1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2004, 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 -- This unit contains the semantic processing for all pragmas, both language
28 -- and implementation defined. For most pragmas, the parser only does the
29 -- most basic job of checking the syntax, so Sem_Prag also contains the code
30 -- to complete the syntax checks. Certain pragmas are handled partially or
31 -- completely by the parser (see Par.Prag for further details).
33 with Atree; use Atree;
34 with Casing; use Casing;
35 with Csets; use Csets;
36 with Debug; use Debug;
37 with Einfo; use Einfo;
38 with Elists; use Elists;
39 with Errout; use Errout;
40 with Expander; use Expander;
41 with Exp_Dist; use Exp_Dist;
42 with Fname; use Fname;
43 with Hostparm; use Hostparm;
45 with Lib.Writ; use Lib.Writ;
46 with Lib.Xref; use Lib.Xref;
47 with Namet; use Namet;
48 with Nlists; use Nlists;
49 with Nmake; use Nmake;
51 with Output; use Output;
52 with Restrict; use Restrict;
53 with Rident; use Rident;
54 with Rtsfind; use Rtsfind;
56 with Sem_Ch3; use Sem_Ch3;
57 with Sem_Ch8; use Sem_Ch8;
58 with Sem_Ch13; use Sem_Ch13;
59 with Sem_Disp; use Sem_Disp;
60 with Sem_Elim; use Sem_Elim;
61 with Sem_Eval; use Sem_Eval;
62 with Sem_Intr; use Sem_Intr;
63 with Sem_Mech; use Sem_Mech;
64 with Sem_Res; use Sem_Res;
65 with Sem_Type; use Sem_Type;
66 with Sem_Util; use Sem_Util;
67 with Sem_VFpt; use Sem_VFpt;
68 with 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;
75 with Targparm; use Targparm;
76 with Tbuild; use Tbuild;
78 with Uintp; use Uintp;
79 with Urealp; use Urealp;
80 with Validsw; use Validsw;
82 with GNAT.Spelling_Checker; use GNAT.Spelling_Checker;
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 -- Local Subprograms and Variables --
143 -------------------------------------
145 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
146 -- This routine is used for possible casing adjustment of an explicit
147 -- external name supplied as a string literal (the node N), according
148 -- to the casing requirement of Opt.External_Name_Casing. If this is
149 -- set to As_Is, then the string literal is returned unchanged, but if
150 -- it is set to Uppercase or Lowercase, then a new string literal with
151 -- appropriate casing is constructed.
153 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
154 -- If Def_Id refers to a renamed subprogram, then the base subprogram
155 -- (the original one, following the renaming chain) is returned.
156 -- Otherwise the entity is returned unchanged. Should be in Einfo???
158 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
159 -- Place semantic information on the argument of an Elaborate or
160 -- Elaborate_All pragma. Entity name for unit and its parents is
161 -- taken from item in previous with_clause that mentions the unit.
163 -------------------------------
164 -- Adjust_External_Name_Case --
165 -------------------------------
167 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
171 -- Adjust case of literal if required
173 if Opt.External_Name_Exp_Casing = As_Is then
177 -- Copy existing string
183 for J in 1 .. String_Length (Strval (N)) loop
184 CC := Get_String_Char (Strval (N), J);
186 if Opt.External_Name_Exp_Casing = Uppercase
187 and then CC >= Get_Char_Code ('a')
188 and then CC <= Get_Char_Code ('z')
190 Store_String_Char (CC - 32);
192 elsif Opt.External_Name_Exp_Casing = Lowercase
193 and then CC >= Get_Char_Code ('A')
194 and then CC <= Get_Char_Code ('Z')
196 Store_String_Char (CC + 32);
199 Store_String_Char (CC);
204 Make_String_Literal (Sloc (N),
205 Strval => End_String);
207 end Adjust_External_Name_Case;
213 procedure Analyze_Pragma (N : Node_Id) is
214 Loc : constant Source_Ptr := Sloc (N);
217 Pragma_Exit : exception;
218 -- This exception is used to exit pragma processing completely. It
219 -- is used when an error is detected, and in other situations where
220 -- it is known that no further processing is required.
223 -- Number of pragma argument associations
229 -- First four pragma arguments (pragma argument association nodes,
230 -- or Empty if the corresponding argument does not exist).
232 procedure Check_Ada_83_Warning;
233 -- Issues a warning message for the current pragma if operating in Ada
234 -- 83 mode (used for language pragmas that are not a standard part of
235 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
238 procedure Check_Arg_Count (Required : Nat);
239 -- Check argument count for pragma is equal to given parameter.
240 -- If not, then issue an error message and raise Pragma_Exit.
242 -- Note: all routines whose name is Check_Arg_Is_xxx take an
243 -- argument Arg which can either be a pragma argument association,
244 -- in which case the check is applied to the expression of the
245 -- association or an expression directly.
247 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
248 -- Check the specified argument Arg to make sure that it is an
249 -- identifier. If not give error and raise Pragma_Exit.
251 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
252 -- Check the specified argument Arg to make sure that it is an
253 -- integer literal. If not give error and raise Pragma_Exit.
255 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
256 -- Check the specified argument Arg to make sure that it has the
257 -- proper syntactic form for a local name and meets the semantic
258 -- requirements for a local name. The local name is analyzed as
259 -- part of the processing for this call. In addition, the local
260 -- name is required to represent an entity at the library level.
262 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
263 -- Check the specified argument Arg to make sure that it has the
264 -- proper syntactic form for a local name and meets the semantic
265 -- requirements for a local name. The local name is analyzed as
266 -- part of the processing for this call.
268 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
269 -- Check the specified argument Arg to make sure that it is a valid
270 -- locking policy name. If not give error and raise Pragma_Exit.
272 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
273 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
274 -- Check the specified argument Arg to make sure that it is an
275 -- identifier whose name matches either N1 or N2 (or N3 if present).
276 -- If not then give error and raise Pragma_Exit.
278 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
279 -- Check the specified argument Arg to make sure that it is a valid
280 -- queuing policy name. If not give error and raise Pragma_Exit.
282 procedure Check_Arg_Is_Static_Expression
285 -- Check the specified argument Arg to make sure that it is a static
286 -- expression of the given type (i.e. it will be analyzed and resolved
287 -- using this type, which can be any valid argument to Resolve, e.g.
288 -- Any_Integer is OK). If not, given error and raise Pragma_Exit.
290 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
291 -- Check the specified argument Arg to make sure that it is a
292 -- string literal. If not give error and raise Pragma_Exit
294 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
295 -- Check the specified argument Arg to make sure that it is a valid
296 -- valid task dispatching policy name. If not give error and raise
299 procedure Check_At_Least_N_Arguments (N : Nat);
300 -- Check there are at least N arguments present
302 procedure Check_At_Most_N_Arguments (N : Nat);
303 -- Check there are no more than N arguments present
305 procedure Check_First_Subtype (Arg : Node_Id);
306 -- Checks that Arg, whose expression is an entity name referencing
307 -- a subtype, does not reference a type that is not a first subtype.
309 procedure Check_In_Main_Program;
310 -- Common checks for pragmas that appear within a main program
311 -- (Priority, Main_Storage, Time_Slice).
313 procedure Check_Interrupt_Or_Attach_Handler;
314 -- Common processing for first argument of pragma Interrupt_Handler
315 -- or pragma Attach_Handler.
317 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
318 -- Check that pragma appears in a declarative part, or in a package
319 -- specification, i.e. that it does not occur in a statement sequence
322 procedure Check_No_Identifier (Arg : Node_Id);
323 -- Checks that the given argument does not have an identifier. If
324 -- an identifier is present, then an error message is issued, and
325 -- Pragma_Exit is raised.
327 procedure Check_No_Identifiers;
328 -- Checks that none of the arguments to the pragma has an identifier.
329 -- If any argument has an identifier, then an error message is issued,
330 -- and Pragma_Exit is raised.
332 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
333 -- Checks if the given argument has an identifier, and if so, requires
334 -- it to match the given identifier name. If there is a non-matching
335 -- identifier, then an error message is given and Error_Pragmas raised.
337 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
338 -- Checks if the given argument has an identifier, and if so, requires
339 -- it to match the given identifier name. If there is a non-matching
340 -- identifier, then an error message is given and Error_Pragmas raised.
341 -- In this version of the procedure, the identifier name is given as
342 -- a string with lower case letters.
344 procedure Check_Static_Constraint (Constr : Node_Id);
345 -- Constr is a constraint from an N_Subtype_Indication node from a
346 -- component constraint in an Unchecked_Union type. This routine checks
347 -- that the constraint is static as required by the restrictions for
350 procedure Check_Valid_Configuration_Pragma;
351 -- Legality checks for placement of a configuration pragma
353 procedure Check_Valid_Library_Unit_Pragma;
354 -- Legality checks for library unit pragmas. A special case arises for
355 -- pragmas in generic instances that come from copies of the original
356 -- library unit pragmas in the generic templates. In the case of other
357 -- than library level instantiations these can appear in contexts which
358 -- would normally be invalid (they only apply to the original template
359 -- and to library level instantiations), and they are simply ignored,
360 -- which is implemented by rewriting them as null statements.
362 procedure Error_Pragma (Msg : String);
363 pragma No_Return (Error_Pragma);
364 -- Outputs error message for current pragma. The message contains an %
365 -- that will be replaced with the pragma name, and the flag is placed
366 -- on the pragma itself. Pragma_Exit is then raised.
368 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
369 pragma No_Return (Error_Pragma_Arg);
370 -- Outputs error message for current pragma. The message may contain
371 -- a % that will be replaced with the pragma name. The parameter Arg
372 -- may either be a pragma argument association, in which case the flag
373 -- is placed on the expression of this association, or an expression,
374 -- in which case the flag is placed directly on the expression. The
375 -- message is placed using Error_Msg_N, so the message may also contain
376 -- an & insertion character which will reference the given Arg value.
377 -- After placing the message, Pragma_Exit is raised.
379 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
380 pragma No_Return (Error_Pragma_Arg);
381 -- Similar to above form of Error_Pragma_Arg except that two messages
382 -- are provided, the second is a continuation comment starting with \.
384 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
385 pragma No_Return (Error_Pragma_Arg_Ident);
386 -- Outputs error message for current pragma. The message may contain
387 -- a % that will be replaced with the pragma name. The parameter Arg
388 -- must be a pragma argument association with a non-empty identifier
389 -- (i.e. its Chars field must be set), and the error message is placed
390 -- on the identifier. The message is placed using Error_Msg_N so
391 -- the message may also contain an & insertion character which will
392 -- reference the identifier. After placing the message, Pragma_Exit
395 function Find_Lib_Unit_Name return Entity_Id;
396 -- Used for a library unit pragma to find the entity to which the
397 -- library unit pragma applies, returns the entity found.
399 procedure Find_Program_Unit_Name (Id : Node_Id);
400 -- If the pragma is a compilation unit pragma, the id must denote the
401 -- compilation unit in the same compilation, and the pragma must appear
402 -- in the list of preceding or trailing pragmas. If it is a program
403 -- unit pragma that is not a compilation unit pragma, then the
404 -- identifier must be visible.
406 type Name_List is array (Natural range <>) of Name_Id;
407 type Args_List is array (Natural range <>) of Node_Id;
408 procedure Gather_Associations
410 Args : out Args_List);
411 -- This procedure is used to gather the arguments for a pragma that
412 -- permits arbitrary ordering of parameters using the normal rules
413 -- for named and positional parameters. The Names argument is a list
414 -- of Name_Id values that corresponds to the allowed pragma argument
415 -- association identifiers in order. The result returned in Args is
416 -- a list of corresponding expressions that are the pragma arguments.
417 -- Note that this is a list of expressions, not of pragma argument
418 -- associations (Gather_Associations has completely checked all the
419 -- optional identifiers when it returns). An entry in Args is Empty
420 -- on return if the corresponding argument is not present.
422 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
423 -- All the routines that check pragma arguments take either a pragma
424 -- argument association (in which case the expression of the argument
425 -- association is checked), or the expression directly. The function
426 -- Get_Pragma_Arg is a utility used to deal with these two cases. If
427 -- Arg is a pragma argument association node, then its expression is
428 -- returned, otherwise Arg is returned unchanged.
430 procedure GNAT_Pragma;
431 -- Called for all GNAT defined pragmas to note the use of the feature,
432 -- and also check the relevant restriction (No_Implementation_Pragmas).
434 function Is_Before_First_Decl
435 (Pragma_Node : Node_Id;
436 Decls : List_Id) return Boolean;
437 -- Return True if Pragma_Node is before the first declarative item in
438 -- Decls where Decls is the list of declarative items.
440 function Is_Configuration_Pragma return Boolean;
441 -- Deterermines if the placement of the current pragma is appropriate
442 -- for a configuration pragma (precedes the current compilation unit)
444 procedure Pragma_Misplaced;
445 -- Issue fatal error message for misplaced pragma
447 procedure Process_Atomic_Shared_Volatile;
448 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
449 -- Shared is an obsolete Ada 83 pragma, treated as being identical
450 -- in effect to pragma Atomic.
452 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
453 -- Common procesing for Convention, Interface, Import and Export.
454 -- Checks first two arguments of pragma, and sets the appropriate
455 -- convention value in the specified entity or entities. On return
456 -- C is the convention, E is the referenced entity.
458 procedure Process_Extended_Import_Export_Exception_Pragma
459 (Arg_Internal : Node_Id;
460 Arg_External : Node_Id;
463 -- Common processing for the pragmas Import/Export_Exception.
464 -- The three arguments correspond to the three named parameters of
465 -- the pragma. An argument is empty if the corresponding parameter
466 -- is not present in the pragma.
468 procedure Process_Extended_Import_Export_Object_Pragma
469 (Arg_Internal : Node_Id;
470 Arg_External : Node_Id;
472 -- Common processing for the pragmass Import/Export_Object.
473 -- The three arguments correspond to the three named parameters
474 -- of the pragmas. An argument is empty if the corresponding
475 -- parameter is not present in the pragma.
477 procedure Process_Extended_Import_Export_Internal_Arg
478 (Arg_Internal : Node_Id := Empty);
479 -- Common processing for all extended Import and Export pragmas. The
480 -- argument is the pragma parameter for the Internal argument. If
481 -- Arg_Internal is empty or inappropriate, an error message is posted.
482 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
483 -- set to identify the referenced entity.
485 procedure Process_Extended_Import_Export_Subprogram_Pragma
486 (Arg_Internal : Node_Id;
487 Arg_External : Node_Id;
488 Arg_Parameter_Types : Node_Id;
489 Arg_Result_Type : Node_Id := Empty;
490 Arg_Mechanism : Node_Id;
491 Arg_Result_Mechanism : Node_Id := Empty;
492 Arg_First_Optional_Parameter : Node_Id := Empty);
493 -- Common processing for all extended Import and Export pragmas
494 -- applying to subprograms. The caller omits any arguments that do
495 -- bnot apply to the pragma in question (for example, Arg_Result_Type
496 -- can be non-Empty only in the Import_Function and Export_Function
497 -- cases). The argument names correspond to the allowed pragma
498 -- association identifiers.
500 procedure Process_Generic_List;
501 -- Common processing for Share_Generic and Inline_Generic
503 procedure Process_Import_Or_Interface;
504 -- Common processing for Import of Interface
506 procedure Process_Inline (Active : Boolean);
507 -- Common processing for Inline and Inline_Always. The parameter
508 -- indicates if the inline pragma is active, i.e. if it should
509 -- actually cause inlining to occur.
511 procedure Process_Interface_Name
512 (Subprogram_Def : Entity_Id;
515 -- Given the last two arguments of pragma Import, pragma Export, or
516 -- pragma Interface_Name, performs validity checks and sets the
517 -- Interface_Name field of the given subprogram entity to the
518 -- appropriate external or link name, depending on the arguments
519 -- given. Ext_Arg is always present, but Link_Arg may be missing.
520 -- Note that Ext_Arg may represent the Link_Name if Link_Arg is
521 -- missing, and appropriate named notation is used for Ext_Arg.
522 -- If neither Ext_Arg nor Link_Arg is present, the interface name
523 -- is set to the default from the subprogram name.
525 procedure Process_Interrupt_Or_Attach_Handler;
526 -- Common processing for Interrupt and Attach_Handler pragmas
528 procedure Process_Restrictions_Or_Restriction_Warnings;
529 -- Common processing for Restrictions and Restriction_Warnings pragmas
531 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
532 -- Common processing for Suppress and Unsuppress. The boolean parameter
533 -- Suppress_Case is True for the Suppress case, and False for the
536 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
537 -- This procedure sets the Is_Exported flag for the given entity,
538 -- checking that the entity was not previously imported. Arg is
539 -- the argument that specified the entity. A check is also made
540 -- for exporting inappropriate entities.
542 procedure Set_Extended_Import_Export_External_Name
543 (Internal_Ent : Entity_Id;
544 Arg_External : Node_Id);
545 -- Common processing for all extended import export pragmas. The first
546 -- argument, Internal_Ent, is the internal entity, which has already
547 -- been checked for validity by the caller. Arg_External is from the
548 -- Import or Export pragma, and may be null if no External parameter
549 -- was present. If Arg_External is present and is a non-null string
550 -- (a null string is treated as the default), then the Interface_Name
551 -- field of Internal_Ent is set appropriately.
553 procedure Set_Imported (E : Entity_Id);
554 -- This procedure sets the Is_Imported flag for the given entity,
555 -- checking that it is not previously exported or imported.
557 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
558 -- Mech is a parameter passing mechanism (see Import_Function syntax
559 -- for MECHANISM_NAME). This routine checks that the mechanism argument
560 -- has the right form, and if not issues an error message. If the
561 -- argument has the right form then the Mechanism field of Ent is
562 -- set appropriately.
564 --------------------------
565 -- Check_Ada_83_Warning --
566 --------------------------
568 procedure Check_Ada_83_Warning is
570 if Ada_83 and then Comes_From_Source (N) then
571 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
573 end Check_Ada_83_Warning;
575 ---------------------
576 -- Check_Arg_Count --
577 ---------------------
579 procedure Check_Arg_Count (Required : Nat) is
581 if Arg_Count /= Required then
582 Error_Pragma ("wrong number of arguments for pragma%");
586 -----------------------------
587 -- Check_Arg_Is_Identifier --
588 -----------------------------
590 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
591 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
594 if Nkind (Argx) /= N_Identifier then
596 ("argument for pragma% must be identifier", Argx);
598 end Check_Arg_Is_Identifier;
600 ----------------------------------
601 -- Check_Arg_Is_Integer_Literal --
602 ----------------------------------
604 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
605 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
608 if Nkind (Argx) /= N_Integer_Literal then
610 ("argument for pragma% must be integer literal", Argx);
612 end Check_Arg_Is_Integer_Literal;
614 -------------------------------------------
615 -- Check_Arg_Is_Library_Level_Local_Name --
616 -------------------------------------------
620 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
621 -- | library_unit_NAME
623 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
625 Check_Arg_Is_Local_Name (Arg);
627 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
628 and then Comes_From_Source (N)
631 ("argument for pragma% must be library level entity", Arg);
633 end Check_Arg_Is_Library_Level_Local_Name;
635 -----------------------------
636 -- Check_Arg_Is_Local_Name --
637 -----------------------------
641 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
642 -- | library_unit_NAME
644 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
645 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
650 if Nkind (Argx) not in N_Direct_Name
651 and then (Nkind (Argx) /= N_Attribute_Reference
652 or else Present (Expressions (Argx))
653 or else Nkind (Prefix (Argx)) /= N_Identifier)
654 and then (not Is_Entity_Name (Argx)
655 or else not Is_Compilation_Unit (Entity (Argx)))
657 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
660 if Is_Entity_Name (Argx)
661 and then Scope (Entity (Argx)) /= Current_Scope
664 ("pragma% argument must be in same declarative part", Arg);
666 end Check_Arg_Is_Local_Name;
668 ---------------------------------
669 -- Check_Arg_Is_Locking_Policy --
670 ---------------------------------
672 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
673 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
676 Check_Arg_Is_Identifier (Argx);
678 if not Is_Locking_Policy_Name (Chars (Argx)) then
680 ("& is not a valid locking policy name", Argx);
682 end Check_Arg_Is_Locking_Policy;
684 -------------------------
685 -- Check_Arg_Is_One_Of --
686 -------------------------
688 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
689 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
692 Check_Arg_Is_Identifier (Argx);
694 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
695 Error_Msg_Name_2 := N1;
696 Error_Msg_Name_3 := N2;
697 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
699 end Check_Arg_Is_One_Of;
701 procedure Check_Arg_Is_One_Of
703 N1, N2, N3 : Name_Id)
705 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
708 Check_Arg_Is_Identifier (Argx);
710 if Chars (Argx) /= N1
711 and then Chars (Argx) /= N2
712 and then Chars (Argx) /= N3
714 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
716 end Check_Arg_Is_One_Of;
718 ---------------------------------
719 -- Check_Arg_Is_Queuing_Policy --
720 ---------------------------------
722 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
723 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
726 Check_Arg_Is_Identifier (Argx);
728 if not Is_Queuing_Policy_Name (Chars (Argx)) then
730 ("& is not a valid queuing policy name", Argx);
732 end Check_Arg_Is_Queuing_Policy;
734 ------------------------------------
735 -- Check_Arg_Is_Static_Expression --
736 ------------------------------------
738 procedure Check_Arg_Is_Static_Expression
742 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
745 Analyze_And_Resolve (Argx, Typ);
747 if Is_OK_Static_Expression (Argx) then
750 elsif Etype (Argx) = Any_Type then
753 -- An interesting special case, if we have a string literal and
754 -- we are in Ada 83 mode, then we allow it even though it will
755 -- not be flagged as static. This allows the use of Ada 95
756 -- pragmas like Import in Ada 83 mode. They will of course be
757 -- flagged with warnings as usual, but will not cause errors.
759 elsif Ada_83 and then Nkind (Argx) = N_String_Literal then
762 -- Static expression that raises Constraint_Error. This has
763 -- already been flagged, so just exit from pragma processing.
765 elsif Is_Static_Expression (Argx) then
768 -- Finally, we have a real error
771 Error_Msg_Name_1 := Chars (N);
773 ("argument for pragma% must be a static expression!", Argx);
776 end Check_Arg_Is_Static_Expression;
778 ---------------------------------
779 -- Check_Arg_Is_String_Literal --
780 ---------------------------------
782 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
783 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
786 if Nkind (Argx) /= N_String_Literal then
788 ("argument for pragma% must be string literal", Argx);
791 end Check_Arg_Is_String_Literal;
793 ------------------------------------------
794 -- Check_Arg_Is_Task_Dispatching_Policy --
795 ------------------------------------------
797 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
798 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
801 Check_Arg_Is_Identifier (Argx);
803 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
805 ("& is not a valid task dispatching policy name", Argx);
807 end Check_Arg_Is_Task_Dispatching_Policy;
809 --------------------------------
810 -- Check_At_Least_N_Arguments --
811 --------------------------------
813 procedure Check_At_Least_N_Arguments (N : Nat) is
815 if Arg_Count < N then
816 Error_Pragma ("too few arguments for pragma%");
818 end Check_At_Least_N_Arguments;
820 -------------------------------
821 -- Check_At_Most_N_Arguments --
822 -------------------------------
824 procedure Check_At_Most_N_Arguments (N : Nat) is
828 if Arg_Count > N then
833 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
836 end Check_At_Most_N_Arguments;
838 -------------------------
839 -- Check_First_Subtype --
840 -------------------------
842 procedure Check_First_Subtype (Arg : Node_Id) is
843 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
846 if not Is_First_Subtype (Entity (Argx)) then
848 ("pragma% cannot apply to subtype", Argx);
850 end Check_First_Subtype;
852 ---------------------------
853 -- Check_In_Main_Program --
854 ---------------------------
856 procedure Check_In_Main_Program is
857 P : constant Node_Id := Parent (N);
860 -- Must be at in subprogram body
862 if Nkind (P) /= N_Subprogram_Body then
863 Error_Pragma ("% pragma allowed only in subprogram");
865 -- Otherwise warn if obviously not main program
867 elsif Present (Parameter_Specifications (Specification (P)))
868 or else not Is_Compilation_Unit (Defining_Entity (P))
870 Error_Msg_Name_1 := Chars (N);
872 ("?pragma% is only effective in main program", N);
874 end Check_In_Main_Program;
876 ---------------------------------------
877 -- Check_Interrupt_Or_Attach_Handler --
878 ---------------------------------------
880 procedure Check_Interrupt_Or_Attach_Handler is
881 Arg1_X : constant Node_Id := Expression (Arg1);
886 if not Is_Entity_Name (Arg1_X) then
888 ("argument of pragma% must be entity name", Arg1);
890 elsif Prag_Id = Pragma_Interrupt_Handler then
891 Check_Restriction (No_Dynamic_Attachment, N);
895 Handler_Proc : Entity_Id := Empty;
896 Proc_Scope : Entity_Id;
897 Found : Boolean := False;
900 if not Is_Overloaded (Arg1_X) then
901 Handler_Proc := Entity (Arg1_X);
906 Index : Interp_Index;
909 Get_First_Interp (Arg1_X, Index, It);
910 while Present (It.Nam) loop
911 Handler_Proc := It.Nam;
913 if Ekind (Handler_Proc) = E_Procedure
914 and then No (First_Formal (Handler_Proc))
918 Set_Entity (Arg1_X, Handler_Proc);
919 Set_Is_Overloaded (Arg1_X, False);
922 ("ambiguous handler name for pragma% ", Arg1);
926 Get_Next_Interp (Index, It);
931 ("argument of pragma% must be parameterless procedure",
934 Handler_Proc := Entity (Arg1_X);
939 Proc_Scope := Scope (Handler_Proc);
941 -- On AAMP only, a pragma Interrupt_Handler is supported for
942 -- nonprotected parameterless procedures.
945 and then Prag_Id = Pragma_Interrupt_Handler
947 if Ekind (Handler_Proc) /= E_Procedure then
949 ("argument of pragma% must be a procedure", Arg1);
952 elsif Ekind (Handler_Proc) /= E_Procedure
953 or else Ekind (Proc_Scope) /= E_Protected_Type
956 ("argument of pragma% must be protected procedure", Arg1);
959 if (not AAMP_On_Target or else Prag_Id = Pragma_Attach_Handler)
960 and then Ekind (Proc_Scope) = E_Protected_Type
963 Protected_Definition (Parent (Proc_Scope))
965 Error_Pragma ("pragma% must be in protected definition");
969 if not Is_Library_Level_Entity (Proc_Scope)
970 or else (AAMP_On_Target
971 and then not Is_Library_Level_Entity (Handler_Proc))
974 ("pragma% requires library-level entity", Arg1);
977 if Present (First_Formal (Handler_Proc)) then
979 ("argument of pragma% must be parameterless procedure",
983 end Check_Interrupt_Or_Attach_Handler;
985 -------------------------------------------
986 -- Check_Is_In_Decl_Part_Or_Package_Spec --
987 -------------------------------------------
989 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
998 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1001 elsif Nkind (P) = N_Package_Specification then
1004 elsif Nkind (P) = N_Block_Statement then
1007 -- Note: the following tests seem a little peculiar, because
1008 -- they test for bodies, but if we were in the statement part
1009 -- of the body, we would already have hit the handled statement
1010 -- sequence, so the only way we get here is by being in the
1011 -- declarative part of the body.
1013 elsif Nkind (P) = N_Subprogram_Body
1014 or else Nkind (P) = N_Package_Body
1015 or else Nkind (P) = N_Task_Body
1016 or else Nkind (P) = N_Entry_Body
1024 Error_Pragma ("pragma% is not in declarative part or package spec");
1025 end Check_Is_In_Decl_Part_Or_Package_Spec;
1027 -------------------------
1028 -- Check_No_Identifier --
1029 -------------------------
1031 procedure Check_No_Identifier (Arg : Node_Id) is
1033 if Chars (Arg) /= No_Name then
1034 Error_Pragma_Arg_Ident
1035 ("pragma% does not permit identifier& here", Arg);
1037 end Check_No_Identifier;
1039 --------------------------
1040 -- Check_No_Identifiers --
1041 --------------------------
1043 procedure Check_No_Identifiers is
1047 if Arg_Count > 0 then
1050 while Present (Arg_Node) loop
1051 Check_No_Identifier (Arg_Node);
1055 end Check_No_Identifiers;
1057 -------------------------------
1058 -- Check_Optional_Identifier --
1059 -------------------------------
1061 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1063 if Present (Arg) and then Chars (Arg) /= No_Name then
1064 if Chars (Arg) /= Id then
1065 Error_Msg_Name_1 := Chars (N);
1066 Error_Msg_Name_2 := Id;
1067 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1071 end Check_Optional_Identifier;
1073 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1075 Name_Buffer (1 .. Id'Length) := Id;
1076 Name_Len := Id'Length;
1077 Check_Optional_Identifier (Arg, Name_Find);
1078 end Check_Optional_Identifier;
1080 -----------------------------
1081 -- Check_Static_Constraint --
1082 -----------------------------
1084 -- Note: for convenience in writing this procedure, in addition to
1085 -- the officially (i.e. by spec) allowed argument which is always
1086 -- a constraint, it also allows ranges and discriminant associations.
1087 -- Above is not clear ???
1089 procedure Check_Static_Constraint (Constr : Node_Id) is
1091 --------------------
1092 -- Require_Static --
1093 --------------------
1095 procedure Require_Static (E : Node_Id);
1096 -- Require given expression to be static expression
1098 procedure Require_Static (E : Node_Id) is
1100 if not Is_OK_Static_Expression (E) then
1101 Flag_Non_Static_Expr
1102 ("non-static constraint not allowed in Unchecked_Union!", E);
1107 -- Start of processing for Check_Static_Constraint
1110 case Nkind (Constr) is
1111 when N_Discriminant_Association =>
1112 Require_Static (Expression (Constr));
1115 Require_Static (Low_Bound (Constr));
1116 Require_Static (High_Bound (Constr));
1118 when N_Attribute_Reference =>
1119 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1120 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1122 when N_Range_Constraint =>
1123 Check_Static_Constraint (Range_Expression (Constr));
1125 when N_Index_Or_Discriminant_Constraint =>
1127 IDC : Entity_Id := First (Constraints (Constr));
1129 while Present (IDC) loop
1130 Check_Static_Constraint (IDC);
1138 end Check_Static_Constraint;
1140 --------------------------------------
1141 -- Check_Valid_Configuration_Pragma --
1142 --------------------------------------
1144 -- A configuration pragma must appear in the context clause of
1145 -- a compilation unit, at the start of the list (i.e. only other
1146 -- pragmas may precede it).
