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;
1695 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 compilation unit.
1912 -- Is the test of compilation unit really necessary ???
1913 -- What about subprogram renamings here???
1916 Comp_Unit := Get_Source_Unit (E);
1917 Set_Convention_From_Pragma (E);
1919 -- Treat a pragma Import as an implicit body, for GPS use.
1921 if Prag_Id = Pragma_Import then
1922 Generate_Reference (E, Id, 'b');
1928 exit when No (E1) or else Scope (E1) /= Current_Scope;
1930 -- Note: below we are missing a check for Rep_Item_Too_Late.
1931 -- That is deliberate, we cannot chain the rep item on more
1932 -- than one Rep_Item chain, to be fixed later ???
1934 if Comp_Unit = Get_Source_Unit (E1) then
1935 Set_Convention_From_Pragma (E1);
1937 if Prag_Id = Pragma_Import then
1938 Generate_Reference (E, Id, 'b');
1943 end Process_Convention;
1945 -----------------------------------------------------
1946 -- Process_Extended_Import_Export_Exception_Pragma --
1947 -----------------------------------------------------
1949 procedure Process_Extended_Import_Export_Exception_Pragma
1950 (Arg_Internal : Node_Id;
1951 Arg_External : Node_Id;
1961 if not OpenVMS_On_Target then
1963 ("?pragma% ignored (applies only to Open'V'M'S)");
1966 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
1967 Def_Id := Entity (Arg_Internal);
1969 if Ekind (Def_Id) /= E_Exception then
1971 ("pragma% must refer to declared exception", Arg_Internal);
1974 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
1976 if Present (Arg_Form) then
1977 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
1980 if Present (Arg_Form)
1981 and then Chars (Arg_Form) = Name_Ada
1985 Set_Is_VMS_Exception (Def_Id);
1986 Set_Exception_Code (Def_Id, No_Uint);
1989 if Present (Arg_Code) then
1990 if not Is_VMS_Exception (Def_Id) then
1992 ("Code option for pragma% not allowed for Ada case",
1996 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
1997 Code_Val := Expr_Value (Arg_Code);
1999 if not UI_Is_In_Int_Range (Code_Val) then
2001 ("Code option for pragma% must be in 32-bit range",
2005 Set_Exception_Code (Def_Id, Code_Val);
2008 end Process_Extended_Import_Export_Exception_Pragma;
2010 -------------------------------------------------
2011 -- Process_Extended_Import_Export_Internal_Arg --
2012 -------------------------------------------------
2014 procedure Process_Extended_Import_Export_Internal_Arg
2015 (Arg_Internal : Node_Id := Empty)
2020 if No (Arg_Internal) then
2021 Error_Pragma ("Internal parameter required for pragma%");
2024 if Nkind (Arg_Internal) = N_Identifier then
2027 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2028 and then (Prag_Id = Pragma_Import_Function
2030 Prag_Id = Pragma_Export_Function)
2036 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2039 Check_Arg_Is_Local_Name (Arg_Internal);
2040 end Process_Extended_Import_Export_Internal_Arg;
2042 --------------------------------------------------
2043 -- Process_Extended_Import_Export_Object_Pragma --
2044 --------------------------------------------------
2046 procedure Process_Extended_Import_Export_Object_Pragma
2047 (Arg_Internal : Node_Id;
2048 Arg_External : Node_Id;
2054 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2055 Def_Id := Entity (Arg_Internal);
2057 if Ekind (Def_Id) /= E_Constant
2058 and then Ekind (Def_Id) /= E_Variable
2061 ("pragma% must designate an object", Arg_Internal);
2064 if Is_Psected (Def_Id) then
2066 ("previous Psect_Object applies, pragma % not permitted",
2070 if Rep_Item_Too_Late (Def_Id, N) then
2074 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2076 if Present (Arg_Size)
2077 and then Nkind (Arg_Size) /= N_Identifier
2078 and then Nkind (Arg_Size) /= N_String_Literal
2081 ("pragma% Size argument must be identifier or string literal",
2085 -- Export_Object case
2087 if Prag_Id = Pragma_Export_Object then
2088 if not Is_Library_Level_Entity (Def_Id) then
2090 ("argument for pragma% must be library level entity",
2094 if Ekind (Current_Scope) = E_Generic_Package then
2095 Error_Pragma ("pragma& cannot appear in a generic unit");
2098 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2100 ("exported object must have compile time known size",
2104 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2106 ("?duplicate Export_Object pragma", N);
2108 Set_Exported (Def_Id, Arg_Internal);
2111 -- Import_Object case
2114 if Is_Concurrent_Type (Etype (Def_Id)) then
2116 ("cannot use pragma% for task/protected object",
2120 if Ekind (Def_Id) = E_Constant then
2122 ("cannot import a constant", Arg_Internal);
2125 if Warn_On_Export_Import
2126 and then Has_Discriminants (Etype (Def_Id))
2129 ("imported value must be initialized?", Arg_Internal);
2132 if Warn_On_Export_Import
2133 and then Is_Access_Type (Etype (Def_Id))
2136 ("cannot import object of an access type?", Arg_Internal);
2139 if Warn_On_Export_Import
2140 and then Is_Imported (Def_Id)
2143 ("?duplicate Import_Object pragma", N);
2145 -- Check for explicit initialization present. Note that an
2146 -- initialization that generated by the code generator, e.g.
2147 -- for an access type, does not count here.
2149 elsif Present (Expression (Parent (Def_Id)))
2152 (Original_Node (Expression (Parent (Def_Id))))
2154 Error_Msg_Sloc := Sloc (Def_Id);
2156 ("no initialization allowed for declaration of& #",
2157 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2160 Set_Imported (Def_Id);
2161 Note_Possible_Modification (Arg_Internal);
2164 end Process_Extended_Import_Export_Object_Pragma;
2166 ------------------------------------------------------
2167 -- Process_Extended_Import_Export_Subprogram_Pragma --
2168 ------------------------------------------------------
2170 procedure Process_Extended_Import_Export_Subprogram_Pragma
2171 (Arg_Internal : Node_Id;
2172 Arg_External : Node_Id;
2173 Arg_Parameter_Types : Node_Id;
2174 Arg_Result_Type : Node_Id := Empty;
2175 Arg_Mechanism : Node_Id;
2176 Arg_Result_Mechanism : Node_Id := Empty;
2177 Arg_First_Optional_Parameter : Node_Id := Empty)
2183 Ambiguous : Boolean;
2187 function Same_Base_Type
2189 Formal : Entity_Id) return Boolean;
2190 -- Determines if Ptype references the type of Formal. Note that
2191 -- only the base types need to match according to the spec. Ptype
2192 -- here is the argument from the pragma, which is either a type
2193 -- name, or an access attribute.
2195 --------------------
2196 -- Same_Base_Type --
2197 --------------------
2199 function Same_Base_Type
2201 Formal : Entity_Id) return Boolean
2203 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2207 -- Case where pragma argument is typ'Access
2209 if Nkind (Ptype) = N_Attribute_Reference
2210 and then Attribute_Name (Ptype) = Name_Access
2212 Pref := Prefix (Ptype);
2215 if not Is_Entity_Name (Pref)
2216 or else Entity (Pref) = Any_Type
2221 -- We have a match if the corresponding argument is of an
2222 -- anonymous access type, and its designicated type matches
2223 -- the type of the prefix of the access attribute
2225 return Ekind (Ftyp) = E_Anonymous_Access_Type
2226 and then Base_Type (Entity (Pref)) =
2227 Base_Type (Etype (Designated_Type (Ftyp)));
2229 -- Case where pragma argument is a type name
2234 if not Is_Entity_Name (Ptype)
2235 or else Entity (Ptype) = Any_Type
2240 -- We have a match if the corresponding argument is of
2241 -- the type given in the pragma (comparing base types)
2243 return Base_Type (Entity (Ptype)) = Ftyp;
2247 -- Start of processing for
2248 -- Process_Extended_Import_Export_Subprogram_Pragma
2251 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2252 Hom_Id := Entity (Arg_Internal);
2256 -- Loop through homonyms (overloadings) of Hom_Id
2258 while Present (Hom_Id) loop
2259 Def_Id := Get_Base_Subprogram (Hom_Id);
2261 -- We need a subprogram in the current scope
2263 if not Is_Subprogram (Def_Id)
2264 or else Scope (Def_Id) /= Current_Scope
2271 -- Pragma cannot apply to subprogram body
2273 if Is_Subprogram (Def_Id)
2276 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2279 ("pragma% requires separate spec"
2280 & " and must come before body");
2283 -- Test result type if given, note that the result type
2284 -- parameter can only be present for the function cases.
2286 if Present (Arg_Result_Type)
2287 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2291 elsif Etype (Def_Id) /= Standard_Void_Type
2293 (Chars (N) = Name_Export_Procedure
2294 or else Chars (N) = Name_Import_Procedure)
2298 -- Test parameter types if given. Note that this parameter
2299 -- has not been analyzed (and must not be, since it is
2300 -- semantic nonsense), so we get it as the parser left it.
2302 elsif Present (Arg_Parameter_Types) then
2303 Check_Matching_Types : declare
2308 Formal := First_Formal (Def_Id);
2310 if Nkind (Arg_Parameter_Types) = N_Null then
2311 if Present (Formal) then
2315 -- A list of one type, e.g. (List) is parsed as
2316 -- a parenthesized expression.
2318 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2319 and then Paren_Count (Arg_Parameter_Types) = 1
2322 or else Present (Next_Formal (Formal))
2327 Same_Base_Type (Arg_Parameter_Types, Formal);
2330 -- A list of more than one type is parsed as a aggregate
2332 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2333 and then Paren_Count (Arg_Parameter_Types) = 0
2335 Ptype := First (Expressions (Arg_Parameter_Types));
2336 while Present (Ptype) or else Present (Formal) loop
2339 or else not Same_Base_Type (Ptype, Formal)
2344 Next_Formal (Formal);
2349 -- Anything else is of the wrong form
2353 ("wrong form for Parameter_Types parameter",
2354 Arg_Parameter_Types);
2356 end Check_Matching_Types;
2359 -- Match is now False if the entry we found did not match
2360 -- either a supplied Parameter_Types or Result_Types argument
2366 -- Ambiguous case, the flag Ambiguous shows if we already
2367 -- detected this and output the initial messages.
2370 if not Ambiguous then
2372 Error_Msg_Name_1 := Chars (N);
2374 ("pragma% does not uniquely identify subprogram!",
2376 Error_Msg_Sloc := Sloc (Ent);
2377 Error_Msg_N ("matching subprogram #!", N);
2381 Error_Msg_Sloc := Sloc (Def_Id);
2382 Error_Msg_N ("matching subprogram #!", N);
2387 Hom_Id := Homonym (Hom_Id);
2390 -- See if we found an entry
2393 if not Ambiguous then
2394 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
2396 ("pragma% cannot be given for generic subprogram");
2400 ("pragma% does not identify local subprogram");
2407 -- Import pragmas must be be for imported entities
2409 if Prag_Id = Pragma_Import_Function
2411 Prag_Id = Pragma_Import_Procedure
2413 Prag_Id = Pragma_Import_Valued_Procedure
2415 if not Is_Imported (Ent) then
2417 ("pragma Import or Interface must precede pragma%");
2420 -- Here we have the Export case which can set the entity as exported
2422 -- But does not do so if the specified external name is null,
2423 -- since that is taken as a signal in DEC Ada 83 (with which
2424 -- we want to be compatible) to request no external name.
2426 elsif Nkind (Arg_External) = N_String_Literal
2427 and then String_Length (Strval (Arg_External)) = 0
2431 -- In all other cases, set entit as exported
2434 Set_Exported (Ent, Arg_Internal);
2437 -- Special processing for Valued_Procedure cases
2439 if Prag_Id = Pragma_Import_Valued_Procedure
2441 Prag_Id = Pragma_Export_Valued_Procedure
2443 Formal := First_Formal (Ent);
2447 ("at least one parameter required for pragma%");
2449 elsif Ekind (Formal) /= E_Out_Parameter then
2451 ("first parameter must have mode out for pragma%");
2454 Set_Is_Valued_Procedure (Ent);
2458 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
2460 -- Process Result_Mechanism argument if present. We have already
2461 -- checked that this is only allowed for the function case.
2463 if Present (Arg_Result_Mechanism) then
2464 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
2467 -- Process Mechanism parameter if present. Note that this parameter
2468 -- is not analyzed, and must not be analyzed since it is semantic
2469 -- nonsense, so we get it in exactly as the parser left it.
2471 if Present (Arg_Mechanism) then
2479 -- A single mechanism association without a formal parameter
2480 -- name is parsed as a parenthesized expression. All other
2481 -- cases are parsed as aggregates, so we rewrite the single
2482 -- parameter case as an aggregate for consistency.
2484 if Nkind (Arg_Mechanism) /= N_Aggregate
2485 and then Paren_Count (Arg_Mechanism) = 1
2487 Rewrite (Arg_Mechanism,
2488 Make_Aggregate (Sloc (Arg_Mechanism),
2489 Expressions => New_List (
2490 Relocate_Node (Arg_Mechanism))));
2493 -- Case of only mechanism name given, applies to all formals
2495 if Nkind (Arg_Mechanism) /= N_Aggregate then
2496 Formal := First_Formal (Ent);
2497 while Present (Formal) loop
2498 Set_Mechanism_Value (Formal, Arg_Mechanism);
2499 Next_Formal (Formal);
2502 -- Case of list of mechanism associations given
2505 if Null_Record_Present (Arg_Mechanism) then
2507 ("inappropriate form for Mechanism parameter",
2511 -- Deal with positional ones first
2513 Formal := First_Formal (Ent);
2514 if Present (Expressions (Arg_Mechanism)) then
2515 Mname := First (Expressions (Arg_Mechanism));
2517 while Present (Mname) loop
2520 ("too many mechanism associations", Mname);
2523 Set_Mechanism_Value (Formal, Mname);
2524 Next_Formal (Formal);
2529 -- Deal with named entries
2531 if Present (Component_Associations (Arg_Mechanism)) then
2532 Massoc := First (Component_Associations (Arg_Mechanism));
2534 while Present (Massoc) loop
2535 Choice := First (Choices (Massoc));
2537 if Nkind (Choice) /= N_Identifier
2538 or else Present (Next (Choice))
2541 ("incorrect form for mechanism association",
2545 Formal := First_Formal (Ent);
2549 ("parameter name & not present", Choice);
2552 if Chars (Choice) = Chars (Formal) then
2554 (Formal, Expression (Massoc));
2558 Next_Formal (Formal);
2568 -- Process First_Optional_Parameter argument if present. We have
2569 -- already checked that this is only allowed for the Import case.
2571 if Present (Arg_First_Optional_Parameter) then
2572 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
2574 ("first optional parameter must be formal parameter name",
2575 Arg_First_Optional_Parameter);
2578 Formal := First_Formal (Ent);
2582 ("specified formal parameter& not found",
2583 Arg_First_Optional_Parameter);
2586 exit when Chars (Formal) =
2587 Chars (Arg_First_Optional_Parameter);
2589 Next_Formal (Formal);
2592 Set_First_Optional_Parameter (Ent, Formal);
2594 -- Check specified and all remaining formals have right form
2596 while Present (Formal) loop
2597 if Ekind (Formal) /= E_In_Parameter then
2599 ("optional formal& is not of mode in!",
2600 Arg_First_Optional_Parameter, Formal);
2603 Dval := Default_Value (Formal);
2605 if not Present (Dval) then
2607 ("optional formal& does not have default value!",
2608 Arg_First_Optional_Parameter, Formal);
2610 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
2615 ("default value for optional formal& is non-static!",
2616 Arg_First_Optional_Parameter, Formal);
2620 Set_Is_Optional_Parameter (Formal);
2621 Next_Formal (Formal);
2624 end Process_Extended_Import_Export_Subprogram_Pragma;
2626 --------------------------
2627 -- Process_Generic_List --
2628 --------------------------
2630 procedure Process_Generic_List is
2636 Check_No_Identifiers;
2637 Check_At_Least_N_Arguments (1);
2640 while Present (Arg) loop
2641 Exp := Expression (Arg);
2644 if not Is_Entity_Name (Exp)
2646 (not Is_Generic_Instance (Entity (Exp))
2648 not Is_Generic_Unit (Entity (Exp)))
2651 ("pragma% argument must be name of generic unit/instance",
2657 end Process_Generic_List;
2659 ---------------------------------
2660 -- Process_Import_Or_Interface --
2661 ---------------------------------
2663 procedure Process_Import_Or_Interface is
2669 Process_Convention (C, Def_Id);
2670 Kill_Size_Check_Code (Def_Id);
2671 Note_Possible_Modification (Expression (Arg2));
2673 if Ekind (Def_Id) = E_Variable
2675 Ekind (Def_Id) = E_Constant
2677 -- User initialization is not allowed for imported object, but
2678 -- the object declaration may contain a default initialization,
2679 -- that will be discarded. Note that an explicit initialization
2680 -- only counts if it comes from source, otherwise it is simply
2681 -- the code generator making an implicit initialization explicit.
2683 if Present (Expression (Parent (Def_Id)))
2684 and then Comes_From_Source (Expression (Parent (Def_Id)))
2686 Error_Msg_Sloc := Sloc (Def_Id);
2688 ("no initialization allowed for declaration of& #",
2689 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2693 Set_Imported (Def_Id);
2694 Set_Is_Public (Def_Id);
2695 Process_Interface_Name (Def_Id, Arg3, Arg4);
2697 -- It is not possible to import a constant of an unconstrained
2698 -- array type (e.g. string) because there is no simple way to
2699 -- write a meaningful subtype for it.
2701 if Is_Array_Type (Etype (Def_Id))
2702 and then not Is_Constrained (Etype (Def_Id))
2705 ("imported constant& must have a constrained subtype",
2710 elsif Is_Subprogram (Def_Id)
2711 or else Is_Generic_Subprogram (Def_Id)
2713 -- If the name is overloaded, pragma applies to all of the
2714 -- denoted entities in the same declarative part.
2718 while Present (Hom_Id) loop
2719 Def_Id := Get_Base_Subprogram (Hom_Id);
2721 -- Ignore inherited subprograms because the pragma will
2722 -- apply to the parent operation, which is the one called.
2724 if Is_Overloadable (Def_Id)
2725 and then Present (Alias (Def_Id))
2729 -- If it is not a subprogram, it must be in an outer
2730 -- scope and pragma does not apply.
2732 elsif not Is_Subprogram (Def_Id)
2733 and then not Is_Generic_Subprogram (Def_Id)
2737 -- Verify that the homonym is in the same declarative
2738 -- part (not just the same scope).
2740 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
2741 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
2746 Set_Imported (Def_Id);
2748 -- If Import intrinsic, set intrinsic flag
2749 -- and verify that it is known as such.
2751 if C = Convention_Intrinsic then
2752 Set_Is_Intrinsic_Subprogram (Def_Id);
2753 Check_Intrinsic_Subprogram
2754 (Def_Id, Expression (Arg2));
2757 -- All interfaced procedures need an external
2758 -- symbol created for them since they are
2759 -- always referenced from another object file.
2761 Set_Is_Public (Def_Id);
2763 -- Verify that the subprogram does not have a completion
2764 -- through a renaming declaration. For other completions
2765 -- the pragma appears as a too late representation.
2768 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
2772 and then Nkind (Decl) = N_Subprogram_Declaration
2773 and then Present (Corresponding_Body (Decl))
2776 (Unit_Declaration_Node
2777 (Corresponding_Body (Decl))) =
2778 N_Subprogram_Renaming_Declaration
2780 Error_Msg_Sloc := Sloc (Def_Id);
2781 Error_Msg_NE ("cannot import&#," &
2782 " already completed by a renaming",
2787 Set_Has_Completion (Def_Id);
2788 Process_Interface_Name (Def_Id, Arg3, Arg4);
2791 if Is_Compilation_Unit (Hom_Id) then
2793 -- Its possible homonyms are not affected by the pragma.
2794 -- Such homonyms might be present in the context of other
2795 -- units being compiled.
2800 Hom_Id := Homonym (Hom_Id);
2804 -- When the convention is Java, we also allow Import to be given
2805 -- for packages, exceptions, and record components.
2807 elsif C = Convention_Java
2809 (Ekind (Def_Id) = E_Package
2810 or else Ekind (Def_Id) = E_Exception
2811 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
2813 Set_Imported (Def_Id);
2814 Set_Is_Public (Def_Id);
2815 Process_Interface_Name (Def_Id, Arg3, Arg4);
2819 ("second argument of pragma% must be object or subprogram",
2823 -- If this pragma applies to a compilation unit, then the unit,
2824 -- which is a subprogram, does not require (or allow) a body.
2825 -- We also do not need to elaborate imported procedures.
2827 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
2829 Cunit : constant Node_Id := Parent (Parent (N));
2831 Set_Body_Required (Cunit, False);
2834 end Process_Import_Or_Interface;
2836 --------------------
2837 -- Process_Inline --
2838 --------------------
2840 procedure Process_Inline (Active : Boolean) is
2846 Effective : Boolean := False;
2848 procedure Make_Inline (Subp : Entity_Id);
2849 -- Subp is the defining unit name of the subprogram
2850 -- declaration. Set the flag, as well as the flag in the
2851 -- corresponding body, if there is one present.
2853 procedure Set_Inline_Flags (Subp : Entity_Id);
2854 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp
2856 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean;
2857 -- Do not set the inline flag if body is available and contains
2858 -- exception handlers, to prevent undefined symbols at link time.
2860 ----------------------------
2861 -- Back_End_Cannot_Inline --
2862 ----------------------------
2864 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean is
2865 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
2868 if Nkind (Decl) = N_Subprogram_Body then
2871 (Exception_Handlers (Handled_Statement_Sequence (Decl)));
2873 elsif Nkind (Decl) = N_Subprogram_Declaration
2874 and then Present (Corresponding_Body (Decl))
2876 -- If the subprogram is a renaming as body, the body is
2877 -- just a call to the renamed subprogram, and inlining is
2878 -- trivially possible.
2880 if Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
2881 N_Subprogram_Renaming_Declaration
2887 Present (Exception_Handlers
2888 (Handled_Statement_Sequence
2889 (Unit_Declaration_Node (Corresponding_Body (Decl)))));
2892 -- If body is not available, assume the best, the check is
2893 -- performed again when compiling enclosing package bodies.
2897 end Back_End_Cannot_Inline;
2903 procedure Make_Inline (Subp : Entity_Id) is
2904 Kind : constant Entity_Kind := Ekind (Subp);
2905 Inner_Subp : Entity_Id := Subp;
2908 if Etype (Subp) = Any_Type then
2911 elsif Back_End_Cannot_Inline (Subp) then
2912 Applies := True; -- Do not treat as an error.
2915 -- Here we have a candidate for inlining, but we must exclude
2916 -- derived operations. Otherwise we will end up trying to
2917 -- inline a phantom declaration, and the result would be to
2918 -- drag in a body which has no direct inlining associated with
2919 -- it. That would not only be inefficient but would also result
2920 -- in the backend doing cross-unit inlining in cases where it
2921 -- was definitely inappropriate to do so.
2923 -- However, a simple Comes_From_Source test is insufficient,
2924 -- since we do want to allow inlining of generic instances,
2925 -- which also do not come from source. Predefined operators do
2926 -- not come from source but are not inlineable either.
2928 elsif not Comes_From_Source (Subp)
2929 and then not Is_Generic_Instance (Subp)
2930 and then Scope (Subp) /= Standard_Standard
2935 -- The referenced entity must either be the enclosing entity,
2936 -- or an entity declared within the current open scope.
2938 elsif Present (Scope (Subp))
2939 and then Scope (Subp) /= Current_Scope
2940 and then Subp /= Current_Scope
2943 ("argument of% must be entity in current scope", Assoc);
2947 -- Processing for procedure, operator or function.
2948 -- If subprogram is aliased (as for an instance) indicate
2949 -- that the renamed entity is inlined.
