
289 -- is used when an error is detected, and no further processing is
290 -- required. It is also used if an earlier error has left the tree
291 -- in a state where the pragma should not be processed.
294 -- Number of pragma argument associations
300 -- First four pragma arguments (pragma argument association nodes,
301 -- or Empty if the corresponding argument does not exist).
303 type Name_List is array (Natural range <>) of Name_Id;
304 type Args_List is array (Natural range <>) of Node_Id;
305 -- Types used for arguments to Check_Arg_Order and Gather_Associations
307 procedure Ada_2005_Pragma;
308 -- Called for pragmas defined in Ada 2005, that are not in Ada 95. In
309 -- Ada 95 mode, these are implementation defined pragmas, so should be
310 -- caught by the No_Implementation_Pragmas restriction
312 procedure Check_Ada_83_Warning;
313 -- Issues a warning message for the current pragma if operating in Ada
314 -- 83 mode (used for language pragmas that are not a standard part of
315 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
318 procedure Check_Arg_Count (Required : Nat);
319 -- Check argument count for pragma is equal to given parameter.
320 -- If not, then issue an error message and raise Pragma_Exit.
322 -- Note: all routines whose name is Check_Arg_Is_xxx take an
323 -- argument Arg which can either be a pragma argument association,
324 -- in which case the check is applied to the expression of the
325 -- association or an expression directly.
327 procedure Check_Arg_Is_External_Name (Arg : Node_Id);
328 -- Check that an argument has the right form for an EXTERNAL_NAME
329 -- parameter of an extended import/export pragma. The rule is that
330 -- the name must be an identifier or string literal (in Ada 83 mode)
331 -- or a static string expression (in Ada 95 mode).
333 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
334 -- Check the specified argument Arg to make sure that it is an
335 -- identifier. If not give error and raise Pragma_Exit.
337 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
338 -- Check the specified argument Arg to make sure that it is an
339 -- integer literal. If not give error and raise Pragma_Exit.
341 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
342 -- Check the specified argument Arg to make sure that it has the
343 -- proper syntactic form for a local name and meets the semantic
344 -- requirements for a local name. The local name is analyzed as
345 -- part of the processing for this call. In addition, the local
346 -- name is required to represent an entity at the library level.
348 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
349 -- Check the specified argument Arg to make sure that it has the
350 -- proper syntactic form for a local name and meets the semantic
351 -- requirements for a local name. The local name is analyzed as
352 -- part of the processing for this call.
354 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
355 -- Check the specified argument Arg to make sure that it is a valid
356 -- locking policy name. If not give error and raise Pragma_Exit.
358 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
359 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
360 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3, N4 : Name_Id);
361 -- Check the specified argument Arg to make sure that it is an
362 -- identifier whose name matches either N1 or N2 (or N3 if present).
363 -- If not then give error and raise Pragma_Exit.
365 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
366 -- Check the specified argument Arg to make sure that it is a valid
367 -- queuing policy name. If not give error and raise Pragma_Exit.
369 procedure Check_Arg_Is_Static_Expression
372 -- Check the specified argument Arg to make sure that it is a static
373 -- expression of the given type (i.e. it will be analyzed and resolved
374 -- using this type, which can be any valid argument to Resolve, e.g.
375 -- Any_Integer is OK). If not, given error and raise Pragma_Exit.
377 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
378 -- Check the specified argument Arg to make sure that it is a
379 -- string literal. If not give error and raise Pragma_Exit
381 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
382 -- Check the specified argument Arg to make sure that it is a valid
383 -- valid task dispatching policy name. If not give error and raise
386 procedure Check_Arg_Order (Names : Name_List);
387 -- Checks for an instance of two arguments with identifiers for the
388 -- current pragma which are not in the sequence indicated by Names,
389 -- and if so, generates a fatal message about bad order of arguments.
391 procedure Check_At_Least_N_Arguments (N : Nat);
392 -- Check there are at least N arguments present
394 procedure Check_At_Most_N_Arguments (N : Nat);
395 -- Check there are no more than N arguments present
397 procedure Check_Component (Comp : Node_Id);
398 -- Examine Unchecked_Union component for correct use of per-object
399 -- constrained subtypes, and for restrictions on finalizable components.
401 procedure Check_Duplicated_Export_Name (Nam : Node_Id);
402 -- Nam is an N_String_Literal node containing the external name set
403 -- by an Import or Export pragma (or extended Import or Export pragma).
404 -- This procedure checks for possible duplications if this is the
405 -- export case, and if found, issues an appropriate error message.
407 procedure Check_First_Subtype (Arg : Node_Id);
408 -- Checks that Arg, whose expression is an entity name referencing
409 -- a subtype, does not reference a type that is not a first subtype.
411 procedure Check_In_Main_Program;
412 -- Common checks for pragmas that appear within a main program
413 -- (Priority, Main_Storage, Time_Slice, Relative_Deadline).
415 procedure Check_Interrupt_Or_Attach_Handler;
416 -- Common processing for first argument of pragma Interrupt_Handler
417 -- or pragma Attach_Handler.
419 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
420 -- Check that pragma appears in a declarative part, or in a package
421 -- specification, i.e. that it does not occur in a statement sequence
424 procedure Check_No_Identifier (Arg : Node_Id);
425 -- Checks that the given argument does not have an identifier. If
426 -- an identifier is present, then an error message is issued, and
427 -- Pragma_Exit is raised.
429 procedure Check_No_Identifiers;
430 -- Checks that none of the arguments to the pragma has an identifier.
431 -- If any argument has an identifier, then an error message is issued,
432 -- and Pragma_Exit is raised.
434 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
435 -- Checks if the given argument has an identifier, and if so, requires
436 -- it to match the given identifier name. If there is a non-matching
437 -- identifier, then an error message is given and Error_Pragmas raised.
439 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
440 -- Checks if the given argument has an identifier, and if so, requires
441 -- it to match the given identifier name. If there is a non-matching
442 -- identifier, then an error message is given and Error_Pragmas raised.
443 -- In this version of the procedure, the identifier name is given as
444 -- a string with lower case letters.
446 procedure Check_Precondition_Postcondition (In_Body : out Boolean);
447 -- Called to process a precondition or postcondition pragma. There are
450 -- The pragma appears after a subprogram spec
452 -- If the corresponding check is not enabled, the pragma is analyzed
453 -- but otherwise ignored and control returns with In_Body set False.
455 -- If the check is enabled, then the first step is to analyze the
456 -- pragma, but this is skipped if the subprogram spec appears within
457 -- a package specification (because this is the case where we delay
458 -- analysis till the end of the spec). Then (whether or not it was
459 -- analyzed), the pragma is chained to the subprogram in question
460 -- (using Spec_PPC_List and Next_Pragma) and control returns to the
461 -- caller with In_Body set False.
463 -- The pragma appears at the start of subprogram body declarations
465 -- In this case an immediate return to the caller is made with
466 -- In_Body set True, and the pragma is NOT analyzed.
468 -- In all other cases, an error message for bad placement is given
470 procedure Check_Static_Constraint (Constr : Node_Id);
471 -- Constr is a constraint from an N_Subtype_Indication node from a
472 -- component constraint in an Unchecked_Union type. This routine checks
473 -- that the constraint is static as required by the restrictions for
476 procedure Check_Valid_Configuration_Pragma;
477 -- Legality checks for placement of a configuration pragma
479 procedure Check_Valid_Library_Unit_Pragma;
480 -- Legality checks for library unit pragmas. A special case arises for
481 -- pragmas in generic instances that come from copies of the original
482 -- library unit pragmas in the generic templates. In the case of other
483 -- than library level instantiations these can appear in contexts which
484 -- would normally be invalid (they only apply to the original template
485 -- and to library level instantiations), and they are simply ignored,
486 -- which is implemented by rewriting them as null statements.
488 procedure Check_Variant (Variant : Node_Id);
489 -- Check Unchecked_Union variant for lack of nested variants and
490 -- presence of at least one component.
492 procedure Error_Pragma (Msg : String);
493 pragma No_Return (Error_Pragma);
494 -- Outputs error message for current pragma. The message contains a %
495 -- that will be replaced with the pragma name, and the flag is placed
496 -- on the pragma itself. Pragma_Exit is then raised.
498 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
499 pragma No_Return (Error_Pragma_Arg);
500 -- Outputs error message for current pragma. The message may contain
501 -- a % that will be replaced with the pragma name. The parameter Arg
502 -- may either be a pragma argument association, in which case the flag
503 -- is placed on the expression of this association, or an expression,
504 -- in which case the flag is placed directly on the expression. The
505 -- message is placed using Error_Msg_N, so the message may also contain
506 -- an & insertion character which will reference the given Arg value.
507 -- After placing the message, Pragma_Exit is raised.
509 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
510 pragma No_Return (Error_Pragma_Arg);
511 -- Similar to above form of Error_Pragma_Arg except that two messages
512 -- are provided, the second is a continuation comment starting with \.
514 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
515 pragma No_Return (Error_Pragma_Arg_Ident);
516 -- Outputs error message for current pragma. The message may contain
517 -- a % that will be replaced with the pragma name. The parameter Arg
518 -- must be a pragma argument association with a non-empty identifier
519 -- (i.e. its Chars field must be set), and the error message is placed
520 -- on the identifier. The message is placed using Error_Msg_N so
521 -- the message may also contain an & insertion character which will
522 -- reference the identifier. After placing the message, Pragma_Exit
525 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id);
526 pragma No_Return (Error_Pragma_Ref);
527 -- Outputs error message for current pragma. The message may contain
528 -- a % that will be replaced with the pragma name. The parameter Ref
529 -- must be an entity whose name can be referenced by & and sloc by #.
530 -- After placing the message, Pragma_Exit is raised.
532 function Find_Lib_Unit_Name return Entity_Id;
533 -- Used for a library unit pragma to find the entity to which the
534 -- library unit pragma applies, returns the entity found.
536 procedure Find_Program_Unit_Name (Id : Node_Id);
537 -- If the pragma is a compilation unit pragma, the id must denote the
538 -- compilation unit in the same compilation, and the pragma must appear
539 -- in the list of preceding or trailing pragmas. If it is a program
540 -- unit pragma that is not a compilation unit pragma, then the
541 -- identifier must be visible.
543 function Find_Unique_Parameterless_Procedure
545 Arg : Node_Id) return Entity_Id;
546 -- Used for a procedure pragma to find the unique parameterless
547 -- procedure identified by Name, returns it if it exists, otherwise
548 -- errors out and uses Arg as the pragma argument for the message.
550 procedure Gather_Associations
552 Args : out Args_List);
553 -- This procedure is used to gather the arguments for a pragma that
554 -- permits arbitrary ordering of parameters using the normal rules
555 -- for named and positional parameters. The Names argument is a list
556 -- of Name_Id values that corresponds to the allowed pragma argument
557 -- association identifiers in order. The result returned in Args is
558 -- a list of corresponding expressions that are the pragma arguments.
559 -- Note that this is a list of expressions, not of pragma argument
560 -- associations (Gather_Associations has completely checked all the
561 -- optional identifiers when it returns). An entry in Args is Empty
562 -- on return if the corresponding argument is not present.
564 procedure GNAT_Pragma;
565 -- Called for all GNAT defined pragmas to check the relevant restriction
566 -- (No_Implementation_Pragmas).
568 function Is_Before_First_Decl
569 (Pragma_Node : Node_Id;
570 Decls : List_Id) return Boolean;
571 -- Return True if Pragma_Node is before the first declarative item in
572 -- Decls where Decls is the list of declarative items.
574 function Is_Configuration_Pragma return Boolean;
575 -- Determines if the placement of the current pragma is appropriate
576 -- for a configuration pragma.
578 function Is_In_Context_Clause return Boolean;
579 -- Returns True if pragma appears within the context clause of a unit,
580 -- and False for any other placement (does not generate any messages).
582 function Is_Static_String_Expression (Arg : Node_Id) return Boolean;
583 -- Analyzes the argument, and determines if it is a static string
584 -- expression, returns True if so, False if non-static or not String.
586 procedure Pragma_Misplaced;
587 pragma No_Return (Pragma_Misplaced);
588 -- Issue fatal error message for misplaced pragma
590 procedure Process_Atomic_Shared_Volatile;
591 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
592 -- Shared is an obsolete Ada 83 pragma, treated as being identical
593 -- in effect to pragma Atomic.
595 procedure Process_Compile_Time_Warning_Or_Error;
596 -- Common processing for Compile_Time_Error and Compile_Time_Warning
598 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
599 -- Common processing for Convention, Interface, Import and Export.
600 -- Checks first two arguments of pragma, and sets the appropriate
601 -- convention value in the specified entity or entities. On return
602 -- C is the convention, E is the referenced entity.
604 procedure Process_Extended_Import_Export_Exception_Pragma
605 (Arg_Internal : Node_Id;
606 Arg_External : Node_Id;
609 -- Common processing for the pragmas Import/Export_Exception.
610 -- The three arguments correspond to the three named parameters of
611 -- the pragma. An argument is empty if the corresponding parameter
612 -- is not present in the pragma.
614 procedure Process_Extended_Import_Export_Object_Pragma
615 (Arg_Internal : Node_Id;
616 Arg_External : Node_Id;
618 -- Common processing for the pragmas Import/Export_Object.
619 -- The three arguments correspond to the three named parameters
620 -- of the pragmas. An argument is empty if the corresponding
621 -- parameter is not present in the pragma.
623 procedure Process_Extended_Import_Export_Internal_Arg
624 (Arg_Internal : Node_Id := Empty);
625 -- Common processing for all extended Import and Export pragmas. The
626 -- argument is the pragma parameter for the Internal argument. If
627 -- Arg_Internal is empty or inappropriate, an error message is posted.
628 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
629 -- set to identify the referenced entity.
631 procedure Process_Extended_Import_Export_Subprogram_Pragma
632 (Arg_Internal : Node_Id;
633 Arg_External : Node_Id;
634 Arg_Parameter_Types : Node_Id;
635 Arg_Result_Type : Node_Id := Empty;
636 Arg_Mechanism : Node_Id;
637 Arg_Result_Mechanism : Node_Id := Empty;
638 Arg_First_Optional_Parameter : Node_Id := Empty);
639 -- Common processing for all extended Import and Export pragmas
640 -- applying to subprograms. The caller omits any arguments that do
641 -- not apply to the pragma in question (for example, Arg_Result_Type
642 -- can be non-Empty only in the Import_Function and Export_Function
643 -- cases). The argument names correspond to the allowed pragma
644 -- 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
655 -- actually 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
665 -- given. Ext_Arg is always present, but Link_Arg may be missing.
666 -- Note that Ext_Arg may represent the Link_Name if Link_Arg is
667 -- missing, and appropriate named notation is used for Ext_Arg.
668 -- If neither Ext_Arg nor Link_Arg is present, the interface name
669 -- is set to the default 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
715 -- make up the Ravenscar Profile. N is the corresponding pragma
716 -- node, which is used for error messages on any constructs
717 -- that violate the profile.
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
973 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
976 Analyze_And_Resolve (Argx, Typ);
978 if Is_OK_Static_Expression (Argx) then
981 elsif Etype (Argx) = Any_Type then
984 -- An interesting special case, if we have a string literal and
985 -- we are in Ada 83 mode, then we allow it even though it will
986 -- not be flagged as static. This allows the use of Ada 95
987 -- pragmas like Import in Ada 83 mode. They will of course be
988 -- flagged with warnings as usual, but will not cause errors.
990 elsif Ada_Version = Ada_83
991 and then Nkind (Argx) = N_String_Literal
995 -- Static expression that raises Constraint_Error. This has
996 -- already been flagged, so just exit from pragma processing.
998 elsif Is_Static_Expression (Argx) then
1001 -- Finally, we have a real error
1004 Error_Msg_Name_1 := Pname;
1005 Flag_Non_Static_Expr
1006 ("argument for pragma% must be a static expression!", Argx);
1009 end Check_Arg_Is_Static_Expression;
1011 ---------------------------------
1012 -- Check_Arg_Is_String_Literal --
1013 ---------------------------------
1015 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
1016 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1018 if Nkind (Argx) /= N_String_Literal then
1020 ("argument for pragma% must be string literal", Argx);
1022 end Check_Arg_Is_String_Literal;
1024 ------------------------------------------
1025 -- Check_Arg_Is_Task_Dispatching_Policy --
1026 ------------------------------------------
1028 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
1029 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1032 Check_Arg_Is_Identifier (Argx);
1034 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
1036 ("& is not a valid task dispatching policy name", Argx);
1038 end Check_Arg_Is_Task_Dispatching_Policy;
1040 ---------------------
1041 -- Check_Arg_Order --
1042 ---------------------
1044 procedure Check_Arg_Order (Names : Name_List) is
1047 Highest_So_Far : Natural := 0;
1048 -- Highest index in Names seen do far
1052 for J in 1 .. Arg_Count loop
1053 if Chars (Arg) /= No_Name then
1054 for K in Names'Range loop
1055 if Chars (Arg) = Names (K) then
1056 if K < Highest_So_Far then
1057 Error_Msg_Name_1 := Pname;
1059 ("parameters out of order for pragma%", Arg);
1060 Error_Msg_Name_1 := Names (K);
1061 Error_Msg_Name_2 := Names (Highest_So_Far);
1062 Error_Msg_N ("\% must appear before %", Arg);
1066 Highest_So_Far := K;
1074 end Check_Arg_Order;
1076 --------------------------------
1077 -- Check_At_Least_N_Arguments --
1078 --------------------------------
1080 procedure Check_At_Least_N_Arguments (N : Nat) is
1082 if Arg_Count < N then
1083 Error_Pragma ("too few arguments for pragma%");
1085 end Check_At_Least_N_Arguments;
1087 -------------------------------
1088 -- Check_At_Most_N_Arguments --
1089 -------------------------------
1091 procedure Check_At_Most_N_Arguments (N : Nat) is
1094 if Arg_Count > N then
1096 for J in 1 .. N loop
1098 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
1101 end Check_At_Most_N_Arguments;
1103 ---------------------
1104 -- Check_Component --
1105 ---------------------
1107 procedure Check_Component (Comp : Node_Id) is
1109 if Nkind (Comp) = N_Component_Declaration then
1111 Sindic : constant Node_Id :=
1112 Subtype_Indication (Component_Definition (Comp));
1113 Typ : constant Entity_Id :=
1114 Etype (Defining_Identifier (Comp));
1116 if Nkind (Sindic) = N_Subtype_Indication then
1118 -- Ada 2005 (AI-216): If a component subtype is subject to
1119 -- a per-object constraint, then the component type shall
1120 -- be an Unchecked_Union.
1122 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
1124 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
1126 Error_Msg_N ("component subtype subject to per-object" &
1127 " constraint must be an Unchecked_Union", Comp);
1131 if Is_Controlled (Typ) then
1133 ("component of unchecked union cannot be controlled", Comp);
1135 elsif Has_Task (Typ) then
1137 ("component of unchecked union cannot have tasks", Comp);
1141 end Check_Component;
1143 ----------------------------------
1144 -- Check_Duplicated_Export_Name --
1145 ----------------------------------
1147 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
1148 String_Val : constant String_Id := Strval (Nam);
1151 -- We are only interested in the export case, and in the case of
1152 -- generics, it is the instance, not the template, that is the
1153 -- problem (the template will generate a warning in any case).
1155 if not Inside_A_Generic
1156 and then (Prag_Id = Pragma_Export
1158 Prag_Id = Pragma_Export_Procedure
1160 Prag_Id = Pragma_Export_Valued_Procedure
1162 Prag_Id = Pragma_Export_Function)
1164 for J in Externals.First .. Externals.Last loop
1165 if String_Equal (String_Val, Strval (Externals.Table (J))) then
1166 Error_Msg_Sloc := Sloc (Externals.Table (J));
1167 Error_Msg_N ("external name duplicates name given#", Nam);
1172 Externals.Append (Nam);
1174 end Check_Duplicated_Export_Name;
1176 -------------------------
1177 -- Check_First_Subtype --
1178 -------------------------
1180 procedure Check_First_Subtype (Arg : Node_Id) is
1181 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1183 if not Is_First_Subtype (Entity (Argx)) then
1185 ("pragma% cannot apply to subtype", Argx);
1187 end Check_First_Subtype;
1189 ---------------------------
1190 -- Check_In_Main_Program --
1191 ---------------------------
1193 procedure Check_In_Main_Program is
1194 P : constant Node_Id := Parent (N);
1197 -- Must be at in subprogram body
1199 if Nkind (P) /= N_Subprogram_Body then
1200 Error_Pragma ("% pragma allowed only in subprogram");
1202 -- Otherwise warn if obviously not main program
1204 elsif Present (Parameter_Specifications (Specification (P)))
1205 or else not Is_Compilation_Unit (Defining_Entity (P))
1207 Error_Msg_Name_1 := Pname;
1209 ("?pragma% is only effective in main program", N);
1211 end Check_In_Main_Program;
1213 ---------------------------------------
1214 -- Check_Interrupt_Or_Attach_Handler --
1215 ---------------------------------------
1217 procedure Check_Interrupt_Or_Attach_Handler is
1218 Arg1_X : constant Node_Id := Expression (Arg1);
1219 Handler_Proc, Proc_Scope : Entity_Id;
1224 if Prag_Id = Pragma_Interrupt_Handler then
1225 Check_Restriction (No_Dynamic_Attachment, N);
1228 Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
1229 Proc_Scope := Scope (Handler_Proc);
1231 -- On AAMP only, a pragma Interrupt_Handler is supported for
1232 -- nonprotected parameterless procedures.
1234 if not AAMP_On_Target
1235 or else Prag_Id = Pragma_Attach_Handler
1237 if Ekind (Proc_Scope) /= E_Protected_Type then
1239 ("argument of pragma% must be protected procedure", Arg1);
1242 if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
1243 Error_Pragma ("pragma% must be in protected definition");
1247 if not Is_Library_Level_Entity (Proc_Scope)
1248 or else (AAMP_On_Target
1249 and then not Is_Library_Level_Entity (Handler_Proc))
1252 ("argument for pragma% must be library level entity", Arg1);
1254 end Check_Interrupt_Or_Attach_Handler;
1256 -------------------------------------------
1257 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1258 -------------------------------------------
1260 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1269 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1272 elsif Nkind_In (P, N_Package_Specification,
1277 -- Note: the following tests seem a little peculiar, because
1278 -- they test for bodies, but if we were in the statement part
1279 -- of the body, we would already have hit the handled statement
1280 -- sequence, so the only way we get here is by being in the
1281 -- declarative part of the body.
1283 elsif Nkind_In (P, N_Subprogram_Body,
1294 Error_Pragma ("pragma% is not in declarative part or package spec");
1295 end Check_Is_In_Decl_Part_Or_Package_Spec;
1297 -------------------------
1298 -- Check_No_Identifier --
1299 -------------------------
1301 procedure Check_No_Identifier (Arg : Node_Id) is
1303 if Chars (Arg) /= No_Name then
1304 Error_Pragma_Arg_Ident
1305 ("pragma% does not permit identifier& here", Arg);
1307 end Check_No_Identifier;
1309 --------------------------
1310 -- Check_No_Identifiers --
1311 --------------------------
1313 procedure Check_No_Identifiers is
1316 if Arg_Count > 0 then
1318 while Present (Arg_Node) loop
1319 Check_No_Identifier (Arg_Node);
1323 end Check_No_Identifiers;
1325 -------------------------------
1326 -- Check_Optional_Identifier --
1327 -------------------------------
1329 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1331 if Present (Arg) and then Chars (Arg) /= No_Name then
1332 if Chars (Arg) /= Id then
1333 Error_Msg_Name_1 := Pname;
1334 Error_Msg_Name_2 := Id;
1335 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1339 end Check_Optional_Identifier;
1341 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1343 Name_Buffer (1 .. Id'Length) := Id;
1344 Name_Len := Id'Length;
1345 Check_Optional_Identifier (Arg, Name_Find);
1346 end Check_Optional_Identifier;
1348 --------------------------------------
1349 -- Check_Precondition_Postcondition --
1350 --------------------------------------
1352 procedure Check_Precondition_Postcondition (In_Body : out Boolean) is
1356 procedure Chain_PPC (PO : Node_Id);
1357 -- If PO is a subprogram declaration node (or a generic subprogram
1358 -- declaration node), then the precondition/postcondition applies
1359 -- to this subprogram and the processing for the pragma is completed.
1360 -- Otherwise the pragma is misplaced.
1366 procedure Chain_PPC (PO : Node_Id) is
1370 if not Nkind_In (PO, N_Subprogram_Declaration,
1371 N_Generic_Subprogram_Declaration)
1376 -- Here if we have subprogram or generic subprogram declaration
1378 S := Defining_Unit_Name (Specification (PO));
1380 -- Analyze the pragma unless it appears within a package spec,
1381 -- which is the case where we delay the analysis of the PPC until
1382 -- the end of the package declarations (for details, see
1383 -- Analyze_Package_Specification.Analyze_PPCs).
1385 if not Is_Package_Or_Generic_Package (Scope (S)) then
1386 Analyze_PPC_In_Decl_Part (N, S);
1389 -- Chain spec PPC pragma to list for subprogram
1391 Set_Next_Pragma (N, Spec_PPC_List (S));
1392 Set_Spec_PPC_List (S, N);
1394 -- Return indicating spec case
1400 -- Start of processing for Check_Precondition_Postcondition
1403 if not Is_List_Member (N) then
1407 -- Record whether pragma is enabled
1409 Set_PPC_Enabled (N, Check_Enabled (Pname));
1411 -- If we are within an inlined body, the legality of the pragma
1412 -- has been checked already.
1414 if In_Inlined_Body then
1419 -- Search prior declarations
1422 while Present (Prev (P)) loop
1425 -- If the previous node is a generic subprogram, do not go to
1426 -- to the original node, which is the unanalyzed tree: we need
1427 -- to attach the pre/postconditions to the analyzed version
1428 -- at this point. They get propagated to the original tree when
1429 -- analyzing the corresponding body.
1431 if Nkind (P) not in N_Generic_Declaration then
1432 PO := Original_Node (P);
1437 -- Skip past prior pragma
1439 if Nkind (PO) = N_Pragma then
1442 -- Skip stuff not coming from source
1444 elsif not Comes_From_Source (PO) then
1447 -- Only remaining possibility is subprogram declaration
1455 -- If we fall through loop, pragma is at start of list, so see if
1456 -- it is at the start of declarations of a subprogram body.
1458 if Nkind (Parent (N)) = N_Subprogram_Body
1459 and then List_Containing (N) = Declarations (Parent (N))
1461 if Operating_Mode /= Generate_Code then
1463 -- Analyze expression in pragma, for correctness
1464 -- and for ASIS use.
1466 Preanalyze_Spec_Expression
1467 (Get_Pragma_Arg (Arg1), Standard_Boolean);
1473 -- See if it is in the pragmas after a library level subprogram
1475 elsif Nkind (Parent (N)) = N_Compilation_Unit_Aux then
1476 Chain_PPC (Unit (Parent (Parent (N))));
1480 -- If we fall through, pragma was misplaced
1483 end Check_Precondition_Postcondition;
1485 -----------------------------
1486 -- Check_Static_Constraint --
1487 -----------------------------
1489 -- Note: for convenience in writing this procedure, in addition to
1490 -- the officially (i.e. by spec) allowed argument which is always
1491 -- a constraint, it also allows ranges and discriminant associations.
1492 -- Above is not clear ???
1494 procedure Check_Static_Constraint (Constr : Node_Id) is
1496 procedure Require_Static (E : Node_Id);
1497 -- Require given expression to be static expression
1499 --------------------
1500 -- Require_Static --
1501 --------------------
1503 procedure Require_Static (E : Node_Id) is
1505 if not Is_OK_Static_Expression (E) then
1506 Flag_Non_Static_Expr
1507 ("non-static constraint not allowed in Unchecked_Union!", E);
1512 -- Start of processing for Check_Static_Constraint
1515 case Nkind (Constr) is
1516 when N_Discriminant_Association =>
1517 Require_Static (Expression (Constr));
1520 Require_Static (Low_Bound (Constr));
1521 Require_Static (High_Bound (Constr));
1523 when N_Attribute_Reference =>
1524 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1525 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1527 when N_Range_Constraint =>
1528 Check_Static_Constraint (Range_Expression (Constr));
1530 when N_Index_Or_Discriminant_Constraint =>
1534 IDC := First (Constraints (Constr));
1535 while Present (IDC) loop
1536 Check_Static_Constraint (IDC);
1544 end Check_Static_Constraint;
1546 --------------------------------------
1547 -- Check_Valid_Configuration_Pragma --
1548 --------------------------------------
1550 -- A configuration pragma must appear in the context clause of a
1551 -- compilation unit, and only other pragmas may precede it. Note that
1552 -- the test also allows use in a configuration pragma file.
1554 procedure Check_Valid_Configuration_Pragma is
1556 if not Is_Configuration_Pragma then
1557 Error_Pragma ("incorrect placement for configuration pragma%");
1559 end Check_Valid_Configuration_Pragma;
1561 -------------------------------------
1562 -- Check_Valid_Library_Unit_Pragma --
1563 -------------------------------------
1565 procedure Check_Valid_Library_Unit_Pragma is
1567 Parent_Node : Node_Id;
1568 Unit_Name : Entity_Id;
1569 Unit_Kind : Node_Kind;
1570 Unit_Node : Node_Id;
1571 Sindex : Source_File_Index;
1574 if not Is_List_Member (N) then
1578 Plist := List_Containing (N);
1579 Parent_Node := Parent (Plist);
1581 if Parent_Node = Empty then
1584 -- Case of pragma appearing after a compilation unit. In this
1585 -- case it must have an argument with the corresponding name
1586 -- and must be part of the following pragmas of its parent.
1588 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1589 if Plist /= Pragmas_After (Parent_Node) then
1592 elsif Arg_Count = 0 then
1594 ("argument required if outside compilation unit");
1597 Check_No_Identifiers;
1598 Check_Arg_Count (1);
1599 Unit_Node := Unit (Parent (Parent_Node));
1600 Unit_Kind := Nkind (Unit_Node);
1602 Analyze (Expression (Arg1));
1604 if Unit_Kind = N_Generic_Subprogram_Declaration
1605 or else Unit_Kind = N_Subprogram_Declaration
1607 Unit_Name := Defining_Entity (Unit_Node);
1609 elsif Unit_Kind in N_Generic_Instantiation then
1610 Unit_Name := Defining_Entity (Unit_Node);
1613 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1616 if Chars (Unit_Name) /=
1617 Chars (Entity (Expression (Arg1)))
1620 ("pragma% argument is not current unit name", Arg1);
1623 if Ekind (Unit_Name) = E_Package
1624 and then Present (Renamed_Entity (Unit_Name))
1626 Error_Pragma ("pragma% not allowed for renamed package");
1630 -- Pragma appears other than after a compilation unit
1633 -- Here we check for the generic instantiation case and also
1634 -- for the case of processing a generic formal package. We
1635 -- detect these cases by noting that the Sloc on the node
1636 -- does not belong to the current compilation unit.
1638 Sindex := Source_Index (Current_Sem_Unit);
1640 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1641 Rewrite (N, Make_Null_Statement (Loc));
1644 -- If before first declaration, the pragma applies to the
1645 -- enclosing unit, and the name if present must be this name.
1647 elsif Is_Before_First_Decl (N, Plist) then
1648 Unit_Node := Unit_Declaration_Node (Current_Scope);
1649 Unit_Kind := Nkind (Unit_Node);
1651 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1654 elsif Unit_Kind = N_Subprogram_Body
1655 and then not Acts_As_Spec (Unit_Node)
1659 elsif Nkind (Parent_Node) = N_Package_Body then
1662 elsif Nkind (Parent_Node) = N_Package_Specification
1663 and then Plist = Private_Declarations (Parent_Node)
1667 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1668 or else Nkind (Parent_Node) =
1669 N_Generic_Subprogram_Declaration)
1670 and then Plist = Generic_Formal_Declarations (Parent_Node)
1674 elsif Arg_Count > 0 then
1675 Analyze (Expression (Arg1));
1677 if Entity (Expression (Arg1)) /= Current_Scope then
1679 ("name in pragma% must be enclosing unit", Arg1);
1682 -- It is legal to have no argument in this context
1688 -- Error if not before first declaration. This is because a
1689 -- library unit pragma argument must be the name of a library
1690 -- unit (RM 10.1.5(7)), but the only names permitted in this
1691 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1692 -- generic subprogram declarations or generic instantiations.
1696 ("pragma% misplaced, must be before first declaration");
1700 end Check_Valid_Library_Unit_Pragma;
1706 procedure Check_Variant (Variant : Node_Id) is
1707 Clist : constant Node_Id := Component_List (Variant);
1711 if not Is_Non_Empty_List (Component_Items (Clist)) then
1713 ("Unchecked_Union may not have empty component list",
1718 Comp := First (Component_Items (Clist));
1719 while Present (Comp) loop
1720 Check_Component (Comp);
1729 procedure Error_Pragma (Msg : String) is
1731 Error_Msg_Name_1 := Pname;
1732 Error_Msg_N (Msg, N);
1736 ----------------------
1737 -- Error_Pragma_Arg --
1738 ----------------------
1740 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1742 Error_Msg_Name_1 := Pname;
1743 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1745 end Error_Pragma_Arg;
1747 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1749 Error_Msg_Name_1 := Pname;
1750 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1751 Error_Pragma_Arg (Msg2, Arg);
1752 end Error_Pragma_Arg;
1754 ----------------------------
1755 -- Error_Pragma_Arg_Ident --
1756 ----------------------------
1758 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1760 Error_Msg_Name_1 := Pname;
1761 Error_Msg_N (Msg, Arg);
1763 end Error_Pragma_Arg_Ident;
1765 ----------------------
1766 -- Error_Pragma_Ref --
1767 ----------------------
1769 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id) is
1771 Error_Msg_Name_1 := Pname;
1772 Error_Msg_Sloc := Sloc (Ref);
1773 Error_Msg_NE (Msg, N, Ref);
1775 end Error_Pragma_Ref;
1777 ------------------------
1778 -- Find_Lib_Unit_Name --
1779 ------------------------
1781 function Find_Lib_Unit_Name return Entity_Id is
1783 -- Return inner compilation unit entity, for case of nested
1784 -- categorization pragmas. This happens in generic unit.
1786 if Nkind (Parent (N)) = N_Package_Specification
1787 and then Defining_Entity (Parent (N)) /= Current_Scope
1789 return Defining_Entity (Parent (N));
1791 return Current_Scope;
1793 end Find_Lib_Unit_Name;
1795 ----------------------------
1796 -- Find_Program_Unit_Name --
1797 ----------------------------
1799 procedure Find_Program_Unit_Name (Id : Node_Id) is
1800 Unit_Name : Entity_Id;
1801 Unit_Kind : Node_Kind;
1802 P : constant Node_Id := Parent (N);
1805 if Nkind (P) = N_Compilation_Unit then
1806 Unit_Kind := Nkind (Unit (P));
1808 if Unit_Kind = N_Subprogram_Declaration
1809 or else Unit_Kind = N_Package_Declaration
1810 or else Unit_Kind in N_Generic_Declaration
1812 Unit_Name := Defining_Entity (Unit (P));
1814 if Chars (Id) = Chars (Unit_Name) then
1815 Set_Entity (Id, Unit_Name);
1816 Set_Etype (Id, Etype (Unit_Name));
1818 Set_Etype (Id, Any_Type);
1820 ("cannot find program unit referenced by pragma%");
1824 Set_Etype (Id, Any_Type);
1825 Error_Pragma ("pragma% inapplicable to this unit");
1831 end Find_Program_Unit_Name;
1833 -----------------------------------------
1834 -- Find_Unique_Parameterless_Procedure --
1835 -----------------------------------------
1837 function Find_Unique_Parameterless_Procedure
1839 Arg : Node_Id) return Entity_Id
1841 Proc : Entity_Id := Empty;
1844 -- The body of this procedure needs some comments ???
