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 Exp_Dist; use Exp_Dist;
41 with Hostparm; use Hostparm;
43 with Lib.Writ; use Lib.Writ;
44 with Lib.Xref; use Lib.Xref;
45 with Namet; use Namet;
46 with Nlists; use Nlists;
47 with Nmake; use Nmake;
49 with Output; use Output;
50 with Restrict; use Restrict;
51 with Rident; use Rident;
52 with Rtsfind; use Rtsfind;
54 with Sem_Ch3; use Sem_Ch3;
55 with Sem_Ch8; use Sem_Ch8;
56 with Sem_Ch13; use Sem_Ch13;
57 with Sem_Disp; use Sem_Disp;
58 with Sem_Elim; use Sem_Elim;
59 with Sem_Eval; use Sem_Eval;
60 with Sem_Intr; use Sem_Intr;
61 with Sem_Mech; use Sem_Mech;
62 with Sem_Res; use Sem_Res;
63 with Sem_Type; use Sem_Type;
64 with Sem_Util; use Sem_Util;
65 with Sem_VFpt; use Sem_VFpt;
66 with Stand; use Stand;
67 with Sinfo; use Sinfo;
68 with Sinfo.CN; use Sinfo.CN;
69 with Sinput; use Sinput;
70 with Snames; use Snames;
71 with Stringt; use Stringt;
72 with Stylesw; use Stylesw;
74 with Targparm; use Targparm;
75 with Tbuild; use Tbuild;
77 with Uintp; use Uintp;
78 with Urealp; use Urealp;
79 with Validsw; use Validsw;
81 with GNAT.Spelling_Checker; use GNAT.Spelling_Checker;
83 package body Sem_Prag is
85 ----------------------------------------------
86 -- Common Handling of Import-Export Pragmas --
87 ----------------------------------------------
89 -- In the following section, a number of Import_xxx and Export_xxx
90 -- pragmas are defined by GNAT. These are compatible with the DEC
91 -- pragmas of the same name, and all have the following common
92 -- form and processing:
95 -- [Internal =>] LOCAL_NAME,
96 -- [, [External =>] EXTERNAL_SYMBOL]
97 -- [, other optional parameters ]);
100 -- [Internal =>] LOCAL_NAME,
101 -- [, [External =>] EXTERNAL_SYMBOL]
102 -- [, other optional parameters ]);
104 -- EXTERNAL_SYMBOL ::=
106 -- | static_string_EXPRESSION
108 -- The internal LOCAL_NAME designates the entity that is imported or
109 -- exported, and must refer to an entity in the current declarative
110 -- part (as required by the rules for LOCAL_NAME).
112 -- The external linker name is designated by the External parameter
113 -- if given, or the Internal parameter if not (if there is no External
114 -- parameter, the External parameter is a copy of the Internal name).
116 -- If the External parameter is given as a string, then this string
117 -- is treated as an external name (exactly as though it had been given
118 -- as an External_Name parameter for a normal Import pragma).
120 -- If the External parameter is given as an identifier (or there is no
121 -- External parameter, so that the Internal identifier is used), then
122 -- the external name is the characters of the identifier, translated
123 -- to all upper case letters for OpenVMS versions of GNAT, and to all
124 -- lower case letters for all other versions
126 -- Note: the external name specified or implied by any of these special
127 -- Import_xxx or Export_xxx pragmas override an external or link name
128 -- specified in a previous Import or Export pragma.
130 -- Note: these and all other DEC-compatible GNAT pragmas allow full
131 -- use of named notation, following the standard rules for subprogram
132 -- calls, i.e. parameters can be given in any order if named notation
133 -- is used, and positional and named notation can be mixed, subject to
134 -- the rule that all positional parameters must appear first.
136 -- Note: All these pragmas are implemented exactly following the DEC
137 -- design and implementation and are intended to be fully compatible
138 -- with the use of these pragmas in the DEC Ada compiler.
140 --------------------------------------------
141 -- Checking for Duplicated External Names --
142 --------------------------------------------
144 -- It is suspicious if two separate Export pragmas use the same external
145 -- name. The following table is used to diagnose this situation so that
146 -- an appropriate warning can be issued.
148 -- The Node_Id stored is for the N_String_Literal node created to
149 -- hold the value of the external name. The Sloc of this node is
150 -- used to cross-reference the location of the duplication.
152 package Externals is new Table.Table (
153 Table_Component_Type => Node_Id,
154 Table_Index_Type => Int,
155 Table_Low_Bound => 0,
156 Table_Initial => 100,
157 Table_Increment => 100,
158 Table_Name => "Name_Externals");
160 -------------------------------------
161 -- Local Subprograms and Variables --
162 -------------------------------------
164 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
165 -- This routine is used for possible casing adjustment of an explicit
166 -- external name supplied as a string literal (the node N), according
167 -- to the casing requirement of Opt.External_Name_Casing. If this is
168 -- set to As_Is, then the string literal is returned unchanged, but if
169 -- it is set to Uppercase or Lowercase, then a new string literal with
170 -- appropriate casing is constructed.
172 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
173 -- If Def_Id refers to a renamed subprogram, then the base subprogram
174 -- (the original one, following the renaming chain) is returned.
175 -- Otherwise the entity is returned unchanged. Should be in Einfo???
177 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
178 -- Place semantic information on the argument of an Elaborate or
179 -- Elaborate_All pragma. Entity name for unit and its parents is
180 -- taken from item in previous with_clause that mentions the unit.
182 -------------------------------
183 -- Adjust_External_Name_Case --
184 -------------------------------
186 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
190 -- Adjust case of literal if required
192 if Opt.External_Name_Exp_Casing = As_Is then
196 -- Copy existing string
202 for J in 1 .. String_Length (Strval (N)) loop
203 CC := Get_String_Char (Strval (N), J);
205 if Opt.External_Name_Exp_Casing = Uppercase
206 and then CC >= Get_Char_Code ('a')
207 and then CC <= Get_Char_Code ('z')
209 Store_String_Char (CC - 32);
211 elsif Opt.External_Name_Exp_Casing = Lowercase
212 and then CC >= Get_Char_Code ('A')
213 and then CC <= Get_Char_Code ('Z')
215 Store_String_Char (CC + 32);
218 Store_String_Char (CC);
223 Make_String_Literal (Sloc (N),
224 Strval => End_String);
226 end Adjust_External_Name_Case;
232 procedure Analyze_Pragma (N : Node_Id) is
233 Loc : constant Source_Ptr := Sloc (N);
236 Pragma_Exit : exception;
237 -- This exception is used to exit pragma processing completely. It
238 -- is used when an error is detected, and in other situations where
239 -- it is known that no further processing is required.
242 -- Number of pragma argument associations
248 -- First four pragma arguments (pragma argument association nodes,
249 -- or Empty if the corresponding argument does not exist).
251 procedure Check_Ada_83_Warning;
252 -- Issues a warning message for the current pragma if operating in Ada
253 -- 83 mode (used for language pragmas that are not a standard part of
254 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
257 procedure Check_Arg_Count (Required : Nat);
258 -- Check argument count for pragma is equal to given parameter.
259 -- If not, then issue an error message and raise Pragma_Exit.
261 -- Note: all routines whose name is Check_Arg_Is_xxx take an
262 -- argument Arg which can either be a pragma argument association,
263 -- in which case the check is applied to the expression of the
264 -- association or an expression directly.
266 procedure Check_Arg_Is_External_Name (Arg : Node_Id);
267 -- Check that an argument has the right form for an EXTERNAL_NAME
268 -- parameter of an extended import/export pragma. The rule is that
269 -- the name must be an identifier or string literal (in Ada 83 mode)
270 -- or a static string expression (in Ada 95 mode).
272 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
273 -- Check the specified argument Arg to make sure that it is an
274 -- identifier. If not give error and raise Pragma_Exit.
276 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
277 -- Check the specified argument Arg to make sure that it is an
278 -- integer literal. If not give error and raise Pragma_Exit.
280 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
281 -- Check the specified argument Arg to make sure that it has the
282 -- proper syntactic form for a local name and meets the semantic
283 -- requirements for a local name. The local name is analyzed as
284 -- part of the processing for this call. In addition, the local
285 -- name is required to represent an entity at the library level.
287 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
288 -- Check the specified argument Arg to make sure that it has the
289 -- proper syntactic form for a local name and meets the semantic
290 -- requirements for a local name. The local name is analyzed as
291 -- part of the processing for this call.
293 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
294 -- Check the specified argument Arg to make sure that it is a valid
295 -- locking policy name. If not give error and raise Pragma_Exit.
297 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
298 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
299 -- Check the specified argument Arg to make sure that it is an
300 -- identifier whose name matches either N1 or N2 (or N3 if present).
301 -- If not then give error and raise Pragma_Exit.
303 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
304 -- Check the specified argument Arg to make sure that it is a valid
305 -- queuing policy name. If not give error and raise Pragma_Exit.
307 procedure Check_Arg_Is_Static_Expression
310 -- Check the specified argument Arg to make sure that it is a static
311 -- expression of the given type (i.e. it will be analyzed and resolved
312 -- using this type, which can be any valid argument to Resolve, e.g.
313 -- Any_Integer is OK). If not, given error and raise Pragma_Exit.
315 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
316 -- Check the specified argument Arg to make sure that it is a
317 -- string literal. If not give error and raise Pragma_Exit
319 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
320 -- Check the specified argument Arg to make sure that it is a valid
321 -- valid task dispatching policy name. If not give error and raise
324 procedure Check_At_Least_N_Arguments (N : Nat);
325 -- Check there are at least N arguments present
327 procedure Check_At_Most_N_Arguments (N : Nat);
328 -- Check there are no more than N arguments present
330 procedure Check_Component (Comp : Node_Id);
331 -- Examine Unchecked_Union component for correct use of per-object
332 -- constrained subtypes.
334 procedure Check_Duplicated_Export_Name (Nam : Node_Id);
335 -- Nam is an N_String_Literal node containing the external name set
336 -- by an Import or Export pragma (or extended Import or Export pragma).
337 -- This procedure checks for possible duplications if this is the
338 -- export case, and if found, issues an appropriate error message.
340 procedure Check_First_Subtype (Arg : Node_Id);
341 -- Checks that Arg, whose expression is an entity name referencing
342 -- a subtype, does not reference a type that is not a first subtype.
344 procedure Check_In_Main_Program;
345 -- Common checks for pragmas that appear within a main program
346 -- (Priority, Main_Storage, Time_Slice).
348 procedure Check_Interrupt_Or_Attach_Handler;
349 -- Common processing for first argument of pragma Interrupt_Handler
350 -- or pragma Attach_Handler.
352 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
353 -- Check that pragma appears in a declarative part, or in a package
354 -- specification, i.e. that it does not occur in a statement sequence
357 procedure Check_No_Identifier (Arg : Node_Id);
358 -- Checks that the given argument does not have an identifier. If
359 -- an identifier is present, then an error message is issued, and
360 -- Pragma_Exit is raised.
362 procedure Check_No_Identifiers;
363 -- Checks that none of the arguments to the pragma has an identifier.
364 -- If any argument has an identifier, then an error message is issued,
365 -- and Pragma_Exit is raised.
367 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
368 -- Checks if the given argument has an identifier, and if so, requires
369 -- it to match the given identifier name. If there is a non-matching
370 -- identifier, then an error message is given and Error_Pragmas raised.
372 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
373 -- Checks if the given argument has an identifier, and if so, requires
374 -- it to match the given identifier name. If there is a non-matching
375 -- identifier, then an error message is given and Error_Pragmas raised.
376 -- In this version of the procedure, the identifier name is given as
377 -- a string with lower case letters.
379 procedure Check_Static_Constraint (Constr : Node_Id);
380 -- Constr is a constraint from an N_Subtype_Indication node from a
381 -- component constraint in an Unchecked_Union type. This routine checks
382 -- that the constraint is static as required by the restrictions for
385 procedure Check_Valid_Configuration_Pragma;
386 -- Legality checks for placement of a configuration pragma
388 procedure Check_Valid_Library_Unit_Pragma;
389 -- Legality checks for library unit pragmas. A special case arises for
390 -- pragmas in generic instances that come from copies of the original
391 -- library unit pragmas in the generic templates. In the case of other
392 -- than library level instantiations these can appear in contexts which
393 -- would normally be invalid (they only apply to the original template
394 -- and to library level instantiations), and they are simply ignored,
395 -- which is implemented by rewriting them as null statements.
397 procedure Check_Variant (Variant : Node_Id);
398 -- Check Unchecked_Union variant for lack of nested variants and
399 -- presence of at least one component.
401 procedure Error_Pragma (Msg : String);
402 pragma No_Return (Error_Pragma);
403 -- Outputs error message for current pragma. The message contains an %
404 -- that will be replaced with the pragma name, and the flag is placed
405 -- on the pragma itself. Pragma_Exit is then raised.
407 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
408 pragma No_Return (Error_Pragma_Arg);
409 -- Outputs error message for current pragma. The message may contain
410 -- a % that will be replaced with the pragma name. The parameter Arg
411 -- may either be a pragma argument association, in which case the flag
412 -- is placed on the expression of this association, or an expression,
413 -- in which case the flag is placed directly on the expression. The
414 -- message is placed using Error_Msg_N, so the message may also contain
415 -- an & insertion character which will reference the given Arg value.
416 -- After placing the message, Pragma_Exit is raised.
418 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
419 pragma No_Return (Error_Pragma_Arg);
420 -- Similar to above form of Error_Pragma_Arg except that two messages
421 -- are provided, the second is a continuation comment starting with \.
423 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
424 pragma No_Return (Error_Pragma_Arg_Ident);
425 -- Outputs error message for current pragma. The message may contain
426 -- a % that will be replaced with the pragma name. The parameter Arg
427 -- must be a pragma argument association with a non-empty identifier
428 -- (i.e. its Chars field must be set), and the error message is placed
429 -- on the identifier. The message is placed using Error_Msg_N so
430 -- the message may also contain an & insertion character which will
431 -- reference the identifier. After placing the message, Pragma_Exit
434 function Find_Lib_Unit_Name return Entity_Id;
435 -- Used for a library unit pragma to find the entity to which the
436 -- library unit pragma applies, returns the entity found.
438 procedure Find_Program_Unit_Name (Id : Node_Id);
439 -- If the pragma is a compilation unit pragma, the id must denote the
440 -- compilation unit in the same compilation, and the pragma must appear
441 -- in the list of preceding or trailing pragmas. If it is a program
442 -- unit pragma that is not a compilation unit pragma, then the
443 -- identifier must be visible.
445 type Name_List is array (Natural range <>) of Name_Id;
446 type Args_List is array (Natural range <>) of Node_Id;
447 procedure Gather_Associations
449 Args : out Args_List);
450 -- This procedure is used to gather the arguments for a pragma that
451 -- permits arbitrary ordering of parameters using the normal rules
452 -- for named and positional parameters. The Names argument is a list
453 -- of Name_Id values that corresponds to the allowed pragma argument
454 -- association identifiers in order. The result returned in Args is
455 -- a list of corresponding expressions that are the pragma arguments.
456 -- Note that this is a list of expressions, not of pragma argument
457 -- associations (Gather_Associations has completely checked all the
458 -- optional identifiers when it returns). An entry in Args is Empty
459 -- on return if the corresponding argument is not present.
461 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
462 -- All the routines that check pragma arguments take either a pragma
463 -- argument association (in which case the expression of the argument
464 -- association is checked), or the expression directly. The function
465 -- Get_Pragma_Arg is a utility used to deal with these two cases. If
466 -- Arg is a pragma argument association node, then its expression is
467 -- returned, otherwise Arg is returned unchanged.
469 procedure GNAT_Pragma;
470 -- Called for all GNAT defined pragmas to note the use of the feature,
471 -- and also check the relevant restriction (No_Implementation_Pragmas).
473 function Is_Before_First_Decl
474 (Pragma_Node : Node_Id;
475 Decls : List_Id) return Boolean;
476 -- Return True if Pragma_Node is before the first declarative item in
477 -- Decls where Decls is the list of declarative items.
479 function Is_Configuration_Pragma return Boolean;
480 -- Deterermines if the placement of the current pragma is appropriate
481 -- for a configuration pragma (precedes the current compilation unit)
483 procedure Pragma_Misplaced;
484 -- Issue fatal error message for misplaced pragma
486 procedure Process_Atomic_Shared_Volatile;
487 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
488 -- Shared is an obsolete Ada 83 pragma, treated as being identical
489 -- in effect to pragma Atomic.
491 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
492 -- Common procesing for Convention, Interface, Import and Export.
493 -- Checks first two arguments of pragma, and sets the appropriate
494 -- convention value in the specified entity or entities. On return
495 -- C is the convention, E is the referenced entity.
497 procedure Process_Extended_Import_Export_Exception_Pragma
498 (Arg_Internal : Node_Id;
499 Arg_External : Node_Id;
502 -- Common processing for the pragmas Import/Export_Exception.
503 -- The three arguments correspond to the three named parameters of
504 -- the pragma. An argument is empty if the corresponding parameter
505 -- is not present in the pragma.
507 procedure Process_Extended_Import_Export_Object_Pragma
508 (Arg_Internal : Node_Id;
509 Arg_External : Node_Id;
511 -- Common processing for the pragmass Import/Export_Object.
512 -- The three arguments correspond to the three named parameters
513 -- of the pragmas. An argument is empty if the corresponding
514 -- parameter is not present in the pragma.
516 procedure Process_Extended_Import_Export_Internal_Arg
517 (Arg_Internal : Node_Id := Empty);
518 -- Common processing for all extended Import and Export pragmas. The
519 -- argument is the pragma parameter for the Internal argument. If
520 -- Arg_Internal is empty or inappropriate, an error message is posted.
521 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
522 -- set to identify the referenced entity.
524 procedure Process_Extended_Import_Export_Subprogram_Pragma
525 (Arg_Internal : Node_Id;
526 Arg_External : Node_Id;
527 Arg_Parameter_Types : Node_Id;
528 Arg_Result_Type : Node_Id := Empty;
529 Arg_Mechanism : Node_Id;
530 Arg_Result_Mechanism : Node_Id := Empty;
531 Arg_First_Optional_Parameter : Node_Id := Empty);
532 -- Common processing for all extended Import and Export pragmas
533 -- applying to subprograms. The caller omits any arguments that do
534 -- bnot apply to the pragma in question (for example, Arg_Result_Type
535 -- can be non-Empty only in the Import_Function and Export_Function
536 -- cases). The argument names correspond to the allowed pragma
537 -- association identifiers.
539 procedure Process_Generic_List;
540 -- Common processing for Share_Generic and Inline_Generic
542 procedure Process_Import_Or_Interface;
543 -- Common processing for Import of Interface
545 procedure Process_Inline (Active : Boolean);
546 -- Common processing for Inline and Inline_Always. The parameter
547 -- indicates if the inline pragma is active, i.e. if it should
548 -- actually cause inlining to occur.
550 procedure Process_Interface_Name
551 (Subprogram_Def : Entity_Id;
554 -- Given the last two arguments of pragma Import, pragma Export, or
555 -- pragma Interface_Name, performs validity checks and sets the
556 -- Interface_Name field of the given subprogram entity to the
557 -- appropriate external or link name, depending on the arguments
558 -- given. Ext_Arg is always present, but Link_Arg may be missing.
559 -- Note that Ext_Arg may represent the Link_Name if Link_Arg is
560 -- missing, and appropriate named notation is used for Ext_Arg.
561 -- If neither Ext_Arg nor Link_Arg is present, the interface name
562 -- is set to the default from the subprogram name.
564 procedure Process_Interrupt_Or_Attach_Handler;
565 -- Common processing for Interrupt and Attach_Handler pragmas
567 procedure Process_Restrictions_Or_Restriction_Warnings;
568 -- Common processing for Restrictions and Restriction_Warnings pragmas
570 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
571 -- Common processing for Suppress and Unsuppress. The boolean parameter
572 -- Suppress_Case is True for the Suppress case, and False for the
575 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
576 -- This procedure sets the Is_Exported flag for the given entity,
577 -- checking that the entity was not previously imported. Arg is
578 -- the argument that specified the entity. A check is also made
579 -- for exporting inappropriate entities.
581 procedure Set_Extended_Import_Export_External_Name
582 (Internal_Ent : Entity_Id;
583 Arg_External : Node_Id);
584 -- Common processing for all extended import export pragmas. The first
585 -- argument, Internal_Ent, is the internal entity, which has already
586 -- been checked for validity by the caller. Arg_External is from the
587 -- Import or Export pragma, and may be null if no External parameter
588 -- was present. If Arg_External is present and is a non-null string
589 -- (a null string is treated as the default), then the Interface_Name
590 -- field of Internal_Ent is set appropriately.
592 procedure Set_Imported (E : Entity_Id);
593 -- This procedure sets the Is_Imported flag for the given entity,
594 -- checking that it is not previously exported or imported.
596 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
597 -- Mech is a parameter passing mechanism (see Import_Function syntax
598 -- for MECHANISM_NAME). This routine checks that the mechanism argument
599 -- has the right form, and if not issues an error message. If the
600 -- argument has the right form then the Mechanism field of Ent is
601 -- set appropriately.
603 procedure Set_Ravenscar_Profile (N : Node_Id);
604 -- Activate the set of configuration pragmas and restrictions that
605 -- make up the Ravenscar Profile. N is the corresponding pragma
606 -- node, which is used for error messages on any constructs
607 -- that violate the profile.
609 --------------------------
610 -- Check_Ada_83_Warning --
611 --------------------------
613 procedure Check_Ada_83_Warning is
615 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
616 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
618 end Check_Ada_83_Warning;
620 ---------------------
621 -- Check_Arg_Count --
622 ---------------------
624 procedure Check_Arg_Count (Required : Nat) is
626 if Arg_Count /= Required then
627 Error_Pragma ("wrong number of arguments for pragma%");
631 --------------------------------
632 -- Check_Arg_Is_External_Name --
633 --------------------------------
635 procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
636 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
639 if Nkind (Argx) = N_Identifier then
643 Analyze_And_Resolve (Argx, Standard_String);
645 if Is_OK_Static_Expression (Argx) then
648 elsif Etype (Argx) = Any_Type then
651 -- An interesting special case, if we have a string literal and
652 -- we are in Ada 83 mode, then we allow it even though it will
653 -- not be flagged as static. This allows expected Ada 83 mode
654 -- use of external names which are string literals, even though
655 -- technically these are not static in Ada 83.
657 elsif Ada_Version = Ada_83
658 and then Nkind (Argx) = N_String_Literal
662 -- Static expression that raises Constraint_Error. This has
663 -- already been flagged, so just exit from pragma processing.
665 elsif Is_Static_Expression (Argx) then
668 -- Here we have a real error (non-static expression)
671 Error_Msg_Name_1 := Chars (N);
673 ("argument for pragma% must be a identifier or " &
674 "static string expression!", Argx);
678 end Check_Arg_Is_External_Name;
680 -----------------------------
681 -- Check_Arg_Is_Identifier --
682 -----------------------------
684 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
685 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
687 if Nkind (Argx) /= N_Identifier then
689 ("argument for pragma% must be identifier", Argx);
691 end Check_Arg_Is_Identifier;
693 ----------------------------------
694 -- Check_Arg_Is_Integer_Literal --
695 ----------------------------------
697 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
698 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
700 if Nkind (Argx) /= N_Integer_Literal then
702 ("argument for pragma% must be integer literal", Argx);
704 end Check_Arg_Is_Integer_Literal;
706 -------------------------------------------
707 -- Check_Arg_Is_Library_Level_Local_Name --
708 -------------------------------------------
712 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
713 -- | library_unit_NAME
715 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
717 Check_Arg_Is_Local_Name (Arg);
719 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
720 and then Comes_From_Source (N)
723 ("argument for pragma% must be library level entity", Arg);
725 end Check_Arg_Is_Library_Level_Local_Name;
727 -----------------------------
728 -- Check_Arg_Is_Local_Name --
729 -----------------------------
733 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
734 -- | library_unit_NAME
736 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
737 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
742 if Nkind (Argx) not in N_Direct_Name
743 and then (Nkind (Argx) /= N_Attribute_Reference
744 or else Present (Expressions (Argx))
745 or else Nkind (Prefix (Argx)) /= N_Identifier)
746 and then (not Is_Entity_Name (Argx)
747 or else not Is_Compilation_Unit (Entity (Argx)))
749 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
752 if Is_Entity_Name (Argx)
753 and then Scope (Entity (Argx)) /= Current_Scope
756 ("pragma% argument must be in same declarative part", Arg);
758 end Check_Arg_Is_Local_Name;
760 ---------------------------------
761 -- Check_Arg_Is_Locking_Policy --
762 ---------------------------------
764 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
765 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
768 Check_Arg_Is_Identifier (Argx);
770 if not Is_Locking_Policy_Name (Chars (Argx)) then
772 ("& is not a valid locking policy name", Argx);
774 end Check_Arg_Is_Locking_Policy;
776 -------------------------
777 -- Check_Arg_Is_One_Of --
778 -------------------------
780 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
781 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
784 Check_Arg_Is_Identifier (Argx);
786 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
787 Error_Msg_Name_2 := N1;
788 Error_Msg_Name_3 := N2;
789 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
791 end Check_Arg_Is_One_Of;
793 procedure Check_Arg_Is_One_Of
795 N1, N2, N3 : Name_Id)
797 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
800 Check_Arg_Is_Identifier (Argx);
802 if Chars (Argx) /= N1
803 and then Chars (Argx) /= N2
804 and then Chars (Argx) /= N3
806 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
808 end Check_Arg_Is_One_Of;
810 ---------------------------------
811 -- Check_Arg_Is_Queuing_Policy --
812 ---------------------------------
814 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
815 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
818 Check_Arg_Is_Identifier (Argx);
820 if not Is_Queuing_Policy_Name (Chars (Argx)) then
822 ("& is not a valid queuing policy name", Argx);
824 end Check_Arg_Is_Queuing_Policy;
826 ------------------------------------
827 -- Check_Arg_Is_Static_Expression --
828 ------------------------------------
830 procedure Check_Arg_Is_Static_Expression
834 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
837 Analyze_And_Resolve (Argx, Typ);
839 if Is_OK_Static_Expression (Argx) then
842 elsif Etype (Argx) = Any_Type then
845 -- An interesting special case, if we have a string literal and
846 -- we are in Ada 83 mode, then we allow it even though it will
847 -- not be flagged as static. This allows the use of Ada 95
848 -- pragmas like Import in Ada 83 mode. They will of course be
849 -- flagged with warnings as usual, but will not cause errors.
851 elsif Ada_Version = Ada_83
852 and then Nkind (Argx) = N_String_Literal
856 -- Static expression that raises Constraint_Error. This has
857 -- already been flagged, so just exit from pragma processing.
859 elsif Is_Static_Expression (Argx) then
862 -- Finally, we have a real error
865 Error_Msg_Name_1 := Chars (N);
867 ("argument for pragma% must be a static expression!", Argx);
870 end Check_Arg_Is_Static_Expression;
872 ---------------------------------
873 -- Check_Arg_Is_String_Literal --
874 ---------------------------------
876 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
877 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
879 if Nkind (Argx) /= N_String_Literal then
881 ("argument for pragma% must be string literal", Argx);
883 end Check_Arg_Is_String_Literal;
885 ------------------------------------------
886 -- Check_Arg_Is_Task_Dispatching_Policy --
887 ------------------------------------------
889 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
890 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
893 Check_Arg_Is_Identifier (Argx);
895 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
897 ("& is not a valid task dispatching policy name", Argx);
899 end Check_Arg_Is_Task_Dispatching_Policy;
901 --------------------------------
902 -- Check_At_Least_N_Arguments --
903 --------------------------------
905 procedure Check_At_Least_N_Arguments (N : Nat) is
907 if Arg_Count < N then
908 Error_Pragma ("too few arguments for pragma%");
910 end Check_At_Least_N_Arguments;
912 -------------------------------
913 -- Check_At_Most_N_Arguments --
914 -------------------------------
916 procedure Check_At_Most_N_Arguments (N : Nat) is
919 if Arg_Count > N then
923 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
926 end Check_At_Most_N_Arguments;
928 ---------------------
929 -- Check_Component --
930 ---------------------
932 procedure Check_Component (Comp : Node_Id) is
934 if Nkind (Comp) = N_Component_Declaration then
936 Sindic : constant Node_Id :=
937 Subtype_Indication (Component_Definition (Comp));
940 if Nkind (Sindic) = N_Subtype_Indication then
942 -- Ada 2005 (AI-216): If a component subtype is subject to
943 -- a per-object constraint, then the component type shall
944 -- be an Unchecked_Union.
946 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
948 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
950 Error_Msg_N ("component subtype subject to per-object" &
951 " constraint must be an Unchecked_Union", Comp);
958 ----------------------------------
959 -- Check_Duplicated_Export_Name --
960 ----------------------------------
962 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
963 String_Val : constant String_Id := Strval (Nam);
966 -- We are only interested in the export case, and in the case of
967 -- generics, it is the instance, not the template, that is the
968 -- problem (the template will generate a warning in any case).
970 if not Inside_A_Generic
971 and then (Prag_Id = Pragma_Export
973 Prag_Id = Pragma_Export_Procedure
975 Prag_Id = Pragma_Export_Valued_Procedure
977 Prag_Id = Pragma_Export_Function)
979 for J in Externals.First .. Externals.Last loop
980 if String_Equal (String_Val, Strval (Externals.Table (J))) then
981 Error_Msg_Sloc := Sloc (Externals.Table (J));
982 Error_Msg_N ("external name duplicates name given#", Nam);
987 Externals.Append (Nam);
989 end Check_Duplicated_Export_Name;
991 -------------------------
992 -- Check_First_Subtype --
993 -------------------------
995 procedure Check_First_Subtype (Arg : Node_Id) is
996 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
998 if not Is_First_Subtype (Entity (Argx)) then
1000 ("pragma% cannot apply to subtype", Argx);
1002 end Check_First_Subtype;
1004 ---------------------------
1005 -- Check_In_Main_Program --
1006 ---------------------------
1008 procedure Check_In_Main_Program is
1009 P : constant Node_Id := Parent (N);
1012 -- Must be at in subprogram body
1014 if Nkind (P) /= N_Subprogram_Body then
1015 Error_Pragma ("% pragma allowed only in subprogram");
1017 -- Otherwise warn if obviously not main program
1019 elsif Present (Parameter_Specifications (Specification (P)))
1020 or else not Is_Compilation_Unit (Defining_Entity (P))
1022 Error_Msg_Name_1 := Chars (N);
1024 ("?pragma% is only effective in main program", N);
1026 end Check_In_Main_Program;
1028 ---------------------------------------
1029 -- Check_Interrupt_Or_Attach_Handler --
1030 ---------------------------------------
1032 procedure Check_Interrupt_Or_Attach_Handler is
1033 Arg1_X : constant Node_Id := Expression (Arg1);
1038 if not Is_Entity_Name (Arg1_X) then
1040 ("argument of pragma% must be entity name", Arg1);
1042 elsif Prag_Id = Pragma_Interrupt_Handler then
1043 Check_Restriction (No_Dynamic_Attachment, N);
1047 Handler_Proc : Entity_Id := Empty;
1048 Proc_Scope : Entity_Id;
1049 Found : Boolean := False;
1052 if not Is_Overloaded (Arg1_X) then
1053 Handler_Proc := Entity (Arg1_X);
1058 Index : Interp_Index;
1061 Get_First_Interp (Arg1_X, Index, It);
1062 while Present (It.Nam) loop
1063 Handler_Proc := It.Nam;
1065 if Ekind (Handler_Proc) = E_Procedure
1066 and then No (First_Formal (Handler_Proc))
1070 Set_Entity (Arg1_X, Handler_Proc);
1071 Set_Is_Overloaded (Arg1_X, False);
1074 ("ambiguous handler name for pragma% ", Arg1);
1078 Get_Next_Interp (Index, It);
1083 ("argument of pragma% must be parameterless procedure",
1086 Handler_Proc := Entity (Arg1_X);
1091 Proc_Scope := Scope (Handler_Proc);
1093 -- On AAMP only, a pragma Interrupt_Handler is supported for
1094 -- nonprotected parameterless procedures.