2951 if Is_Subprogram (Subp) then
2952 while Present (Alias (Inner_Subp)) loop
2953 Inner_Subp := Alias (Inner_Subp);
2956 Set_Inline_Flags (Inner_Subp);
2958 Decl := Parent (Parent (Inner_Subp));
2960 if Nkind (Decl) = N_Subprogram_Declaration
2961 and then Present (Corresponding_Body (Decl))
2963 Set_Inline_Flags (Corresponding_Body (Decl));
2968 -- For a generic subprogram set flag as well, for use at
2969 -- the point of instantiation, to determine whether the
2970 -- body should be generated.
2972 elsif Is_Generic_Subprogram (Subp) then
2973 Set_Inline_Flags (Subp);
2976 -- Literals are by definition inlined
2978 elsif Kind = E_Enumeration_Literal then
2981 -- Anything else is an error
2985 ("expect subprogram name for pragma%", Assoc);
2989 ----------------------
2990 -- Set_Inline_Flags --
2991 ----------------------
2993 procedure Set_Inline_Flags (Subp : Entity_Id) is
2996 Set_Is_Inlined (Subp, True);
2999 if not Has_Pragma_Inline (Subp) then
3000 Set_Has_Pragma_Inline (Subp);
3001 Set_Next_Rep_Item (N, First_Rep_Item (Subp));
3002 Set_First_Rep_Item (Subp, N);
3005 end Set_Inline_Flags;
3007 -- Start of processing for Process_Inline
3010 Check_No_Identifiers;
3011 Check_At_Least_N_Arguments (1);
3014 Inline_Processing_Required := True;
3018 while Present (Assoc) loop
3019 Subp_Id := Expression (Assoc);
3023 if Is_Entity_Name (Subp_Id) then
3024 Subp := Entity (Subp_Id);
3026 if Subp = Any_Id then
3032 while Present (Homonym (Subp))
3033 and then Scope (Homonym (Subp)) = Current_Scope
3035 Make_Inline (Homonym (Subp));
3036 Subp := Homonym (Subp);
3043 ("inappropriate argument for pragma%", Assoc);
3046 and then Warn_On_Redundant_Constructs
3048 Error_Msg_NE ("pragma inline on& is redundant?",
3049 N, Entity (Subp_Id));
3056 ----------------------------
3057 -- Process_Interface_Name --
3058 ----------------------------
3060 procedure Process_Interface_Name
3061 (Subprogram_Def : Entity_Id;
3067 String_Val : String_Id;
3069 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3070 -- SN is a string literal node for an interface name. This routine
3071 -- performs some minimal checks that the name is reasonable. In
3072 -- particular that no spaces or other obviously incorrect characters
3073 -- appear. This is only a warning, since any characters are allowed.
3075 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3076 S : constant String_Id := Strval (Expr_Value_S (SN));
3077 SL : constant Nat := String_Length (S);
3082 Error_Msg_N ("interface name cannot be null string", SN);
3085 for J in 1 .. SL loop
3086 C := Get_String_Char (S, J);
3088 if Warn_On_Export_Import
3089 and then (not In_Character_Range (C)
3090 or else Get_Character (C) = ' '
3091 or else Get_Character (C) = ',')
3094 ("?interface name contains illegal character", SN);
3097 end Check_Form_Of_Interface_Name;
3099 -- Start of processing for Process_Interface_Name
3102 if No (Link_Arg) then
3103 if No (Ext_Arg) then
3106 elsif Chars (Ext_Arg) = Name_Link_Name then
3108 Link_Nam := Expression (Ext_Arg);
3111 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3112 Ext_Nam := Expression (Ext_Arg);
3117 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3118 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3119 Ext_Nam := Expression (Ext_Arg);
3120 Link_Nam := Expression (Link_Arg);
3123 -- Check expressions for external name and link name are static
3125 if Present (Ext_Nam) then
3126 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3127 Check_Form_Of_Interface_Name (Ext_Nam);
3129 -- Verify that the external name is not the name of a local
3130 -- entity, which would hide the imported one and lead to
3131 -- run-time surprises. The problem can only arise for entities
3132 -- declared in a package body (otherwise the external name is
3133 -- fully qualified and won't conflict).
3141 if Prag_Id = Pragma_Import then
3142 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3144 E := Entity_Id (Get_Name_Table_Info (Nam));
3146 if Nam /= Chars (Subprogram_Def)
3147 and then Present (E)
3148 and then not Is_Overloadable (E)
3149 and then Is_Immediately_Visible (E)
3150 and then not Is_Imported (E)
3151 and then Ekind (Scope (E)) = E_Package
3155 while Present (Par) loop
3156 if Nkind (Par) = N_Package_Body then
3157 Error_Msg_Sloc := Sloc (E);
3159 ("imported entity is hidden by & declared#",
3164 Par := Parent (Par);
3171 if Present (Link_Nam) then
3172 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3173 Check_Form_Of_Interface_Name (Link_Nam);
3176 -- If there is no link name, just set the external name
3178 if No (Link_Nam) then
3179 Set_Encoded_Interface_Name
3180 (Get_Base_Subprogram (Subprogram_Def),
3181 Adjust_External_Name_Case (Expr_Value_S (Ext_Nam)));
3183 -- For the Link_Name case, the given literal is preceded by an
3184 -- asterisk, which indicates to GCC that the given name should
3185 -- be taken literally, and in particular that no prepending of
3186 -- underlines should occur, even in systems where this is the
3191 Store_String_Char (Get_Char_Code ('*'));
3192 String_Val := Strval (Expr_Value_S (Link_Nam));
3194 for J in 1 .. String_Length (String_Val) loop
3195 Store_String_Char (Get_String_Char (String_Val, J));
3199 Make_String_Literal (Sloc (Link_Nam), End_String);
3201 Set_Encoded_Interface_Name
3202 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3204 end Process_Interface_Name;
3206 -----------------------------------------
3207 -- Process_Interrupt_Or_Attach_Handler --
3208 -----------------------------------------
3210 procedure Process_Interrupt_Or_Attach_Handler is
3211 Arg1_X : constant Node_Id := Expression (Arg1);
3212 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3213 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3216 Set_Is_Interrupt_Handler (Handler_Proc);
3218 -- If the pragma is not associated with a handler procedure
3219 -- within a protected type, then it must be for a nonprotected
3220 -- procedure for the AAMP target, in which case we don't
3221 -- associate a representation item with the procedure's scope.
3223 if Ekind (Proc_Scope) = E_Protected_Type then
3224 if Prag_Id = Pragma_Interrupt_Handler
3226 Prag_Id = Pragma_Attach_Handler
3228 Record_Rep_Item (Proc_Scope, N);
3231 end Process_Interrupt_Or_Attach_Handler;
3233 --------------------------------------------------
3234 -- Process_Restrictions_Or_Restriction_Warnings --
3235 --------------------------------------------------
3237 procedure Process_Restrictions_Or_Restriction_Warnings is
3239 R_Id : Restriction_Id;
3244 procedure Set_Warning (R : All_Restrictions);
3245 -- If this is a Restriction_Warnings pragma, set warning flag
3247 procedure Set_Warning (R : All_Restrictions) is
3249 if Prag_Id = Pragma_Restriction_Warnings then
3250 Restriction_Warnings (R) := True;
3254 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
3257 Check_Ada_83_Warning;
3258 Check_At_Least_N_Arguments (1);
3259 Check_Valid_Configuration_Pragma;
3262 while Present (Arg) loop
3264 Expr := Expression (Arg);
3266 -- Case of no restriction identifier
3268 if Id = No_Name then
3269 if Nkind (Expr) /= N_Identifier then
3271 ("invalid form for restriction", Arg);
3274 -- No_Requeue is a synonym for No_Requeue_Statements
3276 if Chars (Expr) = Name_No_Requeue then
3278 (No_Implementation_Restrictions, Arg);
3279 Set_Restriction (No_Requeue_Statements, N);
3280 Set_Warning (No_Requeue_Statements);
3282 -- No_Task_Attributes is a synonym for
3283 -- No_Task_Attributes_Package
3285 elsif Chars (Expr) = Name_No_Task_Attributes then
3287 (No_Implementation_Restrictions, Arg);
3288 Set_Restriction (No_Task_Attributes_Package, N);
3289 Set_Warning (No_Task_Attributes_Package);
3291 -- Normal processing for all other cases
3294 R_Id := Get_Restriction_Id (Chars (Expr));
3296 if R_Id not in All_Boolean_Restrictions then
3298 ("invalid restriction identifier", Arg);
3300 -- Restriction is active
3303 if Implementation_Restriction (R_Id) then
3305 (No_Implementation_Restrictions, Arg);
3308 Set_Restriction (R_Id, N);
3311 -- A very special case that must be processed here:
3312 -- pragma Restrictions (No_Exceptions) turns off
3313 -- all run-time checking. This is a bit dubious in
3314 -- terms of the formal language definition, but it
3315 -- is what is intended by RM H.4(12).
3317 if R_Id = No_Exceptions then
3318 Scope_Suppress := (others => True);
3324 -- Case of restriction identifier present
3327 R_Id := Get_Restriction_Id (Id);
3328 Analyze_And_Resolve (Expr, Any_Integer);
3330 if R_Id not in All_Parameter_Restrictions then
3332 ("invalid restriction parameter identifier", Arg);
3334 elsif not Is_OK_Static_Expression (Expr) then
3335 Flag_Non_Static_Expr
3336 ("value must be static expression!", Expr);
3339 elsif not Is_Integer_Type (Etype (Expr))
3340 or else Expr_Value (Expr) < 0
3343 ("value must be non-negative integer", Arg);
3345 -- Restriction pragma is active
3348 Val := Expr_Value (Expr);
3350 if not UI_Is_In_Int_Range (Val) then
3352 ("pragma ignored, value too large?", Arg);
3354 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
3362 end Process_Restrictions_Or_Restriction_Warnings;
3364 ---------------------------------
3365 -- Process_Suppress_Unsuppress --
3366 ---------------------------------
3368 -- Note: this procedure makes entries in the check suppress data
3369 -- structures managed by Sem. See spec of package Sem for full
3370 -- details on how we handle recording of check suppression.
3372 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
3377 In_Package_Spec : constant Boolean :=
3378 (Ekind (Current_Scope) = E_Package
3380 Ekind (Current_Scope) = E_Generic_Package)
3381 and then not In_Package_Body (Current_Scope);
3383 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
3384 -- Used to suppress a single check on the given entity
3386 --------------------------------
3387 -- Suppress_Unsuppress_Echeck --
3388 --------------------------------
3390 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
3391 ESR : constant Entity_Check_Suppress_Record :=
3394 Suppress => Suppress_Case);
3397 Set_Checks_May_Be_Suppressed (E);
3399 if In_Package_Spec then
3400 Global_Entity_Suppress.Append (ESR);
3402 Local_Entity_Suppress.Append (ESR);
3405 -- If this is a first subtype, and the base type is distinct,
3406 -- then also set the suppress flags on the base type.
3408 if Is_First_Subtype (E)
3409 and then Etype (E) /= E
3411 Suppress_Unsuppress_Echeck (Etype (E), C);
3413 end Suppress_Unsuppress_Echeck;
3415 -- Start of processing for Process_Suppress_Unsuppress
3418 -- Suppress/Unsuppress can appear as a configuration pragma,
3419 -- or in a declarative part or a package spec (RM 11.5(5))
3421 if not Is_Configuration_Pragma then
3422 Check_Is_In_Decl_Part_Or_Package_Spec;
3425 Check_At_Least_N_Arguments (1);
3426 Check_At_Most_N_Arguments (2);
3427 Check_No_Identifier (Arg1);
3428 Check_Arg_Is_Identifier (Arg1);
3430 if not Is_Check_Name (Chars (Expression (Arg1))) then
3432 ("argument of pragma% is not valid check name", Arg1);
3434 C := Get_Check_Id (Chars (Expression (Arg1)));
3437 if Arg_Count = 1 then
3439 -- Make an entry in the local scope suppress table. This is the
3440 -- table that directly shows the current value of the scope
3441 -- suppress check for any check id value.
3443 if C = All_Checks then
3444 Scope_Suppress := (others => Suppress_Case);
3446 Scope_Suppress (C) := Suppress_Case;
3449 -- Also make an entry in the Local_Entity_Suppress table. See
3450 -- extended description in the package spec of Sem for details.
3452 Local_Entity_Suppress.Append
3455 Suppress => Suppress_Case));
3457 -- Case of two arguments present, where the check is
3458 -- suppressed for a specified entity (given as the second
3459 -- argument of the pragma)
3462 Check_Optional_Identifier (Arg2, Name_On);
3463 E_Id := Expression (Arg2);
3466 if not Is_Entity_Name (E_Id) then
3468 ("second argument of pragma% must be entity name", Arg2);
3477 -- Enforce RM 11.5(7) which requires that for a pragma that
3478 -- appears within a package spec, the named entity must be
3479 -- within the package spec. We allow the package name itself
3480 -- to be mentioned since that makes sense, although it is not
3481 -- strictly allowed by 11.5(7).
3484 and then E /= Current_Scope
3485 and then Scope (E) /= Current_Scope
3488 ("entity in pragma% is not in package spec ('R'M 11.5(7))",
3492 -- Loop through homonyms. As noted below, in the case of a package
3493 -- spec, only homonyms within the package spec are considered.
3496 Suppress_Unsuppress_Echeck (E, C);
3498 if Is_Generic_Instance (E)
3499 and then Is_Subprogram (E)
3500 and then Present (Alias (E))
3502 Suppress_Unsuppress_Echeck (Alias (E), C);
3505 -- Move to next homonym
3510 -- If we are within a package specification, the
3511 -- pragma only applies to homonyms in the same scope.
3513 exit when In_Package_Spec
3514 and then Scope (E) /= Current_Scope;
3517 end Process_Suppress_Unsuppress;
3523 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
3525 if Is_Imported (E) then
3527 ("cannot export entity& that was previously imported", Arg);
3529 elsif Present (Address_Clause (E)) then
3531 ("cannot export entity& that has an address clause", Arg);
3534 Set_Is_Exported (E);
3536 -- Generate a reference for entity explicitly, because the
3537 -- identifier may be overloaded and name resolution will not
3540 Generate_Reference (E, Arg);
3542 -- Deal with exporting non-library level entity
3544 if not Is_Library_Level_Entity (E) then
3546 -- Not allowed at all for subprograms
3548 if Is_Subprogram (E) then
3549 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
3551 -- Otherwise set public and statically allocated
3555 Set_Is_Statically_Allocated (E);
3557 if Warn_On_Export_Import then
3559 ("?& has been made static as a result of Export", Arg, E);
3561 ("\this usage is non-standard and non-portable", Arg);
3566 if Warn_On_Export_Import and then Is_Type (E) then
3568 ("exporting a type has no effect?", Arg, E);
3571 if Warn_On_Export_Import and Inside_A_Generic then
3573 ("all instances of& will have the same external name?", Arg, E);
3577 ----------------------------------------------
3578 -- Set_Extended_Import_Export_External_Name --
3579 ----------------------------------------------
3581 procedure Set_Extended_Import_Export_External_Name
3582 (Internal_Ent : Entity_Id;
3583 Arg_External : Node_Id)
3585 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
3589 if No (Arg_External) then
3592 elsif Nkind (Arg_External) = N_String_Literal then
3593 if String_Length (Strval (Arg_External)) = 0 then
3596 New_Name := Adjust_External_Name_Case (Arg_External);
3599 elsif Nkind (Arg_External) = N_Identifier then
3600 New_Name := Get_Default_External_Name (Arg_External);
3604 ("incorrect form for External parameter for pragma%",
3608 -- If we already have an external name set (by a prior normal
3609 -- Import or Export pragma), then the external names must match
3611 if Present (Interface_Name (Internal_Ent)) then
3613 S1 : constant String_Id := Strval (Old_Name);
3614 S2 : constant String_Id := Strval (New_Name);
3617 -- Called if names do not match
3619 procedure Mismatch is
3621 Error_Msg_Sloc := Sloc (Old_Name);
3623 ("external name does not match that given #",
3628 if String_Length (S1) /= String_Length (S2) then
3632 for J in 1 .. String_Length (S1) loop
3633 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
3640 -- Otherwise set the given name
3643 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
3646 end Set_Extended_Import_Export_External_Name;
3652 procedure Set_Imported (E : Entity_Id) is
3654 Error_Msg_Sloc := Sloc (E);
3656 if Is_Exported (E) or else Is_Imported (E) then
3657 Error_Msg_NE ("import of& declared# not allowed", N, E);
3659 if Is_Exported (E) then
3660 Error_Msg_N ("\entity was previously exported", N);
3662 Error_Msg_N ("\entity was previously imported", N);
3665 Error_Pragma ("\(pragma% applies to all previous entities)");
3668 Set_Is_Imported (E);
3670 -- If the entity is an object that is not at the library
3671 -- level, then it is statically allocated. We do not worry
3672 -- about objects with address clauses in this context since
3673 -- they are not really imported in the linker sense.
3676 and then not Is_Library_Level_Entity (E)
3677 and then No (Address_Clause (E))
3679 Set_Is_Statically_Allocated (E);
3684 -------------------------
3685 -- Set_Mechanism_Value --
3686 -------------------------
3688 -- Note: the mechanism name has not been analyzed (and cannot indeed
3689 -- be analyzed, since it is semantic nonsense), so we get it in the
3690 -- exact form created by the parser.
3692 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
3696 procedure Bad_Class;
3697 -- Signal bad descriptor class name
3699 procedure Bad_Mechanism;
3700 -- Signal bad mechanism name
3702 procedure Bad_Class is
3704 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
3707 procedure Bad_Mechanism is
3709 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
3712 -- Start of processing for Set_Mechanism_Value
3715 if Mechanism (Ent) /= Default_Mechanism then
3717 ("mechanism for & has already been set", Mech_Name, Ent);
3720 -- MECHANISM_NAME ::= value | reference | descriptor
3722 if Nkind (Mech_Name) = N_Identifier then
3723 if Chars (Mech_Name) = Name_Value then
3724 Set_Mechanism (Ent, By_Copy);
3727 elsif Chars (Mech_Name) = Name_Reference then
3728 Set_Mechanism (Ent, By_Reference);
3731 elsif Chars (Mech_Name) = Name_Descriptor then
3732 Check_VMS (Mech_Name);
3733 Set_Mechanism (Ent, By_Descriptor);
3736 elsif Chars (Mech_Name) = Name_Copy then
3738 ("bad mechanism name, Value assumed", Mech_Name);
3744 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
3745 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3747 -- Note: this form is parsed as an indexed component
3749 elsif Nkind (Mech_Name) = N_Indexed_Component then
3750 Class := First (Expressions (Mech_Name));
3752 if Nkind (Prefix (Mech_Name)) /= N_Identifier
3753 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
3754 or else Present (Next (Class))
3759 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
3760 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3762 -- Note: this form is parsed as a function call
3764 elsif Nkind (Mech_Name) = N_Function_Call then
3766 Param := First (Parameter_Associations (Mech_Name));
3768 if Nkind (Name (Mech_Name)) /= N_Identifier
3769 or else Chars (Name (Mech_Name)) /= Name_Descriptor
3770 or else Present (Next (Param))
3771 or else No (Selector_Name (Param))
3772 or else Chars (Selector_Name (Param)) /= Name_Class
3776 Class := Explicit_Actual_Parameter (Param);
3783 -- Fall through here with Class set to descriptor class name
3785 Check_VMS (Mech_Name);
3787 if Nkind (Class) /= N_Identifier then
3790 elsif Chars (Class) = Name_UBS then
3791 Set_Mechanism (Ent, By_Descriptor_UBS);
3793 elsif Chars (Class) = Name_UBSB then
3794 Set_Mechanism (Ent, By_Descriptor_UBSB);
3796 elsif Chars (Class) = Name_UBA then
3797 Set_Mechanism (Ent, By_Descriptor_UBA);
3799 elsif Chars (Class) = Name_S then
3800 Set_Mechanism (Ent, By_Descriptor_S);
3802 elsif Chars (Class) = Name_SB then
3803 Set_Mechanism (Ent, By_Descriptor_SB);
3805 elsif Chars (Class) = Name_A then
3806 Set_Mechanism (Ent, By_Descriptor_A);
3808 elsif Chars (Class) = Name_NCA then
3809 Set_Mechanism (Ent, By_Descriptor_NCA);
3815 end Set_Mechanism_Value;
3817 -- Start of processing for Analyze_Pragma
3820 if not Is_Pragma_Name (Chars (N)) then
3821 if Warn_On_Unrecognized_Pragma then
3822 Error_Pragma ("unrecognized pragma%!?");
3827 Prag_Id := Get_Pragma_Id (Chars (N));
3837 if Present (Pragma_Argument_Associations (N)) then
3838 Arg1 := First (Pragma_Argument_Associations (N));
3840 if Present (Arg1) then
3841 Arg2 := Next (Arg1);
3843 if Present (Arg2) then
3844 Arg3 := Next (Arg2);
3846 if Present (Arg3) then
3847 Arg4 := Next (Arg3);
3853 -- Count number of arguments
3860 while Present (Arg_Node) loop
3861 Arg_Count := Arg_Count + 1;
3866 -- An enumeration type defines the pragmas that are supported by the
3867 -- implementation. Get_Pragma_Id (in package Prag) transorms a name
3868 -- into the corresponding enumeration value for the following case.
3876 -- pragma Abort_Defer;
3878 when Pragma_Abort_Defer =>
3880 Check_Arg_Count (0);
3882 -- The only required semantic processing is to check the
3883 -- placement. This pragma must appear at the start of the
3884 -- statement sequence of a handled sequence of statements.
3886 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
3887 or else N /= First (Statements (Parent (N)))
3898 -- Note: this pragma also has some specific processing in Par.Prag
3899 -- because we want to set the Ada 83 mode switch during parsing.
3901 when Pragma_Ada_83 =>
3905 Check_Arg_Count (0);
3913 -- Note: this pragma also has some specific processing in Par.Prag
3914 -- because we want to set the Ada 83 mode switch during parsing.
3916 when Pragma_Ada_95 =>
3920 Check_Arg_Count (0);
3922 ----------------------
3923 -- All_Calls_Remote --
3924 ----------------------
3926 -- pragma All_Calls_Remote [(library_package_NAME)];
3928 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
3929 Lib_Entity : Entity_Id;
3932 Check_Ada_83_Warning;
3933 Check_Valid_Library_Unit_Pragma;
3935 if Nkind (N) = N_Null_Statement then
3939 Lib_Entity := Find_Lib_Unit_Name;
3941 -- This pragma should only apply to a RCI unit (RM E.2.3(23)).
3943 if Present (Lib_Entity)
3944 and then not Debug_Flag_U
3946 if not Is_Remote_Call_Interface (Lib_Entity) then
3947 Error_Pragma ("pragma% only apply to rci unit");
3949 -- Set flag for entity of the library unit
3952 Set_Has_All_Calls_Remote (Lib_Entity);
3956 end All_Calls_Remote;
3962 -- pragma Annotate (IDENTIFIER {, ARG});
3963 -- ARG ::= NAME | EXPRESSION
3965 when Pragma_Annotate => Annotate : begin
3967 Check_At_Least_N_Arguments (1);
3968 Check_Arg_Is_Identifier (Arg1);
3971 Arg : Node_Id := Arg2;
3975 while Present (Arg) loop
3976 Exp := Expression (Arg);
3979 if Is_Entity_Name (Exp) then
3982 elsif Nkind (Exp) = N_String_Literal then
3983 Resolve (Exp, Standard_String);
3985 elsif Is_Overloaded (Exp) then
3986 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
4001 -- pragma Assert (Boolean_EXPRESSION [, static_string_EXPRESSION]);
4003 when Pragma_Assert =>
4005 Check_No_Identifiers;
4007 if Arg_Count > 1 then
4008 Check_Arg_Count (2);
4009 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4012 -- If expansion is active and assertions are inactive, then
4013 -- we rewrite the Assertion as:
4015 -- if False and then condition then
4019 -- The reason we do this rewriting during semantic analysis
4020 -- rather than as part of normal expansion is that we cannot
4021 -- analyze and expand the code for the boolean expression
4022 -- directly, or it may cause insertion of actions that would
4023 -- escape the attempt to suppress the assertion code.