1846 if not Is_Entity_Name (Name) then
1848 ("argument of pragma% must be entity name", Arg);
1850 elsif not Is_Overloaded (Name) then
1851 Proc := Entity (Name);
1853 if Ekind (Proc) /= E_Procedure
1854 or else Present (First_Formal (Proc)) then
1856 ("argument of pragma% must be parameterless procedure", Arg);
1861 Found : Boolean := False;
1863 Index : Interp_Index;
1866 Get_First_Interp (Name, Index, It);
1867 while Present (It.Nam) loop
1870 if Ekind (Proc) = E_Procedure
1871 and then No (First_Formal (Proc))
1875 Set_Entity (Name, Proc);
1876 Set_Is_Overloaded (Name, False);
1879 ("ambiguous handler name for pragma% ", Arg);
1883 Get_Next_Interp (Index, It);
1888 ("argument of pragma% must be parameterless procedure",
1891 Proc := Entity (Name);
1897 end Find_Unique_Parameterless_Procedure;
1899 -------------------------
1900 -- Gather_Associations --
1901 -------------------------
1903 procedure Gather_Associations
1905 Args : out Args_List)
1910 -- Initialize all parameters to Empty
1912 for J in Args'Range loop
1916 -- That's all we have to do if there are no argument associations
1918 if No (Pragma_Argument_Associations (N)) then
1922 -- Otherwise first deal with any positional parameters present
1924 Arg := First (Pragma_Argument_Associations (N));
1925 for Index in Args'Range loop
1926 exit when No (Arg) or else Chars (Arg) /= No_Name;
1927 Args (Index) := Expression (Arg);
1931 -- Positional parameters all processed, if any left, then we
1932 -- have too many positional parameters.
1934 if Present (Arg) and then Chars (Arg) = No_Name then
1936 ("too many positional associations for pragma%", Arg);
1939 -- Process named parameters if any are present
1941 while Present (Arg) loop
1942 if Chars (Arg) = No_Name then
1944 ("positional association cannot follow named association",
1948 for Index in Names'Range loop
1949 if Names (Index) = Chars (Arg) then
1950 if Present (Args (Index)) then
1952 ("duplicate argument association for pragma%", Arg);
1954 Args (Index) := Expression (Arg);
1959 if Index = Names'Last then
1960 Error_Msg_Name_1 := Pname;
1961 Error_Msg_N ("pragma% does not allow & argument", Arg);
1963 -- Check for possible misspelling
1965 for Index1 in Names'Range loop
1966 if Is_Bad_Spelling_Of
1967 (Chars (Arg), Names (Index1))
1969 Error_Msg_Name_1 := Names (Index1);
1970 Error_Msg_N ("\possible misspelling of%", Arg);
1982 end Gather_Associations;
1988 procedure GNAT_Pragma is
1990 Check_Restriction (No_Implementation_Pragmas, N);
1993 --------------------------
1994 -- Is_Before_First_Decl --
1995 --------------------------
1997 function Is_Before_First_Decl
1998 (Pragma_Node : Node_Id;
1999 Decls : List_Id) return Boolean
2001 Item : Node_Id := First (Decls);
2004 -- Only other pragmas can come before this pragma
2007 if No (Item) or else Nkind (Item) /= N_Pragma then
2010 elsif Item = Pragma_Node then
2016 end Is_Before_First_Decl;
2018 -----------------------------
2019 -- Is_Configuration_Pragma --
2020 -----------------------------
2022 -- A configuration pragma must appear in the context clause of a
2023 -- compilation unit, and only other pragmas may precede it. Note that
2024 -- the test below also permits use in a configuration pragma file.
2026 function Is_Configuration_Pragma return Boolean is
2027 Lis : constant List_Id := List_Containing (N);
2028 Par : constant Node_Id := Parent (N);
2032 -- If no parent, then we are in the configuration pragma file,
2033 -- so the placement is definitely appropriate.
2038 -- Otherwise we must be in the context clause of a compilation unit
2039 -- and the only thing allowed before us in the context list is more
2040 -- configuration pragmas.
2042 elsif Nkind (Par) = N_Compilation_Unit
2043 and then Context_Items (Par) = Lis
2050 elsif Nkind (Prg) /= N_Pragma then
2060 end Is_Configuration_Pragma;
2062 --------------------------
2063 -- Is_In_Context_Clause --
2064 --------------------------
2066 function Is_In_Context_Clause return Boolean is
2068 Parent_Node : Node_Id;
2071 if not Is_List_Member (N) then
2075 Plist := List_Containing (N);
2076 Parent_Node := Parent (Plist);
2078 if Parent_Node = Empty
2079 or else Nkind (Parent_Node) /= N_Compilation_Unit
2080 or else Context_Items (Parent_Node) /= Plist
2087 end Is_In_Context_Clause;
2089 ---------------------------------
2090 -- Is_Static_String_Expression --
2091 ---------------------------------
2093 function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
2094 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
2097 Analyze_And_Resolve (Argx);
2098 return Is_OK_Static_Expression (Argx)
2099 and then Nkind (Argx) = N_String_Literal;
2100 end Is_Static_String_Expression;
2102 ----------------------
2103 -- Pragma_Misplaced --
2104 ----------------------
2106 procedure Pragma_Misplaced is
2108 Error_Pragma ("incorrect placement of pragma%");
2109 end Pragma_Misplaced;
2111 ------------------------------------
2112 -- Process Atomic_Shared_Volatile --
2113 ------------------------------------
2115 procedure Process_Atomic_Shared_Volatile is
2122 procedure Set_Atomic (E : Entity_Id);
2123 -- Set given type as atomic, and if no explicit alignment was given,
2124 -- set alignment to unknown, since back end knows what the alignment
2125 -- requirements are for atomic arrays. Note: this step is necessary
2126 -- for derived types.
2132 procedure Set_Atomic (E : Entity_Id) is
2136 if not Has_Alignment_Clause (E) then
2137 Set_Alignment (E, Uint_0);
2141 -- Start of processing for Process_Atomic_Shared_Volatile
2144 Check_Ada_83_Warning;
2145 Check_No_Identifiers;
2146 Check_Arg_Count (1);
2147 Check_Arg_Is_Local_Name (Arg1);
2148 E_Id := Expression (Arg1);
2150 if Etype (E_Id) = Any_Type then
2155 D := Declaration_Node (E);
2159 if Rep_Item_Too_Early (E, N)
2161 Rep_Item_Too_Late (E, N)
2165 Check_First_Subtype (Arg1);
2168 if Prag_Id /= Pragma_Volatile then
2170 Set_Atomic (Underlying_Type (E));
2171 Set_Atomic (Base_Type (E));
2174 -- Attribute belongs on the base type. If the view of the type is
2175 -- currently private, it also belongs on the underlying type.
2177 Set_Is_Volatile (Base_Type (E));
2178 Set_Is_Volatile (Underlying_Type (E));
2180 Set_Treat_As_Volatile (E);
2181 Set_Treat_As_Volatile (Underlying_Type (E));
2183 elsif K = N_Object_Declaration
2184 or else (K = N_Component_Declaration
2185 and then Original_Record_Component (E) = E)
2187 if Rep_Item_Too_Late (E, N) then
2191 if Prag_Id /= Pragma_Volatile then
2194 -- If the object declaration has an explicit initialization, a
2195 -- temporary may have to be created to hold the expression, to
2196 -- ensure that access to the object remain atomic.
2198 if Nkind (Parent (E)) = N_Object_Declaration
2199 and then Present (Expression (Parent (E)))
2201 Set_Has_Delayed_Freeze (E);
2204 -- An interesting improvement here. If an object of type X
2205 -- is declared atomic, and the type X is not atomic, that's
2206 -- a pity, since it may not have appropriate alignment etc.
2207 -- We can rescue this in the special case where the object
2208 -- and type are in the same unit by just setting the type
2209 -- as atomic, so that the back end will process it as atomic.
2211 Utyp := Underlying_Type (Etype (E));
2214 and then Sloc (E) > No_Location
2215 and then Sloc (Utyp) > No_Location
2217 Get_Source_File_Index (Sloc (E)) =
2218 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
2220 Set_Is_Atomic (Underlying_Type (Etype (E)));
2224 Set_Is_Volatile (E);
2225 Set_Treat_As_Volatile (E);
2229 ("inappropriate entity for pragma%", Arg1);
2231 end Process_Atomic_Shared_Volatile;
2233 -------------------------------------------
2234 -- Process_Compile_Time_Warning_Or_Error --
2235 -------------------------------------------
2237 procedure Process_Compile_Time_Warning_Or_Error is
2238 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
2241 Check_Arg_Count (2);
2242 Check_No_Identifiers;
2243 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
2244 Analyze_And_Resolve (Arg1x, Standard_Boolean);
2246 if Compile_Time_Known_Value (Arg1x) then
2247 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
2249 Str : constant String_Id :=
2250 Strval (Get_Pragma_Arg (Arg2));
2251 Len : constant Int := String_Length (Str);
2256 Cent : constant Entity_Id :=
2257 Cunit_Entity (Current_Sem_Unit);
2259 Force : constant Boolean :=
2260 Prag_Id = Pragma_Compile_Time_Warning
2262 Is_Spec_Name (Unit_Name (Current_Sem_Unit))
2263 and then (Ekind (Cent) /= E_Package
2264 or else not In_Private_Part (Cent));
2265 -- Set True if this is the warning case, and we are in the
2266 -- visible part of a package spec, or in a subprogram spec,
2267 -- in which case we want to force the client to see the
2268 -- warning, even though it is not in the main unit.
2271 -- Loop through segments of message separated by line
2272 -- feeds. We output these segments as separate messages
2273 -- with continuation marks for all but the first.
2278 Error_Msg_Strlen := 0;
2280 -- Loop to copy characters from argument to error
2281 -- message string buffer.
2284 exit when Ptr > Len;
2285 CC := Get_String_Char (Str, Ptr);
2288 -- Ignore wide chars ??? else store character
2290 if In_Character_Range (CC) then
2291 C := Get_Character (CC);
2292 exit when C = ASCII.LF;
2293 Error_Msg_Strlen := Error_Msg_Strlen + 1;
2294 Error_Msg_String (Error_Msg_Strlen) := C;
2298 -- Here with one line ready to go
2300 Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning;
2302 -- If this is a warning in a spec, then we want clients
2303 -- to see the warning, so mark the message with the
2304 -- special sequence !! to force the warning. In the case
2305 -- of a package spec, we do not force this if we are in
2306 -- the private part of the spec.
2309 if Cont = False then
2310 Error_Msg_N ("<~!!", Arg1);
2313 Error_Msg_N ("\<~!!", Arg1);
2316 -- Error, rather than warning, or in a body, so we do not
2317 -- need to force visibility for client (error will be
2318 -- output in any case, and this is the situation in which
2319 -- we do not want a client to get a warning, since the
2320 -- warning is in the body or the spec private part.
2323 if Cont = False then
2324 Error_Msg_N ("<~", Arg1);
2327 Error_Msg_N ("\<~", Arg1);
2331 exit when Ptr > Len;
2336 end Process_Compile_Time_Warning_Or_Error;
2338 ------------------------
2339 -- Process_Convention --
2340 ------------------------
2342 procedure Process_Convention
2343 (C : out Convention_Id;
2349 Comp_Unit : Unit_Number_Type;
2351 procedure Set_Convention_From_Pragma (E : Entity_Id);
2352 -- Set convention in entity E, and also flag that the entity has a
2353 -- convention pragma. If entity is for a private or incomplete type,
2354 -- also set convention and flag on underlying type. This procedure
2355 -- also deals with the special case of C_Pass_By_Copy convention.
2357 --------------------------------
2358 -- Set_Convention_From_Pragma --
2359 --------------------------------
2361 procedure Set_Convention_From_Pragma (E : Entity_Id) is
2363 -- Ada 2005 (AI-430): Check invalid attempt to change convention
2364 -- for an overridden dispatching operation. Technically this is
2365 -- an amendment and should only be done in Ada 2005 mode. However,
2366 -- this is clearly a mistake, since the problem that is addressed
2367 -- by this AI is that there is a clear gap in the RM!
2369 if Is_Dispatching_Operation (E)
2370 and then Present (Overridden_Operation (E))
2371 and then C /= Convention (Overridden_Operation (E))
2374 ("cannot change convention for " &
2375 "overridden dispatching operation",
2379 -- Set the convention
2381 Set_Convention (E, C);
2382 Set_Has_Convention_Pragma (E);
2384 if Is_Incomplete_Or_Private_Type (E) then
2385 Set_Convention (Underlying_Type (E), C);
2386 Set_Has_Convention_Pragma (Underlying_Type (E), True);
2389 -- A class-wide type should inherit the convention of
2390 -- the specific root type (although this isn't specified
2391 -- clearly by the RM).
2393 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
2394 Set_Convention (Class_Wide_Type (E), C);
2397 -- If the entity is a record type, then check for special case of
2398 -- C_Pass_By_Copy, which is treated the same as C except that the
2399 -- special record flag is set. This convention is only permitted
2400 -- on record types (see AI95-00131).
2402 if Cname = Name_C_Pass_By_Copy then
2403 if Is_Record_Type (E) then
2404 Set_C_Pass_By_Copy (Base_Type (E));
2405 elsif Is_Incomplete_Or_Private_Type (E)
2406 and then Is_Record_Type (Underlying_Type (E))
2408 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
2411 ("C_Pass_By_Copy convention allowed only for record type",
2416 -- If the entity is a derived boolean type, check for the
2417 -- special case of convention C, C++, or Fortran, where we
2418 -- consider any nonzero value to represent true.
2420 if Is_Discrete_Type (E)
2421 and then Root_Type (Etype (E)) = Standard_Boolean
2427 C = Convention_Fortran)
2429 Set_Nonzero_Is_True (Base_Type (E));
2431 end Set_Convention_From_Pragma;
2433 -- Start of processing for Process_Convention
2436 Check_At_Least_N_Arguments (2);
2437 Check_Optional_Identifier (Arg1, Name_Convention);
2438 Check_Arg_Is_Identifier (Arg1);
2439 Cname := Chars (Expression (Arg1));
2441 -- C_Pass_By_Copy is treated as a synonym for convention C
2442 -- (this is tested again below to set the critical flag)
2444 if Cname = Name_C_Pass_By_Copy then
2447 -- Otherwise we must have something in the standard convention list
2449 elsif Is_Convention_Name (Cname) then
2450 C := Get_Convention_Id (Chars (Expression (Arg1)));
2452 -- In DEC VMS, it seems that there is an undocumented feature that
2453 -- any unrecognized convention is treated as the default, which for
2454 -- us is convention C. It does not seem so terrible to do this
2455 -- unconditionally, silently in the VMS case, and with a warning
2456 -- in the non-VMS case.
2459 if Warn_On_Export_Import and not OpenVMS_On_Target then
2461 ("?unrecognized convention name, C assumed",
2468 Check_Optional_Identifier (Arg2, Name_Entity);
2469 Check_Arg_Is_Local_Name (Arg2);
2471 Id := Expression (Arg2);
2474 if not Is_Entity_Name (Id) then
2475 Error_Pragma_Arg ("entity name required", Arg2);
2480 -- Go to renamed subprogram if present, since convention applies to
2481 -- the actual renamed entity, not to the renaming entity. If the
2482 -- subprogram is inherited, go to parent subprogram.
2484 if Is_Subprogram (E)
2485 and then Present (Alias (E))
2487 if Nkind (Parent (Declaration_Node (E))) =
2488 N_Subprogram_Renaming_Declaration
2490 if Scope (E) /= Scope (Alias (E)) then
2492 ("cannot apply pragma% to non-local entity&#", E);
2497 elsif Nkind_In (Parent (E), N_Full_Type_Declaration,
2498 N_Private_Extension_Declaration)
2499 and then Scope (E) = Scope (Alias (E))
2505 -- Check that we are not applying this to a specless body
2507 if Is_Subprogram (E)
2508 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2511 ("pragma% requires separate spec and must come before body");
2514 -- Check that we are not applying this to a named constant
2516 if Ekind (E) = E_Named_Integer
2518 Ekind (E) = E_Named_Real
2520 Error_Msg_Name_1 := Pname;
2522 ("cannot apply pragma% to named constant!",
2523 Get_Pragma_Arg (Arg2));
2525 ("\supply appropriate type for&!", Arg2);
2528 if Ekind (E) = E_Enumeration_Literal then
2529 Error_Pragma ("enumeration literal not allowed for pragma%");
2532 -- Check for rep item appearing too early or too late
2534 if Etype (E) = Any_Type
2535 or else Rep_Item_Too_Early (E, N)
2539 E := Underlying_Type (E);
2542 if Rep_Item_Too_Late (E, N) then
2546 if Has_Convention_Pragma (E) then
2548 ("at most one Convention/Export/Import pragma is allowed", Arg2);
2550 elsif Convention (E) = Convention_Protected
2551 or else Ekind (Scope (E)) = E_Protected_Type
2554 ("a protected operation cannot be given a different convention",
2558 -- For Intrinsic, a subprogram is required
2560 if C = Convention_Intrinsic
2561 and then not Is_Subprogram (E)
2562 and then not Is_Generic_Subprogram (E)
2565 ("second argument of pragma% must be a subprogram", Arg2);
2568 -- For Stdcall, a subprogram, variable or subprogram type is required
2570 if C = Convention_Stdcall
2571 and then not Is_Subprogram (E)
2572 and then not Is_Generic_Subprogram (E)
2573 and then Ekind (E) /= E_Variable
2576 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2579 ("second argument of pragma% must be subprogram (type)",
2583 if not Is_Subprogram (E)
2584 and then not Is_Generic_Subprogram (E)
2586 Set_Convention_From_Pragma (E);
2590 Check_First_Subtype (Arg2);
2591 Set_Convention_From_Pragma (Base_Type (E));
2593 -- For subprograms, we must set the convention on the
2594 -- internally generated directly designated type as well.
2596 if Ekind (E) = E_Access_Subprogram_Type then
2597 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2601 -- For the subprogram case, set proper convention for all homonyms
2602 -- in same scope and the same declarative part, i.e. the same
2603 -- compilation unit.
2606 Comp_Unit := Get_Source_Unit (E);
2607 Set_Convention_From_Pragma (E);
2609 -- Treat a pragma Import as an implicit body, for GPS use
2611 if Prag_Id = Pragma_Import then
2612 Generate_Reference (E, Id, 'b');
2618 exit when No (E1) or else Scope (E1) /= Current_Scope;
2620 -- Do not set the pragma on inherited operations or on
2621 -- formal subprograms.
2623 if Comes_From_Source (E1)
2624 and then Comp_Unit = Get_Source_Unit (E1)
2625 and then not Is_Formal_Subprogram (E1)
2626 and then Nkind (Original_Node (Parent (E1))) /=
2627 N_Full_Type_Declaration
2629 if Present (Alias (E1))
2630 and then Scope (E1) /= Scope (Alias (E1))
2633 ("cannot apply pragma% to non-local entity& declared#",
2637 Set_Convention_From_Pragma (E1);
2639 if Prag_Id = Pragma_Import then
2640 Generate_Reference (E, Id, 'b');
2645 end Process_Convention;
2647 -----------------------------------------------------
2648 -- Process_Extended_Import_Export_Exception_Pragma --
2649 -----------------------------------------------------
2651 procedure Process_Extended_Import_Export_Exception_Pragma
2652 (Arg_Internal : Node_Id;
2653 Arg_External : Node_Id;
2661 if not OpenVMS_On_Target then
2663 ("?pragma% ignored (applies only to Open'V'M'S)");
2666 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2667 Def_Id := Entity (Arg_Internal);
2669 if Ekind (Def_Id) /= E_Exception then
2671 ("pragma% must refer to declared exception", Arg_Internal);
2674 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2676 if Present (Arg_Form) then
2677 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2680 if Present (Arg_Form)
2681 and then Chars (Arg_Form) = Name_Ada
2685 Set_Is_VMS_Exception (Def_Id);
2686 Set_Exception_Code (Def_Id, No_Uint);
2689 if Present (Arg_Code) then
2690 if not Is_VMS_Exception (Def_Id) then
2692 ("Code option for pragma% not allowed for Ada case",
2696 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2697 Code_Val := Expr_Value (Arg_Code);
2699 if not UI_Is_In_Int_Range (Code_Val) then
2701 ("Code option for pragma% must be in 32-bit range",
2705 Set_Exception_Code (Def_Id, Code_Val);
2708 end Process_Extended_Import_Export_Exception_Pragma;
2710 -------------------------------------------------
2711 -- Process_Extended_Import_Export_Internal_Arg --
2712 -------------------------------------------------
2714 procedure Process_Extended_Import_Export_Internal_Arg
2715 (Arg_Internal : Node_Id := Empty)
2718 if No (Arg_Internal) then
2719 Error_Pragma ("Internal parameter required for pragma%");
2722 if Nkind (Arg_Internal) = N_Identifier then
2725 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2726 and then (Prag_Id = Pragma_Import_Function
2728 Prag_Id = Pragma_Export_Function)
2734 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2737 Check_Arg_Is_Local_Name (Arg_Internal);
2738 end Process_Extended_Import_Export_Internal_Arg;
2740 --------------------------------------------------
2741 -- Process_Extended_Import_Export_Object_Pragma --
2742 --------------------------------------------------
2744 procedure Process_Extended_Import_Export_Object_Pragma
2745 (Arg_Internal : Node_Id;
2746 Arg_External : Node_Id;
2752 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2753 Def_Id := Entity (Arg_Internal);
2755 if Ekind (Def_Id) /= E_Constant
2756 and then Ekind (Def_Id) /= E_Variable
2759 ("pragma% must designate an object", Arg_Internal);
2762 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2764 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2767 ("previous Common/Psect_Object applies, pragma % not permitted",
2771 if Rep_Item_Too_Late (Def_Id, N) then
2775 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2777 if Present (Arg_Size) then
2778 Check_Arg_Is_External_Name (Arg_Size);
2781 -- Export_Object case
2783 if Prag_Id = Pragma_Export_Object then
2784 if not Is_Library_Level_Entity (Def_Id) then
2786 ("argument for pragma% must be library level entity",
2790 if Ekind (Current_Scope) = E_Generic_Package then
2791 Error_Pragma ("pragma& cannot appear in a generic unit");
2794 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2796 ("exported object must have compile time known size",
2800 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2802 ("?duplicate Export_Object pragma", N);
2804 Set_Exported (Def_Id, Arg_Internal);
2807 -- Import_Object case
2810 if Is_Concurrent_Type (Etype (Def_Id)) then
2812 ("cannot use pragma% for task/protected object",
2816 if Ekind (Def_Id) = E_Constant then
2818 ("cannot import a constant", Arg_Internal);
2821 if Warn_On_Export_Import
2822 and then Has_Discriminants (Etype (Def_Id))
2825 ("imported value must be initialized?", Arg_Internal);
2828 if Warn_On_Export_Import
2829 and then Is_Access_Type (Etype (Def_Id))
2832 ("cannot import object of an access type?", Arg_Internal);
2835 if Warn_On_Export_Import
2836 and then Is_Imported (Def_Id)
2839 ("?duplicate Import_Object pragma", N);
2841 -- Check for explicit initialization present. Note that an
2842 -- initialization that generated by the code generator, e.g.
2843 -- for an access type, does not count here.
2845 elsif Present (Expression (Parent (Def_Id)))
2848 (Original_Node (Expression (Parent (Def_Id))))
2850 Error_Msg_Sloc := Sloc (Def_Id);
2852 ("imported entities cannot be initialized (RM B.1(24))",
2853 "\no initialization allowed for & declared#", Arg1);
2855 Set_Imported (Def_Id);
2856 Note_Possible_Modification (Arg_Internal, Sure => False);
2859 end Process_Extended_Import_Export_Object_Pragma;
2861 ------------------------------------------------------
2862 -- Process_Extended_Import_Export_Subprogram_Pragma --
2863 ------------------------------------------------------
2865 procedure Process_Extended_Import_Export_Subprogram_Pragma
2866 (Arg_Internal : Node_Id;
2867 Arg_External : Node_Id;
2868 Arg_Parameter_Types : Node_Id;
2869 Arg_Result_Type : Node_Id := Empty;
2870 Arg_Mechanism : Node_Id;
2871 Arg_Result_Mechanism : Node_Id := Empty;
2872 Arg_First_Optional_Parameter : Node_Id := Empty)
2878 Ambiguous : Boolean;
2882 function Same_Base_Type
2884 Formal : Entity_Id) return Boolean;
2885 -- Determines if Ptype references the type of Formal. Note that
2886 -- only the base types need to match according to the spec. Ptype
2887 -- here is the argument from the pragma, which is either a type
2888 -- name, or an access attribute.
2890 --------------------
2891 -- Same_Base_Type --
2892 --------------------
2894 function Same_Base_Type
2896 Formal : Entity_Id) return Boolean
2898 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2902 -- Case where pragma argument is typ'Access
2904 if Nkind (Ptype) = N_Attribute_Reference
2905 and then Attribute_Name (Ptype) = Name_Access
2907 Pref := Prefix (Ptype);
2910 if not Is_Entity_Name (Pref)
2911 or else Entity (Pref) = Any_Type
2916 -- We have a match if the corresponding argument is of an
2917 -- anonymous access type, and its designated type matches
2918 -- the type of the prefix of the access attribute
2920 return Ekind (Ftyp) = E_Anonymous_Access_Type
2921 and then Base_Type (Entity (Pref)) =
2922 Base_Type (Etype (Designated_Type (Ftyp)));
2924 -- Case where pragma argument is a type name
2929 if not Is_Entity_Name (Ptype)
2930 or else Entity (Ptype) = Any_Type
2935 -- We have a match if the corresponding argument is of
2936 -- the type given in the pragma (comparing base types)
2938 return Base_Type (Entity (Ptype)) = Ftyp;
2942 -- Start of processing for
2943 -- Process_Extended_Import_Export_Subprogram_Pragma
2946 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2950 -- Loop through homonyms (overloadings) of the entity
2952 Hom_Id := Entity (Arg_Internal);
2953 while Present (Hom_Id) loop
2954 Def_Id := Get_Base_Subprogram (Hom_Id);
2956 -- We need a subprogram in the current scope
2958 if not Is_Subprogram (Def_Id)
2959 or else Scope (Def_Id) /= Current_Scope
2966 -- Pragma cannot apply to subprogram body
2968 if Is_Subprogram (Def_Id)
2969 and then Nkind (Parent (Declaration_Node (Def_Id))) =
2973 ("pragma% requires separate spec"
2974 & " and must come before body");
2977 -- Test result type if given, note that the result type
2978 -- parameter can only be present for the function cases.
2980 if Present (Arg_Result_Type)
2981 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2985 elsif Etype (Def_Id) /= Standard_Void_Type
2987 (Pname = Name_Export_Procedure
2989 Pname = Name_Import_Procedure)
2993 -- Test parameter types if given. Note that this parameter
2994 -- has not been analyzed (and must not be, since it is
2995 -- semantic nonsense), so we get it as the parser left it.
2997 elsif Present (Arg_Parameter_Types) then
2998 Check_Matching_Types : declare
3003 Formal := First_Formal (Def_Id);
3005 if Nkind (Arg_Parameter_Types) = N_Null then
3006 if Present (Formal) then
3010 -- A list of one type, e.g. (List) is parsed as
3011 -- a parenthesized expression.
3013 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
3014 and then Paren_Count (Arg_Parameter_Types) = 1
3017 or else Present (Next_Formal (Formal))
3022 Same_Base_Type (Arg_Parameter_Types, Formal);
3025 -- A list of more than one type is parsed as a aggregate
3027 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
3028 and then Paren_Count (Arg_Parameter_Types) = 0
3030 Ptype := First (Expressions (Arg_Parameter_Types));
3031 while Present (Ptype) or else Present (Formal) loop
3034 or else not Same_Base_Type (Ptype, Formal)
3039 Next_Formal (Formal);
3044 -- Anything else is of the wrong form
3048 ("wrong form for Parameter_Types parameter",
3049 Arg_Parameter_Types);
3051 end Check_Matching_Types;
3054 -- Match is now False if the entry we found did not match
3055 -- either a supplied Parameter_Types or Result_Types argument
3061 -- Ambiguous case, the flag Ambiguous shows if we already
3062 -- detected this and output the initial messages.
3065 if not Ambiguous then
3067 Error_Msg_Name_1 := Pname;
3069 ("pragma% does not uniquely identify subprogram!",
3071 Error_Msg_Sloc := Sloc (Ent);
3072 Error_Msg_N ("matching subprogram #!", N);
3076 Error_Msg_Sloc := Sloc (Def_Id);
3077 Error_Msg_N ("matching subprogram #!", N);
3082 Hom_Id := Homonym (Hom_Id);
3085 -- See if we found an entry
3088 if not Ambiguous then
3089 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
3091 ("pragma% cannot be given for generic subprogram");
3094 ("pragma% does not identify local subprogram");
3101 -- Import pragmas must be for imported entities
3103 if Prag_Id = Pragma_Import_Function
3105 Prag_Id = Pragma_Import_Procedure
3107 Prag_Id = Pragma_Import_Valued_Procedure
3109 if not Is_Imported (Ent) then
3111 ("pragma Import or Interface must precede pragma%");
3114 -- Here we have the Export case which can set the entity as exported
3116 -- But does not do so if the specified external name is null, since
3117 -- that is taken as a signal in DEC Ada 83 (with which we want to be
3118 -- compatible) to request no external name.
3120 elsif Nkind (Arg_External) = N_String_Literal
3121 and then String_Length (Strval (Arg_External)) = 0
3125 -- In all other cases, set entity as exported
3128 Set_Exported (Ent, Arg_Internal);
3131 -- Special processing for Valued_Procedure cases
3133 if Prag_Id = Pragma_Import_Valued_Procedure
3135 Prag_Id = Pragma_Export_Valued_Procedure
3137 Formal := First_Formal (Ent);
3141 ("at least one parameter required for pragma%");
3143 elsif Ekind (Formal) /= E_Out_Parameter then
3145 ("first parameter must have mode out for pragma%");
3148 Set_Is_Valued_Procedure (Ent);
3152 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
3154 -- Process Result_Mechanism argument if present. We have already
3155 -- checked that this is only allowed for the function case.
3157 if Present (Arg_Result_Mechanism) then
3158 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
3161 -- Process Mechanism parameter if present. Note that this parameter
3162 -- is not analyzed, and must not be analyzed since it is semantic
3163 -- nonsense, so we get it in exactly as the parser left it.
3165 if Present (Arg_Mechanism) then
3173 -- A single mechanism association without a formal parameter
3174 -- name is parsed as a parenthesized expression. All other
3175 -- cases are parsed as aggregates, so we rewrite the single
3176 -- parameter case as an aggregate for consistency.
3178 if Nkind (Arg_Mechanism) /= N_Aggregate
3179 and then Paren_Count (Arg_Mechanism) = 1
3181 Rewrite (Arg_Mechanism,
3182 Make_Aggregate (Sloc (Arg_Mechanism),
3183 Expressions => New_List (
3184 Relocate_Node (Arg_Mechanism))));
3187 -- Case of only mechanism name given, applies to all formals
3189 if Nkind (Arg_Mechanism) /= N_Aggregate then
3190 Formal := First_Formal (Ent);
3191 while Present (Formal) loop
3192 Set_Mechanism_Value (Formal, Arg_Mechanism);
3193 Next_Formal (Formal);
3196 -- Case of list of mechanism associations given
3199 if Null_Record_Present (Arg_Mechanism) then
3201 ("inappropriate form for Mechanism parameter",
3205 -- Deal with positional ones first
3207 Formal := First_Formal (Ent);
3209 if Present (Expressions (Arg_Mechanism)) then
3210 Mname := First (Expressions (Arg_Mechanism));
3211 while Present (Mname) loop
3214 ("too many mechanism associations", Mname);
3217 Set_Mechanism_Value (Formal, Mname);
3218 Next_Formal (Formal);
3223 -- Deal with named entries
3225 if Present (Component_Associations (Arg_Mechanism)) then
3226 Massoc := First (Component_Associations (Arg_Mechanism));
3227 while Present (Massoc) loop
3228 Choice := First (Choices (Massoc));
3230 if Nkind (Choice) /= N_Identifier
3231 or else Present (Next (Choice))
3234 ("incorrect form for mechanism association",
3238 Formal := First_Formal (Ent);
3242 ("parameter name & not present", Choice);
3245 if Chars (Choice) = Chars (Formal) then
3247 (Formal, Expression (Massoc));
3249 -- Set entity on identifier for ASIS
3251 Set_Entity (Choice, Formal);
3256 Next_Formal (Formal);
3266 -- Process First_Optional_Parameter argument if present. We have
3267 -- already checked that this is only allowed for the Import case.
3269 if Present (Arg_First_Optional_Parameter) then
3270 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
3272 ("first optional parameter must be formal parameter name",
3273 Arg_First_Optional_Parameter);
3276 Formal := First_Formal (Ent);
3280 ("specified formal parameter& not found",
3281 Arg_First_Optional_Parameter);
3284 exit when Chars (Formal) =
3285 Chars (Arg_First_Optional_Parameter);
3287 Next_Formal (Formal);
3290 Set_First_Optional_Parameter (Ent, Formal);
3292 -- Check specified and all remaining formals have right form
3294 while Present (Formal) loop
3295 if Ekind (Formal) /= E_In_Parameter then
3297 ("optional formal& is not of mode in!",
3298 Arg_First_Optional_Parameter, Formal);
3301 Dval := Default_Value (Formal);
3305 ("optional formal& does not have default value!",
3306 Arg_First_Optional_Parameter, Formal);
3308 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
3313 ("default value for optional formal& is non-static!",
3314 Arg_First_Optional_Parameter, Formal);
3318 Set_Is_Optional_Parameter (Formal);
3319 Next_Formal (Formal);
3322 end Process_Extended_Import_Export_Subprogram_Pragma;
3324 --------------------------
3325 -- Process_Generic_List --
3326 --------------------------
3328 procedure Process_Generic_List is
3333 Check_No_Identifiers;
3334 Check_At_Least_N_Arguments (1);
3337 while Present (Arg) loop
3338 Exp := Expression (Arg);
3341 if not Is_Entity_Name (Exp)
3343 (not Is_Generic_Instance (Entity (Exp))
3345 not Is_Generic_Unit (Entity (Exp)))
3348 ("pragma% argument must be name of generic unit/instance",
3354 end Process_Generic_List;
3356 ---------------------------------
3357 -- Process_Import_Or_Interface --
3358 ---------------------------------
3360 procedure Process_Import_Or_Interface is
3366 Process_Convention (C, Def_Id);
3367 Kill_Size_Check_Code (Def_Id);
3368 Note_Possible_Modification (Expression (Arg2), Sure => False);
3370 if Ekind (Def_Id) = E_Variable
3372 Ekind (Def_Id) = E_Constant
3374 -- We do not permit Import to apply to a renaming declaration
3376 if Present (Renamed_Object (Def_Id)) then
3378 ("pragma% not allowed for object renaming", Arg2);
3380 -- User initialization is not allowed for imported object, but
3381 -- the object declaration may contain a default initialization,
3382 -- that will be discarded. Note that an explicit initialization
3383 -- only counts if it comes from source, otherwise it is simply
3384 -- the code generator making an implicit initialization explicit.
3386 elsif Present (Expression (Parent (Def_Id)))
3387 and then Comes_From_Source (Expression (Parent (Def_Id)))
3389 Error_Msg_Sloc := Sloc (Def_Id);
3391 ("no initialization allowed for declaration of& #",
3392 "\imported entities cannot be initialized (RM B.1(24))",
3396 Set_Imported (Def_Id);
3397 Process_Interface_Name (Def_Id, Arg3, Arg4);
3399 -- Note that we do not set Is_Public here. That's because we
3400 -- only want to set it if there is no address clause, and we
3401 -- don't know that yet, so we delay that processing till
3404 -- pragma Import completes deferred constants
3406 if Ekind (Def_Id) = E_Constant then
3407 Set_Has_Completion (Def_Id);
3410 -- It is not possible to import a constant of an unconstrained
3411 -- array type (e.g. string) because there is no simple way to
3412 -- write a meaningful subtype for it.
3414 if Is_Array_Type (Etype (Def_Id))
3415 and then not Is_Constrained (Etype (Def_Id))
3418 ("imported constant& must have a constrained subtype",
3423 elsif Is_Subprogram (Def_Id)
3424 or else Is_Generic_Subprogram (Def_Id)
3426 -- If the name is overloaded, pragma applies to all of the
3427 -- denoted entities in the same declarative part.
3430 while Present (Hom_Id) loop
3431 Def_Id := Get_Base_Subprogram (Hom_Id);
3433 -- Ignore inherited subprograms because the pragma will
3434 -- apply to the parent operation, which is the one called.
3436 if Is_Overloadable (Def_Id)
3437 and then Present (Alias (Def_Id))
3441 -- If it is not a subprogram, it must be in an outer
3442 -- scope and pragma does not apply.
3444 elsif not Is_Subprogram (Def_Id)
3445 and then not Is_Generic_Subprogram (Def_Id)
3449 -- Verify that the homonym is in the same declarative
3450 -- part (not just the same scope).