1148 procedure Check_Valid_Configuration_Pragma is
1150 if not Is_Configuration_Pragma then
1151 Error_Pragma ("incorrect placement for configuration pragma%");
1153 end Check_Valid_Configuration_Pragma;
1155 -------------------------------------
1156 -- Check_Valid_Library_Unit_Pragma --
1157 -------------------------------------
1159 procedure Check_Valid_Library_Unit_Pragma is
1161 Parent_Node : Node_Id;
1162 Unit_Name : Entity_Id;
1163 Unit_Kind : Node_Kind;
1164 Unit_Node : Node_Id;
1165 Sindex : Source_File_Index;
1168 if not Is_List_Member (N) then
1172 Plist := List_Containing (N);
1173 Parent_Node := Parent (Plist);
1175 if Parent_Node = Empty then
1178 -- Case of pragma appearing after a compilation unit. In this
1179 -- case it must have an argument with the corresponding name
1180 -- and must be part of the following pragmas of its parent.
1182 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1183 if Plist /= Pragmas_After (Parent_Node) then
1186 elsif Arg_Count = 0 then
1188 ("argument required if outside compilation unit");
1191 Check_No_Identifiers;
1192 Check_Arg_Count (1);
1193 Unit_Node := Unit (Parent (Parent_Node));
1194 Unit_Kind := Nkind (Unit_Node);
1196 Analyze (Expression (Arg1));
1198 if Unit_Kind = N_Generic_Subprogram_Declaration
1199 or else Unit_Kind = N_Subprogram_Declaration
1201 Unit_Name := Defining_Entity (Unit_Node);
1203 elsif Unit_Kind = N_Function_Instantiation
1204 or else Unit_Kind = N_Package_Instantiation
1205 or else Unit_Kind = N_Procedure_Instantiation
1207 Unit_Name := Defining_Entity (Unit_Node);
1210 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1213 if Chars (Unit_Name) /=
1214 Chars (Entity (Expression (Arg1)))
1217 ("pragma% argument is not current unit name", Arg1);
1220 if Ekind (Unit_Name) = E_Package
1221 and then Present (Renamed_Entity (Unit_Name))
1223 Error_Pragma ("pragma% not allowed for renamed package");
1227 -- Pragma appears other than after a compilation unit
1230 -- Here we check for the generic instantiation case and also
1231 -- for the case of processing a generic formal package. We
1232 -- detect these cases by noting that the Sloc on the node
1233 -- does not belong to the current compilation unit.
1235 Sindex := Source_Index (Current_Sem_Unit);
1237 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1238 Rewrite (N, Make_Null_Statement (Loc));
1241 -- If before first declaration, the pragma applies to the
1242 -- enclosing unit, and the name if present must be this name.
1244 elsif Is_Before_First_Decl (N, Plist) then
1245 Unit_Node := Unit_Declaration_Node (Current_Scope);
1246 Unit_Kind := Nkind (Unit_Node);
1248 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1251 elsif Unit_Kind = N_Subprogram_Body
1252 and then not Acts_As_Spec (Unit_Node)
1256 elsif Nkind (Parent_Node) = N_Package_Body then
1259 elsif Nkind (Parent_Node) = N_Package_Specification
1260 and then Plist = Private_Declarations (Parent_Node)
1264 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1265 or else Nkind (Parent_Node)
1266 = N_Generic_Subprogram_Declaration)
1267 and then Plist = Generic_Formal_Declarations (Parent_Node)
1271 elsif Arg_Count > 0 then
1272 Analyze (Expression (Arg1));
1274 if Entity (Expression (Arg1)) /= Current_Scope then
1276 ("name in pragma% must be enclosing unit", Arg1);
1279 -- It is legal to have no argument in this context
1285 -- Error if not before first declaration. This is because a
1286 -- library unit pragma argument must be the name of a library
1287 -- unit (RM 10.1.5(7)), but the only names permitted in this
1288 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1289 -- generic subprogram declarations or generic instantiations.
1293 ("pragma% misplaced, must be before first declaration");
1297 end Check_Valid_Library_Unit_Pragma;
1303 procedure Error_Pragma (Msg : String) is
1305 Error_Msg_Name_1 := Chars (N);
1306 Error_Msg_N (Msg, N);
1310 ----------------------
1311 -- Error_Pragma_Arg --
1312 ----------------------
1314 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1316 Error_Msg_Name_1 := Chars (N);
1317 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1319 end Error_Pragma_Arg;
1321 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1323 Error_Msg_Name_1 := Chars (N);
1324 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1325 Error_Pragma_Arg (Msg2, Arg);
1326 end Error_Pragma_Arg;
1328 ----------------------------
1329 -- Error_Pragma_Arg_Ident --
1330 ----------------------------
1332 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1334 Error_Msg_Name_1 := Chars (N);
1335 Error_Msg_N (Msg, Arg);
1337 end Error_Pragma_Arg_Ident;
1339 ------------------------
1340 -- Find_Lib_Unit_Name --
1341 ------------------------
1343 function Find_Lib_Unit_Name return Entity_Id is
1345 -- Return inner compilation unit entity, for case of nested
1346 -- categorization pragmas. This happens in generic unit.
1348 if Nkind (Parent (N)) = N_Package_Specification
1349 and then Defining_Entity (Parent (N)) /= Current_Scope
1351 return Defining_Entity (Parent (N));
1353 return Current_Scope;
1355 end Find_Lib_Unit_Name;
1357 ----------------------------
1358 -- Find_Program_Unit_Name --
1359 ----------------------------
1361 procedure Find_Program_Unit_Name (Id : Node_Id) is
1362 Unit_Name : Entity_Id;
1363 Unit_Kind : Node_Kind;
1364 P : constant Node_Id := Parent (N);
1367 if Nkind (P) = N_Compilation_Unit then
1368 Unit_Kind := Nkind (Unit (P));
1370 if Unit_Kind = N_Subprogram_Declaration
1371 or else Unit_Kind = N_Package_Declaration
1372 or else Unit_Kind in N_Generic_Declaration
1374 Unit_Name := Defining_Entity (Unit (P));
1376 if Chars (Id) = Chars (Unit_Name) then
1377 Set_Entity (Id, Unit_Name);
1378 Set_Etype (Id, Etype (Unit_Name));
1380 Set_Etype (Id, Any_Type);
1382 ("cannot find program unit referenced by pragma%");
1386 Set_Etype (Id, Any_Type);
1387 Error_Pragma ("pragma% inapplicable to this unit");
1394 end Find_Program_Unit_Name;
1396 -------------------------
1397 -- Gather_Associations --
1398 -------------------------
1400 procedure Gather_Associations
1402 Args : out Args_List)
1407 -- Initialize all parameters to Empty
1409 for J in Args'Range loop
1413 -- That's all we have to do if there are no argument associations
1415 if No (Pragma_Argument_Associations (N)) then
1419 -- Otherwise first deal with any positional parameters present
1421 Arg := First (Pragma_Argument_Associations (N));
1423 for Index in Args'Range loop
1424 exit when No (Arg) or else Chars (Arg) /= No_Name;
1425 Args (Index) := Expression (Arg);
1429 -- Positional parameters all processed, if any left, then we
1430 -- have too many positional parameters.
1432 if Present (Arg) and then Chars (Arg) = No_Name then
1434 ("too many positional associations for pragma%", Arg);
1437 -- Process named parameters if any are present
1439 while Present (Arg) loop
1440 if Chars (Arg) = No_Name then
1442 ("positional association cannot follow named association",
1446 for Index in Names'Range loop
1447 if Names (Index) = Chars (Arg) then
1448 if Present (Args (Index)) then
1450 ("duplicate argument association for pragma%", Arg);
1452 Args (Index) := Expression (Arg);
1457 if Index = Names'Last then
1458 Error_Msg_Name_1 := Chars (N);
1459 Error_Msg_N ("pragma% does not allow & argument", Arg);
1461 -- Check for possible misspelling
1463 for Index1 in Names'Range loop
1464 if Is_Bad_Spelling_Of
1465 (Get_Name_String (Chars (Arg)),
1466 Get_Name_String (Names (Index1)))
1468 Error_Msg_Name_1 := Names (Index1);
1469 Error_Msg_N ("\possible misspelling of%", Arg);
1481 end Gather_Associations;
1483 --------------------
1484 -- Get_Pragma_Arg --
1485 --------------------
1487 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
1489 if Nkind (Arg) = N_Pragma_Argument_Association then
1490 return Expression (Arg);
1500 procedure GNAT_Pragma is
1502 Check_Restriction (No_Implementation_Pragmas, N);
1505 --------------------------
1506 -- Is_Before_First_Decl --
1507 --------------------------
1509 function Is_Before_First_Decl
1510 (Pragma_Node : Node_Id;
1511 Decls : List_Id) return Boolean
1513 Item : Node_Id := First (Decls);
1516 -- Only other pragmas can come before this pragma
1519 if No (Item) or else Nkind (Item) /= N_Pragma then
1522 elsif Item = Pragma_Node then
1528 end Is_Before_First_Decl;
1530 -----------------------------
1531 -- Is_Configuration_Pragma --
1532 -----------------------------
1534 -- A configuration pragma must appear in the context clause of
1535 -- a compilation unit, at the start of the list (i.e. only other
1536 -- pragmas may precede it).
1538 function Is_Configuration_Pragma return Boolean is
1539 Lis : constant List_Id := List_Containing (N);
1540 Par : constant Node_Id := Parent (N);
1544 -- If no parent, then we are in the configuration pragma file,
1545 -- so the placement is definitely appropriate.
1550 -- Otherwise we must be in the context clause of a compilation unit
1551 -- and the only thing allowed before us in the context list is more
1552 -- configuration pragmas.
1554 elsif Nkind (Par) = N_Compilation_Unit
1555 and then Context_Items (Par) = Lis
1562 elsif Nkind (Prg) /= N_Pragma then
1572 end Is_Configuration_Pragma;
1574 ----------------------
1575 -- Pragma_Misplaced --
1576 ----------------------
1578 procedure Pragma_Misplaced is
1580 Error_Pragma ("incorrect placement of pragma%");
1581 end Pragma_Misplaced;
1583 ------------------------------------
1584 -- Process Atomic_Shared_Volatile --
1585 ------------------------------------
1587 procedure Process_Atomic_Shared_Volatile is
1595 Check_Ada_83_Warning;
1596 Check_No_Identifiers;
1597 Check_Arg_Count (1);
1598 Check_Arg_Is_Local_Name (Arg1);
1599 E_Id := Expression (Arg1);
1601 if Etype (E_Id) = Any_Type then
1606 D := Declaration_Node (E);
1610 if Rep_Item_Too_Early (E, N)
1612 Rep_Item_Too_Late (E, N)
1616 Check_First_Subtype (Arg1);
1619 if Prag_Id /= Pragma_Volatile then
1621 Set_Is_Atomic (Underlying_Type (E));
1624 -- Attribute belongs on the base type. If the
1625 -- view of the type is currently private, it also
1626 -- belongs on the underlying type.
1628 Set_Is_Volatile (Base_Type (E));
1629 Set_Is_Volatile (Underlying_Type (E));
1631 Set_Treat_As_Volatile (E);
1632 Set_Treat_As_Volatile (Underlying_Type (E));
1634 elsif K = N_Object_Declaration
1635 or else (K = N_Component_Declaration
1636 and then Original_Record_Component (E) = E)
1638 if Rep_Item_Too_Late (E, N) then
1642 if Prag_Id /= Pragma_Volatile then
1645 -- If the object declaration has an explicit
1646 -- initialization, a temporary may have to be
1647 -- created to hold the expression, to insure
1648 -- that access to the object remain atomic.
1650 if Nkind (Parent (E)) = N_Object_Declaration
1651 and then Present (Expression (Parent (E)))
1653 Set_Has_Delayed_Freeze (E);
1656 -- An interesting improvement here. If an object of type X
1657 -- is declared atomic, and the type X is not atomic, that's
1658 -- a pity, since it may not have appropraite alignment etc.
1659 -- We can rescue this in the special case where the object
1660 -- and type are in the same unit by just setting the type
1661 -- as atomic, so that the back end will process it as atomic.
1663 Utyp := Underlying_Type (Etype (E));
1666 and then Sloc (E) > No_Location
1667 and then Sloc (Utyp) > No_Location
1669 Get_Source_File_Index (Sloc (E)) =
1670 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
1672 Set_Is_Atomic (Underlying_Type (Etype (E)));
1676 Set_Is_Volatile (E);
1677 Set_Treat_As_Volatile (E);
1681 ("inappropriate entity for pragma%", Arg1);
1683 end Process_Atomic_Shared_Volatile;
1685 ------------------------
1686 -- Process_Convention --
1687 ------------------------
1689 procedure Process_Convention
1690 (C : out Convention_Id;
1696 Comp_Unit : Unit_Number_Type;
1698 procedure Set_Convention_From_Pragma (E : Entity_Id);
1699 -- Set convention in entity E, and also flag that the entity has a
1700 -- convention pragma. If entity is for a private or incomplete type,
1701 -- also set convention and flag on underlying type. This procedure
1702 -- also deals with the special case of C_Pass_By_Copy convention.
1704 --------------------------------
1705 -- Set_Convention_From_Pragma --
1706 --------------------------------
1708 procedure Set_Convention_From_Pragma (E : Entity_Id) is
1710 Set_Convention (E, C);
1711 Set_Has_Convention_Pragma (E);
1713 if Is_Incomplete_Or_Private_Type (E) then
1714 Set_Convention (Underlying_Type (E), C);
1715 Set_Has_Convention_Pragma (Underlying_Type (E), True);
1718 -- A class-wide type should inherit the convention of
1719 -- the specific root type (although this isn't specified
1720 -- clearly by the RM).
1722 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
1723 Set_Convention (Class_Wide_Type (E), C);
1726 -- If the entity is a record type, then check for special case
1727 -- of C_Pass_By_Copy, which is treated the same as C except that
1728 -- the special record flag is set. This convention is also only
1729 -- permitted on record types (see AI95-00131).
1731 if Cname = Name_C_Pass_By_Copy then
1732 if Is_Record_Type (E) then
1733 Set_C_Pass_By_Copy (Base_Type (E));
1734 elsif Is_Incomplete_Or_Private_Type (E)
1735 and then Is_Record_Type (Underlying_Type (E))
1737 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
1740 ("C_Pass_By_Copy convention allowed only for record type",
1745 -- If the entity is a derived boolean type, check for the
1746 -- special case of convention C, C++, or Fortran, where we
1747 -- consider any nonzero value to represent true.
1749 if Is_Discrete_Type (E)
1750 and then Root_Type (Etype (E)) = Standard_Boolean
1756 C = Convention_Fortran)
1758 Set_Nonzero_Is_True (Base_Type (E));
1760 end Set_Convention_From_Pragma;
1762 -- Start of processing for Process_Convention
1765 Check_At_Least_N_Arguments (2);
1766 Check_Arg_Is_Identifier (Arg1);
1767 Check_Optional_Identifier (Arg1, Name_Convention);
1768 Cname := Chars (Expression (Arg1));
1770 -- C_Pass_By_Copy is treated as a synonym for convention C
1771 -- (this is tested again below to set the critical flag)
1773 if Cname = Name_C_Pass_By_Copy then
1776 -- Otherwise we must have something in the standard convention list
1778 elsif Is_Convention_Name (Cname) then
1779 C := Get_Convention_Id (Chars (Expression (Arg1)));
1781 -- In DEC VMS, it seems that there is an undocumented feature
1782 -- that any unrecognized convention is treated as the default,
1783 -- which for us is convention C. It does not seem so terrible
1784 -- to do this unconditionally, silently in the VMS case, and
1785 -- with a warning in the non-VMS case.
1788 if Warn_On_Export_Import and not OpenVMS_On_Target then
1790 ("?unrecognized convention name, C assumed",
1797 Check_Arg_Is_Local_Name (Arg2);
1798 Check_Optional_Identifier (Arg2, Name_Entity);
1800 Id := Expression (Arg2);
1803 if not Is_Entity_Name (Id) then
1804 Error_Pragma_Arg ("entity name required", Arg2);
1809 -- Go to renamed subprogram if present, since convention applies
1810 -- to the actual renamed entity, not to the renaming entity.
1812 if Is_Subprogram (E)
1813 and then Present (Alias (E))
1814 and then Nkind (Parent (Declaration_Node (E))) =
1815 N_Subprogram_Renaming_Declaration
1820 -- Check that we not applying this to a specless body
1822 if Is_Subprogram (E)
1823 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
1826 ("pragma% requires separate spec and must come before body");
1829 -- Check that we are not applying this to a named constant
1831 if Ekind (E) = E_Named_Integer
1833 Ekind (E) = E_Named_Real
1835 Error_Msg_Name_1 := Chars (N);
1837 ("cannot apply pragma% to named constant!",
1838 Get_Pragma_Arg (Arg2));
1840 ("\supply appropriate type for&!", Arg2);
1843 if Etype (E) = Any_Type
1844 or else Rep_Item_Too_Early (E, N)
1848 E := Underlying_Type (E);
1851 if Rep_Item_Too_Late (E, N) then
1855 if Has_Convention_Pragma (E) then
1857 ("at most one Convention/Export/Import pragma is allowed", Arg2);
1859 elsif Convention (E) = Convention_Protected
1860 or else Ekind (Scope (E)) = E_Protected_Type
1863 ("a protected operation cannot be given a different convention",
1867 -- For Intrinsic, a subprogram is required
1869 if C = Convention_Intrinsic
1870 and then not Is_Subprogram (E)
1871 and then not Is_Generic_Subprogram (E)
1874 ("second argument of pragma% must be a subprogram", Arg2);
1877 -- For Stdcall, a subprogram, variable or subprogram type is required
1879 if C = Convention_Stdcall
1880 and then not Is_Subprogram (E)
1881 and then not Is_Generic_Subprogram (E)
1882 and then Ekind (E) /= E_Variable
1885 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
1888 ("second argument of pragma% must be subprogram (type)",
1892 if not Is_Subprogram (E)
1893 and then not Is_Generic_Subprogram (E)
1895 Set_Convention_From_Pragma (E);
1899 Check_First_Subtype (Arg2);
1900 Set_Convention_From_Pragma (Base_Type (E));
1902 -- For subprograms, we must set the convention on the
1903 -- internally generated directly designated type as well.
1905 if Ekind (E) = E_Access_Subprogram_Type then
1906 Set_Convention_From_Pragma (Directly_Designated_Type (E));
1910 -- For the subprogram case, set proper convention for all homonyms
1911 -- in same scope and the same declarative part, i.e. the same
1912 -- compilation unit.
1915 Comp_Unit := Get_Source_Unit (E);
1916 Set_Convention_From_Pragma (E);
1918 -- Treat a pragma Import as an implicit body, for GPS use.
1920 if Prag_Id = Pragma_Import then
1921 Generate_Reference (E, Id, 'b');
1927 exit when No (E1) or else Scope (E1) /= Current_Scope;
1929 -- Note: below we are missing a check for Rep_Item_Too_Late.
1930 -- That is deliberate, we cannot chain the rep item on more
1931 -- than one Rep_Item chain, to be fixed later ???
1933 if Comes_From_Source (E1)
1934 and then Comp_Unit = Get_Source_Unit (E1)
1935 and then Nkind (Original_Node (Parent (E1))) /=
1936 N_Full_Type_Declaration
1938 Set_Convention_From_Pragma (E1);
1940 if Prag_Id = Pragma_Import then
1941 Generate_Reference (E, Id, 'b');
1946 end Process_Convention;
1948 -----------------------------------------------------
1949 -- Process_Extended_Import_Export_Exception_Pragma --
1950 -----------------------------------------------------
1952 procedure Process_Extended_Import_Export_Exception_Pragma
1953 (Arg_Internal : Node_Id;
1954 Arg_External : Node_Id;
1964 if not OpenVMS_On_Target then
1966 ("?pragma% ignored (applies only to Open'V'M'S)");
1969 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
1970 Def_Id := Entity (Arg_Internal);
1972 if Ekind (Def_Id) /= E_Exception then
1974 ("pragma% must refer to declared exception", Arg_Internal);
1977 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
1979 if Present (Arg_Form) then
1980 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
1983 if Present (Arg_Form)
1984 and then Chars (Arg_Form) = Name_Ada
1988 Set_Is_VMS_Exception (Def_Id);
1989 Set_Exception_Code (Def_Id, No_Uint);
1992 if Present (Arg_Code) then
1993 if not Is_VMS_Exception (Def_Id) then
1995 ("Code option for pragma% not allowed for Ada case",
1999 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2000 Code_Val := Expr_Value (Arg_Code);
2002 if not UI_Is_In_Int_Range (Code_Val) then
2004 ("Code option for pragma% must be in 32-bit range",
2008 Set_Exception_Code (Def_Id, Code_Val);
2011 end Process_Extended_Import_Export_Exception_Pragma;
2013 -------------------------------------------------
2014 -- Process_Extended_Import_Export_Internal_Arg --
2015 -------------------------------------------------
2017 procedure Process_Extended_Import_Export_Internal_Arg
2018 (Arg_Internal : Node_Id := Empty)
2023 if No (Arg_Internal) then
2024 Error_Pragma ("Internal parameter required for pragma%");
2027 if Nkind (Arg_Internal) = N_Identifier then
2030 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2031 and then (Prag_Id = Pragma_Import_Function
2033 Prag_Id = Pragma_Export_Function)
2039 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2042 Check_Arg_Is_Local_Name (Arg_Internal);
2043 end Process_Extended_Import_Export_Internal_Arg;
2045 --------------------------------------------------
2046 -- Process_Extended_Import_Export_Object_Pragma --
2047 --------------------------------------------------
2049 procedure Process_Extended_Import_Export_Object_Pragma
2050 (Arg_Internal : Node_Id;
2051 Arg_External : Node_Id;
2057 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2058 Def_Id := Entity (Arg_Internal);
2060 if Ekind (Def_Id) /= E_Constant
2061 and then Ekind (Def_Id) /= E_Variable
2064 ("pragma% must designate an object", Arg_Internal);
2067 if Is_Psected (Def_Id) then
2069 ("previous Psect_Object applies, pragma % not permitted",
2073 if Rep_Item_Too_Late (Def_Id, N) then
2077 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2079 if Present (Arg_Size)
2080 and then Nkind (Arg_Size) /= N_Identifier
2081 and then Nkind (Arg_Size) /= N_String_Literal
2084 ("pragma% Size argument must be identifier or string literal",
2088 -- Export_Object case
2090 if Prag_Id = Pragma_Export_Object then
2091 if not Is_Library_Level_Entity (Def_Id) then
2093 ("argument for pragma% must be library level entity",
2097 if Ekind (Current_Scope) = E_Generic_Package then
2098 Error_Pragma ("pragma& cannot appear in a generic unit");
2101 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2103 ("exported object must have compile time known size",
2107 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2109 ("?duplicate Export_Object pragma", N);
2111 Set_Exported (Def_Id, Arg_Internal);
2114 -- Import_Object case
2117 if Is_Concurrent_Type (Etype (Def_Id)) then
2119 ("cannot use pragma% for task/protected object",
2123 if Ekind (Def_Id) = E_Constant then
2125 ("cannot import a constant", Arg_Internal);
2128 if Warn_On_Export_Import
2129 and then Has_Discriminants (Etype (Def_Id))
2132 ("imported value must be initialized?", Arg_Internal);
2135 if Warn_On_Export_Import
2136 and then Is_Access_Type (Etype (Def_Id))
2139 ("cannot import object of an access type?", Arg_Internal);
2142 if Warn_On_Export_Import
2143 and then Is_Imported (Def_Id)
2146 ("?duplicate Import_Object pragma", N);
2148 -- Check for explicit initialization present. Note that an
2149 -- initialization that generated by the code generator, e.g.
2150 -- for an access type, does not count here.
2152 elsif Present (Expression (Parent (Def_Id)))
2155 (Original_Node (Expression (Parent (Def_Id))))
2157 Error_Msg_Sloc := Sloc (Def_Id);
2159 ("no initialization allowed for declaration of& #",
2160 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2163 Set_Imported (Def_Id);
2164 Note_Possible_Modification (Arg_Internal);
2167 end Process_Extended_Import_Export_Object_Pragma;
2169 ------------------------------------------------------
2170 -- Process_Extended_Import_Export_Subprogram_Pragma --
2171 ------------------------------------------------------
2173 procedure Process_Extended_Import_Export_Subprogram_Pragma
2174 (Arg_Internal : Node_Id;
2175 Arg_External : Node_Id;
2176 Arg_Parameter_Types : Node_Id;
2177 Arg_Result_Type : Node_Id := Empty;
2178 Arg_Mechanism : Node_Id;
2179 Arg_Result_Mechanism : Node_Id := Empty;
2180 Arg_First_Optional_Parameter : Node_Id := Empty)
2186 Ambiguous : Boolean;
2190 function Same_Base_Type
2192 Formal : Entity_Id) return Boolean;
2193 -- Determines if Ptype references the type of Formal. Note that
2194 -- only the base types need to match according to the spec. Ptype
2195 -- here is the argument from the pragma, which is either a type
2196 -- name, or an access attribute.
2198 --------------------
2199 -- Same_Base_Type --
2200 --------------------
2202 function Same_Base_Type
2204 Formal : Entity_Id) return Boolean
2206 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2210 -- Case where pragma argument is typ'Access
2212 if Nkind (Ptype) = N_Attribute_Reference
2213 and then Attribute_Name (Ptype) = Name_Access
2215 Pref := Prefix (Ptype);
2218 if not Is_Entity_Name (Pref)
2219 or else Entity (Pref) = Any_Type
2224 -- We have a match if the corresponding argument is of an
2225 -- anonymous access type, and its designicated type matches
2226 -- the type of the prefix of the access attribute
2228 return Ekind (Ftyp) = E_Anonymous_Access_Type
2229 and then Base_Type (Entity (Pref)) =
2230 Base_Type (Etype (Designated_Type (Ftyp)));
2232 -- Case where pragma argument is a type name
2237 if not Is_Entity_Name (Ptype)
2238 or else Entity (Ptype) = Any_Type
2243 -- We have a match if the corresponding argument is of
2244 -- the type given in the pragma (comparing base types)
2246 return Base_Type (Entity (Ptype)) = Ftyp;
2250 -- Start of processing for
2251 -- Process_Extended_Import_Export_Subprogram_Pragma
2254 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2255 Hom_Id := Entity (Arg_Internal);
2259 -- Loop through homonyms (overloadings) of Hom_Id
2261 while Present (Hom_Id) loop
2262 Def_Id := Get_Base_Subprogram (Hom_Id);
2264 -- We need a subprogram in the current scope
2266 if not Is_Subprogram (Def_Id)
2267 or else Scope (Def_Id) /= Current_Scope
2274 -- Pragma cannot apply to subprogram body
2276 if Is_Subprogram (Def_Id)
2279 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2282 ("pragma% requires separate spec"
2283 & " and must come before body");
2286 -- Test result type if given, note that the result type
2287 -- parameter can only be present for the function cases.
2289 if Present (Arg_Result_Type)
2290 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2294 elsif Etype (Def_Id) /= Standard_Void_Type
2296 (Chars (N) = Name_Export_Procedure
2297 or else Chars (N) = Name_Import_Procedure)
2301 -- Test parameter types if given. Note that this parameter
2302 -- has not been analyzed (and must not be, since it is
2303 -- semantic nonsense), so we get it as the parser left it.
2305 elsif Present (Arg_Parameter_Types) then
2306 Check_Matching_Types : declare
2311 Formal := First_Formal (Def_Id);
2313 if Nkind (Arg_Parameter_Types) = N_Null then
2314 if Present (Formal) then
2318 -- A list of one type, e.g. (List) is parsed as
2319 -- a parenthesized expression.
2321 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2322 and then Paren_Count (Arg_Parameter_Types) = 1
2325 or else Present (Next_Formal (Formal))
2330 Same_Base_Type (Arg_Parameter_Types, Formal);
2333 -- A list of more than one type is parsed as a aggregate
2335 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2336 and then Paren_Count (Arg_Parameter_Types) = 0
2338 Ptype := First (Expressions (Arg_Parameter_Types));
2339 while Present (Ptype) or else Present (Formal) loop
2342 or else not Same_Base_Type (Ptype, Formal)
2347 Next_Formal (Formal);
2352 -- Anything else is of the wrong form
2356 ("wrong form for Parameter_Types parameter",
2357 Arg_Parameter_Types);
2359 end Check_Matching_Types;
2362 -- Match is now False if the entry we found did not match
2363 -- either a supplied Parameter_Types or Result_Types argument
2369 -- Ambiguous case, the flag Ambiguous shows if we already
2370 -- detected this and output the initial messages.
2373 if not Ambiguous then
2375 Error_Msg_Name_1 := Chars (N);
2377 ("pragma% does not uniquely identify subprogram!",
2379 Error_Msg_Sloc := Sloc (Ent);
2380 Error_Msg_N ("matching subprogram #!", N);
2384 Error_Msg_Sloc := Sloc (Def_Id);
2385 Error_Msg_N ("matching subprogram #!", N);
2390 Hom_Id := Homonym (Hom_Id);
2393 -- See if we found an entry
2396 if not Ambiguous then
2397 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
2399 ("pragma% cannot be given for generic subprogram");
2403 ("pragma% does not identify local subprogram");
2410 -- Import pragmas must be be for imported entities
2412 if Prag_Id = Pragma_Import_Function
2414 Prag_Id = Pragma_Import_Procedure
2416 Prag_Id = Pragma_Import_Valued_Procedure
2418 if not Is_Imported (Ent) then
2420 ("pragma Import or Interface must precede pragma%");
2423 -- Here we have the Export case which can set the entity as exported
2425 -- But does not do so if the specified external name is null,
2426 -- since that is taken as a signal in DEC Ada 83 (with which
2427 -- we want to be compatible) to request no external name.