4025 if Expander_Active and not Assertions_Enabled then
4027 Make_If_Statement (Loc,
4030 Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
4031 Right_Opnd => Get_Pragma_Arg (Arg1)),
4032 Then_Statements => New_List (
4033 Make_Null_Statement (Loc))));
4037 -- Otherwise (if assertions are enabled, or if we are not
4038 -- operating with expansion active), then we just analyze
4039 -- and resolve the expression.
4042 Analyze_And_Resolve (Expression (Arg1), Any_Boolean);
4049 -- pragma AST_Entry (entry_IDENTIFIER);
4051 when Pragma_AST_Entry => AST_Entry : declare
4057 Check_Arg_Count (1);
4058 Check_No_Identifiers;
4059 Check_Arg_Is_Local_Name (Arg1);
4060 Ent := Entity (Expression (Arg1));
4062 -- Note: the implementation of the AST_Entry pragma could handle
4063 -- the entry family case fine, but for now we are consistent with
4064 -- the DEC rules, and do not allow the pragma, which of course
4065 -- has the effect of also forbidding the attribute.
4067 if Ekind (Ent) /= E_Entry then
4069 ("pragma% argument must be simple entry name", Arg1);
4071 elsif Is_AST_Entry (Ent) then
4073 ("duplicate % pragma for entry", Arg1);
4075 elsif Has_Homonym (Ent) then
4077 ("pragma% argument cannot specify overloaded entry", Arg1);
4081 FF : constant Entity_Id := First_Formal (Ent);
4084 if Present (FF) then
4085 if Present (Next_Formal (FF)) then
4087 ("entry for pragma% can have only one argument",
4090 elsif Parameter_Mode (FF) /= E_In_Parameter then
4092 ("entry parameter for pragma% must have mode IN",
4098 Set_Is_AST_Entry (Ent);
4106 -- pragma Asynchronous (LOCAL_NAME);
4108 when Pragma_Asynchronous => Asynchronous : declare
4116 procedure Process_Async_Pragma;
4117 -- Common processing for procedure and access-to-procedure case
4119 --------------------------
4120 -- Process_Async_Pragma --
4121 --------------------------
4123 procedure Process_Async_Pragma is
4125 if not Present (L) then
4126 Set_Is_Asynchronous (Nm);
4130 -- The formals should be of mode IN (RM E.4.1(6))
4133 while Present (S) loop
4134 Formal := Defining_Identifier (S);
4136 if Nkind (Formal) = N_Defining_Identifier
4137 and then Ekind (Formal) /= E_In_Parameter
4140 ("pragma% procedure can only have IN parameter",
4147 Set_Is_Asynchronous (Nm);
4148 end Process_Async_Pragma;
4150 -- Start of processing for pragma Asynchronous
4153 Check_Ada_83_Warning;
4154 Check_No_Identifiers;
4155 Check_Arg_Count (1);
4156 Check_Arg_Is_Local_Name (Arg1);
4158 if Debug_Flag_U then
4162 C_Ent := Cunit_Entity (Current_Sem_Unit);
4163 Analyze (Expression (Arg1));
4164 Nm := Entity (Expression (Arg1));
4166 if not Is_Remote_Call_Interface (C_Ent)
4167 and then not Is_Remote_Types (C_Ent)
4169 -- This pragma should only appear in an RCI or Remote Types
4170 -- unit (RM E.4.1(4))
4173 ("pragma% not in Remote_Call_Interface or " &
4174 "Remote_Types unit");
4177 if Ekind (Nm) = E_Procedure
4178 and then Nkind (Parent (Nm)) = N_Procedure_Specification
4180 if not Is_Remote_Call_Interface (Nm) then
4182 ("pragma% cannot be applied on non-remote procedure",
4186 L := Parameter_Specifications (Parent (Nm));
4187 Process_Async_Pragma;
4190 elsif Ekind (Nm) = E_Function then
4192 ("pragma% cannot be applied to function", Arg1);
4194 elsif Ekind (Nm) = E_Record_Type
4195 and then Present (Corresponding_Remote_Type (Nm))
4197 N := Declaration_Node (Corresponding_Remote_Type (Nm));
4199 if Nkind (N) = N_Full_Type_Declaration
4200 and then Nkind (Type_Definition (N)) =
4201 N_Access_Procedure_Definition
4203 L := Parameter_Specifications (Type_Definition (N));
4204 Process_Async_Pragma;
4208 ("pragma% cannot reference access-to-function type",
4212 -- Only other possibility is Access-to-class-wide type
4214 elsif Is_Access_Type (Nm)
4215 and then Is_Class_Wide_Type (Designated_Type (Nm))
4217 Check_First_Subtype (Arg1);
4218 Set_Is_Asynchronous (Nm);
4219 if Expander_Active then
4220 RACW_Type_Is_Asynchronous (Nm);
4224 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
4232 -- pragma Atomic (LOCAL_NAME);
4234 when Pragma_Atomic =>
4235 Process_Atomic_Shared_Volatile;
4237 -----------------------
4238 -- Atomic_Components --
4239 -----------------------
4241 -- pragma Atomic_Components (array_LOCAL_NAME);
4243 -- This processing is shared by Volatile_Components
4245 when Pragma_Atomic_Components |
4246 Pragma_Volatile_Components =>
4248 Atomic_Components : declare
4255 Check_Ada_83_Warning;
4256 Check_No_Identifiers;
4257 Check_Arg_Count (1);
4258 Check_Arg_Is_Local_Name (Arg1);
4259 E_Id := Expression (Arg1);
4261 if Etype (E_Id) = Any_Type then
4267 if Rep_Item_Too_Early (E, N)
4269 Rep_Item_Too_Late (E, N)
4274 D := Declaration_Node (E);
4277 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
4279 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
4280 and then Nkind (D) = N_Object_Declaration
4281 and then Nkind (Object_Definition (D)) =
4282 N_Constrained_Array_Definition)
4284 -- The flag is set on the object, or on the base type
4286 if Nkind (D) /= N_Object_Declaration then
4290 Set_Has_Volatile_Components (E);
4292 if Prag_Id = Pragma_Atomic_Components then
4293 Set_Has_Atomic_Components (E);
4295 if Is_Packed (E) then
4296 Set_Is_Packed (E, False);
4299 ("?Pack canceled, cannot pack atomic components",
4305 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
4307 end Atomic_Components;
4309 --------------------
4310 -- Attach_Handler --
4311 --------------------
4313 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
4315 when Pragma_Attach_Handler =>
4316 Check_Ada_83_Warning;
4317 Check_No_Identifiers;
4318 Check_Arg_Count (2);
4320 if No_Run_Time_Mode then
4321 Error_Msg_CRT ("Attach_Handler pragma", N);
4323 Check_Interrupt_Or_Attach_Handler;
4325 -- The expression that designates the attribute may
4326 -- depend on a discriminant, and is therefore a per-
4327 -- object expression, to be expanded in the init proc.
4328 -- If expansion is enabled, perform semantic checks
4331 if Expander_Active then
4333 Temp : constant Node_Id :=
4334 New_Copy_Tree (Expression (Arg2));
4336 Set_Parent (Temp, N);
4337 Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
4341 Analyze (Expression (Arg2));
4342 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
4345 Process_Interrupt_Or_Attach_Handler;
4348 --------------------
4349 -- C_Pass_By_Copy --
4350 --------------------
4352 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
4354 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
4360 Check_Valid_Configuration_Pragma;
4361 Check_Arg_Count (1);
4362 Check_Optional_Identifier (Arg1, "max_size");
4364 Arg := Expression (Arg1);
4365 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
4367 Val := Expr_Value (Arg);
4371 ("maximum size for pragma% must be positive", Arg1);
4373 elsif UI_Is_In_Int_Range (Val) then
4374 Default_C_Record_Mechanism := UI_To_Int (Val);
4376 -- If a giant value is given, Int'Last will do well enough.
4377 -- If sometime someone complains that a record larger than
4378 -- two gigabytes is not copied, we will worry about it then!
4381 Default_C_Record_Mechanism := Mechanism_Type'Last;
4389 -- pragma Comment (static_string_EXPRESSION)
4391 -- Processing for pragma Comment shares the circuitry for
4392 -- pragma Ident. The only differences are that Ident enforces
4393 -- a limit of 31 characters on its argument, and also enforces
4394 -- limitations on placement for DEC compatibility. Pragma
4395 -- Comment shares neither of these restrictions.
4401 -- pragma Common_Object (
4402 -- [Internal =>] LOCAL_NAME,
4403 -- [, [External =>] EXTERNAL_SYMBOL]
4404 -- [, [Size =>] EXTERNAL_SYMBOL]);
4406 -- Processing for this pragma is shared with Psect_Object
4408 --------------------------
4409 -- Compile_Time_Warning --
4410 --------------------------
4412 -- pragma Compile_Time_Warning
4413 -- (boolean_EXPRESSION, static_string_EXPRESSION);
4415 when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
4416 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
4420 Check_Arg_Count (2);
4421 Check_No_Identifiers;
4422 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4423 Analyze_And_Resolve (Arg1x, Standard_Boolean);
4425 if Compile_Time_Known_Value (Arg1x) then
4426 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
4427 String_To_Name_Buffer (Strval (Get_Pragma_Arg (Arg2)));
4428 Add_Char_To_Name_Buffer ('?');
4431 Msg : String (1 .. Name_Len) :=
4432 Name_Buffer (1 .. Name_Len);
4437 -- This loop looks for multiple lines separated by
4438 -- ASCII.LF and breaks them into continuation error
4439 -- messages marked with the usual back slash.
4442 for S in 2 .. Msg'Length - 1 loop
4443 if Msg (S) = ASCII.LF then
4445 Error_Msg_N (Msg (B .. S), Arg1);
4451 Error_Msg_N (Msg (B .. Msg'Length), Arg1);
4455 end Compile_Time_Warning;
4457 ----------------------------
4458 -- Complex_Representation --
4459 ----------------------------
4461 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
4463 when Pragma_Complex_Representation => Complex_Representation : declare
4470 Check_Arg_Count (1);
4471 Check_Optional_Identifier (Arg1, Name_Entity);
4472 Check_Arg_Is_Local_Name (Arg1);
4473 E_Id := Expression (Arg1);
4475 if Etype (E_Id) = Any_Type then
4481 if not Is_Record_Type (E) then
4483 ("argument for pragma% must be record type", Arg1);
4486 Ent := First_Entity (E);
4489 or else No (Next_Entity (Ent))
4490 or else Present (Next_Entity (Next_Entity (Ent)))
4491 or else not Is_Floating_Point_Type (Etype (Ent))
4492 or else Etype (Ent) /= Etype (Next_Entity (Ent))
4495 ("record for pragma% must have two fields of same fpt type",
4499 Set_Has_Complex_Representation (Base_Type (E));
4501 end Complex_Representation;
4503 -------------------------
4504 -- Component_Alignment --
4505 -------------------------
4507 -- pragma Component_Alignment (
4508 -- [Form =>] ALIGNMENT_CHOICE
4509 -- [, [Name =>] type_LOCAL_NAME]);
4511 -- ALIGNMENT_CHOICE ::=
4513 -- | Component_Size_4
4517 when Pragma_Component_Alignment => Component_AlignmentP : declare
4518 Args : Args_List (1 .. 2);
4519 Names : constant Name_List (1 .. 2) := (
4523 Form : Node_Id renames Args (1);
4524 Name : Node_Id renames Args (2);
4526 Atype : Component_Alignment_Kind;
4531 Gather_Associations (Names, Args);
4534 Error_Pragma ("missing Form argument for pragma%");
4537 Check_Arg_Is_Identifier (Form);
4539 -- Get proper alignment, note that Default = Component_Size
4540 -- on all machines we have so far, and we want to set this
4541 -- value rather than the default value to indicate that it
4542 -- has been explicitly set (and thus will not get overridden
4543 -- by the default component alignment for the current scope)
4545 if Chars (Form) = Name_Component_Size then
4546 Atype := Calign_Component_Size;
4548 elsif Chars (Form) = Name_Component_Size_4 then
4549 Atype := Calign_Component_Size_4;
4551 elsif Chars (Form) = Name_Default then
4552 Atype := Calign_Component_Size;
4554 elsif Chars (Form) = Name_Storage_Unit then
4555 Atype := Calign_Storage_Unit;
4559 ("invalid Form parameter for pragma%", Form);
4562 -- Case with no name, supplied, affects scope table entry
4566 (Scope_Stack.Last).Component_Alignment_Default := Atype;
4568 -- Case of name supplied
4571 Check_Arg_Is_Local_Name (Name);
4573 Typ := Entity (Name);
4576 or else Rep_Item_Too_Early (Typ, N)
4580 Typ := Underlying_Type (Typ);
4583 if not Is_Record_Type (Typ)
4584 and then not Is_Array_Type (Typ)
4587 ("Name parameter of pragma% must identify record or " &
4588 "array type", Name);
4591 -- An explicit Component_Alignment pragma overrides an
4592 -- implicit pragma Pack, but not an explicit one.
4594 if not Has_Pragma_Pack (Base_Type (Typ)) then
4595 Set_Is_Packed (Base_Type (Typ), False);
4596 Set_Component_Alignment (Base_Type (Typ), Atype);
4599 end Component_AlignmentP;
4605 -- pragma Controlled (first_subtype_LOCAL_NAME);
4607 when Pragma_Controlled => Controlled : declare
4611 Check_No_Identifiers;
4612 Check_Arg_Count (1);
4613 Check_Arg_Is_Local_Name (Arg1);
4614 Arg := Expression (Arg1);
4616 if not Is_Entity_Name (Arg)
4617 or else not Is_Access_Type (Entity (Arg))
4619 Error_Pragma_Arg ("pragma% requires access type", Arg1);
4621 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
4629 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
4630 -- [Entity =>] LOCAL_NAME);
4632 when Pragma_Convention => Convention : declare
4636 Check_Ada_83_Warning;
4637 Check_Arg_Count (2);
4638 Process_Convention (C, E);
4641 ---------------------------
4642 -- Convention_Identifier --
4643 ---------------------------
4645 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
4646 -- [Convention =>] convention_IDENTIFIER);
4648 when Pragma_Convention_Identifier => Convention_Identifier : declare
4654 Check_Arg_Count (2);
4655 Check_Optional_Identifier (Arg1, Name_Name);
4656 Check_Optional_Identifier (Arg2, Name_Convention);
4657 Check_Arg_Is_Identifier (Arg1);
4658 Check_Arg_Is_Identifier (Arg1);
4659 Idnam := Chars (Expression (Arg1));
4660 Cname := Chars (Expression (Arg2));
4662 if Is_Convention_Name (Cname) then
4663 Record_Convention_Identifier
4664 (Idnam, Get_Convention_Id (Cname));
4667 ("second arg for % pragma must be convention", Arg2);
4669 end Convention_Identifier;
4675 -- pragma CPP_Class ([Entity =>] local_NAME)
4677 when Pragma_CPP_Class => CPP_Class : declare
4680 Default_DTC : Entity_Id := Empty;
4681 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4687 Check_Arg_Count (1);
4688 Check_Optional_Identifier (Arg1, Name_Entity);
4689 Check_Arg_Is_Local_Name (Arg1);
4691 Arg := Expression (Arg1);
4694 if Etype (Arg) = Any_Type then
4698 if not Is_Entity_Name (Arg)
4699 or else not Is_Type (Entity (Arg))
4701 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
4704 Typ := Entity (Arg);
4706 if not Is_Record_Type (Typ) then
4707 Error_Pragma_Arg ("pragma% applicable to a record, "
4708 & "tagged record or record extension", Arg1);
4711 Default_DTC := First_Component (Typ);
4712 while Present (Default_DTC)
4713 and then Etype (Default_DTC) /= VTP_Type
4715 Next_Component (Default_DTC);
4718 -- Case of non tagged type
4720 if not Is_Tagged_Type (Typ) then
4721 Set_Is_CPP_Class (Typ);
4723 if Present (Default_DTC) then
4725 ("only tagged records can contain vtable pointers", Arg1);
4728 -- Case of tagged type with no vtable ptr
4730 -- What is test for Typ = Root_Typ (Typ) about here ???
4732 elsif Is_Tagged_Type (Typ)
4733 and then Typ = Root_Type (Typ)
4734 and then No (Default_DTC)
4737 ("a cpp_class must contain a vtable pointer", Arg1);
4739 -- Tagged type that has a vtable ptr
4741 elsif Present (Default_DTC) then
4742 Set_Is_CPP_Class (Typ);
4743 Set_Is_Limited_Record (Typ);
4744 Set_Is_Tag (Default_DTC);
4745 Set_DT_Entry_Count (Default_DTC, No_Uint);
4747 -- Since a CPP type has no direct link to its associated tag
4748 -- most tags checks cannot be performed
4750 Set_Kill_Tag_Checks (Typ);
4751 Set_Kill_Tag_Checks (Class_Wide_Type (Typ));
4753 -- Get rid of the _tag component when there was one.
4754 -- It is only useful for regular tagged types
4756 if Expander_Active and then Typ = Root_Type (Typ) then
4758 Tag_C := Tag_Component (Typ);
4759 C := First_Entity (Typ);
4762 Set_First_Entity (Typ, Next_Entity (Tag_C));
4765 while Next_Entity (C) /= Tag_C loop
4769 Set_Next_Entity (C, Next_Entity (Tag_C));
4775 ---------------------
4776 -- CPP_Constructor --
4777 ---------------------
4779 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME);
4781 when Pragma_CPP_Constructor => CPP_Constructor : declare
4787 Check_Arg_Count (1);
4788 Check_Optional_Identifier (Arg1, Name_Entity);
4789 Check_Arg_Is_Local_Name (Arg1);
4791 Id := Expression (Arg1);
4792 Find_Program_Unit_Name (Id);
4794 -- If we did not find the name, we are done
4796 if Etype (Id) = Any_Type then
4800 Def_Id := Entity (Id);
4802 if Ekind (Def_Id) = E_Function
4803 and then Is_Class_Wide_Type (Etype (Def_Id))
4804 and then Is_CPP_Class (Etype (Etype (Def_Id)))
4806 -- What the heck is this??? this pragma allows only 1 arg
4808 if Arg_Count >= 2 then
4809 Check_At_Most_N_Arguments (3);
4810 Process_Interface_Name (Def_Id, Arg2, Arg3);
4813 if No (Parameter_Specifications (Parent (Def_Id))) then
4814 Set_Has_Completion (Def_Id);
4815 Set_Is_Constructor (Def_Id);
4818 ("non-default constructors not implemented", Arg1);
4823 ("pragma% requires function returning a 'C'P'P_Class type",
4826 end CPP_Constructor;
4832 -- pragma CPP_Virtual
4833 -- [Entity =>] LOCAL_NAME
4834 -- [ [Vtable_Ptr =>] LOCAL_NAME,
4835 -- [Position =>] static_integer_EXPRESSION]);
4837 when Pragma_CPP_Virtual => CPP_Virtual : declare
4841 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4848 if Arg_Count = 3 then
4849 Check_Optional_Identifier (Arg2, "vtable_ptr");
4851 -- We allow Entry_Count as well as Position for the third
4852 -- parameter for back compatibility with versions of GNAT
4853 -- before version 3.12. The documentation has always said
4854 -- Position, but the code up to 3.12 said Entry_Count.
4856 if Chars (Arg3) /= Name_Position then
4857 Check_Optional_Identifier (Arg3, "entry_count");
4861 Check_Arg_Count (1);
4864 Check_Optional_Identifier (Arg1, Name_Entity);
4865 Check_Arg_Is_Local_Name (Arg1);
4867 -- First argument must be a subprogram name
4869 Arg := Expression (Arg1);
4870 Find_Program_Unit_Name (Arg);
4872 if Etype (Arg) = Any_Type then
4875 Subp := Entity (Arg);
4878 if not (Is_Subprogram (Subp)
4879 and then Is_Dispatching_Operation (Subp))
4882 ("pragma% must reference a primitive operation", Arg1);
4885 Typ := Find_Dispatching_Type (Subp);
4887 -- If only one Argument defaults are :
4888 -- . DTC_Entity is the default Vtable pointer
4889 -- . DT_Position will be set at the freezing point
4891 if Arg_Count = 1 then
4892 Set_DTC_Entity (Subp, Tag_Component (Typ));
4896 -- Second argument is a component name of type Vtable_Ptr
4898 Arg := Expression (Arg2);
4900 if Nkind (Arg) /= N_Identifier then
4901 Error_Msg_NE ("must be a& component name", Arg, Typ);
4905 DTC := First_Component (Typ);
4906 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
4907 Next_Component (DTC);
4911 Error_Msg_NE ("must be a& component name", Arg, Typ);
4914 elsif Etype (DTC) /= VTP_Type then
4915 Wrong_Type (Arg, VTP_Type);
4919 -- Third argument is an integer (DT_Position)
4921 Arg := Expression (Arg3);
4922 Analyze_And_Resolve (Arg, Any_Integer);
4924 if not Is_Static_Expression (Arg) then
4925 Flag_Non_Static_Expr
4926 ("third argument of pragma CPP_Virtual must be static!",
4931 V := Expr_Value (Expression (Arg3));
4935 ("third argument of pragma% must be positive",
4939 Set_DTC_Entity (Subp, DTC);
4940 Set_DT_Position (Subp, V);
4949 -- pragma CPP_Vtable (
4950 -- [Entity =>] LOCAL_NAME
4951 -- [Vtable_Ptr =>] LOCAL_NAME,
4952 -- [Entry_Count =>] static_integer_EXPRESSION);
4954 when Pragma_CPP_Vtable => CPP_Vtable : declare
4957 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4964 Check_Arg_Count (3);
4965 Check_Optional_Identifier (Arg1, Name_Entity);
4966 Check_Optional_Identifier (Arg2, "vtable_ptr");
4967 Check_Optional_Identifier (Arg3, "entry_count");
4968 Check_Arg_Is_Local_Name (Arg1);
4970 -- First argument is a record type name
4972 Arg := Expression (Arg1);
4975 if Etype (Arg) = Any_Type then
4978 Typ := Entity (Arg);
4981 if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
4982 Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
4985 -- Second argument is a component name of type Vtable_Ptr
4987 Arg := Expression (Arg2);
4989 if Nkind (Arg) /= N_Identifier then
4990 Error_Msg_NE ("must be a& component name", Arg, Typ);
4994 DTC := First_Component (Typ);
4995 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
4996 Next_Component (DTC);
5000 Error_Msg_NE ("must be a& component name", Arg, Typ);
5003 elsif Etype (DTC) /= VTP_Type then
5004 Wrong_Type (DTC, VTP_Type);
5007 -- If it is the first pragma Vtable, This becomes the default tag
5009 elsif (not Is_Tag (DTC))
5010 and then DT_Entry_Count (Tag_Component (Typ)) = No_Uint
5012 Set_Is_Tag (Tag_Component (Typ), False);
5013 Set_Is_Tag (DTC, True);
5014 Set_DT_Entry_Count (DTC, No_Uint);
5017 -- Those pragmas must appear before any primitive operation
5018 -- definition (except inherited ones) otherwise the default
5021 Elmt := First_Elmt (Primitive_Operations (Typ));
5022 while Present (Elmt) loop
5023 if No (Alias (Node (Elmt))) then
5024 Error_Msg_Sloc := Sloc (Node (Elmt));
5026 ("pragma% must appear before this primitive operation");
5032 -- Third argument is an integer (DT_Entry_Count)
5034 Arg := Expression (Arg3);
5035 Analyze_And_Resolve (Arg, Any_Integer);
5037 if not Is_Static_Expression (Arg) then
5038 Flag_Non_Static_Expr
5039 ("entry count for pragma CPP_Vtable must be a static " &
5040 "expression!", Arg3);
5044 V := Expr_Value (Expression (Arg3));
5048 ("entry count for pragma% must be positive", Arg3);
5050 Set_DT_Entry_Count (DTC, V);
5059 -- pragma Debug (PROCEDURE_CALL_STATEMENT);
5061 when Pragma_Debug => Debug : begin
5064 -- If assertions are enabled, and we are expanding code, then
5065 -- we rewrite the pragma with its corresponding procedure call
5066 -- and then analyze the call.