1097 and then Prag_Id = Pragma_Interrupt_Handler
1099 if Ekind (Handler_Proc) /= E_Procedure then
1101 ("argument of pragma% must be a procedure", Arg1);
1104 elsif Ekind (Handler_Proc) /= E_Procedure
1105 or else Ekind (Proc_Scope) /= E_Protected_Type
1108 ("argument of pragma% must be protected procedure", Arg1);
1111 if (not AAMP_On_Target or else Prag_Id = Pragma_Attach_Handler)
1112 and then Ekind (Proc_Scope) = E_Protected_Type
1115 Protected_Definition (Parent (Proc_Scope))
1117 Error_Pragma ("pragma% must be in protected definition");
1121 if not Is_Library_Level_Entity (Proc_Scope)
1122 or else (AAMP_On_Target
1123 and then not Is_Library_Level_Entity (Handler_Proc))
1126 ("pragma% requires library-level entity", Arg1);
1129 if Present (First_Formal (Handler_Proc)) then
1131 ("argument of pragma% must be parameterless procedure",
1135 end Check_Interrupt_Or_Attach_Handler;
1137 -------------------------------------------
1138 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1139 -------------------------------------------
1141 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1150 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1153 elsif Nkind (P) = N_Package_Specification then
1156 elsif Nkind (P) = N_Block_Statement then
1159 -- Note: the following tests seem a little peculiar, because
1160 -- they test for bodies, but if we were in the statement part
1161 -- of the body, we would already have hit the handled statement
1162 -- sequence, so the only way we get here is by being in the
1163 -- declarative part of the body.
1165 elsif Nkind (P) = N_Subprogram_Body
1166 or else Nkind (P) = N_Package_Body
1167 or else Nkind (P) = N_Task_Body
1168 or else Nkind (P) = N_Entry_Body
1176 Error_Pragma ("pragma% is not in declarative part or package spec");
1177 end Check_Is_In_Decl_Part_Or_Package_Spec;
1179 -------------------------
1180 -- Check_No_Identifier --
1181 -------------------------
1183 procedure Check_No_Identifier (Arg : Node_Id) is
1185 if Chars (Arg) /= No_Name then
1186 Error_Pragma_Arg_Ident
1187 ("pragma% does not permit identifier& here", Arg);
1189 end Check_No_Identifier;
1191 --------------------------
1192 -- Check_No_Identifiers --
1193 --------------------------
1195 procedure Check_No_Identifiers is
1198 if Arg_Count > 0 then
1200 while Present (Arg_Node) loop
1201 Check_No_Identifier (Arg_Node);
1205 end Check_No_Identifiers;
1207 -------------------------------
1208 -- Check_Optional_Identifier --
1209 -------------------------------
1211 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1213 if Present (Arg) and then Chars (Arg) /= No_Name then
1214 if Chars (Arg) /= Id then
1215 Error_Msg_Name_1 := Chars (N);
1216 Error_Msg_Name_2 := Id;
1217 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1221 end Check_Optional_Identifier;
1223 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1225 Name_Buffer (1 .. Id'Length) := Id;
1226 Name_Len := Id'Length;
1227 Check_Optional_Identifier (Arg, Name_Find);
1228 end Check_Optional_Identifier;
1230 -----------------------------
1231 -- Check_Static_Constraint --
1232 -----------------------------
1234 -- Note: for convenience in writing this procedure, in addition to
1235 -- the officially (i.e. by spec) allowed argument which is always
1236 -- a constraint, it also allows ranges and discriminant associations.
1237 -- Above is not clear ???
1239 procedure Check_Static_Constraint (Constr : Node_Id) is
1241 --------------------
1242 -- Require_Static --
1243 --------------------
1245 procedure Require_Static (E : Node_Id);
1246 -- Require given expression to be static expression
1248 procedure Require_Static (E : Node_Id) is
1250 if not Is_OK_Static_Expression (E) then
1251 Flag_Non_Static_Expr
1252 ("non-static constraint not allowed in Unchecked_Union!", E);
1257 -- Start of processing for Check_Static_Constraint
1260 case Nkind (Constr) is
1261 when N_Discriminant_Association =>
1262 Require_Static (Expression (Constr));
1265 Require_Static (Low_Bound (Constr));
1266 Require_Static (High_Bound (Constr));
1268 when N_Attribute_Reference =>
1269 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1270 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1272 when N_Range_Constraint =>
1273 Check_Static_Constraint (Range_Expression (Constr));
1275 when N_Index_Or_Discriminant_Constraint =>
1279 IDC := First (Constraints (Constr));
1280 while Present (IDC) loop
1281 Check_Static_Constraint (IDC);
1289 end Check_Static_Constraint;
1291 --------------------------------------
1292 -- Check_Valid_Configuration_Pragma --
1293 --------------------------------------
1295 -- A configuration pragma must appear in the context clause of
1296 -- a compilation unit, at the start of the list (i.e. only other
1297 -- pragmas may precede it).
1299 procedure Check_Valid_Configuration_Pragma is
1301 if not Is_Configuration_Pragma then
1302 Error_Pragma ("incorrect placement for configuration pragma%");
1304 end Check_Valid_Configuration_Pragma;
1306 -------------------------------------
1307 -- Check_Valid_Library_Unit_Pragma --
1308 -------------------------------------
1310 procedure Check_Valid_Library_Unit_Pragma is
1312 Parent_Node : Node_Id;
1313 Unit_Name : Entity_Id;
1314 Unit_Kind : Node_Kind;
1315 Unit_Node : Node_Id;
1316 Sindex : Source_File_Index;
1319 if not Is_List_Member (N) then
1323 Plist := List_Containing (N);
1324 Parent_Node := Parent (Plist);
1326 if Parent_Node = Empty then
1329 -- Case of pragma appearing after a compilation unit. In this
1330 -- case it must have an argument with the corresponding name
1331 -- and must be part of the following pragmas of its parent.
1333 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1334 if Plist /= Pragmas_After (Parent_Node) then
1337 elsif Arg_Count = 0 then
1339 ("argument required if outside compilation unit");
1342 Check_No_Identifiers;
1343 Check_Arg_Count (1);
1344 Unit_Node := Unit (Parent (Parent_Node));
1345 Unit_Kind := Nkind (Unit_Node);
1347 Analyze (Expression (Arg1));
1349 if Unit_Kind = N_Generic_Subprogram_Declaration
1350 or else Unit_Kind = N_Subprogram_Declaration
1352 Unit_Name := Defining_Entity (Unit_Node);
1354 elsif Unit_Kind = N_Function_Instantiation
1355 or else Unit_Kind = N_Package_Instantiation
1356 or else Unit_Kind = N_Procedure_Instantiation
1358 Unit_Name := Defining_Entity (Unit_Node);
1361 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1364 if Chars (Unit_Name) /=
1365 Chars (Entity (Expression (Arg1)))
1368 ("pragma% argument is not current unit name", Arg1);
1371 if Ekind (Unit_Name) = E_Package
1372 and then Present (Renamed_Entity (Unit_Name))
1374 Error_Pragma ("pragma% not allowed for renamed package");
1378 -- Pragma appears other than after a compilation unit
1381 -- Here we check for the generic instantiation case and also
1382 -- for the case of processing a generic formal package. We
1383 -- detect these cases by noting that the Sloc on the node
1384 -- does not belong to the current compilation unit.
1386 Sindex := Source_Index (Current_Sem_Unit);
1388 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1389 Rewrite (N, Make_Null_Statement (Loc));
1392 -- If before first declaration, the pragma applies to the
1393 -- enclosing unit, and the name if present must be this name.
1395 elsif Is_Before_First_Decl (N, Plist) then
1396 Unit_Node := Unit_Declaration_Node (Current_Scope);
1397 Unit_Kind := Nkind (Unit_Node);
1399 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1402 elsif Unit_Kind = N_Subprogram_Body
1403 and then not Acts_As_Spec (Unit_Node)
1407 elsif Nkind (Parent_Node) = N_Package_Body then
1410 elsif Nkind (Parent_Node) = N_Package_Specification
1411 and then Plist = Private_Declarations (Parent_Node)
1415 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1416 or else Nkind (Parent_Node)
1417 = N_Generic_Subprogram_Declaration)
1418 and then Plist = Generic_Formal_Declarations (Parent_Node)
1422 elsif Arg_Count > 0 then
1423 Analyze (Expression (Arg1));
1425 if Entity (Expression (Arg1)) /= Current_Scope then
1427 ("name in pragma% must be enclosing unit", Arg1);
1430 -- It is legal to have no argument in this context
1436 -- Error if not before first declaration. This is because a
1437 -- library unit pragma argument must be the name of a library
1438 -- unit (RM 10.1.5(7)), but the only names permitted in this
1439 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1440 -- generic subprogram declarations or generic instantiations.
1444 ("pragma% misplaced, must be before first declaration");
1448 end Check_Valid_Library_Unit_Pragma;
1454 procedure Check_Variant (Variant : Node_Id) is
1455 Clist : constant Node_Id := Component_List (Variant);
1459 if Present (Variant_Part (Clist)) then
1461 ("Unchecked_Union may not have nested variants",
1462 Variant_Part (Clist));
1465 if not Is_Non_Empty_List (Component_Items (Clist)) then
1467 ("Unchecked_Union may not have empty component list",
1472 Comp := First (Component_Items (Clist));
1473 while Present (Comp) loop
1474 Check_Component (Comp);
1483 procedure Error_Pragma (Msg : String) is
1485 Error_Msg_Name_1 := Chars (N);
1486 Error_Msg_N (Msg, N);
1490 ----------------------
1491 -- Error_Pragma_Arg --
1492 ----------------------
1494 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1496 Error_Msg_Name_1 := Chars (N);
1497 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1499 end Error_Pragma_Arg;
1501 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1503 Error_Msg_Name_1 := Chars (N);
1504 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1505 Error_Pragma_Arg (Msg2, Arg);
1506 end Error_Pragma_Arg;
1508 ----------------------------
1509 -- Error_Pragma_Arg_Ident --
1510 ----------------------------
1512 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1514 Error_Msg_Name_1 := Chars (N);
1515 Error_Msg_N (Msg, Arg);
1517 end Error_Pragma_Arg_Ident;
1519 ------------------------
1520 -- Find_Lib_Unit_Name --
1521 ------------------------
1523 function Find_Lib_Unit_Name return Entity_Id is
1525 -- Return inner compilation unit entity, for case of nested
1526 -- categorization pragmas. This happens in generic unit.
1528 if Nkind (Parent (N)) = N_Package_Specification
1529 and then Defining_Entity (Parent (N)) /= Current_Scope
1531 return Defining_Entity (Parent (N));
1533 return Current_Scope;
1535 end Find_Lib_Unit_Name;
1537 ----------------------------
1538 -- Find_Program_Unit_Name --
1539 ----------------------------
1541 procedure Find_Program_Unit_Name (Id : Node_Id) is
1542 Unit_Name : Entity_Id;
1543 Unit_Kind : Node_Kind;
1544 P : constant Node_Id := Parent (N);
1547 if Nkind (P) = N_Compilation_Unit then
1548 Unit_Kind := Nkind (Unit (P));
1550 if Unit_Kind = N_Subprogram_Declaration
1551 or else Unit_Kind = N_Package_Declaration
1552 or else Unit_Kind in N_Generic_Declaration
1554 Unit_Name := Defining_Entity (Unit (P));
1556 if Chars (Id) = Chars (Unit_Name) then
1557 Set_Entity (Id, Unit_Name);
1558 Set_Etype (Id, Etype (Unit_Name));
1560 Set_Etype (Id, Any_Type);
1562 ("cannot find program unit referenced by pragma%");
1566 Set_Etype (Id, Any_Type);
1567 Error_Pragma ("pragma% inapplicable to this unit");
1574 end Find_Program_Unit_Name;
1576 -------------------------
1577 -- Gather_Associations --
1578 -------------------------
1580 procedure Gather_Associations
1582 Args : out Args_List)
1587 -- Initialize all parameters to Empty
1589 for J in Args'Range loop
1593 -- That's all we have to do if there are no argument associations
1595 if No (Pragma_Argument_Associations (N)) then
1599 -- Otherwise first deal with any positional parameters present
1601 Arg := First (Pragma_Argument_Associations (N));
1602 for Index in Args'Range loop
1603 exit when No (Arg) or else Chars (Arg) /= No_Name;
1604 Args (Index) := Expression (Arg);
1608 -- Positional parameters all processed, if any left, then we
1609 -- have too many positional parameters.
1611 if Present (Arg) and then Chars (Arg) = No_Name then
1613 ("too many positional associations for pragma%", Arg);
1616 -- Process named parameters if any are present
1618 while Present (Arg) loop
1619 if Chars (Arg) = No_Name then
1621 ("positional association cannot follow named association",
1625 for Index in Names'Range loop
1626 if Names (Index) = Chars (Arg) then
1627 if Present (Args (Index)) then
1629 ("duplicate argument association for pragma%", Arg);
1631 Args (Index) := Expression (Arg);
1636 if Index = Names'Last then
1637 Error_Msg_Name_1 := Chars (N);
1638 Error_Msg_N ("pragma% does not allow & argument", Arg);
1640 -- Check for possible misspelling
1642 for Index1 in Names'Range loop
1643 if Is_Bad_Spelling_Of
1644 (Get_Name_String (Chars (Arg)),
1645 Get_Name_String (Names (Index1)))
1647 Error_Msg_Name_1 := Names (Index1);
1648 Error_Msg_N ("\possible misspelling of%", Arg);
1660 end Gather_Associations;
1662 --------------------
1663 -- Get_Pragma_Arg --
1664 --------------------
1666 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
1668 if Nkind (Arg) = N_Pragma_Argument_Association then
1669 return Expression (Arg);
1679 procedure GNAT_Pragma is
1681 Check_Restriction (No_Implementation_Pragmas, N);
1684 --------------------------
1685 -- Is_Before_First_Decl --
1686 --------------------------
1688 function Is_Before_First_Decl
1689 (Pragma_Node : Node_Id;
1690 Decls : List_Id) return Boolean
1692 Item : Node_Id := First (Decls);
1695 -- Only other pragmas can come before this pragma
1698 if No (Item) or else Nkind (Item) /= N_Pragma then
1701 elsif Item = Pragma_Node then
1707 end Is_Before_First_Decl;
1709 -----------------------------
1710 -- Is_Configuration_Pragma --
1711 -----------------------------
1713 -- A configuration pragma must appear in the context clause of
1714 -- a compilation unit, at the start of the list (i.e. only other
1715 -- pragmas may precede it).
1717 function Is_Configuration_Pragma return Boolean is
1718 Lis : constant List_Id := List_Containing (N);
1719 Par : constant Node_Id := Parent (N);
1723 -- If no parent, then we are in the configuration pragma file,
1724 -- so the placement is definitely appropriate.
1729 -- Otherwise we must be in the context clause of a compilation unit
1730 -- and the only thing allowed before us in the context list is more
1731 -- configuration pragmas.
1733 elsif Nkind (Par) = N_Compilation_Unit
1734 and then Context_Items (Par) = Lis
1741 elsif Nkind (Prg) /= N_Pragma then
1751 end Is_Configuration_Pragma;
1753 ----------------------
1754 -- Pragma_Misplaced --
1755 ----------------------
1757 procedure Pragma_Misplaced is
1759 Error_Pragma ("incorrect placement of pragma%");
1760 end Pragma_Misplaced;
1762 ------------------------------------
1763 -- Process Atomic_Shared_Volatile --
1764 ------------------------------------
1766 procedure Process_Atomic_Shared_Volatile is
1773 procedure Set_Atomic (E : Entity_Id);
1774 -- Set given type as atomic, and if no explicit alignment was
1775 -- given, set alignment to unknown, since back end knows what
1776 -- the alignment requirements are for atomic arrays. Note that
1777 -- this step is necessary for derived types.
1783 procedure Set_Atomic (E : Entity_Id) is
1787 if not Has_Alignment_Clause (E) then
1788 Set_Alignment (E, Uint_0);
1792 -- Start of processing for Process_Atomic_Shared_Volatile
1795 Check_Ada_83_Warning;
1796 Check_No_Identifiers;
1797 Check_Arg_Count (1);
1798 Check_Arg_Is_Local_Name (Arg1);
1799 E_Id := Expression (Arg1);
1801 if Etype (E_Id) = Any_Type then
1806 D := Declaration_Node (E);
1810 if Rep_Item_Too_Early (E, N)
1812 Rep_Item_Too_Late (E, N)
1816 Check_First_Subtype (Arg1);
1819 if Prag_Id /= Pragma_Volatile then
1821 Set_Atomic (Underlying_Type (E));
1822 Set_Atomic (Base_Type (E));
1825 -- Attribute belongs on the base type. If the
1826 -- view of the type is currently private, it also
1827 -- belongs on the underlying type.
1829 Set_Is_Volatile (Base_Type (E));
1830 Set_Is_Volatile (Underlying_Type (E));
1832 Set_Treat_As_Volatile (E);
1833 Set_Treat_As_Volatile (Underlying_Type (E));
1835 elsif K = N_Object_Declaration
1836 or else (K = N_Component_Declaration
1837 and then Original_Record_Component (E) = E)
1839 if Rep_Item_Too_Late (E, N) then
1843 if Prag_Id /= Pragma_Volatile then
1846 -- If the object declaration has an explicit
1847 -- initialization, a temporary may have to be
1848 -- created to hold the expression, to insure
1849 -- that access to the object remain atomic.
1851 if Nkind (Parent (E)) = N_Object_Declaration
1852 and then Present (Expression (Parent (E)))
1854 Set_Has_Delayed_Freeze (E);
1857 -- An interesting improvement here. If an object of type X
1858 -- is declared atomic, and the type X is not atomic, that's
1859 -- a pity, since it may not have appropraite alignment etc.
1860 -- We can rescue this in the special case where the object
1861 -- and type are in the same unit by just setting the type
1862 -- as atomic, so that the back end will process it as atomic.
1864 Utyp := Underlying_Type (Etype (E));
1867 and then Sloc (E) > No_Location
1868 and then Sloc (Utyp) > No_Location
1870 Get_Source_File_Index (Sloc (E)) =
1871 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
1873 Set_Is_Atomic (Underlying_Type (Etype (E)));
1877 Set_Is_Volatile (E);
1878 Set_Treat_As_Volatile (E);
1882 ("inappropriate entity for pragma%", Arg1);
1884 end Process_Atomic_Shared_Volatile;
1886 ------------------------
1887 -- Process_Convention --
1888 ------------------------
1890 procedure Process_Convention
1891 (C : out Convention_Id;
1897 Comp_Unit : Unit_Number_Type;
1899 procedure Set_Convention_From_Pragma (E : Entity_Id);
1900 -- Set convention in entity E, and also flag that the entity has a
1901 -- convention pragma. If entity is for a private or incomplete type,
1902 -- also set convention and flag on underlying type. This procedure
1903 -- also deals with the special case of C_Pass_By_Copy convention.
1905 --------------------------------
1906 -- Set_Convention_From_Pragma --
1907 --------------------------------
1909 procedure Set_Convention_From_Pragma (E : Entity_Id) is
1911 Set_Convention (E, C);
1912 Set_Has_Convention_Pragma (E);
1914 if Is_Incomplete_Or_Private_Type (E) then
1915 Set_Convention (Underlying_Type (E), C);
1916 Set_Has_Convention_Pragma (Underlying_Type (E), True);
1919 -- A class-wide type should inherit the convention of
1920 -- the specific root type (although this isn't specified
1921 -- clearly by the RM).
1923 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
1924 Set_Convention (Class_Wide_Type (E), C);
1927 -- If the entity is a record type, then check for special case
1928 -- of C_Pass_By_Copy, which is treated the same as C except that
1929 -- the special record flag is set. This convention is also only
1930 -- permitted on record types (see AI95-00131).
1932 if Cname = Name_C_Pass_By_Copy then
1933 if Is_Record_Type (E) then
1934 Set_C_Pass_By_Copy (Base_Type (E));
1935 elsif Is_Incomplete_Or_Private_Type (E)
1936 and then Is_Record_Type (Underlying_Type (E))
1938 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
1941 ("C_Pass_By_Copy convention allowed only for record type",
1946 -- If the entity is a derived boolean type, check for the
1947 -- special case of convention C, C++, or Fortran, where we
1948 -- consider any nonzero value to represent true.
1950 if Is_Discrete_Type (E)
1951 and then Root_Type (Etype (E)) = Standard_Boolean
1957 C = Convention_Fortran)
1959 Set_Nonzero_Is_True (Base_Type (E));
1961 end Set_Convention_From_Pragma;
1963 -- Start of processing for Process_Convention
1966 Check_At_Least_N_Arguments (2);
1967 Check_Arg_Is_Identifier (Arg1);
1968 Check_Optional_Identifier (Arg1, Name_Convention);
1969 Cname := Chars (Expression (Arg1));
1971 -- C_Pass_By_Copy is treated as a synonym for convention C
1972 -- (this is tested again below to set the critical flag)
1974 if Cname = Name_C_Pass_By_Copy then
1977 -- Otherwise we must have something in the standard convention list
1979 elsif Is_Convention_Name (Cname) then
1980 C := Get_Convention_Id (Chars (Expression (Arg1)));
1982 -- In DEC VMS, it seems that there is an undocumented feature
1983 -- that any unrecognized convention is treated as the default,
1984 -- which for us is convention C. It does not seem so terrible
1985 -- to do this unconditionally, silently in the VMS case, and
1986 -- with a warning in the non-VMS case.
1989 if Warn_On_Export_Import and not OpenVMS_On_Target then
1991 ("?unrecognized convention name, C assumed",
1998 Check_Arg_Is_Local_Name (Arg2);
1999 Check_Optional_Identifier (Arg2, Name_Entity);
2001 Id := Expression (Arg2);
2004 if not Is_Entity_Name (Id) then
2005 Error_Pragma_Arg ("entity name required", Arg2);
2010 -- Go to renamed subprogram if present, since convention applies
2011 -- to the actual renamed entity, not to the renaming entity.
2012 -- If subprogram is inherited, go to parent subprogram.
2014 if Is_Subprogram (E)
2015 and then Present (Alias (E))
2017 if Nkind (Parent (Declaration_Node (E)))
2018 = N_Subprogram_Renaming_Declaration
2022 elsif Nkind (Parent (E)) = N_Full_Type_Declaration
2023 and then Scope (E) = Scope (Alias (E))
2029 -- Check that we are not applying this to a specless body
2031 if Is_Subprogram (E)
2032 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2035 ("pragma% requires separate spec and must come before body");
2038 -- Check that we are not applying this to a named constant
2040 if Ekind (E) = E_Named_Integer
2042 Ekind (E) = E_Named_Real
2044 Error_Msg_Name_1 := Chars (N);
2046 ("cannot apply pragma% to named constant!",
2047 Get_Pragma_Arg (Arg2));
2049 ("\supply appropriate type for&!", Arg2);
2052 if Etype (E) = Any_Type
2053 or else Rep_Item_Too_Early (E, N)
2057 E := Underlying_Type (E);
2060 if Rep_Item_Too_Late (E, N) then
2064 if Has_Convention_Pragma (E) then
2066 ("at most one Convention/Export/Import pragma is allowed", Arg2);
2068 elsif Convention (E) = Convention_Protected
2069 or else Ekind (Scope (E)) = E_Protected_Type
2072 ("a protected operation cannot be given a different convention",
2076 -- For Intrinsic, a subprogram is required
2078 if C = Convention_Intrinsic
2079 and then not Is_Subprogram (E)
2080 and then not Is_Generic_Subprogram (E)
2083 ("second argument of pragma% must be a subprogram", Arg2);
2086 -- For Stdcall, a subprogram, variable or subprogram type is required
2088 if C = Convention_Stdcall
2089 and then not Is_Subprogram (E)
2090 and then not Is_Generic_Subprogram (E)
2091 and then Ekind (E) /= E_Variable
2094 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2097 ("second argument of pragma% must be subprogram (type)",
2101 if not Is_Subprogram (E)
2102 and then not Is_Generic_Subprogram (E)
2104 Set_Convention_From_Pragma (E);
2108 Check_First_Subtype (Arg2);
2109 Set_Convention_From_Pragma (Base_Type (E));
2111 -- For subprograms, we must set the convention on the
2112 -- internally generated directly designated type as well.
2114 if Ekind (E) = E_Access_Subprogram_Type then
2115 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2119 -- For the subprogram case, set proper convention for all homonyms
2120 -- in same scope and the same declarative part, i.e. the same
2121 -- compilation unit.
2124 Comp_Unit := Get_Source_Unit (E);
2125 Set_Convention_From_Pragma (E);
2127 -- Treat a pragma Import as an implicit body, for GPS use.
2129 if Prag_Id = Pragma_Import then
2130 Generate_Reference (E, Id, 'b');
2136 exit when No (E1) or else Scope (E1) /= Current_Scope;
2138 -- Note: below we are missing a check for Rep_Item_Too_Late.
2139 -- That is deliberate, we cannot chain the rep item on more
2140 -- than one Rep_Item chain, to be fixed later ???
2142 if Comes_From_Source (E1)
2143 and then Comp_Unit = Get_Source_Unit (E1)
2144 and then Nkind (Original_Node (Parent (E1))) /=
2145 N_Full_Type_Declaration
2147 Set_Convention_From_Pragma (E1);
2149 if Prag_Id = Pragma_Import then
2150 Generate_Reference (E, Id, 'b');
2155 end Process_Convention;
2157 -----------------------------------------------------
2158 -- Process_Extended_Import_Export_Exception_Pragma --
2159 -----------------------------------------------------
2161 procedure Process_Extended_Import_Export_Exception_Pragma
2162 (Arg_Internal : Node_Id;
2163 Arg_External : Node_Id;
2173 if not OpenVMS_On_Target then
2175 ("?pragma% ignored (applies only to Open'V'M'S)");
2178 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2179 Def_Id := Entity (Arg_Internal);
2181 if Ekind (Def_Id) /= E_Exception then
2183 ("pragma% must refer to declared exception", Arg_Internal);
2186 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2188 if Present (Arg_Form) then
2189 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2192 if Present (Arg_Form)
2193 and then Chars (Arg_Form) = Name_Ada
2197 Set_Is_VMS_Exception (Def_Id);
2198 Set_Exception_Code (Def_Id, No_Uint);
2201 if Present (Arg_Code) then
2202 if not Is_VMS_Exception (Def_Id) then
2204 ("Code option for pragma% not allowed for Ada case",
2208 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2209 Code_Val := Expr_Value (Arg_Code);
2211 if not UI_Is_In_Int_Range (Code_Val) then
2213 ("Code option for pragma% must be in 32-bit range",
2217 Set_Exception_Code (Def_Id, Code_Val);
2220 end Process_Extended_Import_Export_Exception_Pragma;
2222 -------------------------------------------------
2223 -- Process_Extended_Import_Export_Internal_Arg --
2224 -------------------------------------------------
2226 procedure Process_Extended_Import_Export_Internal_Arg
2227 (Arg_Internal : Node_Id := Empty)
2232 if No (Arg_Internal) then
2233 Error_Pragma ("Internal parameter required for pragma%");
2236 if Nkind (Arg_Internal) = N_Identifier then
2239 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2240 and then (Prag_Id = Pragma_Import_Function
2242 Prag_Id = Pragma_Export_Function)
2248 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2251 Check_Arg_Is_Local_Name (Arg_Internal);
2252 end Process_Extended_Import_Export_Internal_Arg;
2254 --------------------------------------------------
2255 -- Process_Extended_Import_Export_Object_Pragma --
2256 --------------------------------------------------
2258 procedure Process_Extended_Import_Export_Object_Pragma
2259 (Arg_Internal : Node_Id;
2260 Arg_External : Node_Id;
2266 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2267 Def_Id := Entity (Arg_Internal);
2269 if Ekind (Def_Id) /= E_Constant
2270 and then Ekind (Def_Id) /= E_Variable
2273 ("pragma% must designate an object", Arg_Internal);
2276 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2278 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2281 ("previous Common/Psect_Object applies, pragma % not permitted",
2285 if Rep_Item_Too_Late (Def_Id, N) then
2289 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2291 if Present (Arg_Size) then
2292 Check_Arg_Is_External_Name (Arg_Size);
2295 -- Export_Object case
2297 if Prag_Id = Pragma_Export_Object then
2298 if not Is_Library_Level_Entity (Def_Id) then
2300 ("argument for pragma% must be library level entity",
2304 if Ekind (Current_Scope) = E_Generic_Package then
2305 Error_Pragma ("pragma& cannot appear in a generic unit");
2308 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2310 ("exported object must have compile time known size",
2314 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2316 ("?duplicate Export_Object pragma", N);
2318 Set_Exported (Def_Id, Arg_Internal);
2321 -- Import_Object case
2324 if Is_Concurrent_Type (Etype (Def_Id)) then
2326 ("cannot use pragma% for task/protected object",
2330 if Ekind (Def_Id) = E_Constant then
2332 ("cannot import a constant", Arg_Internal);
2335 if Warn_On_Export_Import
2336 and then Has_Discriminants (Etype (Def_Id))
2339 ("imported value must be initialized?", Arg_Internal);
2342 if Warn_On_Export_Import
2343 and then Is_Access_Type (Etype (Def_Id))
2346 ("cannot import object of an access type?", Arg_Internal);
2349 if Warn_On_Export_Import
2350 and then Is_Imported (Def_Id)
2353 ("?duplicate Import_Object pragma", N);
2355 -- Check for explicit initialization present. Note that an
2356 -- initialization that generated by the code generator, e.g.
2357 -- for an access type, does not count here.
2359 elsif Present (Expression (Parent (Def_Id)))
2362 (Original_Node (Expression (Parent (Def_Id))))
2364 Error_Msg_Sloc := Sloc (Def_Id);
2366 ("no initialization allowed for declaration of& #",
2367 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2370 Set_Imported (Def_Id);
2371 Note_Possible_Modification (Arg_Internal);
2374 end Process_Extended_Import_Export_Object_Pragma;
2376 ------------------------------------------------------
2377 -- Process_Extended_Import_Export_Subprogram_Pragma --
2378 ------------------------------------------------------
2380 procedure Process_Extended_Import_Export_Subprogram_Pragma
2381 (Arg_Internal : Node_Id;
2382 Arg_External : Node_Id;
2383 Arg_Parameter_Types : Node_Id;
2384 Arg_Result_Type : Node_Id := Empty;
2385 Arg_Mechanism : Node_Id;
2386 Arg_Result_Mechanism : Node_Id := Empty;
2387 Arg_First_Optional_Parameter : Node_Id := Empty)
2393 Ambiguous : Boolean;
2397 function Same_Base_Type
2399 Formal : Entity_Id) return Boolean;
2400 -- Determines if Ptype references the type of Formal. Note that
2401 -- only the base types need to match according to the spec. Ptype
2402 -- here is the argument from the pragma, which is either a type
2403 -- name, or an access attribute.
