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;
1697 procedure Set_Convention_From_Pragma (E : Entity_Id);
1698 -- Set convention in entity E, and also flag that the entity has a
1699 -- convention pragma. If entity is for a private or incomplete type,
1700 -- also set convention and flag on underlying type. This procedure
1701 -- also deals with the special case of C_Pass_By_Copy convention.
1703 --------------------------------
1704 -- Set_Convention_From_Pragma --
1705 --------------------------------
1707 procedure Set_Convention_From_Pragma (E : Entity_Id) is
1709 Set_Convention (E, C);
1710 Set_Has_Convention_Pragma (E);
1712 if Is_Incomplete_Or_Private_Type (E) then
1713 Set_Convention (Underlying_Type (E), C);
1714 Set_Has_Convention_Pragma (Underlying_Type (E), True);
1717 -- A class-wide type should inherit the convention of
1718 -- the specific root type (although this isn't specified
1719 -- clearly by the RM).
1721 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
1722 Set_Convention (Class_Wide_Type (E), C);
1725 -- If the entity is a record type, then check for special case
1726 -- of C_Pass_By_Copy, which is treated the same as C except that
1727 -- the special record flag is set. This convention is also only
1728 -- permitted on record types (see AI95-00131).
1730 if Cname = Name_C_Pass_By_Copy then
1731 if Is_Record_Type (E) then
1732 Set_C_Pass_By_Copy (Base_Type (E));
1733 elsif Is_Incomplete_Or_Private_Type (E)
1734 and then Is_Record_Type (Underlying_Type (E))
1736 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
1739 ("C_Pass_By_Copy convention allowed only for record type",
1744 -- If the entity is a derived boolean type, check for the
1745 -- special case of convention C, C++, or Fortran, where we
1746 -- consider any nonzero value to represent true.
1748 if Is_Discrete_Type (E)
1749 and then Root_Type (Etype (E)) = Standard_Boolean
1755 C = Convention_Fortran)
1757 Set_Nonzero_Is_True (Base_Type (E));
1759 end Set_Convention_From_Pragma;
1761 -- Start of processing for Process_Convention
1764 Check_At_Least_N_Arguments (2);
1765 Check_Arg_Is_Identifier (Arg1);
1766 Check_Optional_Identifier (Arg1, Name_Convention);
1767 Cname := Chars (Expression (Arg1));
1769 -- C_Pass_By_Copy is treated as a synonym for convention C
1770 -- (this is tested again below to set the critical flag)
1772 if Cname = Name_C_Pass_By_Copy then
1775 -- Otherwise we must have something in the standard convention list
1777 elsif Is_Convention_Name (Cname) then
1778 C := Get_Convention_Id (Chars (Expression (Arg1)));
1780 -- In DEC VMS, it seems that there is an undocumented feature
1781 -- that any unrecognized convention is treated as the default,
1782 -- which for us is convention C. It does not seem so terrible
1783 -- to do this unconditionally, silently in the VMS case, and
1784 -- with a warning in the non-VMS case.
1787 if Warn_On_Export_Import and not OpenVMS_On_Target then
1789 ("?unrecognized convention name, C assumed",
1796 Check_Arg_Is_Local_Name (Arg2);
1797 Check_Optional_Identifier (Arg2, Name_Entity);
1799 Id := Expression (Arg2);
1802 if not Is_Entity_Name (Id) then
1803 Error_Pragma_Arg ("entity name required", Arg2);
1808 -- Go to renamed subprogram if present, since convention applies
1809 -- to the actual renamed entity, not to the renaming entity.
1811 if Is_Subprogram (E)
1812 and then Present (Alias (E))
1813 and then Nkind (Parent (Declaration_Node (E))) =
1814 N_Subprogram_Renaming_Declaration
1819 -- Check that we not applying this to a specless body
1821 if Is_Subprogram (E)
1822 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
1825 ("pragma% requires separate spec and must come before body");
1828 -- Check that we are not applying this to a named constant
1830 if Ekind (E) = E_Named_Integer
1832 Ekind (E) = E_Named_Real
1834 Error_Msg_Name_1 := Chars (N);
1836 ("cannot apply pragma% to named constant!",
1837 Get_Pragma_Arg (Arg2));
1839 ("\supply appropriate type for&!", Arg2);
1842 if Etype (E) = Any_Type
1843 or else Rep_Item_Too_Early (E, N)
1847 E := Underlying_Type (E);
1850 if Rep_Item_Too_Late (E, N) then
1854 if Has_Convention_Pragma (E) then
1856 ("at most one Convention/Export/Import pragma is allowed", Arg2);
1858 elsif Convention (E) = Convention_Protected
1859 or else Ekind (Scope (E)) = E_Protected_Type
1862 ("a protected operation cannot be given a different convention",
1866 -- For Intrinsic, a subprogram is required
1868 if C = Convention_Intrinsic
1869 and then not Is_Subprogram (E)
1870 and then not Is_Generic_Subprogram (E)
1873 ("second argument of pragma% must be a subprogram", Arg2);
1876 -- For Stdcall, a subprogram, variable or subprogram type is required
1878 if C = Convention_Stdcall
1879 and then not Is_Subprogram (E)
1880 and then not Is_Generic_Subprogram (E)
1881 and then Ekind (E) /= E_Variable
1884 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
1887 ("second argument of pragma% must be subprogram (type)",
1891 if not Is_Subprogram (E)
1892 and then not Is_Generic_Subprogram (E)
1894 Set_Convention_From_Pragma (E);
1898 Check_First_Subtype (Arg2);
1899 Set_Convention_From_Pragma (Base_Type (E));
1901 -- For subprograms, we must set the convention on the
1902 -- internally generated directly designated type as well.
1904 if Ekind (E) = E_Access_Subprogram_Type then
1905 Set_Convention_From_Pragma (Directly_Designated_Type (E));
1909 -- For the subprogram case, set proper convention for all homonyms
1913 Set_Convention_From_Pragma (E);
1915 -- Treat a pragma Import as an implicit body, for GPS use.
1917 if Prag_Id = Pragma_Import then
1918 Generate_Reference (E, Id, 'b');
1924 exit when No (E1) or else Scope (E1) /= Current_Scope;
1926 -- Note: below we are missing a check for Rep_Item_Too_Late.
1927 -- That is deliberate, we cannot chain the rep item on more
1928 -- than one Rep_Item chain, to be fixed later ???
1930 if Comes_From_Source (E1)
1931 and then Nkind (Original_Node (Parent (E1))) /=
1932 N_Full_Type_Declaration
1934 Set_Convention_From_Pragma (E1);
1936 if Prag_Id = Pragma_Import then
1937 Generate_Reference (E, Id, 'b');
1942 end Process_Convention;
1944 -----------------------------------------------------
1945 -- Process_Extended_Import_Export_Exception_Pragma --
1946 -----------------------------------------------------
1948 procedure Process_Extended_Import_Export_Exception_Pragma
1949 (Arg_Internal : Node_Id;
1950 Arg_External : Node_Id;
1960 if not OpenVMS_On_Target then
1962 ("?pragma% ignored (applies only to Open'V'M'S)");
1965 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
1966 Def_Id := Entity (Arg_Internal);
1968 if Ekind (Def_Id) /= E_Exception then
1970 ("pragma% must refer to declared exception", Arg_Internal);
1973 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
1975 if Present (Arg_Form) then
1976 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
1979 if Present (Arg_Form)
1980 and then Chars (Arg_Form) = Name_Ada
1984 Set_Is_VMS_Exception (Def_Id);
1985 Set_Exception_Code (Def_Id, No_Uint);
1988 if Present (Arg_Code) then
1989 if not Is_VMS_Exception (Def_Id) then
1991 ("Code option for pragma% not allowed for Ada case",
1995 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
1996 Code_Val := Expr_Value (Arg_Code);
1998 if not UI_Is_In_Int_Range (Code_Val) then
2000 ("Code option for pragma% must be in 32-bit range",
2004 Set_Exception_Code (Def_Id, Code_Val);
2007 end Process_Extended_Import_Export_Exception_Pragma;
2009 -------------------------------------------------
2010 -- Process_Extended_Import_Export_Internal_Arg --
2011 -------------------------------------------------
2013 procedure Process_Extended_Import_Export_Internal_Arg
2014 (Arg_Internal : Node_Id := Empty)
2019 if No (Arg_Internal) then
2020 Error_Pragma ("Internal parameter required for pragma%");
2023 if Nkind (Arg_Internal) = N_Identifier then
2026 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2027 and then (Prag_Id = Pragma_Import_Function
2029 Prag_Id = Pragma_Export_Function)
2035 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2038 Check_Arg_Is_Local_Name (Arg_Internal);
2039 end Process_Extended_Import_Export_Internal_Arg;
2041 --------------------------------------------------
2042 -- Process_Extended_Import_Export_Object_Pragma --
2043 --------------------------------------------------
2045 procedure Process_Extended_Import_Export_Object_Pragma
2046 (Arg_Internal : Node_Id;
2047 Arg_External : Node_Id;
2053 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2054 Def_Id := Entity (Arg_Internal);
2056 if Ekind (Def_Id) /= E_Constant
2057 and then Ekind (Def_Id) /= E_Variable
2060 ("pragma% must designate an object", Arg_Internal);
2063 if Is_Psected (Def_Id) then
2065 ("previous Psect_Object applies, pragma % not permitted",
2069 if Rep_Item_Too_Late (Def_Id, N) then
2073 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2075 if Present (Arg_Size)
2076 and then Nkind (Arg_Size) /= N_Identifier
2077 and then Nkind (Arg_Size) /= N_String_Literal
2080 ("pragma% Size argument must be identifier or string literal",
2084 -- Export_Object case
2086 if Prag_Id = Pragma_Export_Object then
2087 if not Is_Library_Level_Entity (Def_Id) then
2089 ("argument for pragma% must be library level entity",
2093 if Ekind (Current_Scope) = E_Generic_Package then
2094 Error_Pragma ("pragma& cannot appear in a generic unit");
2097 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2099 ("exported object must have compile time known size",
2103 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2105 ("?duplicate Export_Object pragma", N);
2107 Set_Exported (Def_Id, Arg_Internal);
2110 -- Import_Object case
2113 if Is_Concurrent_Type (Etype (Def_Id)) then
2115 ("cannot use pragma% for task/protected object",
2119 if Ekind (Def_Id) = E_Constant then
2121 ("cannot import a constant", Arg_Internal);
2124 if Warn_On_Export_Import
2125 and then Has_Discriminants (Etype (Def_Id))
2128 ("imported value must be initialized?", Arg_Internal);
2131 if Warn_On_Export_Import
2132 and then Is_Access_Type (Etype (Def_Id))
2135 ("cannot import object of an access type?", Arg_Internal);
2138 if Warn_On_Export_Import
2139 and then Is_Imported (Def_Id)
2142 ("?duplicate Import_Object pragma", N);
2144 -- Check for explicit initialization present. Note that an
2145 -- initialization that generated by the code generator, e.g.
2146 -- for an access type, does not count here.
2148 elsif Present (Expression (Parent (Def_Id)))
2151 (Original_Node (Expression (Parent (Def_Id))))
2153 Error_Msg_Sloc := Sloc (Def_Id);
2155 ("no initialization allowed for declaration of& #",
2156 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2159 Set_Imported (Def_Id);
2160 Note_Possible_Modification (Arg_Internal);
2163 end Process_Extended_Import_Export_Object_Pragma;
2165 ------------------------------------------------------
2166 -- Process_Extended_Import_Export_Subprogram_Pragma --
2167 ------------------------------------------------------
2169 procedure Process_Extended_Import_Export_Subprogram_Pragma
2170 (Arg_Internal : Node_Id;
2171 Arg_External : Node_Id;
2172 Arg_Parameter_Types : Node_Id;
2173 Arg_Result_Type : Node_Id := Empty;
2174 Arg_Mechanism : Node_Id;
2175 Arg_Result_Mechanism : Node_Id := Empty;
2176 Arg_First_Optional_Parameter : Node_Id := Empty)
2182 Ambiguous : Boolean;
2186 function Same_Base_Type
2188 Formal : Entity_Id) return Boolean;
2189 -- Determines if Ptype references the type of Formal. Note that
2190 -- only the base types need to match according to the spec. Ptype
2191 -- here is the argument from the pragma, which is either a type
2192 -- name, or an access attribute.
2194 --------------------
2195 -- Same_Base_Type --
2196 --------------------
2198 function Same_Base_Type
2200 Formal : Entity_Id) return Boolean
2202 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2206 -- Case where pragma argument is typ'Access
2208 if Nkind (Ptype) = N_Attribute_Reference
2209 and then Attribute_Name (Ptype) = Name_Access
2211 Pref := Prefix (Ptype);
2214 if not Is_Entity_Name (Pref)
2215 or else Entity (Pref) = Any_Type
2220 -- We have a match if the corresponding argument is of an
2221 -- anonymous access type, and its designicated type matches
2222 -- the type of the prefix of the access attribute
2224 return Ekind (Ftyp) = E_Anonymous_Access_Type
2225 and then Base_Type (Entity (Pref)) =
2226 Base_Type (Etype (Designated_Type (Ftyp)));
2228 -- Case where pragma argument is a type name
2233 if not Is_Entity_Name (Ptype)
2234 or else Entity (Ptype) = Any_Type
2239 -- We have a match if the corresponding argument is of
2240 -- the type given in the pragma (comparing base types)
2242 return Base_Type (Entity (Ptype)) = Ftyp;
2246 -- Start of processing for
2247 -- Process_Extended_Import_Export_Subprogram_Pragma
2250 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2251 Hom_Id := Entity (Arg_Internal);
2255 -- Loop through homonyms (overloadings) of Hom_Id
2257 while Present (Hom_Id) loop
2258 Def_Id := Get_Base_Subprogram (Hom_Id);
2260 -- We need a subprogram in the current scope
2262 if not Is_Subprogram (Def_Id)
2263 or else Scope (Def_Id) /= Current_Scope
2270 -- Pragma cannot apply to subprogram body
2272 if Is_Subprogram (Def_Id)
2275 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2278 ("pragma% requires separate spec"
2279 & " and must come before body");
2282 -- Test result type if given, note that the result type
2283 -- parameter can only be present for the function cases.
2285 if Present (Arg_Result_Type)
2286 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2290 elsif Etype (Def_Id) /= Standard_Void_Type
2292 (Chars (N) = Name_Export_Procedure
2293 or else Chars (N) = Name_Import_Procedure)
2297 -- Test parameter types if given. Note that this parameter
2298 -- has not been analyzed (and must not be, since it is
2299 -- semantic nonsense), so we get it as the parser left it.
2301 elsif Present (Arg_Parameter_Types) then
2302 Check_Matching_Types : declare
2307 Formal := First_Formal (Def_Id);
2309 if Nkind (Arg_Parameter_Types) = N_Null then
2310 if Present (Formal) then
2314 -- A list of one type, e.g. (List) is parsed as
2315 -- a parenthesized expression.
2317 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2318 and then Paren_Count (Arg_Parameter_Types) = 1
2321 or else Present (Next_Formal (Formal))
2326 Same_Base_Type (Arg_Parameter_Types, Formal);
2329 -- A list of more than one type is parsed as a aggregate
2331 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2332 and then Paren_Count (Arg_Parameter_Types) = 0
2334 Ptype := First (Expressions (Arg_Parameter_Types));
2335 while Present (Ptype) or else Present (Formal) loop
2338 or else not Same_Base_Type (Ptype, Formal)
2343 Next_Formal (Formal);
2348 -- Anything else is of the wrong form
2352 ("wrong form for Parameter_Types parameter",
2353 Arg_Parameter_Types);
2355 end Check_Matching_Types;
2358 -- Match is now False if the entry we found did not match
2359 -- either a supplied Parameter_Types or Result_Types argument
2365 -- Ambiguous case, the flag Ambiguous shows if we already
2366 -- detected this and output the initial messages.
2369 if not Ambiguous then
2371 Error_Msg_Name_1 := Chars (N);
2373 ("pragma% does not uniquely identify subprogram!",
2375 Error_Msg_Sloc := Sloc (Ent);
2376 Error_Msg_N ("matching subprogram #!", N);
2380 Error_Msg_Sloc := Sloc (Def_Id);
2381 Error_Msg_N ("matching subprogram #!", N);
2386 Hom_Id := Homonym (Hom_Id);
2389 -- See if we found an entry
2392 if not Ambiguous then
2393 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
2395 ("pragma% cannot be given for generic subprogram");
2399 ("pragma% does not identify local subprogram");
2406 -- Import pragmas must be be for imported entities
2408 if Prag_Id = Pragma_Import_Function
2410 Prag_Id = Pragma_Import_Procedure
2412 Prag_Id = Pragma_Import_Valued_Procedure
2414 if not Is_Imported (Ent) then
2416 ("pragma Import or Interface must precede pragma%");
2419 -- Here we have the Export case which can set the entity as exported
2421 -- But does not do so if the specified external name is null,
2422 -- since that is taken as a signal in DEC Ada 83 (with which
2423 -- we want to be compatible) to request no external name.
2425 elsif Nkind (Arg_External) = N_String_Literal
2426 and then String_Length (Strval (Arg_External)) = 0
2430 -- In all other cases, set entit as exported
2433 Set_Exported (Ent, Arg_Internal);
2436 -- Special processing for Valued_Procedure cases
2438 if Prag_Id = Pragma_Import_Valued_Procedure
2440 Prag_Id = Pragma_Export_Valued_Procedure
2442 Formal := First_Formal (Ent);
2446 ("at least one parameter required for pragma%");
2448 elsif Ekind (Formal) /= E_Out_Parameter then
2450 ("first parameter must have mode out for pragma%");
2453 Set_Is_Valued_Procedure (Ent);
2457 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
2459 -- Process Result_Mechanism argument if present. We have already
2460 -- checked that this is only allowed for the function case.
2462 if Present (Arg_Result_Mechanism) then
2463 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
2466 -- Process Mechanism parameter if present. Note that this parameter
2467 -- is not analyzed, and must not be analyzed since it is semantic
2468 -- nonsense, so we get it in exactly as the parser left it.
2470 if Present (Arg_Mechanism) then
2478 -- A single mechanism association without a formal parameter
2479 -- name is parsed as a parenthesized expression. All other
2480 -- cases are parsed as aggregates, so we rewrite the single
2481 -- parameter case as an aggregate for consistency.
2483 if Nkind (Arg_Mechanism) /= N_Aggregate
2484 and then Paren_Count (Arg_Mechanism) = 1
2486 Rewrite (Arg_Mechanism,
2487 Make_Aggregate (Sloc (Arg_Mechanism),
2488 Expressions => New_List (
2489 Relocate_Node (Arg_Mechanism))));
2492 -- Case of only mechanism name given, applies to all formals
2494 if Nkind (Arg_Mechanism) /= N_Aggregate then
2495 Formal := First_Formal (Ent);
2496 while Present (Formal) loop
2497 Set_Mechanism_Value (Formal, Arg_Mechanism);
2498 Next_Formal (Formal);
2501 -- Case of list of mechanism associations given
2504 if Null_Record_Present (Arg_Mechanism) then
2506 ("inappropriate form for Mechanism parameter",
2510 -- Deal with positional ones first
2512 Formal := First_Formal (Ent);
2513 if Present (Expressions (Arg_Mechanism)) then
2514 Mname := First (Expressions (Arg_Mechanism));
2516 while Present (Mname) loop
2519 ("too many mechanism associations", Mname);
2522 Set_Mechanism_Value (Formal, Mname);
2523 Next_Formal (Formal);
2528 -- Deal with named entries
2530 if Present (Component_Associations (Arg_Mechanism)) then
2531 Massoc := First (Component_Associations (Arg_Mechanism));
2533 while Present (Massoc) loop
2534 Choice := First (Choices (Massoc));
2536 if Nkind (Choice) /= N_Identifier
2537 or else Present (Next (Choice))
2540 ("incorrect form for mechanism association",
2544 Formal := First_Formal (Ent);
2548 ("parameter name & not present", Choice);
2551 if Chars (Choice) = Chars (Formal) then
2553 (Formal, Expression (Massoc));
2557 Next_Formal (Formal);
2567 -- Process First_Optional_Parameter argument if present. We have
2568 -- already checked that this is only allowed for the Import case.
2570 if Present (Arg_First_Optional_Parameter) then
2571 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
2573 ("first optional parameter must be formal parameter name",
2574 Arg_First_Optional_Parameter);
2577 Formal := First_Formal (Ent);
2581 ("specified formal parameter& not found",
2582 Arg_First_Optional_Parameter);
2585 exit when Chars (Formal) =
2586 Chars (Arg_First_Optional_Parameter);
2588 Next_Formal (Formal);
2591 Set_First_Optional_Parameter (Ent, Formal);
2593 -- Check specified and all remaining formals have right form
2595 while Present (Formal) loop
2596 if Ekind (Formal) /= E_In_Parameter then
2598 ("optional formal& is not of mode in!",
2599 Arg_First_Optional_Parameter, Formal);
2602 Dval := Default_Value (Formal);
2604 if not Present (Dval) then
2606 ("optional formal& does not have default value!",
2607 Arg_First_Optional_Parameter, Formal);
2609 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
2614 ("default value for optional formal& is non-static!",
2615 Arg_First_Optional_Parameter, Formal);
2619 Set_Is_Optional_Parameter (Formal);
2620 Next_Formal (Formal);
2623 end Process_Extended_Import_Export_Subprogram_Pragma;
2625 --------------------------
2626 -- Process_Generic_List --
2627 --------------------------
2629 procedure Process_Generic_List is
2635 Check_No_Identifiers;
2636 Check_At_Least_N_Arguments (1);
2639 while Present (Arg) loop
2640 Exp := Expression (Arg);
2643 if not Is_Entity_Name (Exp)
2645 (not Is_Generic_Instance (Entity (Exp))
2647 not Is_Generic_Unit (Entity (Exp)))
2650 ("pragma% argument must be name of generic unit/instance",
2656 end Process_Generic_List;
2658 ---------------------------------
2659 -- Process_Import_Or_Interface --
2660 ---------------------------------
2662 procedure Process_Import_Or_Interface is
2668 Process_Convention (C, Def_Id);
2669 Kill_Size_Check_Code (Def_Id);
2670 Note_Possible_Modification (Expression (Arg2));
2672 if Ekind (Def_Id) = E_Variable
2674 Ekind (Def_Id) = E_Constant
2676 -- User initialization is not allowed for imported object, but
2677 -- the object declaration may contain a default initialization,
2678 -- that will be discarded. Note that an explicit initialization
2679 -- only counts if it comes from source, otherwise it is simply
2680 -- the code generator making an implicit initialization explicit.
2682 if Present (Expression (Parent (Def_Id)))
2683 and then Comes_From_Source (Expression (Parent (Def_Id)))
2685 Error_Msg_Sloc := Sloc (Def_Id);
2687 ("no initialization allowed for declaration of& #",
2688 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2692 Set_Imported (Def_Id);
2693 Set_Is_Public (Def_Id);
2694 Process_Interface_Name (Def_Id, Arg3, Arg4);
2696 -- It is not possible to import a constant of an unconstrained
2697 -- array type (e.g. string) because there is no simple way to
2698 -- write a meaningful subtype for it.
2700 if Is_Array_Type (Etype (Def_Id))
2701 and then not Is_Constrained (Etype (Def_Id))
2704 ("imported constant& must have a constrained subtype",
2709 elsif Is_Subprogram (Def_Id)
2710 or else Is_Generic_Subprogram (Def_Id)
2712 -- If the name is overloaded, pragma applies to all of the
2713 -- denoted entities in the same declarative part.
2717 while Present (Hom_Id) loop
2718 Def_Id := Get_Base_Subprogram (Hom_Id);
2720 -- Ignore inherited subprograms because the pragma will
2721 -- apply to the parent operation, which is the one called.
2723 if Is_Overloadable (Def_Id)
2724 and then Present (Alias (Def_Id))
2728 -- If it is not a subprogram, it must be in an outer
2729 -- scope and pragma does not apply.
2731 elsif not Is_Subprogram (Def_Id)
2732 and then not Is_Generic_Subprogram (Def_Id)
2736 -- Verify that the homonym is in the same declarative
2737 -- part (not just the same scope).
2739 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
2740 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
2745 Set_Imported (Def_Id);
2747 -- If Import intrinsic, set intrinsic flag
2748 -- and verify that it is known as such.
2750 if C = Convention_Intrinsic then
2751 Set_Is_Intrinsic_Subprogram (Def_Id);
2752 Check_Intrinsic_Subprogram
2753 (Def_Id, Expression (Arg2));
2756 -- All interfaced procedures need an external
2757 -- symbol created for them since they are
2758 -- always referenced from another object file.