5068 if Assertions_Enabled and Expander_Active then
5069 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5072 -- Otherwise we work a bit to get a tree that makes sense
5073 -- for ASIS purposes, namely a pragma with an analyzed
5074 -- argument that looks like a procedure call.
5077 Expander_Mode_Save_And_Set (False);
5078 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5082 Chars => Name_Debug,
5083 Pragma_Argument_Associations =>
5084 New_List (Relocate_Node (N))));
5085 Expander_Mode_Restore;
5093 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
5095 when Pragma_Discard_Names => Discard_Names : declare
5100 Check_Ada_83_Warning;
5102 -- Deal with configuration pragma case
5104 if Arg_Count = 0 and then Is_Configuration_Pragma then
5105 Global_Discard_Names := True;
5108 -- Otherwise, check correct appropriate context
5111 Check_Is_In_Decl_Part_Or_Package_Spec;
5113 if Arg_Count = 0 then
5115 -- If there is no parameter, then from now on this pragma
5116 -- applies to any enumeration, exception or tagged type
5117 -- defined in the current declarative part.
5119 Set_Discard_Names (Current_Scope);
5123 Check_Arg_Count (1);
5124 Check_Optional_Identifier (Arg1, Name_On);
5125 Check_Arg_Is_Local_Name (Arg1);
5126 E_Id := Expression (Arg1);
5128 if Etype (E_Id) = Any_Type then
5134 if (Is_First_Subtype (E)
5135 and then (Is_Enumeration_Type (E)
5136 or else Is_Tagged_Type (E)))
5137 or else Ekind (E) = E_Exception
5139 Set_Discard_Names (E);
5142 ("inappropriate entity for pragma%", Arg1);
5152 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
5154 when Pragma_Elaborate => Elaborate : declare
5156 Parent_Node : Node_Id;
5161 -- Pragma must be in context items list of a compilation unit
5163 if not Is_List_Member (N) then
5168 Plist := List_Containing (N);
5169 Parent_Node := Parent (Plist);
5171 if Parent_Node = Empty
5172 or else Nkind (Parent_Node) /= N_Compilation_Unit
5173 or else Context_Items (Parent_Node) /= Plist
5180 -- Must be at least one argument
5182 if Arg_Count = 0 then
5183 Error_Pragma ("pragma% requires at least one argument");
5186 -- In Ada 83 mode, there can be no items following it in the
5187 -- context list except other pragmas and implicit with clauses
5188 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
5189 -- placement rule does not apply.
5191 if Ada_83 and then Comes_From_Source (N) then
5194 while Present (Citem) loop
5195 if Nkind (Citem) = N_Pragma
5196 or else (Nkind (Citem) = N_With_Clause
5197 and then Implicit_With (Citem))
5202 ("(Ada 83) pragma% must be at end of context clause");
5209 -- Finally, the arguments must all be units mentioned in a with
5210 -- clause in the same context clause. Note we already checked
5211 -- (in Par.Prag) that the arguments are either identifiers or
5214 Outer : while Present (Arg) loop
5215 Citem := First (Plist);
5217 Inner : while Citem /= N loop
5218 if Nkind (Citem) = N_With_Clause
5219 and then Same_Name (Name (Citem), Expression (Arg))
5221 Set_Elaborate_Present (Citem, True);
5222 Set_Unit_Name (Expression (Arg), Name (Citem));
5223 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5232 ("argument of pragma% is not with'ed unit", Arg);
5238 -- Give a warning if operating in static mode with -gnatwl
5239 -- (elaboration warnings eanbled) switch set.
5241 if Elab_Warnings and not Dynamic_Elaboration_Checks then
5243 ("?use of pragma Elaborate may not be safe", N);
5245 ("?use pragma Elaborate_All instead if possible", N);
5253 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
5255 when Pragma_Elaborate_All => Elaborate_All : declare
5257 Parent_Node : Node_Id;
5262 Check_Ada_83_Warning;
5264 -- Pragma must be in context items list of a compilation unit
5266 if not Is_List_Member (N) then
5271 Plist := List_Containing (N);
5272 Parent_Node := Parent (Plist);
5274 if Parent_Node = Empty
5275 or else Nkind (Parent_Node) /= N_Compilation_Unit
5276 or else Context_Items (Parent_Node) /= Plist
5283 -- Must be at least one argument
5285 if Arg_Count = 0 then
5286 Error_Pragma ("pragma% requires at least one argument");
5289 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
5290 -- have to appear at the end of the context clause, but may
5291 -- appear mixed in with other items, even in Ada 83 mode.
5293 -- Final check: the arguments must all be units mentioned in
5294 -- a with clause in the same context clause. Note that we
5295 -- already checked (in Par.Prag) that all the arguments are
5296 -- either identifiers or selected components.
5299 Outr : while Present (Arg) loop
5300 Citem := First (Plist);
5302 Innr : while Citem /= N loop
5303 if Nkind (Citem) = N_With_Clause
5304 and then Same_Name (Name (Citem), Expression (Arg))
5306 Set_Elaborate_All_Present (Citem, True);
5307 Set_Unit_Name (Expression (Arg), Name (Citem));
5308 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5316 Set_Error_Posted (N);
5318 ("argument of pragma% is not with'ed unit", Arg);
5325 --------------------
5326 -- Elaborate_Body --
5327 --------------------
5329 -- pragma Elaborate_Body [( library_unit_NAME )];
5331 when Pragma_Elaborate_Body => Elaborate_Body : declare
5332 Cunit_Node : Node_Id;
5333 Cunit_Ent : Entity_Id;
5336 Check_Ada_83_Warning;
5337 Check_Valid_Library_Unit_Pragma;
5339 if Nkind (N) = N_Null_Statement then
5343 Cunit_Node := Cunit (Current_Sem_Unit);
5344 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
5346 if Nkind (Unit (Cunit_Node)) = N_Package_Body
5348 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
5350 Error_Pragma ("pragma% must refer to a spec, not a body");
5352 Set_Body_Required (Cunit_Node, True);
5353 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
5355 -- If we are in dynamic elaboration mode, then we suppress
5356 -- elaboration warnings for the unit, since it is definitely
5357 -- fine NOT to do dynamic checks at the first level (and such
5358 -- checks will be suppressed because no elaboration boolean
5359 -- is created for Elaborate_Body packages).
5361 -- But in the static model of elaboration, Elaborate_Body is
5362 -- definitely NOT good enough to ensure elaboration safety on
5363 -- its own, since the body may WITH other units that are not
5364 -- safe from an elaboration point of view, so a client must
5365 -- still do an Elaborate_All on such units.
5367 -- Debug flag -gnatdD restores the old behavior of 3.13,
5368 -- where Elaborate_Body always suppressed elab warnings.
5370 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
5371 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
5376 ------------------------
5377 -- Elaboration_Checks --
5378 ------------------------
5380 -- pragma Elaboration_Checks (Static | Dynamic);
5382 when Pragma_Elaboration_Checks =>
5384 Check_Arg_Count (1);
5385 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
5386 Dynamic_Elaboration_Checks :=
5387 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
5393 -- pragma Eliminate (
5394 -- [Unit_Name =>] IDENTIFIER |
5395 -- SELECTED_COMPONENT
5396 -- [,[Entity =>] IDENTIFIER |
5397 -- SELECTED_COMPONENT |
5399 -- [,[Parameter_Types =>] PARAMETER_TYPES]
5400 -- [,[Result_Type =>] result_SUBTYPE_NAME]
5401 -- [,[Homonym_Number =>] INTEGER_LITERAL]);
5403 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
5404 -- SUBTYPE_NAME ::= STRING_LITERAL
5406 when Pragma_Eliminate => Eliminate : declare
5407 Args : Args_List (1 .. 5);
5408 Names : constant Name_List (1 .. 5) := (
5411 Name_Parameter_Types,
5413 Name_Homonym_Number);
5415 Unit_Name : Node_Id renames Args (1);
5416 Entity : Node_Id renames Args (2);
5417 Parameter_Types : Node_Id renames Args (3);
5418 Result_Type : Node_Id renames Args (4);
5419 Homonym_Number : Node_Id renames Args (5);
5423 Check_Valid_Configuration_Pragma;
5424 Gather_Associations (Names, Args);
5426 if No (Unit_Name) then
5427 Error_Pragma ("missing Unit_Name argument for pragma%");
5431 and then (Present (Parameter_Types)
5433 Present (Result_Type)
5435 Present (Homonym_Number))
5437 Error_Pragma ("missing Entity argument for pragma%");
5440 Process_Eliminate_Pragma
5449 --------------------------
5450 -- Explicit_Overriding --
5451 --------------------------
5453 when Pragma_Explicit_Overriding =>
5454 Check_Valid_Configuration_Pragma;
5455 Check_Arg_Count (0);
5456 Explicit_Overriding := True;
5463 -- [ Convention =>] convention_IDENTIFIER,
5464 -- [ Entity =>] local_NAME
5465 -- [, [External_Name =>] static_string_EXPRESSION ]
5466 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5468 when Pragma_Export => Export : declare
5473 Check_Ada_83_Warning;
5474 Check_At_Least_N_Arguments (2);
5475 Check_At_Most_N_Arguments (4);
5476 Process_Convention (C, Def_Id);
5478 if Ekind (Def_Id) /= E_Constant then
5479 Note_Possible_Modification (Expression (Arg2));
5482 Process_Interface_Name (Def_Id, Arg3, Arg4);
5483 Set_Exported (Def_Id, Arg2);
5486 ----------------------
5487 -- Export_Exception --
5488 ----------------------
5490 -- pragma Export_Exception (
5491 -- [Internal =>] LOCAL_NAME,
5492 -- [, [External =>] EXTERNAL_SYMBOL,]
5493 -- [, [Form =>] Ada | VMS]
5494 -- [, [Code =>] static_integer_EXPRESSION]);
5496 when Pragma_Export_Exception => Export_Exception : declare
5497 Args : Args_List (1 .. 4);
5498 Names : constant Name_List (1 .. 4) := (
5504 Internal : Node_Id renames Args (1);
5505 External : Node_Id renames Args (2);
5506 Form : Node_Id renames Args (3);
5507 Code : Node_Id renames Args (4);
5510 if Inside_A_Generic then
5511 Error_Pragma ("pragma% cannot be used for generic entities");
5514 Gather_Associations (Names, Args);
5515 Process_Extended_Import_Export_Exception_Pragma (
5516 Arg_Internal => Internal,
5517 Arg_External => External,
5521 if not Is_VMS_Exception (Entity (Internal)) then
5522 Set_Exported (Entity (Internal), Internal);
5524 end Export_Exception;
5526 ---------------------
5527 -- Export_Function --
5528 ---------------------
5530 -- pragma Export_Function (
5531 -- [Internal =>] LOCAL_NAME,
5532 -- [, [External =>] EXTERNAL_SYMBOL,]
5533 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5534 -- [, [Result_Type =>] TYPE_DESIGNATOR]
5535 -- [, [Mechanism =>] MECHANISM]
5536 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
5538 -- EXTERNAL_SYMBOL ::=
5540 -- | static_string_EXPRESSION
5542 -- PARAMETER_TYPES ::=
5544 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5546 -- TYPE_DESIGNATOR ::=
5548 -- | subtype_Name ' Access
5552 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5554 -- MECHANISM_ASSOCIATION ::=
5555 -- [formal_parameter_NAME =>] MECHANISM_NAME
5557 -- MECHANISM_NAME ::=
5560 -- | Descriptor [([Class =>] CLASS_NAME)]
5562 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5564 when Pragma_Export_Function => Export_Function : declare
5565 Args : Args_List (1 .. 6);
5566 Names : constant Name_List (1 .. 6) := (
5569 Name_Parameter_Types,
5572 Name_Result_Mechanism);
5574 Internal : Node_Id renames Args (1);
5575 External : Node_Id renames Args (2);
5576 Parameter_Types : Node_Id renames Args (3);
5577 Result_Type : Node_Id renames Args (4);
5578 Mechanism : Node_Id renames Args (5);
5579 Result_Mechanism : Node_Id renames Args (6);
5583 Gather_Associations (Names, Args);
5584 Process_Extended_Import_Export_Subprogram_Pragma (
5585 Arg_Internal => Internal,
5586 Arg_External => External,
5587 Arg_Parameter_Types => Parameter_Types,
5588 Arg_Result_Type => Result_Type,
5589 Arg_Mechanism => Mechanism,
5590 Arg_Result_Mechanism => Result_Mechanism);
5591 end Export_Function;
5597 -- pragma Export_Object (
5598 -- [Internal =>] LOCAL_NAME,
5599 -- [, [External =>] EXTERNAL_SYMBOL]
5600 -- [, [Size =>] EXTERNAL_SYMBOL]);
5602 -- EXTERNAL_SYMBOL ::=
5604 -- | static_string_EXPRESSION
5606 -- PARAMETER_TYPES ::=
5608 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5610 -- TYPE_DESIGNATOR ::=
5612 -- | subtype_Name ' Access
5616 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5618 -- MECHANISM_ASSOCIATION ::=
5619 -- [formal_parameter_NAME =>] MECHANISM_NAME
5621 -- MECHANISM_NAME ::=
5624 -- | Descriptor [([Class =>] CLASS_NAME)]
5626 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5628 when Pragma_Export_Object => Export_Object : declare
5629 Args : Args_List (1 .. 3);
5630 Names : constant Name_List (1 .. 3) := (
5635 Internal : Node_Id renames Args (1);
5636 External : Node_Id renames Args (2);
5637 Size : Node_Id renames Args (3);
5641 Gather_Associations (Names, Args);
5642 Process_Extended_Import_Export_Object_Pragma (
5643 Arg_Internal => Internal,
5644 Arg_External => External,
5648 ----------------------
5649 -- Export_Procedure --
5650 ----------------------
5652 -- pragma Export_Procedure (
5653 -- [Internal =>] LOCAL_NAME,
5654 -- [, [External =>] EXTERNAL_SYMBOL,]
5655 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5656 -- [, [Mechanism =>] MECHANISM]);
5658 -- EXTERNAL_SYMBOL ::=
5660 -- | static_string_EXPRESSION
5662 -- PARAMETER_TYPES ::=
5664 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5666 -- TYPE_DESIGNATOR ::=
5668 -- | subtype_Name ' Access
5672 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5674 -- MECHANISM_ASSOCIATION ::=
5675 -- [formal_parameter_NAME =>] MECHANISM_NAME
5677 -- MECHANISM_NAME ::=
5680 -- | Descriptor [([Class =>] CLASS_NAME)]
5682 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5684 when Pragma_Export_Procedure => Export_Procedure : declare
5685 Args : Args_List (1 .. 4);
5686 Names : constant Name_List (1 .. 4) := (
5689 Name_Parameter_Types,
5692 Internal : Node_Id renames Args (1);
5693 External : Node_Id renames Args (2);
5694 Parameter_Types : Node_Id renames Args (3);
5695 Mechanism : Node_Id renames Args (4);
5699 Gather_Associations (Names, Args);
5700 Process_Extended_Import_Export_Subprogram_Pragma (
5701 Arg_Internal => Internal,
5702 Arg_External => External,
5703 Arg_Parameter_Types => Parameter_Types,
5704 Arg_Mechanism => Mechanism);
5705 end Export_Procedure;
5711 -- pragma Export_Value (
5712 -- [Value =>] static_integer_EXPRESSION,
5713 -- [Link_Name =>] static_string_EXPRESSION);
5715 when Pragma_Export_Value =>
5717 Check_Arg_Count (2);
5719 Check_Optional_Identifier (Arg1, Name_Value);
5720 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
5722 Check_Optional_Identifier (Arg2, Name_Link_Name);
5723 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
5725 -----------------------------
5726 -- Export_Valued_Procedure --
5727 -----------------------------
5729 -- pragma Export_Valued_Procedure (
5730 -- [Internal =>] LOCAL_NAME,
5731 -- [, [External =>] EXTERNAL_SYMBOL,]
5732 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5733 -- [, [Mechanism =>] MECHANISM]);
5735 -- EXTERNAL_SYMBOL ::=
5737 -- | static_string_EXPRESSION
5739 -- PARAMETER_TYPES ::=
5741 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5743 -- TYPE_DESIGNATOR ::=
5745 -- | subtype_Name ' Access
5749 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5751 -- MECHANISM_ASSOCIATION ::=
5752 -- [formal_parameter_NAME =>] MECHANISM_NAME
5754 -- MECHANISM_NAME ::=
5757 -- | Descriptor [([Class =>] CLASS_NAME)]
5759 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5761 when Pragma_Export_Valued_Procedure =>
5762 Export_Valued_Procedure : declare
5763 Args : Args_List (1 .. 4);
5764 Names : constant Name_List (1 .. 4) := (
5767 Name_Parameter_Types,
5770 Internal : Node_Id renames Args (1);
5771 External : Node_Id renames Args (2);
5772 Parameter_Types : Node_Id renames Args (3);
5773 Mechanism : Node_Id renames Args (4);
5777 Gather_Associations (Names, Args);
5778 Process_Extended_Import_Export_Subprogram_Pragma (
5779 Arg_Internal => Internal,
5780 Arg_External => External,
5781 Arg_Parameter_Types => Parameter_Types,
5782 Arg_Mechanism => Mechanism);
5783 end Export_Valued_Procedure;
5789 -- pragma Extend_System ([Name =>] Identifier);
5791 when Pragma_Extend_System => Extend_System : declare
5794 Check_Valid_Configuration_Pragma;
5795 Check_Arg_Count (1);
5796 Check_Optional_Identifier (Arg1, Name_Name);
5797 Check_Arg_Is_Identifier (Arg1);
5799 Get_Name_String (Chars (Expression (Arg1)));
5802 and then Name_Buffer (1 .. 4) = "aux_"
5804 if Present (System_Extend_Pragma_Arg) then
5805 if Chars (Expression (Arg1)) =
5806 Chars (Expression (System_Extend_Pragma_Arg))
5810 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
5811 Error_Pragma ("pragma% conflicts with that at#");
5815 System_Extend_Pragma_Arg := Arg1;
5817 if not GNAT_Mode then
5818 System_Extend_Unit := Arg1;
5822 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
5826 ------------------------
5827 -- Extensions_Allowed --
5828 ------------------------
5830 -- pragma Extensions_Allowed (ON | OFF);
5832 when Pragma_Extensions_Allowed =>
5834 Check_Arg_Count (1);
5835 Check_No_Identifiers;
5836 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5837 Extensions_Allowed := (Chars (Expression (Arg1)) = Name_On);
5843 -- pragma External (
5844 -- [ Convention =>] convention_IDENTIFIER,
5845 -- [ Entity =>] local_NAME
5846 -- [, [External_Name =>] static_string_EXPRESSION ]
5847 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5849 when Pragma_External => External : declare
5855 Check_At_Least_N_Arguments (2);
5856 Check_At_Most_N_Arguments (4);
5857 Process_Convention (C, Def_Id);
5858 Note_Possible_Modification (Expression (Arg2));
5859 Process_Interface_Name (Def_Id, Arg3, Arg4);
5860 Set_Exported (Def_Id, Arg2);
5863 --------------------------
5864 -- External_Name_Casing --
5865 --------------------------
5867 -- pragma External_Name_Casing (
5868 -- UPPERCASE | LOWERCASE
5869 -- [, AS_IS | UPPERCASE | LOWERCASE]);
5871 when Pragma_External_Name_Casing =>
5873 External_Name_Casing : declare
5876 Check_No_Identifiers;
5878 if Arg_Count = 2 then
5880 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
5882 case Chars (Get_Pragma_Arg (Arg2)) is
5884 Opt.External_Name_Exp_Casing := As_Is;
5886 when Name_Uppercase =>
5887 Opt.External_Name_Exp_Casing := Uppercase;
5889 when Name_Lowercase =>
5890 Opt.External_Name_Exp_Casing := Lowercase;
5897 Check_Arg_Count (1);
5900 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
5902 case Chars (Get_Pragma_Arg (Arg1)) is
5903 when Name_Uppercase =>
5904 Opt.External_Name_Imp_Casing := Uppercase;
5906 when Name_Lowercase =>
5907 Opt.External_Name_Imp_Casing := Lowercase;
5912 end External_Name_Casing;
5914 ---------------------------
5915 -- Finalize_Storage_Only --
5916 ---------------------------
5918 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
5920 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
5921 Assoc : constant Node_Id := Arg1;
5922 Type_Id : constant Node_Id := Expression (Assoc);
5926 Check_No_Identifiers;
5927 Check_Arg_Count (1);
5928 Check_Arg_Is_Local_Name (Arg1);
5930 Find_Type (Type_Id);
5931 Typ := Entity (Type_Id);
5934 or else Rep_Item_Too_Early (Typ, N)
5938 Typ := Underlying_Type (Typ);
5941 if not Is_Controlled (Typ) then
5942 Error_Pragma ("pragma% must specify controlled type");
5945 Check_First_Subtype (Arg1);
5947 if Finalize_Storage_Only (Typ) then
5948 Error_Pragma ("duplicate pragma%, only one allowed");
5950 elsif not Rep_Item_Too_Late (Typ, N) then
5951 Set_Finalize_Storage_Only (Base_Type (Typ), True);
5953 end Finalize_Storage;
5955 --------------------------
5956 -- Float_Representation --
5957 --------------------------
5959 -- pragma Float_Representation (VAX_Float | IEEE_Float);
5961 when Pragma_Float_Representation => Float_Representation : declare
5969 if Arg_Count = 1 then
5970 Check_Valid_Configuration_Pragma;
5972 Check_Arg_Count (2);
5973 Check_Optional_Identifier (Arg2, Name_Entity);
5974 Check_Arg_Is_Local_Name (Arg2);
5977 Check_No_Identifier (Arg1);
5978 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
5980 if not OpenVMS_On_Target then
5981 if Chars (Expression (Arg1)) = Name_VAX_Float then
5983 ("?pragma% ignored (applies only to Open'V'M'S)");
5989 -- One argument case
5991 if Arg_Count = 1 then
5993 if Chars (Expression (Arg1)) = Name_VAX_Float then
5995 if Opt.Float_Format = 'I' then
5996 Error_Pragma ("'I'E'E'E format previously specified");
5999 Opt.Float_Format := 'V';
6002 if Opt.Float_Format = 'V' then
6003 Error_Pragma ("'V'A'X format previously specified");
6006 Opt.Float_Format := 'I';
6009 Set_Standard_Fpt_Formats;
6011 -- Two argument case
6014 Argx := Get_Pragma_Arg (Arg2);
6016 if not Is_Entity_Name (Argx)
6017 or else not Is_Floating_Point_Type (Entity (Argx))
6020 ("second argument of% pragma must be floating-point type",
6024 Ent := Entity (Argx);
6025 Digs := UI_To_Int (Digits_Value (Ent));
6027 -- Two arguments, VAX_Float case
6029 if Chars (Expression (Arg1)) = Name_VAX_Float then
6032 when 6 => Set_F_Float (Ent);
6033 when 9 => Set_D_Float (Ent);
6034 when 15 => Set_G_Float (Ent);
6038 ("wrong digits value, must be 6,9 or 15", Arg2);
6041 -- Two arguments, IEEE_Float case
6045 when 6 => Set_IEEE_Short (Ent);
6046 when 15 => Set_IEEE_Long (Ent);
6050 ("wrong digits value, must be 6 or 15", Arg2);
6054 end Float_Representation;
6060 -- pragma Ident (static_string_EXPRESSION)
6062 -- Note: pragma Comment shares this processing. Pragma Comment
6063 -- is identical to Ident, except that the restriction of the
6064 -- argument to 31 characters and the placement restrictions
6065 -- are not enforced for pragma Comment.