2429 elsif Nkind (Arg_External) = N_String_Literal
2430 and then String_Length (Strval (Arg_External)) = 0
2434 -- In all other cases, set entit as exported
2437 Set_Exported (Ent, Arg_Internal);
2440 -- Special processing for Valued_Procedure cases
2442 if Prag_Id = Pragma_Import_Valued_Procedure
2444 Prag_Id = Pragma_Export_Valued_Procedure
2446 Formal := First_Formal (Ent);
2450 ("at least one parameter required for pragma%");
2452 elsif Ekind (Formal) /= E_Out_Parameter then
2454 ("first parameter must have mode out for pragma%");
2457 Set_Is_Valued_Procedure (Ent);
2461 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
2463 -- Process Result_Mechanism argument if present. We have already
2464 -- checked that this is only allowed for the function case.
2466 if Present (Arg_Result_Mechanism) then
2467 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
2470 -- Process Mechanism parameter if present. Note that this parameter
2471 -- is not analyzed, and must not be analyzed since it is semantic
2472 -- nonsense, so we get it in exactly as the parser left it.
2474 if Present (Arg_Mechanism) then
2482 -- A single mechanism association without a formal parameter
2483 -- name is parsed as a parenthesized expression. All other
2484 -- cases are parsed as aggregates, so we rewrite the single
2485 -- parameter case as an aggregate for consistency.
2487 if Nkind (Arg_Mechanism) /= N_Aggregate
2488 and then Paren_Count (Arg_Mechanism) = 1
2490 Rewrite (Arg_Mechanism,
2491 Make_Aggregate (Sloc (Arg_Mechanism),
2492 Expressions => New_List (
2493 Relocate_Node (Arg_Mechanism))));
2496 -- Case of only mechanism name given, applies to all formals
2498 if Nkind (Arg_Mechanism) /= N_Aggregate then
2499 Formal := First_Formal (Ent);
2500 while Present (Formal) loop
2501 Set_Mechanism_Value (Formal, Arg_Mechanism);
2502 Next_Formal (Formal);
2505 -- Case of list of mechanism associations given
2508 if Null_Record_Present (Arg_Mechanism) then
2510 ("inappropriate form for Mechanism parameter",
2514 -- Deal with positional ones first
2516 Formal := First_Formal (Ent);
2517 if Present (Expressions (Arg_Mechanism)) then
2518 Mname := First (Expressions (Arg_Mechanism));
2520 while Present (Mname) loop
2523 ("too many mechanism associations", Mname);
2526 Set_Mechanism_Value (Formal, Mname);
2527 Next_Formal (Formal);
2532 -- Deal with named entries
2534 if Present (Component_Associations (Arg_Mechanism)) then
2535 Massoc := First (Component_Associations (Arg_Mechanism));
2537 while Present (Massoc) loop
2538 Choice := First (Choices (Massoc));
2540 if Nkind (Choice) /= N_Identifier
2541 or else Present (Next (Choice))
2544 ("incorrect form for mechanism association",
2548 Formal := First_Formal (Ent);
2552 ("parameter name & not present", Choice);
2555 if Chars (Choice) = Chars (Formal) then
2557 (Formal, Expression (Massoc));
2561 Next_Formal (Formal);
2571 -- Process First_Optional_Parameter argument if present. We have
2572 -- already checked that this is only allowed for the Import case.
2574 if Present (Arg_First_Optional_Parameter) then
2575 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
2577 ("first optional parameter must be formal parameter name",
2578 Arg_First_Optional_Parameter);
2581 Formal := First_Formal (Ent);
2585 ("specified formal parameter& not found",
2586 Arg_First_Optional_Parameter);
2589 exit when Chars (Formal) =
2590 Chars (Arg_First_Optional_Parameter);
2592 Next_Formal (Formal);
2595 Set_First_Optional_Parameter (Ent, Formal);
2597 -- Check specified and all remaining formals have right form
2599 while Present (Formal) loop
2600 if Ekind (Formal) /= E_In_Parameter then
2602 ("optional formal& is not of mode in!",
2603 Arg_First_Optional_Parameter, Formal);
2606 Dval := Default_Value (Formal);
2608 if not Present (Dval) then
2610 ("optional formal& does not have default value!",
2611 Arg_First_Optional_Parameter, Formal);
2613 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
2618 ("default value for optional formal& is non-static!",
2619 Arg_First_Optional_Parameter, Formal);
2623 Set_Is_Optional_Parameter (Formal);
2624 Next_Formal (Formal);
2627 end Process_Extended_Import_Export_Subprogram_Pragma;
2629 --------------------------
2630 -- Process_Generic_List --
2631 --------------------------
2633 procedure Process_Generic_List is
2639 Check_No_Identifiers;
2640 Check_At_Least_N_Arguments (1);
2643 while Present (Arg) loop
2644 Exp := Expression (Arg);
2647 if not Is_Entity_Name (Exp)
2649 (not Is_Generic_Instance (Entity (Exp))
2651 not Is_Generic_Unit (Entity (Exp)))
2654 ("pragma% argument must be name of generic unit/instance",
2660 end Process_Generic_List;
2662 ---------------------------------
2663 -- Process_Import_Or_Interface --
2664 ---------------------------------
2666 procedure Process_Import_Or_Interface is
2672 Process_Convention (C, Def_Id);
2673 Kill_Size_Check_Code (Def_Id);
2674 Note_Possible_Modification (Expression (Arg2));
2676 if Ekind (Def_Id) = E_Variable
2678 Ekind (Def_Id) = E_Constant
2680 -- User initialization is not allowed for imported object, but
2681 -- the object declaration may contain a default initialization,
2682 -- that will be discarded. Note that an explicit initialization
2683 -- only counts if it comes from source, otherwise it is simply
2684 -- the code generator making an implicit initialization explicit.
2686 if Present (Expression (Parent (Def_Id)))
2687 and then Comes_From_Source (Expression (Parent (Def_Id)))
2689 Error_Msg_Sloc := Sloc (Def_Id);
2691 ("no initialization allowed for declaration of& #",
2692 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2696 Set_Imported (Def_Id);
2697 Set_Is_Public (Def_Id);
2698 Process_Interface_Name (Def_Id, Arg3, Arg4);
2700 -- It is not possible to import a constant of an unconstrained
2701 -- array type (e.g. string) because there is no simple way to
2702 -- write a meaningful subtype for it.
2704 if Is_Array_Type (Etype (Def_Id))
2705 and then not Is_Constrained (Etype (Def_Id))
2708 ("imported constant& must have a constrained subtype",
2713 elsif Is_Subprogram (Def_Id)
2714 or else Is_Generic_Subprogram (Def_Id)
2716 -- If the name is overloaded, pragma applies to all of the
2717 -- denoted entities in the same declarative part.
2721 while Present (Hom_Id) loop
2722 Def_Id := Get_Base_Subprogram (Hom_Id);
2724 -- Ignore inherited subprograms because the pragma will
2725 -- apply to the parent operation, which is the one called.
2727 if Is_Overloadable (Def_Id)
2728 and then Present (Alias (Def_Id))
2732 -- If it is not a subprogram, it must be in an outer
2733 -- scope and pragma does not apply.
2735 elsif not Is_Subprogram (Def_Id)
2736 and then not Is_Generic_Subprogram (Def_Id)
2740 -- Verify that the homonym is in the same declarative
2741 -- part (not just the same scope).
2743 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
2744 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
2749 Set_Imported (Def_Id);
2751 -- If Import intrinsic, set intrinsic flag
2752 -- and verify that it is known as such.
2754 if C = Convention_Intrinsic then
2755 Set_Is_Intrinsic_Subprogram (Def_Id);
2756 Check_Intrinsic_Subprogram
2757 (Def_Id, Expression (Arg2));
2760 -- All interfaced procedures need an external
2761 -- symbol created for them since they are
2762 -- always referenced from another object file.
2764 Set_Is_Public (Def_Id);
2766 -- Verify that the subprogram does not have a completion
2767 -- through a renaming declaration. For other completions
2768 -- the pragma appears as a too late representation.
2771 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
2775 and then Nkind (Decl) = N_Subprogram_Declaration
2776 and then Present (Corresponding_Body (Decl))
2779 (Unit_Declaration_Node
2780 (Corresponding_Body (Decl))) =
2781 N_Subprogram_Renaming_Declaration
2783 Error_Msg_Sloc := Sloc (Def_Id);
2784 Error_Msg_NE ("cannot import&#," &
2785 " already completed by a renaming",
2790 Set_Has_Completion (Def_Id);
2791 Process_Interface_Name (Def_Id, Arg3, Arg4);
2794 if Is_Compilation_Unit (Hom_Id) then
2796 -- Its possible homonyms are not affected by the pragma.
2797 -- Such homonyms might be present in the context of other
2798 -- units being compiled.
2803 Hom_Id := Homonym (Hom_Id);
2807 -- When the convention is Java, we also allow Import to be given
2808 -- for packages, exceptions, and record components.
2810 elsif C = Convention_Java
2812 (Ekind (Def_Id) = E_Package
2813 or else Ekind (Def_Id) = E_Exception
2814 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
2816 Set_Imported (Def_Id);
2817 Set_Is_Public (Def_Id);
2818 Process_Interface_Name (Def_Id, Arg3, Arg4);
2822 ("second argument of pragma% must be object or subprogram",
2826 -- If this pragma applies to a compilation unit, then the unit,
2827 -- which is a subprogram, does not require (or allow) a body.
2828 -- We also do not need to elaborate imported procedures.
2830 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
2832 Cunit : constant Node_Id := Parent (Parent (N));
2834 Set_Body_Required (Cunit, False);
2837 end Process_Import_Or_Interface;
2839 --------------------
2840 -- Process_Inline --
2841 --------------------
2843 procedure Process_Inline (Active : Boolean) is
2849 Effective : Boolean := False;
2851 procedure Make_Inline (Subp : Entity_Id);
2852 -- Subp is the defining unit name of the subprogram
2853 -- declaration. Set the flag, as well as the flag in the
2854 -- corresponding body, if there is one present.
2856 procedure Set_Inline_Flags (Subp : Entity_Id);
2857 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp
2859 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean;
2860 -- Do not set the inline flag if body is available and contains
2861 -- exception handlers, to prevent undefined symbols at link time.
2863 ----------------------------
2864 -- Back_End_Cannot_Inline --
2865 ----------------------------
2867 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean is
2868 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
2871 if Nkind (Decl) = N_Subprogram_Body then
2874 (Exception_Handlers (Handled_Statement_Sequence (Decl)));
2876 elsif Nkind (Decl) = N_Subprogram_Declaration
2877 and then Present (Corresponding_Body (Decl))
2879 -- If the subprogram is a renaming as body, the body is
2880 -- just a call to the renamed subprogram, and inlining is
2881 -- trivially possible.
2883 if Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
2884 N_Subprogram_Renaming_Declaration
2890 Present (Exception_Handlers
2891 (Handled_Statement_Sequence
2892 (Unit_Declaration_Node (Corresponding_Body (Decl)))));
2895 -- If body is not available, assume the best, the check is
2896 -- performed again when compiling enclosing package bodies.
2900 end Back_End_Cannot_Inline;
2906 procedure Make_Inline (Subp : Entity_Id) is
2907 Kind : constant Entity_Kind := Ekind (Subp);
2908 Inner_Subp : Entity_Id := Subp;
2911 if Etype (Subp) = Any_Type then
2914 elsif Back_End_Cannot_Inline (Subp) then
2915 Applies := True; -- Do not treat as an error.
2918 -- Here we have a candidate for inlining, but we must exclude
2919 -- derived operations. Otherwise we will end up trying to
2920 -- inline a phantom declaration, and the result would be to
2921 -- drag in a body which has no direct inlining associated with
2922 -- it. That would not only be inefficient but would also result
2923 -- in the backend doing cross-unit inlining in cases where it
2924 -- was definitely inappropriate to do so.
2926 -- However, a simple Comes_From_Source test is insufficient,
2927 -- since we do want to allow inlining of generic instances,
2928 -- which also do not come from source. Predefined operators do
2929 -- not come from source but are not inlineable either.
2931 elsif not Comes_From_Source (Subp)
2932 and then not Is_Generic_Instance (Subp)
2933 and then Scope (Subp) /= Standard_Standard
2938 -- The referenced entity must either be the enclosing entity,
2939 -- or an entity declared within the current open scope.
2941 elsif Present (Scope (Subp))
2942 and then Scope (Subp) /= Current_Scope
2943 and then Subp /= Current_Scope
2946 ("argument of% must be entity in current scope", Assoc);
2950 -- Processing for procedure, operator or function.
2951 -- If subprogram is aliased (as for an instance) indicate
2952 -- that the renamed entity (if declared in the same unit)
2955 if Is_Subprogram (Subp) then
2956 while Present (Alias (Inner_Subp)) loop
2957 Inner_Subp := Alias (Inner_Subp);
2960 if In_Same_Source_Unit (Subp, Inner_Subp) then
2961 Set_Inline_Flags (Inner_Subp);
2963 Decl := Parent (Parent (Inner_Subp));
2965 if Nkind (Decl) = N_Subprogram_Declaration
2966 and then Present (Corresponding_Body (Decl))
2968 Set_Inline_Flags (Corresponding_Body (Decl));
2974 -- For a generic subprogram set flag as well, for use at
2975 -- the point of instantiation, to determine whether the
2976 -- body should be generated.
2978 elsif Is_Generic_Subprogram (Subp) then
2979 Set_Inline_Flags (Subp);
2982 -- Literals are by definition inlined
2984 elsif Kind = E_Enumeration_Literal then
2987 -- Anything else is an error
2991 ("expect subprogram name for pragma%", Assoc);
2995 ----------------------
2996 -- Set_Inline_Flags --
2997 ----------------------
2999 procedure Set_Inline_Flags (Subp : Entity_Id) is
3002 Set_Is_Inlined (Subp, True);
3005 if not Has_Pragma_Inline (Subp) then
3006 Set_Has_Pragma_Inline (Subp);
3007 Set_Next_Rep_Item (N, First_Rep_Item (Subp));
3008 Set_First_Rep_Item (Subp, N);
3011 end Set_Inline_Flags;
3013 -- Start of processing for Process_Inline
3016 Check_No_Identifiers;
3017 Check_At_Least_N_Arguments (1);
3020 Inline_Processing_Required := True;
3024 while Present (Assoc) loop
3025 Subp_Id := Expression (Assoc);
3029 if Is_Entity_Name (Subp_Id) then
3030 Subp := Entity (Subp_Id);
3032 if Subp = Any_Id then
3038 while Present (Homonym (Subp))
3039 and then Scope (Homonym (Subp)) = Current_Scope
3041 Make_Inline (Homonym (Subp));
3042 Subp := Homonym (Subp);
3049 ("inappropriate argument for pragma%", Assoc);
3052 and then Warn_On_Redundant_Constructs
3054 Error_Msg_NE ("pragma inline on& is redundant?",
3055 N, Entity (Subp_Id));
3062 ----------------------------
3063 -- Process_Interface_Name --
3064 ----------------------------
3066 procedure Process_Interface_Name
3067 (Subprogram_Def : Entity_Id;
3073 String_Val : String_Id;
3075 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3076 -- SN is a string literal node for an interface name. This routine
3077 -- performs some minimal checks that the name is reasonable. In
3078 -- particular that no spaces or other obviously incorrect characters
3079 -- appear. This is only a warning, since any characters are allowed.
3081 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3082 S : constant String_Id := Strval (Expr_Value_S (SN));
3083 SL : constant Nat := String_Length (S);
3088 Error_Msg_N ("interface name cannot be null string", SN);
3091 for J in 1 .. SL loop
3092 C := Get_String_Char (S, J);
3094 if Warn_On_Export_Import
3095 and then (not In_Character_Range (C)
3096 or else Get_Character (C) = ' '
3097 or else Get_Character (C) = ',')
3100 ("?interface name contains illegal character", SN);
3103 end Check_Form_Of_Interface_Name;
3105 -- Start of processing for Process_Interface_Name
3108 if No (Link_Arg) then
3109 if No (Ext_Arg) then
3112 elsif Chars (Ext_Arg) = Name_Link_Name then
3114 Link_Nam := Expression (Ext_Arg);
3117 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3118 Ext_Nam := Expression (Ext_Arg);
3123 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3124 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3125 Ext_Nam := Expression (Ext_Arg);
3126 Link_Nam := Expression (Link_Arg);
3129 -- Check expressions for external name and link name are static
3131 if Present (Ext_Nam) then
3132 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3133 Check_Form_Of_Interface_Name (Ext_Nam);
3135 -- Verify that the external name is not the name of a local
3136 -- entity, which would hide the imported one and lead to
3137 -- run-time surprises. The problem can only arise for entities
3138 -- declared in a package body (otherwise the external name is
3139 -- fully qualified and won't conflict).
3147 if Prag_Id = Pragma_Import then
3148 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3150 E := Entity_Id (Get_Name_Table_Info (Nam));
3152 if Nam /= Chars (Subprogram_Def)
3153 and then Present (E)
3154 and then not Is_Overloadable (E)
3155 and then Is_Immediately_Visible (E)
3156 and then not Is_Imported (E)
3157 and then Ekind (Scope (E)) = E_Package
3161 while Present (Par) loop
3162 if Nkind (Par) = N_Package_Body then
3163 Error_Msg_Sloc := Sloc (E);
3165 ("imported entity is hidden by & declared#",
3170 Par := Parent (Par);
3177 if Present (Link_Nam) then
3178 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3179 Check_Form_Of_Interface_Name (Link_Nam);
3182 -- If there is no link name, just set the external name
3184 if No (Link_Nam) then
3185 Set_Encoded_Interface_Name
3186 (Get_Base_Subprogram (Subprogram_Def),
3187 Adjust_External_Name_Case (Expr_Value_S (Ext_Nam)));
3189 -- For the Link_Name case, the given literal is preceded by an
3190 -- asterisk, which indicates to GCC that the given name should
3191 -- be taken literally, and in particular that no prepending of
3192 -- underlines should occur, even in systems where this is the
3197 Store_String_Char (Get_Char_Code ('*'));
3198 String_Val := Strval (Expr_Value_S (Link_Nam));
3200 for J in 1 .. String_Length (String_Val) loop
3201 Store_String_Char (Get_String_Char (String_Val, J));
3205 Make_String_Literal (Sloc (Link_Nam), End_String);
3207 Set_Encoded_Interface_Name
3208 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3210 end Process_Interface_Name;
3212 -----------------------------------------
3213 -- Process_Interrupt_Or_Attach_Handler --
3214 -----------------------------------------
3216 procedure Process_Interrupt_Or_Attach_Handler is
3217 Arg1_X : constant Node_Id := Expression (Arg1);
3218 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3219 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3222 Set_Is_Interrupt_Handler (Handler_Proc);
3224 -- If the pragma is not associated with a handler procedure
3225 -- within a protected type, then it must be for a nonprotected
3226 -- procedure for the AAMP target, in which case we don't
3227 -- associate a representation item with the procedure's scope.
3229 if Ekind (Proc_Scope) = E_Protected_Type then
3230 if Prag_Id = Pragma_Interrupt_Handler
3232 Prag_Id = Pragma_Attach_Handler
3234 Record_Rep_Item (Proc_Scope, N);
3237 end Process_Interrupt_Or_Attach_Handler;
3239 --------------------------------------------------
3240 -- Process_Restrictions_Or_Restriction_Warnings --
3241 --------------------------------------------------
3243 procedure Process_Restrictions_Or_Restriction_Warnings is
3245 R_Id : Restriction_Id;
3250 procedure Set_Warning (R : All_Restrictions);
3251 -- If this is a Restriction_Warnings pragma, set warning flag
3257 procedure Set_Warning (R : All_Restrictions) is
3259 if Prag_Id = Pragma_Restriction_Warnings then
3260 Restriction_Warnings (R) := True;
3264 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
3267 Check_Ada_83_Warning;
3268 Check_At_Least_N_Arguments (1);
3269 Check_Valid_Configuration_Pragma;
3272 while Present (Arg) loop
3274 Expr := Expression (Arg);
3276 -- Case of no restriction identifier present
3278 if Id = No_Name then
3279 if Nkind (Expr) /= N_Identifier then
3281 ("invalid form for restriction", Arg);
3286 (Process_Restriction_Synonyms (Chars (Expr)));
3288 if R_Id not in All_Boolean_Restrictions then
3290 ("invalid restriction identifier", Arg);
3293 if Implementation_Restriction (R_Id) then
3295 (No_Implementation_Restrictions, Arg);
3298 Set_Restriction (R_Id, N);
3301 -- A very special case that must be processed here:
3302 -- pragma Restrictions (No_Exceptions) turns off
3303 -- all run-time checking. This is a bit dubious in
3304 -- terms of the formal language definition, but it
3305 -- is what is intended by RM H.4(12).
3307 if R_Id = No_Exceptions then
3308 Scope_Suppress := (others => True);
3311 -- Case of restriction identifier present
3314 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Id));
3315 Analyze_And_Resolve (Expr, Any_Integer);
3317 if R_Id not in All_Parameter_Restrictions then
3319 ("invalid restriction parameter identifier", Arg);
3321 elsif not Is_OK_Static_Expression (Expr) then
3322 Flag_Non_Static_Expr
3323 ("value must be static expression!", Expr);
3326 elsif not Is_Integer_Type (Etype (Expr))
3327 or else Expr_Value (Expr) < 0
3330 ("value must be non-negative integer", Arg);
3332 -- Restriction pragma is active
3335 Val := Expr_Value (Expr);
3337 if not UI_Is_In_Int_Range (Val) then
3339 ("pragma ignored, value too large?", Arg);
3341 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
3349 end Process_Restrictions_Or_Restriction_Warnings;
3351 ---------------------------------
3352 -- Process_Suppress_Unsuppress --
3353 ---------------------------------
3355 -- Note: this procedure makes entries in the check suppress data
3356 -- structures managed by Sem. See spec of package Sem for full
3357 -- details on how we handle recording of check suppression.
3359 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
3364 In_Package_Spec : constant Boolean :=
3365 (Ekind (Current_Scope) = E_Package
3367 Ekind (Current_Scope) = E_Generic_Package)
3368 and then not In_Package_Body (Current_Scope);
3370 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
3371 -- Used to suppress a single check on the given entity
3373 --------------------------------
3374 -- Suppress_Unsuppress_Echeck --
3375 --------------------------------
3377 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
3378 ESR : constant Entity_Check_Suppress_Record :=
3381 Suppress => Suppress_Case);
3384 Set_Checks_May_Be_Suppressed (E);
3386 if In_Package_Spec then
3387 Global_Entity_Suppress.Append (ESR);
3389 Local_Entity_Suppress.Append (ESR);
3392 -- If this is a first subtype, and the base type is distinct,
3393 -- then also set the suppress flags on the base type.
3395 if Is_First_Subtype (E)
3396 and then Etype (E) /= E
3398 Suppress_Unsuppress_Echeck (Etype (E), C);
3400 end Suppress_Unsuppress_Echeck;
3402 -- Start of processing for Process_Suppress_Unsuppress
3405 -- Suppress/Unsuppress can appear as a configuration pragma,
3406 -- or in a declarative part or a package spec (RM 11.5(5))
3408 if not Is_Configuration_Pragma then
3409 Check_Is_In_Decl_Part_Or_Package_Spec;
3412 Check_At_Least_N_Arguments (1);
3413 Check_At_Most_N_Arguments (2);
3414 Check_No_Identifier (Arg1);
3415 Check_Arg_Is_Identifier (Arg1);
3417 if not Is_Check_Name (Chars (Expression (Arg1))) then
3419 ("argument of pragma% is not valid check name", Arg1);
3421 C := Get_Check_Id (Chars (Expression (Arg1)));
3424 if Arg_Count = 1 then
3426 -- Make an entry in the local scope suppress table. This is the
3427 -- table that directly shows the current value of the scope
3428 -- suppress check for any check id value.
3430 if C = All_Checks then
3431 for J in Scope_Suppress'Range loop
3432 Scope_Suppress (J) := Suppress_Case;
3435 Scope_Suppress (C) := Suppress_Case;
3438 -- Also make an entry in the Local_Entity_Suppress table. See
3439 -- extended description in the package spec of Sem for details.
3441 Local_Entity_Suppress.Append
3444 Suppress => Suppress_Case));
3446 -- Case of two arguments present, where the check is
3447 -- suppressed for a specified entity (given as the second
3448 -- argument of the pragma)
3451 Check_Optional_Identifier (Arg2, Name_On);
3452 E_Id := Expression (Arg2);
3455 if not Is_Entity_Name (E_Id) then
3457 ("second argument of pragma% must be entity name", Arg2);
3466 -- Enforce RM 11.5(7) which requires that for a pragma that
3467 -- appears within a package spec, the named entity must be
3468 -- within the package spec. We allow the package name itself
3469 -- to be mentioned since that makes sense, although it is not
3470 -- strictly allowed by 11.5(7).
3473 and then E /= Current_Scope
3474 and then Scope (E) /= Current_Scope
3477 ("entity in pragma% is not in package spec ('R'M 11.5(7))",
3481 -- Loop through homonyms. As noted below, in the case of a package
3482 -- spec, only homonyms within the package spec are considered.
3485 Suppress_Unsuppress_Echeck (E, C);
3487 if Is_Generic_Instance (E)
3488 and then Is_Subprogram (E)
3489 and then Present (Alias (E))
3491 Suppress_Unsuppress_Echeck (Alias (E), C);
3494 -- Move to next homonym
3499 -- If we are within a package specification, the
3500 -- pragma only applies to homonyms in the same scope.
3502 exit when In_Package_Spec
3503 and then Scope (E) /= Current_Scope;
3506 end Process_Suppress_Unsuppress;
3512 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
3514 if Is_Imported (E) then
3516 ("cannot export entity& that was previously imported", Arg);
3518 elsif Present (Address_Clause (E)) then
3520 ("cannot export entity& that has an address clause", Arg);
3523 Set_Is_Exported (E);
3525 -- Generate a reference for entity explicitly, because the
3526 -- identifier may be overloaded and name resolution will not
3529 Generate_Reference (E, Arg);
3531 -- Deal with exporting non-library level entity
3533 if not Is_Library_Level_Entity (E) then
3535 -- Not allowed at all for subprograms
3537 if Is_Subprogram (E) then
3538 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
3540 -- Otherwise set public and statically allocated
3544 Set_Is_Statically_Allocated (E);
3546 -- Warn if the corresponding W flag is set and the pragma
3547 -- comes from source. The latter may not be true e.g. on
3548 -- VMS where we expand export pragmas for exception codes
3549 -- associated with imported or exported exceptions. We do
3550 -- not want to generate a warning for something that the
3551 -- user did not write.
3553 if Warn_On_Export_Import
3554 and then Comes_From_Source (Arg)
3557 ("?& has been made static as a result of Export", Arg, E);
3559 ("\this usage is non-standard and non-portable", Arg);
3564 if Warn_On_Export_Import and then Is_Type (E) then
3566 ("exporting a type has no effect?", Arg, E);
3569 if Warn_On_Export_Import and Inside_A_Generic then
3571 ("all instances of& will have the same external name?", Arg, E);
3575 ----------------------------------------------
3576 -- Set_Extended_Import_Export_External_Name --
3577 ----------------------------------------------
3579 procedure Set_Extended_Import_Export_External_Name
3580 (Internal_Ent : Entity_Id;
3581 Arg_External : Node_Id)
3583 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
3587 if No (Arg_External) then
3590 elsif Nkind (Arg_External) = N_String_Literal then
3591 if String_Length (Strval (Arg_External)) = 0 then
3594 New_Name := Adjust_External_Name_Case (Arg_External);
3597 elsif Nkind (Arg_External) = N_Identifier then
3598 New_Name := Get_Default_External_Name (Arg_External);
3602 ("incorrect form for External parameter for pragma%",
3606 -- If we already have an external name set (by a prior normal
3607 -- Import or Export pragma), then the external names must match
3609 if Present (Interface_Name (Internal_Ent)) then
3611 S1 : constant String_Id := Strval (Old_Name);
3612 S2 : constant String_Id := Strval (New_Name);
3615 -- Called if names do not match
3617 procedure Mismatch is
3619 Error_Msg_Sloc := Sloc (Old_Name);
3621 ("external name does not match that given #",
3626 if String_Length (S1) /= String_Length (S2) then
3630 for J in 1 .. String_Length (S1) loop
3631 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
3638 -- Otherwise set the given name
3641 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
3644 end Set_Extended_Import_Export_External_Name;
3650 procedure Set_Imported (E : Entity_Id) is
3652 Error_Msg_Sloc := Sloc (E);
3654 if Is_Exported (E) or else Is_Imported (E) then
3655 Error_Msg_NE ("import of& declared# not allowed", N, E);
3657 if Is_Exported (E) then
3658 Error_Msg_N ("\entity was previously exported", N);
3660 Error_Msg_N ("\entity was previously imported", N);
3663 Error_Pragma ("\(pragma% applies to all previous entities)");
3666 Set_Is_Imported (E);
3668 -- If the entity is an object that is not at the library
3669 -- level, then it is statically allocated. We do not worry
3670 -- about objects with address clauses in this context since
3671 -- they are not really imported in the linker sense.
3674 and then not Is_Library_Level_Entity (E)
3675 and then No (Address_Clause (E))
3677 Set_Is_Statically_Allocated (E);
3682 -------------------------
3683 -- Set_Mechanism_Value --
3684 -------------------------
3686 -- Note: the mechanism name has not been analyzed (and cannot indeed
3687 -- be analyzed, since it is semantic nonsense), so we get it in the
3688 -- exact form created by the parser.