2760 Set_Is_Public (Def_Id);
2762 -- Verify that the subprogram does not have a completion
2763 -- through a renaming declaration. For other completions
2764 -- the pragma appears as a too late representation.
2767 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
2771 and then Nkind (Decl) = N_Subprogram_Declaration
2772 and then Present (Corresponding_Body (Decl))
2775 (Unit_Declaration_Node
2776 (Corresponding_Body (Decl))) =
2777 N_Subprogram_Renaming_Declaration
2779 Error_Msg_Sloc := Sloc (Def_Id);
2780 Error_Msg_NE ("cannot import&#," &
2781 " already completed by a renaming",
2786 Set_Has_Completion (Def_Id);
2787 Process_Interface_Name (Def_Id, Arg3, Arg4);
2790 if Is_Compilation_Unit (Hom_Id) then
2792 -- Its possible homonyms are not affected by the pragma.
2793 -- Such homonyms might be present in the context of other
2794 -- units being compiled.
2799 Hom_Id := Homonym (Hom_Id);
2803 -- When the convention is Java, we also allow Import to be given
2804 -- for packages, exceptions, and record components.
2806 elsif C = Convention_Java
2808 (Ekind (Def_Id) = E_Package
2809 or else Ekind (Def_Id) = E_Exception
2810 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
2812 Set_Imported (Def_Id);
2813 Set_Is_Public (Def_Id);
2814 Process_Interface_Name (Def_Id, Arg3, Arg4);
2818 ("second argument of pragma% must be object or subprogram",
2822 -- If this pragma applies to a compilation unit, then the unit,
2823 -- which is a subprogram, does not require (or allow) a body.
2824 -- We also do not need to elaborate imported procedures.
2826 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
2828 Cunit : constant Node_Id := Parent (Parent (N));
2830 Set_Body_Required (Cunit, False);
2833 end Process_Import_Or_Interface;
2835 --------------------
2836 -- Process_Inline --
2837 --------------------
2839 procedure Process_Inline (Active : Boolean) is
2845 Effective : Boolean := False;
2847 procedure Make_Inline (Subp : Entity_Id);
2848 -- Subp is the defining unit name of the subprogram
2849 -- declaration. Set the flag, as well as the flag in the
2850 -- corresponding body, if there is one present.
2852 procedure Set_Inline_Flags (Subp : Entity_Id);
2853 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp
2855 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean;
2856 -- Do not set the inline flag if body is available and contains
2857 -- exception handlers, to prevent undefined symbols at link time.
2859 ----------------------------
2860 -- Back_End_Cannot_Inline --
2861 ----------------------------
2863 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean is
2864 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
2867 if Nkind (Decl) = N_Subprogram_Body then
2870 (Exception_Handlers (Handled_Statement_Sequence (Decl)));
2872 elsif Nkind (Decl) = N_Subprogram_Declaration
2873 and then Present (Corresponding_Body (Decl))
2875 -- If the subprogram is a renaming as body, the body is
2876 -- just a call to the renamed subprogram, and inlining is
2877 -- trivially possible.
2879 if Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
2880 N_Subprogram_Renaming_Declaration
2886 Present (Exception_Handlers
2887 (Handled_Statement_Sequence
2888 (Unit_Declaration_Node (Corresponding_Body (Decl)))));
2891 -- If body is not available, assume the best, the check is
2892 -- performed again when compiling enclosing package bodies.
2896 end Back_End_Cannot_Inline;
2902 procedure Make_Inline (Subp : Entity_Id) is
2903 Kind : constant Entity_Kind := Ekind (Subp);
2904 Inner_Subp : Entity_Id := Subp;
2907 if Etype (Subp) = Any_Type then
2910 elsif Back_End_Cannot_Inline (Subp) then
2911 Applies := True; -- Do not treat as an error.
2914 -- Here we have a candidate for inlining, but we must exclude
2915 -- derived operations. Otherwise we will end up trying to
2916 -- inline a phantom declaration, and the result would be to
2917 -- drag in a body which has no direct inlining associated with
2918 -- it. That would not only be inefficient but would also result
2919 -- in the backend doing cross-unit inlining in cases where it
2920 -- was definitely inappropriate to do so.
2922 -- However, a simple Comes_From_Source test is insufficient,
2923 -- since we do want to allow inlining of generic instances,
2924 -- which also do not come from source. Predefined operators do
2925 -- not come from source but are not inlineable either.
2927 elsif not Comes_From_Source (Subp)
2928 and then not Is_Generic_Instance (Subp)
2929 and then Scope (Subp) /= Standard_Standard
2934 -- The referenced entity must either be the enclosing entity,
2935 -- or an entity declared within the current open scope.
2937 elsif Present (Scope (Subp))
2938 and then Scope (Subp) /= Current_Scope
2939 and then Subp /= Current_Scope
2942 ("argument of% must be entity in current scope", Assoc);
2946 -- Processing for procedure, operator or function.
2947 -- If subprogram is aliased (as for an instance) indicate
2948 -- that the renamed entity is inlined.
2950 if Is_Subprogram (Subp) then
2951 while Present (Alias (Inner_Subp)) loop
2952 Inner_Subp := Alias (Inner_Subp);
2955 Set_Inline_Flags (Inner_Subp);
2957 Decl := Parent (Parent (Inner_Subp));
2959 if Nkind (Decl) = N_Subprogram_Declaration
2960 and then Present (Corresponding_Body (Decl))
2962 Set_Inline_Flags (Corresponding_Body (Decl));
2967 -- For a generic subprogram set flag as well, for use at
2968 -- the point of instantiation, to determine whether the
2969 -- body should be generated.
2971 elsif Is_Generic_Subprogram (Subp) then
2972 Set_Inline_Flags (Subp);
2975 -- Literals are by definition inlined
2977 elsif Kind = E_Enumeration_Literal then
2980 -- Anything else is an error
2984 ("expect subprogram name for pragma%", Assoc);
2988 ----------------------
2989 -- Set_Inline_Flags --
2990 ----------------------
2992 procedure Set_Inline_Flags (Subp : Entity_Id) is
2995 Set_Is_Inlined (Subp, True);
2998 if not Has_Pragma_Inline (Subp) then
2999 Set_Has_Pragma_Inline (Subp);
3000 Set_Next_Rep_Item (N, First_Rep_Item (Subp));
3001 Set_First_Rep_Item (Subp, N);
3004 end Set_Inline_Flags;
3006 -- Start of processing for Process_Inline
3009 Check_No_Identifiers;
3010 Check_At_Least_N_Arguments (1);
3013 Inline_Processing_Required := True;
3017 while Present (Assoc) loop
3018 Subp_Id := Expression (Assoc);
3022 if Is_Entity_Name (Subp_Id) then
3023 Subp := Entity (Subp_Id);
3025 if Subp = Any_Id then
3031 while Present (Homonym (Subp))
3032 and then Scope (Homonym (Subp)) = Current_Scope
3034 Make_Inline (Homonym (Subp));
3035 Subp := Homonym (Subp);
3042 ("inappropriate argument for pragma%", Assoc);
3045 and then Warn_On_Redundant_Constructs
3047 Error_Msg_NE ("pragma inline on& is redundant?",
3048 N, Entity (Subp_Id));
3055 ----------------------------
3056 -- Process_Interface_Name --
3057 ----------------------------
3059 procedure Process_Interface_Name
3060 (Subprogram_Def : Entity_Id;
3066 String_Val : String_Id;
3068 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3069 -- SN is a string literal node for an interface name. This routine
3070 -- performs some minimal checks that the name is reasonable. In
3071 -- particular that no spaces or other obviously incorrect characters
3072 -- appear. This is only a warning, since any characters are allowed.
3074 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3075 S : constant String_Id := Strval (Expr_Value_S (SN));
3076 SL : constant Nat := String_Length (S);
3081 Error_Msg_N ("interface name cannot be null string", SN);
3084 for J in 1 .. SL loop
3085 C := Get_String_Char (S, J);
3087 if Warn_On_Export_Import
3088 and then (not In_Character_Range (C)
3089 or else Get_Character (C) = ' '
3090 or else Get_Character (C) = ',')
3093 ("?interface name contains illegal character", SN);
3096 end Check_Form_Of_Interface_Name;
3098 -- Start of processing for Process_Interface_Name
3101 if No (Link_Arg) then
3102 if No (Ext_Arg) then
3105 elsif Chars (Ext_Arg) = Name_Link_Name then
3107 Link_Nam := Expression (Ext_Arg);
3110 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3111 Ext_Nam := Expression (Ext_Arg);
3116 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3117 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3118 Ext_Nam := Expression (Ext_Arg);
3119 Link_Nam := Expression (Link_Arg);
3122 -- Check expressions for external name and link name are static
3124 if Present (Ext_Nam) then
3125 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3126 Check_Form_Of_Interface_Name (Ext_Nam);
3128 -- Verify that the external name is not the name of a local
3129 -- entity, which would hide the imported one and lead to
3130 -- run-time surprises. The problem can only arise for entities
3131 -- declared in a package body (otherwise the external name is
3132 -- fully qualified and won't conflict).
3140 if Prag_Id = Pragma_Import then
3141 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3143 E := Entity_Id (Get_Name_Table_Info (Nam));
3145 if Nam /= Chars (Subprogram_Def)
3146 and then Present (E)
3147 and then not Is_Overloadable (E)
3148 and then Is_Immediately_Visible (E)
3149 and then not Is_Imported (E)
3150 and then Ekind (Scope (E)) = E_Package
3154 while Present (Par) loop
3155 if Nkind (Par) = N_Package_Body then
3156 Error_Msg_Sloc := Sloc (E);
3158 ("imported entity is hidden by & declared#",
3163 Par := Parent (Par);
3170 if Present (Link_Nam) then
3171 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3172 Check_Form_Of_Interface_Name (Link_Nam);
3175 -- If there is no link name, just set the external name
3177 if No (Link_Nam) then
3178 Set_Encoded_Interface_Name
3179 (Get_Base_Subprogram (Subprogram_Def),
3180 Adjust_External_Name_Case (Expr_Value_S (Ext_Nam)));
3182 -- For the Link_Name case, the given literal is preceded by an
3183 -- asterisk, which indicates to GCC that the given name should
3184 -- be taken literally, and in particular that no prepending of
3185 -- underlines should occur, even in systems where this is the
3190 Store_String_Char (Get_Char_Code ('*'));
3191 String_Val := Strval (Expr_Value_S (Link_Nam));
3193 for J in 1 .. String_Length (String_Val) loop
3194 Store_String_Char (Get_String_Char (String_Val, J));
3198 Make_String_Literal (Sloc (Link_Nam), End_String);
3200 Set_Encoded_Interface_Name
3201 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3203 end Process_Interface_Name;
3205 -----------------------------------------
3206 -- Process_Interrupt_Or_Attach_Handler --
3207 -----------------------------------------
3209 procedure Process_Interrupt_Or_Attach_Handler is
3210 Arg1_X : constant Node_Id := Expression (Arg1);
3211 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3212 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3215 Set_Is_Interrupt_Handler (Handler_Proc);
3217 -- If the pragma is not associated with a handler procedure
3218 -- within a protected type, then it must be for a nonprotected
3219 -- procedure for the AAMP target, in which case we don't
3220 -- associate a representation item with the procedure's scope.
3222 if Ekind (Proc_Scope) = E_Protected_Type then
3223 if Prag_Id = Pragma_Interrupt_Handler
3225 Prag_Id = Pragma_Attach_Handler
3227 Record_Rep_Item (Proc_Scope, N);
3230 end Process_Interrupt_Or_Attach_Handler;
3232 --------------------------------------------------
3233 -- Process_Restrictions_Or_Restriction_Warnings --
3234 --------------------------------------------------
3236 procedure Process_Restrictions_Or_Restriction_Warnings is
3238 R_Id : Restriction_Id;
3243 procedure Set_Warning (R : All_Restrictions);
3244 -- If this is a Restriction_Warnings pragma, set warning flag
3246 procedure Set_Warning (R : All_Restrictions) is
3248 if Prag_Id = Pragma_Restriction_Warnings then
3249 Restriction_Warnings (R) := True;
3253 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
3256 Check_Ada_83_Warning;
3257 Check_At_Least_N_Arguments (1);
3258 Check_Valid_Configuration_Pragma;
3261 while Present (Arg) loop
3263 Expr := Expression (Arg);
3265 -- Case of no restriction identifier
3267 if Id = No_Name then
3268 if Nkind (Expr) /= N_Identifier then
3270 ("invalid form for restriction", Arg);
3273 -- No_Requeue is a synonym for No_Requeue_Statements
3275 if Chars (Expr) = Name_No_Requeue then
3277 (No_Implementation_Restrictions, Arg);
3278 Set_Restriction (No_Requeue_Statements, N);
3279 Set_Warning (No_Requeue_Statements);
3281 -- No_Task_Attributes is a synonym for
3282 -- No_Task_Attributes_Package
3284 elsif Chars (Expr) = Name_No_Task_Attributes then
3286 (No_Implementation_Restrictions, Arg);
3287 Set_Restriction (No_Task_Attributes_Package, N);
3288 Set_Warning (No_Task_Attributes_Package);
3290 -- Normal processing for all other cases
3293 R_Id := Get_Restriction_Id (Chars (Expr));
3295 if R_Id not in All_Boolean_Restrictions then
3297 ("invalid restriction identifier", Arg);
3299 -- Restriction is active
3302 if Implementation_Restriction (R_Id) then
3304 (No_Implementation_Restrictions, Arg);
3307 Set_Restriction (R_Id, N);
3310 -- A very special case that must be processed here:
3311 -- pragma Restrictions (No_Exceptions) turns off
3312 -- all run-time checking. This is a bit dubious in
3313 -- terms of the formal language definition, but it
3314 -- is what is intended by RM H.4(12).
3316 if R_Id = No_Exceptions then
3317 Scope_Suppress := (others => True);
3323 -- Case of restriction identifier present
3326 R_Id := Get_Restriction_Id (Id);
3327 Analyze_And_Resolve (Expr, Any_Integer);
3329 if R_Id not in All_Parameter_Restrictions then
3331 ("invalid restriction parameter identifier", Arg);
3333 elsif not Is_OK_Static_Expression (Expr) then
3334 Flag_Non_Static_Expr
3335 ("value must be static expression!", Expr);
3338 elsif not Is_Integer_Type (Etype (Expr))
3339 or else Expr_Value (Expr) < 0
3342 ("value must be non-negative integer", Arg);
3344 -- Restriction pragma is active
3347 Val := Expr_Value (Expr);
3349 if not UI_Is_In_Int_Range (Val) then
3351 ("pragma ignored, value too large?", Arg);
3353 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
3361 end Process_Restrictions_Or_Restriction_Warnings;
3363 ---------------------------------
3364 -- Process_Suppress_Unsuppress --
3365 ---------------------------------
3367 -- Note: this procedure makes entries in the check suppress data
3368 -- structures managed by Sem. See spec of package Sem for full
3369 -- details on how we handle recording of check suppression.
3371 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
3376 In_Package_Spec : constant Boolean :=
3377 (Ekind (Current_Scope) = E_Package
3379 Ekind (Current_Scope) = E_Generic_Package)
3380 and then not In_Package_Body (Current_Scope);
3382 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
3383 -- Used to suppress a single check on the given entity
3385 --------------------------------
3386 -- Suppress_Unsuppress_Echeck --
3387 --------------------------------
3389 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
3390 ESR : constant Entity_Check_Suppress_Record :=
3393 Suppress => Suppress_Case);
3396 Set_Checks_May_Be_Suppressed (E);
3398 if In_Package_Spec then
3399 Global_Entity_Suppress.Append (ESR);
3401 Local_Entity_Suppress.Append (ESR);
3404 -- If this is a first subtype, and the base type is distinct,
3405 -- then also set the suppress flags on the base type.
3407 if Is_First_Subtype (E)
3408 and then Etype (E) /= E
3410 Suppress_Unsuppress_Echeck (Etype (E), C);
3412 end Suppress_Unsuppress_Echeck;
3414 -- Start of processing for Process_Suppress_Unsuppress
3417 -- Suppress/Unsuppress can appear as a configuration pragma,
3418 -- or in a declarative part or a package spec (RM 11.5(5))
3420 if not Is_Configuration_Pragma then
3421 Check_Is_In_Decl_Part_Or_Package_Spec;
3424 Check_At_Least_N_Arguments (1);
3425 Check_At_Most_N_Arguments (2);
3426 Check_No_Identifier (Arg1);
3427 Check_Arg_Is_Identifier (Arg1);
3429 if not Is_Check_Name (Chars (Expression (Arg1))) then
3431 ("argument of pragma% is not valid check name", Arg1);
3433 C := Get_Check_Id (Chars (Expression (Arg1)));
3436 if Arg_Count = 1 then
3438 -- Make an entry in the local scope suppress table. This is the
3439 -- table that directly shows the current value of the scope
3440 -- suppress check for any check id value.
3442 if C = All_Checks then
3443 for J in Scope_Suppress'Range loop
3444 Scope_Suppress (J) := Suppress_Case;
3447 Scope_Suppress (C) := Suppress_Case;
3450 -- Also make an entry in the Local_Entity_Suppress table. See
3451 -- extended description in the package spec of Sem for details.
3453 Local_Entity_Suppress.Append
3456 Suppress => Suppress_Case));
3458 -- Case of two arguments present, where the check is
3459 -- suppressed for a specified entity (given as the second
3460 -- argument of the pragma)
3463 Check_Optional_Identifier (Arg2, Name_On);
3464 E_Id := Expression (Arg2);
3467 if not Is_Entity_Name (E_Id) then
3469 ("second argument of pragma% must be entity name", Arg2);
3478 -- Enforce RM 11.5(7) which requires that for a pragma that
3479 -- appears within a package spec, the named entity must be
3480 -- within the package spec. We allow the package name itself
3481 -- to be mentioned since that makes sense, although it is not
3482 -- strictly allowed by 11.5(7).
3485 and then E /= Current_Scope
3486 and then Scope (E) /= Current_Scope
3489 ("entity in pragma% is not in package spec ('R'M 11.5(7))",
3493 -- Loop through homonyms. As noted below, in the case of a package
3494 -- spec, only homonyms within the package spec are considered.
3497 Suppress_Unsuppress_Echeck (E, C);
3499 if Is_Generic_Instance (E)
3500 and then Is_Subprogram (E)
3501 and then Present (Alias (E))
3503 Suppress_Unsuppress_Echeck (Alias (E), C);
3506 -- Move to next homonym
3511 -- If we are within a package specification, the
3512 -- pragma only applies to homonyms in the same scope.
3514 exit when In_Package_Spec
3515 and then Scope (E) /= Current_Scope;
3518 end Process_Suppress_Unsuppress;
3524 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
3526 if Is_Imported (E) then
3528 ("cannot export entity& that was previously imported", Arg);
3530 elsif Present (Address_Clause (E)) then
3532 ("cannot export entity& that has an address clause", Arg);
3535 Set_Is_Exported (E);
3537 -- Generate a reference for entity explicitly, because the
3538 -- identifier may be overloaded and name resolution will not
3541 Generate_Reference (E, Arg);
3543 -- Deal with exporting non-library level entity
3545 if not Is_Library_Level_Entity (E) then
3547 -- Not allowed at all for subprograms
3549 if Is_Subprogram (E) then
3550 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
3552 -- Otherwise set public and statically allocated
3556 Set_Is_Statically_Allocated (E);
3558 -- Warn if the corresponding W flag is set and the pragma
3559 -- comes from source. The latter may be not be true e.g. on
3560 -- VMS where we expand export pragmas for exception codes
3561 -- associated with imported or exported exceptions. We don't
3562 -- want the user to be warned about something he didn't write.
3564 if Warn_On_Export_Import
3565 and then Comes_From_Source (Arg)
3568 ("?& has been made static as a result of Export", Arg, E);
3570 ("\this usage is non-standard and non-portable", Arg);
3575 if Warn_On_Export_Import and then Is_Type (E) then
3577 ("exporting a type has no effect?", Arg, E);
3580 if Warn_On_Export_Import and Inside_A_Generic then
3582 ("all instances of& will have the same external name?", Arg, E);
3586 ----------------------------------------------
3587 -- Set_Extended_Import_Export_External_Name --
3588 ----------------------------------------------
3590 procedure Set_Extended_Import_Export_External_Name
3591 (Internal_Ent : Entity_Id;
3592 Arg_External : Node_Id)
3594 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
3598 if No (Arg_External) then
3601 elsif Nkind (Arg_External) = N_String_Literal then
3602 if String_Length (Strval (Arg_External)) = 0 then
3605 New_Name := Adjust_External_Name_Case (Arg_External);
3608 elsif Nkind (Arg_External) = N_Identifier then
3609 New_Name := Get_Default_External_Name (Arg_External);
3613 ("incorrect form for External parameter for pragma%",
3617 -- If we already have an external name set (by a prior normal
3618 -- Import or Export pragma), then the external names must match
3620 if Present (Interface_Name (Internal_Ent)) then
3622 S1 : constant String_Id := Strval (Old_Name);
3623 S2 : constant String_Id := Strval (New_Name);
3626 -- Called if names do not match
3628 procedure Mismatch is
3630 Error_Msg_Sloc := Sloc (Old_Name);
3632 ("external name does not match that given #",
3637 if String_Length (S1) /= String_Length (S2) then
3641 for J in 1 .. String_Length (S1) loop
3642 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
3649 -- Otherwise set the given name
3652 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
3655 end Set_Extended_Import_Export_External_Name;
3661 procedure Set_Imported (E : Entity_Id) is
3663 Error_Msg_Sloc := Sloc (E);
3665 if Is_Exported (E) or else Is_Imported (E) then
3666 Error_Msg_NE ("import of& declared# not allowed", N, E);
3668 if Is_Exported (E) then
3669 Error_Msg_N ("\entity was previously exported", N);
3671 Error_Msg_N ("\entity was previously imported", N);
3674 Error_Pragma ("\(pragma% applies to all previous entities)");
3677 Set_Is_Imported (E);
3679 -- If the entity is an object that is not at the library
3680 -- level, then it is statically allocated. We do not worry
3681 -- about objects with address clauses in this context since
3682 -- they are not really imported in the linker sense.
3685 and then not Is_Library_Level_Entity (E)
3686 and then No (Address_Clause (E))
3688 Set_Is_Statically_Allocated (E);
3693 -------------------------
3694 -- Set_Mechanism_Value --
3695 -------------------------
3697 -- Note: the mechanism name has not been analyzed (and cannot indeed
3698 -- be analyzed, since it is semantic nonsense), so we get it in the
3699 -- exact form created by the parser.
3701 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
3705 procedure Bad_Class;
3706 -- Signal bad descriptor class name
3708 procedure Bad_Mechanism;
3709 -- Signal bad mechanism name
3711 procedure Bad_Class is
3713 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
3716 procedure Bad_Mechanism is
3718 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
3721 -- Start of processing for Set_Mechanism_Value
3724 if Mechanism (Ent) /= Default_Mechanism then
3726 ("mechanism for & has already been set", Mech_Name, Ent);
3729 -- MECHANISM_NAME ::= value | reference | descriptor
3731 if Nkind (Mech_Name) = N_Identifier then
3732 if Chars (Mech_Name) = Name_Value then
3733 Set_Mechanism (Ent, By_Copy);
3736 elsif Chars (Mech_Name) = Name_Reference then
3737 Set_Mechanism (Ent, By_Reference);
3740 elsif Chars (Mech_Name) = Name_Descriptor then
3741 Check_VMS (Mech_Name);
3742 Set_Mechanism (Ent, By_Descriptor);
3745 elsif Chars (Mech_Name) = Name_Copy then
3747 ("bad mechanism name, Value assumed", Mech_Name);
3753 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
3754 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3756 -- Note: this form is parsed as an indexed component
3758 elsif Nkind (Mech_Name) = N_Indexed_Component then
3759 Class := First (Expressions (Mech_Name));
3761 if Nkind (Prefix (Mech_Name)) /= N_Identifier
3762 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
3763 or else Present (Next (Class))
3768 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
3769 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3771 -- Note: this form is parsed as a function call
3773 elsif Nkind (Mech_Name) = N_Function_Call then
3775 Param := First (Parameter_Associations (Mech_Name));
3777 if Nkind (Name (Mech_Name)) /= N_Identifier
3778 or else Chars (Name (Mech_Name)) /= Name_Descriptor
3779 or else Present (Next (Param))
3780 or else No (Selector_Name (Param))
3781 or else Chars (Selector_Name (Param)) /= Name_Class
3785 Class := Explicit_Actual_Parameter (Param);
3792 -- Fall through here with Class set to descriptor class name
3794 Check_VMS (Mech_Name);
3796 if Nkind (Class) /= N_Identifier then
3799 elsif Chars (Class) = Name_UBS then
3800 Set_Mechanism (Ent, By_Descriptor_UBS);
3802 elsif Chars (Class) = Name_UBSB then
3803 Set_Mechanism (Ent, By_Descriptor_UBSB);
3805 elsif Chars (Class) = Name_UBA then
3806 Set_Mechanism (Ent, By_Descriptor_UBA);
3808 elsif Chars (Class) = Name_S then
3809 Set_Mechanism (Ent, By_Descriptor_S);
3811 elsif Chars (Class) = Name_SB then
3812 Set_Mechanism (Ent, By_Descriptor_SB);
3814 elsif Chars (Class) = Name_A then
3815 Set_Mechanism (Ent, By_Descriptor_A);
3817 elsif Chars (Class) = Name_NCA then
3818 Set_Mechanism (Ent, By_Descriptor_NCA);
3824 end Set_Mechanism_Value;
3826 -- Start of processing for Analyze_Pragma
3829 if not Is_Pragma_Name (Chars (N)) then
3830 if Warn_On_Unrecognized_Pragma then
3831 Error_Pragma ("unrecognized pragma%!?");
3836 Prag_Id := Get_Pragma_Id (Chars (N));
3846 if Present (Pragma_Argument_Associations (N)) then
3847 Arg1 := First (Pragma_Argument_Associations (N));
3849 if Present (Arg1) then
3850 Arg2 := Next (Arg1);
3852 if Present (Arg2) then
3853 Arg3 := Next (Arg2);
3855 if Present (Arg3) then
3856 Arg4 := Next (Arg3);
3862 -- Count number of arguments
3869 while Present (Arg_Node) loop
3870 Arg_Count := Arg_Count + 1;
3875 -- An enumeration type defines the pragmas that are supported by the
3876 -- implementation. Get_Pragma_Id (in package Prag) transorms a name
3877 -- into the corresponding enumeration value for the following case.
