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_Interrupts, 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
3253 procedure Set_Warning (R : All_Restrictions) is
3255 if Prag_Id = Pragma_Restriction_Warnings then
3256 Restriction_Warnings (R) := True;
3260 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
3263 Check_Ada_83_Warning;
3264 Check_At_Least_N_Arguments (1);
3265 Check_Valid_Configuration_Pragma;
3268 while Present (Arg) loop
3270 Expr := Expression (Arg);
3272 -- Case of no restriction identifier
3274 if Id = No_Name then
3275 if Nkind (Expr) /= N_Identifier then
3277 ("invalid form for restriction", Arg);
3280 -- No_Requeue is a synonym for No_Requeue_Statements
3282 if Chars (Expr) = Name_No_Requeue then
3284 (No_Implementation_Restrictions, Arg);
3285 Set_Restriction (No_Requeue_Statements, N);
3286 Set_Warning (No_Requeue_Statements);
3288 -- No_Task_Attributes is a synonym for
3289 -- No_Task_Attributes_Package
3291 elsif Chars (Expr) = Name_No_Task_Attributes then
3293 (No_Implementation_Restrictions, Arg);
3294 Set_Restriction (No_Task_Attributes_Package, N);
3295 Set_Warning (No_Task_Attributes_Package);
3297 -- Normal processing for all other cases
3300 R_Id := Get_Restriction_Id (Chars (Expr));
3302 if R_Id not in All_Boolean_Restrictions then
3304 ("invalid restriction identifier", Arg);
3306 -- Restriction is active
3309 if Implementation_Restriction (R_Id) then
3311 (No_Implementation_Restrictions, Arg);
3314 Set_Restriction (R_Id, N);
3317 -- A very special case that must be processed here:
3318 -- pragma Restrictions (No_Exceptions) turns off
3319 -- all run-time checking. This is a bit dubious in
3320 -- terms of the formal language definition, but it
3321 -- is what is intended by RM H.4(12).
3323 if R_Id = No_Exceptions then
3324 Scope_Suppress := (others => True);
3330 -- Case of restriction identifier present
3333 R_Id := Get_Restriction_Id (Id);
3334 Analyze_And_Resolve (Expr, Any_Integer);
3336 if R_Id not in All_Parameter_Restrictions then
3338 ("invalid restriction parameter identifier", Arg);
3340 elsif not Is_OK_Static_Expression (Expr) then
3341 Flag_Non_Static_Expr
3342 ("value must be static expression!", Expr);
3345 elsif not Is_Integer_Type (Etype (Expr))
3346 or else Expr_Value (Expr) < 0
3349 ("value must be non-negative integer", Arg);
3351 -- Restriction pragma is active
3354 Val := Expr_Value (Expr);
3356 if not UI_Is_In_Int_Range (Val) then
3358 ("pragma ignored, value too large?", Arg);
3360 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
3368 end Process_Restrictions_Or_Restriction_Warnings;
3370 ---------------------------------
3371 -- Process_Suppress_Unsuppress --
3372 ---------------------------------
3374 -- Note: this procedure makes entries in the check suppress data
3375 -- structures managed by Sem. See spec of package Sem for full
3376 -- details on how we handle recording of check suppression.
3378 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
3383 In_Package_Spec : constant Boolean :=
3384 (Ekind (Current_Scope) = E_Package
3386 Ekind (Current_Scope) = E_Generic_Package)
3387 and then not In_Package_Body (Current_Scope);
3389 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
3390 -- Used to suppress a single check on the given entity
3392 --------------------------------
3393 -- Suppress_Unsuppress_Echeck --
3394 --------------------------------
3396 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
3397 ESR : constant Entity_Check_Suppress_Record :=
3400 Suppress => Suppress_Case);
3403 Set_Checks_May_Be_Suppressed (E);
3405 if In_Package_Spec then
3406 Global_Entity_Suppress.Append (ESR);
3408 Local_Entity_Suppress.Append (ESR);
3411 -- If this is a first subtype, and the base type is distinct,
3412 -- then also set the suppress flags on the base type.
3414 if Is_First_Subtype (E)
3415 and then Etype (E) /= E
3417 Suppress_Unsuppress_Echeck (Etype (E), C);
3419 end Suppress_Unsuppress_Echeck;
3421 -- Start of processing for Process_Suppress_Unsuppress
3424 -- Suppress/Unsuppress can appear as a configuration pragma,
3425 -- or in a declarative part or a package spec (RM 11.5(5))
3427 if not Is_Configuration_Pragma then
3428 Check_Is_In_Decl_Part_Or_Package_Spec;
3431 Check_At_Least_N_Arguments (1);
3432 Check_At_Most_N_Arguments (2);
3433 Check_No_Identifier (Arg1);
3434 Check_Arg_Is_Identifier (Arg1);
3436 if not Is_Check_Name (Chars (Expression (Arg1))) then
3438 ("argument of pragma% is not valid check name", Arg1);
3440 C := Get_Check_Id (Chars (Expression (Arg1)));
3443 if Arg_Count = 1 then
3445 -- Make an entry in the local scope suppress table. This is the
3446 -- table that directly shows the current value of the scope
3447 -- suppress check for any check id value.
3449 if C = All_Checks then
3450 for J in Scope_Suppress'Range loop
3451 Scope_Suppress (J) := Suppress_Case;
3454 Scope_Suppress (C) := Suppress_Case;
3457 -- Also make an entry in the Local_Entity_Suppress table. See
3458 -- extended description in the package spec of Sem for details.
3460 Local_Entity_Suppress.Append
3463 Suppress => Suppress_Case));
3465 -- Case of two arguments present, where the check is
3466 -- suppressed for a specified entity (given as the second
3467 -- argument of the pragma)
3470 Check_Optional_Identifier (Arg2, Name_On);
3471 E_Id := Expression (Arg2);
3474 if not Is_Entity_Name (E_Id) then
3476 ("second argument of pragma% must be entity name", Arg2);
3485 -- Enforce RM 11.5(7) which requires that for a pragma that
3486 -- appears within a package spec, the named entity must be
3487 -- within the package spec. We allow the package name itself
3488 -- to be mentioned since that makes sense, although it is not
3489 -- strictly allowed by 11.5(7).
3492 and then E /= Current_Scope
3493 and then Scope (E) /= Current_Scope
3496 ("entity in pragma% is not in package spec ('R'M 11.5(7))",
3500 -- Loop through homonyms. As noted below, in the case of a package
3501 -- spec, only homonyms within the package spec are considered.
3504 Suppress_Unsuppress_Echeck (E, C);
3506 if Is_Generic_Instance (E)
3507 and then Is_Subprogram (E)
3508 and then Present (Alias (E))
3510 Suppress_Unsuppress_Echeck (Alias (E), C);
3513 -- Move to next homonym
3518 -- If we are within a package specification, the
3519 -- pragma only applies to homonyms in the same scope.
3521 exit when In_Package_Spec
3522 and then Scope (E) /= Current_Scope;
3525 end Process_Suppress_Unsuppress;
3531 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
3533 if Is_Imported (E) then
3535 ("cannot export entity& that was previously imported", Arg);
3537 elsif Present (Address_Clause (E)) then
3539 ("cannot export entity& that has an address clause", Arg);
3542 Set_Is_Exported (E);
3544 -- Generate a reference for entity explicitly, because the
3545 -- identifier may be overloaded and name resolution will not
3548 Generate_Reference (E, Arg);
3550 -- Deal with exporting non-library level entity
3552 if not Is_Library_Level_Entity (E) then
3554 -- Not allowed at all for subprograms
3556 if Is_Subprogram (E) then
3557 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
3559 -- Otherwise set public and statically allocated
3563 Set_Is_Statically_Allocated (E);
3565 -- Warn if the corresponding W flag is set and the pragma
3566 -- comes from source. The latter may not be true e.g. on
3567 -- VMS where we expand export pragmas for exception codes
3568 -- associated with imported or exported exceptions. We do
3569 -- not want to generate a warning for something that the
3570 -- user did not write.
3572 if Warn_On_Export_Import
3573 and then Comes_From_Source (Arg)
3576 ("?& has been made static as a result of Export", Arg, E);
3578 ("\this usage is non-standard and non-portable", Arg);
3583 if Warn_On_Export_Import and then Is_Type (E) then
3585 ("exporting a type has no effect?", Arg, E);
3588 if Warn_On_Export_Import and Inside_A_Generic then
3590 ("all instances of& will have the same external name?", Arg, E);
3594 ----------------------------------------------
3595 -- Set_Extended_Import_Export_External_Name --
3596 ----------------------------------------------
3598 procedure Set_Extended_Import_Export_External_Name
3599 (Internal_Ent : Entity_Id;
3600 Arg_External : Node_Id)
3602 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
3606 if No (Arg_External) then
3609 elsif Nkind (Arg_External) = N_String_Literal then
3610 if String_Length (Strval (Arg_External)) = 0 then
3613 New_Name := Adjust_External_Name_Case (Arg_External);
3616 elsif Nkind (Arg_External) = N_Identifier then
3617 New_Name := Get_Default_External_Name (Arg_External);
3621 ("incorrect form for External parameter for pragma%",
3625 -- If we already have an external name set (by a prior normal
3626 -- Import or Export pragma), then the external names must match
3628 if Present (Interface_Name (Internal_Ent)) then
3630 S1 : constant String_Id := Strval (Old_Name);
3631 S2 : constant String_Id := Strval (New_Name);
3634 -- Called if names do not match
3636 procedure Mismatch is
3638 Error_Msg_Sloc := Sloc (Old_Name);
3640 ("external name does not match that given #",
3645 if String_Length (S1) /= String_Length (S2) then
3649 for J in 1 .. String_Length (S1) loop
3650 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
3657 -- Otherwise set the given name
3660 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
3663 end Set_Extended_Import_Export_External_Name;
3669 procedure Set_Imported (E : Entity_Id) is
3671 Error_Msg_Sloc := Sloc (E);
3673 if Is_Exported (E) or else Is_Imported (E) then
3674 Error_Msg_NE ("import of& declared# not allowed", N, E);
3676 if Is_Exported (E) then
3677 Error_Msg_N ("\entity was previously exported", N);
3679 Error_Msg_N ("\entity was previously imported", N);
3682 Error_Pragma ("\(pragma% applies to all previous entities)");
3685 Set_Is_Imported (E);
3687 -- If the entity is an object that is not at the library
3688 -- level, then it is statically allocated. We do not worry
3689 -- about objects with address clauses in this context since
3690 -- they are not really imported in the linker sense.
3693 and then not Is_Library_Level_Entity (E)
3694 and then No (Address_Clause (E))
3696 Set_Is_Statically_Allocated (E);
3701 -------------------------
3702 -- Set_Mechanism_Value --
3703 -------------------------
3705 -- Note: the mechanism name has not been analyzed (and cannot indeed
3706 -- be analyzed, since it is semantic nonsense), so we get it in the
3707 -- exact form created by the parser.
3709 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
3713 procedure Bad_Class;
3714 -- Signal bad descriptor class name
3716 procedure Bad_Mechanism;
3717 -- Signal bad mechanism name
3719 procedure Bad_Class is
3721 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
3724 procedure Bad_Mechanism is
3726 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
3729 -- Start of processing for Set_Mechanism_Value
3732 if Mechanism (Ent) /= Default_Mechanism then
3734 ("mechanism for & has already been set", Mech_Name, Ent);
3737 -- MECHANISM_NAME ::= value | reference | descriptor
3739 if Nkind (Mech_Name) = N_Identifier then
3740 if Chars (Mech_Name) = Name_Value then
3741 Set_Mechanism (Ent, By_Copy);
3744 elsif Chars (Mech_Name) = Name_Reference then
3745 Set_Mechanism (Ent, By_Reference);
3748 elsif Chars (Mech_Name) = Name_Descriptor then
3749 Check_VMS (Mech_Name);
3750 Set_Mechanism (Ent, By_Descriptor);
3753 elsif Chars (Mech_Name) = Name_Copy then
3755 ("bad mechanism name, Value assumed", Mech_Name);
3761 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
3762 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3764 -- Note: this form is parsed as an indexed component
3766 elsif Nkind (Mech_Name) = N_Indexed_Component then
3767 Class := First (Expressions (Mech_Name));
3769 if Nkind (Prefix (Mech_Name)) /= N_Identifier
3770 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
3771 or else Present (Next (Class))
3776 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
3777 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3779 -- Note: this form is parsed as a function call
3781 elsif Nkind (Mech_Name) = N_Function_Call then
3783 Param := First (Parameter_Associations (Mech_Name));
3785 if Nkind (Name (Mech_Name)) /= N_Identifier
3786 or else Chars (Name (Mech_Name)) /= Name_Descriptor
3787 or else Present (Next (Param))
3788 or else No (Selector_Name (Param))
3789 or else Chars (Selector_Name (Param)) /= Name_Class
3793 Class := Explicit_Actual_Parameter (Param);
3800 -- Fall through here with Class set to descriptor class name
3802 Check_VMS (Mech_Name);
3804 if Nkind (Class) /= N_Identifier then
3807 elsif Chars (Class) = Name_UBS then
3808 Set_Mechanism (Ent, By_Descriptor_UBS);
3810 elsif Chars (Class) = Name_UBSB then
3811 Set_Mechanism (Ent, By_Descriptor_UBSB);
3813 elsif Chars (Class) = Name_UBA then
3814 Set_Mechanism (Ent, By_Descriptor_UBA);
3816 elsif Chars (Class) = Name_S then
3817 Set_Mechanism (Ent, By_Descriptor_S);
3819 elsif Chars (Class) = Name_SB then
3820 Set_Mechanism (Ent, By_Descriptor_SB);
3822 elsif Chars (Class) = Name_A then
3823 Set_Mechanism (Ent, By_Descriptor_A);
3825 elsif Chars (Class) = Name_NCA then
3826 Set_Mechanism (Ent, By_Descriptor_NCA);
3832 end Set_Mechanism_Value;
3834 -- Start of processing for Analyze_Pragma
3837 if not Is_Pragma_Name (Chars (N)) then
3838 if Warn_On_Unrecognized_Pragma then
3839 Error_Pragma ("unrecognized pragma%!?");
3844 Prag_Id := Get_Pragma_Id (Chars (N));
3854 if Present (Pragma_Argument_Associations (N)) then
3855 Arg1 := First (Pragma_Argument_Associations (N));
3857 if Present (Arg1) then
3858 Arg2 := Next (Arg1);
3860 if Present (Arg2) then
3861 Arg3 := Next (Arg2);
3863 if Present (Arg3) then
3864 Arg4 := Next (Arg3);
3870 -- Count number of arguments
3877 while Present (Arg_Node) loop
3878 Arg_Count := Arg_Count + 1;
3883 -- An enumeration type defines the pragmas that are supported by the
3884 -- implementation. Get_Pragma_Id (in package Prag) transorms a name
3885 -- into the corresponding enumeration value for the following case.
3893 -- pragma Abort_Defer;
3895 when Pragma_Abort_Defer =>
3897 Check_Arg_Count (0);
3899 -- The only required semantic processing is to check the
3900 -- placement. This pragma must appear at the start of the
3901 -- statement sequence of a handled sequence of statements.
3903 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
3904 or else N /= First (Statements (Parent (N)))
3915 -- Note: this pragma also has some specific processing in Par.Prag
3916 -- because we want to set the Ada 83 mode switch during parsing.
3918 when Pragma_Ada_83 =>
3922 Check_Arg_Count (0);
3930 -- Note: this pragma also has some specific processing in Par.Prag
3931 -- because we want to set the Ada 83 mode switch during parsing.
3933 when Pragma_Ada_95 =>
3937 Check_Arg_Count (0);
3939 ----------------------
3940 -- All_Calls_Remote --
3941 ----------------------
3943 -- pragma All_Calls_Remote [(library_package_NAME)];
3945 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
3946 Lib_Entity : Entity_Id;
3949 Check_Ada_83_Warning;
3950 Check_Valid_Library_Unit_Pragma;
3952 if Nkind (N) = N_Null_Statement then
3956 Lib_Entity := Find_Lib_Unit_Name;
3958 -- This pragma should only apply to a RCI unit (RM E.2.3(23)).
3960 if Present (Lib_Entity)
3961 and then not Debug_Flag_U
3963 if not Is_Remote_Call_Interface (Lib_Entity) then
3964 Error_Pragma ("pragma% only apply to rci unit");
3966 -- Set flag for entity of the library unit
3969 Set_Has_All_Calls_Remote (Lib_Entity);
3973 end All_Calls_Remote;
3979 -- pragma Annotate (IDENTIFIER {, ARG});
3980 -- ARG ::= NAME | EXPRESSION
3982 when Pragma_Annotate => Annotate : begin
3984 Check_At_Least_N_Arguments (1);
3985 Check_Arg_Is_Identifier (Arg1);
3988 Arg : Node_Id := Arg2;
3992 while Present (Arg) loop
3993 Exp := Expression (Arg);
3996 if Is_Entity_Name (Exp) then
3999 elsif Nkind (Exp) = N_String_Literal then
4000 Resolve (Exp, Standard_String);
4002 elsif Is_Overloaded (Exp) then
4003 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
4018 -- pragma Assert (Boolean_EXPRESSION [, static_string_EXPRESSION]);
4020 when Pragma_Assert =>
4022 Check_No_Identifiers;
4024 if Arg_Count > 1 then
4025 Check_Arg_Count (2);
4026 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4029 -- If expansion is active and assertions are inactive, then
4030 -- we rewrite the Assertion as:
4032 -- if False and then condition then
4036 -- The reason we do this rewriting during semantic analysis
4037 -- rather than as part of normal expansion is that we cannot
4038 -- analyze and expand the code for the boolean expression
4039 -- directly, or it may cause insertion of actions that would
4040 -- escape the attempt to suppress the assertion code.
4042 if Expander_Active and not Assertions_Enabled then
4044 Make_If_Statement (Loc,
4047 Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
4048 Right_Opnd => Get_Pragma_Arg (Arg1)),
4049 Then_Statements => New_List (
4050 Make_Null_Statement (Loc))));
4054 -- Otherwise (if assertions are enabled, or if we are not
4055 -- operating with expansion active), then we just analyze
4056 -- and resolve the expression.
4059 Analyze_And_Resolve (Expression (Arg1), Any_Boolean);
4066 -- pragma AST_Entry (entry_IDENTIFIER);
4068 when Pragma_AST_Entry => AST_Entry : declare
4074 Check_Arg_Count (1);
4075 Check_No_Identifiers;
4076 Check_Arg_Is_Local_Name (Arg1);
4077 Ent := Entity (Expression (Arg1));
4079 -- Note: the implementation of the AST_Entry pragma could handle
4080 -- the entry family case fine, but for now we are consistent with
4081 -- the DEC rules, and do not allow the pragma, which of course
4082 -- has the effect of also forbidding the attribute.