3452 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
3453 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
3458 Set_Imported (Def_Id);
3460 -- Special processing for Convention_Intrinsic
3462 if C = Convention_Intrinsic then
3464 -- Link_Name argument not allowed for intrinsic
3467 and then Chars (Arg3) = Name_Link_Name
3472 if Present (Arg4) then
3474 ("Link_Name argument not allowed for " &
3479 Set_Is_Intrinsic_Subprogram (Def_Id);
3481 -- If no external name is present, then check that
3482 -- this is a valid intrinsic subprogram. If an external
3483 -- name is present, then this is handled by the back end.
3486 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
3490 -- All interfaced procedures need an external symbol
3491 -- created for them since they are always referenced
3492 -- from another object file.
3494 Set_Is_Public (Def_Id);
3496 -- Verify that the subprogram does not have a completion
3497 -- through a renaming declaration. For other completions
3498 -- the pragma appears as a too late representation.
3501 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3505 and then Nkind (Decl) = N_Subprogram_Declaration
3506 and then Present (Corresponding_Body (Decl))
3507 and then Nkind (Unit_Declaration_Node
3508 (Corresponding_Body (Decl))) =
3509 N_Subprogram_Renaming_Declaration
3511 Error_Msg_Sloc := Sloc (Def_Id);
3513 ("cannot import&, renaming already provided for " &
3514 "declaration #", N, Def_Id);
3518 Set_Has_Completion (Def_Id);
3519 Process_Interface_Name (Def_Id, Arg3, Arg4);
3522 if Is_Compilation_Unit (Hom_Id) then
3524 -- Its possible homonyms are not affected by the pragma.
3525 -- Such homonyms might be present in the context of other
3526 -- units being compiled.
3531 Hom_Id := Homonym (Hom_Id);
3535 -- When the convention is Java or CIL, we also allow Import to be
3536 -- given for packages, generic packages, exceptions, and record
3539 elsif (C = Convention_Java or else C = Convention_CIL)
3541 (Is_Package_Or_Generic_Package (Def_Id)
3542 or else Ekind (Def_Id) = E_Exception
3543 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3545 Set_Imported (Def_Id);
3546 Set_Is_Public (Def_Id);
3547 Process_Interface_Name (Def_Id, Arg3, Arg4);
3549 -- Import a CPP class
3551 elsif Is_Record_Type (Def_Id)
3552 and then C = Convention_CPP
3554 if not Is_Tagged_Type (Def_Id) then
3555 Error_Msg_Sloc := Sloc (Def_Id);
3556 Error_Pragma_Arg ("imported 'C'P'P type must be tagged", Arg2);
3559 -- Types treated as CPP classes are treated as limited, but we
3560 -- don't require them to be declared this way. A warning is
3561 -- issued to encourage the user to declare them as limited.
3562 -- This is not an error, for compatibility reasons, because
3563 -- these types have been supported this way for some time.
3565 if not Is_Limited_Type (Def_Id) then
3567 ("imported 'C'P'P type should be " &
3568 "explicitly declared limited?",
3569 Get_Pragma_Arg (Arg2));
3571 ("\type will be considered limited",
3572 Get_Pragma_Arg (Arg2));
3575 Set_Is_CPP_Class (Def_Id);
3576 Set_Is_Limited_Record (Def_Id);
3581 ("second argument of pragma% must be object or subprogram",
3585 -- If this pragma applies to a compilation unit, then the unit,
3586 -- which is a subprogram, does not require (or allow) a body.
3587 -- We also do not need to elaborate imported procedures.
3589 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3591 Cunit : constant Node_Id := Parent (Parent (N));
3593 Set_Body_Required (Cunit, False);
3596 end Process_Import_Or_Interface;
3598 --------------------
3599 -- Process_Inline --
3600 --------------------
3602 procedure Process_Inline (Active : Boolean) is
3608 Effective : Boolean := False;
3610 procedure Make_Inline (Subp : Entity_Id);
3611 -- Subp is the defining unit name of the subprogram
3612 -- declaration. Set the flag, as well as the flag in the
3613 -- corresponding body, if there is one present.
3615 procedure Set_Inline_Flags (Subp : Entity_Id);
3616 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp and also
3617 -- Has_Pragma_Inline_Always for the Inline_Always case.
3619 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3620 -- Returns True if it can be determined at this stage that inlining
3621 -- is not possible, for example if the body is available and contains
3622 -- exception handlers, we prevent inlining, since otherwise we can
3623 -- get undefined symbols at link time. This function also emits a
3624 -- warning if front-end inlining is enabled and the pragma appears
3627 -- ??? is business with link symbols still valid, or does it relate
3628 -- to front end ZCX which is being phased out ???
3630 ---------------------------
3631 -- Inlining_Not_Possible --
3632 ---------------------------
3634 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3635 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3639 if Nkind (Decl) = N_Subprogram_Body then
3640 Stats := Handled_Statement_Sequence (Decl);
3641 return Present (Exception_Handlers (Stats))
3642 or else Present (At_End_Proc (Stats));
3644 elsif Nkind (Decl) = N_Subprogram_Declaration
3645 and then Present (Corresponding_Body (Decl))
3647 if Front_End_Inlining
3648 and then Analyzed (Corresponding_Body (Decl))
3650 Error_Msg_N ("pragma appears too late, ignored?", N);
3653 -- If the subprogram is a renaming as body, the body is
3654 -- just a call to the renamed subprogram, and inlining is
3655 -- trivially possible.
3658 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
3659 N_Subprogram_Renaming_Declaration
3665 Handled_Statement_Sequence
3666 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3669 Present (Exception_Handlers (Stats))
3670 or else Present (At_End_Proc (Stats));
3674 -- If body is not available, assume the best, the check is
3675 -- performed again when compiling enclosing package bodies.
3679 end Inlining_Not_Possible;
3685 procedure Make_Inline (Subp : Entity_Id) is
3686 Kind : constant Entity_Kind := Ekind (Subp);
3687 Inner_Subp : Entity_Id := Subp;
3690 -- Ignore if bad type, avoid cascaded error
3692 if Etype (Subp) = Any_Type then
3696 -- Ignore if all inlining is suppressed
3698 elsif Suppress_All_Inlining then
3702 -- If inlining is not possible, for now do not treat as an error
3704 elsif Inlining_Not_Possible (Subp) then
3708 -- Here we have a candidate for inlining, but we must exclude
3709 -- derived operations. Otherwise we would end up trying to inline
3710 -- a phantom declaration, and the result would be to drag in a
3711 -- body which has no direct inlining associated with it. That
3712 -- would not only be inefficient but would also result in the
3713 -- backend doing cross-unit inlining in cases where it was
3714 -- definitely inappropriate to do so.
3716 -- However, a simple Comes_From_Source test is insufficient, since
3717 -- we do want to allow inlining of generic instances which also do
3718 -- not come from source. We also need to recognize specs
3719 -- generated by the front-end for bodies that carry the pragma.
3720 -- Finally, predefined operators do not come from source but are
3721 -- not inlineable either.
3723 elsif Is_Generic_Instance (Subp)
3724 or else Nkind (Parent (Parent (Subp))) = N_Subprogram_Declaration
3728 elsif not Comes_From_Source (Subp)
3729 and then Scope (Subp) /= Standard_Standard
3735 -- The referenced entity must either be the enclosing entity,
3736 -- or an entity declared within the current open scope.
3738 if Present (Scope (Subp))
3739 and then Scope (Subp) /= Current_Scope
3740 and then Subp /= Current_Scope
3743 ("argument of% must be entity in current scope", Assoc);
3747 -- Processing for procedure, operator or function.
3748 -- If subprogram is aliased (as for an instance) indicate
3749 -- that the renamed entity (if declared in the same unit)
3752 if Is_Subprogram (Subp) then
3753 while Present (Alias (Inner_Subp)) loop
3754 Inner_Subp := Alias (Inner_Subp);
3757 if In_Same_Source_Unit (Subp, Inner_Subp) then
3758 Set_Inline_Flags (Inner_Subp);
3760 Decl := Parent (Parent (Inner_Subp));
3762 if Nkind (Decl) = N_Subprogram_Declaration
3763 and then Present (Corresponding_Body (Decl))
3765 Set_Inline_Flags (Corresponding_Body (Decl));
3767 elsif Is_Generic_Instance (Subp) then
3769 -- Indicate that the body needs to be created for
3770 -- inlining subsequent calls. The instantiation
3771 -- node follows the declaration of the wrapper
3772 -- package created for it.
3774 if Scope (Subp) /= Standard_Standard
3776 Need_Subprogram_Instance_Body
3777 (Next (Unit_Declaration_Node (Scope (Alias (Subp)))),
3787 -- For a generic subprogram set flag as well, for use at
3788 -- the point of instantiation, to determine whether the
3789 -- body should be generated.
3791 elsif Is_Generic_Subprogram (Subp) then
3792 Set_Inline_Flags (Subp);
3795 -- Literals are by definition inlined
3797 elsif Kind = E_Enumeration_Literal then
3800 -- Anything else is an error
3804 ("expect subprogram name for pragma%", Assoc);
3808 ----------------------
3809 -- Set_Inline_Flags --
3810 ----------------------
3812 procedure Set_Inline_Flags (Subp : Entity_Id) is
3815 Set_Is_Inlined (Subp, True);
3818 if not Has_Pragma_Inline (Subp) then
3819 Set_Has_Pragma_Inline (Subp);
3823 if Prag_Id = Pragma_Inline_Always then
3824 Set_Has_Pragma_Inline_Always (Subp);
3826 end Set_Inline_Flags;
3828 -- Start of processing for Process_Inline
3831 Check_No_Identifiers;
3832 Check_At_Least_N_Arguments (1);
3835 Inline_Processing_Required := True;
3839 while Present (Assoc) loop
3840 Subp_Id := Expression (Assoc);
3844 if Is_Entity_Name (Subp_Id) then
3845 Subp := Entity (Subp_Id);
3847 if Subp = Any_Id then
3849 -- If previous error, avoid cascaded errors
3857 while Present (Homonym (Subp))
3858 and then Scope (Homonym (Subp)) = Current_Scope
3860 Make_Inline (Homonym (Subp));
3861 Subp := Homonym (Subp);
3868 ("inappropriate argument for pragma%", Assoc);
3871 and then Warn_On_Redundant_Constructs
3872 and then not Suppress_All_Inlining
3874 if Inlining_Not_Possible (Subp) then
3876 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
3879 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
3887 ----------------------------
3888 -- Process_Interface_Name --
3889 ----------------------------
3891 procedure Process_Interface_Name
3892 (Subprogram_Def : Entity_Id;
3898 String_Val : String_Id;
3900 procedure Check_Form_Of_Interface_Name
3902 Ext_Name_Case : Boolean);
3903 -- SN is a string literal node for an interface name. This routine
3904 -- performs some minimal checks that the name is reasonable. In
3905 -- particular that no spaces or other obviously incorrect characters
3906 -- appear. This is only a warning, since any characters are allowed.
3907 -- Ext_Name_Case is True for an External_Name, False for a Link_Name.
3909 ----------------------------------
3910 -- Check_Form_Of_Interface_Name --
3911 ----------------------------------
3913 procedure Check_Form_Of_Interface_Name
3915 Ext_Name_Case : Boolean)
3917 S : constant String_Id := Strval (Expr_Value_S (SN));
3918 SL : constant Nat := String_Length (S);
3923 Error_Msg_N ("interface name cannot be null string", SN);
3926 for J in 1 .. SL loop
3927 C := Get_String_Char (S, J);
3929 -- Look for dubious character and issue unconditional warning.
3930 -- Definitely dubious if not in character range.
3932 if not In_Character_Range (C)
3934 -- For all cases except external names on CLI target,
3935 -- commas, spaces and slashes are dubious (in CLI, we use
3936 -- spaces and commas in external names to specify assembly
3937 -- version and public key).
3939 or else ((not Ext_Name_Case or else VM_Target /= CLI_Target)
3940 and then (Get_Character (C) = ' '
3942 Get_Character (C) = ','
3944 Get_Character (C) = '/'
3946 Get_Character (C) = '\'))
3949 ("?interface name contains illegal character",
3950 Sloc (SN) + Source_Ptr (J));
3953 end Check_Form_Of_Interface_Name;
3955 -- Start of processing for Process_Interface_Name
3958 if No (Link_Arg) then
3959 if No (Ext_Arg) then
3960 if VM_Target = CLI_Target
3961 and then Ekind (Subprogram_Def) = E_Package
3962 and then Nkind (Parent (Subprogram_Def)) =
3963 N_Package_Specification
3964 and then Present (Generic_Parent (Parent (Subprogram_Def)))
3969 (Generic_Parent (Parent (Subprogram_Def))));
3974 elsif Chars (Ext_Arg) = Name_Link_Name then
3976 Link_Nam := Expression (Ext_Arg);
3979 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3980 Ext_Nam := Expression (Ext_Arg);
3985 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3986 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3987 Ext_Nam := Expression (Ext_Arg);
3988 Link_Nam := Expression (Link_Arg);
3991 -- Check expressions for external name and link name are static
3993 if Present (Ext_Nam) then
3994 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3995 Check_Form_Of_Interface_Name (Ext_Nam, Ext_Name_Case => True);
3997 -- Verify that external name is not the name of a local entity,
3998 -- which would hide the imported one and could lead to run-time
3999 -- surprises. The problem can only arise for entities declared in
4000 -- a package body (otherwise the external name is fully qualified
4001 -- and will not conflict).
4009 if Prag_Id = Pragma_Import then
4010 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
4012 E := Entity_Id (Get_Name_Table_Info (Nam));
4014 if Nam /= Chars (Subprogram_Def)
4015 and then Present (E)
4016 and then not Is_Overloadable (E)
4017 and then Is_Immediately_Visible (E)
4018 and then not Is_Imported (E)
4019 and then Ekind (Scope (E)) = E_Package
4022 while Present (Par) loop
4023 if Nkind (Par) = N_Package_Body then
4024 Error_Msg_Sloc := Sloc (E);
4026 ("imported entity is hidden by & declared#",
4031 Par := Parent (Par);
4038 if Present (Link_Nam) then
4039 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
4040 Check_Form_Of_Interface_Name (Link_Nam, Ext_Name_Case => False);
4043 -- If there is no link name, just set the external name
4045 if No (Link_Nam) then
4046 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
4048 -- For the Link_Name case, the given literal is preceded by an
4049 -- asterisk, which indicates to GCC that the given name should
4050 -- be taken literally, and in particular that no prepending of
4051 -- underlines should occur, even in systems where this is the
4057 if VM_Target = No_VM then
4058 Store_String_Char (Get_Char_Code ('*'));
4061 String_Val := Strval (Expr_Value_S (Link_Nam));
4062 Store_String_Chars (String_Val);
4064 Make_String_Literal (Sloc (Link_Nam),
4065 Strval => End_String);
4068 Set_Encoded_Interface_Name
4069 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
4070 Check_Duplicated_Export_Name (Link_Nam);
4071 end Process_Interface_Name;
4073 -----------------------------------------
4074 -- Process_Interrupt_Or_Attach_Handler --
4075 -----------------------------------------
4077 procedure Process_Interrupt_Or_Attach_Handler is
4078 Arg1_X : constant Node_Id := Expression (Arg1);
4079 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
4080 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
4083 Set_Is_Interrupt_Handler (Handler_Proc);
4085 -- If the pragma is not associated with a handler procedure
4086 -- within a protected type, then it must be for a nonprotected
4087 -- procedure for the AAMP target, in which case we don't
4088 -- associate a representation item with the procedure's scope.
4090 if Ekind (Proc_Scope) = E_Protected_Type then
4091 if Prag_Id = Pragma_Interrupt_Handler
4093 Prag_Id = Pragma_Attach_Handler
4095 Record_Rep_Item (Proc_Scope, N);
4098 end Process_Interrupt_Or_Attach_Handler;
4100 --------------------------------------------------
4101 -- Process_Restrictions_Or_Restriction_Warnings --
4102 --------------------------------------------------
4104 -- Note: some of the simple identifier cases were handled in par-prag,
4105 -- but it is harmless (and more straightforward) to simply handle all
4106 -- cases here, even if it means we repeat a bit of work in some cases.
4108 procedure Process_Restrictions_Or_Restriction_Warnings
4112 R_Id : Restriction_Id;
4117 procedure Check_Unit_Name (N : Node_Id);
4118 -- Checks unit name parameter for No_Dependence. Returns if it has
4119 -- an appropriate form, otherwise raises pragma argument error.
4121 ---------------------
4122 -- Check_Unit_Name --
4123 ---------------------
4125 procedure Check_Unit_Name (N : Node_Id) is
4127 if Nkind (N) = N_Selected_Component then
4128 Check_Unit_Name (Prefix (N));
4129 Check_Unit_Name (Selector_Name (N));
4131 elsif Nkind (N) = N_Identifier then
4136 ("wrong form for unit name for No_Dependence", N);
4138 end Check_Unit_Name;
4140 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
4143 Check_Ada_83_Warning;
4144 Check_At_Least_N_Arguments (1);
4145 Check_Valid_Configuration_Pragma;
4148 while Present (Arg) loop
4150 Expr := Expression (Arg);
4152 -- Case of no restriction identifier present
4154 if Id = No_Name then
4155 if Nkind (Expr) /= N_Identifier then
4157 ("invalid form for restriction", Arg);
4162 (Process_Restriction_Synonyms (Expr));
4164 if R_Id not in All_Boolean_Restrictions then
4165 Error_Msg_Name_1 := Pname;
4167 ("invalid restriction identifier&", Get_Pragma_Arg (Arg));
4169 -- Check for possible misspelling
4171 for J in Restriction_Id loop
4173 Rnm : constant String := Restriction_Id'Image (J);
4176 Name_Buffer (1 .. Rnm'Length) := Rnm;
4177 Name_Len := Rnm'Length;
4178 Set_Casing (All_Lower_Case);
4180 if Is_Bad_Spelling_Of (Chars (Expr), Name_Enter) then
4182 (Identifier_Casing (Current_Source_File));
4183 Error_Msg_String (1 .. Rnm'Length) :=
4184 Name_Buffer (1 .. Name_Len);
4185 Error_Msg_Strlen := Rnm'Length;
4187 ("\possible misspelling of ""~""",
4188 Get_Pragma_Arg (Arg));
4197 if Implementation_Restriction (R_Id) then
4198 Check_Restriction (No_Implementation_Restrictions, Arg);
4201 -- If this is a warning, then set the warning unless we already
4202 -- have a real restriction active (we never want a warning to
4203 -- override a real restriction).
4206 if not Restriction_Active (R_Id) then
4207 Set_Restriction (R_Id, N);
4208 Restriction_Warnings (R_Id) := True;
4211 -- If real restriction case, then set it and make sure that the
4212 -- restriction warning flag is off, since a real restriction
4213 -- always overrides a warning.
4216 Set_Restriction (R_Id, N);
4217 Restriction_Warnings (R_Id) := False;
4220 -- A very special case that must be processed here: pragma
4221 -- Restrictions (No_Exceptions) turns off all run-time
4222 -- checking. This is a bit dubious in terms of the formal
4223 -- language definition, but it is what is intended by RM
4224 -- H.4(12). Restriction_Warnings never affects generated code
4225 -- so this is done only in the real restriction case.
4227 if R_Id = No_Exceptions and then not Warn then
4228 Scope_Suppress := (others => True);
4231 -- Case of No_Dependence => unit-name. Note that the parser
4232 -- already made the necessary entry in the No_Dependence table.
4234 elsif Id = Name_No_Dependence then
4235 Check_Unit_Name (Expr);
4237 -- All other cases of restriction identifier present
4240 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
4241 Analyze_And_Resolve (Expr, Any_Integer);
4243 if R_Id not in All_Parameter_Restrictions then
4245 ("invalid restriction parameter identifier", Arg);
4247 elsif not Is_OK_Static_Expression (Expr) then
4248 Flag_Non_Static_Expr
4249 ("value must be static expression!", Expr);
4252 elsif not Is_Integer_Type (Etype (Expr))
4253 or else Expr_Value (Expr) < 0
4256 ("value must be non-negative integer", Arg);
4259 -- Restriction pragma is active
4261 Val := Expr_Value (Expr);
4263 if not UI_Is_In_Int_Range (Val) then
4265 ("pragma ignored, value too large?", Arg);
4268 -- Warning case. If the real restriction is active, then we
4269 -- ignore the request, since warning never overrides a real
4270 -- restriction. Otherwise we set the proper warning. Note that
4271 -- this circuit sets the warning again if it is already set,
4272 -- which is what we want, since the constant may have changed.
4275 if not Restriction_Active (R_Id) then
4277 (R_Id, N, Integer (UI_To_Int (Val)));
4278 Restriction_Warnings (R_Id) := True;
4281 -- Real restriction case, set restriction and make sure warning
4282 -- flag is off since real restriction always overrides warning.
4285 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
4286 Restriction_Warnings (R_Id) := False;
4292 end Process_Restrictions_Or_Restriction_Warnings;
4294 ---------------------------------
4295 -- Process_Suppress_Unsuppress --
4296 ---------------------------------
4298 -- Note: this procedure makes entries in the check suppress data
4299 -- structures managed by Sem. See spec of package Sem for full
4300 -- details on how we handle recording of check suppression.
4302 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
4307 In_Package_Spec : constant Boolean :=
4308 Is_Package_Or_Generic_Package (Current_Scope)
4309 and then not In_Package_Body (Current_Scope);
4311 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
4312 -- Used to suppress a single check on the given entity
4314 --------------------------------
4315 -- Suppress_Unsuppress_Echeck --
4316 --------------------------------
4318 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
4320 Set_Checks_May_Be_Suppressed (E);
4322 if In_Package_Spec then
4323 Push_Global_Suppress_Stack_Entry
4326 Suppress => Suppress_Case);
4329 Push_Local_Suppress_Stack_Entry
4332 Suppress => Suppress_Case);
4335 -- If this is a first subtype, and the base type is distinct,
4336 -- then also set the suppress flags on the base type.
4338 if Is_First_Subtype (E)
4339 and then Etype (E) /= E
4341 Suppress_Unsuppress_Echeck (Etype (E), C);
4343 end Suppress_Unsuppress_Echeck;
4345 -- Start of processing for Process_Suppress_Unsuppress
4348 -- Suppress/Unsuppress can appear as a configuration pragma,
4349 -- or in a declarative part or a package spec (RM 11.5(5))
4351 if not Is_Configuration_Pragma then
4352 Check_Is_In_Decl_Part_Or_Package_Spec;
4355 Check_At_Least_N_Arguments (1);
4356 Check_At_Most_N_Arguments (2);
4357 Check_No_Identifier (Arg1);
4358 Check_Arg_Is_Identifier (Arg1);
4360 C := Get_Check_Id (Chars (Expression (Arg1)));
4362 if C = No_Check_Id then
4364 ("argument of pragma% is not valid check name", Arg1);
4367 if not Suppress_Case
4368 and then (C = All_Checks or else C = Overflow_Check)
4370 Opt.Overflow_Checks_Unsuppressed := True;
4373 if Arg_Count = 1 then
4375 -- Make an entry in the local scope suppress table. This is the
4376 -- table that directly shows the current value of the scope
4377 -- suppress check for any check id value.
4379 if C = All_Checks then
4381 -- For All_Checks, we set all specific predefined checks with
4382 -- the exception of Elaboration_Check, which is handled
4383 -- specially because of not wanting All_Checks to have the
4384 -- effect of deactivating static elaboration order processing.
4386 for J in Scope_Suppress'Range loop
4387 if J /= Elaboration_Check then
4388 Scope_Suppress (J) := Suppress_Case;
4392 -- If not All_Checks, and predefined check, then set appropriate
4393 -- scope entry. Note that we will set Elaboration_Check if this
4394 -- is explicitly specified.
4396 elsif C in Predefined_Check_Id then
4397 Scope_Suppress (C) := Suppress_Case;
4400 -- Also make an entry in the Local_Entity_Suppress table
4402 Push_Local_Suppress_Stack_Entry
4405 Suppress => Suppress_Case);
4407 -- Case of two arguments present, where the check is suppressed for
4408 -- a specified entity (given as the second argument of the pragma)
4411 Check_Optional_Identifier (Arg2, Name_On);
4412 E_Id := Expression (Arg2);
4415 if not Is_Entity_Name (E_Id) then
4417 ("second argument of pragma% must be entity name", Arg2);
4426 -- Enforce RM 11.5(7) which requires that for a pragma that
4427 -- appears within a package spec, the named entity must be
4428 -- within the package spec. We allow the package name itself
4429 -- to be mentioned since that makes sense, although it is not
4430 -- strictly allowed by 11.5(7).
4433 and then E /= Current_Scope
4434 and then Scope (E) /= Current_Scope
4437 ("entity in pragma% is not in package spec (RM 11.5(7))",
4441 -- Loop through homonyms. As noted below, in the case of a package
4442 -- spec, only homonyms within the package spec are considered.
4445 Suppress_Unsuppress_Echeck (E, C);
4447 if Is_Generic_Instance (E)
4448 and then Is_Subprogram (E)
4449 and then Present (Alias (E))
4451 Suppress_Unsuppress_Echeck (Alias (E), C);
4454 -- Move to next homonym
4459 -- If we are within a package specification, the
4460 -- pragma only applies to homonyms in the same scope.
4462 exit when In_Package_Spec
4463 and then Scope (E) /= Current_Scope;
4466 end Process_Suppress_Unsuppress;
4472 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
4474 if Is_Imported (E) then
4476 ("cannot export entity& that was previously imported", Arg);
4478 elsif Present (Address_Clause (E)) then
4480 ("cannot export entity& that has an address clause", Arg);
4483 Set_Is_Exported (E);
4485 -- Generate a reference for entity explicitly, because the
4486 -- identifier may be overloaded and name resolution will not
4489 Generate_Reference (E, Arg);
4491 -- Deal with exporting non-library level entity
4493 if not Is_Library_Level_Entity (E) then
4495 -- Not allowed at all for subprograms
4497 if Is_Subprogram (E) then
4498 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
4500 -- Otherwise set public and statically allocated
4504 Set_Is_Statically_Allocated (E);
4506 -- Warn if the corresponding W flag is set and the pragma
4507 -- comes from source. The latter may not be true e.g. on
4508 -- VMS where we expand export pragmas for exception codes
4509 -- associated with imported or exported exceptions. We do
4510 -- not want to generate a warning for something that the
4511 -- user did not write.
4513 if Warn_On_Export_Import
4514 and then Comes_From_Source (Arg)
4517 ("?& has been made static as a result of Export", Arg, E);
4519 ("\this usage is non-standard and non-portable", Arg);
4524 if Warn_On_Export_Import and then Is_Type (E) then
4526 ("exporting a type has no effect?", Arg, E);
4529 if Warn_On_Export_Import and Inside_A_Generic then
4531 ("all instances of& will have the same external name?", Arg, E);
4535 ----------------------------------------------
4536 -- Set_Extended_Import_Export_External_Name --
4537 ----------------------------------------------
4539 procedure Set_Extended_Import_Export_External_Name
4540 (Internal_Ent : Entity_Id;
4541 Arg_External : Node_Id)
4543 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
4547 if No (Arg_External) then
4551 Check_Arg_Is_External_Name (Arg_External);
4553 if Nkind (Arg_External) = N_String_Literal then
4554 if String_Length (Strval (Arg_External)) = 0 then
4557 New_Name := Adjust_External_Name_Case (Arg_External);
4560 elsif Nkind (Arg_External) = N_Identifier then
4561 New_Name := Get_Default_External_Name (Arg_External);
4563 -- Check_Arg_Is_External_Name should let through only
4564 -- identifiers and string literals or static string
4565 -- expressions (which are folded to string literals).
4568 raise Program_Error;
4571 -- If we already have an external name set (by a prior normal
4572 -- Import or Export pragma), then the external names must match
4574 if Present (Interface_Name (Internal_Ent)) then
4575 Check_Matching_Internal_Names : declare
4576 S1 : constant String_Id := Strval (Old_Name);
4577 S2 : constant String_Id := Strval (New_Name);
4580 -- Called if names do not match
4586 procedure Mismatch is
4588 Error_Msg_Sloc := Sloc (Old_Name);
4590 ("external name does not match that given #",
4594 -- Start of processing for Check_Matching_Internal_Names
4597 if String_Length (S1) /= String_Length (S2) then
4601 for J in 1 .. String_Length (S1) loop
4602 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
4607 end Check_Matching_Internal_Names;
4609 -- Otherwise set the given name
4612 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
4613 Check_Duplicated_Export_Name (New_Name);
4615 end Set_Extended_Import_Export_External_Name;
4621 procedure Set_Imported (E : Entity_Id) is
4623 -- Error message if already imported or exported
4625 if Is_Exported (E) or else Is_Imported (E) then
4626 if Is_Exported (E) then
4627 Error_Msg_NE ("entity& was previously exported", N, E);
4629 Error_Msg_NE ("entity& was previously imported", N, E);
4632 Error_Msg_Name_1 := Pname;
4634 ("\(pragma% applies to all previous entities)", N);
4636 Error_Msg_Sloc := Sloc (E);
4637 Error_Msg_NE ("\import not allowed for& declared#", N, E);
4639 -- Here if not previously imported or exported, OK to import
4642 Set_Is_Imported (E);
4644 -- If the entity is an object that is not at the library
4645 -- level, then it is statically allocated. We do not worry
4646 -- about objects with address clauses in this context since
4647 -- they are not really imported in the linker sense.
4650 and then not Is_Library_Level_Entity (E)
4651 and then No (Address_Clause (E))
4653 Set_Is_Statically_Allocated (E);
4658 -------------------------
4659 -- Set_Mechanism_Value --
4660 -------------------------
4662 -- Note: the mechanism name has not been analyzed (and cannot indeed
4663 -- be analyzed, since it is semantic nonsense), so we get it in the
4664 -- exact form created by the parser.
4666 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
4669 Mech_Name_Id : Name_Id;
4671 procedure Bad_Class;
4672 -- Signal bad descriptor class name
4674 procedure Bad_Mechanism;
4675 -- Signal bad mechanism name
4681 procedure Bad_Class is
4683 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
4686 -------------------------
4687 -- Bad_Mechanism_Value --
4688 -------------------------
4690 procedure Bad_Mechanism is
4692 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
4695 -- Start of processing for Set_Mechanism_Value
4698 if Mechanism (Ent) /= Default_Mechanism then
4700 ("mechanism for & has already been set", Mech_Name, Ent);
4703 -- MECHANISM_NAME ::= value | reference | descriptor |
4706 if Nkind (Mech_Name) = N_Identifier then
4707 if Chars (Mech_Name) = Name_Value then
4708 Set_Mechanism (Ent, By_Copy);
4711 elsif Chars (Mech_Name) = Name_Reference then
4712 Set_Mechanism (Ent, By_Reference);
4715 elsif Chars (Mech_Name) = Name_Descriptor then
4716 Check_VMS (Mech_Name);
4717 Set_Mechanism (Ent, By_Descriptor);
4720 elsif Chars (Mech_Name) = Name_Short_Descriptor then
4721 Check_VMS (Mech_Name);
4722 Set_Mechanism (Ent, By_Short_Descriptor);
4725 elsif Chars (Mech_Name) = Name_Copy then
4727 ("bad mechanism name, Value assumed", Mech_Name);
4733 -- MECHANISM_NAME ::= descriptor (CLASS_NAME) |
4734 -- short_descriptor (CLASS_NAME)
4735 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4737 -- Note: this form is parsed as an indexed component
4739 elsif Nkind (Mech_Name) = N_Indexed_Component then
4741 Class := First (Expressions (Mech_Name));
4743 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4744 or else not (Chars (Prefix (Mech_Name)) = Name_Descriptor or else
4745 Chars (Prefix (Mech_Name)) = Name_Short_Descriptor)
4746 or else Present (Next (Class))
4750 Mech_Name_Id := Chars (Prefix (Mech_Name));
4753 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME) |
4754 -- short_descriptor (Class => CLASS_NAME)
4755 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4757 -- Note: this form is parsed as a function call
4759 elsif Nkind (Mech_Name) = N_Function_Call then
4761 Param := First (Parameter_Associations (Mech_Name));
4763 if Nkind (Name (Mech_Name)) /= N_Identifier
4764 or else not (Chars (Name (Mech_Name)) = Name_Descriptor or else
4765 Chars (Name (Mech_Name)) = Name_Short_Descriptor)
4766 or else Present (Next (Param))
4767 or else No (Selector_Name (Param))
4768 or else Chars (Selector_Name (Param)) /= Name_Class
4772 Class := Explicit_Actual_Parameter (Param);
4773 Mech_Name_Id := Chars (Name (Mech_Name));
4780 -- Fall through here with Class set to descriptor class name
4782 Check_VMS (Mech_Name);
4784 if Nkind (Class) /= N_Identifier then
4787 elsif Mech_Name_Id = Name_Descriptor
4788 and then Chars (Class) = Name_UBS
4790 Set_Mechanism (Ent, By_Descriptor_UBS);
4792 elsif Mech_Name_Id = Name_Descriptor
4793 and then Chars (Class) = Name_UBSB
4795 Set_Mechanism (Ent, By_Descriptor_UBSB);
4797 elsif Mech_Name_Id = Name_Descriptor
4798 and then Chars (Class) = Name_UBA
4800 Set_Mechanism (Ent, By_Descriptor_UBA);
4802 elsif Mech_Name_Id = Name_Descriptor
4803 and then Chars (Class) = Name_S
4805 Set_Mechanism (Ent, By_Descriptor_S);
4807 elsif Mech_Name_Id = Name_Descriptor
4808 and then Chars (Class) = Name_SB
4810 Set_Mechanism (Ent, By_Descriptor_SB);
4812 elsif Mech_Name_Id = Name_Descriptor
4813 and then Chars (Class) = Name_A
4815 Set_Mechanism (Ent, By_Descriptor_A);
4817 elsif Mech_Name_Id = Name_Descriptor
4818 and then Chars (Class) = Name_NCA
4820 Set_Mechanism (Ent, By_Descriptor_NCA);
4822 elsif Mech_Name_Id = Name_Short_Descriptor
4823 and then Chars (Class) = Name_UBS
4825 Set_Mechanism (Ent, By_Short_Descriptor_UBS);
4827 elsif Mech_Name_Id = Name_Short_Descriptor
4828 and then Chars (Class) = Name_UBSB
4830 Set_Mechanism (Ent, By_Short_Descriptor_UBSB);
4832 elsif Mech_Name_Id = Name_Short_Descriptor
4833 and then Chars (Class) = Name_UBA
4835 Set_Mechanism (Ent, By_Short_Descriptor_UBA);
4837 elsif Mech_Name_Id = Name_Short_Descriptor
4838 and then Chars (Class) = Name_S
4840 Set_Mechanism (Ent, By_Short_Descriptor_S);
4842 elsif Mech_Name_Id = Name_Short_Descriptor
4843 and then Chars (Class) = Name_SB
4845 Set_Mechanism (Ent, By_Short_Descriptor_SB);
4847 elsif Mech_Name_Id = Name_Short_Descriptor
4848 and then Chars (Class) = Name_A
4850 Set_Mechanism (Ent, By_Short_Descriptor_A);
4852 elsif Mech_Name_Id = Name_Short_Descriptor
4853 and then Chars (Class) = Name_NCA
4855 Set_Mechanism (Ent, By_Short_Descriptor_NCA);
4860 end Set_Mechanism_Value;
4862 ---------------------------
4863 -- Set_Ravenscar_Profile --
4864 ---------------------------
4866 -- The tasks to be done here are
4868 -- Set required policies
4870 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4871 -- pragma Locking_Policy (Ceiling_Locking)
4873 -- Set Detect_Blocking mode
4875 -- Set required restrictions (see System.Rident for detailed list)
4877 procedure Set_Ravenscar_Profile (N : Node_Id) is
4879 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4881 if Task_Dispatching_Policy /= ' '
4882 and then Task_Dispatching_Policy /= 'F'
4884 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
4885 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4887 -- Set the FIFO_Within_Priorities policy, but always preserve
4888 -- System_Location since we like the error message with the run time
4892 Task_Dispatching_Policy := 'F';
4894 if Task_Dispatching_Policy_Sloc /= System_Location then
4895 Task_Dispatching_Policy_Sloc := Loc;
4899 -- pragma Locking_Policy (Ceiling_Locking)
4901 if Locking_Policy /= ' '
4902 and then Locking_Policy /= 'C'
4904 Error_Msg_Sloc := Locking_Policy_Sloc;
4905 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4907 -- Set the Ceiling_Locking policy, but preserve System_Location since
4908 -- we like the error message with the run time name.