3885 -- pragma Abort_Defer;
3887 when Pragma_Abort_Defer =>
3889 Check_Arg_Count (0);
3891 -- The only required semantic processing is to check the
3892 -- placement. This pragma must appear at the start of the
3893 -- statement sequence of a handled sequence of statements.
3895 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
3896 or else N /= First (Statements (Parent (N)))
3907 -- Note: this pragma also has some specific processing in Par.Prag
3908 -- because we want to set the Ada 83 mode switch during parsing.
3910 when Pragma_Ada_83 =>
3914 Check_Arg_Count (0);
3922 -- Note: this pragma also has some specific processing in Par.Prag
3923 -- because we want to set the Ada 83 mode switch during parsing.
3925 when Pragma_Ada_95 =>
3929 Check_Arg_Count (0);
3931 ----------------------
3932 -- All_Calls_Remote --
3933 ----------------------
3935 -- pragma All_Calls_Remote [(library_package_NAME)];
3937 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
3938 Lib_Entity : Entity_Id;
3941 Check_Ada_83_Warning;
3942 Check_Valid_Library_Unit_Pragma;
3944 if Nkind (N) = N_Null_Statement then
3948 Lib_Entity := Find_Lib_Unit_Name;
3950 -- This pragma should only apply to a RCI unit (RM E.2.3(23)).
3952 if Present (Lib_Entity)
3953 and then not Debug_Flag_U
3955 if not Is_Remote_Call_Interface (Lib_Entity) then
3956 Error_Pragma ("pragma% only apply to rci unit");
3958 -- Set flag for entity of the library unit
3961 Set_Has_All_Calls_Remote (Lib_Entity);
3965 end All_Calls_Remote;
3971 -- pragma Annotate (IDENTIFIER {, ARG});
3972 -- ARG ::= NAME | EXPRESSION
3974 when Pragma_Annotate => Annotate : begin
3976 Check_At_Least_N_Arguments (1);
3977 Check_Arg_Is_Identifier (Arg1);
3980 Arg : Node_Id := Arg2;
3984 while Present (Arg) loop
3985 Exp := Expression (Arg);
3988 if Is_Entity_Name (Exp) then
3991 elsif Nkind (Exp) = N_String_Literal then
3992 Resolve (Exp, Standard_String);
3994 elsif Is_Overloaded (Exp) then
3995 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
4010 -- pragma Assert (Boolean_EXPRESSION [, static_string_EXPRESSION]);
4012 when Pragma_Assert =>
4014 Check_No_Identifiers;
4016 if Arg_Count > 1 then
4017 Check_Arg_Count (2);
4018 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4021 -- If expansion is active and assertions are inactive, then
4022 -- we rewrite the Assertion as:
4024 -- if False and then condition then
4028 -- The reason we do this rewriting during semantic analysis
4029 -- rather than as part of normal expansion is that we cannot
4030 -- analyze and expand the code for the boolean expression
4031 -- directly, or it may cause insertion of actions that would
4032 -- escape the attempt to suppress the assertion code.
4034 if Expander_Active and not Assertions_Enabled then
4036 Make_If_Statement (Loc,
4039 Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
4040 Right_Opnd => Get_Pragma_Arg (Arg1)),
4041 Then_Statements => New_List (
4042 Make_Null_Statement (Loc))));
4046 -- Otherwise (if assertions are enabled, or if we are not
4047 -- operating with expansion active), then we just analyze
4048 -- and resolve the expression.
4051 Analyze_And_Resolve (Expression (Arg1), Any_Boolean);
4058 -- pragma AST_Entry (entry_IDENTIFIER);
4060 when Pragma_AST_Entry => AST_Entry : declare
4066 Check_Arg_Count (1);
4067 Check_No_Identifiers;
4068 Check_Arg_Is_Local_Name (Arg1);
4069 Ent := Entity (Expression (Arg1));
4071 -- Note: the implementation of the AST_Entry pragma could handle
4072 -- the entry family case fine, but for now we are consistent with
4073 -- the DEC rules, and do not allow the pragma, which of course
4074 -- has the effect of also forbidding the attribute.
4076 if Ekind (Ent) /= E_Entry then
4078 ("pragma% argument must be simple entry name", Arg1);
4080 elsif Is_AST_Entry (Ent) then
4082 ("duplicate % pragma for entry", Arg1);
4084 elsif Has_Homonym (Ent) then
4086 ("pragma% argument cannot specify overloaded entry", Arg1);
4090 FF : constant Entity_Id := First_Formal (Ent);
4093 if Present (FF) then
4094 if Present (Next_Formal (FF)) then
4096 ("entry for pragma% can have only one argument",
4099 elsif Parameter_Mode (FF) /= E_In_Parameter then
4101 ("entry parameter for pragma% must have mode IN",
4107 Set_Is_AST_Entry (Ent);
4115 -- pragma Asynchronous (LOCAL_NAME);
4117 when Pragma_Asynchronous => Asynchronous : declare
4125 procedure Process_Async_Pragma;
4126 -- Common processing for procedure and access-to-procedure case
4128 --------------------------
4129 -- Process_Async_Pragma --
4130 --------------------------
4132 procedure Process_Async_Pragma is
4134 if not Present (L) then
4135 Set_Is_Asynchronous (Nm);
4139 -- The formals should be of mode IN (RM E.4.1(6))
4142 while Present (S) loop
4143 Formal := Defining_Identifier (S);
4145 if Nkind (Formal) = N_Defining_Identifier
4146 and then Ekind (Formal) /= E_In_Parameter
4149 ("pragma% procedure can only have IN parameter",
4156 Set_Is_Asynchronous (Nm);
4157 end Process_Async_Pragma;
4159 -- Start of processing for pragma Asynchronous
4162 Check_Ada_83_Warning;
4163 Check_No_Identifiers;
4164 Check_Arg_Count (1);
4165 Check_Arg_Is_Local_Name (Arg1);
4167 if Debug_Flag_U then
4171 C_Ent := Cunit_Entity (Current_Sem_Unit);
4172 Analyze (Expression (Arg1));
4173 Nm := Entity (Expression (Arg1));
4175 if not Is_Remote_Call_Interface (C_Ent)
4176 and then not Is_Remote_Types (C_Ent)
4178 -- This pragma should only appear in an RCI or Remote Types
4179 -- unit (RM E.4.1(4))
4182 ("pragma% not in Remote_Call_Interface or " &
4183 "Remote_Types unit");
4186 if Ekind (Nm) = E_Procedure
4187 and then Nkind (Parent (Nm)) = N_Procedure_Specification
4189 if not Is_Remote_Call_Interface (Nm) then
4191 ("pragma% cannot be applied on non-remote procedure",
4195 L := Parameter_Specifications (Parent (Nm));
4196 Process_Async_Pragma;
4199 elsif Ekind (Nm) = E_Function then
4201 ("pragma% cannot be applied to function", Arg1);
4203 elsif Ekind (Nm) = E_Record_Type
4204 and then Present (Corresponding_Remote_Type (Nm))
4206 N := Declaration_Node (Corresponding_Remote_Type (Nm));
4208 if Nkind (N) = N_Full_Type_Declaration
4209 and then Nkind (Type_Definition (N)) =
4210 N_Access_Procedure_Definition
4212 L := Parameter_Specifications (Type_Definition (N));
4213 Process_Async_Pragma;
4217 ("pragma% cannot reference access-to-function type",
4221 -- Only other possibility is Access-to-class-wide type
4223 elsif Is_Access_Type (Nm)
4224 and then Is_Class_Wide_Type (Designated_Type (Nm))
4226 Check_First_Subtype (Arg1);
4227 Set_Is_Asynchronous (Nm);
4228 if Expander_Active then
4229 RACW_Type_Is_Asynchronous (Nm);
4233 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
4241 -- pragma Atomic (LOCAL_NAME);
4243 when Pragma_Atomic =>
4244 Process_Atomic_Shared_Volatile;
4246 -----------------------
4247 -- Atomic_Components --
4248 -----------------------
4250 -- pragma Atomic_Components (array_LOCAL_NAME);
4252 -- This processing is shared by Volatile_Components
4254 when Pragma_Atomic_Components |
4255 Pragma_Volatile_Components =>
4257 Atomic_Components : declare
4264 Check_Ada_83_Warning;
4265 Check_No_Identifiers;
4266 Check_Arg_Count (1);
4267 Check_Arg_Is_Local_Name (Arg1);
4268 E_Id := Expression (Arg1);
4270 if Etype (E_Id) = Any_Type then
4276 if Rep_Item_Too_Early (E, N)
4278 Rep_Item_Too_Late (E, N)
4283 D := Declaration_Node (E);
4286 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
4288 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
4289 and then Nkind (D) = N_Object_Declaration
4290 and then Nkind (Object_Definition (D)) =
4291 N_Constrained_Array_Definition)
4293 -- The flag is set on the object, or on the base type
4295 if Nkind (D) /= N_Object_Declaration then
4299 Set_Has_Volatile_Components (E);
4301 if Prag_Id = Pragma_Atomic_Components then
4302 Set_Has_Atomic_Components (E);
4304 if Is_Packed (E) then
4305 Set_Is_Packed (E, False);
4308 ("?Pack canceled, cannot pack atomic components",
4314 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
4316 end Atomic_Components;
4318 --------------------
4319 -- Attach_Handler --
4320 --------------------
4322 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
4324 when Pragma_Attach_Handler =>
4325 Check_Ada_83_Warning;
4326 Check_No_Identifiers;
4327 Check_Arg_Count (2);
4329 if No_Run_Time_Mode then
4330 Error_Msg_CRT ("Attach_Handler pragma", N);
4332 Check_Interrupt_Or_Attach_Handler;
4334 -- The expression that designates the attribute may
4335 -- depend on a discriminant, and is therefore a per-
4336 -- object expression, to be expanded in the init proc.
4337 -- If expansion is enabled, perform semantic checks
4340 if Expander_Active then
4342 Temp : constant Node_Id :=
4343 New_Copy_Tree (Expression (Arg2));
4345 Set_Parent (Temp, N);
4346 Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
4350 Analyze (Expression (Arg2));
4351 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
4354 Process_Interrupt_Or_Attach_Handler;
4357 --------------------
4358 -- C_Pass_By_Copy --
4359 --------------------
4361 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
4363 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
4369 Check_Valid_Configuration_Pragma;
4370 Check_Arg_Count (1);
4371 Check_Optional_Identifier (Arg1, "max_size");
4373 Arg := Expression (Arg1);
4374 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
4376 Val := Expr_Value (Arg);
4380 ("maximum size for pragma% must be positive", Arg1);
4382 elsif UI_Is_In_Int_Range (Val) then
4383 Default_C_Record_Mechanism := UI_To_Int (Val);
4385 -- If a giant value is given, Int'Last will do well enough.
4386 -- If sometime someone complains that a record larger than
4387 -- two gigabytes is not copied, we will worry about it then!
4390 Default_C_Record_Mechanism := Mechanism_Type'Last;
4398 -- pragma Comment (static_string_EXPRESSION)
4400 -- Processing for pragma Comment shares the circuitry for
4401 -- pragma Ident. The only differences are that Ident enforces
4402 -- a limit of 31 characters on its argument, and also enforces
4403 -- limitations on placement for DEC compatibility. Pragma
4404 -- Comment shares neither of these restrictions.
4410 -- pragma Common_Object (
4411 -- [Internal =>] LOCAL_NAME,
4412 -- [, [External =>] EXTERNAL_SYMBOL]
4413 -- [, [Size =>] EXTERNAL_SYMBOL]);
4415 -- Processing for this pragma is shared with Psect_Object
4417 --------------------------
4418 -- Compile_Time_Warning --
4419 --------------------------
4421 -- pragma Compile_Time_Warning
4422 -- (boolean_EXPRESSION, static_string_EXPRESSION);
4424 when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
4425 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
4429 Check_Arg_Count (2);
4430 Check_No_Identifiers;
4431 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4432 Analyze_And_Resolve (Arg1x, Standard_Boolean);
4434 if Compile_Time_Known_Value (Arg1x) then
4435 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
4436 String_To_Name_Buffer (Strval (Get_Pragma_Arg (Arg2)));
4437 Add_Char_To_Name_Buffer ('?');
4440 Msg : String (1 .. Name_Len) :=
4441 Name_Buffer (1 .. Name_Len);
4446 -- This loop looks for multiple lines separated by
4447 -- ASCII.LF and breaks them into continuation error
4448 -- messages marked with the usual back slash.
4451 for S in 2 .. Msg'Length - 1 loop
4452 if Msg (S) = ASCII.LF then
4454 Error_Msg_N (Msg (B .. S), Arg1);
4460 Error_Msg_N (Msg (B .. Msg'Length), Arg1);
4464 end Compile_Time_Warning;
4466 ----------------------------
4467 -- Complex_Representation --
4468 ----------------------------
4470 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
4472 when Pragma_Complex_Representation => Complex_Representation : declare
4479 Check_Arg_Count (1);
4480 Check_Optional_Identifier (Arg1, Name_Entity);
4481 Check_Arg_Is_Local_Name (Arg1);
4482 E_Id := Expression (Arg1);
4484 if Etype (E_Id) = Any_Type then
4490 if not Is_Record_Type (E) then
4492 ("argument for pragma% must be record type", Arg1);
4495 Ent := First_Entity (E);
4498 or else No (Next_Entity (Ent))
4499 or else Present (Next_Entity (Next_Entity (Ent)))
4500 or else not Is_Floating_Point_Type (Etype (Ent))
4501 or else Etype (Ent) /= Etype (Next_Entity (Ent))
4504 ("record for pragma% must have two fields of same fpt type",
4508 Set_Has_Complex_Representation (Base_Type (E));
4510 end Complex_Representation;
4512 -------------------------
4513 -- Component_Alignment --
4514 -------------------------
4516 -- pragma Component_Alignment (
4517 -- [Form =>] ALIGNMENT_CHOICE
4518 -- [, [Name =>] type_LOCAL_NAME]);
4520 -- ALIGNMENT_CHOICE ::=
4522 -- | Component_Size_4
4526 when Pragma_Component_Alignment => Component_AlignmentP : declare
4527 Args : Args_List (1 .. 2);
4528 Names : constant Name_List (1 .. 2) := (
4532 Form : Node_Id renames Args (1);
4533 Name : Node_Id renames Args (2);
4535 Atype : Component_Alignment_Kind;
4540 Gather_Associations (Names, Args);
4543 Error_Pragma ("missing Form argument for pragma%");
4546 Check_Arg_Is_Identifier (Form);
4548 -- Get proper alignment, note that Default = Component_Size
4549 -- on all machines we have so far, and we want to set this
4550 -- value rather than the default value to indicate that it
4551 -- has been explicitly set (and thus will not get overridden
4552 -- by the default component alignment for the current scope)
4554 if Chars (Form) = Name_Component_Size then
4555 Atype := Calign_Component_Size;
4557 elsif Chars (Form) = Name_Component_Size_4 then
4558 Atype := Calign_Component_Size_4;
4560 elsif Chars (Form) = Name_Default then
4561 Atype := Calign_Component_Size;
4563 elsif Chars (Form) = Name_Storage_Unit then
4564 Atype := Calign_Storage_Unit;
4568 ("invalid Form parameter for pragma%", Form);
4571 -- Case with no name, supplied, affects scope table entry
4575 (Scope_Stack.Last).Component_Alignment_Default := Atype;
4577 -- Case of name supplied
4580 Check_Arg_Is_Local_Name (Name);
4582 Typ := Entity (Name);
4585 or else Rep_Item_Too_Early (Typ, N)
4589 Typ := Underlying_Type (Typ);
4592 if not Is_Record_Type (Typ)
4593 and then not Is_Array_Type (Typ)
4596 ("Name parameter of pragma% must identify record or " &
4597 "array type", Name);
4600 -- An explicit Component_Alignment pragma overrides an
4601 -- implicit pragma Pack, but not an explicit one.
4603 if not Has_Pragma_Pack (Base_Type (Typ)) then
4604 Set_Is_Packed (Base_Type (Typ), False);
4605 Set_Component_Alignment (Base_Type (Typ), Atype);
4608 end Component_AlignmentP;
4614 -- pragma Controlled (first_subtype_LOCAL_NAME);
4616 when Pragma_Controlled => Controlled : declare
4620 Check_No_Identifiers;
4621 Check_Arg_Count (1);
4622 Check_Arg_Is_Local_Name (Arg1);
4623 Arg := Expression (Arg1);
4625 if not Is_Entity_Name (Arg)
4626 or else not Is_Access_Type (Entity (Arg))
4628 Error_Pragma_Arg ("pragma% requires access type", Arg1);
4630 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
4638 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
4639 -- [Entity =>] LOCAL_NAME);
4641 when Pragma_Convention => Convention : declare
4645 Check_Ada_83_Warning;
4646 Check_Arg_Count (2);
4647 Process_Convention (C, E);
4650 ---------------------------
4651 -- Convention_Identifier --
4652 ---------------------------
4654 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
4655 -- [Convention =>] convention_IDENTIFIER);
4657 when Pragma_Convention_Identifier => Convention_Identifier : declare
4663 Check_Arg_Count (2);
4664 Check_Optional_Identifier (Arg1, Name_Name);
4665 Check_Optional_Identifier (Arg2, Name_Convention);
4666 Check_Arg_Is_Identifier (Arg1);
4667 Check_Arg_Is_Identifier (Arg1);
4668 Idnam := Chars (Expression (Arg1));
4669 Cname := Chars (Expression (Arg2));
4671 if Is_Convention_Name (Cname) then
4672 Record_Convention_Identifier
4673 (Idnam, Get_Convention_Id (Cname));
4676 ("second arg for % pragma must be convention", Arg2);
4678 end Convention_Identifier;
4684 -- pragma CPP_Class ([Entity =>] local_NAME)
4686 when Pragma_CPP_Class => CPP_Class : declare
4689 Default_DTC : Entity_Id := Empty;
4690 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4696 Check_Arg_Count (1);
4697 Check_Optional_Identifier (Arg1, Name_Entity);
4698 Check_Arg_Is_Local_Name (Arg1);
4700 Arg := Expression (Arg1);
4703 if Etype (Arg) = Any_Type then
4707 if not Is_Entity_Name (Arg)
4708 or else not Is_Type (Entity (Arg))
4710 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
4713 Typ := Entity (Arg);
4715 if not Is_Record_Type (Typ) then
4716 Error_Pragma_Arg ("pragma% applicable to a record, "
4717 & "tagged record or record extension", Arg1);
4720 Default_DTC := First_Component (Typ);
4721 while Present (Default_DTC)
4722 and then Etype (Default_DTC) /= VTP_Type
4724 Next_Component (Default_DTC);
4727 -- Case of non tagged type
4729 if not Is_Tagged_Type (Typ) then
4730 Set_Is_CPP_Class (Typ);
4732 if Present (Default_DTC) then
4734 ("only tagged records can contain vtable pointers", Arg1);
4737 -- Case of tagged type with no vtable ptr
4739 -- What is test for Typ = Root_Typ (Typ) about here ???
4741 elsif Is_Tagged_Type (Typ)
4742 and then Typ = Root_Type (Typ)
4743 and then No (Default_DTC)
4746 ("a cpp_class must contain a vtable pointer", Arg1);
4748 -- Tagged type that has a vtable ptr
4750 elsif Present (Default_DTC) then
4751 Set_Is_CPP_Class (Typ);
4752 Set_Is_Limited_Record (Typ);
4753 Set_Is_Tag (Default_DTC);
4754 Set_DT_Entry_Count (Default_DTC, No_Uint);
4756 -- Since a CPP type has no direct link to its associated tag
4757 -- most tags checks cannot be performed
4759 Set_Kill_Tag_Checks (Typ);
4760 Set_Kill_Tag_Checks (Class_Wide_Type (Typ));
4762 -- Get rid of the _tag component when there was one.
4763 -- It is only useful for regular tagged types
4765 if Expander_Active and then Typ = Root_Type (Typ) then
4767 Tag_C := Tag_Component (Typ);
4768 C := First_Entity (Typ);
4771 Set_First_Entity (Typ, Next_Entity (Tag_C));
4774 while Next_Entity (C) /= Tag_C loop
4778 Set_Next_Entity (C, Next_Entity (Tag_C));
4784 ---------------------
4785 -- CPP_Constructor --
4786 ---------------------
4788 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME);
4790 when Pragma_CPP_Constructor => CPP_Constructor : declare
4796 Check_Arg_Count (1);
4797 Check_Optional_Identifier (Arg1, Name_Entity);
4798 Check_Arg_Is_Local_Name (Arg1);
4800 Id := Expression (Arg1);
4801 Find_Program_Unit_Name (Id);
4803 -- If we did not find the name, we are done
4805 if Etype (Id) = Any_Type then
4809 Def_Id := Entity (Id);
4811 if Ekind (Def_Id) = E_Function
4812 and then Is_Class_Wide_Type (Etype (Def_Id))
4813 and then Is_CPP_Class (Etype (Etype (Def_Id)))
4815 -- What the heck is this??? this pragma allows only 1 arg
4817 if Arg_Count >= 2 then
4818 Check_At_Most_N_Arguments (3);
4819 Process_Interface_Name (Def_Id, Arg2, Arg3);
4822 if No (Parameter_Specifications (Parent (Def_Id))) then
4823 Set_Has_Completion (Def_Id);
4824 Set_Is_Constructor (Def_Id);
4827 ("non-default constructors not implemented", Arg1);
4832 ("pragma% requires function returning a 'C'P'P_Class type",
4835 end CPP_Constructor;
4841 -- pragma CPP_Virtual
4842 -- [Entity =>] LOCAL_NAME
4843 -- [ [Vtable_Ptr =>] LOCAL_NAME,
4844 -- [Position =>] static_integer_EXPRESSION]);
4846 when Pragma_CPP_Virtual => CPP_Virtual : declare
4850 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4857 if Arg_Count = 3 then
4858 Check_Optional_Identifier (Arg2, "vtable_ptr");
4860 -- We allow Entry_Count as well as Position for the third
4861 -- parameter for back compatibility with versions of GNAT
4862 -- before version 3.12. The documentation has always said
4863 -- Position, but the code up to 3.12 said Entry_Count.