4084 if Ekind (Ent) /= E_Entry then
4086 ("pragma% argument must be simple entry name", Arg1);
4088 elsif Is_AST_Entry (Ent) then
4090 ("duplicate % pragma for entry", Arg1);
4092 elsif Has_Homonym (Ent) then
4094 ("pragma% argument cannot specify overloaded entry", Arg1);
4098 FF : constant Entity_Id := First_Formal (Ent);
4101 if Present (FF) then
4102 if Present (Next_Formal (FF)) then
4104 ("entry for pragma% can have only one argument",
4107 elsif Parameter_Mode (FF) /= E_In_Parameter then
4109 ("entry parameter for pragma% must have mode IN",
4115 Set_Is_AST_Entry (Ent);
4123 -- pragma Asynchronous (LOCAL_NAME);
4125 when Pragma_Asynchronous => Asynchronous : declare
4133 procedure Process_Async_Pragma;
4134 -- Common processing for procedure and access-to-procedure case
4136 --------------------------
4137 -- Process_Async_Pragma --
4138 --------------------------
4140 procedure Process_Async_Pragma is
4142 if not Present (L) then
4143 Set_Is_Asynchronous (Nm);
4147 -- The formals should be of mode IN (RM E.4.1(6))
4150 while Present (S) loop
4151 Formal := Defining_Identifier (S);
4153 if Nkind (Formal) = N_Defining_Identifier
4154 and then Ekind (Formal) /= E_In_Parameter
4157 ("pragma% procedure can only have IN parameter",
4164 Set_Is_Asynchronous (Nm);
4165 end Process_Async_Pragma;
4167 -- Start of processing for pragma Asynchronous
4170 Check_Ada_83_Warning;
4171 Check_No_Identifiers;
4172 Check_Arg_Count (1);
4173 Check_Arg_Is_Local_Name (Arg1);
4175 if Debug_Flag_U then
4179 C_Ent := Cunit_Entity (Current_Sem_Unit);
4180 Analyze (Expression (Arg1));
4181 Nm := Entity (Expression (Arg1));
4183 if not Is_Remote_Call_Interface (C_Ent)
4184 and then not Is_Remote_Types (C_Ent)
4186 -- This pragma should only appear in an RCI or Remote Types
4187 -- unit (RM E.4.1(4))
4190 ("pragma% not in Remote_Call_Interface or " &
4191 "Remote_Types unit");
4194 if Ekind (Nm) = E_Procedure
4195 and then Nkind (Parent (Nm)) = N_Procedure_Specification
4197 if not Is_Remote_Call_Interface (Nm) then
4199 ("pragma% cannot be applied on non-remote procedure",
4203 L := Parameter_Specifications (Parent (Nm));
4204 Process_Async_Pragma;
4207 elsif Ekind (Nm) = E_Function then
4209 ("pragma% cannot be applied to function", Arg1);
4211 elsif Ekind (Nm) = E_Record_Type
4212 and then Present (Corresponding_Remote_Type (Nm))
4214 N := Declaration_Node (Corresponding_Remote_Type (Nm));
4216 if Nkind (N) = N_Full_Type_Declaration
4217 and then Nkind (Type_Definition (N)) =
4218 N_Access_Procedure_Definition
4220 L := Parameter_Specifications (Type_Definition (N));
4221 Process_Async_Pragma;
4225 ("pragma% cannot reference access-to-function type",
4229 -- Only other possibility is Access-to-class-wide type
4231 elsif Is_Access_Type (Nm)
4232 and then Is_Class_Wide_Type (Designated_Type (Nm))
4234 Check_First_Subtype (Arg1);
4235 Set_Is_Asynchronous (Nm);
4236 if Expander_Active then
4237 RACW_Type_Is_Asynchronous (Nm);
4241 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
4249 -- pragma Atomic (LOCAL_NAME);
4251 when Pragma_Atomic =>
4252 Process_Atomic_Shared_Volatile;
4254 -----------------------
4255 -- Atomic_Components --
4256 -----------------------
4258 -- pragma Atomic_Components (array_LOCAL_NAME);
4260 -- This processing is shared by Volatile_Components
4262 when Pragma_Atomic_Components |
4263 Pragma_Volatile_Components =>
4265 Atomic_Components : declare
4272 Check_Ada_83_Warning;
4273 Check_No_Identifiers;
4274 Check_Arg_Count (1);
4275 Check_Arg_Is_Local_Name (Arg1);
4276 E_Id := Expression (Arg1);
4278 if Etype (E_Id) = Any_Type then
4284 if Rep_Item_Too_Early (E, N)
4286 Rep_Item_Too_Late (E, N)
4291 D := Declaration_Node (E);
4294 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
4296 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
4297 and then Nkind (D) = N_Object_Declaration
4298 and then Nkind (Object_Definition (D)) =
4299 N_Constrained_Array_Definition)
4301 -- The flag is set on the object, or on the base type
4303 if Nkind (D) /= N_Object_Declaration then
4307 Set_Has_Volatile_Components (E);
4309 if Prag_Id = Pragma_Atomic_Components then
4310 Set_Has_Atomic_Components (E);
4312 if Is_Packed (E) then
4313 Set_Is_Packed (E, False);
4316 ("?Pack canceled, cannot pack atomic components",
4322 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
4324 end Atomic_Components;
4326 --------------------
4327 -- Attach_Handler --
4328 --------------------
4330 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
4332 when Pragma_Attach_Handler =>
4333 Check_Ada_83_Warning;
4334 Check_No_Identifiers;
4335 Check_Arg_Count (2);
4337 if No_Run_Time_Mode then
4338 Error_Msg_CRT ("Attach_Handler pragma", N);
4340 Check_Interrupt_Or_Attach_Handler;
4342 -- The expression that designates the attribute may
4343 -- depend on a discriminant, and is therefore a per-
4344 -- object expression, to be expanded in the init proc.
4345 -- If expansion is enabled, perform semantic checks
4348 if Expander_Active then
4350 Temp : constant Node_Id :=
4351 New_Copy_Tree (Expression (Arg2));
4353 Set_Parent (Temp, N);
4354 Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
4358 Analyze (Expression (Arg2));
4359 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
4362 Process_Interrupt_Or_Attach_Handler;
4365 --------------------
4366 -- C_Pass_By_Copy --
4367 --------------------
4369 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
4371 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
4377 Check_Valid_Configuration_Pragma;
4378 Check_Arg_Count (1);
4379 Check_Optional_Identifier (Arg1, "max_size");
4381 Arg := Expression (Arg1);
4382 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
4384 Val := Expr_Value (Arg);
4388 ("maximum size for pragma% must be positive", Arg1);
4390 elsif UI_Is_In_Int_Range (Val) then
4391 Default_C_Record_Mechanism := UI_To_Int (Val);
4393 -- If a giant value is given, Int'Last will do well enough.
4394 -- If sometime someone complains that a record larger than
4395 -- two gigabytes is not copied, we will worry about it then!
4398 Default_C_Record_Mechanism := Mechanism_Type'Last;
4406 -- pragma Comment (static_string_EXPRESSION)
4408 -- Processing for pragma Comment shares the circuitry for
4409 -- pragma Ident. The only differences are that Ident enforces
4410 -- a limit of 31 characters on its argument, and also enforces
4411 -- limitations on placement for DEC compatibility. Pragma
4412 -- Comment shares neither of these restrictions.
4418 -- pragma Common_Object (
4419 -- [Internal =>] LOCAL_NAME,
4420 -- [, [External =>] EXTERNAL_SYMBOL]
4421 -- [, [Size =>] EXTERNAL_SYMBOL]);
4423 -- Processing for this pragma is shared with Psect_Object
4425 --------------------------
4426 -- Compile_Time_Warning --
4427 --------------------------
4429 -- pragma Compile_Time_Warning
4430 -- (boolean_EXPRESSION, static_string_EXPRESSION);
4432 when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
4433 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
4437 Check_Arg_Count (2);
4438 Check_No_Identifiers;
4439 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4440 Analyze_And_Resolve (Arg1x, Standard_Boolean);
4442 if Compile_Time_Known_Value (Arg1x) then
4443 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
4444 String_To_Name_Buffer (Strval (Get_Pragma_Arg (Arg2)));
4445 Add_Char_To_Name_Buffer ('?');
4448 Msg : String (1 .. Name_Len) :=
4449 Name_Buffer (1 .. Name_Len);
4454 -- This loop looks for multiple lines separated by
4455 -- ASCII.LF and breaks them into continuation error
4456 -- messages marked with the usual back slash.
4459 for S in 2 .. Msg'Length - 1 loop
4460 if Msg (S) = ASCII.LF then
4462 Error_Msg_N (Msg (B .. S), Arg1);
4468 Error_Msg_N (Msg (B .. Msg'Length), Arg1);
4472 end Compile_Time_Warning;
4474 ----------------------------
4475 -- Complex_Representation --
4476 ----------------------------
4478 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
4480 when Pragma_Complex_Representation => Complex_Representation : declare
4487 Check_Arg_Count (1);
4488 Check_Optional_Identifier (Arg1, Name_Entity);
4489 Check_Arg_Is_Local_Name (Arg1);
4490 E_Id := Expression (Arg1);
4492 if Etype (E_Id) = Any_Type then
4498 if not Is_Record_Type (E) then
4500 ("argument for pragma% must be record type", Arg1);
4503 Ent := First_Entity (E);
4506 or else No (Next_Entity (Ent))
4507 or else Present (Next_Entity (Next_Entity (Ent)))
4508 or else not Is_Floating_Point_Type (Etype (Ent))
4509 or else Etype (Ent) /= Etype (Next_Entity (Ent))
4512 ("record for pragma% must have two fields of same fpt type",
4516 Set_Has_Complex_Representation (Base_Type (E));
4518 end Complex_Representation;
4520 -------------------------
4521 -- Component_Alignment --
4522 -------------------------
4524 -- pragma Component_Alignment (
4525 -- [Form =>] ALIGNMENT_CHOICE
4526 -- [, [Name =>] type_LOCAL_NAME]);
4528 -- ALIGNMENT_CHOICE ::=
4530 -- | Component_Size_4
4534 when Pragma_Component_Alignment => Component_AlignmentP : declare
4535 Args : Args_List (1 .. 2);
4536 Names : constant Name_List (1 .. 2) := (
4540 Form : Node_Id renames Args (1);
4541 Name : Node_Id renames Args (2);
4543 Atype : Component_Alignment_Kind;
4548 Gather_Associations (Names, Args);
4551 Error_Pragma ("missing Form argument for pragma%");
4554 Check_Arg_Is_Identifier (Form);
4556 -- Get proper alignment, note that Default = Component_Size
4557 -- on all machines we have so far, and we want to set this
4558 -- value rather than the default value to indicate that it
4559 -- has been explicitly set (and thus will not get overridden
4560 -- by the default component alignment for the current scope)
4562 if Chars (Form) = Name_Component_Size then
4563 Atype := Calign_Component_Size;
4565 elsif Chars (Form) = Name_Component_Size_4 then
4566 Atype := Calign_Component_Size_4;
4568 elsif Chars (Form) = Name_Default then
4569 Atype := Calign_Component_Size;
4571 elsif Chars (Form) = Name_Storage_Unit then
4572 Atype := Calign_Storage_Unit;
4576 ("invalid Form parameter for pragma%", Form);
4579 -- Case with no name, supplied, affects scope table entry
4583 (Scope_Stack.Last).Component_Alignment_Default := Atype;
4585 -- Case of name supplied
4588 Check_Arg_Is_Local_Name (Name);
4590 Typ := Entity (Name);
4593 or else Rep_Item_Too_Early (Typ, N)
4597 Typ := Underlying_Type (Typ);
4600 if not Is_Record_Type (Typ)
4601 and then not Is_Array_Type (Typ)
4604 ("Name parameter of pragma% must identify record or " &
4605 "array type", Name);
4608 -- An explicit Component_Alignment pragma overrides an
4609 -- implicit pragma Pack, but not an explicit one.
4611 if not Has_Pragma_Pack (Base_Type (Typ)) then
4612 Set_Is_Packed (Base_Type (Typ), False);
4613 Set_Component_Alignment (Base_Type (Typ), Atype);
4616 end Component_AlignmentP;
4622 -- pragma Controlled (first_subtype_LOCAL_NAME);
4624 when Pragma_Controlled => Controlled : declare
4628 Check_No_Identifiers;
4629 Check_Arg_Count (1);
4630 Check_Arg_Is_Local_Name (Arg1);
4631 Arg := Expression (Arg1);
4633 if not Is_Entity_Name (Arg)
4634 or else not Is_Access_Type (Entity (Arg))
4636 Error_Pragma_Arg ("pragma% requires access type", Arg1);
4638 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
4646 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
4647 -- [Entity =>] LOCAL_NAME);
4649 when Pragma_Convention => Convention : declare
4653 Check_Ada_83_Warning;
4654 Check_Arg_Count (2);
4655 Process_Convention (C, E);
4658 ---------------------------
4659 -- Convention_Identifier --
4660 ---------------------------
4662 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
4663 -- [Convention =>] convention_IDENTIFIER);
4665 when Pragma_Convention_Identifier => Convention_Identifier : declare
4671 Check_Arg_Count (2);
4672 Check_Optional_Identifier (Arg1, Name_Name);
4673 Check_Optional_Identifier (Arg2, Name_Convention);
4674 Check_Arg_Is_Identifier (Arg1);
4675 Check_Arg_Is_Identifier (Arg1);
4676 Idnam := Chars (Expression (Arg1));
4677 Cname := Chars (Expression (Arg2));
4679 if Is_Convention_Name (Cname) then
4680 Record_Convention_Identifier
4681 (Idnam, Get_Convention_Id (Cname));
4684 ("second arg for % pragma must be convention", Arg2);
4686 end Convention_Identifier;
4692 -- pragma CPP_Class ([Entity =>] local_NAME)
4694 when Pragma_CPP_Class => CPP_Class : declare
4697 Default_DTC : Entity_Id := Empty;
4698 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4704 Check_Arg_Count (1);
4705 Check_Optional_Identifier (Arg1, Name_Entity);
4706 Check_Arg_Is_Local_Name (Arg1);
4708 Arg := Expression (Arg1);
4711 if Etype (Arg) = Any_Type then
4715 if not Is_Entity_Name (Arg)
4716 or else not Is_Type (Entity (Arg))
4718 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
4721 Typ := Entity (Arg);
4723 if not Is_Record_Type (Typ) then
4724 Error_Pragma_Arg ("pragma% applicable to a record, "
4725 & "tagged record or record extension", Arg1);
4728 Default_DTC := First_Component (Typ);
4729 while Present (Default_DTC)
4730 and then Etype (Default_DTC) /= VTP_Type
4732 Next_Component (Default_DTC);
4735 -- Case of non tagged type
4737 if not Is_Tagged_Type (Typ) then
4738 Set_Is_CPP_Class (Typ);
4740 if Present (Default_DTC) then
4742 ("only tagged records can contain vtable pointers", Arg1);
4745 -- Case of tagged type with no vtable ptr
4747 -- What is test for Typ = Root_Typ (Typ) about here ???
4749 elsif Is_Tagged_Type (Typ)
4750 and then Typ = Root_Type (Typ)
4751 and then No (Default_DTC)
4754 ("a cpp_class must contain a vtable pointer", Arg1);
4756 -- Tagged type that has a vtable ptr
4758 elsif Present (Default_DTC) then
4759 Set_Is_CPP_Class (Typ);
4760 Set_Is_Limited_Record (Typ);
4761 Set_Is_Tag (Default_DTC);
4762 Set_DT_Entry_Count (Default_DTC, No_Uint);
4764 -- Since a CPP type has no direct link to its associated tag
4765 -- most tags checks cannot be performed
4767 Set_Kill_Tag_Checks (Typ);
4768 Set_Kill_Tag_Checks (Class_Wide_Type (Typ));
4770 -- Get rid of the _tag component when there was one.
4771 -- It is only useful for regular tagged types
4773 if Expander_Active and then Typ = Root_Type (Typ) then
4775 Tag_C := Tag_Component (Typ);
4776 C := First_Entity (Typ);
4779 Set_First_Entity (Typ, Next_Entity (Tag_C));
4782 while Next_Entity (C) /= Tag_C loop
4786 Set_Next_Entity (C, Next_Entity (Tag_C));
4792 ---------------------
4793 -- CPP_Constructor --
4794 ---------------------
4796 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME);
4798 when Pragma_CPP_Constructor => CPP_Constructor : declare
4804 Check_Arg_Count (1);
4805 Check_Optional_Identifier (Arg1, Name_Entity);
4806 Check_Arg_Is_Local_Name (Arg1);
4808 Id := Expression (Arg1);
4809 Find_Program_Unit_Name (Id);
4811 -- If we did not find the name, we are done
4813 if Etype (Id) = Any_Type then
4817 Def_Id := Entity (Id);
4819 if Ekind (Def_Id) = E_Function
4820 and then Is_Class_Wide_Type (Etype (Def_Id))
4821 and then Is_CPP_Class (Etype (Etype (Def_Id)))
4823 -- What the heck is this??? this pragma allows only 1 arg
4825 if Arg_Count >= 2 then
4826 Check_At_Most_N_Arguments (3);
4827 Process_Interface_Name (Def_Id, Arg2, Arg3);
4830 if No (Parameter_Specifications (Parent (Def_Id))) then
4831 Set_Has_Completion (Def_Id);
4832 Set_Is_Constructor (Def_Id);
4835 ("non-default constructors not implemented", Arg1);
4840 ("pragma% requires function returning a 'C'P'P_Class type",
4843 end CPP_Constructor;
4849 -- pragma CPP_Virtual
4850 -- [Entity =>] LOCAL_NAME
4851 -- [ [Vtable_Ptr =>] LOCAL_NAME,
4852 -- [Position =>] static_integer_EXPRESSION]);
4854 when Pragma_CPP_Virtual => CPP_Virtual : declare
4858 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4865 if Arg_Count = 3 then
4866 Check_Optional_Identifier (Arg2, "vtable_ptr");
4868 -- We allow Entry_Count as well as Position for the third
4869 -- parameter for back compatibility with versions of GNAT
4870 -- before version 3.12. The documentation has always said
4871 -- Position, but the code up to 3.12 said Entry_Count.
4873 if Chars (Arg3) /= Name_Position then
4874 Check_Optional_Identifier (Arg3, "entry_count");
4878 Check_Arg_Count (1);
4881 Check_Optional_Identifier (Arg1, Name_Entity);
4882 Check_Arg_Is_Local_Name (Arg1);
4884 -- First argument must be a subprogram name
4886 Arg := Expression (Arg1);
4887 Find_Program_Unit_Name (Arg);
4889 if Etype (Arg) = Any_Type then
4892 Subp := Entity (Arg);
4895 if not (Is_Subprogram (Subp)
4896 and then Is_Dispatching_Operation (Subp))
4899 ("pragma% must reference a primitive operation", Arg1);
4902 Typ := Find_Dispatching_Type (Subp);
4904 -- If only one Argument defaults are :
4905 -- . DTC_Entity is the default Vtable pointer
4906 -- . DT_Position will be set at the freezing point
4908 if Arg_Count = 1 then
4909 Set_DTC_Entity (Subp, Tag_Component (Typ));
4913 -- Second argument is a component name of type Vtable_Ptr
4915 Arg := Expression (Arg2);
4917 if Nkind (Arg) /= N_Identifier then
4918 Error_Msg_NE ("must be a& component name", Arg, Typ);
4922 DTC := First_Component (Typ);
4923 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
4924 Next_Component (DTC);
4928 Error_Msg_NE ("must be a& component name", Arg, Typ);
4931 elsif Etype (DTC) /= VTP_Type then
4932 Wrong_Type (Arg, VTP_Type);
4936 -- Third argument is an integer (DT_Position)
4938 Arg := Expression (Arg3);
4939 Analyze_And_Resolve (Arg, Any_Integer);
4941 if not Is_Static_Expression (Arg) then
4942 Flag_Non_Static_Expr
4943 ("third argument of pragma CPP_Virtual must be static!",
4948 V := Expr_Value (Expression (Arg3));
4952 ("third argument of pragma% must be positive",
4956 Set_DTC_Entity (Subp, DTC);
4957 Set_DT_Position (Subp, V);
4966 -- pragma CPP_Vtable (
4967 -- [Entity =>] LOCAL_NAME
4968 -- [Vtable_Ptr =>] LOCAL_NAME,
4969 -- [Entry_Count =>] static_integer_EXPRESSION);
4971 when Pragma_CPP_Vtable => CPP_Vtable : declare
4974 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4981 Check_Arg_Count (3);
4982 Check_Optional_Identifier (Arg1, Name_Entity);
4983 Check_Optional_Identifier (Arg2, "vtable_ptr");
4984 Check_Optional_Identifier (Arg3, "entry_count");
4985 Check_Arg_Is_Local_Name (Arg1);
4987 -- First argument is a record type name
4989 Arg := Expression (Arg1);
4992 if Etype (Arg) = Any_Type then
4995 Typ := Entity (Arg);
4998 if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
4999 Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
5002 -- Second argument is a component name of type Vtable_Ptr
5004 Arg := Expression (Arg2);
5006 if Nkind (Arg) /= N_Identifier then
5007 Error_Msg_NE ("must be a& component name", Arg, Typ);
5011 DTC := First_Component (Typ);
5012 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
5013 Next_Component (DTC);
5017 Error_Msg_NE ("must be a& component name", Arg, Typ);
5020 elsif Etype (DTC) /= VTP_Type then
5021 Wrong_Type (DTC, VTP_Type);
5024 -- If it is the first pragma Vtable, This becomes the default tag
5026 elsif (not Is_Tag (DTC))
5027 and then DT_Entry_Count (Tag_Component (Typ)) = No_Uint
5029 Set_Is_Tag (Tag_Component (Typ), False);
5030 Set_Is_Tag (DTC, True);
5031 Set_DT_Entry_Count (DTC, No_Uint);
5034 -- Those pragmas must appear before any primitive operation
5035 -- definition (except inherited ones) otherwise the default
5038 Elmt := First_Elmt (Primitive_Operations (Typ));
5039 while Present (Elmt) loop
5040 if No (Alias (Node (Elmt))) then
5041 Error_Msg_Sloc := Sloc (Node (Elmt));
5043 ("pragma% must appear before this primitive operation");
5049 -- Third argument is an integer (DT_Entry_Count)
5051 Arg := Expression (Arg3);
5052 Analyze_And_Resolve (Arg, Any_Integer);
5054 if not Is_Static_Expression (Arg) then
5055 Flag_Non_Static_Expr
5056 ("entry count for pragma CPP_Vtable must be a static " &
5057 "expression!", Arg3);
5061 V := Expr_Value (Expression (Arg3));
5065 ("entry count for pragma% must be positive", Arg3);
5067 Set_DT_Entry_Count (DTC, V);
5076 -- pragma Debug (PROCEDURE_CALL_STATEMENT);
5078 when Pragma_Debug => Debug : begin
5081 -- If assertions are enabled, and we are expanding code, then
5082 -- we rewrite the pragma with its corresponding procedure call
5083 -- and then analyze the call.