3690 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
3694 procedure Bad_Class;
3695 -- Signal bad descriptor class name
3697 procedure Bad_Mechanism;
3698 -- Signal bad mechanism name
3700 procedure Bad_Class is
3702 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
3705 procedure Bad_Mechanism is
3707 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
3710 -- Start of processing for Set_Mechanism_Value
3713 if Mechanism (Ent) /= Default_Mechanism then
3715 ("mechanism for & has already been set", Mech_Name, Ent);
3718 -- MECHANISM_NAME ::= value | reference | descriptor
3720 if Nkind (Mech_Name) = N_Identifier then
3721 if Chars (Mech_Name) = Name_Value then
3722 Set_Mechanism (Ent, By_Copy);
3725 elsif Chars (Mech_Name) = Name_Reference then
3726 Set_Mechanism (Ent, By_Reference);
3729 elsif Chars (Mech_Name) = Name_Descriptor then
3730 Check_VMS (Mech_Name);
3731 Set_Mechanism (Ent, By_Descriptor);
3734 elsif Chars (Mech_Name) = Name_Copy then
3736 ("bad mechanism name, Value assumed", Mech_Name);
3742 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
3743 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3745 -- Note: this form is parsed as an indexed component
3747 elsif Nkind (Mech_Name) = N_Indexed_Component then
3748 Class := First (Expressions (Mech_Name));
3750 if Nkind (Prefix (Mech_Name)) /= N_Identifier
3751 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
3752 or else Present (Next (Class))
3757 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
3758 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3760 -- Note: this form is parsed as a function call
3762 elsif Nkind (Mech_Name) = N_Function_Call then
3764 Param := First (Parameter_Associations (Mech_Name));
3766 if Nkind (Name (Mech_Name)) /= N_Identifier
3767 or else Chars (Name (Mech_Name)) /= Name_Descriptor
3768 or else Present (Next (Param))
3769 or else No (Selector_Name (Param))
3770 or else Chars (Selector_Name (Param)) /= Name_Class
3774 Class := Explicit_Actual_Parameter (Param);
3781 -- Fall through here with Class set to descriptor class name
3783 Check_VMS (Mech_Name);
3785 if Nkind (Class) /= N_Identifier then
3788 elsif Chars (Class) = Name_UBS then
3789 Set_Mechanism (Ent, By_Descriptor_UBS);
3791 elsif Chars (Class) = Name_UBSB then
3792 Set_Mechanism (Ent, By_Descriptor_UBSB);
3794 elsif Chars (Class) = Name_UBA then
3795 Set_Mechanism (Ent, By_Descriptor_UBA);
3797 elsif Chars (Class) = Name_S then
3798 Set_Mechanism (Ent, By_Descriptor_S);
3800 elsif Chars (Class) = Name_SB then
3801 Set_Mechanism (Ent, By_Descriptor_SB);
3803 elsif Chars (Class) = Name_A then
3804 Set_Mechanism (Ent, By_Descriptor_A);
3806 elsif Chars (Class) = Name_NCA then
3807 Set_Mechanism (Ent, By_Descriptor_NCA);
3813 end Set_Mechanism_Value;
3815 -- Start of processing for Analyze_Pragma
3818 if not Is_Pragma_Name (Chars (N)) then
3819 if Warn_On_Unrecognized_Pragma then
3820 Error_Pragma ("unrecognized pragma%!?");
3825 Prag_Id := Get_Pragma_Id (Chars (N));
3835 if Present (Pragma_Argument_Associations (N)) then
3836 Arg1 := First (Pragma_Argument_Associations (N));
3838 if Present (Arg1) then
3839 Arg2 := Next (Arg1);
3841 if Present (Arg2) then
3842 Arg3 := Next (Arg2);
3844 if Present (Arg3) then
3845 Arg4 := Next (Arg3);
3851 -- Count number of arguments
3858 while Present (Arg_Node) loop
3859 Arg_Count := Arg_Count + 1;
3864 -- An enumeration type defines the pragmas that are supported by the
3865 -- implementation. Get_Pragma_Id (in package Prag) transorms a name
3866 -- into the corresponding enumeration value for the following case.
3874 -- pragma Abort_Defer;
3876 when Pragma_Abort_Defer =>
3878 Check_Arg_Count (0);
3880 -- The only required semantic processing is to check the
3881 -- placement. This pragma must appear at the start of the
3882 -- statement sequence of a handled sequence of statements.
3884 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
3885 or else N /= First (Statements (Parent (N)))
3896 -- Note: this pragma also has some specific processing in Par.Prag
3897 -- because we want to set the Ada 83 mode switch during parsing.
3899 when Pragma_Ada_83 =>
3903 Check_Arg_Count (0);
3911 -- Note: this pragma also has some specific processing in Par.Prag
3912 -- because we want to set the Ada 83 mode switch during parsing.
3914 when Pragma_Ada_95 =>
3918 Check_Arg_Count (0);
3920 ----------------------
3921 -- All_Calls_Remote --
3922 ----------------------
3924 -- pragma All_Calls_Remote [(library_package_NAME)];
3926 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
3927 Lib_Entity : Entity_Id;
3930 Check_Ada_83_Warning;
3931 Check_Valid_Library_Unit_Pragma;
3933 if Nkind (N) = N_Null_Statement then
3937 Lib_Entity := Find_Lib_Unit_Name;
3939 -- This pragma should only apply to a RCI unit (RM E.2.3(23)).
3941 if Present (Lib_Entity)
3942 and then not Debug_Flag_U
3944 if not Is_Remote_Call_Interface (Lib_Entity) then
3945 Error_Pragma ("pragma% only apply to rci unit");
3947 -- Set flag for entity of the library unit
3950 Set_Has_All_Calls_Remote (Lib_Entity);
3954 end All_Calls_Remote;
3960 -- pragma Annotate (IDENTIFIER {, ARG});
3961 -- ARG ::= NAME | EXPRESSION
3963 when Pragma_Annotate => Annotate : begin
3965 Check_At_Least_N_Arguments (1);
3966 Check_Arg_Is_Identifier (Arg1);
3969 Arg : Node_Id := Arg2;
3973 while Present (Arg) loop
3974 Exp := Expression (Arg);
3977 if Is_Entity_Name (Exp) then
3980 elsif Nkind (Exp) = N_String_Literal then
3981 Resolve (Exp, Standard_String);
3983 elsif Is_Overloaded (Exp) then
3984 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
3999 -- pragma Assert (Boolean_EXPRESSION [, static_string_EXPRESSION]);
4001 when Pragma_Assert =>
4003 Check_No_Identifiers;
4005 if Arg_Count > 1 then
4006 Check_Arg_Count (2);
4007 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4010 -- If expansion is active and assertions are inactive, then
4011 -- we rewrite the Assertion as:
4013 -- if False and then condition then
4017 -- The reason we do this rewriting during semantic analysis
4018 -- rather than as part of normal expansion is that we cannot
4019 -- analyze and expand the code for the boolean expression
4020 -- directly, or it may cause insertion of actions that would
4021 -- escape the attempt to suppress the assertion code.
4023 if Expander_Active and not Assertions_Enabled then
4025 Make_If_Statement (Loc,
4028 Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
4029 Right_Opnd => Get_Pragma_Arg (Arg1)),
4030 Then_Statements => New_List (
4031 Make_Null_Statement (Loc))));
4035 -- Otherwise (if assertions are enabled, or if we are not
4036 -- operating with expansion active), then we just analyze
4037 -- and resolve the expression.
4040 Analyze_And_Resolve (Expression (Arg1), Any_Boolean);
4047 -- pragma AST_Entry (entry_IDENTIFIER);
4049 when Pragma_AST_Entry => AST_Entry : declare
4055 Check_Arg_Count (1);
4056 Check_No_Identifiers;
4057 Check_Arg_Is_Local_Name (Arg1);
4058 Ent := Entity (Expression (Arg1));
4060 -- Note: the implementation of the AST_Entry pragma could handle
4061 -- the entry family case fine, but for now we are consistent with
4062 -- the DEC rules, and do not allow the pragma, which of course
4063 -- has the effect of also forbidding the attribute.
4065 if Ekind (Ent) /= E_Entry then
4067 ("pragma% argument must be simple entry name", Arg1);
4069 elsif Is_AST_Entry (Ent) then
4071 ("duplicate % pragma for entry", Arg1);
4073 elsif Has_Homonym (Ent) then
4075 ("pragma% argument cannot specify overloaded entry", Arg1);
4079 FF : constant Entity_Id := First_Formal (Ent);
4082 if Present (FF) then
4083 if Present (Next_Formal (FF)) then
4085 ("entry for pragma% can have only one argument",
4088 elsif Parameter_Mode (FF) /= E_In_Parameter then
4090 ("entry parameter for pragma% must have mode IN",
4096 Set_Is_AST_Entry (Ent);
4104 -- pragma Asynchronous (LOCAL_NAME);
4106 when Pragma_Asynchronous => Asynchronous : declare
4114 procedure Process_Async_Pragma;
4115 -- Common processing for procedure and access-to-procedure case
4117 --------------------------
4118 -- Process_Async_Pragma --
4119 --------------------------
4121 procedure Process_Async_Pragma is
4123 if not Present (L) then
4124 Set_Is_Asynchronous (Nm);
4128 -- The formals should be of mode IN (RM E.4.1(6))
4131 while Present (S) loop
4132 Formal := Defining_Identifier (S);
4134 if Nkind (Formal) = N_Defining_Identifier
4135 and then Ekind (Formal) /= E_In_Parameter
4138 ("pragma% procedure can only have IN parameter",
4145 Set_Is_Asynchronous (Nm);
4146 end Process_Async_Pragma;
4148 -- Start of processing for pragma Asynchronous
4151 Check_Ada_83_Warning;
4152 Check_No_Identifiers;
4153 Check_Arg_Count (1);
4154 Check_Arg_Is_Local_Name (Arg1);
4156 if Debug_Flag_U then
4160 C_Ent := Cunit_Entity (Current_Sem_Unit);
4161 Analyze (Expression (Arg1));
4162 Nm := Entity (Expression (Arg1));
4164 if not Is_Remote_Call_Interface (C_Ent)
4165 and then not Is_Remote_Types (C_Ent)
4167 -- This pragma should only appear in an RCI or Remote Types
4168 -- unit (RM E.4.1(4))
4171 ("pragma% not in Remote_Call_Interface or " &
4172 "Remote_Types unit");
4175 if Ekind (Nm) = E_Procedure
4176 and then Nkind (Parent (Nm)) = N_Procedure_Specification
4178 if not Is_Remote_Call_Interface (Nm) then
4180 ("pragma% cannot be applied on non-remote procedure",
4184 L := Parameter_Specifications (Parent (Nm));
4185 Process_Async_Pragma;
4188 elsif Ekind (Nm) = E_Function then
4190 ("pragma% cannot be applied to function", Arg1);
4192 elsif Ekind (Nm) = E_Record_Type
4193 and then Present (Corresponding_Remote_Type (Nm))
4195 N := Declaration_Node (Corresponding_Remote_Type (Nm));
4197 if Nkind (N) = N_Full_Type_Declaration
4198 and then Nkind (Type_Definition (N)) =
4199 N_Access_Procedure_Definition
4201 L := Parameter_Specifications (Type_Definition (N));
4202 Process_Async_Pragma;
4206 ("pragma% cannot reference access-to-function type",
4210 -- Only other possibility is Access-to-class-wide type
4212 elsif Is_Access_Type (Nm)
4213 and then Is_Class_Wide_Type (Designated_Type (Nm))
4215 Check_First_Subtype (Arg1);
4216 Set_Is_Asynchronous (Nm);
4217 if Expander_Active then
4218 RACW_Type_Is_Asynchronous (Nm);
4222 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
4230 -- pragma Atomic (LOCAL_NAME);
4232 when Pragma_Atomic =>
4233 Process_Atomic_Shared_Volatile;
4235 -----------------------
4236 -- Atomic_Components --
4237 -----------------------
4239 -- pragma Atomic_Components (array_LOCAL_NAME);
4241 -- This processing is shared by Volatile_Components
4243 when Pragma_Atomic_Components |
4244 Pragma_Volatile_Components =>
4246 Atomic_Components : declare
4253 Check_Ada_83_Warning;
4254 Check_No_Identifiers;
4255 Check_Arg_Count (1);
4256 Check_Arg_Is_Local_Name (Arg1);
4257 E_Id := Expression (Arg1);
4259 if Etype (E_Id) = Any_Type then
4265 if Rep_Item_Too_Early (E, N)
4267 Rep_Item_Too_Late (E, N)
4272 D := Declaration_Node (E);
4275 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
4277 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
4278 and then Nkind (D) = N_Object_Declaration
4279 and then Nkind (Object_Definition (D)) =
4280 N_Constrained_Array_Definition)
4282 -- The flag is set on the object, or on the base type
4284 if Nkind (D) /= N_Object_Declaration then
4288 Set_Has_Volatile_Components (E);
4290 if Prag_Id = Pragma_Atomic_Components then
4291 Set_Has_Atomic_Components (E);
4293 if Is_Packed (E) then
4294 Set_Is_Packed (E, False);
4297 ("?Pack canceled, cannot pack atomic components",
4303 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
4305 end Atomic_Components;
4307 --------------------
4308 -- Attach_Handler --
4309 --------------------
4311 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
4313 when Pragma_Attach_Handler =>
4314 Check_Ada_83_Warning;
4315 Check_No_Identifiers;
4316 Check_Arg_Count (2);
4318 if No_Run_Time_Mode then
4319 Error_Msg_CRT ("Attach_Handler pragma", N);
4321 Check_Interrupt_Or_Attach_Handler;
4323 -- The expression that designates the attribute may
4324 -- depend on a discriminant, and is therefore a per-
4325 -- object expression, to be expanded in the init proc.
4326 -- If expansion is enabled, perform semantic checks
4329 if Expander_Active then
4331 Temp : constant Node_Id :=
4332 New_Copy_Tree (Expression (Arg2));
4334 Set_Parent (Temp, N);
4335 Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
4339 Analyze (Expression (Arg2));
4340 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
4343 Process_Interrupt_Or_Attach_Handler;
4346 --------------------
4347 -- C_Pass_By_Copy --
4348 --------------------
4350 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
4352 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
4358 Check_Valid_Configuration_Pragma;
4359 Check_Arg_Count (1);
4360 Check_Optional_Identifier (Arg1, "max_size");
4362 Arg := Expression (Arg1);
4363 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
4365 Val := Expr_Value (Arg);
4369 ("maximum size for pragma% must be positive", Arg1);
4371 elsif UI_Is_In_Int_Range (Val) then
4372 Default_C_Record_Mechanism := UI_To_Int (Val);
4374 -- If a giant value is given, Int'Last will do well enough.
4375 -- If sometime someone complains that a record larger than
4376 -- two gigabytes is not copied, we will worry about it then!
4379 Default_C_Record_Mechanism := Mechanism_Type'Last;
4387 -- pragma Comment (static_string_EXPRESSION)
4389 -- Processing for pragma Comment shares the circuitry for
4390 -- pragma Ident. The only differences are that Ident enforces
4391 -- a limit of 31 characters on its argument, and also enforces
4392 -- limitations on placement for DEC compatibility. Pragma
4393 -- Comment shares neither of these restrictions.
4399 -- pragma Common_Object (
4400 -- [Internal =>] LOCAL_NAME,
4401 -- [, [External =>] EXTERNAL_SYMBOL]
4402 -- [, [Size =>] EXTERNAL_SYMBOL]);
4404 -- Processing for this pragma is shared with Psect_Object
4406 --------------------------
4407 -- Compile_Time_Warning --
4408 --------------------------
4410 -- pragma Compile_Time_Warning
4411 -- (boolean_EXPRESSION, static_string_EXPRESSION);
4413 when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
4414 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
4418 Check_Arg_Count (2);
4419 Check_No_Identifiers;
4420 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4421 Analyze_And_Resolve (Arg1x, Standard_Boolean);
4423 if Compile_Time_Known_Value (Arg1x) then
4424 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
4425 String_To_Name_Buffer (Strval (Get_Pragma_Arg (Arg2)));
4426 Add_Char_To_Name_Buffer ('?');
4429 Msg : String (1 .. Name_Len) :=
4430 Name_Buffer (1 .. Name_Len);
4435 -- This loop looks for multiple lines separated by
4436 -- ASCII.LF and breaks them into continuation error
4437 -- messages marked with the usual back slash.
4440 for S in 2 .. Msg'Length - 1 loop
4441 if Msg (S) = ASCII.LF then
4443 Error_Msg_N (Msg (B .. S), Arg1);
4449 Error_Msg_N (Msg (B .. Msg'Length), Arg1);
4453 end Compile_Time_Warning;
4455 ----------------------------
4456 -- Complex_Representation --
4457 ----------------------------
4459 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
4461 when Pragma_Complex_Representation => Complex_Representation : declare
4468 Check_Arg_Count (1);
4469 Check_Optional_Identifier (Arg1, Name_Entity);
4470 Check_Arg_Is_Local_Name (Arg1);
4471 E_Id := Expression (Arg1);
4473 if Etype (E_Id) = Any_Type then
4479 if not Is_Record_Type (E) then
4481 ("argument for pragma% must be record type", Arg1);
4484 Ent := First_Entity (E);
4487 or else No (Next_Entity (Ent))
4488 or else Present (Next_Entity (Next_Entity (Ent)))
4489 or else not Is_Floating_Point_Type (Etype (Ent))
4490 or else Etype (Ent) /= Etype (Next_Entity (Ent))
4493 ("record for pragma% must have two fields of same fpt type",
4497 Set_Has_Complex_Representation (Base_Type (E));
4499 end Complex_Representation;
4501 -------------------------
4502 -- Component_Alignment --
4503 -------------------------
4505 -- pragma Component_Alignment (
4506 -- [Form =>] ALIGNMENT_CHOICE
4507 -- [, [Name =>] type_LOCAL_NAME]);
4509 -- ALIGNMENT_CHOICE ::=
4511 -- | Component_Size_4
4515 when Pragma_Component_Alignment => Component_AlignmentP : declare
4516 Args : Args_List (1 .. 2);
4517 Names : constant Name_List (1 .. 2) := (
4521 Form : Node_Id renames Args (1);
4522 Name : Node_Id renames Args (2);
4524 Atype : Component_Alignment_Kind;
4529 Gather_Associations (Names, Args);
4532 Error_Pragma ("missing Form argument for pragma%");
4535 Check_Arg_Is_Identifier (Form);
4537 -- Get proper alignment, note that Default = Component_Size
4538 -- on all machines we have so far, and we want to set this
4539 -- value rather than the default value to indicate that it
4540 -- has been explicitly set (and thus will not get overridden
4541 -- by the default component alignment for the current scope)
4543 if Chars (Form) = Name_Component_Size then
4544 Atype := Calign_Component_Size;
4546 elsif Chars (Form) = Name_Component_Size_4 then
4547 Atype := Calign_Component_Size_4;
4549 elsif Chars (Form) = Name_Default then
4550 Atype := Calign_Component_Size;
4552 elsif Chars (Form) = Name_Storage_Unit then
4553 Atype := Calign_Storage_Unit;
4557 ("invalid Form parameter for pragma%", Form);
4560 -- Case with no name, supplied, affects scope table entry
4564 (Scope_Stack.Last).Component_Alignment_Default := Atype;
4566 -- Case of name supplied
4569 Check_Arg_Is_Local_Name (Name);
4571 Typ := Entity (Name);
4574 or else Rep_Item_Too_Early (Typ, N)
4578 Typ := Underlying_Type (Typ);
4581 if not Is_Record_Type (Typ)
4582 and then not Is_Array_Type (Typ)
4585 ("Name parameter of pragma% must identify record or " &
4586 "array type", Name);
4589 -- An explicit Component_Alignment pragma overrides an
4590 -- implicit pragma Pack, but not an explicit one.
4592 if not Has_Pragma_Pack (Base_Type (Typ)) then
4593 Set_Is_Packed (Base_Type (Typ), False);
4594 Set_Component_Alignment (Base_Type (Typ), Atype);
4597 end Component_AlignmentP;
4603 -- pragma Controlled (first_subtype_LOCAL_NAME);
4605 when Pragma_Controlled => Controlled : declare
4609 Check_No_Identifiers;
4610 Check_Arg_Count (1);
4611 Check_Arg_Is_Local_Name (Arg1);
4612 Arg := Expression (Arg1);
4614 if not Is_Entity_Name (Arg)
4615 or else not Is_Access_Type (Entity (Arg))
4617 Error_Pragma_Arg ("pragma% requires access type", Arg1);
4619 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
4627 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
4628 -- [Entity =>] LOCAL_NAME);
4630 when Pragma_Convention => Convention : declare
4634 Check_Ada_83_Warning;
4635 Check_Arg_Count (2);
4636 Process_Convention (C, E);
4639 ---------------------------
4640 -- Convention_Identifier --
4641 ---------------------------
4643 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
4644 -- [Convention =>] convention_IDENTIFIER);
4646 when Pragma_Convention_Identifier => Convention_Identifier : declare
4652 Check_Arg_Count (2);
4653 Check_Optional_Identifier (Arg1, Name_Name);
4654 Check_Optional_Identifier (Arg2, Name_Convention);
4655 Check_Arg_Is_Identifier (Arg1);
4656 Check_Arg_Is_Identifier (Arg1);
4657 Idnam := Chars (Expression (Arg1));
4658 Cname := Chars (Expression (Arg2));
4660 if Is_Convention_Name (Cname) then
4661 Record_Convention_Identifier
4662 (Idnam, Get_Convention_Id (Cname));
4665 ("second arg for % pragma must be convention", Arg2);
4667 end Convention_Identifier;
4673 -- pragma CPP_Class ([Entity =>] local_NAME)
4675 when Pragma_CPP_Class => CPP_Class : declare
4678 Default_DTC : Entity_Id := Empty;
4679 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4685 Check_Arg_Count (1);
4686 Check_Optional_Identifier (Arg1, Name_Entity);
4687 Check_Arg_Is_Local_Name (Arg1);
4689 Arg := Expression (Arg1);
4692 if Etype (Arg) = Any_Type then
4696 if not Is_Entity_Name (Arg)
4697 or else not Is_Type (Entity (Arg))
4699 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
4702 Typ := Entity (Arg);
4704 if not Is_Record_Type (Typ) then
4705 Error_Pragma_Arg ("pragma% applicable to a record, "
4706 & "tagged record or record extension", Arg1);
4709 Default_DTC := First_Component (Typ);
4710 while Present (Default_DTC)
4711 and then Etype (Default_DTC) /= VTP_Type
4713 Next_Component (Default_DTC);
4716 -- Case of non tagged type
4718 if not Is_Tagged_Type (Typ) then
4719 Set_Is_CPP_Class (Typ);
4721 if Present (Default_DTC) then
4723 ("only tagged records can contain vtable pointers", Arg1);
4726 -- Case of tagged type with no vtable ptr
4728 -- What is test for Typ = Root_Typ (Typ) about here ???
4730 elsif Is_Tagged_Type (Typ)
4731 and then Typ = Root_Type (Typ)
4732 and then No (Default_DTC)
4735 ("a cpp_class must contain a vtable pointer", Arg1);
4737 -- Tagged type that has a vtable ptr
4739 elsif Present (Default_DTC) then
4740 Set_Is_CPP_Class (Typ);
4741 Set_Is_Limited_Record (Typ);
4742 Set_Is_Tag (Default_DTC);
4743 Set_DT_Entry_Count (Default_DTC, No_Uint);
4745 -- Since a CPP type has no direct link to its associated tag
4746 -- most tags checks cannot be performed
4748 Set_Kill_Tag_Checks (Typ);
4749 Set_Kill_Tag_Checks (Class_Wide_Type (Typ));
4751 -- Get rid of the _tag component when there was one.
4752 -- It is only useful for regular tagged types
4754 if Expander_Active and then Typ = Root_Type (Typ) then
4756 Tag_C := Tag_Component (Typ);
4757 C := First_Entity (Typ);
4760 Set_First_Entity (Typ, Next_Entity (Tag_C));
4763 while Next_Entity (C) /= Tag_C loop
4767 Set_Next_Entity (C, Next_Entity (Tag_C));
4773 ---------------------
4774 -- CPP_Constructor --
4775 ---------------------
4777 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME);
4779 when Pragma_CPP_Constructor => CPP_Constructor : declare
4785 Check_Arg_Count (1);
4786 Check_Optional_Identifier (Arg1, Name_Entity);
4787 Check_Arg_Is_Local_Name (Arg1);
4789 Id := Expression (Arg1);
4790 Find_Program_Unit_Name (Id);
4792 -- If we did not find the name, we are done
4794 if Etype (Id) = Any_Type then
4798 Def_Id := Entity (Id);
4800 if Ekind (Def_Id) = E_Function
4801 and then Is_Class_Wide_Type (Etype (Def_Id))
4802 and then Is_CPP_Class (Etype (Etype (Def_Id)))
4804 -- What the heck is this??? this pragma allows only 1 arg
4806 if Arg_Count >= 2 then
4807 Check_At_Most_N_Arguments (3);
4808 Process_Interface_Name (Def_Id, Arg2, Arg3);
4811 if No (Parameter_Specifications (Parent (Def_Id))) then
4812 Set_Has_Completion (Def_Id);
4813 Set_Is_Constructor (Def_Id);
4816 ("non-default constructors not implemented", Arg1);
4821 ("pragma% requires function returning a 'C'P'P_Class type",
4824 end CPP_Constructor;
4830 -- pragma CPP_Virtual
4831 -- [Entity =>] LOCAL_NAME
4832 -- [ [Vtable_Ptr =>] LOCAL_NAME,
4833 -- [Position =>] static_integer_EXPRESSION]);
4835 when Pragma_CPP_Virtual => CPP_Virtual : declare
4839 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4846 if Arg_Count = 3 then
4847 Check_Optional_Identifier (Arg2, "vtable_ptr");
4849 -- We allow Entry_Count as well as Position for the third
4850 -- parameter for back compatibility with versions of GNAT
4851 -- before version 3.12. The documentation has always said
4852 -- Position, but the code up to 3.12 said Entry_Count.
4854 if Chars (Arg3) /= Name_Position then
4855 Check_Optional_Identifier (Arg3, "entry_count");
4859 Check_Arg_Count (1);
4862 Check_Optional_Identifier (Arg1, Name_Entity);
4863 Check_Arg_Is_Local_Name (Arg1);
4865 -- First argument must be a subprogram name
4867 Arg := Expression (Arg1);
4868 Find_Program_Unit_Name (Arg);
4870 if Etype (Arg) = Any_Type then
4873 Subp := Entity (Arg);
4876 if not (Is_Subprogram (Subp)
4877 and then Is_Dispatching_Operation (Subp))
4880 ("pragma% must reference a primitive operation", Arg1);
4883 Typ := Find_Dispatching_Type (Subp);
4885 -- If only one Argument defaults are :
4886 -- . DTC_Entity is the default Vtable pointer
4887 -- . DT_Position will be set at the freezing point
4889 if Arg_Count = 1 then
4890 Set_DTC_Entity (Subp, Tag_Component (Typ));
4894 -- Second argument is a component name of type Vtable_Ptr
4896 Arg := Expression (Arg2);
4898 if Nkind (Arg) /= N_Identifier then
4899 Error_Msg_NE ("must be a& component name", Arg, Typ);
4903 DTC := First_Component (Typ);
4904 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
4905 Next_Component (DTC);
4909 Error_Msg_NE ("must be a& component name", Arg, Typ);
4912 elsif Etype (DTC) /= VTP_Type then
4913 Wrong_Type (Arg, VTP_Type);
4917 -- Third argument is an integer (DT_Position)
4919 Arg := Expression (Arg3);
4920 Analyze_And_Resolve (Arg, Any_Integer);
4922 if not Is_Static_Expression (Arg) then
4923 Flag_Non_Static_Expr
4924 ("third argument of pragma CPP_Virtual must be static!",
4929 V := Expr_Value (Expression (Arg3));
4933 ("third argument of pragma% must be positive",
4937 Set_DTC_Entity (Subp, DTC);
4938 Set_DT_Position (Subp, V);
4947 -- pragma CPP_Vtable (
4948 -- [Entity =>] LOCAL_NAME
4949 -- [Vtable_Ptr =>] LOCAL_NAME,
4950 -- [Entry_Count =>] static_integer_EXPRESSION);
4952 when Pragma_CPP_Vtable => CPP_Vtable : declare
4955 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4962 Check_Arg_Count (3);
4963 Check_Optional_Identifier (Arg1, Name_Entity);
4964 Check_Optional_Identifier (Arg2, "vtable_ptr");
4965 Check_Optional_Identifier (Arg3, "entry_count");
4966 Check_Arg_Is_Local_Name (Arg1);
4968 -- First argument is a record type name
4970 Arg := Expression (Arg1);
4973 if Etype (Arg) = Any_Type then
4976 Typ := Entity (Arg);
4979 if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
4980 Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
4983 -- Second argument is a component name of type Vtable_Ptr
4985 Arg := Expression (Arg2);
4987 if Nkind (Arg) /= N_Identifier then
4988 Error_Msg_NE ("must be a& component name", Arg, Typ);
4992 DTC := First_Component (Typ);
4993 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
4994 Next_Component (DTC);
4998 Error_Msg_NE ("must be a& component name", Arg, Typ);
5001 elsif Etype (DTC) /= VTP_Type then
5002 Wrong_Type (DTC, VTP_Type);
5005 -- If it is the first pragma Vtable, This becomes the default tag
5007 elsif (not Is_Tag (DTC))
5008 and then DT_Entry_Count (Tag_Component (Typ)) = No_Uint
5010 Set_Is_Tag (Tag_Component (Typ), False);
5011 Set_Is_Tag (DTC, True);
5012 Set_DT_Entry_Count (DTC, No_Uint);
5015 -- Those pragmas must appear before any primitive operation
5016 -- definition (except inherited ones) otherwise the default
5019 Elmt := First_Elmt (Primitive_Operations (Typ));
5020 while Present (Elmt) loop
5021 if No (Alias (Node (Elmt))) then
5022 Error_Msg_Sloc := Sloc (Node (Elmt));
5024 ("pragma% must appear before this primitive operation");
5030 -- Third argument is an integer (DT_Entry_Count)
5032 Arg := Expression (Arg3);
5033 Analyze_And_Resolve (Arg, Any_Integer);
5035 if not Is_Static_Expression (Arg) then
5036 Flag_Non_Static_Expr
5037 ("entry count for pragma CPP_Vtable must be a static " &
5038 "expression!", Arg3);
5042 V := Expr_Value (Expression (Arg3));
5046 ("entry count for pragma% must be positive", Arg3);
5048 Set_DT_Entry_Count (DTC, V);
5057 -- pragma Debug (PROCEDURE_CALL_STATEMENT);
5059 when Pragma_Debug => Debug : begin
5062 -- If assertions are enabled, and we are expanding code, then
5063 -- we rewrite the pragma with its corresponding procedure call
5064 -- and then analyze the call.