4865 if Chars (Arg3) /= Name_Position then
4866 Check_Optional_Identifier (Arg3, "entry_count");
4870 Check_Arg_Count (1);
4873 Check_Optional_Identifier (Arg1, Name_Entity);
4874 Check_Arg_Is_Local_Name (Arg1);
4876 -- First argument must be a subprogram name
4878 Arg := Expression (Arg1);
4879 Find_Program_Unit_Name (Arg);
4881 if Etype (Arg) = Any_Type then
4884 Subp := Entity (Arg);
4887 if not (Is_Subprogram (Subp)
4888 and then Is_Dispatching_Operation (Subp))
4891 ("pragma% must reference a primitive operation", Arg1);
4894 Typ := Find_Dispatching_Type (Subp);
4896 -- If only one Argument defaults are :
4897 -- . DTC_Entity is the default Vtable pointer
4898 -- . DT_Position will be set at the freezing point
4900 if Arg_Count = 1 then
4901 Set_DTC_Entity (Subp, Tag_Component (Typ));
4905 -- Second argument is a component name of type Vtable_Ptr
4907 Arg := Expression (Arg2);
4909 if Nkind (Arg) /= N_Identifier then
4910 Error_Msg_NE ("must be a& component name", Arg, Typ);
4914 DTC := First_Component (Typ);
4915 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
4916 Next_Component (DTC);
4920 Error_Msg_NE ("must be a& component name", Arg, Typ);
4923 elsif Etype (DTC) /= VTP_Type then
4924 Wrong_Type (Arg, VTP_Type);
4928 -- Third argument is an integer (DT_Position)
4930 Arg := Expression (Arg3);
4931 Analyze_And_Resolve (Arg, Any_Integer);
4933 if not Is_Static_Expression (Arg) then
4934 Flag_Non_Static_Expr
4935 ("third argument of pragma CPP_Virtual must be static!",
4940 V := Expr_Value (Expression (Arg3));
4944 ("third argument of pragma% must be positive",
4948 Set_DTC_Entity (Subp, DTC);
4949 Set_DT_Position (Subp, V);
4958 -- pragma CPP_Vtable (
4959 -- [Entity =>] LOCAL_NAME
4960 -- [Vtable_Ptr =>] LOCAL_NAME,
4961 -- [Entry_Count =>] static_integer_EXPRESSION);
4963 when Pragma_CPP_Vtable => CPP_Vtable : declare
4966 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4973 Check_Arg_Count (3);
4974 Check_Optional_Identifier (Arg1, Name_Entity);
4975 Check_Optional_Identifier (Arg2, "vtable_ptr");
4976 Check_Optional_Identifier (Arg3, "entry_count");
4977 Check_Arg_Is_Local_Name (Arg1);
4979 -- First argument is a record type name
4981 Arg := Expression (Arg1);
4984 if Etype (Arg) = Any_Type then
4987 Typ := Entity (Arg);
4990 if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
4991 Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
4994 -- Second argument is a component name of type Vtable_Ptr
4996 Arg := Expression (Arg2);
4998 if Nkind (Arg) /= N_Identifier then
4999 Error_Msg_NE ("must be a& component name", Arg, Typ);
5003 DTC := First_Component (Typ);
5004 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
5005 Next_Component (DTC);
5009 Error_Msg_NE ("must be a& component name", Arg, Typ);
5012 elsif Etype (DTC) /= VTP_Type then
5013 Wrong_Type (DTC, VTP_Type);
5016 -- If it is the first pragma Vtable, This becomes the default tag
5018 elsif (not Is_Tag (DTC))
5019 and then DT_Entry_Count (Tag_Component (Typ)) = No_Uint
5021 Set_Is_Tag (Tag_Component (Typ), False);
5022 Set_Is_Tag (DTC, True);
5023 Set_DT_Entry_Count (DTC, No_Uint);
5026 -- Those pragmas must appear before any primitive operation
5027 -- definition (except inherited ones) otherwise the default
5030 Elmt := First_Elmt (Primitive_Operations (Typ));
5031 while Present (Elmt) loop
5032 if No (Alias (Node (Elmt))) then
5033 Error_Msg_Sloc := Sloc (Node (Elmt));
5035 ("pragma% must appear before this primitive operation");
5041 -- Third argument is an integer (DT_Entry_Count)
5043 Arg := Expression (Arg3);
5044 Analyze_And_Resolve (Arg, Any_Integer);
5046 if not Is_Static_Expression (Arg) then
5047 Flag_Non_Static_Expr
5048 ("entry count for pragma CPP_Vtable must be a static " &
5049 "expression!", Arg3);
5053 V := Expr_Value (Expression (Arg3));
5057 ("entry count for pragma% must be positive", Arg3);
5059 Set_DT_Entry_Count (DTC, V);
5068 -- pragma Debug (PROCEDURE_CALL_STATEMENT);
5070 when Pragma_Debug => Debug : begin
5073 -- If assertions are enabled, and we are expanding code, then
5074 -- we rewrite the pragma with its corresponding procedure call
5075 -- and then analyze the call.
5077 if Assertions_Enabled and Expander_Active then
5078 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5081 -- Otherwise we work a bit to get a tree that makes sense
5082 -- for ASIS purposes, namely a pragma with an analyzed
5083 -- argument that looks like a procedure call.
5086 Expander_Mode_Save_And_Set (False);
5087 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5091 Chars => Name_Debug,
5092 Pragma_Argument_Associations =>
5093 New_List (Relocate_Node (N))));
5094 Expander_Mode_Restore;
5102 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
5104 when Pragma_Discard_Names => Discard_Names : declare
5109 Check_Ada_83_Warning;
5111 -- Deal with configuration pragma case
5113 if Arg_Count = 0 and then Is_Configuration_Pragma then
5114 Global_Discard_Names := True;
5117 -- Otherwise, check correct appropriate context
5120 Check_Is_In_Decl_Part_Or_Package_Spec;
5122 if Arg_Count = 0 then
5124 -- If there is no parameter, then from now on this pragma
5125 -- applies to any enumeration, exception or tagged type
5126 -- defined in the current declarative part.
5128 Set_Discard_Names (Current_Scope);
5132 Check_Arg_Count (1);
5133 Check_Optional_Identifier (Arg1, Name_On);
5134 Check_Arg_Is_Local_Name (Arg1);
5135 E_Id := Expression (Arg1);
5137 if Etype (E_Id) = Any_Type then
5143 if (Is_First_Subtype (E)
5144 and then (Is_Enumeration_Type (E)
5145 or else Is_Tagged_Type (E)))
5146 or else Ekind (E) = E_Exception
5148 Set_Discard_Names (E);
5151 ("inappropriate entity for pragma%", Arg1);
5161 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
5163 when Pragma_Elaborate => Elaborate : declare
5165 Parent_Node : Node_Id;
5170 -- Pragma must be in context items list of a compilation unit
5172 if not Is_List_Member (N) then
5177 Plist := List_Containing (N);
5178 Parent_Node := Parent (Plist);
5180 if Parent_Node = Empty
5181 or else Nkind (Parent_Node) /= N_Compilation_Unit
5182 or else Context_Items (Parent_Node) /= Plist
5189 -- Must be at least one argument
5191 if Arg_Count = 0 then
5192 Error_Pragma ("pragma% requires at least one argument");
5195 -- In Ada 83 mode, there can be no items following it in the
5196 -- context list except other pragmas and implicit with clauses
5197 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
5198 -- placement rule does not apply.
5200 if Ada_83 and then Comes_From_Source (N) then
5203 while Present (Citem) loop
5204 if Nkind (Citem) = N_Pragma
5205 or else (Nkind (Citem) = N_With_Clause
5206 and then Implicit_With (Citem))
5211 ("(Ada 83) pragma% must be at end of context clause");
5218 -- Finally, the arguments must all be units mentioned in a with
5219 -- clause in the same context clause. Note we already checked
5220 -- (in Par.Prag) that the arguments are either identifiers or
5223 Outer : while Present (Arg) loop
5224 Citem := First (Plist);
5226 Inner : while Citem /= N loop
5227 if Nkind (Citem) = N_With_Clause
5228 and then Same_Name (Name (Citem), Expression (Arg))
5230 Set_Elaborate_Present (Citem, True);
5231 Set_Unit_Name (Expression (Arg), Name (Citem));
5232 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5241 ("argument of pragma% is not with'ed unit", Arg);
5247 -- Give a warning if operating in static mode with -gnatwl
5248 -- (elaboration warnings eanbled) switch set.
5250 if Elab_Warnings and not Dynamic_Elaboration_Checks then
5252 ("?use of pragma Elaborate may not be safe", N);
5254 ("?use pragma Elaborate_All instead if possible", N);
5262 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
5264 when Pragma_Elaborate_All => Elaborate_All : declare
5266 Parent_Node : Node_Id;
5271 Check_Ada_83_Warning;
5273 -- Pragma must be in context items list of a compilation unit
5275 if not Is_List_Member (N) then
5280 Plist := List_Containing (N);
5281 Parent_Node := Parent (Plist);
5283 if Parent_Node = Empty
5284 or else Nkind (Parent_Node) /= N_Compilation_Unit
5285 or else Context_Items (Parent_Node) /= Plist
5292 -- Must be at least one argument
5294 if Arg_Count = 0 then
5295 Error_Pragma ("pragma% requires at least one argument");
5298 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
5299 -- have to appear at the end of the context clause, but may
5300 -- appear mixed in with other items, even in Ada 83 mode.
5302 -- Final check: the arguments must all be units mentioned in
5303 -- a with clause in the same context clause. Note that we
5304 -- already checked (in Par.Prag) that all the arguments are
5305 -- either identifiers or selected components.
5308 Outr : while Present (Arg) loop
5309 Citem := First (Plist);
5311 Innr : while Citem /= N loop
5312 if Nkind (Citem) = N_With_Clause
5313 and then Same_Name (Name (Citem), Expression (Arg))
5315 Set_Elaborate_All_Present (Citem, True);
5316 Set_Unit_Name (Expression (Arg), Name (Citem));
5317 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5325 Set_Error_Posted (N);
5327 ("argument of pragma% is not with'ed unit", Arg);
5334 --------------------
5335 -- Elaborate_Body --
5336 --------------------
5338 -- pragma Elaborate_Body [( library_unit_NAME )];
5340 when Pragma_Elaborate_Body => Elaborate_Body : declare
5341 Cunit_Node : Node_Id;
5342 Cunit_Ent : Entity_Id;
5345 Check_Ada_83_Warning;
5346 Check_Valid_Library_Unit_Pragma;
5348 if Nkind (N) = N_Null_Statement then
5352 Cunit_Node := Cunit (Current_Sem_Unit);
5353 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
5355 if Nkind (Unit (Cunit_Node)) = N_Package_Body
5357 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
5359 Error_Pragma ("pragma% must refer to a spec, not a body");
5361 Set_Body_Required (Cunit_Node, True);
5362 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
5364 -- If we are in dynamic elaboration mode, then we suppress
5365 -- elaboration warnings for the unit, since it is definitely
5366 -- fine NOT to do dynamic checks at the first level (and such
5367 -- checks will be suppressed because no elaboration boolean
5368 -- is created for Elaborate_Body packages).
5370 -- But in the static model of elaboration, Elaborate_Body is
5371 -- definitely NOT good enough to ensure elaboration safety on
5372 -- its own, since the body may WITH other units that are not
5373 -- safe from an elaboration point of view, so a client must
5374 -- still do an Elaborate_All on such units.
5376 -- Debug flag -gnatdD restores the old behavior of 3.13,
5377 -- where Elaborate_Body always suppressed elab warnings.
5379 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
5380 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
5385 ------------------------
5386 -- Elaboration_Checks --
5387 ------------------------
5389 -- pragma Elaboration_Checks (Static | Dynamic);
5391 when Pragma_Elaboration_Checks =>
5393 Check_Arg_Count (1);
5394 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
5395 Dynamic_Elaboration_Checks :=
5396 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
5402 -- pragma Eliminate (
5403 -- [Unit_Name =>] IDENTIFIER |
5404 -- SELECTED_COMPONENT
5405 -- [,[Entity =>] IDENTIFIER |
5406 -- SELECTED_COMPONENT |
5408 -- [,[Parameter_Types =>] PARAMETER_TYPES]
5409 -- [,[Result_Type =>] result_SUBTYPE_NAME]
5410 -- [,[Homonym_Number =>] INTEGER_LITERAL]);
5412 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
5413 -- SUBTYPE_NAME ::= STRING_LITERAL
5415 when Pragma_Eliminate => Eliminate : declare
5416 Args : Args_List (1 .. 5);
5417 Names : constant Name_List (1 .. 5) := (
5420 Name_Parameter_Types,
5422 Name_Homonym_Number);
5424 Unit_Name : Node_Id renames Args (1);
5425 Entity : Node_Id renames Args (2);
5426 Parameter_Types : Node_Id renames Args (3);
5427 Result_Type : Node_Id renames Args (4);
5428 Homonym_Number : Node_Id renames Args (5);
5432 Check_Valid_Configuration_Pragma;
5433 Gather_Associations (Names, Args);
5435 if No (Unit_Name) then
5436 Error_Pragma ("missing Unit_Name argument for pragma%");
5440 and then (Present (Parameter_Types)
5442 Present (Result_Type)
5444 Present (Homonym_Number))
5446 Error_Pragma ("missing Entity argument for pragma%");
5449 Process_Eliminate_Pragma
5458 --------------------------
5459 -- Explicit_Overriding --
5460 --------------------------
5462 when Pragma_Explicit_Overriding =>
5463 Check_Valid_Configuration_Pragma;
5464 Check_Arg_Count (0);
5465 Explicit_Overriding := True;
5472 -- [ Convention =>] convention_IDENTIFIER,
5473 -- [ Entity =>] local_NAME
5474 -- [, [External_Name =>] static_string_EXPRESSION ]
5475 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5477 when Pragma_Export => Export : declare
5482 Check_Ada_83_Warning;
5483 Check_At_Least_N_Arguments (2);
5484 Check_At_Most_N_Arguments (4);
5485 Process_Convention (C, Def_Id);
5487 if Ekind (Def_Id) /= E_Constant then
5488 Note_Possible_Modification (Expression (Arg2));
5491 Process_Interface_Name (Def_Id, Arg3, Arg4);
5492 Set_Exported (Def_Id, Arg2);
5495 ----------------------
5496 -- Export_Exception --
5497 ----------------------
5499 -- pragma Export_Exception (
5500 -- [Internal =>] LOCAL_NAME,
5501 -- [, [External =>] EXTERNAL_SYMBOL,]
5502 -- [, [Form =>] Ada | VMS]
5503 -- [, [Code =>] static_integer_EXPRESSION]);
5505 when Pragma_Export_Exception => Export_Exception : declare
5506 Args : Args_List (1 .. 4);
5507 Names : constant Name_List (1 .. 4) := (
5513 Internal : Node_Id renames Args (1);
5514 External : Node_Id renames Args (2);
5515 Form : Node_Id renames Args (3);
5516 Code : Node_Id renames Args (4);
5519 if Inside_A_Generic then
5520 Error_Pragma ("pragma% cannot be used for generic entities");
5523 Gather_Associations (Names, Args);
5524 Process_Extended_Import_Export_Exception_Pragma (
5525 Arg_Internal => Internal,
5526 Arg_External => External,
5530 if not Is_VMS_Exception (Entity (Internal)) then
5531 Set_Exported (Entity (Internal), Internal);
5533 end Export_Exception;
5535 ---------------------
5536 -- Export_Function --
5537 ---------------------
5539 -- pragma Export_Function (
5540 -- [Internal =>] LOCAL_NAME,
5541 -- [, [External =>] EXTERNAL_SYMBOL,]
5542 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5543 -- [, [Result_Type =>] TYPE_DESIGNATOR]
5544 -- [, [Mechanism =>] MECHANISM]
5545 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
5547 -- EXTERNAL_SYMBOL ::=
5549 -- | static_string_EXPRESSION
5551 -- PARAMETER_TYPES ::=
5553 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5555 -- TYPE_DESIGNATOR ::=
5557 -- | subtype_Name ' Access
5561 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5563 -- MECHANISM_ASSOCIATION ::=
5564 -- [formal_parameter_NAME =>] MECHANISM_NAME
5566 -- MECHANISM_NAME ::=
5569 -- | Descriptor [([Class =>] CLASS_NAME)]
5571 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5573 when Pragma_Export_Function => Export_Function : declare
5574 Args : Args_List (1 .. 6);
5575 Names : constant Name_List (1 .. 6) := (
5578 Name_Parameter_Types,
5581 Name_Result_Mechanism);
5583 Internal : Node_Id renames Args (1);
5584 External : Node_Id renames Args (2);
5585 Parameter_Types : Node_Id renames Args (3);
5586 Result_Type : Node_Id renames Args (4);
5587 Mechanism : Node_Id renames Args (5);
5588 Result_Mechanism : Node_Id renames Args (6);
5592 Gather_Associations (Names, Args);
5593 Process_Extended_Import_Export_Subprogram_Pragma (
5594 Arg_Internal => Internal,
5595 Arg_External => External,
5596 Arg_Parameter_Types => Parameter_Types,
5597 Arg_Result_Type => Result_Type,
5598 Arg_Mechanism => Mechanism,
5599 Arg_Result_Mechanism => Result_Mechanism);
5600 end Export_Function;
5606 -- pragma Export_Object (
5607 -- [Internal =>] LOCAL_NAME,
5608 -- [, [External =>] EXTERNAL_SYMBOL]
5609 -- [, [Size =>] EXTERNAL_SYMBOL]);
5611 -- EXTERNAL_SYMBOL ::=
5613 -- | static_string_EXPRESSION
5615 -- PARAMETER_TYPES ::=
5617 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5619 -- TYPE_DESIGNATOR ::=
5621 -- | subtype_Name ' Access
5625 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5627 -- MECHANISM_ASSOCIATION ::=
5628 -- [formal_parameter_NAME =>] MECHANISM_NAME
5630 -- MECHANISM_NAME ::=
5633 -- | Descriptor [([Class =>] CLASS_NAME)]
5635 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5637 when Pragma_Export_Object => Export_Object : declare
5638 Args : Args_List (1 .. 3);
5639 Names : constant Name_List (1 .. 3) := (
5644 Internal : Node_Id renames Args (1);
5645 External : Node_Id renames Args (2);
5646 Size : Node_Id renames Args (3);
5650 Gather_Associations (Names, Args);
5651 Process_Extended_Import_Export_Object_Pragma (
5652 Arg_Internal => Internal,
5653 Arg_External => External,
5657 ----------------------
5658 -- Export_Procedure --
5659 ----------------------
5661 -- pragma Export_Procedure (
5662 -- [Internal =>] LOCAL_NAME,
5663 -- [, [External =>] EXTERNAL_SYMBOL,]
5664 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5665 -- [, [Mechanism =>] MECHANISM]);
5667 -- EXTERNAL_SYMBOL ::=
5669 -- | static_string_EXPRESSION
5671 -- PARAMETER_TYPES ::=
5673 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5675 -- TYPE_DESIGNATOR ::=
5677 -- | subtype_Name ' Access
5681 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5683 -- MECHANISM_ASSOCIATION ::=
5684 -- [formal_parameter_NAME =>] MECHANISM_NAME
5686 -- MECHANISM_NAME ::=
5689 -- | Descriptor [([Class =>] CLASS_NAME)]
5691 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5693 when Pragma_Export_Procedure => Export_Procedure : declare
5694 Args : Args_List (1 .. 4);
5695 Names : constant Name_List (1 .. 4) := (
5698 Name_Parameter_Types,
5701 Internal : Node_Id renames Args (1);
5702 External : Node_Id renames Args (2);
5703 Parameter_Types : Node_Id renames Args (3);
5704 Mechanism : Node_Id renames Args (4);
5708 Gather_Associations (Names, Args);
5709 Process_Extended_Import_Export_Subprogram_Pragma (
5710 Arg_Internal => Internal,
5711 Arg_External => External,
5712 Arg_Parameter_Types => Parameter_Types,
5713 Arg_Mechanism => Mechanism);
5714 end Export_Procedure;
5720 -- pragma Export_Value (
5721 -- [Value =>] static_integer_EXPRESSION,
5722 -- [Link_Name =>] static_string_EXPRESSION);
5724 when Pragma_Export_Value =>
5726 Check_Arg_Count (2);
5728 Check_Optional_Identifier (Arg1, Name_Value);
5729 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
5731 Check_Optional_Identifier (Arg2, Name_Link_Name);
5732 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
5734 -----------------------------
5735 -- Export_Valued_Procedure --
5736 -----------------------------
5738 -- pragma Export_Valued_Procedure (
5739 -- [Internal =>] LOCAL_NAME,
5740 -- [, [External =>] EXTERNAL_SYMBOL,]
5741 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5742 -- [, [Mechanism =>] MECHANISM]);
5744 -- EXTERNAL_SYMBOL ::=
5746 -- | static_string_EXPRESSION
5748 -- PARAMETER_TYPES ::=
5750 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5752 -- TYPE_DESIGNATOR ::=
5754 -- | subtype_Name ' Access
5758 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5760 -- MECHANISM_ASSOCIATION ::=
5761 -- [formal_parameter_NAME =>] MECHANISM_NAME
5763 -- MECHANISM_NAME ::=
5766 -- | Descriptor [([Class =>] CLASS_NAME)]
5768 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5770 when Pragma_Export_Valued_Procedure =>
5771 Export_Valued_Procedure : declare
5772 Args : Args_List (1 .. 4);
5773 Names : constant Name_List (1 .. 4) := (
5776 Name_Parameter_Types,
5779 Internal : Node_Id renames Args (1);
5780 External : Node_Id renames Args (2);
5781 Parameter_Types : Node_Id renames Args (3);
5782 Mechanism : Node_Id renames Args (4);
5786 Gather_Associations (Names, Args);
5787 Process_Extended_Import_Export_Subprogram_Pragma (
5788 Arg_Internal => Internal,
5789 Arg_External => External,
5790 Arg_Parameter_Types => Parameter_Types,
5791 Arg_Mechanism => Mechanism);
5792 end Export_Valued_Procedure;
5798 -- pragma Extend_System ([Name =>] Identifier);
5800 when Pragma_Extend_System => Extend_System : declare
5803 Check_Valid_Configuration_Pragma;
5804 Check_Arg_Count (1);
5805 Check_Optional_Identifier (Arg1, Name_Name);
5806 Check_Arg_Is_Identifier (Arg1);
5808 Get_Name_String (Chars (Expression (Arg1)));
5811 and then Name_Buffer (1 .. 4) = "aux_"
5813 if Present (System_Extend_Pragma_Arg) then
5814 if Chars (Expression (Arg1)) =
5815 Chars (Expression (System_Extend_Pragma_Arg))
5819 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
5820 Error_Pragma ("pragma% conflicts with that at#");
5824 System_Extend_Pragma_Arg := Arg1;
5826 if not GNAT_Mode then
5827 System_Extend_Unit := Arg1;
5831 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
5835 ------------------------
5836 -- Extensions_Allowed --
5837 ------------------------
5839 -- pragma Extensions_Allowed (ON | OFF);
5841 when Pragma_Extensions_Allowed =>
5843 Check_Arg_Count (1);
5844 Check_No_Identifiers;
5845 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5846 Extensions_Allowed := (Chars (Expression (Arg1)) = Name_On);
5852 -- pragma External (
5853 -- [ Convention =>] convention_IDENTIFIER,
5854 -- [ Entity =>] local_NAME
5855 -- [, [External_Name =>] static_string_EXPRESSION ]
5856 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5858 when Pragma_External => External : declare
5864 Check_At_Least_N_Arguments (2);
5865 Check_At_Most_N_Arguments (4);
5866 Process_Convention (C, Def_Id);
5867 Note_Possible_Modification (Expression (Arg2));
5868 Process_Interface_Name (Def_Id, Arg3, Arg4);
5869 Set_Exported (Def_Id, Arg2);
5872 --------------------------
5873 -- External_Name_Casing --
5874 --------------------------
5876 -- pragma External_Name_Casing (
5877 -- UPPERCASE | LOWERCASE
5878 -- [, AS_IS | UPPERCASE | LOWERCASE]);
5880 when Pragma_External_Name_Casing =>
5882 External_Name_Casing : declare
5885 Check_No_Identifiers;
5887 if Arg_Count = 2 then
5889 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
5891 case Chars (Get_Pragma_Arg (Arg2)) is
5893 Opt.External_Name_Exp_Casing := As_Is;
5895 when Name_Uppercase =>
5896 Opt.External_Name_Exp_Casing := Uppercase;
5898 when Name_Lowercase =>
5899 Opt.External_Name_Exp_Casing := Lowercase;
5906 Check_Arg_Count (1);
5909 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
5911 case Chars (Get_Pragma_Arg (Arg1)) is
5912 when Name_Uppercase =>
5913 Opt.External_Name_Imp_Casing := Uppercase;
5915 when Name_Lowercase =>
5916 Opt.External_Name_Imp_Casing := Lowercase;
5921 end External_Name_Casing;
5923 ---------------------------
5924 -- Finalize_Storage_Only --
5925 ---------------------------
5927 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
5929 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
5930 Assoc : constant Node_Id := Arg1;
5931 Type_Id : constant Node_Id := Expression (Assoc);
5935 Check_No_Identifiers;
5936 Check_Arg_Count (1);
5937 Check_Arg_Is_Local_Name (Arg1);
5939 Find_Type (Type_Id);
5940 Typ := Entity (Type_Id);
5943 or else Rep_Item_Too_Early (Typ, N)
5947 Typ := Underlying_Type (Typ);
5950 if not Is_Controlled (Typ) then
5951 Error_Pragma ("pragma% must specify controlled type");
5954 Check_First_Subtype (Arg1);
5956 if Finalize_Storage_Only (Typ) then
5957 Error_Pragma ("duplicate pragma%, only one allowed");
5959 elsif not Rep_Item_Too_Late (Typ, N) then
5960 Set_Finalize_Storage_Only (Base_Type (Typ), True);
5962 end Finalize_Storage;
5964 --------------------------
5965 -- Float_Representation --
5966 --------------------------
5968 -- pragma Float_Representation (VAX_Float | IEEE_Float);
5970 when Pragma_Float_Representation => Float_Representation : declare
5978 if Arg_Count = 1 then
5979 Check_Valid_Configuration_Pragma;
5981 Check_Arg_Count (2);
5982 Check_Optional_Identifier (Arg2, Name_Entity);
5983 Check_Arg_Is_Local_Name (Arg2);
5986 Check_No_Identifier (Arg1);
5987 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
5989 if not OpenVMS_On_Target then
5990 if Chars (Expression (Arg1)) = Name_VAX_Float then
5992 ("?pragma% ignored (applies only to Open'V'M'S)");
5998 -- One argument case
6000 if Arg_Count = 1 then
6002 if Chars (Expression (Arg1)) = Name_VAX_Float then
6004 if Opt.Float_Format = 'I' then
6005 Error_Pragma ("'I'E'E'E format previously specified");
6008 Opt.Float_Format := 'V';
6011 if Opt.Float_Format = 'V' then
6012 Error_Pragma ("'V'A'X format previously specified");
6015 Opt.Float_Format := 'I';
6018 Set_Standard_Fpt_Formats;
6020 -- Two argument case
6023 Argx := Get_Pragma_Arg (Arg2);
6025 if not Is_Entity_Name (Argx)
6026 or else not Is_Floating_Point_Type (Entity (Argx))
6029 ("second argument of% pragma must be floating-point type",
6033 Ent := Entity (Argx);
6034 Digs := UI_To_Int (Digits_Value (Ent));
6036 -- Two arguments, VAX_Float case
6038 if Chars (Expression (Arg1)) = Name_VAX_Float then
6041 when 6 => Set_F_Float (Ent);
6042 when 9 => Set_D_Float (Ent);
6043 when 15 => Set_G_Float (Ent);
6047 ("wrong digits value, must be 6,9 or 15", Arg2);
6050 -- Two arguments, IEEE_Float case
6054 when 6 => Set_IEEE_Short (Ent);
6055 when 15 => Set_IEEE_Long (Ent);
6059 ("wrong digits value, must be 6 or 15", Arg2);
6063 end Float_Representation;
6069 -- pragma Ident (static_string_EXPRESSION)
6071 -- Note: pragma Comment shares this processing. Pragma Comment
6072 -- is identical to Ident, except that the restriction of the
6073 -- argument to 31 characters and the placement restrictions
6074 -- are not enforced for pragma Comment.