6067 when Pragma_Ident | Pragma_Comment => Ident : declare
6072 Check_Arg_Count (1);
6073 Check_No_Identifiers;
6074 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
6076 -- For pragma Ident, preserve DEC compatibility by requiring
6077 -- the pragma to appear in a declarative part or package spec.
6079 if Prag_Id = Pragma_Ident then
6080 Check_Is_In_Decl_Part_Or_Package_Spec;
6083 Str := Expr_Value_S (Expression (Arg1));
6090 GP := Parent (Parent (N));
6092 if Nkind (GP) = N_Package_Declaration
6094 Nkind (GP) = N_Generic_Package_Declaration
6099 -- If we have a compilation unit, then record the ident
6100 -- value, checking for improper duplication.
6102 if Nkind (GP) = N_Compilation_Unit then
6103 CS := Ident_String (Current_Sem_Unit);
6105 if Present (CS) then
6107 -- For Ident, we do not permit multiple instances
6109 if Prag_Id = Pragma_Ident then
6110 Error_Pragma ("duplicate% pragma not permitted");
6112 -- For Comment, we concatenate the string, unless we
6113 -- want to preserve the tree structure for ASIS.
6115 elsif not ASIS_Mode then
6116 Start_String (Strval (CS));
6117 Store_String_Char (' ');
6118 Store_String_Chars (Strval (Str));
6119 Set_Strval (CS, End_String);
6123 -- In VMS, the effect of IDENT is achieved by passing
6124 -- IDENTIFICATION=name as a --for-linker switch.
6126 if OpenVMS_On_Target then
6129 ("--for-linker=IDENTIFICATION=");
6130 String_To_Name_Buffer (Strval (Str));
6131 Store_String_Chars (Name_Buffer (1 .. Name_Len));
6133 -- Only the last processed IDENT is saved. The main
6134 -- purpose is so an IDENT associated with a main
6135 -- procedure will be used in preference to an IDENT
6136 -- associated with a with'd package.
6138 Replace_Linker_Option_String
6139 (End_String, "--for-linker=IDENTIFICATION=");
6142 Set_Ident_String (Current_Sem_Unit, Str);
6145 -- For subunits, we just ignore the Ident, since in GNAT
6146 -- these are not separate object files, and hence not
6147 -- separate units in the unit table.
6149 elsif Nkind (GP) = N_Subunit then
6152 -- Otherwise we have a misplaced pragma Ident, but we ignore
6153 -- this if we are in an instantiation, since it comes from
6154 -- a generic, and has no relevance to the instantiation.
6156 elsif Prag_Id = Pragma_Ident then
6157 if Instantiation_Location (Loc) = No_Location then
6158 Error_Pragma ("pragma% only allowed at outer level");
6169 -- [ Convention =>] convention_IDENTIFIER,
6170 -- [ Entity =>] local_NAME
6171 -- [, [External_Name =>] static_string_EXPRESSION ]
6172 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6174 when Pragma_Import =>
6175 Check_Ada_83_Warning;
6176 Check_At_Least_N_Arguments (2);
6177 Check_At_Most_N_Arguments (4);
6178 Process_Import_Or_Interface;
6180 ----------------------
6181 -- Import_Exception --
6182 ----------------------
6184 -- pragma Import_Exception (
6185 -- [Internal =>] LOCAL_NAME,
6186 -- [, [External =>] EXTERNAL_SYMBOL,]
6187 -- [, [Form =>] Ada | VMS]
6188 -- [, [Code =>] static_integer_EXPRESSION]);
6190 when Pragma_Import_Exception => Import_Exception : declare
6191 Args : Args_List (1 .. 4);
6192 Names : constant Name_List (1 .. 4) := (
6198 Internal : Node_Id renames Args (1);
6199 External : Node_Id renames Args (2);
6200 Form : Node_Id renames Args (3);
6201 Code : Node_Id renames Args (4);
6204 Gather_Associations (Names, Args);
6206 if Present (External) and then Present (Code) then
6208 ("cannot give both External and Code options for pragma%");
6211 Process_Extended_Import_Export_Exception_Pragma (
6212 Arg_Internal => Internal,
6213 Arg_External => External,
6217 if not Is_VMS_Exception (Entity (Internal)) then
6218 Set_Imported (Entity (Internal));
6220 end Import_Exception;
6222 ---------------------
6223 -- Import_Function --
6224 ---------------------
6226 -- pragma Import_Function (
6227 -- [Internal =>] LOCAL_NAME,
6228 -- [, [External =>] EXTERNAL_SYMBOL]
6229 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6230 -- [, [Result_Type =>] SUBTYPE_MARK]
6231 -- [, [Mechanism =>] MECHANISM]
6232 -- [, [Result_Mechanism =>] MECHANISM_NAME]
6233 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6235 -- EXTERNAL_SYMBOL ::=
6237 -- | static_string_EXPRESSION
6239 -- PARAMETER_TYPES ::=
6241 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6243 -- TYPE_DESIGNATOR ::=
6245 -- | subtype_Name ' Access
6249 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6251 -- MECHANISM_ASSOCIATION ::=
6252 -- [formal_parameter_NAME =>] MECHANISM_NAME
6254 -- MECHANISM_NAME ::=
6257 -- | Descriptor [([Class =>] CLASS_NAME)]
6259 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6261 when Pragma_Import_Function => Import_Function : declare
6262 Args : Args_List (1 .. 7);
6263 Names : constant Name_List (1 .. 7) := (
6266 Name_Parameter_Types,
6269 Name_Result_Mechanism,
6270 Name_First_Optional_Parameter);
6272 Internal : Node_Id renames Args (1);
6273 External : Node_Id renames Args (2);
6274 Parameter_Types : Node_Id renames Args (3);
6275 Result_Type : Node_Id renames Args (4);
6276 Mechanism : Node_Id renames Args (5);
6277 Result_Mechanism : Node_Id renames Args (6);
6278 First_Optional_Parameter : Node_Id renames Args (7);
6282 Gather_Associations (Names, Args);
6283 Process_Extended_Import_Export_Subprogram_Pragma (
6284 Arg_Internal => Internal,
6285 Arg_External => External,
6286 Arg_Parameter_Types => Parameter_Types,
6287 Arg_Result_Type => Result_Type,
6288 Arg_Mechanism => Mechanism,
6289 Arg_Result_Mechanism => Result_Mechanism,
6290 Arg_First_Optional_Parameter => First_Optional_Parameter);
6291 end Import_Function;
6297 -- pragma Import_Object (
6298 -- [Internal =>] LOCAL_NAME,
6299 -- [, [External =>] EXTERNAL_SYMBOL]
6300 -- [, [Size =>] EXTERNAL_SYMBOL]);
6302 -- EXTERNAL_SYMBOL ::=
6304 -- | static_string_EXPRESSION
6306 when Pragma_Import_Object => Import_Object : declare
6307 Args : Args_List (1 .. 3);
6308 Names : constant Name_List (1 .. 3) := (
6313 Internal : Node_Id renames Args (1);
6314 External : Node_Id renames Args (2);
6315 Size : Node_Id renames Args (3);
6319 Gather_Associations (Names, Args);
6320 Process_Extended_Import_Export_Object_Pragma (
6321 Arg_Internal => Internal,
6322 Arg_External => External,
6326 ----------------------
6327 -- Import_Procedure --
6328 ----------------------
6330 -- pragma Import_Procedure (
6331 -- [Internal =>] LOCAL_NAME,
6332 -- [, [External =>] EXTERNAL_SYMBOL]
6333 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6334 -- [, [Mechanism =>] MECHANISM]
6335 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6337 -- EXTERNAL_SYMBOL ::=
6339 -- | static_string_EXPRESSION
6341 -- PARAMETER_TYPES ::=
6343 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6345 -- TYPE_DESIGNATOR ::=
6347 -- | subtype_Name ' Access
6351 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6353 -- MECHANISM_ASSOCIATION ::=
6354 -- [formal_parameter_NAME =>] MECHANISM_NAME
6356 -- MECHANISM_NAME ::=
6359 -- | Descriptor [([Class =>] CLASS_NAME)]
6361 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6363 when Pragma_Import_Procedure => Import_Procedure : declare
6364 Args : Args_List (1 .. 5);
6365 Names : constant Name_List (1 .. 5) := (
6368 Name_Parameter_Types,
6370 Name_First_Optional_Parameter);
6372 Internal : Node_Id renames Args (1);
6373 External : Node_Id renames Args (2);
6374 Parameter_Types : Node_Id renames Args (3);
6375 Mechanism : Node_Id renames Args (4);
6376 First_Optional_Parameter : Node_Id renames Args (5);
6380 Gather_Associations (Names, Args);
6381 Process_Extended_Import_Export_Subprogram_Pragma (
6382 Arg_Internal => Internal,
6383 Arg_External => External,
6384 Arg_Parameter_Types => Parameter_Types,
6385 Arg_Mechanism => Mechanism,
6386 Arg_First_Optional_Parameter => First_Optional_Parameter);
6387 end Import_Procedure;
6389 -----------------------------
6390 -- Import_Valued_Procedure --
6391 -----------------------------
6393 -- pragma Import_Valued_Procedure (
6394 -- [Internal =>] LOCAL_NAME,
6395 -- [, [External =>] EXTERNAL_SYMBOL]
6396 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6397 -- [, [Mechanism =>] MECHANISM]
6398 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6400 -- EXTERNAL_SYMBOL ::=
6402 -- | static_string_EXPRESSION
6404 -- PARAMETER_TYPES ::=
6406 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6408 -- TYPE_DESIGNATOR ::=
6410 -- | subtype_Name ' Access
6414 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6416 -- MECHANISM_ASSOCIATION ::=
6417 -- [formal_parameter_NAME =>] MECHANISM_NAME
6419 -- MECHANISM_NAME ::=
6422 -- | Descriptor [([Class =>] CLASS_NAME)]
6424 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6426 when Pragma_Import_Valued_Procedure =>
6427 Import_Valued_Procedure : declare
6428 Args : Args_List (1 .. 5);
6429 Names : constant Name_List (1 .. 5) := (
6432 Name_Parameter_Types,
6434 Name_First_Optional_Parameter);
6436 Internal : Node_Id renames Args (1);
6437 External : Node_Id renames Args (2);
6438 Parameter_Types : Node_Id renames Args (3);
6439 Mechanism : Node_Id renames Args (4);
6440 First_Optional_Parameter : Node_Id renames Args (5);
6444 Gather_Associations (Names, Args);
6445 Process_Extended_Import_Export_Subprogram_Pragma (
6446 Arg_Internal => Internal,
6447 Arg_External => External,
6448 Arg_Parameter_Types => Parameter_Types,
6449 Arg_Mechanism => Mechanism,
6450 Arg_First_Optional_Parameter => First_Optional_Parameter);
6451 end Import_Valued_Procedure;
6453 ------------------------
6454 -- Initialize_Scalars --
6455 ------------------------
6457 -- pragma Initialize_Scalars;
6459 when Pragma_Initialize_Scalars =>
6461 Check_Arg_Count (0);
6462 Check_Valid_Configuration_Pragma;
6463 Check_Restriction (No_Initialize_Scalars, N);
6465 if not Restriction_Active (No_Initialize_Scalars) then
6466 Init_Or_Norm_Scalars := True;
6467 Initialize_Scalars := True;
6474 -- pragma Inline ( NAME {, NAME} );
6476 when Pragma_Inline =>
6478 -- Pragma is active if inlining option is active
6480 if Inline_Active then
6481 Process_Inline (True);
6483 -- Pragma is active in a predefined file in config run time mode
6485 elsif Configurable_Run_Time_Mode
6487 Is_Predefined_File_Name (Unit_File_Name (Current_Sem_Unit))
6489 Process_Inline (True);
6491 -- Otherwise inlining is not active
6494 Process_Inline (False);
6501 -- pragma Inline_Always ( NAME {, NAME} );
6503 when Pragma_Inline_Always =>
6504 Process_Inline (True);
6506 --------------------
6507 -- Inline_Generic --
6508 --------------------
6510 -- pragma Inline_Generic (NAME {, NAME});
6512 when Pragma_Inline_Generic =>
6513 Process_Generic_List;
6515 ----------------------
6516 -- Inspection_Point --
6517 ----------------------
6519 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
6521 when Pragma_Inspection_Point => Inspection_Point : declare
6526 if Arg_Count > 0 then
6529 Exp := Expression (Arg);
6532 if not Is_Entity_Name (Exp)
6533 or else not Is_Object (Entity (Exp))
6535 Error_Pragma_Arg ("object name required", Arg);
6542 end Inspection_Point;
6548 -- pragma Interface (
6549 -- convention_IDENTIFIER,
6552 when Pragma_Interface =>
6554 Check_Arg_Count (2);
6555 Check_No_Identifiers;
6556 Process_Import_Or_Interface;
6558 --------------------
6559 -- Interface_Name --
6560 --------------------
6562 -- pragma Interface_Name (
6563 -- [ Entity =>] local_NAME
6564 -- [,[External_Name =>] static_string_EXPRESSION ]
6565 -- [,[Link_Name =>] static_string_EXPRESSION ]);
6567 when Pragma_Interface_Name => Interface_Name : declare
6575 Check_At_Least_N_Arguments (2);
6576 Check_At_Most_N_Arguments (3);
6577 Id := Expression (Arg1);
6580 if not Is_Entity_Name (Id) then
6582 ("first argument for pragma% must be entity name", Arg1);
6583 elsif Etype (Id) = Any_Type then
6586 Def_Id := Entity (Id);
6589 -- Special DEC-compatible processing for the object case,
6590 -- forces object to be imported.
6592 if Ekind (Def_Id) = E_Variable then
6593 Kill_Size_Check_Code (Def_Id);
6594 Note_Possible_Modification (Id);
6596 -- Initialization is not allowed for imported variable
6598 if Present (Expression (Parent (Def_Id)))
6599 and then Comes_From_Source (Expression (Parent (Def_Id)))
6601 Error_Msg_Sloc := Sloc (Def_Id);
6603 ("no initialization allowed for declaration of& #",
6607 -- For compatibility, support VADS usage of providing both
6608 -- pragmas Interface and Interface_Name to obtain the effect
6609 -- of a single Import pragma.
6611 if Is_Imported (Def_Id)
6612 and then Present (First_Rep_Item (Def_Id))
6613 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
6614 and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
6618 Set_Imported (Def_Id);
6621 Set_Is_Public (Def_Id);
6622 Process_Interface_Name (Def_Id, Arg2, Arg3);
6625 -- Otherwise must be subprogram
6627 elsif not Is_Subprogram (Def_Id) then
6629 ("argument of pragma% is not subprogram", Arg1);
6632 Check_At_Most_N_Arguments (3);
6636 -- Loop through homonyms
6639 Def_Id := Get_Base_Subprogram (Hom_Id);
6641 if Is_Imported (Def_Id) then
6642 Process_Interface_Name (Def_Id, Arg2, Arg3);
6646 Hom_Id := Homonym (Hom_Id);
6648 exit when No (Hom_Id)
6649 or else Scope (Hom_Id) /= Current_Scope;
6654 ("argument of pragma% is not imported subprogram",
6660 -----------------------
6661 -- Interrupt_Handler --
6662 -----------------------
6664 -- pragma Interrupt_Handler (handler_NAME);
6666 when Pragma_Interrupt_Handler =>
6667 Check_Ada_83_Warning;
6668 Check_Arg_Count (1);
6669 Check_No_Identifiers;
6671 if No_Run_Time_Mode then
6672 Error_Msg_CRT ("Interrupt_Handler pragma", N);
6674 Check_Interrupt_Or_Attach_Handler;
6675 Process_Interrupt_Or_Attach_Handler;
6678 ------------------------
6679 -- Interrupt_Priority --
6680 ------------------------
6682 -- pragma Interrupt_Priority [(EXPRESSION)];
6684 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
6685 P : constant Node_Id := Parent (N);
6689 Check_Ada_83_Warning;
6691 if Arg_Count /= 0 then
6692 Arg := Expression (Arg1);
6693 Check_Arg_Count (1);
6694 Check_No_Identifiers;
6696 -- The expression must be analyzed in the special manner
6697 -- described in "Handling of Default and Per-Object
6698 -- Expressions" in sem.ads.
6700 Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
6703 if Nkind (P) /= N_Task_Definition
6704 and then Nkind (P) /= N_Protected_Definition
6709 elsif Has_Priority_Pragma (P) then
6710 Error_Pragma ("duplicate pragma% not allowed");
6713 Set_Has_Priority_Pragma (P, True);
6714 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
6716 end Interrupt_Priority;
6718 ---------------------
6719 -- Interrupt_State --
6720 ---------------------
6722 -- pragma Interrupt_State (
6723 -- [Name =>] INTERRUPT_ID,
6724 -- [State =>] INTERRUPT_STATE);
6726 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
6727 -- INTERRUPT_STATE => System | Runtime | User
6729 -- Note: if the interrupt id is given as an identifier, then
6730 -- it must be one of the identifiers in Ada.Interrupts.Names.
6731 -- Otherwise it is given as a static integer expression which
6732 -- must be in the range of Ada.Interrupts.Interrupt_ID.
6734 when Pragma_Interrupt_State => Interrupt_State : declare
6736 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
6737 -- This is the entity Ada.Interrupts.Interrupt_ID;
6739 State_Type : Character;
6740 -- Set to 's'/'r'/'u' for System/Runtime/User
6743 -- Index to entry in Interrupt_States table
6746 -- Value of interrupt
6748 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
6749 -- The first argument to the pragma
6751 Int_Ent : Entity_Id;
6752 -- Interrupt entity in Ada.Interrupts.Names
6756 Check_Arg_Count (2);
6758 Check_Optional_Identifier (Arg1, Name_Name);
6759 Check_Optional_Identifier (Arg2, "state");
6760 Check_Arg_Is_Identifier (Arg2);
6762 -- First argument is identifier
6764 if Nkind (Arg1X) = N_Identifier then
6766 -- Search list of names in Ada.Interrupts.Names
6768 Int_Ent := First_Entity (RTE (RE_Names));
6770 if No (Int_Ent) then
6771 Error_Pragma_Arg ("invalid interrupt name", Arg1);
6773 elsif Chars (Int_Ent) = Chars (Arg1X) then
6774 Int_Val := Expr_Value (Constant_Value (Int_Ent));
6778 Next_Entity (Int_Ent);
6781 -- First argument is not an identifier, so it must be a
6782 -- static expression of type Ada.Interrupts.Interrupt_ID.
6785 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6786 Int_Val := Expr_Value (Arg1X);
6788 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
6790 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
6793 ("value not in range of type " &
6794 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
6800 case Chars (Get_Pragma_Arg (Arg2)) is
6801 when Name_Runtime => State_Type := 'r';
6802 when Name_System => State_Type := 's';
6803 when Name_User => State_Type := 'u';
6806 Error_Pragma_Arg ("invalid interrupt state", Arg2);
6809 -- Check if entry is already stored
6811 IST_Num := Interrupt_States.First;
6813 -- If entry not found, add it
6815 if IST_Num > Interrupt_States.Last then
6816 Interrupt_States.Append
6817 ((Interrupt_Number => UI_To_Int (Int_Val),
6818 Interrupt_State => State_Type,
6819 Pragma_Loc => Loc));
6822 -- Case of entry for the same entry
6824 elsif Int_Val = Interrupt_States.Table (IST_Num).
6827 -- If state matches, done, no need to make redundant entry
6830 State_Type = Interrupt_States.Table (IST_Num).
6833 -- Otherwise if state does not match, error
6836 Interrupt_States.Table (IST_Num).Pragma_Loc;
6838 ("state conflicts with that given at #", Arg2);
6842 IST_Num := IST_Num + 1;
6844 end Interrupt_State;
6846 ----------------------
6847 -- Java_Constructor --
6848 ----------------------
6850 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
6852 when Pragma_Java_Constructor => Java_Constructor : declare
6859 Check_Arg_Count (1);
6860 Check_Optional_Identifier (Arg1, Name_Entity);
6861 Check_Arg_Is_Local_Name (Arg1);
6863 Id := Expression (Arg1);
6864 Find_Program_Unit_Name (Id);
6866 -- If we did not find the name, we are done
6868 if Etype (Id) = Any_Type then
6872 Hom_Id := Entity (Id);
6874 -- Loop through homonyms
6877 Def_Id := Get_Base_Subprogram (Hom_Id);
6879 -- The constructor is required to be a function returning
6880 -- an access type whose designated type has convention Java.
6882 if Ekind (Def_Id) = E_Function
6883 and then Ekind (Etype (Def_Id)) in Access_Kind
6886 (Designated_Type (Etype (Def_Id))) = Convention_Java
6889 (Root_Type (Designated_Type (Etype (Def_Id))))
6892 Set_Is_Constructor (Def_Id);
6893 Set_Convention (Def_Id, Convention_Java);
6897 ("pragma% requires function returning a 'Java access type",
6901 Hom_Id := Homonym (Hom_Id);
6903 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
6905 end Java_Constructor;
6907 ----------------------
6908 -- Java_Interface --
6909 ----------------------
6911 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
6913 when Pragma_Java_Interface => Java_Interface : declare
6919 Check_Arg_Count (1);
6920 Check_Optional_Identifier (Arg1, Name_Entity);
6921 Check_Arg_Is_Local_Name (Arg1);
6923 Arg := Expression (Arg1);
6926 if Etype (Arg) = Any_Type then
6930 if not Is_Entity_Name (Arg)
6931 or else not Is_Type (Entity (Arg))
6933 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6936 Typ := Underlying_Type (Entity (Arg));
6938 -- For now we simply check some of the semantic constraints
6939 -- on the type. This currently leaves out some restrictions
6940 -- on interface types, namely that the parent type must be
6941 -- java.lang.Object.Typ and that all primitives of the type
6942 -- should be declared abstract. ???
6944 if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
6945 Error_Pragma_Arg ("pragma% requires an abstract "
6946 & "tagged type", Arg1);
6948 elsif not Has_Discriminants (Typ)
6949 or else Ekind (Etype (First_Discriminant (Typ)))
6950 /= E_Anonymous_Access_Type
6952 not Is_Class_Wide_Type
6953 (Designated_Type (Etype (First_Discriminant (Typ))))
6956 ("type must have a class-wide access discriminant", Arg1);
6964 -- pragma Keep_Names ([On => ] local_NAME);
6966 when Pragma_Keep_Names => Keep_Names : declare
6971 Check_Arg_Count (1);
6972 Check_Optional_Identifier (Arg1, Name_On);
6973 Check_Arg_Is_Local_Name (Arg1);
6975 Arg := Expression (Arg1);
6978 if Etype (Arg) = Any_Type then
6982 if not Is_Entity_Name (Arg)
6983 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
6986 ("pragma% requires a local enumeration type", Arg1);
6989 Set_Discard_Names (Entity (Arg), False);
6996 -- pragma License (RESTRICTED | UNRESRICTED | GPL | MODIFIED_GPL);
6998 when Pragma_License =>
7000 Check_Arg_Count (1);
7001 Check_No_Identifiers;
7002 Check_Valid_Configuration_Pragma;
7003 Check_Arg_Is_Identifier (Arg1);
7006 Sind : constant Source_File_Index :=
7007 Source_Index (Current_Sem_Unit);
7010 case Chars (Get_Pragma_Arg (Arg1)) is
7012 Set_License (Sind, GPL);
7014 when Name_Modified_GPL =>
7015 Set_License (Sind, Modified_GPL);
7017 when Name_Restricted =>
7018 Set_License (Sind, Restricted);
7020 when Name_Unrestricted =>
7021 Set_License (Sind, Unrestricted);
7024 Error_Pragma_Arg ("invalid license name", Arg1);
7032 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
7034 when Pragma_Link_With => Link_With : declare
7040 if Operating_Mode = Generate_Code
7041 and then In_Extended_Main_Source_Unit (N)
7043 Check_At_Least_N_Arguments (1);
7044 Check_No_Identifiers;
7045 Check_Is_In_Decl_Part_Or_Package_Spec;
7046 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7050 while Present (Arg) loop
7051 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7053 -- Store argument, converting sequences of spaces
7054 -- to a single null character (this is one of the
7055 -- differences in processing between Link_With
7056 -- and Linker_Options).