5066 if Assertions_Enabled and Expander_Active then
5067 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5070 -- Otherwise we work a bit to get a tree that makes sense
5071 -- for ASIS purposes, namely a pragma with an analyzed
5072 -- argument that looks like a procedure call.
5075 Expander_Mode_Save_And_Set (False);
5076 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5080 Chars => Name_Debug,
5081 Pragma_Argument_Associations =>
5082 New_List (Relocate_Node (N))));
5083 Expander_Mode_Restore;
5091 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
5093 when Pragma_Discard_Names => Discard_Names : declare
5098 Check_Ada_83_Warning;
5100 -- Deal with configuration pragma case
5102 if Arg_Count = 0 and then Is_Configuration_Pragma then
5103 Global_Discard_Names := True;
5106 -- Otherwise, check correct appropriate context
5109 Check_Is_In_Decl_Part_Or_Package_Spec;
5111 if Arg_Count = 0 then
5113 -- If there is no parameter, then from now on this pragma
5114 -- applies to any enumeration, exception or tagged type
5115 -- defined in the current declarative part.
5117 Set_Discard_Names (Current_Scope);
5121 Check_Arg_Count (1);
5122 Check_Optional_Identifier (Arg1, Name_On);
5123 Check_Arg_Is_Local_Name (Arg1);
5124 E_Id := Expression (Arg1);
5126 if Etype (E_Id) = Any_Type then
5132 if (Is_First_Subtype (E)
5133 and then (Is_Enumeration_Type (E)
5134 or else Is_Tagged_Type (E)))
5135 or else Ekind (E) = E_Exception
5137 Set_Discard_Names (E);
5140 ("inappropriate entity for pragma%", Arg1);
5150 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
5152 when Pragma_Elaborate => Elaborate : declare
5154 Parent_Node : Node_Id;
5159 -- Pragma must be in context items list of a compilation unit
5161 if not Is_List_Member (N) then
5166 Plist := List_Containing (N);
5167 Parent_Node := Parent (Plist);
5169 if Parent_Node = Empty
5170 or else Nkind (Parent_Node) /= N_Compilation_Unit
5171 or else Context_Items (Parent_Node) /= Plist
5178 -- Must be at least one argument
5180 if Arg_Count = 0 then
5181 Error_Pragma ("pragma% requires at least one argument");
5184 -- In Ada 83 mode, there can be no items following it in the
5185 -- context list except other pragmas and implicit with clauses
5186 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
5187 -- placement rule does not apply.
5189 if Ada_83 and then Comes_From_Source (N) then
5192 while Present (Citem) loop
5193 if Nkind (Citem) = N_Pragma
5194 or else (Nkind (Citem) = N_With_Clause
5195 and then Implicit_With (Citem))
5200 ("(Ada 83) pragma% must be at end of context clause");
5207 -- Finally, the arguments must all be units mentioned in a with
5208 -- clause in the same context clause. Note we already checked
5209 -- (in Par.Prag) that the arguments are either identifiers or
5212 Outer : while Present (Arg) loop
5213 Citem := First (Plist);
5215 Inner : while Citem /= N loop
5216 if Nkind (Citem) = N_With_Clause
5217 and then Same_Name (Name (Citem), Expression (Arg))
5219 Set_Elaborate_Present (Citem, True);
5220 Set_Unit_Name (Expression (Arg), Name (Citem));
5221 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5230 ("argument of pragma% is not with'ed unit", Arg);
5236 -- Give a warning if operating in static mode with -gnatwl
5237 -- (elaboration warnings eanbled) switch set.
5239 if Elab_Warnings and not Dynamic_Elaboration_Checks then
5241 ("?use of pragma Elaborate may not be safe", N);
5243 ("?use pragma Elaborate_All instead if possible", N);
5251 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
5253 when Pragma_Elaborate_All => Elaborate_All : declare
5255 Parent_Node : Node_Id;
5260 Check_Ada_83_Warning;
5262 -- Pragma must be in context items list of a compilation unit
5264 if not Is_List_Member (N) then
5269 Plist := List_Containing (N);
5270 Parent_Node := Parent (Plist);
5272 if Parent_Node = Empty
5273 or else Nkind (Parent_Node) /= N_Compilation_Unit
5274 or else Context_Items (Parent_Node) /= Plist
5281 -- Must be at least one argument
5283 if Arg_Count = 0 then
5284 Error_Pragma ("pragma% requires at least one argument");
5287 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
5288 -- have to appear at the end of the context clause, but may
5289 -- appear mixed in with other items, even in Ada 83 mode.
5291 -- Final check: the arguments must all be units mentioned in
5292 -- a with clause in the same context clause. Note that we
5293 -- already checked (in Par.Prag) that all the arguments are
5294 -- either identifiers or selected components.
5297 Outr : while Present (Arg) loop
5298 Citem := First (Plist);
5300 Innr : while Citem /= N loop
5301 if Nkind (Citem) = N_With_Clause
5302 and then Same_Name (Name (Citem), Expression (Arg))
5304 Set_Elaborate_All_Present (Citem, True);
5305 Set_Unit_Name (Expression (Arg), Name (Citem));
5306 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5314 Set_Error_Posted (N);
5316 ("argument of pragma% is not with'ed unit", Arg);
5323 --------------------
5324 -- Elaborate_Body --
5325 --------------------
5327 -- pragma Elaborate_Body [( library_unit_NAME )];
5329 when Pragma_Elaborate_Body => Elaborate_Body : declare
5330 Cunit_Node : Node_Id;
5331 Cunit_Ent : Entity_Id;
5334 Check_Ada_83_Warning;
5335 Check_Valid_Library_Unit_Pragma;
5337 if Nkind (N) = N_Null_Statement then
5341 Cunit_Node := Cunit (Current_Sem_Unit);
5342 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
5344 if Nkind (Unit (Cunit_Node)) = N_Package_Body
5346 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
5348 Error_Pragma ("pragma% must refer to a spec, not a body");
5350 Set_Body_Required (Cunit_Node, True);
5351 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
5353 -- If we are in dynamic elaboration mode, then we suppress
5354 -- elaboration warnings for the unit, since it is definitely
5355 -- fine NOT to do dynamic checks at the first level (and such
5356 -- checks will be suppressed because no elaboration boolean
5357 -- is created for Elaborate_Body packages).
5359 -- But in the static model of elaboration, Elaborate_Body is
5360 -- definitely NOT good enough to ensure elaboration safety on
5361 -- its own, since the body may WITH other units that are not
5362 -- safe from an elaboration point of view, so a client must
5363 -- still do an Elaborate_All on such units.
5365 -- Debug flag -gnatdD restores the old behavior of 3.13,
5366 -- where Elaborate_Body always suppressed elab warnings.
5368 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
5369 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
5374 ------------------------
5375 -- Elaboration_Checks --
5376 ------------------------
5378 -- pragma Elaboration_Checks (Static | Dynamic);
5380 when Pragma_Elaboration_Checks =>
5382 Check_Arg_Count (1);
5383 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
5384 Dynamic_Elaboration_Checks :=
5385 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
5391 -- pragma Eliminate (
5392 -- [Unit_Name =>] IDENTIFIER |
5393 -- SELECTED_COMPONENT
5394 -- [,[Entity =>] IDENTIFIER |
5395 -- SELECTED_COMPONENT |
5397 -- [,]OVERLOADING_RESOLUTION);
5399 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
5402 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
5405 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
5407 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
5408 -- Result_Type => result_SUBTYPE_NAME]
5410 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
5411 -- SUBTYPE_NAME ::= STRING_LITERAL
5413 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
5414 -- SOURCE_TRACE ::= STRING_LITERAL
5416 when Pragma_Eliminate => Eliminate : declare
5417 Args : Args_List (1 .. 5);
5418 Names : constant Name_List (1 .. 5) := (
5421 Name_Parameter_Types,
5423 Name_Source_Location);
5425 Unit_Name : Node_Id renames Args (1);
5426 Entity : Node_Id renames Args (2);
5427 Parameter_Types : Node_Id renames Args (3);
5428 Result_Type : Node_Id renames Args (4);
5429 Source_Location : Node_Id renames Args (5);
5433 Check_Valid_Configuration_Pragma;
5434 Gather_Associations (Names, Args);
5436 if No (Unit_Name) then
5437 Error_Pragma ("missing Unit_Name argument for pragma%");
5441 and then (Present (Parameter_Types)
5443 Present (Result_Type)
5445 Present (Source_Location))
5447 Error_Pragma ("missing Entity argument for pragma%");
5450 if (Present (Parameter_Types)
5452 Present (Result_Type))
5454 Present (Source_Location)
5457 ("parameter profile and source location can not " &
5458 "be used together in pragma%");
5461 Process_Eliminate_Pragma
5470 --------------------------
5471 -- Explicit_Overriding --
5472 --------------------------
5474 when Pragma_Explicit_Overriding =>
5475 Check_Valid_Configuration_Pragma;
5476 Check_Arg_Count (0);
5477 Explicit_Overriding := True;
5484 -- [ Convention =>] convention_IDENTIFIER,
5485 -- [ Entity =>] local_NAME
5486 -- [, [External_Name =>] static_string_EXPRESSION ]
5487 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5489 when Pragma_Export => Export : declare
5494 Check_Ada_83_Warning;
5495 Check_At_Least_N_Arguments (2);
5496 Check_At_Most_N_Arguments (4);
5497 Process_Convention (C, Def_Id);
5499 if Ekind (Def_Id) /= E_Constant then
5500 Note_Possible_Modification (Expression (Arg2));
5503 Process_Interface_Name (Def_Id, Arg3, Arg4);
5504 Set_Exported (Def_Id, Arg2);
5507 ----------------------
5508 -- Export_Exception --
5509 ----------------------
5511 -- pragma Export_Exception (
5512 -- [Internal =>] LOCAL_NAME,
5513 -- [, [External =>] EXTERNAL_SYMBOL,]
5514 -- [, [Form =>] Ada | VMS]
5515 -- [, [Code =>] static_integer_EXPRESSION]);
5517 when Pragma_Export_Exception => Export_Exception : declare
5518 Args : Args_List (1 .. 4);
5519 Names : constant Name_List (1 .. 4) := (
5525 Internal : Node_Id renames Args (1);
5526 External : Node_Id renames Args (2);
5527 Form : Node_Id renames Args (3);
5528 Code : Node_Id renames Args (4);
5531 if Inside_A_Generic then
5532 Error_Pragma ("pragma% cannot be used for generic entities");
5535 Gather_Associations (Names, Args);
5536 Process_Extended_Import_Export_Exception_Pragma (
5537 Arg_Internal => Internal,
5538 Arg_External => External,
5542 if not Is_VMS_Exception (Entity (Internal)) then
5543 Set_Exported (Entity (Internal), Internal);
5545 end Export_Exception;
5547 ---------------------
5548 -- Export_Function --
5549 ---------------------
5551 -- pragma Export_Function (
5552 -- [Internal =>] LOCAL_NAME,
5553 -- [, [External =>] EXTERNAL_SYMBOL,]
5554 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5555 -- [, [Result_Type =>] TYPE_DESIGNATOR]
5556 -- [, [Mechanism =>] MECHANISM]
5557 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
5559 -- EXTERNAL_SYMBOL ::=
5561 -- | static_string_EXPRESSION
5563 -- PARAMETER_TYPES ::=
5565 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5567 -- TYPE_DESIGNATOR ::=
5569 -- | subtype_Name ' Access
5573 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5575 -- MECHANISM_ASSOCIATION ::=
5576 -- [formal_parameter_NAME =>] MECHANISM_NAME
5578 -- MECHANISM_NAME ::=
5581 -- | Descriptor [([Class =>] CLASS_NAME)]
5583 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5585 when Pragma_Export_Function => Export_Function : declare
5586 Args : Args_List (1 .. 6);
5587 Names : constant Name_List (1 .. 6) := (
5590 Name_Parameter_Types,
5593 Name_Result_Mechanism);
5595 Internal : Node_Id renames Args (1);
5596 External : Node_Id renames Args (2);
5597 Parameter_Types : Node_Id renames Args (3);
5598 Result_Type : Node_Id renames Args (4);
5599 Mechanism : Node_Id renames Args (5);
5600 Result_Mechanism : Node_Id renames Args (6);
5604 Gather_Associations (Names, Args);
5605 Process_Extended_Import_Export_Subprogram_Pragma (
5606 Arg_Internal => Internal,
5607 Arg_External => External,
5608 Arg_Parameter_Types => Parameter_Types,
5609 Arg_Result_Type => Result_Type,
5610 Arg_Mechanism => Mechanism,
5611 Arg_Result_Mechanism => Result_Mechanism);
5612 end Export_Function;
5618 -- pragma Export_Object (
5619 -- [Internal =>] LOCAL_NAME,
5620 -- [, [External =>] EXTERNAL_SYMBOL]
5621 -- [, [Size =>] EXTERNAL_SYMBOL]);
5623 -- EXTERNAL_SYMBOL ::=
5625 -- | static_string_EXPRESSION
5627 -- PARAMETER_TYPES ::=
5629 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5631 -- TYPE_DESIGNATOR ::=
5633 -- | subtype_Name ' Access
5637 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5639 -- MECHANISM_ASSOCIATION ::=
5640 -- [formal_parameter_NAME =>] MECHANISM_NAME
5642 -- MECHANISM_NAME ::=
5645 -- | Descriptor [([Class =>] CLASS_NAME)]
5647 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5649 when Pragma_Export_Object => Export_Object : declare
5650 Args : Args_List (1 .. 3);
5651 Names : constant Name_List (1 .. 3) := (
5656 Internal : Node_Id renames Args (1);
5657 External : Node_Id renames Args (2);
5658 Size : Node_Id renames Args (3);
5662 Gather_Associations (Names, Args);
5663 Process_Extended_Import_Export_Object_Pragma (
5664 Arg_Internal => Internal,
5665 Arg_External => External,
5669 ----------------------
5670 -- Export_Procedure --
5671 ----------------------
5673 -- pragma Export_Procedure (
5674 -- [Internal =>] LOCAL_NAME,
5675 -- [, [External =>] EXTERNAL_SYMBOL,]
5676 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5677 -- [, [Mechanism =>] MECHANISM]);
5679 -- EXTERNAL_SYMBOL ::=
5681 -- | static_string_EXPRESSION
5683 -- PARAMETER_TYPES ::=
5685 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5687 -- TYPE_DESIGNATOR ::=
5689 -- | subtype_Name ' Access
5693 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5695 -- MECHANISM_ASSOCIATION ::=
5696 -- [formal_parameter_NAME =>] MECHANISM_NAME
5698 -- MECHANISM_NAME ::=
5701 -- | Descriptor [([Class =>] CLASS_NAME)]
5703 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5705 when Pragma_Export_Procedure => Export_Procedure : declare
5706 Args : Args_List (1 .. 4);
5707 Names : constant Name_List (1 .. 4) := (
5710 Name_Parameter_Types,
5713 Internal : Node_Id renames Args (1);
5714 External : Node_Id renames Args (2);
5715 Parameter_Types : Node_Id renames Args (3);
5716 Mechanism : Node_Id renames Args (4);
5720 Gather_Associations (Names, Args);
5721 Process_Extended_Import_Export_Subprogram_Pragma (
5722 Arg_Internal => Internal,
5723 Arg_External => External,
5724 Arg_Parameter_Types => Parameter_Types,
5725 Arg_Mechanism => Mechanism);
5726 end Export_Procedure;
5732 -- pragma Export_Value (
5733 -- [Value =>] static_integer_EXPRESSION,
5734 -- [Link_Name =>] static_string_EXPRESSION);
5736 when Pragma_Export_Value =>
5738 Check_Arg_Count (2);
5740 Check_Optional_Identifier (Arg1, Name_Value);
5741 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
5743 Check_Optional_Identifier (Arg2, Name_Link_Name);
5744 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
5746 -----------------------------
5747 -- Export_Valued_Procedure --
5748 -----------------------------
5750 -- pragma Export_Valued_Procedure (
5751 -- [Internal =>] LOCAL_NAME,
5752 -- [, [External =>] EXTERNAL_SYMBOL,]
5753 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5754 -- [, [Mechanism =>] MECHANISM]);
5756 -- EXTERNAL_SYMBOL ::=
5758 -- | static_string_EXPRESSION
5760 -- PARAMETER_TYPES ::=
5762 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5764 -- TYPE_DESIGNATOR ::=
5766 -- | subtype_Name ' Access
5770 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5772 -- MECHANISM_ASSOCIATION ::=
5773 -- [formal_parameter_NAME =>] MECHANISM_NAME
5775 -- MECHANISM_NAME ::=
5778 -- | Descriptor [([Class =>] CLASS_NAME)]
5780 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5782 when Pragma_Export_Valued_Procedure =>
5783 Export_Valued_Procedure : declare
5784 Args : Args_List (1 .. 4);
5785 Names : constant Name_List (1 .. 4) := (
5788 Name_Parameter_Types,
5791 Internal : Node_Id renames Args (1);
5792 External : Node_Id renames Args (2);
5793 Parameter_Types : Node_Id renames Args (3);
5794 Mechanism : Node_Id renames Args (4);
5798 Gather_Associations (Names, Args);
5799 Process_Extended_Import_Export_Subprogram_Pragma (
5800 Arg_Internal => Internal,
5801 Arg_External => External,
5802 Arg_Parameter_Types => Parameter_Types,
5803 Arg_Mechanism => Mechanism);
5804 end Export_Valued_Procedure;
5810 -- pragma Extend_System ([Name =>] Identifier);
5812 when Pragma_Extend_System => Extend_System : declare
5815 Check_Valid_Configuration_Pragma;
5816 Check_Arg_Count (1);
5817 Check_Optional_Identifier (Arg1, Name_Name);
5818 Check_Arg_Is_Identifier (Arg1);
5820 Get_Name_String (Chars (Expression (Arg1)));
5823 and then Name_Buffer (1 .. 4) = "aux_"
5825 if Present (System_Extend_Pragma_Arg) then
5826 if Chars (Expression (Arg1)) =
5827 Chars (Expression (System_Extend_Pragma_Arg))
5831 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
5832 Error_Pragma ("pragma% conflicts with that at#");
5836 System_Extend_Pragma_Arg := Arg1;
5838 if not GNAT_Mode then
5839 System_Extend_Unit := Arg1;
5843 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
5847 ------------------------
5848 -- Extensions_Allowed --
5849 ------------------------
5851 -- pragma Extensions_Allowed (ON | OFF);
5853 when Pragma_Extensions_Allowed =>
5855 Check_Arg_Count (1);
5856 Check_No_Identifiers;
5857 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5858 Extensions_Allowed := (Chars (Expression (Arg1)) = Name_On);
5864 -- pragma External (
5865 -- [ Convention =>] convention_IDENTIFIER,
5866 -- [ Entity =>] local_NAME
5867 -- [, [External_Name =>] static_string_EXPRESSION ]
5868 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5870 when Pragma_External => External : declare
5876 Check_At_Least_N_Arguments (2);
5877 Check_At_Most_N_Arguments (4);
5878 Process_Convention (C, Def_Id);
5879 Note_Possible_Modification (Expression (Arg2));
5880 Process_Interface_Name (Def_Id, Arg3, Arg4);
5881 Set_Exported (Def_Id, Arg2);
5884 --------------------------
5885 -- External_Name_Casing --
5886 --------------------------
5888 -- pragma External_Name_Casing (
5889 -- UPPERCASE | LOWERCASE
5890 -- [, AS_IS | UPPERCASE | LOWERCASE]);
5892 when Pragma_External_Name_Casing =>
5894 External_Name_Casing : declare
5897 Check_No_Identifiers;
5899 if Arg_Count = 2 then
5901 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
5903 case Chars (Get_Pragma_Arg (Arg2)) is
5905 Opt.External_Name_Exp_Casing := As_Is;
5907 when Name_Uppercase =>
5908 Opt.External_Name_Exp_Casing := Uppercase;
5910 when Name_Lowercase =>
5911 Opt.External_Name_Exp_Casing := Lowercase;
5918 Check_Arg_Count (1);
5921 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
5923 case Chars (Get_Pragma_Arg (Arg1)) is
5924 when Name_Uppercase =>
5925 Opt.External_Name_Imp_Casing := Uppercase;
5927 when Name_Lowercase =>
5928 Opt.External_Name_Imp_Casing := Lowercase;
5933 end External_Name_Casing;
5935 ---------------------------
5936 -- Finalize_Storage_Only --
5937 ---------------------------
5939 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
5941 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
5942 Assoc : constant Node_Id := Arg1;
5943 Type_Id : constant Node_Id := Expression (Assoc);
5947 Check_No_Identifiers;
5948 Check_Arg_Count (1);
5949 Check_Arg_Is_Local_Name (Arg1);
5951 Find_Type (Type_Id);
5952 Typ := Entity (Type_Id);
5955 or else Rep_Item_Too_Early (Typ, N)
5959 Typ := Underlying_Type (Typ);
5962 if not Is_Controlled (Typ) then
5963 Error_Pragma ("pragma% must specify controlled type");
5966 Check_First_Subtype (Arg1);
5968 if Finalize_Storage_Only (Typ) then
5969 Error_Pragma ("duplicate pragma%, only one allowed");
5971 elsif not Rep_Item_Too_Late (Typ, N) then
5972 Set_Finalize_Storage_Only (Base_Type (Typ), True);
5974 end Finalize_Storage;
5976 --------------------------
5977 -- Float_Representation --
5978 --------------------------
5980 -- pragma Float_Representation (VAX_Float | IEEE_Float);
5982 when Pragma_Float_Representation => Float_Representation : declare
5990 if Arg_Count = 1 then
5991 Check_Valid_Configuration_Pragma;
5993 Check_Arg_Count (2);
5994 Check_Optional_Identifier (Arg2, Name_Entity);
5995 Check_Arg_Is_Local_Name (Arg2);
5998 Check_No_Identifier (Arg1);
5999 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
6001 if not OpenVMS_On_Target then
6002 if Chars (Expression (Arg1)) = Name_VAX_Float then
6004 ("?pragma% ignored (applies only to Open'V'M'S)");
6010 -- One argument case
6012 if Arg_Count = 1 then
6014 if Chars (Expression (Arg1)) = Name_VAX_Float then
6016 if Opt.Float_Format = 'I' then
6017 Error_Pragma ("'I'E'E'E format previously specified");
6020 Opt.Float_Format := 'V';
6023 if Opt.Float_Format = 'V' then
6024 Error_Pragma ("'V'A'X format previously specified");
6027 Opt.Float_Format := 'I';
6030 Set_Standard_Fpt_Formats;
6032 -- Two argument case
6035 Argx := Get_Pragma_Arg (Arg2);
6037 if not Is_Entity_Name (Argx)
6038 or else not Is_Floating_Point_Type (Entity (Argx))
6041 ("second argument of% pragma must be floating-point type",
6045 Ent := Entity (Argx);
6046 Digs := UI_To_Int (Digits_Value (Ent));
6048 -- Two arguments, VAX_Float case
6050 if Chars (Expression (Arg1)) = Name_VAX_Float then
6053 when 6 => Set_F_Float (Ent);
6054 when 9 => Set_D_Float (Ent);
6055 when 15 => Set_G_Float (Ent);
6059 ("wrong digits value, must be 6,9 or 15", Arg2);
6062 -- Two arguments, IEEE_Float case
6066 when 6 => Set_IEEE_Short (Ent);
6067 when 15 => Set_IEEE_Long (Ent);
6071 ("wrong digits value, must be 6 or 15", Arg2);
6075 end Float_Representation;
6081 -- pragma Ident (static_string_EXPRESSION)
6083 -- Note: pragma Comment shares this processing. Pragma Comment
6084 -- is identical to Ident, except that the restriction of the
6085 -- argument to 31 characters and the placement restrictions
6086 -- are not enforced for pragma Comment.
6088 when Pragma_Ident | Pragma_Comment => Ident : declare
6093 Check_Arg_Count (1);
6094 Check_No_Identifiers;
6095 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
6097 -- For pragma Ident, preserve DEC compatibility by requiring
6098 -- the pragma to appear in a declarative part or package spec.
6100 if Prag_Id = Pragma_Ident then
6101 Check_Is_In_Decl_Part_Or_Package_Spec;
6104 Str := Expr_Value_S (Expression (Arg1));
6111 GP := Parent (Parent (N));
6113 if Nkind (GP) = N_Package_Declaration
6115 Nkind (GP) = N_Generic_Package_Declaration
6120 -- If we have a compilation unit, then record the ident
6121 -- value, checking for improper duplication.
6123 if Nkind (GP) = N_Compilation_Unit then
6124 CS := Ident_String (Current_Sem_Unit);
6126 if Present (CS) then
6128 -- For Ident, we do not permit multiple instances
6130 if Prag_Id = Pragma_Ident then
6131 Error_Pragma ("duplicate% pragma not permitted");
6133 -- For Comment, we concatenate the string, unless we
6134 -- want to preserve the tree structure for ASIS.
6136 elsif not ASIS_Mode then
6137 Start_String (Strval (CS));
6138 Store_String_Char (' ');
6139 Store_String_Chars (Strval (Str));
6140 Set_Strval (CS, End_String);
6144 -- In VMS, the effect of IDENT is achieved by passing
6145 -- IDENTIFICATION=name as a --for-linker switch.
6147 if OpenVMS_On_Target then
6150 ("--for-linker=IDENTIFICATION=");
6151 String_To_Name_Buffer (Strval (Str));
6152 Store_String_Chars (Name_Buffer (1 .. Name_Len));
6154 -- Only the last processed IDENT is saved. The main
6155 -- purpose is so an IDENT associated with a main
6156 -- procedure will be used in preference to an IDENT
6157 -- associated with a with'd package.
6159 Replace_Linker_Option_String
6160 (End_String, "--for-linker=IDENTIFICATION=");
6163 Set_Ident_String (Current_Sem_Unit, Str);
6166 -- For subunits, we just ignore the Ident, since in GNAT
6167 -- these are not separate object files, and hence not
6168 -- separate units in the unit table.
6170 elsif Nkind (GP) = N_Subunit then
6173 -- Otherwise we have a misplaced pragma Ident, but we ignore
6174 -- this if we are in an instantiation, since it comes from
6175 -- a generic, and has no relevance to the instantiation.