6076 when Pragma_Ident | Pragma_Comment => Ident : declare
6081 Check_Arg_Count (1);
6082 Check_No_Identifiers;
6083 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
6085 -- For pragma Ident, preserve DEC compatibility by requiring
6086 -- the pragma to appear in a declarative part or package spec.
6088 if Prag_Id = Pragma_Ident then
6089 Check_Is_In_Decl_Part_Or_Package_Spec;
6092 Str := Expr_Value_S (Expression (Arg1));
6099 GP := Parent (Parent (N));
6101 if Nkind (GP) = N_Package_Declaration
6103 Nkind (GP) = N_Generic_Package_Declaration
6108 -- If we have a compilation unit, then record the ident
6109 -- value, checking for improper duplication.
6111 if Nkind (GP) = N_Compilation_Unit then
6112 CS := Ident_String (Current_Sem_Unit);
6114 if Present (CS) then
6116 -- For Ident, we do not permit multiple instances
6118 if Prag_Id = Pragma_Ident then
6119 Error_Pragma ("duplicate% pragma not permitted");
6121 -- For Comment, we concatenate the string, unless we
6122 -- want to preserve the tree structure for ASIS.
6124 elsif not ASIS_Mode then
6125 Start_String (Strval (CS));
6126 Store_String_Char (' ');
6127 Store_String_Chars (Strval (Str));
6128 Set_Strval (CS, End_String);
6132 -- In VMS, the effect of IDENT is achieved by passing
6133 -- IDENTIFICATION=name as a --for-linker switch.
6135 if OpenVMS_On_Target then
6138 ("--for-linker=IDENTIFICATION=");
6139 String_To_Name_Buffer (Strval (Str));
6140 Store_String_Chars (Name_Buffer (1 .. Name_Len));
6142 -- Only the last processed IDENT is saved. The main
6143 -- purpose is so an IDENT associated with a main
6144 -- procedure will be used in preference to an IDENT
6145 -- associated with a with'd package.
6147 Replace_Linker_Option_String
6148 (End_String, "--for-linker=IDENTIFICATION=");
6151 Set_Ident_String (Current_Sem_Unit, Str);
6154 -- For subunits, we just ignore the Ident, since in GNAT
6155 -- these are not separate object files, and hence not
6156 -- separate units in the unit table.
6158 elsif Nkind (GP) = N_Subunit then
6161 -- Otherwise we have a misplaced pragma Ident, but we ignore
6162 -- this if we are in an instantiation, since it comes from
6163 -- a generic, and has no relevance to the instantiation.
6165 elsif Prag_Id = Pragma_Ident then
6166 if Instantiation_Location (Loc) = No_Location then
6167 Error_Pragma ("pragma% only allowed at outer level");
6178 -- [ Convention =>] convention_IDENTIFIER,
6179 -- [ Entity =>] local_NAME
6180 -- [, [External_Name =>] static_string_EXPRESSION ]
6181 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6183 when Pragma_Import =>
6184 Check_Ada_83_Warning;
6185 Check_At_Least_N_Arguments (2);
6186 Check_At_Most_N_Arguments (4);
6187 Process_Import_Or_Interface;
6189 ----------------------
6190 -- Import_Exception --
6191 ----------------------
6193 -- pragma Import_Exception (
6194 -- [Internal =>] LOCAL_NAME,
6195 -- [, [External =>] EXTERNAL_SYMBOL,]
6196 -- [, [Form =>] Ada | VMS]
6197 -- [, [Code =>] static_integer_EXPRESSION]);
6199 when Pragma_Import_Exception => Import_Exception : declare
6200 Args : Args_List (1 .. 4);
6201 Names : constant Name_List (1 .. 4) := (
6207 Internal : Node_Id renames Args (1);
6208 External : Node_Id renames Args (2);
6209 Form : Node_Id renames Args (3);
6210 Code : Node_Id renames Args (4);
6213 Gather_Associations (Names, Args);
6215 if Present (External) and then Present (Code) then
6217 ("cannot give both External and Code options for pragma%");
6220 Process_Extended_Import_Export_Exception_Pragma (
6221 Arg_Internal => Internal,
6222 Arg_External => External,
6226 if not Is_VMS_Exception (Entity (Internal)) then
6227 Set_Imported (Entity (Internal));
6229 end Import_Exception;
6231 ---------------------
6232 -- Import_Function --
6233 ---------------------
6235 -- pragma Import_Function (
6236 -- [Internal =>] LOCAL_NAME,
6237 -- [, [External =>] EXTERNAL_SYMBOL]
6238 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6239 -- [, [Result_Type =>] SUBTYPE_MARK]
6240 -- [, [Mechanism =>] MECHANISM]
6241 -- [, [Result_Mechanism =>] MECHANISM_NAME]
6242 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6244 -- EXTERNAL_SYMBOL ::=
6246 -- | static_string_EXPRESSION
6248 -- PARAMETER_TYPES ::=
6250 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6252 -- TYPE_DESIGNATOR ::=
6254 -- | subtype_Name ' Access
6258 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6260 -- MECHANISM_ASSOCIATION ::=
6261 -- [formal_parameter_NAME =>] MECHANISM_NAME
6263 -- MECHANISM_NAME ::=
6266 -- | Descriptor [([Class =>] CLASS_NAME)]
6268 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6270 when Pragma_Import_Function => Import_Function : declare
6271 Args : Args_List (1 .. 7);
6272 Names : constant Name_List (1 .. 7) := (
6275 Name_Parameter_Types,
6278 Name_Result_Mechanism,
6279 Name_First_Optional_Parameter);
6281 Internal : Node_Id renames Args (1);
6282 External : Node_Id renames Args (2);
6283 Parameter_Types : Node_Id renames Args (3);
6284 Result_Type : Node_Id renames Args (4);
6285 Mechanism : Node_Id renames Args (5);
6286 Result_Mechanism : Node_Id renames Args (6);
6287 First_Optional_Parameter : Node_Id renames Args (7);
6291 Gather_Associations (Names, Args);
6292 Process_Extended_Import_Export_Subprogram_Pragma (
6293 Arg_Internal => Internal,
6294 Arg_External => External,
6295 Arg_Parameter_Types => Parameter_Types,
6296 Arg_Result_Type => Result_Type,
6297 Arg_Mechanism => Mechanism,
6298 Arg_Result_Mechanism => Result_Mechanism,
6299 Arg_First_Optional_Parameter => First_Optional_Parameter);
6300 end Import_Function;
6306 -- pragma Import_Object (
6307 -- [Internal =>] LOCAL_NAME,
6308 -- [, [External =>] EXTERNAL_SYMBOL]
6309 -- [, [Size =>] EXTERNAL_SYMBOL]);
6311 -- EXTERNAL_SYMBOL ::=
6313 -- | static_string_EXPRESSION
6315 when Pragma_Import_Object => Import_Object : declare
6316 Args : Args_List (1 .. 3);
6317 Names : constant Name_List (1 .. 3) := (
6322 Internal : Node_Id renames Args (1);
6323 External : Node_Id renames Args (2);
6324 Size : Node_Id renames Args (3);
6328 Gather_Associations (Names, Args);
6329 Process_Extended_Import_Export_Object_Pragma (
6330 Arg_Internal => Internal,
6331 Arg_External => External,
6335 ----------------------
6336 -- Import_Procedure --
6337 ----------------------
6339 -- pragma Import_Procedure (
6340 -- [Internal =>] LOCAL_NAME,
6341 -- [, [External =>] EXTERNAL_SYMBOL]
6342 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6343 -- [, [Mechanism =>] MECHANISM]
6344 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6346 -- EXTERNAL_SYMBOL ::=
6348 -- | static_string_EXPRESSION
6350 -- PARAMETER_TYPES ::=
6352 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6354 -- TYPE_DESIGNATOR ::=
6356 -- | subtype_Name ' Access
6360 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6362 -- MECHANISM_ASSOCIATION ::=
6363 -- [formal_parameter_NAME =>] MECHANISM_NAME
6365 -- MECHANISM_NAME ::=
6368 -- | Descriptor [([Class =>] CLASS_NAME)]
6370 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6372 when Pragma_Import_Procedure => Import_Procedure : declare
6373 Args : Args_List (1 .. 5);
6374 Names : constant Name_List (1 .. 5) := (
6377 Name_Parameter_Types,
6379 Name_First_Optional_Parameter);
6381 Internal : Node_Id renames Args (1);
6382 External : Node_Id renames Args (2);
6383 Parameter_Types : Node_Id renames Args (3);
6384 Mechanism : Node_Id renames Args (4);
6385 First_Optional_Parameter : Node_Id renames Args (5);
6389 Gather_Associations (Names, Args);
6390 Process_Extended_Import_Export_Subprogram_Pragma (
6391 Arg_Internal => Internal,
6392 Arg_External => External,
6393 Arg_Parameter_Types => Parameter_Types,
6394 Arg_Mechanism => Mechanism,
6395 Arg_First_Optional_Parameter => First_Optional_Parameter);
6396 end Import_Procedure;
6398 -----------------------------
6399 -- Import_Valued_Procedure --
6400 -----------------------------
6402 -- pragma Import_Valued_Procedure (
6403 -- [Internal =>] LOCAL_NAME,
6404 -- [, [External =>] EXTERNAL_SYMBOL]
6405 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6406 -- [, [Mechanism =>] MECHANISM]
6407 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6409 -- EXTERNAL_SYMBOL ::=
6411 -- | static_string_EXPRESSION
6413 -- PARAMETER_TYPES ::=
6415 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6417 -- TYPE_DESIGNATOR ::=
6419 -- | subtype_Name ' Access
6423 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6425 -- MECHANISM_ASSOCIATION ::=
6426 -- [formal_parameter_NAME =>] MECHANISM_NAME
6428 -- MECHANISM_NAME ::=
6431 -- | Descriptor [([Class =>] CLASS_NAME)]
6433 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6435 when Pragma_Import_Valued_Procedure =>
6436 Import_Valued_Procedure : declare
6437 Args : Args_List (1 .. 5);
6438 Names : constant Name_List (1 .. 5) := (
6441 Name_Parameter_Types,
6443 Name_First_Optional_Parameter);
6445 Internal : Node_Id renames Args (1);
6446 External : Node_Id renames Args (2);
6447 Parameter_Types : Node_Id renames Args (3);
6448 Mechanism : Node_Id renames Args (4);
6449 First_Optional_Parameter : Node_Id renames Args (5);
6453 Gather_Associations (Names, Args);
6454 Process_Extended_Import_Export_Subprogram_Pragma (
6455 Arg_Internal => Internal,
6456 Arg_External => External,
6457 Arg_Parameter_Types => Parameter_Types,
6458 Arg_Mechanism => Mechanism,
6459 Arg_First_Optional_Parameter => First_Optional_Parameter);
6460 end Import_Valued_Procedure;
6462 ------------------------
6463 -- Initialize_Scalars --
6464 ------------------------
6466 -- pragma Initialize_Scalars;
6468 when Pragma_Initialize_Scalars =>
6470 Check_Arg_Count (0);
6471 Check_Valid_Configuration_Pragma;
6472 Check_Restriction (No_Initialize_Scalars, N);
6474 if not Restriction_Active (No_Initialize_Scalars) then
6475 Init_Or_Norm_Scalars := True;
6476 Initialize_Scalars := True;
6483 -- pragma Inline ( NAME {, NAME} );
6485 when Pragma_Inline =>
6487 -- Pragma is active if inlining option is active
6489 if Inline_Active then
6490 Process_Inline (True);
6492 -- Pragma is active in a predefined file in config run time mode
6494 elsif Configurable_Run_Time_Mode
6496 Is_Predefined_File_Name (Unit_File_Name (Current_Sem_Unit))
6498 Process_Inline (True);
6500 -- Otherwise inlining is not active
6503 Process_Inline (False);
6510 -- pragma Inline_Always ( NAME {, NAME} );
6512 when Pragma_Inline_Always =>
6513 Process_Inline (True);
6515 --------------------
6516 -- Inline_Generic --
6517 --------------------
6519 -- pragma Inline_Generic (NAME {, NAME});
6521 when Pragma_Inline_Generic =>
6522 Process_Generic_List;
6524 ----------------------
6525 -- Inspection_Point --
6526 ----------------------
6528 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
6530 when Pragma_Inspection_Point => Inspection_Point : declare
6535 if Arg_Count > 0 then
6538 Exp := Expression (Arg);
6541 if not Is_Entity_Name (Exp)
6542 or else not Is_Object (Entity (Exp))
6544 Error_Pragma_Arg ("object name required", Arg);
6551 end Inspection_Point;
6557 -- pragma Interface (
6558 -- convention_IDENTIFIER,
6561 when Pragma_Interface =>
6563 Check_Arg_Count (2);
6564 Check_No_Identifiers;
6565 Process_Import_Or_Interface;
6567 --------------------
6568 -- Interface_Name --
6569 --------------------
6571 -- pragma Interface_Name (
6572 -- [ Entity =>] local_NAME
6573 -- [,[External_Name =>] static_string_EXPRESSION ]
6574 -- [,[Link_Name =>] static_string_EXPRESSION ]);
6576 when Pragma_Interface_Name => Interface_Name : declare
6584 Check_At_Least_N_Arguments (2);
6585 Check_At_Most_N_Arguments (3);
6586 Id := Expression (Arg1);
6589 if not Is_Entity_Name (Id) then
6591 ("first argument for pragma% must be entity name", Arg1);
6592 elsif Etype (Id) = Any_Type then
6595 Def_Id := Entity (Id);
6598 -- Special DEC-compatible processing for the object case,
6599 -- forces object to be imported.
6601 if Ekind (Def_Id) = E_Variable then
6602 Kill_Size_Check_Code (Def_Id);
6603 Note_Possible_Modification (Id);
6605 -- Initialization is not allowed for imported variable
6607 if Present (Expression (Parent (Def_Id)))
6608 and then Comes_From_Source (Expression (Parent (Def_Id)))
6610 Error_Msg_Sloc := Sloc (Def_Id);
6612 ("no initialization allowed for declaration of& #",
6616 -- For compatibility, support VADS usage of providing both
6617 -- pragmas Interface and Interface_Name to obtain the effect
6618 -- of a single Import pragma.
6620 if Is_Imported (Def_Id)
6621 and then Present (First_Rep_Item (Def_Id))
6622 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
6623 and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
6627 Set_Imported (Def_Id);
6630 Set_Is_Public (Def_Id);
6631 Process_Interface_Name (Def_Id, Arg2, Arg3);
6634 -- Otherwise must be subprogram
6636 elsif not Is_Subprogram (Def_Id) then
6638 ("argument of pragma% is not subprogram", Arg1);
6641 Check_At_Most_N_Arguments (3);
6645 -- Loop through homonyms
6648 Def_Id := Get_Base_Subprogram (Hom_Id);
6650 if Is_Imported (Def_Id) then
6651 Process_Interface_Name (Def_Id, Arg2, Arg3);
6655 Hom_Id := Homonym (Hom_Id);
6657 exit when No (Hom_Id)
6658 or else Scope (Hom_Id) /= Current_Scope;
6663 ("argument of pragma% is not imported subprogram",
6669 -----------------------
6670 -- Interrupt_Handler --
6671 -----------------------
6673 -- pragma Interrupt_Handler (handler_NAME);
6675 when Pragma_Interrupt_Handler =>
6676 Check_Ada_83_Warning;
6677 Check_Arg_Count (1);
6678 Check_No_Identifiers;
6680 if No_Run_Time_Mode then
6681 Error_Msg_CRT ("Interrupt_Handler pragma", N);
6683 Check_Interrupt_Or_Attach_Handler;
6684 Process_Interrupt_Or_Attach_Handler;
6687 ------------------------
6688 -- Interrupt_Priority --
6689 ------------------------
6691 -- pragma Interrupt_Priority [(EXPRESSION)];
6693 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
6694 P : constant Node_Id := Parent (N);
6698 Check_Ada_83_Warning;
6700 if Arg_Count /= 0 then
6701 Arg := Expression (Arg1);
6702 Check_Arg_Count (1);
6703 Check_No_Identifiers;
6705 -- The expression must be analyzed in the special manner
6706 -- described in "Handling of Default and Per-Object
6707 -- Expressions" in sem.ads.
6709 Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
6712 if Nkind (P) /= N_Task_Definition
6713 and then Nkind (P) /= N_Protected_Definition
6718 elsif Has_Priority_Pragma (P) then
6719 Error_Pragma ("duplicate pragma% not allowed");
6722 Set_Has_Priority_Pragma (P, True);
6723 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
6725 end Interrupt_Priority;
6727 ---------------------
6728 -- Interrupt_State --
6729 ---------------------
6731 -- pragma Interrupt_State (
6732 -- [Name =>] INTERRUPT_ID,
6733 -- [State =>] INTERRUPT_STATE);
6735 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
6736 -- INTERRUPT_STATE => System | Runtime | User
6738 -- Note: if the interrupt id is given as an identifier, then
6739 -- it must be one of the identifiers in Ada.Interrupts.Names.
6740 -- Otherwise it is given as a static integer expression which
6741 -- must be in the range of Ada.Interrupts.Interrupt_ID.
6743 when Pragma_Interrupt_State => Interrupt_State : declare
6745 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
6746 -- This is the entity Ada.Interrupts.Interrupt_ID;
6748 State_Type : Character;
6749 -- Set to 's'/'r'/'u' for System/Runtime/User
6752 -- Index to entry in Interrupt_States table
6755 -- Value of interrupt
6757 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
6758 -- The first argument to the pragma
6760 Int_Ent : Entity_Id;
6761 -- Interrupt entity in Ada.Interrupts.Names
6765 Check_Arg_Count (2);
6767 Check_Optional_Identifier (Arg1, Name_Name);
6768 Check_Optional_Identifier (Arg2, "state");
6769 Check_Arg_Is_Identifier (Arg2);
6771 -- First argument is identifier
6773 if Nkind (Arg1X) = N_Identifier then
6775 -- Search list of names in Ada.Interrupts.Names
6777 Int_Ent := First_Entity (RTE (RE_Names));
6779 if No (Int_Ent) then
6780 Error_Pragma_Arg ("invalid interrupt name", Arg1);
6782 elsif Chars (Int_Ent) = Chars (Arg1X) then
6783 Int_Val := Expr_Value (Constant_Value (Int_Ent));
6787 Next_Entity (Int_Ent);
6790 -- First argument is not an identifier, so it must be a
6791 -- static expression of type Ada.Interrupts.Interrupt_ID.
6794 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6795 Int_Val := Expr_Value (Arg1X);
6797 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
6799 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
6802 ("value not in range of type " &
6803 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
6809 case Chars (Get_Pragma_Arg (Arg2)) is
6810 when Name_Runtime => State_Type := 'r';
6811 when Name_System => State_Type := 's';
6812 when Name_User => State_Type := 'u';
6815 Error_Pragma_Arg ("invalid interrupt state", Arg2);
6818 -- Check if entry is already stored
6820 IST_Num := Interrupt_States.First;
6822 -- If entry not found, add it
6824 if IST_Num > Interrupt_States.Last then
6825 Interrupt_States.Append
6826 ((Interrupt_Number => UI_To_Int (Int_Val),
6827 Interrupt_State => State_Type,
6828 Pragma_Loc => Loc));
6831 -- Case of entry for the same entry
6833 elsif Int_Val = Interrupt_States.Table (IST_Num).
6836 -- If state matches, done, no need to make redundant entry
6839 State_Type = Interrupt_States.Table (IST_Num).
6842 -- Otherwise if state does not match, error
6845 Interrupt_States.Table (IST_Num).Pragma_Loc;
6847 ("state conflicts with that given at #", Arg2);
6851 IST_Num := IST_Num + 1;
6853 end Interrupt_State;
6855 ----------------------
6856 -- Java_Constructor --
6857 ----------------------
6859 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
6861 when Pragma_Java_Constructor => Java_Constructor : declare
6868 Check_Arg_Count (1);
6869 Check_Optional_Identifier (Arg1, Name_Entity);
6870 Check_Arg_Is_Local_Name (Arg1);
6872 Id := Expression (Arg1);
6873 Find_Program_Unit_Name (Id);
6875 -- If we did not find the name, we are done
6877 if Etype (Id) = Any_Type then
6881 Hom_Id := Entity (Id);
6883 -- Loop through homonyms
6886 Def_Id := Get_Base_Subprogram (Hom_Id);
6888 -- The constructor is required to be a function returning
6889 -- an access type whose designated type has convention Java.
6891 if Ekind (Def_Id) = E_Function
6892 and then Ekind (Etype (Def_Id)) in Access_Kind
6895 (Designated_Type (Etype (Def_Id))) = Convention_Java
6898 (Root_Type (Designated_Type (Etype (Def_Id))))
6901 Set_Is_Constructor (Def_Id);
6902 Set_Convention (Def_Id, Convention_Java);
6906 ("pragma% requires function returning a 'Java access type",
6910 Hom_Id := Homonym (Hom_Id);
6912 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
6914 end Java_Constructor;
6916 ----------------------
6917 -- Java_Interface --
6918 ----------------------
6920 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
6922 when Pragma_Java_Interface => Java_Interface : declare
6928 Check_Arg_Count (1);
6929 Check_Optional_Identifier (Arg1, Name_Entity);
6930 Check_Arg_Is_Local_Name (Arg1);
6932 Arg := Expression (Arg1);
6935 if Etype (Arg) = Any_Type then
6939 if not Is_Entity_Name (Arg)
6940 or else not Is_Type (Entity (Arg))
6942 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6945 Typ := Underlying_Type (Entity (Arg));
6947 -- For now we simply check some of the semantic constraints
6948 -- on the type. This currently leaves out some restrictions
6949 -- on interface types, namely that the parent type must be
6950 -- java.lang.Object.Typ and that all primitives of the type
6951 -- should be declared abstract. ???