2405 --------------------
2406 -- Same_Base_Type --
2407 --------------------
2409 function Same_Base_Type
2411 Formal : Entity_Id) return Boolean
2413 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2417 -- Case where pragma argument is typ'Access
2419 if Nkind (Ptype) = N_Attribute_Reference
2420 and then Attribute_Name (Ptype) = Name_Access
2422 Pref := Prefix (Ptype);
2425 if not Is_Entity_Name (Pref)
2426 or else Entity (Pref) = Any_Type
2431 -- We have a match if the corresponding argument is of an
2432 -- anonymous access type, and its designicated type matches
2433 -- the type of the prefix of the access attribute
2435 return Ekind (Ftyp) = E_Anonymous_Access_Type
2436 and then Base_Type (Entity (Pref)) =
2437 Base_Type (Etype (Designated_Type (Ftyp)));
2439 -- Case where pragma argument is a type name
2444 if not Is_Entity_Name (Ptype)
2445 or else Entity (Ptype) = Any_Type
2450 -- We have a match if the corresponding argument is of
2451 -- the type given in the pragma (comparing base types)
2453 return Base_Type (Entity (Ptype)) = Ftyp;
2457 -- Start of processing for
2458 -- Process_Extended_Import_Export_Subprogram_Pragma
2461 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2465 -- Loop through homonyms (overloadings) of the entity
2467 Hom_Id := Entity (Arg_Internal);
2468 while Present (Hom_Id) loop
2469 Def_Id := Get_Base_Subprogram (Hom_Id);
2471 -- We need a subprogram in the current scope
2473 if not Is_Subprogram (Def_Id)
2474 or else Scope (Def_Id) /= Current_Scope
2481 -- Pragma cannot apply to subprogram body
2483 if Is_Subprogram (Def_Id)
2486 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2489 ("pragma% requires separate spec"
2490 & " and must come before body");
2493 -- Test result type if given, note that the result type
2494 -- parameter can only be present for the function cases.
2496 if Present (Arg_Result_Type)
2497 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2501 elsif Etype (Def_Id) /= Standard_Void_Type
2503 (Chars (N) = Name_Export_Procedure
2504 or else Chars (N) = Name_Import_Procedure)
2508 -- Test parameter types if given. Note that this parameter
2509 -- has not been analyzed (and must not be, since it is
2510 -- semantic nonsense), so we get it as the parser left it.
2512 elsif Present (Arg_Parameter_Types) then
2513 Check_Matching_Types : declare
2518 Formal := First_Formal (Def_Id);
2520 if Nkind (Arg_Parameter_Types) = N_Null then
2521 if Present (Formal) then
2525 -- A list of one type, e.g. (List) is parsed as
2526 -- a parenthesized expression.
2528 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2529 and then Paren_Count (Arg_Parameter_Types) = 1
2532 or else Present (Next_Formal (Formal))
2537 Same_Base_Type (Arg_Parameter_Types, Formal);
2540 -- A list of more than one type is parsed as a aggregate
2542 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2543 and then Paren_Count (Arg_Parameter_Types) = 0
2545 Ptype := First (Expressions (Arg_Parameter_Types));
2546 while Present (Ptype) or else Present (Formal) loop
2549 or else not Same_Base_Type (Ptype, Formal)
2554 Next_Formal (Formal);
2559 -- Anything else is of the wrong form
2563 ("wrong form for Parameter_Types parameter",
2564 Arg_Parameter_Types);
2566 end Check_Matching_Types;
2569 -- Match is now False if the entry we found did not match
2570 -- either a supplied Parameter_Types or Result_Types argument
2576 -- Ambiguous case, the flag Ambiguous shows if we already
2577 -- detected this and output the initial messages.
2580 if not Ambiguous then
2582 Error_Msg_Name_1 := Chars (N);
2584 ("pragma% does not uniquely identify subprogram!",
2586 Error_Msg_Sloc := Sloc (Ent);
2587 Error_Msg_N ("matching subprogram #!", N);
2591 Error_Msg_Sloc := Sloc (Def_Id);
2592 Error_Msg_N ("matching subprogram #!", N);
2597 Hom_Id := Homonym (Hom_Id);
2600 -- See if we found an entry
2603 if not Ambiguous then
2604 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
2606 ("pragma% cannot be given for generic subprogram");
2610 ("pragma% does not identify local subprogram");
2617 -- Import pragmas must be be for imported entities
2619 if Prag_Id = Pragma_Import_Function
2621 Prag_Id = Pragma_Import_Procedure
2623 Prag_Id = Pragma_Import_Valued_Procedure
2625 if not Is_Imported (Ent) then
2627 ("pragma Import or Interface must precede pragma%");
2630 -- Here we have the Export case which can set the entity as exported
2632 -- But does not do so if the specified external name is null,
2633 -- since that is taken as a signal in DEC Ada 83 (with which
2634 -- we want to be compatible) to request no external name.
2636 elsif Nkind (Arg_External) = N_String_Literal
2637 and then String_Length (Strval (Arg_External)) = 0
2641 -- In all other cases, set entit as exported
2644 Set_Exported (Ent, Arg_Internal);
2647 -- Special processing for Valued_Procedure cases
2649 if Prag_Id = Pragma_Import_Valued_Procedure
2651 Prag_Id = Pragma_Export_Valued_Procedure
2653 Formal := First_Formal (Ent);
2657 ("at least one parameter required for pragma%");
2659 elsif Ekind (Formal) /= E_Out_Parameter then
2661 ("first parameter must have mode out for pragma%");
2664 Set_Is_Valued_Procedure (Ent);
2668 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
2670 -- Process Result_Mechanism argument if present. We have already
2671 -- checked that this is only allowed for the function case.
2673 if Present (Arg_Result_Mechanism) then
2674 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
2677 -- Process Mechanism parameter if present. Note that this parameter
2678 -- is not analyzed, and must not be analyzed since it is semantic
2679 -- nonsense, so we get it in exactly as the parser left it.
2681 if Present (Arg_Mechanism) then
2689 -- A single mechanism association without a formal parameter
2690 -- name is parsed as a parenthesized expression. All other
2691 -- cases are parsed as aggregates, so we rewrite the single
2692 -- parameter case as an aggregate for consistency.
2694 if Nkind (Arg_Mechanism) /= N_Aggregate
2695 and then Paren_Count (Arg_Mechanism) = 1
2697 Rewrite (Arg_Mechanism,
2698 Make_Aggregate (Sloc (Arg_Mechanism),
2699 Expressions => New_List (
2700 Relocate_Node (Arg_Mechanism))));
2703 -- Case of only mechanism name given, applies to all formals
2705 if Nkind (Arg_Mechanism) /= N_Aggregate then
2706 Formal := First_Formal (Ent);
2707 while Present (Formal) loop
2708 Set_Mechanism_Value (Formal, Arg_Mechanism);
2709 Next_Formal (Formal);
2712 -- Case of list of mechanism associations given
2715 if Null_Record_Present (Arg_Mechanism) then
2717 ("inappropriate form for Mechanism parameter",
2721 -- Deal with positional ones first
2723 Formal := First_Formal (Ent);
2725 if Present (Expressions (Arg_Mechanism)) then
2726 Mname := First (Expressions (Arg_Mechanism));
2728 while Present (Mname) loop
2731 ("too many mechanism associations", Mname);
2734 Set_Mechanism_Value (Formal, Mname);
2735 Next_Formal (Formal);
2740 -- Deal with named entries
2742 if Present (Component_Associations (Arg_Mechanism)) then
2743 Massoc := First (Component_Associations (Arg_Mechanism));
2745 while Present (Massoc) loop
2746 Choice := First (Choices (Massoc));
2748 if Nkind (Choice) /= N_Identifier
2749 or else Present (Next (Choice))
2752 ("incorrect form for mechanism association",
2756 Formal := First_Formal (Ent);
2760 ("parameter name & not present", Choice);
2763 if Chars (Choice) = Chars (Formal) then
2765 (Formal, Expression (Massoc));
2769 Next_Formal (Formal);
2779 -- Process First_Optional_Parameter argument if present. We have
2780 -- already checked that this is only allowed for the Import case.
2782 if Present (Arg_First_Optional_Parameter) then
2783 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
2785 ("first optional parameter must be formal parameter name",
2786 Arg_First_Optional_Parameter);
2789 Formal := First_Formal (Ent);
2793 ("specified formal parameter& not found",
2794 Arg_First_Optional_Parameter);
2797 exit when Chars (Formal) =
2798 Chars (Arg_First_Optional_Parameter);
2800 Next_Formal (Formal);
2803 Set_First_Optional_Parameter (Ent, Formal);
2805 -- Check specified and all remaining formals have right form
2807 while Present (Formal) loop
2808 if Ekind (Formal) /= E_In_Parameter then
2810 ("optional formal& is not of mode in!",
2811 Arg_First_Optional_Parameter, Formal);
2814 Dval := Default_Value (Formal);
2816 if not Present (Dval) then
2818 ("optional formal& does not have default value!",
2819 Arg_First_Optional_Parameter, Formal);
2821 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
2826 ("default value for optional formal& is non-static!",
2827 Arg_First_Optional_Parameter, Formal);
2831 Set_Is_Optional_Parameter (Formal);
2832 Next_Formal (Formal);
2835 end Process_Extended_Import_Export_Subprogram_Pragma;
2837 --------------------------
2838 -- Process_Generic_List --
2839 --------------------------
2841 procedure Process_Generic_List is
2847 Check_No_Identifiers;
2848 Check_At_Least_N_Arguments (1);
2851 while Present (Arg) loop
2852 Exp := Expression (Arg);
2855 if not Is_Entity_Name (Exp)
2857 (not Is_Generic_Instance (Entity (Exp))
2859 not Is_Generic_Unit (Entity (Exp)))
2862 ("pragma% argument must be name of generic unit/instance",
2868 end Process_Generic_List;
2870 ---------------------------------
2871 -- Process_Import_Or_Interface --
2872 ---------------------------------
2874 procedure Process_Import_Or_Interface is
2880 Process_Convention (C, Def_Id);
2881 Kill_Size_Check_Code (Def_Id);
2882 Note_Possible_Modification (Expression (Arg2));
2884 if Ekind (Def_Id) = E_Variable
2886 Ekind (Def_Id) = E_Constant
2888 -- User initialization is not allowed for imported object, but
2889 -- the object declaration may contain a default initialization,
2890 -- that will be discarded. Note that an explicit initialization
2891 -- only counts if it comes from source, otherwise it is simply
2892 -- the code generator making an implicit initialization explicit.
2894 if Present (Expression (Parent (Def_Id)))
2895 and then Comes_From_Source (Expression (Parent (Def_Id)))
2897 Error_Msg_Sloc := Sloc (Def_Id);
2899 ("no initialization allowed for declaration of& #",
2900 "\imported entities cannot be initialized ('R'M' 'B.1(24))",
2904 Set_Imported (Def_Id);
2905 Process_Interface_Name (Def_Id, Arg3, Arg4);
2907 -- Note that we do not set Is_Public here. That's because we
2908 -- only want to set if if there is no address clause, and we
2909 -- don't know that yet, so we delay that processing till
2912 -- pragma Import completes deferred constants
2914 if Ekind (Def_Id) = E_Constant then
2915 Set_Has_Completion (Def_Id);
2918 -- It is not possible to import a constant of an unconstrained
2919 -- array type (e.g. string) because there is no simple way to
2920 -- write a meaningful subtype for it.
2922 if Is_Array_Type (Etype (Def_Id))
2923 and then not Is_Constrained (Etype (Def_Id))
2926 ("imported constant& must have a constrained subtype",
2931 elsif Is_Subprogram (Def_Id)
2932 or else Is_Generic_Subprogram (Def_Id)
2934 -- If the name is overloaded, pragma applies to all of the
2935 -- denoted entities in the same declarative part.
2938 while Present (Hom_Id) loop
2939 Def_Id := Get_Base_Subprogram (Hom_Id);
2941 -- Ignore inherited subprograms because the pragma will
2942 -- apply to the parent operation, which is the one called.
2944 if Is_Overloadable (Def_Id)
2945 and then Present (Alias (Def_Id))
2949 -- If it is not a subprogram, it must be in an outer
2950 -- scope and pragma does not apply.
2952 elsif not Is_Subprogram (Def_Id)
2953 and then not Is_Generic_Subprogram (Def_Id)
2957 -- Verify that the homonym is in the same declarative
2958 -- part (not just the same scope).
2960 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
2961 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
2966 Set_Imported (Def_Id);
2968 -- Special processing for Convention_Intrinsic
2970 if C = Convention_Intrinsic then
2972 -- Link_Name argument not allowed for intrinsic
2975 and then Chars (Arg3) = Name_Link_Name
2980 if Present (Arg4) then
2982 ("Link_Name argument not allowed for " &
2987 Set_Is_Intrinsic_Subprogram (Def_Id);
2989 -- If no external name is present, then check that
2990 -- this is a valid intrinsic subprogram. If an external
2991 -- name is present, then this is handled by the back end.
2994 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
2998 -- All interfaced procedures need an external symbol
2999 -- created for them since they are always referenced
3000 -- from another object file.
3002 Set_Is_Public (Def_Id);
3004 -- Verify that the subprogram does not have a completion
3005 -- through a renaming declaration. For other completions
3006 -- the pragma appears as a too late representation.
3009 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3013 and then Nkind (Decl) = N_Subprogram_Declaration
3014 and then Present (Corresponding_Body (Decl))
3017 (Unit_Declaration_Node
3018 (Corresponding_Body (Decl))) =
3019 N_Subprogram_Renaming_Declaration
3021 Error_Msg_Sloc := Sloc (Def_Id);
3022 Error_Msg_NE ("cannot import&#," &
3023 " already completed by a renaming",
3028 Set_Has_Completion (Def_Id);
3029 Process_Interface_Name (Def_Id, Arg3, Arg4);
3032 if Is_Compilation_Unit (Hom_Id) then
3034 -- Its possible homonyms are not affected by the pragma.
3035 -- Such homonyms might be present in the context of other
3036 -- units being compiled.
3041 Hom_Id := Homonym (Hom_Id);
3045 -- When the convention is Java, we also allow Import to be given
3046 -- for packages, exceptions, and record components.
3048 elsif C = Convention_Java
3050 (Ekind (Def_Id) = E_Package
3051 or else Ekind (Def_Id) = E_Exception
3052 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3054 Set_Imported (Def_Id);
3055 Set_Is_Public (Def_Id);
3056 Process_Interface_Name (Def_Id, Arg3, Arg4);
3060 ("second argument of pragma% must be object or subprogram",
3064 -- If this pragma applies to a compilation unit, then the unit,
3065 -- which is a subprogram, does not require (or allow) a body.
3066 -- We also do not need to elaborate imported procedures.
3068 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3070 Cunit : constant Node_Id := Parent (Parent (N));
3072 Set_Body_Required (Cunit, False);
3075 end Process_Import_Or_Interface;
3077 --------------------
3078 -- Process_Inline --
3079 --------------------
3081 procedure Process_Inline (Active : Boolean) is
3087 Effective : Boolean := False;
3089 procedure Make_Inline (Subp : Entity_Id);
3090 -- Subp is the defining unit name of the subprogram
3091 -- declaration. Set the flag, as well as the flag in the
3092 -- corresponding body, if there is one present.
3094 procedure Set_Inline_Flags (Subp : Entity_Id);
3095 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp
3097 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3098 -- Returns True if it can be determined at this stage that inlining
3099 -- is not possible, for examle if the body is available and contains
3100 -- exception handlers, we prevent inlining, since otherwise we can
3101 -- get undefined symbols at link time. This function also emits a
3102 -- warning if front-end inlining is enabled and the pragma appears
3104 -- ??? is business with link symbols still valid, or does it relate
3105 -- to front end ZCX which is being phased out ???
3107 ---------------------------
3108 -- Inlining_Not_Possible --
3109 ---------------------------
3111 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3112 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3116 if Nkind (Decl) = N_Subprogram_Body then
3117 Stats := Handled_Statement_Sequence (Decl);
3118 return Present (Exception_Handlers (Stats))
3119 or else Present (At_End_Proc (Stats));
3121 elsif Nkind (Decl) = N_Subprogram_Declaration
3122 and then Present (Corresponding_Body (Decl))
3124 if Front_End_Inlining
3125 and then Analyzed (Corresponding_Body (Decl))
3127 Error_Msg_N ("pragma appears too late, ignored?", N);
3130 -- If the subprogram is a renaming as body, the body is
3131 -- just a call to the renamed subprogram, and inlining is
3132 -- trivially possible.
3135 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl)))
3136 = N_Subprogram_Renaming_Declaration
3142 Handled_Statement_Sequence
3143 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3146 Present (Exception_Handlers (Stats))
3147 or else Present (At_End_Proc (Stats));
3151 -- If body is not available, assume the best, the check is
3152 -- performed again when compiling enclosing package bodies.
3156 end Inlining_Not_Possible;
3162 procedure Make_Inline (Subp : Entity_Id) is
3163 Kind : constant Entity_Kind := Ekind (Subp);
3164 Inner_Subp : Entity_Id := Subp;
3167 if Etype (Subp) = Any_Type then
3170 -- If inlining is not possible, for now do not treat as an error
3172 elsif Inlining_Not_Possible (Subp) then
3176 -- Here we have a candidate for inlining, but we must exclude
3177 -- derived operations. Otherwise we will end up trying to
3178 -- inline a phantom declaration, and the result would be to
3179 -- drag in a body which has no direct inlining associated with
3180 -- it. That would not only be inefficient but would also result
3181 -- in the backend doing cross-unit inlining in cases where it
3182 -- was definitely inappropriate to do so.
3184 -- However, a simple Comes_From_Source test is insufficient,
3185 -- since we do want to allow inlining of generic instances,
3186 -- which also do not come from source. Predefined operators do
3187 -- not come from source but are not inlineable either.
3189 elsif not Comes_From_Source (Subp)
3190 and then not Is_Generic_Instance (Subp)
3191 and then Scope (Subp) /= Standard_Standard
3196 -- The referenced entity must either be the enclosing entity,
3197 -- or an entity declared within the current open scope.
3199 elsif Present (Scope (Subp))
3200 and then Scope (Subp) /= Current_Scope
3201 and then Subp /= Current_Scope
3204 ("argument of% must be entity in current scope", Assoc);
3208 -- Processing for procedure, operator or function.
3209 -- If subprogram is aliased (as for an instance) indicate
3210 -- that the renamed entity (if declared in the same unit)
3213 if Is_Subprogram (Subp) then
3214 while Present (Alias (Inner_Subp)) loop
3215 Inner_Subp := Alias (Inner_Subp);
3218 if In_Same_Source_Unit (Subp, Inner_Subp) then
3219 Set_Inline_Flags (Inner_Subp);
3221 Decl := Parent (Parent (Inner_Subp));
3223 if Nkind (Decl) = N_Subprogram_Declaration
3224 and then Present (Corresponding_Body (Decl))
3226 Set_Inline_Flags (Corresponding_Body (Decl));
3232 -- For a generic subprogram set flag as well, for use at
3233 -- the point of instantiation, to determine whether the
3234 -- body should be generated.
3236 elsif Is_Generic_Subprogram (Subp) then
3237 Set_Inline_Flags (Subp);
3240 -- Literals are by definition inlined
3242 elsif Kind = E_Enumeration_Literal then
3245 -- Anything else is an error
3249 ("expect subprogram name for pragma%", Assoc);
3253 ----------------------
3254 -- Set_Inline_Flags --
3255 ----------------------
3257 procedure Set_Inline_Flags (Subp : Entity_Id) is
3260 Set_Is_Inlined (Subp, True);
3263 if not Has_Pragma_Inline (Subp) then
3264 Set_Has_Pragma_Inline (Subp);
3265 Set_Next_Rep_Item (N, First_Rep_Item (Subp));
3266 Set_First_Rep_Item (Subp, N);
3269 end Set_Inline_Flags;
3271 -- Start of processing for Process_Inline
3274 Check_No_Identifiers;
3275 Check_At_Least_N_Arguments (1);
3278 Inline_Processing_Required := True;
3282 while Present (Assoc) loop
3283 Subp_Id := Expression (Assoc);
3287 if Is_Entity_Name (Subp_Id) then
3288 Subp := Entity (Subp_Id);
3290 if Subp = Any_Id then
3296 while Present (Homonym (Subp))
3297 and then Scope (Homonym (Subp)) = Current_Scope
3299 Make_Inline (Homonym (Subp));
3300 Subp := Homonym (Subp);
3307 ("inappropriate argument for pragma%", Assoc);
3310 and then Warn_On_Redundant_Constructs
3312 if Inlining_Not_Possible (Subp) then
3314 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
3317 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
3325 ----------------------------
3326 -- Process_Interface_Name --
3327 ----------------------------
3329 procedure Process_Interface_Name
3330 (Subprogram_Def : Entity_Id;
3336 String_Val : String_Id;
3338 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3339 -- SN is a string literal node for an interface name. This routine
3340 -- performs some minimal checks that the name is reasonable. In
3341 -- particular that no spaces or other obviously incorrect characters
3342 -- appear. This is only a warning, since any characters are allowed.
3344 ----------------------------------
3345 -- Check_Form_Of_Interface_Name --
3346 ----------------------------------
3348 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3349 S : constant String_Id := Strval (Expr_Value_S (SN));
3350 SL : constant Nat := String_Length (S);
3355 Error_Msg_N ("interface name cannot be null string", SN);
3358 for J in 1 .. SL loop
3359 C := Get_String_Char (S, J);
3361 if Warn_On_Export_Import
3362 and then (not In_Character_Range (C)
3363 or else Get_Character (C) = ' '
3364 or else Get_Character (C) = ',')
3367 ("?interface name contains illegal character", SN);
3370 end Check_Form_Of_Interface_Name;
3372 -- Start of processing for Process_Interface_Name
3375 if No (Link_Arg) then
3376 if No (Ext_Arg) then
3379 elsif Chars (Ext_Arg) = Name_Link_Name then
3381 Link_Nam := Expression (Ext_Arg);
3384 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3385 Ext_Nam := Expression (Ext_Arg);
3390 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3391 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3392 Ext_Nam := Expression (Ext_Arg);
3393 Link_Nam := Expression (Link_Arg);
3396 -- Check expressions for external name and link name are static
3398 if Present (Ext_Nam) then
3399 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3400 Check_Form_Of_Interface_Name (Ext_Nam);
3402 -- Verify that the external name is not the name of a local
3403 -- entity, which would hide the imported one and lead to
3404 -- run-time surprises. The problem can only arise for entities
3405 -- declared in a package body (otherwise the external name is
3406 -- fully qualified and won't conflict).
3414 if Prag_Id = Pragma_Import then
3415 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3417 E := Entity_Id (Get_Name_Table_Info (Nam));
3419 if Nam /= Chars (Subprogram_Def)
3420 and then Present (E)
3421 and then not Is_Overloadable (E)
3422 and then Is_Immediately_Visible (E)
3423 and then not Is_Imported (E)
3424 and then Ekind (Scope (E)) = E_Package
3428 while Present (Par) loop
3429 if Nkind (Par) = N_Package_Body then
3430 Error_Msg_Sloc := Sloc (E);
3432 ("imported entity is hidden by & declared#",
3437 Par := Parent (Par);
3444 if Present (Link_Nam) then
3445 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3446 Check_Form_Of_Interface_Name (Link_Nam);
3449 -- If there is no link name, just set the external name
3451 if No (Link_Nam) then
3452 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
3454 -- For the Link_Name case, the given literal is preceded by an
3455 -- asterisk, which indicates to GCC that the given name should
3456 -- be taken literally, and in particular that no prepending of
3457 -- underlines should occur, even in systems where this is the
3462 Store_String_Char (Get_Char_Code ('*'));
3463 String_Val := Strval (Expr_Value_S (Link_Nam));
3465 for J in 1 .. String_Length (String_Val) loop
3466 Store_String_Char (Get_String_Char (String_Val, J));
3470 Make_String_Literal (Sloc (Link_Nam), End_String);
3473 Set_Encoded_Interface_Name
3474 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3475 Check_Duplicated_Export_Name (Link_Nam);
3476 end Process_Interface_Name;
3478 -----------------------------------------
3479 -- Process_Interrupt_Or_Attach_Handler --
3480 -----------------------------------------
3482 procedure Process_Interrupt_Or_Attach_Handler is
3483 Arg1_X : constant Node_Id := Expression (Arg1);
3484 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3485 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3488 Set_Is_Interrupt_Handler (Handler_Proc);
3490 -- If the pragma is not associated with a handler procedure
3491 -- within a protected type, then it must be for a nonprotected
3492 -- procedure for the AAMP target, in which case we don't
3493 -- associate a representation item with the procedure's scope.
3495 if Ekind (Proc_Scope) = E_Protected_Type then
3496 if Prag_Id = Pragma_Interrupt_Handler
3498 Prag_Id = Pragma_Attach_Handler
3500 Record_Rep_Item (Proc_Scope, N);
3503 end Process_Interrupt_Or_Attach_Handler;
3505 --------------------------------------------------
3506 -- Process_Restrictions_Or_Restriction_Warnings --
3507 --------------------------------------------------
3509 procedure Process_Restrictions_Or_Restriction_Warnings is
3511 R_Id : Restriction_Id;
3516 procedure Set_Warning (R : All_Restrictions);
3517 -- If this is a Restriction_Warnings pragma, set warning flag,
3518 -- otherwise reset the flag.
3524 procedure Set_Warning (R : All_Restrictions) is
3526 if Prag_Id = Pragma_Restriction_Warnings then
3527 Restriction_Warnings (R) := True;
3529 Restriction_Warnings (R) := False;
3533 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
3536 Check_Ada_83_Warning;
3537 Check_At_Least_N_Arguments (1);
3538 Check_Valid_Configuration_Pragma;
3541 while Present (Arg) loop
3543 Expr := Expression (Arg);
3545 -- Case of no restriction identifier present
3547 if Id = No_Name then
3548 if Nkind (Expr) /= N_Identifier then
3550 ("invalid form for restriction", Arg);
3555 (Process_Restriction_Synonyms (Expr));
3557 if R_Id not in All_Boolean_Restrictions then
3559 ("invalid restriction identifier", Arg);
3562 if Implementation_Restriction (R_Id) then
3564 (No_Implementation_Restrictions, Arg);
3567 Set_Restriction (R_Id, N);
3570 -- A very special case that must be processed here:
3571 -- pragma Restrictions (No_Exceptions) turns off
3572 -- all run-time checking. This is a bit dubious in
3573 -- terms of the formal language definition, but it
3574 -- is what is intended by RM H.4(12).
3576 if R_Id = No_Exceptions then
3577 Scope_Suppress := (others => True);
3580 -- Case of restriction identifier present
3583 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
3584 Analyze_And_Resolve (Expr, Any_Integer);
3586 if R_Id not in All_Parameter_Restrictions then
3588 ("invalid restriction parameter identifier", Arg);
3590 elsif not Is_OK_Static_Expression (Expr) then
3591 Flag_Non_Static_Expr
3592 ("value must be static expression!", Expr);
3595 elsif not Is_Integer_Type (Etype (Expr))
3596 or else Expr_Value (Expr) < 0
3599 ("value must be non-negative integer", Arg);
3601 -- Restriction pragma is active
3604 Val := Expr_Value (Expr);
3606 if not UI_Is_In_Int_Range (Val) then
3608 ("pragma ignored, value too large?", Arg);
3610 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
3618 end Process_Restrictions_Or_Restriction_Warnings;
3620 ---------------------------------
3621 -- Process_Suppress_Unsuppress --
3622 ---------------------------------
3624 -- Note: this procedure makes entries in the check suppress data
3625 -- structures managed by Sem. See spec of package Sem for full
3626 -- details on how we handle recording of check suppression.
3628 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
3633 In_Package_Spec : constant Boolean :=
3634 (Ekind (Current_Scope) = E_Package
3636 Ekind (Current_Scope) = E_Generic_Package)
3637 and then not In_Package_Body (Current_Scope);
3639 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
3640 -- Used to suppress a single check on the given entity
3642 --------------------------------
3643 -- Suppress_Unsuppress_Echeck --
3644 --------------------------------
3646 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
3647 ESR : constant Entity_Check_Suppress_Record :=
3650 Suppress => Suppress_Case);
3653 Set_Checks_May_Be_Suppressed (E);
3655 if In_Package_Spec then
3656 Global_Entity_Suppress.Append (ESR);
3658 Local_Entity_Suppress.Append (ESR);
3661 -- If this is a first subtype, and the base type is distinct,
3662 -- then also set the suppress flags on the base type.
3664 if Is_First_Subtype (E)
3665 and then Etype (E) /= E
3667 Suppress_Unsuppress_Echeck (Etype (E), C);
3669 end Suppress_Unsuppress_Echeck;
3671 -- Start of processing for Process_Suppress_Unsuppress
3674 -- Suppress/Unsuppress can appear as a configuration pragma,
3675 -- or in a declarative part or a package spec (RM 11.5(5))
3677 if not Is_Configuration_Pragma then
3678 Check_Is_In_Decl_Part_Or_Package_Spec;
3681 Check_At_Least_N_Arguments (1);
3682 Check_At_Most_N_Arguments (2);
3683 Check_No_Identifier (Arg1);
3684 Check_Arg_Is_Identifier (Arg1);
3686 if not Is_Check_Name (Chars (Expression (Arg1))) then
3688 ("argument of pragma% is not valid check name", Arg1);
3690 C := Get_Check_Id (Chars (Expression (Arg1)));
3693 if Arg_Count = 1 then
3695 -- Make an entry in the local scope suppress table. This is the
3696 -- table that directly shows the current value of the scope
3697 -- suppress check for any check id value.
3699 if C = All_Checks then
3700 for J in Scope_Suppress'Range loop
3701 Scope_Suppress (J) := Suppress_Case;
3704 Scope_Suppress (C) := Suppress_Case;
3707 -- Also make an entry in the Local_Entity_Suppress table. See
3708 -- extended description in the package spec of Sem for details.
3710 Local_Entity_Suppress.Append
3713 Suppress => Suppress_Case));
3715 -- Case of two arguments present, where the check is
3716 -- suppressed for a specified entity (given as the second
3717 -- argument of the pragma)
3720 Check_Optional_Identifier (Arg2, Name_On);
3721 E_Id := Expression (Arg2);
3724 if not Is_Entity_Name (E_Id) then
3726 ("second argument of pragma% must be entity name", Arg2);
3735 -- Enforce RM 11.5(7) which requires that for a pragma that
3736 -- appears within a package spec, the named entity must be
3737 -- within the package spec. We allow the package name itself
3738 -- to be mentioned since that makes sense, although it is not
3739 -- strictly allowed by 11.5(7).
3742 and then E /= Current_Scope
3743 and then Scope (E) /= Current_Scope
3746 ("entity in pragma% is not in package spec ('R'M 11.5(7))",
3750 -- Loop through homonyms. As noted below, in the case of a package
3751 -- spec, only homonyms within the package spec are considered.
3754 Suppress_Unsuppress_Echeck (E, C);
3756 if Is_Generic_Instance (E)
3757 and then Is_Subprogram (E)
3758 and then Present (Alias (E))
3760 Suppress_Unsuppress_Echeck (Alias (E), C);
3763 -- Move to next homonym
3768 -- If we are within a package specification, the
3769 -- pragma only applies to homonyms in the same scope.