6177 elsif Prag_Id = Pragma_Ident then
6178 if Instantiation_Location (Loc) = No_Location then
6179 Error_Pragma ("pragma% only allowed at outer level");
6190 -- [ Convention =>] convention_IDENTIFIER,
6191 -- [ Entity =>] local_NAME
6192 -- [, [External_Name =>] static_string_EXPRESSION ]
6193 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6195 when Pragma_Import =>
6196 Check_Ada_83_Warning;
6197 Check_At_Least_N_Arguments (2);
6198 Check_At_Most_N_Arguments (4);
6199 Process_Import_Or_Interface;
6201 ----------------------
6202 -- Import_Exception --
6203 ----------------------
6205 -- pragma Import_Exception (
6206 -- [Internal =>] LOCAL_NAME,
6207 -- [, [External =>] EXTERNAL_SYMBOL,]
6208 -- [, [Form =>] Ada | VMS]
6209 -- [, [Code =>] static_integer_EXPRESSION]);
6211 when Pragma_Import_Exception => Import_Exception : declare
6212 Args : Args_List (1 .. 4);
6213 Names : constant Name_List (1 .. 4) := (
6219 Internal : Node_Id renames Args (1);
6220 External : Node_Id renames Args (2);
6221 Form : Node_Id renames Args (3);
6222 Code : Node_Id renames Args (4);
6225 Gather_Associations (Names, Args);
6227 if Present (External) and then Present (Code) then
6229 ("cannot give both External and Code options for pragma%");
6232 Process_Extended_Import_Export_Exception_Pragma (
6233 Arg_Internal => Internal,
6234 Arg_External => External,
6238 if not Is_VMS_Exception (Entity (Internal)) then
6239 Set_Imported (Entity (Internal));
6241 end Import_Exception;
6243 ---------------------
6244 -- Import_Function --
6245 ---------------------
6247 -- pragma Import_Function (
6248 -- [Internal =>] LOCAL_NAME,
6249 -- [, [External =>] EXTERNAL_SYMBOL]
6250 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6251 -- [, [Result_Type =>] SUBTYPE_MARK]
6252 -- [, [Mechanism =>] MECHANISM]
6253 -- [, [Result_Mechanism =>] MECHANISM_NAME]
6254 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6256 -- EXTERNAL_SYMBOL ::=
6258 -- | static_string_EXPRESSION
6260 -- PARAMETER_TYPES ::=
6262 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6264 -- TYPE_DESIGNATOR ::=
6266 -- | subtype_Name ' Access
6270 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6272 -- MECHANISM_ASSOCIATION ::=
6273 -- [formal_parameter_NAME =>] MECHANISM_NAME
6275 -- MECHANISM_NAME ::=
6278 -- | Descriptor [([Class =>] CLASS_NAME)]
6280 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6282 when Pragma_Import_Function => Import_Function : declare
6283 Args : Args_List (1 .. 7);
6284 Names : constant Name_List (1 .. 7) := (
6287 Name_Parameter_Types,
6290 Name_Result_Mechanism,
6291 Name_First_Optional_Parameter);
6293 Internal : Node_Id renames Args (1);
6294 External : Node_Id renames Args (2);
6295 Parameter_Types : Node_Id renames Args (3);
6296 Result_Type : Node_Id renames Args (4);
6297 Mechanism : Node_Id renames Args (5);
6298 Result_Mechanism : Node_Id renames Args (6);
6299 First_Optional_Parameter : Node_Id renames Args (7);
6303 Gather_Associations (Names, Args);
6304 Process_Extended_Import_Export_Subprogram_Pragma (
6305 Arg_Internal => Internal,
6306 Arg_External => External,
6307 Arg_Parameter_Types => Parameter_Types,
6308 Arg_Result_Type => Result_Type,
6309 Arg_Mechanism => Mechanism,
6310 Arg_Result_Mechanism => Result_Mechanism,
6311 Arg_First_Optional_Parameter => First_Optional_Parameter);
6312 end Import_Function;
6318 -- pragma Import_Object (
6319 -- [Internal =>] LOCAL_NAME,
6320 -- [, [External =>] EXTERNAL_SYMBOL]
6321 -- [, [Size =>] EXTERNAL_SYMBOL]);
6323 -- EXTERNAL_SYMBOL ::=
6325 -- | static_string_EXPRESSION
6327 when Pragma_Import_Object => Import_Object : declare
6328 Args : Args_List (1 .. 3);
6329 Names : constant Name_List (1 .. 3) := (
6334 Internal : Node_Id renames Args (1);
6335 External : Node_Id renames Args (2);
6336 Size : Node_Id renames Args (3);
6340 Gather_Associations (Names, Args);
6341 Process_Extended_Import_Export_Object_Pragma (
6342 Arg_Internal => Internal,
6343 Arg_External => External,
6347 ----------------------
6348 -- Import_Procedure --
6349 ----------------------
6351 -- pragma Import_Procedure (
6352 -- [Internal =>] LOCAL_NAME,
6353 -- [, [External =>] EXTERNAL_SYMBOL]
6354 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6355 -- [, [Mechanism =>] MECHANISM]
6356 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6358 -- EXTERNAL_SYMBOL ::=
6360 -- | static_string_EXPRESSION
6362 -- PARAMETER_TYPES ::=
6364 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6366 -- TYPE_DESIGNATOR ::=
6368 -- | subtype_Name ' Access
6372 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6374 -- MECHANISM_ASSOCIATION ::=
6375 -- [formal_parameter_NAME =>] MECHANISM_NAME
6377 -- MECHANISM_NAME ::=
6380 -- | Descriptor [([Class =>] CLASS_NAME)]
6382 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6384 when Pragma_Import_Procedure => Import_Procedure : declare
6385 Args : Args_List (1 .. 5);
6386 Names : constant Name_List (1 .. 5) := (
6389 Name_Parameter_Types,
6391 Name_First_Optional_Parameter);
6393 Internal : Node_Id renames Args (1);
6394 External : Node_Id renames Args (2);
6395 Parameter_Types : Node_Id renames Args (3);
6396 Mechanism : Node_Id renames Args (4);
6397 First_Optional_Parameter : Node_Id renames Args (5);
6401 Gather_Associations (Names, Args);
6402 Process_Extended_Import_Export_Subprogram_Pragma (
6403 Arg_Internal => Internal,
6404 Arg_External => External,
6405 Arg_Parameter_Types => Parameter_Types,
6406 Arg_Mechanism => Mechanism,
6407 Arg_First_Optional_Parameter => First_Optional_Parameter);
6408 end Import_Procedure;
6410 -----------------------------
6411 -- Import_Valued_Procedure --
6412 -----------------------------
6414 -- pragma Import_Valued_Procedure (
6415 -- [Internal =>] LOCAL_NAME,
6416 -- [, [External =>] EXTERNAL_SYMBOL]
6417 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6418 -- [, [Mechanism =>] MECHANISM]
6419 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6421 -- EXTERNAL_SYMBOL ::=
6423 -- | static_string_EXPRESSION
6425 -- PARAMETER_TYPES ::=
6427 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6429 -- TYPE_DESIGNATOR ::=
6431 -- | subtype_Name ' Access
6435 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6437 -- MECHANISM_ASSOCIATION ::=
6438 -- [formal_parameter_NAME =>] MECHANISM_NAME
6440 -- MECHANISM_NAME ::=
6443 -- | Descriptor [([Class =>] CLASS_NAME)]
6445 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6447 when Pragma_Import_Valued_Procedure =>
6448 Import_Valued_Procedure : declare
6449 Args : Args_List (1 .. 5);
6450 Names : constant Name_List (1 .. 5) := (
6453 Name_Parameter_Types,
6455 Name_First_Optional_Parameter);
6457 Internal : Node_Id renames Args (1);
6458 External : Node_Id renames Args (2);
6459 Parameter_Types : Node_Id renames Args (3);
6460 Mechanism : Node_Id renames Args (4);
6461 First_Optional_Parameter : Node_Id renames Args (5);
6465 Gather_Associations (Names, Args);
6466 Process_Extended_Import_Export_Subprogram_Pragma (
6467 Arg_Internal => Internal,
6468 Arg_External => External,
6469 Arg_Parameter_Types => Parameter_Types,
6470 Arg_Mechanism => Mechanism,
6471 Arg_First_Optional_Parameter => First_Optional_Parameter);
6472 end Import_Valued_Procedure;
6474 ------------------------
6475 -- Initialize_Scalars --
6476 ------------------------
6478 -- pragma Initialize_Scalars;
6480 when Pragma_Initialize_Scalars =>
6482 Check_Arg_Count (0);
6483 Check_Valid_Configuration_Pragma;
6484 Check_Restriction (No_Initialize_Scalars, N);
6486 if not Restriction_Active (No_Initialize_Scalars) then
6487 Init_Or_Norm_Scalars := True;
6488 Initialize_Scalars := True;
6495 -- pragma Inline ( NAME {, NAME} );
6497 when Pragma_Inline =>
6499 -- Pragma is active if inlining option is active
6501 if Inline_Active then
6502 Process_Inline (True);
6504 -- Pragma is active in a predefined file in config run time mode
6506 elsif Configurable_Run_Time_Mode
6508 Is_Predefined_File_Name (Unit_File_Name (Current_Sem_Unit))
6510 Process_Inline (True);
6512 -- Otherwise inlining is not active
6515 Process_Inline (False);
6522 -- pragma Inline_Always ( NAME {, NAME} );
6524 when Pragma_Inline_Always =>
6525 Process_Inline (True);
6527 --------------------
6528 -- Inline_Generic --
6529 --------------------
6531 -- pragma Inline_Generic (NAME {, NAME});
6533 when Pragma_Inline_Generic =>
6534 Process_Generic_List;
6536 ----------------------
6537 -- Inspection_Point --
6538 ----------------------
6540 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
6542 when Pragma_Inspection_Point => Inspection_Point : declare
6547 if Arg_Count > 0 then
6550 Exp := Expression (Arg);
6553 if not Is_Entity_Name (Exp)
6554 or else not Is_Object (Entity (Exp))
6556 Error_Pragma_Arg ("object name required", Arg);
6563 end Inspection_Point;
6569 -- pragma Interface (
6570 -- convention_IDENTIFIER,
6573 when Pragma_Interface =>
6575 Check_Arg_Count (2);
6576 Check_No_Identifiers;
6577 Process_Import_Or_Interface;
6579 --------------------
6580 -- Interface_Name --
6581 --------------------
6583 -- pragma Interface_Name (
6584 -- [ Entity =>] local_NAME
6585 -- [,[External_Name =>] static_string_EXPRESSION ]
6586 -- [,[Link_Name =>] static_string_EXPRESSION ]);
6588 when Pragma_Interface_Name => Interface_Name : declare
6596 Check_At_Least_N_Arguments (2);
6597 Check_At_Most_N_Arguments (3);
6598 Id := Expression (Arg1);
6601 if not Is_Entity_Name (Id) then
6603 ("first argument for pragma% must be entity name", Arg1);
6604 elsif Etype (Id) = Any_Type then
6607 Def_Id := Entity (Id);
6610 -- Special DEC-compatible processing for the object case,
6611 -- forces object to be imported.
6613 if Ekind (Def_Id) = E_Variable then
6614 Kill_Size_Check_Code (Def_Id);
6615 Note_Possible_Modification (Id);
6617 -- Initialization is not allowed for imported variable
6619 if Present (Expression (Parent (Def_Id)))
6620 and then Comes_From_Source (Expression (Parent (Def_Id)))
6622 Error_Msg_Sloc := Sloc (Def_Id);
6624 ("no initialization allowed for declaration of& #",
6628 -- For compatibility, support VADS usage of providing both
6629 -- pragmas Interface and Interface_Name to obtain the effect
6630 -- of a single Import pragma.
6632 if Is_Imported (Def_Id)
6633 and then Present (First_Rep_Item (Def_Id))
6634 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
6635 and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
6639 Set_Imported (Def_Id);
6642 Set_Is_Public (Def_Id);
6643 Process_Interface_Name (Def_Id, Arg2, Arg3);
6646 -- Otherwise must be subprogram
6648 elsif not Is_Subprogram (Def_Id) then
6650 ("argument of pragma% is not subprogram", Arg1);
6653 Check_At_Most_N_Arguments (3);
6657 -- Loop through homonyms
6660 Def_Id := Get_Base_Subprogram (Hom_Id);
6662 if Is_Imported (Def_Id) then
6663 Process_Interface_Name (Def_Id, Arg2, Arg3);
6667 Hom_Id := Homonym (Hom_Id);
6669 exit when No (Hom_Id)
6670 or else Scope (Hom_Id) /= Current_Scope;
6675 ("argument of pragma% is not imported subprogram",
6681 -----------------------
6682 -- Interrupt_Handler --
6683 -----------------------
6685 -- pragma Interrupt_Handler (handler_NAME);
6687 when Pragma_Interrupt_Handler =>
6688 Check_Ada_83_Warning;
6689 Check_Arg_Count (1);
6690 Check_No_Identifiers;
6692 if No_Run_Time_Mode then
6693 Error_Msg_CRT ("Interrupt_Handler pragma", N);
6695 Check_Interrupt_Or_Attach_Handler;
6696 Process_Interrupt_Or_Attach_Handler;
6699 ------------------------
6700 -- Interrupt_Priority --
6701 ------------------------
6703 -- pragma Interrupt_Priority [(EXPRESSION)];
6705 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
6706 P : constant Node_Id := Parent (N);
6710 Check_Ada_83_Warning;
6712 if Arg_Count /= 0 then
6713 Arg := Expression (Arg1);
6714 Check_Arg_Count (1);
6715 Check_No_Identifiers;
6717 -- The expression must be analyzed in the special manner
6718 -- described in "Handling of Default and Per-Object
6719 -- Expressions" in sem.ads.
6721 Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
6724 if Nkind (P) /= N_Task_Definition
6725 and then Nkind (P) /= N_Protected_Definition
6730 elsif Has_Priority_Pragma (P) then
6731 Error_Pragma ("duplicate pragma% not allowed");
6734 Set_Has_Priority_Pragma (P, True);
6735 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
6737 end Interrupt_Priority;
6739 ---------------------
6740 -- Interrupt_State --
6741 ---------------------
6743 -- pragma Interrupt_State (
6744 -- [Name =>] INTERRUPT_ID,
6745 -- [State =>] INTERRUPT_STATE);
6747 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
6748 -- INTERRUPT_STATE => System | Runtime | User
6750 -- Note: if the interrupt id is given as an identifier, then
6751 -- it must be one of the identifiers in Ada.Interrupts.Names.
6752 -- Otherwise it is given as a static integer expression which
6753 -- must be in the range of Ada.Interrupts.Interrupt_ID.
6755 when Pragma_Interrupt_State => Interrupt_State : declare
6757 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
6758 -- This is the entity Ada.Interrupts.Interrupt_ID;
6760 State_Type : Character;
6761 -- Set to 's'/'r'/'u' for System/Runtime/User
6764 -- Index to entry in Interrupt_States table
6767 -- Value of interrupt
6769 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
6770 -- The first argument to the pragma
6772 Int_Ent : Entity_Id;
6773 -- Interrupt entity in Ada.Interrupts.Names
6777 Check_Arg_Count (2);
6779 Check_Optional_Identifier (Arg1, Name_Name);
6780 Check_Optional_Identifier (Arg2, "state");
6781 Check_Arg_Is_Identifier (Arg2);
6783 -- First argument is identifier
6785 if Nkind (Arg1X) = N_Identifier then
6787 -- Search list of names in Ada.Interrupts.Names
6789 Int_Ent := First_Entity (RTE (RE_Names));
6791 if No (Int_Ent) then
6792 Error_Pragma_Arg ("invalid interrupt name", Arg1);
6794 elsif Chars (Int_Ent) = Chars (Arg1X) then
6795 Int_Val := Expr_Value (Constant_Value (Int_Ent));
6799 Next_Entity (Int_Ent);
6802 -- First argument is not an identifier, so it must be a
6803 -- static expression of type Ada.Interrupts.Interrupt_ID.
6806 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6807 Int_Val := Expr_Value (Arg1X);
6809 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
6811 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
6814 ("value not in range of type " &
6815 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
6821 case Chars (Get_Pragma_Arg (Arg2)) is
6822 when Name_Runtime => State_Type := 'r';
6823 when Name_System => State_Type := 's';
6824 when Name_User => State_Type := 'u';
6827 Error_Pragma_Arg ("invalid interrupt state", Arg2);
6830 -- Check if entry is already stored
6832 IST_Num := Interrupt_States.First;
6834 -- If entry not found, add it
6836 if IST_Num > Interrupt_States.Last then
6837 Interrupt_States.Append
6838 ((Interrupt_Number => UI_To_Int (Int_Val),
6839 Interrupt_State => State_Type,
6840 Pragma_Loc => Loc));
6843 -- Case of entry for the same entry
6845 elsif Int_Val = Interrupt_States.Table (IST_Num).
6848 -- If state matches, done, no need to make redundant entry
6851 State_Type = Interrupt_States.Table (IST_Num).
6854 -- Otherwise if state does not match, error
6857 Interrupt_States.Table (IST_Num).Pragma_Loc;
6859 ("state conflicts with that given at #", Arg2);
6863 IST_Num := IST_Num + 1;
6865 end Interrupt_State;
6867 ----------------------
6868 -- Java_Constructor --
6869 ----------------------
6871 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
6873 when Pragma_Java_Constructor => Java_Constructor : declare
6880 Check_Arg_Count (1);
6881 Check_Optional_Identifier (Arg1, Name_Entity);
6882 Check_Arg_Is_Local_Name (Arg1);
6884 Id := Expression (Arg1);
6885 Find_Program_Unit_Name (Id);
6887 -- If we did not find the name, we are done
6889 if Etype (Id) = Any_Type then
6893 Hom_Id := Entity (Id);
6895 -- Loop through homonyms
6898 Def_Id := Get_Base_Subprogram (Hom_Id);
6900 -- The constructor is required to be a function returning
6901 -- an access type whose designated type has convention Java.
6903 if Ekind (Def_Id) = E_Function
6904 and then Ekind (Etype (Def_Id)) in Access_Kind
6907 (Designated_Type (Etype (Def_Id))) = Convention_Java
6910 (Root_Type (Designated_Type (Etype (Def_Id))))
6913 Set_Is_Constructor (Def_Id);
6914 Set_Convention (Def_Id, Convention_Java);
6918 ("pragma% requires function returning a 'Java access type",
6922 Hom_Id := Homonym (Hom_Id);
6924 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
6926 end Java_Constructor;
6928 ----------------------
6929 -- Java_Interface --
6930 ----------------------
6932 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
6934 when Pragma_Java_Interface => Java_Interface : declare
6940 Check_Arg_Count (1);
6941 Check_Optional_Identifier (Arg1, Name_Entity);
6942 Check_Arg_Is_Local_Name (Arg1);
6944 Arg := Expression (Arg1);
6947 if Etype (Arg) = Any_Type then
6951 if not Is_Entity_Name (Arg)
6952 or else not Is_Type (Entity (Arg))
6954 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6957 Typ := Underlying_Type (Entity (Arg));
6959 -- For now we simply check some of the semantic constraints
6960 -- on the type. This currently leaves out some restrictions
6961 -- on interface types, namely that the parent type must be
6962 -- java.lang.Object.Typ and that all primitives of the type
6963 -- should be declared abstract. ???
6965 if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
6966 Error_Pragma_Arg ("pragma% requires an abstract "
6967 & "tagged type", Arg1);
6969 elsif not Has_Discriminants (Typ)
6970 or else Ekind (Etype (First_Discriminant (Typ)))
6971 /= E_Anonymous_Access_Type
6973 not Is_Class_Wide_Type
6974 (Designated_Type (Etype (First_Discriminant (Typ))))
6977 ("type must have a class-wide access discriminant", Arg1);
6985 -- pragma Keep_Names ([On => ] local_NAME);
6987 when Pragma_Keep_Names => Keep_Names : declare
6992 Check_Arg_Count (1);
6993 Check_Optional_Identifier (Arg1, Name_On);
6994 Check_Arg_Is_Local_Name (Arg1);
6996 Arg := Expression (Arg1);
6999 if Etype (Arg) = Any_Type then
7003 if not Is_Entity_Name (Arg)
7004 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
7007 ("pragma% requires a local enumeration type", Arg1);
7010 Set_Discard_Names (Entity (Arg), False);
7017 -- pragma License (RESTRICTED | UNRESRICTED | GPL | MODIFIED_GPL);
7019 when Pragma_License =>
7021 Check_Arg_Count (1);
7022 Check_No_Identifiers;
7023 Check_Valid_Configuration_Pragma;
7024 Check_Arg_Is_Identifier (Arg1);
7027 Sind : constant Source_File_Index :=
7028 Source_Index (Current_Sem_Unit);
7031 case Chars (Get_Pragma_Arg (Arg1)) is
7033 Set_License (Sind, GPL);
7035 when Name_Modified_GPL =>
7036 Set_License (Sind, Modified_GPL);
7038 when Name_Restricted =>
7039 Set_License (Sind, Restricted);
7041 when Name_Unrestricted =>
7042 Set_License (Sind, Unrestricted);
7045 Error_Pragma_Arg ("invalid license name", Arg1);
7053 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
7055 when Pragma_Link_With => Link_With : declare
7061 if Operating_Mode = Generate_Code
7062 and then In_Extended_Main_Source_Unit (N)
7064 Check_At_Least_N_Arguments (1);
7065 Check_No_Identifiers;
7066 Check_Is_In_Decl_Part_Or_Package_Spec;
7067 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7071 while Present (Arg) loop
7072 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7074 -- Store argument, converting sequences of spaces
7075 -- to a single null character (this is one of the
7076 -- differences in processing between Link_With
7077 -- and Linker_Options).
7080 C : constant Char_Code := Get_Char_Code (' ');
7081 S : constant String_Id :=
7082 Strval (Expr_Value_S (Expression (Arg)));
7083 L : constant Nat := String_Length (S);
7086 procedure Skip_Spaces;
7087 -- Advance F past any spaces
7089 procedure Skip_Spaces is
7091 while F <= L and then Get_String_Char (S, F) = C loop
7097 Skip_Spaces; -- skip leading spaces
7099 -- Loop through characters, changing any embedded
7100 -- sequence of spaces to a single null character
7101 -- (this is how Link_With/Linker_Options differ)
7104 if Get_String_Char (S, F) = C then
7107 Store_String_Char (ASCII.NUL);
7110 Store_String_Char (Get_String_Char (S, F));
7118 if Present (Arg) then
7119 Store_String_Char (ASCII.NUL);
7123 Store_Linker_Option_String (End_String);
7131 -- pragma Linker_Alias (
7132 -- [Entity =>] LOCAL_NAME
7133 -- [Alias =>] static_string_EXPRESSION);
7135 when Pragma_Linker_Alias =>
7137 Check_Arg_Count (2);
7138 Check_Optional_Identifier (Arg1, Name_Entity);
7139 Check_Optional_Identifier (Arg2, "alias");
7140 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7141 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7143 -- The only processing required is to link this item on to the
7144 -- list of rep items for the given entity. This is accomplished
7145 -- by the call to Rep_Item_Too_Late (when no error is detected
7146 -- and False is returned).
7148 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7151 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7154 --------------------
7155 -- Linker_Options --
7156 --------------------
7158 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
7160 when Pragma_Linker_Options => Linker_Options : declare
7164 Check_Ada_83_Warning;
7165 Check_No_Identifiers;
7166 Check_Arg_Count (1);
7167 Check_Is_In_Decl_Part_Or_Package_Spec;
7169 if Operating_Mode = Generate_Code
7170 and then In_Extended_Main_Source_Unit (N)
7172 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7173 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
7176 while Present (Arg) loop
7177 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7178 Store_String_Char (ASCII.NUL);
7180 (Strval (Expr_Value_S (Expression (Arg))));
7184 Store_Linker_Option_String (End_String);
7188 --------------------
7189 -- Linker_Section --
7190 --------------------
7192 -- pragma Linker_Section (
7193 -- [Entity =>] LOCAL_NAME
7194 -- [Section =>] static_string_EXPRESSION);
7196 when Pragma_Linker_Section =>
7198 Check_Arg_Count (2);
7199 Check_Optional_Identifier (Arg1, Name_Entity);
7200 Check_Optional_Identifier (Arg2, Name_Section);
7201 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7202 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7204 -- The only processing required is to link this item on to the
7205 -- list of rep items for the given entity. This is accomplished
7206 -- by the call to Rep_Item_Too_Late (when no error is detected
7207 -- and False is returned).
7209 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7212 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7219 -- pragma List (On | Off)
7221 -- There is nothing to do here, since we did all the processing
7222 -- for this pragma in Par.Prag (so that it works properly even in
7223 -- syntax only mode)
7228 --------------------
7229 -- Locking_Policy --
7230 --------------------
7232 -- pragma Locking_Policy (policy_IDENTIFIER);
7234 when Pragma_Locking_Policy => declare
7238 Check_Ada_83_Warning;
7239 Check_Arg_Count (1);
7240 Check_No_Identifiers;
7241 Check_Arg_Is_Locking_Policy (Arg1);
7242 Check_Valid_Configuration_Pragma;
7243 Get_Name_String (Chars (Expression (Arg1)));
7244 LP := Fold_Upper (Name_Buffer (1));
7246 if Locking_Policy /= ' '
7247 and then Locking_Policy /= LP
7249 Error_Msg_Sloc := Locking_Policy_Sloc;
7250 Error_Pragma ("locking policy incompatible with policy#");
7252 -- Set new policy, but always preserve System_Location since
7253 -- we like the error message with the run time name.
7256 Locking_Policy := LP;
7258 if Locking_Policy_Sloc /= System_Location then
7259 Locking_Policy_Sloc := Loc;
7268 -- pragma Long_Float (D_Float | G_Float);
7270 when Pragma_Long_Float =>
7272 Check_Valid_Configuration_Pragma;
7273 Check_Arg_Count (1);
7274 Check_No_Identifier (Arg1);
7275 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
7277 if not OpenVMS_On_Target then
7278 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
7283 if Chars (Expression (Arg1)) = Name_D_Float then
7284 if Opt.Float_Format_Long = 'G' then
7285 Error_Pragma ("G_Float previously specified");
7288 Opt.Float_Format_Long := 'D';
7290 -- G_Float case (this is the default, does not need overriding)
7293 if Opt.Float_Format_Long = 'D' then
7294 Error_Pragma ("D_Float previously specified");
7297 Opt.Float_Format_Long := 'G';
7300 Set_Standard_Fpt_Formats;
7302 -----------------------
7303 -- Machine_Attribute --
7304 -----------------------
7306 -- pragma Machine_Attribute (
7307 -- [Entity =>] LOCAL_NAME,
7308 -- [Attribute_Name =>] static_string_EXPRESSION
7309 -- [,[Info =>] static_string_EXPRESSION] );
7311 when Pragma_Machine_Attribute => Machine_Attribute : declare
7317 if Arg_Count = 3 then
7318 Check_Optional_Identifier (Arg3, "info");
7319 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
7321 Check_Arg_Count (2);
7324 Check_Arg_Is_Local_Name (Arg1);
7325 Check_Optional_Identifier (Arg2, "attribute_name");
7326 Check_Optional_Identifier (Arg1, Name_Entity);
7327 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7328 Def_Id := Entity (Expression (Arg1));
7330 if Is_Access_Type (Def_Id) then
7331 Def_Id := Designated_Type (Def_Id);
7334 if Rep_Item_Too_Early (Def_Id, N) then
7338 Def_Id := Underlying_Type (Def_Id);
7340 -- The only processing required is to link this item on to the
7341 -- list of rep items for the given entity. This is accomplished
7342 -- by the call to Rep_Item_Too_Late (when no error is detected
7343 -- and False is returned).
7345 if Rep_Item_Too_Late (Def_Id, N) then
7348 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7350 end Machine_Attribute;
7356 -- pragma Main_Storage
7357 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7359 -- MAIN_STORAGE_OPTION ::=
7360 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7361 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7363 when Pragma_Main => Main : declare
7364 Args : Args_List (1 .. 3);
7365 Names : constant Name_List (1 .. 3) := (
7367 Name_Task_Stack_Size_Default,
7368 Name_Time_Slicing_Enabled);
7374 Gather_Associations (Names, Args);
7376 for J in 1 .. 2 loop
7377 if Present (Args (J)) then
7378 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7382 if Present (Args (3)) then
7383 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
7387 while Present (Nod) loop
7388 if Nkind (Nod) = N_Pragma
7389 and then Chars (Nod) = Name_Main
7391 Error_Msg_Name_1 := Chars (N);
7392 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7403 -- pragma Main_Storage
7404 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7406 -- MAIN_STORAGE_OPTION ::=
7407 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7408 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7410 when Pragma_Main_Storage => Main_Storage : declare
7411 Args : Args_List (1 .. 2);
7412 Names : constant Name_List (1 .. 2) := (
7413 Name_Working_Storage,
7420 Gather_Associations (Names, Args);
7422 for J in 1 .. 2 loop
7423 if Present (Args (J)) then
7424 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7428 Check_In_Main_Program;
7431 while Present (Nod) loop
7432 if Nkind (Nod) = N_Pragma
7433 and then Chars (Nod) = Name_Main_Storage
7435 Error_Msg_Name_1 := Chars (N);
7436 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7447 -- pragma Memory_Size (NUMERIC_LITERAL)
7449 when Pragma_Memory_Size =>
7452 -- Memory size is simply ignored
7454 Check_No_Identifiers;
7455 Check_Arg_Count (1);
7456 Check_Arg_Is_Integer_Literal (Arg1);
7462 -- pragma No_Return (procedure_LOCAL_NAME);
7464 when Pragma_No_Return => No_Return : declare
7471 Check_Arg_Count (1);
7472 Check_No_Identifiers;
7473 Check_Arg_Is_Local_Name (Arg1);
7474 Id := Expression (Arg1);
7477 if not Is_Entity_Name (Id) then
7478 Error_Pragma_Arg ("entity name required", Arg1);
7481 if Etype (Id) = Any_Type then
7489 and then Scope (E) = Current_Scope
7491 if Ekind (E) = E_Procedure
7492 or else Ekind (E) = E_Generic_Procedure
7502 Error_Pragma ("no procedures found for pragma%");
7506 ------------------------
7507 -- No_Strict_Aliasing --
7508 ------------------------
7510 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
7515 Check_At_Most_N_Arguments (1);
7517 if Arg_Count = 0 then
7518 Check_Valid_Configuration_Pragma;
7519 Opt.No_Strict_Aliasing := True;
7522 Check_Optional_Identifier (Arg2, Name_Entity);
7523 Check_Arg_Is_Local_Name (Arg1);
7524 E_Id := Entity (Expression (Arg1));
7526 if E_Id = Any_Type then
7528 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
7529 Error_Pragma_Arg ("pragma% requires access type", Arg1);
7532 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
7534 end No_Strict_Alias;
7540 -- pragma Obsolescent [(static_string_EXPRESSION)];
7542 when Pragma_Obsolescent => Obsolescent : declare
7545 Check_At_Most_N_Arguments (1);
7546 Check_No_Identifiers;
7548 if Arg_Count = 1 then
7549 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7553 or else (Nkind (Prev (N))) /= N_Subprogram_Declaration
7556 ("pragma% misplaced, must immediately " &
7557 "follow subprogram spec");
7565 -- pragma No_Run_Time
7567 -- Note: this pragma is retained for backwards compatibiltiy.
7568 -- See body of Rtsfind for full details on its handling.
7570 when Pragma_No_Run_Time =>
7572 Check_Valid_Configuration_Pragma;
7573 Check_Arg_Count (0);
7575 No_Run_Time_Mode := True;
7576 Configurable_Run_Time_Mode := True;
7579 Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
7582 Duration_32_Bits_On_Target := True;
7586 Set_Restriction (No_Finalization, N);
7587 Set_Restriction (No_Exception_Handlers, N);
7588 Set_Restriction (Max_Tasks, N, 0);
7589 Set_Restriction (No_Tasking, N);
7591 -----------------------
7592 -- Normalize_Scalars --
7593 -----------------------
7595 -- pragma Normalize_Scalars;
7597 when Pragma_Normalize_Scalars =>
7598 Check_Ada_83_Warning;
7599 Check_Arg_Count (0);
7600 Check_Valid_Configuration_Pragma;
7601 Normalize_Scalars := True;
7602 Init_Or_Norm_Scalars := True;
7608 -- pragma Optimize (Time | Space);
7610 -- The actual check for optimize is done in Gigi. Note that this
7611 -- pragma does not actually change the optimization setting, it
7612 -- simply checks that it is consistent with the pragma.
7614 when Pragma_Optimize =>
7615 Check_No_Identifiers;
7616 Check_Arg_Count (1);
7617 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
7619 -------------------------
7620 -- Optional_Overriding --
7621 -------------------------
7623 -- These pragmas are treated as part of the previous subprogram
7624 -- declaration, and analyzed immediately after it (see sem_ch6,
7625 -- Check_Overriding_Operation). If the pragma has not been analyzed
7626 -- yet, it appears in the wrong place.
7628 when Pragma_Optional_Overriding =>
7629 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7635 when Pragma_Overriding =>
7636 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7642 -- pragma Pack (first_subtype_LOCAL_NAME);
7644 when Pragma_Pack => Pack : declare
7645 Assoc : constant Node_Id := Arg1;
7650 Check_No_Identifiers;
7651 Check_Arg_Count (1);
7652 Check_Arg_Is_Local_Name (Arg1);
7654 Type_Id := Expression (Assoc);
7655 Find_Type (Type_Id);
7656 Typ := Entity (Type_Id);
7659 or else Rep_Item_Too_Early (Typ, N)
7663 Typ := Underlying_Type (Typ);
7666 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
7667 Error_Pragma ("pragma% must specify array or record type");
7670 Check_First_Subtype (Arg1);
7672 if Has_Pragma_Pack (Typ) then
7673 Error_Pragma ("duplicate pragma%, only one allowed");
7675 -- Array type. We set the Has_Pragma_Pack flag, and Is_Packed,
7676 -- but not Has_Non_Standard_Rep, because we don't actually know
7677 -- till freeze time if the array can have packed representation.
