1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2004, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 -- This unit contains the semantic processing for all pragmas, both language
28 -- and implementation defined. For most pragmas, the parser only does the
29 -- most basic job of checking the syntax, so Sem_Prag also contains the code
30 -- to complete the syntax checks. Certain pragmas are handled partially or
31 -- completely by the parser (see Par.Prag for further details).
33 with Atree; use Atree;
34 with Casing; use Casing;
35 with Csets; use Csets;
36 with Debug; use Debug;
37 with Einfo; use Einfo;
38 with Elists; use Elists;
39 with Errout; use Errout;
40 with Expander; use Expander;
41 with Exp_Dist; use Exp_Dist;
42 with Fname; use Fname;
43 with Hostparm; use Hostparm;
45 with Lib.Writ; use Lib.Writ;
46 with Lib.Xref; use Lib.Xref;
47 with Namet; use Namet;
48 with Nlists; use Nlists;
49 with Nmake; use Nmake;
51 with Output; use Output;
52 with Restrict; use Restrict;
53 with Rident; use Rident;
54 with Rtsfind; use Rtsfind;
56 with Sem_Ch3; use Sem_Ch3;
57 with Sem_Ch8; use Sem_Ch8;
58 with Sem_Ch13; use Sem_Ch13;
59 with Sem_Disp; use Sem_Disp;
60 with Sem_Elim; use Sem_Elim;
61 with Sem_Eval; use Sem_Eval;
62 with Sem_Intr; use Sem_Intr;
63 with Sem_Mech; use Sem_Mech;
64 with Sem_Res; use Sem_Res;
65 with Sem_Type; use Sem_Type;
66 with Sem_Util; use Sem_Util;
67 with Sem_VFpt; use Sem_VFpt;
68 with Stand; use Stand;
69 with Sinfo; use Sinfo;
70 with Sinfo.CN; use Sinfo.CN;
71 with Sinput; use Sinput;
72 with Snames; use Snames;
73 with Stringt; use Stringt;
74 with Stylesw; use Stylesw;
75 with Targparm; use Targparm;
76 with Tbuild; use Tbuild;
78 with Uintp; use Uintp;
79 with Urealp; use Urealp;
80 with Validsw; use Validsw;
82 with GNAT.Spelling_Checker; use GNAT.Spelling_Checker;
84 package body Sem_Prag is
86 ----------------------------------------------
87 -- Common Handling of Import-Export Pragmas --
88 ----------------------------------------------
90 -- In the following section, a number of Import_xxx and Export_xxx
91 -- pragmas are defined by GNAT. These are compatible with the DEC
92 -- pragmas of the same name, and all have the following common
93 -- form and processing:
96 -- [Internal =>] LOCAL_NAME,
97 -- [, [External =>] EXTERNAL_SYMBOL]
98 -- [, other optional parameters ]);
101 -- [Internal =>] LOCAL_NAME,
102 -- [, [External =>] EXTERNAL_SYMBOL]
103 -- [, other optional parameters ]);
105 -- EXTERNAL_SYMBOL ::=
107 -- | static_string_EXPRESSION
109 -- The internal LOCAL_NAME designates the entity that is imported or
110 -- exported, and must refer to an entity in the current declarative
111 -- part (as required by the rules for LOCAL_NAME).
113 -- The external linker name is designated by the External parameter
114 -- if given, or the Internal parameter if not (if there is no External
115 -- parameter, the External parameter is a copy of the Internal name).
117 -- If the External parameter is given as a string, then this string
118 -- is treated as an external name (exactly as though it had been given
119 -- as an External_Name parameter for a normal Import pragma).
121 -- If the External parameter is given as an identifier (or there is no
122 -- External parameter, so that the Internal identifier is used), then
123 -- the external name is the characters of the identifier, translated
124 -- to all upper case letters for OpenVMS versions of GNAT, and to all
125 -- lower case letters for all other versions
127 -- Note: the external name specified or implied by any of these special
128 -- Import_xxx or Export_xxx pragmas override an external or link name
129 -- specified in a previous Import or Export pragma.
131 -- Note: these and all other DEC-compatible GNAT pragmas allow full
132 -- use of named notation, following the standard rules for subprogram
133 -- calls, i.e. parameters can be given in any order if named notation
134 -- is used, and positional and named notation can be mixed, subject to
135 -- the rule that all positional parameters must appear first.
137 -- Note: All these pragmas are implemented exactly following the DEC
138 -- design and implementation and are intended to be fully compatible
139 -- with the use of these pragmas in the DEC Ada compiler.
141 -------------------------------------
142 -- Local Subprograms and Variables --
143 -------------------------------------
145 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
146 -- This routine is used for possible casing adjustment of an explicit
147 -- external name supplied as a string literal (the node N), according
148 -- to the casing requirement of Opt.External_Name_Casing. If this is
149 -- set to As_Is, then the string literal is returned unchanged, but if
150 -- it is set to Uppercase or Lowercase, then a new string literal with
151 -- appropriate casing is constructed.
153 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
154 -- If Def_Id refers to a renamed subprogram, then the base subprogram
155 -- (the original one, following the renaming chain) is returned.
156 -- Otherwise the entity is returned unchanged. Should be in Einfo???
158 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
159 -- Place semantic information on the argument of an Elaborate or
160 -- Elaborate_All pragma. Entity name for unit and its parents is
161 -- taken from item in previous with_clause that mentions the unit.
163 -------------------------------
164 -- Adjust_External_Name_Case --
165 -------------------------------
167 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
171 -- Adjust case of literal if required
173 if Opt.External_Name_Exp_Casing = As_Is then
177 -- Copy existing string
183 for J in 1 .. String_Length (Strval (N)) loop
184 CC := Get_String_Char (Strval (N), J);
186 if Opt.External_Name_Exp_Casing = Uppercase
187 and then CC >= Get_Char_Code ('a')
188 and then CC <= Get_Char_Code ('z')
190 Store_String_Char (CC - 32);
192 elsif Opt.External_Name_Exp_Casing = Lowercase
193 and then CC >= Get_Char_Code ('A')
194 and then CC <= Get_Char_Code ('Z')
196 Store_String_Char (CC + 32);
199 Store_String_Char (CC);
204 Make_String_Literal (Sloc (N),
205 Strval => End_String);
207 end Adjust_External_Name_Case;
213 procedure Analyze_Pragma (N : Node_Id) is
214 Loc : constant Source_Ptr := Sloc (N);
217 Pragma_Exit : exception;
218 -- This exception is used to exit pragma processing completely. It
219 -- is used when an error is detected, and in other situations where
220 -- it is known that no further processing is required.
223 -- Number of pragma argument associations
229 -- First four pragma arguments (pragma argument association nodes,
230 -- or Empty if the corresponding argument does not exist).
232 procedure Check_Ada_83_Warning;
233 -- Issues a warning message for the current pragma if operating in Ada
234 -- 83 mode (used for language pragmas that are not a standard part of
235 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
238 procedure Check_Arg_Count (Required : Nat);
239 -- Check argument count for pragma is equal to given parameter.
240 -- If not, then issue an error message and raise Pragma_Exit.
242 -- Note: all routines whose name is Check_Arg_Is_xxx take an
243 -- argument Arg which can either be a pragma argument association,
244 -- in which case the check is applied to the expression of the
245 -- association or an expression directly.
247 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
248 -- Check the specified argument Arg to make sure that it is an
249 -- identifier. If not give error and raise Pragma_Exit.
251 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
252 -- Check the specified argument Arg to make sure that it is an
253 -- integer literal. If not give error and raise Pragma_Exit.
255 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
256 -- Check the specified argument Arg to make sure that it has the
257 -- proper syntactic form for a local name and meets the semantic
258 -- requirements for a local name. The local name is analyzed as
259 -- part of the processing for this call. In addition, the local
260 -- name is required to represent an entity at the library level.
262 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
263 -- Check the specified argument Arg to make sure that it has the
264 -- proper syntactic form for a local name and meets the semantic
265 -- requirements for a local name. The local name is analyzed as
266 -- part of the processing for this call.
268 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
269 -- Check the specified argument Arg to make sure that it is a valid
270 -- locking policy name. If not give error and raise Pragma_Exit.
272 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
273 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
274 -- Check the specified argument Arg to make sure that it is an
275 -- identifier whose name matches either N1 or N2 (or N3 if present).
276 -- If not then give error and raise Pragma_Exit.
278 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
279 -- Check the specified argument Arg to make sure that it is a valid
280 -- queuing policy name. If not give error and raise Pragma_Exit.
282 procedure Check_Arg_Is_Static_Expression
285 -- Check the specified argument Arg to make sure that it is a static
286 -- expression of the given type (i.e. it will be analyzed and resolved
287 -- using this type, which can be any valid argument to Resolve, e.g.
288 -- Any_Integer is OK). If not, given error and raise Pragma_Exit.
290 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
291 -- Check the specified argument Arg to make sure that it is a
292 -- string literal. If not give error and raise Pragma_Exit
294 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
295 -- Check the specified argument Arg to make sure that it is a valid
296 -- valid task dispatching policy name. If not give error and raise
299 procedure Check_At_Least_N_Arguments (N : Nat);
300 -- Check there are at least N arguments present
302 procedure Check_At_Most_N_Arguments (N : Nat);
303 -- Check there are no more than N arguments present
305 procedure Check_First_Subtype (Arg : Node_Id);
306 -- Checks that Arg, whose expression is an entity name referencing
307 -- a subtype, does not reference a type that is not a first subtype.
309 procedure Check_In_Main_Program;
310 -- Common checks for pragmas that appear within a main program
311 -- (Priority, Main_Storage, Time_Slice).
313 procedure Check_Interrupt_Or_Attach_Handler;
314 -- Common processing for first argument of pragma Interrupt_Handler
315 -- or pragma Attach_Handler.
317 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
318 -- Check that pragma appears in a declarative part, or in a package
319 -- specification, i.e. that it does not occur in a statement sequence
322 procedure Check_No_Identifier (Arg : Node_Id);
323 -- Checks that the given argument does not have an identifier. If
324 -- an identifier is present, then an error message is issued, and
325 -- Pragma_Exit is raised.
327 procedure Check_No_Identifiers;
328 -- Checks that none of the arguments to the pragma has an identifier.
329 -- If any argument has an identifier, then an error message is issued,
330 -- and Pragma_Exit is raised.
332 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
333 -- Checks if the given argument has an identifier, and if so, requires
334 -- it to match the given identifier name. If there is a non-matching
335 -- identifier, then an error message is given and Error_Pragmas raised.
337 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
338 -- Checks if the given argument has an identifier, and if so, requires
339 -- it to match the given identifier name. If there is a non-matching
340 -- identifier, then an error message is given and Error_Pragmas raised.
341 -- In this version of the procedure, the identifier name is given as
342 -- a string with lower case letters.
344 procedure Check_Static_Constraint (Constr : Node_Id);
345 -- Constr is a constraint from an N_Subtype_Indication node from a
346 -- component constraint in an Unchecked_Union type. This routine checks
347 -- that the constraint is static as required by the restrictions for
350 procedure Check_Valid_Configuration_Pragma;
351 -- Legality checks for placement of a configuration pragma
353 procedure Check_Valid_Library_Unit_Pragma;
354 -- Legality checks for library unit pragmas. A special case arises for
355 -- pragmas in generic instances that come from copies of the original
356 -- library unit pragmas in the generic templates. In the case of other
357 -- than library level instantiations these can appear in contexts which
358 -- would normally be invalid (they only apply to the original template
359 -- and to library level instantiations), and they are simply ignored,
360 -- which is implemented by rewriting them as null statements.
362 procedure Error_Pragma (Msg : String);
363 pragma No_Return (Error_Pragma);
364 -- Outputs error message for current pragma. The message contains an %
365 -- that will be replaced with the pragma name, and the flag is placed
366 -- on the pragma itself. Pragma_Exit is then raised.
368 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
369 pragma No_Return (Error_Pragma_Arg);
370 -- Outputs error message for current pragma. The message may contain
371 -- a % that will be replaced with the pragma name. The parameter Arg
372 -- may either be a pragma argument association, in which case the flag
373 -- is placed on the expression of this association, or an expression,
374 -- in which case the flag is placed directly on the expression. The
375 -- message is placed using Error_Msg_N, so the message may also contain
376 -- an & insertion character which will reference the given Arg value.
377 -- After placing the message, Pragma_Exit is raised.
379 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
380 pragma No_Return (Error_Pragma_Arg);
381 -- Similar to above form of Error_Pragma_Arg except that two messages
382 -- are provided, the second is a continuation comment starting with \.
384 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
385 pragma No_Return (Error_Pragma_Arg_Ident);
386 -- Outputs error message for current pragma. The message may contain
387 -- a % that will be replaced with the pragma name. The parameter Arg
388 -- must be a pragma argument association with a non-empty identifier
389 -- (i.e. its Chars field must be set), and the error message is placed
390 -- on the identifier. The message is placed using Error_Msg_N so
391 -- the message may also contain an & insertion character which will
392 -- reference the identifier. After placing the message, Pragma_Exit
395 function Find_Lib_Unit_Name return Entity_Id;
396 -- Used for a library unit pragma to find the entity to which the
397 -- library unit pragma applies, returns the entity found.
399 procedure Find_Program_Unit_Name (Id : Node_Id);
400 -- If the pragma is a compilation unit pragma, the id must denote the
401 -- compilation unit in the same compilation, and the pragma must appear
402 -- in the list of preceding or trailing pragmas. If it is a program
403 -- unit pragma that is not a compilation unit pragma, then the
404 -- identifier must be visible.
406 type Name_List is array (Natural range <>) of Name_Id;
407 type Args_List is array (Natural range <>) of Node_Id;
408 procedure Gather_Associations
410 Args : out Args_List);
411 -- This procedure is used to gather the arguments for a pragma that
412 -- permits arbitrary ordering of parameters using the normal rules
413 -- for named and positional parameters. The Names argument is a list
414 -- of Name_Id values that corresponds to the allowed pragma argument
415 -- association identifiers in order. The result returned in Args is
416 -- a list of corresponding expressions that are the pragma arguments.
417 -- Note that this is a list of expressions, not of pragma argument
418 -- associations (Gather_Associations has completely checked all the
419 -- optional identifiers when it returns). An entry in Args is Empty
420 -- on return if the corresponding argument is not present.
422 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
423 -- All the routines that check pragma arguments take either a pragma
424 -- argument association (in which case the expression of the argument
425 -- association is checked), or the expression directly. The function
426 -- Get_Pragma_Arg is a utility used to deal with these two cases. If
427 -- Arg is a pragma argument association node, then its expression is
428 -- returned, otherwise Arg is returned unchanged.
430 procedure GNAT_Pragma;
431 -- Called for all GNAT defined pragmas to note the use of the feature,
432 -- and also check the relevant restriction (No_Implementation_Pragmas).
434 function Is_Before_First_Decl
435 (Pragma_Node : Node_Id;
436 Decls : List_Id) return Boolean;
437 -- Return True if Pragma_Node is before the first declarative item in
438 -- Decls where Decls is the list of declarative items.
440 function Is_Configuration_Pragma return Boolean;
441 -- Deterermines if the placement of the current pragma is appropriate
442 -- for a configuration pragma (precedes the current compilation unit)
444 procedure Pragma_Misplaced;
445 -- Issue fatal error message for misplaced pragma
447 procedure Process_Atomic_Shared_Volatile;
448 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
449 -- Shared is an obsolete Ada 83 pragma, treated as being identical
450 -- in effect to pragma Atomic.
452 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
453 -- Common procesing for Convention, Interface, Import and Export.
454 -- Checks first two arguments of pragma, and sets the appropriate
455 -- convention value in the specified entity or entities. On return
456 -- C is the convention, E is the referenced entity.
458 procedure Process_Extended_Import_Export_Exception_Pragma
459 (Arg_Internal : Node_Id;
460 Arg_External : Node_Id;
463 -- Common processing for the pragmas Import/Export_Exception.
464 -- The three arguments correspond to the three named parameters of
465 -- the pragma. An argument is empty if the corresponding parameter
466 -- is not present in the pragma.
468 procedure Process_Extended_Import_Export_Object_Pragma
469 (Arg_Internal : Node_Id;
470 Arg_External : Node_Id;
472 -- Common processing for the pragmass Import/Export_Object.
473 -- The three arguments correspond to the three named parameters
474 -- of the pragmas. An argument is empty if the corresponding
475 -- parameter is not present in the pragma.
477 procedure Process_Extended_Import_Export_Internal_Arg
478 (Arg_Internal : Node_Id := Empty);
479 -- Common processing for all extended Import and Export pragmas. The
480 -- argument is the pragma parameter for the Internal argument. If
481 -- Arg_Internal is empty or inappropriate, an error message is posted.
482 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
483 -- set to identify the referenced entity.
485 procedure Process_Extended_Import_Export_Subprogram_Pragma
486 (Arg_Internal : Node_Id;
487 Arg_External : Node_Id;
488 Arg_Parameter_Types : Node_Id;
489 Arg_Result_Type : Node_Id := Empty;
490 Arg_Mechanism : Node_Id;
491 Arg_Result_Mechanism : Node_Id := Empty;
492 Arg_First_Optional_Parameter : Node_Id := Empty);
493 -- Common processing for all extended Import and Export pragmas
494 -- applying to subprograms. The caller omits any arguments that do
495 -- bnot apply to the pragma in question (for example, Arg_Result_Type
496 -- can be non-Empty only in the Import_Function and Export_Function
497 -- cases). The argument names correspond to the allowed pragma
498 -- association identifiers.
500 procedure Process_Generic_List;
501 -- Common processing for Share_Generic and Inline_Generic
503 procedure Process_Import_Or_Interface;
504 -- Common processing for Import of Interface
506 procedure Process_Inline (Active : Boolean);
507 -- Common processing for Inline and Inline_Always. The parameter
508 -- indicates if the inline pragma is active, i.e. if it should
509 -- actually cause inlining to occur.
511 procedure Process_Interface_Name
512 (Subprogram_Def : Entity_Id;
515 -- Given the last two arguments of pragma Import, pragma Export, or
516 -- pragma Interface_Name, performs validity checks and sets the
517 -- Interface_Name field of the given subprogram entity to the
518 -- appropriate external or link name, depending on the arguments
519 -- given. Ext_Arg is always present, but Link_Arg may be missing.
520 -- Note that Ext_Arg may represent the Link_Name if Link_Arg is
521 -- missing, and appropriate named notation is used for Ext_Arg.
522 -- If neither Ext_Arg nor Link_Arg is present, the interface name
523 -- is set to the default from the subprogram name.
525 procedure Process_Interrupt_Or_Attach_Handler;
526 -- Common processing for Interrupt and Attach_Handler pragmas
528 procedure Process_Restrictions_Or_Restriction_Warnings;
529 -- Common processing for Restrictions and Restriction_Warnings pragmas
531 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
532 -- Common processing for Suppress and Unsuppress. The boolean parameter
533 -- Suppress_Case is True for the Suppress case, and False for the
536 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
537 -- This procedure sets the Is_Exported flag for the given entity,
538 -- checking that the entity was not previously imported. Arg is
539 -- the argument that specified the entity. A check is also made
540 -- for exporting inappropriate entities.
542 procedure Set_Extended_Import_Export_External_Name
543 (Internal_Ent : Entity_Id;
544 Arg_External : Node_Id);
545 -- Common processing for all extended import export pragmas. The first
546 -- argument, Internal_Ent, is the internal entity, which has already
547 -- been checked for validity by the caller. Arg_External is from the
548 -- Import or Export pragma, and may be null if no External parameter
549 -- was present. If Arg_External is present and is a non-null string
550 -- (a null string is treated as the default), then the Interface_Name
551 -- field of Internal_Ent is set appropriately.
553 procedure Set_Imported (E : Entity_Id);
554 -- This procedure sets the Is_Imported flag for the given entity,
555 -- checking that it is not previously exported or imported.
557 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
558 -- Mech is a parameter passing mechanism (see Import_Function syntax
559 -- for MECHANISM_NAME). This routine checks that the mechanism argument
560 -- has the right form, and if not issues an error message. If the
561 -- argument has the right form then the Mechanism field of Ent is
562 -- set appropriately.
564 --------------------------
565 -- Check_Ada_83_Warning --
566 --------------------------
568 procedure Check_Ada_83_Warning is
570 if Ada_83 and then Comes_From_Source (N) then
571 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
573 end Check_Ada_83_Warning;
575 ---------------------
576 -- Check_Arg_Count --
577 ---------------------
579 procedure Check_Arg_Count (Required : Nat) is
581 if Arg_Count /= Required then
582 Error_Pragma ("wrong number of arguments for pragma%");
586 -----------------------------
587 -- Check_Arg_Is_Identifier --
588 -----------------------------
590 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
591 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
594 if Nkind (Argx) /= N_Identifier then
596 ("argument for pragma% must be identifier", Argx);
598 end Check_Arg_Is_Identifier;
600 ----------------------------------
601 -- Check_Arg_Is_Integer_Literal --
602 ----------------------------------
604 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
605 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
608 if Nkind (Argx) /= N_Integer_Literal then
610 ("argument for pragma% must be integer literal", Argx);
612 end Check_Arg_Is_Integer_Literal;
614 -------------------------------------------
615 -- Check_Arg_Is_Library_Level_Local_Name --
616 -------------------------------------------
620 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
621 -- | library_unit_NAME
623 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
625 Check_Arg_Is_Local_Name (Arg);
627 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
628 and then Comes_From_Source (N)
631 ("argument for pragma% must be library level entity", Arg);
633 end Check_Arg_Is_Library_Level_Local_Name;
635 -----------------------------
636 -- Check_Arg_Is_Local_Name --
637 -----------------------------
641 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
642 -- | library_unit_NAME
644 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
645 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
650 if Nkind (Argx) not in N_Direct_Name
651 and then (Nkind (Argx) /= N_Attribute_Reference
652 or else Present (Expressions (Argx))
653 or else Nkind (Prefix (Argx)) /= N_Identifier)
654 and then (not Is_Entity_Name (Argx)
655 or else not Is_Compilation_Unit (Entity (Argx)))
657 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
660 if Is_Entity_Name (Argx)
661 and then Scope (Entity (Argx)) /= Current_Scope
664 ("pragma% argument must be in same declarative part", Arg);
666 end Check_Arg_Is_Local_Name;
668 ---------------------------------
669 -- Check_Arg_Is_Locking_Policy --
670 ---------------------------------
672 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
673 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
676 Check_Arg_Is_Identifier (Argx);
678 if not Is_Locking_Policy_Name (Chars (Argx)) then
680 ("& is not a valid locking policy name", Argx);
682 end Check_Arg_Is_Locking_Policy;
684 -------------------------
685 -- Check_Arg_Is_One_Of --
686 -------------------------
688 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
689 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
692 Check_Arg_Is_Identifier (Argx);
694 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
695 Error_Msg_Name_2 := N1;
696 Error_Msg_Name_3 := N2;
697 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
699 end Check_Arg_Is_One_Of;
701 procedure Check_Arg_Is_One_Of
703 N1, N2, N3 : Name_Id)
705 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
708 Check_Arg_Is_Identifier (Argx);
710 if Chars (Argx) /= N1
711 and then Chars (Argx) /= N2
712 and then Chars (Argx) /= N3
714 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
716 end Check_Arg_Is_One_Of;
718 ---------------------------------
719 -- Check_Arg_Is_Queuing_Policy --
720 ---------------------------------
722 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
723 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
726 Check_Arg_Is_Identifier (Argx);
728 if not Is_Queuing_Policy_Name (Chars (Argx)) then
730 ("& is not a valid queuing policy name", Argx);
732 end Check_Arg_Is_Queuing_Policy;
734 ------------------------------------
735 -- Check_Arg_Is_Static_Expression --
736 ------------------------------------
738 procedure Check_Arg_Is_Static_Expression
742 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
745 Analyze_And_Resolve (Argx, Typ);
747 if Is_OK_Static_Expression (Argx) then
750 elsif Etype (Argx) = Any_Type then
753 -- An interesting special case, if we have a string literal and
754 -- we are in Ada 83 mode, then we allow it even though it will
755 -- not be flagged as static. This allows the use of Ada 95
756 -- pragmas like Import in Ada 83 mode. They will of course be
757 -- flagged with warnings as usual, but will not cause errors.
759 elsif Ada_83 and then Nkind (Argx) = N_String_Literal then
762 -- Static expression that raises Constraint_Error. This has
763 -- already been flagged, so just exit from pragma processing.
765 elsif Is_Static_Expression (Argx) then
768 -- Finally, we have a real error
771 Error_Msg_Name_1 := Chars (N);
773 ("argument for pragma% must be a static expression!", Argx);
776 end Check_Arg_Is_Static_Expression;
778 ---------------------------------
779 -- Check_Arg_Is_String_Literal --
780 ---------------------------------
782 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
783 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
786 if Nkind (Argx) /= N_String_Literal then
788 ("argument for pragma% must be string literal", Argx);
791 end Check_Arg_Is_String_Literal;
793 ------------------------------------------
794 -- Check_Arg_Is_Task_Dispatching_Policy --
795 ------------------------------------------
797 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
798 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
801 Check_Arg_Is_Identifier (Argx);
803 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
805 ("& is not a valid task dispatching policy name", Argx);
807 end Check_Arg_Is_Task_Dispatching_Policy;
809 --------------------------------
810 -- Check_At_Least_N_Arguments --
811 --------------------------------
813 procedure Check_At_Least_N_Arguments (N : Nat) is
815 if Arg_Count < N then
816 Error_Pragma ("too few arguments for pragma%");
818 end Check_At_Least_N_Arguments;
820 -------------------------------
821 -- Check_At_Most_N_Arguments --
822 -------------------------------
824 procedure Check_At_Most_N_Arguments (N : Nat) is
828 if Arg_Count > N then
833 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
836 end Check_At_Most_N_Arguments;
838 -------------------------
839 -- Check_First_Subtype --
840 -------------------------
842 procedure Check_First_Subtype (Arg : Node_Id) is
843 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
846 if not Is_First_Subtype (Entity (Argx)) then
848 ("pragma% cannot apply to subtype", Argx);
850 end Check_First_Subtype;
852 ---------------------------
853 -- Check_In_Main_Program --
854 ---------------------------
856 procedure Check_In_Main_Program is
857 P : constant Node_Id := Parent (N);
860 -- Must be at in subprogram body
862 if Nkind (P) /= N_Subprogram_Body then
863 Error_Pragma ("% pragma allowed only in subprogram");
865 -- Otherwise warn if obviously not main program
867 elsif Present (Parameter_Specifications (Specification (P)))
868 or else not Is_Compilation_Unit (Defining_Entity (P))
870 Error_Msg_Name_1 := Chars (N);
872 ("?pragma% is only effective in main program", N);
874 end Check_In_Main_Program;
876 ---------------------------------------
877 -- Check_Interrupt_Or_Attach_Handler --
878 ---------------------------------------
880 procedure Check_Interrupt_Or_Attach_Handler is
881 Arg1_X : constant Node_Id := Expression (Arg1);
886 if not Is_Entity_Name (Arg1_X) then
888 ("argument of pragma% must be entity name", Arg1);
890 elsif Prag_Id = Pragma_Interrupt_Handler then
891 Check_Restriction (No_Dynamic_Interrupts, N);
895 Handler_Proc : Entity_Id := Empty;
896 Proc_Scope : Entity_Id;
897 Found : Boolean := False;
900 if not Is_Overloaded (Arg1_X) then
901 Handler_Proc := Entity (Arg1_X);
906 Index : Interp_Index;
909 Get_First_Interp (Arg1_X, Index, It);
910 while Present (It.Nam) loop
911 Handler_Proc := It.Nam;
913 if Ekind (Handler_Proc) = E_Procedure
914 and then No (First_Formal (Handler_Proc))
918 Set_Entity (Arg1_X, Handler_Proc);
919 Set_Is_Overloaded (Arg1_X, False);
922 ("ambiguous handler name for pragma% ", Arg1);
926 Get_Next_Interp (Index, It);
931 ("argument of pragma% must be parameterless procedure",
934 Handler_Proc := Entity (Arg1_X);
939 Proc_Scope := Scope (Handler_Proc);
941 -- On AAMP only, a pragma Interrupt_Handler is supported for
942 -- nonprotected parameterless procedures.
945 and then Prag_Id = Pragma_Interrupt_Handler
947 if Ekind (Handler_Proc) /= E_Procedure then
949 ("argument of pragma% must be a procedure", Arg1);
952 elsif Ekind (Handler_Proc) /= E_Procedure
953 or else Ekind (Proc_Scope) /= E_Protected_Type
956 ("argument of pragma% must be protected procedure", Arg1);
959 if (not AAMP_On_Target or else Prag_Id = Pragma_Attach_Handler)
960 and then Ekind (Proc_Scope) = E_Protected_Type
963 Protected_Definition (Parent (Proc_Scope))
965 Error_Pragma ("pragma% must be in protected definition");
969 if not Is_Library_Level_Entity (Proc_Scope)
970 or else (AAMP_On_Target
971 and then not Is_Library_Level_Entity (Handler_Proc))
974 ("pragma% requires library-level entity", Arg1);
977 if Present (First_Formal (Handler_Proc)) then
979 ("argument of pragma% must be parameterless procedure",
983 end Check_Interrupt_Or_Attach_Handler;
985 -------------------------------------------
986 -- Check_Is_In_Decl_Part_Or_Package_Spec --
987 -------------------------------------------
989 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
998 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1001 elsif Nkind (P) = N_Package_Specification then
1004 elsif Nkind (P) = N_Block_Statement then
1007 -- Note: the following tests seem a little peculiar, because
1008 -- they test for bodies, but if we were in the statement part
1009 -- of the body, we would already have hit the handled statement
1010 -- sequence, so the only way we get here is by being in the
1011 -- declarative part of the body.