4911 Locking_Policy := 'C';
4913 if Locking_Policy_Sloc /= System_Location then
4914 Locking_Policy_Sloc := Loc;
4918 -- pragma Detect_Blocking
4920 Detect_Blocking := True;
4922 -- Set the corresponding restrictions
4924 Set_Profile_Restrictions
4925 (Ravenscar, N, Warn => Treat_Restrictions_As_Warnings);
4926 end Set_Ravenscar_Profile;
4928 -- Start of processing for Analyze_Pragma
4931 -- Deal with unrecognized pragma
4933 if not Is_Pragma_Name (Pname) then
4934 if Warn_On_Unrecognized_Pragma then
4935 Error_Msg_Name_1 := Pname;
4936 Error_Msg_N ("?unrecognized pragma%!", Pragma_Identifier (N));
4938 for PN in First_Pragma_Name .. Last_Pragma_Name loop
4939 if Is_Bad_Spelling_Of (Pname, PN) then
4940 Error_Msg_Name_1 := PN;
4942 ("\?possible misspelling of %!", Pragma_Identifier (N));
4951 -- Here to start processing for recognized pragma
4953 Prag_Id := Get_Pragma_Id (Pname);
4962 if Present (Pragma_Argument_Associations (N)) then
4963 Arg1 := First (Pragma_Argument_Associations (N));
4965 if Present (Arg1) then
4966 Arg2 := Next (Arg1);
4968 if Present (Arg2) then
4969 Arg3 := Next (Arg2);
4971 if Present (Arg3) then
4972 Arg4 := Next (Arg3);
4978 -- Count number of arguments
4985 while Present (Arg_Node) loop
4986 Arg_Count := Arg_Count + 1;
4991 -- An enumeration type defines the pragmas that are supported by the
4992 -- implementation. Get_Pragma_Id (in package Prag) transforms a name
4993 -- into the corresponding enumeration value for the following case.
5001 -- pragma Abort_Defer;
5003 when Pragma_Abort_Defer =>
5005 Check_Arg_Count (0);
5007 -- The only required semantic processing is to check the
5008 -- placement. This pragma must appear at the start of the
5009 -- statement sequence of a handled sequence of statements.
5011 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
5012 or else N /= First (Statements (Parent (N)))
5023 -- Note: this pragma also has some specific processing in Par.Prag
5024 -- because we want to set the Ada version mode during parsing.
5026 when Pragma_Ada_83 =>
5028 Check_Arg_Count (0);
5030 -- We really should check unconditionally for proper configuration
5031 -- pragma placement, since we really don't want mixed Ada modes
5032 -- within a single unit, and the GNAT reference manual has always
5033 -- said this was a configuration pragma, but we did not check and
5034 -- are hesitant to add the check now.
5036 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
5037 -- or Ada 95, so we must check if we are in Ada 2005 mode.
5039 if Ada_Version >= Ada_05 then
5040 Check_Valid_Configuration_Pragma;
5043 -- Now set Ada 83 mode
5045 Ada_Version := Ada_83;
5046 Ada_Version_Explicit := Ada_Version;
5054 -- Note: this pragma also has some specific processing in Par.Prag
5055 -- because we want to set the Ada 83 version mode during parsing.
5057 when Pragma_Ada_95 =>
5059 Check_Arg_Count (0);
5061 -- We really should check unconditionally for proper configuration
5062 -- pragma placement, since we really don't want mixed Ada modes
5063 -- within a single unit, and the GNAT reference manual has always
5064 -- said this was a configuration pragma, but we did not check and
5065 -- are hesitant to add the check now.
5067 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
5068 -- or Ada 95, so we must check if we are in Ada 2005 mode.
5070 if Ada_Version >= Ada_05 then
5071 Check_Valid_Configuration_Pragma;
5074 -- Now set Ada 95 mode
5076 Ada_Version := Ada_95;
5077 Ada_Version_Explicit := Ada_Version;
5079 ---------------------
5080 -- Ada_05/Ada_2005 --
5081 ---------------------
5084 -- pragma Ada_05 (LOCAL_NAME);
5087 -- pragma Ada_2005 (LOCAL_NAME):
5089 -- Note: these pragma also have some specific processing in Par.Prag
5090 -- because we want to set the Ada 2005 version mode during parsing.
5092 when Pragma_Ada_05 | Pragma_Ada_2005 => declare
5098 if Arg_Count = 1 then
5099 Check_Arg_Is_Local_Name (Arg1);
5100 E_Id := Expression (Arg1);
5102 if Etype (E_Id) = Any_Type then
5106 Set_Is_Ada_2005_Only (Entity (E_Id));
5109 Check_Arg_Count (0);
5111 -- For Ada_2005 we unconditionally enforce the documented
5112 -- configuration pragma placement, since we do not want to
5113 -- tolerate mixed modes in a unit involving Ada 2005. That
5114 -- would cause real difficulties for those cases where there
5115 -- are incompatibilities between Ada 95 and Ada 2005.
5117 Check_Valid_Configuration_Pragma;
5119 -- Now set Ada 2005 mode
5121 Ada_Version := Ada_05;
5122 Ada_Version_Explicit := Ada_05;
5126 ----------------------
5127 -- All_Calls_Remote --
5128 ----------------------
5130 -- pragma All_Calls_Remote [(library_package_NAME)];
5132 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
5133 Lib_Entity : Entity_Id;
5136 Check_Ada_83_Warning;
5137 Check_Valid_Library_Unit_Pragma;
5139 if Nkind (N) = N_Null_Statement then
5143 Lib_Entity := Find_Lib_Unit_Name;
5145 -- This pragma should only apply to a RCI unit (RM E.2.3(23))
5147 if Present (Lib_Entity)
5148 and then not Debug_Flag_U
5150 if not Is_Remote_Call_Interface (Lib_Entity) then
5151 Error_Pragma ("pragma% only apply to rci unit");
5153 -- Set flag for entity of the library unit
5156 Set_Has_All_Calls_Remote (Lib_Entity);
5160 end All_Calls_Remote;
5166 -- pragma Annotate (IDENTIFIER {, ARG});
5167 -- ARG ::= NAME | EXPRESSION
5169 when Pragma_Annotate => Annotate : begin
5171 Check_At_Least_N_Arguments (1);
5172 Check_Arg_Is_Identifier (Arg1);
5180 while Present (Arg) loop
5181 Exp := Expression (Arg);
5184 if Is_Entity_Name (Exp) then
5187 elsif Nkind (Exp) = N_String_Literal then
5188 Resolve (Exp, Standard_String);
5190 elsif Is_Overloaded (Exp) then
5191 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
5206 -- pragma Assert ([Check =>] Boolean_EXPRESSION
5207 -- [, [Message =>] Static_String_EXPRESSION]);
5209 when Pragma_Assert => Assert : declare
5215 Check_At_Least_N_Arguments (1);
5216 Check_At_Most_N_Arguments (2);
5217 Check_Arg_Order ((Name_Check, Name_Message));
5218 Check_Optional_Identifier (Arg1, Name_Check);
5220 -- We treat pragma Assert as equivalent to:
5222 -- pragma Check (Assertion, condition [, msg]);
5224 -- So rewrite pragma in this manner, and analyze the result
5226 Expr := Get_Pragma_Arg (Arg1);
5228 Make_Pragma_Argument_Association (Loc,
5230 Make_Identifier (Loc,
5231 Chars => Name_Assertion)),
5233 Make_Pragma_Argument_Association (Sloc (Expr),
5234 Expression => Expr));
5236 if Arg_Count > 1 then
5237 Check_Optional_Identifier (Arg2, Name_Message);
5238 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
5239 Append_To (Newa, Relocate_Node (Arg2));
5244 Chars => Name_Check,
5245 Pragma_Argument_Associations => Newa));
5249 ----------------------
5250 -- Assertion_Policy --
5251 ----------------------
5253 -- pragma Assertion_Policy (Check | Ignore)
5255 when Pragma_Assertion_Policy => Assertion_Policy : declare
5260 Check_Valid_Configuration_Pragma;
5261 Check_Arg_Count (1);
5262 Check_No_Identifiers;
5263 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
5265 -- We treat pragma Assertion_Policy as equivalent to:
5267 -- pragma Check_Policy (Assertion, policy)
5269 -- So rewrite the pragma in that manner and link on to the chain
5270 -- of Check_Policy pragmas, marking the pragma as analyzed.
5272 Policy := Get_Pragma_Arg (Arg1);
5276 Chars => Name_Check_Policy,
5278 Pragma_Argument_Associations => New_List (
5279 Make_Pragma_Argument_Association (Loc,
5281 Make_Identifier (Loc,
5282 Chars => Name_Assertion)),
5284 Make_Pragma_Argument_Association (Loc,
5286 Make_Identifier (Sloc (Policy),
5287 Chars => Chars (Policy))))));
5290 Set_Next_Pragma (N, Opt.Check_Policy_List);
5291 Opt.Check_Policy_List := N;
5292 end Assertion_Policy;
5294 ------------------------------
5295 -- Assume_No_Invalid_Values --
5296 ------------------------------
5298 -- pragma Assume_No_Invalid_Values (On | Off);
5300 when Pragma_Assume_No_Invalid_Values =>
5302 Check_Valid_Configuration_Pragma;
5303 Check_Arg_Count (1);
5304 Check_No_Identifiers;
5305 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5307 if Chars (Expression (Arg1)) = Name_On then
5308 Assume_No_Invalid_Values := True;
5310 Assume_No_Invalid_Values := False;
5317 -- pragma AST_Entry (entry_IDENTIFIER);
5319 when Pragma_AST_Entry => AST_Entry : declare
5325 Check_Arg_Count (1);
5326 Check_No_Identifiers;
5327 Check_Arg_Is_Local_Name (Arg1);
5328 Ent := Entity (Expression (Arg1));
5330 -- Note: the implementation of the AST_Entry pragma could handle
5331 -- the entry family case fine, but for now we are consistent with
5332 -- the DEC rules, and do not allow the pragma, which of course
5333 -- has the effect of also forbidding the attribute.
5335 if Ekind (Ent) /= E_Entry then
5337 ("pragma% argument must be simple entry name", Arg1);
5339 elsif Is_AST_Entry (Ent) then
5341 ("duplicate % pragma for entry", Arg1);
5343 elsif Has_Homonym (Ent) then
5345 ("pragma% argument cannot specify overloaded entry", Arg1);
5349 FF : constant Entity_Id := First_Formal (Ent);
5352 if Present (FF) then
5353 if Present (Next_Formal (FF)) then
5355 ("entry for pragma% can have only one argument",
5358 elsif Parameter_Mode (FF) /= E_In_Parameter then
5360 ("entry parameter for pragma% must have mode IN",
5366 Set_Is_AST_Entry (Ent);
5374 -- pragma Asynchronous (LOCAL_NAME);
5376 when Pragma_Asynchronous => Asynchronous : declare
5384 procedure Process_Async_Pragma;
5385 -- Common processing for procedure and access-to-procedure case
5387 --------------------------
5388 -- Process_Async_Pragma --
5389 --------------------------
5391 procedure Process_Async_Pragma is
5394 Set_Is_Asynchronous (Nm);
5398 -- The formals should be of mode IN (RM E.4.1(6))
5401 while Present (S) loop
5402 Formal := Defining_Identifier (S);
5404 if Nkind (Formal) = N_Defining_Identifier
5405 and then Ekind (Formal) /= E_In_Parameter
5408 ("pragma% procedure can only have IN parameter",
5415 Set_Is_Asynchronous (Nm);
5416 end Process_Async_Pragma;
5418 -- Start of processing for pragma Asynchronous
5421 Check_Ada_83_Warning;
5422 Check_No_Identifiers;
5423 Check_Arg_Count (1);
5424 Check_Arg_Is_Local_Name (Arg1);
5426 if Debug_Flag_U then
5430 C_Ent := Cunit_Entity (Current_Sem_Unit);
5431 Analyze (Expression (Arg1));
5432 Nm := Entity (Expression (Arg1));
5434 if not Is_Remote_Call_Interface (C_Ent)
5435 and then not Is_Remote_Types (C_Ent)
5437 -- This pragma should only appear in an RCI or Remote Types
5438 -- unit (RM E.4.1(4))
5441 ("pragma% not in Remote_Call_Interface or " &
5442 "Remote_Types unit");
5445 if Ekind (Nm) = E_Procedure
5446 and then Nkind (Parent (Nm)) = N_Procedure_Specification
5448 if not Is_Remote_Call_Interface (Nm) then
5450 ("pragma% cannot be applied on non-remote procedure",
5454 L := Parameter_Specifications (Parent (Nm));
5455 Process_Async_Pragma;
5458 elsif Ekind (Nm) = E_Function then
5460 ("pragma% cannot be applied to function", Arg1);
5462 elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
5464 if Is_Record_Type (Nm) then
5465 -- A record type that is the Equivalent_Type for
5466 -- a remote access-to-subprogram type.
5468 N := Declaration_Node (Corresponding_Remote_Type (Nm));
5471 -- A non-expanded RAS type (case where distribution is
5474 N := Declaration_Node (Nm);
5477 if Nkind (N) = N_Full_Type_Declaration
5478 and then Nkind (Type_Definition (N)) =
5479 N_Access_Procedure_Definition
5481 L := Parameter_Specifications (Type_Definition (N));
5482 Process_Async_Pragma;
5484 if Is_Asynchronous (Nm)
5485 and then Expander_Active
5486 and then Get_PCS_Name /= Name_No_DSA
5488 RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
5493 ("pragma% cannot reference access-to-function type",
5497 -- Only other possibility is Access-to-class-wide type
5499 elsif Is_Access_Type (Nm)
5500 and then Is_Class_Wide_Type (Designated_Type (Nm))
5502 Check_First_Subtype (Arg1);
5503 Set_Is_Asynchronous (Nm);
5504 if Expander_Active then
5505 RACW_Type_Is_Asynchronous (Nm);
5509 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
5517 -- pragma Atomic (LOCAL_NAME);
5519 when Pragma_Atomic =>
5520 Process_Atomic_Shared_Volatile;
5522 -----------------------
5523 -- Atomic_Components --
5524 -----------------------
5526 -- pragma Atomic_Components (array_LOCAL_NAME);
5528 -- This processing is shared by Volatile_Components
5530 when Pragma_Atomic_Components |
5531 Pragma_Volatile_Components =>
5533 Atomic_Components : declare
5540 Check_Ada_83_Warning;
5541 Check_No_Identifiers;
5542 Check_Arg_Count (1);
5543 Check_Arg_Is_Local_Name (Arg1);
5544 E_Id := Expression (Arg1);
5546 if Etype (E_Id) = Any_Type then
5552 if Rep_Item_Too_Early (E, N)
5554 Rep_Item_Too_Late (E, N)
5559 D := Declaration_Node (E);
5562 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
5564 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
5565 and then Nkind (D) = N_Object_Declaration
5566 and then Nkind (Object_Definition (D)) =
5567 N_Constrained_Array_Definition)
5569 -- The flag is set on the object, or on the base type
5571 if Nkind (D) /= N_Object_Declaration then
5575 Set_Has_Volatile_Components (E);
5577 if Prag_Id = Pragma_Atomic_Components then
5578 Set_Has_Atomic_Components (E);
5580 if Is_Packed (E) then
5581 Set_Is_Packed (E, False);
5584 ("?Pack canceled, cannot pack atomic components",
5590 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
5592 end Atomic_Components;
5594 --------------------
5595 -- Attach_Handler --
5596 --------------------
5598 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
5600 when Pragma_Attach_Handler =>
5601 Check_Ada_83_Warning;
5602 Check_No_Identifiers;
5603 Check_Arg_Count (2);
5605 if No_Run_Time_Mode then
5606 Error_Msg_CRT ("Attach_Handler pragma", N);
5608 Check_Interrupt_Or_Attach_Handler;
5610 -- The expression that designates the attribute may
5611 -- depend on a discriminant, and is therefore a per-
5612 -- object expression, to be expanded in the init proc.
5613 -- If expansion is enabled, perform semantic checks
5616 if Expander_Active then
5618 Temp : constant Node_Id :=
5619 New_Copy_Tree (Expression (Arg2));
5621 Set_Parent (Temp, N);
5622 Preanalyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
5626 Analyze (Expression (Arg2));
5627 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
5630 Process_Interrupt_Or_Attach_Handler;
5633 --------------------
5634 -- C_Pass_By_Copy --
5635 --------------------
5637 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
5639 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
5645 Check_Valid_Configuration_Pragma;
5646 Check_Arg_Count (1);
5647 Check_Optional_Identifier (Arg1, "max_size");
5649 Arg := Expression (Arg1);
5650 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
5652 Val := Expr_Value (Arg);
5656 ("maximum size for pragma% must be positive", Arg1);
5658 elsif UI_Is_In_Int_Range (Val) then
5659 Default_C_Record_Mechanism := UI_To_Int (Val);
5661 -- If a giant value is given, Int'Last will do well enough.
5662 -- If sometime someone complains that a record larger than
5663 -- two gigabytes is not copied, we will worry about it then!
5666 Default_C_Record_Mechanism := Mechanism_Type'Last;
5674 -- pragma Check ([Name =>] Identifier,
5675 -- [Check =>] Boolean_Expression
5676 -- [,[Message =>] String_Expression]);
5678 when Pragma_Check => Check : declare
5683 -- Set True if category of assertions referenced by Name enabled
5687 Check_At_Least_N_Arguments (2);
5688 Check_At_Most_N_Arguments (3);
5689 Check_Optional_Identifier (Arg1, Name_Name);
5690 Check_Optional_Identifier (Arg2, Name_Check);
5692 if Arg_Count = 3 then
5693 Check_Optional_Identifier (Arg3, Name_Message);
5694 Analyze_And_Resolve (Get_Pragma_Arg (Arg3), Standard_String);
5697 Check_Arg_Is_Identifier (Arg1);
5698 Check_On := Check_Enabled (Chars (Get_Pragma_Arg (Arg1)));
5700 -- If expansion is active and the check is not enabled then we
5701 -- rewrite the Check as:
5703 -- if False and then condition then
5707 -- The reason we do this rewriting during semantic analysis rather
5708 -- than as part of normal expansion is that we cannot analyze and
5709 -- expand the code for the boolean expression directly, or it may
5710 -- cause insertion of actions that would escape the attempt to
5711 -- suppress the check code.
5713 -- Note that the Sloc for the if statement corresponds to the
5714 -- argument condition, not the pragma itself. The reason for this
5715 -- is that we may generate a warning if the condition is False at
5716 -- compile time, and we do not want to delete this warning when we
5717 -- delete the if statement.
5719 Expr := Expression (Arg2);
5721 if Expander_Active and then not Check_On then
5722 Eloc := Sloc (Expr);
5725 Make_If_Statement (Eloc,
5727 Make_And_Then (Eloc,
5728 Left_Opnd => New_Occurrence_Of (Standard_False, Eloc),
5729 Right_Opnd => Expr),
5730 Then_Statements => New_List (
5731 Make_Null_Statement (Eloc))));
5738 Analyze_And_Resolve (Expr, Any_Boolean);
5741 -- If assertion is of the form (X'First = literal), where X is
5742 -- a formal, then set Low_Bound_Known flag on this formal.
5744 if Nkind (Expr) = N_Op_Eq then
5746 Right : constant Node_Id := Right_Opnd (Expr);
5747 Left : constant Node_Id := Left_Opnd (Expr);
5749 if Nkind (Left) = N_Attribute_Reference
5750 and then Attribute_Name (Left) = Name_First
5751 and then Is_Entity_Name (Prefix (Left))
5752 and then Is_Formal (Entity (Prefix (Left)))
5753 and then Nkind (Right) = N_Integer_Literal
5755 Set_Low_Bound_Known (Entity (Prefix (Left)));
5765 -- pragma Check_Name (check_IDENTIFIER);
5767 when Pragma_Check_Name =>
5768 Check_No_Identifiers;
5770 Check_Valid_Configuration_Pragma;
5771 Check_Arg_Count (1);
5772 Check_Arg_Is_Identifier (Arg1);
5775 Nam : constant Name_Id := Chars (Expression (Arg1));
5778 for J in Check_Names.First .. Check_Names.Last loop
5779 if Check_Names.Table (J) = Nam then
5784 Check_Names.Append (Nam);
5791 -- pragma Check_Policy (
5792 -- [Name =>] IDENTIFIER,
5793 -- [Policy =>] POLICY_IDENTIFIER);
5795 -- POLICY_IDENTIFIER ::= ON | OFF | CHECK | IGNORE
5797 -- Note: this is a configuration pragma, but it is allowed to
5798 -- appear anywhere else.
5800 when Pragma_Check_Policy =>
5802 Check_Arg_Count (2);
5803 Check_Optional_Identifier (Arg1, Name_Name);
5804 Check_Optional_Identifier (Arg2, Name_Policy);
5806 (Arg2, Name_On, Name_Off, Name_Check, Name_Ignore);
5808 -- A Check_Policy pragma can appear either as a configuration
5809 -- pragma, or in a declarative part or a package spec (see RM
5810 -- 11.5(5) for rules for Suppress/Unsuppress which are also
5811 -- followed for Check_Policy).
5813 if not Is_Configuration_Pragma then
5814 Check_Is_In_Decl_Part_Or_Package_Spec;
5817 Set_Next_Pragma (N, Opt.Check_Policy_List);
5818 Opt.Check_Policy_List := N;
5820 ---------------------
5821 -- CIL_Constructor --
5822 ---------------------
5824 -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME);
5826 -- Processing for this pragma is shared with Java_Constructor
5832 -- pragma Comment (static_string_EXPRESSION)
5834 -- Processing for pragma Comment shares the circuitry for pragma
5835 -- Ident. The only differences are that Ident enforces a limit of 31
5836 -- characters on its argument, and also enforces limitations on
5837 -- placement for DEC compatibility. Pragma Comment shares neither of
5838 -- these restrictions.
5844 -- pragma Common_Object (
5845 -- [Internal =>] LOCAL_NAME
5846 -- [, [External =>] EXTERNAL_SYMBOL]
5847 -- [, [Size =>] EXTERNAL_SYMBOL]);
5849 -- Processing for this pragma is shared with Psect_Object
5851 ------------------------
5852 -- Compile_Time_Error --
5853 ------------------------
5855 -- pragma Compile_Time_Error
5856 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5858 when Pragma_Compile_Time_Error =>
5860 Process_Compile_Time_Warning_Or_Error;
5862 --------------------------
5863 -- Compile_Time_Warning --
5864 --------------------------
5866 -- pragma Compile_Time_Warning
5867 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5869 when Pragma_Compile_Time_Warning =>
5871 Process_Compile_Time_Warning_Or_Error;
5877 when Pragma_Compiler_Unit =>
5879 Check_Arg_Count (0);
5880 Set_Is_Compiler_Unit (Get_Source_Unit (N));
5882 -----------------------------
5883 -- Complete_Representation --
5884 -----------------------------
5886 -- pragma Complete_Representation;
5888 when Pragma_Complete_Representation =>
5890 Check_Arg_Count (0);
5892 if Nkind (Parent (N)) /= N_Record_Representation_Clause then
5894 ("pragma & must appear within record representation clause");
5897 ----------------------------
5898 -- Complex_Representation --
5899 ----------------------------
5901 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
5903 when Pragma_Complex_Representation => Complex_Representation : declare
5910 Check_Arg_Count (1);
5911 Check_Optional_Identifier (Arg1, Name_Entity);
5912 Check_Arg_Is_Local_Name (Arg1);
5913 E_Id := Expression (Arg1);
5915 if Etype (E_Id) = Any_Type then
5921 if not Is_Record_Type (E) then
5923 ("argument for pragma% must be record type", Arg1);
5926 Ent := First_Entity (E);
5929 or else No (Next_Entity (Ent))
5930 or else Present (Next_Entity (Next_Entity (Ent)))
5931 or else not Is_Floating_Point_Type (Etype (Ent))
5932 or else Etype (Ent) /= Etype (Next_Entity (Ent))
5935 ("record for pragma% must have two fields of the same "
5936 & "floating-point type", Arg1);
5939 Set_Has_Complex_Representation (Base_Type (E));
5941 -- We need to treat the type has having a non-standard
5942 -- representation, for back-end purposes, even though in
5943 -- general a complex will have the default representation
5944 -- of a record with two real components.
5946 Set_Has_Non_Standard_Rep (Base_Type (E));
5948 end Complex_Representation;
5950 -------------------------
5951 -- Component_Alignment --
5952 -------------------------
5954 -- pragma Component_Alignment (
5955 -- [Form =>] ALIGNMENT_CHOICE
5956 -- [, [Name =>] type_LOCAL_NAME]);
5958 -- ALIGNMENT_CHOICE ::=
5960 -- | Component_Size_4
5964 when Pragma_Component_Alignment => Component_AlignmentP : declare
5965 Args : Args_List (1 .. 2);
5966 Names : constant Name_List (1 .. 2) := (
5970 Form : Node_Id renames Args (1);
5971 Name : Node_Id renames Args (2);
5973 Atype : Component_Alignment_Kind;
5978 Gather_Associations (Names, Args);
5981 Error_Pragma ("missing Form argument for pragma%");
5984 Check_Arg_Is_Identifier (Form);
5986 -- Get proper alignment, note that Default = Component_Size
5987 -- on all machines we have so far, and we want to set this
5988 -- value rather than the default value to indicate that it
5989 -- has been explicitly set (and thus will not get overridden
5990 -- by the default component alignment for the current scope)
5992 if Chars (Form) = Name_Component_Size then
5993 Atype := Calign_Component_Size;
5995 elsif Chars (Form) = Name_Component_Size_4 then
5996 Atype := Calign_Component_Size_4;
5998 elsif Chars (Form) = Name_Default then
5999 Atype := Calign_Component_Size;
6001 elsif Chars (Form) = Name_Storage_Unit then
6002 Atype := Calign_Storage_Unit;
6006 ("invalid Form parameter for pragma%", Form);
6009 -- Case with no name, supplied, affects scope table entry
6013 (Scope_Stack.Last).Component_Alignment_Default := Atype;
6015 -- Case of name supplied
6018 Check_Arg_Is_Local_Name (Name);
6020 Typ := Entity (Name);
6023 or else Rep_Item_Too_Early (Typ, N)
6027 Typ := Underlying_Type (Typ);
6030 if not Is_Record_Type (Typ)
6031 and then not Is_Array_Type (Typ)
6034 ("Name parameter of pragma% must identify record or " &
6035 "array type", Name);
6038 -- An explicit Component_Alignment pragma overrides an
6039 -- implicit pragma Pack, but not an explicit one.
6041 if not Has_Pragma_Pack (Base_Type (Typ)) then
6042 Set_Is_Packed (Base_Type (Typ), False);
6043 Set_Component_Alignment (Base_Type (Typ), Atype);
6046 end Component_AlignmentP;
6052 -- pragma Controlled (first_subtype_LOCAL_NAME);
6054 when Pragma_Controlled => Controlled : declare
6058 Check_No_Identifiers;
6059 Check_Arg_Count (1);
6060 Check_Arg_Is_Local_Name (Arg1);
6061 Arg := Expression (Arg1);
6063 if not Is_Entity_Name (Arg)
6064 or else not Is_Access_Type (Entity (Arg))
6066 Error_Pragma_Arg ("pragma% requires access type", Arg1);
6068 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
6076 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
6077 -- [Entity =>] LOCAL_NAME);
6079 when Pragma_Convention => Convention : declare
6082 pragma Warnings (Off, C);
6083 pragma Warnings (Off, E);
6085 Check_Arg_Order ((Name_Convention, Name_Entity));
6086 Check_Ada_83_Warning;
6087 Check_Arg_Count (2);
6088 Process_Convention (C, E);
6091 ---------------------------
6092 -- Convention_Identifier --
6093 ---------------------------
6095 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
6096 -- [Convention =>] convention_IDENTIFIER);
6098 when Pragma_Convention_Identifier => Convention_Identifier : declare
6104 Check_Arg_Order ((Name_Name, Name_Convention));
6105 Check_Arg_Count (2);
6106 Check_Optional_Identifier (Arg1, Name_Name);
6107 Check_Optional_Identifier (Arg2, Name_Convention);
6108 Check_Arg_Is_Identifier (Arg1);
6109 Check_Arg_Is_Identifier (Arg2);
6110 Idnam := Chars (Expression (Arg1));
6111 Cname := Chars (Expression (Arg2));
6113 if Is_Convention_Name (Cname) then
6114 Record_Convention_Identifier
6115 (Idnam, Get_Convention_Id (Cname));
6118 ("second arg for % pragma must be convention", Arg2);
6120 end Convention_Identifier;
6126 -- pragma CPP_Class ([Entity =>] local_NAME)
6128 when Pragma_CPP_Class => CPP_Class : declare
6133 if Warn_On_Obsolescent_Feature then
6135 ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" &
6136 " by pragma import?", N);
6140 Check_Arg_Count (1);
6141 Check_Optional_Identifier (Arg1, Name_Entity);
6142 Check_Arg_Is_Local_Name (Arg1);
6144 Arg := Expression (Arg1);
6147 if Etype (Arg) = Any_Type then
6151 if not Is_Entity_Name (Arg)
6152 or else not Is_Type (Entity (Arg))
6154 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6157 Typ := Entity (Arg);
6159 if not Is_Tagged_Type (Typ) then
6160 Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1);
6163 -- Types treated as CPP classes are treated as limited, but we
6164 -- don't require them to be declared this way. A warning is issued
6165 -- to encourage the user to declare them as limited. This is not
6166 -- an error, for compatibility reasons, because these types have
6167 -- been supported this way for some time.
6169 if not Is_Limited_Type (Typ) then
6171 ("imported 'C'P'P type should be " &
6172 "explicitly declared limited?",
6173 Get_Pragma_Arg (Arg1));
6175 ("\type will be considered limited",
6176 Get_Pragma_Arg (Arg1));
6179 Set_Is_CPP_Class (Typ);
6180 Set_Is_Limited_Record (Typ);
6181 Set_Convention (Typ, Convention_CPP);
6184 ---------------------
6185 -- CPP_Constructor --
6186 ---------------------
6188 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME
6189 -- [, [External_Name =>] static_string_EXPRESSION ]
6190 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6192 when Pragma_CPP_Constructor => CPP_Constructor : declare
6198 Check_At_Least_N_Arguments (1);
6199 Check_At_Most_N_Arguments (3);
6200 Check_Optional_Identifier (Arg1, Name_Entity);
6201 Check_Arg_Is_Local_Name (Arg1);
6203 Id := Expression (Arg1);
6204 Find_Program_Unit_Name (Id);
6206 -- If we did not find the name, we are done
6208 if Etype (Id) = Any_Type then
6212 Def_Id := Entity (Id);
6214 if Ekind (Def_Id) = E_Function
6215 and then Is_Class_Wide_Type (Etype (Def_Id))
6216 and then Is_CPP_Class (Etype (Etype (Def_Id)))
6218 if Arg_Count >= 2 then
6219 Set_Imported (Def_Id);
6220 Set_Is_Public (Def_Id);
6221 Process_Interface_Name (Def_Id, Arg2, Arg3);
6224 if No (Parameter_Specifications (Parent (Def_Id))) then
6225 Set_Has_Completion (Def_Id);
6226 Set_Is_Constructor (Def_Id);
6229 ("non-default constructors not implemented", Arg1);
6234 ("pragma% requires function returning a 'C'P'P_Class type",
6237 end CPP_Constructor;
6243 when Pragma_CPP_Virtual => CPP_Virtual : declare
6247 if Warn_On_Obsolescent_Feature then
6249 ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " &
6258 when Pragma_CPP_Vtable => CPP_Vtable : declare
6262 if Warn_On_Obsolescent_Feature then
6264 ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " &
6273 -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
6275 when Pragma_Debug => Debug : declare
6283 (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
6286 if Arg_Count = 2 then
6289 Left_Opnd => Relocate_Node (Cond),
6290 Right_Opnd => Expression (Arg1));
6293 -- Rewrite into a conditional with an appropriate condition. We
6294 -- wrap the procedure call in a block so that overhead from e.g.
6295 -- use of the secondary stack does not generate execution overhead
6296 -- for suppressed conditions.
6298 Rewrite (N, Make_Implicit_If_Statement (N,
6300 Then_Statements => New_List (
6301 Make_Block_Statement (Loc,
6302 Handled_Statement_Sequence =>
6303 Make_Handled_Sequence_Of_Statements (Loc,
6304 Statements => New_List (
6305 Relocate_Node (Debug_Statement (N))))))));
6313 -- pragma Debug_Policy (Check | Ignore)
6315 when Pragma_Debug_Policy =>
6317 Check_Arg_Count (1);
6318 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
6319 Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
6321 ---------------------
6322 -- Detect_Blocking --
6323 ---------------------
6325 -- pragma Detect_Blocking;
6327 when Pragma_Detect_Blocking =>
6329 Check_Arg_Count (0);
6330 Check_Valid_Configuration_Pragma;
6331 Detect_Blocking := True;
6337 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
6339 when Pragma_Discard_Names => Discard_Names : declare
6344 Check_Ada_83_Warning;
6346 -- Deal with configuration pragma case
6348 if Arg_Count = 0 and then Is_Configuration_Pragma then
6349 Global_Discard_Names := True;
6352 -- Otherwise, check correct appropriate context
6355 Check_Is_In_Decl_Part_Or_Package_Spec;
6357 if Arg_Count = 0 then
6359 -- If there is no parameter, then from now on this pragma
6360 -- applies to any enumeration, exception or tagged type
6361 -- defined in the current declarative part, and recursively
6362 -- to any nested scope.
6364 Set_Discard_Names (Current_Scope);
6368 Check_Arg_Count (1);
6369 Check_Optional_Identifier (Arg1, Name_On);
6370 Check_Arg_Is_Local_Name (Arg1);
6372 E_Id := Expression (Arg1);
6374 if Etype (E_Id) = Any_Type then
6380 if (Is_First_Subtype (E)
6382 (Is_Enumeration_Type (E) or else Is_Tagged_Type (E)))
6383 or else Ekind (E) = E_Exception
6385 Set_Discard_Names (E);
6388 ("inappropriate entity for pragma%", Arg1);
6399 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
6401 when Pragma_Elaborate => Elaborate : declare
6406 -- Pragma must be in context items list of a compilation unit
6408 if not Is_In_Context_Clause then
6412 -- Must be at least one argument
6414 if Arg_Count = 0 then
6415 Error_Pragma ("pragma% requires at least one argument");
6418 -- In Ada 83 mode, there can be no items following it in the
6419 -- context list except other pragmas and implicit with clauses
6420 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
6421 -- placement rule does not apply.
6423 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
6425 while Present (Citem) loop
6426 if Nkind (Citem) = N_Pragma
6427 or else (Nkind (Citem) = N_With_Clause
6428 and then Implicit_With (Citem))
6433 ("(Ada 83) pragma% must be at end of context clause");
6440 -- Finally, the arguments must all be units mentioned in a with
6441 -- clause in the same context clause. Note we already checked (in
6442 -- Par.Prag) that the arguments are all identifiers or selected
6446 Outer : while Present (Arg) loop
6447 Citem := First (List_Containing (N));
6448 Inner : while Citem /= N loop
6449 if Nkind (Citem) = N_With_Clause
6450 and then Same_Name (Name (Citem), Expression (Arg))
6452 Set_Elaborate_Present (Citem, True);
6453 Set_Unit_Name (Expression (Arg), Name (Citem));
6455 -- With the pragma present, elaboration calls on
6456 -- subprograms from the named unit need no further
6457 -- checks, as long as the pragma appears in the current
6458 -- compilation unit. If the pragma appears in some unit
6459 -- in the context, there might still be a need for an
6460 -- Elaborate_All_Desirable from the current compilation
6461 -- to the named unit, so we keep the check enabled.
6463 if In_Extended_Main_Source_Unit (N) then
6464 Set_Suppress_Elaboration_Warnings
6465 (Entity (Name (Citem)));
6476 ("argument of pragma% is not with'ed unit", Arg);
6482 -- Give a warning if operating in static mode with -gnatwl
6483 -- (elaboration warnings enabled) switch set.
6485 if Elab_Warnings and not Dynamic_Elaboration_Checks then
6487 ("?use of pragma Elaborate may not be safe", N);
6489 ("?use pragma Elaborate_All instead if possible", N);
6497 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
6499 when Pragma_Elaborate_All => Elaborate_All : declare
6504 Check_Ada_83_Warning;
6506 -- Pragma must be in context items list of a compilation unit
6508 if not Is_In_Context_Clause then
6512 -- Must be at least one argument
6514 if Arg_Count = 0 then
6515 Error_Pragma ("pragma% requires at least one argument");
6518 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
6519 -- have to appear at the end of the context clause, but may
6520 -- appear mixed in with other items, even in Ada 83 mode.
