1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2007, 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 3, 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 COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- This unit contains the semantic processing for all pragmas, both language
27 -- and implementation defined. For most pragmas, the parser only does the
28 -- most basic job of checking the syntax, so Sem_Prag also contains the code
29 -- to complete the syntax checks. Certain pragmas are handled partially or
30 -- completely by the parser (see Par.Prag for further details).
32 with Atree; use Atree;
33 with Casing; use Casing;
34 with Checks; use Checks;
35 with Csets; use Csets;
36 with Debug; use Debug;
37 with Einfo; use Einfo;
38 with Errout; use Errout;
39 with Exp_Dist; use Exp_Dist;
41 with Lib.Writ; use Lib.Writ;
42 with Lib.Xref; use Lib.Xref;
43 with Namet; use Namet;
44 with Nlists; use Nlists;
45 with Nmake; use Nmake;
47 with Output; use Output;
48 with Restrict; use Restrict;
49 with Rident; use Rident;
50 with Rtsfind; use Rtsfind;
52 with Sem_Ch3; use Sem_Ch3;
53 with Sem_Ch8; use Sem_Ch8;
54 with Sem_Ch13; use Sem_Ch13;
55 with Sem_Dist; use Sem_Dist;
56 with Sem_Elim; use Sem_Elim;
57 with Sem_Eval; use Sem_Eval;
58 with Sem_Intr; use Sem_Intr;
59 with Sem_Mech; use Sem_Mech;
60 with Sem_Res; use Sem_Res;
61 with Sem_Type; use Sem_Type;
62 with Sem_Util; use Sem_Util;
63 with Sem_VFpt; use Sem_VFpt;
64 with Sem_Warn; use Sem_Warn;
65 with Stand; use Stand;
66 with Sinfo; use Sinfo;
67 with Sinfo.CN; use Sinfo.CN;
68 with Sinput; use Sinput;
69 with Snames; use Snames;
70 with Stringt; use Stringt;
71 with Stylesw; use Stylesw;
73 with Targparm; use Targparm;
74 with Tbuild; use Tbuild;
76 with Uintp; use Uintp;
77 with Urealp; use Urealp;
78 with Validsw; use Validsw;
80 with GNAT.Spelling_Checker; use GNAT.Spelling_Checker;
82 package body Sem_Prag is
84 ----------------------------------------------
85 -- Common Handling of Import-Export Pragmas --
86 ----------------------------------------------
88 -- In the following section, a number of Import_xxx and Export_xxx
89 -- pragmas are defined by GNAT. These are compatible with the DEC
90 -- pragmas of the same name, and all have the following common
91 -- form and processing:
94 -- [Internal =>] LOCAL_NAME,
95 -- [, [External =>] EXTERNAL_SYMBOL]
96 -- [, other optional parameters ]);
99 -- [Internal =>] LOCAL_NAME,
100 -- [, [External =>] EXTERNAL_SYMBOL]
101 -- [, other optional parameters ]);
103 -- EXTERNAL_SYMBOL ::=
105 -- | static_string_EXPRESSION
107 -- The internal LOCAL_NAME designates the entity that is imported or
108 -- exported, and must refer to an entity in the current declarative
109 -- part (as required by the rules for LOCAL_NAME).
111 -- The external linker name is designated by the External parameter
112 -- if given, or the Internal parameter if not (if there is no External
113 -- parameter, the External parameter is a copy of the Internal name).
115 -- If the External parameter is given as a string, then this string
116 -- is treated as an external name (exactly as though it had been given
117 -- as an External_Name parameter for a normal Import pragma).
119 -- If the External parameter is given as an identifier (or there is no
120 -- External parameter, so that the Internal identifier is used), then
121 -- the external name is the characters of the identifier, translated
122 -- to all upper case letters for OpenVMS versions of GNAT, and to all
123 -- lower case letters for all other versions
125 -- Note: the external name specified or implied by any of these special
126 -- Import_xxx or Export_xxx pragmas override an external or link name
127 -- specified in a previous Import or Export pragma.
129 -- Note: these and all other DEC-compatible GNAT pragmas allow full
130 -- use of named notation, following the standard rules for subprogram
131 -- calls, i.e. parameters can be given in any order if named notation
132 -- is used, and positional and named notation can be mixed, subject to
133 -- the rule that all positional parameters must appear first.
135 -- Note: All these pragmas are implemented exactly following the DEC
136 -- design and implementation and are intended to be fully compatible
137 -- with the use of these pragmas in the DEC Ada compiler.
139 --------------------------------------------
140 -- Checking for Duplicated External Names --
141 --------------------------------------------
143 -- It is suspicious if two separate Export pragmas use the same external
144 -- name. The following table is used to diagnose this situation so that
145 -- an appropriate warning can be issued.