1013 elsif Nkind (P) = N_Subprogram_Body
1014 or else Nkind (P) = N_Package_Body
1015 or else Nkind (P) = N_Task_Body
1016 or else Nkind (P) = N_Entry_Body
1024 Error_Pragma ("pragma% is not in declarative part or package spec");
1025 end Check_Is_In_Decl_Part_Or_Package_Spec;
1027 -------------------------
1028 -- Check_No_Identifier --
1029 -------------------------
1031 procedure Check_No_Identifier (Arg : Node_Id) is
1033 if Chars (Arg) /= No_Name then
1034 Error_Pragma_Arg_Ident
1035 ("pragma% does not permit identifier& here", Arg);
1037 end Check_No_Identifier;
1039 --------------------------
1040 -- Check_No_Identifiers --
1041 --------------------------
1043 procedure Check_No_Identifiers is
1047 if Arg_Count > 0 then
1050 while Present (Arg_Node) loop
1051 Check_No_Identifier (Arg_Node);
1055 end Check_No_Identifiers;
1057 -------------------------------
1058 -- Check_Optional_Identifier --
1059 -------------------------------
1061 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1063 if Present (Arg) and then Chars (Arg) /= No_Name then
1064 if Chars (Arg) /= Id then
1065 Error_Msg_Name_1 := Chars (N);
1066 Error_Msg_Name_2 := Id;
1067 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1071 end Check_Optional_Identifier;
1073 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1075 Name_Buffer (1 .. Id'Length) := Id;
1076 Name_Len := Id'Length;
1077 Check_Optional_Identifier (Arg, Name_Find);
1078 end Check_Optional_Identifier;
1080 -----------------------------
1081 -- Check_Static_Constraint --
1082 -----------------------------
1084 -- Note: for convenience in writing this procedure, in addition to
1085 -- the officially (i.e. by spec) allowed argument which is always
1086 -- a constraint, it also allows ranges and discriminant associations.
1087 -- Above is not clear ???
1089 procedure Check_Static_Constraint (Constr : Node_Id) is
1091 --------------------
1092 -- Require_Static --
1093 --------------------
1095 procedure Require_Static (E : Node_Id);
1096 -- Require given expression to be static expression
1098 procedure Require_Static (E : Node_Id) is
1100 if not Is_OK_Static_Expression (E) then
1101 Flag_Non_Static_Expr
1102 ("non-static constraint not allowed in Unchecked_Union!", E);
1107 -- Start of processing for Check_Static_Constraint
1110 case Nkind (Constr) is
1111 when N_Discriminant_Association =>
1112 Require_Static (Expression (Constr));
1115 Require_Static (Low_Bound (Constr));
1116 Require_Static (High_Bound (Constr));
1118 when N_Attribute_Reference =>
1119 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1120 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1122 when N_Range_Constraint =>
1123 Check_Static_Constraint (Range_Expression (Constr));
1125 when N_Index_Or_Discriminant_Constraint =>
1127 IDC : Entity_Id := First (Constraints (Constr));
1129 while Present (IDC) loop
1130 Check_Static_Constraint (IDC);
1138 end Check_Static_Constraint;
1140 --------------------------------------
1141 -- Check_Valid_Configuration_Pragma --
1142 --------------------------------------
1144 -- A configuration pragma must appear in the context clause of
1145 -- a compilation unit, at the start of the list (i.e. only other
1146 -- pragmas may precede it).
1148 procedure Check_Valid_Configuration_Pragma is
1150 if not Is_Configuration_Pragma then
1151 Error_Pragma ("incorrect placement for configuration pragma%");
1153 end Check_Valid_Configuration_Pragma;
1155 -------------------------------------
1156 -- Check_Valid_Library_Unit_Pragma --
1157 -------------------------------------
1159 procedure Check_Valid_Library_Unit_Pragma is
1161 Parent_Node : Node_Id;
1162 Unit_Name : Entity_Id;
1163 Unit_Kind : Node_Kind;
1164 Unit_Node : Node_Id;
1165 Sindex : Source_File_Index;
1168 if not Is_List_Member (N) then
1172 Plist := List_Containing (N);
1173 Parent_Node := Parent (Plist);
1175 if Parent_Node = Empty then
1178 -- Case of pragma appearing after a compilation unit. In this
1179 -- case it must have an argument with the corresponding name
1180 -- and must be part of the following pragmas of its parent.
1182 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1183 if Plist /= Pragmas_After (Parent_Node) then
1186 elsif Arg_Count = 0 then
1188 ("argument required if outside compilation unit");
1191 Check_No_Identifiers;
1192 Check_Arg_Count (1);
1193 Unit_Node := Unit (Parent (Parent_Node));
1194 Unit_Kind := Nkind (Unit_Node);
1196 Analyze (Expression (Arg1));
1198 if Unit_Kind = N_Generic_Subprogram_Declaration
1199 or else Unit_Kind = N_Subprogram_Declaration
1201 Unit_Name := Defining_Entity (Unit_Node);
1203 elsif Unit_Kind = N_Function_Instantiation
1204 or else Unit_Kind = N_Package_Instantiation
1205 or else Unit_Kind = N_Procedure_Instantiation
1207 Unit_Name := Defining_Entity (Unit_Node);
1210 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1213 if Chars (Unit_Name) /=
1214 Chars (Entity (Expression (Arg1)))
1217 ("pragma% argument is not current unit name", Arg1);
1220 if Ekind (Unit_Name) = E_Package
1221 and then Present (Renamed_Entity (Unit_Name))
1223 Error_Pragma ("pragma% not allowed for renamed package");
1227 -- Pragma appears other than after a compilation unit
1230 -- Here we check for the generic instantiation case and also
1231 -- for the case of processing a generic formal package. We
1232 -- detect these cases by noting that the Sloc on the node
1233 -- does not belong to the current compilation unit.
1235 Sindex := Source_Index (Current_Sem_Unit);
1237 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1238 Rewrite (N, Make_Null_Statement (Loc));
1241 -- If before first declaration, the pragma applies to the
1242 -- enclosing unit, and the name if present must be this name.
1244 elsif Is_Before_First_Decl (N, Plist) then
1245 Unit_Node := Unit_Declaration_Node (Current_Scope);
1246 Unit_Kind := Nkind (Unit_Node);
1248 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1251 elsif Unit_Kind = N_Subprogram_Body
1252 and then not Acts_As_Spec (Unit_Node)
1256 elsif Nkind (Parent_Node) = N_Package_Body then
1259 elsif Nkind (Parent_Node) = N_Package_Specification
1260 and then Plist = Private_Declarations (Parent_Node)
1264 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1265 or else Nkind (Parent_Node)
1266 = N_Generic_Subprogram_Declaration)
1267 and then Plist = Generic_Formal_Declarations (Parent_Node)
1271 elsif Arg_Count > 0 then
1272 Analyze (Expression (Arg1));
1274 if Entity (Expression (Arg1)) /= Current_Scope then
1276 ("name in pragma% must be enclosing unit", Arg1);
1279 -- It is legal to have no argument in this context
1285 -- Error if not before first declaration. This is because a
1286 -- library unit pragma argument must be the name of a library
1287 -- unit (RM 10.1.5(7)), but the only names permitted in this
1288 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1289 -- generic subprogram declarations or generic instantiations.
1293 ("pragma% misplaced, must be before first declaration");
1297 end Check_Valid_Library_Unit_Pragma;
1303 procedure Error_Pragma (Msg : String) is
1305 Error_Msg_Name_1 := Chars (N);
1306 Error_Msg_N (Msg, N);
1310 ----------------------
1311 -- Error_Pragma_Arg --
1312 ----------------------
1314 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1316 Error_Msg_Name_1 := Chars (N);
1317 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1319 end Error_Pragma_Arg;
1321 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1323 Error_Msg_Name_1 := Chars (N);
1324 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1325 Error_Pragma_Arg (Msg2, Arg);
1326 end Error_Pragma_Arg;
1328 ----------------------------
1329 -- Error_Pragma_Arg_Ident --
1330 ----------------------------
1332 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1334 Error_Msg_Name_1 := Chars (N);
1335 Error_Msg_N (Msg, Arg);
1337 end Error_Pragma_Arg_Ident;
1339 ------------------------
1340 -- Find_Lib_Unit_Name --
1341 ------------------------
1343 function Find_Lib_Unit_Name return Entity_Id is
1345 -- Return inner compilation unit entity, for case of nested
1346 -- categorization pragmas. This happens in generic unit.
1348 if Nkind (Parent (N)) = N_Package_Specification
1349 and then Defining_Entity (Parent (N)) /= Current_Scope
1351 return Defining_Entity (Parent (N));
1353 return Current_Scope;
1355 end Find_Lib_Unit_Name;
1357 ----------------------------
1358 -- Find_Program_Unit_Name --
1359 ----------------------------
1361 procedure Find_Program_Unit_Name (Id : Node_Id) is
1362 Unit_Name : Entity_Id;
1363 Unit_Kind : Node_Kind;
1364 P : constant Node_Id := Parent (N);
1367 if Nkind (P) = N_Compilation_Unit then
1368 Unit_Kind := Nkind (Unit (P));
1370 if Unit_Kind = N_Subprogram_Declaration
1371 or else Unit_Kind = N_Package_Declaration
1372 or else Unit_Kind in N_Generic_Declaration
1374 Unit_Name := Defining_Entity (Unit (P));
1376 if Chars (Id) = Chars (Unit_Name) then
1377 Set_Entity (Id, Unit_Name);
1378 Set_Etype (Id, Etype (Unit_Name));
1380 Set_Etype (Id, Any_Type);
1382 ("cannot find program unit referenced by pragma%");
1386 Set_Etype (Id, Any_Type);
1387 Error_Pragma ("pragma% inapplicable to this unit");
1394 end Find_Program_Unit_Name;
1396 -------------------------
1397 -- Gather_Associations --
1398 -------------------------
1400 procedure Gather_Associations
1402 Args : out Args_List)
1407 -- Initialize all parameters to Empty
1409 for J in Args'Range loop
1413 -- That's all we have to do if there are no argument associations
1415 if No (Pragma_Argument_Associations (N)) then
1419 -- Otherwise first deal with any positional parameters present
1421 Arg := First (Pragma_Argument_Associations (N));
1423 for Index in Args'Range loop
1424 exit when No (Arg) or else Chars (Arg) /= No_Name;
1425 Args (Index) := Expression (Arg);
1429 -- Positional parameters all processed, if any left, then we
1430 -- have too many positional parameters.
1432 if Present (Arg) and then Chars (Arg) = No_Name then
1434 ("too many positional associations for pragma%", Arg);
1437 -- Process named parameters if any are present
1439 while Present (Arg) loop
1440 if Chars (Arg) = No_Name then
1442 ("positional association cannot follow named association",
1446 for Index in Names'Range loop
1447 if Names (Index) = Chars (Arg) then
1448 if Present (Args (Index)) then
1450 ("duplicate argument association for pragma%", Arg);
1452 Args (Index) := Expression (Arg);
1457 if Index = Names'Last then
1458 Error_Msg_Name_1 := Chars (N);
1459 Error_Msg_N ("pragma% does not allow & argument", Arg);
1461 -- Check for possible misspelling
1463 for Index1 in Names'Range loop
1464 if Is_Bad_Spelling_Of
1465 (Get_Name_String (Chars (Arg)),
1466 Get_Name_String (Names (Index1)))
1468 Error_Msg_Name_1 := Names (Index1);
1469 Error_Msg_N ("\possible misspelling of%", Arg);
1481 end Gather_Associations;
1483 --------------------
1484 -- Get_Pragma_Arg --
1485 --------------------
1487 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
1489 if Nkind (Arg) = N_Pragma_Argument_Association then
1490 return Expression (Arg);
1500 procedure GNAT_Pragma is
1502 Check_Restriction (No_Implementation_Pragmas, N);
1505 --------------------------
1506 -- Is_Before_First_Decl --
1507 --------------------------
1509 function Is_Before_First_Decl
1510 (Pragma_Node : Node_Id;
1511 Decls : List_Id) return Boolean
1513 Item : Node_Id := First (Decls);
1516 -- Only other pragmas can come before this pragma
1519 if No (Item) or else Nkind (Item) /= N_Pragma then
1522 elsif Item = Pragma_Node then
1528 end Is_Before_First_Decl;
1530 -----------------------------
1531 -- Is_Configuration_Pragma --
1532 -----------------------------
1534 -- A configuration pragma must appear in the context clause of
1535 -- a compilation unit, at the start of the list (i.e. only other
1536 -- pragmas may precede it).
1538 function Is_Configuration_Pragma return Boolean is
1539 Lis : constant List_Id := List_Containing (N);
1540 Par : constant Node_Id := Parent (N);
1544 -- If no parent, then we are in the configuration pragma file,
1545 -- so the placement is definitely appropriate.
1550 -- Otherwise we must be in the context clause of a compilation unit
1551 -- and the only thing allowed before us in the context list is more
1552 -- configuration pragmas.
1554 elsif Nkind (Par) = N_Compilation_Unit
1555 and then Context_Items (Par) = Lis
1562 elsif Nkind (Prg) /= N_Pragma then
1572 end Is_Configuration_Pragma;
1574 ----------------------
1575 -- Pragma_Misplaced --
1576 ----------------------
1578 procedure Pragma_Misplaced is
1580 Error_Pragma ("incorrect placement of pragma%");
1581 end Pragma_Misplaced;
1583 ------------------------------------
1584 -- Process Atomic_Shared_Volatile --
1585 ------------------------------------
1587 procedure Process_Atomic_Shared_Volatile is
1595 Check_Ada_83_Warning;
1596 Check_No_Identifiers;
1597 Check_Arg_Count (1);
1598 Check_Arg_Is_Local_Name (Arg1);
1599 E_Id := Expression (Arg1);
1601 if Etype (E_Id) = Any_Type then
1606 D := Declaration_Node (E);
1610 if Rep_Item_Too_Early (E, N)
1612 Rep_Item_Too_Late (E, N)
1616 Check_First_Subtype (Arg1);
1619 if Prag_Id /= Pragma_Volatile then
1621 Set_Is_Atomic (Underlying_Type (E));
1624 -- Attribute belongs on the base type. If the
1625 -- view of the type is currently private, it also
1626 -- belongs on the underlying type.
1628 Set_Is_Volatile (Base_Type (E));
1629 Set_Is_Volatile (Underlying_Type (E));
1631 Set_Treat_As_Volatile (E);
1632 Set_Treat_As_Volatile (Underlying_Type (E));
1634 elsif K = N_Object_Declaration
1635 or else (K = N_Component_Declaration
1636 and then Original_Record_Component (E) = E)
1638 if Rep_Item_Too_Late (E, N) then
1642 if Prag_Id /= Pragma_Volatile then
1645 -- If the object declaration has an explicit
1646 -- initialization, a temporary may have to be
1647 -- created to hold the expression, to insure
1648 -- that access to the object remain atomic.
1650 if Nkind (Parent (E)) = N_Object_Declaration
1651 and then Present (Expression (Parent (E)))
1653 Set_Has_Delayed_Freeze (E);
1656 -- An interesting improvement here. If an object of type X
1657 -- is declared atomic, and the type X is not atomic, that's
1658 -- a pity, since it may not have appropraite alignment etc.
1659 -- We can rescue this in the special case where the object
1660 -- and type are in the same unit by just setting the type
1661 -- as atomic, so that the back end will process it as atomic.
1663 Utyp := Underlying_Type (Etype (E));
1666 and then Sloc (E) > No_Location
1667 and then Sloc (Utyp) > No_Location
1669 Get_Source_File_Index (Sloc (E)) =
1670 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
1672 Set_Is_Atomic (Underlying_Type (Etype (E)));
1676 Set_Is_Volatile (E);
1677 Set_Treat_As_Volatile (E);
1681 ("inappropriate entity for pragma%", Arg1);
1683 end Process_Atomic_Shared_Volatile;
1685 ------------------------
1686 -- Process_Convention --
1687 ------------------------
1689 procedure Process_Convention
1690 (C : out Convention_Id;
1695 Comp_Unit : Unit_Number_Type;
1698 procedure Set_Convention_From_Pragma (E : Entity_Id);
1699 -- Set convention in entity E, and also flag that the entity has a
1700 -- convention pragma. If entity is for a private or incomplete type,
1701 -- also set convention and flag on underlying type. This procedure
1702 -- also deals with the special case of C_Pass_By_Copy convention.
1704 --------------------------------
1705 -- Set_Convention_From_Pragma --
1706 --------------------------------
1708 procedure Set_Convention_From_Pragma (E : Entity_Id) is
1710 Set_Convention (E, C);
1711 Set_Has_Convention_Pragma (E);
1713 if Is_Incomplete_Or_Private_Type (E) then
1714 Set_Convention (Underlying_Type (E), C);
1715 Set_Has_Convention_Pragma (Underlying_Type (E), True);
1718 -- A class-wide type should inherit the convention of
1719 -- the specific root type (although this isn't specified
1720 -- clearly by the RM).
1722 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
1723 Set_Convention (Class_Wide_Type (E), C);
1726 -- If the entity is a record type, then check for special case
1727 -- of C_Pass_By_Copy, which is treated the same as C except that
1728 -- the special record flag is set. This convention is also only
1729 -- permitted on record types (see AI95-00131).
1731 if Cname = Name_C_Pass_By_Copy then
1732 if Is_Record_Type (E) then
1733 Set_C_Pass_By_Copy (Base_Type (E));
1734 elsif Is_Incomplete_Or_Private_Type (E)
1735 and then Is_Record_Type (Underlying_Type (E))
1737 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
1740 ("C_Pass_By_Copy convention allowed only for record type",
1745 -- If the entity is a derived boolean type, check for the
1746 -- special case of convention C, C++, or Fortran, where we
1747 -- consider any nonzero value to represent true.
1749 if Is_Discrete_Type (E)
1750 and then Root_Type (Etype (E)) = Standard_Boolean
1756 C = Convention_Fortran)
1758 Set_Nonzero_Is_True (Base_Type (E));
1760 end Set_Convention_From_Pragma;
1762 -- Start of processing for Process_Convention
1765 Check_At_Least_N_Arguments (2);
1766 Check_Arg_Is_Identifier (Arg1);
1767 Check_Optional_Identifier (Arg1, Name_Convention);
1768 Cname := Chars (Expression (Arg1));
1770 -- C_Pass_By_Copy is treated as a synonym for convention C
1771 -- (this is tested again below to set the critical flag)
1773 if Cname = Name_C_Pass_By_Copy then
1776 -- Otherwise we must have something in the standard convention list
1778 elsif Is_Convention_Name (Cname) then
1779 C := Get_Convention_Id (Chars (Expression (Arg1)));
1781 -- In DEC VMS, it seems that there is an undocumented feature
1782 -- that any unrecognized convention is treated as the default,
1783 -- which for us is convention C. It does not seem so terrible
1784 -- to do this unconditionally, silently in the VMS case, and
1785 -- with a warning in the non-VMS case.
1788 if Warn_On_Export_Import and not OpenVMS_On_Target then
1790 ("?unrecognized convention name, C assumed",
1797 Check_Arg_Is_Local_Name (Arg2);
1798 Check_Optional_Identifier (Arg2, Name_Entity);
1800 Id := Expression (Arg2);
1803 if not Is_Entity_Name (Id) then
1804 Error_Pragma_Arg ("entity name required", Arg2);
1809 -- Go to renamed subprogram if present, since convention applies
1810 -- to the actual renamed entity, not to the renaming entity.
1812 if Is_Subprogram (E)
1813 and then Present (Alias (E))
1814 and then Nkind (Parent (Declaration_Node (E))) =
1815 N_Subprogram_Renaming_Declaration
1820 -- Check that we not applying this to a specless body
1822 if Is_Subprogram (E)
1823 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
1826 ("pragma% requires separate spec and must come before body");
1829 -- Check that we are not applying this to a named constant
1831 if Ekind (E) = E_Named_Integer
1833 Ekind (E) = E_Named_Real
1835 Error_Msg_Name_1 := Chars (N);
1837 ("cannot apply pragma% to named constant!",
1838 Get_Pragma_Arg (Arg2));
1840 ("\supply appropriate type for&!", Arg2);
1843 if Etype (E) = Any_Type
1844 or else Rep_Item_Too_Early (E, N)
1848 E := Underlying_Type (E);
1851 if Rep_Item_Too_Late (E, N) then
1855 if Has_Convention_Pragma (E) then
1857 ("at most one Convention/Export/Import pragma is allowed", Arg2);
1859 elsif Convention (E) = Convention_Protected
1860 or else Ekind (Scope (E)) = E_Protected_Type
1863 ("a protected operation cannot be given a different convention",
1867 -- For Intrinsic, a subprogram is required
1869 if C = Convention_Intrinsic
1870 and then not Is_Subprogram (E)
1871 and then not Is_Generic_Subprogram (E)
1874 ("second argument of pragma% must be a subprogram", Arg2);
1877 -- For Stdcall, a subprogram, variable or subprogram type is required
1879 if C = Convention_Stdcall
1880 and then not Is_Subprogram (E)
1881 and then not Is_Generic_Subprogram (E)
1882 and then Ekind (E) /= E_Variable
1885 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
1888 ("second argument of pragma% must be subprogram (type)",
1892 if not Is_Subprogram (E)
1893 and then not Is_Generic_Subprogram (E)
1895 Set_Convention_From_Pragma (E);
1899 Check_First_Subtype (Arg2);
1900 Set_Convention_From_Pragma (Base_Type (E));
1902 -- For subprograms, we must set the convention on the
1903 -- internally generated directly designated type as well.
1905 if Ekind (E) = E_Access_Subprogram_Type then
1906 Set_Convention_From_Pragma (Directly_Designated_Type (E));
1910 -- For the subprogram case, set proper convention for all homonyms
1911 -- in same compilation unit.
1912 -- Is the test of compilation unit really necessary ???
1913 -- What about subprogram renamings here???
1916 Comp_Unit := Get_Source_Unit (E);
1917 Set_Convention_From_Pragma (E);
1919 -- Treat a pragma Import as an implicit body, for GPS use.
1921 if Prag_Id = Pragma_Import then
1922 Generate_Reference (E, Id, 'b');
1928 exit when No (E1) or else Scope (E1) /= Current_Scope;
1930 -- Note: below we are missing a check for Rep_Item_Too_Late.
1931 -- That is deliberate, we cannot chain the rep item on more
1932 -- than one Rep_Item chain, to be fixed later ???
1934 if Comp_Unit = Get_Source_Unit (E1) then
1935 Set_Convention_From_Pragma (E1);
1937 if Prag_Id = Pragma_Import then
1938 Generate_Reference (E, Id, 'b');
1943 end Process_Convention;
1945 -----------------------------------------------------
1946 -- Process_Extended_Import_Export_Exception_Pragma --
1947 -----------------------------------------------------
1949 procedure Process_Extended_Import_Export_Exception_Pragma
1950 (Arg_Internal : Node_Id;
1951 Arg_External : Node_Id;
1961 if not OpenVMS_On_Target then
1963 ("?pragma% ignored (applies only to Open'V'M'S)");
1966 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
1967 Def_Id := Entity (Arg_Internal);
1969 if Ekind (Def_Id) /= E_Exception then
1971 ("pragma% must refer to declared exception", Arg_Internal);
1974 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
1976 if Present (Arg_Form) then
1977 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
1980 if Present (Arg_Form)
1981 and then Chars (Arg_Form) = Name_Ada
1985 Set_Is_VMS_Exception (Def_Id);
1986 Set_Exception_Code (Def_Id, No_Uint);
1989 if Present (Arg_Code) then
1990 if not Is_VMS_Exception (Def_Id) then
1992 ("Code option for pragma% not allowed for Ada case",
1996 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
1997 Code_Val := Expr_Value (Arg_Code);
1999 if not UI_Is_In_Int_Range (Code_Val) then
2001 ("Code option for pragma% must be in 32-bit range",
2005 Set_Exception_Code (Def_Id, Code_Val);
2008 end Process_Extended_Import_Export_Exception_Pragma;
2010 -------------------------------------------------
2011 -- Process_Extended_Import_Export_Internal_Arg --
2012 -------------------------------------------------
2014 procedure Process_Extended_Import_Export_Internal_Arg
2015 (Arg_Internal : Node_Id := Empty)
2020 if No (Arg_Internal) then
2021 Error_Pragma ("Internal parameter required for pragma%");
2024 if Nkind (Arg_Internal) = N_Identifier then
2027 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2028 and then (Prag_Id = Pragma_Import_Function
2030 Prag_Id = Pragma_Export_Function)
2036 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2039 Check_Arg_Is_Local_Name (Arg_Internal);
2040 end Process_Extended_Import_Export_Internal_Arg;
2042 --------------------------------------------------
2043 -- Process_Extended_Import_Export_Object_Pragma --
2044 --------------------------------------------------
2046 procedure Process_Extended_Import_Export_Object_Pragma
2047 (Arg_Internal : Node_Id;
2048 Arg_External : Node_Id;
2054 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2055 Def_Id := Entity (Arg_Internal);
2057 if Ekind (Def_Id) /= E_Constant
2058 and then Ekind (Def_Id) /= E_Variable
2061 ("pragma% must designate an object", Arg_Internal);
2064 if Is_Psected (Def_Id) then
2066 ("previous Psect_Object applies, pragma % not permitted",
2070 if Rep_Item_Too_Late (Def_Id, N) then
2074 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2076 if Present (Arg_Size)
2077 and then Nkind (Arg_Size) /= N_Identifier
2078 and then Nkind (Arg_Size) /= N_String_Literal
2081 ("pragma% Size argument must be identifier or string literal",
2085 -- Export_Object case
2087 if Prag_Id = Pragma_Export_Object then
2088 if not Is_Library_Level_Entity (Def_Id) then
2090 ("argument for pragma% must be library level entity",
2094 if Ekind (Current_Scope) = E_Generic_Package then
2095 Error_Pragma ("pragma& cannot appear in a generic unit");
2098 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2100 ("exported object must have compile time known size",
2104 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2106 ("?duplicate Export_Object pragma", N);
2108 Set_Exported (Def_Id, Arg_Internal);
2111 -- Import_Object case
2114 if Is_Concurrent_Type (Etype (Def_Id)) then
2116 ("cannot use pragma% for task/protected object",
2120 if Ekind (Def_Id) = E_Constant then
2122 ("cannot import a constant", Arg_Internal);
2125 if Warn_On_Export_Import
2126 and then Has_Discriminants (Etype (Def_Id))
2129 ("imported value must be initialized?", Arg_Internal);
2132 if Warn_On_Export_Import
2133 and then Is_Access_Type (Etype (Def_Id))
2136 ("cannot import object of an access type?", Arg_Internal);
2139 if Warn_On_Export_Import
2140 and then Is_Imported (Def_Id)
2143 ("?duplicate Import_Object pragma", N);
2145 -- Check for explicit initialization present. Note that an
2146 -- initialization that generated by the code generator, e.g.
2147 -- for an access type, does not count here.
2149 elsif Present (Expression (Parent (Def_Id)))
2152 (Original_Node (Expression (Parent (Def_Id))))
2154 Error_Msg_Sloc := Sloc (Def_Id);
2156 ("no initialization allowed for declaration of& #",
2157 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2160 Set_Imported (Def_Id);
2161 Note_Possible_Modification (Arg_Internal);
2164 end Process_Extended_Import_Export_Object_Pragma;
2166 ------------------------------------------------------
2167 -- Process_Extended_Import_Export_Subprogram_Pragma --
2168 ------------------------------------------------------
2170 procedure Process_Extended_Import_Export_Subprogram_Pragma
2171 (Arg_Internal : Node_Id;
2172 Arg_External : Node_Id;
2173 Arg_Parameter_Types : Node_Id;
2174 Arg_Result_Type : Node_Id := Empty;
2175 Arg_Mechanism : Node_Id;
2176 Arg_Result_Mechanism : Node_Id := Empty;
2177 Arg_First_Optional_Parameter : Node_Id := Empty)
2183 Ambiguous : Boolean;
2187 function Same_Base_Type
2189 Formal : Entity_Id) return Boolean;
2190 -- Determines if Ptype references the type of Formal. Note that
2191 -- only the base types need to match according to the spec. Ptype
2192 -- here is the argument from the pragma, which is either a type
2193 -- name, or an access attribute.
2195 --------------------
2196 -- Same_Base_Type --
2197 --------------------
2199 function Same_Base_Type
2201 Formal : Entity_Id) return Boolean
2203 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2207 -- Case where pragma argument is typ'Access
2209 if Nkind (Ptype) = N_Attribute_Reference
2210 and then Attribute_Name (Ptype) = Name_Access
2212 Pref := Prefix (Ptype);
2215 if not Is_Entity_Name (Pref)
2216 or else Entity (Pref) = Any_Type
2221 -- We have a match if the corresponding argument is of an
2222 -- anonymous access type, and its designicated type matches
2223 -- the type of the prefix of the access attribute
2225 return Ekind (Ftyp) = E_Anonymous_Access_Type
2226 and then Base_Type (Entity (Pref)) =
2227 Base_Type (Etype (Designated_Type (Ftyp)));
2229 -- Case where pragma argument is a type name
2234 if not Is_Entity_Name (Ptype)
2235 or else Entity (Ptype) = Any_Type
2240 -- We have a match if the corresponding argument is of
2241 -- the type given in the pragma (comparing base types)
2243 return Base_Type (Entity (Ptype)) = Ftyp;
2247 -- Start of processing for
2248 -- Process_Extended_Import_Export_Subprogram_Pragma
2251 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2252 Hom_Id := Entity (Arg_Internal);
2256 -- Loop through homonyms (overloadings) of Hom_Id
2258 while Present (Hom_Id) loop
2259 Def_Id := Get_Base_Subprogram (Hom_Id);
2261 -- We need a subprogram in the current scope
2263 if not Is_Subprogram (Def_Id)
2264 or else Scope (Def_Id) /= Current_Scope
2271 -- Pragma cannot apply to subprogram body
2273 if Is_Subprogram (Def_Id)
2276 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2279 ("pragma% requires separate spec"
2280 & " and must come before body");
2283 -- Test result type if given, note that the result type
2284 -- parameter can only be present for the function cases.
2286 if Present (Arg_Result_Type)
2287 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2291 elsif Etype (Def_Id) /= Standard_Void_Type
2293 (Chars (N) = Name_Export_Procedure
2294 or else Chars (N) = Name_Import_Procedure)
2298 -- Test parameter types if given. Note that this parameter
2299 -- has not been analyzed (and must not be, since it is
2300 -- semantic nonsense), so we get it as the parser left it.