6522 -- Final check: the arguments must all be units mentioned in
6523 -- a with clause in the same context clause. Note that we
6524 -- already checked (in Par.Prag) that all the arguments are
6525 -- either identifiers or selected components.
6528 Outr : while Present (Arg) loop
6529 Citem := First (List_Containing (N));
6530 Innr : while Citem /= N loop
6531 if Nkind (Citem) = N_With_Clause
6532 and then Same_Name (Name (Citem), Expression (Arg))
6534 Set_Elaborate_All_Present (Citem, True);
6535 Set_Unit_Name (Expression (Arg), Name (Citem));
6537 -- Suppress warnings and elaboration checks on the named
6538 -- unit if the pragma is in the current compilation, as
6539 -- for pragma Elaborate.
6541 if In_Extended_Main_Source_Unit (N) then
6542 Set_Suppress_Elaboration_Warnings
6543 (Entity (Name (Citem)));
6552 Set_Error_Posted (N);
6554 ("argument of pragma% is not with'ed unit", Arg);
6561 --------------------
6562 -- Elaborate_Body --
6563 --------------------
6565 -- pragma Elaborate_Body [( library_unit_NAME )];
6567 when Pragma_Elaborate_Body => Elaborate_Body : declare
6568 Cunit_Node : Node_Id;
6569 Cunit_Ent : Entity_Id;
6572 Check_Ada_83_Warning;
6573 Check_Valid_Library_Unit_Pragma;
6575 if Nkind (N) = N_Null_Statement then
6579 Cunit_Node := Cunit (Current_Sem_Unit);
6580 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
6582 if Nkind_In (Unit (Cunit_Node), N_Package_Body,
6585 Error_Pragma ("pragma% must refer to a spec, not a body");
6587 Set_Body_Required (Cunit_Node, True);
6588 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
6590 -- If we are in dynamic elaboration mode, then we suppress
6591 -- elaboration warnings for the unit, since it is definitely
6592 -- fine NOT to do dynamic checks at the first level (and such
6593 -- checks will be suppressed because no elaboration boolean
6594 -- is created for Elaborate_Body packages).
6596 -- But in the static model of elaboration, Elaborate_Body is
6597 -- definitely NOT good enough to ensure elaboration safety on
6598 -- its own, since the body may WITH other units that are not
6599 -- safe from an elaboration point of view, so a client must
6600 -- still do an Elaborate_All on such units.
6602 -- Debug flag -gnatdD restores the old behavior of 3.13,
6603 -- where Elaborate_Body always suppressed elab warnings.
6605 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
6606 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
6611 ------------------------
6612 -- Elaboration_Checks --
6613 ------------------------
6615 -- pragma Elaboration_Checks (Static | Dynamic);
6617 when Pragma_Elaboration_Checks =>
6619 Check_Arg_Count (1);
6620 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
6621 Dynamic_Elaboration_Checks :=
6622 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
6628 -- pragma Eliminate (
6629 -- [Unit_Name =>] IDENTIFIER | SELECTED_COMPONENT,
6630 -- [,[Entity =>] IDENTIFIER |
6631 -- SELECTED_COMPONENT |
6633 -- [, OVERLOADING_RESOLUTION]);
6635 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
6638 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
6641 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
6643 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
6644 -- Result_Type => result_SUBTYPE_NAME]
6646 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
6647 -- SUBTYPE_NAME ::= STRING_LITERAL
6649 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
6650 -- SOURCE_TRACE ::= STRING_LITERAL
6652 when Pragma_Eliminate => Eliminate : declare
6653 Args : Args_List (1 .. 5);
6654 Names : constant Name_List (1 .. 5) := (
6657 Name_Parameter_Types,
6659 Name_Source_Location);
6661 Unit_Name : Node_Id renames Args (1);
6662 Entity : Node_Id renames Args (2);
6663 Parameter_Types : Node_Id renames Args (3);
6664 Result_Type : Node_Id renames Args (4);
6665 Source_Location : Node_Id renames Args (5);
6669 Check_Valid_Configuration_Pragma;
6670 Gather_Associations (Names, Args);
6672 if No (Unit_Name) then
6673 Error_Pragma ("missing Unit_Name argument for pragma%");
6677 and then (Present (Parameter_Types)
6679 Present (Result_Type)
6681 Present (Source_Location))
6683 Error_Pragma ("missing Entity argument for pragma%");
6686 if (Present (Parameter_Types)
6688 Present (Result_Type))
6690 Present (Source_Location)
6693 ("parameter profile and source location cannot " &
6694 "be used together in pragma%");
6697 Process_Eliminate_Pragma
6711 -- [ Convention =>] convention_IDENTIFIER,
6712 -- [ Entity =>] local_NAME
6713 -- [, [External_Name =>] static_string_EXPRESSION ]
6714 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6716 when Pragma_Export => Export : declare
6720 pragma Warnings (Off, C);
6723 Check_Ada_83_Warning;
6729 Check_At_Least_N_Arguments (2);
6730 Check_At_Most_N_Arguments (4);
6731 Process_Convention (C, Def_Id);
6733 if Ekind (Def_Id) /= E_Constant then
6734 Note_Possible_Modification (Expression (Arg2), Sure => False);
6737 Process_Interface_Name (Def_Id, Arg3, Arg4);
6738 Set_Exported (Def_Id, Arg2);
6740 -- If the entity is a deferred constant, propagate the
6741 -- information to the full view, because gigi elaborates
6742 -- the full view only.
6744 if Ekind (Def_Id) = E_Constant
6745 and then Present (Full_View (Def_Id))
6748 Id2 : constant Entity_Id := Full_View (Def_Id);
6750 Set_Is_Exported (Id2, Is_Exported (Def_Id));
6751 Set_First_Rep_Item (Id2, First_Rep_Item (Def_Id));
6752 Set_Interface_Name (Id2, Einfo.Interface_Name (Def_Id));
6757 ----------------------
6758 -- Export_Exception --
6759 ----------------------
6761 -- pragma Export_Exception (
6762 -- [Internal =>] LOCAL_NAME
6763 -- [, [External =>] EXTERNAL_SYMBOL]
6764 -- [, [Form =>] Ada | VMS]
6765 -- [, [Code =>] static_integer_EXPRESSION]);
6767 when Pragma_Export_Exception => Export_Exception : declare
6768 Args : Args_List (1 .. 4);
6769 Names : constant Name_List (1 .. 4) := (
6775 Internal : Node_Id renames Args (1);
6776 External : Node_Id renames Args (2);
6777 Form : Node_Id renames Args (3);
6778 Code : Node_Id renames Args (4);
6783 if Inside_A_Generic then
6784 Error_Pragma ("pragma% cannot be used for generic entities");
6787 Gather_Associations (Names, Args);
6788 Process_Extended_Import_Export_Exception_Pragma (
6789 Arg_Internal => Internal,
6790 Arg_External => External,
6794 if not Is_VMS_Exception (Entity (Internal)) then
6795 Set_Exported (Entity (Internal), Internal);
6797 end Export_Exception;
6799 ---------------------
6800 -- Export_Function --
6801 ---------------------
6803 -- pragma Export_Function (
6804 -- [Internal =>] LOCAL_NAME
6805 -- [, [External =>] EXTERNAL_SYMBOL]
6806 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6807 -- [, [Result_Type =>] TYPE_DESIGNATOR]
6808 -- [, [Mechanism =>] MECHANISM]
6809 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
6811 -- EXTERNAL_SYMBOL ::=
6813 -- | static_string_EXPRESSION
6815 -- PARAMETER_TYPES ::=
6817 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6819 -- TYPE_DESIGNATOR ::=
6821 -- | subtype_Name ' Access
6825 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6827 -- MECHANISM_ASSOCIATION ::=
6828 -- [formal_parameter_NAME =>] MECHANISM_NAME
6830 -- MECHANISM_NAME ::=
6833 -- | Descriptor [([Class =>] CLASS_NAME)]
6835 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6837 when Pragma_Export_Function => Export_Function : declare
6838 Args : Args_List (1 .. 6);
6839 Names : constant Name_List (1 .. 6) := (
6842 Name_Parameter_Types,
6845 Name_Result_Mechanism);
6847 Internal : Node_Id renames Args (1);
6848 External : Node_Id renames Args (2);
6849 Parameter_Types : Node_Id renames Args (3);
6850 Result_Type : Node_Id renames Args (4);
6851 Mechanism : Node_Id renames Args (5);
6852 Result_Mechanism : Node_Id renames Args (6);
6856 Gather_Associations (Names, Args);
6857 Process_Extended_Import_Export_Subprogram_Pragma (
6858 Arg_Internal => Internal,
6859 Arg_External => External,
6860 Arg_Parameter_Types => Parameter_Types,
6861 Arg_Result_Type => Result_Type,
6862 Arg_Mechanism => Mechanism,
6863 Arg_Result_Mechanism => Result_Mechanism);
6864 end Export_Function;
6870 -- pragma Export_Object (
6871 -- [Internal =>] LOCAL_NAME
6872 -- [, [External =>] EXTERNAL_SYMBOL]
6873 -- [, [Size =>] EXTERNAL_SYMBOL]);
6875 -- EXTERNAL_SYMBOL ::=
6877 -- | static_string_EXPRESSION
6879 -- PARAMETER_TYPES ::=
6881 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6883 -- TYPE_DESIGNATOR ::=
6885 -- | subtype_Name ' Access
6889 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6891 -- MECHANISM_ASSOCIATION ::=
6892 -- [formal_parameter_NAME =>] MECHANISM_NAME
6894 -- MECHANISM_NAME ::=
6897 -- | Descriptor [([Class =>] CLASS_NAME)]
6899 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6901 when Pragma_Export_Object => Export_Object : declare
6902 Args : Args_List (1 .. 3);
6903 Names : constant Name_List (1 .. 3) := (
6908 Internal : Node_Id renames Args (1);
6909 External : Node_Id renames Args (2);
6910 Size : Node_Id renames Args (3);
6914 Gather_Associations (Names, Args);
6915 Process_Extended_Import_Export_Object_Pragma (
6916 Arg_Internal => Internal,
6917 Arg_External => External,
6921 ----------------------
6922 -- Export_Procedure --
6923 ----------------------
6925 -- pragma Export_Procedure (
6926 -- [Internal =>] LOCAL_NAME
6927 -- [, [External =>] EXTERNAL_SYMBOL]
6928 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6929 -- [, [Mechanism =>] MECHANISM]);
6931 -- EXTERNAL_SYMBOL ::=
6933 -- | static_string_EXPRESSION
6935 -- PARAMETER_TYPES ::=
6937 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6939 -- TYPE_DESIGNATOR ::=
6941 -- | subtype_Name ' Access
6945 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6947 -- MECHANISM_ASSOCIATION ::=
6948 -- [formal_parameter_NAME =>] MECHANISM_NAME
6950 -- MECHANISM_NAME ::=
6953 -- | Descriptor [([Class =>] CLASS_NAME)]
6955 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6957 when Pragma_Export_Procedure => Export_Procedure : declare
6958 Args : Args_List (1 .. 4);
6959 Names : constant Name_List (1 .. 4) := (
6962 Name_Parameter_Types,
6965 Internal : Node_Id renames Args (1);
6966 External : Node_Id renames Args (2);
6967 Parameter_Types : Node_Id renames Args (3);
6968 Mechanism : Node_Id renames Args (4);
6972 Gather_Associations (Names, Args);
6973 Process_Extended_Import_Export_Subprogram_Pragma (
6974 Arg_Internal => Internal,
6975 Arg_External => External,
6976 Arg_Parameter_Types => Parameter_Types,
6977 Arg_Mechanism => Mechanism);
6978 end Export_Procedure;
6984 -- pragma Export_Value (
6985 -- [Value =>] static_integer_EXPRESSION,
6986 -- [Link_Name =>] static_string_EXPRESSION);
6988 when Pragma_Export_Value =>
6990 Check_Arg_Order ((Name_Value, Name_Link_Name));
6991 Check_Arg_Count (2);
6993 Check_Optional_Identifier (Arg1, Name_Value);
6994 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6996 Check_Optional_Identifier (Arg2, Name_Link_Name);
6997 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
6999 -----------------------------
7000 -- Export_Valued_Procedure --
7001 -----------------------------
7003 -- pragma Export_Valued_Procedure (
7004 -- [Internal =>] LOCAL_NAME
7005 -- [, [External =>] EXTERNAL_SYMBOL,]
7006 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7007 -- [, [Mechanism =>] MECHANISM]);
7009 -- EXTERNAL_SYMBOL ::=
7011 -- | static_string_EXPRESSION
7013 -- PARAMETER_TYPES ::=
7015 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7017 -- TYPE_DESIGNATOR ::=
7019 -- | subtype_Name ' Access
7023 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7025 -- MECHANISM_ASSOCIATION ::=
7026 -- [formal_parameter_NAME =>] MECHANISM_NAME
7028 -- MECHANISM_NAME ::=
7031 -- | Descriptor [([Class =>] CLASS_NAME)]
7033 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7035 when Pragma_Export_Valued_Procedure =>
7036 Export_Valued_Procedure : declare
7037 Args : Args_List (1 .. 4);
7038 Names : constant Name_List (1 .. 4) := (
7041 Name_Parameter_Types,
7044 Internal : Node_Id renames Args (1);
7045 External : Node_Id renames Args (2);
7046 Parameter_Types : Node_Id renames Args (3);
7047 Mechanism : Node_Id renames Args (4);
7051 Gather_Associations (Names, Args);
7052 Process_Extended_Import_Export_Subprogram_Pragma (
7053 Arg_Internal => Internal,
7054 Arg_External => External,
7055 Arg_Parameter_Types => Parameter_Types,
7056 Arg_Mechanism => Mechanism);
7057 end Export_Valued_Procedure;
7063 -- pragma Extend_System ([Name =>] Identifier);
7065 when Pragma_Extend_System => Extend_System : declare
7068 Check_Valid_Configuration_Pragma;
7069 Check_Arg_Count (1);
7070 Check_Optional_Identifier (Arg1, Name_Name);
7071 Check_Arg_Is_Identifier (Arg1);
7073 Get_Name_String (Chars (Expression (Arg1)));
7076 and then Name_Buffer (1 .. 4) = "aux_"
7078 if Present (System_Extend_Pragma_Arg) then
7079 if Chars (Expression (Arg1)) =
7080 Chars (Expression (System_Extend_Pragma_Arg))
7084 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
7085 Error_Pragma ("pragma% conflicts with that #");
7089 System_Extend_Pragma_Arg := Arg1;
7091 if not GNAT_Mode then
7092 System_Extend_Unit := Arg1;
7096 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
7100 ------------------------
7101 -- Extensions_Allowed --
7102 ------------------------
7104 -- pragma Extensions_Allowed (ON | OFF);
7106 when Pragma_Extensions_Allowed =>
7108 Check_Arg_Count (1);
7109 Check_No_Identifiers;
7110 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7112 if Chars (Expression (Arg1)) = Name_On then
7113 Extensions_Allowed := True;
7115 Extensions_Allowed := False;
7122 -- pragma External (
7123 -- [ Convention =>] convention_IDENTIFIER,
7124 -- [ Entity =>] local_NAME
7125 -- [, [External_Name =>] static_string_EXPRESSION ]
7126 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7128 when Pragma_External => External : declare
7132 pragma Warnings (Off, C);
7141 Check_At_Least_N_Arguments (2);
7142 Check_At_Most_N_Arguments (4);
7143 Process_Convention (C, Def_Id);
7144 Note_Possible_Modification (Expression (Arg2), Sure => False);
7145 Process_Interface_Name (Def_Id, Arg3, Arg4);
7146 Set_Exported (Def_Id, Arg2);
7149 --------------------------
7150 -- External_Name_Casing --
7151 --------------------------
7153 -- pragma External_Name_Casing (
7154 -- UPPERCASE | LOWERCASE
7155 -- [, AS_IS | UPPERCASE | LOWERCASE]);
7157 when Pragma_External_Name_Casing => External_Name_Casing : declare
7160 Check_No_Identifiers;
7162 if Arg_Count = 2 then
7164 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
7166 case Chars (Get_Pragma_Arg (Arg2)) is
7168 Opt.External_Name_Exp_Casing := As_Is;
7170 when Name_Uppercase =>
7171 Opt.External_Name_Exp_Casing := Uppercase;
7173 when Name_Lowercase =>
7174 Opt.External_Name_Exp_Casing := Lowercase;
7181 Check_Arg_Count (1);
7184 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
7186 case Chars (Get_Pragma_Arg (Arg1)) is
7187 when Name_Uppercase =>
7188 Opt.External_Name_Imp_Casing := Uppercase;
7190 when Name_Lowercase =>
7191 Opt.External_Name_Imp_Casing := Lowercase;
7196 end External_Name_Casing;
7198 --------------------------
7199 -- Favor_Top_Level --
7200 --------------------------
7202 -- pragma Favor_Top_Level (type_NAME);
7204 when Pragma_Favor_Top_Level => Favor_Top_Level : declare
7205 Named_Entity : Entity_Id;
7209 Check_No_Identifiers;
7210 Check_Arg_Count (1);
7211 Check_Arg_Is_Local_Name (Arg1);
7212 Named_Entity := Entity (Expression (Arg1));
7214 -- If it's an access-to-subprogram type (in particular, not a
7215 -- subtype), set the flag on that type.
7217 if Is_Access_Subprogram_Type (Named_Entity) then
7218 Set_Can_Use_Internal_Rep (Named_Entity, False);
7220 -- Otherwise it's an error (name denotes the wrong sort of entity)
7224 ("access-to-subprogram type expected", Expression (Arg1));
7226 end Favor_Top_Level;
7232 -- pragma Fast_Math;
7234 when Pragma_Fast_Math =>
7236 Check_No_Identifiers;
7237 Check_Valid_Configuration_Pragma;
7240 ---------------------------
7241 -- Finalize_Storage_Only --
7242 ---------------------------
7244 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
7246 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
7247 Assoc : constant Node_Id := Arg1;
7248 Type_Id : constant Node_Id := Expression (Assoc);
7253 Check_No_Identifiers;
7254 Check_Arg_Count (1);
7255 Check_Arg_Is_Local_Name (Arg1);
7257 Find_Type (Type_Id);
7258 Typ := Entity (Type_Id);
7261 or else Rep_Item_Too_Early (Typ, N)
7265 Typ := Underlying_Type (Typ);
7268 if not Is_Controlled (Typ) then
7269 Error_Pragma ("pragma% must specify controlled type");
7272 Check_First_Subtype (Arg1);
7274 if Finalize_Storage_Only (Typ) then
7275 Error_Pragma ("duplicate pragma%, only one allowed");
7277 elsif not Rep_Item_Too_Late (Typ, N) then
7278 Set_Finalize_Storage_Only (Base_Type (Typ), True);
7280 end Finalize_Storage;
7282 --------------------------
7283 -- Float_Representation --
7284 --------------------------
7286 -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
7288 -- FLOAT_REP ::= VAX_Float | IEEE_Float
7290 when Pragma_Float_Representation => Float_Representation : declare
7298 if Arg_Count = 1 then
7299 Check_Valid_Configuration_Pragma;
7301 Check_Arg_Count (2);
7302 Check_Optional_Identifier (Arg2, Name_Entity);
7303 Check_Arg_Is_Local_Name (Arg2);
7306 Check_No_Identifier (Arg1);
7307 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
7309 if not OpenVMS_On_Target then
7310 if Chars (Expression (Arg1)) = Name_VAX_Float then
7312 ("?pragma% ignored (applies only to Open'V'M'S)");
7318 -- One argument case
7320 if Arg_Count = 1 then
7321 if Chars (Expression (Arg1)) = Name_VAX_Float then
7322 if Opt.Float_Format = 'I' then
7323 Error_Pragma ("'I'E'E'E format previously specified");
7326 Opt.Float_Format := 'V';
7329 if Opt.Float_Format = 'V' then
7330 Error_Pragma ("'V'A'X format previously specified");
7333 Opt.Float_Format := 'I';
7336 Set_Standard_Fpt_Formats;
7338 -- Two argument case
7341 Argx := Get_Pragma_Arg (Arg2);
7343 if not Is_Entity_Name (Argx)
7344 or else not Is_Floating_Point_Type (Entity (Argx))
7347 ("second argument of% pragma must be floating-point type",
7351 Ent := Entity (Argx);
7352 Digs := UI_To_Int (Digits_Value (Ent));
7354 -- Two arguments, VAX_Float case
7356 if Chars (Expression (Arg1)) = Name_VAX_Float then
7358 when 6 => Set_F_Float (Ent);
7359 when 9 => Set_D_Float (Ent);
7360 when 15 => Set_G_Float (Ent);
7364 ("wrong digits value, must be 6,9 or 15", Arg2);
7367 -- Two arguments, IEEE_Float case
7371 when 6 => Set_IEEE_Short (Ent);
7372 when 15 => Set_IEEE_Long (Ent);
7376 ("wrong digits value, must be 6 or 15", Arg2);
7380 end Float_Representation;
7386 -- pragma Ident (static_string_EXPRESSION)
7388 -- Note: pragma Comment shares this processing. Pragma Comment
7389 -- is identical to Ident, except that the restriction of the
7390 -- argument to 31 characters and the placement restrictions
7391 -- are not enforced for pragma Comment.
7393 when Pragma_Ident | Pragma_Comment => Ident : declare
7398 Check_Arg_Count (1);
7399 Check_No_Identifiers;
7400 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7402 -- For pragma Ident, preserve DEC compatibility by requiring
7403 -- the pragma to appear in a declarative part or package spec.
7405 if Prag_Id = Pragma_Ident then
7406 Check_Is_In_Decl_Part_Or_Package_Spec;
7409 Str := Expr_Value_S (Expression (Arg1));
7416 GP := Parent (Parent (N));
7418 if Nkind_In (GP, N_Package_Declaration,
7419 N_Generic_Package_Declaration)
7424 -- If we have a compilation unit, then record the ident
7425 -- value, checking for improper duplication.
7427 if Nkind (GP) = N_Compilation_Unit then
7428 CS := Ident_String (Current_Sem_Unit);
7430 if Present (CS) then
7432 -- For Ident, we do not permit multiple instances
7434 if Prag_Id = Pragma_Ident then
7435 Error_Pragma ("duplicate% pragma not permitted");
7437 -- For Comment, we concatenate the string, unless we
7438 -- want to preserve the tree structure for ASIS.
7440 elsif not ASIS_Mode then
7441 Start_String (Strval (CS));
7442 Store_String_Char (' ');
7443 Store_String_Chars (Strval (Str));
7444 Set_Strval (CS, End_String);
7448 -- In VMS, the effect of IDENT is achieved by passing
7449 -- IDENTIFICATION=name as a --for-linker switch.
7451 if OpenVMS_On_Target then
7454 ("--for-linker=IDENTIFICATION=");
7455 String_To_Name_Buffer (Strval (Str));
7456 Store_String_Chars (Name_Buffer (1 .. Name_Len));
7458 -- Only the last processed IDENT is saved. The main
7459 -- purpose is so an IDENT associated with a main
7460 -- procedure will be used in preference to an IDENT
7461 -- associated with a with'd package.
7463 Replace_Linker_Option_String
7464 (End_String, "--for-linker=IDENTIFICATION=");
7467 Set_Ident_String (Current_Sem_Unit, Str);
7470 -- For subunits, we just ignore the Ident, since in GNAT
7471 -- these are not separate object files, and hence not
7472 -- separate units in the unit table.
7474 elsif Nkind (GP) = N_Subunit then
7477 -- Otherwise we have a misplaced pragma Ident, but we ignore
7478 -- this if we are in an instantiation, since it comes from
7479 -- a generic, and has no relevance to the instantiation.
7481 elsif Prag_Id = Pragma_Ident then
7482 if Instantiation_Location (Loc) = No_Location then
7483 Error_Pragma ("pragma% only allowed at outer level");
7489 --------------------------
7490 -- Implemented_By_Entry --
7491 --------------------------
7493 -- pragma Implemented_By_Entry (DIRECT_NAME);
7495 when Pragma_Implemented_By_Entry => Implemented_By_Entry : declare
7500 Check_Arg_Count (1);
7501 Check_No_Identifiers;
7502 Check_Arg_Is_Identifier (Arg1);
7503 Check_Arg_Is_Local_Name (Arg1);
7504 Ent := Entity (Expression (Arg1));
7506 -- Pragma Implemented_By_Entry must be applied only to protected
7507 -- synchronized or task interface primitives.
7509 if (Ekind (Ent) /= E_Function
7510 and then Ekind (Ent) /= E_Procedure)
7511 or else not Present (First_Formal (Ent))
7512 or else not Is_Concurrent_Interface (Etype (First_Formal (Ent)))
7515 ("pragma % must be applied to a concurrent interface " &
7519 if Einfo.Implemented_By_Entry (Ent)
7520 and then Warn_On_Redundant_Constructs
7522 Error_Pragma ("?duplicate pragma%!");
7524 Set_Implemented_By_Entry (Ent);
7527 end Implemented_By_Entry;
7529 -----------------------
7530 -- Implicit_Packing --
7531 -----------------------
7533 -- pragma Implicit_Packing;
7535 when Pragma_Implicit_Packing =>
7537 Check_Arg_Count (0);
7538 Implicit_Packing := True;
7545 -- [Convention =>] convention_IDENTIFIER,
7546 -- [Entity =>] local_NAME
7547 -- [, [External_Name =>] static_string_EXPRESSION ]
7548 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7550 when Pragma_Import =>
7551 Check_Ada_83_Warning;
7557 Check_At_Least_N_Arguments (2);
7558 Check_At_Most_N_Arguments (4);
7559 Process_Import_Or_Interface;
7561 ----------------------
7562 -- Import_Exception --
7563 ----------------------
7565 -- pragma Import_Exception (
7566 -- [Internal =>] LOCAL_NAME
7567 -- [, [External =>] EXTERNAL_SYMBOL]
7568 -- [, [Form =>] Ada | VMS]
7569 -- [, [Code =>] static_integer_EXPRESSION]);
7571 when Pragma_Import_Exception => Import_Exception : declare
7572 Args : Args_List (1 .. 4);
7573 Names : constant Name_List (1 .. 4) := (
7579 Internal : Node_Id renames Args (1);
7580 External : Node_Id renames Args (2);
7581 Form : Node_Id renames Args (3);
7582 Code : Node_Id renames Args (4);
7586 Gather_Associations (Names, Args);
7588 if Present (External) and then Present (Code) then
7590 ("cannot give both External and Code options for pragma%");
7593 Process_Extended_Import_Export_Exception_Pragma (
7594 Arg_Internal => Internal,
7595 Arg_External => External,
7599 if not Is_VMS_Exception (Entity (Internal)) then
7600 Set_Imported (Entity (Internal));
7602 end Import_Exception;
7604 ---------------------
7605 -- Import_Function --
7606 ---------------------
7608 -- pragma Import_Function (
7609 -- [Internal =>] LOCAL_NAME,
7610 -- [, [External =>] EXTERNAL_SYMBOL]
7611 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7612 -- [, [Result_Type =>] SUBTYPE_MARK]
7613 -- [, [Mechanism =>] MECHANISM]
7614 -- [, [Result_Mechanism =>] MECHANISM_NAME]
7615 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7617 -- EXTERNAL_SYMBOL ::=
7619 -- | static_string_EXPRESSION
7621 -- PARAMETER_TYPES ::=
7623 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7625 -- TYPE_DESIGNATOR ::=
7627 -- | subtype_Name ' Access
7631 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7633 -- MECHANISM_ASSOCIATION ::=
7634 -- [formal_parameter_NAME =>] MECHANISM_NAME
7636 -- MECHANISM_NAME ::=
7639 -- | Descriptor [([Class =>] CLASS_NAME)]
7641 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7643 when Pragma_Import_Function => Import_Function : declare
7644 Args : Args_List (1 .. 7);
7645 Names : constant Name_List (1 .. 7) := (
7648 Name_Parameter_Types,
7651 Name_Result_Mechanism,
7652 Name_First_Optional_Parameter);
7654 Internal : Node_Id renames Args (1);
7655 External : Node_Id renames Args (2);
7656 Parameter_Types : Node_Id renames Args (3);
7657 Result_Type : Node_Id renames Args (4);
7658 Mechanism : Node_Id renames Args (5);
7659 Result_Mechanism : Node_Id renames Args (6);
7660 First_Optional_Parameter : Node_Id renames Args (7);
7664 Gather_Associations (Names, Args);
7665 Process_Extended_Import_Export_Subprogram_Pragma (
7666 Arg_Internal => Internal,
7667 Arg_External => External,
7668 Arg_Parameter_Types => Parameter_Types,
7669 Arg_Result_Type => Result_Type,
7670 Arg_Mechanism => Mechanism,
7671 Arg_Result_Mechanism => Result_Mechanism,
7672 Arg_First_Optional_Parameter => First_Optional_Parameter);
7673 end Import_Function;
7679 -- pragma Import_Object (
7680 -- [Internal =>] LOCAL_NAME
7681 -- [, [External =>] EXTERNAL_SYMBOL]
7682 -- [, [Size =>] EXTERNAL_SYMBOL]);
7684 -- EXTERNAL_SYMBOL ::=
7686 -- | static_string_EXPRESSION
7688 when Pragma_Import_Object => Import_Object : declare
7689 Args : Args_List (1 .. 3);
7690 Names : constant Name_List (1 .. 3) := (
7695 Internal : Node_Id renames Args (1);
7696 External : Node_Id renames Args (2);
7697 Size : Node_Id renames Args (3);
7701 Gather_Associations (Names, Args);
7702 Process_Extended_Import_Export_Object_Pragma (
7703 Arg_Internal => Internal,
7704 Arg_External => External,
7708 ----------------------
7709 -- Import_Procedure --
7710 ----------------------
7712 -- pragma Import_Procedure (
7713 -- [Internal =>] LOCAL_NAME
7714 -- [, [External =>] EXTERNAL_SYMBOL]
7715 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7716 -- [, [Mechanism =>] MECHANISM]
7717 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7719 -- EXTERNAL_SYMBOL ::=
7721 -- | static_string_EXPRESSION
7723 -- PARAMETER_TYPES ::=
7725 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7727 -- TYPE_DESIGNATOR ::=
7729 -- | subtype_Name ' Access
7733 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7735 -- MECHANISM_ASSOCIATION ::=
7736 -- [formal_parameter_NAME =>] MECHANISM_NAME
7738 -- MECHANISM_NAME ::=
7741 -- | Descriptor [([Class =>] CLASS_NAME)]
7743 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7745 when Pragma_Import_Procedure => Import_Procedure : declare
7746 Args : Args_List (1 .. 5);
7747 Names : constant Name_List (1 .. 5) := (
7750 Name_Parameter_Types,
7752 Name_First_Optional_Parameter);
7754 Internal : Node_Id renames Args (1);
7755 External : Node_Id renames Args (2);
7756 Parameter_Types : Node_Id renames Args (3);
7757 Mechanism : Node_Id renames Args (4);
7758 First_Optional_Parameter : Node_Id renames Args (5);
7762 Gather_Associations (Names, Args);
7763 Process_Extended_Import_Export_Subprogram_Pragma (
7764 Arg_Internal => Internal,
7765 Arg_External => External,
7766 Arg_Parameter_Types => Parameter_Types,
7767 Arg_Mechanism => Mechanism,
7768 Arg_First_Optional_Parameter => First_Optional_Parameter);
7769 end Import_Procedure;
7771 -----------------------------
7772 -- Import_Valued_Procedure --
7773 -----------------------------
7775 -- pragma Import_Valued_Procedure (
7776 -- [Internal =>] LOCAL_NAME
7777 -- [, [External =>] EXTERNAL_SYMBOL]
7778 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7779 -- [, [Mechanism =>] MECHANISM]
7780 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7782 -- EXTERNAL_SYMBOL ::=
7784 -- | static_string_EXPRESSION
7786 -- PARAMETER_TYPES ::=
7788 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7790 -- TYPE_DESIGNATOR ::=
7792 -- | subtype_Name ' Access
7796 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7798 -- MECHANISM_ASSOCIATION ::=
7799 -- [formal_parameter_NAME =>] MECHANISM_NAME
7801 -- MECHANISM_NAME ::=
7804 -- | Descriptor [([Class =>] CLASS_NAME)]
7806 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7808 when Pragma_Import_Valued_Procedure =>
7809 Import_Valued_Procedure : declare
7810 Args : Args_List (1 .. 5);
7811 Names : constant Name_List (1 .. 5) := (
7814 Name_Parameter_Types,
7816 Name_First_Optional_Parameter);
7818 Internal : Node_Id renames Args (1);
7819 External : Node_Id renames Args (2);
7820 Parameter_Types : Node_Id renames Args (3);
7821 Mechanism : Node_Id renames Args (4);
7822 First_Optional_Parameter : Node_Id renames Args (5);
7826 Gather_Associations (Names, Args);
7827 Process_Extended_Import_Export_Subprogram_Pragma (
7828 Arg_Internal => Internal,
7829 Arg_External => External,
7830 Arg_Parameter_Types => Parameter_Types,
7831 Arg_Mechanism => Mechanism,
7832 Arg_First_Optional_Parameter => First_Optional_Parameter);
7833 end Import_Valued_Procedure;
7835 ------------------------
7836 -- Initialize_Scalars --
7837 ------------------------
7839 -- pragma Initialize_Scalars;
7841 when Pragma_Initialize_Scalars =>
7843 Check_Arg_Count (0);
7844 Check_Valid_Configuration_Pragma;
7845 Check_Restriction (No_Initialize_Scalars, N);
7847 if not Restriction_Active (No_Initialize_Scalars) then
7848 Init_Or_Norm_Scalars := True;
7849 Initialize_Scalars := True;
7856 -- pragma Inline ( NAME {, NAME} );
7858 when Pragma_Inline =>
7860 -- Pragma is active if inlining option is active
7862 Process_Inline (Inline_Active);
7868 -- pragma Inline_Always ( NAME {, NAME} );
7870 when Pragma_Inline_Always =>
7872 Process_Inline (True);
7874 --------------------
7875 -- Inline_Generic --
7876 --------------------
7878 -- pragma Inline_Generic (NAME {, NAME});
7880 when Pragma_Inline_Generic =>
7882 Process_Generic_List;
7884 ----------------------
7885 -- Inspection_Point --
7886 ----------------------
7888 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
7890 when Pragma_Inspection_Point => Inspection_Point : declare
7895 if Arg_Count > 0 then
7898 Exp := Expression (Arg);
7901 if not Is_Entity_Name (Exp)
7902 or else not Is_Object (Entity (Exp))
7904 Error_Pragma_Arg ("object name required", Arg);
7911 end Inspection_Point;
7917 -- pragma Interface (
7918 -- [ Convention =>] convention_IDENTIFIER,
7919 -- [ Entity =>] local_NAME
7920 -- [, [External_Name =>] static_string_EXPRESSION ]
7921 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7923 when Pragma_Interface =>
7930 Check_At_Least_N_Arguments (2);
7931 Check_At_Most_N_Arguments (4);
7932 Process_Import_Or_Interface;
7934 --------------------
7935 -- Interface_Name --
7936 --------------------
7938 -- pragma Interface_Name (
7939 -- [ Entity =>] local_NAME
7940 -- [,[External_Name =>] static_string_EXPRESSION ]
7941 -- [,[Link_Name =>] static_string_EXPRESSION ]);
7943 when Pragma_Interface_Name => Interface_Name : declare
7952 ((Name_Entity, Name_External_Name, Name_Link_Name));
7953 Check_At_Least_N_Arguments (2);
7954 Check_At_Most_N_Arguments (3);
7955 Id := Expression (Arg1);
7958 if not Is_Entity_Name (Id) then
7960 ("first argument for pragma% must be entity name", Arg1);
7961 elsif Etype (Id) = Any_Type then
7964 Def_Id := Entity (Id);
7967 -- Special DEC-compatible processing for the object case, forces
7968 -- object to be imported.
7970 if Ekind (Def_Id) = E_Variable then
7971 Kill_Size_Check_Code (Def_Id);
7972 Note_Possible_Modification (Id, Sure => False);
7974 -- Initialization is not allowed for imported variable
7976 if Present (Expression (Parent (Def_Id)))
7977 and then Comes_From_Source (Expression (Parent (Def_Id)))
7979 Error_Msg_Sloc := Sloc (Def_Id);
7981 ("no initialization allowed for declaration of& #",
7985 -- For compatibility, support VADS usage of providing both
7986 -- pragmas Interface and Interface_Name to obtain the effect
7987 -- of a single Import pragma.