5085 if Assertions_Enabled and Expander_Active then
5086 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5089 -- Otherwise we work a bit to get a tree that makes sense
5090 -- for ASIS purposes, namely a pragma with an analyzed
5091 -- argument that looks like a procedure call.
5094 Expander_Mode_Save_And_Set (False);
5095 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5099 Chars => Name_Debug,
5100 Pragma_Argument_Associations =>
5101 New_List (Relocate_Node (N))));
5102 Expander_Mode_Restore;
5110 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
5112 when Pragma_Discard_Names => Discard_Names : declare
5117 Check_Ada_83_Warning;
5119 -- Deal with configuration pragma case
5121 if Arg_Count = 0 and then Is_Configuration_Pragma then
5122 Global_Discard_Names := True;
5125 -- Otherwise, check correct appropriate context
5128 Check_Is_In_Decl_Part_Or_Package_Spec;
5130 if Arg_Count = 0 then
5132 -- If there is no parameter, then from now on this pragma
5133 -- applies to any enumeration, exception or tagged type
5134 -- defined in the current declarative part.
5136 Set_Discard_Names (Current_Scope);
5140 Check_Arg_Count (1);
5141 Check_Optional_Identifier (Arg1, Name_On);
5142 Check_Arg_Is_Local_Name (Arg1);
5143 E_Id := Expression (Arg1);
5145 if Etype (E_Id) = Any_Type then
5151 if (Is_First_Subtype (E)
5152 and then (Is_Enumeration_Type (E)
5153 or else Is_Tagged_Type (E)))
5154 or else Ekind (E) = E_Exception
5156 Set_Discard_Names (E);
5159 ("inappropriate entity for pragma%", Arg1);
5169 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
5171 when Pragma_Elaborate => Elaborate : declare
5173 Parent_Node : Node_Id;
5178 -- Pragma must be in context items list of a compilation unit
5180 if not Is_List_Member (N) then
5185 Plist := List_Containing (N);
5186 Parent_Node := Parent (Plist);
5188 if Parent_Node = Empty
5189 or else Nkind (Parent_Node) /= N_Compilation_Unit
5190 or else Context_Items (Parent_Node) /= Plist
5197 -- Must be at least one argument
5199 if Arg_Count = 0 then
5200 Error_Pragma ("pragma% requires at least one argument");
5203 -- In Ada 83 mode, there can be no items following it in the
5204 -- context list except other pragmas and implicit with clauses
5205 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
5206 -- placement rule does not apply.
5208 if Ada_83 and then Comes_From_Source (N) then
5211 while Present (Citem) loop
5212 if Nkind (Citem) = N_Pragma
5213 or else (Nkind (Citem) = N_With_Clause
5214 and then Implicit_With (Citem))
5219 ("(Ada 83) pragma% must be at end of context clause");
5226 -- Finally, the arguments must all be units mentioned in a with
5227 -- clause in the same context clause. Note we already checked
5228 -- (in Par.Prag) that the arguments are either identifiers or
5231 Outer : while Present (Arg) loop
5232 Citem := First (Plist);
5234 Inner : while Citem /= N loop
5235 if Nkind (Citem) = N_With_Clause
5236 and then Same_Name (Name (Citem), Expression (Arg))
5238 Set_Elaborate_Present (Citem, True);
5239 Set_Unit_Name (Expression (Arg), Name (Citem));
5240 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5249 ("argument of pragma% is not with'ed unit", Arg);
5255 -- Give a warning if operating in static mode with -gnatwl
5256 -- (elaboration warnings eanbled) switch set.
5258 if Elab_Warnings and not Dynamic_Elaboration_Checks then
5260 ("?use of pragma Elaborate may not be safe", N);
5262 ("?use pragma Elaborate_All instead if possible", N);
5270 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
5272 when Pragma_Elaborate_All => Elaborate_All : declare
5274 Parent_Node : Node_Id;
5279 Check_Ada_83_Warning;
5281 -- Pragma must be in context items list of a compilation unit
5283 if not Is_List_Member (N) then
5288 Plist := List_Containing (N);
5289 Parent_Node := Parent (Plist);
5291 if Parent_Node = Empty
5292 or else Nkind (Parent_Node) /= N_Compilation_Unit
5293 or else Context_Items (Parent_Node) /= Plist
5300 -- Must be at least one argument
5302 if Arg_Count = 0 then
5303 Error_Pragma ("pragma% requires at least one argument");
5306 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
5307 -- have to appear at the end of the context clause, but may
5308 -- appear mixed in with other items, even in Ada 83 mode.
5310 -- Final check: the arguments must all be units mentioned in
5311 -- a with clause in the same context clause. Note that we
5312 -- already checked (in Par.Prag) that all the arguments are
5313 -- either identifiers or selected components.
5316 Outr : while Present (Arg) loop
5317 Citem := First (Plist);
5319 Innr : while Citem /= N loop
5320 if Nkind (Citem) = N_With_Clause
5321 and then Same_Name (Name (Citem), Expression (Arg))
5323 Set_Elaborate_All_Present (Citem, True);
5324 Set_Unit_Name (Expression (Arg), Name (Citem));
5325 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5333 Set_Error_Posted (N);
5335 ("argument of pragma% is not with'ed unit", Arg);
5342 --------------------
5343 -- Elaborate_Body --
5344 --------------------
5346 -- pragma Elaborate_Body [( library_unit_NAME )];
5348 when Pragma_Elaborate_Body => Elaborate_Body : declare
5349 Cunit_Node : Node_Id;
5350 Cunit_Ent : Entity_Id;
5353 Check_Ada_83_Warning;
5354 Check_Valid_Library_Unit_Pragma;
5356 if Nkind (N) = N_Null_Statement then
5360 Cunit_Node := Cunit (Current_Sem_Unit);
5361 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
5363 if Nkind (Unit (Cunit_Node)) = N_Package_Body
5365 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
5367 Error_Pragma ("pragma% must refer to a spec, not a body");
5369 Set_Body_Required (Cunit_Node, True);
5370 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
5372 -- If we are in dynamic elaboration mode, then we suppress
5373 -- elaboration warnings for the unit, since it is definitely
5374 -- fine NOT to do dynamic checks at the first level (and such
5375 -- checks will be suppressed because no elaboration boolean
5376 -- is created for Elaborate_Body packages).
5378 -- But in the static model of elaboration, Elaborate_Body is
5379 -- definitely NOT good enough to ensure elaboration safety on
5380 -- its own, since the body may WITH other units that are not
5381 -- safe from an elaboration point of view, so a client must
5382 -- still do an Elaborate_All on such units.
5384 -- Debug flag -gnatdD restores the old behavior of 3.13,
5385 -- where Elaborate_Body always suppressed elab warnings.
5387 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
5388 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
5393 ------------------------
5394 -- Elaboration_Checks --
5395 ------------------------
5397 -- pragma Elaboration_Checks (Static | Dynamic);
5399 when Pragma_Elaboration_Checks =>
5401 Check_Arg_Count (1);
5402 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
5403 Dynamic_Elaboration_Checks :=
5404 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
5410 -- pragma Eliminate (
5411 -- [Unit_Name =>] IDENTIFIER |
5412 -- SELECTED_COMPONENT
5413 -- [,[Entity =>] IDENTIFIER |
5414 -- SELECTED_COMPONENT |
5416 -- [,]OVERLOADING_RESOLUTION);
5418 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
5421 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
5424 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
5426 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
5427 -- Result_Type => result_SUBTYPE_NAME]
5429 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
5430 -- SUBTYPE_NAME ::= STRING_LITERAL
5432 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
5433 -- SOURCE_TRACE ::= STRING_LITERAL
5435 when Pragma_Eliminate => Eliminate : declare
5436 Args : Args_List (1 .. 5);
5437 Names : constant Name_List (1 .. 5) := (
5440 Name_Parameter_Types,
5442 Name_Source_Location);
5444 Unit_Name : Node_Id renames Args (1);
5445 Entity : Node_Id renames Args (2);
5446 Parameter_Types : Node_Id renames Args (3);
5447 Result_Type : Node_Id renames Args (4);
5448 Source_Location : Node_Id renames Args (5);
5452 Check_Valid_Configuration_Pragma;
5453 Gather_Associations (Names, Args);
5455 if No (Unit_Name) then
5456 Error_Pragma ("missing Unit_Name argument for pragma%");
5460 and then (Present (Parameter_Types)
5462 Present (Result_Type)
5464 Present (Source_Location))
5466 Error_Pragma ("missing Entity argument for pragma%");
5469 if (Present (Parameter_Types)
5471 Present (Result_Type))
5473 Present (Source_Location)
5476 ("parameter profile and source location can not " &
5477 "be used together in pragma%");
5480 Process_Eliminate_Pragma
5489 --------------------------
5490 -- Explicit_Overriding --
5491 --------------------------
5493 when Pragma_Explicit_Overriding =>
5494 Check_Valid_Configuration_Pragma;
5495 Check_Arg_Count (0);
5496 Explicit_Overriding := True;
5503 -- [ Convention =>] convention_IDENTIFIER,
5504 -- [ Entity =>] local_NAME
5505 -- [, [External_Name =>] static_string_EXPRESSION ]
5506 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5508 when Pragma_Export => Export : declare
5513 Check_Ada_83_Warning;
5514 Check_At_Least_N_Arguments (2);
5515 Check_At_Most_N_Arguments (4);
5516 Process_Convention (C, Def_Id);
5518 if Ekind (Def_Id) /= E_Constant then
5519 Note_Possible_Modification (Expression (Arg2));
5522 Process_Interface_Name (Def_Id, Arg3, Arg4);
5523 Set_Exported (Def_Id, Arg2);
5526 ----------------------
5527 -- Export_Exception --
5528 ----------------------
5530 -- pragma Export_Exception (
5531 -- [Internal =>] LOCAL_NAME,
5532 -- [, [External =>] EXTERNAL_SYMBOL,]
5533 -- [, [Form =>] Ada | VMS]
5534 -- [, [Code =>] static_integer_EXPRESSION]);
5536 when Pragma_Export_Exception => Export_Exception : declare
5537 Args : Args_List (1 .. 4);
5538 Names : constant Name_List (1 .. 4) := (
5544 Internal : Node_Id renames Args (1);
5545 External : Node_Id renames Args (2);
5546 Form : Node_Id renames Args (3);
5547 Code : Node_Id renames Args (4);
5550 if Inside_A_Generic then
5551 Error_Pragma ("pragma% cannot be used for generic entities");
5554 Gather_Associations (Names, Args);
5555 Process_Extended_Import_Export_Exception_Pragma (
5556 Arg_Internal => Internal,
5557 Arg_External => External,
5561 if not Is_VMS_Exception (Entity (Internal)) then
5562 Set_Exported (Entity (Internal), Internal);
5564 end Export_Exception;
5566 ---------------------
5567 -- Export_Function --
5568 ---------------------
5570 -- pragma Export_Function (
5571 -- [Internal =>] LOCAL_NAME,
5572 -- [, [External =>] EXTERNAL_SYMBOL,]
5573 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5574 -- [, [Result_Type =>] TYPE_DESIGNATOR]
5575 -- [, [Mechanism =>] MECHANISM]
5576 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
5578 -- EXTERNAL_SYMBOL ::=
5580 -- | static_string_EXPRESSION
5582 -- PARAMETER_TYPES ::=
5584 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5586 -- TYPE_DESIGNATOR ::=
5588 -- | subtype_Name ' Access
5592 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5594 -- MECHANISM_ASSOCIATION ::=
5595 -- [formal_parameter_NAME =>] MECHANISM_NAME
5597 -- MECHANISM_NAME ::=
5600 -- | Descriptor [([Class =>] CLASS_NAME)]
5602 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5604 when Pragma_Export_Function => Export_Function : declare
5605 Args : Args_List (1 .. 6);
5606 Names : constant Name_List (1 .. 6) := (
5609 Name_Parameter_Types,
5612 Name_Result_Mechanism);
5614 Internal : Node_Id renames Args (1);
5615 External : Node_Id renames Args (2);
5616 Parameter_Types : Node_Id renames Args (3);
5617 Result_Type : Node_Id renames Args (4);
5618 Mechanism : Node_Id renames Args (5);
5619 Result_Mechanism : Node_Id renames Args (6);
5623 Gather_Associations (Names, Args);
5624 Process_Extended_Import_Export_Subprogram_Pragma (
5625 Arg_Internal => Internal,
5626 Arg_External => External,
5627 Arg_Parameter_Types => Parameter_Types,
5628 Arg_Result_Type => Result_Type,
5629 Arg_Mechanism => Mechanism,
5630 Arg_Result_Mechanism => Result_Mechanism);
5631 end Export_Function;
5637 -- pragma Export_Object (
5638 -- [Internal =>] LOCAL_NAME,
5639 -- [, [External =>] EXTERNAL_SYMBOL]
5640 -- [, [Size =>] EXTERNAL_SYMBOL]);
5642 -- EXTERNAL_SYMBOL ::=
5644 -- | static_string_EXPRESSION
5646 -- PARAMETER_TYPES ::=
5648 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5650 -- TYPE_DESIGNATOR ::=
5652 -- | subtype_Name ' Access
5656 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5658 -- MECHANISM_ASSOCIATION ::=
5659 -- [formal_parameter_NAME =>] MECHANISM_NAME
5661 -- MECHANISM_NAME ::=
5664 -- | Descriptor [([Class =>] CLASS_NAME)]
5666 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5668 when Pragma_Export_Object => Export_Object : declare
5669 Args : Args_List (1 .. 3);
5670 Names : constant Name_List (1 .. 3) := (
5675 Internal : Node_Id renames Args (1);
5676 External : Node_Id renames Args (2);
5677 Size : Node_Id renames Args (3);
5681 Gather_Associations (Names, Args);
5682 Process_Extended_Import_Export_Object_Pragma (
5683 Arg_Internal => Internal,
5684 Arg_External => External,
5688 ----------------------
5689 -- Export_Procedure --
5690 ----------------------
5692 -- pragma Export_Procedure (
5693 -- [Internal =>] LOCAL_NAME,
5694 -- [, [External =>] EXTERNAL_SYMBOL,]
5695 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5696 -- [, [Mechanism =>] MECHANISM]);
5698 -- EXTERNAL_SYMBOL ::=
5700 -- | static_string_EXPRESSION
5702 -- PARAMETER_TYPES ::=
5704 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5706 -- TYPE_DESIGNATOR ::=
5708 -- | subtype_Name ' Access
5712 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5714 -- MECHANISM_ASSOCIATION ::=
5715 -- [formal_parameter_NAME =>] MECHANISM_NAME
5717 -- MECHANISM_NAME ::=
5720 -- | Descriptor [([Class =>] CLASS_NAME)]
5722 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5724 when Pragma_Export_Procedure => Export_Procedure : declare
5725 Args : Args_List (1 .. 4);
5726 Names : constant Name_List (1 .. 4) := (
5729 Name_Parameter_Types,
5732 Internal : Node_Id renames Args (1);
5733 External : Node_Id renames Args (2);
5734 Parameter_Types : Node_Id renames Args (3);
5735 Mechanism : Node_Id renames Args (4);
5739 Gather_Associations (Names, Args);
5740 Process_Extended_Import_Export_Subprogram_Pragma (
5741 Arg_Internal => Internal,
5742 Arg_External => External,
5743 Arg_Parameter_Types => Parameter_Types,
5744 Arg_Mechanism => Mechanism);
5745 end Export_Procedure;
5751 -- pragma Export_Value (
5752 -- [Value =>] static_integer_EXPRESSION,
5753 -- [Link_Name =>] static_string_EXPRESSION);
5755 when Pragma_Export_Value =>
5757 Check_Arg_Count (2);
5759 Check_Optional_Identifier (Arg1, Name_Value);
5760 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
5762 Check_Optional_Identifier (Arg2, Name_Link_Name);
5763 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
5765 -----------------------------
5766 -- Export_Valued_Procedure --
5767 -----------------------------
5769 -- pragma Export_Valued_Procedure (
5770 -- [Internal =>] LOCAL_NAME,
5771 -- [, [External =>] EXTERNAL_SYMBOL,]
5772 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5773 -- [, [Mechanism =>] MECHANISM]);
5775 -- EXTERNAL_SYMBOL ::=
5777 -- | static_string_EXPRESSION
5779 -- PARAMETER_TYPES ::=
5781 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5783 -- TYPE_DESIGNATOR ::=
5785 -- | subtype_Name ' Access
5789 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5791 -- MECHANISM_ASSOCIATION ::=
5792 -- [formal_parameter_NAME =>] MECHANISM_NAME
5794 -- MECHANISM_NAME ::=
5797 -- | Descriptor [([Class =>] CLASS_NAME)]
5799 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5801 when Pragma_Export_Valued_Procedure =>
5802 Export_Valued_Procedure : declare
5803 Args : Args_List (1 .. 4);
5804 Names : constant Name_List (1 .. 4) := (
5807 Name_Parameter_Types,
5810 Internal : Node_Id renames Args (1);
5811 External : Node_Id renames Args (2);
5812 Parameter_Types : Node_Id renames Args (3);
5813 Mechanism : Node_Id renames Args (4);
5817 Gather_Associations (Names, Args);
5818 Process_Extended_Import_Export_Subprogram_Pragma (
5819 Arg_Internal => Internal,
5820 Arg_External => External,
5821 Arg_Parameter_Types => Parameter_Types,
5822 Arg_Mechanism => Mechanism);
5823 end Export_Valued_Procedure;
5829 -- pragma Extend_System ([Name =>] Identifier);
5831 when Pragma_Extend_System => Extend_System : declare
5834 Check_Valid_Configuration_Pragma;
5835 Check_Arg_Count (1);
5836 Check_Optional_Identifier (Arg1, Name_Name);
5837 Check_Arg_Is_Identifier (Arg1);
5839 Get_Name_String (Chars (Expression (Arg1)));
5842 and then Name_Buffer (1 .. 4) = "aux_"
5844 if Present (System_Extend_Pragma_Arg) then
5845 if Chars (Expression (Arg1)) =
5846 Chars (Expression (System_Extend_Pragma_Arg))
5850 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
5851 Error_Pragma ("pragma% conflicts with that at#");
5855 System_Extend_Pragma_Arg := Arg1;
5857 if not GNAT_Mode then
5858 System_Extend_Unit := Arg1;
5862 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
5866 ------------------------
5867 -- Extensions_Allowed --
5868 ------------------------
5870 -- pragma Extensions_Allowed (ON | OFF);
5872 when Pragma_Extensions_Allowed =>
5874 Check_Arg_Count (1);
5875 Check_No_Identifiers;
5876 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5877 Extensions_Allowed := (Chars (Expression (Arg1)) = Name_On);
5883 -- pragma External (
5884 -- [ Convention =>] convention_IDENTIFIER,
5885 -- [ Entity =>] local_NAME
5886 -- [, [External_Name =>] static_string_EXPRESSION ]
5887 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5889 when Pragma_External => External : declare
5895 Check_At_Least_N_Arguments (2);
5896 Check_At_Most_N_Arguments (4);
5897 Process_Convention (C, Def_Id);
5898 Note_Possible_Modification (Expression (Arg2));
5899 Process_Interface_Name (Def_Id, Arg3, Arg4);
5900 Set_Exported (Def_Id, Arg2);
5903 --------------------------
5904 -- External_Name_Casing --
5905 --------------------------
5907 -- pragma External_Name_Casing (
5908 -- UPPERCASE | LOWERCASE
5909 -- [, AS_IS | UPPERCASE | LOWERCASE]);
5911 when Pragma_External_Name_Casing =>
5913 External_Name_Casing : declare
5916 Check_No_Identifiers;
5918 if Arg_Count = 2 then
5920 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
5922 case Chars (Get_Pragma_Arg (Arg2)) is
5924 Opt.External_Name_Exp_Casing := As_Is;
5926 when Name_Uppercase =>
5927 Opt.External_Name_Exp_Casing := Uppercase;
5929 when Name_Lowercase =>
5930 Opt.External_Name_Exp_Casing := Lowercase;
5937 Check_Arg_Count (1);
5940 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
5942 case Chars (Get_Pragma_Arg (Arg1)) is
5943 when Name_Uppercase =>
5944 Opt.External_Name_Imp_Casing := Uppercase;
5946 when Name_Lowercase =>
5947 Opt.External_Name_Imp_Casing := Lowercase;
5952 end External_Name_Casing;
5954 ---------------------------
5955 -- Finalize_Storage_Only --
5956 ---------------------------
5958 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
5960 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
5961 Assoc : constant Node_Id := Arg1;
5962 Type_Id : constant Node_Id := Expression (Assoc);
5966 Check_No_Identifiers;
5967 Check_Arg_Count (1);
5968 Check_Arg_Is_Local_Name (Arg1);
5970 Find_Type (Type_Id);
5971 Typ := Entity (Type_Id);
5974 or else Rep_Item_Too_Early (Typ, N)
5978 Typ := Underlying_Type (Typ);
5981 if not Is_Controlled (Typ) then
5982 Error_Pragma ("pragma% must specify controlled type");
5985 Check_First_Subtype (Arg1);
5987 if Finalize_Storage_Only (Typ) then
5988 Error_Pragma ("duplicate pragma%, only one allowed");
5990 elsif not Rep_Item_Too_Late (Typ, N) then
5991 Set_Finalize_Storage_Only (Base_Type (Typ), True);
5993 end Finalize_Storage;
5995 --------------------------
5996 -- Float_Representation --
5997 --------------------------
5999 -- pragma Float_Representation (VAX_Float | IEEE_Float);
6001 when Pragma_Float_Representation => Float_Representation : declare
6009 if Arg_Count = 1 then
6010 Check_Valid_Configuration_Pragma;
6012 Check_Arg_Count (2);
6013 Check_Optional_Identifier (Arg2, Name_Entity);
6014 Check_Arg_Is_Local_Name (Arg2);
6017 Check_No_Identifier (Arg1);
6018 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
6020 if not OpenVMS_On_Target then
6021 if Chars (Expression (Arg1)) = Name_VAX_Float then
6023 ("?pragma% ignored (applies only to Open'V'M'S)");
6029 -- One argument case
6031 if Arg_Count = 1 then
6033 if Chars (Expression (Arg1)) = Name_VAX_Float then
6035 if Opt.Float_Format = 'I' then
6036 Error_Pragma ("'I'E'E'E format previously specified");
6039 Opt.Float_Format := 'V';
6042 if Opt.Float_Format = 'V' then
6043 Error_Pragma ("'V'A'X format previously specified");
6046 Opt.Float_Format := 'I';
6049 Set_Standard_Fpt_Formats;
6051 -- Two argument case
6054 Argx := Get_Pragma_Arg (Arg2);
6056 if not Is_Entity_Name (Argx)
6057 or else not Is_Floating_Point_Type (Entity (Argx))
6060 ("second argument of% pragma must be floating-point type",
6064 Ent := Entity (Argx);
6065 Digs := UI_To_Int (Digits_Value (Ent));
6067 -- Two arguments, VAX_Float case
6069 if Chars (Expression (Arg1)) = Name_VAX_Float then
6072 when 6 => Set_F_Float (Ent);
6073 when 9 => Set_D_Float (Ent);
6074 when 15 => Set_G_Float (Ent);
6078 ("wrong digits value, must be 6,9 or 15", Arg2);
6081 -- Two arguments, IEEE_Float case
6085 when 6 => Set_IEEE_Short (Ent);
6086 when 15 => Set_IEEE_Long (Ent);
6090 ("wrong digits value, must be 6 or 15", Arg2);
6094 end Float_Representation;
6100 -- pragma Ident (static_string_EXPRESSION)
6102 -- Note: pragma Comment shares this processing. Pragma Comment
6103 -- is identical to Ident, except that the restriction of the
6104 -- argument to 31 characters and the placement restrictions
6105 -- are not enforced for pragma Comment.