2302 elsif Present (Arg_Parameter_Types) then
2303 Check_Matching_Types : declare
2308 Formal := First_Formal (Def_Id);
2310 if Nkind (Arg_Parameter_Types) = N_Null then
2311 if Present (Formal) then
2315 -- A list of one type, e.g. (List) is parsed as
2316 -- a parenthesized expression.
2318 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2319 and then Paren_Count (Arg_Parameter_Types) = 1
2322 or else Present (Next_Formal (Formal))
2327 Same_Base_Type (Arg_Parameter_Types, Formal);
2330 -- A list of more than one type is parsed as a aggregate
2332 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2333 and then Paren_Count (Arg_Parameter_Types) = 0
2335 Ptype := First (Expressions (Arg_Parameter_Types));
2337 while Present (Ptype) or else Present (Formal) loop
2340 or else not Same_Base_Type (Ptype, Formal)
2345 Next_Formal (Formal);
2350 -- Anything else is of the wrong form
2354 ("wrong form for Parameter_Types parameter",
2355 Arg_Parameter_Types);
2357 end Check_Matching_Types;
2360 -- Match is now False if the entry we found did not match
2361 -- either a supplied Parameter_Types or Result_Types argument
2367 -- Ambiguous case, the flag Ambiguous shows if we already
2368 -- detected this and output the initial messages.
2371 if not Ambiguous then
2373 Error_Msg_Name_1 := Chars (N);
2375 ("pragma% does not uniquely identify subprogram!",
2377 Error_Msg_Sloc := Sloc (Ent);
2378 Error_Msg_N ("matching subprogram #!", N);
2382 Error_Msg_Sloc := Sloc (Def_Id);
2383 Error_Msg_N ("matching subprogram #!", N);
2388 Hom_Id := Homonym (Hom_Id);
2391 -- See if we found an entry
2394 if not Ambiguous then
2395 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
2397 ("pragma% cannot be given for generic subprogram");
2401 ("pragma% does not identify local subprogram");
2408 -- Import pragmas must be be for imported entities
2410 if Prag_Id = Pragma_Import_Function
2412 Prag_Id = Pragma_Import_Procedure
2414 Prag_Id = Pragma_Import_Valued_Procedure
2416 if not Is_Imported (Ent) then
2418 ("pragma Import or Interface must precede pragma%");
2421 -- Here we have the Export case which can set the entity as exported
2423 -- But does not do so if the specified external name is null,
2424 -- since that is taken as a signal in DEC Ada 83 (with which
2425 -- we want to be compatible) to request no external name.
2427 elsif Nkind (Arg_External) = N_String_Literal
2428 and then String_Length (Strval (Arg_External)) = 0
2432 -- In all other cases, set entit as exported
2435 Set_Exported (Ent, Arg_Internal);
2438 -- Special processing for Valued_Procedure cases
2440 if Prag_Id = Pragma_Import_Valued_Procedure
2442 Prag_Id = Pragma_Export_Valued_Procedure
2444 Formal := First_Formal (Ent);
2448 ("at least one parameter required for pragma%");
2450 elsif Ekind (Formal) /= E_Out_Parameter then
2452 ("first parameter must have mode out for pragma%");
2455 Set_Is_Valued_Procedure (Ent);
2459 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
2461 -- Process Result_Mechanism argument if present. We have already
2462 -- checked that this is only allowed for the function case.
2464 if Present (Arg_Result_Mechanism) then
2465 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
2468 -- Process Mechanism parameter if present. Note that this parameter
2469 -- is not analyzed, and must not be analyzed since it is semantic
2470 -- nonsense, so we get it in exactly as the parser left it.
2472 if Present (Arg_Mechanism) then
2480 -- A single mechanism association without a formal parameter
2481 -- name is parsed as a parenthesized expression. All other
2482 -- cases are parsed as aggregates, so we rewrite the single
2483 -- parameter case as an aggregate for consistency.
2485 if Nkind (Arg_Mechanism) /= N_Aggregate
2486 and then Paren_Count (Arg_Mechanism) = 1
2488 Rewrite (Arg_Mechanism,
2489 Make_Aggregate (Sloc (Arg_Mechanism),
2490 Expressions => New_List (
2491 Relocate_Node (Arg_Mechanism))));
2494 -- Case of only mechanism name given, applies to all formals
2496 if Nkind (Arg_Mechanism) /= N_Aggregate then
2497 Formal := First_Formal (Ent);
2498 while Present (Formal) loop
2499 Set_Mechanism_Value (Formal, Arg_Mechanism);
2500 Next_Formal (Formal);
2503 -- Case of list of mechanism associations given
2506 if Null_Record_Present (Arg_Mechanism) then
2508 ("inappropriate form for Mechanism parameter",
2512 -- Deal with positional ones first
2514 Formal := First_Formal (Ent);
2515 if Present (Expressions (Arg_Mechanism)) then
2516 Mname := First (Expressions (Arg_Mechanism));
2518 while Present (Mname) loop
2521 ("too many mechanism associations", Mname);
2524 Set_Mechanism_Value (Formal, Mname);
2525 Next_Formal (Formal);
2530 -- Deal with named entries
2532 if Present (Component_Associations (Arg_Mechanism)) then
2533 Massoc := First (Component_Associations (Arg_Mechanism));
2535 while Present (Massoc) loop
2536 Choice := First (Choices (Massoc));
2538 if Nkind (Choice) /= N_Identifier
2539 or else Present (Next (Choice))
2542 ("incorrect form for mechanism association",
2546 Formal := First_Formal (Ent);
2550 ("parameter name & not present", Choice);
2553 if Chars (Choice) = Chars (Formal) then
2555 (Formal, Expression (Massoc));
2559 Next_Formal (Formal);
2569 -- Process First_Optional_Parameter argument if present. We have
2570 -- already checked that this is only allowed for the Import case.
2572 if Present (Arg_First_Optional_Parameter) then
2573 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
2575 ("first optional parameter must be formal parameter name",
2576 Arg_First_Optional_Parameter);
2579 Formal := First_Formal (Ent);
2583 ("specified formal parameter& not found",
2584 Arg_First_Optional_Parameter);
2587 exit when Chars (Formal) =
2588 Chars (Arg_First_Optional_Parameter);
2590 Next_Formal (Formal);
2593 Set_First_Optional_Parameter (Ent, Formal);
2595 -- Check specified and all remaining formals have right form
2597 while Present (Formal) loop
2598 if Ekind (Formal) /= E_In_Parameter then
2600 ("optional formal& is not of mode in!",
2601 Arg_First_Optional_Parameter, Formal);
2604 Dval := Default_Value (Formal);
2606 if not Present (Dval) then
2608 ("optional formal& does not have default value!",
2609 Arg_First_Optional_Parameter, Formal);
2611 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
2616 ("default value for optional formal& is non-static!",
2617 Arg_First_Optional_Parameter, Formal);
2621 Set_Is_Optional_Parameter (Formal);
2622 Next_Formal (Formal);
2625 end Process_Extended_Import_Export_Subprogram_Pragma;
2627 --------------------------
2628 -- Process_Generic_List --
2629 --------------------------
2631 procedure Process_Generic_List is
2637 Check_No_Identifiers;
2638 Check_At_Least_N_Arguments (1);
2641 while Present (Arg) loop
2642 Exp := Expression (Arg);
2645 if not Is_Entity_Name (Exp)
2647 (not Is_Generic_Instance (Entity (Exp))
2649 not Is_Generic_Unit (Entity (Exp)))
2652 ("pragma% argument must be name of generic unit/instance",
2658 end Process_Generic_List;
2660 ---------------------------------
2661 -- Process_Import_Or_Interface --
2662 ---------------------------------
2664 procedure Process_Import_Or_Interface is
2670 Process_Convention (C, Def_Id);
2671 Kill_Size_Check_Code (Def_Id);
2672 Note_Possible_Modification (Expression (Arg2));
2674 if Ekind (Def_Id) = E_Variable
2676 Ekind (Def_Id) = E_Constant
2678 -- User initialization is not allowed for imported object, but
2679 -- the object declaration may contain a default initialization,
2680 -- that will be discarded. Note that an explicit initialization
2681 -- only counts if it comes from source, otherwise it is simply
2682 -- the code generator making an implicit initialization explicit.
2684 if Present (Expression (Parent (Def_Id)))
2685 and then Comes_From_Source (Expression (Parent (Def_Id)))
2687 Error_Msg_Sloc := Sloc (Def_Id);
2689 ("no initialization allowed for declaration of& #",
2690 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2694 Set_Imported (Def_Id);
2695 Set_Is_Public (Def_Id);
2696 Process_Interface_Name (Def_Id, Arg3, Arg4);
2698 -- It is not possible to import a constant of an unconstrained
2699 -- array type (e.g. string) because there is no simple way to
2700 -- write a meaningful subtype for it.
2702 if Is_Array_Type (Etype (Def_Id))
2703 and then not Is_Constrained (Etype (Def_Id))
2706 ("imported constant& must have a constrained subtype",
2711 elsif Is_Subprogram (Def_Id)
2712 or else Is_Generic_Subprogram (Def_Id)
2714 -- If the name is overloaded, pragma applies to all of the
2715 -- denoted entities in the same declarative part.
2719 while Present (Hom_Id) loop
2720 Def_Id := Get_Base_Subprogram (Hom_Id);
2722 -- Ignore inherited subprograms because the pragma will
2723 -- apply to the parent operation, which is the one called.
2725 if Is_Overloadable (Def_Id)
2726 and then Present (Alias (Def_Id))
2730 -- If it is not a subprogram, it must be in an outer
2731 -- scope and pragma does not apply.
2733 elsif not Is_Subprogram (Def_Id)
2734 and then not Is_Generic_Subprogram (Def_Id)
2738 -- Verify that the homonym is in the same declarative
2739 -- part (not just the same scope).
2741 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
2742 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
2747 Set_Imported (Def_Id);
2749 -- If Import intrinsic, set intrinsic flag
2750 -- and verify that it is known as such.
2752 if C = Convention_Intrinsic then
2753 Set_Is_Intrinsic_Subprogram (Def_Id);
2754 Check_Intrinsic_Subprogram
2755 (Def_Id, Expression (Arg2));
2758 -- All interfaced procedures need an external
2759 -- symbol created for them since they are
2760 -- always referenced from another object file.
2762 Set_Is_Public (Def_Id);
2764 -- Verify that the subprogram does not have a completion
2765 -- through a renaming declaration. For other completions
2766 -- the pragma appears as a too late representation.
2769 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
2773 and then Nkind (Decl) = N_Subprogram_Declaration
2774 and then Present (Corresponding_Body (Decl))
2777 (Unit_Declaration_Node
2778 (Corresponding_Body (Decl))) =
2779 N_Subprogram_Renaming_Declaration
2781 Error_Msg_Sloc := Sloc (Def_Id);
2782 Error_Msg_NE ("cannot import&#," &
2783 " already completed by a renaming",
2788 Set_Has_Completion (Def_Id);
2789 Process_Interface_Name (Def_Id, Arg3, Arg4);
2792 if Is_Compilation_Unit (Hom_Id) then
2794 -- Its possible homonyms are not affected by the pragma.
2795 -- Such homonyms might be present in the context of other
2796 -- units being compiled.
2801 Hom_Id := Homonym (Hom_Id);
2805 -- When the convention is Java, we also allow Import to be given
2806 -- for packages, exceptions, and record components.
2808 elsif C = Convention_Java
2810 (Ekind (Def_Id) = E_Package
2811 or else Ekind (Def_Id) = E_Exception
2812 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
2814 Set_Imported (Def_Id);
2815 Set_Is_Public (Def_Id);
2816 Process_Interface_Name (Def_Id, Arg3, Arg4);
2820 ("second argument of pragma% must be object or subprogram",
2824 -- If this pragma applies to a compilation unit, then the unit,
2825 -- which is a subprogram, does not require (or allow) a body.
2826 -- We also do not need to elaborate imported procedures.
2828 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
2830 Cunit : constant Node_Id := Parent (Parent (N));
2832 Set_Body_Required (Cunit, False);
2835 end Process_Import_Or_Interface;
2837 --------------------
2838 -- Process_Inline --
2839 --------------------
2841 procedure Process_Inline (Active : Boolean) is
2847 Effective : Boolean := False;
2849 procedure Make_Inline (Subp : Entity_Id);
2850 -- Subp is the defining unit name of the subprogram
2851 -- declaration. Set the flag, as well as the flag in the
2852 -- corresponding body, if there is one present.
2854 procedure Set_Inline_Flags (Subp : Entity_Id);
2855 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp
2857 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean;
2858 -- Do not set the inline flag if body is available and contains
2859 -- exception handlers, to prevent undefined symbols at link time.
2861 ----------------------------
2862 -- Back_End_Cannot_Inline --
2863 ----------------------------
2865 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean is
2866 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
2869 if Nkind (Decl) = N_Subprogram_Body then
2872 (Exception_Handlers (Handled_Statement_Sequence (Decl)));
2874 elsif Nkind (Decl) = N_Subprogram_Declaration
2875 and then Present (Corresponding_Body (Decl))
2877 -- If the subprogram is a renaming as body, the body is
2878 -- just a call to the renamed subprogram, and inlining is
2879 -- trivially possible.
2881 if Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
2882 N_Subprogram_Renaming_Declaration
2888 Present (Exception_Handlers
2889 (Handled_Statement_Sequence
2890 (Unit_Declaration_Node (Corresponding_Body (Decl)))));
2893 -- If body is not available, assume the best, the check is
2894 -- performed again when compiling enclosing package bodies.
2898 end Back_End_Cannot_Inline;
2904 procedure Make_Inline (Subp : Entity_Id) is
2905 Kind : constant Entity_Kind := Ekind (Subp);
2906 Inner_Subp : Entity_Id := Subp;
2909 if Etype (Subp) = Any_Type then
2912 elsif Back_End_Cannot_Inline (Subp) then
2913 Applies := True; -- Do not treat as an error.
2916 -- Here we have a candidate for inlining, but we must exclude
2917 -- derived operations. Otherwise we will end up trying to
2918 -- inline a phantom declaration, and the result would be to
2919 -- drag in a body which has no direct inlining associated with
2920 -- it. That would not only be inefficient but would also result
2921 -- in the backend doing cross-unit inlining in cases where it
2922 -- was definitely inappropriate to do so.
2924 -- However, a simple Comes_From_Source test is insufficient,
2925 -- since we do want to allow inlining of generic instances,
2926 -- which also do not come from source. Predefined operators do
2927 -- not come from source but are not inlineable either.
2929 elsif not Comes_From_Source (Subp)
2930 and then not Is_Generic_Instance (Subp)
2931 and then Scope (Subp) /= Standard_Standard
2936 -- The referenced entity must either be the enclosing entity,
2937 -- or an entity declared within the current open scope.
2939 elsif Present (Scope (Subp))
2940 and then Scope (Subp) /= Current_Scope
2941 and then Subp /= Current_Scope
2944 ("argument of% must be entity in current scope", Assoc);
2948 -- Processing for procedure, operator or function.
2949 -- If subprogram is aliased (as for an instance) indicate
2950 -- that the renamed entity is inlined.
2952 if Is_Subprogram (Subp) then
2953 while Present (Alias (Inner_Subp)) loop
2954 Inner_Subp := Alias (Inner_Subp);
2957 Set_Inline_Flags (Inner_Subp);
2959 Decl := Parent (Parent (Inner_Subp));
2961 if Nkind (Decl) = N_Subprogram_Declaration
2962 and then Present (Corresponding_Body (Decl))
2964 Set_Inline_Flags (Corresponding_Body (Decl));
2969 -- For a generic subprogram set flag as well, for use at
2970 -- the point of instantiation, to determine whether the
2971 -- body should be generated.
2973 elsif Is_Generic_Subprogram (Subp) then
2974 Set_Inline_Flags (Subp);
2977 -- Literals are by definition inlined
2979 elsif Kind = E_Enumeration_Literal then
2982 -- Anything else is an error
2986 ("expect subprogram name for pragma%", Assoc);
2990 ----------------------
2991 -- Set_Inline_Flags --
2992 ----------------------
2994 procedure Set_Inline_Flags (Subp : Entity_Id) is
2997 Set_Is_Inlined (Subp, True);
3000 if not Has_Pragma_Inline (Subp) then
3001 Set_Has_Pragma_Inline (Subp);
3002 Set_Next_Rep_Item (N, First_Rep_Item (Subp));
3003 Set_First_Rep_Item (Subp, N);
3006 end Set_Inline_Flags;
3008 -- Start of processing for Process_Inline
3011 Check_No_Identifiers;
3012 Check_At_Least_N_Arguments (1);
3015 Inline_Processing_Required := True;
3019 while Present (Assoc) loop
3020 Subp_Id := Expression (Assoc);
3024 if Is_Entity_Name (Subp_Id) then
3025 Subp := Entity (Subp_Id);
3027 if Subp = Any_Id then
3033 while Present (Homonym (Subp))
3034 and then Scope (Homonym (Subp)) = Current_Scope
3036 Make_Inline (Homonym (Subp));
3037 Subp := Homonym (Subp);
3044 ("inappropriate argument for pragma%", Assoc);
3047 and then Warn_On_Redundant_Constructs
3049 Error_Msg_NE ("pragma inline on& is redundant?",
3050 N, Entity (Subp_Id));
3057 ----------------------------
3058 -- Process_Interface_Name --
3059 ----------------------------
3061 procedure Process_Interface_Name
3062 (Subprogram_Def : Entity_Id;
3068 String_Val : String_Id;
3070 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3071 -- SN is a string literal node for an interface name. This routine
3072 -- performs some minimal checks that the name is reasonable. In
3073 -- particular that no spaces or other obviously incorrect characters
3074 -- appear. This is only a warning, since any characters are allowed.
3076 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3077 S : constant String_Id := Strval (Expr_Value_S (SN));
3078 SL : constant Nat := String_Length (S);
3083 Error_Msg_N ("interface name cannot be null string", SN);
3086 for J in 1 .. SL loop
3087 C := Get_String_Char (S, J);
3089 if Warn_On_Export_Import
3090 and then (not In_Character_Range (C)
3091 or else Get_Character (C) = ' '
3092 or else Get_Character (C) = ',')
3095 ("?interface name contains illegal character", SN);
3098 end Check_Form_Of_Interface_Name;
3100 -- Start of processing for Process_Interface_Name
3103 if No (Link_Arg) then
3104 if No (Ext_Arg) then
3107 elsif Chars (Ext_Arg) = Name_Link_Name then
3109 Link_Nam := Expression (Ext_Arg);
3112 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3113 Ext_Nam := Expression (Ext_Arg);
3118 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3119 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3120 Ext_Nam := Expression (Ext_Arg);
3121 Link_Nam := Expression (Link_Arg);
3124 -- Check expressions for external name and link name are static
3126 if Present (Ext_Nam) then
3127 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3128 Check_Form_Of_Interface_Name (Ext_Nam);
3130 -- Verify that the external name is not the name of a local
3131 -- entity, which would hide the imported one and lead to
3132 -- run-time surprises. The problem can only arise for entities
3133 -- declared in a package body (otherwise the external name is
3134 -- fully qualified and won't conflict).
3142 if Prag_Id = Pragma_Import then
3143 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3145 E := Entity_Id (Get_Name_Table_Info (Nam));
3147 if Nam /= Chars (Subprogram_Def)
3148 and then Present (E)
3149 and then not Is_Overloadable (E)
3150 and then Is_Immediately_Visible (E)
3151 and then not Is_Imported (E)
3152 and then Ekind (Scope (E)) = E_Package
3156 while Present (Par) loop
3157 if Nkind (Par) = N_Package_Body then
3158 Error_Msg_Sloc := Sloc (E);
3160 ("imported entity is hidden by & declared#",
3165 Par := Parent (Par);
3172 if Present (Link_Nam) then
3173 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3174 Check_Form_Of_Interface_Name (Link_Nam);
3177 -- If there is no link name, just set the external name
3179 if No (Link_Nam) then
3180 Set_Encoded_Interface_Name
3181 (Get_Base_Subprogram (Subprogram_Def),
3182 Adjust_External_Name_Case (Expr_Value_S (Ext_Nam)));
3184 -- For the Link_Name case, the given literal is preceded by an
3185 -- asterisk, which indicates to GCC that the given name should
3186 -- be taken literally, and in particular that no prepending of
3187 -- underlines should occur, even in systems where this is the
3192 Store_String_Char (Get_Char_Code ('*'));
3193 String_Val := Strval (Expr_Value_S (Link_Nam));
3195 for J in 1 .. String_Length (String_Val) loop
3196 Store_String_Char (Get_String_Char (String_Val, J));
3200 Make_String_Literal (Sloc (Link_Nam), End_String);
3202 Set_Encoded_Interface_Name
3203 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3205 end Process_Interface_Name;
3207 -----------------------------------------
3208 -- Process_Interrupt_Or_Attach_Handler --
3209 -----------------------------------------
3211 procedure Process_Interrupt_Or_Attach_Handler is
3212 Arg1_X : constant Node_Id := Expression (Arg1);
3213 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3214 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3217 Set_Is_Interrupt_Handler (Handler_Proc);
3219 -- If the pragma is not associated with a handler procedure
3220 -- within a protected type, then it must be for a nonprotected
3221 -- procedure for the AAMP target, in which case we don't
3222 -- associate a representation item with the procedure's scope.
3224 if Ekind (Proc_Scope) = E_Protected_Type then
3225 if Prag_Id = Pragma_Interrupt_Handler
3227 Prag_Id = Pragma_Attach_Handler
3229 Record_Rep_Item (Proc_Scope, N);
3232 end Process_Interrupt_Or_Attach_Handler;
3234 --------------------------------------------------
3235 -- Process_Restrictions_Or_Restriction_Warnings --
3236 --------------------------------------------------
3238 procedure Process_Restrictions_Or_Restriction_Warnings is
3240 R_Id : Restriction_Id;
3245 procedure Set_Warning (R : All_Restrictions);
3246 -- If this is a Restriction_Warnings pragma, set warning flag
3248 procedure Set_Warning (R : All_Restrictions) is
3250 if Prag_Id = Pragma_Restriction_Warnings then
3251 Restriction_Warnings (R) := True;
3255 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
3258 Check_Ada_83_Warning;
3259 Check_At_Least_N_Arguments (1);
3260 Check_Valid_Configuration_Pragma;
3263 while Present (Arg) loop
3265 Expr := Expression (Arg);
3267 -- Case of no restriction identifier
3269 if Id = No_Name then
3270 if Nkind (Expr) /= N_Identifier then
3272 ("invalid form for restriction", Arg);
3275 -- No_Requeue is a synonym for No_Requeue_Statements
3277 if Chars (Expr) = Name_No_Requeue then
3279 (No_Implementation_Restrictions, Arg);
3280 Set_Restriction (No_Requeue_Statements, N);
3281 Set_Warning (No_Requeue_Statements);
3283 -- No_Task_Attributes is a synonym for
3284 -- No_Task_Attributes_Package
3286 elsif Chars (Expr) = Name_No_Task_Attributes then
3288 (No_Implementation_Restrictions, Arg);
3289 Set_Restriction (No_Task_Attributes_Package, N);
3290 Set_Warning (No_Task_Attributes_Package);
3292 -- Normal processing for all other cases
3295 R_Id := Get_Restriction_Id (Chars (Expr));
3297 if R_Id not in All_Boolean_Restrictions then
3299 ("invalid restriction identifier", Arg);
3301 -- Restriction is active
3304 if Implementation_Restriction (R_Id) then
3306 (No_Implementation_Restrictions, Arg);
3309 Set_Restriction (R_Id, N);
3312 -- A very special case that must be processed here:
3313 -- pragma Restrictions (No_Exceptions) turns off
3314 -- all run-time checking. This is a bit dubious in
3315 -- terms of the formal language definition, but it
3316 -- is what is intended by RM H.4(12).
3318 if R_Id = No_Exceptions then
3319 Scope_Suppress := (others => True);
3325 -- Case of restriction identifier present
3328 R_Id := Get_Restriction_Id (Id);
3329 Analyze_And_Resolve (Expr, Any_Integer);
3331 if R_Id not in All_Parameter_Restrictions then
3333 ("invalid restriction parameter identifier", Arg);
3335 elsif not Is_OK_Static_Expression (Expr) then
3336 Flag_Non_Static_Expr
3337 ("value must be static expression!", Expr);
3340 elsif not Is_Integer_Type (Etype (Expr))
3341 or else Expr_Value (Expr) < 0
3344 ("value must be non-negative integer", Arg);
3346 -- Restriction pragma is active
3349 Val := Expr_Value (Expr);
3351 if not UI_Is_In_Int_Range (Val) then
3353 ("pragma ignored, value too large?", Arg);
3355 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
3363 end Process_Restrictions_Or_Restriction_Warnings;
3365 ---------------------------------
3366 -- Process_Suppress_Unsuppress --
3367 ---------------------------------
3369 -- Note: this procedure makes entries in the check suppress data
3370 -- structures managed by Sem. See spec of package Sem for full
3371 -- details on how we handle recording of check suppression.
3373 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
3378 In_Package_Spec : constant Boolean :=
3379 (Ekind (Current_Scope) = E_Package
3381 Ekind (Current_Scope) = E_Generic_Package)
3382 and then not In_Package_Body (Current_Scope);
3384 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
3385 -- Used to suppress a single check on the given entity
3387 --------------------------------
3388 -- Suppress_Unsuppress_Echeck --
3389 --------------------------------
3391 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
3392 ESR : constant Entity_Check_Suppress_Record :=
3395 Suppress => Suppress_Case);
3398 Set_Checks_May_Be_Suppressed (E);
3400 if In_Package_Spec then
3401 Global_Entity_Suppress.Append (ESR);
3403 Local_Entity_Suppress.Append (ESR);
3406 -- If this is a first subtype, and the base type is distinct,
3407 -- then also set the suppress flags on the base type.
3409 if Is_First_Subtype (E)
3410 and then Etype (E) /= E
3412 Suppress_Unsuppress_Echeck (Etype (E), C);
3414 end Suppress_Unsuppress_Echeck;
3416 -- Start of processing for Process_Suppress_Unsuppress
3419 -- Suppress/Unsuppress can appear as a configuration pragma,
3420 -- or in a declarative part or a package spec (RM 11.5(5))
3422 if not Is_Configuration_Pragma then
3423 Check_Is_In_Decl_Part_Or_Package_Spec;
3426 Check_At_Least_N_Arguments (1);
3427 Check_At_Most_N_Arguments (2);
3428 Check_No_Identifier (Arg1);
3429 Check_Arg_Is_Identifier (Arg1);
3431 if not Is_Check_Name (Chars (Expression (Arg1))) then
3433 ("argument of pragma% is not valid check name", Arg1);
3436 C := Get_Check_Id (Chars (Expression (Arg1)));
3439 if Arg_Count = 1 then
3441 -- Make an entry in the local scope suppress table. This is the
3442 -- table that directly shows the current value of the scope
3443 -- suppress check for any check id value.
3445 if C = All_Checks then
3446 Scope_Suppress := (others => Suppress_Case);
3448 Scope_Suppress (C) := Suppress_Case;
3451 -- Also make an entry in the Local_Entity_Suppress table. See
3452 -- extended description in the package spec of Sem for details.
3454 Local_Entity_Suppress.Append
3457 Suppress => Suppress_Case));
3459 -- Case of two arguments present, where the check is
3460 -- suppressed for a specified entity (given as the second
3461 -- argument of the pragma)
3464 Check_Optional_Identifier (Arg2, Name_On);
3465 E_Id := Expression (Arg2);
3468 if not Is_Entity_Name (E_Id) then
3470 ("second argument of pragma% must be entity name", Arg2);
3479 -- Enforce RM 11.5(7) which requires that for a pragma that
3480 -- appears within a package spec, the named entity must be
3481 -- within the package spec. We allow the package name itself
3482 -- to be mentioned since that makes sense, although it is not
3483 -- strictly allowed by 11.5(7).
3486 and then E /= Current_Scope
3487 and then Scope (E) /= Current_Scope
3490 ("entity in pragma% is not in package spec ('R'M 11.5(7))",
3494 -- Loop through homonyms. As noted below, in the case of a package
3495 -- spec, only homonyms within the package spec are considered.
3498 Suppress_Unsuppress_Echeck (E, C);
3500 if Is_Generic_Instance (E)
3501 and then Is_Subprogram (E)
3502 and then Present (Alias (E))
3504 Suppress_Unsuppress_Echeck (Alias (E), C);
3507 -- Move to next homonym
3512 -- If we are within a package specification, the
3513 -- pragma only applies to homonyms in the same scope.