6953 if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
6954 Error_Pragma_Arg ("pragma% requires an abstract "
6955 & "tagged type", Arg1);
6957 elsif not Has_Discriminants (Typ)
6958 or else Ekind (Etype (First_Discriminant (Typ)))
6959 /= E_Anonymous_Access_Type
6961 not Is_Class_Wide_Type
6962 (Designated_Type (Etype (First_Discriminant (Typ))))
6965 ("type must have a class-wide access discriminant", Arg1);
6973 -- pragma Keep_Names ([On => ] local_NAME);
6975 when Pragma_Keep_Names => Keep_Names : declare
6980 Check_Arg_Count (1);
6981 Check_Optional_Identifier (Arg1, Name_On);
6982 Check_Arg_Is_Local_Name (Arg1);
6984 Arg := Expression (Arg1);
6987 if Etype (Arg) = Any_Type then
6991 if not Is_Entity_Name (Arg)
6992 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
6995 ("pragma% requires a local enumeration type", Arg1);
6998 Set_Discard_Names (Entity (Arg), False);
7005 -- pragma License (RESTRICTED | UNRESRICTED | GPL | MODIFIED_GPL);
7007 when Pragma_License =>
7009 Check_Arg_Count (1);
7010 Check_No_Identifiers;
7011 Check_Valid_Configuration_Pragma;
7012 Check_Arg_Is_Identifier (Arg1);
7015 Sind : constant Source_File_Index :=
7016 Source_Index (Current_Sem_Unit);
7019 case Chars (Get_Pragma_Arg (Arg1)) is
7021 Set_License (Sind, GPL);
7023 when Name_Modified_GPL =>
7024 Set_License (Sind, Modified_GPL);
7026 when Name_Restricted =>
7027 Set_License (Sind, Restricted);
7029 when Name_Unrestricted =>
7030 Set_License (Sind, Unrestricted);
7033 Error_Pragma_Arg ("invalid license name", Arg1);
7041 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
7043 when Pragma_Link_With => Link_With : declare
7049 if Operating_Mode = Generate_Code
7050 and then In_Extended_Main_Source_Unit (N)
7052 Check_At_Least_N_Arguments (1);
7053 Check_No_Identifiers;
7054 Check_Is_In_Decl_Part_Or_Package_Spec;
7055 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7059 while Present (Arg) loop
7060 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7062 -- Store argument, converting sequences of spaces
7063 -- to a single null character (this is one of the
7064 -- differences in processing between Link_With
7065 -- and Linker_Options).
7068 C : constant Char_Code := Get_Char_Code (' ');
7069 S : constant String_Id :=
7070 Strval (Expr_Value_S (Expression (Arg)));
7071 L : constant Nat := String_Length (S);
7074 procedure Skip_Spaces;
7075 -- Advance F past any spaces
7077 procedure Skip_Spaces is
7079 while F <= L and then Get_String_Char (S, F) = C loop
7085 Skip_Spaces; -- skip leading spaces
7087 -- Loop through characters, changing any embedded
7088 -- sequence of spaces to a single null character
7089 -- (this is how Link_With/Linker_Options differ)
7092 if Get_String_Char (S, F) = C then
7095 Store_String_Char (ASCII.NUL);
7098 Store_String_Char (Get_String_Char (S, F));
7106 if Present (Arg) then
7107 Store_String_Char (ASCII.NUL);
7111 Store_Linker_Option_String (End_String);
7119 -- pragma Linker_Alias (
7120 -- [Entity =>] LOCAL_NAME
7121 -- [Alias =>] static_string_EXPRESSION);
7123 when Pragma_Linker_Alias =>
7125 Check_Arg_Count (2);
7126 Check_Optional_Identifier (Arg1, Name_Entity);
7127 Check_Optional_Identifier (Arg2, "alias");
7128 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7129 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7131 -- The only processing required is to link this item on to the
7132 -- list of rep items for the given entity. This is accomplished
7133 -- by the call to Rep_Item_Too_Late (when no error is detected
7134 -- and False is returned).
7136 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7139 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7142 --------------------
7143 -- Linker_Options --
7144 --------------------
7146 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
7148 when Pragma_Linker_Options => Linker_Options : declare
7152 Check_Ada_83_Warning;
7153 Check_No_Identifiers;
7154 Check_Arg_Count (1);
7155 Check_Is_In_Decl_Part_Or_Package_Spec;
7157 if Operating_Mode = Generate_Code
7158 and then In_Extended_Main_Source_Unit (N)
7160 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7161 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
7164 while Present (Arg) loop
7165 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7166 Store_String_Char (ASCII.NUL);
7168 (Strval (Expr_Value_S (Expression (Arg))));
7172 Store_Linker_Option_String (End_String);
7176 --------------------
7177 -- Linker_Section --
7178 --------------------
7180 -- pragma Linker_Section (
7181 -- [Entity =>] LOCAL_NAME
7182 -- [Section =>] static_string_EXPRESSION);
7184 when Pragma_Linker_Section =>
7186 Check_Arg_Count (2);
7187 Check_Optional_Identifier (Arg1, Name_Entity);
7188 Check_Optional_Identifier (Arg2, Name_Section);
7189 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7190 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7192 -- The only processing required is to link this item on to the
7193 -- list of rep items for the given entity. This is accomplished
7194 -- by the call to Rep_Item_Too_Late (when no error is detected
7195 -- and False is returned).
7197 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7200 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7207 -- pragma List (On | Off)
7209 -- There is nothing to do here, since we did all the processing
7210 -- for this pragma in Par.Prag (so that it works properly even in
7211 -- syntax only mode)
7216 --------------------
7217 -- Locking_Policy --
7218 --------------------
7220 -- pragma Locking_Policy (policy_IDENTIFIER);
7222 when Pragma_Locking_Policy => declare
7226 Check_Ada_83_Warning;
7227 Check_Arg_Count (1);
7228 Check_No_Identifiers;
7229 Check_Arg_Is_Locking_Policy (Arg1);
7230 Check_Valid_Configuration_Pragma;
7231 Get_Name_String (Chars (Expression (Arg1)));
7232 LP := Fold_Upper (Name_Buffer (1));
7234 if Locking_Policy /= ' '
7235 and then Locking_Policy /= LP
7237 Error_Msg_Sloc := Locking_Policy_Sloc;
7238 Error_Pragma ("locking policy incompatible with policy#");
7240 -- Set new policy, but always preserve System_Location since
7241 -- we like the error message with the run time name.
7244 Locking_Policy := LP;
7246 if Locking_Policy_Sloc /= System_Location then
7247 Locking_Policy_Sloc := Loc;
7256 -- pragma Long_Float (D_Float | G_Float);
7258 when Pragma_Long_Float =>
7260 Check_Valid_Configuration_Pragma;
7261 Check_Arg_Count (1);
7262 Check_No_Identifier (Arg1);
7263 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
7265 if not OpenVMS_On_Target then
7266 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
7271 if Chars (Expression (Arg1)) = Name_D_Float then
7272 if Opt.Float_Format_Long = 'G' then
7273 Error_Pragma ("G_Float previously specified");
7276 Opt.Float_Format_Long := 'D';
7278 -- G_Float case (this is the default, does not need overriding)
7281 if Opt.Float_Format_Long = 'D' then
7282 Error_Pragma ("D_Float previously specified");
7285 Opt.Float_Format_Long := 'G';
7288 Set_Standard_Fpt_Formats;
7290 -----------------------
7291 -- Machine_Attribute --
7292 -----------------------
7294 -- pragma Machine_Attribute (
7295 -- [Entity =>] LOCAL_NAME,
7296 -- [Attribute_Name =>] static_string_EXPRESSION
7297 -- [,[Info =>] static_string_EXPRESSION] );
7299 when Pragma_Machine_Attribute => Machine_Attribute : declare
7305 if Arg_Count = 3 then
7306 Check_Optional_Identifier (Arg3, "info");
7307 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
7309 Check_Arg_Count (2);
7312 Check_Arg_Is_Local_Name (Arg1);
7313 Check_Optional_Identifier (Arg2, "attribute_name");
7314 Check_Optional_Identifier (Arg1, Name_Entity);
7315 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7316 Def_Id := Entity (Expression (Arg1));
7318 if Is_Access_Type (Def_Id) then
7319 Def_Id := Designated_Type (Def_Id);
7322 if Rep_Item_Too_Early (Def_Id, N) then
7326 Def_Id := Underlying_Type (Def_Id);
7328 -- The only processing required is to link this item on to the
7329 -- list of rep items for the given entity. This is accomplished
7330 -- by the call to Rep_Item_Too_Late (when no error is detected
7331 -- and False is returned).
7333 if Rep_Item_Too_Late (Def_Id, N) then
7336 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7338 end Machine_Attribute;
7344 -- pragma Main_Storage
7345 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7347 -- MAIN_STORAGE_OPTION ::=
7348 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7349 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7351 when Pragma_Main => Main : declare
7352 Args : Args_List (1 .. 3);
7353 Names : constant Name_List (1 .. 3) := (
7355 Name_Task_Stack_Size_Default,
7356 Name_Time_Slicing_Enabled);
7362 Gather_Associations (Names, Args);
7364 for J in 1 .. 2 loop
7365 if Present (Args (J)) then
7366 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7370 if Present (Args (3)) then
7371 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
7375 while Present (Nod) loop
7376 if Nkind (Nod) = N_Pragma
7377 and then Chars (Nod) = Name_Main
7379 Error_Msg_Name_1 := Chars (N);
7380 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7391 -- pragma Main_Storage
7392 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7394 -- MAIN_STORAGE_OPTION ::=
7395 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7396 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7398 when Pragma_Main_Storage => Main_Storage : declare
7399 Args : Args_List (1 .. 2);
7400 Names : constant Name_List (1 .. 2) := (
7401 Name_Working_Storage,
7408 Gather_Associations (Names, Args);
7410 for J in 1 .. 2 loop
7411 if Present (Args (J)) then
7412 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7416 Check_In_Main_Program;
7419 while Present (Nod) loop
7420 if Nkind (Nod) = N_Pragma
7421 and then Chars (Nod) = Name_Main_Storage
7423 Error_Msg_Name_1 := Chars (N);
7424 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7435 -- pragma Memory_Size (NUMERIC_LITERAL)
7437 when Pragma_Memory_Size =>
7440 -- Memory size is simply ignored
7442 Check_No_Identifiers;
7443 Check_Arg_Count (1);
7444 Check_Arg_Is_Integer_Literal (Arg1);
7450 -- pragma No_Return (procedure_LOCAL_NAME);
7452 when Pragma_No_Return => No_Return : declare
7459 Check_Arg_Count (1);
7460 Check_No_Identifiers;
7461 Check_Arg_Is_Local_Name (Arg1);
7462 Id := Expression (Arg1);
7465 if not Is_Entity_Name (Id) then
7466 Error_Pragma_Arg ("entity name required", Arg1);
7469 if Etype (Id) = Any_Type then
7477 and then Scope (E) = Current_Scope
7479 if Ekind (E) = E_Procedure
7480 or else Ekind (E) = E_Generic_Procedure
7490 Error_Pragma ("no procedures found for pragma%");
7494 ------------------------
7495 -- No_Strict_Aliasing --
7496 ------------------------
7498 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
7503 Check_At_Most_N_Arguments (1);
7505 if Arg_Count = 0 then
7506 Check_Valid_Configuration_Pragma;
7507 Opt.No_Strict_Aliasing := True;
7510 Check_Optional_Identifier (Arg2, Name_Entity);
7511 Check_Arg_Is_Local_Name (Arg1);
7512 E_Id := Entity (Expression (Arg1));
7514 if E_Id = Any_Type then
7516 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
7517 Error_Pragma_Arg ("pragma% requires access type", Arg1);
7520 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
7522 end No_Strict_Alias;
7528 -- pragma Obsolescent [(static_string_EXPRESSION)];
7530 when Pragma_Obsolescent => Obsolescent : declare
7533 Check_At_Most_N_Arguments (1);
7534 Check_No_Identifiers;
7536 if Arg_Count = 1 then
7537 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7541 or else (Nkind (Prev (N))) /= N_Subprogram_Declaration
7544 ("pragma% misplaced, must immediately " &
7545 "follow subprogram spec");
7553 -- pragma No_Run_Time
7555 -- Note: this pragma is retained for backwards compatibiltiy.
7556 -- See body of Rtsfind for full details on its handling.
7558 when Pragma_No_Run_Time =>
7560 Check_Valid_Configuration_Pragma;
7561 Check_Arg_Count (0);
7563 No_Run_Time_Mode := True;
7564 Configurable_Run_Time_Mode := True;
7567 Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
7570 Duration_32_Bits_On_Target := True;
7574 Set_Restriction (No_Finalization, N);
7575 Set_Restriction (No_Exception_Handlers, N);
7576 Set_Restriction (Max_Tasks, N, 0);
7577 Set_Restriction (No_Tasking, N);
7579 -----------------------
7580 -- Normalize_Scalars --
7581 -----------------------
7583 -- pragma Normalize_Scalars;
7585 when Pragma_Normalize_Scalars =>
7586 Check_Ada_83_Warning;
7587 Check_Arg_Count (0);
7588 Check_Valid_Configuration_Pragma;
7589 Normalize_Scalars := True;
7590 Init_Or_Norm_Scalars := True;
7596 -- pragma Optimize (Time | Space);
7598 -- The actual check for optimize is done in Gigi. Note that this
7599 -- pragma does not actually change the optimization setting, it
7600 -- simply checks that it is consistent with the pragma.
7602 when Pragma_Optimize =>
7603 Check_No_Identifiers;
7604 Check_Arg_Count (1);
7605 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
7607 -------------------------
7608 -- Optional_Overriding --
7609 -------------------------
7611 -- These pragmas are treated as part of the previous subprogram
7612 -- declaration, and analyzed immediately after it (see sem_ch6,
7613 -- Check_Overriding_Operation). If the pragma has not been analyzed
7614 -- yet, it appears in the wrong place.
7616 when Pragma_Optional_Overriding =>
7617 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7623 when Pragma_Overriding =>
7624 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7630 -- pragma Pack (first_subtype_LOCAL_NAME);
7632 when Pragma_Pack => Pack : declare
7633 Assoc : constant Node_Id := Arg1;
7638 Check_No_Identifiers;
7639 Check_Arg_Count (1);
7640 Check_Arg_Is_Local_Name (Arg1);
7642 Type_Id := Expression (Assoc);
7643 Find_Type (Type_Id);
7644 Typ := Entity (Type_Id);
7647 or else Rep_Item_Too_Early (Typ, N)
7651 Typ := Underlying_Type (Typ);
7654 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
7655 Error_Pragma ("pragma% must specify array or record type");
7658 Check_First_Subtype (Arg1);
7660 if Has_Pragma_Pack (Typ) then
7661 Error_Pragma ("duplicate pragma%, only one allowed");
7663 -- Array type. We set the Has_Pragma_Pack flag, and Is_Packed,
7664 -- but not Has_Non_Standard_Rep, because we don't actually know
7665 -- till freeze time if the array can have packed representation.
7666 -- That's because in the general case we do not know enough about
7667 -- the component type until it in turn is frozen, which certainly
7668 -- happens before the array type is frozen, but not necessarily
7669 -- till that point (i.e. right now it may be unfrozen).
7671 elsif Is_Array_Type (Typ) then
7672 if Has_Aliased_Components (Base_Type (Typ)) then
7674 ("pragma% ignored, cannot pack aliased components?");
7676 elsif Has_Atomic_Components (Typ)
7677 or else Is_Atomic (Component_Type (Typ))
7680 ("?pragma% ignored, cannot pack atomic components");
7682 elsif not Rep_Item_Too_Late (Typ, N) then
7683 Set_Is_Packed (Base_Type (Typ));
7684 Set_Has_Pragma_Pack (Base_Type (Typ));
7685 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7688 -- Record type. For record types, the pack is always effective
7690 else pragma Assert (Is_Record_Type (Typ));
7691 if not Rep_Item_Too_Late (Typ, N) then
7692 Set_Has_Pragma_Pack (Base_Type (Typ));
7693 Set_Is_Packed (Base_Type (Typ));
7694 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7705 -- There is nothing to do here, since we did all the processing
7706 -- for this pragma in Par.Prag (so that it works properly even in
7707 -- syntax only mode)
7716 -- pragma Passive [(PASSIVE_FORM)];
7718 -- PASSIVE_FORM ::= Semaphore | No
7720 when Pragma_Passive =>
7723 if Nkind (Parent (N)) /= N_Task_Definition then
7724 Error_Pragma ("pragma% must be within task definition");
7727 if Arg_Count /= 0 then
7728 Check_Arg_Count (1);
7729 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
7736 -- pragma Polling (ON | OFF);
7738 when Pragma_Polling =>
7740 Check_Arg_Count (1);
7741 Check_No_Identifiers;
7742 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7743 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
7745 ---------------------
7746 -- Persistent_Data --
7747 ---------------------
7749 when Pragma_Persistent_Data => declare
7753 -- Register the pragma as applying to the compilation unit.
7754 -- Individual Persistent_Object pragmas for relevant objects
7755 -- are generated the end of the compilation.
7758 Check_Valid_Configuration_Pragma;
7759 Check_Arg_Count (0);
7760 Ent := Find_Lib_Unit_Name;
7761 Set_Is_Preelaborated (Ent);
7764 -----------------------
7765 -- Persistent_Object --
7766 -----------------------
7768 when Pragma_Persistent_Object => declare
7776 Check_Arg_Count (1);
7777 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7779 if not Is_Entity_Name (Expression (Arg1))
7781 (Ekind (Entity (Expression (Arg1))) /= E_Variable
7782 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
7784 Error_Pragma_Arg ("pragma only applies to objects", Arg1);
7787 Ent := Entity (Expression (Arg1));
7788 Decl := Parent (Ent);
7790 if Nkind (Decl) /= N_Object_Declaration then
7794 -- Placement of the object depends on whether there is
7795 -- an initial value or none. If the No_Initialization flag
7796 -- is set, the initialization has been transformed into
7797 -- assignments, which is disallowed elaboration code.
7799 if No_Initialization (Decl) then
7801 ("initialization for persistent object"
7802 & "must be static expression", Decl);
7806 if No (Expression (Decl)) then
7808 Store_String_Chars ("section ("".persistent.bss"")");
7812 if not Is_OK_Static_Expression (Expression (Decl)) then
7813 Flag_Non_Static_Expr
7814 ("initialization for persistent object"
7815 & "must be static expression!", Expression (Decl));
7820 Store_String_Chars ("section ("".persistent.data"")");
7827 Name_Machine_Attribute,
7829 (Make_Pragma_Argument_Association
7830 (Sloc => Sloc (Arg1),
7831 Expression => New_Occurrence_Of (Ent, Sloc (Ent))),
7832 Make_Pragma_Argument_Association
7833 (Sloc => Sloc (Arg1),
7836 (Sloc => Sloc (Arg1),
7839 Insert_After (N, MA);
7841 Set_Has_Gigi_Rep_Item (Ent);
7848 -- pragma Preelaborate [(library_unit_NAME)];
7850 -- Set the flag Is_Preelaborated of program unit name entity
7852 when Pragma_Preelaborate => Preelaborate : declare
7853 Pa : constant Node_Id := Parent (N);
7854 Pk : constant Node_Kind := Nkind (Pa);
7858 Check_Ada_83_Warning;
7859 Check_Valid_Library_Unit_Pragma;
7861 if Nkind (N) = N_Null_Statement then
7865 Ent := Find_Lib_Unit_Name;
7867 -- This filters out pragmas inside generic parent then
7868 -- show up inside instantiation
7871 and then not (Pk = N_Package_Specification
7872 and then Present (Generic_Parent (Pa)))
7874 if not Debug_Flag_U then
7875 Set_Is_Preelaborated (Ent);
7876 Set_Suppress_Elaboration_Warnings (Ent);
7885 -- pragma Priority (EXPRESSION);
7887 when Pragma_Priority => Priority : declare
7888 P : constant Node_Id := Parent (N);
7892 Check_No_Identifiers;
7893 Check_Arg_Count (1);
7897 if Nkind (P) = N_Subprogram_Body then
7898 Check_In_Main_Program;
7900 Arg := Expression (Arg1);
7901 Analyze_And_Resolve (Arg, Standard_Integer);
7905 if not Is_Static_Expression (Arg) then
7906 Flag_Non_Static_Expr
7907 ("main subprogram priority is not static!", Arg);
7910 -- If constraint error, then we already signalled an error
7912 elsif Raises_Constraint_Error (Arg) then
7915 -- Otherwise check in range
7919 Val : constant Uint := Expr_Value (Arg);
7923 or else Val > Expr_Value (Expression
7924 (Parent (RTE (RE_Max_Priority))))
7927 ("main subprogram priority is out of range", Arg1);
7933 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
7935 -- Task or Protected, must be of type Integer
7937 elsif Nkind (P) = N_Protected_Definition
7939 Nkind (P) = N_Task_Definition
7941 Arg := Expression (Arg1);
7943 -- The expression must be analyzed in the special manner
7944 -- described in "Handling of Default and Per-Object
7945 -- Expressions" in sem.ads.
7947 Analyze_Per_Use_Expression (Arg, Standard_Integer);
7949 if not Is_Static_Expression (Arg) then
7950 Check_Restriction (Static_Priorities, Arg);
7953 -- Anything else is incorrect
7959 if Has_Priority_Pragma (P) then
7960 Error_Pragma ("duplicate pragma% not allowed");
7962 Set_Has_Priority_Pragma (P, True);
7964 if Nkind (P) = N_Protected_Definition
7966 Nkind (P) = N_Task_Definition
7968 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7969 -- exp_ch9 should use this ???
7978 -- pragma Profile (profile_IDENTIFIER);
7980 -- profile_IDENTIFIER => Ravenscar
7982 when Pragma_Profile =>
7984 Check_Arg_Count (1);
7985 Check_Valid_Configuration_Pragma;
7986 Check_No_Identifiers;
7990 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
7992 if Chars (Argx) = Name_Ravenscar then
7995 Error_Pragma_Arg ("& is not a valid profile", Argx);
7999 --------------------------
8000 -- Propagate_Exceptions --
8001 --------------------------
8003 -- pragma Propagate_Exceptions;
8005 when Pragma_Propagate_Exceptions =>
8007 Check_Arg_Count (0);
8009 if In_Extended_Main_Source_Unit (N) then
8010 Propagate_Exceptions := True;
8017 -- pragma Psect_Object (
8018 -- [Internal =>] LOCAL_NAME,
8019 -- [, [External =>] EXTERNAL_SYMBOL]
8020 -- [, [Size =>] EXTERNAL_SYMBOL]);
8022 when Pragma_Psect_Object | Pragma_Common_Object =>
8023 Psect_Object : declare
8024 Args : Args_List (1 .. 3);
8025 Names : constant Name_List (1 .. 3) := (
8030 Internal : Node_Id renames Args (1);
8031 External : Node_Id renames Args (2);
8032 Size : Node_Id renames Args (3);
8034 R_Internal : Node_Id;
8035 R_External : Node_Id;
8042 procedure Check_Too_Long (Arg : Node_Id);
8043 -- Posts message if the argument is an identifier with more
8044 -- than 31 characters, or a string literal with more than
8045 -- 31 characters, and we are operating under VMS
8047 --------------------
8048 -- Check_Too_Long --
8049 --------------------
8051 procedure Check_Too_Long (Arg : Node_Id) is
8052 X : constant Node_Id := Original_Node (Arg);
8055 if Nkind (X) /= N_String_Literal
8057 Nkind (X) /= N_Identifier
8060 ("inappropriate argument for pragma %", Arg);
8063 if OpenVMS_On_Target then
8064 if (Nkind (X) = N_String_Literal
8065 and then String_Length (Strval (X)) > 31)
8067 (Nkind (X) = N_Identifier
8068 and then Length_Of_Name (Chars (X)) > 31)
8071 ("argument for pragma % is longer than 31 characters",
8077 -- Start of processing for Common_Object/Psect_Object
8081 Gather_Associations (Names, Args);
8082 Process_Extended_Import_Export_Internal_Arg (Internal);
8084 R_Internal := Relocate_Node (Internal);
8086 Def_Id := Entity (R_Internal);
8088 if Ekind (Def_Id) /= E_Constant
8089 and then Ekind (Def_Id) /= E_Variable
8092 ("pragma% must designate an object", Internal);
8095 Check_Too_Long (R_Internal);
8097 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
8099 ("cannot use pragma% for imported/exported object",
8103 if Is_Concurrent_Type (Etype (R_Internal)) then
8105 ("cannot specify pragma % for task/protected object",
8109 if Is_Psected (Def_Id) then
8110 Error_Msg_N ("?duplicate Psect_Object pragma", N);
8112 Set_Is_Psected (Def_Id);
8115 if Ekind (Def_Id) = E_Constant then
8117 ("cannot specify pragma % for a constant", R_Internal);
8120 if Is_Record_Type (Etype (R_Internal)) then
8126 Ent := First_Entity (Etype (R_Internal));
8127 while Present (Ent) loop
8128 Decl := Declaration_Node (Ent);
8130 if Ekind (Ent) = E_Component
8131 and then Nkind (Decl) = N_Component_Declaration
8132 and then Present (Expression (Decl))
8133 and then Warn_On_Export_Import
8136 ("?object for pragma % has defaults", R_Internal);
8146 if Present (Size) then
8147 Check_Too_Long (Size);
8150 -- Make Psect case-insensitive.