7989 if Is_Imported (Def_Id)
7990 and then Present (First_Rep_Item (Def_Id))
7991 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
7993 Pragma_Name (First_Rep_Item (Def_Id)) = Name_Interface
7997 Set_Imported (Def_Id);
8000 Set_Is_Public (Def_Id);
8001 Process_Interface_Name (Def_Id, Arg2, Arg3);
8004 -- Otherwise must be subprogram
8006 elsif not Is_Subprogram (Def_Id) then
8008 ("argument of pragma% is not subprogram", Arg1);
8011 Check_At_Most_N_Arguments (3);
8015 -- Loop through homonyms
8018 Def_Id := Get_Base_Subprogram (Hom_Id);
8020 if Is_Imported (Def_Id) then
8021 Process_Interface_Name (Def_Id, Arg2, Arg3);
8025 Hom_Id := Homonym (Hom_Id);
8027 exit when No (Hom_Id)
8028 or else Scope (Hom_Id) /= Current_Scope;
8033 ("argument of pragma% is not imported subprogram",
8039 -----------------------
8040 -- Interrupt_Handler --
8041 -----------------------
8043 -- pragma Interrupt_Handler (handler_NAME);
8045 when Pragma_Interrupt_Handler =>
8046 Check_Ada_83_Warning;
8047 Check_Arg_Count (1);
8048 Check_No_Identifiers;
8050 if No_Run_Time_Mode then
8051 Error_Msg_CRT ("Interrupt_Handler pragma", N);
8053 Check_Interrupt_Or_Attach_Handler;
8054 Process_Interrupt_Or_Attach_Handler;
8057 ------------------------
8058 -- Interrupt_Priority --
8059 ------------------------
8061 -- pragma Interrupt_Priority [(EXPRESSION)];
8063 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
8064 P : constant Node_Id := Parent (N);
8068 Check_Ada_83_Warning;
8070 if Arg_Count /= 0 then
8071 Arg := Expression (Arg1);
8072 Check_Arg_Count (1);
8073 Check_No_Identifiers;
8075 -- The expression must be analyzed in the special manner
8076 -- described in "Handling of Default and Per-Object
8077 -- Expressions" in sem.ads.
8079 Preanalyze_Spec_Expression (Arg, RTE (RE_Interrupt_Priority));
8082 if not Nkind_In (P, N_Task_Definition, N_Protected_Definition) then
8086 elsif Has_Priority_Pragma (P) then
8087 Error_Pragma ("duplicate pragma% not allowed");
8090 Set_Has_Priority_Pragma (P, True);
8091 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8093 end Interrupt_Priority;
8095 ---------------------
8096 -- Interrupt_State --
8097 ---------------------
8099 -- pragma Interrupt_State (
8100 -- [Name =>] INTERRUPT_ID,
8101 -- [State =>] INTERRUPT_STATE);
8103 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
8104 -- INTERRUPT_STATE => System | Runtime | User
8106 -- Note: if the interrupt id is given as an identifier, then
8107 -- it must be one of the identifiers in Ada.Interrupts.Names.
8108 -- Otherwise it is given as a static integer expression which
8109 -- must be in the range of Ada.Interrupts.Interrupt_ID.
8111 when Pragma_Interrupt_State => Interrupt_State : declare
8113 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
8114 -- This is the entity Ada.Interrupts.Interrupt_ID;
8116 State_Type : Character;
8117 -- Set to 's'/'r'/'u' for System/Runtime/User
8120 -- Index to entry in Interrupt_States table
8123 -- Value of interrupt
8125 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
8126 -- The first argument to the pragma
8128 Int_Ent : Entity_Id;
8129 -- Interrupt entity in Ada.Interrupts.Names
8133 Check_Arg_Order ((Name_Name, Name_State));
8134 Check_Arg_Count (2);
8136 Check_Optional_Identifier (Arg1, Name_Name);
8137 Check_Optional_Identifier (Arg2, Name_State);
8138 Check_Arg_Is_Identifier (Arg2);
8140 -- First argument is identifier
8142 if Nkind (Arg1X) = N_Identifier then
8144 -- Search list of names in Ada.Interrupts.Names
8146 Int_Ent := First_Entity (RTE (RE_Names));
8148 if No (Int_Ent) then
8149 Error_Pragma_Arg ("invalid interrupt name", Arg1);
8151 elsif Chars (Int_Ent) = Chars (Arg1X) then
8152 Int_Val := Expr_Value (Constant_Value (Int_Ent));
8156 Next_Entity (Int_Ent);
8159 -- First argument is not an identifier, so it must be a
8160 -- static expression of type Ada.Interrupts.Interrupt_ID.
8163 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
8164 Int_Val := Expr_Value (Arg1X);
8166 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
8168 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
8171 ("value not in range of type " &
8172 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
8178 case Chars (Get_Pragma_Arg (Arg2)) is
8179 when Name_Runtime => State_Type := 'r';
8180 when Name_System => State_Type := 's';
8181 when Name_User => State_Type := 'u';
8184 Error_Pragma_Arg ("invalid interrupt state", Arg2);
8187 -- Check if entry is already stored
8189 IST_Num := Interrupt_States.First;
8191 -- If entry not found, add it
8193 if IST_Num > Interrupt_States.Last then
8194 Interrupt_States.Append
8195 ((Interrupt_Number => UI_To_Int (Int_Val),
8196 Interrupt_State => State_Type,
8197 Pragma_Loc => Loc));
8200 -- Case of entry for the same entry
8202 elsif Int_Val = Interrupt_States.Table (IST_Num).
8205 -- If state matches, done, no need to make redundant entry
8208 State_Type = Interrupt_States.Table (IST_Num).
8211 -- Otherwise if state does not match, error
8214 Interrupt_States.Table (IST_Num).Pragma_Loc;
8216 ("state conflicts with that given #", Arg2);
8220 IST_Num := IST_Num + 1;
8222 end Interrupt_State;
8224 ----------------------
8225 -- Java_Constructor --
8226 ----------------------
8228 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
8230 -- Also handles pragma CIL_Constructor
8232 when Pragma_CIL_Constructor | Pragma_Java_Constructor =>
8233 Java_Constructor : declare
8237 Convention : Convention_Id;
8241 Check_Arg_Count (1);
8242 Check_Optional_Identifier (Arg1, Name_Entity);
8243 Check_Arg_Is_Local_Name (Arg1);
8245 Id := Expression (Arg1);
8246 Find_Program_Unit_Name (Id);
8248 -- If we did not find the name, we are done
8250 if Etype (Id) = Any_Type then
8255 when Pragma_CIL_Constructor => Convention := Convention_CIL;
8256 when Pragma_Java_Constructor => Convention := Convention_Java;
8257 when others => null;
8260 Hom_Id := Entity (Id);
8262 -- Loop through homonyms
8265 Def_Id := Get_Base_Subprogram (Hom_Id);
8267 -- The constructor is required to be a function returning an
8268 -- access type whose designated type has convention Java/CIL.
8270 if Ekind (Def_Id) = E_Function
8272 (Is_Value_Type (Etype (Def_Id))
8274 (Ekind (Etype (Def_Id)) in Access_Kind
8277 (Designated_Type (Etype (Def_Id))) = Convention
8280 (Root_Type (Designated_Type (Etype (Def_Id)))) =
8283 Set_Is_Constructor (Def_Id);
8284 Set_Convention (Def_Id, Convention);
8285 Set_Is_Imported (Def_Id);
8288 if Convention = Convention_Java then
8290 ("pragma% requires function returning a " &
8291 "'Java access type", Arg1);
8293 pragma Assert (Convention = Convention_CIL);
8295 ("pragma% requires function returning a " &
8296 "'CIL access type", Arg1);
8300 Hom_Id := Homonym (Hom_Id);
8302 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
8304 end Java_Constructor;
8306 ----------------------
8307 -- Java_Interface --
8308 ----------------------
8310 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
8312 when Pragma_Java_Interface => Java_Interface : declare
8318 Check_Arg_Count (1);
8319 Check_Optional_Identifier (Arg1, Name_Entity);
8320 Check_Arg_Is_Local_Name (Arg1);
8322 Arg := Expression (Arg1);
8325 if Etype (Arg) = Any_Type then
8329 if not Is_Entity_Name (Arg)
8330 or else not Is_Type (Entity (Arg))
8332 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
8335 Typ := Underlying_Type (Entity (Arg));
8337 -- For now we simply check some of the semantic constraints
8338 -- on the type. This currently leaves out some restrictions
8339 -- on interface types, namely that the parent type must be
8340 -- java.lang.Object.Typ and that all primitives of the type
8341 -- should be declared abstract. ???
8343 if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then
8344 Error_Pragma_Arg ("pragma% requires an abstract "
8345 & "tagged type", Arg1);
8347 elsif not Has_Discriminants (Typ)
8348 or else Ekind (Etype (First_Discriminant (Typ)))
8349 /= E_Anonymous_Access_Type
8351 not Is_Class_Wide_Type
8352 (Designated_Type (Etype (First_Discriminant (Typ))))
8355 ("type must have a class-wide access discriminant", Arg1);
8363 -- pragma Keep_Names ([On => ] local_NAME);
8365 when Pragma_Keep_Names => Keep_Names : declare
8370 Check_Arg_Count (1);
8371 Check_Optional_Identifier (Arg1, Name_On);
8372 Check_Arg_Is_Local_Name (Arg1);
8374 Arg := Expression (Arg1);
8377 if Etype (Arg) = Any_Type then
8381 if not Is_Entity_Name (Arg)
8382 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
8385 ("pragma% requires a local enumeration type", Arg1);
8388 Set_Discard_Names (Entity (Arg), False);
8395 -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
8397 when Pragma_License =>
8399 Check_Arg_Count (1);
8400 Check_No_Identifiers;
8401 Check_Valid_Configuration_Pragma;
8402 Check_Arg_Is_Identifier (Arg1);
8405 Sind : constant Source_File_Index :=
8406 Source_Index (Current_Sem_Unit);
8409 case Chars (Get_Pragma_Arg (Arg1)) is
8411 Set_License (Sind, GPL);
8413 when Name_Modified_GPL =>
8414 Set_License (Sind, Modified_GPL);
8416 when Name_Restricted =>
8417 Set_License (Sind, Restricted);
8419 when Name_Unrestricted =>
8420 Set_License (Sind, Unrestricted);
8423 Error_Pragma_Arg ("invalid license name", Arg1);
8431 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
8433 when Pragma_Link_With => Link_With : declare
8439 if Operating_Mode = Generate_Code
8440 and then In_Extended_Main_Source_Unit (N)
8442 Check_At_Least_N_Arguments (1);
8443 Check_No_Identifiers;
8444 Check_Is_In_Decl_Part_Or_Package_Spec;
8445 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8449 while Present (Arg) loop
8450 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8452 -- Store argument, converting sequences of spaces
8453 -- to a single null character (this is one of the
8454 -- differences in processing between Link_With
8455 -- and Linker_Options).
8458 C : constant Char_Code := Get_Char_Code (' ');
8459 S : constant String_Id :=
8460 Strval (Expr_Value_S (Expression (Arg)));
8461 L : constant Nat := String_Length (S);
8464 procedure Skip_Spaces;
8465 -- Advance F past any spaces
8471 procedure Skip_Spaces is
8473 while F <= L and then Get_String_Char (S, F) = C loop
8478 -- Start of processing for Arg_Store
8481 Skip_Spaces; -- skip leading spaces
8483 -- Loop through characters, changing any embedded
8484 -- sequence of spaces to a single null character
8485 -- (this is how Link_With/Linker_Options differ)
8488 if Get_String_Char (S, F) = C then
8491 Store_String_Char (ASCII.NUL);
8494 Store_String_Char (Get_String_Char (S, F));
8502 if Present (Arg) then
8503 Store_String_Char (ASCII.NUL);
8507 Store_Linker_Option_String (End_String);
8515 -- pragma Linker_Alias (
8516 -- [Entity =>] LOCAL_NAME
8517 -- [Target =>] static_string_EXPRESSION);
8519 when Pragma_Linker_Alias =>
8521 Check_Arg_Order ((Name_Entity, Name_Target));
8522 Check_Arg_Count (2);
8523 Check_Optional_Identifier (Arg1, Name_Entity);
8524 Check_Optional_Identifier (Arg2, Name_Target);
8525 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8526 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8528 -- The only processing required is to link this item on to the
8529 -- list of rep items for the given entity. This is accomplished
8530 -- by the call to Rep_Item_Too_Late (when no error is detected
8531 -- and False is returned).
8533 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8536 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8539 ------------------------
8540 -- Linker_Constructor --
8541 ------------------------
8543 -- pragma Linker_Constructor (procedure_LOCAL_NAME);
8545 -- Code is shared with Linker_Destructor
8547 -----------------------
8548 -- Linker_Destructor --
8549 -----------------------
8551 -- pragma Linker_Destructor (procedure_LOCAL_NAME);
8553 when Pragma_Linker_Constructor |
8554 Pragma_Linker_Destructor =>
8555 Linker_Constructor : declare
8561 Check_Arg_Count (1);
8562 Check_No_Identifiers;
8563 Check_Arg_Is_Local_Name (Arg1);
8564 Arg1_X := Expression (Arg1);
8566 Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
8568 if not Is_Library_Level_Entity (Proc) then
8570 ("argument for pragma% must be library level entity", Arg1);
8573 -- The only processing required is to link this item on to the
8574 -- list of rep items for the given entity. This is accomplished
8575 -- by the call to Rep_Item_Too_Late (when no error is detected
8576 -- and False is returned).
8578 if Rep_Item_Too_Late (Proc, N) then
8581 Set_Has_Gigi_Rep_Item (Proc);
8583 end Linker_Constructor;
8585 --------------------
8586 -- Linker_Options --
8587 --------------------
8589 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
8591 when Pragma_Linker_Options => Linker_Options : declare
8595 Check_Ada_83_Warning;
8596 Check_No_Identifiers;
8597 Check_Arg_Count (1);
8598 Check_Is_In_Decl_Part_Or_Package_Spec;
8599 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8600 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
8603 while Present (Arg) loop
8604 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8605 Store_String_Char (ASCII.NUL);
8606 Store_String_Chars (Strval (Expr_Value_S (Expression (Arg))));
8610 if Operating_Mode = Generate_Code
8611 and then In_Extended_Main_Source_Unit (N)
8613 Store_Linker_Option_String (End_String);
8617 --------------------
8618 -- Linker_Section --
8619 --------------------
8621 -- pragma Linker_Section (
8622 -- [Entity =>] LOCAL_NAME
8623 -- [Section =>] static_string_EXPRESSION);
8625 when Pragma_Linker_Section =>
8627 Check_Arg_Order ((Name_Entity, Name_Section));
8628 Check_Arg_Count (2);
8629 Check_Optional_Identifier (Arg1, Name_Entity);
8630 Check_Optional_Identifier (Arg2, Name_Section);
8631 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8632 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8634 -- This pragma applies only to objects
8636 if not Is_Object (Entity (Expression (Arg1))) then
8637 Error_Pragma_Arg ("pragma% applies only to objects", Arg1);
8640 -- The only processing required is to link this item on to the
8641 -- list of rep items for the given entity. This is accomplished
8642 -- by the call to Rep_Item_Too_Late (when no error is detected
8643 -- and False is returned).
8645 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8648 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8655 -- pragma List (On | Off)
8657 -- There is nothing to do here, since we did all the processing
8658 -- for this pragma in Par.Prag (so that it works properly even in
8659 -- syntax only mode)
8664 --------------------
8665 -- Locking_Policy --
8666 --------------------
8668 -- pragma Locking_Policy (policy_IDENTIFIER);
8670 when Pragma_Locking_Policy => declare
8674 Check_Ada_83_Warning;
8675 Check_Arg_Count (1);
8676 Check_No_Identifiers;
8677 Check_Arg_Is_Locking_Policy (Arg1);
8678 Check_Valid_Configuration_Pragma;
8679 Get_Name_String (Chars (Expression (Arg1)));
8680 LP := Fold_Upper (Name_Buffer (1));
8682 if Locking_Policy /= ' '
8683 and then Locking_Policy /= LP
8685 Error_Msg_Sloc := Locking_Policy_Sloc;
8686 Error_Pragma ("locking policy incompatible with policy#");
8688 -- Set new policy, but always preserve System_Location since
8689 -- we like the error message with the run time name.
8692 Locking_Policy := LP;
8694 if Locking_Policy_Sloc /= System_Location then
8695 Locking_Policy_Sloc := Loc;
8704 -- pragma Long_Float (D_Float | G_Float);
8706 when Pragma_Long_Float =>
8708 Check_Valid_Configuration_Pragma;
8709 Check_Arg_Count (1);
8710 Check_No_Identifier (Arg1);
8711 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
8713 if not OpenVMS_On_Target then
8714 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
8719 if Chars (Expression (Arg1)) = Name_D_Float then
8720 if Opt.Float_Format_Long = 'G' then
8721 Error_Pragma ("G_Float previously specified");
8724 Opt.Float_Format_Long := 'D';
8726 -- G_Float case (this is the default, does not need overriding)
8729 if Opt.Float_Format_Long = 'D' then
8730 Error_Pragma ("D_Float previously specified");
8733 Opt.Float_Format_Long := 'G';
8736 Set_Standard_Fpt_Formats;
8738 -----------------------
8739 -- Machine_Attribute --
8740 -----------------------
8742 -- pragma Machine_Attribute (
8743 -- [Entity =>] LOCAL_NAME,
8744 -- [Attribute_Name =>] static_string_EXPRESSION
8745 -- [, [Info =>] static_string_EXPRESSION] );
8747 when Pragma_Machine_Attribute => Machine_Attribute : declare
8752 Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
8754 if Arg_Count = 3 then
8755 Check_Optional_Identifier (Arg3, Name_Info);
8756 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
8758 Check_Arg_Count (2);
8761 Check_Optional_Identifier (Arg1, Name_Entity);
8762 Check_Optional_Identifier (Arg2, Name_Attribute_Name);
8763 Check_Arg_Is_Local_Name (Arg1);
8764 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8765 Def_Id := Entity (Expression (Arg1));
8767 if Is_Access_Type (Def_Id) then
8768 Def_Id := Designated_Type (Def_Id);
8771 if Rep_Item_Too_Early (Def_Id, N) then
8775 Def_Id := Underlying_Type (Def_Id);
8777 -- The only processing required is to link this item on to the
8778 -- list of rep items for the given entity. This is accomplished
8779 -- by the call to Rep_Item_Too_Late (when no error is detected
8780 -- and False is returned).
8782 if Rep_Item_Too_Late (Def_Id, N) then
8785 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8787 end Machine_Attribute;
8794 -- (MAIN_OPTION [, MAIN_OPTION]);
8797 -- [STACK_SIZE =>] static_integer_EXPRESSION
8798 -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION
8799 -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION
8801 when Pragma_Main => Main : declare
8802 Args : Args_List (1 .. 3);
8803 Names : constant Name_List (1 .. 3) := (
8805 Name_Task_Stack_Size_Default,
8806 Name_Time_Slicing_Enabled);
8812 Gather_Associations (Names, Args);
8814 for J in 1 .. 2 loop
8815 if Present (Args (J)) then
8816 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8820 if Present (Args (3)) then
8821 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
8825 while Present (Nod) loop
8826 if Nkind (Nod) = N_Pragma
8827 and then Pragma_Name (Nod) = Name_Main
8829 Error_Msg_Name_1 := Pname;
8830 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8841 -- pragma Main_Storage
8842 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
8844 -- MAIN_STORAGE_OPTION ::=
8845 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
8846 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
8848 when Pragma_Main_Storage => Main_Storage : declare
8849 Args : Args_List (1 .. 2);
8850 Names : constant Name_List (1 .. 2) := (
8851 Name_Working_Storage,
8858 Gather_Associations (Names, Args);
8860 for J in 1 .. 2 loop
8861 if Present (Args (J)) then
8862 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8866 Check_In_Main_Program;
8869 while Present (Nod) loop
8870 if Nkind (Nod) = N_Pragma
8871 and then Pragma_Name (Nod) = Name_Main_Storage
8873 Error_Msg_Name_1 := Pname;
8874 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8885 -- pragma Memory_Size (NUMERIC_LITERAL)
8887 when Pragma_Memory_Size =>
8890 -- Memory size is simply ignored
8892 Check_No_Identifiers;
8893 Check_Arg_Count (1);
8894 Check_Arg_Is_Integer_Literal (Arg1);
8902 -- The only correct use of this pragma is on its own in a file, in
8903 -- which case it is specially processed (see Gnat1drv.Check_Bad_Body
8904 -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to
8905 -- check for a file containing nothing but a No_Body pragma). If we
8906 -- attempt to process it during normal semantics processing, it means
8907 -- it was misplaced.
8909 when Pragma_No_Body =>
8917 -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
8919 when Pragma_No_Return => No_Return : declare
8927 Check_At_Least_N_Arguments (1);
8929 -- Loop through arguments of pragma
8932 while Present (Arg) loop
8933 Check_Arg_Is_Local_Name (Arg);
8934 Id := Expression (Arg);
8937 if not Is_Entity_Name (Id) then
8938 Error_Pragma_Arg ("entity name required", Arg);
8941 if Etype (Id) = Any_Type then
8945 -- Loop to find matching procedures
8950 and then Scope (E) = Current_Scope
8952 if Ekind (E) = E_Procedure
8953 or else Ekind (E) = E_Generic_Procedure
8957 -- Set flag on any alias as well
8959 if Is_Overloadable (E) and then Present (Alias (E)) then
8960 Set_No_Return (Alias (E));
8970 Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
8981 -- pragma No_Run_Time;
8983 -- Note: this pragma is retained for backwards compatibility.
8984 -- See body of Rtsfind for full details on its handling.
8986 when Pragma_No_Run_Time =>
8988 Check_Valid_Configuration_Pragma;
8989 Check_Arg_Count (0);
8991 No_Run_Time_Mode := True;
8992 Configurable_Run_Time_Mode := True;
8994 -- Set Duration to 32 bits if word size is 32
8996 if Ttypes.System_Word_Size = 32 then
8997 Duration_32_Bits_On_Target := True;
9000 -- Set appropriate restrictions
9002 Set_Restriction (No_Finalization, N);
9003 Set_Restriction (No_Exception_Handlers, N);
9004 Set_Restriction (Max_Tasks, N, 0);
9005 Set_Restriction (No_Tasking, N);
9007 ------------------------
9008 -- No_Strict_Aliasing --
9009 ------------------------
9011 -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
9013 when Pragma_No_Strict_Aliasing => No_Strict_Aliasing : declare
9018 Check_At_Most_N_Arguments (1);
9020 if Arg_Count = 0 then
9021 Check_Valid_Configuration_Pragma;
9022 Opt.No_Strict_Aliasing := True;
9025 Check_Optional_Identifier (Arg2, Name_Entity);
9026 Check_Arg_Is_Local_Name (Arg1);
9027 E_Id := Entity (Expression (Arg1));
9029 if E_Id = Any_Type then
9031 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
9032 Error_Pragma_Arg ("pragma% requires access type", Arg1);
9035 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
9037 end No_Strict_Aliasing;
9039 -----------------------
9040 -- Normalize_Scalars --
9041 -----------------------
9043 -- pragma Normalize_Scalars;
9045 when Pragma_Normalize_Scalars =>
9046 Check_Ada_83_Warning;
9047 Check_Arg_Count (0);
9048 Check_Valid_Configuration_Pragma;
9049 Normalize_Scalars := True;
9050 Init_Or_Norm_Scalars := True;
9056 -- pragma Obsolescent;
9058 -- pragma Obsolescent (
9059 -- [Message =>] static_string_EXPRESSION
9060 -- [,[Version =>] Ada_05]]);
9062 -- pragma Obsolescent (
9064 -- [,[Message =>] static_string_EXPRESSION
9065 -- [,[Version =>] Ada_05]] );
9067 when Pragma_Obsolescent => Obsolescent : declare
9071 procedure Set_Obsolescent (E : Entity_Id);
9072 -- Given an entity Ent, mark it as obsolescent if appropriate
9074 ---------------------
9075 -- Set_Obsolescent --
9076 ---------------------
9078 procedure Set_Obsolescent (E : Entity_Id) is
9087 -- Entity name was given
9089 if Present (Ename) then
9091 -- If entity name matches, we are fine
9092 -- Save entity in pragma argument, for ASIS use.
9094 if Chars (Ename) = Chars (Ent) then
9095 Set_Entity (Ename, Ent);
9096 Generate_Reference (Ent, Ename);
9098 -- If entity name does not match, only possibility is an
9099 -- enumeration literal from an enumeration type declaration.
9101 elsif Ekind (Ent) /= E_Enumeration_Type then
9103 ("pragma % entity name does not match declaration");
9106 Ent := First_Literal (E);
9110 ("pragma % entity name does not match any " &
9111 "enumeration literal");
9113 elsif Chars (Ent) = Chars (Ename) then
9114 Set_Entity (Ename, Ent);
9115 Generate_Reference (Ent, Ename);
9119 Ent := Next_Literal (Ent);
9125 -- Ent points to entity to be marked
9127 if Arg_Count >= 1 then
9129 -- Deal with static string argument
9131 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
9132 S := Strval (Expression (Arg1));
9134 for J in 1 .. String_Length (S) loop
9135 if not In_Character_Range (Get_String_Char (S, J)) then
9137 ("pragma% argument does not allow wide characters",
9142 Obsolescent_Warnings.Append
9143 ((Ent => Ent, Msg => Strval (Expression (Arg1))));
9145 -- Check for Ada_05 parameter
9147 if Arg_Count /= 1 then
9148 Check_Arg_Count (2);
9151 Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
9154 Check_Arg_Is_Identifier (Argx);
9156 if Chars (Argx) /= Name_Ada_05 then
9157 Error_Msg_Name_2 := Name_Ada_05;
9159 ("only allowed argument for pragma% is %", Argx);
9162 if Ada_Version_Explicit < Ada_05
9163 or else not Warn_On_Ada_2005_Compatibility
9171 -- Set flag if pragma active
9174 Set_Is_Obsolescent (Ent);
9178 end Set_Obsolescent;
9180 -- Start of processing for pragma Obsolescent
9185 Check_At_Most_N_Arguments (3);
9187 -- See if first argument specifies an entity name
9191 (Chars (Arg1) = Name_Entity
9193 Nkind_In (Get_Pragma_Arg (Arg1), N_Character_Literal,
9197 Ename := Get_Pragma_Arg (Arg1);
9199 -- Eliminate first argument, so we can share processing
9203 Arg_Count := Arg_Count - 1;
9205 -- No Entity name argument given
9211 if Arg_Count >= 1 then
9212 Check_Optional_Identifier (Arg1, Name_Message);
9214 if Arg_Count = 2 then
9215 Check_Optional_Identifier (Arg2, Name_Version);
9219 -- Get immediately preceding declaration
9222 while Present (Decl) and then Nkind (Decl) = N_Pragma loop
9226 -- Cases where we do not follow anything other than another pragma
9230 -- First case: library level compilation unit declaration with
9231 -- the pragma immediately following the declaration.
9233 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
9235 (Defining_Entity (Unit (Parent (Parent (N)))));
9238 -- Case 2: library unit placement for package
9242 Ent : constant Entity_Id := Find_Lib_Unit_Name;
9244 if Is_Package_Or_Generic_Package (Ent) then
9245 Set_Obsolescent (Ent);
9251 -- Cases where we must follow a declaration
9254 if Nkind (Decl) not in N_Declaration
9255 and then Nkind (Decl) not in N_Later_Decl_Item
9256 and then Nkind (Decl) not in N_Generic_Declaration
9259 ("pragma% misplaced, "
9260 & "must immediately follow a declaration");
9263 Set_Obsolescent (Defining_Entity (Decl));
9273 -- pragma Optimize (Time | Space | Off);
9275 -- The actual check for optimize is done in Gigi. Note that this
9276 -- pragma does not actually change the optimization setting, it
9277 -- simply checks that it is consistent with the pragma.
9279 when Pragma_Optimize =>
9280 Check_No_Identifiers;
9281 Check_Arg_Count (1);
9282 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
9284 ------------------------
9285 -- Optimize_Alignment --
9286 ------------------------
9288 -- pragma Optimize_Alignment (Time | Space | Off);
9290 when Pragma_Optimize_Alignment =>
9292 Check_No_Identifiers;
9293 Check_Arg_Count (1);
9294 Check_Valid_Configuration_Pragma;
9297 Nam : constant Name_Id := Chars (Get_Pragma_Arg (Arg1));
9301 Opt.Optimize_Alignment := 'T';
9303 Opt.Optimize_Alignment := 'S';
9305 Opt.Optimize_Alignment := 'O';
9307 Error_Pragma_Arg ("invalid argument for pragma%", Arg1);
9311 -- Set indication that mode is set locally. If we are in fact in a
9312 -- configuration pragma file, this setting is harmless since the
9313 -- switch will get reset anyway at the start of each unit.
9315 Optimize_Alignment_Local := True;
9321 -- pragma Pack (first_subtype_LOCAL_NAME);
9323 when Pragma_Pack => Pack : declare
9324 Assoc : constant Node_Id := Arg1;
9329 Check_No_Identifiers;
9330 Check_Arg_Count (1);
9331 Check_Arg_Is_Local_Name (Arg1);
9333 Type_Id := Expression (Assoc);
9334 Find_Type (Type_Id);
9335 Typ := Entity (Type_Id);
9338 or else Rep_Item_Too_Early (Typ, N)
9342 Typ := Underlying_Type (Typ);
9345 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
9346 Error_Pragma ("pragma% must specify array or record type");
9349 Check_First_Subtype (Arg1);
9351 if Has_Pragma_Pack (Typ) then
9352 Error_Pragma ("duplicate pragma%, only one allowed");
9356 elsif Is_Array_Type (Typ) then
9358 -- Pack not allowed for aliased or atomic components
9360 if Has_Aliased_Components (Base_Type (Typ)) then
9362 ("pragma% ignored, cannot pack aliased components?");
9364 elsif Has_Atomic_Components (Typ)
9365 or else Is_Atomic (Component_Type (Typ))
9368 ("?pragma% ignored, cannot pack atomic components");
9371 -- If we had an explicit component size given, then we do not
9372 -- let Pack override this given size. We also give a warning
9373 -- that Pack is being ignored unless we can tell for sure that
9374 -- the Pack would not have had any effect anyway.
9376 if Has_Component_Size_Clause (Typ) then
9377 if Known_Static_RM_Size (Component_Type (Typ))
9379 RM_Size (Component_Type (Typ)) = Component_Size (Typ)
9384 ("?pragma% ignored, explicit component size given");
9387 -- If no prior array component size given, Pack is effective
9390 if not Rep_Item_Too_Late (Typ, N) then
9391 if VM_Target = No_VM then
9392 Set_Is_Packed (Base_Type (Typ));
9393 elsif not GNAT_Mode then
9395 ("?pragma% ignored in this configuration");
9398 Set_Has_Pragma_Pack (Base_Type (Typ));
9399 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9403 -- For record types, the pack is always effective
9405 else pragma Assert (Is_Record_Type (Typ));
9406 if not Rep_Item_Too_Late (Typ, N) then
9407 if VM_Target = No_VM then
9408 Set_Is_Packed (Base_Type (Typ));
9409 elsif not GNAT_Mode then
9410 Error_Pragma ("?pragma% ignored in this configuration");
9413 Set_Has_Pragma_Pack (Base_Type (Typ));
9414 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9425 -- There is nothing to do here, since we did all the processing
9426 -- for this pragma in Par.Prag (so that it works properly even in
9427 -- syntax only mode)
9436 -- pragma Passive [(PASSIVE_FORM)];
9438 -- PASSIVE_FORM ::= Semaphore | No
9440 when Pragma_Passive =>
9443 if Nkind (Parent (N)) /= N_Task_Definition then
9444 Error_Pragma ("pragma% must be within task definition");
9447 if Arg_Count /= 0 then
9448 Check_Arg_Count (1);
9449 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
9452 ----------------------------------
9453 -- Preelaborable_Initialization --
9454 ----------------------------------
9456 -- pragma Preelaborable_Initialization (DIRECT_NAME);
9458 when Pragma_Preelaborable_Initialization => Preelab_Init : declare
9463 Check_Arg_Count (1);
9464 Check_No_Identifiers;
9465 Check_Arg_Is_Identifier (Arg1);
9466 Check_Arg_Is_Local_Name (Arg1);
9467 Check_First_Subtype (Arg1);
9468 Ent := Entity (Expression (Arg1));
9470 if not Is_Private_Type (Ent)
9471 and then not Is_Protected_Type (Ent)
9474 ("pragma % can only be applied to private or protected type",
9478 -- Give an error if the pragma is applied to a protected type that
9479 -- does not qualify (due to having entries, or due to components
9480 -- that do not qualify).
9482 if Is_Protected_Type (Ent)
9483 and then not Has_Preelaborable_Initialization (Ent)
9486 ("protected type & does not have preelaborable " &
9487 "initialization", Ent);
9489 -- Otherwise mark the type as definitely having preelaborable
9493 Set_Known_To_Have_Preelab_Init (Ent);
9496 if Has_Pragma_Preelab_Init (Ent)
9497 and then Warn_On_Redundant_Constructs
9499 Error_Pragma ("?duplicate pragma%!");
9501 Set_Has_Pragma_Preelab_Init (Ent);
9505 --------------------
9506 -- Persistent_BSS --
9507 --------------------
9509 when Pragma_Persistent_BSS => Persistent_BSS : declare
9516 Check_At_Most_N_Arguments (1);
9518 -- Case of application to specific object (one argument)
9520 if Arg_Count = 1 then
9521 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9523 if not Is_Entity_Name (Expression (Arg1))
9525 (Ekind (Entity (Expression (Arg1))) /= E_Variable
9526 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
9528 Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
9531 Ent := Entity (Expression (Arg1));
9532 Decl := Parent (Ent);
9534 if Rep_Item_Too_Late (Ent, N) then
9538 if Present (Expression (Decl)) then
9540 ("object for pragma% cannot have initialization", Arg1);
9543 if not Is_Potentially_Persistent_Type (Etype (Ent)) then
9545 ("object type for pragma% is not potentially persistent",
9550 Make_Linker_Section_Pragma
9551 (Ent, Sloc (N), ".persistent.bss");
9552 Insert_After (N, Prag);
9555 -- Case of use as configuration pragma with no arguments
9558 Check_Valid_Configuration_Pragma;
9559 Persistent_BSS_Mode := True;
9567 -- pragma Polling (ON | OFF);
9569 when Pragma_Polling =>
9571 Check_Arg_Count (1);
9572 Check_No_Identifiers;
9573 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9574 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
9580 -- pragma Postcondition ([Check =>] Boolean_Expression
9581 -- [,[Message =>] String_Expression]);
9583 when Pragma_Postcondition => Postcondition : declare
9585 pragma Warnings (Off, In_Body);
9589 Check_At_Least_N_Arguments (1);
9590 Check_At_Most_N_Arguments (2);
9591 Check_Optional_Identifier (Arg1, Name_Check);
9593 -- All we need to do here is call the common check procedure,
9594 -- the remainder of the processing is found in Sem_Ch6/Sem_Ch7.
9596 Check_Precondition_Postcondition (In_Body);
9603 -- pragma Precondition ([Check =>] Boolean_Expression
9604 -- [,[Message =>] String_Expression]);
9606 when Pragma_Precondition => Precondition : declare
9611 Check_At_Least_N_Arguments (1);
9612 Check_At_Most_N_Arguments (2);
9613 Check_Optional_Identifier (Arg1, Name_Check);
9615 Check_Precondition_Postcondition (In_Body);
9617 -- If in spec, nothing to do. If in body, then we convert the
9618 -- pragma to pragma Check (Precondition, cond [, msg]). Note we
9619 -- do this whether or not precondition checks are enabled. That
9620 -- works fine since pragma Check will do this check.