3515 exit when In_Package_Spec
3516 and then Scope (E) /= Current_Scope;
3519 end Process_Suppress_Unsuppress;
3525 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
3527 if Is_Imported (E) then
3529 ("cannot export entity& that was previously imported", Arg);
3531 elsif Present (Address_Clause (E)) then
3533 ("cannot export entity& that has an address clause", Arg);
3536 Set_Is_Exported (E);
3538 -- Generate a reference for entity explicitly, because the
3539 -- identifier may be overloaded and name resolution will not
3542 Generate_Reference (E, Arg);
3544 -- Deal with exporting non-library level entity
3546 if not Is_Library_Level_Entity (E) then
3548 -- Not allowed at all for subprograms
3550 if Is_Subprogram (E) then
3551 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
3553 -- Otherwise set public and statically allocated
3557 Set_Is_Statically_Allocated (E);
3559 if Warn_On_Export_Import then
3561 ("?& has been made static as a result of Export", Arg, E);
3563 ("\this usage is non-standard and non-portable", Arg);
3568 if Warn_On_Export_Import and then Is_Type (E) then
3570 ("exporting a type has no effect?", Arg, E);
3573 if Warn_On_Export_Import and Inside_A_Generic then
3575 ("all instances of& will have the same external name?", Arg, E);
3579 ----------------------------------------------
3580 -- Set_Extended_Import_Export_External_Name --
3581 ----------------------------------------------
3583 procedure Set_Extended_Import_Export_External_Name
3584 (Internal_Ent : Entity_Id;
3585 Arg_External : Node_Id)
3587 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
3591 if No (Arg_External) then
3594 elsif Nkind (Arg_External) = N_String_Literal then
3595 if String_Length (Strval (Arg_External)) = 0 then
3598 New_Name := Adjust_External_Name_Case (Arg_External);
3601 elsif Nkind (Arg_External) = N_Identifier then
3602 New_Name := Get_Default_External_Name (Arg_External);
3606 ("incorrect form for External parameter for pragma%",
3610 -- If we already have an external name set (by a prior normal
3611 -- Import or Export pragma), then the external names must match
3613 if Present (Interface_Name (Internal_Ent)) then
3615 S1 : constant String_Id := Strval (Old_Name);
3616 S2 : constant String_Id := Strval (New_Name);
3619 -- Called if names do not match
3621 procedure Mismatch is
3623 Error_Msg_Sloc := Sloc (Old_Name);
3625 ("external name does not match that given #",
3630 if String_Length (S1) /= String_Length (S2) then
3634 for J in 1 .. String_Length (S1) loop
3635 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
3642 -- Otherwise set the given name
3645 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
3648 end Set_Extended_Import_Export_External_Name;
3654 procedure Set_Imported (E : Entity_Id) is
3656 Error_Msg_Sloc := Sloc (E);
3658 if Is_Exported (E) or else Is_Imported (E) then
3659 Error_Msg_NE ("import of& declared# not allowed", N, E);
3661 if Is_Exported (E) then
3662 Error_Msg_N ("\entity was previously exported", N);
3664 Error_Msg_N ("\entity was previously imported", N);
3667 Error_Pragma ("\(pragma% applies to all previous entities)");
3670 Set_Is_Imported (E);
3672 -- If the entity is an object that is not at the library
3673 -- level, then it is statically allocated. We do not worry
3674 -- about objects with address clauses in this context since
3675 -- they are not really imported in the linker sense.
3678 and then not Is_Library_Level_Entity (E)
3679 and then No (Address_Clause (E))
3681 Set_Is_Statically_Allocated (E);
3686 -------------------------
3687 -- Set_Mechanism_Value --
3688 -------------------------
3690 -- Note: the mechanism name has not been analyzed (and cannot indeed
3691 -- be analyzed, since it is semantic nonsense), so we get it in the
3692 -- exact form created by the parser.
3694 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
3698 procedure Bad_Class;
3699 -- Signal bad descriptor class name
3701 procedure Bad_Mechanism;
3702 -- Signal bad mechanism name
3704 procedure Bad_Class is
3706 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
3709 procedure Bad_Mechanism is
3711 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
3714 -- Start of processing for Set_Mechanism_Value
3717 if Mechanism (Ent) /= Default_Mechanism then
3719 ("mechanism for & has already been set", Mech_Name, Ent);
3722 -- MECHANISM_NAME ::= value | reference | descriptor
3724 if Nkind (Mech_Name) = N_Identifier then
3725 if Chars (Mech_Name) = Name_Value then
3726 Set_Mechanism (Ent, By_Copy);
3729 elsif Chars (Mech_Name) = Name_Reference then
3730 Set_Mechanism (Ent, By_Reference);
3733 elsif Chars (Mech_Name) = Name_Descriptor then
3734 Check_VMS (Mech_Name);
3735 Set_Mechanism (Ent, By_Descriptor);
3738 elsif Chars (Mech_Name) = Name_Copy then
3740 ("bad mechanism name, Value assumed", Mech_Name);
3746 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
3747 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3749 -- Note: this form is parsed as an indexed component
3751 elsif Nkind (Mech_Name) = N_Indexed_Component then
3752 Class := First (Expressions (Mech_Name));
3754 if Nkind (Prefix (Mech_Name)) /= N_Identifier
3755 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
3756 or else Present (Next (Class))
3761 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
3762 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
3764 -- Note: this form is parsed as a function call
3766 elsif Nkind (Mech_Name) = N_Function_Call then
3768 Param := First (Parameter_Associations (Mech_Name));
3770 if Nkind (Name (Mech_Name)) /= N_Identifier
3771 or else Chars (Name (Mech_Name)) /= Name_Descriptor
3772 or else Present (Next (Param))
3773 or else No (Selector_Name (Param))
3774 or else Chars (Selector_Name (Param)) /= Name_Class
3778 Class := Explicit_Actual_Parameter (Param);
3785 -- Fall through here with Class set to descriptor class name
3787 Check_VMS (Mech_Name);
3789 if Nkind (Class) /= N_Identifier then
3792 elsif Chars (Class) = Name_UBS then
3793 Set_Mechanism (Ent, By_Descriptor_UBS);
3795 elsif Chars (Class) = Name_UBSB then
3796 Set_Mechanism (Ent, By_Descriptor_UBSB);
3798 elsif Chars (Class) = Name_UBA then
3799 Set_Mechanism (Ent, By_Descriptor_UBA);
3801 elsif Chars (Class) = Name_S then
3802 Set_Mechanism (Ent, By_Descriptor_S);
3804 elsif Chars (Class) = Name_SB then
3805 Set_Mechanism (Ent, By_Descriptor_SB);
3807 elsif Chars (Class) = Name_A then
3808 Set_Mechanism (Ent, By_Descriptor_A);
3810 elsif Chars (Class) = Name_NCA then
3811 Set_Mechanism (Ent, By_Descriptor_NCA);
3817 end Set_Mechanism_Value;
3819 -- Start of processing for Analyze_Pragma
3822 if not Is_Pragma_Name (Chars (N)) then
3823 if Warn_On_Unrecognized_Pragma then
3824 Error_Pragma ("unrecognized pragma%!?");
3829 Prag_Id := Get_Pragma_Id (Chars (N));
3839 if Present (Pragma_Argument_Associations (N)) then
3840 Arg1 := First (Pragma_Argument_Associations (N));
3842 if Present (Arg1) then
3843 Arg2 := Next (Arg1);
3845 if Present (Arg2) then
3846 Arg3 := Next (Arg2);
3848 if Present (Arg3) then
3849 Arg4 := Next (Arg3);
3855 -- Count number of arguments
3862 while Present (Arg_Node) loop
3863 Arg_Count := Arg_Count + 1;
3868 -- An enumeration type defines the pragmas that are supported by the
3869 -- implementation. Get_Pragma_Id (in package Prag) transorms a name
3870 -- into the corresponding enumeration value for the following case.
3878 -- pragma Abort_Defer;
3880 when Pragma_Abort_Defer =>
3882 Check_Arg_Count (0);
3884 -- The only required semantic processing is to check the
3885 -- placement. This pragma must appear at the start of the
3886 -- statement sequence of a handled sequence of statements.
3888 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
3889 or else N /= First (Statements (Parent (N)))
3900 -- Note: this pragma also has some specific processing in Par.Prag
3901 -- because we want to set the Ada 83 mode switch during parsing.
3903 when Pragma_Ada_83 =>
3907 Check_Arg_Count (0);
3915 -- Note: this pragma also has some specific processing in Par.Prag
3916 -- because we want to set the Ada 83 mode switch during parsing.
3918 when Pragma_Ada_95 =>
3922 Check_Arg_Count (0);
3924 ----------------------
3925 -- All_Calls_Remote --
3926 ----------------------
3928 -- pragma All_Calls_Remote [(library_package_NAME)];
3930 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
3931 Lib_Entity : Entity_Id;
3934 Check_Ada_83_Warning;
3935 Check_Valid_Library_Unit_Pragma;
3937 if Nkind (N) = N_Null_Statement then
3941 Lib_Entity := Find_Lib_Unit_Name;
3943 -- This pragma should only apply to a RCI unit (RM E.2.3(23)).
3945 if Present (Lib_Entity)
3946 and then not Debug_Flag_U
3948 if not Is_Remote_Call_Interface (Lib_Entity) then
3949 Error_Pragma ("pragma% only apply to rci unit");
3951 -- Set flag for entity of the library unit
3954 Set_Has_All_Calls_Remote (Lib_Entity);
3958 end All_Calls_Remote;
3964 -- pragma Annotate (IDENTIFIER {, ARG});
3965 -- ARG ::= NAME | EXPRESSION
3967 when Pragma_Annotate => Annotate : begin
3969 Check_At_Least_N_Arguments (1);
3970 Check_Arg_Is_Identifier (Arg1);
3973 Arg : Node_Id := Arg2;
3977 while Present (Arg) loop
3978 Exp := Expression (Arg);
3981 if Is_Entity_Name (Exp) then
3984 elsif Nkind (Exp) = N_String_Literal then
3985 Resolve (Exp, Standard_String);
3987 elsif Is_Overloaded (Exp) then
3988 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
4003 -- pragma Assert (Boolean_EXPRESSION [, static_string_EXPRESSION]);
4005 when Pragma_Assert =>
4007 Check_No_Identifiers;
4009 if Arg_Count > 1 then
4010 Check_Arg_Count (2);
4011 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4014 -- If expansion is active and assertions are inactive, then
4015 -- we rewrite the Assertion as:
4017 -- if False and then condition then
4021 -- The reason we do this rewriting during semantic analysis
4022 -- rather than as part of normal expansion is that we cannot
4023 -- analyze and expand the code for the boolean expression
4024 -- directly, or it may cause insertion of actions that would
4025 -- escape the attempt to suppress the assertion code.
4027 if Expander_Active and not Assertions_Enabled then
4029 Make_If_Statement (Loc,
4032 Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
4033 Right_Opnd => Get_Pragma_Arg (Arg1)),
4034 Then_Statements => New_List (
4035 Make_Null_Statement (Loc))));
4039 -- Otherwise (if assertions are enabled, or if we are not
4040 -- operating with expansion active), then we just analyze
4041 -- and resolve the expression.
4044 Analyze_And_Resolve (Expression (Arg1), Any_Boolean);
4051 -- pragma AST_Entry (entry_IDENTIFIER);
4053 when Pragma_AST_Entry => AST_Entry : declare
4059 Check_Arg_Count (1);
4060 Check_No_Identifiers;
4061 Check_Arg_Is_Local_Name (Arg1);
4062 Ent := Entity (Expression (Arg1));
4064 -- Note: the implementation of the AST_Entry pragma could handle
4065 -- the entry family case fine, but for now we are consistent with
4066 -- the DEC rules, and do not allow the pragma, which of course
4067 -- has the effect of also forbidding the attribute.
4069 if Ekind (Ent) /= E_Entry then
4071 ("pragma% argument must be simple entry name", Arg1);
4073 elsif Is_AST_Entry (Ent) then
4075 ("duplicate % pragma for entry", Arg1);
4077 elsif Has_Homonym (Ent) then
4079 ("pragma% argument cannot specify overloaded entry", Arg1);
4083 FF : constant Entity_Id := First_Formal (Ent);
4086 if Present (FF) then
4087 if Present (Next_Formal (FF)) then
4089 ("entry for pragma% can have only one argument",
4092 elsif Parameter_Mode (FF) /= E_In_Parameter then
4094 ("entry parameter for pragma% must have mode IN",
4100 Set_Is_AST_Entry (Ent);
4108 -- pragma Asynchronous (LOCAL_NAME);
4110 when Pragma_Asynchronous => Asynchronous : declare
4118 procedure Process_Async_Pragma;
4119 -- Common processing for procedure and access-to-procedure case
4121 --------------------------
4122 -- Process_Async_Pragma --
4123 --------------------------
4125 procedure Process_Async_Pragma is
4127 if not Present (L) then
4128 Set_Is_Asynchronous (Nm);
4132 -- The formals should be of mode IN (RM E.4.1(6))
4135 while Present (S) loop
4136 Formal := Defining_Identifier (S);
4138 if Nkind (Formal) = N_Defining_Identifier
4139 and then Ekind (Formal) /= E_In_Parameter
4142 ("pragma% procedure can only have IN parameter",
4149 Set_Is_Asynchronous (Nm);
4150 end Process_Async_Pragma;
4152 -- Start of processing for pragma Asynchronous
4155 Check_Ada_83_Warning;
4156 Check_No_Identifiers;
4157 Check_Arg_Count (1);
4158 Check_Arg_Is_Local_Name (Arg1);
4160 if Debug_Flag_U then
4164 C_Ent := Cunit_Entity (Current_Sem_Unit);
4165 Analyze (Expression (Arg1));
4166 Nm := Entity (Expression (Arg1));
4168 if not Is_Remote_Call_Interface (C_Ent)
4169 and then not Is_Remote_Types (C_Ent)
4171 -- This pragma should only appear in an RCI or Remote Types
4172 -- unit (RM E.4.1(4))
4175 ("pragma% not in Remote_Call_Interface or " &
4176 "Remote_Types unit");
4179 if Ekind (Nm) = E_Procedure
4180 and then Nkind (Parent (Nm)) = N_Procedure_Specification
4182 if not Is_Remote_Call_Interface (Nm) then
4184 ("pragma% cannot be applied on non-remote procedure",
4188 L := Parameter_Specifications (Parent (Nm));
4189 Process_Async_Pragma;
4192 elsif Ekind (Nm) = E_Function then
4194 ("pragma% cannot be applied to function", Arg1);
4196 elsif Ekind (Nm) = E_Record_Type
4197 and then Present (Corresponding_Remote_Type (Nm))
4199 N := Declaration_Node (Corresponding_Remote_Type (Nm));
4201 if Nkind (N) = N_Full_Type_Declaration
4202 and then Nkind (Type_Definition (N)) =
4203 N_Access_Procedure_Definition
4205 L := Parameter_Specifications (Type_Definition (N));
4206 Process_Async_Pragma;
4210 ("pragma% cannot reference access-to-function type",
4214 -- Only other possibility is Access-to-class-wide type
4216 elsif Is_Access_Type (Nm)
4217 and then Is_Class_Wide_Type (Designated_Type (Nm))
4219 Check_First_Subtype (Arg1);
4220 Set_Is_Asynchronous (Nm);
4221 if Expander_Active then
4222 RACW_Type_Is_Asynchronous (Nm);
4226 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
4234 -- pragma Atomic (LOCAL_NAME);
4236 when Pragma_Atomic =>
4237 Process_Atomic_Shared_Volatile;
4239 -----------------------
4240 -- Atomic_Components --
4241 -----------------------
4243 -- pragma Atomic_Components (array_LOCAL_NAME);
4245 -- This processing is shared by Volatile_Components
4247 when Pragma_Atomic_Components |
4248 Pragma_Volatile_Components =>
4250 Atomic_Components : declare
4257 Check_Ada_83_Warning;
4258 Check_No_Identifiers;
4259 Check_Arg_Count (1);
4260 Check_Arg_Is_Local_Name (Arg1);
4261 E_Id := Expression (Arg1);
4263 if Etype (E_Id) = Any_Type then
4269 if Rep_Item_Too_Early (E, N)
4271 Rep_Item_Too_Late (E, N)
4276 D := Declaration_Node (E);
4279 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
4281 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
4282 and then Nkind (D) = N_Object_Declaration
4283 and then Nkind (Object_Definition (D)) =
4284 N_Constrained_Array_Definition)
4286 -- The flag is set on the object, or on the base type
4288 if Nkind (D) /= N_Object_Declaration then
4292 Set_Has_Volatile_Components (E);
4294 if Prag_Id = Pragma_Atomic_Components then
4295 Set_Has_Atomic_Components (E);
4297 if Is_Packed (E) then
4298 Set_Is_Packed (E, False);
4301 ("?Pack canceled, cannot pack atomic components",
4307 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
4309 end Atomic_Components;
4311 --------------------
4312 -- Attach_Handler --
4313 --------------------
4315 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
4317 when Pragma_Attach_Handler =>
4318 Check_Ada_83_Warning;
4319 Check_No_Identifiers;
4320 Check_Arg_Count (2);
4322 if No_Run_Time_Mode then
4323 Error_Msg_CRT ("Attach_Handler pragma", N);
4325 Check_Interrupt_Or_Attach_Handler;
4327 -- The expression that designates the attribute may
4328 -- depend on a discriminant, and is therefore a per-
4329 -- object expression, to be expanded in the init proc.
4330 -- If expansion is enabled, perform semantic checks
4333 if Expander_Active then
4335 Temp : constant Node_Id :=
4336 New_Copy_Tree (Expression (Arg2));
4338 Set_Parent (Temp, N);
4339 Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
4343 Analyze (Expression (Arg2));
4344 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
4347 Process_Interrupt_Or_Attach_Handler;
4350 --------------------
4351 -- C_Pass_By_Copy --
4352 --------------------
4354 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
4356 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
4362 Check_Valid_Configuration_Pragma;
4363 Check_Arg_Count (1);
4364 Check_Optional_Identifier (Arg1, "max_size");
4366 Arg := Expression (Arg1);
4367 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
4369 Val := Expr_Value (Arg);
4373 ("maximum size for pragma% must be positive", Arg1);
4375 elsif UI_Is_In_Int_Range (Val) then
4376 Default_C_Record_Mechanism := UI_To_Int (Val);
4378 -- If a giant value is given, Int'Last will do well enough.
4379 -- If sometime someone complains that a record larger than
4380 -- two gigabytes is not copied, we will worry about it then!
4383 Default_C_Record_Mechanism := Mechanism_Type'Last;
4391 -- pragma Comment (static_string_EXPRESSION)
4393 -- Processing for pragma Comment shares the circuitry for
4394 -- pragma Ident. The only differences are that Ident enforces
4395 -- a limit of 31 characters on its argument, and also enforces
4396 -- limitations on placement for DEC compatibility. Pragma
4397 -- Comment shares neither of these restrictions.
4403 -- pragma Common_Object (
4404 -- [Internal =>] LOCAL_NAME,
4405 -- [, [External =>] EXTERNAL_SYMBOL]
4406 -- [, [Size =>] EXTERNAL_SYMBOL]);
4408 -- Processing for this pragma is shared with Psect_Object
4410 --------------------------
4411 -- Compile_Time_Warning --
4412 --------------------------
4414 -- pragma Compile_Time_Warning
4415 -- (boolean_EXPRESSION, static_string_EXPRESSION);
4417 when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
4418 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
4422 Check_Arg_Count (2);
4423 Check_No_Identifiers;
4424 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4425 Analyze_And_Resolve (Arg1x, Standard_Boolean);
4427 if Compile_Time_Known_Value (Arg1x) then
4428 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
4429 String_To_Name_Buffer (Strval (Get_Pragma_Arg (Arg2)));
4430 Add_Char_To_Name_Buffer ('?');
4433 Msg : String (1 .. Name_Len) :=
4434 Name_Buffer (1 .. Name_Len);
4439 -- This loop looks for multiple lines separated by
4440 -- ASCII.LF and breaks them into continuation error
4441 -- messages marked with the usual back slash.
4444 for S in 2 .. Msg'Length - 1 loop
4445 if Msg (S) = ASCII.LF then
4447 Error_Msg_N (Msg (B .. S), Arg1);
4453 Error_Msg_N (Msg (B .. Msg'Length), Arg1);
4457 end Compile_Time_Warning;
4459 ----------------------------
4460 -- Complex_Representation --
4461 ----------------------------
4463 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
4465 when Pragma_Complex_Representation => Complex_Representation : declare
4472 Check_Arg_Count (1);
4473 Check_Optional_Identifier (Arg1, Name_Entity);
4474 Check_Arg_Is_Local_Name (Arg1);
4475 E_Id := Expression (Arg1);
4477 if Etype (E_Id) = Any_Type then
4483 if not Is_Record_Type (E) then
4485 ("argument for pragma% must be record type", Arg1);
4488 Ent := First_Entity (E);
4491 or else No (Next_Entity (Ent))
4492 or else Present (Next_Entity (Next_Entity (Ent)))
4493 or else not Is_Floating_Point_Type (Etype (Ent))
4494 or else Etype (Ent) /= Etype (Next_Entity (Ent))
4497 ("record for pragma% must have two fields of same fpt type",
4501 Set_Has_Complex_Representation (Base_Type (E));
4503 end Complex_Representation;
4505 -------------------------
4506 -- Component_Alignment --
4507 -------------------------
4509 -- pragma Component_Alignment (
4510 -- [Form =>] ALIGNMENT_CHOICE
4511 -- [, [Name =>] type_LOCAL_NAME]);
4513 -- ALIGNMENT_CHOICE ::=
4515 -- | Component_Size_4
4519 when Pragma_Component_Alignment => Component_AlignmentP : declare
4520 Args : Args_List (1 .. 2);
4521 Names : constant Name_List (1 .. 2) := (
4525 Form : Node_Id renames Args (1);
4526 Name : Node_Id renames Args (2);
4528 Atype : Component_Alignment_Kind;
4533 Gather_Associations (Names, Args);
4536 Error_Pragma ("missing Form argument for pragma%");
4539 Check_Arg_Is_Identifier (Form);
4541 -- Get proper alignment, note that Default = Component_Size
4542 -- on all machines we have so far, and we want to set this
4543 -- value rather than the default value to indicate that it
4544 -- has been explicitly set (and thus will not get overridden
4545 -- by the default component alignment for the current scope)
4547 if Chars (Form) = Name_Component_Size then
4548 Atype := Calign_Component_Size;
4550 elsif Chars (Form) = Name_Component_Size_4 then
4551 Atype := Calign_Component_Size_4;
4553 elsif Chars (Form) = Name_Default then
4554 Atype := Calign_Component_Size;
4556 elsif Chars (Form) = Name_Storage_Unit then
4557 Atype := Calign_Storage_Unit;
4561 ("invalid Form parameter for pragma%", Form);
4564 -- Case with no name, supplied, affects scope table entry
4568 (Scope_Stack.Last).Component_Alignment_Default := Atype;
4570 -- Case of name supplied
4573 Check_Arg_Is_Local_Name (Name);
4575 Typ := Entity (Name);
4578 or else Rep_Item_Too_Early (Typ, N)
4582 Typ := Underlying_Type (Typ);
4585 if not Is_Record_Type (Typ)
4586 and then not Is_Array_Type (Typ)
4589 ("Name parameter of pragma% must identify record or " &
4590 "array type", Name);
4593 -- An explicit Component_Alignment pragma overrides an
4594 -- implicit pragma Pack, but not an explicit one.
4596 if not Has_Pragma_Pack (Base_Type (Typ)) then
4597 Set_Is_Packed (Base_Type (Typ), False);
4598 Set_Component_Alignment (Base_Type (Typ), Atype);
4601 end Component_AlignmentP;
4607 -- pragma Controlled (first_subtype_LOCAL_NAME);
4609 when Pragma_Controlled => Controlled : declare
4613 Check_No_Identifiers;
4614 Check_Arg_Count (1);
4615 Check_Arg_Is_Local_Name (Arg1);
4616 Arg := Expression (Arg1);
4618 if not Is_Entity_Name (Arg)
4619 or else not Is_Access_Type (Entity (Arg))
4621 Error_Pragma_Arg ("pragma% requires access type", Arg1);
4623 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
4631 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
4632 -- [Entity =>] LOCAL_NAME);
4634 when Pragma_Convention => Convention : declare
4638 Check_Ada_83_Warning;
4639 Check_Arg_Count (2);
4640 Process_Convention (C, E);
4643 ---------------------------
4644 -- Convention_Identifier --
4645 ---------------------------
4647 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
4648 -- [Convention =>] convention_IDENTIFIER);
4650 when Pragma_Convention_Identifier => Convention_Identifier : declare
4656 Check_Arg_Count (2);
4657 Check_Optional_Identifier (Arg1, Name_Name);
4658 Check_Optional_Identifier (Arg2, Name_Convention);
4659 Check_Arg_Is_Identifier (Arg1);
4660 Check_Arg_Is_Identifier (Arg1);
4661 Idnam := Chars (Expression (Arg1));
4662 Cname := Chars (Expression (Arg2));
4664 if Is_Convention_Name (Cname) then
4665 Record_Convention_Identifier
4666 (Idnam, Get_Convention_Id (Cname));
4669 ("second arg for % pragma must be convention", Arg2);
4671 end Convention_Identifier;
4677 -- pragma CPP_Class ([Entity =>] local_NAME)
4679 when Pragma_CPP_Class => CPP_Class : declare
4682 Default_DTC : Entity_Id := Empty;
4683 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4689 Check_Arg_Count (1);
4690 Check_Optional_Identifier (Arg1, Name_Entity);
4691 Check_Arg_Is_Local_Name (Arg1);
4693 Arg := Expression (Arg1);
4696 if Etype (Arg) = Any_Type then
4700 if not Is_Entity_Name (Arg)
4701 or else not Is_Type (Entity (Arg))
4703 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
4706 Typ := Entity (Arg);
4708 if not Is_Record_Type (Typ) then
4709 Error_Pragma_Arg ("pragma% applicable to a record, "
4710 & "tagged record or record extension", Arg1);
4713 Default_DTC := First_Component (Typ);
4714 while Present (Default_DTC)
4715 and then Etype (Default_DTC) /= VTP_Type
4717 Next_Component (Default_DTC);
4720 -- Case of non tagged type
4722 if not Is_Tagged_Type (Typ) then
4723 Set_Is_CPP_Class (Typ);
4725 if Present (Default_DTC) then
4727 ("only tagged records can contain vtable pointers", Arg1);
4730 -- Case of tagged type with no vtable ptr
4732 -- What is test for Typ = Root_Typ (Typ) about here ???
4734 elsif Is_Tagged_Type (Typ)
4735 and then Typ = Root_Type (Typ)
4736 and then No (Default_DTC)
4739 ("a cpp_class must contain a vtable pointer", Arg1);
4741 -- Tagged type that has a vtable ptr
4743 elsif Present (Default_DTC) then
4744 Set_Is_CPP_Class (Typ);
4745 Set_Is_Limited_Record (Typ);
4746 Set_Is_Tag (Default_DTC);
4747 Set_DT_Entry_Count (Default_DTC, No_Uint);
4749 -- Since a CPP type has no direct link to its associated tag
4750 -- most tags checks cannot be performed
4752 Set_Kill_Tag_Checks (Typ);
4753 Set_Kill_Tag_Checks (Class_Wide_Type (Typ));
4755 -- Get rid of the _tag component when there was one.
4756 -- It is only useful for regular tagged types
4758 if Expander_Active and then Typ = Root_Type (Typ) then
4760 Tag_C := Tag_Component (Typ);
4761 C := First_Entity (Typ);
4764 Set_First_Entity (Typ, Next_Entity (Tag_C));
4767 while Next_Entity (C) /= Tag_C loop
4771 Set_Next_Entity (C, Next_Entity (Tag_C));
4777 ---------------------
4778 -- CPP_Constructor --
4779 ---------------------
4781 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME);
4783 when Pragma_CPP_Constructor => CPP_Constructor : declare
4789 Check_Arg_Count (1);
4790 Check_Optional_Identifier (Arg1, Name_Entity);
4791 Check_Arg_Is_Local_Name (Arg1);
4793 Id := Expression (Arg1);
4794 Find_Program_Unit_Name (Id);
4796 -- If we did not find the name, we are done
4798 if Etype (Id) = Any_Type then
4802 Def_Id := Entity (Id);
4804 if Ekind (Def_Id) = E_Function
4805 and then Is_Class_Wide_Type (Etype (Def_Id))
4806 and then Is_CPP_Class (Etype (Etype (Def_Id)))
4808 -- What the heck is this??? this pragma allows only 1 arg
4810 if Arg_Count >= 2 then
4811 Check_At_Most_N_Arguments (3);
4812 Process_Interface_Name (Def_Id, Arg2, Arg3);
4815 if No (Parameter_Specifications (Parent (Def_Id))) then
4816 Set_Has_Completion (Def_Id);
4817 Set_Is_Constructor (Def_Id);
4820 ("non-default constructors not implemented", Arg1);
4825 ("pragma% requires function returning a 'C'P'P_Class type",
4828 end CPP_Constructor;
4834 -- pragma CPP_Virtual
4835 -- [Entity =>] LOCAL_NAME
4836 -- [ [Vtable_Ptr =>] LOCAL_NAME,
4837 -- [Position =>] static_integer_EXPRESSION]);
4839 when Pragma_CPP_Virtual => CPP_Virtual : declare
4843 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4850 if Arg_Count = 3 then
4851 Check_Optional_Identifier (Arg2, "vtable_ptr");
4853 -- We allow Entry_Count as well as Position for the third
4854 -- parameter for back compatibility with versions of GNAT
4855 -- before version 3.12. The documentation has always said
4856 -- Position, but the code up to 3.12 said Entry_Count.