6107 when Pragma_Ident | Pragma_Comment => Ident : declare
6112 Check_Arg_Count (1);
6113 Check_No_Identifiers;
6114 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
6116 -- For pragma Ident, preserve DEC compatibility by requiring
6117 -- the pragma to appear in a declarative part or package spec.
6119 if Prag_Id = Pragma_Ident then
6120 Check_Is_In_Decl_Part_Or_Package_Spec;
6123 Str := Expr_Value_S (Expression (Arg1));
6130 GP := Parent (Parent (N));
6132 if Nkind (GP) = N_Package_Declaration
6134 Nkind (GP) = N_Generic_Package_Declaration
6139 -- If we have a compilation unit, then record the ident
6140 -- value, checking for improper duplication.
6142 if Nkind (GP) = N_Compilation_Unit then
6143 CS := Ident_String (Current_Sem_Unit);
6145 if Present (CS) then
6147 -- For Ident, we do not permit multiple instances
6149 if Prag_Id = Pragma_Ident then
6150 Error_Pragma ("duplicate% pragma not permitted");
6152 -- For Comment, we concatenate the string, unless we
6153 -- want to preserve the tree structure for ASIS.
6155 elsif not ASIS_Mode then
6156 Start_String (Strval (CS));
6157 Store_String_Char (' ');
6158 Store_String_Chars (Strval (Str));
6159 Set_Strval (CS, End_String);
6163 -- In VMS, the effect of IDENT is achieved by passing
6164 -- IDENTIFICATION=name as a --for-linker switch.
6166 if OpenVMS_On_Target then
6169 ("--for-linker=IDENTIFICATION=");
6170 String_To_Name_Buffer (Strval (Str));
6171 Store_String_Chars (Name_Buffer (1 .. Name_Len));
6173 -- Only the last processed IDENT is saved. The main
6174 -- purpose is so an IDENT associated with a main
6175 -- procedure will be used in preference to an IDENT
6176 -- associated with a with'd package.
6178 Replace_Linker_Option_String
6179 (End_String, "--for-linker=IDENTIFICATION=");
6182 Set_Ident_String (Current_Sem_Unit, Str);
6185 -- For subunits, we just ignore the Ident, since in GNAT
6186 -- these are not separate object files, and hence not
6187 -- separate units in the unit table.
6189 elsif Nkind (GP) = N_Subunit then
6192 -- Otherwise we have a misplaced pragma Ident, but we ignore
6193 -- this if we are in an instantiation, since it comes from
6194 -- a generic, and has no relevance to the instantiation.
6196 elsif Prag_Id = Pragma_Ident then
6197 if Instantiation_Location (Loc) = No_Location then
6198 Error_Pragma ("pragma% only allowed at outer level");
6209 -- [ Convention =>] convention_IDENTIFIER,
6210 -- [ Entity =>] local_NAME
6211 -- [, [External_Name =>] static_string_EXPRESSION ]
6212 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6214 when Pragma_Import =>
6215 Check_Ada_83_Warning;
6216 Check_At_Least_N_Arguments (2);
6217 Check_At_Most_N_Arguments (4);
6218 Process_Import_Or_Interface;
6220 ----------------------
6221 -- Import_Exception --
6222 ----------------------
6224 -- pragma Import_Exception (
6225 -- [Internal =>] LOCAL_NAME,
6226 -- [, [External =>] EXTERNAL_SYMBOL,]
6227 -- [, [Form =>] Ada | VMS]
6228 -- [, [Code =>] static_integer_EXPRESSION]);
6230 when Pragma_Import_Exception => Import_Exception : declare
6231 Args : Args_List (1 .. 4);
6232 Names : constant Name_List (1 .. 4) := (
6238 Internal : Node_Id renames Args (1);
6239 External : Node_Id renames Args (2);
6240 Form : Node_Id renames Args (3);
6241 Code : Node_Id renames Args (4);
6244 Gather_Associations (Names, Args);
6246 if Present (External) and then Present (Code) then
6248 ("cannot give both External and Code options for pragma%");
6251 Process_Extended_Import_Export_Exception_Pragma (
6252 Arg_Internal => Internal,
6253 Arg_External => External,
6257 if not Is_VMS_Exception (Entity (Internal)) then
6258 Set_Imported (Entity (Internal));
6260 end Import_Exception;
6262 ---------------------
6263 -- Import_Function --
6264 ---------------------
6266 -- pragma Import_Function (
6267 -- [Internal =>] LOCAL_NAME,
6268 -- [, [External =>] EXTERNAL_SYMBOL]
6269 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6270 -- [, [Result_Type =>] SUBTYPE_MARK]
6271 -- [, [Mechanism =>] MECHANISM]
6272 -- [, [Result_Mechanism =>] MECHANISM_NAME]
6273 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6275 -- EXTERNAL_SYMBOL ::=
6277 -- | static_string_EXPRESSION
6279 -- PARAMETER_TYPES ::=
6281 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6283 -- TYPE_DESIGNATOR ::=
6285 -- | subtype_Name ' Access
6289 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6291 -- MECHANISM_ASSOCIATION ::=
6292 -- [formal_parameter_NAME =>] MECHANISM_NAME
6294 -- MECHANISM_NAME ::=
6297 -- | Descriptor [([Class =>] CLASS_NAME)]
6299 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6301 when Pragma_Import_Function => Import_Function : declare
6302 Args : Args_List (1 .. 7);
6303 Names : constant Name_List (1 .. 7) := (
6306 Name_Parameter_Types,
6309 Name_Result_Mechanism,
6310 Name_First_Optional_Parameter);
6312 Internal : Node_Id renames Args (1);
6313 External : Node_Id renames Args (2);
6314 Parameter_Types : Node_Id renames Args (3);
6315 Result_Type : Node_Id renames Args (4);
6316 Mechanism : Node_Id renames Args (5);
6317 Result_Mechanism : Node_Id renames Args (6);
6318 First_Optional_Parameter : Node_Id renames Args (7);
6322 Gather_Associations (Names, Args);
6323 Process_Extended_Import_Export_Subprogram_Pragma (
6324 Arg_Internal => Internal,
6325 Arg_External => External,
6326 Arg_Parameter_Types => Parameter_Types,
6327 Arg_Result_Type => Result_Type,
6328 Arg_Mechanism => Mechanism,
6329 Arg_Result_Mechanism => Result_Mechanism,
6330 Arg_First_Optional_Parameter => First_Optional_Parameter);
6331 end Import_Function;
6337 -- pragma Import_Object (
6338 -- [Internal =>] LOCAL_NAME,
6339 -- [, [External =>] EXTERNAL_SYMBOL]
6340 -- [, [Size =>] EXTERNAL_SYMBOL]);
6342 -- EXTERNAL_SYMBOL ::=
6344 -- | static_string_EXPRESSION
6346 when Pragma_Import_Object => Import_Object : declare
6347 Args : Args_List (1 .. 3);
6348 Names : constant Name_List (1 .. 3) := (
6353 Internal : Node_Id renames Args (1);
6354 External : Node_Id renames Args (2);
6355 Size : Node_Id renames Args (3);
6359 Gather_Associations (Names, Args);
6360 Process_Extended_Import_Export_Object_Pragma (
6361 Arg_Internal => Internal,
6362 Arg_External => External,
6366 ----------------------
6367 -- Import_Procedure --
6368 ----------------------
6370 -- pragma Import_Procedure (
6371 -- [Internal =>] LOCAL_NAME,
6372 -- [, [External =>] EXTERNAL_SYMBOL]
6373 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6374 -- [, [Mechanism =>] MECHANISM]
6375 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6377 -- EXTERNAL_SYMBOL ::=
6379 -- | static_string_EXPRESSION
6381 -- PARAMETER_TYPES ::=
6383 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6385 -- TYPE_DESIGNATOR ::=
6387 -- | subtype_Name ' Access
6391 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6393 -- MECHANISM_ASSOCIATION ::=
6394 -- [formal_parameter_NAME =>] MECHANISM_NAME
6396 -- MECHANISM_NAME ::=
6399 -- | Descriptor [([Class =>] CLASS_NAME)]
6401 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6403 when Pragma_Import_Procedure => Import_Procedure : declare
6404 Args : Args_List (1 .. 5);
6405 Names : constant Name_List (1 .. 5) := (
6408 Name_Parameter_Types,
6410 Name_First_Optional_Parameter);
6412 Internal : Node_Id renames Args (1);
6413 External : Node_Id renames Args (2);
6414 Parameter_Types : Node_Id renames Args (3);
6415 Mechanism : Node_Id renames Args (4);
6416 First_Optional_Parameter : Node_Id renames Args (5);
6420 Gather_Associations (Names, Args);
6421 Process_Extended_Import_Export_Subprogram_Pragma (
6422 Arg_Internal => Internal,
6423 Arg_External => External,
6424 Arg_Parameter_Types => Parameter_Types,
6425 Arg_Mechanism => Mechanism,
6426 Arg_First_Optional_Parameter => First_Optional_Parameter);
6427 end Import_Procedure;
6429 -----------------------------
6430 -- Import_Valued_Procedure --
6431 -----------------------------
6433 -- pragma Import_Valued_Procedure (
6434 -- [Internal =>] LOCAL_NAME,
6435 -- [, [External =>] EXTERNAL_SYMBOL]
6436 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6437 -- [, [Mechanism =>] MECHANISM]
6438 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6440 -- EXTERNAL_SYMBOL ::=
6442 -- | static_string_EXPRESSION
6444 -- PARAMETER_TYPES ::=
6446 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6448 -- TYPE_DESIGNATOR ::=
6450 -- | subtype_Name ' Access
6454 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6456 -- MECHANISM_ASSOCIATION ::=
6457 -- [formal_parameter_NAME =>] MECHANISM_NAME
6459 -- MECHANISM_NAME ::=
6462 -- | Descriptor [([Class =>] CLASS_NAME)]
6464 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6466 when Pragma_Import_Valued_Procedure =>
6467 Import_Valued_Procedure : declare
6468 Args : Args_List (1 .. 5);
6469 Names : constant Name_List (1 .. 5) := (
6472 Name_Parameter_Types,
6474 Name_First_Optional_Parameter);
6476 Internal : Node_Id renames Args (1);
6477 External : Node_Id renames Args (2);
6478 Parameter_Types : Node_Id renames Args (3);
6479 Mechanism : Node_Id renames Args (4);
6480 First_Optional_Parameter : Node_Id renames Args (5);
6484 Gather_Associations (Names, Args);
6485 Process_Extended_Import_Export_Subprogram_Pragma (
6486 Arg_Internal => Internal,
6487 Arg_External => External,
6488 Arg_Parameter_Types => Parameter_Types,
6489 Arg_Mechanism => Mechanism,
6490 Arg_First_Optional_Parameter => First_Optional_Parameter);
6491 end Import_Valued_Procedure;
6493 ------------------------
6494 -- Initialize_Scalars --
6495 ------------------------
6497 -- pragma Initialize_Scalars;
6499 when Pragma_Initialize_Scalars =>
6501 Check_Arg_Count (0);
6502 Check_Valid_Configuration_Pragma;
6503 Check_Restriction (No_Initialize_Scalars, N);
6505 if not Restriction_Active (No_Initialize_Scalars) then
6506 Init_Or_Norm_Scalars := True;
6507 Initialize_Scalars := True;
6514 -- pragma Inline ( NAME {, NAME} );
6516 when Pragma_Inline =>
6518 -- Pragma is active if inlining option is active
6520 if Inline_Active then
6521 Process_Inline (True);
6523 -- Pragma is active in a predefined file in config run time mode
6525 elsif Configurable_Run_Time_Mode
6527 Is_Predefined_File_Name (Unit_File_Name (Current_Sem_Unit))
6529 Process_Inline (True);
6531 -- Otherwise inlining is not active
6534 Process_Inline (False);
6541 -- pragma Inline_Always ( NAME {, NAME} );
6543 when Pragma_Inline_Always =>
6544 Process_Inline (True);
6546 --------------------
6547 -- Inline_Generic --
6548 --------------------
6550 -- pragma Inline_Generic (NAME {, NAME});
6552 when Pragma_Inline_Generic =>
6553 Process_Generic_List;
6555 ----------------------
6556 -- Inspection_Point --
6557 ----------------------
6559 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
6561 when Pragma_Inspection_Point => Inspection_Point : declare
6566 if Arg_Count > 0 then
6569 Exp := Expression (Arg);
6572 if not Is_Entity_Name (Exp)
6573 or else not Is_Object (Entity (Exp))
6575 Error_Pragma_Arg ("object name required", Arg);
6582 end Inspection_Point;
6588 -- pragma Interface (
6589 -- convention_IDENTIFIER,
6592 when Pragma_Interface =>
6594 Check_Arg_Count (2);
6595 Check_No_Identifiers;
6596 Process_Import_Or_Interface;
6598 --------------------
6599 -- Interface_Name --
6600 --------------------
6602 -- pragma Interface_Name (
6603 -- [ Entity =>] local_NAME
6604 -- [,[External_Name =>] static_string_EXPRESSION ]
6605 -- [,[Link_Name =>] static_string_EXPRESSION ]);
6607 when Pragma_Interface_Name => Interface_Name : declare
6615 Check_At_Least_N_Arguments (2);
6616 Check_At_Most_N_Arguments (3);
6617 Id := Expression (Arg1);
6620 if not Is_Entity_Name (Id) then
6622 ("first argument for pragma% must be entity name", Arg1);
6623 elsif Etype (Id) = Any_Type then
6626 Def_Id := Entity (Id);
6629 -- Special DEC-compatible processing for the object case,
6630 -- forces object to be imported.
6632 if Ekind (Def_Id) = E_Variable then
6633 Kill_Size_Check_Code (Def_Id);
6634 Note_Possible_Modification (Id);
6636 -- Initialization is not allowed for imported variable
6638 if Present (Expression (Parent (Def_Id)))
6639 and then Comes_From_Source (Expression (Parent (Def_Id)))
6641 Error_Msg_Sloc := Sloc (Def_Id);
6643 ("no initialization allowed for declaration of& #",
6647 -- For compatibility, support VADS usage of providing both
6648 -- pragmas Interface and Interface_Name to obtain the effect
6649 -- of a single Import pragma.
6651 if Is_Imported (Def_Id)
6652 and then Present (First_Rep_Item (Def_Id))
6653 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
6654 and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
6658 Set_Imported (Def_Id);
6661 Set_Is_Public (Def_Id);
6662 Process_Interface_Name (Def_Id, Arg2, Arg3);
6665 -- Otherwise must be subprogram
6667 elsif not Is_Subprogram (Def_Id) then
6669 ("argument of pragma% is not subprogram", Arg1);
6672 Check_At_Most_N_Arguments (3);
6676 -- Loop through homonyms
6679 Def_Id := Get_Base_Subprogram (Hom_Id);
6681 if Is_Imported (Def_Id) then
6682 Process_Interface_Name (Def_Id, Arg2, Arg3);
6686 Hom_Id := Homonym (Hom_Id);
6688 exit when No (Hom_Id)
6689 or else Scope (Hom_Id) /= Current_Scope;
6694 ("argument of pragma% is not imported subprogram",
6700 -----------------------
6701 -- Interrupt_Handler --
6702 -----------------------
6704 -- pragma Interrupt_Handler (handler_NAME);
6706 when Pragma_Interrupt_Handler =>
6707 Check_Ada_83_Warning;
6708 Check_Arg_Count (1);
6709 Check_No_Identifiers;
6711 if No_Run_Time_Mode then
6712 Error_Msg_CRT ("Interrupt_Handler pragma", N);
6714 Check_Interrupt_Or_Attach_Handler;
6715 Process_Interrupt_Or_Attach_Handler;
6718 ------------------------
6719 -- Interrupt_Priority --
6720 ------------------------
6722 -- pragma Interrupt_Priority [(EXPRESSION)];
6724 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
6725 P : constant Node_Id := Parent (N);
6729 Check_Ada_83_Warning;
6731 if Arg_Count /= 0 then
6732 Arg := Expression (Arg1);
6733 Check_Arg_Count (1);
6734 Check_No_Identifiers;
6736 -- The expression must be analyzed in the special manner
6737 -- described in "Handling of Default and Per-Object
6738 -- Expressions" in sem.ads.