7059 C : constant Char_Code := Get_Char_Code (' ');
7060 S : constant String_Id :=
7061 Strval (Expr_Value_S (Expression (Arg)));
7062 L : constant Nat := String_Length (S);
7065 procedure Skip_Spaces;
7066 -- Advance F past any spaces
7068 procedure Skip_Spaces is
7070 while F <= L and then Get_String_Char (S, F) = C loop
7076 Skip_Spaces; -- skip leading spaces
7078 -- Loop through characters, changing any embedded
7079 -- sequence of spaces to a single null character
7080 -- (this is how Link_With/Linker_Options differ)
7083 if Get_String_Char (S, F) = C then
7086 Store_String_Char (ASCII.NUL);
7089 Store_String_Char (Get_String_Char (S, F));
7097 if Present (Arg) then
7098 Store_String_Char (ASCII.NUL);
7102 Store_Linker_Option_String (End_String);
7110 -- pragma Linker_Alias (
7111 -- [Entity =>] LOCAL_NAME
7112 -- [Alias =>] static_string_EXPRESSION);
7114 when Pragma_Linker_Alias =>
7116 Check_Arg_Count (2);
7117 Check_Optional_Identifier (Arg1, Name_Entity);
7118 Check_Optional_Identifier (Arg2, "alias");
7119 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7120 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7122 -- The only processing required is to link this item on to the
7123 -- list of rep items for the given entity. This is accomplished
7124 -- by the call to Rep_Item_Too_Late (when no error is detected
7125 -- and False is returned).
7127 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7130 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7133 --------------------
7134 -- Linker_Options --
7135 --------------------
7137 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
7139 when Pragma_Linker_Options => Linker_Options : declare
7143 Check_Ada_83_Warning;
7144 Check_No_Identifiers;
7145 Check_Arg_Count (1);
7146 Check_Is_In_Decl_Part_Or_Package_Spec;
7148 if Operating_Mode = Generate_Code
7149 and then In_Extended_Main_Source_Unit (N)
7151 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7152 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
7155 while Present (Arg) loop
7156 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7157 Store_String_Char (ASCII.NUL);
7159 (Strval (Expr_Value_S (Expression (Arg))));
7163 Store_Linker_Option_String (End_String);
7167 --------------------
7168 -- Linker_Section --
7169 --------------------
7171 -- pragma Linker_Section (
7172 -- [Entity =>] LOCAL_NAME
7173 -- [Section =>] static_string_EXPRESSION);
7175 when Pragma_Linker_Section =>
7177 Check_Arg_Count (2);
7178 Check_Optional_Identifier (Arg1, Name_Entity);
7179 Check_Optional_Identifier (Arg2, Name_Section);
7180 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7181 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7183 -- The only processing required is to link this item on to the
7184 -- list of rep items for the given entity. This is accomplished
7185 -- by the call to Rep_Item_Too_Late (when no error is detected
7186 -- and False is returned).
7188 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7191 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7198 -- pragma List (On | Off)
7200 -- There is nothing to do here, since we did all the processing
7201 -- for this pragma in Par.Prag (so that it works properly even in
7202 -- syntax only mode)
7207 --------------------
7208 -- Locking_Policy --
7209 --------------------
7211 -- pragma Locking_Policy (policy_IDENTIFIER);
7213 when Pragma_Locking_Policy => declare
7217 Check_Ada_83_Warning;
7218 Check_Arg_Count (1);
7219 Check_No_Identifiers;
7220 Check_Arg_Is_Locking_Policy (Arg1);
7221 Check_Valid_Configuration_Pragma;
7222 Get_Name_String (Chars (Expression (Arg1)));
7223 LP := Fold_Upper (Name_Buffer (1));
7225 if Locking_Policy /= ' '
7226 and then Locking_Policy /= LP
7228 Error_Msg_Sloc := Locking_Policy_Sloc;
7229 Error_Pragma ("locking policy incompatible with policy#");
7231 -- Set new policy, but always preserve System_Location since
7232 -- we like the error message with the run time name.
7235 Locking_Policy := LP;
7237 if Locking_Policy_Sloc /= System_Location then
7238 Locking_Policy_Sloc := Loc;
7247 -- pragma Long_Float (D_Float | G_Float);
7249 when Pragma_Long_Float =>
7251 Check_Valid_Configuration_Pragma;
7252 Check_Arg_Count (1);
7253 Check_No_Identifier (Arg1);
7254 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
7256 if not OpenVMS_On_Target then
7257 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
7262 if Chars (Expression (Arg1)) = Name_D_Float then
7263 if Opt.Float_Format_Long = 'G' then
7264 Error_Pragma ("G_Float previously specified");
7267 Opt.Float_Format_Long := 'D';
7269 -- G_Float case (this is the default, does not need overriding)
7272 if Opt.Float_Format_Long = 'D' then
7273 Error_Pragma ("D_Float previously specified");
7276 Opt.Float_Format_Long := 'G';
7279 Set_Standard_Fpt_Formats;
7281 -----------------------
7282 -- Machine_Attribute --
7283 -----------------------
7285 -- pragma Machine_Attribute (
7286 -- [Entity =>] LOCAL_NAME,
7287 -- [Attribute_Name =>] static_string_EXPRESSION
7288 -- [,[Info =>] static_string_EXPRESSION] );
7290 when Pragma_Machine_Attribute => Machine_Attribute : declare
7296 if Arg_Count = 3 then
7297 Check_Optional_Identifier (Arg3, "info");
7298 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
7300 Check_Arg_Count (2);
7303 Check_Arg_Is_Local_Name (Arg1);
7304 Check_Optional_Identifier (Arg2, "attribute_name");
7305 Check_Optional_Identifier (Arg1, Name_Entity);
7306 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7307 Def_Id := Entity (Expression (Arg1));
7309 if Is_Access_Type (Def_Id) then
7310 Def_Id := Designated_Type (Def_Id);
7313 if Rep_Item_Too_Early (Def_Id, N) then
7317 Def_Id := Underlying_Type (Def_Id);
7319 -- The only processing required is to link this item on to the
7320 -- list of rep items for the given entity. This is accomplished
7321 -- by the call to Rep_Item_Too_Late (when no error is detected
7322 -- and False is returned).
7324 if Rep_Item_Too_Late (Def_Id, N) then
7327 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7329 end Machine_Attribute;
7335 -- pragma Main_Storage
7336 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7338 -- MAIN_STORAGE_OPTION ::=
7339 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7340 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7342 when Pragma_Main => Main : declare
7343 Args : Args_List (1 .. 3);
7344 Names : constant Name_List (1 .. 3) := (
7346 Name_Task_Stack_Size_Default,
7347 Name_Time_Slicing_Enabled);
7353 Gather_Associations (Names, Args);
7355 for J in 1 .. 2 loop
7356 if Present (Args (J)) then
7357 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7361 if Present (Args (3)) then
7362 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
7366 while Present (Nod) loop
7367 if Nkind (Nod) = N_Pragma
7368 and then Chars (Nod) = Name_Main
7370 Error_Msg_Name_1 := Chars (N);
7371 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7382 -- pragma Main_Storage
7383 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7385 -- MAIN_STORAGE_OPTION ::=
7386 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7387 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7389 when Pragma_Main_Storage => Main_Storage : declare
7390 Args : Args_List (1 .. 2);
7391 Names : constant Name_List (1 .. 2) := (
7392 Name_Working_Storage,
7399 Gather_Associations (Names, Args);
7401 for J in 1 .. 2 loop
7402 if Present (Args (J)) then
7403 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7407 Check_In_Main_Program;
7410 while Present (Nod) loop
7411 if Nkind (Nod) = N_Pragma
7412 and then Chars (Nod) = Name_Main_Storage
7414 Error_Msg_Name_1 := Chars (N);
7415 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7426 -- pragma Memory_Size (NUMERIC_LITERAL)
7428 when Pragma_Memory_Size =>
7431 -- Memory size is simply ignored
7433 Check_No_Identifiers;
7434 Check_Arg_Count (1);
7435 Check_Arg_Is_Integer_Literal (Arg1);
7441 -- pragma No_Return (procedure_LOCAL_NAME);
7443 when Pragma_No_Return => No_Return : declare
7450 Check_Arg_Count (1);
7451 Check_No_Identifiers;
7452 Check_Arg_Is_Local_Name (Arg1);
7453 Id := Expression (Arg1);
7456 if not Is_Entity_Name (Id) then
7457 Error_Pragma_Arg ("entity name required", Arg1);
7460 if Etype (Id) = Any_Type then
7468 and then Scope (E) = Current_Scope
7470 if Ekind (E) = E_Procedure
7471 or else Ekind (E) = E_Generic_Procedure
7481 Error_Pragma ("no procedures found for pragma%");
7485 ------------------------
7486 -- No_Strict_Aliasing --
7487 ------------------------
7489 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
7494 Check_At_Most_N_Arguments (1);
7496 if Arg_Count = 0 then
7497 Check_Valid_Configuration_Pragma;
7498 Opt.No_Strict_Aliasing := True;
7501 Check_Optional_Identifier (Arg2, Name_Entity);
7502 Check_Arg_Is_Local_Name (Arg1);
7503 E_Id := Entity (Expression (Arg1));
7505 if E_Id = Any_Type then
7507 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
7508 Error_Pragma_Arg ("pragma% requires access type", Arg1);
7511 Set_No_Strict_Aliasing (Base_Type (E_Id));
7513 end No_Strict_Alias;
7519 -- pragma Obsolescent [(static_string_EXPRESSION)];
7521 when Pragma_Obsolescent => Obsolescent : declare
7524 Check_At_Most_N_Arguments (1);
7525 Check_No_Identifiers;
7527 if Arg_Count = 1 then
7528 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7532 or else (Nkind (Prev (N))) /= N_Subprogram_Declaration
7535 ("pragma% misplaced, must immediately " &
7536 "follow subprogram spec");
7544 -- pragma No_Run_Time
7546 -- Note: this pragma is retained for backwards compatibiltiy.
7547 -- See body of Rtsfind for full details on its handling.
7549 when Pragma_No_Run_Time =>
7551 Check_Valid_Configuration_Pragma;
7552 Check_Arg_Count (0);
7554 No_Run_Time_Mode := True;
7555 Configurable_Run_Time_Mode := True;
7558 Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
7561 Duration_32_Bits_On_Target := True;
7565 Set_Restriction (No_Finalization, N);
7566 Set_Restriction (No_Exception_Handlers, N);
7567 Set_Restriction (Max_Tasks, N, 0);
7568 Set_Restriction (No_Tasking, N);
7570 -----------------------
7571 -- Normalize_Scalars --
7572 -----------------------
7574 -- pragma Normalize_Scalars;
7576 when Pragma_Normalize_Scalars =>
7577 Check_Ada_83_Warning;
7578 Check_Arg_Count (0);
7579 Check_Valid_Configuration_Pragma;
7580 Normalize_Scalars := True;
7581 Init_Or_Norm_Scalars := True;
7587 -- pragma Optimize (Time | Space);
7589 -- The actual check for optimize is done in Gigi. Note that this
7590 -- pragma does not actually change the optimization setting, it
7591 -- simply checks that it is consistent with the pragma.
7593 when Pragma_Optimize =>
7594 Check_No_Identifiers;
7595 Check_Arg_Count (1);
7596 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
7598 -------------------------
7599 -- Optional_Overriding --
7600 -------------------------
7602 -- These pragmas are treated as part of the previous subprogram
7603 -- declaration, and analyzed immediately after it (see sem_ch6,
7604 -- Check_Overriding_Operation). If the pragma has not been analyzed
7605 -- yet, it appears in the wrong place.
7607 when Pragma_Optional_Overriding =>
7608 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7614 when Pragma_Overriding =>
7615 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7621 -- pragma Pack (first_subtype_LOCAL_NAME);
7623 when Pragma_Pack => Pack : declare
7624 Assoc : constant Node_Id := Arg1;
7629 Check_No_Identifiers;
7630 Check_Arg_Count (1);
7631 Check_Arg_Is_Local_Name (Arg1);
7633 Type_Id := Expression (Assoc);
7634 Find_Type (Type_Id);
7635 Typ := Entity (Type_Id);
7638 or else Rep_Item_Too_Early (Typ, N)
7642 Typ := Underlying_Type (Typ);
7645 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
7646 Error_Pragma ("pragma% must specify array or record type");
7649 Check_First_Subtype (Arg1);
7651 if Has_Pragma_Pack (Typ) then
7652 Error_Pragma ("duplicate pragma%, only one allowed");
7654 -- Array type. We set the Has_Pragma_Pack flag, and Is_Packed,
7655 -- but not Has_Non_Standard_Rep, because we don't actually know
7656 -- till freeze time if the array can have packed representation.
7657 -- That's because in the general case we do not know enough about
7658 -- the component type until it in turn is frozen, which certainly
7659 -- happens before the array type is frozen, but not necessarily
7660 -- till that point (i.e. right now it may be unfrozen).
7662 elsif Is_Array_Type (Typ) then
7663 if Has_Aliased_Components (Base_Type (Typ)) then
7665 ("pragma% ignored, cannot pack aliased components?");
7667 elsif Has_Atomic_Components (Typ)
7668 or else Is_Atomic (Component_Type (Typ))
7671 ("?pragma% ignored, cannot pack atomic components");
7673 elsif not Rep_Item_Too_Late (Typ, N) then
7674 Set_Is_Packed (Base_Type (Typ));
7675 Set_Has_Pragma_Pack (Base_Type (Typ));
7676 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7679 -- Record type. For record types, the pack is always effective
7681 else pragma Assert (Is_Record_Type (Typ));
7682 if not Rep_Item_Too_Late (Typ, N) then
7683 Set_Has_Pragma_Pack (Base_Type (Typ));
7684 Set_Is_Packed (Base_Type (Typ));
7685 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7696 -- There is nothing to do here, since we did all the processing
7697 -- for this pragma in Par.Prag (so that it works properly even in
7698 -- syntax only mode)
7707 -- pragma Passive [(PASSIVE_FORM)];
7709 -- PASSIVE_FORM ::= Semaphore | No
7711 when Pragma_Passive =>
7714 if Nkind (Parent (N)) /= N_Task_Definition then
7715 Error_Pragma ("pragma% must be within task definition");
7718 if Arg_Count /= 0 then
7719 Check_Arg_Count (1);
7720 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
7727 -- pragma Polling (ON | OFF);
7729 when Pragma_Polling =>
7731 Check_Arg_Count (1);
7732 Check_No_Identifiers;
7733 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7734 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
7736 ---------------------
7737 -- Persistent_Data --
7738 ---------------------
7740 when Pragma_Persistent_Data => declare
7744 -- Register the pragma as applying to the compilation unit.
7745 -- Individual Persistent_Object pragmas for relevant objects
7746 -- are generated the end of the compilation.
7749 Check_Valid_Configuration_Pragma;
7750 Check_Arg_Count (0);
7751 Ent := Find_Lib_Unit_Name;
7752 Set_Is_Preelaborated (Ent);
7755 -----------------------
7756 -- Persistent_Object --
7757 -----------------------
7759 when Pragma_Persistent_Object => declare
7767 Check_Arg_Count (1);
7768 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7770 if not Is_Entity_Name (Expression (Arg1))
7772 (Ekind (Entity (Expression (Arg1))) /= E_Variable
7773 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
7775 Error_Pragma_Arg ("pragma only applies to objects", Arg1);
7778 Ent := Entity (Expression (Arg1));
7779 Decl := Parent (Ent);
7781 if Nkind (Decl) /= N_Object_Declaration then
7785 -- Placement of the object depends on whether there is
7786 -- an initial value or none. If the No_Initialization flag
7787 -- is set, the initialization has been transformed into
7788 -- assignments, which is disallowed elaboration code.
7790 if No_Initialization (Decl) then
7792 ("initialization for persistent object"
7793 & "must be static expression", Decl);
7797 if No (Expression (Decl)) then
7799 Store_String_Chars ("section ("".persistent.bss"")");
7803 if not Is_OK_Static_Expression (Expression (Decl)) then
7804 Flag_Non_Static_Expr
7805 ("initialization for persistent object"
7806 & "must be static expression!", Expression (Decl));
7811 Store_String_Chars ("section ("".persistent.data"")");
7818 Name_Machine_Attribute,
7820 (Make_Pragma_Argument_Association
7821 (Sloc => Sloc (Arg1),
7822 Expression => New_Occurrence_Of (Ent, Sloc (Ent))),
7823 Make_Pragma_Argument_Association
7824 (Sloc => Sloc (Arg1),
7827 (Sloc => Sloc (Arg1),
7830 Insert_After (N, MA);
7832 Set_Has_Gigi_Rep_Item (Ent);
7839 -- pragma Preelaborate [(library_unit_NAME)];
7841 -- Set the flag Is_Preelaborated of program unit name entity
7843 when Pragma_Preelaborate => Preelaborate : declare
7844 Pa : constant Node_Id := Parent (N);
7845 Pk : constant Node_Kind := Nkind (Pa);
7849 Check_Ada_83_Warning;
7850 Check_Valid_Library_Unit_Pragma;
7852 if Nkind (N) = N_Null_Statement then
7856 Ent := Find_Lib_Unit_Name;
7858 -- This filters out pragmas inside generic parent then
7859 -- show up inside instantiation
7862 and then not (Pk = N_Package_Specification
7863 and then Present (Generic_Parent (Pa)))
7865 if not Debug_Flag_U then
7866 Set_Is_Preelaborated (Ent);
7867 Set_Suppress_Elaboration_Warnings (Ent);
7876 -- pragma Priority (EXPRESSION);
7878 when Pragma_Priority => Priority : declare
7879 P : constant Node_Id := Parent (N);
7883 Check_No_Identifiers;
7884 Check_Arg_Count (1);
7888 if Nkind (P) = N_Subprogram_Body then
7889 Check_In_Main_Program;
7891 Arg := Expression (Arg1);
7892 Analyze_And_Resolve (Arg, Standard_Integer);
7896 if not Is_Static_Expression (Arg) then
7897 Flag_Non_Static_Expr
7898 ("main subprogram priority is not static!", Arg);
7901 -- If constraint error, then we already signalled an error
7903 elsif Raises_Constraint_Error (Arg) then
7906 -- Otherwise check in range
7910 Val : constant Uint := Expr_Value (Arg);
7914 or else Val > Expr_Value (Expression
7915 (Parent (RTE (RE_Max_Priority))))
7918 ("main subprogram priority is out of range", Arg1);
7924 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
7926 -- Task or Protected, must be of type Integer
7928 elsif Nkind (P) = N_Protected_Definition
7930 Nkind (P) = N_Task_Definition
7932 Arg := Expression (Arg1);
7934 -- The expression must be analyzed in the special manner
7935 -- described in "Handling of Default and Per-Object
7936 -- Expressions" in sem.ads.
7938 Analyze_Per_Use_Expression (Arg, Standard_Integer);
7940 if not Is_Static_Expression (Arg) then
7941 Check_Restriction (Static_Priorities, Arg);
7944 -- Anything else is incorrect
7950 if Has_Priority_Pragma (P) then
7951 Error_Pragma ("duplicate pragma% not allowed");
7953 Set_Has_Priority_Pragma (P, True);
7955 if Nkind (P) = N_Protected_Definition
7957 Nkind (P) = N_Task_Definition
7959 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7960 -- exp_ch9 should use this ???
7969 -- pragma Profile (profile_IDENTIFIER);
7971 -- profile_IDENTIFIER => Ravenscar
7973 when Pragma_Profile =>
7975 Check_Arg_Count (1);
7976 Check_Valid_Configuration_Pragma;
7977 Check_No_Identifiers;
7981 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
7983 if Chars (Argx) = Name_Ravenscar then
7986 Error_Pragma_Arg ("& is not a valid profile", Argx);
7990 --------------------------
7991 -- Propagate_Exceptions --
7992 --------------------------
7994 -- pragma Propagate_Exceptions;
7996 when Pragma_Propagate_Exceptions =>
7998 Check_Arg_Count (0);
8000 if In_Extended_Main_Source_Unit (N) then
8001 Propagate_Exceptions := True;
8008 -- pragma Psect_Object (
8009 -- [Internal =>] LOCAL_NAME,
8010 -- [, [External =>] EXTERNAL_SYMBOL]
8011 -- [, [Size =>] EXTERNAL_SYMBOL]);
8013 when Pragma_Psect_Object | Pragma_Common_Object =>
8014 Psect_Object : declare
8015 Args : Args_List (1 .. 3);
8016 Names : constant Name_List (1 .. 3) := (
8021 Internal : Node_Id renames Args (1);
8022 External : Node_Id renames Args (2);
8023 Size : Node_Id renames Args (3);
8025 R_Internal : Node_Id;
8026 R_External : Node_Id;
8033 procedure Check_Too_Long (Arg : Node_Id);
8034 -- Posts message if the argument is an identifier with more
8035 -- than 31 characters, or a string literal with more than
8036 -- 31 characters, and we are operating under VMS
8038 --------------------
8039 -- Check_Too_Long --
8040 --------------------
8042 procedure Check_Too_Long (Arg : Node_Id) is
8043 X : constant Node_Id := Original_Node (Arg);
8046 if Nkind (X) /= N_String_Literal
8048 Nkind (X) /= N_Identifier
8051 ("inappropriate argument for pragma %", Arg);
8054 if OpenVMS_On_Target then
8055 if (Nkind (X) = N_String_Literal
8056 and then String_Length (Strval (X)) > 31)
8058 (Nkind (X) = N_Identifier
8059 and then Length_Of_Name (Chars (X)) > 31)
8062 ("argument for pragma % is longer than 31 characters",
8068 -- Start of processing for Common_Object/Psect_Object
8072 Gather_Associations (Names, Args);
8073 Process_Extended_Import_Export_Internal_Arg (Internal);
8075 R_Internal := Relocate_Node (Internal);
8077 Def_Id := Entity (R_Internal);
8079 if Ekind (Def_Id) /= E_Constant
8080 and then Ekind (Def_Id) /= E_Variable
8083 ("pragma% must designate an object", Internal);
8086 Check_Too_Long (R_Internal);
8088 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
8090 ("cannot use pragma% for imported/exported object",
8094 if Is_Concurrent_Type (Etype (R_Internal)) then
8096 ("cannot specify pragma % for task/protected object",
8100 if Is_Psected (Def_Id) then
8101 Error_Msg_N ("?duplicate Psect_Object pragma", N);
8103 Set_Is_Psected (Def_Id);
8106 if Ekind (Def_Id) = E_Constant then
8108 ("cannot specify pragma % for a constant", R_Internal);
8111 if Is_Record_Type (Etype (R_Internal)) then
8117 Ent := First_Entity (Etype (R_Internal));
8118 while Present (Ent) loop
8119 Decl := Declaration_Node (Ent);
8121 if Ekind (Ent) = E_Component
8122 and then Nkind (Decl) = N_Component_Declaration
8123 and then Present (Expression (Decl))
8124 and then Warn_On_Export_Import
8127 ("?object for pragma % has defaults", R_Internal);
8137 if Present (Size) then
8138 Check_Too_Long (Size);
8141 -- Make Psect case-insensitive.