4858 if Chars (Arg3) /= Name_Position then
4859 Check_Optional_Identifier (Arg3, "entry_count");
4863 Check_Arg_Count (1);
4866 Check_Optional_Identifier (Arg1, Name_Entity);
4867 Check_Arg_Is_Local_Name (Arg1);
4869 -- First argument must be a subprogram name
4871 Arg := Expression (Arg1);
4872 Find_Program_Unit_Name (Arg);
4874 if Etype (Arg) = Any_Type then
4877 Subp := Entity (Arg);
4880 if not (Is_Subprogram (Subp)
4881 and then Is_Dispatching_Operation (Subp))
4884 ("pragma% must reference a primitive operation", Arg1);
4887 Typ := Find_Dispatching_Type (Subp);
4889 -- If only one Argument defaults are :
4890 -- . DTC_Entity is the default Vtable pointer
4891 -- . DT_Position will be set at the freezing point
4893 if Arg_Count = 1 then
4894 Set_DTC_Entity (Subp, Tag_Component (Typ));
4898 -- Second argument is a component name of type Vtable_Ptr
4900 Arg := Expression (Arg2);
4902 if Nkind (Arg) /= N_Identifier then
4903 Error_Msg_NE ("must be a& component name", Arg, Typ);
4907 DTC := First_Component (Typ);
4908 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
4909 Next_Component (DTC);
4913 Error_Msg_NE ("must be a& component name", Arg, Typ);
4916 elsif Etype (DTC) /= VTP_Type then
4917 Wrong_Type (Arg, VTP_Type);
4921 -- Third argument is an integer (DT_Position)
4923 Arg := Expression (Arg3);
4924 Analyze_And_Resolve (Arg, Any_Integer);
4926 if not Is_Static_Expression (Arg) then
4927 Flag_Non_Static_Expr
4928 ("third argument of pragma CPP_Virtual must be static!",
4933 V := Expr_Value (Expression (Arg3));
4937 ("third argument of pragma% must be positive",
4941 Set_DTC_Entity (Subp, DTC);
4942 Set_DT_Position (Subp, V);
4951 -- pragma CPP_Vtable (
4952 -- [Entity =>] LOCAL_NAME
4953 -- [Vtable_Ptr =>] LOCAL_NAME,
4954 -- [Entry_Count =>] static_integer_EXPRESSION);
4956 when Pragma_CPP_Vtable => CPP_Vtable : declare
4959 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
4966 Check_Arg_Count (3);
4967 Check_Optional_Identifier (Arg1, Name_Entity);
4968 Check_Optional_Identifier (Arg2, "vtable_ptr");
4969 Check_Optional_Identifier (Arg3, "entry_count");
4970 Check_Arg_Is_Local_Name (Arg1);
4972 -- First argument is a record type name
4974 Arg := Expression (Arg1);
4977 if Etype (Arg) = Any_Type then
4980 Typ := Entity (Arg);
4983 if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
4984 Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
4987 -- Second argument is a component name of type Vtable_Ptr
4989 Arg := Expression (Arg2);
4991 if Nkind (Arg) /= N_Identifier then
4992 Error_Msg_NE ("must be a& component name", Arg, Typ);
4996 DTC := First_Component (Typ);
4997 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
4998 Next_Component (DTC);
5002 Error_Msg_NE ("must be a& component name", Arg, Typ);
5005 elsif Etype (DTC) /= VTP_Type then
5006 Wrong_Type (DTC, VTP_Type);
5009 -- If it is the first pragma Vtable, This becomes the default tag
5011 elsif (not Is_Tag (DTC))
5012 and then DT_Entry_Count (Tag_Component (Typ)) = No_Uint
5014 Set_Is_Tag (Tag_Component (Typ), False);
5015 Set_Is_Tag (DTC, True);
5016 Set_DT_Entry_Count (DTC, No_Uint);
5019 -- Those pragmas must appear before any primitive operation
5020 -- definition (except inherited ones) otherwise the default
5023 Elmt := First_Elmt (Primitive_Operations (Typ));
5024 while Present (Elmt) loop
5025 if No (Alias (Node (Elmt))) then
5026 Error_Msg_Sloc := Sloc (Node (Elmt));
5028 ("pragma% must appear before this primitive operation");
5034 -- Third argument is an integer (DT_Entry_Count)
5036 Arg := Expression (Arg3);
5037 Analyze_And_Resolve (Arg, Any_Integer);
5039 if not Is_Static_Expression (Arg) then
5040 Flag_Non_Static_Expr
5041 ("entry count for pragma CPP_Vtable must be a static " &
5042 "expression!", Arg3);
5046 V := Expr_Value (Expression (Arg3));
5050 ("entry count for pragma% must be positive", Arg3);
5052 Set_DT_Entry_Count (DTC, V);
5061 -- pragma Debug (PROCEDURE_CALL_STATEMENT);
5063 when Pragma_Debug => Debug : begin
5066 -- If assertions are enabled, and we are expanding code, then
5067 -- we rewrite the pragma with its corresponding procedure call
5068 -- and then analyze the call.
5070 if Assertions_Enabled and Expander_Active then
5071 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5074 -- Otherwise we work a bit to get a tree that makes sense
5075 -- for ASIS purposes, namely a pragma with an analyzed
5076 -- argument that looks like a procedure call.
5079 Expander_Mode_Save_And_Set (False);
5080 Rewrite (N, Relocate_Node (Debug_Statement (N)));
5084 Chars => Name_Debug,
5085 Pragma_Argument_Associations =>
5086 New_List (Relocate_Node (N))));
5087 Expander_Mode_Restore;
5095 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
5097 when Pragma_Discard_Names => Discard_Names : declare
5102 Check_Ada_83_Warning;
5104 -- Deal with configuration pragma case
5106 if Arg_Count = 0 and then Is_Configuration_Pragma then
5107 Global_Discard_Names := True;
5110 -- Otherwise, check correct appropriate context
5113 Check_Is_In_Decl_Part_Or_Package_Spec;
5115 if Arg_Count = 0 then
5117 -- If there is no parameter, then from now on this pragma
5118 -- applies to any enumeration, exception or tagged type
5119 -- defined in the current declarative part.
5121 Set_Discard_Names (Current_Scope);
5125 Check_Arg_Count (1);
5126 Check_Optional_Identifier (Arg1, Name_On);
5127 Check_Arg_Is_Local_Name (Arg1);
5128 E_Id := Expression (Arg1);
5130 if Etype (E_Id) = Any_Type then
5136 if (Is_First_Subtype (E)
5137 and then (Is_Enumeration_Type (E)
5138 or else Is_Tagged_Type (E)))
5139 or else Ekind (E) = E_Exception
5141 Set_Discard_Names (E);
5144 ("inappropriate entity for pragma%", Arg1);
5154 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
5156 when Pragma_Elaborate => Elaborate : declare
5158 Parent_Node : Node_Id;
5163 -- Pragma must be in context items list of a compilation unit
5165 if not Is_List_Member (N) then
5170 Plist := List_Containing (N);
5171 Parent_Node := Parent (Plist);
5173 if Parent_Node = Empty
5174 or else Nkind (Parent_Node) /= N_Compilation_Unit
5175 or else Context_Items (Parent_Node) /= Plist
5182 -- Must be at least one argument
5184 if Arg_Count = 0 then
5185 Error_Pragma ("pragma% requires at least one argument");
5188 -- In Ada 83 mode, there can be no items following it in the
5189 -- context list except other pragmas and implicit with clauses
5190 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
5191 -- placement rule does not apply.
5193 if Ada_83 and then Comes_From_Source (N) then
5196 while Present (Citem) loop
5197 if Nkind (Citem) = N_Pragma
5198 or else (Nkind (Citem) = N_With_Clause
5199 and then Implicit_With (Citem))
5204 ("(Ada 83) pragma% must be at end of context clause");
5211 -- Finally, the arguments must all be units mentioned in a with
5212 -- clause in the same context clause. Note we already checked
5213 -- (in Par.Prag) that the arguments are either identifiers or
5216 Outer : while Present (Arg) loop
5217 Citem := First (Plist);
5219 Inner : while Citem /= N loop
5220 if Nkind (Citem) = N_With_Clause
5221 and then Same_Name (Name (Citem), Expression (Arg))
5223 Set_Elaborate_Present (Citem, True);
5224 Set_Unit_Name (Expression (Arg), Name (Citem));
5225 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5234 ("argument of pragma% is not with'ed unit", Arg);
5240 -- Give a warning if operating in static mode with -gnatwl
5241 -- (elaboration warnings eanbled) switch set.
5243 if Elab_Warnings and not Dynamic_Elaboration_Checks then
5245 ("?use of pragma Elaborate may not be safe", N);
5247 ("?use pragma Elaborate_All instead if possible", N);
5255 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
5257 when Pragma_Elaborate_All => Elaborate_All : declare
5259 Parent_Node : Node_Id;
5264 Check_Ada_83_Warning;
5266 -- Pragma must be in context items list of a compilation unit
5268 if not Is_List_Member (N) then
5273 Plist := List_Containing (N);
5274 Parent_Node := Parent (Plist);
5276 if Parent_Node = Empty
5277 or else Nkind (Parent_Node) /= N_Compilation_Unit
5278 or else Context_Items (Parent_Node) /= Plist
5285 -- Must be at least one argument
5287 if Arg_Count = 0 then
5288 Error_Pragma ("pragma% requires at least one argument");
5291 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
5292 -- have to appear at the end of the context clause, but may
5293 -- appear mixed in with other items, even in Ada 83 mode.
5295 -- Final check: the arguments must all be units mentioned in
5296 -- a with clause in the same context clause. Note that we
5297 -- already checked (in Par.Prag) that all the arguments are
5298 -- either identifiers or selected components.
5301 Outr : while Present (Arg) loop
5302 Citem := First (Plist);
5304 Innr : while Citem /= N loop
5305 if Nkind (Citem) = N_With_Clause
5306 and then Same_Name (Name (Citem), Expression (Arg))
5308 Set_Elaborate_All_Present (Citem, True);
5309 Set_Unit_Name (Expression (Arg), Name (Citem));
5310 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5318 Set_Error_Posted (N);
5320 ("argument of pragma% is not with'ed unit", Arg);
5327 --------------------
5328 -- Elaborate_Body --
5329 --------------------
5331 -- pragma Elaborate_Body [( library_unit_NAME )];
5333 when Pragma_Elaborate_Body => Elaborate_Body : declare
5334 Cunit_Node : Node_Id;
5335 Cunit_Ent : Entity_Id;
5338 Check_Ada_83_Warning;
5339 Check_Valid_Library_Unit_Pragma;
5341 if Nkind (N) = N_Null_Statement then
5345 Cunit_Node := Cunit (Current_Sem_Unit);
5346 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
5348 if Nkind (Unit (Cunit_Node)) = N_Package_Body
5350 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
5352 Error_Pragma ("pragma% must refer to a spec, not a body");
5354 Set_Body_Required (Cunit_Node, True);
5355 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
5357 -- If we are in dynamic elaboration mode, then we suppress
5358 -- elaboration warnings for the unit, since it is definitely
5359 -- fine NOT to do dynamic checks at the first level (and such
5360 -- checks will be suppressed because no elaboration boolean
5361 -- is created for Elaborate_Body packages).
5363 -- But in the static model of elaboration, Elaborate_Body is
5364 -- definitely NOT good enough to ensure elaboration safety on
5365 -- its own, since the body may WITH other units that are not
5366 -- safe from an elaboration point of view, so a client must
5367 -- still do an Elaborate_All on such units.
5369 -- Debug flag -gnatdD restores the old behavior of 3.13,
5370 -- where Elaborate_Body always suppressed elab warnings.
5372 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
5373 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
5378 ------------------------
5379 -- Elaboration_Checks --
5380 ------------------------
5382 -- pragma Elaboration_Checks (Static | Dynamic);
5384 when Pragma_Elaboration_Checks =>
5386 Check_Arg_Count (1);
5387 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
5388 Dynamic_Elaboration_Checks :=
5389 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
5395 -- pragma Eliminate (
5396 -- [Unit_Name =>] IDENTIFIER |
5397 -- SELECTED_COMPONENT
5398 -- [,[Entity =>] IDENTIFIER |
5399 -- SELECTED_COMPONENT |
5401 -- [,[Parameter_Types =>] PARAMETER_TYPES]
5402 -- [,[Result_Type =>] result_SUBTYPE_NAME]
5403 -- [,[Homonym_Number =>] INTEGER_LITERAL]);
5405 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
5406 -- SUBTYPE_NAME ::= STRING_LITERAL
5408 when Pragma_Eliminate => Eliminate : declare
5409 Args : Args_List (1 .. 5);
5410 Names : constant Name_List (1 .. 5) := (
5413 Name_Parameter_Types,
5415 Name_Homonym_Number);
5417 Unit_Name : Node_Id renames Args (1);
5418 Entity : Node_Id renames Args (2);
5419 Parameter_Types : Node_Id renames Args (3);
5420 Result_Type : Node_Id renames Args (4);
5421 Homonym_Number : Node_Id renames Args (5);
5425 Check_Valid_Configuration_Pragma;
5426 Gather_Associations (Names, Args);
5428 if No (Unit_Name) then
5429 Error_Pragma ("missing Unit_Name argument for pragma%");
5433 and then (Present (Parameter_Types)
5435 Present (Result_Type)
5437 Present (Homonym_Number))
5439 Error_Pragma ("missing Entity argument for pragma%");
5442 Process_Eliminate_Pragma
5451 --------------------------
5452 -- Explicit_Overriding --
5453 --------------------------
5455 when Pragma_Explicit_Overriding =>
5456 Check_Valid_Configuration_Pragma;
5457 Check_Arg_Count (0);
5458 Explicit_Overriding := True;
5465 -- [ Convention =>] convention_IDENTIFIER,
5466 -- [ Entity =>] local_NAME
5467 -- [, [External_Name =>] static_string_EXPRESSION ]
5468 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5470 when Pragma_Export => Export : declare
5475 Check_Ada_83_Warning;
5476 Check_At_Least_N_Arguments (2);
5477 Check_At_Most_N_Arguments (4);
5478 Process_Convention (C, Def_Id);
5480 if Ekind (Def_Id) /= E_Constant then
5481 Note_Possible_Modification (Expression (Arg2));
5484 Process_Interface_Name (Def_Id, Arg3, Arg4);
5485 Set_Exported (Def_Id, Arg2);
5488 ----------------------
5489 -- Export_Exception --
5490 ----------------------
5492 -- pragma Export_Exception (
5493 -- [Internal =>] LOCAL_NAME,
5494 -- [, [External =>] EXTERNAL_SYMBOL,]
5495 -- [, [Form =>] Ada | VMS]
5496 -- [, [Code =>] static_integer_EXPRESSION]);
5498 when Pragma_Export_Exception => Export_Exception : declare
5499 Args : Args_List (1 .. 4);
5500 Names : constant Name_List (1 .. 4) := (
5506 Internal : Node_Id renames Args (1);
5507 External : Node_Id renames Args (2);
5508 Form : Node_Id renames Args (3);
5509 Code : Node_Id renames Args (4);
5512 if Inside_A_Generic then
5513 Error_Pragma ("pragma% cannot be used for generic entities");
5516 Gather_Associations (Names, Args);
5517 Process_Extended_Import_Export_Exception_Pragma (
5518 Arg_Internal => Internal,
5519 Arg_External => External,
5523 if not Is_VMS_Exception (Entity (Internal)) then
5524 Set_Exported (Entity (Internal), Internal);
5526 end Export_Exception;
5528 ---------------------
5529 -- Export_Function --
5530 ---------------------
5532 -- pragma Export_Function (
5533 -- [Internal =>] LOCAL_NAME,
5534 -- [, [External =>] EXTERNAL_SYMBOL,]
5535 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5536 -- [, [Result_Type =>] TYPE_DESIGNATOR]
5537 -- [, [Mechanism =>] MECHANISM]
5538 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
5540 -- EXTERNAL_SYMBOL ::=
5542 -- | static_string_EXPRESSION
5544 -- PARAMETER_TYPES ::=
5546 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5548 -- TYPE_DESIGNATOR ::=
5550 -- | subtype_Name ' Access
5554 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5556 -- MECHANISM_ASSOCIATION ::=
5557 -- [formal_parameter_NAME =>] MECHANISM_NAME
5559 -- MECHANISM_NAME ::=
5562 -- | Descriptor [([Class =>] CLASS_NAME)]
5564 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5566 when Pragma_Export_Function => Export_Function : declare
5567 Args : Args_List (1 .. 6);
5568 Names : constant Name_List (1 .. 6) := (
5571 Name_Parameter_Types,
5574 Name_Result_Mechanism);
5576 Internal : Node_Id renames Args (1);
5577 External : Node_Id renames Args (2);
5578 Parameter_Types : Node_Id renames Args (3);
5579 Result_Type : Node_Id renames Args (4);
5580 Mechanism : Node_Id renames Args (5);
5581 Result_Mechanism : Node_Id renames Args (6);
5585 Gather_Associations (Names, Args);
5586 Process_Extended_Import_Export_Subprogram_Pragma (
5587 Arg_Internal => Internal,
5588 Arg_External => External,
5589 Arg_Parameter_Types => Parameter_Types,
5590 Arg_Result_Type => Result_Type,
5591 Arg_Mechanism => Mechanism,
5592 Arg_Result_Mechanism => Result_Mechanism);
5593 end Export_Function;
5599 -- pragma Export_Object (
5600 -- [Internal =>] LOCAL_NAME,
5601 -- [, [External =>] EXTERNAL_SYMBOL]
5602 -- [, [Size =>] EXTERNAL_SYMBOL]);
5604 -- EXTERNAL_SYMBOL ::=
5606 -- | static_string_EXPRESSION
5608 -- PARAMETER_TYPES ::=
5610 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5612 -- TYPE_DESIGNATOR ::=
5614 -- | subtype_Name ' Access
5618 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5620 -- MECHANISM_ASSOCIATION ::=
5621 -- [formal_parameter_NAME =>] MECHANISM_NAME
5623 -- MECHANISM_NAME ::=
5626 -- | Descriptor [([Class =>] CLASS_NAME)]
5628 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5630 when Pragma_Export_Object => Export_Object : declare
5631 Args : Args_List (1 .. 3);
5632 Names : constant Name_List (1 .. 3) := (
5637 Internal : Node_Id renames Args (1);
5638 External : Node_Id renames Args (2);
5639 Size : Node_Id renames Args (3);
5643 Gather_Associations (Names, Args);
5644 Process_Extended_Import_Export_Object_Pragma (
5645 Arg_Internal => Internal,
5646 Arg_External => External,
5650 ----------------------
5651 -- Export_Procedure --
5652 ----------------------
5654 -- pragma Export_Procedure (
5655 -- [Internal =>] LOCAL_NAME,
5656 -- [, [External =>] EXTERNAL_SYMBOL,]
5657 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5658 -- [, [Mechanism =>] MECHANISM]);
5660 -- EXTERNAL_SYMBOL ::=
5662 -- | static_string_EXPRESSION
5664 -- PARAMETER_TYPES ::=
5666 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5668 -- TYPE_DESIGNATOR ::=
5670 -- | subtype_Name ' Access
5674 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5676 -- MECHANISM_ASSOCIATION ::=
5677 -- [formal_parameter_NAME =>] MECHANISM_NAME
5679 -- MECHANISM_NAME ::=
5682 -- | Descriptor [([Class =>] CLASS_NAME)]
5684 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5686 when Pragma_Export_Procedure => Export_Procedure : declare
5687 Args : Args_List (1 .. 4);
5688 Names : constant Name_List (1 .. 4) := (
5691 Name_Parameter_Types,
5694 Internal : Node_Id renames Args (1);
5695 External : Node_Id renames Args (2);
5696 Parameter_Types : Node_Id renames Args (3);
5697 Mechanism : Node_Id renames Args (4);
5701 Gather_Associations (Names, Args);
5702 Process_Extended_Import_Export_Subprogram_Pragma (
5703 Arg_Internal => Internal,
5704 Arg_External => External,
5705 Arg_Parameter_Types => Parameter_Types,
5706 Arg_Mechanism => Mechanism);
5707 end Export_Procedure;
5713 -- pragma Export_Value (
5714 -- [Value =>] static_integer_EXPRESSION,
5715 -- [Link_Name =>] static_string_EXPRESSION);
5717 when Pragma_Export_Value =>
5719 Check_Arg_Count (2);
5721 Check_Optional_Identifier (Arg1, Name_Value);
5722 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
5724 Check_Optional_Identifier (Arg2, Name_Link_Name);
5725 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
5727 -----------------------------
5728 -- Export_Valued_Procedure --
5729 -----------------------------
5731 -- pragma Export_Valued_Procedure (
5732 -- [Internal =>] LOCAL_NAME,
5733 -- [, [External =>] EXTERNAL_SYMBOL,]
5734 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5735 -- [, [Mechanism =>] MECHANISM]);
5737 -- EXTERNAL_SYMBOL ::=
5739 -- | static_string_EXPRESSION
5741 -- PARAMETER_TYPES ::=
5743 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5745 -- TYPE_DESIGNATOR ::=
5747 -- | subtype_Name ' Access
5751 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5753 -- MECHANISM_ASSOCIATION ::=
5754 -- [formal_parameter_NAME =>] MECHANISM_NAME
5756 -- MECHANISM_NAME ::=
5759 -- | Descriptor [([Class =>] CLASS_NAME)]
5761 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5763 when Pragma_Export_Valued_Procedure =>
5764 Export_Valued_Procedure : declare
5765 Args : Args_List (1 .. 4);
5766 Names : constant Name_List (1 .. 4) := (
5769 Name_Parameter_Types,
5772 Internal : Node_Id renames Args (1);
5773 External : Node_Id renames Args (2);
5774 Parameter_Types : Node_Id renames Args (3);
5775 Mechanism : Node_Id renames Args (4);
5779 Gather_Associations (Names, Args);
5780 Process_Extended_Import_Export_Subprogram_Pragma (
5781 Arg_Internal => Internal,
5782 Arg_External => External,
5783 Arg_Parameter_Types => Parameter_Types,
5784 Arg_Mechanism => Mechanism);
5785 end Export_Valued_Procedure;
5791 -- pragma Extend_System ([Name =>] Identifier);
5793 when Pragma_Extend_System => Extend_System : declare
5796 Check_Valid_Configuration_Pragma;
5797 Check_Arg_Count (1);
5798 Check_Optional_Identifier (Arg1, Name_Name);
5799 Check_Arg_Is_Identifier (Arg1);
5801 Get_Name_String (Chars (Expression (Arg1)));
5804 and then Name_Buffer (1 .. 4) = "aux_"
5806 if Present (System_Extend_Pragma_Arg) then
5807 if Chars (Expression (Arg1)) =
5808 Chars (Expression (System_Extend_Pragma_Arg))
5812 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
5813 Error_Pragma ("pragma% conflicts with that at#");
5817 System_Extend_Pragma_Arg := Arg1;
5819 if not GNAT_Mode then
5820 System_Extend_Unit := Arg1;
5824 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
5828 ------------------------
5829 -- Extensions_Allowed --
5830 ------------------------
5832 -- pragma Extensions_Allowed (ON | OFF);
5834 when Pragma_Extensions_Allowed =>
5836 Check_Arg_Count (1);
5837 Check_No_Identifiers;
5838 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5839 Extensions_Allowed := (Chars (Expression (Arg1)) = Name_On);
5845 -- pragma External (
5846 -- [ Convention =>] convention_IDENTIFIER,
5847 -- [ Entity =>] local_NAME
5848 -- [, [External_Name =>] static_string_EXPRESSION ]
5849 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5851 when Pragma_External => External : declare
5857 Check_At_Least_N_Arguments (2);
5858 Check_At_Most_N_Arguments (4);
5859 Process_Convention (C, Def_Id);
5860 Note_Possible_Modification (Expression (Arg2));
5861 Process_Interface_Name (Def_Id, Arg3, Arg4);
5862 Set_Exported (Def_Id, Arg2);
5865 --------------------------
5866 -- External_Name_Casing --
5867 --------------------------
5869 -- pragma External_Name_Casing (
5870 -- UPPERCASE | LOWERCASE
5871 -- [, AS_IS | UPPERCASE | LOWERCASE]);
5873 when Pragma_External_Name_Casing =>
5875 External_Name_Casing : declare
5878 Check_No_Identifiers;
5880 if Arg_Count = 2 then
5882 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
5884 case Chars (Get_Pragma_Arg (Arg2)) is
5886 Opt.External_Name_Exp_Casing := As_Is;
5888 when Name_Uppercase =>
5889 Opt.External_Name_Exp_Casing := Uppercase;
5891 when Name_Lowercase =>
5892 Opt.External_Name_Exp_Casing := Lowercase;
5899 Check_Arg_Count (1);
5902 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
5904 case Chars (Get_Pragma_Arg (Arg1)) is
5905 when Name_Uppercase =>
5906 Opt.External_Name_Imp_Casing := Uppercase;
5908 when Name_Lowercase =>
5909 Opt.External_Name_Imp_Casing := Lowercase;
5914 end External_Name_Casing;
5916 ---------------------------
5917 -- Finalize_Storage_Only --
5918 ---------------------------
5920 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
5922 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
5923 Assoc : constant Node_Id := Arg1;
5924 Type_Id : constant Node_Id := Expression (Assoc);
5928 Check_No_Identifiers;
5929 Check_Arg_Count (1);
5930 Check_Arg_Is_Local_Name (Arg1);
5932 Find_Type (Type_Id);
5933 Typ := Entity (Type_Id);
5936 or else Rep_Item_Too_Early (Typ, N)
5940 Typ := Underlying_Type (Typ);
5943 if not Is_Controlled (Typ) then
5944 Error_Pragma ("pragma% must specify controlled type");
5947 Check_First_Subtype (Arg1);
5949 if Finalize_Storage_Only (Typ) then
5950 Error_Pragma ("duplicate pragma%, only one allowed");
5952 elsif not Rep_Item_Too_Late (Typ, N) then
5953 Set_Finalize_Storage_Only (Base_Type (Typ), True);
5955 end Finalize_Storage;
5957 --------------------------
5958 -- Float_Representation --
5959 --------------------------
5961 -- pragma Float_Representation (VAX_Float | IEEE_Float);
5963 when Pragma_Float_Representation => Float_Representation : declare
5971 if Arg_Count = 1 then
5972 Check_Valid_Configuration_Pragma;
5974 Check_Arg_Count (2);
5975 Check_Optional_Identifier (Arg2, Name_Entity);
5976 Check_Arg_Is_Local_Name (Arg2);
5979 Check_No_Identifier (Arg1);
5980 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
5982 if not OpenVMS_On_Target then
5983 if Chars (Expression (Arg1)) = Name_VAX_Float then
5985 ("?pragma% ignored (applies only to Open'V'M'S)");
5991 -- One argument case
5993 if Arg_Count = 1 then
5995 if Chars (Expression (Arg1)) = Name_VAX_Float then
5997 if Opt.Float_Format = 'I' then
5998 Error_Pragma ("'I'E'E'E format previously specified");
6001 Opt.Float_Format := 'V';
6004 if Opt.Float_Format = 'V' then
6005 Error_Pragma ("'V'A'X format previously specified");
6008 Opt.Float_Format := 'I';
6011 Set_Standard_Fpt_Formats;
6013 -- Two argument case
6016 Argx := Get_Pragma_Arg (Arg2);
6018 if not Is_Entity_Name (Argx)
6019 or else not Is_Floating_Point_Type (Entity (Argx))
6022 ("second argument of% pragma must be floating-point type",
6026 Ent := Entity (Argx);
6027 Digs := UI_To_Int (Digits_Value (Ent));
6029 -- Two arguments, VAX_Float case
6031 if Chars (Expression (Arg1)) = Name_VAX_Float then
6034 when 6 => Set_F_Float (Ent);
6035 when 9 => Set_D_Float (Ent);
6036 when 15 => Set_G_Float (Ent);
6040 ("wrong digits value, must be 6,9 or 15", Arg2);
6043 -- Two arguments, IEEE_Float case
6047 when 6 => Set_IEEE_Short (Ent);
6048 when 15 => Set_IEEE_Long (Ent);
6052 ("wrong digits value, must be 6 or 15", Arg2);
6056 end Float_Representation;
6062 -- pragma Ident (static_string_EXPRESSION)
6064 -- Note: pragma Comment shares this processing. Pragma Comment
6065 -- is identical to Ident, except that the restriction of the
6066 -- argument to 31 characters and the placement restrictions
6067 -- are not enforced for pragma Comment.
6069 when Pragma_Ident | Pragma_Comment => Ident : declare
6074 Check_Arg_Count (1);
6075 Check_No_Identifiers;
6076 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
6078 -- For pragma Ident, preserve DEC compatibility by requiring
6079 -- the pragma to appear in a declarative part or package spec.
6081 if Prag_Id = Pragma_Ident then
6082 Check_Is_In_Decl_Part_Or_Package_Spec;
6085 Str := Expr_Value_S (Expression (Arg1));
6092 GP := Parent (Parent (N));
6094 if Nkind (GP) = N_Package_Declaration
6096 Nkind (GP) = N_Generic_Package_Declaration
6101 -- If we have a compilation unit, then record the ident
6102 -- value, checking for improper duplication.
6104 if Nkind (GP) = N_Compilation_Unit then
6105 CS := Ident_String (Current_Sem_Unit);
6107 if Present (CS) then
6109 -- For Ident, we do not permit multiple instances
6111 if Prag_Id = Pragma_Ident then
6112 Error_Pragma ("duplicate% pragma not permitted");
6114 -- For Comment, we concatenate the string, unless we
6115 -- want to preserve the tree structure for ASIS.
6117 elsif not ASIS_Mode then
6118 Start_String (Strval (CS));
6119 Store_String_Char (' ');
6120 Store_String_Chars (Strval (Str));
6121 Set_Strval (CS, End_String);
6125 -- In VMS, the effect of IDENT is achieved by passing
6126 -- IDENTIFICATION=name as a --for-linker switch.
6128 if OpenVMS_On_Target then
6131 ("--for-linker=IDENTIFICATION=");
6132 String_To_Name_Buffer (Strval (Str));
6133 Store_String_Chars (Name_Buffer (1 .. Name_Len));
6135 -- Only the last processed IDENT is saved. The main
6136 -- purpose is so an IDENT associated with a main
6137 -- procedure will be used in preference to an IDENT
6138 -- associated with a with'd package.
6140 Replace_Linker_Option_String
6141 (End_String, "--for-linker=IDENTIFICATION=");
6144 Set_Ident_String (Current_Sem_Unit, Str);
6147 -- For subunits, we just ignore the Ident, since in GNAT
6148 -- these are not separate object files, and hence not
6149 -- separate units in the unit table.
6151 elsif Nkind (GP) = N_Subunit then
6154 -- Otherwise we have a misplaced pragma Ident, but we ignore
6155 -- this if we are in an instantiation, since it comes from
6156 -- a generic, and has no relevance to the instantiation.