6740 Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
6743 if Nkind (P) /= N_Task_Definition
6744 and then Nkind (P) /= N_Protected_Definition
6749 elsif Has_Priority_Pragma (P) then
6750 Error_Pragma ("duplicate pragma% not allowed");
6753 Set_Has_Priority_Pragma (P, True);
6754 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
6756 end Interrupt_Priority;
6758 ---------------------
6759 -- Interrupt_State --
6760 ---------------------
6762 -- pragma Interrupt_State (
6763 -- [Name =>] INTERRUPT_ID,
6764 -- [State =>] INTERRUPT_STATE);
6766 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
6767 -- INTERRUPT_STATE => System | Runtime | User
6769 -- Note: if the interrupt id is given as an identifier, then
6770 -- it must be one of the identifiers in Ada.Interrupts.Names.
6771 -- Otherwise it is given as a static integer expression which
6772 -- must be in the range of Ada.Interrupts.Interrupt_ID.
6774 when Pragma_Interrupt_State => Interrupt_State : declare
6776 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
6777 -- This is the entity Ada.Interrupts.Interrupt_ID;
6779 State_Type : Character;
6780 -- Set to 's'/'r'/'u' for System/Runtime/User
6783 -- Index to entry in Interrupt_States table
6786 -- Value of interrupt
6788 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
6789 -- The first argument to the pragma
6791 Int_Ent : Entity_Id;
6792 -- Interrupt entity in Ada.Interrupts.Names
6796 Check_Arg_Count (2);
6798 Check_Optional_Identifier (Arg1, Name_Name);
6799 Check_Optional_Identifier (Arg2, "state");
6800 Check_Arg_Is_Identifier (Arg2);
6802 -- First argument is identifier
6804 if Nkind (Arg1X) = N_Identifier then
6806 -- Search list of names in Ada.Interrupts.Names
6808 Int_Ent := First_Entity (RTE (RE_Names));
6810 if No (Int_Ent) then
6811 Error_Pragma_Arg ("invalid interrupt name", Arg1);
6813 elsif Chars (Int_Ent) = Chars (Arg1X) then
6814 Int_Val := Expr_Value (Constant_Value (Int_Ent));
6818 Next_Entity (Int_Ent);
6821 -- First argument is not an identifier, so it must be a
6822 -- static expression of type Ada.Interrupts.Interrupt_ID.
6825 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6826 Int_Val := Expr_Value (Arg1X);
6828 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
6830 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
6833 ("value not in range of type " &
6834 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
6840 case Chars (Get_Pragma_Arg (Arg2)) is
6841 when Name_Runtime => State_Type := 'r';
6842 when Name_System => State_Type := 's';
6843 when Name_User => State_Type := 'u';
6846 Error_Pragma_Arg ("invalid interrupt state", Arg2);
6849 -- Check if entry is already stored
6851 IST_Num := Interrupt_States.First;
6853 -- If entry not found, add it
6855 if IST_Num > Interrupt_States.Last then
6856 Interrupt_States.Append
6857 ((Interrupt_Number => UI_To_Int (Int_Val),
6858 Interrupt_State => State_Type,
6859 Pragma_Loc => Loc));
6862 -- Case of entry for the same entry
6864 elsif Int_Val = Interrupt_States.Table (IST_Num).
6867 -- If state matches, done, no need to make redundant entry
6870 State_Type = Interrupt_States.Table (IST_Num).
6873 -- Otherwise if state does not match, error
6876 Interrupt_States.Table (IST_Num).Pragma_Loc;
6878 ("state conflicts with that given at #", Arg2);
6882 IST_Num := IST_Num + 1;
6884 end Interrupt_State;
6886 ----------------------
6887 -- Java_Constructor --
6888 ----------------------
6890 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
6892 when Pragma_Java_Constructor => Java_Constructor : declare
6899 Check_Arg_Count (1);
6900 Check_Optional_Identifier (Arg1, Name_Entity);
6901 Check_Arg_Is_Local_Name (Arg1);
6903 Id := Expression (Arg1);
6904 Find_Program_Unit_Name (Id);
6906 -- If we did not find the name, we are done
6908 if Etype (Id) = Any_Type then
6912 Hom_Id := Entity (Id);
6914 -- Loop through homonyms
6917 Def_Id := Get_Base_Subprogram (Hom_Id);
6919 -- The constructor is required to be a function returning
6920 -- an access type whose designated type has convention Java.
6922 if Ekind (Def_Id) = E_Function
6923 and then Ekind (Etype (Def_Id)) in Access_Kind
6926 (Designated_Type (Etype (Def_Id))) = Convention_Java
6929 (Root_Type (Designated_Type (Etype (Def_Id))))
6932 Set_Is_Constructor (Def_Id);
6933 Set_Convention (Def_Id, Convention_Java);
6937 ("pragma% requires function returning a 'Java access type",
6941 Hom_Id := Homonym (Hom_Id);
6943 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
6945 end Java_Constructor;
6947 ----------------------
6948 -- Java_Interface --
6949 ----------------------
6951 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
6953 when Pragma_Java_Interface => Java_Interface : declare
6959 Check_Arg_Count (1);
6960 Check_Optional_Identifier (Arg1, Name_Entity);
6961 Check_Arg_Is_Local_Name (Arg1);
6963 Arg := Expression (Arg1);
6966 if Etype (Arg) = Any_Type then
6970 if not Is_Entity_Name (Arg)
6971 or else not Is_Type (Entity (Arg))
6973 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6976 Typ := Underlying_Type (Entity (Arg));
6978 -- For now we simply check some of the semantic constraints
6979 -- on the type. This currently leaves out some restrictions
6980 -- on interface types, namely that the parent type must be
6981 -- java.lang.Object.Typ and that all primitives of the type
6982 -- should be declared abstract. ???
6984 if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
6985 Error_Pragma_Arg ("pragma% requires an abstract "
6986 & "tagged type", Arg1);
6988 elsif not Has_Discriminants (Typ)
6989 or else Ekind (Etype (First_Discriminant (Typ)))
6990 /= E_Anonymous_Access_Type
6992 not Is_Class_Wide_Type
6993 (Designated_Type (Etype (First_Discriminant (Typ))))
6996 ("type must have a class-wide access discriminant", Arg1);
7004 -- pragma Keep_Names ([On => ] local_NAME);
7006 when Pragma_Keep_Names => Keep_Names : declare
7011 Check_Arg_Count (1);
7012 Check_Optional_Identifier (Arg1, Name_On);
7013 Check_Arg_Is_Local_Name (Arg1);
7015 Arg := Expression (Arg1);
7018 if Etype (Arg) = Any_Type then
7022 if not Is_Entity_Name (Arg)
7023 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
7026 ("pragma% requires a local enumeration type", Arg1);
7029 Set_Discard_Names (Entity (Arg), False);
7036 -- pragma License (RESTRICTED | UNRESRICTED | GPL | MODIFIED_GPL);
7038 when Pragma_License =>
7040 Check_Arg_Count (1);
7041 Check_No_Identifiers;
7042 Check_Valid_Configuration_Pragma;
7043 Check_Arg_Is_Identifier (Arg1);
7046 Sind : constant Source_File_Index :=
7047 Source_Index (Current_Sem_Unit);
7050 case Chars (Get_Pragma_Arg (Arg1)) is
7052 Set_License (Sind, GPL);
7054 when Name_Modified_GPL =>
7055 Set_License (Sind, Modified_GPL);
7057 when Name_Restricted =>
7058 Set_License (Sind, Restricted);
7060 when Name_Unrestricted =>
7061 Set_License (Sind, Unrestricted);
7064 Error_Pragma_Arg ("invalid license name", Arg1);
7072 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
7074 when Pragma_Link_With => Link_With : declare
7080 if Operating_Mode = Generate_Code
7081 and then In_Extended_Main_Source_Unit (N)
7083 Check_At_Least_N_Arguments (1);
7084 Check_No_Identifiers;
7085 Check_Is_In_Decl_Part_Or_Package_Spec;
7086 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7090 while Present (Arg) loop
7091 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7093 -- Store argument, converting sequences of spaces
7094 -- to a single null character (this is one of the
7095 -- differences in processing between Link_With
7096 -- and Linker_Options).
7099 C : constant Char_Code := Get_Char_Code (' ');
7100 S : constant String_Id :=
7101 Strval (Expr_Value_S (Expression (Arg)));
7102 L : constant Nat := String_Length (S);
7105 procedure Skip_Spaces;
7106 -- Advance F past any spaces
7108 procedure Skip_Spaces is
7110 while F <= L and then Get_String_Char (S, F) = C loop
7116 Skip_Spaces; -- skip leading spaces
7118 -- Loop through characters, changing any embedded
7119 -- sequence of spaces to a single null character
7120 -- (this is how Link_With/Linker_Options differ)
7123 if Get_String_Char (S, F) = C then
7126 Store_String_Char (ASCII.NUL);
7129 Store_String_Char (Get_String_Char (S, F));
7137 if Present (Arg) then
7138 Store_String_Char (ASCII.NUL);
7142 Store_Linker_Option_String (End_String);
7150 -- pragma Linker_Alias (
7151 -- [Entity =>] LOCAL_NAME
7152 -- [Alias =>] static_string_EXPRESSION);
7154 when Pragma_Linker_Alias =>
7156 Check_Arg_Count (2);
7157 Check_Optional_Identifier (Arg1, Name_Entity);
7158 Check_Optional_Identifier (Arg2, "alias");
7159 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7160 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7162 -- The only processing required is to link this item on to the
7163 -- list of rep items for the given entity. This is accomplished
7164 -- by the call to Rep_Item_Too_Late (when no error is detected
7165 -- and False is returned).
7167 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7170 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7173 --------------------
7174 -- Linker_Options --
7175 --------------------
7177 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
7179 when Pragma_Linker_Options => Linker_Options : declare
7183 Check_Ada_83_Warning;
7184 Check_No_Identifiers;
7185 Check_Arg_Count (1);
7186 Check_Is_In_Decl_Part_Or_Package_Spec;
7188 if Operating_Mode = Generate_Code
7189 and then In_Extended_Main_Source_Unit (N)
7191 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7192 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
7195 while Present (Arg) loop
7196 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7197 Store_String_Char (ASCII.NUL);
7199 (Strval (Expr_Value_S (Expression (Arg))));
7203 Store_Linker_Option_String (End_String);
7207 --------------------
7208 -- Linker_Section --
7209 --------------------
7211 -- pragma Linker_Section (
7212 -- [Entity =>] LOCAL_NAME
7213 -- [Section =>] static_string_EXPRESSION);
7215 when Pragma_Linker_Section =>
7217 Check_Arg_Count (2);
7218 Check_Optional_Identifier (Arg1, Name_Entity);
7219 Check_Optional_Identifier (Arg2, Name_Section);
7220 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7221 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7223 -- The only processing required is to link this item on to the
7224 -- list of rep items for the given entity. This is accomplished
7225 -- by the call to Rep_Item_Too_Late (when no error is detected
7226 -- and False is returned).
7228 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7231 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7238 -- pragma List (On | Off)
7240 -- There is nothing to do here, since we did all the processing
7241 -- for this pragma in Par.Prag (so that it works properly even in
7242 -- syntax only mode)
7247 --------------------
7248 -- Locking_Policy --
7249 --------------------
7251 -- pragma Locking_Policy (policy_IDENTIFIER);
7253 when Pragma_Locking_Policy => declare
7257 Check_Ada_83_Warning;
7258 Check_Arg_Count (1);
7259 Check_No_Identifiers;
7260 Check_Arg_Is_Locking_Policy (Arg1);
7261 Check_Valid_Configuration_Pragma;
7262 Get_Name_String (Chars (Expression (Arg1)));
7263 LP := Fold_Upper (Name_Buffer (1));
7265 if Locking_Policy /= ' '
7266 and then Locking_Policy /= LP
7268 Error_Msg_Sloc := Locking_Policy_Sloc;
7269 Error_Pragma ("locking policy incompatible with policy#");
7271 -- Set new policy, but always preserve System_Location since
7272 -- we like the error message with the run time name.
7275 Locking_Policy := LP;
7277 if Locking_Policy_Sloc /= System_Location then
7278 Locking_Policy_Sloc := Loc;
7287 -- pragma Long_Float (D_Float | G_Float);
7289 when Pragma_Long_Float =>
7291 Check_Valid_Configuration_Pragma;
7292 Check_Arg_Count (1);
7293 Check_No_Identifier (Arg1);
7294 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
7296 if not OpenVMS_On_Target then
7297 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
7302 if Chars (Expression (Arg1)) = Name_D_Float then
7303 if Opt.Float_Format_Long = 'G' then
7304 Error_Pragma ("G_Float previously specified");
7307 Opt.Float_Format_Long := 'D';
7309 -- G_Float case (this is the default, does not need overriding)
7312 if Opt.Float_Format_Long = 'D' then
7313 Error_Pragma ("D_Float previously specified");
7316 Opt.Float_Format_Long := 'G';
7319 Set_Standard_Fpt_Formats;
7321 -----------------------
7322 -- Machine_Attribute --
7323 -----------------------
7325 -- pragma Machine_Attribute (
7326 -- [Entity =>] LOCAL_NAME,
7327 -- [Attribute_Name =>] static_string_EXPRESSION
7328 -- [,[Info =>] static_string_EXPRESSION] );
7330 when Pragma_Machine_Attribute => Machine_Attribute : declare
7336 if Arg_Count = 3 then
7337 Check_Optional_Identifier (Arg3, "info");
7338 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
7340 Check_Arg_Count (2);
7343 Check_Arg_Is_Local_Name (Arg1);
7344 Check_Optional_Identifier (Arg2, "attribute_name");
7345 Check_Optional_Identifier (Arg1, Name_Entity);
7346 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7347 Def_Id := Entity (Expression (Arg1));
7349 if Is_Access_Type (Def_Id) then
7350 Def_Id := Designated_Type (Def_Id);
7353 if Rep_Item_Too_Early (Def_Id, N) then
7357 Def_Id := Underlying_Type (Def_Id);
7359 -- The only processing required is to link this item on to the
7360 -- list of rep items for the given entity. This is accomplished
7361 -- by the call to Rep_Item_Too_Late (when no error is detected
7362 -- and False is returned).
7364 if Rep_Item_Too_Late (Def_Id, N) then
7367 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7369 end Machine_Attribute;
7375 -- pragma Main_Storage
7376 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7378 -- MAIN_STORAGE_OPTION ::=
7379 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7380 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7382 when Pragma_Main => Main : declare
7383 Args : Args_List (1 .. 3);
7384 Names : constant Name_List (1 .. 3) := (
7386 Name_Task_Stack_Size_Default,
7387 Name_Time_Slicing_Enabled);
7393 Gather_Associations (Names, Args);
7395 for J in 1 .. 2 loop
7396 if Present (Args (J)) then
7397 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7401 if Present (Args (3)) then
7402 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
7406 while Present (Nod) loop
7407 if Nkind (Nod) = N_Pragma
7408 and then Chars (Nod) = Name_Main
7410 Error_Msg_Name_1 := Chars (N);
7411 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7422 -- pragma Main_Storage
7423 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7425 -- MAIN_STORAGE_OPTION ::=
7426 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7427 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7429 when Pragma_Main_Storage => Main_Storage : declare
7430 Args : Args_List (1 .. 2);
7431 Names : constant Name_List (1 .. 2) := (
7432 Name_Working_Storage,
7439 Gather_Associations (Names, Args);
7441 for J in 1 .. 2 loop
7442 if Present (Args (J)) then
7443 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7447 Check_In_Main_Program;
7450 while Present (Nod) loop
7451 if Nkind (Nod) = N_Pragma
7452 and then Chars (Nod) = Name_Main_Storage
7454 Error_Msg_Name_1 := Chars (N);
7455 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7466 -- pragma Memory_Size (NUMERIC_LITERAL)
7468 when Pragma_Memory_Size =>
7471 -- Memory size is simply ignored
7473 Check_No_Identifiers;
7474 Check_Arg_Count (1);
7475 Check_Arg_Is_Integer_Literal (Arg1);
7481 -- pragma No_Return (procedure_LOCAL_NAME);
7483 when Pragma_No_Return => No_Return : declare
7490 Check_Arg_Count (1);
7491 Check_No_Identifiers;
7492 Check_Arg_Is_Local_Name (Arg1);
7493 Id := Expression (Arg1);
7496 if not Is_Entity_Name (Id) then
7497 Error_Pragma_Arg ("entity name required", Arg1);
7500 if Etype (Id) = Any_Type then
7508 and then Scope (E) = Current_Scope
7510 if Ekind (E) = E_Procedure
7511 or else Ekind (E) = E_Generic_Procedure
7521 Error_Pragma ("no procedures found for pragma%");
7525 ------------------------
7526 -- No_Strict_Aliasing --
7527 ------------------------
7529 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
7534 Check_At_Most_N_Arguments (1);
7536 if Arg_Count = 0 then
7537 Check_Valid_Configuration_Pragma;
7538 Opt.No_Strict_Aliasing := True;
7541 Check_Optional_Identifier (Arg2, Name_Entity);
7542 Check_Arg_Is_Local_Name (Arg1);
7543 E_Id := Entity (Expression (Arg1));
7545 if E_Id = Any_Type then
7547 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
7548 Error_Pragma_Arg ("pragma% requires access type", Arg1);
7551 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
7553 end No_Strict_Alias;
7559 -- pragma Obsolescent [(static_string_EXPRESSION)];
7561 when Pragma_Obsolescent => Obsolescent : declare
7564 Check_At_Most_N_Arguments (1);
7565 Check_No_Identifiers;
7567 if Arg_Count = 1 then
7568 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7572 or else (Nkind (Prev (N))) /= N_Subprogram_Declaration
7575 ("pragma% misplaced, must immediately " &
7576 "follow subprogram spec");
7584 -- pragma No_Run_Time
7586 -- Note: this pragma is retained for backwards compatibiltiy.
7587 -- See body of Rtsfind for full details on its handling.
7589 when Pragma_No_Run_Time =>
7591 Check_Valid_Configuration_Pragma;
7592 Check_Arg_Count (0);
7594 No_Run_Time_Mode := True;
7595 Configurable_Run_Time_Mode := True;
7598 Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
7601 Duration_32_Bits_On_Target := True;
7605 Set_Restriction (No_Finalization, N);
7606 Set_Restriction (No_Exception_Handlers, N);
7607 Set_Restriction (Max_Tasks, N, 0);
7608 Set_Restriction (No_Tasking, N);
7610 -----------------------
7611 -- Normalize_Scalars --
7612 -----------------------
7614 -- pragma Normalize_Scalars;
7616 when Pragma_Normalize_Scalars =>
7617 Check_Ada_83_Warning;
7618 Check_Arg_Count (0);
7619 Check_Valid_Configuration_Pragma;
7620 Normalize_Scalars := True;
7621 Init_Or_Norm_Scalars := True;
7627 -- pragma Optimize (Time | Space);
7629 -- The actual check for optimize is done in Gigi. Note that this
7630 -- pragma does not actually change the optimization setting, it
7631 -- simply checks that it is consistent with the pragma.
7633 when Pragma_Optimize =>
7634 Check_No_Identifiers;
7635 Check_Arg_Count (1);
7636 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
7638 -------------------------
7639 -- Optional_Overriding --
7640 -------------------------
7642 -- These pragmas are treated as part of the previous subprogram
7643 -- declaration, and analyzed immediately after it (see sem_ch6,
7644 -- Check_Overriding_Operation). If the pragma has not been analyzed
7645 -- yet, it appears in the wrong place.