3771 exit when In_Package_Spec
3772 and then Scope (E) /= Current_Scope;
3775 end Process_Suppress_Unsuppress;
3781 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
3783 if Is_Imported (E) then
3785 ("cannot export entity& that was previously imported", Arg);
3787 elsif Present (Address_Clause (E)) then
3789 ("cannot export entity& that has an address clause", Arg);
3792 Set_Is_Exported (E);
3794 -- Generate a reference for entity explicitly, because the
3795 -- identifier may be overloaded and name resolution will not
3798 Generate_Reference (E, Arg);
3800 -- Deal with exporting non-library level entity
3802 if not Is_Library_Level_Entity (E) then
3804 -- Not allowed at all for subprograms
3806 if Is_Subprogram (E) then
3807 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
3809 -- Otherwise set public and statically allocated
3813 Set_Is_Statically_Allocated (E);
3815 -- Warn if the corresponding W flag is set and the pragma
3816 -- comes from source. The latter may not be true e.g. on
3817 -- VMS where we expand export pragmas for exception codes
3818 -- associated with imported or exported exceptions. We do
3819 -- not want to generate a warning for something that the
3820 -- user did not write.
3822 if Warn_On_Export_Import
3823 and then Comes_From_Source (Arg)
3826 ("?& has been made static as a result of Export", Arg, E);
3828 ("\this usage is non-standard and non-portable", Arg);
3833 if Warn_On_Export_Import and then Is_Type (E) then
3835 ("exporting a type has no effect?", Arg, E);
3838 if Warn_On_Export_Import and Inside_A_Generic then
3840 ("all instances of& will have the same external name?", Arg, E);
3844 ----------------------------------------------
3845 -- Set_Extended_Import_Export_External_Name --
3846 ----------------------------------------------
3848 procedure Set_Extended_Import_Export_External_Name
3849 (Internal_Ent : Entity_Id;
3850 Arg_External : Node_Id)
3852 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
3856 if No (Arg_External) then
3860 Check_Arg_Is_External_Name (Arg_External);
3862 if Nkind (Arg_External) = N_String_Literal then
3863 if String_Length (Strval (Arg_External)) = 0 then
3866 New_Name := Adjust_External_Name_Case (Arg_External);
3869 elsif Nkind (Arg_External) = N_Identifier then
3870 New_Name := Get_Default_External_Name (Arg_External);
3872 -- Check_Arg_Is_External_Name should let through only
3873 -- identifiers and string literals or static string
3874 -- expressions (which are folded to string literals).
3877 raise Program_Error;
3880 -- If we already have an external name set (by a prior normal
3881 -- Import or Export pragma), then the external names must match
3883 if Present (Interface_Name (Internal_Ent)) then
3884 Check_Matching_Internal_Names : declare
3885 S1 : constant String_Id := Strval (Old_Name);
3886 S2 : constant String_Id := Strval (New_Name);
3889 -- Called if names do not match
3895 procedure Mismatch is
3897 Error_Msg_Sloc := Sloc (Old_Name);
3899 ("external name does not match that given #",
3903 -- Start of processing for Check_Matching_Internal_Names
3906 if String_Length (S1) /= String_Length (S2) then
3910 for J in 1 .. String_Length (S1) loop
3911 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
3916 end Check_Matching_Internal_Names;
3918 -- Otherwise set the given name
3921 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
3922 Check_Duplicated_Export_Name (New_Name);
3924 end Set_Extended_Import_Export_External_Name;
3930 procedure Set_Imported (E : Entity_Id) is
3932 Error_Msg_Sloc := Sloc (E);
3934 if Is_Exported (E) or else Is_Imported (E) then
3935 Error_Msg_NE ("import of& declared# not allowed", N, E);
3937 if Is_Exported (E) then
3938 Error_Msg_N ("\entity was previously exported", N);
3940 Error_Msg_N ("\entity was previously imported", N);
3943 Error_Pragma ("\(pragma% applies to all previous entities)");
3946 Set_Is_Imported (E);
3948 -- If the entity is an object that is not at the library
3949 -- level, then it is statically allocated. We do not worry
3950 -- about objects with address clauses in this context since
3951 -- they are not really imported in the linker sense.
3954 and then not Is_Library_Level_Entity (E)
3955 and then No (Address_Clause (E))
3957 Set_Is_Statically_Allocated (E);
3962 -------------------------
3963 -- Set_Mechanism_Value --
3964 -------------------------
3966 -- Note: the mechanism name has not been analyzed (and cannot indeed
3967 -- be analyzed, since it is semantic nonsense), so we get it in the
3968 -- exact form created by the parser.
3970 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
3974 procedure Bad_Class;
3975 -- Signal bad descriptor class name
3977 procedure Bad_Mechanism;
3978 -- Signal bad mechanism name
3984 procedure Bad_Class is
3986 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
3989 -------------------------
3990 -- Bad_Mechanism_Value --
3991 -------------------------
3993 procedure Bad_Mechanism is
3995 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
3998 -- Start of processing for Set_Mechanism_Value
4001 if Mechanism (Ent) /= Default_Mechanism then
4003 ("mechanism for & has already been set", Mech_Name, Ent);
4006 -- MECHANISM_NAME ::= value | reference | descriptor
4008 if Nkind (Mech_Name) = N_Identifier then
4009 if Chars (Mech_Name) = Name_Value then
4010 Set_Mechanism (Ent, By_Copy);
4013 elsif Chars (Mech_Name) = Name_Reference then
4014 Set_Mechanism (Ent, By_Reference);
4017 elsif Chars (Mech_Name) = Name_Descriptor then
4018 Check_VMS (Mech_Name);
4019 Set_Mechanism (Ent, By_Descriptor);
4022 elsif Chars (Mech_Name) = Name_Copy then
4024 ("bad mechanism name, Value assumed", Mech_Name);
4030 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
4031 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4033 -- Note: this form is parsed as an indexed component
4035 elsif Nkind (Mech_Name) = N_Indexed_Component then
4036 Class := First (Expressions (Mech_Name));
4038 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4039 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
4040 or else Present (Next (Class))
4045 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
4046 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4048 -- Note: this form is parsed as a function call
4050 elsif Nkind (Mech_Name) = N_Function_Call then
4052 Param := First (Parameter_Associations (Mech_Name));
4054 if Nkind (Name (Mech_Name)) /= N_Identifier
4055 or else Chars (Name (Mech_Name)) /= Name_Descriptor
4056 or else Present (Next (Param))
4057 or else No (Selector_Name (Param))
4058 or else Chars (Selector_Name (Param)) /= Name_Class
4062 Class := Explicit_Actual_Parameter (Param);
4069 -- Fall through here with Class set to descriptor class name
4071 Check_VMS (Mech_Name);
4073 if Nkind (Class) /= N_Identifier then
4076 elsif Chars (Class) = Name_UBS then
4077 Set_Mechanism (Ent, By_Descriptor_UBS);
4079 elsif Chars (Class) = Name_UBSB then
4080 Set_Mechanism (Ent, By_Descriptor_UBSB);
4082 elsif Chars (Class) = Name_UBA then
4083 Set_Mechanism (Ent, By_Descriptor_UBA);
4085 elsif Chars (Class) = Name_S then
4086 Set_Mechanism (Ent, By_Descriptor_S);
4088 elsif Chars (Class) = Name_SB then
4089 Set_Mechanism (Ent, By_Descriptor_SB);
4091 elsif Chars (Class) = Name_A then
4092 Set_Mechanism (Ent, By_Descriptor_A);
4094 elsif Chars (Class) = Name_NCA then
4095 Set_Mechanism (Ent, By_Descriptor_NCA);
4100 end Set_Mechanism_Value;
4102 ---------------------------
4103 -- Set_Ravenscar_Profile --
4104 ---------------------------
4106 -- The tasks to be done here are
4108 -- Set required policies
4110 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4111 -- pragma Locking_Policy (Ceiling_Locking)
4113 -- Set Detect_Blocking mode
4115 -- Set required restrictions (see System.Rident for detailed list)
4117 procedure Set_Ravenscar_Profile (N : Node_Id) is
4119 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4121 if Task_Dispatching_Policy /= ' '
4122 and then Task_Dispatching_Policy /= 'F'
4124 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
4125 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4127 -- Set the FIFO_Within_Priorities policy, but always
4128 -- preserve System_Location since we like the error
4129 -- message with the run time name.
4132 Task_Dispatching_Policy := 'F';
4134 if Task_Dispatching_Policy_Sloc /= System_Location then
4135 Task_Dispatching_Policy_Sloc := Loc;
4139 -- pragma Locking_Policy (Ceiling_Locking)
4141 if Locking_Policy /= ' '
4142 and then Locking_Policy /= 'C'
4144 Error_Msg_Sloc := Locking_Policy_Sloc;
4145 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4147 -- Set the Ceiling_Locking policy, but always preserve
4148 -- System_Location since we like the error message with the
4152 Locking_Policy := 'C';
4154 if Locking_Policy_Sloc /= System_Location then
4155 Locking_Policy_Sloc := Loc;
4159 -- pragma Detect_Blocking
4161 Detect_Blocking := True;
4163 -- Set the corresponding restrictions
4165 Set_Profile_Restrictions (Ravenscar, N, Warn => False);
4166 end Set_Ravenscar_Profile;
4168 -- Start of processing for Analyze_Pragma
4171 if not Is_Pragma_Name (Chars (N)) then
4172 if Warn_On_Unrecognized_Pragma then
4173 Error_Pragma ("unrecognized pragma%!?");
4178 Prag_Id := Get_Pragma_Id (Chars (N));
4188 if Present (Pragma_Argument_Associations (N)) then
4189 Arg1 := First (Pragma_Argument_Associations (N));
4191 if Present (Arg1) then
4192 Arg2 := Next (Arg1);
4194 if Present (Arg2) then
4195 Arg3 := Next (Arg2);
4197 if Present (Arg3) then
4198 Arg4 := Next (Arg3);
4204 -- Count number of arguments
4211 while Present (Arg_Node) loop
4212 Arg_Count := Arg_Count + 1;
4217 -- An enumeration type defines the pragmas that are supported by the
4218 -- implementation. Get_Pragma_Id (in package Prag) transorms a name
4219 -- into the corresponding enumeration value for the following case.
4227 -- pragma Abort_Defer;
4229 when Pragma_Abort_Defer =>
4231 Check_Arg_Count (0);
4233 -- The only required semantic processing is to check the
4234 -- placement. This pragma must appear at the start of the
4235 -- statement sequence of a handled sequence of statements.
4237 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
4238 or else N /= First (Statements (Parent (N)))
4249 -- Note: this pragma also has some specific processing in Par.Prag
4250 -- because we want to set the Ada version mode during parsing.
4252 when Pragma_Ada_83 =>
4254 Ada_Version := Ada_83;
4255 Check_Arg_Count (0);
4263 -- Note: this pragma also has some specific processing in Par.Prag
4264 -- because we want to set the Ada 83 version mode during parsing.
4266 when Pragma_Ada_95 =>
4268 Ada_Version := Ada_95;
4269 Check_Arg_Count (0);
4277 -- Note: this pragma also has some specific processing in Par.Prag
4278 -- because we want to set the Ada 83 version mode during parsing.
4280 when Pragma_Ada_05 =>
4282 Ada_Version := Ada_05;
4283 Check_Arg_Count (0);
4285 ----------------------
4286 -- All_Calls_Remote --
4287 ----------------------
4289 -- pragma All_Calls_Remote [(library_package_NAME)];
4291 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
4292 Lib_Entity : Entity_Id;
4295 Check_Ada_83_Warning;
4296 Check_Valid_Library_Unit_Pragma;
4298 if Nkind (N) = N_Null_Statement then
4302 Lib_Entity := Find_Lib_Unit_Name;
4304 -- This pragma should only apply to a RCI unit (RM E.2.3(23)).
4306 if Present (Lib_Entity)
4307 and then not Debug_Flag_U
4309 if not Is_Remote_Call_Interface (Lib_Entity) then
4310 Error_Pragma ("pragma% only apply to rci unit");
4312 -- Set flag for entity of the library unit
4315 Set_Has_All_Calls_Remote (Lib_Entity);
4319 end All_Calls_Remote;
4325 -- pragma Annotate (IDENTIFIER {, ARG});
4326 -- ARG ::= NAME | EXPRESSION
4328 when Pragma_Annotate => Annotate : begin
4330 Check_At_Least_N_Arguments (1);
4331 Check_Arg_Is_Identifier (Arg1);
4334 Arg : Node_Id := Arg2;
4338 while Present (Arg) loop
4339 Exp := Expression (Arg);
4342 if Is_Entity_Name (Exp) then
4345 elsif Nkind (Exp) = N_String_Literal then
4346 Resolve (Exp, Standard_String);
4348 elsif Is_Overloaded (Exp) then
4349 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
4364 -- pragma Assert (Boolean_EXPRESSION [, static_string_EXPRESSION]);
4366 when Pragma_Assert =>
4368 Check_No_Identifiers;
4370 if Arg_Count > 1 then
4371 Check_Arg_Count (2);
4372 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4375 -- If expansion is active and assertions are inactive, then
4376 -- we rewrite the Assertion as:
4378 -- if False and then condition then
4382 -- The reason we do this rewriting during semantic analysis
4383 -- rather than as part of normal expansion is that we cannot
4384 -- analyze and expand the code for the boolean expression
4385 -- directly, or it may cause insertion of actions that would
4386 -- escape the attempt to suppress the assertion code.
4388 if Expander_Active and not Assertions_Enabled then
4390 Make_If_Statement (Loc,
4393 Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
4394 Right_Opnd => Get_Pragma_Arg (Arg1)),
4395 Then_Statements => New_List (
4396 Make_Null_Statement (Loc))));
4400 -- Otherwise (if assertions are enabled, or if we are not
4401 -- operating with expansion active), then we just analyze
4402 -- and resolve the expression.
4405 Analyze_And_Resolve (Expression (Arg1), Any_Boolean);
4412 -- pragma AST_Entry (entry_IDENTIFIER);
4414 when Pragma_AST_Entry => AST_Entry : declare
4420 Check_Arg_Count (1);
4421 Check_No_Identifiers;
4422 Check_Arg_Is_Local_Name (Arg1);
4423 Ent := Entity (Expression (Arg1));
4425 -- Note: the implementation of the AST_Entry pragma could handle
4426 -- the entry family case fine, but for now we are consistent with
4427 -- the DEC rules, and do not allow the pragma, which of course
4428 -- has the effect of also forbidding the attribute.
4430 if Ekind (Ent) /= E_Entry then
4432 ("pragma% argument must be simple entry name", Arg1);
4434 elsif Is_AST_Entry (Ent) then
4436 ("duplicate % pragma for entry", Arg1);
4438 elsif Has_Homonym (Ent) then
4440 ("pragma% argument cannot specify overloaded entry", Arg1);
4444 FF : constant Entity_Id := First_Formal (Ent);
4447 if Present (FF) then
4448 if Present (Next_Formal (FF)) then
4450 ("entry for pragma% can have only one argument",
4453 elsif Parameter_Mode (FF) /= E_In_Parameter then
4455 ("entry parameter for pragma% must have mode IN",
4461 Set_Is_AST_Entry (Ent);
4469 -- pragma Asynchronous (LOCAL_NAME);
4471 when Pragma_Asynchronous => Asynchronous : declare
4479 procedure Process_Async_Pragma;
4480 -- Common processing for procedure and access-to-procedure case
4482 --------------------------
4483 -- Process_Async_Pragma --
4484 --------------------------
4486 procedure Process_Async_Pragma is
4488 if not Present (L) then
4489 Set_Is_Asynchronous (Nm);
4493 -- The formals should be of mode IN (RM E.4.1(6))
4496 while Present (S) loop
4497 Formal := Defining_Identifier (S);
4499 if Nkind (Formal) = N_Defining_Identifier
4500 and then Ekind (Formal) /= E_In_Parameter
4503 ("pragma% procedure can only have IN parameter",
4510 Set_Is_Asynchronous (Nm);
4511 end Process_Async_Pragma;
4513 -- Start of processing for pragma Asynchronous
4516 Check_Ada_83_Warning;
4517 Check_No_Identifiers;
4518 Check_Arg_Count (1);
4519 Check_Arg_Is_Local_Name (Arg1);
4521 if Debug_Flag_U then
4525 C_Ent := Cunit_Entity (Current_Sem_Unit);
4526 Analyze (Expression (Arg1));
4527 Nm := Entity (Expression (Arg1));
4529 if not Is_Remote_Call_Interface (C_Ent)
4530 and then not Is_Remote_Types (C_Ent)
4532 -- This pragma should only appear in an RCI or Remote Types
4533 -- unit (RM E.4.1(4))
4536 ("pragma% not in Remote_Call_Interface or " &
4537 "Remote_Types unit");
4540 if Ekind (Nm) = E_Procedure
4541 and then Nkind (Parent (Nm)) = N_Procedure_Specification
4543 if not Is_Remote_Call_Interface (Nm) then
4545 ("pragma% cannot be applied on non-remote procedure",
4549 L := Parameter_Specifications (Parent (Nm));
4550 Process_Async_Pragma;
4553 elsif Ekind (Nm) = E_Function then
4555 ("pragma% cannot be applied to function", Arg1);
4557 elsif Ekind (Nm) = E_Record_Type
4558 and then Present (Corresponding_Remote_Type (Nm))
4560 -- A record type that is the Equivalent_Type for
4561 -- a remote access-to-subprogram type.
4563 N := Declaration_Node (Corresponding_Remote_Type (Nm));
4565 if Nkind (N) = N_Full_Type_Declaration
4566 and then Nkind (Type_Definition (N)) =
4567 N_Access_Procedure_Definition
4569 L := Parameter_Specifications (Type_Definition (N));
4570 Process_Async_Pragma;
4572 if Is_Asynchronous (Nm)
4573 and then Expander_Active
4575 RACW_Type_Is_Asynchronous (
4576 Underlying_RACW_Type (Nm));
4581 ("pragma% cannot reference access-to-function type",
4585 -- Only other possibility is Access-to-class-wide type
4587 elsif Is_Access_Type (Nm)
4588 and then Is_Class_Wide_Type (Designated_Type (Nm))
4590 Check_First_Subtype (Arg1);
4591 Set_Is_Asynchronous (Nm);
4592 if Expander_Active then
4593 RACW_Type_Is_Asynchronous (Nm);
4597 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
4605 -- pragma Atomic (LOCAL_NAME);
4607 when Pragma_Atomic =>
4608 Process_Atomic_Shared_Volatile;
4610 -----------------------
4611 -- Atomic_Components --
4612 -----------------------
4614 -- pragma Atomic_Components (array_LOCAL_NAME);
4616 -- This processing is shared by Volatile_Components
4618 when Pragma_Atomic_Components |
4619 Pragma_Volatile_Components =>
4621 Atomic_Components : declare
4628 Check_Ada_83_Warning;
4629 Check_No_Identifiers;
4630 Check_Arg_Count (1);
4631 Check_Arg_Is_Local_Name (Arg1);
4632 E_Id := Expression (Arg1);
4634 if Etype (E_Id) = Any_Type then
4640 if Rep_Item_Too_Early (E, N)
4642 Rep_Item_Too_Late (E, N)
4647 D := Declaration_Node (E);
4650 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
4652 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
4653 and then Nkind (D) = N_Object_Declaration
4654 and then Nkind (Object_Definition (D)) =
4655 N_Constrained_Array_Definition)
4657 -- The flag is set on the object, or on the base type
4659 if Nkind (D) /= N_Object_Declaration then
4663 Set_Has_Volatile_Components (E);
4665 if Prag_Id = Pragma_Atomic_Components then
4666 Set_Has_Atomic_Components (E);
4668 if Is_Packed (E) then
4669 Set_Is_Packed (E, False);
4672 ("?Pack canceled, cannot pack atomic components",
4678 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
4680 end Atomic_Components;
4682 --------------------
4683 -- Attach_Handler --
4684 --------------------
4686 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
4688 when Pragma_Attach_Handler =>
4689 Check_Ada_83_Warning;
4690 Check_No_Identifiers;
4691 Check_Arg_Count (2);
4693 if No_Run_Time_Mode then
4694 Error_Msg_CRT ("Attach_Handler pragma", N);
4696 Check_Interrupt_Or_Attach_Handler;
4698 -- The expression that designates the attribute may
4699 -- depend on a discriminant, and is therefore a per-
4700 -- object expression, to be expanded in the init proc.
4701 -- If expansion is enabled, perform semantic checks
4704 if Expander_Active then
4706 Temp : constant Node_Id :=
4707 New_Copy_Tree (Expression (Arg2));
4709 Set_Parent (Temp, N);
4710 Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
4714 Analyze (Expression (Arg2));
4715 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
4718 Process_Interrupt_Or_Attach_Handler;
4721 --------------------
4722 -- C_Pass_By_Copy --
4723 --------------------
4725 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
4727 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
4733 Check_Valid_Configuration_Pragma;
4734 Check_Arg_Count (1);
4735 Check_Optional_Identifier (Arg1, "max_size");
4737 Arg := Expression (Arg1);
4738 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
4740 Val := Expr_Value (Arg);
4744 ("maximum size for pragma% must be positive", Arg1);
4746 elsif UI_Is_In_Int_Range (Val) then
4747 Default_C_Record_Mechanism := UI_To_Int (Val);
4749 -- If a giant value is given, Int'Last will do well enough.
4750 -- If sometime someone complains that a record larger than
4751 -- two gigabytes is not copied, we will worry about it then!
4754 Default_C_Record_Mechanism := Mechanism_Type'Last;
4762 -- pragma Comment (static_string_EXPRESSION)
4764 -- Processing for pragma Comment shares the circuitry for
4765 -- pragma Ident. The only differences are that Ident enforces
4766 -- a limit of 31 characters on its argument, and also enforces
4767 -- limitations on placement for DEC compatibility. Pragma
4768 -- Comment shares neither of these restrictions.
4774 -- pragma Common_Object (
4775 -- [Internal =>] LOCAL_NAME,
4776 -- [, [External =>] EXTERNAL_SYMBOL]
4777 -- [, [Size =>] EXTERNAL_SYMBOL]);
4779 -- Processing for this pragma is shared with Psect_Object
4781 --------------------------
4782 -- Compile_Time_Warning --
4783 --------------------------
4785 -- pragma Compile_Time_Warning
4786 -- (boolean_EXPRESSION, static_string_EXPRESSION);
4788 when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
4789 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
4793 Check_Arg_Count (2);
4794 Check_No_Identifiers;
4795 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4796 Analyze_And_Resolve (Arg1x, Standard_Boolean);
4798 if Compile_Time_Known_Value (Arg1x) then
4799 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
4800 String_To_Name_Buffer (Strval (Get_Pragma_Arg (Arg2)));
4801 Add_Char_To_Name_Buffer ('?');
4804 Msg : String (1 .. Name_Len) :=
4805 Name_Buffer (1 .. Name_Len);
4810 -- This loop looks for multiple lines separated by
4811 -- ASCII.LF and breaks them into continuation error
4812 -- messages marked with the usual back slash.
4815 for S in 2 .. Msg'Length - 1 loop
4816 if Msg (S) = ASCII.LF then
4818 Error_Msg_N (Msg (B .. S), Arg1);
4824 Error_Msg_N (Msg (B .. Msg'Length), Arg1);
4828 end Compile_Time_Warning;
4830 ----------------------------
4831 -- Complex_Representation --
4832 ----------------------------
4834 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
4836 when Pragma_Complex_Representation => Complex_Representation : declare
4843 Check_Arg_Count (1);
4844 Check_Optional_Identifier (Arg1, Name_Entity);
4845 Check_Arg_Is_Local_Name (Arg1);
4846 E_Id := Expression (Arg1);
4848 if Etype (E_Id) = Any_Type then
4854 if not Is_Record_Type (E) then
4856 ("argument for pragma% must be record type", Arg1);
4859 Ent := First_Entity (E);
4862 or else No (Next_Entity (Ent))
4863 or else Present (Next_Entity (Next_Entity (Ent)))
4864 or else not Is_Floating_Point_Type (Etype (Ent))
4865 or else Etype (Ent) /= Etype (Next_Entity (Ent))
4868 ("record for pragma% must have two fields of same fpt type",
4872 Set_Has_Complex_Representation (Base_Type (E));
4874 end Complex_Representation;
4876 -------------------------
4877 -- Component_Alignment --
4878 -------------------------
4880 -- pragma Component_Alignment (
4881 -- [Form =>] ALIGNMENT_CHOICE
4882 -- [, [Name =>] type_LOCAL_NAME]);
4884 -- ALIGNMENT_CHOICE ::=
4886 -- | Component_Size_4
4890 when Pragma_Component_Alignment => Component_AlignmentP : declare
4891 Args : Args_List (1 .. 2);
4892 Names : constant Name_List (1 .. 2) := (
4896 Form : Node_Id renames Args (1);
4897 Name : Node_Id renames Args (2);
4899 Atype : Component_Alignment_Kind;
4904 Gather_Associations (Names, Args);
4907 Error_Pragma ("missing Form argument for pragma%");
4910 Check_Arg_Is_Identifier (Form);
4912 -- Get proper alignment, note that Default = Component_Size
4913 -- on all machines we have so far, and we want to set this
4914 -- value rather than the default value to indicate that it
4915 -- has been explicitly set (and thus will not get overridden
4916 -- by the default component alignment for the current scope)
4918 if Chars (Form) = Name_Component_Size then
4919 Atype := Calign_Component_Size;
4921 elsif Chars (Form) = Name_Component_Size_4 then
4922 Atype := Calign_Component_Size_4;
4924 elsif Chars (Form) = Name_Default then
4925 Atype := Calign_Component_Size;
4927 elsif Chars (Form) = Name_Storage_Unit then
4928 Atype := Calign_Storage_Unit;
4932 ("invalid Form parameter for pragma%", Form);
4935 -- Case with no name, supplied, affects scope table entry
4939 (Scope_Stack.Last).Component_Alignment_Default := Atype;
4941 -- Case of name supplied
4944 Check_Arg_Is_Local_Name (Name);
4946 Typ := Entity (Name);
4949 or else Rep_Item_Too_Early (Typ, N)
4953 Typ := Underlying_Type (Typ);
4956 if not Is_Record_Type (Typ)
4957 and then not Is_Array_Type (Typ)
4960 ("Name parameter of pragma% must identify record or " &
4961 "array type", Name);
4964 -- An explicit Component_Alignment pragma overrides an
4965 -- implicit pragma Pack, but not an explicit one.
4967 if not Has_Pragma_Pack (Base_Type (Typ)) then
4968 Set_Is_Packed (Base_Type (Typ), False);
4969 Set_Component_Alignment (Base_Type (Typ), Atype);
4972 end Component_AlignmentP;
4978 -- pragma Controlled (first_subtype_LOCAL_NAME);
4980 when Pragma_Controlled => Controlled : declare
4984 Check_No_Identifiers;
4985 Check_Arg_Count (1);
4986 Check_Arg_Is_Local_Name (Arg1);
4987 Arg := Expression (Arg1);
4989 if not Is_Entity_Name (Arg)
4990 or else not Is_Access_Type (Entity (Arg))
4992 Error_Pragma_Arg ("pragma% requires access type", Arg1);
4994 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
5002 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
5003 -- [Entity =>] LOCAL_NAME);
5005 when Pragma_Convention => Convention : declare
5009 Check_Ada_83_Warning;
5010 Check_Arg_Count (2);
5011 Process_Convention (C, E);
5014 ---------------------------
5015 -- Convention_Identifier --
5016 ---------------------------
5018 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
5019 -- [Convention =>] convention_IDENTIFIER);
5021 when Pragma_Convention_Identifier => Convention_Identifier : declare
5027 Check_Arg_Count (2);
5028 Check_Optional_Identifier (Arg1, Name_Name);
5029 Check_Optional_Identifier (Arg2, Name_Convention);
5030 Check_Arg_Is_Identifier (Arg1);
5031 Check_Arg_Is_Identifier (Arg1);
5032 Idnam := Chars (Expression (Arg1));
5033 Cname := Chars (Expression (Arg2));
5035 if Is_Convention_Name (Cname) then
5036 Record_Convention_Identifier
5037 (Idnam, Get_Convention_Id (Cname));
5040 ("second arg for % pragma must be convention", Arg2);
5042 end Convention_Identifier;
5048 -- pragma CPP_Class ([Entity =>] local_NAME)
5050 when Pragma_CPP_Class => CPP_Class : declare
5053 Default_DTC : Entity_Id := Empty;
5054 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
5060 Check_Arg_Count (1);
5061 Check_Optional_Identifier (Arg1, Name_Entity);
5062 Check_Arg_Is_Local_Name (Arg1);
5064 Arg := Expression (Arg1);
5067 if Etype (Arg) = Any_Type then
5071 if not Is_Entity_Name (Arg)
5072 or else not Is_Type (Entity (Arg))
5074 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
5077 Typ := Entity (Arg);
5079 if not Is_Record_Type (Typ) then
5080 Error_Pragma_Arg ("pragma% applicable to a record, "
5081 & "tagged record or record extension", Arg1);
5084 Default_DTC := First_Component (Typ);
5085 while Present (Default_DTC)
5086 and then Etype (Default_DTC) /= VTP_Type
5088 Next_Component (Default_DTC);
5091 -- Case of non tagged type
5093 if not Is_Tagged_Type (Typ) then
5094 Set_Is_CPP_Class (Typ);
5096 if Present (Default_DTC) then
5098 ("only tagged records can contain vtable pointers", Arg1);
5101 -- Case of tagged type with no vtable ptr
5103 -- What is test for Typ = Root_Typ (Typ) about here ???
5105 elsif Is_Tagged_Type (Typ)
5106 and then Typ = Root_Type (Typ)
5107 and then No (Default_DTC)
5110 ("a cpp_class must contain a vtable pointer", Arg1);
5112 -- Tagged type that has a vtable ptr
5114 elsif Present (Default_DTC) then
5115 Set_Is_CPP_Class (Typ);
5116 Set_Is_Limited_Record (Typ);
5117 Set_Is_Tag (Default_DTC);
5118 Set_DT_Entry_Count (Default_DTC, No_Uint);
5120 -- Since a CPP type has no direct link to its associated tag
5121 -- most tags checks cannot be performed
5123 Set_Kill_Tag_Checks (Typ);
5124 Set_Kill_Tag_Checks (Class_Wide_Type (Typ));
5126 -- Get rid of the _tag component when there was one.