8143 if Present (External) then
8144 Check_Too_Long (External);
8146 if Nkind (External) = N_String_Literal then
8147 String_To_Name_Buffer (Strval (External));
8149 Get_Name_String (Chars (External));
8154 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8156 R_External := Make_String_Literal
8157 (Sloc => Sloc (External), Strval => Str);
8159 Get_Name_String (Chars (Internal));
8162 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8164 R_External := Make_String_Literal
8165 (Sloc => Sloc (Internal), Strval => Str);
8168 -- Transform into pragma Linker_Section, add attributes to
8169 -- match what DEC Ada does. Ignore size for now?
8174 Name_Linker_Section,
8176 (Make_Pragma_Argument_Association
8177 (Sloc => Sloc (R_Internal),
8178 Expression => R_Internal),
8179 Make_Pragma_Argument_Association
8180 (Sloc => Sloc (R_External),
8181 Expression => R_External))));
8185 -- Add Machine_Attribute of "overlaid", so the section overlays
8186 -- other sections of the same name.
8189 Store_String_Chars ("overlaid");
8195 Name_Machine_Attribute,
8197 (Make_Pragma_Argument_Association
8198 (Sloc => Sloc (R_Internal),
8199 Expression => R_Internal),
8200 Make_Pragma_Argument_Association
8201 (Sloc => Sloc (R_External),
8204 (Sloc => Sloc (R_External),
8208 -- Add Machine_Attribute of "global", so the section is visible
8212 Store_String_Chars ("global");
8218 Name_Machine_Attribute,
8220 (Make_Pragma_Argument_Association
8221 (Sloc => Sloc (R_Internal),
8222 Expression => R_Internal),
8224 Make_Pragma_Argument_Association
8225 (Sloc => Sloc (R_External),
8228 (Sloc => Sloc (R_External),
8232 -- Add Machine_Attribute of "initialize", so the section is
8236 Store_String_Chars ("initialize");
8242 Name_Machine_Attribute,
8244 (Make_Pragma_Argument_Association
8245 (Sloc => Sloc (R_Internal),
8246 Expression => R_Internal),
8248 Make_Pragma_Argument_Association
8249 (Sloc => Sloc (R_External),
8252 (Sloc => Sloc (R_External),
8261 -- pragma Pure [(library_unit_NAME)];
8263 when Pragma_Pure => Pure : declare
8266 Check_Ada_83_Warning;
8267 Check_Valid_Library_Unit_Pragma;
8269 if Nkind (N) = N_Null_Statement then
8273 Ent := Find_Lib_Unit_Name;
8275 Set_Suppress_Elaboration_Warnings (Ent);
8282 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
8284 when Pragma_Pure_Function => Pure_Function : declare
8288 Effective : Boolean := False;
8292 Check_Arg_Count (1);
8293 Check_Optional_Identifier (Arg1, Name_Entity);
8294 Check_Arg_Is_Local_Name (Arg1);
8295 E_Id := Expression (Arg1);
8297 if Error_Posted (E_Id) then
8301 -- Loop through homonyms (overloadings) of referenced entity
8307 Def_Id := Get_Base_Subprogram (E);
8309 if Ekind (Def_Id) /= E_Function
8310 and then Ekind (Def_Id) /= E_Generic_Function
8311 and then Ekind (Def_Id) /= E_Operator
8314 ("pragma% requires a function name", Arg1);
8317 Set_Is_Pure (Def_Id);
8319 if not Has_Pragma_Pure_Function (Def_Id) then
8320 Set_Has_Pragma_Pure_Function (Def_Id);
8325 exit when No (E) or else Scope (E) /= Current_Scope;
8329 and then Warn_On_Redundant_Constructs
8331 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
8337 --------------------
8338 -- Queuing_Policy --
8339 --------------------
8341 -- pragma Queuing_Policy (policy_IDENTIFIER);
8343 when Pragma_Queuing_Policy => declare
8347 Check_Ada_83_Warning;
8348 Check_Arg_Count (1);
8349 Check_No_Identifiers;
8350 Check_Arg_Is_Queuing_Policy (Arg1);
8351 Check_Valid_Configuration_Pragma;
8352 Get_Name_String (Chars (Expression (Arg1)));
8353 QP := Fold_Upper (Name_Buffer (1));
8355 if Queuing_Policy /= ' '
8356 and then Queuing_Policy /= QP
8358 Error_Msg_Sloc := Queuing_Policy_Sloc;
8359 Error_Pragma ("queuing policy incompatible with policy#");
8361 -- Set new policy, but always preserve System_Location since
8362 -- we like the error message with the run time name.
8365 Queuing_Policy := QP;
8367 if Queuing_Policy_Sloc /= System_Location then
8368 Queuing_Policy_Sloc := Loc;
8373 ---------------------------
8374 -- Remote_Call_Interface --
8375 ---------------------------
8377 -- pragma Remote_Call_Interface [(library_unit_NAME)];
8379 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
8380 Cunit_Node : Node_Id;
8381 Cunit_Ent : Entity_Id;
8385 Check_Ada_83_Warning;
8386 Check_Valid_Library_Unit_Pragma;
8388 if Nkind (N) = N_Null_Statement then
8392 Cunit_Node := Cunit (Current_Sem_Unit);
8393 K := Nkind (Unit (Cunit_Node));
8394 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8396 if K = N_Package_Declaration
8397 or else K = N_Generic_Package_Declaration
8398 or else K = N_Subprogram_Declaration
8399 or else K = N_Generic_Subprogram_Declaration
8400 or else (K = N_Subprogram_Body
8401 and then Acts_As_Spec (Unit (Cunit_Node)))
8406 "pragma% must apply to package or subprogram declaration");
8409 Set_Is_Remote_Call_Interface (Cunit_Ent);
8410 end Remote_Call_Interface;
8416 -- pragma Remote_Types [(library_unit_NAME)];
8418 when Pragma_Remote_Types => Remote_Types : declare
8419 Cunit_Node : Node_Id;
8420 Cunit_Ent : Entity_Id;
8423 Check_Ada_83_Warning;
8424 Check_Valid_Library_Unit_Pragma;
8426 if Nkind (N) = N_Null_Statement then
8430 Cunit_Node := Cunit (Current_Sem_Unit);
8431 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8433 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8435 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8438 "pragma% can only apply to a package declaration");
8441 Set_Is_Remote_Types (Cunit_Ent);
8448 -- pragma Ravenscar;
8450 when Pragma_Ravenscar =>
8452 Check_Arg_Count (0);
8453 Check_Valid_Configuration_Pragma;
8456 -------------------------
8457 -- Restricted_Run_Time --
8458 -------------------------
8460 -- pragma Restricted_Run_Time;
8462 when Pragma_Restricted_Run_Time =>
8464 Check_Arg_Count (0);
8465 Check_Valid_Configuration_Pragma;
8466 Set_Restricted_Profile (N);
8472 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
8475 -- restriction_IDENTIFIER
8476 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8478 when Pragma_Restrictions =>
8479 Process_Restrictions_Or_Restriction_Warnings;
8481 --------------------------
8482 -- Restriction_Warnings --
8483 --------------------------
8485 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
8488 -- restriction_IDENTIFIER
8489 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8491 when Pragma_Restriction_Warnings =>
8492 Process_Restrictions_Or_Restriction_Warnings;
8498 -- pragma Reviewable;
8500 when Pragma_Reviewable =>
8501 Check_Ada_83_Warning;
8502 Check_Arg_Count (0);
8508 -- pragma Share_Generic (NAME {, NAME});
8510 when Pragma_Share_Generic =>
8512 Process_Generic_List;
8518 -- pragma Shared (LOCAL_NAME);
8520 when Pragma_Shared =>
8522 Process_Atomic_Shared_Volatile;
8524 --------------------
8525 -- Shared_Passive --
8526 --------------------
8528 -- pragma Shared_Passive [(library_unit_NAME)];
8530 -- Set the flag Is_Shared_Passive of program unit name entity
8532 when Pragma_Shared_Passive => Shared_Passive : declare
8533 Cunit_Node : Node_Id;
8534 Cunit_Ent : Entity_Id;
8537 Check_Ada_83_Warning;
8538 Check_Valid_Library_Unit_Pragma;
8540 if Nkind (N) = N_Null_Statement then
8544 Cunit_Node := Cunit (Current_Sem_Unit);
8545 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8547 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8549 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8552 "pragma% can only apply to a package declaration");
8555 Set_Is_Shared_Passive (Cunit_Ent);
8558 ----------------------
8559 -- Source_File_Name --
8560 ----------------------
8562 -- pragma Source_File_Name (
8563 -- [UNIT_NAME =>] unit_NAME,
8564 -- [BODY_FILE_NAME | SPEC_FILE_NAME] => STRING_LITERAL);
8566 -- No processing here. Processing was completed during parsing,
8567 -- since we need to have file names set as early as possible.
8568 -- Units are loaded well before semantic processing starts.
8570 -- The only processing we defer to this point is the check
8571 -- for correct placement.
8573 when Pragma_Source_File_Name =>
8575 Check_Valid_Configuration_Pragma;
8577 ------------------------------
8578 -- Source_File_Name_Project --
8579 ------------------------------
8581 -- pragma Source_File_Name_Project (
8582 -- [UNIT_NAME =>] unit_NAME,
8583 -- [BODY_FILE_NAME | SPEC_FILE_NAME] => STRING_LITERAL);
8585 -- No processing here. Processing was completed during parsing,
8586 -- since we need to have file names set as early as possible.
8587 -- Units are loaded well before semantic processing starts.
8589 -- The only processing we defer to this point is the check
8590 -- for correct placement.
8592 when Pragma_Source_File_Name_Project =>
8594 Check_Valid_Configuration_Pragma;
8596 -- Check that a pragma Source_File_Name_Project is used only
8597 -- in a configuration pragmas file.
8598 -- Pragmas Source_File_Name_Project should only be generated
8599 -- by the Project Manager in configuration pragmas files.
8601 -- This is really an ugly test. It seems to depend on some
8602 -- accidental and undocumented property. At the very least
8603 -- it needs to be documented, but it would be better to have
8604 -- a clean way of testing if we are in a configuration file???
8606 if Present (Parent (N)) then
8608 ("pragma% can only appear in a configuration pragmas file");
8611 ----------------------
8612 -- Source_Reference --
8613 ----------------------
8615 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
8617 -- Nothing to do, all processing completed in Par.Prag, since we
8618 -- need the information for possible parser messages that are output
8620 when Pragma_Source_Reference =>
8627 -- pragma Storage_Size (EXPRESSION);
8629 when Pragma_Storage_Size => Storage_Size : declare
8630 P : constant Node_Id := Parent (N);
8634 Check_No_Identifiers;
8635 Check_Arg_Count (1);
8637 -- The expression must be analyzed in the special manner
8638 -- described in "Handling of Default Expressions" in sem.ads.
8640 -- Set In_Default_Expression for per-object case ???
8642 Arg := Expression (Arg1);
8643 Analyze_Per_Use_Expression (Arg, Any_Integer);
8645 if not Is_Static_Expression (Arg) then
8646 Check_Restriction (Static_Storage_Size, Arg);
8649 if Nkind (P) /= N_Task_Definition then
8654 if Has_Storage_Size_Pragma (P) then
8655 Error_Pragma ("duplicate pragma% not allowed");
8657 Set_Has_Storage_Size_Pragma (P, True);
8660 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8661 -- ??? exp_ch9 should use this!
8669 -- pragma Storage_Unit (NUMERIC_LITERAL);
8671 -- Only permitted argument is System'Storage_Unit value
8673 when Pragma_Storage_Unit =>
8674 Check_No_Identifiers;
8675 Check_Arg_Count (1);
8676 Check_Arg_Is_Integer_Literal (Arg1);
8678 if Intval (Expression (Arg1)) /=
8679 UI_From_Int (Ttypes.System_Storage_Unit)
8681 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
8683 ("the only allowed argument for pragma% is ^", Arg1);
8686 --------------------
8687 -- Stream_Convert --
8688 --------------------
8690 -- pragma Stream_Convert (
8691 -- [Entity =>] type_LOCAL_NAME,
8692 -- [Read =>] function_NAME,
8693 -- [Write =>] function NAME);
8695 when Pragma_Stream_Convert => Stream_Convert : declare
8697 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
8698 -- Check that the given argument is the name of a local
8699 -- function of one argument that is not overloaded earlier
8700 -- in the current local scope. A check is also made that the
8701 -- argument is a function with one parameter.
8703 --------------------------------------
8704 -- Check_OK_Stream_Convert_Function --
8705 --------------------------------------
8707 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
8711 Check_Arg_Is_Local_Name (Arg);
8712 Ent := Entity (Expression (Arg));
8714 if Has_Homonym (Ent) then
8716 ("argument for pragma% may not be overloaded", Arg);
8719 if Ekind (Ent) /= E_Function
8720 or else No (First_Formal (Ent))
8721 or else Present (Next_Formal (First_Formal (Ent)))
8724 ("argument for pragma% must be" &
8725 " function of one argument", Arg);
8727 end Check_OK_Stream_Convert_Function;
8729 -- Start of procecessing for Stream_Convert
8733 Check_Arg_Count (3);
8734 Check_Optional_Identifier (Arg1, Name_Entity);
8735 Check_Optional_Identifier (Arg2, Name_Read);
8736 Check_Optional_Identifier (Arg3, Name_Write);
8737 Check_Arg_Is_Local_Name (Arg1);
8738 Check_OK_Stream_Convert_Function (Arg2);
8739 Check_OK_Stream_Convert_Function (Arg3);
8742 Typ : constant Entity_Id :=
8743 Underlying_Type (Entity (Expression (Arg1)));
8744 Read : constant Entity_Id := Entity (Expression (Arg2));
8745 Write : constant Entity_Id := Entity (Expression (Arg3));
8748 if Etype (Typ) = Any_Type
8750 Etype (Read) = Any_Type
8752 Etype (Write) = Any_Type
8757 Check_First_Subtype (Arg1);
8759 if Rep_Item_Too_Early (Typ, N)
8761 Rep_Item_Too_Late (Typ, N)
8766 if Underlying_Type (Etype (Read)) /= Typ then
8768 ("incorrect return type for function&", Arg2);
8771 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
8773 ("incorrect parameter type for function&", Arg3);
8776 if Underlying_Type (Etype (First_Formal (Read))) /=
8777 Underlying_Type (Etype (Write))
8780 ("result type of & does not match Read parameter type",
8786 -------------------------
8787 -- Style_Checks (GNAT) --
8788 -------------------------
8790 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
8792 -- This is processed by the parser since some of the style
8793 -- checks take place during source scanning and parsing. This
8794 -- means that we don't need to issue error messages here.
8796 when Pragma_Style_Checks => Style_Checks : declare
8797 A : constant Node_Id := Expression (Arg1);
8803 Check_No_Identifiers;
8805 -- Two argument form
8807 if Arg_Count = 2 then
8808 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
8815 E_Id := Expression (Arg2);
8818 if not Is_Entity_Name (E_Id) then
8820 ("second argument of pragma% must be entity name",
8830 Set_Suppress_Style_Checks (E,
8831 (Chars (Expression (Arg1)) = Name_Off));
8832 exit when No (Homonym (E));
8838 -- One argument form
8841 Check_Arg_Count (1);
8843 if Nkind (A) = N_String_Literal then
8847 Slen : constant Natural := Natural (String_Length (S));
8848 Options : String (1 .. Slen);
8854 C := Get_String_Char (S, Int (J));
8855 exit when not In_Character_Range (C);
8856 Options (J) := Get_Character (C);
8859 Set_Style_Check_Options (Options);
8867 elsif Nkind (A) = N_Identifier then
8869 if Chars (A) = Name_All_Checks then
8870 Set_Default_Style_Check_Options;
8872 elsif Chars (A) = Name_On then
8873 Style_Check := True;
8875 elsif Chars (A) = Name_Off then
8876 Style_Check := False;
8887 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
8889 when Pragma_Subtitle =>
8891 Check_Arg_Count (1);
8892 Check_Optional_Identifier (Arg1, Name_Subtitle);
8893 Check_Arg_Is_String_Literal (Arg1);
8899 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
8901 when Pragma_Suppress =>
8902 Process_Suppress_Unsuppress (True);
8908 -- pragma Suppress_All;
8910 -- The only check made here is that the pragma appears in the
8911 -- proper place, i.e. following a compilation unit. If indeed
8912 -- it appears in this context, then the parser has already
8913 -- inserted an equivalent pragma Suppress (All_Checks) to get
8914 -- the required effect.
8916 when Pragma_Suppress_All =>
8918 Check_Arg_Count (0);
8920 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
8921 or else not Is_List_Member (N)
8922 or else List_Containing (N) /= Pragmas_After (Parent (N))
8925 ("misplaced pragma%, must follow compilation unit");
8928 -------------------------
8929 -- Suppress_Debug_Info --
8930 -------------------------
8932 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
8934 when Pragma_Suppress_Debug_Info =>
8936 Check_Arg_Count (1);
8937 Check_Arg_Is_Local_Name (Arg1);
8938 Check_Optional_Identifier (Arg1, Name_Entity);
8939 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
8941 ----------------------------------
8942 -- Suppress_Exception_Locations --
8943 ----------------------------------
8945 -- pragma Suppress_Exception_Locations;
8947 when Pragma_Suppress_Exception_Locations =>
8949 Check_Arg_Count (0);
8950 Check_Valid_Configuration_Pragma;
8951 Exception_Locations_Suppressed := True;
8953 -----------------------------
8954 -- Suppress_Initialization --
8955 -----------------------------
8957 -- pragma Suppress_Initialization ([Entity =>] type_Name);
8959 when Pragma_Suppress_Initialization => Suppress_Init : declare
8965 Check_Arg_Count (1);
8966 Check_Optional_Identifier (Arg1, Name_Entity);
8967 Check_Arg_Is_Local_Name (Arg1);
8969 E_Id := Expression (Arg1);
8971 if Etype (E_Id) = Any_Type then
8978 if Is_Incomplete_Or_Private_Type (E) then
8979 if No (Full_View (Base_Type (E))) then
8981 ("argument of pragma% cannot be an incomplete type",
8984 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
8987 Set_Suppress_Init_Proc (Base_Type (E));
8992 ("pragma% requires argument that is a type name", Arg1);
9000 -- pragma System_Name (DIRECT_NAME);
9002 -- Syntax check: one argument, which must be the identifier GNAT
9003 -- or the identifier GCC, no other identifiers are acceptable.
9005 when Pragma_System_Name =>
9006 Check_No_Identifiers;
9007 Check_Arg_Count (1);
9008 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
9010 -----------------------------
9011 -- Task_Dispatching_Policy --
9012 -----------------------------
9014 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
9016 when Pragma_Task_Dispatching_Policy => declare
9020 Check_Ada_83_Warning;
9021 Check_Arg_Count (1);
9022 Check_No_Identifiers;
9023 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9024 Check_Valid_Configuration_Pragma;
9025 Get_Name_String (Chars (Expression (Arg1)));
9026 DP := Fold_Upper (Name_Buffer (1));
9028 if Task_Dispatching_Policy /= ' '
9029 and then Task_Dispatching_Policy /= DP
9031 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9033 ("task dispatching policy incompatible with policy#");
9035 -- Set new policy, but always preserve System_Location since
9036 -- we like the error message with the run time name.
9039 Task_Dispatching_Policy := DP;
9041 if Task_Dispatching_Policy_Sloc /= System_Location then
9042 Task_Dispatching_Policy_Sloc := Loc;
9051 -- pragma Task_Info (EXPRESSION);
9053 when Pragma_Task_Info => Task_Info : declare
9054 P : constant Node_Id := Parent (N);
9059 if Nkind (P) /= N_Task_Definition then
9060 Error_Pragma ("pragma% must appear in task definition");
9063 Check_No_Identifiers;
9064 Check_Arg_Count (1);
9066 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
9068 if Etype (Expression (Arg1)) = Any_Type then
9072 if Has_Task_Info_Pragma (P) then
9073 Error_Pragma ("duplicate pragma% not allowed");
9075 Set_Has_Task_Info_Pragma (P, True);
9083 -- pragma Task_Name (string_EXPRESSION);
9085 when Pragma_Task_Name => Task_Name : declare
9086 -- pragma Priority (EXPRESSION);
9088 P : constant Node_Id := Parent (N);
9092 Check_No_Identifiers;
9093 Check_Arg_Count (1);
9095 Arg := Expression (Arg1);
9096 Analyze_And_Resolve (Arg, Standard_String);
9098 if Nkind (P) /= N_Task_Definition then
9102 if Has_Task_Name_Pragma (P) then
9103 Error_Pragma ("duplicate pragma% not allowed");
9105 Set_Has_Task_Name_Pragma (P, True);
9106 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9114 -- pragma Task_Storage (
9115 -- [Task_Type =>] LOCAL_NAME,
9116 -- [Top_Guard =>] static_integer_EXPRESSION);
9118 when Pragma_Task_Storage => Task_Storage : declare
9119 Args : Args_List (1 .. 2);
9120 Names : constant Name_List (1 .. 2) := (
9124 Task_Type : Node_Id renames Args (1);
9125 Top_Guard : Node_Id renames Args (2);
9131 Gather_Associations (Names, Args);
9133 if No (Task_Type) then
9135 ("missing task_type argument for pragma%");
9138 Check_Arg_Is_Local_Name (Task_Type);
9140 Ent := Entity (Task_Type);
9142 if not Is_Task_Type (Ent) then
9144 ("argument for pragma% must be task type", Task_Type);
9147 if No (Top_Guard) then
9149 ("pragma% takes two arguments", Task_Type);
9151 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
9154 Check_First_Subtype (Task_Type);
9156 if Rep_Item_Too_Late (Ent, N) then
9165 -- pragma Thread_Body
9166 -- ( [Entity =>] LOCAL_NAME
9167 -- [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);
9169 when Pragma_Thread_Body => Thread_Body : declare
9176 Check_At_Least_N_Arguments (1);
9177 Check_At_Most_N_Arguments (2);
9178 Check_Optional_Identifier (Arg1, Name_Entity);
9179 Check_Arg_Is_Local_Name (Arg1);
9181 Id := Expression (Arg1);
9183 if not Is_Entity_Name (Id)
9184 or else not Is_Subprogram (Entity (Id))
9186 Error_Pragma_Arg ("subprogram name required", Arg1);
9191 -- Go to renamed subprogram if present, since Thread_Body applies
9192 -- to the actual renamed entity, not to the renaming entity.
9194 if Present (Alias (E))
9195 and then Nkind (Parent (Declaration_Node (E))) =
9196 N_Subprogram_Renaming_Declaration
9201 -- Various error checks
9203 if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
9205 ("pragma% requires separate spec and must come before body");
9207 elsif Rep_Item_Too_Early (E, N)
9209 Rep_Item_Too_Late (E, N)
9213 elsif Is_Thread_Body (E) then
9215 ("only one thread body pragma allowed", Arg1);
9217 elsif Present (Homonym (E))
9218 and then Scope (Homonym (E)) = Current_Scope
9221 ("thread body subprogram must not be overloaded", Arg1);
9224 Set_Is_Thread_Body (E);
9226 -- Deal with secondary stack argument
9228 if Arg_Count = 2 then
9229 Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
9230 SS := Expression (Arg2);
9231 Analyze_And_Resolve (SS, Any_Integer);
9239 -- pragma Time_Slice (static_duration_EXPRESSION);
9241 when Pragma_Time_Slice => Time_Slice : declare
9247 Check_Arg_Count (1);
9248 Check_No_Identifiers;
9249 Check_In_Main_Program;
9250 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
9252 if not Error_Posted (Arg1) then
9254 while Present (Nod) loop
9255 if Nkind (Nod) = N_Pragma
9256 and then Chars (Nod) = Name_Time_Slice
9258 Error_Msg_Name_1 := Chars (N);
9259 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9266 -- Process only if in main unit
9268 if Get_Source_Unit (Loc) = Main_Unit then
9269 Opt.Time_Slice_Set := True;
9270 Val := Expr_Value_R (Expression (Arg1));
9272 if Val <= Ureal_0 then
9273 Opt.Time_Slice_Value := 0;
9275 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
9276 Opt.Time_Slice_Value := 1_000_000_000;
9279 Opt.Time_Slice_Value :=
9280 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
9289 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
9291 -- TITLING_OPTION ::=
9292 -- [Title =>] STRING_LITERAL
9293 -- | [Subtitle =>] STRING_LITERAL
9295 when Pragma_Title => Title : declare
9296 Args : Args_List (1 .. 2);
9297 Names : constant Name_List (1 .. 2) := (
9303 Gather_Associations (Names, Args);
9305 for J in 1 .. 2 loop
9306 if Present (Args (J)) then
9307 Check_Arg_Is_String_Literal (Args (J));
9312 ---------------------
9313 -- Unchecked_Union --
9314 ---------------------
9316 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
9318 when Pragma_Unchecked_Union => Unchecked_Union : declare
9319 Assoc : constant Node_Id := Arg1;
9320 Type_Id : constant Node_Id := Expression (Assoc);
9331 Check_No_Identifiers;
9332 Check_Arg_Count (1);
9333 Check_Arg_Is_Local_Name (Arg1);
9335 Find_Type (Type_Id);
9336 Typ := Entity (Type_Id);
9339 or else Rep_Item_Too_Early (Typ, N)
9343 Typ := Underlying_Type (Typ);
9346 if Rep_Item_Too_Late (Typ, N) then
9350 Check_First_Subtype (Arg1);
9352 -- Note remaining cases are references to a type in the current
9353 -- declarative part. If we find an error, we post the error on
9354 -- the relevant type declaration at an appropriate point.