7678 -- That's because in the general case we do not know enough about
7679 -- the component type until it in turn is frozen, which certainly
7680 -- happens before the array type is frozen, but not necessarily
7681 -- till that point (i.e. right now it may be unfrozen).
7683 elsif Is_Array_Type (Typ) then
7684 if Has_Aliased_Components (Base_Type (Typ)) then
7686 ("pragma% ignored, cannot pack aliased components?");
7688 elsif Has_Atomic_Components (Typ)
7689 or else Is_Atomic (Component_Type (Typ))
7692 ("?pragma% ignored, cannot pack atomic components");
7694 elsif not Rep_Item_Too_Late (Typ, N) then
7695 Set_Is_Packed (Base_Type (Typ));
7696 Set_Has_Pragma_Pack (Base_Type (Typ));
7697 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7700 -- Record type. For record types, the pack is always effective
7702 else pragma Assert (Is_Record_Type (Typ));
7703 if not Rep_Item_Too_Late (Typ, N) then
7704 Set_Has_Pragma_Pack (Base_Type (Typ));
7705 Set_Is_Packed (Base_Type (Typ));
7706 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7717 -- There is nothing to do here, since we did all the processing
7718 -- for this pragma in Par.Prag (so that it works properly even in
7719 -- syntax only mode)
7728 -- pragma Passive [(PASSIVE_FORM)];
7730 -- PASSIVE_FORM ::= Semaphore | No
7732 when Pragma_Passive =>
7735 if Nkind (Parent (N)) /= N_Task_Definition then
7736 Error_Pragma ("pragma% must be within task definition");
7739 if Arg_Count /= 0 then
7740 Check_Arg_Count (1);
7741 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
7748 -- pragma Polling (ON | OFF);
7750 when Pragma_Polling =>
7752 Check_Arg_Count (1);
7753 Check_No_Identifiers;
7754 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7755 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
7757 ---------------------
7758 -- Persistent_Data --
7759 ---------------------
7761 when Pragma_Persistent_Data => declare
7765 -- Register the pragma as applying to the compilation unit.
7766 -- Individual Persistent_Object pragmas for relevant objects
7767 -- are generated the end of the compilation.
7770 Check_Valid_Configuration_Pragma;
7771 Check_Arg_Count (0);
7772 Ent := Find_Lib_Unit_Name;
7773 Set_Is_Preelaborated (Ent);
7776 -----------------------
7777 -- Persistent_Object --
7778 -----------------------
7780 when Pragma_Persistent_Object => declare
7788 Check_Arg_Count (1);
7789 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7791 if not Is_Entity_Name (Expression (Arg1))
7793 (Ekind (Entity (Expression (Arg1))) /= E_Variable
7794 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
7796 Error_Pragma_Arg ("pragma only applies to objects", Arg1);
7799 Ent := Entity (Expression (Arg1));
7800 Decl := Parent (Ent);
7802 if Nkind (Decl) /= N_Object_Declaration then
7806 -- Placement of the object depends on whether there is
7807 -- an initial value or none. If the No_Initialization flag
7808 -- is set, the initialization has been transformed into
7809 -- assignments, which is disallowed elaboration code.
7811 if No_Initialization (Decl) then
7813 ("initialization for persistent object"
7814 & "must be static expression", Decl);
7818 if No (Expression (Decl)) then
7820 Store_String_Chars ("section ("".persistent.bss"")");
7824 if not Is_OK_Static_Expression (Expression (Decl)) then
7825 Flag_Non_Static_Expr
7826 ("initialization for persistent object"
7827 & "must be static expression!", Expression (Decl));
7832 Store_String_Chars ("section ("".persistent.data"")");
7839 Name_Machine_Attribute,
7841 (Make_Pragma_Argument_Association
7842 (Sloc => Sloc (Arg1),
7843 Expression => New_Occurrence_Of (Ent, Sloc (Ent))),
7844 Make_Pragma_Argument_Association
7845 (Sloc => Sloc (Arg1),
7848 (Sloc => Sloc (Arg1),
7851 Insert_After (N, MA);
7853 Set_Has_Gigi_Rep_Item (Ent);
7860 -- pragma Preelaborate [(library_unit_NAME)];
7862 -- Set the flag Is_Preelaborated of program unit name entity
7864 when Pragma_Preelaborate => Preelaborate : declare
7865 Pa : constant Node_Id := Parent (N);
7866 Pk : constant Node_Kind := Nkind (Pa);
7870 Check_Ada_83_Warning;
7871 Check_Valid_Library_Unit_Pragma;
7873 if Nkind (N) = N_Null_Statement then
7877 Ent := Find_Lib_Unit_Name;
7879 -- This filters out pragmas inside generic parent then
7880 -- show up inside instantiation
7883 and then not (Pk = N_Package_Specification
7884 and then Present (Generic_Parent (Pa)))
7886 if not Debug_Flag_U then
7887 Set_Is_Preelaborated (Ent);
7888 Set_Suppress_Elaboration_Warnings (Ent);
7897 -- pragma Priority (EXPRESSION);
7899 when Pragma_Priority => Priority : declare
7900 P : constant Node_Id := Parent (N);
7904 Check_No_Identifiers;
7905 Check_Arg_Count (1);
7909 if Nkind (P) = N_Subprogram_Body then
7910 Check_In_Main_Program;
7912 Arg := Expression (Arg1);
7913 Analyze_And_Resolve (Arg, Standard_Integer);
7917 if not Is_Static_Expression (Arg) then
7918 Flag_Non_Static_Expr
7919 ("main subprogram priority is not static!", Arg);
7922 -- If constraint error, then we already signalled an error
7924 elsif Raises_Constraint_Error (Arg) then
7927 -- Otherwise check in range
7931 Val : constant Uint := Expr_Value (Arg);
7935 or else Val > Expr_Value (Expression
7936 (Parent (RTE (RE_Max_Priority))))
7939 ("main subprogram priority is out of range", Arg1);
7945 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
7947 -- Task or Protected, must be of type Integer
7949 elsif Nkind (P) = N_Protected_Definition
7951 Nkind (P) = N_Task_Definition
7953 Arg := Expression (Arg1);
7955 -- The expression must be analyzed in the special manner
7956 -- described in "Handling of Default and Per-Object
7957 -- Expressions" in sem.ads.
7959 Analyze_Per_Use_Expression (Arg, Standard_Integer);
7961 if not Is_Static_Expression (Arg) then
7962 Check_Restriction (Static_Priorities, Arg);
7965 -- Anything else is incorrect
7971 if Has_Priority_Pragma (P) then
7972 Error_Pragma ("duplicate pragma% not allowed");
7974 Set_Has_Priority_Pragma (P, True);
7976 if Nkind (P) = N_Protected_Definition
7978 Nkind (P) = N_Task_Definition
7980 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7981 -- exp_ch9 should use this ???
7990 -- pragma Profile (profile_IDENTIFIER);
7992 -- profile_IDENTIFIER => Ravenscar
7994 when Pragma_Profile =>
7996 Check_Arg_Count (1);
7997 Check_Valid_Configuration_Pragma;
7998 Check_No_Identifiers;
8002 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
8004 if Chars (Argx) = Name_Ravenscar then
8007 Error_Pragma_Arg ("& is not a valid profile", Argx);
8011 --------------------------
8012 -- Propagate_Exceptions --
8013 --------------------------
8015 -- pragma Propagate_Exceptions;
8017 when Pragma_Propagate_Exceptions =>
8019 Check_Arg_Count (0);
8021 if In_Extended_Main_Source_Unit (N) then
8022 Propagate_Exceptions := True;
8029 -- pragma Psect_Object (
8030 -- [Internal =>] LOCAL_NAME,
8031 -- [, [External =>] EXTERNAL_SYMBOL]
8032 -- [, [Size =>] EXTERNAL_SYMBOL]);
8034 when Pragma_Psect_Object | Pragma_Common_Object =>
8035 Psect_Object : declare
8036 Args : Args_List (1 .. 3);
8037 Names : constant Name_List (1 .. 3) := (
8042 Internal : Node_Id renames Args (1);
8043 External : Node_Id renames Args (2);
8044 Size : Node_Id renames Args (3);
8046 R_Internal : Node_Id;
8047 R_External : Node_Id;
8054 procedure Check_Too_Long (Arg : Node_Id);
8055 -- Posts message if the argument is an identifier with more
8056 -- than 31 characters, or a string literal with more than
8057 -- 31 characters, and we are operating under VMS
8059 --------------------
8060 -- Check_Too_Long --
8061 --------------------
8063 procedure Check_Too_Long (Arg : Node_Id) is
8064 X : constant Node_Id := Original_Node (Arg);
8067 if Nkind (X) /= N_String_Literal
8069 Nkind (X) /= N_Identifier
8072 ("inappropriate argument for pragma %", Arg);
8075 if OpenVMS_On_Target then
8076 if (Nkind (X) = N_String_Literal
8077 and then String_Length (Strval (X)) > 31)
8079 (Nkind (X) = N_Identifier
8080 and then Length_Of_Name (Chars (X)) > 31)
8083 ("argument for pragma % is longer than 31 characters",
8089 -- Start of processing for Common_Object/Psect_Object
8093 Gather_Associations (Names, Args);
8094 Process_Extended_Import_Export_Internal_Arg (Internal);
8096 R_Internal := Relocate_Node (Internal);
8098 Def_Id := Entity (R_Internal);
8100 if Ekind (Def_Id) /= E_Constant
8101 and then Ekind (Def_Id) /= E_Variable
8104 ("pragma% must designate an object", Internal);
8107 Check_Too_Long (R_Internal);
8109 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
8111 ("cannot use pragma% for imported/exported object",
8115 if Is_Concurrent_Type (Etype (R_Internal)) then
8117 ("cannot specify pragma % for task/protected object",
8121 if Is_Psected (Def_Id) then
8122 Error_Msg_N ("?duplicate Psect_Object pragma", N);
8124 Set_Is_Psected (Def_Id);
8127 if Ekind (Def_Id) = E_Constant then
8129 ("cannot specify pragma % for a constant", R_Internal);
8132 if Is_Record_Type (Etype (R_Internal)) then
8138 Ent := First_Entity (Etype (R_Internal));
8139 while Present (Ent) loop
8140 Decl := Declaration_Node (Ent);
8142 if Ekind (Ent) = E_Component
8143 and then Nkind (Decl) = N_Component_Declaration
8144 and then Present (Expression (Decl))
8145 and then Warn_On_Export_Import
8148 ("?object for pragma % has defaults", R_Internal);
8158 if Present (Size) then
8159 Check_Too_Long (Size);
8162 -- Make Psect case-insensitive.
8164 if Present (External) then
8165 Check_Too_Long (External);
8167 if Nkind (External) = N_String_Literal then
8168 String_To_Name_Buffer (Strval (External));
8170 Get_Name_String (Chars (External));
8175 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8177 R_External := Make_String_Literal
8178 (Sloc => Sloc (External), Strval => Str);
8180 Get_Name_String (Chars (Internal));
8183 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8185 R_External := Make_String_Literal
8186 (Sloc => Sloc (Internal), Strval => Str);
8189 -- Transform into pragma Linker_Section, add attributes to
8190 -- match what DEC Ada does. Ignore size for now?
8195 Name_Linker_Section,
8197 (Make_Pragma_Argument_Association
8198 (Sloc => Sloc (R_Internal),
8199 Expression => R_Internal),
8200 Make_Pragma_Argument_Association
8201 (Sloc => Sloc (R_External),
8202 Expression => R_External))));
8206 -- Add Machine_Attribute of "overlaid", so the section overlays
8207 -- other sections of the same name.
8210 Store_String_Chars ("overlaid");
8216 Name_Machine_Attribute,
8218 (Make_Pragma_Argument_Association
8219 (Sloc => Sloc (R_Internal),
8220 Expression => R_Internal),
8221 Make_Pragma_Argument_Association
8222 (Sloc => Sloc (R_External),
8225 (Sloc => Sloc (R_External),
8229 -- Add Machine_Attribute of "global", so the section is visible
8233 Store_String_Chars ("global");
8239 Name_Machine_Attribute,
8241 (Make_Pragma_Argument_Association
8242 (Sloc => Sloc (R_Internal),
8243 Expression => R_Internal),
8245 Make_Pragma_Argument_Association
8246 (Sloc => Sloc (R_External),
8249 (Sloc => Sloc (R_External),
8253 -- Add Machine_Attribute of "initialize", so the section is
8257 Store_String_Chars ("initialize");
8263 Name_Machine_Attribute,
8265 (Make_Pragma_Argument_Association
8266 (Sloc => Sloc (R_Internal),
8267 Expression => R_Internal),
8269 Make_Pragma_Argument_Association
8270 (Sloc => Sloc (R_External),
8273 (Sloc => Sloc (R_External),
8282 -- pragma Pure [(library_unit_NAME)];
8284 when Pragma_Pure => Pure : declare
8287 Check_Ada_83_Warning;
8288 Check_Valid_Library_Unit_Pragma;
8290 if Nkind (N) = N_Null_Statement then
8294 Ent := Find_Lib_Unit_Name;
8296 Set_Suppress_Elaboration_Warnings (Ent);
8303 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
8305 when Pragma_Pure_Function => Pure_Function : declare
8309 Effective : Boolean := False;
8313 Check_Arg_Count (1);
8314 Check_Optional_Identifier (Arg1, Name_Entity);
8315 Check_Arg_Is_Local_Name (Arg1);
8316 E_Id := Expression (Arg1);
8318 if Error_Posted (E_Id) then
8322 -- Loop through homonyms (overloadings) of referenced entity
8328 Def_Id := Get_Base_Subprogram (E);
8330 if Ekind (Def_Id) /= E_Function
8331 and then Ekind (Def_Id) /= E_Generic_Function
8332 and then Ekind (Def_Id) /= E_Operator
8335 ("pragma% requires a function name", Arg1);
8338 Set_Is_Pure (Def_Id);
8340 if not Has_Pragma_Pure_Function (Def_Id) then
8341 Set_Has_Pragma_Pure_Function (Def_Id);
8346 exit when No (E) or else Scope (E) /= Current_Scope;
8350 and then Warn_On_Redundant_Constructs
8352 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
8358 --------------------
8359 -- Queuing_Policy --
8360 --------------------
8362 -- pragma Queuing_Policy (policy_IDENTIFIER);
8364 when Pragma_Queuing_Policy => declare
8368 Check_Ada_83_Warning;
8369 Check_Arg_Count (1);
8370 Check_No_Identifiers;
8371 Check_Arg_Is_Queuing_Policy (Arg1);
8372 Check_Valid_Configuration_Pragma;
8373 Get_Name_String (Chars (Expression (Arg1)));
8374 QP := Fold_Upper (Name_Buffer (1));
8376 if Queuing_Policy /= ' '
8377 and then Queuing_Policy /= QP
8379 Error_Msg_Sloc := Queuing_Policy_Sloc;
8380 Error_Pragma ("queuing policy incompatible with policy#");
8382 -- Set new policy, but always preserve System_Location since
8383 -- we like the error message with the run time name.
8386 Queuing_Policy := QP;
8388 if Queuing_Policy_Sloc /= System_Location then
8389 Queuing_Policy_Sloc := Loc;
8394 ---------------------------
8395 -- Remote_Call_Interface --
8396 ---------------------------
8398 -- pragma Remote_Call_Interface [(library_unit_NAME)];
8400 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
8401 Cunit_Node : Node_Id;
8402 Cunit_Ent : Entity_Id;
8406 Check_Ada_83_Warning;
8407 Check_Valid_Library_Unit_Pragma;
8409 if Nkind (N) = N_Null_Statement then
8413 Cunit_Node := Cunit (Current_Sem_Unit);
8414 K := Nkind (Unit (Cunit_Node));
8415 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8417 if K = N_Package_Declaration
8418 or else K = N_Generic_Package_Declaration
8419 or else K = N_Subprogram_Declaration
8420 or else K = N_Generic_Subprogram_Declaration
8421 or else (K = N_Subprogram_Body
8422 and then Acts_As_Spec (Unit (Cunit_Node)))
8427 "pragma% must apply to package or subprogram declaration");
8430 Set_Is_Remote_Call_Interface (Cunit_Ent);
8431 end Remote_Call_Interface;
8437 -- pragma Remote_Types [(library_unit_NAME)];
8439 when Pragma_Remote_Types => Remote_Types : declare
8440 Cunit_Node : Node_Id;
8441 Cunit_Ent : Entity_Id;
8444 Check_Ada_83_Warning;
8445 Check_Valid_Library_Unit_Pragma;
8447 if Nkind (N) = N_Null_Statement then
8451 Cunit_Node := Cunit (Current_Sem_Unit);
8452 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8454 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8456 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8459 "pragma% can only apply to a package declaration");
8462 Set_Is_Remote_Types (Cunit_Ent);
8469 -- pragma Ravenscar;
8471 when Pragma_Ravenscar =>
8473 Check_Arg_Count (0);
8474 Check_Valid_Configuration_Pragma;
8477 -------------------------
8478 -- Restricted_Run_Time --
8479 -------------------------
8481 -- pragma Restricted_Run_Time;
8483 when Pragma_Restricted_Run_Time =>
8485 Check_Arg_Count (0);
8486 Check_Valid_Configuration_Pragma;
8487 Set_Restricted_Profile (N);
8493 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
8496 -- restriction_IDENTIFIER
8497 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8499 when Pragma_Restrictions =>
8500 Process_Restrictions_Or_Restriction_Warnings;
8502 --------------------------
8503 -- Restriction_Warnings --
8504 --------------------------
8506 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
8509 -- restriction_IDENTIFIER
8510 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8512 when Pragma_Restriction_Warnings =>
8513 Process_Restrictions_Or_Restriction_Warnings;
8519 -- pragma Reviewable;
8521 when Pragma_Reviewable =>
8522 Check_Ada_83_Warning;
8523 Check_Arg_Count (0);
8529 -- pragma Share_Generic (NAME {, NAME});
8531 when Pragma_Share_Generic =>
8533 Process_Generic_List;
8539 -- pragma Shared (LOCAL_NAME);
8541 when Pragma_Shared =>
8543 Process_Atomic_Shared_Volatile;
8545 --------------------
8546 -- Shared_Passive --
8547 --------------------
8549 -- pragma Shared_Passive [(library_unit_NAME)];
8551 -- Set the flag Is_Shared_Passive of program unit name entity
8553 when Pragma_Shared_Passive => Shared_Passive : declare
8554 Cunit_Node : Node_Id;
8555 Cunit_Ent : Entity_Id;
8558 Check_Ada_83_Warning;
8559 Check_Valid_Library_Unit_Pragma;
8561 if Nkind (N) = N_Null_Statement then
8565 Cunit_Node := Cunit (Current_Sem_Unit);
8566 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8568 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8570 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8573 "pragma% can only apply to a package declaration");
8576 Set_Is_Shared_Passive (Cunit_Ent);
8579 ----------------------
8580 -- Source_File_Name --
8581 ----------------------
8583 -- There are five forms for this pragma:
8585 -- pragma Source_File_Name (
8586 -- [UNIT_NAME =>] unit_NAME,
8587 -- BODY_FILE_NAME => STRING_LITERAL
8588 -- [, [INDEX =>] INTEGER_LITERAL]);
8590 -- pragma Source_File_Name (
8591 -- [UNIT_NAME =>] unit_NAME,
8592 -- SPEC_FILE_NAME => STRING_LITERAL
8593 -- [, [INDEX =>] INTEGER_LITERAL]);
8595 -- pragma Source_File_Name (
8596 -- BODY_FILE_NAME => STRING_LITERAL
8597 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8598 -- [, CASING => CASING_SPEC]);
8600 -- pragma Source_File_Name (
8601 -- SPEC_FILE_NAME => STRING_LITERAL
8602 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8603 -- [, CASING => CASING_SPEC]);
8605 -- pragma Source_File_Name (
8606 -- SUBUNIT_FILE_NAME => STRING_LITERAL
8607 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8608 -- [, CASING => CASING_SPEC]);
8610 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
8612 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
8613 -- Source_File_Name (SFN), however their usage is exclusive:
8614 -- SFN can only be used when no project file is used, while
8615 -- SFNP can only be used when a project file is used.
8617 -- No processing here. Processing was completed during parsing,
8618 -- since we need to have file names set as early as possible.
8619 -- Units are loaded well before semantic processing starts.
8621 -- The only processing we defer to this point is the check
8622 -- for correct placement.
8624 when Pragma_Source_File_Name =>
8626 Check_Valid_Configuration_Pragma;
8628 ------------------------------
8629 -- Source_File_Name_Project --
8630 ------------------------------
8632 -- See Source_File_Name for syntax
8634 -- No processing here. Processing was completed during parsing,
8635 -- since we need to have file names set as early as possible.
8636 -- Units are loaded well before semantic processing starts.
8638 -- The only processing we defer to this point is the check
8639 -- for correct placement.
8641 when Pragma_Source_File_Name_Project =>
8643 Check_Valid_Configuration_Pragma;
8645 -- Check that a pragma Source_File_Name_Project is used only
8646 -- in a configuration pragmas file.
8648 -- Pragmas Source_File_Name_Project should only be generated
8649 -- by the Project Manager in configuration pragmas files.
8651 -- This is really an ugly test. It seems to depend on some
8652 -- accidental and undocumented property. At the very least
8653 -- it needs to be documented, but it would be better to have
8654 -- a clean way of testing if we are in a configuration file???
8656 if Present (Parent (N)) then
8658 ("pragma% can only appear in a configuration pragmas file");
8661 ----------------------
8662 -- Source_Reference --
8663 ----------------------
8665 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
8667 -- Nothing to do, all processing completed in Par.Prag, since we
8668 -- need the information for possible parser messages that are output
8670 when Pragma_Source_Reference =>
8677 -- pragma Storage_Size (EXPRESSION);
8679 when Pragma_Storage_Size => Storage_Size : declare
8680 P : constant Node_Id := Parent (N);
8684 Check_No_Identifiers;
8685 Check_Arg_Count (1);
8687 -- The expression must be analyzed in the special manner
8688 -- described in "Handling of Default Expressions" in sem.ads.
8690 -- Set In_Default_Expression for per-object case ???
8692 Arg := Expression (Arg1);
8693 Analyze_Per_Use_Expression (Arg, Any_Integer);
8695 if not Is_Static_Expression (Arg) then
8696 Check_Restriction (Static_Storage_Size, Arg);
8699 if Nkind (P) /= N_Task_Definition then
8704 if Has_Storage_Size_Pragma (P) then
8705 Error_Pragma ("duplicate pragma% not allowed");
8707 Set_Has_Storage_Size_Pragma (P, True);
8710 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8711 -- ??? exp_ch9 should use this!
8719 -- pragma Storage_Unit (NUMERIC_LITERAL);
8721 -- Only permitted argument is System'Storage_Unit value
8723 when Pragma_Storage_Unit =>
8724 Check_No_Identifiers;
8725 Check_Arg_Count (1);
8726 Check_Arg_Is_Integer_Literal (Arg1);
8728 if Intval (Expression (Arg1)) /=
8729 UI_From_Int (Ttypes.System_Storage_Unit)
8731 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
8733 ("the only allowed argument for pragma% is ^", Arg1);
8736 --------------------
8737 -- Stream_Convert --
8738 --------------------
8740 -- pragma Stream_Convert (
8741 -- [Entity =>] type_LOCAL_NAME,
8742 -- [Read =>] function_NAME,
8743 -- [Write =>] function NAME);
8745 when Pragma_Stream_Convert => Stream_Convert : declare
8747 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
8748 -- Check that the given argument is the name of a local
8749 -- function of one argument that is not overloaded earlier
8750 -- in the current local scope. A check is also made that the
8751 -- argument is a function with one parameter.
8753 --------------------------------------
8754 -- Check_OK_Stream_Convert_Function --
8755 --------------------------------------
8757 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
8761 Check_Arg_Is_Local_Name (Arg);
8762 Ent := Entity (Expression (Arg));
8764 if Has_Homonym (Ent) then
8766 ("argument for pragma% may not be overloaded", Arg);
8769 if Ekind (Ent) /= E_Function
8770 or else No (First_Formal (Ent))
8771 or else Present (Next_Formal (First_Formal (Ent)))
8774 ("argument for pragma% must be" &
8775 " function of one argument", Arg);
8777 end Check_OK_Stream_Convert_Function;
8779 -- Start of procecessing for Stream_Convert
8783 Check_Arg_Count (3);
8784 Check_Optional_Identifier (Arg1, Name_Entity);
8785 Check_Optional_Identifier (Arg2, Name_Read);
8786 Check_Optional_Identifier (Arg3, Name_Write);
8787 Check_Arg_Is_Local_Name (Arg1);
8788 Check_OK_Stream_Convert_Function (Arg2);
8789 Check_OK_Stream_Convert_Function (Arg3);
8792 Typ : constant Entity_Id :=
8793 Underlying_Type (Entity (Expression (Arg1)));
8794 Read : constant Entity_Id := Entity (Expression (Arg2));
8795 Write : constant Entity_Id := Entity (Expression (Arg3));
8798 if Etype (Typ) = Any_Type
8800 Etype (Read) = Any_Type
8802 Etype (Write) = Any_Type
8807 Check_First_Subtype (Arg1);
8809 if Rep_Item_Too_Early (Typ, N)
8811 Rep_Item_Too_Late (Typ, N)
8816 if Underlying_Type (Etype (Read)) /= Typ then
8818 ("incorrect return type for function&", Arg2);
8821 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
8823 ("incorrect parameter type for function&", Arg3);
8826 if Underlying_Type (Etype (First_Formal (Read))) /=
8827 Underlying_Type (Etype (Write))
8830 ("result type of & does not match Read parameter type",
8836 -------------------------
8837 -- Style_Checks (GNAT) --
8838 -------------------------
8840 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
8842 -- This is processed by the parser since some of the style
8843 -- checks take place during source scanning and parsing. This
8844 -- means that we don't need to issue error messages here.
8846 when Pragma_Style_Checks => Style_Checks : declare
8847 A : constant Node_Id := Expression (Arg1);
8853 Check_No_Identifiers;
8855 -- Two argument form
8857 if Arg_Count = 2 then
8858 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
8865 E_Id := Expression (Arg2);
8868 if not Is_Entity_Name (E_Id) then
8870 ("second argument of pragma% must be entity name",
8880 Set_Suppress_Style_Checks (E,
8881 (Chars (Expression (Arg1)) = Name_Off));
8882 exit when No (Homonym (E));
8888 -- One argument form
8891 Check_Arg_Count (1);
8893 if Nkind (A) = N_String_Literal then
8897 Slen : constant Natural := Natural (String_Length (S));
8898 Options : String (1 .. Slen);
8904 C := Get_String_Char (S, Int (J));
8905 exit when not In_Character_Range (C);
8906 Options (J) := Get_Character (C);
8909 Set_Style_Check_Options (Options);
8917 elsif Nkind (A) = N_Identifier then
8919 if Chars (A) = Name_All_Checks then
8920 Set_Default_Style_Check_Options;
8922 elsif Chars (A) = Name_On then
8923 Style_Check := True;
8925 elsif Chars (A) = Name_Off then
8926 Style_Check := False;
8937 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
8939 when Pragma_Subtitle =>
8941 Check_Arg_Count (1);
8942 Check_Optional_Identifier (Arg1, Name_Subtitle);
8943 Check_Arg_Is_String_Literal (Arg1);
8949 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
8951 when Pragma_Suppress =>
8952 Process_Suppress_Unsuppress (True);
8958 -- pragma Suppress_All;
8960 -- The only check made here is that the pragma appears in the
8961 -- proper place, i.e. following a compilation unit. If indeed
8962 -- it appears in this context, then the parser has already
8963 -- inserted an equivalent pragma Suppress (All_Checks) to get
8964 -- the required effect.
8966 when Pragma_Suppress_All =>
8968 Check_Arg_Count (0);
8970 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
8971 or else not Is_List_Member (N)
8972 or else List_Containing (N) /= Pragmas_After (Parent (N))
8975 ("misplaced pragma%, must follow compilation unit");
8978 -------------------------
8979 -- Suppress_Debug_Info --
8980 -------------------------
8982 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
8984 when Pragma_Suppress_Debug_Info =>
8986 Check_Arg_Count (1);
8987 Check_Arg_Is_Local_Name (Arg1);
8988 Check_Optional_Identifier (Arg1, Name_Entity);
8989 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
8991 ----------------------------------
8992 -- Suppress_Exception_Locations --
8993 ----------------------------------
8995 -- pragma Suppress_Exception_Locations;
8997 when Pragma_Suppress_Exception_Locations =>
8999 Check_Arg_Count (0);
9000 Check_Valid_Configuration_Pragma;
9001 Exception_Locations_Suppressed := True;
9003 -----------------------------
9004 -- Suppress_Initialization --
9005 -----------------------------
9007 -- pragma Suppress_Initialization ([Entity =>] type_Name);
9009 when Pragma_Suppress_Initialization => Suppress_Init : declare
9015 Check_Arg_Count (1);
9016 Check_Optional_Identifier (Arg1, Name_Entity);
9017 Check_Arg_Is_Local_Name (Arg1);
9019 E_Id := Expression (Arg1);
9021 if Etype (E_Id) = Any_Type then
9028 if Is_Incomplete_Or_Private_Type (E) then
9029 if No (Full_View (Base_Type (E))) then
9031 ("argument of pragma% cannot be an incomplete type",
9034 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
9037 Set_Suppress_Init_Proc (Base_Type (E));
9042 ("pragma% requires argument that is a type name", Arg1);
9050 -- pragma System_Name (DIRECT_NAME);
9052 -- Syntax check: one argument, which must be the identifier GNAT
9053 -- or the identifier GCC, no other identifiers are acceptable.
9055 when Pragma_System_Name =>
9056 Check_No_Identifiers;
9057 Check_Arg_Count (1);
9058 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
9060 -----------------------------
9061 -- Task_Dispatching_Policy --
9062 -----------------------------
9064 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
9066 when Pragma_Task_Dispatching_Policy => declare
9070 Check_Ada_83_Warning;
9071 Check_Arg_Count (1);
9072 Check_No_Identifiers;
9073 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9074 Check_Valid_Configuration_Pragma;
9075 Get_Name_String (Chars (Expression (Arg1)));
9076 DP := Fold_Upper (Name_Buffer (1));
9078 if Task_Dispatching_Policy /= ' '
9079 and then Task_Dispatching_Policy /= DP
9081 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9083 ("task dispatching policy incompatible with policy#");
9085 -- Set new policy, but always preserve System_Location since
9086 -- we like the error message with the run time name.