6158 elsif Prag_Id = Pragma_Ident then
6159 if Instantiation_Location (Loc) = No_Location then
6160 Error_Pragma ("pragma% only allowed at outer level");
6171 -- [ Convention =>] convention_IDENTIFIER,
6172 -- [ Entity =>] local_NAME
6173 -- [, [External_Name =>] static_string_EXPRESSION ]
6174 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6176 when Pragma_Import =>
6177 Check_Ada_83_Warning;
6178 Check_At_Least_N_Arguments (2);
6179 Check_At_Most_N_Arguments (4);
6180 Process_Import_Or_Interface;
6182 ----------------------
6183 -- Import_Exception --
6184 ----------------------
6186 -- pragma Import_Exception (
6187 -- [Internal =>] LOCAL_NAME,
6188 -- [, [External =>] EXTERNAL_SYMBOL,]
6189 -- [, [Form =>] Ada | VMS]
6190 -- [, [Code =>] static_integer_EXPRESSION]);
6192 when Pragma_Import_Exception => Import_Exception : declare
6193 Args : Args_List (1 .. 4);
6194 Names : constant Name_List (1 .. 4) := (
6200 Internal : Node_Id renames Args (1);
6201 External : Node_Id renames Args (2);
6202 Form : Node_Id renames Args (3);
6203 Code : Node_Id renames Args (4);
6206 Gather_Associations (Names, Args);
6208 if Present (External) and then Present (Code) then
6210 ("cannot give both External and Code options for pragma%");
6213 Process_Extended_Import_Export_Exception_Pragma (
6214 Arg_Internal => Internal,
6215 Arg_External => External,
6219 if not Is_VMS_Exception (Entity (Internal)) then
6220 Set_Imported (Entity (Internal));
6222 end Import_Exception;
6224 ---------------------
6225 -- Import_Function --
6226 ---------------------
6228 -- pragma Import_Function (
6229 -- [Internal =>] LOCAL_NAME,
6230 -- [, [External =>] EXTERNAL_SYMBOL]
6231 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6232 -- [, [Result_Type =>] SUBTYPE_MARK]
6233 -- [, [Mechanism =>] MECHANISM]
6234 -- [, [Result_Mechanism =>] MECHANISM_NAME]
6235 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6237 -- EXTERNAL_SYMBOL ::=
6239 -- | static_string_EXPRESSION
6241 -- PARAMETER_TYPES ::=
6243 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6245 -- TYPE_DESIGNATOR ::=
6247 -- | subtype_Name ' Access
6251 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6253 -- MECHANISM_ASSOCIATION ::=
6254 -- [formal_parameter_NAME =>] MECHANISM_NAME
6256 -- MECHANISM_NAME ::=
6259 -- | Descriptor [([Class =>] CLASS_NAME)]
6261 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6263 when Pragma_Import_Function => Import_Function : declare
6264 Args : Args_List (1 .. 7);
6265 Names : constant Name_List (1 .. 7) := (
6268 Name_Parameter_Types,
6271 Name_Result_Mechanism,
6272 Name_First_Optional_Parameter);
6274 Internal : Node_Id renames Args (1);
6275 External : Node_Id renames Args (2);
6276 Parameter_Types : Node_Id renames Args (3);
6277 Result_Type : Node_Id renames Args (4);
6278 Mechanism : Node_Id renames Args (5);
6279 Result_Mechanism : Node_Id renames Args (6);
6280 First_Optional_Parameter : Node_Id renames Args (7);
6284 Gather_Associations (Names, Args);
6285 Process_Extended_Import_Export_Subprogram_Pragma (
6286 Arg_Internal => Internal,
6287 Arg_External => External,
6288 Arg_Parameter_Types => Parameter_Types,
6289 Arg_Result_Type => Result_Type,
6290 Arg_Mechanism => Mechanism,
6291 Arg_Result_Mechanism => Result_Mechanism,
6292 Arg_First_Optional_Parameter => First_Optional_Parameter);
6293 end Import_Function;
6299 -- pragma Import_Object (
6300 -- [Internal =>] LOCAL_NAME,
6301 -- [, [External =>] EXTERNAL_SYMBOL]
6302 -- [, [Size =>] EXTERNAL_SYMBOL]);
6304 -- EXTERNAL_SYMBOL ::=
6306 -- | static_string_EXPRESSION
6308 when Pragma_Import_Object => Import_Object : declare
6309 Args : Args_List (1 .. 3);
6310 Names : constant Name_List (1 .. 3) := (
6315 Internal : Node_Id renames Args (1);
6316 External : Node_Id renames Args (2);
6317 Size : Node_Id renames Args (3);
6321 Gather_Associations (Names, Args);
6322 Process_Extended_Import_Export_Object_Pragma (
6323 Arg_Internal => Internal,
6324 Arg_External => External,
6328 ----------------------
6329 -- Import_Procedure --
6330 ----------------------
6332 -- pragma Import_Procedure (
6333 -- [Internal =>] LOCAL_NAME,
6334 -- [, [External =>] EXTERNAL_SYMBOL]
6335 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6336 -- [, [Mechanism =>] MECHANISM]
6337 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6339 -- EXTERNAL_SYMBOL ::=
6341 -- | static_string_EXPRESSION
6343 -- PARAMETER_TYPES ::=
6345 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6347 -- TYPE_DESIGNATOR ::=
6349 -- | subtype_Name ' Access
6353 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6355 -- MECHANISM_ASSOCIATION ::=
6356 -- [formal_parameter_NAME =>] MECHANISM_NAME
6358 -- MECHANISM_NAME ::=
6361 -- | Descriptor [([Class =>] CLASS_NAME)]
6363 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6365 when Pragma_Import_Procedure => Import_Procedure : declare
6366 Args : Args_List (1 .. 5);
6367 Names : constant Name_List (1 .. 5) := (
6370 Name_Parameter_Types,
6372 Name_First_Optional_Parameter);
6374 Internal : Node_Id renames Args (1);
6375 External : Node_Id renames Args (2);
6376 Parameter_Types : Node_Id renames Args (3);
6377 Mechanism : Node_Id renames Args (4);
6378 First_Optional_Parameter : Node_Id renames Args (5);
6382 Gather_Associations (Names, Args);
6383 Process_Extended_Import_Export_Subprogram_Pragma (
6384 Arg_Internal => Internal,
6385 Arg_External => External,
6386 Arg_Parameter_Types => Parameter_Types,
6387 Arg_Mechanism => Mechanism,
6388 Arg_First_Optional_Parameter => First_Optional_Parameter);
6389 end Import_Procedure;
6391 -----------------------------
6392 -- Import_Valued_Procedure --
6393 -----------------------------
6395 -- pragma Import_Valued_Procedure (
6396 -- [Internal =>] LOCAL_NAME,
6397 -- [, [External =>] EXTERNAL_SYMBOL]
6398 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6399 -- [, [Mechanism =>] MECHANISM]
6400 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6402 -- EXTERNAL_SYMBOL ::=
6404 -- | static_string_EXPRESSION
6406 -- PARAMETER_TYPES ::=
6408 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6410 -- TYPE_DESIGNATOR ::=
6412 -- | subtype_Name ' Access
6416 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6418 -- MECHANISM_ASSOCIATION ::=
6419 -- [formal_parameter_NAME =>] MECHANISM_NAME
6421 -- MECHANISM_NAME ::=
6424 -- | Descriptor [([Class =>] CLASS_NAME)]
6426 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6428 when Pragma_Import_Valued_Procedure =>
6429 Import_Valued_Procedure : declare
6430 Args : Args_List (1 .. 5);
6431 Names : constant Name_List (1 .. 5) := (
6434 Name_Parameter_Types,
6436 Name_First_Optional_Parameter);
6438 Internal : Node_Id renames Args (1);
6439 External : Node_Id renames Args (2);
6440 Parameter_Types : Node_Id renames Args (3);
6441 Mechanism : Node_Id renames Args (4);
6442 First_Optional_Parameter : Node_Id renames Args (5);
6446 Gather_Associations (Names, Args);
6447 Process_Extended_Import_Export_Subprogram_Pragma (
6448 Arg_Internal => Internal,
6449 Arg_External => External,
6450 Arg_Parameter_Types => Parameter_Types,
6451 Arg_Mechanism => Mechanism,
6452 Arg_First_Optional_Parameter => First_Optional_Parameter);
6453 end Import_Valued_Procedure;
6455 ------------------------
6456 -- Initialize_Scalars --
6457 ------------------------
6459 -- pragma Initialize_Scalars;
6461 when Pragma_Initialize_Scalars =>
6463 Check_Arg_Count (0);
6464 Check_Valid_Configuration_Pragma;
6465 Check_Restriction (No_Initialize_Scalars, N);
6467 if not Restriction_Active (No_Initialize_Scalars) then
6468 Init_Or_Norm_Scalars := True;
6469 Initialize_Scalars := True;
6476 -- pragma Inline ( NAME {, NAME} );
6478 when Pragma_Inline =>
6480 -- Pragma is active if inlining option is active
6482 if Inline_Active then
6483 Process_Inline (True);
6485 -- Pragma is active in a predefined file in config run time mode
6487 elsif Configurable_Run_Time_Mode
6489 Is_Predefined_File_Name (Unit_File_Name (Current_Sem_Unit))
6491 Process_Inline (True);
6493 -- Otherwise inlining is not active
6496 Process_Inline (False);
6503 -- pragma Inline_Always ( NAME {, NAME} );
6505 when Pragma_Inline_Always =>
6506 Process_Inline (True);
6508 --------------------
6509 -- Inline_Generic --
6510 --------------------
6512 -- pragma Inline_Generic (NAME {, NAME});
6514 when Pragma_Inline_Generic =>
6515 Process_Generic_List;
6517 ----------------------
6518 -- Inspection_Point --
6519 ----------------------
6521 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
6523 when Pragma_Inspection_Point => Inspection_Point : declare
6528 if Arg_Count > 0 then
6531 Exp := Expression (Arg);
6534 if not Is_Entity_Name (Exp)
6535 or else not Is_Object (Entity (Exp))
6537 Error_Pragma_Arg ("object name required", Arg);
6544 end Inspection_Point;
6550 -- pragma Interface (
6551 -- convention_IDENTIFIER,
6554 when Pragma_Interface =>
6556 Check_Arg_Count (2);
6557 Check_No_Identifiers;
6558 Process_Import_Or_Interface;
6560 --------------------
6561 -- Interface_Name --
6562 --------------------
6564 -- pragma Interface_Name (
6565 -- [ Entity =>] local_NAME
6566 -- [,[External_Name =>] static_string_EXPRESSION ]
6567 -- [,[Link_Name =>] static_string_EXPRESSION ]);
6569 when Pragma_Interface_Name => Interface_Name : declare
6577 Check_At_Least_N_Arguments (2);
6578 Check_At_Most_N_Arguments (3);
6579 Id := Expression (Arg1);
6582 if not Is_Entity_Name (Id) then
6584 ("first argument for pragma% must be entity name", Arg1);
6585 elsif Etype (Id) = Any_Type then
6588 Def_Id := Entity (Id);
6591 -- Special DEC-compatible processing for the object case,
6592 -- forces object to be imported.
6594 if Ekind (Def_Id) = E_Variable then
6595 Kill_Size_Check_Code (Def_Id);
6596 Note_Possible_Modification (Id);
6598 -- Initialization is not allowed for imported variable
6600 if Present (Expression (Parent (Def_Id)))
6601 and then Comes_From_Source (Expression (Parent (Def_Id)))
6603 Error_Msg_Sloc := Sloc (Def_Id);
6605 ("no initialization allowed for declaration of& #",
6609 -- For compatibility, support VADS usage of providing both
6610 -- pragmas Interface and Interface_Name to obtain the effect
6611 -- of a single Import pragma.
6613 if Is_Imported (Def_Id)
6614 and then Present (First_Rep_Item (Def_Id))
6615 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
6616 and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
6620 Set_Imported (Def_Id);
6623 Set_Is_Public (Def_Id);
6624 Process_Interface_Name (Def_Id, Arg2, Arg3);
6627 -- Otherwise must be subprogram
6629 elsif not Is_Subprogram (Def_Id) then
6631 ("argument of pragma% is not subprogram", Arg1);
6634 Check_At_Most_N_Arguments (3);
6638 -- Loop through homonyms
6641 Def_Id := Get_Base_Subprogram (Hom_Id);
6643 if Is_Imported (Def_Id) then
6644 Process_Interface_Name (Def_Id, Arg2, Arg3);
6648 Hom_Id := Homonym (Hom_Id);
6650 exit when No (Hom_Id)
6651 or else Scope (Hom_Id) /= Current_Scope;
6656 ("argument of pragma% is not imported subprogram",
6662 -----------------------
6663 -- Interrupt_Handler --
6664 -----------------------
6666 -- pragma Interrupt_Handler (handler_NAME);
6668 when Pragma_Interrupt_Handler =>
6669 Check_Ada_83_Warning;
6670 Check_Arg_Count (1);
6671 Check_No_Identifiers;
6673 if No_Run_Time_Mode then
6674 Error_Msg_CRT ("Interrupt_Handler pragma", N);
6676 Check_Interrupt_Or_Attach_Handler;
6677 Process_Interrupt_Or_Attach_Handler;
6680 ------------------------
6681 -- Interrupt_Priority --
6682 ------------------------
6684 -- pragma Interrupt_Priority [(EXPRESSION)];
6686 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
6687 P : constant Node_Id := Parent (N);
6691 Check_Ada_83_Warning;
6693 if Arg_Count /= 0 then
6694 Arg := Expression (Arg1);
6695 Check_Arg_Count (1);
6696 Check_No_Identifiers;
6698 -- The expression must be analyzed in the special manner
6699 -- described in "Handling of Default and Per-Object
6700 -- Expressions" in sem.ads.
6702 Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
6705 if Nkind (P) /= N_Task_Definition
6706 and then Nkind (P) /= N_Protected_Definition
6711 elsif Has_Priority_Pragma (P) then
6712 Error_Pragma ("duplicate pragma% not allowed");
6715 Set_Has_Priority_Pragma (P, True);
6716 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
6718 end Interrupt_Priority;
6720 ---------------------
6721 -- Interrupt_State --
6722 ---------------------
6724 -- pragma Interrupt_State (
6725 -- [Name =>] INTERRUPT_ID,
6726 -- [State =>] INTERRUPT_STATE);
6728 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
6729 -- INTERRUPT_STATE => System | Runtime | User
6731 -- Note: if the interrupt id is given as an identifier, then
6732 -- it must be one of the identifiers in Ada.Interrupts.Names.
6733 -- Otherwise it is given as a static integer expression which
6734 -- must be in the range of Ada.Interrupts.Interrupt_ID.
6736 when Pragma_Interrupt_State => Interrupt_State : declare
6738 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
6739 -- This is the entity Ada.Interrupts.Interrupt_ID;
6741 State_Type : Character;
6742 -- Set to 's'/'r'/'u' for System/Runtime/User
6745 -- Index to entry in Interrupt_States table
6748 -- Value of interrupt
6750 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
6751 -- The first argument to the pragma
6753 Int_Ent : Entity_Id;
6754 -- Interrupt entity in Ada.Interrupts.Names
6758 Check_Arg_Count (2);
6760 Check_Optional_Identifier (Arg1, Name_Name);
6761 Check_Optional_Identifier (Arg2, "state");
6762 Check_Arg_Is_Identifier (Arg2);
6764 -- First argument is identifier
6766 if Nkind (Arg1X) = N_Identifier then
6768 -- Search list of names in Ada.Interrupts.Names
6770 Int_Ent := First_Entity (RTE (RE_Names));
6772 if No (Int_Ent) then
6773 Error_Pragma_Arg ("invalid interrupt name", Arg1);
6775 elsif Chars (Int_Ent) = Chars (Arg1X) then
6776 Int_Val := Expr_Value (Constant_Value (Int_Ent));
6780 Next_Entity (Int_Ent);
6783 -- First argument is not an identifier, so it must be a
6784 -- static expression of type Ada.Interrupts.Interrupt_ID.
6787 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6788 Int_Val := Expr_Value (Arg1X);
6790 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
6792 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
6795 ("value not in range of type " &
6796 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
6802 case Chars (Get_Pragma_Arg (Arg2)) is
6803 when Name_Runtime => State_Type := 'r';
6804 when Name_System => State_Type := 's';
6805 when Name_User => State_Type := 'u';
6808 Error_Pragma_Arg ("invalid interrupt state", Arg2);
6811 -- Check if entry is already stored
6813 IST_Num := Interrupt_States.First;
6815 -- If entry not found, add it
6817 if IST_Num > Interrupt_States.Last then
6818 Interrupt_States.Append
6819 ((Interrupt_Number => UI_To_Int (Int_Val),
6820 Interrupt_State => State_Type,
6821 Pragma_Loc => Loc));
6824 -- Case of entry for the same entry
6826 elsif Int_Val = Interrupt_States.Table (IST_Num).
6829 -- If state matches, done, no need to make redundant entry
6832 State_Type = Interrupt_States.Table (IST_Num).
6835 -- Otherwise if state does not match, error
6838 Interrupt_States.Table (IST_Num).Pragma_Loc;
6840 ("state conflicts with that given at #", Arg2);
6844 IST_Num := IST_Num + 1;
6846 end Interrupt_State;
6848 ----------------------
6849 -- Java_Constructor --
6850 ----------------------
6852 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
6854 when Pragma_Java_Constructor => Java_Constructor : declare
6861 Check_Arg_Count (1);
6862 Check_Optional_Identifier (Arg1, Name_Entity);
6863 Check_Arg_Is_Local_Name (Arg1);
6865 Id := Expression (Arg1);
6866 Find_Program_Unit_Name (Id);
6868 -- If we did not find the name, we are done
6870 if Etype (Id) = Any_Type then
6874 Hom_Id := Entity (Id);
6876 -- Loop through homonyms
6879 Def_Id := Get_Base_Subprogram (Hom_Id);
6881 -- The constructor is required to be a function returning
6882 -- an access type whose designated type has convention Java.
6884 if Ekind (Def_Id) = E_Function
6885 and then Ekind (Etype (Def_Id)) in Access_Kind
6888 (Designated_Type (Etype (Def_Id))) = Convention_Java
6891 (Root_Type (Designated_Type (Etype (Def_Id))))
6894 Set_Is_Constructor (Def_Id);
6895 Set_Convention (Def_Id, Convention_Java);
6899 ("pragma% requires function returning a 'Java access type",
6903 Hom_Id := Homonym (Hom_Id);
6905 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
6907 end Java_Constructor;
6909 ----------------------
6910 -- Java_Interface --
6911 ----------------------
6913 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
6915 when Pragma_Java_Interface => Java_Interface : declare
6921 Check_Arg_Count (1);
6922 Check_Optional_Identifier (Arg1, Name_Entity);
6923 Check_Arg_Is_Local_Name (Arg1);
6925 Arg := Expression (Arg1);
6928 if Etype (Arg) = Any_Type then
6932 if not Is_Entity_Name (Arg)
6933 or else not Is_Type (Entity (Arg))
6935 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6938 Typ := Underlying_Type (Entity (Arg));
6940 -- For now we simply check some of the semantic constraints
6941 -- on the type. This currently leaves out some restrictions
6942 -- on interface types, namely that the parent type must be
6943 -- java.lang.Object.Typ and that all primitives of the type
6944 -- should be declared abstract. ???
6946 if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
6947 Error_Pragma_Arg ("pragma% requires an abstract "
6948 & "tagged type", Arg1);
6950 elsif not Has_Discriminants (Typ)
6951 or else Ekind (Etype (First_Discriminant (Typ)))
6952 /= E_Anonymous_Access_Type
6954 not Is_Class_Wide_Type
6955 (Designated_Type (Etype (First_Discriminant (Typ))))
6958 ("type must have a class-wide access discriminant", Arg1);
6966 -- pragma Keep_Names ([On => ] local_NAME);
6968 when Pragma_Keep_Names => Keep_Names : declare
6973 Check_Arg_Count (1);
6974 Check_Optional_Identifier (Arg1, Name_On);
6975 Check_Arg_Is_Local_Name (Arg1);
6977 Arg := Expression (Arg1);
6980 if Etype (Arg) = Any_Type then
6984 if not Is_Entity_Name (Arg)
6985 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
6988 ("pragma% requires a local enumeration type", Arg1);
6991 Set_Discard_Names (Entity (Arg), False);
6998 -- pragma License (RESTRICTED | UNRESRICTED | GPL | MODIFIED_GPL);
7000 when Pragma_License =>
7002 Check_Arg_Count (1);
7003 Check_No_Identifiers;
7004 Check_Valid_Configuration_Pragma;
7005 Check_Arg_Is_Identifier (Arg1);
7008 Sind : constant Source_File_Index :=
7009 Source_Index (Current_Sem_Unit);
7012 case Chars (Get_Pragma_Arg (Arg1)) is
7014 Set_License (Sind, GPL);
7016 when Name_Modified_GPL =>
7017 Set_License (Sind, Modified_GPL);
7019 when Name_Restricted =>
7020 Set_License (Sind, Restricted);
7022 when Name_Unrestricted =>
7023 Set_License (Sind, Unrestricted);
7026 Error_Pragma_Arg ("invalid license name", Arg1);
7034 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
7036 when Pragma_Link_With => Link_With : declare
7042 if Operating_Mode = Generate_Code
7043 and then In_Extended_Main_Source_Unit (N)
7045 Check_At_Least_N_Arguments (1);
7046 Check_No_Identifiers;
7047 Check_Is_In_Decl_Part_Or_Package_Spec;
7048 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7052 while Present (Arg) loop
7053 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7055 -- Store argument, converting sequences of spaces
7056 -- to a single null character (this is one of the
7057 -- differences in processing between Link_With
7058 -- and Linker_Options).
7061 C : constant Char_Code := Get_Char_Code (' ');
7062 S : constant String_Id :=
7063 Strval (Expr_Value_S (Expression (Arg)));
7064 L : constant Nat := String_Length (S);
7067 procedure Skip_Spaces;
7068 -- Advance F past any spaces
7070 procedure Skip_Spaces is
7072 while F <= L and then Get_String_Char (S, F) = C loop
7078 Skip_Spaces; -- skip leading spaces
7080 -- Loop through characters, changing any embedded
7081 -- sequence of spaces to a single null character
7082 -- (this is how Link_With/Linker_Options differ)
7085 if Get_String_Char (S, F) = C then
7088 Store_String_Char (ASCII.NUL);
7091 Store_String_Char (Get_String_Char (S, F));
7099 if Present (Arg) then
7100 Store_String_Char (ASCII.NUL);
7104 Store_Linker_Option_String (End_String);
7112 -- pragma Linker_Alias (
7113 -- [Entity =>] LOCAL_NAME
7114 -- [Alias =>] static_string_EXPRESSION);
7116 when Pragma_Linker_Alias =>
7118 Check_Arg_Count (2);
7119 Check_Optional_Identifier (Arg1, Name_Entity);
7120 Check_Optional_Identifier (Arg2, "alias");
7121 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7122 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7124 -- The only processing required is to link this item on to the
7125 -- list of rep items for the given entity. This is accomplished
7126 -- by the call to Rep_Item_Too_Late (when no error is detected
7127 -- and False is returned).
7129 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7132 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7135 --------------------
7136 -- Linker_Options --
7137 --------------------
7139 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
7141 when Pragma_Linker_Options => Linker_Options : declare
7145 Check_Ada_83_Warning;
7146 Check_No_Identifiers;
7147 Check_Arg_Count (1);
7148 Check_Is_In_Decl_Part_Or_Package_Spec;
7150 if Operating_Mode = Generate_Code
7151 and then In_Extended_Main_Source_Unit (N)
7153 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7154 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
7157 while Present (Arg) loop
7158 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7159 Store_String_Char (ASCII.NUL);
7161 (Strval (Expr_Value_S (Expression (Arg))));
7165 Store_Linker_Option_String (End_String);
7169 --------------------
7170 -- Linker_Section --
7171 --------------------
7173 -- pragma Linker_Section (
7174 -- [Entity =>] LOCAL_NAME
7175 -- [Section =>] static_string_EXPRESSION);
7177 when Pragma_Linker_Section =>
7179 Check_Arg_Count (2);
7180 Check_Optional_Identifier (Arg1, Name_Entity);
7181 Check_Optional_Identifier (Arg2, Name_Section);
7182 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7183 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7185 -- The only processing required is to link this item on to the
7186 -- list of rep items for the given entity. This is accomplished
7187 -- by the call to Rep_Item_Too_Late (when no error is detected
7188 -- and False is returned).
7190 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7193 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7200 -- pragma List (On | Off)
7202 -- There is nothing to do here, since we did all the processing
7203 -- for this pragma in Par.Prag (so that it works properly even in
7204 -- syntax only mode)
7209 --------------------
7210 -- Locking_Policy --
7211 --------------------
7213 -- pragma Locking_Policy (policy_IDENTIFIER);
7215 when Pragma_Locking_Policy => declare
7219 Check_Ada_83_Warning;
7220 Check_Arg_Count (1);
7221 Check_No_Identifiers;
7222 Check_Arg_Is_Locking_Policy (Arg1);
7223 Check_Valid_Configuration_Pragma;
7224 Get_Name_String (Chars (Expression (Arg1)));
7225 LP := Fold_Upper (Name_Buffer (1));
7227 if Locking_Policy /= ' '
7228 and then Locking_Policy /= LP
7230 Error_Msg_Sloc := Locking_Policy_Sloc;
7231 Error_Pragma ("locking policy incompatible with policy#");
7233 -- Set new policy, but always preserve System_Location since
7234 -- we like the error message with the run time name.
7237 Locking_Policy := LP;
7239 if Locking_Policy_Sloc /= System_Location then
7240 Locking_Policy_Sloc := Loc;
7249 -- pragma Long_Float (D_Float | G_Float);
7251 when Pragma_Long_Float =>
7253 Check_Valid_Configuration_Pragma;
7254 Check_Arg_Count (1);
7255 Check_No_Identifier (Arg1);
7256 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
7258 if not OpenVMS_On_Target then
7259 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
7264 if Chars (Expression (Arg1)) = Name_D_Float then
7265 if Opt.Float_Format_Long = 'G' then
7266 Error_Pragma ("G_Float previously specified");
7269 Opt.Float_Format_Long := 'D';
7271 -- G_Float case (this is the default, does not need overriding)
7274 if Opt.Float_Format_Long = 'D' then
7275 Error_Pragma ("D_Float previously specified");
7278 Opt.Float_Format_Long := 'G';
7281 Set_Standard_Fpt_Formats;
7283 -----------------------
7284 -- Machine_Attribute --
7285 -----------------------
7287 -- pragma Machine_Attribute (
7288 -- [Entity =>] LOCAL_NAME,
7289 -- [Attribute_Name =>] static_string_EXPRESSION
7290 -- [,[Info =>] static_string_EXPRESSION] );
7292 when Pragma_Machine_Attribute => Machine_Attribute : declare
7298 if Arg_Count = 3 then
7299 Check_Optional_Identifier (Arg3, "info");
7300 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
7302 Check_Arg_Count (2);
7305 Check_Arg_Is_Local_Name (Arg1);
7306 Check_Optional_Identifier (Arg2, "attribute_name");
7307 Check_Optional_Identifier (Arg1, Name_Entity);
7308 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7309 Def_Id := Entity (Expression (Arg1));
7311 if Is_Access_Type (Def_Id) then
7312 Def_Id := Designated_Type (Def_Id);
7315 if Rep_Item_Too_Early (Def_Id, N) then
7319 Def_Id := Underlying_Type (Def_Id);
7321 -- The only processing required is to link this item on to the
7322 -- list of rep items for the given entity. This is accomplished
7323 -- by the call to Rep_Item_Too_Late (when no error is detected
7324 -- and False is returned).
7326 if Rep_Item_Too_Late (Def_Id, N) then
7329 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7331 end Machine_Attribute;
7337 -- pragma Main_Storage
7338 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7340 -- MAIN_STORAGE_OPTION ::=
7341 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7342 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7344 when Pragma_Main => Main : declare
7345 Args : Args_List (1 .. 3);
7346 Names : constant Name_List (1 .. 3) := (
7348 Name_Task_Stack_Size_Default,
7349 Name_Time_Slicing_Enabled);
7355 Gather_Associations (Names, Args);
7357 for J in 1 .. 2 loop
7358 if Present (Args (J)) then
7359 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7363 if Present (Args (3)) then
7364 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
7368 while Present (Nod) loop
7369 if Nkind (Nod) = N_Pragma
7370 and then Chars (Nod) = Name_Main
7372 Error_Msg_Name_1 := Chars (N);
7373 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7384 -- pragma Main_Storage
7385 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7387 -- MAIN_STORAGE_OPTION ::=
7388 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7389 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7391 when Pragma_Main_Storage => Main_Storage : declare
7392 Args : Args_List (1 .. 2);
7393 Names : constant Name_List (1 .. 2) := (
7394 Name_Working_Storage,
7401 Gather_Associations (Names, Args);
7403 for J in 1 .. 2 loop
7404 if Present (Args (J)) then
7405 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7409 Check_In_Main_Program;
7412 while Present (Nod) loop
7413 if Nkind (Nod) = N_Pragma
7414 and then Chars (Nod) = Name_Main_Storage
7416 Error_Msg_Name_1 := Chars (N);
7417 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7428 -- pragma Memory_Size (NUMERIC_LITERAL)
7430 when Pragma_Memory_Size =>
7433 -- Memory size is simply ignored
7435 Check_No_Identifiers;
7436 Check_Arg_Count (1);
7437 Check_Arg_Is_Integer_Literal (Arg1);
7443 -- pragma No_Return (procedure_LOCAL_NAME);
7445 when Pragma_No_Return => No_Return : declare
7452 Check_Arg_Count (1);
7453 Check_No_Identifiers;
7454 Check_Arg_Is_Local_Name (Arg1);
7455 Id := Expression (Arg1);
7458 if not Is_Entity_Name (Id) then
7459 Error_Pragma_Arg ("entity name required", Arg1);
7462 if Etype (Id) = Any_Type then
7470 and then Scope (E) = Current_Scope
7472 if Ekind (E) = E_Procedure
7473 or else Ekind (E) = E_Generic_Procedure
7483 Error_Pragma ("no procedures found for pragma%");
7491 -- pragma Obsolescent [(static_string_EXPRESSION)];
7493 when Pragma_Obsolescent => Obsolescent : declare
7496 Check_At_Most_N_Arguments (1);
7497 Check_No_Identifiers;
7499 if Arg_Count = 1 then
7500 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7504 or else (Nkind (Prev (N))) /= N_Subprogram_Declaration
7507 ("pragma% misplaced, must immediately " &
7508 "follow subprogram spec");
7516 -- pragma No_Run_Time
7518 -- Note: this pragma is retained for backwards compatibiltiy.
7519 -- See body of Rtsfind for full details on its handling.