5127 -- It is only useful for regular tagged types
5129 if Expander_Active and then Typ = Root_Type (Typ) then
5131 Tag_C := Tag_Component (Typ);
5132 C := First_Entity (Typ);
5135 Set_First_Entity (Typ, Next_Entity (Tag_C));
5138 while Next_Entity (C) /= Tag_C loop
5142 Set_Next_Entity (C, Next_Entity (Tag_C));
5148 ---------------------
5149 -- CPP_Constructor --
5150 ---------------------
5152 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME);
5154 when Pragma_CPP_Constructor => CPP_Constructor : declare
5160 Check_Arg_Count (1);
5161 Check_Optional_Identifier (Arg1, Name_Entity);
5162 Check_Arg_Is_Local_Name (Arg1);
5164 Id := Expression (Arg1);
5165 Find_Program_Unit_Name (Id);
5167 -- If we did not find the name, we are done
5169 if Etype (Id) = Any_Type then
5173 Def_Id := Entity (Id);
5175 if Ekind (Def_Id) = E_Function
5176 and then Is_Class_Wide_Type (Etype (Def_Id))
5177 and then Is_CPP_Class (Etype (Etype (Def_Id)))
5179 -- What the heck is this??? this pragma allows only 1 arg
5181 if Arg_Count >= 2 then
5182 Check_At_Most_N_Arguments (3);
5183 Process_Interface_Name (Def_Id, Arg2, Arg3);
5186 if No (Parameter_Specifications (Parent (Def_Id))) then
5187 Set_Has_Completion (Def_Id);
5188 Set_Is_Constructor (Def_Id);
5191 ("non-default constructors not implemented", Arg1);
5196 ("pragma% requires function returning a 'C'P'P_Class type",
5199 end CPP_Constructor;
5205 -- pragma CPP_Virtual
5206 -- [Entity =>] LOCAL_NAME
5207 -- [ [Vtable_Ptr =>] LOCAL_NAME,
5208 -- [Position =>] static_integer_EXPRESSION]);
5210 when Pragma_CPP_Virtual => CPP_Virtual : declare
5214 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
5221 if Arg_Count = 3 then
5222 Check_Optional_Identifier (Arg2, "vtable_ptr");
5224 -- We allow Entry_Count as well as Position for the third
5225 -- parameter for back compatibility with versions of GNAT
5226 -- before version 3.12. The documentation has always said
5227 -- Position, but the code up to 3.12 said Entry_Count.
5229 if Chars (Arg3) /= Name_Position then
5230 Check_Optional_Identifier (Arg3, "entry_count");
5234 Check_Arg_Count (1);
5237 Check_Optional_Identifier (Arg1, Name_Entity);
5238 Check_Arg_Is_Local_Name (Arg1);
5240 -- First argument must be a subprogram name
5242 Arg := Expression (Arg1);
5243 Find_Program_Unit_Name (Arg);
5245 if Etype (Arg) = Any_Type then
5248 Subp := Entity (Arg);
5251 if not (Is_Subprogram (Subp)
5252 and then Is_Dispatching_Operation (Subp))
5255 ("pragma% must reference a primitive operation", Arg1);
5258 Typ := Find_Dispatching_Type (Subp);
5260 -- If only one Argument defaults are :
5261 -- . DTC_Entity is the default Vtable pointer
5262 -- . DT_Position will be set at the freezing point
5264 if Arg_Count = 1 then
5265 Set_DTC_Entity (Subp, Tag_Component (Typ));
5269 -- Second argument is a component name of type Vtable_Ptr
5271 Arg := Expression (Arg2);
5273 if Nkind (Arg) /= N_Identifier then
5274 Error_Msg_NE ("must be a& component name", Arg, Typ);
5278 DTC := First_Component (Typ);
5279 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
5280 Next_Component (DTC);
5284 Error_Msg_NE ("must be a& component name", Arg, Typ);
5287 elsif Etype (DTC) /= VTP_Type then
5288 Wrong_Type (Arg, VTP_Type);
5292 -- Third argument is an integer (DT_Position)
5294 Arg := Expression (Arg3);
5295 Analyze_And_Resolve (Arg, Any_Integer);
5297 if not Is_Static_Expression (Arg) then
5298 Flag_Non_Static_Expr
5299 ("third argument of pragma CPP_Virtual must be static!",
5304 V := Expr_Value (Expression (Arg3));
5308 ("third argument of pragma% must be positive",
5312 Set_DTC_Entity (Subp, DTC);
5313 Set_DT_Position (Subp, V);
5322 -- pragma CPP_Vtable (
5323 -- [Entity =>] LOCAL_NAME
5324 -- [Vtable_Ptr =>] LOCAL_NAME,
5325 -- [Entry_Count =>] static_integer_EXPRESSION);
5327 when Pragma_CPP_Vtable => CPP_Vtable : declare
5330 VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
5337 Check_Arg_Count (3);
5338 Check_Optional_Identifier (Arg1, Name_Entity);
5339 Check_Optional_Identifier (Arg2, "vtable_ptr");
5340 Check_Optional_Identifier (Arg3, "entry_count");
5341 Check_Arg_Is_Local_Name (Arg1);
5343 -- First argument is a record type name
5345 Arg := Expression (Arg1);
5348 if Etype (Arg) = Any_Type then
5351 Typ := Entity (Arg);
5354 if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
5355 Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
5358 -- Second argument is a component name of type Vtable_Ptr
5360 Arg := Expression (Arg2);
5362 if Nkind (Arg) /= N_Identifier then
5363 Error_Msg_NE ("must be a& component name", Arg, Typ);
5367 DTC := First_Component (Typ);
5368 while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
5369 Next_Component (DTC);
5373 Error_Msg_NE ("must be a& component name", Arg, Typ);
5376 elsif Etype (DTC) /= VTP_Type then
5377 Wrong_Type (DTC, VTP_Type);
5380 -- If it is the first pragma Vtable, This becomes the default tag
5382 elsif (not Is_Tag (DTC))
5383 and then DT_Entry_Count (Tag_Component (Typ)) = No_Uint
5385 Set_Is_Tag (Tag_Component (Typ), False);
5386 Set_Is_Tag (DTC, True);
5387 Set_DT_Entry_Count (DTC, No_Uint);
5390 -- Those pragmas must appear before any primitive operation
5391 -- definition (except inherited ones) otherwise the default
5394 Elmt := First_Elmt (Primitive_Operations (Typ));
5395 while Present (Elmt) loop
5396 if No (Alias (Node (Elmt))) then
5397 Error_Msg_Sloc := Sloc (Node (Elmt));
5399 ("pragma% must appear before this primitive operation");
5405 -- Third argument is an integer (DT_Entry_Count)
5407 Arg := Expression (Arg3);
5408 Analyze_And_Resolve (Arg, Any_Integer);
5410 if not Is_Static_Expression (Arg) then
5411 Flag_Non_Static_Expr
5412 ("entry count for pragma CPP_Vtable must be a static " &
5413 "expression!", Arg3);
5417 V := Expr_Value (Expression (Arg3));
5421 ("entry count for pragma% must be positive", Arg3);
5423 Set_DT_Entry_Count (DTC, V);
5432 -- pragma Debug (PROCEDURE_CALL_STATEMENT);
5434 when Pragma_Debug => Debug : begin
5437 -- Rewrite into a conditional with a static condition
5439 Rewrite (N, Make_Implicit_If_Statement (N,
5440 Condition => New_Occurrence_Of (Boolean_Literals (
5441 Assertions_Enabled and Expander_Active), Loc),
5442 Then_Statements => New_List (
5443 Relocate_Node (Debug_Statement (N)))));
5447 ---------------------
5448 -- Detect_Blocking --
5449 ---------------------
5451 -- pragma Detect_Blocking;
5453 when Pragma_Detect_Blocking =>
5455 Check_Arg_Count (0);
5456 Check_Valid_Configuration_Pragma;
5457 Detect_Blocking := True;
5463 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
5465 when Pragma_Discard_Names => Discard_Names : declare
5470 Check_Ada_83_Warning;
5472 -- Deal with configuration pragma case
5474 if Arg_Count = 0 and then Is_Configuration_Pragma then
5475 Global_Discard_Names := True;
5478 -- Otherwise, check correct appropriate context
5481 Check_Is_In_Decl_Part_Or_Package_Spec;
5483 if Arg_Count = 0 then
5485 -- If there is no parameter, then from now on this pragma
5486 -- applies to any enumeration, exception or tagged type
5487 -- defined in the current declarative part.
5489 Set_Discard_Names (Current_Scope);
5493 Check_Arg_Count (1);
5494 Check_Optional_Identifier (Arg1, Name_On);
5495 Check_Arg_Is_Local_Name (Arg1);
5496 E_Id := Expression (Arg1);
5498 if Etype (E_Id) = Any_Type then
5504 if (Is_First_Subtype (E)
5505 and then (Is_Enumeration_Type (E)
5506 or else Is_Tagged_Type (E)))
5507 or else Ekind (E) = E_Exception
5509 Set_Discard_Names (E);
5512 ("inappropriate entity for pragma%", Arg1);
5522 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
5524 when Pragma_Elaborate => Elaborate : declare
5526 Parent_Node : Node_Id;
5531 -- Pragma must be in context items list of a compilation unit
5533 if not Is_List_Member (N) then
5538 Plist := List_Containing (N);
5539 Parent_Node := Parent (Plist);
5541 if Parent_Node = Empty
5542 or else Nkind (Parent_Node) /= N_Compilation_Unit
5543 or else Context_Items (Parent_Node) /= Plist
5550 -- Must be at least one argument
5552 if Arg_Count = 0 then
5553 Error_Pragma ("pragma% requires at least one argument");
5556 -- In Ada 83 mode, there can be no items following it in the
5557 -- context list except other pragmas and implicit with clauses
5558 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
5559 -- placement rule does not apply.
5561 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
5564 while Present (Citem) loop
5565 if Nkind (Citem) = N_Pragma
5566 or else (Nkind (Citem) = N_With_Clause
5567 and then Implicit_With (Citem))
5572 ("(Ada 83) pragma% must be at end of context clause");
5579 -- Finally, the arguments must all be units mentioned in a with
5580 -- clause in the same context clause. Note we already checked
5581 -- (in Par.Prag) that the arguments are either identifiers or
5584 Outer : while Present (Arg) loop
5585 Citem := First (Plist);
5587 Inner : while Citem /= N loop
5588 if Nkind (Citem) = N_With_Clause
5589 and then Same_Name (Name (Citem), Expression (Arg))
5591 Set_Elaborate_Present (Citem, True);
5592 Set_Unit_Name (Expression (Arg), Name (Citem));
5593 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5602 ("argument of pragma% is not with'ed unit", Arg);
5608 -- Give a warning if operating in static mode with -gnatwl
5609 -- (elaboration warnings eanbled) switch set.
5611 if Elab_Warnings and not Dynamic_Elaboration_Checks then
5613 ("?use of pragma Elaborate may not be safe", N);
5615 ("?use pragma Elaborate_All instead if possible", N);
5623 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
5625 when Pragma_Elaborate_All => Elaborate_All : declare
5627 Parent_Node : Node_Id;
5632 Check_Ada_83_Warning;
5634 -- Pragma must be in context items list of a compilation unit
5636 if not Is_List_Member (N) then
5641 Plist := List_Containing (N);
5642 Parent_Node := Parent (Plist);
5644 if Parent_Node = Empty
5645 or else Nkind (Parent_Node) /= N_Compilation_Unit
5646 or else Context_Items (Parent_Node) /= Plist
5653 -- Must be at least one argument
5655 if Arg_Count = 0 then
5656 Error_Pragma ("pragma% requires at least one argument");
5659 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
5660 -- have to appear at the end of the context clause, but may
5661 -- appear mixed in with other items, even in Ada 83 mode.
5663 -- Final check: the arguments must all be units mentioned in
5664 -- a with clause in the same context clause. Note that we
5665 -- already checked (in Par.Prag) that all the arguments are
5666 -- either identifiers or selected components.
5669 Outr : while Present (Arg) loop
5670 Citem := First (Plist);
5672 Innr : while Citem /= N loop
5673 if Nkind (Citem) = N_With_Clause
5674 and then Same_Name (Name (Citem), Expression (Arg))
5676 Set_Elaborate_All_Present (Citem, True);
5677 Set_Unit_Name (Expression (Arg), Name (Citem));
5678 Set_Suppress_Elaboration_Warnings (Entity (Name (Citem)));
5686 Set_Error_Posted (N);
5688 ("argument of pragma% is not with'ed unit", Arg);
5695 --------------------
5696 -- Elaborate_Body --
5697 --------------------
5699 -- pragma Elaborate_Body [( library_unit_NAME )];
5701 when Pragma_Elaborate_Body => Elaborate_Body : declare
5702 Cunit_Node : Node_Id;
5703 Cunit_Ent : Entity_Id;
5706 Check_Ada_83_Warning;
5707 Check_Valid_Library_Unit_Pragma;
5709 if Nkind (N) = N_Null_Statement then
5713 Cunit_Node := Cunit (Current_Sem_Unit);
5714 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
5716 if Nkind (Unit (Cunit_Node)) = N_Package_Body
5718 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
5720 Error_Pragma ("pragma% must refer to a spec, not a body");
5722 Set_Body_Required (Cunit_Node, True);
5723 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
5725 -- If we are in dynamic elaboration mode, then we suppress
5726 -- elaboration warnings for the unit, since it is definitely
5727 -- fine NOT to do dynamic checks at the first level (and such
5728 -- checks will be suppressed because no elaboration boolean
5729 -- is created for Elaborate_Body packages).
5731 -- But in the static model of elaboration, Elaborate_Body is
5732 -- definitely NOT good enough to ensure elaboration safety on
5733 -- its own, since the body may WITH other units that are not
5734 -- safe from an elaboration point of view, so a client must
5735 -- still do an Elaborate_All on such units.
5737 -- Debug flag -gnatdD restores the old behavior of 3.13,
5738 -- where Elaborate_Body always suppressed elab warnings.
5740 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
5741 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
5746 ------------------------
5747 -- Elaboration_Checks --
5748 ------------------------
5750 -- pragma Elaboration_Checks (Static | Dynamic);
5752 when Pragma_Elaboration_Checks =>
5754 Check_Arg_Count (1);
5755 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
5756 Dynamic_Elaboration_Checks :=
5757 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
5763 -- pragma Eliminate (
5764 -- [Unit_Name =>] IDENTIFIER |
5765 -- SELECTED_COMPONENT
5766 -- [,[Entity =>] IDENTIFIER |
5767 -- SELECTED_COMPONENT |
5769 -- [,]OVERLOADING_RESOLUTION);
5771 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
5774 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
5777 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
5779 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
5780 -- Result_Type => result_SUBTYPE_NAME]
5782 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
5783 -- SUBTYPE_NAME ::= STRING_LITERAL
5785 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
5786 -- SOURCE_TRACE ::= STRING_LITERAL
5788 when Pragma_Eliminate => Eliminate : declare
5789 Args : Args_List (1 .. 5);
5790 Names : constant Name_List (1 .. 5) := (
5793 Name_Parameter_Types,
5795 Name_Source_Location);
5797 Unit_Name : Node_Id renames Args (1);
5798 Entity : Node_Id renames Args (2);
5799 Parameter_Types : Node_Id renames Args (3);
5800 Result_Type : Node_Id renames Args (4);
5801 Source_Location : Node_Id renames Args (5);
5805 Check_Valid_Configuration_Pragma;
5806 Gather_Associations (Names, Args);
5808 if No (Unit_Name) then
5809 Error_Pragma ("missing Unit_Name argument for pragma%");
5813 and then (Present (Parameter_Types)
5815 Present (Result_Type)
5817 Present (Source_Location))
5819 Error_Pragma ("missing Entity argument for pragma%");
5822 if (Present (Parameter_Types)
5824 Present (Result_Type))
5826 Present (Source_Location)
5829 ("parameter profile and source location can not " &
5830 "be used together in pragma%");
5833 Process_Eliminate_Pragma
5842 -------------------------
5843 -- Explicit_Overriding --
5844 -------------------------
5846 when Pragma_Explicit_Overriding =>
5847 Check_Valid_Configuration_Pragma;
5848 Check_Arg_Count (0);
5849 Explicit_Overriding := True;
5856 -- [ Convention =>] convention_IDENTIFIER,
5857 -- [ Entity =>] local_NAME
5858 -- [, [External_Name =>] static_string_EXPRESSION ]
5859 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5861 when Pragma_Export => Export : declare
5866 Check_Ada_83_Warning;
5867 Check_At_Least_N_Arguments (2);
5868 Check_At_Most_N_Arguments (4);
5869 Process_Convention (C, Def_Id);
5871 if Ekind (Def_Id) /= E_Constant then
5872 Note_Possible_Modification (Expression (Arg2));
5875 Process_Interface_Name (Def_Id, Arg3, Arg4);
5876 Set_Exported (Def_Id, Arg2);
5879 ----------------------
5880 -- Export_Exception --
5881 ----------------------
5883 -- pragma Export_Exception (
5884 -- [Internal =>] LOCAL_NAME,
5885 -- [, [External =>] EXTERNAL_SYMBOL,]
5886 -- [, [Form =>] Ada | VMS]
5887 -- [, [Code =>] static_integer_EXPRESSION]);
5889 when Pragma_Export_Exception => Export_Exception : declare
5890 Args : Args_List (1 .. 4);
5891 Names : constant Name_List (1 .. 4) := (
5897 Internal : Node_Id renames Args (1);
5898 External : Node_Id renames Args (2);
5899 Form : Node_Id renames Args (3);
5900 Code : Node_Id renames Args (4);
5903 if Inside_A_Generic then
5904 Error_Pragma ("pragma% cannot be used for generic entities");
5907 Gather_Associations (Names, Args);
5908 Process_Extended_Import_Export_Exception_Pragma (
5909 Arg_Internal => Internal,
5910 Arg_External => External,
5914 if not Is_VMS_Exception (Entity (Internal)) then
5915 Set_Exported (Entity (Internal), Internal);
5917 end Export_Exception;
5919 ---------------------
5920 -- Export_Function --
5921 ---------------------
5923 -- pragma Export_Function (
5924 -- [Internal =>] LOCAL_NAME,
5925 -- [, [External =>] EXTERNAL_SYMBOL,]
5926 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
5927 -- [, [Result_Type =>] TYPE_DESIGNATOR]
5928 -- [, [Mechanism =>] MECHANISM]
5929 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
5931 -- EXTERNAL_SYMBOL ::=
5933 -- | static_string_EXPRESSION
5935 -- PARAMETER_TYPES ::=
5937 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
5939 -- TYPE_DESIGNATOR ::=
5941 -- | subtype_Name ' Access
5945 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
5947 -- MECHANISM_ASSOCIATION ::=
5948 -- [formal_parameter_NAME =>] MECHANISM_NAME
5950 -- MECHANISM_NAME ::=
5953 -- | Descriptor [([Class =>] CLASS_NAME)]
5955 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
5957 when Pragma_Export_Function => Export_Function : declare
5958 Args : Args_List (1 .. 6);
5959 Names : constant Name_List (1 .. 6) := (
5962 Name_Parameter_Types,
5965 Name_Result_Mechanism);
5967 Internal : Node_Id renames Args (1);
5968 External : Node_Id renames Args (2);
5969 Parameter_Types : Node_Id renames Args (3);
5970 Result_Type : Node_Id renames Args (4);
5971 Mechanism : Node_Id renames Args (5);
5972 Result_Mechanism : Node_Id renames Args (6);
5976 Gather_Associations (Names, Args);
5977 Process_Extended_Import_Export_Subprogram_Pragma (
5978 Arg_Internal => Internal,
5979 Arg_External => External,
5980 Arg_Parameter_Types => Parameter_Types,
5981 Arg_Result_Type => Result_Type,
5982 Arg_Mechanism => Mechanism,
5983 Arg_Result_Mechanism => Result_Mechanism);
5984 end Export_Function;
5990 -- pragma Export_Object (
5991 -- [Internal =>] LOCAL_NAME,
5992 -- [, [External =>] EXTERNAL_SYMBOL]
5993 -- [, [Size =>] EXTERNAL_SYMBOL]);
5995 -- EXTERNAL_SYMBOL ::=
5997 -- | static_string_EXPRESSION
5999 -- PARAMETER_TYPES ::=
6001 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6003 -- TYPE_DESIGNATOR ::=
6005 -- | subtype_Name ' Access
6009 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6011 -- MECHANISM_ASSOCIATION ::=
6012 -- [formal_parameter_NAME =>] MECHANISM_NAME
6014 -- MECHANISM_NAME ::=
6017 -- | Descriptor [([Class =>] CLASS_NAME)]
6019 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6021 when Pragma_Export_Object => Export_Object : declare
6022 Args : Args_List (1 .. 3);
6023 Names : constant Name_List (1 .. 3) := (
6028 Internal : Node_Id renames Args (1);
6029 External : Node_Id renames Args (2);
6030 Size : Node_Id renames Args (3);
6034 Gather_Associations (Names, Args);
6035 Process_Extended_Import_Export_Object_Pragma (
6036 Arg_Internal => Internal,
6037 Arg_External => External,
6041 ----------------------
6042 -- Export_Procedure --
6043 ----------------------
6045 -- pragma Export_Procedure (
6046 -- [Internal =>] LOCAL_NAME,
6047 -- [, [External =>] EXTERNAL_SYMBOL,]
6048 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6049 -- [, [Mechanism =>] MECHANISM]);
6051 -- EXTERNAL_SYMBOL ::=
6053 -- | static_string_EXPRESSION
6055 -- PARAMETER_TYPES ::=
6057 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6059 -- TYPE_DESIGNATOR ::=
6061 -- | subtype_Name ' Access
6065 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6067 -- MECHANISM_ASSOCIATION ::=
6068 -- [formal_parameter_NAME =>] MECHANISM_NAME
6070 -- MECHANISM_NAME ::=
6073 -- | Descriptor [([Class =>] CLASS_NAME)]
6075 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6077 when Pragma_Export_Procedure => Export_Procedure : declare
6078 Args : Args_List (1 .. 4);
6079 Names : constant Name_List (1 .. 4) := (
6082 Name_Parameter_Types,
6085 Internal : Node_Id renames Args (1);
6086 External : Node_Id renames Args (2);
6087 Parameter_Types : Node_Id renames Args (3);
6088 Mechanism : Node_Id renames Args (4);
6092 Gather_Associations (Names, Args);
6093 Process_Extended_Import_Export_Subprogram_Pragma (
6094 Arg_Internal => Internal,
6095 Arg_External => External,
6096 Arg_Parameter_Types => Parameter_Types,
6097 Arg_Mechanism => Mechanism);
6098 end Export_Procedure;
6104 -- pragma Export_Value (
6105 -- [Value =>] static_integer_EXPRESSION,
6106 -- [Link_Name =>] static_string_EXPRESSION);
6108 when Pragma_Export_Value =>
6110 Check_Arg_Count (2);
6112 Check_Optional_Identifier (Arg1, Name_Value);
6113 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6115 Check_Optional_Identifier (Arg2, Name_Link_Name);
6116 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
6118 -----------------------------
6119 -- Export_Valued_Procedure --
6120 -----------------------------
6122 -- pragma Export_Valued_Procedure (
6123 -- [Internal =>] LOCAL_NAME,
6124 -- [, [External =>] EXTERNAL_SYMBOL,]
6125 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6126 -- [, [Mechanism =>] MECHANISM]);
6128 -- EXTERNAL_SYMBOL ::=
6130 -- | static_string_EXPRESSION
6132 -- PARAMETER_TYPES ::=
6134 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6136 -- TYPE_DESIGNATOR ::=
6138 -- | subtype_Name ' Access
6142 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6144 -- MECHANISM_ASSOCIATION ::=
6145 -- [formal_parameter_NAME =>] MECHANISM_NAME
6147 -- MECHANISM_NAME ::=
6150 -- | Descriptor [([Class =>] CLASS_NAME)]
6152 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6154 when Pragma_Export_Valued_Procedure =>
6155 Export_Valued_Procedure : declare
6156 Args : Args_List (1 .. 4);
6157 Names : constant Name_List (1 .. 4) := (
6160 Name_Parameter_Types,
6163 Internal : Node_Id renames Args (1);
6164 External : Node_Id renames Args (2);
6165 Parameter_Types : Node_Id renames Args (3);
6166 Mechanism : Node_Id renames Args (4);
6170 Gather_Associations (Names, Args);
6171 Process_Extended_Import_Export_Subprogram_Pragma (
6172 Arg_Internal => Internal,
6173 Arg_External => External,
6174 Arg_Parameter_Types => Parameter_Types,
6175 Arg_Mechanism => Mechanism);
6176 end Export_Valued_Procedure;
6182 -- pragma Extend_System ([Name =>] Identifier);
6184 when Pragma_Extend_System => Extend_System : declare
6187 Check_Valid_Configuration_Pragma;
6188 Check_Arg_Count (1);
6189 Check_Optional_Identifier (Arg1, Name_Name);
6190 Check_Arg_Is_Identifier (Arg1);
6192 Get_Name_String (Chars (Expression (Arg1)));
6195 and then Name_Buffer (1 .. 4) = "aux_"
6197 if Present (System_Extend_Pragma_Arg) then
6198 if Chars (Expression (Arg1)) =
6199 Chars (Expression (System_Extend_Pragma_Arg))
6203 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
6204 Error_Pragma ("pragma% conflicts with that at#");
6208 System_Extend_Pragma_Arg := Arg1;
6210 if not GNAT_Mode then
6211 System_Extend_Unit := Arg1;
6215 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
6219 ------------------------
6220 -- Extensions_Allowed --
6221 ------------------------
6223 -- pragma Extensions_Allowed (ON | OFF);
6225 when Pragma_Extensions_Allowed =>
6227 Check_Arg_Count (1);
6228 Check_No_Identifiers;
6229 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
6231 if Chars (Expression (Arg1)) = Name_On then
6232 Extensions_Allowed := True;
6233 Ada_Version := Ada_Version_Type'Last;
6235 Extensions_Allowed := False;
6236 Ada_Version := Ada_Version_Type'Min (Ada_Version, Ada_95);
6243 -- pragma External (
6244 -- [ Convention =>] convention_IDENTIFIER,
6245 -- [ Entity =>] local_NAME
6246 -- [, [External_Name =>] static_string_EXPRESSION ]
6247 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6249 when Pragma_External => External : declare
6255 Check_At_Least_N_Arguments (2);
6256 Check_At_Most_N_Arguments (4);
6257 Process_Convention (C, Def_Id);
6258 Note_Possible_Modification (Expression (Arg2));
6259 Process_Interface_Name (Def_Id, Arg3, Arg4);
6260 Set_Exported (Def_Id, Arg2);
6263 --------------------------
6264 -- External_Name_Casing --
6265 --------------------------
6267 -- pragma External_Name_Casing (
6268 -- UPPERCASE | LOWERCASE
6269 -- [, AS_IS | UPPERCASE | LOWERCASE]);
6271 when Pragma_External_Name_Casing => External_Name_Casing : declare
6274 Check_No_Identifiers;
6276 if Arg_Count = 2 then
6278 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
6280 case Chars (Get_Pragma_Arg (Arg2)) is
6282 Opt.External_Name_Exp_Casing := As_Is;
6284 when Name_Uppercase =>
6285 Opt.External_Name_Exp_Casing := Uppercase;
6287 when Name_Lowercase =>
6288 Opt.External_Name_Exp_Casing := Lowercase;
6295 Check_Arg_Count (1);
6298 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
6300 case Chars (Get_Pragma_Arg (Arg1)) is
6301 when Name_Uppercase =>
6302 Opt.External_Name_Imp_Casing := Uppercase;
6304 when Name_Lowercase =>
6305 Opt.External_Name_Imp_Casing := Lowercase;
6310 end External_Name_Casing;
6312 ---------------------------
6313 -- Finalize_Storage_Only --
6314 ---------------------------
6316 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
6318 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
6319 Assoc : constant Node_Id := Arg1;
6320 Type_Id : constant Node_Id := Expression (Assoc);
6324 Check_No_Identifiers;
6325 Check_Arg_Count (1);
6326 Check_Arg_Is_Local_Name (Arg1);
6328 Find_Type (Type_Id);
6329 Typ := Entity (Type_Id);
6332 or else Rep_Item_Too_Early (Typ, N)
6336 Typ := Underlying_Type (Typ);
6339 if not Is_Controlled (Typ) then
6340 Error_Pragma ("pragma% must specify controlled type");
6343 Check_First_Subtype (Arg1);
6345 if Finalize_Storage_Only (Typ) then
6346 Error_Pragma ("duplicate pragma%, only one allowed");
6348 elsif not Rep_Item_Too_Late (Typ, N) then
6349 Set_Finalize_Storage_Only (Base_Type (Typ), True);
6351 end Finalize_Storage;
6353 --------------------------
6354 -- Float_Representation --
6355 --------------------------
6357 -- pragma Float_Representation (VAX_Float | IEEE_Float);
6359 when Pragma_Float_Representation => Float_Representation : declare
6367 if Arg_Count = 1 then
6368 Check_Valid_Configuration_Pragma;
6370 Check_Arg_Count (2);
6371 Check_Optional_Identifier (Arg2, Name_Entity);
6372 Check_Arg_Is_Local_Name (Arg2);
6375 Check_No_Identifier (Arg1);
6376 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
6378 if not OpenVMS_On_Target then
6379 if Chars (Expression (Arg1)) = Name_VAX_Float then
6381 ("?pragma% ignored (applies only to Open'V'M'S)");
6387 -- One argument case
6389 if Arg_Count = 1 then
6391 if Chars (Expression (Arg1)) = Name_VAX_Float then
6393 if Opt.Float_Format = 'I' then
6394 Error_Pragma ("'I'E'E'E format previously specified");
6397 Opt.Float_Format := 'V';
6400 if Opt.Float_Format = 'V' then
6401 Error_Pragma ("'V'A'X format previously specified");
6404 Opt.Float_Format := 'I';
6407 Set_Standard_Fpt_Formats;
6409 -- Two argument case
6412 Argx := Get_Pragma_Arg (Arg2);
6414 if not Is_Entity_Name (Argx)
6415 or else not Is_Floating_Point_Type (Entity (Argx))
6418 ("second argument of% pragma must be floating-point type",
6422 Ent := Entity (Argx);
6423 Digs := UI_To_Int (Digits_Value (Ent));
6425 -- Two arguments, VAX_Float case
6427 if Chars (Expression (Arg1)) = Name_VAX_Float then
6430 when 6 => Set_F_Float (Ent);
6431 when 9 => Set_D_Float (Ent);
6432 when 15 => Set_G_Float (Ent);
6436 ("wrong digits value, must be 6,9 or 15", Arg2);
6439 -- Two arguments, IEEE_Float case
6443 when 6 => Set_IEEE_Short (Ent);
6444 when 15 => Set_IEEE_Long (Ent);
6448 ("wrong digits value, must be 6 or 15", Arg2);
6452 end Float_Representation;
6458 -- pragma Ident (static_string_EXPRESSION)
6460 -- Note: pragma Comment shares this processing. Pragma Comment
6461 -- is identical to Ident, except that the restriction of the
6462 -- argument to 31 characters and the placement restrictions
6463 -- are not enforced for pragma Comment.
6465 when Pragma_Ident | Pragma_Comment => Ident : declare
6470 Check_Arg_Count (1);
6471 Check_No_Identifiers;
6472 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
6474 -- For pragma Ident, preserve DEC compatibility by requiring
6475 -- the pragma to appear in a declarative part or package spec.
6477 if Prag_Id = Pragma_Ident then
6478 Check_Is_In_Decl_Part_Or_Package_Spec;
6481 Str := Expr_Value_S (Expression (Arg1));
6488 GP := Parent (Parent (N));
6490 if Nkind (GP) = N_Package_Declaration
6492 Nkind (GP) = N_Generic_Package_Declaration
6497 -- If we have a compilation unit, then record the ident
6498 -- value, checking for improper duplication.
6500 if Nkind (GP) = N_Compilation_Unit then
6501 CS := Ident_String (Current_Sem_Unit);
6503 if Present (CS) then
6505 -- For Ident, we do not permit multiple instances
6507 if Prag_Id = Pragma_Ident then
6508 Error_Pragma ("duplicate% pragma not permitted");
6510 -- For Comment, we concatenate the string, unless we
6511 -- want to preserve the tree structure for ASIS.
6513 elsif not ASIS_Mode then
6514 Start_String (Strval (CS));
6515 Store_String_Char (' ');
6516 Store_String_Chars (Strval (Str));
6517 Set_Strval (CS, End_String);
6521 -- In VMS, the effect of IDENT is achieved by passing
6522 -- IDENTIFICATION=name as a --for-linker switch.