7647 when Pragma_Optional_Overriding =>
7648 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7654 when Pragma_Overriding =>
7655 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7661 -- pragma Pack (first_subtype_LOCAL_NAME);
7663 when Pragma_Pack => Pack : declare
7664 Assoc : constant Node_Id := Arg1;
7669 Check_No_Identifiers;
7670 Check_Arg_Count (1);
7671 Check_Arg_Is_Local_Name (Arg1);
7673 Type_Id := Expression (Assoc);
7674 Find_Type (Type_Id);
7675 Typ := Entity (Type_Id);
7678 or else Rep_Item_Too_Early (Typ, N)
7682 Typ := Underlying_Type (Typ);
7685 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
7686 Error_Pragma ("pragma% must specify array or record type");
7689 Check_First_Subtype (Arg1);
7691 if Has_Pragma_Pack (Typ) then
7692 Error_Pragma ("duplicate pragma%, only one allowed");
7694 -- Array type. We set the Has_Pragma_Pack flag, and Is_Packed,
7695 -- but not Has_Non_Standard_Rep, because we don't actually know
7696 -- till freeze time if the array can have packed representation.
7697 -- That's because in the general case we do not know enough about
7698 -- the component type until it in turn is frozen, which certainly
7699 -- happens before the array type is frozen, but not necessarily
7700 -- till that point (i.e. right now it may be unfrozen).
7702 elsif Is_Array_Type (Typ) then
7703 if Has_Aliased_Components (Base_Type (Typ)) then
7705 ("pragma% ignored, cannot pack aliased components?");
7707 elsif Has_Atomic_Components (Typ)
7708 or else Is_Atomic (Component_Type (Typ))
7711 ("?pragma% ignored, cannot pack atomic components");
7713 elsif not Rep_Item_Too_Late (Typ, N) then
7714 Set_Is_Packed (Base_Type (Typ));
7715 Set_Has_Pragma_Pack (Base_Type (Typ));
7716 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7719 -- Record type. For record types, the pack is always effective
7721 else pragma Assert (Is_Record_Type (Typ));
7722 if not Rep_Item_Too_Late (Typ, N) then
7723 Set_Has_Pragma_Pack (Base_Type (Typ));
7724 Set_Is_Packed (Base_Type (Typ));
7725 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7736 -- There is nothing to do here, since we did all the processing
7737 -- for this pragma in Par.Prag (so that it works properly even in
7738 -- syntax only mode)
7747 -- pragma Passive [(PASSIVE_FORM)];
7749 -- PASSIVE_FORM ::= Semaphore | No
7751 when Pragma_Passive =>
7754 if Nkind (Parent (N)) /= N_Task_Definition then
7755 Error_Pragma ("pragma% must be within task definition");
7758 if Arg_Count /= 0 then
7759 Check_Arg_Count (1);
7760 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
7767 -- pragma Polling (ON | OFF);
7769 when Pragma_Polling =>
7771 Check_Arg_Count (1);
7772 Check_No_Identifiers;
7773 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7774 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
7776 ---------------------
7777 -- Persistent_Data --
7778 ---------------------
7780 when Pragma_Persistent_Data => declare
7784 -- Register the pragma as applying to the compilation unit.
7785 -- Individual Persistent_Object pragmas for relevant objects
7786 -- are generated the end of the compilation.
7789 Check_Valid_Configuration_Pragma;
7790 Check_Arg_Count (0);
7791 Ent := Find_Lib_Unit_Name;
7792 Set_Is_Preelaborated (Ent);
7795 -----------------------
7796 -- Persistent_Object --
7797 -----------------------
7799 when Pragma_Persistent_Object => declare
7807 Check_Arg_Count (1);
7808 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7810 if not Is_Entity_Name (Expression (Arg1))
7812 (Ekind (Entity (Expression (Arg1))) /= E_Variable
7813 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
7815 Error_Pragma_Arg ("pragma only applies to objects", Arg1);
7818 Ent := Entity (Expression (Arg1));
7819 Decl := Parent (Ent);
7821 if Nkind (Decl) /= N_Object_Declaration then
7825 -- Placement of the object depends on whether there is
7826 -- an initial value or none. If the No_Initialization flag
7827 -- is set, the initialization has been transformed into
7828 -- assignments, which is disallowed elaboration code.
7830 if No_Initialization (Decl) then
7832 ("initialization for persistent object"
7833 & "must be static expression", Decl);
7837 if No (Expression (Decl)) then
7839 Store_String_Chars ("section ("".persistent.bss"")");
7843 if not Is_OK_Static_Expression (Expression (Decl)) then
7844 Flag_Non_Static_Expr
7845 ("initialization for persistent object"
7846 & "must be static expression!", Expression (Decl));
7851 Store_String_Chars ("section ("".persistent.data"")");
7858 Name_Machine_Attribute,
7860 (Make_Pragma_Argument_Association
7861 (Sloc => Sloc (Arg1),
7862 Expression => New_Occurrence_Of (Ent, Sloc (Ent))),
7863 Make_Pragma_Argument_Association
7864 (Sloc => Sloc (Arg1),
7867 (Sloc => Sloc (Arg1),
7870 Insert_After (N, MA);
7872 Set_Has_Gigi_Rep_Item (Ent);
7879 -- pragma Preelaborate [(library_unit_NAME)];
7881 -- Set the flag Is_Preelaborated of program unit name entity
7883 when Pragma_Preelaborate => Preelaborate : declare
7884 Pa : constant Node_Id := Parent (N);
7885 Pk : constant Node_Kind := Nkind (Pa);
7889 Check_Ada_83_Warning;
7890 Check_Valid_Library_Unit_Pragma;
7892 if Nkind (N) = N_Null_Statement then
7896 Ent := Find_Lib_Unit_Name;
7898 -- This filters out pragmas inside generic parent then
7899 -- show up inside instantiation
7902 and then not (Pk = N_Package_Specification
7903 and then Present (Generic_Parent (Pa)))
7905 if not Debug_Flag_U then
7906 Set_Is_Preelaborated (Ent);
7907 Set_Suppress_Elaboration_Warnings (Ent);
7916 -- pragma Priority (EXPRESSION);
7918 when Pragma_Priority => Priority : declare
7919 P : constant Node_Id := Parent (N);
7923 Check_No_Identifiers;
7924 Check_Arg_Count (1);
7928 if Nkind (P) = N_Subprogram_Body then
7929 Check_In_Main_Program;
7931 Arg := Expression (Arg1);
7932 Analyze_And_Resolve (Arg, Standard_Integer);
7936 if not Is_Static_Expression (Arg) then
7937 Flag_Non_Static_Expr
7938 ("main subprogram priority is not static!", Arg);
7941 -- If constraint error, then we already signalled an error
7943 elsif Raises_Constraint_Error (Arg) then
7946 -- Otherwise check in range
7950 Val : constant Uint := Expr_Value (Arg);
7954 or else Val > Expr_Value (Expression
7955 (Parent (RTE (RE_Max_Priority))))
7958 ("main subprogram priority is out of range", Arg1);
7964 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
7966 -- Task or Protected, must be of type Integer
7968 elsif Nkind (P) = N_Protected_Definition
7970 Nkind (P) = N_Task_Definition
7972 Arg := Expression (Arg1);
7974 -- The expression must be analyzed in the special manner
7975 -- described in "Handling of Default and Per-Object
7976 -- Expressions" in sem.ads.
7978 Analyze_Per_Use_Expression (Arg, Standard_Integer);
7980 if not Is_Static_Expression (Arg) then
7981 Check_Restriction (Static_Priorities, Arg);
7984 -- Anything else is incorrect
7990 if Has_Priority_Pragma (P) then
7991 Error_Pragma ("duplicate pragma% not allowed");
7993 Set_Has_Priority_Pragma (P, True);
7995 if Nkind (P) = N_Protected_Definition
7997 Nkind (P) = N_Task_Definition
7999 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8000 -- exp_ch9 should use this ???
8009 -- pragma Profile (profile_IDENTIFIER);
8011 -- profile_IDENTIFIER => Ravenscar
8013 when Pragma_Profile =>
8015 Check_Arg_Count (1);
8016 Check_Valid_Configuration_Pragma;
8017 Check_No_Identifiers;
8021 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
8023 if Chars (Argx) = Name_Ravenscar then
8026 Error_Pragma_Arg ("& is not a valid profile", Argx);
8030 --------------------------
8031 -- Propagate_Exceptions --
8032 --------------------------
8034 -- pragma Propagate_Exceptions;
8036 when Pragma_Propagate_Exceptions =>
8038 Check_Arg_Count (0);
8040 if In_Extended_Main_Source_Unit (N) then
8041 Propagate_Exceptions := True;
8048 -- pragma Psect_Object (
8049 -- [Internal =>] LOCAL_NAME,
8050 -- [, [External =>] EXTERNAL_SYMBOL]
8051 -- [, [Size =>] EXTERNAL_SYMBOL]);
8053 when Pragma_Psect_Object | Pragma_Common_Object =>
8054 Psect_Object : declare
8055 Args : Args_List (1 .. 3);
8056 Names : constant Name_List (1 .. 3) := (
8061 Internal : Node_Id renames Args (1);
8062 External : Node_Id renames Args (2);
8063 Size : Node_Id renames Args (3);
8065 R_Internal : Node_Id;
8066 R_External : Node_Id;
8073 procedure Check_Too_Long (Arg : Node_Id);
8074 -- Posts message if the argument is an identifier with more
8075 -- than 31 characters, or a string literal with more than
8076 -- 31 characters, and we are operating under VMS
8078 --------------------
8079 -- Check_Too_Long --
8080 --------------------
8082 procedure Check_Too_Long (Arg : Node_Id) is
8083 X : constant Node_Id := Original_Node (Arg);
8086 if Nkind (X) /= N_String_Literal
8088 Nkind (X) /= N_Identifier
8091 ("inappropriate argument for pragma %", Arg);
8094 if OpenVMS_On_Target then
8095 if (Nkind (X) = N_String_Literal
8096 and then String_Length (Strval (X)) > 31)
8098 (Nkind (X) = N_Identifier
8099 and then Length_Of_Name (Chars (X)) > 31)
8102 ("argument for pragma % is longer than 31 characters",
8108 -- Start of processing for Common_Object/Psect_Object
8112 Gather_Associations (Names, Args);
8113 Process_Extended_Import_Export_Internal_Arg (Internal);
8115 R_Internal := Relocate_Node (Internal);
8117 Def_Id := Entity (R_Internal);
8119 if Ekind (Def_Id) /= E_Constant
8120 and then Ekind (Def_Id) /= E_Variable
8123 ("pragma% must designate an object", Internal);
8126 Check_Too_Long (R_Internal);
8128 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
8130 ("cannot use pragma% for imported/exported object",
8134 if Is_Concurrent_Type (Etype (R_Internal)) then
8136 ("cannot specify pragma % for task/protected object",
8140 if Is_Psected (Def_Id) then
8141 Error_Msg_N ("?duplicate Psect_Object pragma", N);
8143 Set_Is_Psected (Def_Id);
8146 if Ekind (Def_Id) = E_Constant then
8148 ("cannot specify pragma % for a constant", R_Internal);
8151 if Is_Record_Type (Etype (R_Internal)) then
8157 Ent := First_Entity (Etype (R_Internal));
8158 while Present (Ent) loop
8159 Decl := Declaration_Node (Ent);
8161 if Ekind (Ent) = E_Component
8162 and then Nkind (Decl) = N_Component_Declaration
8163 and then Present (Expression (Decl))
8164 and then Warn_On_Export_Import
8167 ("?object for pragma % has defaults", R_Internal);
8177 if Present (Size) then
8178 Check_Too_Long (Size);
8181 -- Make Psect case-insensitive.
8183 if Present (External) then
8184 Check_Too_Long (External);
8186 if Nkind (External) = N_String_Literal then
8187 String_To_Name_Buffer (Strval (External));
8189 Get_Name_String (Chars (External));
8194 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8196 R_External := Make_String_Literal
8197 (Sloc => Sloc (External), Strval => Str);
8199 Get_Name_String (Chars (Internal));
8202 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8204 R_External := Make_String_Literal
8205 (Sloc => Sloc (Internal), Strval => Str);
8208 -- Transform into pragma Linker_Section, add attributes to
8209 -- match what DEC Ada does. Ignore size for now?
8214 Name_Linker_Section,
8216 (Make_Pragma_Argument_Association
8217 (Sloc => Sloc (R_Internal),
8218 Expression => R_Internal),
8219 Make_Pragma_Argument_Association
8220 (Sloc => Sloc (R_External),
8221 Expression => R_External))));
8225 -- Add Machine_Attribute of "overlaid", so the section overlays
8226 -- other sections of the same name.
8229 Store_String_Chars ("overlaid");
8235 Name_Machine_Attribute,
8237 (Make_Pragma_Argument_Association
8238 (Sloc => Sloc (R_Internal),
8239 Expression => R_Internal),
8240 Make_Pragma_Argument_Association
8241 (Sloc => Sloc (R_External),
8244 (Sloc => Sloc (R_External),
8248 -- Add Machine_Attribute of "global", so the section is visible
8252 Store_String_Chars ("global");
8258 Name_Machine_Attribute,
8260 (Make_Pragma_Argument_Association
8261 (Sloc => Sloc (R_Internal),
8262 Expression => R_Internal),
8264 Make_Pragma_Argument_Association
8265 (Sloc => Sloc (R_External),
8268 (Sloc => Sloc (R_External),
8272 -- Add Machine_Attribute of "initialize", so the section is
8276 Store_String_Chars ("initialize");
8282 Name_Machine_Attribute,
8284 (Make_Pragma_Argument_Association
8285 (Sloc => Sloc (R_Internal),
8286 Expression => R_Internal),
8288 Make_Pragma_Argument_Association
8289 (Sloc => Sloc (R_External),
8292 (Sloc => Sloc (R_External),
8301 -- pragma Pure [(library_unit_NAME)];
8303 when Pragma_Pure => Pure : declare
8306 Check_Ada_83_Warning;
8307 Check_Valid_Library_Unit_Pragma;
8309 if Nkind (N) = N_Null_Statement then
8313 Ent := Find_Lib_Unit_Name;
8315 Set_Suppress_Elaboration_Warnings (Ent);
8322 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
8324 when Pragma_Pure_Function => Pure_Function : declare
8328 Effective : Boolean := False;
8332 Check_Arg_Count (1);
8333 Check_Optional_Identifier (Arg1, Name_Entity);
8334 Check_Arg_Is_Local_Name (Arg1);
8335 E_Id := Expression (Arg1);
8337 if Error_Posted (E_Id) then
8341 -- Loop through homonyms (overloadings) of referenced entity
8347 Def_Id := Get_Base_Subprogram (E);
8349 if Ekind (Def_Id) /= E_Function
8350 and then Ekind (Def_Id) /= E_Generic_Function
8351 and then Ekind (Def_Id) /= E_Operator
8354 ("pragma% requires a function name", Arg1);
8357 Set_Is_Pure (Def_Id);
8359 if not Has_Pragma_Pure_Function (Def_Id) then
8360 Set_Has_Pragma_Pure_Function (Def_Id);
8365 exit when No (E) or else Scope (E) /= Current_Scope;
8369 and then Warn_On_Redundant_Constructs
8371 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
8377 --------------------
8378 -- Queuing_Policy --
8379 --------------------
8381 -- pragma Queuing_Policy (policy_IDENTIFIER);
8383 when Pragma_Queuing_Policy => declare
8387 Check_Ada_83_Warning;
8388 Check_Arg_Count (1);
8389 Check_No_Identifiers;
8390 Check_Arg_Is_Queuing_Policy (Arg1);
8391 Check_Valid_Configuration_Pragma;
8392 Get_Name_String (Chars (Expression (Arg1)));
8393 QP := Fold_Upper (Name_Buffer (1));
8395 if Queuing_Policy /= ' '
8396 and then Queuing_Policy /= QP
8398 Error_Msg_Sloc := Queuing_Policy_Sloc;
8399 Error_Pragma ("queuing policy incompatible with policy#");
8401 -- Set new policy, but always preserve System_Location since
8402 -- we like the error message with the run time name.
8405 Queuing_Policy := QP;
8407 if Queuing_Policy_Sloc /= System_Location then
8408 Queuing_Policy_Sloc := Loc;
8413 ---------------------------
8414 -- Remote_Call_Interface --
8415 ---------------------------
8417 -- pragma Remote_Call_Interface [(library_unit_NAME)];
8419 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
8420 Cunit_Node : Node_Id;
8421 Cunit_Ent : Entity_Id;
8425 Check_Ada_83_Warning;
8426 Check_Valid_Library_Unit_Pragma;
8428 if Nkind (N) = N_Null_Statement then
8432 Cunit_Node := Cunit (Current_Sem_Unit);
8433 K := Nkind (Unit (Cunit_Node));
8434 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8436 if K = N_Package_Declaration
8437 or else K = N_Generic_Package_Declaration
8438 or else K = N_Subprogram_Declaration
8439 or else K = N_Generic_Subprogram_Declaration
8440 or else (K = N_Subprogram_Body
8441 and then Acts_As_Spec (Unit (Cunit_Node)))
8446 "pragma% must apply to package or subprogram declaration");
8449 Set_Is_Remote_Call_Interface (Cunit_Ent);
8450 end Remote_Call_Interface;
8456 -- pragma Remote_Types [(library_unit_NAME)];
8458 when Pragma_Remote_Types => Remote_Types : declare
8459 Cunit_Node : Node_Id;
8460 Cunit_Ent : Entity_Id;
8463 Check_Ada_83_Warning;
8464 Check_Valid_Library_Unit_Pragma;
8466 if Nkind (N) = N_Null_Statement then
8470 Cunit_Node := Cunit (Current_Sem_Unit);
8471 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8473 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8475 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8478 "pragma% can only apply to a package declaration");
8481 Set_Is_Remote_Types (Cunit_Ent);
8488 -- pragma Ravenscar;
8490 when Pragma_Ravenscar =>
8492 Check_Arg_Count (0);
8493 Check_Valid_Configuration_Pragma;
8496 -------------------------
8497 -- Restricted_Run_Time --
8498 -------------------------
8500 -- pragma Restricted_Run_Time;
8502 when Pragma_Restricted_Run_Time =>
8504 Check_Arg_Count (0);
8505 Check_Valid_Configuration_Pragma;
8506 Set_Restricted_Profile (N);
8512 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
8515 -- restriction_IDENTIFIER
8516 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8518 when Pragma_Restrictions =>
8519 Process_Restrictions_Or_Restriction_Warnings;
8521 --------------------------
8522 -- Restriction_Warnings --
8523 --------------------------
8525 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
8528 -- restriction_IDENTIFIER
8529 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8531 when Pragma_Restriction_Warnings =>
8532 Process_Restrictions_Or_Restriction_Warnings;
8538 -- pragma Reviewable;
8540 when Pragma_Reviewable =>
8541 Check_Ada_83_Warning;
8542 Check_Arg_Count (0);
8548 -- pragma Share_Generic (NAME {, NAME});
8550 when Pragma_Share_Generic =>
8552 Process_Generic_List;
8558 -- pragma Shared (LOCAL_NAME);
8560 when Pragma_Shared =>
8562 Process_Atomic_Shared_Volatile;
8564 --------------------
8565 -- Shared_Passive --
8566 --------------------
8568 -- pragma Shared_Passive [(library_unit_NAME)];
8570 -- Set the flag Is_Shared_Passive of program unit name entity
8572 when Pragma_Shared_Passive => Shared_Passive : declare
8573 Cunit_Node : Node_Id;
8574 Cunit_Ent : Entity_Id;
8577 Check_Ada_83_Warning;
8578 Check_Valid_Library_Unit_Pragma;
8580 if Nkind (N) = N_Null_Statement then
8584 Cunit_Node := Cunit (Current_Sem_Unit);
8585 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8587 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8589 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8592 "pragma% can only apply to a package declaration");
8595 Set_Is_Shared_Passive (Cunit_Ent);
8598 ----------------------
8599 -- Source_File_Name --
8600 ----------------------
8602 -- There are five forms for this pragma:
8604 -- pragma Source_File_Name (
8605 -- [UNIT_NAME =>] unit_NAME,
8606 -- BODY_FILE_NAME => STRING_LITERAL
8607 -- [, [INDEX =>] INTEGER_LITERAL]);
8609 -- pragma Source_File_Name (
8610 -- [UNIT_NAME =>] unit_NAME,
8611 -- SPEC_FILE_NAME => STRING_LITERAL
8612 -- [, [INDEX =>] INTEGER_LITERAL]);
8614 -- pragma Source_File_Name (
8615 -- BODY_FILE_NAME => STRING_LITERAL
8616 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8617 -- [, CASING => CASING_SPEC]);
8619 -- pragma Source_File_Name (
8620 -- SPEC_FILE_NAME => STRING_LITERAL
8621 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8622 -- [, CASING => CASING_SPEC]);
8624 -- pragma Source_File_Name (
8625 -- SUBUNIT_FILE_NAME => STRING_LITERAL
8626 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8627 -- [, CASING => CASING_SPEC]);
8629 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
8631 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
8632 -- Source_File_Name (SFN), however their usage is exclusive:
8633 -- SFN can only be used when no project file is used, while
8634 -- SFNP can only be used when a project file is used.