7521 when Pragma_No_Run_Time =>
7523 Check_Valid_Configuration_Pragma;
7524 Check_Arg_Count (0);
7526 No_Run_Time_Mode := True;
7527 Configurable_Run_Time_Mode := True;
7530 Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
7533 Duration_32_Bits_On_Target := True;
7537 Set_Restriction (No_Finalization, N);
7538 Set_Restriction (No_Exception_Handlers, N);
7539 Set_Restriction (Max_Tasks, N, 0);
7540 Set_Restriction (No_Tasking, N);
7542 -----------------------
7543 -- Normalize_Scalars --
7544 -----------------------
7546 -- pragma Normalize_Scalars;
7548 when Pragma_Normalize_Scalars =>
7549 Check_Ada_83_Warning;
7550 Check_Arg_Count (0);
7551 Check_Valid_Configuration_Pragma;
7552 Normalize_Scalars := True;
7553 Init_Or_Norm_Scalars := True;
7559 -- pragma Optimize (Time | Space);
7561 -- The actual check for optimize is done in Gigi. Note that this
7562 -- pragma does not actually change the optimization setting, it
7563 -- simply checks that it is consistent with the pragma.
7565 when Pragma_Optimize =>
7566 Check_No_Identifiers;
7567 Check_Arg_Count (1);
7568 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
7570 -------------------------
7571 -- Optional_Overriding --
7572 -------------------------
7574 -- These pragmas are treated as part of the previous subprogram
7575 -- declaration, and analyzed immediately after it (see sem_ch6,
7576 -- Check_Overriding_Operation). If the pragma has not been analyzed
7577 -- yet, it appears in the wrong place.
7579 when Pragma_Optional_Overriding =>
7580 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7586 when Pragma_Overriding =>
7587 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7593 -- pragma Pack (first_subtype_LOCAL_NAME);
7595 when Pragma_Pack => Pack : declare
7596 Assoc : constant Node_Id := Arg1;
7601 Check_No_Identifiers;
7602 Check_Arg_Count (1);
7603 Check_Arg_Is_Local_Name (Arg1);
7605 Type_Id := Expression (Assoc);
7606 Find_Type (Type_Id);
7607 Typ := Entity (Type_Id);
7610 or else Rep_Item_Too_Early (Typ, N)
7614 Typ := Underlying_Type (Typ);
7617 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
7618 Error_Pragma ("pragma% must specify array or record type");
7621 Check_First_Subtype (Arg1);
7623 if Has_Pragma_Pack (Typ) then
7624 Error_Pragma ("duplicate pragma%, only one allowed");
7626 -- Array type. We set the Has_Pragma_Pack flag, and Is_Packed,
7627 -- but not Has_Non_Standard_Rep, because we don't actually know
7628 -- till freeze time if the array can have packed representation.
7629 -- That's because in the general case we do not know enough about
7630 -- the component type until it in turn is frozen, which certainly
7631 -- happens before the array type is frozen, but not necessarily
7632 -- till that point (i.e. right now it may be unfrozen).
7634 elsif Is_Array_Type (Typ) then
7635 if Has_Aliased_Components (Base_Type (Typ)) then
7637 ("pragma% ignored, cannot pack aliased components?");
7639 elsif Has_Atomic_Components (Typ)
7640 or else Is_Atomic (Component_Type (Typ))
7643 ("?pragma% ignored, cannot pack atomic components");
7645 elsif not Rep_Item_Too_Late (Typ, N) then
7646 Set_Is_Packed (Base_Type (Typ));
7647 Set_Has_Pragma_Pack (Base_Type (Typ));
7648 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7651 -- Record type. For record types, the pack is always effective
7653 else pragma Assert (Is_Record_Type (Typ));
7654 if not Rep_Item_Too_Late (Typ, N) then
7655 Set_Has_Pragma_Pack (Base_Type (Typ));
7656 Set_Is_Packed (Base_Type (Typ));
7657 Set_Has_Non_Standard_Rep (Base_Type (Typ));
7668 -- There is nothing to do here, since we did all the processing
7669 -- for this pragma in Par.Prag (so that it works properly even in
7670 -- syntax only mode)
7679 -- pragma Passive [(PASSIVE_FORM)];
7681 -- PASSIVE_FORM ::= Semaphore | No
7683 when Pragma_Passive =>
7686 if Nkind (Parent (N)) /= N_Task_Definition then
7687 Error_Pragma ("pragma% must be within task definition");
7690 if Arg_Count /= 0 then
7691 Check_Arg_Count (1);
7692 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
7699 -- pragma Polling (ON | OFF);
7701 when Pragma_Polling =>
7703 Check_Arg_Count (1);
7704 Check_No_Identifiers;
7705 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7706 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
7708 ---------------------
7709 -- Persistent_Data --
7710 ---------------------
7712 when Pragma_Persistent_Data => declare
7716 -- Register the pragma as applying to the compilation unit.
7717 -- Individual Persistent_Object pragmas for relevant objects
7718 -- are generated the end of the compilation.
7721 Check_Valid_Configuration_Pragma;
7722 Check_Arg_Count (0);
7723 Ent := Find_Lib_Unit_Name;
7724 Set_Is_Preelaborated (Ent);
7727 ------------------------
7728 -- Persistent_Object --
7729 ------------------------
7731 when Pragma_Persistent_Object => declare
7739 Check_Arg_Count (1);
7740 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7741 if not Is_Entity_Name (Expression (Arg1))
7743 (Ekind (Entity (Expression (Arg1))) /= E_Variable
7744 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
7746 Error_Pragma_Arg ("pragma only applies to objects", Arg1);
7749 Ent := Entity (Expression (Arg1));
7750 Decl := Parent (Ent);
7752 if Nkind (Decl) /= N_Object_Declaration then
7756 -- Placement of the object depends on whether there is
7757 -- an initial value or none. If the No_Initialization flag
7758 -- is set, the initialization has been transformed into
7759 -- assignments, which is disallowed elaboration code.
7761 if No_Initialization (Decl) then
7763 ("initialization for persistent object"
7764 & "must be static expression", Decl);
7768 if No (Expression (Decl)) then
7770 Store_String_Chars ("section ("".persistent.bss"")");
7774 if not Is_OK_Static_Expression (Expression (Decl)) then
7775 Flag_Non_Static_Expr
7776 ("initialization for persistent object"
7777 & "must be static expression!", Expression (Decl));
7782 Store_String_Chars ("section ("".persistent.data"")");
7789 Name_Machine_Attribute,
7791 (Make_Pragma_Argument_Association
7792 (Sloc => Sloc (Arg1),
7793 Expression => New_Occurrence_Of (Ent, Sloc (Ent))),
7794 Make_Pragma_Argument_Association
7795 (Sloc => Sloc (Arg1),
7798 (Sloc => Sloc (Arg1),
7801 Insert_After (N, MA);
7803 Set_Has_Gigi_Rep_Item (Ent);
7810 -- pragma Preelaborate [(library_unit_NAME)];
7812 -- Set the flag Is_Preelaborated of program unit name entity
7814 when Pragma_Preelaborate => Preelaborate : declare
7815 Pa : constant Node_Id := Parent (N);
7816 Pk : constant Node_Kind := Nkind (Pa);
7820 Check_Ada_83_Warning;
7821 Check_Valid_Library_Unit_Pragma;
7823 if Nkind (N) = N_Null_Statement then
7827 Ent := Find_Lib_Unit_Name;
7829 -- This filters out pragmas inside generic parent then
7830 -- show up inside instantiation
7833 and then not (Pk = N_Package_Specification
7834 and then Present (Generic_Parent (Pa)))
7836 if not Debug_Flag_U then
7837 Set_Is_Preelaborated (Ent);
7838 Set_Suppress_Elaboration_Warnings (Ent);
7847 -- pragma Priority (EXPRESSION);
7849 when Pragma_Priority => Priority : declare
7850 P : constant Node_Id := Parent (N);
7854 Check_No_Identifiers;
7855 Check_Arg_Count (1);
7859 if Nkind (P) = N_Subprogram_Body then
7860 Check_In_Main_Program;
7862 Arg := Expression (Arg1);
7863 Analyze_And_Resolve (Arg, Standard_Integer);
7867 if not Is_Static_Expression (Arg) then
7868 Flag_Non_Static_Expr
7869 ("main subprogram priority is not static!", Arg);
7872 -- If constraint error, then we already signalled an error
7874 elsif Raises_Constraint_Error (Arg) then
7877 -- Otherwise check in range
7881 Val : constant Uint := Expr_Value (Arg);
7885 or else Val > Expr_Value (Expression
7886 (Parent (RTE (RE_Max_Priority))))
7889 ("main subprogram priority is out of range", Arg1);
7895 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
7897 -- Task or Protected, must be of type Integer
7899 elsif Nkind (P) = N_Protected_Definition
7901 Nkind (P) = N_Task_Definition
7903 Arg := Expression (Arg1);
7905 -- The expression must be analyzed in the special manner
7906 -- described in "Handling of Default and Per-Object
7907 -- Expressions" in sem.ads.
7909 Analyze_Per_Use_Expression (Arg, Standard_Integer);
7911 if not Is_Static_Expression (Arg) then
7912 Check_Restriction (Static_Priorities, Arg);
7915 -- Anything else is incorrect
7921 if Has_Priority_Pragma (P) then
7922 Error_Pragma ("duplicate pragma% not allowed");
7924 Set_Has_Priority_Pragma (P, True);
7926 if Nkind (P) = N_Protected_Definition
7928 Nkind (P) = N_Task_Definition
7930 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7931 -- exp_ch9 should use this ???
7936 --------------------------
7937 -- Propagate_Exceptions --
7938 --------------------------
7940 -- pragma Propagate_Exceptions;
7942 when Pragma_Propagate_Exceptions =>
7944 Check_Arg_Count (0);
7946 if In_Extended_Main_Source_Unit (N) then
7947 Propagate_Exceptions := True;
7954 -- pragma Psect_Object (
7955 -- [Internal =>] LOCAL_NAME,
7956 -- [, [External =>] EXTERNAL_SYMBOL]
7957 -- [, [Size =>] EXTERNAL_SYMBOL]);
7959 when Pragma_Psect_Object | Pragma_Common_Object =>
7960 Psect_Object : declare
7961 Args : Args_List (1 .. 3);
7962 Names : constant Name_List (1 .. 3) := (
7967 Internal : Node_Id renames Args (1);
7968 External : Node_Id renames Args (2);
7969 Size : Node_Id renames Args (3);
7971 R_Internal : Node_Id;
7972 R_External : Node_Id;
7979 procedure Check_Too_Long (Arg : Node_Id);
7980 -- Posts message if the argument is an identifier with more
7981 -- than 31 characters, or a string literal with more than
7982 -- 31 characters, and we are operating under VMS
7984 --------------------
7985 -- Check_Too_Long --
7986 --------------------
7988 procedure Check_Too_Long (Arg : Node_Id) is
7989 X : constant Node_Id := Original_Node (Arg);
7992 if Nkind (X) /= N_String_Literal
7994 Nkind (X) /= N_Identifier
7997 ("inappropriate argument for pragma %", Arg);
8000 if OpenVMS_On_Target then
8001 if (Nkind (X) = N_String_Literal
8002 and then String_Length (Strval (X)) > 31)
8004 (Nkind (X) = N_Identifier
8005 and then Length_Of_Name (Chars (X)) > 31)
8008 ("argument for pragma % is longer than 31 characters",
8014 -- Start of processing for Common_Object/Psect_Object
8018 Gather_Associations (Names, Args);
8019 Process_Extended_Import_Export_Internal_Arg (Internal);
8021 R_Internal := Relocate_Node (Internal);
8023 Def_Id := Entity (R_Internal);
8025 if Ekind (Def_Id) /= E_Constant
8026 and then Ekind (Def_Id) /= E_Variable
8029 ("pragma% must designate an object", Internal);
8032 Check_Too_Long (R_Internal);
8034 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
8036 ("cannot use pragma% for imported/exported object",
8040 if Is_Concurrent_Type (Etype (R_Internal)) then
8042 ("cannot specify pragma % for task/protected object",
8046 if Is_Psected (Def_Id) then
8047 Error_Msg_N ("?duplicate Psect_Object pragma", N);
8049 Set_Is_Psected (Def_Id);
8052 if Ekind (Def_Id) = E_Constant then
8054 ("cannot specify pragma % for a constant", R_Internal);
8057 if Is_Record_Type (Etype (R_Internal)) then
8063 Ent := First_Entity (Etype (R_Internal));
8064 while Present (Ent) loop
8065 Decl := Declaration_Node (Ent);
8067 if Ekind (Ent) = E_Component
8068 and then Nkind (Decl) = N_Component_Declaration
8069 and then Present (Expression (Decl))
8070 and then Warn_On_Export_Import
8073 ("?object for pragma % has defaults", R_Internal);
8083 if Present (Size) then
8084 Check_Too_Long (Size);
8087 -- Make Psect case-insensitive.
8089 if Present (External) then
8090 Check_Too_Long (External);
8092 if Nkind (External) = N_String_Literal then
8093 String_To_Name_Buffer (Strval (External));
8095 Get_Name_String (Chars (External));
8100 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8102 R_External := Make_String_Literal
8103 (Sloc => Sloc (External), Strval => Str);
8105 Get_Name_String (Chars (Internal));
8108 Store_String_Chars (Name_Buffer (1 .. Name_Len));
8110 R_External := Make_String_Literal
8111 (Sloc => Sloc (Internal), Strval => Str);
8114 -- Transform into pragma Linker_Section, add attributes to
8115 -- match what DEC Ada does. Ignore size for now?
8120 Name_Linker_Section,
8122 (Make_Pragma_Argument_Association
8123 (Sloc => Sloc (R_Internal),
8124 Expression => R_Internal),
8125 Make_Pragma_Argument_Association
8126 (Sloc => Sloc (R_External),
8127 Expression => R_External))));
8131 -- Add Machine_Attribute of "overlaid", so the section overlays
8132 -- other sections of the same name.
8135 Store_String_Chars ("overlaid");
8141 Name_Machine_Attribute,
8143 (Make_Pragma_Argument_Association
8144 (Sloc => Sloc (R_Internal),
8145 Expression => R_Internal),
8146 Make_Pragma_Argument_Association
8147 (Sloc => Sloc (R_External),
8150 (Sloc => Sloc (R_External),
8154 -- Add Machine_Attribute of "global", so the section is visible
8158 Store_String_Chars ("global");
8164 Name_Machine_Attribute,
8166 (Make_Pragma_Argument_Association
8167 (Sloc => Sloc (R_Internal),
8168 Expression => R_Internal),
8170 Make_Pragma_Argument_Association
8171 (Sloc => Sloc (R_External),
8174 (Sloc => Sloc (R_External),
8178 -- Add Machine_Attribute of "initialize", so the section is
8182 Store_String_Chars ("initialize");
8188 Name_Machine_Attribute,
8190 (Make_Pragma_Argument_Association
8191 (Sloc => Sloc (R_Internal),
8192 Expression => R_Internal),
8194 Make_Pragma_Argument_Association
8195 (Sloc => Sloc (R_External),
8198 (Sloc => Sloc (R_External),
8207 -- pragma Pure [(library_unit_NAME)];
8209 when Pragma_Pure => Pure : declare
8212 Check_Ada_83_Warning;
8213 Check_Valid_Library_Unit_Pragma;
8215 if Nkind (N) = N_Null_Statement then
8219 Ent := Find_Lib_Unit_Name;
8221 Set_Suppress_Elaboration_Warnings (Ent);
8228 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
8230 when Pragma_Pure_Function => Pure_Function : declare
8234 Effective : Boolean := False;
8238 Check_Arg_Count (1);
8239 Check_Optional_Identifier (Arg1, Name_Entity);
8240 Check_Arg_Is_Local_Name (Arg1);
8241 E_Id := Expression (Arg1);
8243 if Error_Posted (E_Id) then
8247 -- Loop through homonyms (overloadings) of referenced entity
8253 Def_Id := Get_Base_Subprogram (E);
8255 if Ekind (Def_Id) /= E_Function
8256 and then Ekind (Def_Id) /= E_Generic_Function
8257 and then Ekind (Def_Id) /= E_Operator
8260 ("pragma% requires a function name", Arg1);
8263 Set_Is_Pure (Def_Id);
8265 if not Has_Pragma_Pure_Function (Def_Id) then
8266 Set_Has_Pragma_Pure_Function (Def_Id);
8271 exit when No (E) or else Scope (E) /= Current_Scope;
8275 and then Warn_On_Redundant_Constructs
8277 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
8283 --------------------
8284 -- Queuing_Policy --
8285 --------------------
8287 -- pragma Queuing_Policy (policy_IDENTIFIER);
8289 when Pragma_Queuing_Policy => declare
8293 Check_Ada_83_Warning;
8294 Check_Arg_Count (1);
8295 Check_No_Identifiers;
8296 Check_Arg_Is_Queuing_Policy (Arg1);
8297 Check_Valid_Configuration_Pragma;
8298 Get_Name_String (Chars (Expression (Arg1)));
8299 QP := Fold_Upper (Name_Buffer (1));
8301 if Queuing_Policy /= ' '
8302 and then Queuing_Policy /= QP
8304 Error_Msg_Sloc := Queuing_Policy_Sloc;
8305 Error_Pragma ("queuing policy incompatible with policy#");
8307 -- Set new policy, but always preserve System_Location since
8308 -- we like the error message with the run time name.
8311 Queuing_Policy := QP;
8313 if Queuing_Policy_Sloc /= System_Location then
8314 Queuing_Policy_Sloc := Loc;
8319 ---------------------------
8320 -- Remote_Call_Interface --
8321 ---------------------------
8323 -- pragma Remote_Call_Interface [(library_unit_NAME)];
8325 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
8326 Cunit_Node : Node_Id;
8327 Cunit_Ent : Entity_Id;
8331 Check_Ada_83_Warning;
8332 Check_Valid_Library_Unit_Pragma;
8334 if Nkind (N) = N_Null_Statement then
8338 Cunit_Node := Cunit (Current_Sem_Unit);
8339 K := Nkind (Unit (Cunit_Node));
8340 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8342 if K = N_Package_Declaration
8343 or else K = N_Generic_Package_Declaration
8344 or else K = N_Subprogram_Declaration
8345 or else K = N_Generic_Subprogram_Declaration
8346 or else (K = N_Subprogram_Body
8347 and then Acts_As_Spec (Unit (Cunit_Node)))
8352 "pragma% must apply to package or subprogram declaration");
8355 Set_Is_Remote_Call_Interface (Cunit_Ent);
8356 end Remote_Call_Interface;
8362 -- pragma Remote_Types [(library_unit_NAME)];
8364 when Pragma_Remote_Types => Remote_Types : declare
8365 Cunit_Node : Node_Id;
8366 Cunit_Ent : Entity_Id;
8369 Check_Ada_83_Warning;
8370 Check_Valid_Library_Unit_Pragma;
8372 if Nkind (N) = N_Null_Statement then
8376 Cunit_Node := Cunit (Current_Sem_Unit);
8377 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8379 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8381 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8384 "pragma% can only apply to a package declaration");
8387 Set_Is_Remote_Types (Cunit_Ent);
8394 -- pragma Ravenscar;
8396 when Pragma_Ravenscar =>
8398 Check_Arg_Count (0);
8399 Check_Valid_Configuration_Pragma;
8402 -------------------------
8403 -- Restricted_Run_Time --
8404 -------------------------
8406 -- pragma Restricted_Run_Time;
8408 when Pragma_Restricted_Run_Time =>
8410 Check_Arg_Count (0);
8411 Check_Valid_Configuration_Pragma;
8412 Set_Restricted_Profile (N);
8418 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
8421 -- restriction_IDENTIFIER
8422 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8424 when Pragma_Restrictions =>
8425 Process_Restrictions_Or_Restriction_Warnings;
8427 --------------------------
8428 -- Restriction_Warnings --
8429 --------------------------
8431 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
8434 -- restriction_IDENTIFIER
8435 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8437 when Pragma_Restriction_Warnings =>
8438 Process_Restrictions_Or_Restriction_Warnings;
8444 -- pragma Reviewable;
8446 when Pragma_Reviewable =>
8447 Check_Ada_83_Warning;
8448 Check_Arg_Count (0);
8454 -- pragma Share_Generic (NAME {, NAME});
8456 when Pragma_Share_Generic =>
8458 Process_Generic_List;
8464 -- pragma Shared (LOCAL_NAME);
8466 when Pragma_Shared =>
8468 Process_Atomic_Shared_Volatile;
8470 --------------------
8471 -- Shared_Passive --
8472 --------------------
8474 -- pragma Shared_Passive [(library_unit_NAME)];
8476 -- Set the flag Is_Shared_Passive of program unit name entity
8478 when Pragma_Shared_Passive => Shared_Passive : declare
8479 Cunit_Node : Node_Id;
8480 Cunit_Ent : Entity_Id;
8483 Check_Ada_83_Warning;
8484 Check_Valid_Library_Unit_Pragma;
8486 if Nkind (N) = N_Null_Statement then
8490 Cunit_Node := Cunit (Current_Sem_Unit);
8491 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8493 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8495 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8498 "pragma% can only apply to a package declaration");
8501 Set_Is_Shared_Passive (Cunit_Ent);
8504 ----------------------
8505 -- Source_File_Name --
8506 ----------------------
8508 -- pragma Source_File_Name (
8509 -- [UNIT_NAME =>] unit_NAME,
8510 -- [BODY_FILE_NAME | SPEC_FILE_NAME] => STRING_LITERAL);
8512 -- No processing here. Processing was completed during parsing,
8513 -- since we need to have file names set as early as possible.
8514 -- Units are loaded well before semantic processing starts.
8516 -- The only processing we defer to this point is the check
8517 -- for correct placement.
8519 when Pragma_Source_File_Name =>
8521 Check_Valid_Configuration_Pragma;
8523 ------------------------------
8524 -- Source_File_Name_Project --
8525 ------------------------------
8527 -- pragma Source_File_Name_Project (
8528 -- [UNIT_NAME =>] unit_NAME,
8529 -- [BODY_FILE_NAME | SPEC_FILE_NAME] => STRING_LITERAL);
8531 -- No processing here. Processing was completed during parsing,
8532 -- since we need to have file names set as early as possible.
8533 -- Units are loaded well before semantic processing starts.
8535 -- The only processing we defer to this point is the check
8536 -- for correct placement.
8538 when Pragma_Source_File_Name_Project =>
8540 Check_Valid_Configuration_Pragma;
8542 -- Check that a pragma Source_File_Name_Project is used only
8543 -- in a configuration pragmas file.
8544 -- Pragmas Source_File_Name_Project should only be generated
8545 -- by the Project Manager in configuration pragmas files.
8547 -- This is really an ugly test. It seems to depend on some
8548 -- accidental and undocumented property. At the very least
8549 -- it needs to be documented, but it would be better to have
8550 -- a clean way of testing if we are in a configuration file???
8552 if Present (Parent (N)) then
8554 ("pragma% can only appear in a configuration pragmas file");
8557 ----------------------
8558 -- Source_Reference --
8559 ----------------------
8561 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
8563 -- Nothing to do, all processing completed in Par.Prag, since we
8564 -- need the information for possible parser messages that are output
8566 when Pragma_Source_Reference =>
8573 -- pragma Storage_Size (EXPRESSION);
8575 when Pragma_Storage_Size => Storage_Size : declare
8576 P : constant Node_Id := Parent (N);
8580 Check_No_Identifiers;
8581 Check_Arg_Count (1);
8583 -- The expression must be analyzed in the special manner
8584 -- described in "Handling of Default Expressions" in sem.ads.
8586 -- Set In_Default_Expression for per-object case ???
8588 Arg := Expression (Arg1);
8589 Analyze_Per_Use_Expression (Arg, Any_Integer);
8591 if not Is_Static_Expression (Arg) then
8592 Check_Restriction (Static_Storage_Size, Arg);
8595 if Nkind (P) /= N_Task_Definition then
8600 if Has_Storage_Size_Pragma (P) then
8601 Error_Pragma ("duplicate pragma% not allowed");
8603 Set_Has_Storage_Size_Pragma (P, True);
8606 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8607 -- ??? exp_ch9 should use this!
8615 -- pragma Storage_Unit (NUMERIC_LITERAL);
8617 -- Only permitted argument is System'Storage_Unit value
8619 when Pragma_Storage_Unit =>
8620 Check_No_Identifiers;
8621 Check_Arg_Count (1);
8622 Check_Arg_Is_Integer_Literal (Arg1);
8624 if Intval (Expression (Arg1)) /=
8625 UI_From_Int (Ttypes.System_Storage_Unit)
8627 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
8629 ("the only allowed argument for pragma% is ^", Arg1);
8632 --------------------
8633 -- Stream_Convert --
8634 --------------------
8636 -- pragma Stream_Convert (
8637 -- [Entity =>] type_LOCAL_NAME,
8638 -- [Read =>] function_NAME,
8639 -- [Write =>] function NAME);
8641 when Pragma_Stream_Convert => Stream_Convert : declare
8643 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
8644 -- Check that the given argument is the name of a local
8645 -- function of one argument that is not overloaded earlier
8646 -- in the current local scope. A check is also made that the
8647 -- argument is a function with one parameter.
8649 --------------------------------------
8650 -- Check_OK_Stream_Convert_Function --
8651 --------------------------------------
8653 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
8657 Check_Arg_Is_Local_Name (Arg);
8658 Ent := Entity (Expression (Arg));
8660 if Has_Homonym (Ent) then
8662 ("argument for pragma% may not be overloaded", Arg);
8665 if Ekind (Ent) /= E_Function
8666 or else No (First_Formal (Ent))
8667 or else Present (Next_Formal (First_Formal (Ent)))
8670 ("argument for pragma% must be" &
8671 " function of one argument", Arg);
8673 end Check_OK_Stream_Convert_Function;
8675 -- Start of procecessing for Stream_Convert
8679 Check_Arg_Count (3);
8680 Check_Optional_Identifier (Arg1, Name_Entity);
8681 Check_Optional_Identifier (Arg2, Name_Read);
8682 Check_Optional_Identifier (Arg3, Name_Write);
8683 Check_Arg_Is_Local_Name (Arg1);
8684 Check_OK_Stream_Convert_Function (Arg2);
8685 Check_OK_Stream_Convert_Function (Arg3);
8688 Typ : constant Entity_Id :=
8689 Underlying_Type (Entity (Expression (Arg1)));
8690 Read : constant Entity_Id := Entity (Expression (Arg2));
8691 Write : constant Entity_Id := Entity (Expression (Arg3));
8694 if Etype (Typ) = Any_Type
8696 Etype (Read) = Any_Type
8698 Etype (Write) = Any_Type
8703 Check_First_Subtype (Arg1);
8705 if Rep_Item_Too_Early (Typ, N)
8707 Rep_Item_Too_Late (Typ, N)
8712 if Underlying_Type (Etype (Read)) /= Typ then
8714 ("incorrect return type for function&", Arg2);
8717 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
8719 ("incorrect parameter type for function&", Arg3);
8722 if Underlying_Type (Etype (First_Formal (Read))) /=
8723 Underlying_Type (Etype (Write))
8726 ("result type of & does not match Read parameter type",
8732 -------------------------
8733 -- Style_Checks (GNAT) --
8734 -------------------------
8736 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
8738 -- This is processed by the parser since some of the style
8739 -- checks take place during source scanning and parsing. This
8740 -- means that we don't need to issue error messages here.
8742 when Pragma_Style_Checks => Style_Checks : declare
8743 A : constant Node_Id := Expression (Arg1);
8749 Check_No_Identifiers;
8751 -- Two argument form
8753 if Arg_Count = 2 then
8754 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
8761 E_Id := Expression (Arg2);
8764 if not Is_Entity_Name (E_Id) then
8766 ("second argument of pragma% must be entity name",
8776 Set_Suppress_Style_Checks (E,
8777 (Chars (Expression (Arg1)) = Name_Off));
8778 exit when No (Homonym (E));
8784 -- One argument form
8787 Check_Arg_Count (1);
8789 if Nkind (A) = N_String_Literal then
8793 Slen : constant Natural := Natural (String_Length (S));
8794 Options : String (1 .. Slen);
8800 C := Get_String_Char (S, Int (J));
8801 exit when not In_Character_Range (C);
8802 Options (J) := Get_Character (C);
8805 Set_Style_Check_Options (Options);
8813 elsif Nkind (A) = N_Identifier then
8815 if Chars (A) = Name_All_Checks then
8816 Set_Default_Style_Check_Options;
8818 elsif Chars (A) = Name_On then
8819 Style_Check := True;
8821 elsif Chars (A) = Name_Off then
8822 Style_Check := False;
8833 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
8835 when Pragma_Subtitle =>
8837 Check_Arg_Count (1);
8838 Check_Optional_Identifier (Arg1, Name_Subtitle);
8839 Check_Arg_Is_String_Literal (Arg1);
8845 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
8847 when Pragma_Suppress =>
8848 Process_Suppress_Unsuppress (True);
8854 -- pragma Suppress_All;
8856 -- The only check made here is that the pragma appears in the
8857 -- proper place, i.e. following a compilation unit. If indeed
8858 -- it appears in this context, then the parser has already
8859 -- inserted an equivalent pragma Suppress (All_Checks) to get
8860 -- the required effect.
8862 when Pragma_Suppress_All =>
8864 Check_Arg_Count (0);
8866 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
8867 or else not Is_List_Member (N)
8868 or else List_Containing (N) /= Pragmas_After (Parent (N))
8871 ("misplaced pragma%, must follow compilation unit");
8874 -------------------------
8875 -- Suppress_Debug_Info --
8876 -------------------------
8878 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
8880 when Pragma_Suppress_Debug_Info =>
8882 Check_Arg_Count (1);
8883 Check_Arg_Is_Local_Name (Arg1);
8884 Check_Optional_Identifier (Arg1, Name_Entity);
8885 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
8887 ----------------------------------
8888 -- Suppress_Exception_Locations --
8889 ----------------------------------
8891 -- pragma Suppress_Exception_Locations;
8893 when Pragma_Suppress_Exception_Locations =>
8895 Check_Arg_Count (0);
8896 Check_Valid_Configuration_Pragma;
8897 Exception_Locations_Suppressed := True;
8899 -----------------------------
8900 -- Suppress_Initialization --
8901 -----------------------------
8903 -- pragma Suppress_Initialization ([Entity =>] type_Name);
8905 when Pragma_Suppress_Initialization => Suppress_Init : declare
8911 Check_Arg_Count (1);
8912 Check_Optional_Identifier (Arg1, Name_Entity);
8913 Check_Arg_Is_Local_Name (Arg1);
8915 E_Id := Expression (Arg1);
8917 if Etype (E_Id) = Any_Type then
8924 if Is_Incomplete_Or_Private_Type (E) then
8925 if No (Full_View (Base_Type (E))) then
8927 ("argument of pragma% cannot be an incomplete type",
8930 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
8933 Set_Suppress_Init_Proc (Base_Type (E));
8938 ("pragma% requires argument that is a type name", Arg1);
8946 -- pragma System_Name (DIRECT_NAME);
8948 -- Syntax check: one argument, which must be the identifier GNAT
8949 -- or the identifier GCC, no other identifiers are acceptable.