9356 if not Is_Record_Type (Typ) then
9357 Error_Msg_N ("Unchecked_Union must be record type", Typ);
9360 elsif Is_Tagged_Type (Typ) then
9361 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
9364 elsif Is_Limited_Type (Typ) then
9366 ("Unchecked_Union must not be limited record type", Typ);
9367 Explain_Limited_Type (Typ, Typ);
9371 if not Has_Discriminants (Typ) then
9373 ("Unchecked_Union must have one discriminant", Typ);
9377 Discr := First_Discriminant (Typ);
9379 if Present (Next_Discriminant (Discr)) then
9381 ("Unchecked_Union must have exactly one discriminant",
9382 Next_Discriminant (Discr));
9386 if No (Discriminant_Default_Value (Discr)) then
9388 ("Unchecked_Union discriminant must have default value",
9392 Tdef := Type_Definition (Declaration_Node (Typ));
9393 Clist := Component_List (Tdef);
9395 if No (Clist) or else No (Variant_Part (Clist)) then
9397 ("Unchecked_Union must have variant part",
9402 Vpart := Variant_Part (Clist);
9404 if Is_Non_Empty_List (Component_Items (Clist)) then
9406 ("components before variant not allowed " &
9407 "in Unchecked_Union",
9408 First (Component_Items (Clist)));
9411 Variant := First (Variants (Vpart));
9412 while Present (Variant) loop
9413 Clist := Component_List (Variant);
9415 if Present (Variant_Part (Clist)) then
9417 ("Unchecked_Union may not have nested variants",
9418 Variant_Part (Clist));
9421 if not Is_Non_Empty_List (Component_Items (Clist)) then
9423 ("Unchecked_Union may not have empty component list",
9428 Comp := First (Component_Items (Clist));
9430 if Nkind (Comp) = N_Component_Declaration then
9432 if Present (Expression (Comp)) then
9434 ("default initialization not allowed " &
9435 "in Unchecked_Union",
9440 Sindic : constant Node_Id :=
9441 Subtype_Indication (Component_Definition (Comp));
9444 if Nkind (Sindic) = N_Subtype_Indication then
9445 Check_Static_Constraint (Constraint (Sindic));
9450 if Present (Next (Comp)) then
9452 ("Unchecked_Union variant can have only one component",
9460 Set_Is_Unchecked_Union (Typ, True);
9461 Set_Convention (Typ, Convention_C);
9463 Set_Has_Unchecked_Union (Base_Type (Typ), True);
9464 Set_Is_Unchecked_Union (Base_Type (Typ), True);
9465 end Unchecked_Union;
9467 ------------------------
9468 -- Unimplemented_Unit --
9469 ------------------------
9471 -- pragma Unimplemented_Unit;
9473 -- Note: this only gives an error if we are generating code,
9474 -- or if we are in a generic library unit (where the pragma
9475 -- appears in the body, not in the spec).
9477 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
9478 Cunitent : constant Entity_Id :=
9479 Cunit_Entity (Get_Source_Unit (Loc));
9480 Ent_Kind : constant Entity_Kind :=
9485 Check_Arg_Count (0);
9487 if Operating_Mode = Generate_Code
9488 or else Ent_Kind = E_Generic_Function
9489 or else Ent_Kind = E_Generic_Procedure
9490 or else Ent_Kind = E_Generic_Package
9492 Get_Name_String (Chars (Cunitent));
9493 Set_Casing (Mixed_Case);
9494 Write_Str (Name_Buffer (1 .. Name_Len));
9495 Write_Str (" is not implemented");
9497 raise Unrecoverable_Error;
9499 end Unimplemented_Unit;
9501 --------------------
9502 -- Universal_Data --
9503 --------------------
9505 -- pragma Universal_Data [(library_unit_NAME)];
9507 when Pragma_Universal_Data =>
9510 -- If this is a configuration pragma, then set the universal
9511 -- addressing option, otherwise confirm that the pragma
9512 -- satisfies the requirements of library unit pragma placement
9513 -- and leave it to the GNAAMP back end to detect the pragma
9514 -- (avoids transitive setting of the option due to withed units).
9516 if Is_Configuration_Pragma then
9517 Universal_Addressing_On_AAMP := True;
9519 Check_Valid_Library_Unit_Pragma;
9522 if not AAMP_On_Target then
9523 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
9530 -- pragma Unreferenced (local_Name {, local_Name});
9532 when Pragma_Unreferenced => Unreferenced : declare
9535 Arg_Ent : Entity_Id;
9539 Check_At_Least_N_Arguments (1);
9543 while Present (Arg_Node) loop
9544 Check_No_Identifier (Arg_Node);
9546 -- Note that the analyze call done by Check_Arg_Is_Local_Name
9547 -- will in fact generate a reference, so that the entity will
9548 -- have a reference, which will inhibit any warnings about it
9549 -- not being referenced, and also properly show up in the ali
9550 -- file as a reference. But this reference is recorded before
9551 -- the Has_Pragma_Unreferenced flag is set, so that no warning
9552 -- is generated for this reference.
9554 Check_Arg_Is_Local_Name (Arg_Node);
9555 Arg_Expr := Get_Pragma_Arg (Arg_Node);
9557 if Is_Entity_Name (Arg_Expr) then
9558 Arg_Ent := Entity (Arg_Expr);
9560 -- If the entity is overloaded, the pragma applies to the
9561 -- most recent overloading, as documented. In this case,
9562 -- name resolution does not generate a reference, so it
9563 -- must be done here explicitly.
9565 if Is_Overloaded (Arg_Expr) then
9566 Generate_Reference (Arg_Ent, N);
9569 Set_Has_Pragma_Unreferenced (Arg_Ent);
9576 ------------------------------
9577 -- Unreserve_All_Interrupts --
9578 ------------------------------
9580 -- pragma Unreserve_All_Interrupts;
9582 when Pragma_Unreserve_All_Interrupts =>
9584 Check_Arg_Count (0);
9586 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
9587 Unreserve_All_Interrupts := True;
9594 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
9596 when Pragma_Unsuppress =>
9598 Process_Suppress_Unsuppress (False);
9604 -- pragma Use_VADS_Size;
9606 when Pragma_Use_VADS_Size =>
9608 Check_Arg_Count (0);
9609 Check_Valid_Configuration_Pragma;
9610 Use_VADS_Size := True;
9612 ---------------------
9613 -- Validity_Checks --
9614 ---------------------
9616 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
9618 when Pragma_Validity_Checks => Validity_Checks : declare
9619 A : constant Node_Id := Expression (Arg1);
9625 Check_Arg_Count (1);
9626 Check_No_Identifiers;
9628 if Nkind (A) = N_String_Literal then
9632 Slen : constant Natural := Natural (String_Length (S));
9633 Options : String (1 .. Slen);
9639 C := Get_String_Char (S, Int (J));
9640 exit when not In_Character_Range (C);
9641 Options (J) := Get_Character (C);
9644 Set_Validity_Check_Options (Options);
9652 elsif Nkind (A) = N_Identifier then
9654 if Chars (A) = Name_All_Checks then
9655 Set_Validity_Check_Options ("a");
9657 elsif Chars (A) = Name_On then
9658 Validity_Checks_On := True;
9660 elsif Chars (A) = Name_Off then
9661 Validity_Checks_On := False;
9665 end Validity_Checks;
9671 -- pragma Volatile (LOCAL_NAME);
9673 when Pragma_Volatile =>
9674 Process_Atomic_Shared_Volatile;
9676 -------------------------
9677 -- Volatile_Components --
9678 -------------------------
9680 -- pragma Volatile_Components (array_LOCAL_NAME);
9682 -- Volatile is handled by the same circuit as Atomic_Components
9688 -- pragma Warnings (On | Off, [LOCAL_NAME])
9690 when Pragma_Warnings => Warnings : begin
9692 Check_At_Least_N_Arguments (1);
9693 Check_At_Most_N_Arguments (2);
9694 Check_No_Identifiers;
9696 -- One argument case was processed by parser in Par.Prag
9698 if Arg_Count /= 1 then
9699 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9700 Check_Arg_Count (2);
9707 E_Id := Expression (Arg2);
9710 -- In the expansion of an inlined body, a reference to
9711 -- the formal may be wrapped in a conversion if the actual
9712 -- is a conversion. Retrieve the real entity name.
9714 if (In_Instance_Body
9715 or else In_Inlined_Body)
9716 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
9718 E_Id := Expression (E_Id);
9721 if not Is_Entity_Name (E_Id) then
9723 ("second argument of pragma% must be entity name",
9733 Set_Warnings_Off (E,
9734 (Chars (Expression (Arg1)) = Name_Off));
9736 if Is_Enumeration_Type (E) then
9738 Lit : Entity_Id := First_Literal (E);
9741 while Present (Lit) loop
9742 Set_Warnings_Off (Lit);
9748 exit when No (Homonym (E));
9760 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
9762 when Pragma_Weak_External => Weak_External : declare
9767 Check_Arg_Count (1);
9768 Check_Optional_Identifier (Arg1, Name_Entity);
9769 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9770 Ent := Entity (Expression (Arg1));
9772 if Rep_Item_Too_Early (Ent, N) then
9775 Ent := Underlying_Type (Ent);
9778 -- The only processing required is to link this item on to the
9779 -- list of rep items for the given entity. This is accomplished
9780 -- by the call to Rep_Item_Too_Late (when no error is detected
9781 -- and False is returned).
9783 if Rep_Item_Too_Late (Ent, N) then
9786 Set_Has_Gigi_Rep_Item (Ent);
9790 --------------------
9791 -- Unknown_Pragma --
9792 --------------------
9794 -- Should be impossible, since the case of an unknown pragma is
9795 -- separately processed before the case statement is entered.
9797 when Unknown_Pragma =>
9798 raise Program_Error;
9803 when Pragma_Exit => null;
9806 ---------------------------------
9807 -- Delay_Config_Pragma_Analyze --
9808 ---------------------------------
9810 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
9812 return Chars (N) = Name_Interrupt_State;
9813 end Delay_Config_Pragma_Analyze;
9815 -------------------------
9816 -- Get_Base_Subprogram --
9817 -------------------------
9819 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
9825 -- Follow subprogram renaming chain
9827 while Is_Subprogram (Result)
9829 (Is_Generic_Instance (Result)
9830 or else Nkind (Parent (Declaration_Node (Result))) =
9831 N_Subprogram_Renaming_Declaration)
9832 and then Present (Alias (Result))
9834 Result := Alias (Result);
9838 end Get_Base_Subprogram;
9840 -----------------------------------------
9841 -- Is_Non_Significant_Pragma_Reference --
9842 -----------------------------------------
9844 -- This function makes use of the following static table which indicates
9845 -- whether a given pragma is significant. A value of -1 in this table
9846 -- indicates that the reference is significant. A value of zero indicates
9847 -- than appearence as any argument is insignificant, a positive value
9848 -- indicates that appearence in that parameter position is significant.
9850 Sig_Flags : constant array (Pragma_Id) of Int :=
9851 (Pragma_AST_Entry => -1,
9852 Pragma_Abort_Defer => -1,
9853 Pragma_Ada_83 => -1,
9854 Pragma_Ada_95 => -1,
9855 Pragma_All_Calls_Remote => -1,
9856 Pragma_Annotate => -1,
9857 Pragma_Assert => -1,
9858 Pragma_Asynchronous => -1,
9860 Pragma_Atomic_Components => 0,
9861 Pragma_Attach_Handler => -1,
9862 Pragma_CPP_Class => 0,
9863 Pragma_CPP_Constructor => 0,
9864 Pragma_CPP_Virtual => 0,
9865 Pragma_CPP_Vtable => 0,
9866 Pragma_C_Pass_By_Copy => 0,
9867 Pragma_Comment => 0,
9868 Pragma_Common_Object => -1,
9869 Pragma_Compile_Time_Warning => -1,
9870 Pragma_Complex_Representation => 0,
9871 Pragma_Component_Alignment => -1,
9872 Pragma_Controlled => 0,
9873 Pragma_Convention => 0,
9874 Pragma_Convention_Identifier => 0,
9876 Pragma_Discard_Names => 0,
9877 Pragma_Elaborate => -1,
9878 Pragma_Elaborate_All => -1,
9879 Pragma_Elaborate_Body => -1,
9880 Pragma_Elaboration_Checks => -1,
9881 Pragma_Eliminate => -1,
9882 Pragma_Explicit_Overriding => -1,
9883 Pragma_Export => -1,
9884 Pragma_Export_Exception => -1,
9885 Pragma_Export_Function => -1,
9886 Pragma_Export_Object => -1,
9887 Pragma_Export_Procedure => -1,
9888 Pragma_Export_Value => -1,
9889 Pragma_Export_Valued_Procedure => -1,
9890 Pragma_Extend_System => -1,
9891 Pragma_Extensions_Allowed => -1,
9892 Pragma_External => -1,
9893 Pragma_External_Name_Casing => -1,
9894 Pragma_Finalize_Storage_Only => 0,
9895 Pragma_Float_Representation => 0,
9897 Pragma_Import => +2,
9898 Pragma_Import_Exception => 0,
9899 Pragma_Import_Function => 0,
9900 Pragma_Import_Object => 0,
9901 Pragma_Import_Procedure => 0,
9902 Pragma_Import_Valued_Procedure => 0,
9903 Pragma_Initialize_Scalars => -1,
9905 Pragma_Inline_Always => 0,
9906 Pragma_Inline_Generic => 0,
9907 Pragma_Inspection_Point => -1,
9908 Pragma_Interface => +2,
9909 Pragma_Interface_Name => +2,
9910 Pragma_Interrupt_Handler => -1,
9911 Pragma_Interrupt_Priority => -1,
9912 Pragma_Interrupt_State => -1,
9913 Pragma_Java_Constructor => -1,
9914 Pragma_Java_Interface => -1,
9915 Pragma_Keep_Names => 0,
9916 Pragma_License => -1,
9917 Pragma_Link_With => -1,
9918 Pragma_Linker_Alias => -1,
9919 Pragma_Linker_Options => -1,
9920 Pragma_Linker_Section => -1,
9922 Pragma_Locking_Policy => -1,
9923 Pragma_Long_Float => -1,
9924 Pragma_Machine_Attribute => -1,
9926 Pragma_Main_Storage => -1,
9927 Pragma_Memory_Size => -1,
9928 Pragma_No_Return => 0,
9929 Pragma_No_Run_Time => -1,
9930 Pragma_No_Strict_Aliasing => -1,
9931 Pragma_Normalize_Scalars => -1,
9932 Pragma_Obsolescent => 0,
9933 Pragma_Optimize => -1,
9934 Pragma_Optional_Overriding => -1,
9935 Pragma_Overriding => -1,
9938 Pragma_Passive => -1,
9939 Pragma_Polling => -1,
9940 Pragma_Persistent_Data => -1,
9941 Pragma_Persistent_Object => -1,
9942 Pragma_Preelaborate => -1,
9943 Pragma_Priority => -1,
9944 Pragma_Profile => 0,
9945 Pragma_Propagate_Exceptions => -1,
9946 Pragma_Psect_Object => -1,
9948 Pragma_Pure_Function => 0,
9949 Pragma_Queuing_Policy => -1,
9950 Pragma_Ravenscar => -1,
9951 Pragma_Remote_Call_Interface => -1,
9952 Pragma_Remote_Types => -1,
9953 Pragma_Restricted_Run_Time => -1,
9954 Pragma_Restriction_Warnings => -1,
9955 Pragma_Restrictions => -1,
9956 Pragma_Reviewable => -1,
9957 Pragma_Share_Generic => -1,
9958 Pragma_Shared => -1,
9959 Pragma_Shared_Passive => -1,
9960 Pragma_Source_File_Name => -1,
9961 Pragma_Source_File_Name_Project => -1,
9962 Pragma_Source_Reference => -1,
9963 Pragma_Storage_Size => -1,
9964 Pragma_Storage_Unit => -1,
9965 Pragma_Stream_Convert => -1,
9966 Pragma_Style_Checks => -1,
9967 Pragma_Subtitle => -1,
9968 Pragma_Suppress => 0,
9969 Pragma_Suppress_Exception_Locations => 0,
9970 Pragma_Suppress_All => -1,
9971 Pragma_Suppress_Debug_Info => 0,
9972 Pragma_Suppress_Initialization => 0,
9973 Pragma_System_Name => -1,
9974 Pragma_Task_Dispatching_Policy => -1,
9975 Pragma_Task_Info => -1,
9976 Pragma_Task_Name => -1,
9977 Pragma_Task_Storage => 0,
9978 Pragma_Thread_Body => +2,
9979 Pragma_Time_Slice => -1,
9981 Pragma_Unchecked_Union => -1,
9982 Pragma_Unimplemented_Unit => -1,
9983 Pragma_Universal_Data => -1,
9984 Pragma_Unreferenced => -1,
9985 Pragma_Unreserve_All_Interrupts => -1,
9986 Pragma_Unsuppress => 0,
9987 Pragma_Use_VADS_Size => -1,
9988 Pragma_Validity_Checks => -1,
9989 Pragma_Volatile => 0,
9990 Pragma_Volatile_Components => 0,
9991 Pragma_Warnings => -1,
9992 Pragma_Weak_External => 0,
9993 Unknown_Pragma => 0);
9995 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
10003 if Nkind (P) /= N_Pragma_Argument_Association then
10007 C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
10017 A := First (Pragma_Argument_Associations (Parent (P)));
10018 for J in 1 .. C - 1 loop
10029 end Is_Non_Significant_Pragma_Reference;
10031 ------------------------------
10032 -- Is_Pragma_String_Literal --
10033 ------------------------------
10035 -- This function returns true if the corresponding pragma argument is
10036 -- a static string expression. These are the only cases in which string
10037 -- literals can appear as pragma arguments. We also allow a string
10038 -- literal as the first argument to pragma Assert (although it will
10039 -- of course always generate a type error).
10041 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
10042 Pragn : constant Node_Id := Parent (Par);
10043 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
10044 Pname : constant Name_Id := Chars (Pragn);
10050 N := First (Assoc);
10057 if Pname = Name_Assert then
10060 elsif Pname = Name_Export then
10063 elsif Pname = Name_Ident then
10066 elsif Pname = Name_Import then
10069 elsif Pname = Name_Interface_Name then
10072 elsif Pname = Name_Linker_Alias then
10075 elsif Pname = Name_Linker_Section then
10078 elsif Pname = Name_Machine_Attribute then
10081 elsif Pname = Name_Source_File_Name then
10084 elsif Pname = Name_Source_Reference then
10087 elsif Pname = Name_Title then
10090 elsif Pname = Name_Subtitle then
10096 end Is_Pragma_String_Literal;
10098 --------------------------------------
10099 -- Process_Compilation_Unit_Pragmas --
10100 --------------------------------------
10102 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
10104 -- A special check for pragma Suppress_All. This is a strange DEC
10105 -- pragma, strange because it comes at the end of the unit. If we
10106 -- have a pragma Suppress_All in the Pragmas_After of the current
10107 -- unit, then we insert a pragma Suppress (All_Checks) at the start
10108 -- of the context clause to ensure the correct processing.
10111 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
10115 if Present (PA) then
10117 while Present (P) loop
10118 if Chars (P) = Name_Suppress_All then
10119 Prepend_To (Context_Items (N),
10120 Make_Pragma (Sloc (P),
10121 Chars => Name_Suppress,
10122 Pragma_Argument_Associations => New_List (
10123 Make_Pragma_Argument_Association (Sloc (P),
10125 Make_Identifier (Sloc (P),
10126 Chars => Name_All_Checks)))));
10134 end Process_Compilation_Unit_Pragmas;
10136 --------------------------------
10137 -- Set_Encoded_Interface_Name --
10138 --------------------------------
10140 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
10141 Str : constant String_Id := Strval (S);
10142 Len : constant Int := String_Length (Str);
10147 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
10150 -- Stores encoded value of character code CC. The encoding we
10151 -- use an underscore followed by four lower case hex digits.
10153 procedure Encode is
10155 Store_String_Char (Get_Char_Code ('_'));
10157 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
10159 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
10161 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
10163 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
10166 -- Start of processing for Set_Encoded_Interface_Name
10169 -- If first character is asterisk, this is a link name, and we
10170 -- leave it completely unmodified. We also ignore null strings
10171 -- (the latter case happens only in error cases) and no encoding
10172 -- should occur for Java interface names.
10175 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
10178 Set_Interface_Name (E, S);
10183 CC := Get_String_Char (Str, J);
10185 exit when not In_Character_Range (CC);
10187 C := Get_Character (CC);
10189 exit when C /= '_' and then C /= '$'
10190 and then C not in '0' .. '9'
10191 and then C not in 'a' .. 'z'
10192 and then C not in 'A' .. 'Z';
10195 Set_Interface_Name (E, S);
10203 -- Here we need to encode. The encoding we use as follows:
10204 -- three underscores + four hex digits (lower case)
10208 for J in 1 .. String_Length (Str) loop
10209 CC := Get_String_Char (Str, J);
10211 if not In_Character_Range (CC) then
10214 C := Get_Character (CC);
10216 if C = '_' or else C = '$'
10217 or else C in '0' .. '9'
10218 or else C in 'a' .. 'z'
10219 or else C in 'A' .. 'Z'
10221 Store_String_Char (CC);
10228 Set_Interface_Name (E,
10229 Make_String_Literal (Sloc (S),
10230 Strval => End_String));
10232 end Set_Encoded_Interface_Name;
10234 -------------------
10235 -- Set_Unit_Name --
10236 -------------------
10238 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
10243 if Nkind (N) = N_Identifier
10244 and then Nkind (With_Item) = N_Identifier
10246 Set_Entity (N, Entity (With_Item));
10248 elsif Nkind (N) = N_Selected_Component then
10249 Change_Selected_Component_To_Expanded_Name (N);
10250 Set_Entity (N, Entity (With_Item));
10251 Set_Entity (Selector_Name (N), Entity (N));
10253 Pref := Prefix (N);
10254 Scop := Scope (Entity (N));
10256 while Nkind (Pref) = N_Selected_Component loop
10257 Change_Selected_Component_To_Expanded_Name (Pref);
10258 Set_Entity (Selector_Name (Pref), Scop);
10259 Set_Entity (Pref, Scop);
10260 Pref := Prefix (Pref);
10261 Scop := Scope (Scop);
10264 Set_Entity (Pref, Scop);