9623 if Arg_Count = 2 then
9624 Check_Optional_Identifier (Arg3, Name_Message);
9625 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
9628 Analyze_And_Resolve (Get_Pragma_Arg (Arg1), Standard_Boolean);
9632 Chars => Name_Check,
9633 Pragma_Argument_Associations => New_List (
9634 Make_Pragma_Argument_Association (Loc,
9636 Make_Identifier (Loc,
9637 Chars => Name_Precondition)),
9639 Make_Pragma_Argument_Association (Sloc (Arg1),
9640 Expression => Relocate_Node (Get_Pragma_Arg (Arg1))))));
9642 if Arg_Count = 2 then
9643 Append_To (Pragma_Argument_Associations (N),
9644 Make_Pragma_Argument_Association (Sloc (Arg2),
9645 Expression => Relocate_Node (Get_Pragma_Arg (Arg2))));
9656 -- pragma Preelaborate [(library_unit_NAME)];
9658 -- Set the flag Is_Preelaborated of program unit name entity
9660 when Pragma_Preelaborate => Preelaborate : declare
9661 Pa : constant Node_Id := Parent (N);
9662 Pk : constant Node_Kind := Nkind (Pa);
9666 Check_Ada_83_Warning;
9667 Check_Valid_Library_Unit_Pragma;
9669 if Nkind (N) = N_Null_Statement then
9673 Ent := Find_Lib_Unit_Name;
9675 -- This filters out pragmas inside generic parent then
9676 -- show up inside instantiation
9679 and then not (Pk = N_Package_Specification
9680 and then Present (Generic_Parent (Pa)))
9682 if not Debug_Flag_U then
9683 Set_Is_Preelaborated (Ent);
9684 Set_Suppress_Elaboration_Warnings (Ent);
9689 ---------------------
9690 -- Preelaborate_05 --
9691 ---------------------
9693 -- pragma Preelaborate_05 [(library_unit_NAME)];
9695 -- This pragma is useable only in GNAT_Mode, where it is used like
9696 -- pragma Preelaborate but it is only effective in Ada 2005 mode
9697 -- (otherwise it is ignored). This is used to implement AI-362 which
9698 -- recategorizes some run-time packages in Ada 2005 mode.
9700 when Pragma_Preelaborate_05 => Preelaborate_05 : declare
9705 Check_Valid_Library_Unit_Pragma;
9707 if not GNAT_Mode then
9708 Error_Pragma ("pragma% only available in GNAT mode");
9711 if Nkind (N) = N_Null_Statement then
9715 -- This is one of the few cases where we need to test the value of
9716 -- Ada_Version_Explicit rather than Ada_Version (which is always
9717 -- set to Ada_05 in a predefined unit), we need to know the
9718 -- explicit version set to know if this pragma is active.
9720 if Ada_Version_Explicit >= Ada_05 then
9721 Ent := Find_Lib_Unit_Name;
9722 Set_Is_Preelaborated (Ent);
9723 Set_Suppress_Elaboration_Warnings (Ent);
9725 end Preelaborate_05;
9731 -- pragma Priority (EXPRESSION);
9733 when Pragma_Priority => Priority : declare
9734 P : constant Node_Id := Parent (N);
9738 Check_No_Identifiers;
9739 Check_Arg_Count (1);
9743 if Nkind (P) = N_Subprogram_Body then
9744 Check_In_Main_Program;
9746 Arg := Expression (Arg1);
9747 Analyze_And_Resolve (Arg, Standard_Integer);
9751 if not Is_Static_Expression (Arg) then
9752 Flag_Non_Static_Expr
9753 ("main subprogram priority is not static!", Arg);
9756 -- If constraint error, then we already signalled an error
9758 elsif Raises_Constraint_Error (Arg) then
9761 -- Otherwise check in range
9765 Val : constant Uint := Expr_Value (Arg);
9769 or else Val > Expr_Value (Expression
9770 (Parent (RTE (RE_Max_Priority))))
9773 ("main subprogram priority is out of range", Arg1);
9779 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
9781 -- Load an arbitrary entity from System.Tasking to make sure
9782 -- this package is implicitly with'ed, since we need to have
9783 -- the tasking run-time active for the pragma Priority to have
9787 Discard : Entity_Id;
9788 pragma Warnings (Off, Discard);
9790 Discard := RTE (RE_Task_List);
9793 -- Task or Protected, must be of type Integer
9795 elsif Nkind_In (P, N_Protected_Definition, N_Task_Definition) then
9796 Arg := Expression (Arg1);
9798 -- The expression must be analyzed in the special manner
9799 -- described in "Handling of Default and Per-Object
9800 -- Expressions" in sem.ads.
9802 Preanalyze_Spec_Expression (Arg, Standard_Integer);
9804 if not Is_Static_Expression (Arg) then
9805 Check_Restriction (Static_Priorities, Arg);
9808 -- Anything else is incorrect
9814 if Has_Priority_Pragma (P) then
9815 Error_Pragma ("duplicate pragma% not allowed");
9817 Set_Has_Priority_Pragma (P, True);
9819 if Nkind_In (P, N_Protected_Definition, N_Task_Definition) then
9820 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9821 -- exp_ch9 should use this ???
9826 -----------------------------------
9827 -- Priority_Specific_Dispatching --
9828 -----------------------------------
9830 -- pragma Priority_Specific_Dispatching (
9831 -- policy_IDENTIFIER,
9832 -- first_priority_EXPRESSION,
9833 -- last_priority_EXPRESSION);
9835 when Pragma_Priority_Specific_Dispatching =>
9836 Priority_Specific_Dispatching : declare
9837 Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
9838 -- This is the entity System.Any_Priority;
9841 Lower_Bound : Node_Id;
9842 Upper_Bound : Node_Id;
9848 Check_Arg_Count (3);
9849 Check_No_Identifiers;
9850 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9851 Check_Valid_Configuration_Pragma;
9852 Get_Name_String (Chars (Expression (Arg1)));
9853 DP := Fold_Upper (Name_Buffer (1));
9855 Lower_Bound := Expression (Arg2);
9856 Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
9857 Lower_Val := Expr_Value (Lower_Bound);
9859 Upper_Bound := Expression (Arg3);
9860 Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
9861 Upper_Val := Expr_Value (Upper_Bound);
9863 -- It is not allowed to use Task_Dispatching_Policy and
9864 -- Priority_Specific_Dispatching in the same partition.
9866 if Task_Dispatching_Policy /= ' ' then
9867 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9869 ("pragma% incompatible with Task_Dispatching_Policy#");
9871 -- Check lower bound in range
9873 elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9875 Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
9878 ("first_priority is out of range", Arg2);
9880 -- Check upper bound in range
9882 elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9884 Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
9887 ("last_priority is out of range", Arg3);
9889 -- Check that the priority range is valid
9891 elsif Lower_Val > Upper_Val then
9893 ("last_priority_expression must be greater than" &
9894 " or equal to first_priority_expression");
9896 -- Store the new policy, but always preserve System_Location since
9897 -- we like the error message with the run-time name.
9900 -- Check overlapping in the priority ranges specified in other
9901 -- Priority_Specific_Dispatching pragmas within the same
9902 -- partition. We can only check those we know about!
9905 Specific_Dispatching.First .. Specific_Dispatching.Last
9907 if Specific_Dispatching.Table (J).First_Priority in
9908 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9909 or else Specific_Dispatching.Table (J).Last_Priority in
9910 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9913 Specific_Dispatching.Table (J).Pragma_Loc;
9915 ("priority range overlaps with "
9916 & "Priority_Specific_Dispatching#");
9920 -- The use of Priority_Specific_Dispatching is incompatible
9921 -- with Task_Dispatching_Policy.
9923 if Task_Dispatching_Policy /= ' ' then
9924 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9926 ("Priority_Specific_Dispatching incompatible "
9927 & "with Task_Dispatching_Policy#");
9930 -- The use of Priority_Specific_Dispatching forces ceiling
9933 if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
9934 Error_Msg_Sloc := Locking_Policy_Sloc;
9936 ("Priority_Specific_Dispatching incompatible "
9937 & "with Locking_Policy#");
9939 -- Set the Ceiling_Locking policy, but preserve System_Location
9940 -- since we like the error message with the run time name.
9943 Locking_Policy := 'C';
9945 if Locking_Policy_Sloc /= System_Location then
9946 Locking_Policy_Sloc := Loc;
9950 -- Add entry in the table
9952 Specific_Dispatching.Append
9953 ((Dispatching_Policy => DP,
9954 First_Priority => UI_To_Int (Lower_Val),
9955 Last_Priority => UI_To_Int (Upper_Val),
9956 Pragma_Loc => Loc));
9958 end Priority_Specific_Dispatching;
9964 -- pragma Profile (profile_IDENTIFIER);
9966 -- profile_IDENTIFIER => Restricted | Ravenscar
9968 when Pragma_Profile =>
9970 Check_Arg_Count (1);
9971 Check_Valid_Configuration_Pragma;
9972 Check_No_Identifiers;
9975 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9977 if Chars (Argx) = Name_Ravenscar then
9978 Set_Ravenscar_Profile (N);
9979 elsif Chars (Argx) = Name_Restricted then
9980 Set_Profile_Restrictions
9981 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
9983 Error_Pragma_Arg ("& is not a valid profile", Argx);
9987 ----------------------
9988 -- Profile_Warnings --
9989 ----------------------
9991 -- pragma Profile_Warnings (profile_IDENTIFIER);
9993 -- profile_IDENTIFIER => Restricted | Ravenscar
9995 when Pragma_Profile_Warnings =>
9997 Check_Arg_Count (1);
9998 Check_Valid_Configuration_Pragma;
9999 Check_No_Identifiers;
10002 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
10004 if Chars (Argx) = Name_Ravenscar then
10005 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
10006 elsif Chars (Argx) = Name_Restricted then
10007 Set_Profile_Restrictions (Restricted, N, Warn => True);
10009 Error_Pragma_Arg ("& is not a valid profile", Argx);
10013 --------------------------
10014 -- Propagate_Exceptions --
10015 --------------------------
10017 -- pragma Propagate_Exceptions;
10019 -- Note: this pragma is obsolete and has no effect
10021 when Pragma_Propagate_Exceptions =>
10023 Check_Arg_Count (0);
10025 if In_Extended_Main_Source_Unit (N) then
10026 Propagate_Exceptions := True;
10033 -- pragma Psect_Object (
10034 -- [Internal =>] LOCAL_NAME,
10035 -- [, [External =>] EXTERNAL_SYMBOL]
10036 -- [, [Size =>] EXTERNAL_SYMBOL]);
10038 when Pragma_Psect_Object | Pragma_Common_Object =>
10039 Psect_Object : declare
10040 Args : Args_List (1 .. 3);
10041 Names : constant Name_List (1 .. 3) := (
10046 Internal : Node_Id renames Args (1);
10047 External : Node_Id renames Args (2);
10048 Size : Node_Id renames Args (3);
10050 Def_Id : Entity_Id;
10052 procedure Check_Too_Long (Arg : Node_Id);
10053 -- Posts message if the argument is an identifier with more
10054 -- than 31 characters, or a string literal with more than
10055 -- 31 characters, and we are operating under VMS
10057 --------------------
10058 -- Check_Too_Long --
10059 --------------------
10061 procedure Check_Too_Long (Arg : Node_Id) is
10062 X : constant Node_Id := Original_Node (Arg);
10065 if not Nkind_In (X, N_String_Literal, N_Identifier) then
10067 ("inappropriate argument for pragma %", Arg);
10070 if OpenVMS_On_Target then
10071 if (Nkind (X) = N_String_Literal
10072 and then String_Length (Strval (X)) > 31)
10074 (Nkind (X) = N_Identifier
10075 and then Length_Of_Name (Chars (X)) > 31)
10078 ("argument for pragma % is longer than 31 characters",
10082 end Check_Too_Long;
10084 -- Start of processing for Common_Object/Psect_Object
10088 Gather_Associations (Names, Args);
10089 Process_Extended_Import_Export_Internal_Arg (Internal);
10091 Def_Id := Entity (Internal);
10093 if Ekind (Def_Id) /= E_Constant
10094 and then Ekind (Def_Id) /= E_Variable
10097 ("pragma% must designate an object", Internal);
10100 Check_Too_Long (Internal);
10102 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
10104 ("cannot use pragma% for imported/exported object",
10108 if Is_Concurrent_Type (Etype (Internal)) then
10110 ("cannot specify pragma % for task/protected object",
10114 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
10116 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
10118 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
10121 if Ekind (Def_Id) = E_Constant then
10123 ("cannot specify pragma % for a constant", Internal);
10126 if Is_Record_Type (Etype (Internal)) then
10132 Ent := First_Entity (Etype (Internal));
10133 while Present (Ent) loop
10134 Decl := Declaration_Node (Ent);
10136 if Ekind (Ent) = E_Component
10137 and then Nkind (Decl) = N_Component_Declaration
10138 and then Present (Expression (Decl))
10139 and then Warn_On_Export_Import
10142 ("?object for pragma % has defaults", Internal);
10152 if Present (Size) then
10153 Check_Too_Long (Size);
10156 if Present (External) then
10157 Check_Arg_Is_External_Name (External);
10158 Check_Too_Long (External);
10161 -- If all error tests pass, link pragma on to the rep item chain
10163 Record_Rep_Item (Def_Id, N);
10170 -- pragma Pure [(library_unit_NAME)];
10172 when Pragma_Pure => Pure : declare
10176 Check_Ada_83_Warning;
10177 Check_Valid_Library_Unit_Pragma;
10179 if Nkind (N) = N_Null_Statement then
10183 Ent := Find_Lib_Unit_Name;
10185 Set_Has_Pragma_Pure (Ent);
10186 Set_Suppress_Elaboration_Warnings (Ent);
10193 -- pragma Pure_05 [(library_unit_NAME)];
10195 -- This pragma is useable only in GNAT_Mode, where it is used like
10196 -- pragma Pure but it is only effective in Ada 2005 mode (otherwise
10197 -- it is ignored). It may be used after a pragma Preelaborate, in
10198 -- which case it overrides the effect of the pragma Preelaborate.
10199 -- This is used to implement AI-362 which recategorizes some run-time
10200 -- packages in Ada 2005 mode.
10202 when Pragma_Pure_05 => Pure_05 : declare
10207 Check_Valid_Library_Unit_Pragma;
10209 if not GNAT_Mode then
10210 Error_Pragma ("pragma% only available in GNAT mode");
10213 if Nkind (N) = N_Null_Statement then
10217 -- This is one of the few cases where we need to test the value of
10218 -- Ada_Version_Explicit rather than Ada_Version (which is always
10219 -- set to Ada_05 in a predefined unit), we need to know the
10220 -- explicit version set to know if this pragma is active.
10222 if Ada_Version_Explicit >= Ada_05 then
10223 Ent := Find_Lib_Unit_Name;
10224 Set_Is_Preelaborated (Ent, False);
10226 Set_Suppress_Elaboration_Warnings (Ent);
10230 -------------------
10231 -- Pure_Function --
10232 -------------------
10234 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
10236 when Pragma_Pure_Function => Pure_Function : declare
10239 Def_Id : Entity_Id;
10240 Effective : Boolean := False;
10244 Check_Arg_Count (1);
10245 Check_Optional_Identifier (Arg1, Name_Entity);
10246 Check_Arg_Is_Local_Name (Arg1);
10247 E_Id := Expression (Arg1);
10249 if Error_Posted (E_Id) then
10253 -- Loop through homonyms (overloadings) of referenced entity
10255 E := Entity (E_Id);
10257 if Present (E) then
10259 Def_Id := Get_Base_Subprogram (E);
10261 if Ekind (Def_Id) /= E_Function
10262 and then Ekind (Def_Id) /= E_Generic_Function
10263 and then Ekind (Def_Id) /= E_Operator
10266 ("pragma% requires a function name", Arg1);
10269 Set_Is_Pure (Def_Id);
10271 if not Has_Pragma_Pure_Function (Def_Id) then
10272 Set_Has_Pragma_Pure_Function (Def_Id);
10277 exit when No (E) or else Scope (E) /= Current_Scope;
10281 and then Warn_On_Redundant_Constructs
10283 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
10289 --------------------
10290 -- Queuing_Policy --
10291 --------------------
10293 -- pragma Queuing_Policy (policy_IDENTIFIER);
10295 when Pragma_Queuing_Policy => declare
10299 Check_Ada_83_Warning;
10300 Check_Arg_Count (1);
10301 Check_No_Identifiers;
10302 Check_Arg_Is_Queuing_Policy (Arg1);
10303 Check_Valid_Configuration_Pragma;
10304 Get_Name_String (Chars (Expression (Arg1)));
10305 QP := Fold_Upper (Name_Buffer (1));
10307 if Queuing_Policy /= ' '
10308 and then Queuing_Policy /= QP
10310 Error_Msg_Sloc := Queuing_Policy_Sloc;
10311 Error_Pragma ("queuing policy incompatible with policy#");
10313 -- Set new policy, but always preserve System_Location since
10314 -- we like the error message with the run time name.
10317 Queuing_Policy := QP;
10319 if Queuing_Policy_Sloc /= System_Location then
10320 Queuing_Policy_Sloc := Loc;
10325 -----------------------
10326 -- Relative_Deadline --
10327 -----------------------
10329 -- pragma Relative_Deadline (time_span_EXPRESSION);
10331 when Pragma_Relative_Deadline => Relative_Deadline : declare
10332 P : constant Node_Id := Parent (N);
10337 Check_No_Identifiers;
10338 Check_Arg_Count (1);
10340 Arg := Expression (Arg1);
10342 -- The expression must be analyzed in the special manner described
10343 -- in "Handling of Default and Per-Object Expressions" in sem.ads.
10345 Preanalyze_Spec_Expression (Arg, RTE (RE_Time_Span));
10349 if Nkind (P) = N_Subprogram_Body then
10350 Check_In_Main_Program;
10354 elsif Nkind (P) = N_Task_Definition then
10357 -- Anything else is incorrect
10363 if Has_Relative_Deadline_Pragma (P) then
10364 Error_Pragma ("duplicate pragma% not allowed");
10366 Set_Has_Relative_Deadline_Pragma (P, True);
10368 if Nkind (P) = N_Task_Definition then
10369 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10372 end Relative_Deadline;
10374 ---------------------------
10375 -- Remote_Call_Interface --
10376 ---------------------------
10378 -- pragma Remote_Call_Interface [(library_unit_NAME)];
10380 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
10381 Cunit_Node : Node_Id;
10382 Cunit_Ent : Entity_Id;
10386 Check_Ada_83_Warning;
10387 Check_Valid_Library_Unit_Pragma;
10389 if Nkind (N) = N_Null_Statement then
10393 Cunit_Node := Cunit (Current_Sem_Unit);
10394 K := Nkind (Unit (Cunit_Node));
10395 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10397 if K = N_Package_Declaration
10398 or else K = N_Generic_Package_Declaration
10399 or else K = N_Subprogram_Declaration
10400 or else K = N_Generic_Subprogram_Declaration
10401 or else (K = N_Subprogram_Body
10402 and then Acts_As_Spec (Unit (Cunit_Node)))
10407 "pragma% must apply to package or subprogram declaration");
10410 Set_Is_Remote_Call_Interface (Cunit_Ent);
10411 end Remote_Call_Interface;
10417 -- pragma Remote_Types [(library_unit_NAME)];
10419 when Pragma_Remote_Types => Remote_Types : declare
10420 Cunit_Node : Node_Id;
10421 Cunit_Ent : Entity_Id;
10424 Check_Ada_83_Warning;
10425 Check_Valid_Library_Unit_Pragma;
10427 if Nkind (N) = N_Null_Statement then
10431 Cunit_Node := Cunit (Current_Sem_Unit);
10432 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10434 if not Nkind_In (Unit (Cunit_Node), N_Package_Declaration,
10435 N_Generic_Package_Declaration)
10438 ("pragma% can only apply to a package declaration");
10441 Set_Is_Remote_Types (Cunit_Ent);
10448 -- pragma Ravenscar;
10450 when Pragma_Ravenscar =>
10452 Check_Arg_Count (0);
10453 Check_Valid_Configuration_Pragma;
10454 Set_Ravenscar_Profile (N);
10456 if Warn_On_Obsolescent_Feature then
10458 ("pragma Ravenscar is an obsolescent feature?", N);
10460 ("|use pragma Profile (Ravenscar) instead", N);
10463 -------------------------
10464 -- Restricted_Run_Time --
10465 -------------------------
10467 -- pragma Restricted_Run_Time;
10469 when Pragma_Restricted_Run_Time =>
10471 Check_Arg_Count (0);
10472 Check_Valid_Configuration_Pragma;
10473 Set_Profile_Restrictions
10474 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
10476 if Warn_On_Obsolescent_Feature then
10478 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
10480 ("|use pragma Profile (Restricted) instead", N);
10487 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
10490 -- restriction_IDENTIFIER
10491 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10493 when Pragma_Restrictions =>
10494 Process_Restrictions_Or_Restriction_Warnings
10495 (Warn => Treat_Restrictions_As_Warnings);
10497 --------------------------
10498 -- Restriction_Warnings --
10499 --------------------------
10501 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
10504 -- restriction_IDENTIFIER
10505 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10507 when Pragma_Restriction_Warnings =>
10509 Process_Restrictions_Or_Restriction_Warnings (Warn => True);
10515 -- pragma Reviewable;
10517 when Pragma_Reviewable =>
10518 Check_Ada_83_Warning;
10519 Check_Arg_Count (0);
10522 -------------------
10523 -- Share_Generic --
10524 -------------------
10526 -- pragma Share_Generic (NAME {, NAME});
10528 when Pragma_Share_Generic =>
10530 Process_Generic_List;
10536 -- pragma Shared (LOCAL_NAME);
10538 when Pragma_Shared =>
10540 Process_Atomic_Shared_Volatile;
10542 --------------------
10543 -- Shared_Passive --
10544 --------------------
10546 -- pragma Shared_Passive [(library_unit_NAME)];
10548 -- Set the flag Is_Shared_Passive of program unit name entity
10550 when Pragma_Shared_Passive => Shared_Passive : declare
10551 Cunit_Node : Node_Id;
10552 Cunit_Ent : Entity_Id;
10555 Check_Ada_83_Warning;
10556 Check_Valid_Library_Unit_Pragma;
10558 if Nkind (N) = N_Null_Statement then
10562 Cunit_Node := Cunit (Current_Sem_Unit);
10563 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10565 if not Nkind_In (Unit (Cunit_Node), N_Package_Declaration,
10566 N_Generic_Package_Declaration)
10569 ("pragma% can only apply to a package declaration");
10572 Set_Is_Shared_Passive (Cunit_Ent);
10573 end Shared_Passive;
10575 ----------------------
10576 -- Source_File_Name --
10577 ----------------------
10579 -- There are five forms for this pragma:
10581 -- pragma Source_File_Name (
10582 -- [UNIT_NAME =>] unit_NAME,
10583 -- BODY_FILE_NAME => STRING_LITERAL
10584 -- [, [INDEX =>] INTEGER_LITERAL]);
10586 -- pragma Source_File_Name (
10587 -- [UNIT_NAME =>] unit_NAME,
10588 -- SPEC_FILE_NAME => STRING_LITERAL
10589 -- [, [INDEX =>] INTEGER_LITERAL]);
10591 -- pragma Source_File_Name (
10592 -- BODY_FILE_NAME => STRING_LITERAL
10593 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10594 -- [, CASING => CASING_SPEC]);
10596 -- pragma Source_File_Name (
10597 -- SPEC_FILE_NAME => STRING_LITERAL
10598 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10599 -- [, CASING => CASING_SPEC]);
10601 -- pragma Source_File_Name (
10602 -- SUBUNIT_FILE_NAME => STRING_LITERAL
10603 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10604 -- [, CASING => CASING_SPEC]);
10606 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
10608 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
10609 -- Source_File_Name (SFN), however their usage is exclusive:
10610 -- SFN can only be used when no project file is used, while
10611 -- SFNP can only be used when a project file is used.
10613 -- No processing here. Processing was completed during parsing,
10614 -- since we need to have file names set as early as possible.
10615 -- Units are loaded well before semantic processing starts.
10617 -- The only processing we defer to this point is the check
10618 -- for correct placement.
10620 when Pragma_Source_File_Name =>
10622 Check_Valid_Configuration_Pragma;
10624 ------------------------------
10625 -- Source_File_Name_Project --
10626 ------------------------------
10628 -- See Source_File_Name for syntax
10630 -- No processing here. Processing was completed during parsing,
10631 -- since we need to have file names set as early as possible.
10632 -- Units are loaded well before semantic processing starts.
10634 -- The only processing we defer to this point is the check
10635 -- for correct placement.
10637 when Pragma_Source_File_Name_Project =>
10639 Check_Valid_Configuration_Pragma;
10641 -- Check that a pragma Source_File_Name_Project is used only
10642 -- in a configuration pragmas file.
10644 -- Pragmas Source_File_Name_Project should only be generated
10645 -- by the Project Manager in configuration pragmas files.
10647 -- This is really an ugly test. It seems to depend on some
10648 -- accidental and undocumented property. At the very least
10649 -- it needs to be documented, but it would be better to have
10650 -- a clean way of testing if we are in a configuration file???
10652 if Present (Parent (N)) then
10654 ("pragma% can only appear in a configuration pragmas file");
10657 ----------------------
10658 -- Source_Reference --
10659 ----------------------
10661 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
10663 -- Nothing to do, all processing completed in Par.Prag, since we
10664 -- need the information for possible parser messages that are output
10666 when Pragma_Source_Reference =>
10669 --------------------------------
10670 -- Static_Elaboration_Desired --
10671 --------------------------------
10673 -- pragma Static_Elaboration_Desired (DIRECT_NAME);
10675 when Pragma_Static_Elaboration_Desired =>
10677 Check_At_Most_N_Arguments (1);
10679 if Is_Compilation_Unit (Current_Scope)
10680 and then Ekind (Current_Scope) = E_Package
10682 Set_Static_Elaboration_Desired (Current_Scope, True);
10684 Error_Pragma ("pragma% must apply to a library-level package");
10691 -- pragma Storage_Size (EXPRESSION);
10693 when Pragma_Storage_Size => Storage_Size : declare
10694 P : constant Node_Id := Parent (N);
10698 Check_No_Identifiers;
10699 Check_Arg_Count (1);
10701 -- The expression must be analyzed in the special manner described
10702 -- in "Handling of Default Expressions" in sem.ads.
10704 Arg := Expression (Arg1);
10705 Preanalyze_Spec_Expression (Arg, Any_Integer);
10707 if not Is_Static_Expression (Arg) then
10708 Check_Restriction (Static_Storage_Size, Arg);
10711 if Nkind (P) /= N_Task_Definition then
10716 if Has_Storage_Size_Pragma (P) then
10717 Error_Pragma ("duplicate pragma% not allowed");
10719 Set_Has_Storage_Size_Pragma (P, True);
10722 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10723 -- ??? exp_ch9 should use this!
10731 -- pragma Storage_Unit (NUMERIC_LITERAL);
10733 -- Only permitted argument is System'Storage_Unit value
10735 when Pragma_Storage_Unit =>
10736 Check_No_Identifiers;
10737 Check_Arg_Count (1);
10738 Check_Arg_Is_Integer_Literal (Arg1);
10740 if Intval (Expression (Arg1)) /=
10741 UI_From_Int (Ttypes.System_Storage_Unit)
10743 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
10745 ("the only allowed argument for pragma% is ^", Arg1);
10748 --------------------
10749 -- Stream_Convert --
10750 --------------------
10752 -- pragma Stream_Convert (
10753 -- [Entity =>] type_LOCAL_NAME,
10754 -- [Read =>] function_NAME,
10755 -- [Write =>] function NAME);
10757 when Pragma_Stream_Convert => Stream_Convert : declare
10759 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
10760 -- Check that the given argument is the name of a local
10761 -- function of one argument that is not overloaded earlier
10762 -- in the current local scope. A check is also made that the
10763 -- argument is a function with one parameter.
10765 --------------------------------------
10766 -- Check_OK_Stream_Convert_Function --
10767 --------------------------------------
10769 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
10773 Check_Arg_Is_Local_Name (Arg);
10774 Ent := Entity (Expression (Arg));
10776 if Has_Homonym (Ent) then
10778 ("argument for pragma% may not be overloaded", Arg);
10781 if Ekind (Ent) /= E_Function
10782 or else No (First_Formal (Ent))
10783 or else Present (Next_Formal (First_Formal (Ent)))
10786 ("argument for pragma% must be" &
10787 " function of one argument", Arg);
10789 end Check_OK_Stream_Convert_Function;
10791 -- Start of processing for Stream_Convert
10795 Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
10796 Check_Arg_Count (3);
10797 Check_Optional_Identifier (Arg1, Name_Entity);
10798 Check_Optional_Identifier (Arg2, Name_Read);
10799 Check_Optional_Identifier (Arg3, Name_Write);
10800 Check_Arg_Is_Local_Name (Arg1);
10801 Check_OK_Stream_Convert_Function (Arg2);
10802 Check_OK_Stream_Convert_Function (Arg3);
10805 Typ : constant Entity_Id :=
10806 Underlying_Type (Entity (Expression (Arg1)));
10807 Read : constant Entity_Id := Entity (Expression (Arg2));
10808 Write : constant Entity_Id := Entity (Expression (Arg3));
10811 Check_First_Subtype (Arg1);
10813 -- Check for too early or too late. Note that we don't enforce
10814 -- the rule about primitive operations in this case, since, as
10815 -- is the case for explicit stream attributes themselves, these
10816 -- restrictions are not appropriate. Note that the chaining of
10817 -- the pragma by Rep_Item_Too_Late is actually the critical
10818 -- processing done for this pragma.
10820 if Rep_Item_Too_Early (Typ, N)
10822 Rep_Item_Too_Late (Typ, N, FOnly => True)
10827 -- Return if previous error
10829 if Etype (Typ) = Any_Type
10831 Etype (Read) = Any_Type
10833 Etype (Write) = Any_Type
10840 if Underlying_Type (Etype (Read)) /= Typ then
10842 ("incorrect return type for function&", Arg2);
10845 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
10847 ("incorrect parameter type for function&", Arg3);
10850 if Underlying_Type (Etype (First_Formal (Read))) /=
10851 Underlying_Type (Etype (Write))
10854 ("result type of & does not match Read parameter type",
10858 end Stream_Convert;
10860 -------------------------
10861 -- Style_Checks (GNAT) --
10862 -------------------------
10864 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
10866 -- This is processed by the parser since some of the style
10867 -- checks take place during source scanning and parsing. This
10868 -- means that we don't need to issue error messages here.
10870 when Pragma_Style_Checks => Style_Checks : declare
10871 A : constant Node_Id := Expression (Arg1);
10877 Check_No_Identifiers;
10879 -- Two argument form
10881 if Arg_Count = 2 then
10882 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
10889 E_Id := Expression (Arg2);
10892 if not Is_Entity_Name (E_Id) then
10894 ("second argument of pragma% must be entity name",
10898 E := Entity (E_Id);
10904 Set_Suppress_Style_Checks (E,
10905 (Chars (Expression (Arg1)) = Name_Off));
10906 exit when No (Homonym (E));
10912 -- One argument form
10915 Check_Arg_Count (1);
10917 if Nkind (A) = N_String_Literal then
10921 Slen : constant Natural := Natural (String_Length (S));
10922 Options : String (1 .. Slen);
10928 C := Get_String_Char (S, Int (J));
10929 exit when not In_Character_Range (C);
10930 Options (J) := Get_Character (C);
10932 -- If at end of string, set options. As per discussion
10933 -- above, no need to check for errors, since we issued
10934 -- them in the parser.
10937 Set_Style_Check_Options (Options);
10945 elsif Nkind (A) = N_Identifier then
10946 if Chars (A) = Name_All_Checks then
10947 Set_Default_Style_Check_Options;
10949 elsif Chars (A) = Name_On then
10950 Style_Check := True;
10952 elsif Chars (A) = Name_Off then
10953 Style_Check := False;
10963 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
10965 when Pragma_Subtitle =>
10967 Check_Arg_Count (1);
10968 Check_Optional_Identifier (Arg1, Name_Subtitle);
10969 Check_Arg_Is_String_Literal (Arg1);
10975 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
10977 when Pragma_Suppress =>
10978 Process_Suppress_Unsuppress (True);
10984 -- pragma Suppress_All;
10986 -- The only check made here is that the pragma appears in the
10987 -- proper place, i.e. following a compilation unit. If indeed
10988 -- it appears in this context, then the parser has already
10989 -- inserted an equivalent pragma Suppress (All_Checks) to get
10990 -- the required effect.
10992 when Pragma_Suppress_All =>
10994 Check_Arg_Count (0);
10996 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
10997 or else not Is_List_Member (N)
10998 or else List_Containing (N) /= Pragmas_After (Parent (N))
11001 ("misplaced pragma%, must follow compilation unit");
11004 -------------------------
11005 -- Suppress_Debug_Info --
11006 -------------------------
11008 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
11010 when Pragma_Suppress_Debug_Info =>
11012 Check_Arg_Count (1);
11013 Check_Optional_Identifier (Arg1, Name_Entity);
11014 Check_Arg_Is_Local_Name (Arg1);
11015 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
11017 ----------------------------------
11018 -- Suppress_Exception_Locations --
11019 ----------------------------------
11021 -- pragma Suppress_Exception_Locations;
11023 when Pragma_Suppress_Exception_Locations =>
11025 Check_Arg_Count (0);
11026 Check_Valid_Configuration_Pragma;
11027 Exception_Locations_Suppressed := True;
11029 -----------------------------
11030 -- Suppress_Initialization --
11031 -----------------------------
11033 -- pragma Suppress_Initialization ([Entity =>] type_Name);
11035 when Pragma_Suppress_Initialization => Suppress_Init : declare
11041 Check_Arg_Count (1);
11042 Check_Optional_Identifier (Arg1, Name_Entity);
11043 Check_Arg_Is_Local_Name (Arg1);
11045 E_Id := Expression (Arg1);
11047 if Etype (E_Id) = Any_Type then
11051 E := Entity (E_Id);
11053 if Is_Type (E) then
11054 if Is_Incomplete_Or_Private_Type (E) then
11055 if No (Full_View (Base_Type (E))) then
11057 ("argument of pragma% cannot be an incomplete type",
11060 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
11063 Set_Suppress_Init_Proc (Base_Type (E));
11068 ("pragma% requires argument that is a type name", Arg1);
11076 -- pragma System_Name (DIRECT_NAME);
11078 -- Syntax check: one argument, which must be the identifier GNAT
11079 -- or the identifier GCC, no other identifiers are acceptable.
11081 when Pragma_System_Name =>
11083 Check_No_Identifiers;
11084 Check_Arg_Count (1);
11085 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
11087 -----------------------------
11088 -- Task_Dispatching_Policy --
11089 -----------------------------
11091 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
11093 when Pragma_Task_Dispatching_Policy => declare
11097 Check_Ada_83_Warning;
11098 Check_Arg_Count (1);
11099 Check_No_Identifiers;
11100 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
11101 Check_Valid_Configuration_Pragma;
11102 Get_Name_String (Chars (Expression (Arg1)));
11103 DP := Fold_Upper (Name_Buffer (1));
11105 if Task_Dispatching_Policy /= ' '
11106 and then Task_Dispatching_Policy /= DP
11108 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
11110 ("task dispatching policy incompatible with policy#");
11112 -- Set new policy, but always preserve System_Location since
11113 -- we like the error message with the run time name.