8636 -- No processing here. Processing was completed during parsing,
8637 -- since we need to have file names set as early as possible.
8638 -- Units are loaded well before semantic processing starts.
8640 -- The only processing we defer to this point is the check
8641 -- for correct placement.
8643 when Pragma_Source_File_Name =>
8645 Check_Valid_Configuration_Pragma;
8647 ------------------------------
8648 -- Source_File_Name_Project --
8649 ------------------------------
8651 -- See Source_File_Name for syntax
8653 -- No processing here. Processing was completed during parsing,
8654 -- since we need to have file names set as early as possible.
8655 -- Units are loaded well before semantic processing starts.
8657 -- The only processing we defer to this point is the check
8658 -- for correct placement.
8660 when Pragma_Source_File_Name_Project =>
8662 Check_Valid_Configuration_Pragma;
8664 -- Check that a pragma Source_File_Name_Project is used only
8665 -- in a configuration pragmas file.
8667 -- Pragmas Source_File_Name_Project should only be generated
8668 -- by the Project Manager in configuration pragmas files.
8670 -- This is really an ugly test. It seems to depend on some
8671 -- accidental and undocumented property. At the very least
8672 -- it needs to be documented, but it would be better to have
8673 -- a clean way of testing if we are in a configuration file???
8675 if Present (Parent (N)) then
8677 ("pragma% can only appear in a configuration pragmas file");
8680 ----------------------
8681 -- Source_Reference --
8682 ----------------------
8684 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
8686 -- Nothing to do, all processing completed in Par.Prag, since we
8687 -- need the information for possible parser messages that are output
8689 when Pragma_Source_Reference =>
8696 -- pragma Storage_Size (EXPRESSION);
8698 when Pragma_Storage_Size => Storage_Size : declare
8699 P : constant Node_Id := Parent (N);
8703 Check_No_Identifiers;
8704 Check_Arg_Count (1);
8706 -- The expression must be analyzed in the special manner
8707 -- described in "Handling of Default Expressions" in sem.ads.
8709 -- Set In_Default_Expression for per-object case ???
8711 Arg := Expression (Arg1);
8712 Analyze_Per_Use_Expression (Arg, Any_Integer);
8714 if not Is_Static_Expression (Arg) then
8715 Check_Restriction (Static_Storage_Size, Arg);
8718 if Nkind (P) /= N_Task_Definition then
8723 if Has_Storage_Size_Pragma (P) then
8724 Error_Pragma ("duplicate pragma% not allowed");
8726 Set_Has_Storage_Size_Pragma (P, True);
8729 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8730 -- ??? exp_ch9 should use this!
8738 -- pragma Storage_Unit (NUMERIC_LITERAL);
8740 -- Only permitted argument is System'Storage_Unit value
8742 when Pragma_Storage_Unit =>
8743 Check_No_Identifiers;
8744 Check_Arg_Count (1);
8745 Check_Arg_Is_Integer_Literal (Arg1);
8747 if Intval (Expression (Arg1)) /=
8748 UI_From_Int (Ttypes.System_Storage_Unit)
8750 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
8752 ("the only allowed argument for pragma% is ^", Arg1);
8755 --------------------
8756 -- Stream_Convert --
8757 --------------------
8759 -- pragma Stream_Convert (
8760 -- [Entity =>] type_LOCAL_NAME,
8761 -- [Read =>] function_NAME,
8762 -- [Write =>] function NAME);
8764 when Pragma_Stream_Convert => Stream_Convert : declare
8766 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
8767 -- Check that the given argument is the name of a local
8768 -- function of one argument that is not overloaded earlier
8769 -- in the current local scope. A check is also made that the
8770 -- argument is a function with one parameter.
8772 --------------------------------------
8773 -- Check_OK_Stream_Convert_Function --
8774 --------------------------------------
8776 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
8780 Check_Arg_Is_Local_Name (Arg);
8781 Ent := Entity (Expression (Arg));
8783 if Has_Homonym (Ent) then
8785 ("argument for pragma% may not be overloaded", Arg);
8788 if Ekind (Ent) /= E_Function
8789 or else No (First_Formal (Ent))
8790 or else Present (Next_Formal (First_Formal (Ent)))
8793 ("argument for pragma% must be" &
8794 " function of one argument", Arg);
8796 end Check_OK_Stream_Convert_Function;
8798 -- Start of procecessing for Stream_Convert
8802 Check_Arg_Count (3);
8803 Check_Optional_Identifier (Arg1, Name_Entity);
8804 Check_Optional_Identifier (Arg2, Name_Read);
8805 Check_Optional_Identifier (Arg3, Name_Write);
8806 Check_Arg_Is_Local_Name (Arg1);
8807 Check_OK_Stream_Convert_Function (Arg2);
8808 Check_OK_Stream_Convert_Function (Arg3);
8811 Typ : constant Entity_Id :=
8812 Underlying_Type (Entity (Expression (Arg1)));
8813 Read : constant Entity_Id := Entity (Expression (Arg2));
8814 Write : constant Entity_Id := Entity (Expression (Arg3));
8817 if Etype (Typ) = Any_Type
8819 Etype (Read) = Any_Type
8821 Etype (Write) = Any_Type
8826 Check_First_Subtype (Arg1);
8828 if Rep_Item_Too_Early (Typ, N)
8830 Rep_Item_Too_Late (Typ, N)
8835 if Underlying_Type (Etype (Read)) /= Typ then
8837 ("incorrect return type for function&", Arg2);
8840 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
8842 ("incorrect parameter type for function&", Arg3);
8845 if Underlying_Type (Etype (First_Formal (Read))) /=
8846 Underlying_Type (Etype (Write))
8849 ("result type of & does not match Read parameter type",
8855 -------------------------
8856 -- Style_Checks (GNAT) --
8857 -------------------------
8859 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
8861 -- This is processed by the parser since some of the style
8862 -- checks take place during source scanning and parsing. This
8863 -- means that we don't need to issue error messages here.
8865 when Pragma_Style_Checks => Style_Checks : declare
8866 A : constant Node_Id := Expression (Arg1);
8872 Check_No_Identifiers;
8874 -- Two argument form
8876 if Arg_Count = 2 then
8877 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
8884 E_Id := Expression (Arg2);
8887 if not Is_Entity_Name (E_Id) then
8889 ("second argument of pragma% must be entity name",
8899 Set_Suppress_Style_Checks (E,
8900 (Chars (Expression (Arg1)) = Name_Off));
8901 exit when No (Homonym (E));
8907 -- One argument form
8910 Check_Arg_Count (1);
8912 if Nkind (A) = N_String_Literal then
8916 Slen : constant Natural := Natural (String_Length (S));
8917 Options : String (1 .. Slen);
8923 C := Get_String_Char (S, Int (J));
8924 exit when not In_Character_Range (C);
8925 Options (J) := Get_Character (C);
8928 Set_Style_Check_Options (Options);
8936 elsif Nkind (A) = N_Identifier then
8938 if Chars (A) = Name_All_Checks then
8939 Set_Default_Style_Check_Options;
8941 elsif Chars (A) = Name_On then
8942 Style_Check := True;
8944 elsif Chars (A) = Name_Off then
8945 Style_Check := False;
8956 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
8958 when Pragma_Subtitle =>
8960 Check_Arg_Count (1);
8961 Check_Optional_Identifier (Arg1, Name_Subtitle);
8962 Check_Arg_Is_String_Literal (Arg1);
8968 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
8970 when Pragma_Suppress =>
8971 Process_Suppress_Unsuppress (True);
8977 -- pragma Suppress_All;
8979 -- The only check made here is that the pragma appears in the
8980 -- proper place, i.e. following a compilation unit. If indeed
8981 -- it appears in this context, then the parser has already
8982 -- inserted an equivalent pragma Suppress (All_Checks) to get
8983 -- the required effect.
8985 when Pragma_Suppress_All =>
8987 Check_Arg_Count (0);
8989 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
8990 or else not Is_List_Member (N)
8991 or else List_Containing (N) /= Pragmas_After (Parent (N))
8994 ("misplaced pragma%, must follow compilation unit");
8997 -------------------------
8998 -- Suppress_Debug_Info --
8999 -------------------------
9001 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
9003 when Pragma_Suppress_Debug_Info =>
9005 Check_Arg_Count (1);
9006 Check_Arg_Is_Local_Name (Arg1);
9007 Check_Optional_Identifier (Arg1, Name_Entity);
9008 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
9010 ----------------------------------
9011 -- Suppress_Exception_Locations --
9012 ----------------------------------
9014 -- pragma Suppress_Exception_Locations;
9016 when Pragma_Suppress_Exception_Locations =>
9018 Check_Arg_Count (0);
9019 Check_Valid_Configuration_Pragma;
9020 Exception_Locations_Suppressed := True;
9022 -----------------------------
9023 -- Suppress_Initialization --
9024 -----------------------------
9026 -- pragma Suppress_Initialization ([Entity =>] type_Name);
9028 when Pragma_Suppress_Initialization => Suppress_Init : declare
9034 Check_Arg_Count (1);
9035 Check_Optional_Identifier (Arg1, Name_Entity);
9036 Check_Arg_Is_Local_Name (Arg1);
9038 E_Id := Expression (Arg1);
9040 if Etype (E_Id) = Any_Type then
9047 if Is_Incomplete_Or_Private_Type (E) then
9048 if No (Full_View (Base_Type (E))) then
9050 ("argument of pragma% cannot be an incomplete type",
9053 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
9056 Set_Suppress_Init_Proc (Base_Type (E));
9061 ("pragma% requires argument that is a type name", Arg1);
9069 -- pragma System_Name (DIRECT_NAME);
9071 -- Syntax check: one argument, which must be the identifier GNAT
9072 -- or the identifier GCC, no other identifiers are acceptable.
9074 when Pragma_System_Name =>
9075 Check_No_Identifiers;
9076 Check_Arg_Count (1);
9077 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
9079 -----------------------------
9080 -- Task_Dispatching_Policy --
9081 -----------------------------
9083 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
9085 when Pragma_Task_Dispatching_Policy => declare
9089 Check_Ada_83_Warning;
9090 Check_Arg_Count (1);
9091 Check_No_Identifiers;
9092 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9093 Check_Valid_Configuration_Pragma;
9094 Get_Name_String (Chars (Expression (Arg1)));
9095 DP := Fold_Upper (Name_Buffer (1));
9097 if Task_Dispatching_Policy /= ' '
9098 and then Task_Dispatching_Policy /= DP
9100 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9102 ("task dispatching policy incompatible with policy#");
9104 -- Set new policy, but always preserve System_Location since
9105 -- we like the error message with the run time name.
9108 Task_Dispatching_Policy := DP;
9110 if Task_Dispatching_Policy_Sloc /= System_Location then
9111 Task_Dispatching_Policy_Sloc := Loc;
9120 -- pragma Task_Info (EXPRESSION);
9122 when Pragma_Task_Info => Task_Info : declare
9123 P : constant Node_Id := Parent (N);
9128 if Nkind (P) /= N_Task_Definition then
9129 Error_Pragma ("pragma% must appear in task definition");
9132 Check_No_Identifiers;
9133 Check_Arg_Count (1);
9135 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
9137 if Etype (Expression (Arg1)) = Any_Type then
9141 if Has_Task_Info_Pragma (P) then
9142 Error_Pragma ("duplicate pragma% not allowed");
9144 Set_Has_Task_Info_Pragma (P, True);
9152 -- pragma Task_Name (string_EXPRESSION);
9154 when Pragma_Task_Name => Task_Name : declare
9155 -- pragma Priority (EXPRESSION);
9157 P : constant Node_Id := Parent (N);
9161 Check_No_Identifiers;
9162 Check_Arg_Count (1);
9164 Arg := Expression (Arg1);
9165 Analyze_And_Resolve (Arg, Standard_String);
9167 if Nkind (P) /= N_Task_Definition then
9171 if Has_Task_Name_Pragma (P) then
9172 Error_Pragma ("duplicate pragma% not allowed");
9174 Set_Has_Task_Name_Pragma (P, True);
9175 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9183 -- pragma Task_Storage (
9184 -- [Task_Type =>] LOCAL_NAME,
9185 -- [Top_Guard =>] static_integer_EXPRESSION);
9187 when Pragma_Task_Storage => Task_Storage : declare
9188 Args : Args_List (1 .. 2);
9189 Names : constant Name_List (1 .. 2) := (
9193 Task_Type : Node_Id renames Args (1);
9194 Top_Guard : Node_Id renames Args (2);
9200 Gather_Associations (Names, Args);
9202 if No (Task_Type) then
9204 ("missing task_type argument for pragma%");
9207 Check_Arg_Is_Local_Name (Task_Type);
9209 Ent := Entity (Task_Type);
9211 if not Is_Task_Type (Ent) then
9213 ("argument for pragma% must be task type", Task_Type);
9216 if No (Top_Guard) then
9218 ("pragma% takes two arguments", Task_Type);
9220 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
9223 Check_First_Subtype (Task_Type);
9225 if Rep_Item_Too_Late (Ent, N) then
9234 -- pragma Thread_Body
9235 -- ( [Entity =>] LOCAL_NAME
9236 -- [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);
9238 when Pragma_Thread_Body => Thread_Body : declare
9245 Check_At_Least_N_Arguments (1);
9246 Check_At_Most_N_Arguments (2);
9247 Check_Optional_Identifier (Arg1, Name_Entity);
9248 Check_Arg_Is_Local_Name (Arg1);
9250 Id := Expression (Arg1);
9252 if not Is_Entity_Name (Id)
9253 or else not Is_Subprogram (Entity (Id))
9255 Error_Pragma_Arg ("subprogram name required", Arg1);
9260 -- Go to renamed subprogram if present, since Thread_Body applies
9261 -- to the actual renamed entity, not to the renaming entity.
9263 if Present (Alias (E))
9264 and then Nkind (Parent (Declaration_Node (E))) =
9265 N_Subprogram_Renaming_Declaration
9270 -- Various error checks
9272 if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
9274 ("pragma% requires separate spec and must come before body");
9276 elsif Rep_Item_Too_Early (E, N)
9278 Rep_Item_Too_Late (E, N)
9282 elsif Is_Thread_Body (E) then
9284 ("only one thread body pragma allowed", Arg1);
9286 elsif Present (Homonym (E))
9287 and then Scope (Homonym (E)) = Current_Scope
9290 ("thread body subprogram must not be overloaded", Arg1);
9293 Set_Is_Thread_Body (E);
9295 -- Deal with secondary stack argument
9297 if Arg_Count = 2 then
9298 Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
9299 SS := Expression (Arg2);
9300 Analyze_And_Resolve (SS, Any_Integer);
9308 -- pragma Time_Slice (static_duration_EXPRESSION);
9310 when Pragma_Time_Slice => Time_Slice : declare
9316 Check_Arg_Count (1);
9317 Check_No_Identifiers;
9318 Check_In_Main_Program;
9319 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
9321 if not Error_Posted (Arg1) then
9323 while Present (Nod) loop
9324 if Nkind (Nod) = N_Pragma
9325 and then Chars (Nod) = Name_Time_Slice
9327 Error_Msg_Name_1 := Chars (N);
9328 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9335 -- Process only if in main unit
9337 if Get_Source_Unit (Loc) = Main_Unit then
9338 Opt.Time_Slice_Set := True;
9339 Val := Expr_Value_R (Expression (Arg1));
9341 if Val <= Ureal_0 then
9342 Opt.Time_Slice_Value := 0;
9344 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
9345 Opt.Time_Slice_Value := 1_000_000_000;
9348 Opt.Time_Slice_Value :=
9349 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
9358 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
9360 -- TITLING_OPTION ::=
9361 -- [Title =>] STRING_LITERAL
9362 -- | [Subtitle =>] STRING_LITERAL
9364 when Pragma_Title => Title : declare
9365 Args : Args_List (1 .. 2);
9366 Names : constant Name_List (1 .. 2) := (
9372 Gather_Associations (Names, Args);
9374 for J in 1 .. 2 loop
9375 if Present (Args (J)) then
9376 Check_Arg_Is_String_Literal (Args (J));
9381 ---------------------
9382 -- Unchecked_Union --
9383 ---------------------
9385 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
9387 when Pragma_Unchecked_Union => Unchecked_Union : declare
9388 Assoc : constant Node_Id := Arg1;
9389 Type_Id : constant Node_Id := Expression (Assoc);
9400 Check_No_Identifiers;
9401 Check_Arg_Count (1);
9402 Check_Arg_Is_Local_Name (Arg1);
9404 Find_Type (Type_Id);
9405 Typ := Entity (Type_Id);
9408 or else Rep_Item_Too_Early (Typ, N)
9412 Typ := Underlying_Type (Typ);
9415 if Rep_Item_Too_Late (Typ, N) then
9419 Check_First_Subtype (Arg1);
9421 -- Note remaining cases are references to a type in the current
9422 -- declarative part. If we find an error, we post the error on
9423 -- the relevant type declaration at an appropriate point.
9425 if not Is_Record_Type (Typ) then
9426 Error_Msg_N ("Unchecked_Union must be record type", Typ);
9429 elsif Is_Tagged_Type (Typ) then
9430 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
9433 elsif Is_Limited_Type (Typ) then
9435 ("Unchecked_Union must not be limited record type", Typ);
9436 Explain_Limited_Type (Typ, Typ);
9440 if not Has_Discriminants (Typ) then
9442 ("Unchecked_Union must have one discriminant", Typ);
9446 Discr := First_Discriminant (Typ);
9448 if Present (Next_Discriminant (Discr)) then
9450 ("Unchecked_Union must have exactly one discriminant",
9451 Next_Discriminant (Discr));
9455 if No (Discriminant_Default_Value (Discr)) then
9457 ("Unchecked_Union discriminant must have default value",
9461 Tdef := Type_Definition (Declaration_Node (Typ));
9462 Clist := Component_List (Tdef);
9464 if No (Clist) or else No (Variant_Part (Clist)) then
9466 ("Unchecked_Union must have variant part",
9471 Vpart := Variant_Part (Clist);
9473 if Is_Non_Empty_List (Component_Items (Clist)) then
9475 ("components before variant not allowed " &
9476 "in Unchecked_Union",
9477 First (Component_Items (Clist)));
9480 Variant := First (Variants (Vpart));
9481 while Present (Variant) loop
9482 Clist := Component_List (Variant);
9484 if Present (Variant_Part (Clist)) then
9486 ("Unchecked_Union may not have nested variants",
9487 Variant_Part (Clist));
9490 if not Is_Non_Empty_List (Component_Items (Clist)) then
9492 ("Unchecked_Union may not have empty component list",
9497 Comp := First (Component_Items (Clist));
9499 if Nkind (Comp) = N_Component_Declaration then
9501 if Present (Expression (Comp)) then
9503 ("default initialization not allowed " &
9504 "in Unchecked_Union",
9509 Sindic : constant Node_Id :=
9510 Subtype_Indication (Component_Definition (Comp));
9513 if Nkind (Sindic) = N_Subtype_Indication then
9514 Check_Static_Constraint (Constraint (Sindic));
9519 if Present (Next (Comp)) then
9521 ("Unchecked_Union variant can have only one component",
9529 Set_Is_Unchecked_Union (Typ, True);
9530 Set_Convention (Typ, Convention_C);
9532 Set_Has_Unchecked_Union (Base_Type (Typ), True);
9533 Set_Is_Unchecked_Union (Base_Type (Typ), True);
9534 end Unchecked_Union;
9536 ------------------------
9537 -- Unimplemented_Unit --
9538 ------------------------
9540 -- pragma Unimplemented_Unit;
9542 -- Note: this only gives an error if we are generating code,
9543 -- or if we are in a generic library unit (where the pragma
9544 -- appears in the body, not in the spec).