6524 if OpenVMS_On_Target then
6527 ("--for-linker=IDENTIFICATION=");
6528 String_To_Name_Buffer (Strval (Str));
6529 Store_String_Chars (Name_Buffer (1 .. Name_Len));
6531 -- Only the last processed IDENT is saved. The main
6532 -- purpose is so an IDENT associated with a main
6533 -- procedure will be used in preference to an IDENT
6534 -- associated with a with'd package.
6536 Replace_Linker_Option_String
6537 (End_String, "--for-linker=IDENTIFICATION=");
6540 Set_Ident_String (Current_Sem_Unit, Str);
6543 -- For subunits, we just ignore the Ident, since in GNAT
6544 -- these are not separate object files, and hence not
6545 -- separate units in the unit table.
6547 elsif Nkind (GP) = N_Subunit then
6550 -- Otherwise we have a misplaced pragma Ident, but we ignore
6551 -- this if we are in an instantiation, since it comes from
6552 -- a generic, and has no relevance to the instantiation.
6554 elsif Prag_Id = Pragma_Ident then
6555 if Instantiation_Location (Loc) = No_Location then
6556 Error_Pragma ("pragma% only allowed at outer level");
6567 -- [ Convention =>] convention_IDENTIFIER,
6568 -- [ Entity =>] local_NAME
6569 -- [, [External_Name =>] static_string_EXPRESSION ]
6570 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6572 when Pragma_Import =>
6573 Check_Ada_83_Warning;
6574 Check_At_Least_N_Arguments (2);
6575 Check_At_Most_N_Arguments (4);
6576 Process_Import_Or_Interface;
6578 ----------------------
6579 -- Import_Exception --
6580 ----------------------
6582 -- pragma Import_Exception (
6583 -- [Internal =>] LOCAL_NAME,
6584 -- [, [External =>] EXTERNAL_SYMBOL,]
6585 -- [, [Form =>] Ada | VMS]
6586 -- [, [Code =>] static_integer_EXPRESSION]);
6588 when Pragma_Import_Exception => Import_Exception : declare
6589 Args : Args_List (1 .. 4);
6590 Names : constant Name_List (1 .. 4) := (
6596 Internal : Node_Id renames Args (1);
6597 External : Node_Id renames Args (2);
6598 Form : Node_Id renames Args (3);
6599 Code : Node_Id renames Args (4);
6602 Gather_Associations (Names, Args);
6604 if Present (External) and then Present (Code) then
6606 ("cannot give both External and Code options for pragma%");
6609 Process_Extended_Import_Export_Exception_Pragma (
6610 Arg_Internal => Internal,
6611 Arg_External => External,
6615 if not Is_VMS_Exception (Entity (Internal)) then
6616 Set_Imported (Entity (Internal));
6618 end Import_Exception;
6620 ---------------------
6621 -- Import_Function --
6622 ---------------------
6624 -- pragma Import_Function (
6625 -- [Internal =>] LOCAL_NAME,
6626 -- [, [External =>] EXTERNAL_SYMBOL]
6627 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6628 -- [, [Result_Type =>] SUBTYPE_MARK]
6629 -- [, [Mechanism =>] MECHANISM]
6630 -- [, [Result_Mechanism =>] MECHANISM_NAME]
6631 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6633 -- EXTERNAL_SYMBOL ::=
6635 -- | static_string_EXPRESSION
6637 -- PARAMETER_TYPES ::=
6639 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6641 -- TYPE_DESIGNATOR ::=
6643 -- | subtype_Name ' Access
6647 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6649 -- MECHANISM_ASSOCIATION ::=
6650 -- [formal_parameter_NAME =>] MECHANISM_NAME
6652 -- MECHANISM_NAME ::=
6655 -- | Descriptor [([Class =>] CLASS_NAME)]
6657 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6659 when Pragma_Import_Function => Import_Function : declare
6660 Args : Args_List (1 .. 7);
6661 Names : constant Name_List (1 .. 7) := (
6664 Name_Parameter_Types,
6667 Name_Result_Mechanism,
6668 Name_First_Optional_Parameter);
6670 Internal : Node_Id renames Args (1);
6671 External : Node_Id renames Args (2);
6672 Parameter_Types : Node_Id renames Args (3);
6673 Result_Type : Node_Id renames Args (4);
6674 Mechanism : Node_Id renames Args (5);
6675 Result_Mechanism : Node_Id renames Args (6);
6676 First_Optional_Parameter : Node_Id renames Args (7);
6680 Gather_Associations (Names, Args);
6681 Process_Extended_Import_Export_Subprogram_Pragma (
6682 Arg_Internal => Internal,
6683 Arg_External => External,
6684 Arg_Parameter_Types => Parameter_Types,
6685 Arg_Result_Type => Result_Type,
6686 Arg_Mechanism => Mechanism,
6687 Arg_Result_Mechanism => Result_Mechanism,
6688 Arg_First_Optional_Parameter => First_Optional_Parameter);
6689 end Import_Function;
6695 -- pragma Import_Object (
6696 -- [Internal =>] LOCAL_NAME,
6697 -- [, [External =>] EXTERNAL_SYMBOL]
6698 -- [, [Size =>] EXTERNAL_SYMBOL]);
6700 -- EXTERNAL_SYMBOL ::=
6702 -- | static_string_EXPRESSION
6704 when Pragma_Import_Object => Import_Object : declare
6705 Args : Args_List (1 .. 3);
6706 Names : constant Name_List (1 .. 3) := (
6711 Internal : Node_Id renames Args (1);
6712 External : Node_Id renames Args (2);
6713 Size : Node_Id renames Args (3);
6717 Gather_Associations (Names, Args);
6718 Process_Extended_Import_Export_Object_Pragma (
6719 Arg_Internal => Internal,
6720 Arg_External => External,
6724 ----------------------
6725 -- Import_Procedure --
6726 ----------------------
6728 -- pragma Import_Procedure (
6729 -- [Internal =>] LOCAL_NAME,
6730 -- [, [External =>] EXTERNAL_SYMBOL]
6731 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6732 -- [, [Mechanism =>] MECHANISM]
6733 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6735 -- EXTERNAL_SYMBOL ::=
6737 -- | static_string_EXPRESSION
6739 -- PARAMETER_TYPES ::=
6741 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6743 -- TYPE_DESIGNATOR ::=
6745 -- | subtype_Name ' Access
6749 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6751 -- MECHANISM_ASSOCIATION ::=
6752 -- [formal_parameter_NAME =>] MECHANISM_NAME
6754 -- MECHANISM_NAME ::=
6757 -- | Descriptor [([Class =>] CLASS_NAME)]
6759 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6761 when Pragma_Import_Procedure => Import_Procedure : declare
6762 Args : Args_List (1 .. 5);
6763 Names : constant Name_List (1 .. 5) := (
6766 Name_Parameter_Types,
6768 Name_First_Optional_Parameter);
6770 Internal : Node_Id renames Args (1);
6771 External : Node_Id renames Args (2);
6772 Parameter_Types : Node_Id renames Args (3);
6773 Mechanism : Node_Id renames Args (4);
6774 First_Optional_Parameter : Node_Id renames Args (5);
6778 Gather_Associations (Names, Args);
6779 Process_Extended_Import_Export_Subprogram_Pragma (
6780 Arg_Internal => Internal,
6781 Arg_External => External,
6782 Arg_Parameter_Types => Parameter_Types,
6783 Arg_Mechanism => Mechanism,
6784 Arg_First_Optional_Parameter => First_Optional_Parameter);
6785 end Import_Procedure;
6787 -----------------------------
6788 -- Import_Valued_Procedure --
6789 -----------------------------
6791 -- pragma Import_Valued_Procedure (
6792 -- [Internal =>] LOCAL_NAME,
6793 -- [, [External =>] EXTERNAL_SYMBOL]
6794 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6795 -- [, [Mechanism =>] MECHANISM]
6796 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6798 -- EXTERNAL_SYMBOL ::=
6800 -- | static_string_EXPRESSION
6802 -- PARAMETER_TYPES ::=
6804 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6806 -- TYPE_DESIGNATOR ::=
6808 -- | subtype_Name ' Access
6812 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6814 -- MECHANISM_ASSOCIATION ::=
6815 -- [formal_parameter_NAME =>] MECHANISM_NAME
6817 -- MECHANISM_NAME ::=
6820 -- | Descriptor [([Class =>] CLASS_NAME)]
6822 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6824 when Pragma_Import_Valued_Procedure =>
6825 Import_Valued_Procedure : declare
6826 Args : Args_List (1 .. 5);
6827 Names : constant Name_List (1 .. 5) := (
6830 Name_Parameter_Types,
6832 Name_First_Optional_Parameter);
6834 Internal : Node_Id renames Args (1);
6835 External : Node_Id renames Args (2);
6836 Parameter_Types : Node_Id renames Args (3);
6837 Mechanism : Node_Id renames Args (4);
6838 First_Optional_Parameter : Node_Id renames Args (5);
6842 Gather_Associations (Names, Args);
6843 Process_Extended_Import_Export_Subprogram_Pragma (
6844 Arg_Internal => Internal,
6845 Arg_External => External,
6846 Arg_Parameter_Types => Parameter_Types,
6847 Arg_Mechanism => Mechanism,
6848 Arg_First_Optional_Parameter => First_Optional_Parameter);
6849 end Import_Valued_Procedure;
6851 ------------------------
6852 -- Initialize_Scalars --
6853 ------------------------
6855 -- pragma Initialize_Scalars;
6857 when Pragma_Initialize_Scalars =>
6859 Check_Arg_Count (0);
6860 Check_Valid_Configuration_Pragma;
6861 Check_Restriction (No_Initialize_Scalars, N);
6863 if not Restriction_Active (No_Initialize_Scalars) then
6864 Init_Or_Norm_Scalars := True;
6865 Initialize_Scalars := True;
6872 -- pragma Inline ( NAME {, NAME} );
6874 when Pragma_Inline =>
6876 -- Pragma is active if inlining option is active
6878 Process_Inline (Inline_Active);
6884 -- pragma Inline_Always ( NAME {, NAME} );
6886 when Pragma_Inline_Always =>
6887 Process_Inline (True);
6889 --------------------
6890 -- Inline_Generic --
6891 --------------------
6893 -- pragma Inline_Generic (NAME {, NAME});
6895 when Pragma_Inline_Generic =>
6896 Process_Generic_List;
6898 ----------------------
6899 -- Inspection_Point --
6900 ----------------------
6902 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
6904 when Pragma_Inspection_Point => Inspection_Point : declare
6909 if Arg_Count > 0 then
6912 Exp := Expression (Arg);
6915 if not Is_Entity_Name (Exp)
6916 or else not Is_Object (Entity (Exp))
6918 Error_Pragma_Arg ("object name required", Arg);
6925 end Inspection_Point;
6931 -- pragma Interface (
6932 -- convention_IDENTIFIER,
6935 when Pragma_Interface =>
6937 Check_Arg_Count (2);
6938 Check_No_Identifiers;
6939 Process_Import_Or_Interface;
6941 --------------------
6942 -- Interface_Name --
6943 --------------------
6945 -- pragma Interface_Name (
6946 -- [ Entity =>] local_NAME
6947 -- [,[External_Name =>] static_string_EXPRESSION ]
6948 -- [,[Link_Name =>] static_string_EXPRESSION ]);
6950 when Pragma_Interface_Name => Interface_Name : declare
6958 Check_At_Least_N_Arguments (2);
6959 Check_At_Most_N_Arguments (3);
6960 Id := Expression (Arg1);
6963 if not Is_Entity_Name (Id) then
6965 ("first argument for pragma% must be entity name", Arg1);
6966 elsif Etype (Id) = Any_Type then
6969 Def_Id := Entity (Id);
6972 -- Special DEC-compatible processing for the object case,
6973 -- forces object to be imported.
6975 if Ekind (Def_Id) = E_Variable then
6976 Kill_Size_Check_Code (Def_Id);
6977 Note_Possible_Modification (Id);
6979 -- Initialization is not allowed for imported variable
6981 if Present (Expression (Parent (Def_Id)))
6982 and then Comes_From_Source (Expression (Parent (Def_Id)))
6984 Error_Msg_Sloc := Sloc (Def_Id);
6986 ("no initialization allowed for declaration of& #",
6990 -- For compatibility, support VADS usage of providing both
6991 -- pragmas Interface and Interface_Name to obtain the effect
6992 -- of a single Import pragma.
6994 if Is_Imported (Def_Id)
6995 and then Present (First_Rep_Item (Def_Id))
6996 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
6997 and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
7001 Set_Imported (Def_Id);
7004 Set_Is_Public (Def_Id);
7005 Process_Interface_Name (Def_Id, Arg2, Arg3);
7008 -- Otherwise must be subprogram
7010 elsif not Is_Subprogram (Def_Id) then
7012 ("argument of pragma% is not subprogram", Arg1);
7015 Check_At_Most_N_Arguments (3);
7019 -- Loop through homonyms
7022 Def_Id := Get_Base_Subprogram (Hom_Id);
7024 if Is_Imported (Def_Id) then
7025 Process_Interface_Name (Def_Id, Arg2, Arg3);
7029 Hom_Id := Homonym (Hom_Id);
7031 exit when No (Hom_Id)
7032 or else Scope (Hom_Id) /= Current_Scope;
7037 ("argument of pragma% is not imported subprogram",
7043 -----------------------
7044 -- Interrupt_Handler --
7045 -----------------------
7047 -- pragma Interrupt_Handler (handler_NAME);
7049 when Pragma_Interrupt_Handler =>
7050 Check_Ada_83_Warning;
7051 Check_Arg_Count (1);
7052 Check_No_Identifiers;
7054 if No_Run_Time_Mode then
7055 Error_Msg_CRT ("Interrupt_Handler pragma", N);
7057 Check_Interrupt_Or_Attach_Handler;
7058 Process_Interrupt_Or_Attach_Handler;
7061 ------------------------
7062 -- Interrupt_Priority --
7063 ------------------------
7065 -- pragma Interrupt_Priority [(EXPRESSION)];
7067 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
7068 P : constant Node_Id := Parent (N);
7072 Check_Ada_83_Warning;
7074 if Arg_Count /= 0 then
7075 Arg := Expression (Arg1);
7076 Check_Arg_Count (1);
7077 Check_No_Identifiers;
7079 -- The expression must be analyzed in the special manner
7080 -- described in "Handling of Default and Per-Object
7081 -- Expressions" in sem.ads.
7083 Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
7086 if Nkind (P) /= N_Task_Definition
7087 and then Nkind (P) /= N_Protected_Definition
7092 elsif Has_Priority_Pragma (P) then
7093 Error_Pragma ("duplicate pragma% not allowed");
7096 Set_Has_Priority_Pragma (P, True);
7097 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7099 end Interrupt_Priority;
7101 ---------------------
7102 -- Interrupt_State --
7103 ---------------------
7105 -- pragma Interrupt_State (
7106 -- [Name =>] INTERRUPT_ID,
7107 -- [State =>] INTERRUPT_STATE);
7109 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
7110 -- INTERRUPT_STATE => System | Runtime | User
7112 -- Note: if the interrupt id is given as an identifier, then
7113 -- it must be one of the identifiers in Ada.Interrupts.Names.
7114 -- Otherwise it is given as a static integer expression which
7115 -- must be in the range of Ada.Interrupts.Interrupt_ID.
7117 when Pragma_Interrupt_State => Interrupt_State : declare
7119 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
7120 -- This is the entity Ada.Interrupts.Interrupt_ID;
7122 State_Type : Character;
7123 -- Set to 's'/'r'/'u' for System/Runtime/User
7126 -- Index to entry in Interrupt_States table
7129 -- Value of interrupt
7131 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
7132 -- The first argument to the pragma
7134 Int_Ent : Entity_Id;
7135 -- Interrupt entity in Ada.Interrupts.Names
7139 Check_Arg_Count (2);
7141 Check_Optional_Identifier (Arg1, Name_Name);
7142 Check_Optional_Identifier (Arg2, "state");
7143 Check_Arg_Is_Identifier (Arg2);
7145 -- First argument is identifier
7147 if Nkind (Arg1X) = N_Identifier then
7149 -- Search list of names in Ada.Interrupts.Names
7151 Int_Ent := First_Entity (RTE (RE_Names));
7153 if No (Int_Ent) then
7154 Error_Pragma_Arg ("invalid interrupt name", Arg1);
7156 elsif Chars (Int_Ent) = Chars (Arg1X) then
7157 Int_Val := Expr_Value (Constant_Value (Int_Ent));
7161 Next_Entity (Int_Ent);
7164 -- First argument is not an identifier, so it must be a
7165 -- static expression of type Ada.Interrupts.Interrupt_ID.
7168 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
7169 Int_Val := Expr_Value (Arg1X);
7171 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
7173 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
7176 ("value not in range of type " &
7177 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
7183 case Chars (Get_Pragma_Arg (Arg2)) is
7184 when Name_Runtime => State_Type := 'r';
7185 when Name_System => State_Type := 's';
7186 when Name_User => State_Type := 'u';
7189 Error_Pragma_Arg ("invalid interrupt state", Arg2);
7192 -- Check if entry is already stored
7194 IST_Num := Interrupt_States.First;
7196 -- If entry not found, add it
7198 if IST_Num > Interrupt_States.Last then
7199 Interrupt_States.Append
7200 ((Interrupt_Number => UI_To_Int (Int_Val),
7201 Interrupt_State => State_Type,
7202 Pragma_Loc => Loc));
7205 -- Case of entry for the same entry
7207 elsif Int_Val = Interrupt_States.Table (IST_Num).
7210 -- If state matches, done, no need to make redundant entry
7213 State_Type = Interrupt_States.Table (IST_Num).
7216 -- Otherwise if state does not match, error
7219 Interrupt_States.Table (IST_Num).Pragma_Loc;
7221 ("state conflicts with that given at #", Arg2);
7225 IST_Num := IST_Num + 1;
7227 end Interrupt_State;
7229 ----------------------
7230 -- Java_Constructor --
7231 ----------------------
7233 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
7235 when Pragma_Java_Constructor => Java_Constructor : declare
7242 Check_Arg_Count (1);
7243 Check_Optional_Identifier (Arg1, Name_Entity);
7244 Check_Arg_Is_Local_Name (Arg1);
7246 Id := Expression (Arg1);
7247 Find_Program_Unit_Name (Id);
7249 -- If we did not find the name, we are done
7251 if Etype (Id) = Any_Type then
7255 Hom_Id := Entity (Id);
7257 -- Loop through homonyms
7260 Def_Id := Get_Base_Subprogram (Hom_Id);
7262 -- The constructor is required to be a function returning
7263 -- an access type whose designated type has convention Java.
7265 if Ekind (Def_Id) = E_Function
7266 and then Ekind (Etype (Def_Id)) in Access_Kind
7269 (Designated_Type (Etype (Def_Id))) = Convention_Java
7272 (Root_Type (Designated_Type (Etype (Def_Id))))
7275 Set_Is_Constructor (Def_Id);
7276 Set_Convention (Def_Id, Convention_Java);
7280 ("pragma% requires function returning a 'Java access type",
7284 Hom_Id := Homonym (Hom_Id);
7286 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
7288 end Java_Constructor;
7290 ----------------------
7291 -- Java_Interface --
7292 ----------------------
7294 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
7296 when Pragma_Java_Interface => Java_Interface : declare
7302 Check_Arg_Count (1);
7303 Check_Optional_Identifier (Arg1, Name_Entity);
7304 Check_Arg_Is_Local_Name (Arg1);
7306 Arg := Expression (Arg1);
7309 if Etype (Arg) = Any_Type then
7313 if not Is_Entity_Name (Arg)
7314 or else not Is_Type (Entity (Arg))
7316 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
7319 Typ := Underlying_Type (Entity (Arg));
7321 -- For now we simply check some of the semantic constraints
7322 -- on the type. This currently leaves out some restrictions
7323 -- on interface types, namely that the parent type must be
7324 -- java.lang.Object.Typ and that all primitives of the type
7325 -- should be declared abstract. ???
7327 if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
7328 Error_Pragma_Arg ("pragma% requires an abstract "
7329 & "tagged type", Arg1);
7331 elsif not Has_Discriminants (Typ)
7332 or else Ekind (Etype (First_Discriminant (Typ)))
7333 /= E_Anonymous_Access_Type
7335 not Is_Class_Wide_Type
7336 (Designated_Type (Etype (First_Discriminant (Typ))))
7339 ("type must have a class-wide access discriminant", Arg1);
7347 -- pragma Keep_Names ([On => ] local_NAME);
7349 when Pragma_Keep_Names => Keep_Names : declare
7354 Check_Arg_Count (1);
7355 Check_Optional_Identifier (Arg1, Name_On);
7356 Check_Arg_Is_Local_Name (Arg1);
7358 Arg := Expression (Arg1);
7361 if Etype (Arg) = Any_Type then
7365 if not Is_Entity_Name (Arg)
7366 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
7369 ("pragma% requires a local enumeration type", Arg1);
7372 Set_Discard_Names (Entity (Arg), False);
7379 -- pragma License (RESTRICTED | UNRESRICTED | GPL | MODIFIED_GPL);
7381 when Pragma_License =>
7383 Check_Arg_Count (1);
7384 Check_No_Identifiers;
7385 Check_Valid_Configuration_Pragma;
7386 Check_Arg_Is_Identifier (Arg1);
7389 Sind : constant Source_File_Index :=
7390 Source_Index (Current_Sem_Unit);
7393 case Chars (Get_Pragma_Arg (Arg1)) is
7395 Set_License (Sind, GPL);
7397 when Name_Modified_GPL =>
7398 Set_License (Sind, Modified_GPL);
7400 when Name_Restricted =>
7401 Set_License (Sind, Restricted);
7403 when Name_Unrestricted =>
7404 Set_License (Sind, Unrestricted);
7407 Error_Pragma_Arg ("invalid license name", Arg1);
7415 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
7417 when Pragma_Link_With => Link_With : declare
7423 if Operating_Mode = Generate_Code
7424 and then In_Extended_Main_Source_Unit (N)
7426 Check_At_Least_N_Arguments (1);
7427 Check_No_Identifiers;
7428 Check_Is_In_Decl_Part_Or_Package_Spec;
7429 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7433 while Present (Arg) loop
7434 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7436 -- Store argument, converting sequences of spaces
7437 -- to a single null character (this is one of the
7438 -- differences in processing between Link_With
7439 -- and Linker_Options).
7442 C : constant Char_Code := Get_Char_Code (' ');
7443 S : constant String_Id :=
7444 Strval (Expr_Value_S (Expression (Arg)));
7445 L : constant Nat := String_Length (S);
7448 procedure Skip_Spaces;
7449 -- Advance F past any spaces
7451 procedure Skip_Spaces is
7453 while F <= L and then Get_String_Char (S, F) = C loop
7459 Skip_Spaces; -- skip leading spaces
7461 -- Loop through characters, changing any embedded
7462 -- sequence of spaces to a single null character
7463 -- (this is how Link_With/Linker_Options differ)
7466 if Get_String_Char (S, F) = C then
7469 Store_String_Char (ASCII.NUL);
7472 Store_String_Char (Get_String_Char (S, F));
7480 if Present (Arg) then
7481 Store_String_Char (ASCII.NUL);
7485 Store_Linker_Option_String (End_String);
7493 -- pragma Linker_Alias (
7494 -- [Entity =>] LOCAL_NAME
7495 -- [Alias =>] static_string_EXPRESSION);
7497 when Pragma_Linker_Alias =>
7499 Check_Arg_Count (2);
7500 Check_Optional_Identifier (Arg1, Name_Entity);
7501 Check_Optional_Identifier (Arg2, "alias");
7502 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7503 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7505 -- The only processing required is to link this item on to the
7506 -- list of rep items for the given entity. This is accomplished
7507 -- by the call to Rep_Item_Too_Late (when no error is detected
7508 -- and False is returned).
7510 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7513 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7516 --------------------
7517 -- Linker_Options --
7518 --------------------
7520 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
7522 when Pragma_Linker_Options => Linker_Options : declare
7526 Check_Ada_83_Warning;
7527 Check_No_Identifiers;
7528 Check_Arg_Count (1);
7529 Check_Is_In_Decl_Part_Or_Package_Spec;
7531 if Operating_Mode = Generate_Code
7532 and then In_Extended_Main_Source_Unit (N)
7534 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7535 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
7538 while Present (Arg) loop
7539 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7540 Store_String_Char (ASCII.NUL);
7542 (Strval (Expr_Value_S (Expression (Arg))));
7546 Store_Linker_Option_String (End_String);
7550 --------------------
7551 -- Linker_Section --
7552 --------------------
7554 -- pragma Linker_Section (
7555 -- [Entity =>] LOCAL_NAME
7556 -- [Section =>] static_string_EXPRESSION);
7558 when Pragma_Linker_Section =>
7560 Check_Arg_Count (2);
7561 Check_Optional_Identifier (Arg1, Name_Entity);
7562 Check_Optional_Identifier (Arg2, Name_Section);
7563 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7564 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7566 -- The only processing required is to link this item on to the
7567 -- list of rep items for the given entity. This is accomplished
7568 -- by the call to Rep_Item_Too_Late (when no error is detected
7569 -- and False is returned).
7571 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7574 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7581 -- pragma List (On | Off)
7583 -- There is nothing to do here, since we did all the processing
7584 -- for this pragma in Par.Prag (so that it works properly even in
7585 -- syntax only mode)
7590 --------------------
7591 -- Locking_Policy --
7592 --------------------
7594 -- pragma Locking_Policy (policy_IDENTIFIER);
7596 when Pragma_Locking_Policy => declare
7600 Check_Ada_83_Warning;
7601 Check_Arg_Count (1);
7602 Check_No_Identifiers;
7603 Check_Arg_Is_Locking_Policy (Arg1);
7604 Check_Valid_Configuration_Pragma;
7605 Get_Name_String (Chars (Expression (Arg1)));
7606 LP := Fold_Upper (Name_Buffer (1));
7608 if Locking_Policy /= ' '
7609 and then Locking_Policy /= LP
7611 Error_Msg_Sloc := Locking_Policy_Sloc;
7612 Error_Pragma ("locking policy incompatible with policy#");
7614 -- Set new policy, but always preserve System_Location since
7615 -- we like the error message with the run time name.
7618 Locking_Policy := LP;
7620 if Locking_Policy_Sloc /= System_Location then
7621 Locking_Policy_Sloc := Loc;
7630 -- pragma Long_Float (D_Float | G_Float);
7632 when Pragma_Long_Float =>
7634 Check_Valid_Configuration_Pragma;
7635 Check_Arg_Count (1);
7636 Check_No_Identifier (Arg1);
7637 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
7639 if not OpenVMS_On_Target then
7640 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
7645 if Chars (Expression (Arg1)) = Name_D_Float then
7646 if Opt.Float_Format_Long = 'G' then
7647 Error_Pragma ("G_Float previously specified");
7650 Opt.Float_Format_Long := 'D';
7652 -- G_Float case (this is the default, does not need overriding)
7655 if Opt.Float_Format_Long = 'D' then
7656 Error_Pragma ("D_Float previously specified");
7659 Opt.Float_Format_Long := 'G';
7662 Set_Standard_Fpt_Formats;
7664 -----------------------
7665 -- Machine_Attribute --
7666 -----------------------
7668 -- pragma Machine_Attribute (
7669 -- [Entity =>] LOCAL_NAME,
7670 -- [Attribute_Name =>] static_string_EXPRESSION
7671 -- [,[Info =>] static_string_EXPRESSION] );
7673 when Pragma_Machine_Attribute => Machine_Attribute : declare
7679 if Arg_Count = 3 then
7680 Check_Optional_Identifier (Arg3, "info");
7681 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
7683 Check_Arg_Count (2);
7686 Check_Arg_Is_Local_Name (Arg1);
7687 Check_Optional_Identifier (Arg2, "attribute_name");
7688 Check_Optional_Identifier (Arg1, Name_Entity);
7689 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7690 Def_Id := Entity (Expression (Arg1));
7692 if Is_Access_Type (Def_Id) then
7693 Def_Id := Designated_Type (Def_Id);
7696 if Rep_Item_Too_Early (Def_Id, N) then
7700 Def_Id := Underlying_Type (Def_Id);
7702 -- The only processing required is to link this item on to the
7703 -- list of rep items for the given entity. This is accomplished
7704 -- by the call to Rep_Item_Too_Late (when no error is detected
7705 -- and False is returned).
7707 if Rep_Item_Too_Late (Def_Id, N) then
7710 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7712 end Machine_Attribute;
7718 -- pragma Main_Storage
7719 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7721 -- MAIN_STORAGE_OPTION ::=
7722 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7723 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7725 when Pragma_Main => Main : declare
7726 Args : Args_List (1 .. 3);
7727 Names : constant Name_List (1 .. 3) := (
7729 Name_Task_Stack_Size_Default,
7730 Name_Time_Slicing_Enabled);
7736 Gather_Associations (Names, Args);
7738 for J in 1 .. 2 loop
7739 if Present (Args (J)) then
7740 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7744 if Present (Args (3)) then
7745 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
7749 while Present (Nod) loop
7750 if Nkind (Nod) = N_Pragma
7751 and then Chars (Nod) = Name_Main
7753 Error_Msg_Name_1 := Chars (N);
7754 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7765 -- pragma Main_Storage
7766 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
7768 -- MAIN_STORAGE_OPTION ::=
7769 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
7770 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
7772 when Pragma_Main_Storage => Main_Storage : declare
7773 Args : Args_List (1 .. 2);
7774 Names : constant Name_List (1 .. 2) := (
7775 Name_Working_Storage,
7782 Gather_Associations (Names, Args);
7784 for J in 1 .. 2 loop
7785 if Present (Args (J)) then
7786 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
7790 Check_In_Main_Program;
7793 while Present (Nod) loop
7794 if Nkind (Nod) = N_Pragma
7795 and then Chars (Nod) = Name_Main_Storage
7797 Error_Msg_Name_1 := Chars (N);
7798 Error_Msg_N ("duplicate pragma% not permitted", Nod);
7809 -- pragma Memory_Size (NUMERIC_LITERAL)
7811 when Pragma_Memory_Size =>
7814 -- Memory size is simply ignored
7816 Check_No_Identifiers;
7817 Check_Arg_Count (1);
7818 Check_Arg_Is_Integer_Literal (Arg1);
7824 -- pragma No_Return (procedure_LOCAL_NAME);
7826 when Pragma_No_Return => No_Return : declare
7833 Check_Arg_Count (1);
7834 Check_No_Identifiers;
7835 Check_Arg_Is_Local_Name (Arg1);
7836 Id := Expression (Arg1);
7839 if not Is_Entity_Name (Id) then
7840 Error_Pragma_Arg ("entity name required", Arg1);
7843 if Etype (Id) = Any_Type then
7851 and then Scope (E) = Current_Scope
7853 if Ekind (E) = E_Procedure
7854 or else Ekind (E) = E_Generic_Procedure
7864 Error_Pragma ("no procedures found for pragma%");
7868 ------------------------
7869 -- No_Strict_Aliasing --
7870 ------------------------
7872 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
7877 Check_At_Most_N_Arguments (1);
7879 if Arg_Count = 0 then
7880 Check_Valid_Configuration_Pragma;
7881 Opt.No_Strict_Aliasing := True;
7884 Check_Optional_Identifier (Arg2, Name_Entity);
7885 Check_Arg_Is_Local_Name (Arg1);
7886 E_Id := Entity (Expression (Arg1));
7888 if E_Id = Any_Type then
7890 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
7891 Error_Pragma_Arg ("pragma% requires access type", Arg1);
7894 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
7896 end No_Strict_Alias;
7902 -- pragma Obsolescent [(static_string_EXPRESSION)];
7904 when Pragma_Obsolescent => Obsolescent : declare
7907 Check_At_Most_N_Arguments (1);
7908 Check_No_Identifiers;
7910 if Arg_Count = 1 then
7911 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7915 or else (Nkind (Prev (N))) /= N_Subprogram_Declaration
7918 ("pragma% misplaced, must immediately " &
7919 "follow subprogram spec");
7927 -- pragma No_Run_Time
7929 -- Note: this pragma is retained for backwards compatibiltiy.