11116 Task_Dispatching_Policy := DP;
11118 if Task_Dispatching_Policy_Sloc /= System_Location then
11119 Task_Dispatching_Policy_Sloc := Loc;
11128 -- pragma Task_Info (EXPRESSION);
11130 when Pragma_Task_Info => Task_Info : declare
11131 P : constant Node_Id := Parent (N);
11136 if Nkind (P) /= N_Task_Definition then
11137 Error_Pragma ("pragma% must appear in task definition");
11140 Check_No_Identifiers;
11141 Check_Arg_Count (1);
11143 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
11145 if Etype (Expression (Arg1)) = Any_Type then
11149 if Has_Task_Info_Pragma (P) then
11150 Error_Pragma ("duplicate pragma% not allowed");
11152 Set_Has_Task_Info_Pragma (P, True);
11160 -- pragma Task_Name (string_EXPRESSION);
11162 when Pragma_Task_Name => Task_Name : declare
11163 P : constant Node_Id := Parent (N);
11167 Check_No_Identifiers;
11168 Check_Arg_Count (1);
11170 Arg := Expression (Arg1);
11171 Analyze_And_Resolve (Arg, Standard_String);
11173 if Nkind (P) /= N_Task_Definition then
11177 if Has_Task_Name_Pragma (P) then
11178 Error_Pragma ("duplicate pragma% not allowed");
11180 Set_Has_Task_Name_Pragma (P, True);
11181 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
11189 -- pragma Task_Storage (
11190 -- [Task_Type =>] LOCAL_NAME,
11191 -- [Top_Guard =>] static_integer_EXPRESSION);
11193 when Pragma_Task_Storage => Task_Storage : declare
11194 Args : Args_List (1 .. 2);
11195 Names : constant Name_List (1 .. 2) := (
11199 Task_Type : Node_Id renames Args (1);
11200 Top_Guard : Node_Id renames Args (2);
11206 Gather_Associations (Names, Args);
11208 if No (Task_Type) then
11210 ("missing task_type argument for pragma%");
11213 Check_Arg_Is_Local_Name (Task_Type);
11215 Ent := Entity (Task_Type);
11217 if not Is_Task_Type (Ent) then
11219 ("argument for pragma% must be task type", Task_Type);
11222 if No (Top_Guard) then
11224 ("pragma% takes two arguments", Task_Type);
11226 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
11229 Check_First_Subtype (Task_Type);
11231 if Rep_Item_Too_Late (Ent, N) then
11236 --------------------------
11237 -- Thread_Local_Storage --
11238 --------------------------
11240 -- pragma Thread_Local_Storage ([Entity =>] LOCAL_NAME);
11242 when Pragma_Thread_Local_Storage => Thread_Local_Storage : declare
11248 Check_Arg_Count (1);
11249 Check_Optional_Identifier (Arg1, Name_Entity);
11250 Check_Arg_Is_Library_Level_Local_Name (Arg1);
11252 Id := Expression (Arg1);
11255 if not Is_Entity_Name (Id)
11256 or else Ekind (Entity (Id)) /= E_Variable
11258 Error_Pragma_Arg ("local variable name required", Arg1);
11263 if Rep_Item_Too_Early (E, N)
11264 or else Rep_Item_Too_Late (E, N)
11269 Set_Has_Pragma_Thread_Local_Storage (E);
11270 Set_Has_Gigi_Rep_Item (E);
11271 end Thread_Local_Storage;
11277 -- pragma Time_Slice (static_duration_EXPRESSION);
11279 when Pragma_Time_Slice => Time_Slice : declare
11285 Check_Arg_Count (1);
11286 Check_No_Identifiers;
11287 Check_In_Main_Program;
11288 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
11290 if not Error_Posted (Arg1) then
11292 while Present (Nod) loop
11293 if Nkind (Nod) = N_Pragma
11294 and then Pragma_Name (Nod) = Name_Time_Slice
11296 Error_Msg_Name_1 := Pname;
11297 Error_Msg_N ("duplicate pragma% not permitted", Nod);
11304 -- Process only if in main unit
11306 if Get_Source_Unit (Loc) = Main_Unit then
11307 Opt.Time_Slice_Set := True;
11308 Val := Expr_Value_R (Expression (Arg1));
11310 if Val <= Ureal_0 then
11311 Opt.Time_Slice_Value := 0;
11313 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
11314 Opt.Time_Slice_Value := 1_000_000_000;
11317 Opt.Time_Slice_Value :=
11318 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
11327 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
11329 -- TITLING_OPTION ::=
11330 -- [Title =>] STRING_LITERAL
11331 -- | [Subtitle =>] STRING_LITERAL
11333 when Pragma_Title => Title : declare
11334 Args : Args_List (1 .. 2);
11335 Names : constant Name_List (1 .. 2) := (
11341 Gather_Associations (Names, Args);
11343 for J in 1 .. 2 loop
11344 if Present (Args (J)) then
11345 Check_Arg_Is_String_Literal (Args (J));
11350 ---------------------
11351 -- Unchecked_Union --
11352 ---------------------
11354 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
11356 when Pragma_Unchecked_Union => Unchecked_Union : declare
11357 Assoc : constant Node_Id := Arg1;
11358 Type_Id : constant Node_Id := Expression (Assoc);
11369 Check_No_Identifiers;
11370 Check_Arg_Count (1);
11371 Check_Arg_Is_Local_Name (Arg1);
11373 Find_Type (Type_Id);
11374 Typ := Entity (Type_Id);
11377 or else Rep_Item_Too_Early (Typ, N)
11381 Typ := Underlying_Type (Typ);
11384 if Rep_Item_Too_Late (Typ, N) then
11388 Check_First_Subtype (Arg1);
11390 -- Note remaining cases are references to a type in the current
11391 -- declarative part. If we find an error, we post the error on
11392 -- the relevant type declaration at an appropriate point.
11394 if not Is_Record_Type (Typ) then
11395 Error_Msg_N ("Unchecked_Union must be record type", Typ);
11398 elsif Is_Tagged_Type (Typ) then
11399 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
11402 elsif Is_Limited_Type (Typ) then
11404 ("Unchecked_Union must not be limited record type", Typ);
11405 Explain_Limited_Type (Typ, Typ);
11409 if not Has_Discriminants (Typ) then
11411 ("Unchecked_Union must have one discriminant", Typ);
11415 Discr := First_Discriminant (Typ);
11416 while Present (Discr) loop
11417 if No (Discriminant_Default_Value (Discr)) then
11419 ("Unchecked_Union discriminant must have default value",
11422 Next_Discriminant (Discr);
11425 Tdef := Type_Definition (Declaration_Node (Typ));
11426 Clist := Component_List (Tdef);
11428 Comp := First (Component_Items (Clist));
11429 while Present (Comp) loop
11430 Check_Component (Comp);
11434 if No (Clist) or else No (Variant_Part (Clist)) then
11436 ("Unchecked_Union must have variant part",
11441 Vpart := Variant_Part (Clist);
11443 Variant := First (Variants (Vpart));
11444 while Present (Variant) loop
11445 Check_Variant (Variant);
11450 Set_Is_Unchecked_Union (Typ, True);
11451 Set_Convention (Typ, Convention_C);
11453 Set_Has_Unchecked_Union (Base_Type (Typ), True);
11454 Set_Is_Unchecked_Union (Base_Type (Typ), True);
11455 end Unchecked_Union;
11457 ------------------------
11458 -- Unimplemented_Unit --
11459 ------------------------
11461 -- pragma Unimplemented_Unit;
11463 -- Note: this only gives an error if we are generating code,
11464 -- or if we are in a generic library unit (where the pragma
11465 -- appears in the body, not in the spec).
11467 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
11468 Cunitent : constant Entity_Id :=
11469 Cunit_Entity (Get_Source_Unit (Loc));
11470 Ent_Kind : constant Entity_Kind :=
11475 Check_Arg_Count (0);
11477 if Operating_Mode = Generate_Code
11478 or else Ent_Kind = E_Generic_Function
11479 or else Ent_Kind = E_Generic_Procedure
11480 or else Ent_Kind = E_Generic_Package
11482 Get_Name_String (Chars (Cunitent));
11483 Set_Casing (Mixed_Case);
11484 Write_Str (Name_Buffer (1 .. Name_Len));
11485 Write_Str (" is not supported in this configuration");
11487 raise Unrecoverable_Error;
11489 end Unimplemented_Unit;
11491 ------------------------
11492 -- Universal_Aliasing --
11493 ------------------------
11495 -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)];
11497 when Pragma_Universal_Aliasing => Universal_Alias : declare
11502 Check_Arg_Count (1);
11503 Check_Optional_Identifier (Arg2, Name_Entity);
11504 Check_Arg_Is_Local_Name (Arg1);
11505 E_Id := Entity (Expression (Arg1));
11507 if E_Id = Any_Type then
11509 elsif No (E_Id) or else not Is_Type (E_Id) then
11510 Error_Pragma_Arg ("pragma% requires type", Arg1);
11513 Set_Universal_Aliasing (Implementation_Base_Type (E_Id));
11514 end Universal_Alias;
11516 --------------------
11517 -- Universal_Data --
11518 --------------------
11520 -- pragma Universal_Data [(library_unit_NAME)];
11522 when Pragma_Universal_Data =>
11525 -- If this is a configuration pragma, then set the universal
11526 -- addressing option, otherwise confirm that the pragma
11527 -- satisfies the requirements of library unit pragma placement
11528 -- and leave it to the GNAAMP back end to detect the pragma
11529 -- (avoids transitive setting of the option due to withed units).
11531 if Is_Configuration_Pragma then
11532 Universal_Addressing_On_AAMP := True;
11534 Check_Valid_Library_Unit_Pragma;
11537 if not AAMP_On_Target then
11538 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
11545 -- pragma Unmodified (local_Name {, local_Name});
11547 when Pragma_Unmodified => Unmodified : declare
11548 Arg_Node : Node_Id;
11549 Arg_Expr : Node_Id;
11550 Arg_Ent : Entity_Id;
11554 Check_At_Least_N_Arguments (1);
11556 -- Loop through arguments
11559 while Present (Arg_Node) loop
11560 Check_No_Identifier (Arg_Node);
11562 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11563 -- will in fact generate reference, so that the entity will
11564 -- have a reference, which will inhibit any warnings about
11565 -- it not being referenced, and also properly show up in the
11566 -- ali file as a reference. But this reference is recorded
11567 -- before the Has_Pragma_Unreferenced flag is set, so that
11568 -- no warning is generated for this reference.
11570 Check_Arg_Is_Local_Name (Arg_Node);
11571 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11573 if Is_Entity_Name (Arg_Expr) then
11574 Arg_Ent := Entity (Arg_Expr);
11576 if not Is_Assignable (Arg_Ent) then
11578 ("pragma% can only be applied to a variable",
11581 Set_Has_Pragma_Unmodified (Arg_Ent);
11593 -- pragma Unreferenced (local_Name {, local_Name});
11595 -- or when used in a context clause:
11597 -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
11599 when Pragma_Unreferenced => Unreferenced : declare
11600 Arg_Node : Node_Id;
11601 Arg_Expr : Node_Id;
11602 Arg_Ent : Entity_Id;
11607 Check_At_Least_N_Arguments (1);
11609 -- Check case of appearing within context clause
11611 if Is_In_Context_Clause then
11613 -- The arguments must all be units mentioned in a with clause
11614 -- in the same context clause. Note we already checked (in
11615 -- Par.Prag) that the arguments are either identifiers or
11616 -- selected components.
11619 while Present (Arg_Node) loop
11620 Citem := First (List_Containing (N));
11621 while Citem /= N loop
11622 if Nkind (Citem) = N_With_Clause
11623 and then Same_Name (Name (Citem), Expression (Arg_Node))
11625 Set_Has_Pragma_Unreferenced
11628 (Library_Unit (Citem))));
11629 Set_Unit_Name (Expression (Arg_Node), Name (Citem));
11638 ("argument of pragma% is not with'ed unit", Arg_Node);
11644 -- Case of not in list of context items
11648 while Present (Arg_Node) loop
11649 Check_No_Identifier (Arg_Node);
11651 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11652 -- will in fact generate reference, so that the entity will
11653 -- have a reference, which will inhibit any warnings about
11654 -- it not being referenced, and also properly show up in the
11655 -- ali file as a reference. But this reference is recorded
11656 -- before the Has_Pragma_Unreferenced flag is set, so that
11657 -- no warning is generated for this reference.
11659 Check_Arg_Is_Local_Name (Arg_Node);
11660 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11662 if Is_Entity_Name (Arg_Expr) then
11663 Arg_Ent := Entity (Arg_Expr);
11665 -- If the entity is overloaded, the pragma applies to the
11666 -- most recent overloading, as documented. In this case,
11667 -- name resolution does not generate a reference, so it
11668 -- must be done here explicitly.
11670 if Is_Overloaded (Arg_Expr) then
11671 Generate_Reference (Arg_Ent, N);
11674 Set_Has_Pragma_Unreferenced (Arg_Ent);
11682 --------------------------
11683 -- Unreferenced_Objects --
11684 --------------------------
11686 -- pragma Unreferenced_Objects (local_Name {, local_Name});
11688 when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare
11689 Arg_Node : Node_Id;
11690 Arg_Expr : Node_Id;
11694 Check_At_Least_N_Arguments (1);
11697 while Present (Arg_Node) loop
11698 Check_No_Identifier (Arg_Node);
11699 Check_Arg_Is_Local_Name (Arg_Node);
11700 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11702 if not Is_Entity_Name (Arg_Expr)
11703 or else not Is_Type (Entity (Arg_Expr))
11706 ("argument for pragma% must be type or subtype", Arg_Node);
11709 Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr));
11712 end Unreferenced_Objects;
11714 ------------------------------
11715 -- Unreserve_All_Interrupts --
11716 ------------------------------
11718 -- pragma Unreserve_All_Interrupts;
11720 when Pragma_Unreserve_All_Interrupts =>
11722 Check_Arg_Count (0);
11724 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
11725 Unreserve_All_Interrupts := True;
11732 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
11734 when Pragma_Unsuppress =>
11736 Process_Suppress_Unsuppress (False);
11738 -------------------
11739 -- Use_VADS_Size --
11740 -------------------
11742 -- pragma Use_VADS_Size;
11744 when Pragma_Use_VADS_Size =>
11746 Check_Arg_Count (0);
11747 Check_Valid_Configuration_Pragma;
11748 Use_VADS_Size := True;
11750 ---------------------
11751 -- Validity_Checks --
11752 ---------------------
11754 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
11756 when Pragma_Validity_Checks => Validity_Checks : declare
11757 A : constant Node_Id := Expression (Arg1);
11763 Check_Arg_Count (1);
11764 Check_No_Identifiers;
11766 if Nkind (A) = N_String_Literal then
11770 Slen : constant Natural := Natural (String_Length (S));
11771 Options : String (1 .. Slen);
11777 C := Get_String_Char (S, Int (J));
11778 exit when not In_Character_Range (C);
11779 Options (J) := Get_Character (C);
11782 Set_Validity_Check_Options (Options);
11790 elsif Nkind (A) = N_Identifier then
11792 if Chars (A) = Name_All_Checks then
11793 Set_Validity_Check_Options ("a");
11795 elsif Chars (A) = Name_On then
11796 Validity_Checks_On := True;
11798 elsif Chars (A) = Name_Off then
11799 Validity_Checks_On := False;
11803 end Validity_Checks;
11809 -- pragma Volatile (LOCAL_NAME);
11811 when Pragma_Volatile =>
11812 Process_Atomic_Shared_Volatile;
11814 -------------------------
11815 -- Volatile_Components --
11816 -------------------------
11818 -- pragma Volatile_Components (array_LOCAL_NAME);
11820 -- Volatile is handled by the same circuit as Atomic_Components
11826 -- pragma Warnings (On | Off);
11827 -- pragma Warnings (On | Off, LOCAL_NAME);
11828 -- pragma Warnings (static_string_EXPRESSION);
11829 -- pragma Warnings (On | Off, STRING_LITERAL);
11831 when Pragma_Warnings => Warnings : begin
11833 Check_At_Least_N_Arguments (1);
11834 Check_No_Identifiers;
11837 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
11840 -- One argument case
11842 if Arg_Count = 1 then
11844 -- On/Off one argument case was processed by parser
11846 if Nkind (Argx) = N_Identifier
11848 (Chars (Argx) = Name_On
11850 Chars (Argx) = Name_Off)
11854 -- One argument case must be ON/OFF or static string expr
11856 elsif not Is_Static_String_Expression (Arg1) then
11858 ("argument of pragma% must be On/Off or " &
11859 "static string expression", Arg2);
11861 -- One argument string expression case
11865 Lit : constant Node_Id := Expr_Value_S (Argx);
11866 Str : constant String_Id := Strval (Lit);
11867 Len : constant Nat := String_Length (Str);
11875 while J <= Len loop
11876 C := Get_String_Char (Str, J);
11877 OK := In_Character_Range (C);
11880 Chr := Get_Character (C);
11884 if J < Len and then Chr = '.' then
11886 C := Get_String_Char (Str, J);
11887 Chr := Get_Character (C);
11889 if not Set_Dot_Warning_Switch (Chr) then
11891 ("invalid warning switch character " &
11898 OK := Set_Warning_Switch (Chr);
11904 ("invalid warning switch character " & Chr,
11913 -- Two or more arguments (must be two)
11916 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
11917 Check_At_Most_N_Arguments (2);
11925 E_Id := Expression (Arg2);
11928 -- In the expansion of an inlined body, a reference to
11929 -- the formal may be wrapped in a conversion if the
11930 -- actual is a conversion. Retrieve the real entity name.
11932 if (In_Instance_Body
11933 or else In_Inlined_Body)
11934 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
11936 E_Id := Expression (E_Id);
11939 -- Entity name case
11941 if Is_Entity_Name (E_Id) then
11942 E := Entity (E_Id);
11949 (E, (Chars (Expression (Arg1)) = Name_Off));
11951 if Chars (Expression (Arg1)) = Name_Off
11952 and then Warn_On_Warnings_Off
11954 Warnings_Off_Pragmas.Append ((N, E));
11957 if Is_Enumeration_Type (E) then
11961 Lit := First_Literal (E);
11962 while Present (Lit) loop
11963 Set_Warnings_Off (Lit);
11964 Next_Literal (Lit);
11969 exit when No (Homonym (E));
11974 -- Error if not entity or static string literal case
11976 elsif not Is_Static_String_Expression (Arg2) then
11978 ("second argument of pragma% must be entity " &
11979 "name or static string expression", Arg2);
11981 -- String literal case
11984 String_To_Name_Buffer
11985 (Strval (Expr_Value_S (Expression (Arg2))));
11987 -- Note on configuration pragma case: If this is a
11988 -- configuration pragma, then for an OFF pragma, we
11989 -- just set Config True in the call, which is all
11990 -- that needs to be done. For the case of ON, this
11991 -- is normally an error, unless it is canceling the
11992 -- effect of a previous OFF pragma in the same file.
11993 -- In any other case, an error will be signalled (ON
11994 -- with no matching OFF).
11996 if Chars (Argx) = Name_Off then
11997 Set_Specific_Warning_Off
11998 (Loc, Name_Buffer (1 .. Name_Len),
11999 Config => Is_Configuration_Pragma);
12001 elsif Chars (Argx) = Name_On then
12002 Set_Specific_Warning_On
12003 (Loc, Name_Buffer (1 .. Name_Len), Err);
12007 ("?pragma Warnings On with no " &
12008 "matching Warnings Off",
12018 -------------------
12019 -- Weak_External --
12020 -------------------
12022 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
12024 when Pragma_Weak_External => Weak_External : declare
12029 Check_Arg_Count (1);
12030 Check_Optional_Identifier (Arg1, Name_Entity);
12031 Check_Arg_Is_Library_Level_Local_Name (Arg1);
12032 Ent := Entity (Expression (Arg1));
12034 if Rep_Item_Too_Early (Ent, N) then
12037 Ent := Underlying_Type (Ent);
12040 -- The only processing required is to link this item on to the
12041 -- list of rep items for the given entity. This is accomplished
12042 -- by the call to Rep_Item_Too_Late (when no error is detected
12043 -- and False is returned).
12045 if Rep_Item_Too_Late (Ent, N) then
12048 Set_Has_Gigi_Rep_Item (Ent);
12052 -----------------------------
12053 -- Wide_Character_Encoding --
12054 -----------------------------
12056 -- pragma Wide_Character_Encoding (IDENTIFIER);
12058 when Pragma_Wide_Character_Encoding =>
12061 -- Nothing to do, handled in parser. Note that we do not enforce
12062 -- configuration pragma placement, this pragma can appear at any
12063 -- place in the source, allowing mixed encodings within a single
12068 --------------------
12069 -- Unknown_Pragma --
12070 --------------------
12072 -- Should be impossible, since the case of an unknown pragma is
12073 -- separately processed before the case statement is entered.
12075 when Unknown_Pragma =>
12076 raise Program_Error;
12080 when Pragma_Exit => null;
12081 end Analyze_Pragma;
12083 -------------------
12084 -- Check_Enabled --
12085 -------------------
12087 function Check_Enabled (Nam : Name_Id) return Boolean is
12091 PP := Opt.Check_Policy_List;
12094 return Assertions_Enabled;
12097 Nam = Chars (Expression (First (Pragma_Argument_Associations (PP))))
12100 Chars (Expression (Last (Pragma_Argument_Associations (PP))))
12102 when Name_On | Name_Check =>
12104 when Name_Off | Name_Ignore =>
12107 raise Program_Error;
12111 PP := Next_Pragma (PP);
12116 ---------------------------------
12117 -- Delay_Config_Pragma_Analyze --
12118 ---------------------------------
12120 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
12122 return Pragma_Name (N) = Name_Interrupt_State
12124 Pragma_Name (N) = Name_Priority_Specific_Dispatching;
12125 end Delay_Config_Pragma_Analyze;
12127 -------------------------
12128 -- Get_Base_Subprogram --
12129 -------------------------
12131 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
12132 Result : Entity_Id;
12135 -- Follow subprogram renaming chain
12138 while Is_Subprogram (Result)
12140 (Is_Generic_Instance (Result)
12141 or else Nkind (Parent (Declaration_Node (Result))) =
12142 N_Subprogram_Renaming_Declaration)
12143 and then Present (Alias (Result))
12145 Result := Alias (Result);
12149 end Get_Base_Subprogram;
12151 --------------------
12152 -- Get_Pragma_Arg --
12153 --------------------
12155 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
12157 if Nkind (Arg) = N_Pragma_Argument_Association then
12158 return Expression (Arg);
12162 end Get_Pragma_Arg;
12168 procedure Initialize is
12173 -----------------------------
12174 -- Is_Config_Static_String --
12175 -----------------------------
12177 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
12179 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
12180 -- This is an internal recursive function that is just like the
12181 -- outer function except that it adds the string to the name buffer
12182 -- rather than placing the string in the name buffer.
12184 ------------------------------
12185 -- Add_Config_Static_String --
12186 ------------------------------
12188 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
12195 if Nkind (N) = N_Op_Concat then
12196 if Add_Config_Static_String (Left_Opnd (N)) then
12197 N := Right_Opnd (N);
12203 if Nkind (N) /= N_String_Literal then
12204 Error_Msg_N ("string literal expected for pragma argument", N);
12208 for J in 1 .. String_Length (Strval (N)) loop
12209 C := Get_String_Char (Strval (N), J);
12211 if not In_Character_Range (C) then
12213 ("string literal contains invalid wide character",
12214 Sloc (N) + 1 + Source_Ptr (J));
12218 Add_Char_To_Name_Buffer (Get_Character (C));
12223 end Add_Config_Static_String;
12225 -- Start of processing for Is_Config_Static_String
12230 return Add_Config_Static_String (Arg);
12231 end Is_Config_Static_String;
12233 -----------------------------------------
12234 -- Is_Non_Significant_Pragma_Reference --
12235 -----------------------------------------
12237 -- This function makes use of the following static table which indicates
12238 -- whether a given pragma is significant. A value of -1 in this table
12239 -- indicates that the reference is significant. A value of zero indicates
12240 -- than appearance as any argument is insignificant, a positive value
12241 -- indicates that appearance in that parameter position is significant.
12243 -- A value of 99 flags a special case requiring a special check (this is
12244 -- used for cases not covered by this standard encoding, e.g. pragma Check
12245 -- where the first argument is not significant, but the others are).
12247 Sig_Flags : constant array (Pragma_Id) of Int :=
12248 (Pragma_AST_Entry => -1,
12249 Pragma_Abort_Defer => -1,
12250 Pragma_Ada_83 => -1,
12251 Pragma_Ada_95 => -1,
12252 Pragma_Ada_05 => -1,
12253 Pragma_Ada_2005 => -1,
12254 Pragma_All_Calls_Remote => -1,
12255 Pragma_Annotate => -1,
12256 Pragma_Assert => -1,
12257 Pragma_Assertion_Policy => 0,
12258 Pragma_Assume_No_Invalid_Values => 0,
12259 Pragma_Asynchronous => -1,
12260 Pragma_Atomic => 0,
12261 Pragma_Atomic_Components => 0,
12262 Pragma_Attach_Handler => -1,
12263 Pragma_Check => 99,
12264 Pragma_Check_Name => 0,
12265 Pragma_Check_Policy => 0,
12266 Pragma_CIL_Constructor => -1,
12267 Pragma_CPP_Class => 0,
12268 Pragma_CPP_Constructor => 0,
12269 Pragma_CPP_Virtual => 0,
12270 Pragma_CPP_Vtable => 0,
12271 Pragma_C_Pass_By_Copy => 0,
12272 Pragma_Comment => 0,
12273 Pragma_Common_Object => -1,
12274 Pragma_Compile_Time_Error => -1,
12275 Pragma_Compile_Time_Warning => -1,
12276 Pragma_Compiler_Unit => 0,
12277 Pragma_Complete_Representation => 0,
12278 Pragma_Complex_Representation => 0,
12279 Pragma_Component_Alignment => -1,
12280 Pragma_Controlled => 0,
12281 Pragma_Convention => 0,
12282 Pragma_Convention_Identifier => 0,
12283 Pragma_Debug => -1,
12284 Pragma_Debug_Policy => 0,
12285 Pragma_Detect_Blocking => -1,
12286 Pragma_Discard_Names => 0,
12287 Pragma_Elaborate => -1,
12288 Pragma_Elaborate_All => -1,
12289 Pragma_Elaborate_Body => -1,
12290 Pragma_Elaboration_Checks => -1,
12291 Pragma_Eliminate => -1,
12292 Pragma_Export => -1,
12293 Pragma_Export_Exception => -1,
12294 Pragma_Export_Function => -1,
12295 Pragma_Export_Object => -1,
12296 Pragma_Export_Procedure => -1,
12297 Pragma_Export_Value => -1,
12298 Pragma_Export_Valued_Procedure => -1,
12299 Pragma_Extend_System => -1,
12300 Pragma_Extensions_Allowed => -1,
12301 Pragma_External => -1,
12302 Pragma_Favor_Top_Level => -1,
12303 Pragma_External_Name_Casing => -1,
12304 Pragma_Fast_Math => -1,
12305 Pragma_Finalize_Storage_Only => 0,
12306 Pragma_Float_Representation => 0,
12307 Pragma_Ident => -1,
12308 Pragma_Implemented_By_Entry => -1,
12309 Pragma_Implicit_Packing => 0,
12310 Pragma_Import => +2,
12311 Pragma_Import_Exception => 0,
12312 Pragma_Import_Function => 0,
12313 Pragma_Import_Object => 0,
12314 Pragma_Import_Procedure => 0,
12315 Pragma_Import_Valued_Procedure => 0,
12316 Pragma_Initialize_Scalars => -1,
12317 Pragma_Inline => 0,
12318 Pragma_Inline_Always => 0,
12319 Pragma_Inline_Generic => 0,
12320 Pragma_Inspection_Point => -1,
12321 Pragma_Interface => +2,
12322 Pragma_Interface_Name => +2,
12323 Pragma_Interrupt_Handler => -1,
12324 Pragma_Interrupt_Priority => -1,
12325 Pragma_Interrupt_State => -1,
12326 Pragma_Java_Constructor => -1,
12327 Pragma_Java_Interface => -1,
12328 Pragma_Keep_Names => 0,
12329 Pragma_License => -1,
12330 Pragma_Link_With => -1,
12331 Pragma_Linker_Alias => -1,
12332 Pragma_Linker_Constructor => -1,
12333 Pragma_Linker_Destructor => -1,
12334 Pragma_Linker_Options => -1,
12335 Pragma_Linker_Section => -1,
12337 Pragma_Locking_Policy => -1,
12338 Pragma_Long_Float => -1,
12339 Pragma_Machine_Attribute => -1,
12341 Pragma_Main_Storage => -1,
12342 Pragma_Memory_Size => -1,
12343 Pragma_No_Return => 0,
12344 Pragma_No_Body => 0,
12345 Pragma_No_Run_Time => -1,
12346 Pragma_No_Strict_Aliasing => -1,
12347 Pragma_Normalize_Scalars => -1,
12348 Pragma_Obsolescent => 0,
12349 Pragma_Optimize => -1,
12350 Pragma_Optimize_Alignment => -1,
12353 Pragma_Passive => -1,
12354 Pragma_Preelaborable_Initialization => -1,
12355 Pragma_Polling => -1,
12356 Pragma_Persistent_BSS => 0,
12357 Pragma_Postcondition => -1,
12358 Pragma_Precondition => -1,
12359 Pragma_Preelaborate => -1,
12360 Pragma_Preelaborate_05 => -1,
12361 Pragma_Priority => -1,
12362 Pragma_Priority_Specific_Dispatching => -1,
12363 Pragma_Profile => 0,
12364 Pragma_Profile_Warnings => 0,
12365 Pragma_Propagate_Exceptions => -1,
12366 Pragma_Psect_Object => -1,
12368 Pragma_Pure_05 => -1,
12369 Pragma_Pure_Function => -1,
12370 Pragma_Queuing_Policy => -1,
12371 Pragma_Ravenscar => -1,
12372 Pragma_Relative_Deadline => -1,
12373 Pragma_Remote_Call_Interface => -1,
12374 Pragma_Remote_Types => -1,
12375 Pragma_Restricted_Run_Time => -1,
12376 Pragma_Restriction_Warnings => -1,
12377 Pragma_Restrictions => -1,
12378 Pragma_Reviewable => -1,
12379 Pragma_Share_Generic => -1,
12380 Pragma_Shared => -1,
12381 Pragma_Shared_Passive => -1,
12382 Pragma_Source_File_Name => -1,
12383 Pragma_Source_File_Name_Project => -1,
12384 Pragma_Source_Reference => -1,
12385 Pragma_Storage_Size => -1,
12386 Pragma_Storage_Unit => -1,
12387 Pragma_Static_Elaboration_Desired => -1,
12388 Pragma_Stream_Convert => -1,
12389 Pragma_Style_Checks => -1,
12390 Pragma_Subtitle => -1,
12391 Pragma_Suppress => 0,
12392 Pragma_Suppress_Exception_Locations => 0,
12393 Pragma_Suppress_All => -1,
12394 Pragma_Suppress_Debug_Info => 0,
12395 Pragma_Suppress_Initialization => 0,
12396 Pragma_System_Name => -1,
12397 Pragma_Task_Dispatching_Policy => -1,
12398 Pragma_Task_Info => -1,
12399 Pragma_Task_Name => -1,
12400 Pragma_Task_Storage => 0,
12401 Pragma_Thread_Local_Storage => 0,
12402 Pragma_Time_Slice => -1,
12403 Pragma_Title => -1,
12404 Pragma_Unchecked_Union => 0,
12405 Pragma_Unimplemented_Unit => -1,
12406 Pragma_Universal_Aliasing => -1,
12407 Pragma_Universal_Data => -1,
12408 Pragma_Unmodified => -1,
12409 Pragma_Unreferenced => -1,
12410 Pragma_Unreferenced_Objects => -1,
12411 Pragma_Unreserve_All_Interrupts => -1,
12412 Pragma_Unsuppress => 0,
12413 Pragma_Use_VADS_Size => -1,
12414 Pragma_Validity_Checks => -1,
12415 Pragma_Volatile => 0,
12416 Pragma_Volatile_Components => 0,
12417 Pragma_Warnings => -1,
12418 Pragma_Weak_External => -1,
12419 Pragma_Wide_Character_Encoding => 0,
12420 Unknown_Pragma => 0);
12422 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
12431 if Nkind (P) /= N_Pragma_Argument_Association then
12435 Id := Get_Pragma_Id (Parent (P));
12436 C := Sig_Flags (Id);
12448 -- For pragma Check, the first argument is not significant,
12449 -- the second and the third (if present) arguments are
12452 when Pragma_Check =>
12454 P = First (Pragma_Argument_Associations (Parent (P)));
12457 raise Program_Error;
12461 A := First (Pragma_Argument_Associations (Parent (P)));
12462 for J in 1 .. C - 1 loop
12470 return A = P; -- is this wrong way round ???
12473 end Is_Non_Significant_Pragma_Reference;
12475 ------------------------------
12476 -- Is_Pragma_String_Literal --
12477 ------------------------------
12479 -- This function returns true if the corresponding pragma argument is
12480 -- a static string expression. These are the only cases in which string
12481 -- literals can appear as pragma arguments. We also allow a string
12482 -- literal as the first argument to pragma Assert (although it will
12483 -- of course always generate a type error).
12485 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
12486 Pragn : constant Node_Id := Parent (Par);
12487 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
12488 Pname : constant Name_Id := Pragma_Name (Pragn);
12494 N := First (Assoc);
12501 if Pname = Name_Assert then
12504 elsif Pname = Name_Export then
12507 elsif Pname = Name_Ident then
12510 elsif Pname = Name_Import then
12513 elsif Pname = Name_Interface_Name then
12516 elsif Pname = Name_Linker_Alias then
12519 elsif Pname = Name_Linker_Section then
12522 elsif Pname = Name_Machine_Attribute then
12525 elsif Pname = Name_Source_File_Name then
12528 elsif Pname = Name_Source_Reference then
12531 elsif Pname = Name_Title then
12534 elsif Pname = Name_Subtitle then
12540 end Is_Pragma_String_Literal;
12542 --------------------------------------
12543 -- Process_Compilation_Unit_Pragmas --
12544 --------------------------------------
12546 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
12548 -- A special check for pragma Suppress_All. This is a strange DEC
12549 -- pragma, strange because it comes at the end of the unit. If we
12550 -- have a pragma Suppress_All in the Pragmas_After of the current
12551 -- unit, then we insert a pragma Suppress (All_Checks) at the start
12552 -- of the context clause to ensure the correct processing.
12555 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
12559 if Present (PA) then
12561 while Present (P) loop
12562 if Pragma_Name (P) = Name_Suppress_All then
12563 Prepend_To (Context_Items (N),
12564 Make_Pragma (Sloc (P),
12565 Chars => Name_Suppress,
12566 Pragma_Argument_Associations => New_List (
12567 Make_Pragma_Argument_Association (Sloc (P),
12569 Make_Identifier (Sloc (P),
12570 Chars => Name_All_Checks)))));
12578 end Process_Compilation_Unit_Pragmas;
12589 --------------------------------
12590 -- Set_Encoded_Interface_Name --
12591 --------------------------------
12593 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
12594 Str : constant String_Id := Strval (S);
12595 Len : constant Int := String_Length (Str);
12600 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
12603 -- Stores encoded value of character code CC. The encoding we
12604 -- use an underscore followed by four lower case hex digits.
12610 procedure Encode is
12612 Store_String_Char (Get_Char_Code ('_'));
12614 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
12616 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
12618 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
12620 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
12623 -- Start of processing for Set_Encoded_Interface_Name
12626 -- If first character is asterisk, this is a link name, and we
12627 -- leave it completely unmodified. We also ignore null strings
12628 -- (the latter case happens only in error cases) and no encoding
12629 -- should occur for Java or AAMP interface names.
12632 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
12633 or else VM_Target /= No_VM
12634 or else AAMP_On_Target
12636 Set_Interface_Name (E, S);
12641 CC := Get_String_Char (Str, J);
12643 exit when not In_Character_Range (CC);
12645 C := Get_Character (CC);
12647 exit when C /= '_' and then C /= '$'
12648 and then C not in '0' .. '9'
12649 and then C not in 'a' .. 'z'
12650 and then C not in 'A' .. 'Z';
12653 Set_Interface_Name (E, S);
12661 -- Here we need to encode. The encoding we use as follows:
12662 -- three underscores + four hex digits (lower case)
12666 for J in 1 .. String_Length (Str) loop
12667 CC := Get_String_Char (Str, J);
12669 if not In_Character_Range (CC) then
12672 C := Get_Character (CC);
12674 if C = '_' or else C = '$'
12675 or else C in '0' .. '9'
12676 or else C in 'a' .. 'z'
12677 or else C in 'A' .. 'Z'
12679 Store_String_Char (CC);
12686 Set_Interface_Name (E,
12687 Make_String_Literal (Sloc (S),
12688 Strval => End_String));
12690 end Set_Encoded_Interface_Name;
12692 -------------------
12693 -- Set_Unit_Name --
12694 -------------------
12696 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
12701 if Nkind (N) = N_Identifier
12702 and then Nkind (With_Item) = N_Identifier
12704 Set_Entity (N, Entity (With_Item));
12706 elsif Nkind (N) = N_Selected_Component then
12707 Change_Selected_Component_To_Expanded_Name (N);
12708 Set_Entity (N, Entity (With_Item));
12709 Set_Entity (Selector_Name (N), Entity (N));
12711 Pref := Prefix (N);
12712 Scop := Scope (Entity (N));
12713 while Nkind (Pref) = N_Selected_Component loop
12714 Change_Selected_Component_To_Expanded_Name (Pref);
12715 Set_Entity (Selector_Name (Pref), Scop);
12716 Set_Entity (Pref, Scop);
12717 Pref := Prefix (Pref);
12718 Scop := Scope (Scop);
12721 Set_Entity (Pref, Scop);