9089 Task_Dispatching_Policy := DP;
9091 if Task_Dispatching_Policy_Sloc /= System_Location then
9092 Task_Dispatching_Policy_Sloc := Loc;
9101 -- pragma Task_Info (EXPRESSION);
9103 when Pragma_Task_Info => Task_Info : declare
9104 P : constant Node_Id := Parent (N);
9109 if Nkind (P) /= N_Task_Definition then
9110 Error_Pragma ("pragma% must appear in task definition");
9113 Check_No_Identifiers;
9114 Check_Arg_Count (1);
9116 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
9118 if Etype (Expression (Arg1)) = Any_Type then
9122 if Has_Task_Info_Pragma (P) then
9123 Error_Pragma ("duplicate pragma% not allowed");
9125 Set_Has_Task_Info_Pragma (P, True);
9133 -- pragma Task_Name (string_EXPRESSION);
9135 when Pragma_Task_Name => Task_Name : declare
9136 -- pragma Priority (EXPRESSION);
9138 P : constant Node_Id := Parent (N);
9142 Check_No_Identifiers;
9143 Check_Arg_Count (1);
9145 Arg := Expression (Arg1);
9146 Analyze_And_Resolve (Arg, Standard_String);
9148 if Nkind (P) /= N_Task_Definition then
9152 if Has_Task_Name_Pragma (P) then
9153 Error_Pragma ("duplicate pragma% not allowed");
9155 Set_Has_Task_Name_Pragma (P, True);
9156 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9164 -- pragma Task_Storage (
9165 -- [Task_Type =>] LOCAL_NAME,
9166 -- [Top_Guard =>] static_integer_EXPRESSION);
9168 when Pragma_Task_Storage => Task_Storage : declare
9169 Args : Args_List (1 .. 2);
9170 Names : constant Name_List (1 .. 2) := (
9174 Task_Type : Node_Id renames Args (1);
9175 Top_Guard : Node_Id renames Args (2);
9181 Gather_Associations (Names, Args);
9183 if No (Task_Type) then
9185 ("missing task_type argument for pragma%");
9188 Check_Arg_Is_Local_Name (Task_Type);
9190 Ent := Entity (Task_Type);
9192 if not Is_Task_Type (Ent) then
9194 ("argument for pragma% must be task type", Task_Type);
9197 if No (Top_Guard) then
9199 ("pragma% takes two arguments", Task_Type);
9201 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
9204 Check_First_Subtype (Task_Type);
9206 if Rep_Item_Too_Late (Ent, N) then
9215 -- pragma Thread_Body
9216 -- ( [Entity =>] LOCAL_NAME
9217 -- [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);
9219 when Pragma_Thread_Body => Thread_Body : declare
9226 Check_At_Least_N_Arguments (1);
9227 Check_At_Most_N_Arguments (2);
9228 Check_Optional_Identifier (Arg1, Name_Entity);
9229 Check_Arg_Is_Local_Name (Arg1);
9231 Id := Expression (Arg1);
9233 if not Is_Entity_Name (Id)
9234 or else not Is_Subprogram (Entity (Id))
9236 Error_Pragma_Arg ("subprogram name required", Arg1);
9241 -- Go to renamed subprogram if present, since Thread_Body applies
9242 -- to the actual renamed entity, not to the renaming entity.
9244 if Present (Alias (E))
9245 and then Nkind (Parent (Declaration_Node (E))) =
9246 N_Subprogram_Renaming_Declaration
9251 -- Various error checks
9253 if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
9255 ("pragma% requires separate spec and must come before body");
9257 elsif Rep_Item_Too_Early (E, N)
9259 Rep_Item_Too_Late (E, N)
9263 elsif Is_Thread_Body (E) then
9265 ("only one thread body pragma allowed", Arg1);
9267 elsif Present (Homonym (E))
9268 and then Scope (Homonym (E)) = Current_Scope
9271 ("thread body subprogram must not be overloaded", Arg1);
9274 Set_Is_Thread_Body (E);
9276 -- Deal with secondary stack argument
9278 if Arg_Count = 2 then
9279 Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
9280 SS := Expression (Arg2);
9281 Analyze_And_Resolve (SS, Any_Integer);
9289 -- pragma Time_Slice (static_duration_EXPRESSION);
9291 when Pragma_Time_Slice => Time_Slice : declare
9297 Check_Arg_Count (1);
9298 Check_No_Identifiers;
9299 Check_In_Main_Program;
9300 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
9302 if not Error_Posted (Arg1) then
9304 while Present (Nod) loop
9305 if Nkind (Nod) = N_Pragma
9306 and then Chars (Nod) = Name_Time_Slice
9308 Error_Msg_Name_1 := Chars (N);
9309 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9316 -- Process only if in main unit
9318 if Get_Source_Unit (Loc) = Main_Unit then
9319 Opt.Time_Slice_Set := True;
9320 Val := Expr_Value_R (Expression (Arg1));
9322 if Val <= Ureal_0 then
9323 Opt.Time_Slice_Value := 0;
9325 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
9326 Opt.Time_Slice_Value := 1_000_000_000;
9329 Opt.Time_Slice_Value :=
9330 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
9339 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
9341 -- TITLING_OPTION ::=
9342 -- [Title =>] STRING_LITERAL
9343 -- | [Subtitle =>] STRING_LITERAL
9345 when Pragma_Title => Title : declare
9346 Args : Args_List (1 .. 2);
9347 Names : constant Name_List (1 .. 2) := (
9353 Gather_Associations (Names, Args);
9355 for J in 1 .. 2 loop
9356 if Present (Args (J)) then
9357 Check_Arg_Is_String_Literal (Args (J));
9362 ---------------------
9363 -- Unchecked_Union --
9364 ---------------------
9366 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
9368 when Pragma_Unchecked_Union => Unchecked_Union : declare
9369 Assoc : constant Node_Id := Arg1;
9370 Type_Id : constant Node_Id := Expression (Assoc);
9381 Check_No_Identifiers;
9382 Check_Arg_Count (1);
9383 Check_Arg_Is_Local_Name (Arg1);
9385 Find_Type (Type_Id);
9386 Typ := Entity (Type_Id);
9389 or else Rep_Item_Too_Early (Typ, N)
9393 Typ := Underlying_Type (Typ);
9396 if Rep_Item_Too_Late (Typ, N) then
9400 Check_First_Subtype (Arg1);
9402 -- Note remaining cases are references to a type in the current
9403 -- declarative part. If we find an error, we post the error on
9404 -- the relevant type declaration at an appropriate point.
9406 if not Is_Record_Type (Typ) then
9407 Error_Msg_N ("Unchecked_Union must be record type", Typ);
9410 elsif Is_Tagged_Type (Typ) then
9411 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
9414 elsif Is_Limited_Type (Typ) then
9416 ("Unchecked_Union must not be limited record type", Typ);
9417 Explain_Limited_Type (Typ, Typ);
9421 if not Has_Discriminants (Typ) then
9423 ("Unchecked_Union must have one discriminant", Typ);
9427 Discr := First_Discriminant (Typ);
9429 if Present (Next_Discriminant (Discr)) then
9431 ("Unchecked_Union must have exactly one discriminant",
9432 Next_Discriminant (Discr));
9436 if No (Discriminant_Default_Value (Discr)) then
9438 ("Unchecked_Union discriminant must have default value",
9442 Tdef := Type_Definition (Declaration_Node (Typ));
9443 Clist := Component_List (Tdef);
9445 if No (Clist) or else No (Variant_Part (Clist)) then
9447 ("Unchecked_Union must have variant part",
9452 Vpart := Variant_Part (Clist);
9454 if Is_Non_Empty_List (Component_Items (Clist)) then
9456 ("components before variant not allowed " &
9457 "in Unchecked_Union",
9458 First (Component_Items (Clist)));
9461 Variant := First (Variants (Vpart));
9462 while Present (Variant) loop
9463 Clist := Component_List (Variant);
9465 if Present (Variant_Part (Clist)) then
9467 ("Unchecked_Union may not have nested variants",
9468 Variant_Part (Clist));
9471 if not Is_Non_Empty_List (Component_Items (Clist)) then
9473 ("Unchecked_Union may not have empty component list",
9478 Comp := First (Component_Items (Clist));
9480 if Nkind (Comp) = N_Component_Declaration then
9482 if Present (Expression (Comp)) then
9484 ("default initialization not allowed " &
9485 "in Unchecked_Union",
9490 Sindic : constant Node_Id :=
9491 Subtype_Indication (Component_Definition (Comp));
9494 if Nkind (Sindic) = N_Subtype_Indication then
9495 Check_Static_Constraint (Constraint (Sindic));
9500 if Present (Next (Comp)) then
9502 ("Unchecked_Union variant can have only one component",
9510 Set_Is_Unchecked_Union (Typ, True);
9511 Set_Convention (Typ, Convention_C);
9513 Set_Has_Unchecked_Union (Base_Type (Typ), True);
9514 Set_Is_Unchecked_Union (Base_Type (Typ), True);
9515 end Unchecked_Union;
9517 ------------------------
9518 -- Unimplemented_Unit --
9519 ------------------------
9521 -- pragma Unimplemented_Unit;
9523 -- Note: this only gives an error if we are generating code,
9524 -- or if we are in a generic library unit (where the pragma
9525 -- appears in the body, not in the spec).
9527 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
9528 Cunitent : constant Entity_Id :=
9529 Cunit_Entity (Get_Source_Unit (Loc));
9530 Ent_Kind : constant Entity_Kind :=
9535 Check_Arg_Count (0);
9537 if Operating_Mode = Generate_Code
9538 or else Ent_Kind = E_Generic_Function
9539 or else Ent_Kind = E_Generic_Procedure
9540 or else Ent_Kind = E_Generic_Package
9542 Get_Name_String (Chars (Cunitent));
9543 Set_Casing (Mixed_Case);
9544 Write_Str (Name_Buffer (1 .. Name_Len));
9545 Write_Str (" is not implemented");
9547 raise Unrecoverable_Error;
9549 end Unimplemented_Unit;
9551 --------------------
9552 -- Universal_Data --
9553 --------------------
9555 -- pragma Universal_Data [(library_unit_NAME)];
9557 when Pragma_Universal_Data =>
9560 -- If this is a configuration pragma, then set the universal
9561 -- addressing option, otherwise confirm that the pragma
9562 -- satisfies the requirements of library unit pragma placement
9563 -- and leave it to the GNAAMP back end to detect the pragma
9564 -- (avoids transitive setting of the option due to withed units).
9566 if Is_Configuration_Pragma then
9567 Universal_Addressing_On_AAMP := True;
9569 Check_Valid_Library_Unit_Pragma;
9572 if not AAMP_On_Target then
9573 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
9580 -- pragma Unreferenced (local_Name {, local_Name});
9582 when Pragma_Unreferenced => Unreferenced : declare
9585 Arg_Ent : Entity_Id;
9589 Check_At_Least_N_Arguments (1);
9593 while Present (Arg_Node) loop
9594 Check_No_Identifier (Arg_Node);
9596 -- Note that the analyze call done by Check_Arg_Is_Local_Name
9597 -- will in fact generate a reference, so that the entity will
9598 -- have a reference, which will inhibit any warnings about it
9599 -- not being referenced, and also properly show up in the ali
9600 -- file as a reference. But this reference is recorded before
9601 -- the Has_Pragma_Unreferenced flag is set, so that no warning
9602 -- is generated for this reference.
9604 Check_Arg_Is_Local_Name (Arg_Node);
9605 Arg_Expr := Get_Pragma_Arg (Arg_Node);
9607 if Is_Entity_Name (Arg_Expr) then
9608 Arg_Ent := Entity (Arg_Expr);
9610 -- If the entity is overloaded, the pragma applies to the
9611 -- most recent overloading, as documented. In this case,
9612 -- name resolution does not generate a reference, so it
9613 -- must be done here explicitly.
9615 if Is_Overloaded (Arg_Expr) then
9616 Generate_Reference (Arg_Ent, N);
9619 Set_Has_Pragma_Unreferenced (Arg_Ent);
9626 ------------------------------
9627 -- Unreserve_All_Interrupts --
9628 ------------------------------
9630 -- pragma Unreserve_All_Interrupts;
9632 when Pragma_Unreserve_All_Interrupts =>
9634 Check_Arg_Count (0);
9636 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
9637 Unreserve_All_Interrupts := True;
9644 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
9646 when Pragma_Unsuppress =>
9648 Process_Suppress_Unsuppress (False);
9654 -- pragma Use_VADS_Size;
9656 when Pragma_Use_VADS_Size =>
9658 Check_Arg_Count (0);
9659 Check_Valid_Configuration_Pragma;
9660 Use_VADS_Size := True;
9662 ---------------------
9663 -- Validity_Checks --
9664 ---------------------
9666 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
9668 when Pragma_Validity_Checks => Validity_Checks : declare
9669 A : constant Node_Id := Expression (Arg1);
9675 Check_Arg_Count (1);
9676 Check_No_Identifiers;
9678 if Nkind (A) = N_String_Literal then
9682 Slen : constant Natural := Natural (String_Length (S));
9683 Options : String (1 .. Slen);
9689 C := Get_String_Char (S, Int (J));
9690 exit when not In_Character_Range (C);
9691 Options (J) := Get_Character (C);
9694 Set_Validity_Check_Options (Options);
9702 elsif Nkind (A) = N_Identifier then
9704 if Chars (A) = Name_All_Checks then
9705 Set_Validity_Check_Options ("a");
9707 elsif Chars (A) = Name_On then
9708 Validity_Checks_On := True;
9710 elsif Chars (A) = Name_Off then
9711 Validity_Checks_On := False;
9715 end Validity_Checks;
9721 -- pragma Volatile (LOCAL_NAME);
9723 when Pragma_Volatile =>
9724 Process_Atomic_Shared_Volatile;
9726 -------------------------
9727 -- Volatile_Components --
9728 -------------------------
9730 -- pragma Volatile_Components (array_LOCAL_NAME);
9732 -- Volatile is handled by the same circuit as Atomic_Components
9738 -- pragma Warnings (On | Off, [LOCAL_NAME])
9740 when Pragma_Warnings => Warnings : begin
9742 Check_At_Least_N_Arguments (1);
9743 Check_At_Most_N_Arguments (2);
9744 Check_No_Identifiers;
9746 -- One argument case was processed by parser in Par.Prag
9748 if Arg_Count /= 1 then
9749 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9750 Check_Arg_Count (2);
9757 E_Id := Expression (Arg2);
9760 -- In the expansion of an inlined body, a reference to
9761 -- the formal may be wrapped in a conversion if the actual
9762 -- is a conversion. Retrieve the real entity name.
9764 if (In_Instance_Body
9765 or else In_Inlined_Body)
9766 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
9768 E_Id := Expression (E_Id);
9771 if not Is_Entity_Name (E_Id) then
9773 ("second argument of pragma% must be entity name",
9783 Set_Warnings_Off (E,
9784 (Chars (Expression (Arg1)) = Name_Off));
9786 if Is_Enumeration_Type (E) then
9788 Lit : Entity_Id := First_Literal (E);
9791 while Present (Lit) loop
9792 Set_Warnings_Off (Lit);
9798 exit when No (Homonym (E));
9810 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
9812 when Pragma_Weak_External => Weak_External : declare
9817 Check_Arg_Count (1);
9818 Check_Optional_Identifier (Arg1, Name_Entity);
9819 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9820 Ent := Entity (Expression (Arg1));
9822 if Rep_Item_Too_Early (Ent, N) then
9825 Ent := Underlying_Type (Ent);
9828 -- The only processing required is to link this item on to the
9829 -- list of rep items for the given entity. This is accomplished
9830 -- by the call to Rep_Item_Too_Late (when no error is detected
9831 -- and False is returned).
9833 if Rep_Item_Too_Late (Ent, N) then
9836 Set_Has_Gigi_Rep_Item (Ent);
9840 --------------------
9841 -- Unknown_Pragma --
9842 --------------------
9844 -- Should be impossible, since the case of an unknown pragma is
9845 -- separately processed before the case statement is entered.
9847 when Unknown_Pragma =>
9848 raise Program_Error;
9852 when Pragma_Exit => null;
9855 ---------------------------------
9856 -- Delay_Config_Pragma_Analyze --
9857 ---------------------------------
9859 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
9861 return Chars (N) = Name_Interrupt_State;
9862 end Delay_Config_Pragma_Analyze;
9864 -------------------------
9865 -- Get_Base_Subprogram --
9866 -------------------------
9868 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
9874 -- Follow subprogram renaming chain
9876 while Is_Subprogram (Result)
9878 (Is_Generic_Instance (Result)
9879 or else Nkind (Parent (Declaration_Node (Result))) =
9880 N_Subprogram_Renaming_Declaration)
9881 and then Present (Alias (Result))
9883 Result := Alias (Result);
9887 end Get_Base_Subprogram;
9889 -----------------------------
9890 -- Is_Config_Static_String --
9891 -----------------------------
9893 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
9895 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
9896 -- This is an internal recursive function that is just like the
9897 -- outer function except that it adds the string to the name buffer
9898 -- rather than placing the string in the name buffer.
9900 ------------------------------
9901 -- Add_Config_Static_String --
9902 ------------------------------
9904 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
9911 if Nkind (N) = N_Op_Concat then
9912 if Add_Config_Static_String (Left_Opnd (N)) then
9913 N := Right_Opnd (N);
9919 if Nkind (N) /= N_String_Literal then
9920 Error_Msg_N ("string literal expected for pragma argument", N);
9924 for J in 1 .. String_Length (Strval (N)) loop
9925 C := Get_String_Char (Strval (N), J);
9927 if not In_Character_Range (C) then
9929 ("string literal contains invalid wide character",
9930 Sloc (N) + 1 + Source_Ptr (J));
9934 Add_Char_To_Name_Buffer (Get_Character (C));
9939 end Add_Config_Static_String;
9941 -- Start of prorcessing for Is_Config_Static_String
9945 return Add_Config_Static_String (Arg);
9946 end Is_Config_Static_String;
9948 -----------------------------------------
9949 -- Is_Non_Significant_Pragma_Reference --
9950 -----------------------------------------
9952 -- This function makes use of the following static table which indicates
9953 -- whether a given pragma is significant. A value of -1 in this table
9954 -- indicates that the reference is significant. A value of zero indicates
9955 -- than appearence as any argument is insignificant, a positive value
9956 -- indicates that appearence in that parameter position is significant.
9958 Sig_Flags : constant array (Pragma_Id) of Int :=
9959 (Pragma_AST_Entry => -1,
9960 Pragma_Abort_Defer => -1,
9961 Pragma_Ada_83 => -1,
9962 Pragma_Ada_95 => -1,
9963 Pragma_All_Calls_Remote => -1,
9964 Pragma_Annotate => -1,
9965 Pragma_Assert => -1,
9966 Pragma_Asynchronous => -1,
9968 Pragma_Atomic_Components => 0,
9969 Pragma_Attach_Handler => -1,
9970 Pragma_CPP_Class => 0,
9971 Pragma_CPP_Constructor => 0,
9972 Pragma_CPP_Virtual => 0,
9973 Pragma_CPP_Vtable => 0,
9974 Pragma_C_Pass_By_Copy => 0,
9975 Pragma_Comment => 0,
9976 Pragma_Common_Object => -1,
9977 Pragma_Compile_Time_Warning => -1,
9978 Pragma_Complex_Representation => 0,
9979 Pragma_Component_Alignment => -1,
9980 Pragma_Controlled => 0,
9981 Pragma_Convention => 0,
9982 Pragma_Convention_Identifier => 0,
9984 Pragma_Discard_Names => 0,
9985 Pragma_Elaborate => -1,
9986 Pragma_Elaborate_All => -1,
9987 Pragma_Elaborate_Body => -1,
9988 Pragma_Elaboration_Checks => -1,
9989 Pragma_Eliminate => -1,
9990 Pragma_Explicit_Overriding => -1,
9991 Pragma_Export => -1,
9992 Pragma_Export_Exception => -1,
9993 Pragma_Export_Function => -1,
9994 Pragma_Export_Object => -1,
9995 Pragma_Export_Procedure => -1,
9996 Pragma_Export_Value => -1,
9997 Pragma_Export_Valued_Procedure => -1,
9998 Pragma_Extend_System => -1,
9999 Pragma_Extensions_Allowed => -1,
10000 Pragma_External => -1,
10001 Pragma_External_Name_Casing => -1,
10002 Pragma_Finalize_Storage_Only => 0,
10003 Pragma_Float_Representation => 0,
10004 Pragma_Ident => -1,
10005 Pragma_Import => +2,
10006 Pragma_Import_Exception => 0,
10007 Pragma_Import_Function => 0,
10008 Pragma_Import_Object => 0,
10009 Pragma_Import_Procedure => 0,
10010 Pragma_Import_Valued_Procedure => 0,
10011 Pragma_Initialize_Scalars => -1,
10012 Pragma_Inline => 0,
10013 Pragma_Inline_Always => 0,
10014 Pragma_Inline_Generic => 0,
10015 Pragma_Inspection_Point => -1,
10016 Pragma_Interface => +2,
10017 Pragma_Interface_Name => +2,
10018 Pragma_Interrupt_Handler => -1,
10019 Pragma_Interrupt_Priority => -1,
10020 Pragma_Interrupt_State => -1,
10021 Pragma_Java_Constructor => -1,
10022 Pragma_Java_Interface => -1,
10023 Pragma_Keep_Names => 0,
10024 Pragma_License => -1,
10025 Pragma_Link_With => -1,
10026 Pragma_Linker_Alias => -1,
10027 Pragma_Linker_Options => -1,
10028 Pragma_Linker_Section => -1,
10030 Pragma_Locking_Policy => -1,
10031 Pragma_Long_Float => -1,
10032 Pragma_Machine_Attribute => -1,
10034 Pragma_Main_Storage => -1,
10035 Pragma_Memory_Size => -1,
10036 Pragma_No_Return => 0,
10037 Pragma_No_Run_Time => -1,
10038 Pragma_No_Strict_Aliasing => -1,
10039 Pragma_Normalize_Scalars => -1,
10040 Pragma_Obsolescent => 0,
10041 Pragma_Optimize => -1,
10042 Pragma_Optional_Overriding => -1,
10043 Pragma_Overriding => -1,
10046 Pragma_Passive => -1,
10047 Pragma_Polling => -1,
10048 Pragma_Persistent_Data => -1,
10049 Pragma_Persistent_Object => -1,
10050 Pragma_Preelaborate => -1,
10051 Pragma_Priority => -1,
10052 Pragma_Profile => 0,
10053 Pragma_Propagate_Exceptions => -1,
10054 Pragma_Psect_Object => -1,
10056 Pragma_Pure_Function => 0,
10057 Pragma_Queuing_Policy => -1,
10058 Pragma_Ravenscar => -1,
10059 Pragma_Remote_Call_Interface => -1,
10060 Pragma_Remote_Types => -1,
10061 Pragma_Restricted_Run_Time => -1,
10062 Pragma_Restriction_Warnings => -1,
10063 Pragma_Restrictions => -1,
10064 Pragma_Reviewable => -1,
10065 Pragma_Share_Generic => -1,
10066 Pragma_Shared => -1,
10067 Pragma_Shared_Passive => -1,
10068 Pragma_Source_File_Name => -1,
10069 Pragma_Source_File_Name_Project => -1,
10070 Pragma_Source_Reference => -1,
10071 Pragma_Storage_Size => -1,
10072 Pragma_Storage_Unit => -1,
10073 Pragma_Stream_Convert => -1,
10074 Pragma_Style_Checks => -1,
10075 Pragma_Subtitle => -1,
10076 Pragma_Suppress => 0,
10077 Pragma_Suppress_Exception_Locations => 0,
10078 Pragma_Suppress_All => -1,
10079 Pragma_Suppress_Debug_Info => 0,
10080 Pragma_Suppress_Initialization => 0,
10081 Pragma_System_Name => -1,
10082 Pragma_Task_Dispatching_Policy => -1,
10083 Pragma_Task_Info => -1,
10084 Pragma_Task_Name => -1,
10085 Pragma_Task_Storage => 0,
10086 Pragma_Thread_Body => +2,
10087 Pragma_Time_Slice => -1,
10088 Pragma_Title => -1,
10089 Pragma_Unchecked_Union => -1,
10090 Pragma_Unimplemented_Unit => -1,
10091 Pragma_Universal_Data => -1,
10092 Pragma_Unreferenced => -1,
10093 Pragma_Unreserve_All_Interrupts => -1,
10094 Pragma_Unsuppress => 0,
10095 Pragma_Use_VADS_Size => -1,
10096 Pragma_Validity_Checks => -1,
10097 Pragma_Volatile => 0,
10098 Pragma_Volatile_Components => 0,
10099 Pragma_Warnings => -1,
10100 Pragma_Weak_External => 0,
10101 Unknown_Pragma => 0);
10103 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
10111 if Nkind (P) /= N_Pragma_Argument_Association then
10115 C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
10125 A := First (Pragma_Argument_Associations (Parent (P)));
10126 for J in 1 .. C - 1 loop
10137 end Is_Non_Significant_Pragma_Reference;
10139 ------------------------------
10140 -- Is_Pragma_String_Literal --
10141 ------------------------------
10143 -- This function returns true if the corresponding pragma argument is
10144 -- a static string expression. These are the only cases in which string
10145 -- literals can appear as pragma arguments. We also allow a string
10146 -- literal as the first argument to pragma Assert (although it will
10147 -- of course always generate a type error).
10149 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
10150 Pragn : constant Node_Id := Parent (Par);
10151 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
10152 Pname : constant Name_Id := Chars (Pragn);
10158 N := First (Assoc);
10165 if Pname = Name_Assert then
10168 elsif Pname = Name_Export then
10171 elsif Pname = Name_Ident then
10174 elsif Pname = Name_Import then
10177 elsif Pname = Name_Interface_Name then
10180 elsif Pname = Name_Linker_Alias then
10183 elsif Pname = Name_Linker_Section then
10186 elsif Pname = Name_Machine_Attribute then
10189 elsif Pname = Name_Source_File_Name then
10192 elsif Pname = Name_Source_Reference then
10195 elsif Pname = Name_Title then
10198 elsif Pname = Name_Subtitle then
10204 end Is_Pragma_String_Literal;
10206 --------------------------------------
10207 -- Process_Compilation_Unit_Pragmas --
10208 --------------------------------------
10210 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
10212 -- A special check for pragma Suppress_All. This is a strange DEC
10213 -- pragma, strange because it comes at the end of the unit. If we
10214 -- have a pragma Suppress_All in the Pragmas_After of the current
10215 -- unit, then we insert a pragma Suppress (All_Checks) at the start
10216 -- of the context clause to ensure the correct processing.
10219 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
10223 if Present (PA) then
10225 while Present (P) loop
10226 if Chars (P) = Name_Suppress_All then
10227 Prepend_To (Context_Items (N),
10228 Make_Pragma (Sloc (P),
10229 Chars => Name_Suppress,
10230 Pragma_Argument_Associations => New_List (
10231 Make_Pragma_Argument_Association (Sloc (P),
10233 Make_Identifier (Sloc (P),
10234 Chars => Name_All_Checks)))));
10242 end Process_Compilation_Unit_Pragmas;
10244 --------------------------------
10245 -- Set_Encoded_Interface_Name --
10246 --------------------------------
10248 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
10249 Str : constant String_Id := Strval (S);
10250 Len : constant Int := String_Length (Str);
10255 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
10258 -- Stores encoded value of character code CC. The encoding we
10259 -- use an underscore followed by four lower case hex digits.
10261 procedure Encode is
10263 Store_String_Char (Get_Char_Code ('_'));
10265 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
10267 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
10269 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
10271 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
10274 -- Start of processing for Set_Encoded_Interface_Name
10277 -- If first character is asterisk, this is a link name, and we
10278 -- leave it completely unmodified. We also ignore null strings
10279 -- (the latter case happens only in error cases) and no encoding
10280 -- should occur for Java interface names.
10283 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
10286 Set_Interface_Name (E, S);
10291 CC := Get_String_Char (Str, J);
10293 exit when not In_Character_Range (CC);
10295 C := Get_Character (CC);
10297 exit when C /= '_' and then C /= '$'
10298 and then C not in '0' .. '9'
10299 and then C not in 'a' .. 'z'
10300 and then C not in 'A' .. 'Z';
10303 Set_Interface_Name (E, S);
10311 -- Here we need to encode. The encoding we use as follows:
10312 -- three underscores + four hex digits (lower case)
10316 for J in 1 .. String_Length (Str) loop
10317 CC := Get_String_Char (Str, J);
10319 if not In_Character_Range (CC) then
10322 C := Get_Character (CC);
10324 if C = '_' or else C = '$'
10325 or else C in '0' .. '9'
10326 or else C in 'a' .. 'z'
10327 or else C in 'A' .. 'Z'
10329 Store_String_Char (CC);
10336 Set_Interface_Name (E,
10337 Make_String_Literal (Sloc (S),
10338 Strval => End_String));
10340 end Set_Encoded_Interface_Name;
10342 -------------------
10343 -- Set_Unit_Name --
10344 -------------------
10346 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
10351 if Nkind (N) = N_Identifier
10352 and then Nkind (With_Item) = N_Identifier
10354 Set_Entity (N, Entity (With_Item));
10356 elsif Nkind (N) = N_Selected_Component then
10357 Change_Selected_Component_To_Expanded_Name (N);
10358 Set_Entity (N, Entity (With_Item));
10359 Set_Entity (Selector_Name (N), Entity (N));
10361 Pref := Prefix (N);
10362 Scop := Scope (Entity (N));
10364 while Nkind (Pref) = N_Selected_Component loop
10365 Change_Selected_Component_To_Expanded_Name (Pref);
10366 Set_Entity (Selector_Name (Pref), Scop);
10367 Set_Entity (Pref, Scop);
10368 Pref := Prefix (Pref);
10369 Scop := Scope (Scop);
10372 Set_Entity (Pref, Scop);