8152 if Present (External) then
8153 Check_Too_Long (External);
8155 if Nkind (External) = N_String_Literal then
8156 String_To_Name_Buffer (Strval (External));
8158 Get_Name_String (Chars (External));
8163 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8165 R_External := Make_String_Literal
8166 (Sloc => Sloc (External), Strval => Str);
8168 Get_Name_String (Chars (Internal));
8171 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8173 R_External := Make_String_Literal
8174 (Sloc => Sloc (Internal), Strval => Str);
8177 -- Transform into pragma Linker_Section, add attributes to
8178 -- match what DEC Ada does. Ignore size for now?
8183 Name_Linker_Section,
8185 (Make_Pragma_Argument_Association
8186 (Sloc => Sloc (R_Internal),
8187 Expression => R_Internal),
8188 Make_Pragma_Argument_Association
8189 (Sloc => Sloc (R_External),
8190 Expression => R_External))));
8194 -- Add Machine_Attribute of "overlaid", so the section overlays
8195 -- other sections of the same name.
8198 Store_String_Chars ("overlaid");
8204 Name_Machine_Attribute,
8206 (Make_Pragma_Argument_Association
8207 (Sloc => Sloc (R_Internal),
8208 Expression => R_Internal),
8209 Make_Pragma_Argument_Association
8210 (Sloc => Sloc (R_External),
8213 (Sloc => Sloc (R_External),
8217 -- Add Machine_Attribute of "global", so the section is visible
8221 Store_String_Chars ("global");
8227 Name_Machine_Attribute,
8229 (Make_Pragma_Argument_Association
8230 (Sloc => Sloc (R_Internal),
8231 Expression => R_Internal),
8233 Make_Pragma_Argument_Association
8234 (Sloc => Sloc (R_External),
8237 (Sloc => Sloc (R_External),
8241 -- Add Machine_Attribute of "initialize", so the section is
8245 Store_String_Chars ("initialize");
8251 Name_Machine_Attribute,
8253 (Make_Pragma_Argument_Association
8254 (Sloc => Sloc (R_Internal),
8255 Expression => R_Internal),
8257 Make_Pragma_Argument_Association
8258 (Sloc => Sloc (R_External),
8261 (Sloc => Sloc (R_External),
8270 -- pragma Pure [(library_unit_NAME)];
8272 when Pragma_Pure => Pure : declare
8275 Check_Ada_83_Warning;
8276 Check_Valid_Library_Unit_Pragma;
8278 if Nkind (N) = N_Null_Statement then
8282 Ent := Find_Lib_Unit_Name;
8284 Set_Suppress_Elaboration_Warnings (Ent);
8291 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
8293 when Pragma_Pure_Function => Pure_Function : declare
8297 Effective : Boolean := False;
8301 Check_Arg_Count (1);
8302 Check_Optional_Identifier (Arg1, Name_Entity);
8303 Check_Arg_Is_Local_Name (Arg1);
8304 E_Id := Expression (Arg1);
8306 if Error_Posted (E_Id) then
8310 -- Loop through homonyms (overloadings) of referenced entity
8316 Def_Id := Get_Base_Subprogram (E);
8318 if Ekind (Def_Id) /= E_Function
8319 and then Ekind (Def_Id) /= E_Generic_Function
8320 and then Ekind (Def_Id) /= E_Operator
8323 ("pragma% requires a function name", Arg1);
8326 Set_Is_Pure (Def_Id);
8328 if not Has_Pragma_Pure_Function (Def_Id) then
8329 Set_Has_Pragma_Pure_Function (Def_Id);
8334 exit when No (E) or else Scope (E) /= Current_Scope;
8338 and then Warn_On_Redundant_Constructs
8340 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
8346 --------------------
8347 -- Queuing_Policy --
8348 --------------------
8350 -- pragma Queuing_Policy (policy_IDENTIFIER);
8352 when Pragma_Queuing_Policy => declare
8356 Check_Ada_83_Warning;
8357 Check_Arg_Count (1);
8358 Check_No_Identifiers;
8359 Check_Arg_Is_Queuing_Policy (Arg1);
8360 Check_Valid_Configuration_Pragma;
8361 Get_Name_String (Chars (Expression (Arg1)));
8362 QP := Fold_Upper (Name_Buffer (1));
8364 if Queuing_Policy /= ' '
8365 and then Queuing_Policy /= QP
8367 Error_Msg_Sloc := Queuing_Policy_Sloc;
8368 Error_Pragma ("queuing policy incompatible with policy#");
8370 -- Set new policy, but always preserve System_Location since
8371 -- we like the error message with the run time name.
8374 Queuing_Policy := QP;
8376 if Queuing_Policy_Sloc /= System_Location then
8377 Queuing_Policy_Sloc := Loc;
8382 ---------------------------
8383 -- Remote_Call_Interface --
8384 ---------------------------
8386 -- pragma Remote_Call_Interface [(library_unit_NAME)];
8388 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
8389 Cunit_Node : Node_Id;
8390 Cunit_Ent : Entity_Id;
8394 Check_Ada_83_Warning;
8395 Check_Valid_Library_Unit_Pragma;
8397 if Nkind (N) = N_Null_Statement then
8401 Cunit_Node := Cunit (Current_Sem_Unit);
8402 K := Nkind (Unit (Cunit_Node));
8403 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8405 if K = N_Package_Declaration
8406 or else K = N_Generic_Package_Declaration
8407 or else K = N_Subprogram_Declaration
8408 or else K = N_Generic_Subprogram_Declaration
8409 or else (K = N_Subprogram_Body
8410 and then Acts_As_Spec (Unit (Cunit_Node)))
8415 "pragma% must apply to package or subprogram declaration");
8418 Set_Is_Remote_Call_Interface (Cunit_Ent);
8419 end Remote_Call_Interface;
8425 -- pragma Remote_Types [(library_unit_NAME)];
8427 when Pragma_Remote_Types => Remote_Types : declare
8428 Cunit_Node : Node_Id;
8429 Cunit_Ent : Entity_Id;
8432 Check_Ada_83_Warning;
8433 Check_Valid_Library_Unit_Pragma;
8435 if Nkind (N) = N_Null_Statement then
8439 Cunit_Node := Cunit (Current_Sem_Unit);
8440 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8442 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8444 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8447 "pragma% can only apply to a package declaration");
8450 Set_Is_Remote_Types (Cunit_Ent);
8457 -- pragma Ravenscar;
8459 when Pragma_Ravenscar =>
8461 Check_Arg_Count (0);
8462 Check_Valid_Configuration_Pragma;
8465 -------------------------
8466 -- Restricted_Run_Time --
8467 -------------------------
8469 -- pragma Restricted_Run_Time;
8471 when Pragma_Restricted_Run_Time =>
8473 Check_Arg_Count (0);
8474 Check_Valid_Configuration_Pragma;
8475 Set_Restricted_Profile (N);
8481 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
8484 -- restriction_IDENTIFIER
8485 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8487 when Pragma_Restrictions =>
8488 Process_Restrictions_Or_Restriction_Warnings;
8490 --------------------------
8491 -- Restriction_Warnings --
8492 --------------------------
8494 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
8497 -- restriction_IDENTIFIER
8498 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8500 when Pragma_Restriction_Warnings =>
8501 Process_Restrictions_Or_Restriction_Warnings;
8507 -- pragma Reviewable;
8509 when Pragma_Reviewable =>
8510 Check_Ada_83_Warning;
8511 Check_Arg_Count (0);
8517 -- pragma Share_Generic (NAME {, NAME});
8519 when Pragma_Share_Generic =>
8521 Process_Generic_List;
8527 -- pragma Shared (LOCAL_NAME);
8529 when Pragma_Shared =>
8531 Process_Atomic_Shared_Volatile;
8533 --------------------
8534 -- Shared_Passive --
8535 --------------------
8537 -- pragma Shared_Passive [(library_unit_NAME)];
8539 -- Set the flag Is_Shared_Passive of program unit name entity
8541 when Pragma_Shared_Passive => Shared_Passive : declare
8542 Cunit_Node : Node_Id;
8543 Cunit_Ent : Entity_Id;
8546 Check_Ada_83_Warning;
8547 Check_Valid_Library_Unit_Pragma;
8549 if Nkind (N) = N_Null_Statement then
8553 Cunit_Node := Cunit (Current_Sem_Unit);
8554 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8556 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8558 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8561 "pragma% can only apply to a package declaration");
8564 Set_Is_Shared_Passive (Cunit_Ent);
8567 ----------------------
8568 -- Source_File_Name --
8569 ----------------------
8571 -- There are five forms for this pragma:
8573 -- pragma Source_File_Name (
8574 -- [UNIT_NAME =>] unit_NAME,
8575 -- BODY_FILE_NAME => STRING_LITERAL
8576 -- [, [INDEX =>] INTEGER_LITERAL]);
8578 -- pragma Source_File_Name (
8579 -- [UNIT_NAME =>] unit_NAME,
8580 -- SPEC_FILE_NAME => STRING_LITERAL
8581 -- [, [INDEX =>] INTEGER_LITERAL]);
8583 -- pragma Source_File_Name (
8584 -- BODY_FILE_NAME => STRING_LITERAL
8585 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8586 -- [, CASING => CASING_SPEC]);
8588 -- pragma Source_File_Name (
8589 -- SPEC_FILE_NAME => STRING_LITERAL
8590 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8591 -- [, CASING => CASING_SPEC]);
8593 -- pragma Source_File_Name (
8594 -- SUBUNIT_FILE_NAME => STRING_LITERAL
8595 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8596 -- [, CASING => CASING_SPEC]);
8598 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
8600 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
8601 -- Source_File_Name (SFN), however their usage is exclusive:
8602 -- SFN can only be used when no project file is used, while
8603 -- SFNP can only be used when a project file is used.
8605 -- No processing here. Processing was completed during parsing,
8606 -- since we need to have file names set as early as possible.
8607 -- Units are loaded well before semantic processing starts.
8609 -- The only processing we defer to this point is the check
8610 -- for correct placement.
8612 when Pragma_Source_File_Name =>
8614 Check_Valid_Configuration_Pragma;
8616 ------------------------------
8617 -- Source_File_Name_Project --
8618 ------------------------------
8620 -- See Source_File_Name for syntax
8622 -- No processing here. Processing was completed during parsing,
8623 -- since we need to have file names set as early as possible.
8624 -- Units are loaded well before semantic processing starts.
8626 -- The only processing we defer to this point is the check
8627 -- for correct placement.
8629 when Pragma_Source_File_Name_Project =>
8631 Check_Valid_Configuration_Pragma;
8633 -- Check that a pragma Source_File_Name_Project is used only
8634 -- in a configuration pragmas file.
8636 -- Pragmas Source_File_Name_Project should only be generated
8637 -- by the Project Manager in configuration pragmas files.
8639 -- This is really an ugly test. It seems to depend on some
8640 -- accidental and undocumented property. At the very least
8641 -- it needs to be documented, but it would be better to have
8642 -- a clean way of testing if we are in a configuration file???
8644 if Present (Parent (N)) then
8646 ("pragma% can only appear in a configuration pragmas file");
8649 ----------------------
8650 -- Source_Reference --
8651 ----------------------
8653 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
8655 -- Nothing to do, all processing completed in Par.Prag, since we
8656 -- need the information for possible parser messages that are output
8658 when Pragma_Source_Reference =>
8665 -- pragma Storage_Size (EXPRESSION);
8667 when Pragma_Storage_Size => Storage_Size : declare
8668 P : constant Node_Id := Parent (N);
8672 Check_No_Identifiers;
8673 Check_Arg_Count (1);
8675 -- The expression must be analyzed in the special manner
8676 -- described in "Handling of Default Expressions" in sem.ads.
8678 -- Set In_Default_Expression for per-object case ???
8680 Arg := Expression (Arg1);
8681 Analyze_Per_Use_Expression (Arg, Any_Integer);
8683 if not Is_Static_Expression (Arg) then
8684 Check_Restriction (Static_Storage_Size, Arg);
8687 if Nkind (P) /= N_Task_Definition then
8692 if Has_Storage_Size_Pragma (P) then
8693 Error_Pragma ("duplicate pragma% not allowed");
8695 Set_Has_Storage_Size_Pragma (P, True);
8698 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8699 -- ??? exp_ch9 should use this!
8707 -- pragma Storage_Unit (NUMERIC_LITERAL);
8709 -- Only permitted argument is System'Storage_Unit value
8711 when Pragma_Storage_Unit =>
8712 Check_No_Identifiers;
8713 Check_Arg_Count (1);
8714 Check_Arg_Is_Integer_Literal (Arg1);
8716 if Intval (Expression (Arg1)) /=
8717 UI_From_Int (Ttypes.System_Storage_Unit)
8719 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
8721 ("the only allowed argument for pragma% is ^", Arg1);
8724 --------------------
8725 -- Stream_Convert --
8726 --------------------
8728 -- pragma Stream_Convert (
8729 -- [Entity =>] type_LOCAL_NAME,
8730 -- [Read =>] function_NAME,
8731 -- [Write =>] function NAME);
8733 when Pragma_Stream_Convert => Stream_Convert : declare
8735 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
8736 -- Check that the given argument is the name of a local
8737 -- function of one argument that is not overloaded earlier
8738 -- in the current local scope. A check is also made that the
8739 -- argument is a function with one parameter.
8741 --------------------------------------
8742 -- Check_OK_Stream_Convert_Function --
8743 --------------------------------------
8745 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
8749 Check_Arg_Is_Local_Name (Arg);
8750 Ent := Entity (Expression (Arg));
8752 if Has_Homonym (Ent) then
8754 ("argument for pragma% may not be overloaded", Arg);
8757 if Ekind (Ent) /= E_Function
8758 or else No (First_Formal (Ent))
8759 or else Present (Next_Formal (First_Formal (Ent)))
8762 ("argument for pragma% must be" &
8763 " function of one argument", Arg);
8765 end Check_OK_Stream_Convert_Function;
8767 -- Start of procecessing for Stream_Convert
8771 Check_Arg_Count (3);
8772 Check_Optional_Identifier (Arg1, Name_Entity);
8773 Check_Optional_Identifier (Arg2, Name_Read);
8774 Check_Optional_Identifier (Arg3, Name_Write);
8775 Check_Arg_Is_Local_Name (Arg1);
8776 Check_OK_Stream_Convert_Function (Arg2);
8777 Check_OK_Stream_Convert_Function (Arg3);
8780 Typ : constant Entity_Id :=
8781 Underlying_Type (Entity (Expression (Arg1)));
8782 Read : constant Entity_Id := Entity (Expression (Arg2));
8783 Write : constant Entity_Id := Entity (Expression (Arg3));
8786 if Etype (Typ) = Any_Type
8788 Etype (Read) = Any_Type
8790 Etype (Write) = Any_Type
8795 Check_First_Subtype (Arg1);
8797 if Rep_Item_Too_Early (Typ, N)
8799 Rep_Item_Too_Late (Typ, N)
8804 if Underlying_Type (Etype (Read)) /= Typ then
8806 ("incorrect return type for function&", Arg2);
8809 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
8811 ("incorrect parameter type for function&", Arg3);
8814 if Underlying_Type (Etype (First_Formal (Read))) /=
8815 Underlying_Type (Etype (Write))
8818 ("result type of & does not match Read parameter type",
8824 -------------------------
8825 -- Style_Checks (GNAT) --
8826 -------------------------
8828 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
8830 -- This is processed by the parser since some of the style
8831 -- checks take place during source scanning and parsing. This
8832 -- means that we don't need to issue error messages here.
8834 when Pragma_Style_Checks => Style_Checks : declare
8835 A : constant Node_Id := Expression (Arg1);
8841 Check_No_Identifiers;
8843 -- Two argument form
8845 if Arg_Count = 2 then
8846 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
8853 E_Id := Expression (Arg2);
8856 if not Is_Entity_Name (E_Id) then
8858 ("second argument of pragma% must be entity name",
8868 Set_Suppress_Style_Checks (E,
8869 (Chars (Expression (Arg1)) = Name_Off));
8870 exit when No (Homonym (E));
8876 -- One argument form
8879 Check_Arg_Count (1);
8881 if Nkind (A) = N_String_Literal then
8885 Slen : constant Natural := Natural (String_Length (S));
8886 Options : String (1 .. Slen);
8892 C := Get_String_Char (S, Int (J));
8893 exit when not In_Character_Range (C);
8894 Options (J) := Get_Character (C);
8897 Set_Style_Check_Options (Options);
8905 elsif Nkind (A) = N_Identifier then
8907 if Chars (A) = Name_All_Checks then
8908 Set_Default_Style_Check_Options;
8910 elsif Chars (A) = Name_On then
8911 Style_Check := True;
8913 elsif Chars (A) = Name_Off then
8914 Style_Check := False;
8925 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
8927 when Pragma_Subtitle =>
8929 Check_Arg_Count (1);
8930 Check_Optional_Identifier (Arg1, Name_Subtitle);
8931 Check_Arg_Is_String_Literal (Arg1);
8937 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
8939 when Pragma_Suppress =>
8940 Process_Suppress_Unsuppress (True);
8946 -- pragma Suppress_All;
8948 -- The only check made here is that the pragma appears in the
8949 -- proper place, i.e. following a compilation unit. If indeed
8950 -- it appears in this context, then the parser has already
8951 -- inserted an equivalent pragma Suppress (All_Checks) to get
8952 -- the required effect.
8954 when Pragma_Suppress_All =>
8956 Check_Arg_Count (0);
8958 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
8959 or else not Is_List_Member (N)
8960 or else List_Containing (N) /= Pragmas_After (Parent (N))
8963 ("misplaced pragma%, must follow compilation unit");
8966 -------------------------
8967 -- Suppress_Debug_Info --
8968 -------------------------
8970 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
8972 when Pragma_Suppress_Debug_Info =>
8974 Check_Arg_Count (1);
8975 Check_Arg_Is_Local_Name (Arg1);
8976 Check_Optional_Identifier (Arg1, Name_Entity);
8977 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
8979 ----------------------------------
8980 -- Suppress_Exception_Locations --
8981 ----------------------------------
8983 -- pragma Suppress_Exception_Locations;
8985 when Pragma_Suppress_Exception_Locations =>
8987 Check_Arg_Count (0);
8988 Check_Valid_Configuration_Pragma;
8989 Exception_Locations_Suppressed := True;
8991 -----------------------------
8992 -- Suppress_Initialization --
8993 -----------------------------
8995 -- pragma Suppress_Initialization ([Entity =>] type_Name);
8997 when Pragma_Suppress_Initialization => Suppress_Init : declare
9003 Check_Arg_Count (1);
9004 Check_Optional_Identifier (Arg1, Name_Entity);
9005 Check_Arg_Is_Local_Name (Arg1);
9007 E_Id := Expression (Arg1);
9009 if Etype (E_Id) = Any_Type then
9016 if Is_Incomplete_Or_Private_Type (E) then
9017 if No (Full_View (Base_Type (E))) then
9019 ("argument of pragma% cannot be an incomplete type",
9022 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
9025 Set_Suppress_Init_Proc (Base_Type (E));
9030 ("pragma% requires argument that is a type name", Arg1);
9038 -- pragma System_Name (DIRECT_NAME);
9040 -- Syntax check: one argument, which must be the identifier GNAT
9041 -- or the identifier GCC, no other identifiers are acceptable.
9043 when Pragma_System_Name =>
9044 Check_No_Identifiers;
9045 Check_Arg_Count (1);
9046 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
9048 -----------------------------
9049 -- Task_Dispatching_Policy --
9050 -----------------------------
9052 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
9054 when Pragma_Task_Dispatching_Policy => declare
9058 Check_Ada_83_Warning;
9059 Check_Arg_Count (1);
9060 Check_No_Identifiers;
9061 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9062 Check_Valid_Configuration_Pragma;
9063 Get_Name_String (Chars (Expression (Arg1)));
9064 DP := Fold_Upper (Name_Buffer (1));
9066 if Task_Dispatching_Policy /= ' '
9067 and then Task_Dispatching_Policy /= DP
9069 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9071 ("task dispatching policy incompatible with policy#");
9073 -- Set new policy, but always preserve System_Location since
9074 -- we like the error message with the run time name.
9077 Task_Dispatching_Policy := DP;
9079 if Task_Dispatching_Policy_Sloc /= System_Location then
9080 Task_Dispatching_Policy_Sloc := Loc;
9089 -- pragma Task_Info (EXPRESSION);
9091 when Pragma_Task_Info => Task_Info : declare
9092 P : constant Node_Id := Parent (N);
9097 if Nkind (P) /= N_Task_Definition then
9098 Error_Pragma ("pragma% must appear in task definition");
9101 Check_No_Identifiers;
9102 Check_Arg_Count (1);
9104 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
9106 if Etype (Expression (Arg1)) = Any_Type then
9110 if Has_Task_Info_Pragma (P) then
9111 Error_Pragma ("duplicate pragma% not allowed");
9113 Set_Has_Task_Info_Pragma (P, True);
9121 -- pragma Task_Name (string_EXPRESSION);
9123 when Pragma_Task_Name => Task_Name : declare
9124 -- pragma Priority (EXPRESSION);
9126 P : constant Node_Id := Parent (N);
9130 Check_No_Identifiers;
9131 Check_Arg_Count (1);
9133 Arg := Expression (Arg1);
9134 Analyze_And_Resolve (Arg, Standard_String);
9136 if Nkind (P) /= N_Task_Definition then
9140 if Has_Task_Name_Pragma (P) then
9141 Error_Pragma ("duplicate pragma% not allowed");
9143 Set_Has_Task_Name_Pragma (P, True);
9144 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9152 -- pragma Task_Storage (
9153 -- [Task_Type =>] LOCAL_NAME,
9154 -- [Top_Guard =>] static_integer_EXPRESSION);
9156 when Pragma_Task_Storage => Task_Storage : declare
9157 Args : Args_List (1 .. 2);
9158 Names : constant Name_List (1 .. 2) := (
9162 Task_Type : Node_Id renames Args (1);
9163 Top_Guard : Node_Id renames Args (2);
9169 Gather_Associations (Names, Args);
9171 if No (Task_Type) then
9173 ("missing task_type argument for pragma%");
9176 Check_Arg_Is_Local_Name (Task_Type);
9178 Ent := Entity (Task_Type);
9180 if not Is_Task_Type (Ent) then
9182 ("argument for pragma% must be task type", Task_Type);
9185 if No (Top_Guard) then
9187 ("pragma% takes two arguments", Task_Type);
9189 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
9192 Check_First_Subtype (Task_Type);
9194 if Rep_Item_Too_Late (Ent, N) then
9203 -- pragma Thread_Body
9204 -- ( [Entity =>] LOCAL_NAME
9205 -- [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);
9207 when Pragma_Thread_Body => Thread_Body : declare
9214 Check_At_Least_N_Arguments (1);
9215 Check_At_Most_N_Arguments (2);
9216 Check_Optional_Identifier (Arg1, Name_Entity);
9217 Check_Arg_Is_Local_Name (Arg1);
9219 Id := Expression (Arg1);
9221 if not Is_Entity_Name (Id)
9222 or else not Is_Subprogram (Entity (Id))
9224 Error_Pragma_Arg ("subprogram name required", Arg1);
9229 -- Go to renamed subprogram if present, since Thread_Body applies
9230 -- to the actual renamed entity, not to the renaming entity.