8951 when Pragma_System_Name =>
8952 Check_No_Identifiers;
8953 Check_Arg_Count (1);
8954 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
8956 -----------------------------
8957 -- Task_Dispatching_Policy --
8958 -----------------------------
8960 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
8962 when Pragma_Task_Dispatching_Policy => declare
8966 Check_Ada_83_Warning;
8967 Check_Arg_Count (1);
8968 Check_No_Identifiers;
8969 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
8970 Check_Valid_Configuration_Pragma;
8971 Get_Name_String (Chars (Expression (Arg1)));
8972 DP := Fold_Upper (Name_Buffer (1));
8974 if Task_Dispatching_Policy /= ' '
8975 and then Task_Dispatching_Policy /= DP
8977 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
8979 ("task dispatching policy incompatible with policy#");
8981 -- Set new policy, but always preserve System_Location since
8982 -- we like the error message with the run time name.
8985 Task_Dispatching_Policy := DP;
8987 if Task_Dispatching_Policy_Sloc /= System_Location then
8988 Task_Dispatching_Policy_Sloc := Loc;
8997 -- pragma Task_Info (EXPRESSION);
8999 when Pragma_Task_Info => Task_Info : declare
9000 P : constant Node_Id := Parent (N);
9005 if Nkind (P) /= N_Task_Definition then
9006 Error_Pragma ("pragma% must appear in task definition");
9009 Check_No_Identifiers;
9010 Check_Arg_Count (1);
9012 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
9014 if Etype (Expression (Arg1)) = Any_Type then
9018 if Has_Task_Info_Pragma (P) then
9019 Error_Pragma ("duplicate pragma% not allowed");
9021 Set_Has_Task_Info_Pragma (P, True);
9029 -- pragma Task_Name (string_EXPRESSION);
9031 when Pragma_Task_Name => Task_Name : declare
9032 -- pragma Priority (EXPRESSION);
9034 P : constant Node_Id := Parent (N);
9038 Check_No_Identifiers;
9039 Check_Arg_Count (1);
9041 Arg := Expression (Arg1);
9042 Analyze_And_Resolve (Arg, Standard_String);
9044 if Nkind (P) /= N_Task_Definition then
9048 if Has_Task_Name_Pragma (P) then
9049 Error_Pragma ("duplicate pragma% not allowed");
9051 Set_Has_Task_Name_Pragma (P, True);
9052 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9060 -- pragma Task_Storage (
9061 -- [Task_Type =>] LOCAL_NAME,
9062 -- [Top_Guard =>] static_integer_EXPRESSION);
9064 when Pragma_Task_Storage => Task_Storage : declare
9065 Args : Args_List (1 .. 2);
9066 Names : constant Name_List (1 .. 2) := (
9070 Task_Type : Node_Id renames Args (1);
9071 Top_Guard : Node_Id renames Args (2);
9077 Gather_Associations (Names, Args);
9079 if No (Task_Type) then
9081 ("missing task_type argument for pragma%");
9084 Check_Arg_Is_Local_Name (Task_Type);
9086 Ent := Entity (Task_Type);
9088 if not Is_Task_Type (Ent) then
9090 ("argument for pragma% must be task type", Task_Type);
9093 if No (Top_Guard) then
9095 ("pragma% takes two arguments", Task_Type);
9097 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
9100 Check_First_Subtype (Task_Type);
9102 if Rep_Item_Too_Late (Ent, N) then
9111 -- pragma Thread_Body
9112 -- ( [Entity =>] LOCAL_NAME
9113 -- [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);
9115 when Pragma_Thread_Body => Thread_Body : declare
9122 Check_At_Least_N_Arguments (1);
9123 Check_At_Most_N_Arguments (2);
9124 Check_Optional_Identifier (Arg1, Name_Entity);
9125 Check_Arg_Is_Local_Name (Arg1);
9127 Id := Expression (Arg1);
9129 if not Is_Entity_Name (Id)
9130 or else not Is_Subprogram (Entity (Id))
9132 Error_Pragma_Arg ("subprogram name required", Arg1);
9137 -- Go to renamed subprogram if present, since Thread_Body applies
9138 -- to the actual renamed entity, not to the renaming entity.
9140 if Present (Alias (E))
9141 and then Nkind (Parent (Declaration_Node (E))) =
9142 N_Subprogram_Renaming_Declaration
9147 -- Various error checks
9149 if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
9151 ("pragma% requires separate spec and must come before body");
9153 elsif Rep_Item_Too_Early (E, N)
9155 Rep_Item_Too_Late (E, N)
9159 elsif Is_Thread_Body (E) then
9161 ("only one thread body pragma allowed", Arg1);
9163 elsif Present (Homonym (E))
9164 and then Scope (Homonym (E)) = Current_Scope
9167 ("thread body subprogram must not be overloaded", Arg1);
9170 Set_Is_Thread_Body (E);
9172 -- Deal with secondary stack argument
9174 if Arg_Count = 2 then
9175 Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
9176 SS := Expression (Arg2);
9177 Analyze_And_Resolve (SS, Any_Integer);
9185 -- pragma Time_Slice (static_duration_EXPRESSION);
9187 when Pragma_Time_Slice => Time_Slice : declare
9193 Check_Arg_Count (1);
9194 Check_No_Identifiers;
9195 Check_In_Main_Program;
9196 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
9198 if not Error_Posted (Arg1) then
9200 while Present (Nod) loop
9201 if Nkind (Nod) = N_Pragma
9202 and then Chars (Nod) = Name_Time_Slice
9204 Error_Msg_Name_1 := Chars (N);
9205 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9212 -- Process only if in main unit
9214 if Get_Source_Unit (Loc) = Main_Unit then
9215 Opt.Time_Slice_Set := True;
9216 Val := Expr_Value_R (Expression (Arg1));
9218 if Val <= Ureal_0 then
9219 Opt.Time_Slice_Value := 0;
9221 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
9222 Opt.Time_Slice_Value := 1_000_000_000;
9225 Opt.Time_Slice_Value :=
9226 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
9235 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
9237 -- TITLING_OPTION ::=
9238 -- [Title =>] STRING_LITERAL
9239 -- | [Subtitle =>] STRING_LITERAL
9241 when Pragma_Title => Title : declare
9242 Args : Args_List (1 .. 2);
9243 Names : constant Name_List (1 .. 2) := (
9249 Gather_Associations (Names, Args);
9251 for J in 1 .. 2 loop
9252 if Present (Args (J)) then
9253 Check_Arg_Is_String_Literal (Args (J));
9258 ---------------------
9259 -- Unchecked_Union --
9260 ---------------------
9262 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
9264 when Pragma_Unchecked_Union => Unchecked_Union : declare
9265 Assoc : constant Node_Id := Arg1;
9266 Type_Id : constant Node_Id := Expression (Assoc);
9277 Check_No_Identifiers;
9278 Check_Arg_Count (1);
9279 Check_Arg_Is_Local_Name (Arg1);
9281 Find_Type (Type_Id);
9282 Typ := Entity (Type_Id);
9285 or else Rep_Item_Too_Early (Typ, N)
9289 Typ := Underlying_Type (Typ);
9292 if Rep_Item_Too_Late (Typ, N) then
9296 Check_First_Subtype (Arg1);
9298 -- Note remaining cases are references to a type in the current
9299 -- declarative part. If we find an error, we post the error on
9300 -- the relevant type declaration at an appropriate point.
9302 if not Is_Record_Type (Typ) then
9303 Error_Msg_N ("Unchecked_Union must be record type", Typ);
9306 elsif Is_Tagged_Type (Typ) then
9307 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
9310 elsif Is_Limited_Type (Typ) then
9312 ("Unchecked_Union must not be limited record type", Typ);
9313 Explain_Limited_Type (Typ, Typ);
9317 if not Has_Discriminants (Typ) then
9319 ("Unchecked_Union must have one discriminant", Typ);
9323 Discr := First_Discriminant (Typ);
9325 if Present (Next_Discriminant (Discr)) then
9327 ("Unchecked_Union must have exactly one discriminant",
9328 Next_Discriminant (Discr));
9332 if No (Discriminant_Default_Value (Discr)) then
9334 ("Unchecked_Union discriminant must have default value",
9338 Tdef := Type_Definition (Declaration_Node (Typ));
9339 Clist := Component_List (Tdef);
9341 if No (Clist) or else No (Variant_Part (Clist)) then
9343 ("Unchecked_Union must have variant part",
9348 Vpart := Variant_Part (Clist);
9350 if Is_Non_Empty_List (Component_Items (Clist)) then
9352 ("components before variant not allowed " &
9353 "in Unchecked_Union",
9354 First (Component_Items (Clist)));
9357 Variant := First (Variants (Vpart));
9358 while Present (Variant) loop
9359 Clist := Component_List (Variant);
9361 if Present (Variant_Part (Clist)) then
9363 ("Unchecked_Union may not have nested variants",
9364 Variant_Part (Clist));
9367 if not Is_Non_Empty_List (Component_Items (Clist)) then
9369 ("Unchecked_Union may not have empty component list",
9374 Comp := First (Component_Items (Clist));
9376 if Nkind (Comp) = N_Component_Declaration then
9378 if Present (Expression (Comp)) then
9380 ("default initialization not allowed " &
9381 "in Unchecked_Union",
9386 Sindic : constant Node_Id :=
9387 Subtype_Indication (Component_Definition (Comp));
9390 if Nkind (Sindic) = N_Subtype_Indication then
9391 Check_Static_Constraint (Constraint (Sindic));
9396 if Present (Next (Comp)) then
9398 ("Unchecked_Union variant can have only one component",
9406 Set_Is_Unchecked_Union (Typ, True);
9407 Set_Convention (Typ, Convention_C);
9409 Set_Has_Unchecked_Union (Base_Type (Typ), True);
9410 Set_Is_Unchecked_Union (Base_Type (Typ), True);
9411 end Unchecked_Union;
9413 ------------------------
9414 -- Unimplemented_Unit --
9415 ------------------------
9417 -- pragma Unimplemented_Unit;
9419 -- Note: this only gives an error if we are generating code,
9420 -- or if we are in a generic library unit (where the pragma
9421 -- appears in the body, not in the spec).
9423 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
9424 Cunitent : constant Entity_Id :=
9425 Cunit_Entity (Get_Source_Unit (Loc));
9426 Ent_Kind : constant Entity_Kind :=
9431 Check_Arg_Count (0);
9433 if Operating_Mode = Generate_Code
9434 or else Ent_Kind = E_Generic_Function
9435 or else Ent_Kind = E_Generic_Procedure
9436 or else Ent_Kind = E_Generic_Package
9438 Get_Name_String (Chars (Cunitent));
9439 Set_Casing (Mixed_Case);
9440 Write_Str (Name_Buffer (1 .. Name_Len));
9441 Write_Str (" is not implemented");
9443 raise Unrecoverable_Error;
9445 end Unimplemented_Unit;
9447 --------------------
9448 -- Universal_Data --
9449 --------------------
9451 -- pragma Universal_Data [(library_unit_NAME)];
9453 when Pragma_Universal_Data =>
9456 -- If this is a configuration pragma, then set the universal
9457 -- addressing option, otherwise confirm that the pragma
9458 -- satisfies the requirements of library unit pragma placement
9459 -- and leave it to the GNAAMP back end to detect the pragma
9460 -- (avoids transitive setting of the option due to withed units).
9462 if Is_Configuration_Pragma then
9463 Universal_Addressing_On_AAMP := True;
9465 Check_Valid_Library_Unit_Pragma;
9468 if not AAMP_On_Target then
9469 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
9476 -- pragma Unreferenced (local_Name {, local_Name});
9478 when Pragma_Unreferenced => Unreferenced : declare
9481 Arg_Ent : Entity_Id;
9485 Check_At_Least_N_Arguments (1);
9489 while Present (Arg_Node) loop
9490 Check_No_Identifier (Arg_Node);
9492 -- Note that the analyze call done by Check_Arg_Is_Local_Name
9493 -- will in fact generate a reference, so that the entity will
9494 -- have a reference, which will inhibit any warnings about it
9495 -- not being referenced, and also properly show up in the ali
9496 -- file as a reference. But this reference is recorded before
9497 -- the Has_Pragma_Unreferenced flag is set, so that no warning
9498 -- is generated for this reference.
9500 Check_Arg_Is_Local_Name (Arg_Node);
9501 Arg_Expr := Get_Pragma_Arg (Arg_Node);
9503 if Is_Entity_Name (Arg_Expr) then
9504 Arg_Ent := Entity (Arg_Expr);
9506 -- If the entity is overloaded, the pragma applies to the
9507 -- most recent overloading, as documented. In this case,
9508 -- name resolution does not generate a reference, so it
9509 -- must be done here explicitly.
9511 if Is_Overloaded (Arg_Expr) then
9512 Generate_Reference (Arg_Ent, N);
9515 Set_Has_Pragma_Unreferenced (Arg_Ent);
9522 ------------------------------
9523 -- Unreserve_All_Interrupts --
9524 ------------------------------
9526 -- pragma Unreserve_All_Interrupts;
9528 when Pragma_Unreserve_All_Interrupts =>
9530 Check_Arg_Count (0);
9532 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
9533 Unreserve_All_Interrupts := True;
9540 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
9542 when Pragma_Unsuppress =>
9544 Process_Suppress_Unsuppress (False);
9550 -- pragma Use_VADS_Size;
9552 when Pragma_Use_VADS_Size =>
9554 Check_Arg_Count (0);
9555 Check_Valid_Configuration_Pragma;
9556 Use_VADS_Size := True;
9558 ---------------------
9559 -- Validity_Checks --
9560 ---------------------
9562 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
9564 when Pragma_Validity_Checks => Validity_Checks : declare
9565 A : constant Node_Id := Expression (Arg1);
9571 Check_Arg_Count (1);
9572 Check_No_Identifiers;
9574 if Nkind (A) = N_String_Literal then
9578 Slen : constant Natural := Natural (String_Length (S));
9579 Options : String (1 .. Slen);
9585 C := Get_String_Char (S, Int (J));
9586 exit when not In_Character_Range (C);
9587 Options (J) := Get_Character (C);
9590 Set_Validity_Check_Options (Options);
9598 elsif Nkind (A) = N_Identifier then
9600 if Chars (A) = Name_All_Checks then
9601 Set_Validity_Check_Options ("a");
9603 elsif Chars (A) = Name_On then
9604 Validity_Checks_On := True;
9606 elsif Chars (A) = Name_Off then
9607 Validity_Checks_On := False;
9611 end Validity_Checks;
9617 -- pragma Volatile (LOCAL_NAME);
9619 when Pragma_Volatile =>
9620 Process_Atomic_Shared_Volatile;
9622 -------------------------
9623 -- Volatile_Components --
9624 -------------------------
9626 -- pragma Volatile_Components (array_LOCAL_NAME);
9628 -- Volatile is handled by the same circuit as Atomic_Components
9634 -- pragma Warnings (On | Off, [LOCAL_NAME])
9636 when Pragma_Warnings => Warnings : begin
9638 Check_At_Least_N_Arguments (1);
9639 Check_At_Most_N_Arguments (2);
9640 Check_No_Identifiers;
9642 -- One argument case was processed by parser in Par.Prag
9644 if Arg_Count /= 1 then
9645 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9646 Check_Arg_Count (2);
9653 E_Id := Expression (Arg2);
9656 -- In the expansion of an inlined body, a reference to
9657 -- the formal may be wrapped in a conversion if the actual
9658 -- is a conversion. Retrieve the real entity name.
9660 if (In_Instance_Body
9661 or else In_Inlined_Body)
9662 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
9664 E_Id := Expression (E_Id);
9667 if not Is_Entity_Name (E_Id) then
9669 ("second argument of pragma% must be entity name",
9679 Set_Warnings_Off (E,
9680 (Chars (Expression (Arg1)) = Name_Off));
9682 if Is_Enumeration_Type (E) then
9684 Lit : Entity_Id := First_Literal (E);
9687 while Present (Lit) loop
9688 Set_Warnings_Off (Lit);
9694 exit when No (Homonym (E));
9706 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
9708 when Pragma_Weak_External => Weak_External : declare
9713 Check_Arg_Count (1);
9714 Check_Optional_Identifier (Arg1, Name_Entity);
9715 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9716 Ent := Entity (Expression (Arg1));
9718 if Rep_Item_Too_Early (Ent, N) then
9721 Ent := Underlying_Type (Ent);
9724 -- The only processing required is to link this item on to the
9725 -- list of rep items for the given entity. This is accomplished
9726 -- by the call to Rep_Item_Too_Late (when no error is detected
9727 -- and False is returned).
9729 if Rep_Item_Too_Late (Ent, N) then
9732 Set_Has_Gigi_Rep_Item (Ent);
9736 --------------------
9737 -- Unknown_Pragma --
9738 --------------------
9740 -- Should be impossible, since the case of an unknown pragma is
9741 -- separately processed before the case statement is entered.
9743 when Unknown_Pragma =>
9744 raise Program_Error;
9749 when Pragma_Exit => null;
9752 ---------------------------------
9753 -- Delay_Config_Pragma_Analyze --
9754 ---------------------------------
9756 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
9758 return Chars (N) = Name_Interrupt_State;
9759 end Delay_Config_Pragma_Analyze;
9761 -------------------------
9762 -- Get_Base_Subprogram --
9763 -------------------------
9765 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
9771 -- Follow subprogram renaming chain
9773 while Is_Subprogram (Result)
9775 (Is_Generic_Instance (Result)
9776 or else Nkind (Parent (Declaration_Node (Result))) =
9777 N_Subprogram_Renaming_Declaration)
9778 and then Present (Alias (Result))
9780 Result := Alias (Result);
9784 end Get_Base_Subprogram;
9786 -----------------------------------------
9787 -- Is_Non_Significant_Pragma_Reference --
9788 -----------------------------------------
9790 -- This function makes use of the following static table which indicates
9791 -- whether a given pragma is significant. A value of -1 in this table
9792 -- indicates that the reference is significant. A value of zero indicates
9793 -- than appearence as any argument is insignificant, a positive value
9794 -- indicates that appearence in that parameter position is significant.
9796 Sig_Flags : constant array (Pragma_Id) of Int :=
9797 (Pragma_AST_Entry => -1,
9798 Pragma_Abort_Defer => -1,
9799 Pragma_Ada_83 => -1,
9800 Pragma_Ada_95 => -1,
9801 Pragma_All_Calls_Remote => -1,
9802 Pragma_Annotate => -1,
9803 Pragma_Assert => -1,
9804 Pragma_Asynchronous => -1,
9806 Pragma_Atomic_Components => 0,
9807 Pragma_Attach_Handler => -1,
9808 Pragma_CPP_Class => 0,
9809 Pragma_CPP_Constructor => 0,
9810 Pragma_CPP_Virtual => 0,
9811 Pragma_CPP_Vtable => 0,
9812 Pragma_C_Pass_By_Copy => 0,
9813 Pragma_Comment => 0,
9814 Pragma_Common_Object => -1,
9815 Pragma_Compile_Time_Warning => -1,
9816 Pragma_Complex_Representation => 0,
9817 Pragma_Component_Alignment => -1,
9818 Pragma_Controlled => 0,
9819 Pragma_Convention => 0,
9820 Pragma_Convention_Identifier => 0,
9822 Pragma_Discard_Names => 0,
9823 Pragma_Elaborate => -1,
9824 Pragma_Elaborate_All => -1,
9825 Pragma_Elaborate_Body => -1,
9826 Pragma_Elaboration_Checks => -1,
9827 Pragma_Eliminate => -1,
9828 Pragma_Explicit_Overriding => -1,
9829 Pragma_Export => -1,
9830 Pragma_Export_Exception => -1,
9831 Pragma_Export_Function => -1,
9832 Pragma_Export_Object => -1,
9833 Pragma_Export_Procedure => -1,
9834 Pragma_Export_Value => -1,
9835 Pragma_Export_Valued_Procedure => -1,
9836 Pragma_Extend_System => -1,
9837 Pragma_Extensions_Allowed => -1,
9838 Pragma_External => -1,
9839 Pragma_External_Name_Casing => -1,
9840 Pragma_Finalize_Storage_Only => 0,
9841 Pragma_Float_Representation => 0,
9843 Pragma_Import => +2,
9844 Pragma_Import_Exception => 0,
9845 Pragma_Import_Function => 0,
9846 Pragma_Import_Object => 0,
9847 Pragma_Import_Procedure => 0,
9848 Pragma_Import_Valued_Procedure => 0,
9849 Pragma_Initialize_Scalars => -1,
9851 Pragma_Inline_Always => 0,
9852 Pragma_Inline_Generic => 0,
9853 Pragma_Inspection_Point => -1,
9854 Pragma_Interface => +2,
9855 Pragma_Interface_Name => +2,
9856 Pragma_Interrupt_Handler => -1,
9857 Pragma_Interrupt_Priority => -1,
9858 Pragma_Interrupt_State => -1,
9859 Pragma_Java_Constructor => -1,
9860 Pragma_Java_Interface => -1,
9861 Pragma_Keep_Names => 0,
9862 Pragma_License => -1,
9863 Pragma_Link_With => -1,
9864 Pragma_Linker_Alias => -1,
9865 Pragma_Linker_Options => -1,
9866 Pragma_Linker_Section => -1,
9868 Pragma_Locking_Policy => -1,
9869 Pragma_Long_Float => -1,
9870 Pragma_Machine_Attribute => -1,
9872 Pragma_Main_Storage => -1,
9873 Pragma_Memory_Size => -1,
9874 Pragma_No_Return => 0,
9875 Pragma_No_Run_Time => -1,
9876 Pragma_Normalize_Scalars => -1,
9877 Pragma_Obsolescent => 0,
9878 Pragma_Optimize => -1,
9879 Pragma_Optional_Overriding => -1,
9880 Pragma_Overriding => -1,
9883 Pragma_Passive => -1,
9884 Pragma_Polling => -1,
9885 Pragma_Persistent_Data => -1,
9886 Pragma_Persistent_Object => -1,
9887 Pragma_Preelaborate => -1,
9888 Pragma_Priority => -1,
9889 Pragma_Propagate_Exceptions => -1,
9890 Pragma_Psect_Object => -1,
9892 Pragma_Pure_Function => 0,
9893 Pragma_Queuing_Policy => -1,
9894 Pragma_Ravenscar => -1,
9895 Pragma_Remote_Call_Interface => -1,
9896 Pragma_Remote_Types => -1,
9897 Pragma_Restricted_Run_Time => -1,
9898 Pragma_Restriction_Warnings => -1,
9899 Pragma_Restrictions => -1,
9900 Pragma_Reviewable => -1,
9901 Pragma_Share_Generic => -1,
9902 Pragma_Shared => -1,
9903 Pragma_Shared_Passive => -1,
9904 Pragma_Source_File_Name => -1,
9905 Pragma_Source_File_Name_Project => -1,
9906 Pragma_Source_Reference => -1,
9907 Pragma_Storage_Size => -1,
9908 Pragma_Storage_Unit => -1,
9909 Pragma_Stream_Convert => -1,
9910 Pragma_Style_Checks => -1,
9911 Pragma_Subtitle => -1,
9912 Pragma_Suppress => 0,
9913 Pragma_Suppress_Exception_Locations => 0,
9914 Pragma_Suppress_All => -1,
9915 Pragma_Suppress_Debug_Info => 0,
9916 Pragma_Suppress_Initialization => 0,
9917 Pragma_System_Name => -1,
9918 Pragma_Task_Dispatching_Policy => -1,
9919 Pragma_Task_Info => -1,
9920 Pragma_Task_Name => -1,
9921 Pragma_Task_Storage => 0,
9922 Pragma_Thread_Body => +2,
9923 Pragma_Time_Slice => -1,
9925 Pragma_Unchecked_Union => -1,
9926 Pragma_Unimplemented_Unit => -1,
9927 Pragma_Universal_Data => -1,
9928 Pragma_Unreferenced => -1,
9929 Pragma_Unreserve_All_Interrupts => -1,
9930 Pragma_Unsuppress => 0,
9931 Pragma_Use_VADS_Size => -1,
9932 Pragma_Validity_Checks => -1,
9933 Pragma_Volatile => 0,
9934 Pragma_Volatile_Components => 0,
9935 Pragma_Warnings => -1,
9936 Pragma_Weak_External => 0,
9937 Unknown_Pragma => 0);
9939 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
9947 if Nkind (P) /= N_Pragma_Argument_Association then
9951 C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
9961 A := First (Pragma_Argument_Associations (Parent (P)));
9962 for J in 1 .. C - 1 loop
9973 end Is_Non_Significant_Pragma_Reference;
9975 ------------------------------
9976 -- Is_Pragma_String_Literal --
9977 ------------------------------
9979 -- This function returns true if the corresponding pragma argument is
9980 -- a static string expression. These are the only cases in which string
9981 -- literals can appear as pragma arguments. We also allow a string
9982 -- literal as the first argument to pragma Assert (although it will
9983 -- of course always generate a type error).
9985 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
9986 Pragn : constant Node_Id := Parent (Par);
9987 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
9988 Pname : constant Name_Id := Chars (Pragn);
10001 if Pname = Name_Assert then
10004 elsif Pname = Name_Export then
10007 elsif Pname = Name_Ident then
10010 elsif Pname = Name_Import then
10013 elsif Pname = Name_Interface_Name then
10016 elsif Pname = Name_Linker_Alias then
10019 elsif Pname = Name_Linker_Section then
10022 elsif Pname = Name_Machine_Attribute then
10025 elsif Pname = Name_Source_File_Name then
10028 elsif Pname = Name_Source_Reference then
10031 elsif Pname = Name_Title then
10034 elsif Pname = Name_Subtitle then
10040 end Is_Pragma_String_Literal;
10042 --------------------------------------
10043 -- Process_Compilation_Unit_Pragmas --
10044 --------------------------------------
10046 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
10048 -- A special check for pragma Suppress_All. This is a strange DEC
10049 -- pragma, strange because it comes at the end of the unit. If we
10050 -- have a pragma Suppress_All in the Pragmas_After of the current
10051 -- unit, then we insert a pragma Suppress (All_Checks) at the start
10052 -- of the context clause to ensure the correct processing.
10055 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
10059 if Present (PA) then
10061 while Present (P) loop
10062 if Chars (P) = Name_Suppress_All then
10063 Prepend_To (Context_Items (N),
10064 Make_Pragma (Sloc (P),
10065 Chars => Name_Suppress,
10066 Pragma_Argument_Associations => New_List (
10067 Make_Pragma_Argument_Association (Sloc (P),
10069 Make_Identifier (Sloc (P),
10070 Chars => Name_All_Checks)))));
10078 end Process_Compilation_Unit_Pragmas;
10080 --------------------------------
10081 -- Set_Encoded_Interface_Name --
10082 --------------------------------
10084 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
10085 Str : constant String_Id := Strval (S);
10086 Len : constant Int := String_Length (Str);
10091 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
10094 -- Stores encoded value of character code CC. The encoding we
10095 -- use an underscore followed by four lower case hex digits.
10097 procedure Encode is
10099 Store_String_Char (Get_Char_Code ('_'));
10101 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
10103 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
10105 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
10107 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
10110 -- Start of processing for Set_Encoded_Interface_Name
10113 -- If first character is asterisk, this is a link name, and we
10114 -- leave it completely unmodified. We also ignore null strings
10115 -- (the latter case happens only in error cases) and no encoding
10116 -- should occur for Java interface names.
10119 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
10122 Set_Interface_Name (E, S);
10127 CC := Get_String_Char (Str, J);
10129 exit when not In_Character_Range (CC);
10131 C := Get_Character (CC);
10133 exit when C /= '_' and then C /= '$'
10134 and then C not in '0' .. '9'
10135 and then C not in 'a' .. 'z'
10136 and then C not in 'A' .. 'Z';
10139 Set_Interface_Name (E, S);
10147 -- Here we need to encode. The encoding we use as follows:
10148 -- three underscores + four hex digits (lower case)
10152 for J in 1 .. String_Length (Str) loop
10153 CC := Get_String_Char (Str, J);
10155 if not In_Character_Range (CC) then
10158 C := Get_Character (CC);
10160 if C = '_' or else C = '$'
10161 or else C in '0' .. '9'
10162 or else C in 'a' .. 'z'
10163 or else C in 'A' .. 'Z'
10165 Store_String_Char (CC);
10172 Set_Interface_Name (E,
10173 Make_String_Literal (Sloc (S),
10174 Strval => End_String));
10176 end Set_Encoded_Interface_Name;
10178 -------------------
10179 -- Set_Unit_Name --
10180 -------------------
10182 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
10187 if Nkind (N) = N_Identifier
10188 and then Nkind (With_Item) = N_Identifier
10190 Set_Entity (N, Entity (With_Item));
10192 elsif Nkind (N) = N_Selected_Component then
10193 Change_Selected_Component_To_Expanded_Name (N);
10194 Set_Entity (N, Entity (With_Item));
10195 Set_Entity (Selector_Name (N), Entity (N));
10197 Pref := Prefix (N);
10198 Scop := Scope (Entity (N));
10200 while Nkind (Pref) = N_Selected_Component loop
10201 Change_Selected_Component_To_Expanded_Name (Pref);
10202 Set_Entity (Selector_Name (Pref), Scop);
10203 Set_Entity (Pref, Scop);
10204 Pref := Prefix (Pref);
10205 Scop := Scope (Scop);
10208 Set_Entity (Pref, Scop);