9546 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
9547 Cunitent : constant Entity_Id :=
9548 Cunit_Entity (Get_Source_Unit (Loc));
9549 Ent_Kind : constant Entity_Kind :=
9554 Check_Arg_Count (0);
9556 if Operating_Mode = Generate_Code
9557 or else Ent_Kind = E_Generic_Function
9558 or else Ent_Kind = E_Generic_Procedure
9559 or else Ent_Kind = E_Generic_Package
9561 Get_Name_String (Chars (Cunitent));
9562 Set_Casing (Mixed_Case);
9563 Write_Str (Name_Buffer (1 .. Name_Len));
9564 Write_Str (" is not implemented");
9566 raise Unrecoverable_Error;
9568 end Unimplemented_Unit;
9570 --------------------
9571 -- Universal_Data --
9572 --------------------
9574 -- pragma Universal_Data [(library_unit_NAME)];
9576 when Pragma_Universal_Data =>
9579 -- If this is a configuration pragma, then set the universal
9580 -- addressing option, otherwise confirm that the pragma
9581 -- satisfies the requirements of library unit pragma placement
9582 -- and leave it to the GNAAMP back end to detect the pragma
9583 -- (avoids transitive setting of the option due to withed units).
9585 if Is_Configuration_Pragma then
9586 Universal_Addressing_On_AAMP := True;
9588 Check_Valid_Library_Unit_Pragma;
9591 if not AAMP_On_Target then
9592 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
9599 -- pragma Unreferenced (local_Name {, local_Name});
9601 when Pragma_Unreferenced => Unreferenced : declare
9604 Arg_Ent : Entity_Id;
9608 Check_At_Least_N_Arguments (1);
9612 while Present (Arg_Node) loop
9613 Check_No_Identifier (Arg_Node);
9615 -- Note that the analyze call done by Check_Arg_Is_Local_Name
9616 -- will in fact generate a reference, so that the entity will
9617 -- have a reference, which will inhibit any warnings about it
9618 -- not being referenced, and also properly show up in the ali
9619 -- file as a reference. But this reference is recorded before
9620 -- the Has_Pragma_Unreferenced flag is set, so that no warning
9621 -- is generated for this reference.
9623 Check_Arg_Is_Local_Name (Arg_Node);
9624 Arg_Expr := Get_Pragma_Arg (Arg_Node);
9626 if Is_Entity_Name (Arg_Expr) then
9627 Arg_Ent := Entity (Arg_Expr);
9629 -- If the entity is overloaded, the pragma applies to the
9630 -- most recent overloading, as documented. In this case,
9631 -- name resolution does not generate a reference, so it
9632 -- must be done here explicitly.
9634 if Is_Overloaded (Arg_Expr) then
9635 Generate_Reference (Arg_Ent, N);
9638 Set_Has_Pragma_Unreferenced (Arg_Ent);
9645 ------------------------------
9646 -- Unreserve_All_Interrupts --
9647 ------------------------------
9649 -- pragma Unreserve_All_Interrupts;
9651 when Pragma_Unreserve_All_Interrupts =>
9653 Check_Arg_Count (0);
9655 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
9656 Unreserve_All_Interrupts := True;
9663 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
9665 when Pragma_Unsuppress =>
9667 Process_Suppress_Unsuppress (False);
9673 -- pragma Use_VADS_Size;
9675 when Pragma_Use_VADS_Size =>
9677 Check_Arg_Count (0);
9678 Check_Valid_Configuration_Pragma;
9679 Use_VADS_Size := True;
9681 ---------------------
9682 -- Validity_Checks --
9683 ---------------------
9685 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
9687 when Pragma_Validity_Checks => Validity_Checks : declare
9688 A : constant Node_Id := Expression (Arg1);
9694 Check_Arg_Count (1);
9695 Check_No_Identifiers;
9697 if Nkind (A) = N_String_Literal then
9701 Slen : constant Natural := Natural (String_Length (S));
9702 Options : String (1 .. Slen);
9708 C := Get_String_Char (S, Int (J));
9709 exit when not In_Character_Range (C);
9710 Options (J) := Get_Character (C);
9713 Set_Validity_Check_Options (Options);
9721 elsif Nkind (A) = N_Identifier then
9723 if Chars (A) = Name_All_Checks then
9724 Set_Validity_Check_Options ("a");
9726 elsif Chars (A) = Name_On then
9727 Validity_Checks_On := True;
9729 elsif Chars (A) = Name_Off then
9730 Validity_Checks_On := False;
9734 end Validity_Checks;
9740 -- pragma Volatile (LOCAL_NAME);
9742 when Pragma_Volatile =>
9743 Process_Atomic_Shared_Volatile;
9745 -------------------------
9746 -- Volatile_Components --
9747 -------------------------
9749 -- pragma Volatile_Components (array_LOCAL_NAME);
9751 -- Volatile is handled by the same circuit as Atomic_Components
9757 -- pragma Warnings (On | Off, [LOCAL_NAME])
9759 when Pragma_Warnings => Warnings : begin
9761 Check_At_Least_N_Arguments (1);
9762 Check_At_Most_N_Arguments (2);
9763 Check_No_Identifiers;
9765 -- One argument case was processed by parser in Par.Prag
9767 if Arg_Count /= 1 then
9768 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9769 Check_Arg_Count (2);
9776 E_Id := Expression (Arg2);
9779 -- In the expansion of an inlined body, a reference to
9780 -- the formal may be wrapped in a conversion if the actual
9781 -- is a conversion. Retrieve the real entity name.
9783 if (In_Instance_Body
9784 or else In_Inlined_Body)
9785 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
9787 E_Id := Expression (E_Id);
9790 if not Is_Entity_Name (E_Id) then
9792 ("second argument of pragma% must be entity name",
9802 Set_Warnings_Off (E,
9803 (Chars (Expression (Arg1)) = Name_Off));
9805 if Is_Enumeration_Type (E) then
9807 Lit : Entity_Id := First_Literal (E);
9810 while Present (Lit) loop
9811 Set_Warnings_Off (Lit);
9817 exit when No (Homonym (E));
9829 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
9831 when Pragma_Weak_External => Weak_External : declare
9836 Check_Arg_Count (1);
9837 Check_Optional_Identifier (Arg1, Name_Entity);
9838 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9839 Ent := Entity (Expression (Arg1));
9841 if Rep_Item_Too_Early (Ent, N) then
9844 Ent := Underlying_Type (Ent);
9847 -- The only processing required is to link this item on to the
9848 -- list of rep items for the given entity. This is accomplished
9849 -- by the call to Rep_Item_Too_Late (when no error is detected
9850 -- and False is returned).
9852 if Rep_Item_Too_Late (Ent, N) then
9855 Set_Has_Gigi_Rep_Item (Ent);
9859 --------------------
9860 -- Unknown_Pragma --
9861 --------------------
9863 -- Should be impossible, since the case of an unknown pragma is
9864 -- separately processed before the case statement is entered.
9866 when Unknown_Pragma =>
9867 raise Program_Error;
9872 when Pragma_Exit => null;
9875 ---------------------------------
9876 -- Delay_Config_Pragma_Analyze --
9877 ---------------------------------
9879 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
9881 return Chars (N) = Name_Interrupt_State;
9882 end Delay_Config_Pragma_Analyze;
9884 -------------------------
9885 -- Get_Base_Subprogram --
9886 -------------------------
9888 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
9894 -- Follow subprogram renaming chain
9896 while Is_Subprogram (Result)
9898 (Is_Generic_Instance (Result)
9899 or else Nkind (Parent (Declaration_Node (Result))) =
9900 N_Subprogram_Renaming_Declaration)
9901 and then Present (Alias (Result))
9903 Result := Alias (Result);
9907 end Get_Base_Subprogram;
9909 -----------------------------------------
9910 -- Is_Non_Significant_Pragma_Reference --
9911 -----------------------------------------
9913 -- This function makes use of the following static table which indicates
9914 -- whether a given pragma is significant. A value of -1 in this table
9915 -- indicates that the reference is significant. A value of zero indicates
9916 -- than appearence as any argument is insignificant, a positive value
9917 -- indicates that appearence in that parameter position is significant.
9919 Sig_Flags : constant array (Pragma_Id) of Int :=
9920 (Pragma_AST_Entry => -1,
9921 Pragma_Abort_Defer => -1,
9922 Pragma_Ada_83 => -1,
9923 Pragma_Ada_95 => -1,
9924 Pragma_All_Calls_Remote => -1,
9925 Pragma_Annotate => -1,
9926 Pragma_Assert => -1,
9927 Pragma_Asynchronous => -1,
9929 Pragma_Atomic_Components => 0,
9930 Pragma_Attach_Handler => -1,
9931 Pragma_CPP_Class => 0,
9932 Pragma_CPP_Constructor => 0,
9933 Pragma_CPP_Virtual => 0,
9934 Pragma_CPP_Vtable => 0,
9935 Pragma_C_Pass_By_Copy => 0,
9936 Pragma_Comment => 0,
9937 Pragma_Common_Object => -1,
9938 Pragma_Compile_Time_Warning => -1,
9939 Pragma_Complex_Representation => 0,
9940 Pragma_Component_Alignment => -1,
9941 Pragma_Controlled => 0,
9942 Pragma_Convention => 0,
9943 Pragma_Convention_Identifier => 0,
9945 Pragma_Discard_Names => 0,
9946 Pragma_Elaborate => -1,
9947 Pragma_Elaborate_All => -1,
9948 Pragma_Elaborate_Body => -1,
9949 Pragma_Elaboration_Checks => -1,
9950 Pragma_Eliminate => -1,
9951 Pragma_Explicit_Overriding => -1,
9952 Pragma_Export => -1,
9953 Pragma_Export_Exception => -1,
9954 Pragma_Export_Function => -1,
9955 Pragma_Export_Object => -1,
9956 Pragma_Export_Procedure => -1,
9957 Pragma_Export_Value => -1,
9958 Pragma_Export_Valued_Procedure => -1,
9959 Pragma_Extend_System => -1,
9960 Pragma_Extensions_Allowed => -1,
9961 Pragma_External => -1,
9962 Pragma_External_Name_Casing => -1,
9963 Pragma_Finalize_Storage_Only => 0,
9964 Pragma_Float_Representation => 0,
9966 Pragma_Import => +2,
9967 Pragma_Import_Exception => 0,
9968 Pragma_Import_Function => 0,
9969 Pragma_Import_Object => 0,
9970 Pragma_Import_Procedure => 0,
9971 Pragma_Import_Valued_Procedure => 0,
9972 Pragma_Initialize_Scalars => -1,
9974 Pragma_Inline_Always => 0,
9975 Pragma_Inline_Generic => 0,
9976 Pragma_Inspection_Point => -1,
9977 Pragma_Interface => +2,
9978 Pragma_Interface_Name => +2,
9979 Pragma_Interrupt_Handler => -1,
9980 Pragma_Interrupt_Priority => -1,
9981 Pragma_Interrupt_State => -1,
9982 Pragma_Java_Constructor => -1,
9983 Pragma_Java_Interface => -1,
9984 Pragma_Keep_Names => 0,
9985 Pragma_License => -1,
9986 Pragma_Link_With => -1,
9987 Pragma_Linker_Alias => -1,
9988 Pragma_Linker_Options => -1,
9989 Pragma_Linker_Section => -1,
9991 Pragma_Locking_Policy => -1,
9992 Pragma_Long_Float => -1,
9993 Pragma_Machine_Attribute => -1,
9995 Pragma_Main_Storage => -1,
9996 Pragma_Memory_Size => -1,
9997 Pragma_No_Return => 0,
9998 Pragma_No_Run_Time => -1,
9999 Pragma_No_Strict_Aliasing => -1,
10000 Pragma_Normalize_Scalars => -1,
10001 Pragma_Obsolescent => 0,
10002 Pragma_Optimize => -1,
10003 Pragma_Optional_Overriding => -1,
10004 Pragma_Overriding => -1,
10007 Pragma_Passive => -1,
10008 Pragma_Polling => -1,
10009 Pragma_Persistent_Data => -1,
10010 Pragma_Persistent_Object => -1,
10011 Pragma_Preelaborate => -1,
10012 Pragma_Priority => -1,
10013 Pragma_Profile => 0,
10014 Pragma_Propagate_Exceptions => -1,
10015 Pragma_Psect_Object => -1,
10017 Pragma_Pure_Function => 0,
10018 Pragma_Queuing_Policy => -1,
10019 Pragma_Ravenscar => -1,
10020 Pragma_Remote_Call_Interface => -1,
10021 Pragma_Remote_Types => -1,
10022 Pragma_Restricted_Run_Time => -1,
10023 Pragma_Restriction_Warnings => -1,
10024 Pragma_Restrictions => -1,
10025 Pragma_Reviewable => -1,
10026 Pragma_Share_Generic => -1,
10027 Pragma_Shared => -1,
10028 Pragma_Shared_Passive => -1,
10029 Pragma_Source_File_Name => -1,
10030 Pragma_Source_File_Name_Project => -1,
10031 Pragma_Source_Reference => -1,
10032 Pragma_Storage_Size => -1,
10033 Pragma_Storage_Unit => -1,
10034 Pragma_Stream_Convert => -1,
10035 Pragma_Style_Checks => -1,
10036 Pragma_Subtitle => -1,
10037 Pragma_Suppress => 0,
10038 Pragma_Suppress_Exception_Locations => 0,
10039 Pragma_Suppress_All => -1,
10040 Pragma_Suppress_Debug_Info => 0,
10041 Pragma_Suppress_Initialization => 0,
10042 Pragma_System_Name => -1,
10043 Pragma_Task_Dispatching_Policy => -1,
10044 Pragma_Task_Info => -1,
10045 Pragma_Task_Name => -1,
10046 Pragma_Task_Storage => 0,
10047 Pragma_Thread_Body => +2,
10048 Pragma_Time_Slice => -1,
10049 Pragma_Title => -1,
10050 Pragma_Unchecked_Union => -1,
10051 Pragma_Unimplemented_Unit => -1,
10052 Pragma_Universal_Data => -1,
10053 Pragma_Unreferenced => -1,
10054 Pragma_Unreserve_All_Interrupts => -1,
10055 Pragma_Unsuppress => 0,
10056 Pragma_Use_VADS_Size => -1,
10057 Pragma_Validity_Checks => -1,
10058 Pragma_Volatile => 0,
10059 Pragma_Volatile_Components => 0,
10060 Pragma_Warnings => -1,
10061 Pragma_Weak_External => 0,
10062 Unknown_Pragma => 0);
10064 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
10072 if Nkind (P) /= N_Pragma_Argument_Association then
10076 C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
10086 A := First (Pragma_Argument_Associations (Parent (P)));
10087 for J in 1 .. C - 1 loop
10098 end Is_Non_Significant_Pragma_Reference;
10100 ------------------------------
10101 -- Is_Pragma_String_Literal --
10102 ------------------------------
10104 -- This function returns true if the corresponding pragma argument is
10105 -- a static string expression. These are the only cases in which string
10106 -- literals can appear as pragma arguments. We also allow a string
10107 -- literal as the first argument to pragma Assert (although it will
10108 -- of course always generate a type error).
10110 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
10111 Pragn : constant Node_Id := Parent (Par);
10112 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
10113 Pname : constant Name_Id := Chars (Pragn);
10119 N := First (Assoc);
10126 if Pname = Name_Assert then
10129 elsif Pname = Name_Export then
10132 elsif Pname = Name_Ident then
10135 elsif Pname = Name_Import then
10138 elsif Pname = Name_Interface_Name then
10141 elsif Pname = Name_Linker_Alias then
10144 elsif Pname = Name_Linker_Section then
10147 elsif Pname = Name_Machine_Attribute then
10150 elsif Pname = Name_Source_File_Name then
10153 elsif Pname = Name_Source_Reference then
10156 elsif Pname = Name_Title then
10159 elsif Pname = Name_Subtitle then
10165 end Is_Pragma_String_Literal;
10167 --------------------------------------
10168 -- Process_Compilation_Unit_Pragmas --
10169 --------------------------------------
10171 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
10173 -- A special check for pragma Suppress_All. This is a strange DEC
10174 -- pragma, strange because it comes at the end of the unit. If we
10175 -- have a pragma Suppress_All in the Pragmas_After of the current
10176 -- unit, then we insert a pragma Suppress (All_Checks) at the start
10177 -- of the context clause to ensure the correct processing.
10180 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
10184 if Present (PA) then
10186 while Present (P) loop
10187 if Chars (P) = Name_Suppress_All then
10188 Prepend_To (Context_Items (N),
10189 Make_Pragma (Sloc (P),
10190 Chars => Name_Suppress,
10191 Pragma_Argument_Associations => New_List (
10192 Make_Pragma_Argument_Association (Sloc (P),
10194 Make_Identifier (Sloc (P),
10195 Chars => Name_All_Checks)))));
10203 end Process_Compilation_Unit_Pragmas;
10205 --------------------------------
10206 -- Set_Encoded_Interface_Name --
10207 --------------------------------
10209 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
10210 Str : constant String_Id := Strval (S);
10211 Len : constant Int := String_Length (Str);
10216 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
10219 -- Stores encoded value of character code CC. The encoding we
10220 -- use an underscore followed by four lower case hex digits.
10222 procedure Encode is
10224 Store_String_Char (Get_Char_Code ('_'));
10226 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
10228 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
10230 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
10232 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
10235 -- Start of processing for Set_Encoded_Interface_Name
10238 -- If first character is asterisk, this is a link name, and we
10239 -- leave it completely unmodified. We also ignore null strings
10240 -- (the latter case happens only in error cases) and no encoding
10241 -- should occur for Java interface names.
10244 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
10247 Set_Interface_Name (E, S);
10252 CC := Get_String_Char (Str, J);
10254 exit when not In_Character_Range (CC);
10256 C := Get_Character (CC);
10258 exit when C /= '_' and then C /= '$'
10259 and then C not in '0' .. '9'
10260 and then C not in 'a' .. 'z'
10261 and then C not in 'A' .. 'Z';
10264 Set_Interface_Name (E, S);
10272 -- Here we need to encode. The encoding we use as follows:
10273 -- three underscores + four hex digits (lower case)
10277 for J in 1 .. String_Length (Str) loop
10278 CC := Get_String_Char (Str, J);
10280 if not In_Character_Range (CC) then
10283 C := Get_Character (CC);
10285 if C = '_' or else C = '$'
10286 or else C in '0' .. '9'
10287 or else C in 'a' .. 'z'
10288 or else C in 'A' .. 'Z'
10290 Store_String_Char (CC);
10297 Set_Interface_Name (E,
10298 Make_String_Literal (Sloc (S),
10299 Strval => End_String));
10301 end Set_Encoded_Interface_Name;
10303 -------------------
10304 -- Set_Unit_Name --
10305 -------------------
10307 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
10312 if Nkind (N) = N_Identifier
10313 and then Nkind (With_Item) = N_Identifier
10315 Set_Entity (N, Entity (With_Item));
10317 elsif Nkind (N) = N_Selected_Component then
10318 Change_Selected_Component_To_Expanded_Name (N);
10319 Set_Entity (N, Entity (With_Item));
10320 Set_Entity (Selector_Name (N), Entity (N));
10322 Pref := Prefix (N);
10323 Scop := Scope (Entity (N));
10325 while Nkind (Pref) = N_Selected_Component loop
10326 Change_Selected_Component_To_Expanded_Name (Pref);
10327 Set_Entity (Selector_Name (Pref), Scop);
10328 Set_Entity (Pref, Scop);
10329 Pref := Prefix (Pref);
10330 Scop := Scope (Scop);
10333 Set_Entity (Pref, Scop);