9232 if Present (Alias (E))
9233 and then Nkind (Parent (Declaration_Node (E))) =
9234 N_Subprogram_Renaming_Declaration
9239 -- Various error checks
9241 if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
9243 ("pragma% requires separate spec and must come before body");
9245 elsif Rep_Item_Too_Early (E, N)
9247 Rep_Item_Too_Late (E, N)
9251 elsif Is_Thread_Body (E) then
9253 ("only one thread body pragma allowed", Arg1);
9255 elsif Present (Homonym (E))
9256 and then Scope (Homonym (E)) = Current_Scope
9259 ("thread body subprogram must not be overloaded", Arg1);
9262 Set_Is_Thread_Body (E);
9264 -- Deal with secondary stack argument
9266 if Arg_Count = 2 then
9267 Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
9268 SS := Expression (Arg2);
9269 Analyze_And_Resolve (SS, Any_Integer);
9277 -- pragma Time_Slice (static_duration_EXPRESSION);
9279 when Pragma_Time_Slice => Time_Slice : declare
9285 Check_Arg_Count (1);
9286 Check_No_Identifiers;
9287 Check_In_Main_Program;
9288 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
9290 if not Error_Posted (Arg1) then
9292 while Present (Nod) loop
9293 if Nkind (Nod) = N_Pragma
9294 and then Chars (Nod) = Name_Time_Slice
9296 Error_Msg_Name_1 := Chars (N);
9297 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9304 -- Process only if in main unit
9306 if Get_Source_Unit (Loc) = Main_Unit then
9307 Opt.Time_Slice_Set := True;
9308 Val := Expr_Value_R (Expression (Arg1));
9310 if Val <= Ureal_0 then
9311 Opt.Time_Slice_Value := 0;
9313 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
9314 Opt.Time_Slice_Value := 1_000_000_000;
9317 Opt.Time_Slice_Value :=
9318 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
9327 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
9329 -- TITLING_OPTION ::=
9330 -- [Title =>] STRING_LITERAL
9331 -- | [Subtitle =>] STRING_LITERAL
9333 when Pragma_Title => Title : declare
9334 Args : Args_List (1 .. 2);
9335 Names : constant Name_List (1 .. 2) := (
9341 Gather_Associations (Names, Args);
9343 for J in 1 .. 2 loop
9344 if Present (Args (J)) then
9345 Check_Arg_Is_String_Literal (Args (J));
9350 ---------------------
9351 -- Unchecked_Union --
9352 ---------------------
9354 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
9356 when Pragma_Unchecked_Union => Unchecked_Union : declare
9357 Assoc : constant Node_Id := Arg1;
9358 Type_Id : constant Node_Id := Expression (Assoc);
9369 Check_No_Identifiers;
9370 Check_Arg_Count (1);
9371 Check_Arg_Is_Local_Name (Arg1);
9373 Find_Type (Type_Id);
9374 Typ := Entity (Type_Id);
9377 or else Rep_Item_Too_Early (Typ, N)
9381 Typ := Underlying_Type (Typ);
9384 if Rep_Item_Too_Late (Typ, N) then
9388 Check_First_Subtype (Arg1);
9390 -- Note remaining cases are references to a type in the current
9391 -- declarative part. If we find an error, we post the error on
9392 -- the relevant type declaration at an appropriate point.
9394 if not Is_Record_Type (Typ) then
9395 Error_Msg_N ("Unchecked_Union must be record type", Typ);
9398 elsif Is_Tagged_Type (Typ) then
9399 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
9402 elsif Is_Limited_Type (Typ) then
9404 ("Unchecked_Union must not be limited record type", Typ);
9405 Explain_Limited_Type (Typ, Typ);
9409 if not Has_Discriminants (Typ) then
9411 ("Unchecked_Union must have one discriminant", Typ);
9415 Discr := First_Discriminant (Typ);
9417 if Present (Next_Discriminant (Discr)) then
9419 ("Unchecked_Union must have exactly one discriminant",
9420 Next_Discriminant (Discr));
9424 if No (Discriminant_Default_Value (Discr)) then
9426 ("Unchecked_Union discriminant must have default value",
9430 Tdef := Type_Definition (Declaration_Node (Typ));
9431 Clist := Component_List (Tdef);
9433 if No (Clist) or else No (Variant_Part (Clist)) then
9435 ("Unchecked_Union must have variant part",
9440 Vpart := Variant_Part (Clist);
9442 if Is_Non_Empty_List (Component_Items (Clist)) then
9444 ("components before variant not allowed " &
9445 "in Unchecked_Union",
9446 First (Component_Items (Clist)));
9449 Variant := First (Variants (Vpart));
9450 while Present (Variant) loop
9451 Clist := Component_List (Variant);
9453 if Present (Variant_Part (Clist)) then
9455 ("Unchecked_Union may not have nested variants",
9456 Variant_Part (Clist));
9459 if not Is_Non_Empty_List (Component_Items (Clist)) then
9461 ("Unchecked_Union may not have empty component list",
9466 Comp := First (Component_Items (Clist));
9468 if Nkind (Comp) = N_Component_Declaration then
9470 if Present (Expression (Comp)) then
9472 ("default initialization not allowed " &
9473 "in Unchecked_Union",
9478 Sindic : constant Node_Id :=
9479 Subtype_Indication (Component_Definition (Comp));
9482 if Nkind (Sindic) = N_Subtype_Indication then
9483 Check_Static_Constraint (Constraint (Sindic));
9488 if Present (Next (Comp)) then
9490 ("Unchecked_Union variant can have only one component",
9498 Set_Is_Unchecked_Union (Typ, True);
9499 Set_Convention (Typ, Convention_C);
9501 Set_Has_Unchecked_Union (Base_Type (Typ), True);
9502 Set_Is_Unchecked_Union (Base_Type (Typ), True);
9503 end Unchecked_Union;
9505 ------------------------
9506 -- Unimplemented_Unit --
9507 ------------------------
9509 -- pragma Unimplemented_Unit;
9511 -- Note: this only gives an error if we are generating code,
9512 -- or if we are in a generic library unit (where the pragma
9513 -- appears in the body, not in the spec).
9515 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
9516 Cunitent : constant Entity_Id :=
9517 Cunit_Entity (Get_Source_Unit (Loc));
9518 Ent_Kind : constant Entity_Kind :=
9523 Check_Arg_Count (0);
9525 if Operating_Mode = Generate_Code
9526 or else Ent_Kind = E_Generic_Function
9527 or else Ent_Kind = E_Generic_Procedure
9528 or else Ent_Kind = E_Generic_Package
9530 Get_Name_String (Chars (Cunitent));
9531 Set_Casing (Mixed_Case);
9532 Write_Str (Name_Buffer (1 .. Name_Len));
9533 Write_Str (" is not implemented");
9535 raise Unrecoverable_Error;
9537 end Unimplemented_Unit;
9539 --------------------
9540 -- Universal_Data --
9541 --------------------
9543 -- pragma Universal_Data [(library_unit_NAME)];
9545 when Pragma_Universal_Data =>
9548 -- If this is a configuration pragma, then set the universal
9549 -- addressing option, otherwise confirm that the pragma
9550 -- satisfies the requirements of library unit pragma placement
9551 -- and leave it to the GNAAMP back end to detect the pragma
9552 -- (avoids transitive setting of the option due to withed units).
9554 if Is_Configuration_Pragma then
9555 Universal_Addressing_On_AAMP := True;
9557 Check_Valid_Library_Unit_Pragma;
9560 if not AAMP_On_Target then
9561 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
9568 -- pragma Unreferenced (local_Name {, local_Name});
9570 when Pragma_Unreferenced => Unreferenced : declare
9573 Arg_Ent : Entity_Id;
9577 Check_At_Least_N_Arguments (1);
9581 while Present (Arg_Node) loop
9582 Check_No_Identifier (Arg_Node);
9584 -- Note that the analyze call done by Check_Arg_Is_Local_Name
9585 -- will in fact generate a reference, so that the entity will
9586 -- have a reference, which will inhibit any warnings about it
9587 -- not being referenced, and also properly show up in the ali
9588 -- file as a reference. But this reference is recorded before
9589 -- the Has_Pragma_Unreferenced flag is set, so that no warning
9590 -- is generated for this reference.
9592 Check_Arg_Is_Local_Name (Arg_Node);
9593 Arg_Expr := Get_Pragma_Arg (Arg_Node);
9595 if Is_Entity_Name (Arg_Expr) then
9596 Arg_Ent := Entity (Arg_Expr);
9598 -- If the entity is overloaded, the pragma applies to the
9599 -- most recent overloading, as documented. In this case,
9600 -- name resolution does not generate a reference, so it
9601 -- must be done here explicitly.
9603 if Is_Overloaded (Arg_Expr) then
9604 Generate_Reference (Arg_Ent, N);
9607 Set_Has_Pragma_Unreferenced (Arg_Ent);
9614 ------------------------------
9615 -- Unreserve_All_Interrupts --
9616 ------------------------------
9618 -- pragma Unreserve_All_Interrupts;
9620 when Pragma_Unreserve_All_Interrupts =>
9622 Check_Arg_Count (0);
9624 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
9625 Unreserve_All_Interrupts := True;
9632 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
9634 when Pragma_Unsuppress =>
9636 Process_Suppress_Unsuppress (False);
9642 -- pragma Use_VADS_Size;
9644 when Pragma_Use_VADS_Size =>
9646 Check_Arg_Count (0);
9647 Check_Valid_Configuration_Pragma;
9648 Use_VADS_Size := True;
9650 ---------------------
9651 -- Validity_Checks --
9652 ---------------------
9654 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
9656 when Pragma_Validity_Checks => Validity_Checks : declare
9657 A : constant Node_Id := Expression (Arg1);
9663 Check_Arg_Count (1);
9664 Check_No_Identifiers;
9666 if Nkind (A) = N_String_Literal then
9670 Slen : constant Natural := Natural (String_Length (S));
9671 Options : String (1 .. Slen);
9677 C := Get_String_Char (S, Int (J));
9678 exit when not In_Character_Range (C);
9679 Options (J) := Get_Character (C);
9682 Set_Validity_Check_Options (Options);
9690 elsif Nkind (A) = N_Identifier then
9692 if Chars (A) = Name_All_Checks then
9693 Set_Validity_Check_Options ("a");
9695 elsif Chars (A) = Name_On then
9696 Validity_Checks_On := True;
9698 elsif Chars (A) = Name_Off then
9699 Validity_Checks_On := False;
9703 end Validity_Checks;
9709 -- pragma Volatile (LOCAL_NAME);
9711 when Pragma_Volatile =>
9712 Process_Atomic_Shared_Volatile;
9714 -------------------------
9715 -- Volatile_Components --
9716 -------------------------
9718 -- pragma Volatile_Components (array_LOCAL_NAME);
9720 -- Volatile is handled by the same circuit as Atomic_Components
9726 -- pragma Warnings (On | Off, [LOCAL_NAME])
9728 when Pragma_Warnings => Warnings : begin
9730 Check_At_Least_N_Arguments (1);
9731 Check_At_Most_N_Arguments (2);
9732 Check_No_Identifiers;
9734 -- One argument case was processed by parser in Par.Prag
9736 if Arg_Count /= 1 then
9737 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9738 Check_Arg_Count (2);
9745 E_Id := Expression (Arg2);
9748 -- In the expansion of an inlined body, a reference to
9749 -- the formal may be wrapped in a conversion if the actual
9750 -- is a conversion. Retrieve the real entity name.
9752 if (In_Instance_Body
9753 or else In_Inlined_Body)
9754 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
9756 E_Id := Expression (E_Id);
9759 if not Is_Entity_Name (E_Id) then
9761 ("second argument of pragma% must be entity name",
9771 Set_Warnings_Off (E,
9772 (Chars (Expression (Arg1)) = Name_Off));
9774 if Is_Enumeration_Type (E) then
9776 Lit : Entity_Id := First_Literal (E);
9779 while Present (Lit) loop
9780 Set_Warnings_Off (Lit);
9786 exit when No (Homonym (E));
9798 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
9800 when Pragma_Weak_External => Weak_External : declare
9805 Check_Arg_Count (1);
9806 Check_Optional_Identifier (Arg1, Name_Entity);
9807 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9808 Ent := Entity (Expression (Arg1));
9810 if Rep_Item_Too_Early (Ent, N) then
9813 Ent := Underlying_Type (Ent);
9816 -- The only processing required is to link this item on to the
9817 -- list of rep items for the given entity. This is accomplished
9818 -- by the call to Rep_Item_Too_Late (when no error is detected
9819 -- and False is returned).
9821 if Rep_Item_Too_Late (Ent, N) then
9824 Set_Has_Gigi_Rep_Item (Ent);
9828 --------------------
9829 -- Unknown_Pragma --
9830 --------------------
9832 -- Should be impossible, since the case of an unknown pragma is
9833 -- separately processed before the case statement is entered.
9835 when Unknown_Pragma =>
9836 raise Program_Error;
9841 when Pragma_Exit => null;
9844 ---------------------------------
9845 -- Delay_Config_Pragma_Analyze --
9846 ---------------------------------
9848 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
9850 return Chars (N) = Name_Interrupt_State;
9851 end Delay_Config_Pragma_Analyze;
9853 -------------------------
9854 -- Get_Base_Subprogram --
9855 -------------------------
9857 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
9863 -- Follow subprogram renaming chain
9865 while Is_Subprogram (Result)
9867 (Is_Generic_Instance (Result)
9868 or else Nkind (Parent (Declaration_Node (Result))) =
9869 N_Subprogram_Renaming_Declaration)
9870 and then Present (Alias (Result))
9872 Result := Alias (Result);
9876 end Get_Base_Subprogram;
9878 -----------------------------------------
9879 -- Is_Non_Significant_Pragma_Reference --
9880 -----------------------------------------
9882 -- This function makes use of the following static table which indicates
9883 -- whether a given pragma is significant. A value of -1 in this table
9884 -- indicates that the reference is significant. A value of zero indicates
9885 -- than appearence as any argument is insignificant, a positive value
9886 -- indicates that appearence in that parameter position is significant.
9888 Sig_Flags : constant array (Pragma_Id) of Int :=
9889 (Pragma_AST_Entry => -1,
9890 Pragma_Abort_Defer => -1,
9891 Pragma_Ada_83 => -1,
9892 Pragma_Ada_95 => -1,
9893 Pragma_All_Calls_Remote => -1,
9894 Pragma_Annotate => -1,
9895 Pragma_Assert => -1,
9896 Pragma_Asynchronous => -1,
9898 Pragma_Atomic_Components => 0,
9899 Pragma_Attach_Handler => -1,
9900 Pragma_CPP_Class => 0,
9901 Pragma_CPP_Constructor => 0,
9902 Pragma_CPP_Virtual => 0,
9903 Pragma_CPP_Vtable => 0,
9904 Pragma_C_Pass_By_Copy => 0,
9905 Pragma_Comment => 0,
9906 Pragma_Common_Object => -1,
9907 Pragma_Compile_Time_Warning => -1,
9908 Pragma_Complex_Representation => 0,
9909 Pragma_Component_Alignment => -1,
9910 Pragma_Controlled => 0,
9911 Pragma_Convention => 0,
9912 Pragma_Convention_Identifier => 0,
9914 Pragma_Discard_Names => 0,
9915 Pragma_Elaborate => -1,
9916 Pragma_Elaborate_All => -1,
9917 Pragma_Elaborate_Body => -1,
9918 Pragma_Elaboration_Checks => -1,
9919 Pragma_Eliminate => -1,
9920 Pragma_Explicit_Overriding => -1,
9921 Pragma_Export => -1,
9922 Pragma_Export_Exception => -1,
9923 Pragma_Export_Function => -1,
9924 Pragma_Export_Object => -1,
9925 Pragma_Export_Procedure => -1,
9926 Pragma_Export_Value => -1,
9927 Pragma_Export_Valued_Procedure => -1,
9928 Pragma_Extend_System => -1,
9929 Pragma_Extensions_Allowed => -1,
9930 Pragma_External => -1,
9931 Pragma_External_Name_Casing => -1,
9932 Pragma_Finalize_Storage_Only => 0,
9933 Pragma_Float_Representation => 0,
9935 Pragma_Import => +2,
9936 Pragma_Import_Exception => 0,
9937 Pragma_Import_Function => 0,
9938 Pragma_Import_Object => 0,
9939 Pragma_Import_Procedure => 0,
9940 Pragma_Import_Valued_Procedure => 0,
9941 Pragma_Initialize_Scalars => -1,
9943 Pragma_Inline_Always => 0,
9944 Pragma_Inline_Generic => 0,
9945 Pragma_Inspection_Point => -1,
9946 Pragma_Interface => +2,
9947 Pragma_Interface_Name => +2,
9948 Pragma_Interrupt_Handler => -1,
9949 Pragma_Interrupt_Priority => -1,
9950 Pragma_Interrupt_State => -1,
9951 Pragma_Java_Constructor => -1,
9952 Pragma_Java_Interface => -1,
9953 Pragma_Keep_Names => 0,
9954 Pragma_License => -1,
9955 Pragma_Link_With => -1,
9956 Pragma_Linker_Alias => -1,
9957 Pragma_Linker_Options => -1,
9958 Pragma_Linker_Section => -1,
9960 Pragma_Locking_Policy => -1,
9961 Pragma_Long_Float => -1,
9962 Pragma_Machine_Attribute => -1,
9964 Pragma_Main_Storage => -1,
9965 Pragma_Memory_Size => -1,
9966 Pragma_No_Return => 0,
9967 Pragma_No_Run_Time => -1,
9968 Pragma_No_Strict_Aliasing => -1,
9969 Pragma_Normalize_Scalars => -1,
9970 Pragma_Obsolescent => 0,
9971 Pragma_Optimize => -1,
9972 Pragma_Optional_Overriding => -1,
9973 Pragma_Overriding => -1,
9976 Pragma_Passive => -1,
9977 Pragma_Polling => -1,
9978 Pragma_Persistent_Data => -1,
9979 Pragma_Persistent_Object => -1,
9980 Pragma_Preelaborate => -1,
9981 Pragma_Priority => -1,
9982 Pragma_Profile => 0,
9983 Pragma_Propagate_Exceptions => -1,
9984 Pragma_Psect_Object => -1,
9986 Pragma_Pure_Function => 0,
9987 Pragma_Queuing_Policy => -1,
9988 Pragma_Ravenscar => -1,
9989 Pragma_Remote_Call_Interface => -1,
9990 Pragma_Remote_Types => -1,
9991 Pragma_Restricted_Run_Time => -1,
9992 Pragma_Restriction_Warnings => -1,
9993 Pragma_Restrictions => -1,
9994 Pragma_Reviewable => -1,
9995 Pragma_Share_Generic => -1,
9996 Pragma_Shared => -1,
9997 Pragma_Shared_Passive => -1,
9998 Pragma_Source_File_Name => -1,
9999 Pragma_Source_File_Name_Project => -1,
10000 Pragma_Source_Reference => -1,
10001 Pragma_Storage_Size => -1,
10002 Pragma_Storage_Unit => -1,
10003 Pragma_Stream_Convert => -1,
10004 Pragma_Style_Checks => -1,
10005 Pragma_Subtitle => -1,
10006 Pragma_Suppress => 0,
10007 Pragma_Suppress_Exception_Locations => 0,
10008 Pragma_Suppress_All => -1,
10009 Pragma_Suppress_Debug_Info => 0,
10010 Pragma_Suppress_Initialization => 0,
10011 Pragma_System_Name => -1,
10012 Pragma_Task_Dispatching_Policy => -1,
10013 Pragma_Task_Info => -1,
10014 Pragma_Task_Name => -1,
10015 Pragma_Task_Storage => 0,
10016 Pragma_Thread_Body => +2,
10017 Pragma_Time_Slice => -1,
10018 Pragma_Title => -1,
10019 Pragma_Unchecked_Union => -1,
10020 Pragma_Unimplemented_Unit => -1,
10021 Pragma_Universal_Data => -1,
10022 Pragma_Unreferenced => -1,
10023 Pragma_Unreserve_All_Interrupts => -1,
10024 Pragma_Unsuppress => 0,
10025 Pragma_Use_VADS_Size => -1,
10026 Pragma_Validity_Checks => -1,
10027 Pragma_Volatile => 0,
10028 Pragma_Volatile_Components => 0,
10029 Pragma_Warnings => -1,
10030 Pragma_Weak_External => 0,
10031 Unknown_Pragma => 0);
10033 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
10041 if Nkind (P) /= N_Pragma_Argument_Association then
10045 C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
10055 A := First (Pragma_Argument_Associations (Parent (P)));
10056 for J in 1 .. C - 1 loop
10067 end Is_Non_Significant_Pragma_Reference;
10069 ------------------------------
10070 -- Is_Pragma_String_Literal --
10071 ------------------------------
10073 -- This function returns true if the corresponding pragma argument is
10074 -- a static string expression. These are the only cases in which string
10075 -- literals can appear as pragma arguments. We also allow a string
10076 -- literal as the first argument to pragma Assert (although it will
10077 -- of course always generate a type error).
10079 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
10080 Pragn : constant Node_Id := Parent (Par);
10081 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
10082 Pname : constant Name_Id := Chars (Pragn);
10088 N := First (Assoc);
10095 if Pname = Name_Assert then
10098 elsif Pname = Name_Export then
10101 elsif Pname = Name_Ident then
10104 elsif Pname = Name_Import then
10107 elsif Pname = Name_Interface_Name then
10110 elsif Pname = Name_Linker_Alias then
10113 elsif Pname = Name_Linker_Section then
10116 elsif Pname = Name_Machine_Attribute then
10119 elsif Pname = Name_Source_File_Name then
10122 elsif Pname = Name_Source_Reference then
10125 elsif Pname = Name_Title then
10128 elsif Pname = Name_Subtitle then
10134 end Is_Pragma_String_Literal;
10136 --------------------------------------
10137 -- Process_Compilation_Unit_Pragmas --
10138 --------------------------------------
10140 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
10142 -- A special check for pragma Suppress_All. This is a strange DEC
10143 -- pragma, strange because it comes at the end of the unit. If we
10144 -- have a pragma Suppress_All in the Pragmas_After of the current
10145 -- unit, then we insert a pragma Suppress (All_Checks) at the start
10146 -- of the context clause to ensure the correct processing.
10149 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
10153 if Present (PA) then
10155 while Present (P) loop
10156 if Chars (P) = Name_Suppress_All then
10157 Prepend_To (Context_Items (N),
10158 Make_Pragma (Sloc (P),
10159 Chars => Name_Suppress,
10160 Pragma_Argument_Associations => New_List (
10161 Make_Pragma_Argument_Association (Sloc (P),
10163 Make_Identifier (Sloc (P),
10164 Chars => Name_All_Checks)))));
10172 end Process_Compilation_Unit_Pragmas;
10174 --------------------------------
10175 -- Set_Encoded_Interface_Name --
10176 --------------------------------
10178 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
10179 Str : constant String_Id := Strval (S);
10180 Len : constant Int := String_Length (Str);
10185 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
10188 -- Stores encoded value of character code CC. The encoding we
10189 -- use an underscore followed by four lower case hex digits.
10191 procedure Encode is
10193 Store_String_Char (Get_Char_Code ('_'));
10195 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
10197 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
10199 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
10201 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
10204 -- Start of processing for Set_Encoded_Interface_Name
10207 -- If first character is asterisk, this is a link name, and we
10208 -- leave it completely unmodified. We also ignore null strings
10209 -- (the latter case happens only in error cases) and no encoding
10210 -- should occur for Java interface names.
10213 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
10216 Set_Interface_Name (E, S);
10221 CC := Get_String_Char (Str, J);
10223 exit when not In_Character_Range (CC);
10225 C := Get_Character (CC);
10227 exit when C /= '_' and then C /= '$'
10228 and then C not in '0' .. '9'
10229 and then C not in 'a' .. 'z'
10230 and then C not in 'A' .. 'Z';
10233 Set_Interface_Name (E, S);
10241 -- Here we need to encode. The encoding we use as follows:
10242 -- three underscores + four hex digits (lower case)
10246 for J in 1 .. String_Length (Str) loop
10247 CC := Get_String_Char (Str, J);
10249 if not In_Character_Range (CC) then
10252 C := Get_Character (CC);
10254 if C = '_' or else C = '$'
10255 or else C in '0' .. '9'
10256 or else C in 'a' .. 'z'
10257 or else C in 'A' .. 'Z'
10259 Store_String_Char (CC);
10266 Set_Interface_Name (E,
10267 Make_String_Literal (Sloc (S),
10268 Strval => End_String));
10270 end Set_Encoded_Interface_Name;
10272 -------------------
10273 -- Set_Unit_Name --
10274 -------------------
10276 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
10281 if Nkind (N) = N_Identifier
10282 and then Nkind (With_Item) = N_Identifier
10284 Set_Entity (N, Entity (With_Item));
10286 elsif Nkind (N) = N_Selected_Component then
10287 Change_Selected_Component_To_Expanded_Name (N);
10288 Set_Entity (N, Entity (With_Item));
10289 Set_Entity (Selector_Name (N), Entity (N));
10291 Pref := Prefix (N);
10292 Scop := Scope (Entity (N));
10294 while Nkind (Pref) = N_Selected_Component loop
10295 Change_Selected_Component_To_Expanded_Name (Pref);
10296 Set_Entity (Selector_Name (Pref), Scop);
10297 Set_Entity (Pref, Scop);
10298 Pref := Prefix (Pref);
10299 Scop := Scope (Scop);
10302 Set_Entity (Pref, Scop);
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