7930 -- See body of Rtsfind for full details on its handling.
7932 when Pragma_No_Run_Time =>
7934 Check_Valid_Configuration_Pragma;
7935 Check_Arg_Count (0);
7937 No_Run_Time_Mode := True;
7938 Configurable_Run_Time_Mode := True;
7941 Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
7944 Duration_32_Bits_On_Target := True;
7948 Set_Restriction (No_Finalization, N);
7949 Set_Restriction (No_Exception_Handlers, N);
7950 Set_Restriction (Max_Tasks, N, 0);
7951 Set_Restriction (No_Tasking, N);
7953 -----------------------
7954 -- Normalize_Scalars --
7955 -----------------------
7957 -- pragma Normalize_Scalars;
7959 when Pragma_Normalize_Scalars =>
7960 Check_Ada_83_Warning;
7961 Check_Arg_Count (0);
7962 Check_Valid_Configuration_Pragma;
7963 Normalize_Scalars := True;
7964 Init_Or_Norm_Scalars := True;
7970 -- pragma Optimize (Time | Space);
7972 -- The actual check for optimize is done in Gigi. Note that this
7973 -- pragma does not actually change the optimization setting, it
7974 -- simply checks that it is consistent with the pragma.
7976 when Pragma_Optimize =>
7977 Check_No_Identifiers;
7978 Check_Arg_Count (1);
7979 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
7981 -------------------------
7982 -- Optional_Overriding --
7983 -------------------------
7985 -- These pragmas are treated as part of the previous subprogram
7986 -- declaration, and analyzed immediately after it (see sem_ch6,
7987 -- Check_Overriding_Operation). If the pragma has not been analyzed
7988 -- yet, it appears in the wrong place.
7990 when Pragma_Optional_Overriding =>
7991 Error_Msg_N ("pragma must appear immediately after subprogram", N);
7997 when Pragma_Overriding =>
7998 Error_Msg_N ("pragma must appear immediately after subprogram", N);
8004 -- pragma Pack (first_subtype_LOCAL_NAME);
8006 when Pragma_Pack => Pack : declare
8007 Assoc : constant Node_Id := Arg1;
8012 Check_No_Identifiers;
8013 Check_Arg_Count (1);
8014 Check_Arg_Is_Local_Name (Arg1);
8016 Type_Id := Expression (Assoc);
8017 Find_Type (Type_Id);
8018 Typ := Entity (Type_Id);
8021 or else Rep_Item_Too_Early (Typ, N)
8025 Typ := Underlying_Type (Typ);
8028 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
8029 Error_Pragma ("pragma% must specify array or record type");
8032 Check_First_Subtype (Arg1);
8034 if Has_Pragma_Pack (Typ) then
8035 Error_Pragma ("duplicate pragma%, only one allowed");
8037 -- Array type. We set the Has_Pragma_Pack flag, and Is_Packed,
8038 -- but not Has_Non_Standard_Rep, because we don't actually know
8039 -- till freeze time if the array can have packed representation.
8040 -- That's because in the general case we do not know enough about
8041 -- the component type until it in turn is frozen, which certainly
8042 -- happens before the array type is frozen, but not necessarily
8043 -- till that point (i.e. right now it may be unfrozen).
8045 elsif Is_Array_Type (Typ) then
8046 if Has_Aliased_Components (Base_Type (Typ)) then
8048 ("pragma% ignored, cannot pack aliased components?");
8050 elsif Has_Atomic_Components (Typ)
8051 or else Is_Atomic (Component_Type (Typ))
8054 ("?pragma% ignored, cannot pack atomic components");
8056 elsif not Rep_Item_Too_Late (Typ, N) then
8057 Set_Is_Packed (Base_Type (Typ));
8058 Set_Has_Pragma_Pack (Base_Type (Typ));
8059 Set_Has_Non_Standard_Rep (Base_Type (Typ));
8062 -- Record type. For record types, the pack is always effective
8064 else pragma Assert (Is_Record_Type (Typ));
8065 if not Rep_Item_Too_Late (Typ, N) then
8066 Set_Has_Pragma_Pack (Base_Type (Typ));
8067 Set_Is_Packed (Base_Type (Typ));
8068 Set_Has_Non_Standard_Rep (Base_Type (Typ));
8079 -- There is nothing to do here, since we did all the processing
8080 -- for this pragma in Par.Prag (so that it works properly even in
8081 -- syntax only mode)
8090 -- pragma Passive [(PASSIVE_FORM)];
8092 -- PASSIVE_FORM ::= Semaphore | No
8094 when Pragma_Passive =>
8097 if Nkind (Parent (N)) /= N_Task_Definition then
8098 Error_Pragma ("pragma% must be within task definition");
8101 if Arg_Count /= 0 then
8102 Check_Arg_Count (1);
8103 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
8110 -- pragma Polling (ON | OFF);
8112 when Pragma_Polling =>
8114 Check_Arg_Count (1);
8115 Check_No_Identifiers;
8116 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
8117 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
8119 ---------------------
8120 -- Persistent_Data --
8121 ---------------------
8123 when Pragma_Persistent_Data => declare
8127 -- Register the pragma as applying to the compilation unit.
8128 -- Individual Persistent_Object pragmas for relevant objects
8129 -- are generated the end of the compilation.
8132 Check_Valid_Configuration_Pragma;
8133 Check_Arg_Count (0);
8134 Ent := Find_Lib_Unit_Name;
8135 Set_Is_Preelaborated (Ent);
8138 -----------------------
8139 -- Persistent_Object --
8140 -----------------------
8142 when Pragma_Persistent_Object => declare
8150 Check_Arg_Count (1);
8151 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8153 if not Is_Entity_Name (Expression (Arg1))
8155 (Ekind (Entity (Expression (Arg1))) /= E_Variable
8156 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
8158 Error_Pragma_Arg ("pragma only applies to objects", Arg1);
8161 Ent := Entity (Expression (Arg1));
8162 Decl := Parent (Ent);
8164 if Nkind (Decl) /= N_Object_Declaration then
8168 -- Placement of the object depends on whether there is
8169 -- an initial value or none. If the No_Initialization flag
8170 -- is set, the initialization has been transformed into
8171 -- assignments, which is disallowed elaboration code.
8173 if No_Initialization (Decl) then
8175 ("initialization for persistent object"
8176 & "must be static expression", Decl);
8180 if No (Expression (Decl)) then
8182 Store_String_Chars ("section ("".persistent.bss"")");
8186 if not Is_OK_Static_Expression (Expression (Decl)) then
8187 Flag_Non_Static_Expr
8188 ("initialization for persistent object"
8189 & "must be static expression!", Expression (Decl));
8194 Store_String_Chars ("section ("".persistent.data"")");
8201 Name_Machine_Attribute,
8203 (Make_Pragma_Argument_Association
8204 (Sloc => Sloc (Arg1),
8205 Expression => New_Occurrence_Of (Ent, Sloc (Ent))),
8206 Make_Pragma_Argument_Association
8207 (Sloc => Sloc (Arg1),
8210 (Sloc => Sloc (Arg1),
8213 Insert_After (N, MA);
8215 Set_Has_Gigi_Rep_Item (Ent);
8222 -- pragma Preelaborate [(library_unit_NAME)];
8224 -- Set the flag Is_Preelaborated of program unit name entity
8226 when Pragma_Preelaborate => Preelaborate : declare
8227 Pa : constant Node_Id := Parent (N);
8228 Pk : constant Node_Kind := Nkind (Pa);
8232 Check_Ada_83_Warning;
8233 Check_Valid_Library_Unit_Pragma;
8235 if Nkind (N) = N_Null_Statement then
8239 Ent := Find_Lib_Unit_Name;
8241 -- This filters out pragmas inside generic parent then
8242 -- show up inside instantiation
8245 and then not (Pk = N_Package_Specification
8246 and then Present (Generic_Parent (Pa)))
8248 if not Debug_Flag_U then
8249 Set_Is_Preelaborated (Ent);
8250 Set_Suppress_Elaboration_Warnings (Ent);
8259 -- pragma Priority (EXPRESSION);
8261 when Pragma_Priority => Priority : declare
8262 P : constant Node_Id := Parent (N);
8266 Check_No_Identifiers;
8267 Check_Arg_Count (1);
8271 if Nkind (P) = N_Subprogram_Body then
8272 Check_In_Main_Program;
8274 Arg := Expression (Arg1);
8275 Analyze_And_Resolve (Arg, Standard_Integer);
8279 if not Is_Static_Expression (Arg) then
8280 Flag_Non_Static_Expr
8281 ("main subprogram priority is not static!", Arg);
8284 -- If constraint error, then we already signalled an error
8286 elsif Raises_Constraint_Error (Arg) then
8289 -- Otherwise check in range
8293 Val : constant Uint := Expr_Value (Arg);
8297 or else Val > Expr_Value (Expression
8298 (Parent (RTE (RE_Max_Priority))))
8301 ("main subprogram priority is out of range", Arg1);
8307 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
8309 -- Task or Protected, must be of type Integer
8311 elsif Nkind (P) = N_Protected_Definition
8313 Nkind (P) = N_Task_Definition
8315 Arg := Expression (Arg1);
8317 -- The expression must be analyzed in the special manner
8318 -- described in "Handling of Default and Per-Object
8319 -- Expressions" in sem.ads.
8321 Analyze_Per_Use_Expression (Arg, Standard_Integer);
8323 if not Is_Static_Expression (Arg) then
8324 Check_Restriction (Static_Priorities, Arg);
8327 -- Anything else is incorrect
8333 if Has_Priority_Pragma (P) then
8334 Error_Pragma ("duplicate pragma% not allowed");
8336 Set_Has_Priority_Pragma (P, True);
8338 if Nkind (P) = N_Protected_Definition
8340 Nkind (P) = N_Task_Definition
8342 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8343 -- exp_ch9 should use this ???
8352 -- pragma Profile (profile_IDENTIFIER);
8354 -- profile_IDENTIFIER => Protected | Ravenscar
8356 when Pragma_Profile =>
8357 Check_Arg_Count (1);
8358 Check_Valid_Configuration_Pragma;
8359 Check_No_Identifiers;
8362 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
8364 if Chars (Argx) = Name_Ravenscar then
8365 Set_Ravenscar_Profile (N);
8367 elsif Chars (Argx) = Name_Restricted then
8368 Set_Profile_Restrictions (Restricted, N, Warn => False);
8370 Error_Pragma_Arg ("& is not a valid profile", Argx);
8374 ----------------------
8375 -- Profile_Warnings --
8376 ----------------------
8378 -- pragma Profile_Warnings (profile_IDENTIFIER);
8380 -- profile_IDENTIFIER => Protected | Ravenscar
8382 when Pragma_Profile_Warnings =>
8384 Check_Arg_Count (1);
8385 Check_Valid_Configuration_Pragma;
8386 Check_No_Identifiers;
8389 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
8391 if Chars (Argx) = Name_Ravenscar then
8392 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
8394 elsif Chars (Argx) = Name_Restricted then
8395 Set_Profile_Restrictions (Restricted, N, Warn => True);
8397 Error_Pragma_Arg ("& is not a valid profile", Argx);
8401 --------------------------
8402 -- Propagate_Exceptions --
8403 --------------------------
8405 -- pragma Propagate_Exceptions;
8407 when Pragma_Propagate_Exceptions =>
8409 Check_Arg_Count (0);
8411 if In_Extended_Main_Source_Unit (N) then
8412 Propagate_Exceptions := True;
8419 -- pragma Psect_Object (
8420 -- [Internal =>] LOCAL_NAME,
8421 -- [, [External =>] EXTERNAL_SYMBOL]
8422 -- [, [Size =>] EXTERNAL_SYMBOL]);
8424 when Pragma_Psect_Object | Pragma_Common_Object =>
8425 Psect_Object : declare
8426 Args : Args_List (1 .. 3);
8427 Names : constant Name_List (1 .. 3) := (
8432 Internal : Node_Id renames Args (1);
8433 External : Node_Id renames Args (2);
8434 Size : Node_Id renames Args (3);
8438 procedure Check_Too_Long (Arg : Node_Id);
8439 -- Posts message if the argument is an identifier with more
8440 -- than 31 characters, or a string literal with more than
8441 -- 31 characters, and we are operating under VMS
8443 --------------------
8444 -- Check_Too_Long --
8445 --------------------
8447 procedure Check_Too_Long (Arg : Node_Id) is
8448 X : constant Node_Id := Original_Node (Arg);
8451 if Nkind (X) /= N_String_Literal
8453 Nkind (X) /= N_Identifier
8456 ("inappropriate argument for pragma %", Arg);
8459 if OpenVMS_On_Target then
8460 if (Nkind (X) = N_String_Literal
8461 and then String_Length (Strval (X)) > 31)
8463 (Nkind (X) = N_Identifier
8464 and then Length_Of_Name (Chars (X)) > 31)
8467 ("argument for pragma % is longer than 31 characters",
8473 -- Start of processing for Common_Object/Psect_Object
8477 Gather_Associations (Names, Args);
8478 Process_Extended_Import_Export_Internal_Arg (Internal);
8480 Def_Id := Entity (Internal);
8482 if Ekind (Def_Id) /= E_Constant
8483 and then Ekind (Def_Id) /= E_Variable
8486 ("pragma% must designate an object", Internal);
8489 Check_Too_Long (Internal);
8491 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
8493 ("cannot use pragma% for imported/exported object",
8497 if Is_Concurrent_Type (Etype (Internal)) then
8499 ("cannot specify pragma % for task/protected object",
8503 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
8505 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
8507 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
8510 if Ekind (Def_Id) = E_Constant then
8512 ("cannot specify pragma % for a constant", Internal);
8515 if Is_Record_Type (Etype (Internal)) then
8521 Ent := First_Entity (Etype (Internal));
8522 while Present (Ent) loop
8523 Decl := Declaration_Node (Ent);
8525 if Ekind (Ent) = E_Component
8526 and then Nkind (Decl) = N_Component_Declaration
8527 and then Present (Expression (Decl))
8528 and then Warn_On_Export_Import
8531 ("?object for pragma % has defaults", Internal);
8541 if Present (Size) then
8542 Check_Too_Long (Size);
8545 if Present (External) then
8546 Check_Too_Long (External);
8549 -- If all error tests pass, link pragma on to the rep item chain
8551 Record_Rep_Item (Def_Id, N);
8558 -- pragma Pure [(library_unit_NAME)];
8560 when Pragma_Pure => Pure : declare
8563 Check_Ada_83_Warning;
8564 Check_Valid_Library_Unit_Pragma;
8566 if Nkind (N) = N_Null_Statement then
8570 Ent := Find_Lib_Unit_Name;
8572 Set_Suppress_Elaboration_Warnings (Ent);
8579 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
8581 when Pragma_Pure_Function => Pure_Function : declare
8585 Effective : Boolean := False;
8589 Check_Arg_Count (1);
8590 Check_Optional_Identifier (Arg1, Name_Entity);
8591 Check_Arg_Is_Local_Name (Arg1);
8592 E_Id := Expression (Arg1);
8594 if Error_Posted (E_Id) then
8598 -- Loop through homonyms (overloadings) of referenced entity
8604 Def_Id := Get_Base_Subprogram (E);
8606 if Ekind (Def_Id) /= E_Function
8607 and then Ekind (Def_Id) /= E_Generic_Function
8608 and then Ekind (Def_Id) /= E_Operator
8611 ("pragma% requires a function name", Arg1);
8614 Set_Is_Pure (Def_Id);
8616 if not Has_Pragma_Pure_Function (Def_Id) then
8617 Set_Has_Pragma_Pure_Function (Def_Id);
8622 exit when No (E) or else Scope (E) /= Current_Scope;
8626 and then Warn_On_Redundant_Constructs
8628 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
8634 --------------------
8635 -- Queuing_Policy --
8636 --------------------
8638 -- pragma Queuing_Policy (policy_IDENTIFIER);
8640 when Pragma_Queuing_Policy => declare
8644 Check_Ada_83_Warning;
8645 Check_Arg_Count (1);
8646 Check_No_Identifiers;
8647 Check_Arg_Is_Queuing_Policy (Arg1);
8648 Check_Valid_Configuration_Pragma;
8649 Get_Name_String (Chars (Expression (Arg1)));
8650 QP := Fold_Upper (Name_Buffer (1));
8652 if Queuing_Policy /= ' '
8653 and then Queuing_Policy /= QP
8655 Error_Msg_Sloc := Queuing_Policy_Sloc;
8656 Error_Pragma ("queuing policy incompatible with policy#");
8658 -- Set new policy, but always preserve System_Location since
8659 -- we like the error message with the run time name.
8662 Queuing_Policy := QP;
8664 if Queuing_Policy_Sloc /= System_Location then
8665 Queuing_Policy_Sloc := Loc;
8670 ---------------------------
8671 -- Remote_Call_Interface --
8672 ---------------------------
8674 -- pragma Remote_Call_Interface [(library_unit_NAME)];
8676 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
8677 Cunit_Node : Node_Id;
8678 Cunit_Ent : Entity_Id;
8682 Check_Ada_83_Warning;
8683 Check_Valid_Library_Unit_Pragma;
8685 if Nkind (N) = N_Null_Statement then
8689 Cunit_Node := Cunit (Current_Sem_Unit);
8690 K := Nkind (Unit (Cunit_Node));
8691 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8693 if K = N_Package_Declaration
8694 or else K = N_Generic_Package_Declaration
8695 or else K = N_Subprogram_Declaration
8696 or else K = N_Generic_Subprogram_Declaration
8697 or else (K = N_Subprogram_Body
8698 and then Acts_As_Spec (Unit (Cunit_Node)))
8703 "pragma% must apply to package or subprogram declaration");
8706 Set_Is_Remote_Call_Interface (Cunit_Ent);
8707 end Remote_Call_Interface;
8713 -- pragma Remote_Types [(library_unit_NAME)];
8715 when Pragma_Remote_Types => Remote_Types : declare
8716 Cunit_Node : Node_Id;
8717 Cunit_Ent : Entity_Id;
8720 Check_Ada_83_Warning;
8721 Check_Valid_Library_Unit_Pragma;
8723 if Nkind (N) = N_Null_Statement then
8727 Cunit_Node := Cunit (Current_Sem_Unit);
8728 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8730 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8732 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8735 "pragma% can only apply to a package declaration");
8738 Set_Is_Remote_Types (Cunit_Ent);
8745 -- pragma Ravenscar;
8747 when Pragma_Ravenscar =>
8749 Check_Arg_Count (0);
8750 Check_Valid_Configuration_Pragma;
8751 Set_Ravenscar_Profile (N);
8753 if Warn_On_Obsolescent_Feature then
8755 ("pragma Ravenscar is an obsolescent feature?", N);
8757 ("|use pragma Profile (Ravenscar) instead", N);
8760 -------------------------
8761 -- Restricted_Run_Time --
8762 -------------------------
8764 -- pragma Restricted_Run_Time;
8766 when Pragma_Restricted_Run_Time =>
8768 Check_Arg_Count (0);
8769 Check_Valid_Configuration_Pragma;
8770 Set_Profile_Restrictions (Restricted, N, Warn => False);
8772 if Warn_On_Obsolescent_Feature then
8774 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
8776 ("|use pragma Profile (Restricted) instead", N);
8783 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
8786 -- restriction_IDENTIFIER
8787 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8789 when Pragma_Restrictions =>
8790 Process_Restrictions_Or_Restriction_Warnings;
8792 --------------------------
8793 -- Restriction_Warnings --
8794 --------------------------
8796 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
8799 -- restriction_IDENTIFIER
8800 -- | restriction_parameter_IDENTIFIER => EXPRESSION
8802 when Pragma_Restriction_Warnings =>
8803 Process_Restrictions_Or_Restriction_Warnings;
8809 -- pragma Reviewable;
8811 when Pragma_Reviewable =>
8812 Check_Ada_83_Warning;
8813 Check_Arg_Count (0);
8819 -- pragma Share_Generic (NAME {, NAME});
8821 when Pragma_Share_Generic =>
8823 Process_Generic_List;
8829 -- pragma Shared (LOCAL_NAME);
8831 when Pragma_Shared =>
8833 Process_Atomic_Shared_Volatile;
8835 --------------------
8836 -- Shared_Passive --
8837 --------------------
8839 -- pragma Shared_Passive [(library_unit_NAME)];
8841 -- Set the flag Is_Shared_Passive of program unit name entity
8843 when Pragma_Shared_Passive => Shared_Passive : declare
8844 Cunit_Node : Node_Id;
8845 Cunit_Ent : Entity_Id;
8848 Check_Ada_83_Warning;
8849 Check_Valid_Library_Unit_Pragma;
8851 if Nkind (N) = N_Null_Statement then
8855 Cunit_Node := Cunit (Current_Sem_Unit);
8856 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
8858 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
8860 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
8863 "pragma% can only apply to a package declaration");
8866 Set_Is_Shared_Passive (Cunit_Ent);
8869 ----------------------
8870 -- Source_File_Name --
8871 ----------------------
8873 -- There are five forms for this pragma:
8875 -- pragma Source_File_Name (
8876 -- [UNIT_NAME =>] unit_NAME,
8877 -- BODY_FILE_NAME => STRING_LITERAL
8878 -- [, [INDEX =>] INTEGER_LITERAL]);
8880 -- pragma Source_File_Name (
8881 -- [UNIT_NAME =>] unit_NAME,
8882 -- SPEC_FILE_NAME => STRING_LITERAL
8883 -- [, [INDEX =>] INTEGER_LITERAL]);
8885 -- pragma Source_File_Name (
8886 -- BODY_FILE_NAME => STRING_LITERAL
8887 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8888 -- [, CASING => CASING_SPEC]);
8890 -- pragma Source_File_Name (
8891 -- SPEC_FILE_NAME => STRING_LITERAL
8892 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8893 -- [, CASING => CASING_SPEC]);
8895 -- pragma Source_File_Name (
8896 -- SUBUNIT_FILE_NAME => STRING_LITERAL
8897 -- [, DOT_REPLACEMENT => STRING_LITERAL]
8898 -- [, CASING => CASING_SPEC]);
8900 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
8902 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
8903 -- Source_File_Name (SFN), however their usage is exclusive:
8904 -- SFN can only be used when no project file is used, while
8905 -- SFNP can only be used when a project file is used.
8907 -- No processing here. Processing was completed during parsing,
8908 -- since we need to have file names set as early as possible.
8909 -- Units are loaded well before semantic processing starts.
8911 -- The only processing we defer to this point is the check
8912 -- for correct placement.
8914 when Pragma_Source_File_Name =>
8916 Check_Valid_Configuration_Pragma;
8918 ------------------------------
8919 -- Source_File_Name_Project --
8920 ------------------------------
8922 -- See Source_File_Name for syntax
8924 -- No processing here. Processing was completed during parsing,
8925 -- since we need to have file names set as early as possible.
8926 -- Units are loaded well before semantic processing starts.
8928 -- The only processing we defer to this point is the check
8929 -- for correct placement.
8931 when Pragma_Source_File_Name_Project =>
8933 Check_Valid_Configuration_Pragma;
8935 -- Check that a pragma Source_File_Name_Project is used only
8936 -- in a configuration pragmas file.
8938 -- Pragmas Source_File_Name_Project should only be generated
8939 -- by the Project Manager in configuration pragmas files.
8941 -- This is really an ugly test. It seems to depend on some
8942 -- accidental and undocumented property. At the very least
8943 -- it needs to be documented, but it would be better to have
8944 -- a clean way of testing if we are in a configuration file???
8946 if Present (Parent (N)) then
8948 ("pragma% can only appear in a configuration pragmas file");
8951 ----------------------
8952 -- Source_Reference --
8953 ----------------------
8955 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
8957 -- Nothing to do, all processing completed in Par.Prag, since we
8958 -- need the information for possible parser messages that are output
8960 when Pragma_Source_Reference =>
8967 -- pragma Storage_Size (EXPRESSION);
8969 when Pragma_Storage_Size => Storage_Size : declare
8970 P : constant Node_Id := Parent (N);
8974 Check_No_Identifiers;
8975 Check_Arg_Count (1);
8977 -- The expression must be analyzed in the special manner
8978 -- described in "Handling of Default Expressions" in sem.ads.
8980 -- Set In_Default_Expression for per-object case ???
8982 Arg := Expression (Arg1);
8983 Analyze_Per_Use_Expression (Arg, Any_Integer);
8985 if not Is_Static_Expression (Arg) then
8986 Check_Restriction (Static_Storage_Size, Arg);
8989 if Nkind (P) /= N_Task_Definition then
8994 if Has_Storage_Size_Pragma (P) then
8995 Error_Pragma ("duplicate pragma% not allowed");
8997 Set_Has_Storage_Size_Pragma (P, True);
9000 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9001 -- ??? exp_ch9 should use this!
9009 -- pragma Storage_Unit (NUMERIC_LITERAL);
9011 -- Only permitted argument is System'Storage_Unit value
9013 when Pragma_Storage_Unit =>
9014 Check_No_Identifiers;
9015 Check_Arg_Count (1);
9016 Check_Arg_Is_Integer_Literal (Arg1);
9018 if Intval (Expression (Arg1)) /=
9019 UI_From_Int (Ttypes.System_Storage_Unit)
9021 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
9023 ("the only allowed argument for pragma% is ^", Arg1);
9026 --------------------
9027 -- Stream_Convert --
9028 --------------------
9030 -- pragma Stream_Convert (
9031 -- [Entity =>] type_LOCAL_NAME,
9032 -- [Read =>] function_NAME,
9033 -- [Write =>] function NAME);
9035 when Pragma_Stream_Convert => Stream_Convert : declare
9037 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
9038 -- Check that the given argument is the name of a local
9039 -- function of one argument that is not overloaded earlier
9040 -- in the current local scope. A check is also made that the
9041 -- argument is a function with one parameter.
9043 --------------------------------------
9044 -- Check_OK_Stream_Convert_Function --
9045 --------------------------------------
9047 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
9051 Check_Arg_Is_Local_Name (Arg);
9052 Ent := Entity (Expression (Arg));
9054 if Has_Homonym (Ent) then
9056 ("argument for pragma% may not be overloaded", Arg);
9059 if Ekind (Ent) /= E_Function
9060 or else No (First_Formal (Ent))
9061 or else Present (Next_Formal (First_Formal (Ent)))
9064 ("argument for pragma% must be" &
9065 " function of one argument", Arg);
9067 end Check_OK_Stream_Convert_Function;
9069 -- Start of procecessing for Stream_Convert
9073 Check_Arg_Count (3);
9074 Check_Optional_Identifier (Arg1, Name_Entity);
9075 Check_Optional_Identifier (Arg2, Name_Read);
9076 Check_Optional_Identifier (Arg3, Name_Write);
9077 Check_Arg_Is_Local_Name (Arg1);
9078 Check_OK_Stream_Convert_Function (Arg2);
9079 Check_OK_Stream_Convert_Function (Arg3);
9082 Typ : constant Entity_Id :=
9083 Underlying_Type (Entity (Expression (Arg1)));
9084 Read : constant Entity_Id := Entity (Expression (Arg2));
9085 Write : constant Entity_Id := Entity (Expression (Arg3));
9088 if Etype (Typ) = Any_Type
9090 Etype (Read) = Any_Type
9092 Etype (Write) = Any_Type
9097 Check_First_Subtype (Arg1);
9099 if Rep_Item_Too_Early (Typ, N)
9101 Rep_Item_Too_Late (Typ, N)
9106 if Underlying_Type (Etype (Read)) /= Typ then
9108 ("incorrect return type for function&", Arg2);
9111 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
9113 ("incorrect parameter type for function&", Arg3);
9116 if Underlying_Type (Etype (First_Formal (Read))) /=
9117 Underlying_Type (Etype (Write))
9120 ("result type of & does not match Read parameter type",
9126 -------------------------
9127 -- Style_Checks (GNAT) --
9128 -------------------------
9130 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
9132 -- This is processed by the parser since some of the style
9133 -- checks take place during source scanning and parsing. This
9134 -- means that we don't need to issue error messages here.
9136 when Pragma_Style_Checks => Style_Checks : declare
9137 A : constant Node_Id := Expression (Arg1);
9143 Check_No_Identifiers;
9145 -- Two argument form
9147 if Arg_Count = 2 then
9148 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9155 E_Id := Expression (Arg2);
9158 if not Is_Entity_Name (E_Id) then
9160 ("second argument of pragma% must be entity name",
9170 Set_Suppress_Style_Checks (E,
9171 (Chars (Expression (Arg1)) = Name_Off));
9172 exit when No (Homonym (E));
9178 -- One argument form
9181 Check_Arg_Count (1);
9183 if Nkind (A) = N_String_Literal then
9187 Slen : constant Natural := Natural (String_Length (S));
9188 Options : String (1 .. Slen);
9194 C := Get_String_Char (S, Int (J));
9195 exit when not In_Character_Range (C);
9196 Options (J) := Get_Character (C);
9199 Set_Style_Check_Options (Options);
9207 elsif Nkind (A) = N_Identifier then
9209 if Chars (A) = Name_All_Checks then
9210 Set_Default_Style_Check_Options;
9212 elsif Chars (A) = Name_On then
9213 Style_Check := True;
9215 elsif Chars (A) = Name_Off then
9216 Style_Check := False;
9227 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
9229 when Pragma_Subtitle =>
9231 Check_Arg_Count (1);
9232 Check_Optional_Identifier (Arg1, Name_Subtitle);
9233 Check_Arg_Is_String_Literal (Arg1);
9239 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
9241 when Pragma_Suppress =>
9242 Process_Suppress_Unsuppress (True);
9248 -- pragma Suppress_All;
9250 -- The only check made here is that the pragma appears in the
9251 -- proper place, i.e. following a compilation unit. If indeed
9252 -- it appears in this context, then the parser has already
9253 -- inserted an equivalent pragma Suppress (All_Checks) to get
9254 -- the required effect.
9256 when Pragma_Suppress_All =>
9258 Check_Arg_Count (0);
9260 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
9261 or else not Is_List_Member (N)
9262 or else List_Containing (N) /= Pragmas_After (Parent (N))
9265 ("misplaced pragma%, must follow compilation unit");
9268 -------------------------
9269 -- Suppress_Debug_Info --
9270 -------------------------
9272 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
9274 when Pragma_Suppress_Debug_Info =>
9276 Check_Arg_Count (1);
9277 Check_Arg_Is_Local_Name (Arg1);
9278 Check_Optional_Identifier (Arg1, Name_Entity);
9279 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
9281 ----------------------------------
9282 -- Suppress_Exception_Locations --
9283 ----------------------------------
9285 -- pragma Suppress_Exception_Locations;
9287 when Pragma_Suppress_Exception_Locations =>
9289 Check_Arg_Count (0);
9290 Check_Valid_Configuration_Pragma;
9291 Exception_Locations_Suppressed := True;
9293 -----------------------------
9294 -- Suppress_Initialization --
9295 -----------------------------
9297 -- pragma Suppress_Initialization ([Entity =>] type_Name);
9299 when Pragma_Suppress_Initialization => Suppress_Init : declare
9305 Check_Arg_Count (1);
9306 Check_Optional_Identifier (Arg1, Name_Entity);
9307 Check_Arg_Is_Local_Name (Arg1);
9309 E_Id := Expression (Arg1);
9311 if Etype (E_Id) = Any_Type then
9318 if Is_Incomplete_Or_Private_Type (E) then
9319 if No (Full_View (Base_Type (E))) then
9321 ("argument of pragma% cannot be an incomplete type",
9324 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
9327 Set_Suppress_Init_Proc (Base_Type (E));
9332 ("pragma% requires argument that is a type name", Arg1);
9340 -- pragma System_Name (DIRECT_NAME);
9342 -- Syntax check: one argument, which must be the identifier GNAT
9343 -- or the identifier GCC, no other identifiers are acceptable.
9345 when Pragma_System_Name =>
9346 Check_No_Identifiers;
9347 Check_Arg_Count (1);
9348 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
9350 -----------------------------
9351 -- Task_Dispatching_Policy --
9352 -----------------------------
9354 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
9356 when Pragma_Task_Dispatching_Policy => declare
9360 Check_Ada_83_Warning;
9361 Check_Arg_Count (1);
9362 Check_No_Identifiers;
9363 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9364 Check_Valid_Configuration_Pragma;
9365 Get_Name_String (Chars (Expression (Arg1)));
9366 DP := Fold_Upper (Name_Buffer (1));
9368 if Task_Dispatching_Policy /= ' '
9369 and then Task_Dispatching_Policy /= DP
9371 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9373 ("task dispatching policy incompatible with policy#");
9375 -- Set new policy, but always preserve System_Location since
9376 -- we like the error message with the run time name.
9379 Task_Dispatching_Policy := DP;
9381 if Task_Dispatching_Policy_Sloc /= System_Location then
9382 Task_Dispatching_Policy_Sloc := Loc;
9391 -- pragma Task_Info (EXPRESSION);
9393 when Pragma_Task_Info => Task_Info : declare
9394 P : constant Node_Id := Parent (N);
9399 if Nkind (P) /= N_Task_Definition then
9400 Error_Pragma ("pragma% must appear in task definition");
9403 Check_No_Identifiers;
9404 Check_Arg_Count (1);
9406 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
9408 if Etype (Expression (Arg1)) = Any_Type then
9412 if Has_Task_Info_Pragma (P) then
9413 Error_Pragma ("duplicate pragma% not allowed");
9415 Set_Has_Task_Info_Pragma (P, True);
9423 -- pragma Task_Name (string_EXPRESSION);
9425 when Pragma_Task_Name => Task_Name : declare
9426 -- pragma Priority (EXPRESSION);
9428 P : constant Node_Id := Parent (N);
9432 Check_No_Identifiers;
9433 Check_Arg_Count (1);
9435 Arg := Expression (Arg1);
9436 Analyze_And_Resolve (Arg, Standard_String);
9438 if Nkind (P) /= N_Task_Definition then
9442 if Has_Task_Name_Pragma (P) then
9443 Error_Pragma ("duplicate pragma% not allowed");
9445 Set_Has_Task_Name_Pragma (P, True);
9446 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9454 -- pragma Task_Storage (
9455 -- [Task_Type =>] LOCAL_NAME,
9456 -- [Top_Guard =>] static_integer_EXPRESSION);
9458 when Pragma_Task_Storage => Task_Storage : declare
9459 Args : Args_List (1 .. 2);
9460 Names : constant Name_List (1 .. 2) := (
9464 Task_Type : Node_Id renames Args (1);
9465 Top_Guard : Node_Id renames Args (2);
9471 Gather_Associations (Names, Args);
9473 if No (Task_Type) then
9475 ("missing task_type argument for pragma%");
9478 Check_Arg_Is_Local_Name (Task_Type);
9480 Ent := Entity (Task_Type);
9482 if not Is_Task_Type (Ent) then
9484 ("argument for pragma% must be task type", Task_Type);
9487 if No (Top_Guard) then
9489 ("pragma% takes two arguments", Task_Type);
9491 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
9494 Check_First_Subtype (Task_Type);
9496 if Rep_Item_Too_Late (Ent, N) then
9505 -- pragma Thread_Body
9506 -- ( [Entity =>] LOCAL_NAME
9507 -- [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);
9509 when Pragma_Thread_Body => Thread_Body : declare
9516 Check_At_Least_N_Arguments (1);
9517 Check_At_Most_N_Arguments (2);
9518 Check_Optional_Identifier (Arg1, Name_Entity);
9519 Check_Arg_Is_Local_Name (Arg1);
9521 Id := Expression (Arg1);
9523 if not Is_Entity_Name (Id)
9524 or else not Is_Subprogram (Entity (Id))
9526 Error_Pragma_Arg ("subprogram name required", Arg1);
9531 -- Go to renamed subprogram if present, since Thread_Body applies
9532 -- to the actual renamed entity, not to the renaming entity.
9534 if Present (Alias (E))
9535 and then Nkind (Parent (Declaration_Node (E))) =
9536 N_Subprogram_Renaming_Declaration
9541 -- Various error checks
9543 if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
9545 ("pragma% requires separate spec and must come before body");
9547 elsif Rep_Item_Too_Early (E, N)
9549 Rep_Item_Too_Late (E, N)
9553 elsif Is_Thread_Body (E) then
9555 ("only one thread body pragma allowed", Arg1);
9557 elsif Present (Homonym (E))
9558 and then Scope (Homonym (E)) = Current_Scope
9561 ("thread body subprogram must not be overloaded", Arg1);
9564 Set_Is_Thread_Body (E);
9566 -- Deal with secondary stack argument
9568 if Arg_Count = 2 then
9569 Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
9570 SS := Expression (Arg2);
9571 Analyze_And_Resolve (SS, Any_Integer);
9579 -- pragma Time_Slice (static_duration_EXPRESSION);
9581 when Pragma_Time_Slice => Time_Slice : declare
9587 Check_Arg_Count (1);
9588 Check_No_Identifiers;
9589 Check_In_Main_Program;
9590 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
9592 if not Error_Posted (Arg1) then
9594 while Present (Nod) loop
9595 if Nkind (Nod) = N_Pragma
9596 and then Chars (Nod) = Name_Time_Slice
9598 Error_Msg_Name_1 := Chars (N);
9599 Error_Msg_N ("duplicate pragma% not permitted", Nod);
9606 -- Process only if in main unit
9608 if Get_Source_Unit (Loc) = Main_Unit then
9609 Opt.Time_Slice_Set := True;
9610 Val := Expr_Value_R (Expression (Arg1));
9612 if Val <= Ureal_0 then
9613 Opt.Time_Slice_Value := 0;
9615 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
9616 Opt.Time_Slice_Value := 1_000_000_000;
9619 Opt.Time_Slice_Value :=
9620 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
9629 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
9631 -- TITLING_OPTION ::=
9632 -- [Title =>] STRING_LITERAL
9633 -- | [Subtitle =>] STRING_LITERAL
9635 when Pragma_Title => Title : declare
9636 Args : Args_List (1 .. 2);
9637 Names : constant Name_List (1 .. 2) := (
9643 Gather_Associations (Names, Args);
9645 for J in 1 .. 2 loop
9646 if Present (Args (J)) then
9647 Check_Arg_Is_String_Literal (Args (J));
9652 ---------------------
9653 -- Unchecked_Union --
9654 ---------------------
9656 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
9658 when Pragma_Unchecked_Union => Unchecked_Union : declare
9659 Assoc : constant Node_Id := Arg1;
9660 Type_Id : constant Node_Id := Expression (Assoc);
9671 Check_No_Identifiers;
9672 Check_Arg_Count (1);
9673 Check_Arg_Is_Local_Name (Arg1);
9675 Find_Type (Type_Id);
9676 Typ := Entity (Type_Id);
9679 or else Rep_Item_Too_Early (Typ, N)
9683 Typ := Underlying_Type (Typ);
9686 if Rep_Item_Too_Late (Typ, N) then
9690 Check_First_Subtype (Arg1);
9692 -- Note remaining cases are references to a type in the current
9693 -- declarative part. If we find an error, we post the error on
9694 -- the relevant type declaration at an appropriate point.
9696 if not Is_Record_Type (Typ) then
9697 Error_Msg_N ("Unchecked_Union must be record type", Typ);
9700 elsif Is_Tagged_Type (Typ) then
9701 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
9704 elsif Is_Limited_Type (Typ) then
9706 ("Unchecked_Union must not be limited record type", Typ);
9707 Explain_Limited_Type (Typ, Typ);
9711 if not Has_Discriminants (Typ) then
9713 ("Unchecked_Union must have one discriminant", Typ);
9717 Discr := First_Discriminant (Typ);
9719 if Present (Next_Discriminant (Discr)) then
9721 ("Unchecked_Union must have exactly one discriminant",
9722 Next_Discriminant (Discr));
9726 if No (Discriminant_Default_Value (Discr)) then
9728 ("Unchecked_Union discriminant must have default value",
9732 Tdef := Type_Definition (Declaration_Node (Typ));
9733 Clist := Component_List (Tdef);
9735 Comp := First (Component_Items (Clist));
9736 while Present (Comp) loop
9738 Check_Component (Comp);
9743 if No (Clist) or else No (Variant_Part (Clist)) then
9745 ("Unchecked_Union must have variant part",
9750 Vpart := Variant_Part (Clist);
9752 Variant := First (Variants (Vpart));
9753 while Present (Variant) loop
9754 Check_Variant (Variant);
9759 Set_Is_Unchecked_Union (Typ, True);
9760 Set_Convention (Typ, Convention_C);
9762 Set_Has_Unchecked_Union (Base_Type (Typ), True);
9763 Set_Is_Unchecked_Union (Base_Type (Typ), True);
9764 end Unchecked_Union;
9766 ------------------------
9767 -- Unimplemented_Unit --
9768 ------------------------
9770 -- pragma Unimplemented_Unit;
9772 -- Note: this only gives an error if we are generating code,
9773 -- or if we are in a generic library unit (where the pragma
9774 -- appears in the body, not in the spec).
9776 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
9777 Cunitent : constant Entity_Id :=
9778 Cunit_Entity (Get_Source_Unit (Loc));
9779 Ent_Kind : constant Entity_Kind :=
9784 Check_Arg_Count (0);
9786 if Operating_Mode = Generate_Code
9787 or else Ent_Kind = E_Generic_Function
9788 or else Ent_Kind = E_Generic_Procedure
9789 or else Ent_Kind = E_Generic_Package
9791 Get_Name_String (Chars (Cunitent));
9792 Set_Casing (Mixed_Case);
9793 Write_Str (Name_Buffer (1 .. Name_Len));
9794 Write_Str (" is not implemented");
9796 raise Unrecoverable_Error;
9798 end Unimplemented_Unit;
9800 --------------------
9801 -- Universal_Data --
9802 --------------------
9804 -- pragma Universal_Data [(library_unit_NAME)];
9806 when Pragma_Universal_Data =>
9809 -- If this is a configuration pragma, then set the universal
9810 -- addressing option, otherwise confirm that the pragma
9811 -- satisfies the requirements of library unit pragma placement
9812 -- and leave it to the GNAAMP back end to detect the pragma
9813 -- (avoids transitive setting of the option due to withed units).
9815 if Is_Configuration_Pragma then
9816 Universal_Addressing_On_AAMP := True;
9818 Check_Valid_Library_Unit_Pragma;
9821 if not AAMP_On_Target then
9822 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
9829 -- pragma Unreferenced (local_Name {, local_Name});
9831 when Pragma_Unreferenced => Unreferenced : declare
9834 Arg_Ent : Entity_Id;
9838 Check_At_Least_N_Arguments (1);
9841 while Present (Arg_Node) loop
9842 Check_No_Identifier (Arg_Node);
9844 -- Note that the analyze call done by Check_Arg_Is_Local_Name
9845 -- will in fact generate a reference, so that the entity will
9846 -- have a reference, which will inhibit any warnings about it
9847 -- not being referenced, and also properly show up in the ali
9848 -- file as a reference. But this reference is recorded before
9849 -- the Has_Pragma_Unreferenced flag is set, so that no warning
9850 -- is generated for this reference.
9852 Check_Arg_Is_Local_Name (Arg_Node);
9853 Arg_Expr := Get_Pragma_Arg (Arg_Node);
9855 if Is_Entity_Name (Arg_Expr) then
9856 Arg_Ent := Entity (Arg_Expr);
9858 -- If the entity is overloaded, the pragma applies to the
9859 -- most recent overloading, as documented. In this case,
9860 -- name resolution does not generate a reference, so it
9861 -- must be done here explicitly.
9863 if Is_Overloaded (Arg_Expr) then
9864 Generate_Reference (Arg_Ent, N);
9867 Set_Has_Pragma_Unreferenced (Arg_Ent);
9874 ------------------------------
9875 -- Unreserve_All_Interrupts --
9876 ------------------------------
9878 -- pragma Unreserve_All_Interrupts;
9880 when Pragma_Unreserve_All_Interrupts =>
9882 Check_Arg_Count (0);
9884 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
9885 Unreserve_All_Interrupts := True;
9892 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
9894 when Pragma_Unsuppress =>
9896 Process_Suppress_Unsuppress (False);
9902 -- pragma Use_VADS_Size;
9904 when Pragma_Use_VADS_Size =>
9906 Check_Arg_Count (0);
9907 Check_Valid_Configuration_Pragma;
9908 Use_VADS_Size := True;
9910 ---------------------
9911 -- Validity_Checks --
9912 ---------------------
9914 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
9916 when Pragma_Validity_Checks => Validity_Checks : declare
9917 A : constant Node_Id := Expression (Arg1);
9923 Check_Arg_Count (1);
9924 Check_No_Identifiers;
9926 if Nkind (A) = N_String_Literal then
9930 Slen : constant Natural := Natural (String_Length (S));
9931 Options : String (1 .. Slen);
9937 C := Get_String_Char (S, Int (J));
9938 exit when not In_Character_Range (C);
9939 Options (J) := Get_Character (C);
9942 Set_Validity_Check_Options (Options);
9950 elsif Nkind (A) = N_Identifier then
9952 if Chars (A) = Name_All_Checks then
9953 Set_Validity_Check_Options ("a");
9955 elsif Chars (A) = Name_On then
9956 Validity_Checks_On := True;
9958 elsif Chars (A) = Name_Off then
9959 Validity_Checks_On := False;
9963 end Validity_Checks;
9969 -- pragma Volatile (LOCAL_NAME);
9971 when Pragma_Volatile =>
9972 Process_Atomic_Shared_Volatile;
9974 -------------------------
9975 -- Volatile_Components --
9976 -------------------------
9978 -- pragma Volatile_Components (array_LOCAL_NAME);
9980 -- Volatile is handled by the same circuit as Atomic_Components
9986 -- pragma Warnings (On | Off, [LOCAL_NAME])
9988 when Pragma_Warnings => Warnings : begin
9990 Check_At_Least_N_Arguments (1);
9991 Check_At_Most_N_Arguments (2);
9992 Check_No_Identifiers;
9994 -- One argument case was processed by parser in Par.Prag
9996 if Arg_Count /= 1 then
9997 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9998 Check_Arg_Count (2);
10005 E_Id := Expression (Arg2);
10008 -- In the expansion of an inlined body, a reference to
10009 -- the formal may be wrapped in a conversion if the actual
10010 -- is a conversion. Retrieve the real entity name.
10012 if (In_Instance_Body
10013 or else In_Inlined_Body)
10014 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
10016 E_Id := Expression (E_Id);
10019 if not Is_Entity_Name (E_Id) then
10021 ("second argument of pragma% must be entity name",
10025 E := Entity (E_Id);
10031 Set_Warnings_Off (E,
10032 (Chars (Expression (Arg1)) = Name_Off));
10034 if Is_Enumeration_Type (E) then
10038 Lit := First_Literal (E);
10039 while Present (Lit) loop
10040 Set_Warnings_Off (Lit);
10041 Next_Literal (Lit);
10046 exit when No (Homonym (E));
10054 -------------------
10055 -- Weak_External --
10056 -------------------
10058 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
10060 when Pragma_Weak_External => Weak_External : declare
10065 Check_Arg_Count (1);
10066 Check_Optional_Identifier (Arg1, Name_Entity);
10067 Check_Arg_Is_Library_Level_Local_Name (Arg1);
10068 Ent := Entity (Expression (Arg1));
10070 if Rep_Item_Too_Early (Ent, N) then
10073 Ent := Underlying_Type (Ent);
10076 -- The only processing required is to link this item on to the
10077 -- list of rep items for the given entity. This is accomplished
10078 -- by the call to Rep_Item_Too_Late (when no error is detected
10079 -- and False is returned).
10081 if Rep_Item_Too_Late (Ent, N) then
10084 Set_Has_Gigi_Rep_Item (Ent);
10088 --------------------
10089 -- Unknown_Pragma --
10090 --------------------
10092 -- Should be impossible, since the case of an unknown pragma is
10093 -- separately processed before the case statement is entered.
10095 when Unknown_Pragma =>
10096 raise Program_Error;
10100 when Pragma_Exit => null;
10101 end Analyze_Pragma;
10103 ---------------------------------
10104 -- Delay_Config_Pragma_Analyze --
10105 ---------------------------------
10107 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
10109 return Chars (N) = Name_Interrupt_State;
10110 end Delay_Config_Pragma_Analyze;
10112 -------------------------
10113 -- Get_Base_Subprogram --
10114 -------------------------
10116 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
10117 Result : Entity_Id;
10120 -- Follow subprogram renaming chain
10123 while Is_Subprogram (Result)
10125 (Is_Generic_Instance (Result)
10126 or else Nkind (Parent (Declaration_Node (Result))) =
10127 N_Subprogram_Renaming_Declaration)
10128 and then Present (Alias (Result))
10130 Result := Alias (Result);
10134 end Get_Base_Subprogram;
10136 -----------------------------
10137 -- Is_Config_Static_String --
10138 -----------------------------
10140 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
10142 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
10143 -- This is an internal recursive function that is just like the
10144 -- outer function except that it adds the string to the name buffer
10145 -- rather than placing the string in the name buffer.
10147 ------------------------------
10148 -- Add_Config_Static_String --
10149 ------------------------------
10151 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
10158 if Nkind (N) = N_Op_Concat then
10159 if Add_Config_Static_String (Left_Opnd (N)) then
10160 N := Right_Opnd (N);
10166 if Nkind (N) /= N_String_Literal then
10167 Error_Msg_N ("string literal expected for pragma argument", N);
10171 for J in 1 .. String_Length (Strval (N)) loop
10172 C := Get_String_Char (Strval (N), J);
10174 if not In_Character_Range (C) then
10176 ("string literal contains invalid wide character",
10177 Sloc (N) + 1 + Source_Ptr (J));
10181 Add_Char_To_Name_Buffer (Get_Character (C));
10186 end Add_Config_Static_String;
10188 -- Start of prorcessing for Is_Config_Static_String
10193 return Add_Config_Static_String (Arg);
10194 end Is_Config_Static_String;
10196 -----------------------------------------
10197 -- Is_Non_Significant_Pragma_Reference --
10198 -----------------------------------------
10200 -- This function makes use of the following static table which indicates
10201 -- whether a given pragma is significant. A value of -1 in this table
10202 -- indicates that the reference is significant. A value of zero indicates
10203 -- than appearence as any argument is insignificant, a positive value
10204 -- indicates that appearence in that parameter position is significant.
10206 Sig_Flags : constant array (Pragma_Id) of Int :=
10208 (Pragma_AST_Entry => -1,
10209 Pragma_Abort_Defer => -1,
10210 Pragma_Ada_83 => -1,
10211 Pragma_Ada_95 => -1,
10212 Pragma_Ada_05 => -1,
10213 Pragma_All_Calls_Remote => -1,
10214 Pragma_Annotate => -1,
10215 Pragma_Assert => -1,
10216 Pragma_Asynchronous => -1,
10217 Pragma_Atomic => 0,
10218 Pragma_Atomic_Components => 0,
10219 Pragma_Attach_Handler => -1,
10220 Pragma_CPP_Class => 0,
10221 Pragma_CPP_Constructor => 0,
10222 Pragma_CPP_Virtual => 0,
10223 Pragma_CPP_Vtable => 0,
10224 Pragma_C_Pass_By_Copy => 0,
10225 Pragma_Comment => 0,
10226 Pragma_Common_Object => -1,
10227 Pragma_Compile_Time_Warning => -1,
10228 Pragma_Complex_Representation => 0,
10229 Pragma_Component_Alignment => -1,
10230 Pragma_Controlled => 0,
10231 Pragma_Convention => 0,
10232 Pragma_Convention_Identifier => 0,
10233 Pragma_Debug => -1,
10234 Pragma_Detect_Blocking => -1,
10235 Pragma_Discard_Names => 0,
10236 Pragma_Elaborate => -1,
10237 Pragma_Elaborate_All => -1,
10238 Pragma_Elaborate_Body => -1,
10239 Pragma_Elaboration_Checks => -1,
10240 Pragma_Eliminate => -1,
10241 Pragma_Explicit_Overriding => -1,
10242 Pragma_Export => -1,
10243 Pragma_Export_Exception => -1,
10244 Pragma_Export_Function => -1,
10245 Pragma_Export_Object => -1,
10246 Pragma_Export_Procedure => -1,
10247 Pragma_Export_Value => -1,
10248 Pragma_Export_Valued_Procedure => -1,
10249 Pragma_Extend_System => -1,
10250 Pragma_Extensions_Allowed => -1,
10251 Pragma_External => -1,
10252 Pragma_External_Name_Casing => -1,
10253 Pragma_Finalize_Storage_Only => 0,
10254 Pragma_Float_Representation => 0,
10255 Pragma_Ident => -1,
10256 Pragma_Import => +2,
10257 Pragma_Import_Exception => 0,
10258 Pragma_Import_Function => 0,
10259 Pragma_Import_Object => 0,
10260 Pragma_Import_Procedure => 0,
10261 Pragma_Import_Valued_Procedure => 0,
10262 Pragma_Initialize_Scalars => -1,
10263 Pragma_Inline => 0,
10264 Pragma_Inline_Always => 0,
10265 Pragma_Inline_Generic => 0,
10266 Pragma_Inspection_Point => -1,
10267 Pragma_Interface => +2,
10268 Pragma_Interface_Name => +2,
10269 Pragma_Interrupt_Handler => -1,
10270 Pragma_Interrupt_Priority => -1,
10271 Pragma_Interrupt_State => -1,
10272 Pragma_Java_Constructor => -1,
10273 Pragma_Java_Interface => -1,
10274 Pragma_Keep_Names => 0,
10275 Pragma_License => -1,
10276 Pragma_Link_With => -1,
10277 Pragma_Linker_Alias => -1,
10278 Pragma_Linker_Options => -1,
10279 Pragma_Linker_Section => -1,
10281 Pragma_Locking_Policy => -1,
10282 Pragma_Long_Float => -1,
10283 Pragma_Machine_Attribute => -1,
10285 Pragma_Main_Storage => -1,
10286 Pragma_Memory_Size => -1,
10287 Pragma_No_Return => 0,
10288 Pragma_No_Run_Time => -1,
10289 Pragma_No_Strict_Aliasing => -1,
10290 Pragma_Normalize_Scalars => -1,
10291 Pragma_Obsolescent => 0,
10292 Pragma_Optimize => -1,
10293 Pragma_Optional_Overriding => -1,
10294 Pragma_Overriding => -1,
10297 Pragma_Passive => -1,
10298 Pragma_Polling => -1,
10299 Pragma_Persistent_Data => -1,
10300 Pragma_Persistent_Object => -1,
10301 Pragma_Preelaborate => -1,
10302 Pragma_Priority => -1,
10303 Pragma_Profile => 0,
10304 Pragma_Profile_Warnings => 0,
10305 Pragma_Propagate_Exceptions => -1,
10306 Pragma_Psect_Object => -1,
10308 Pragma_Pure_Function => 0,
10309 Pragma_Queuing_Policy => -1,
10310 Pragma_Ravenscar => -1,
10311 Pragma_Remote_Call_Interface => -1,
10312 Pragma_Remote_Types => -1,
10313 Pragma_Restricted_Run_Time => -1,
10314 Pragma_Restriction_Warnings => -1,
10315 Pragma_Restrictions => -1,
10316 Pragma_Reviewable => -1,
10317 Pragma_Share_Generic => -1,
10318 Pragma_Shared => -1,
10319 Pragma_Shared_Passive => -1,
10320 Pragma_Source_File_Name => -1,
10321 Pragma_Source_File_Name_Project => -1,
10322 Pragma_Source_Reference => -1,
10323 Pragma_Storage_Size => -1,
10324 Pragma_Storage_Unit => -1,
10325 Pragma_Stream_Convert => -1,
10326 Pragma_Style_Checks => -1,
10327 Pragma_Subtitle => -1,
10328 Pragma_Suppress => 0,
10329 Pragma_Suppress_Exception_Locations => 0,
10330 Pragma_Suppress_All => -1,
10331 Pragma_Suppress_Debug_Info => 0,
10332 Pragma_Suppress_Initialization => 0,
10333 Pragma_System_Name => -1,
10334 Pragma_Task_Dispatching_Policy => -1,
10335 Pragma_Task_Info => -1,
10336 Pragma_Task_Name => -1,
10337 Pragma_Task_Storage => 0,
10338 Pragma_Thread_Body => +2,
10339 Pragma_Time_Slice => -1,
10340 Pragma_Title => -1,
10341 Pragma_Unchecked_Union => 0,
10342 Pragma_Unimplemented_Unit => -1,
10343 Pragma_Universal_Data => -1,
10344 Pragma_Unreferenced => -1,
10345 Pragma_Unreserve_All_Interrupts => -1,
10346 Pragma_Unsuppress => 0,
10347 Pragma_Use_VADS_Size => -1,
10348 Pragma_Validity_Checks => -1,
10349 Pragma_Volatile => 0,
10350 Pragma_Volatile_Components => 0,
10351 Pragma_Warnings => -1,
10352 Pragma_Weak_External => 0,
10353 Unknown_Pragma => 0);
10355 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
10363 if Nkind (P) /= N_Pragma_Argument_Association then
10367 C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
10377 A := First (Pragma_Argument_Associations (Parent (P)));
10378 for J in 1 .. C - 1 loop
10389 end Is_Non_Significant_Pragma_Reference;
10391 ------------------------------
10392 -- Is_Pragma_String_Literal --
10393 ------------------------------
10395 -- This function returns true if the corresponding pragma argument is
10396 -- a static string expression. These are the only cases in which string
10397 -- literals can appear as pragma arguments. We also allow a string
10398 -- literal as the first argument to pragma Assert (although it will
10399 -- of course always generate a type error).
10401 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
10402 Pragn : constant Node_Id := Parent (Par);
10403 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
10404 Pname : constant Name_Id := Chars (Pragn);
10410 N := First (Assoc);
10417 if Pname = Name_Assert then
10420 elsif Pname = Name_Export then
10423 elsif Pname = Name_Ident then
10426 elsif Pname = Name_Import then
10429 elsif Pname = Name_Interface_Name then
10432 elsif Pname = Name_Linker_Alias then
10435 elsif Pname = Name_Linker_Section then
10438 elsif Pname = Name_Machine_Attribute then
10441 elsif Pname = Name_Source_File_Name then
10444 elsif Pname = Name_Source_Reference then
10447 elsif Pname = Name_Title then
10450 elsif Pname = Name_Subtitle then
10456 end Is_Pragma_String_Literal;
10458 --------------------------------------
10459 -- Process_Compilation_Unit_Pragmas --
10460 --------------------------------------
10462 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
10464 -- A special check for pragma Suppress_All. This is a strange DEC
10465 -- pragma, strange because it comes at the end of the unit. If we
10466 -- have a pragma Suppress_All in the Pragmas_After of the current
10467 -- unit, then we insert a pragma Suppress (All_Checks) at the start
10468 -- of the context clause to ensure the correct processing.
10471 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
10475 if Present (PA) then
10477 while Present (P) loop
10478 if Chars (P) = Name_Suppress_All then
10479 Prepend_To (Context_Items (N),
10480 Make_Pragma (Sloc (P),
10481 Chars => Name_Suppress,
10482 Pragma_Argument_Associations => New_List (
10483 Make_Pragma_Argument_Association (Sloc (P),
10485 Make_Identifier (Sloc (P),
10486 Chars => Name_All_Checks)))));
10494 end Process_Compilation_Unit_Pragmas;
10496 --------------------------------
10497 -- Set_Encoded_Interface_Name --
10498 --------------------------------
10500 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
10501 Str : constant String_Id := Strval (S);
10502 Len : constant Int := String_Length (Str);
10507 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
10510 -- Stores encoded value of character code CC. The encoding we
10511 -- use an underscore followed by four lower case hex digits.
10517 procedure Encode is
10519 Store_String_Char (Get_Char_Code ('_'));
10521 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
10523 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
10525 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
10527 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
10530 -- Start of processing for Set_Encoded_Interface_Name
10533 -- If first character is asterisk, this is a link name, and we
10534 -- leave it completely unmodified. We also ignore null strings
10535 -- (the latter case happens only in error cases) and no encoding
10536 -- should occur for Java interface names.
10539 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
10542 Set_Interface_Name (E, S);
10547 CC := Get_String_Char (Str, J);
10549 exit when not In_Character_Range (CC);
10551 C := Get_Character (CC);
10553 exit when C /= '_' and then C /= '$'
10554 and then C not in '0' .. '9'
10555 and then C not in 'a' .. 'z'
10556 and then C not in 'A' .. 'Z';
10559 Set_Interface_Name (E, S);
10567 -- Here we need to encode. The encoding we use as follows:
10568 -- three underscores + four hex digits (lower case)
10572 for J in 1 .. String_Length (Str) loop
10573 CC := Get_String_Char (Str, J);
10575 if not In_Character_Range (CC) then
10578 C := Get_Character (CC);
10580 if C = '_' or else C = '$'
10581 or else C in '0' .. '9'
10582 or else C in 'a' .. 'z'
10583 or else C in 'A' .. 'Z'
10585 Store_String_Char (CC);
10592 Set_Interface_Name (E,
10593 Make_String_Literal (Sloc (S),
10594 Strval => End_String));
10596 end Set_Encoded_Interface_Name;
10598 -------------------
10599 -- Set_Unit_Name --
10600 -------------------
10602 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
10607 if Nkind (N) = N_Identifier
10608 and then Nkind (With_Item) = N_Identifier
10610 Set_Entity (N, Entity (With_Item));
10612 elsif Nkind (N) = N_Selected_Component then
10613 Change_Selected_Component_To_Expanded_Name (N);
10614 Set_Entity (N, Entity (With_Item));
10615 Set_Entity (Selector_Name (N), Entity (N));
10617 Pref := Prefix (N);
10618 Scop := Scope (Entity (N));
10619 while Nkind (Pref) = N_Selected_Component loop
10620 Change_Selected_Component_To_Expanded_Name (Pref);
10621 Set_Entity (Selector_Name (Pref), Scop);
10622 Set_Entity (Pref, Scop);
10623 Pref := Prefix (Pref);
10624 Scop := Scope (Scop);
10627 Set_Entity (Pref, Scop);
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