147 -- The Node_Id stored is for the N_String_Literal node created to
148 -- hold the value of the external name. The Sloc of this node is
149 -- used to cross-reference the location of the duplication.
151 package Externals is new Table.Table (
152 Table_Component_Type => Node_Id,
153 Table_Index_Type => Int,
154 Table_Low_Bound => 0,
155 Table_Initial => 100,
156 Table_Increment => 100,
157 Table_Name => "Name_Externals");
159 -------------------------------------
160 -- Local Subprograms and Variables --
161 -------------------------------------
163 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
164 -- This routine is used for possible casing adjustment of an explicit
165 -- external name supplied as a string literal (the node N), according
166 -- to the casing requirement of Opt.External_Name_Casing. If this is
167 -- set to As_Is, then the string literal is returned unchanged, but if
168 -- it is set to Uppercase or Lowercase, then a new string literal with
169 -- appropriate casing is constructed.
171 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
172 -- If Def_Id refers to a renamed subprogram, then the base subprogram
173 -- (the original one, following the renaming chain) is returned.
174 -- Otherwise the entity is returned unchanged. Should be in Einfo???
177 -- This is a dummy function called by the processing for pragma Reviewable.
178 -- It is there for assisting front end debugging. By placing a Reviewable
179 -- pragma in the source program, a breakpoint on rv catches this place in
180 -- the source, allowing convenient stepping to the point of interest.
182 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
183 -- Place semantic information on the argument of an Elaborate or
184 -- Elaborate_All pragma. Entity name for unit and its parents is
185 -- taken from item in previous with_clause that mentions the unit.
187 -------------------------------
188 -- Adjust_External_Name_Case --
189 -------------------------------
191 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
195 -- Adjust case of literal if required
197 if Opt.External_Name_Exp_Casing = As_Is then
201 -- Copy existing string
207 for J in 1 .. String_Length (Strval (N)) loop
208 CC := Get_String_Char (Strval (N), J);
210 if Opt.External_Name_Exp_Casing = Uppercase
211 and then CC >= Get_Char_Code ('a')
212 and then CC <= Get_Char_Code ('z')
214 Store_String_Char (CC - 32);
216 elsif Opt.External_Name_Exp_Casing = Lowercase
217 and then CC >= Get_Char_Code ('A')
218 and then CC <= Get_Char_Code ('Z')
220 Store_String_Char (CC + 32);
223 Store_String_Char (CC);
228 Make_String_Literal (Sloc (N),
229 Strval => End_String);
231 end Adjust_External_Name_Case;
237 procedure Analyze_Pragma (N : Node_Id) is
238 Loc : constant Source_Ptr := Sloc (N);
241 Pragma_Exit : exception;
242 -- This exception is used to exit pragma processing completely. It
243 -- is used when an error is detected, and no further processing is
244 -- required. It is also used if an earlier error has left the tree
245 -- in a state where the pragma should not be processed.
248 -- Number of pragma argument associations
254 -- First four pragma arguments (pragma argument association nodes,
255 -- or Empty if the corresponding argument does not exist).
257 type Name_List is array (Natural range <>) of Name_Id;
258 type Args_List is array (Natural range <>) of Node_Id;
259 -- Types used for arguments to Check_Arg_Order and Gather_Associations
261 procedure Ada_2005_Pragma;
262 -- Called for pragmas defined in Ada 2005, that are not in Ada 95. In
263 -- Ada 95 mode, these are implementation defined pragmas, so should be
264 -- caught by the No_Implementation_Pragmas restriction
266 procedure Check_Ada_83_Warning;
267 -- Issues a warning message for the current pragma if operating in Ada
268 -- 83 mode (used for language pragmas that are not a standard part of
269 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
272 procedure Check_Arg_Count (Required : Nat);
273 -- Check argument count for pragma is equal to given parameter.
274 -- If not, then issue an error message and raise Pragma_Exit.
276 -- Note: all routines whose name is Check_Arg_Is_xxx take an
277 -- argument Arg which can either be a pragma argument association,
278 -- in which case the check is applied to the expression of the
279 -- association or an expression directly.
281 procedure Check_Arg_Is_External_Name (Arg : Node_Id);
282 -- Check that an argument has the right form for an EXTERNAL_NAME
283 -- parameter of an extended import/export pragma. The rule is that
284 -- the name must be an identifier or string literal (in Ada 83 mode)
285 -- or a static string expression (in Ada 95 mode).
287 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
288 -- Check the specified argument Arg to make sure that it is an
289 -- identifier. If not give error and raise Pragma_Exit.
291 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
292 -- Check the specified argument Arg to make sure that it is an
293 -- integer literal. If not give error and raise Pragma_Exit.
295 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
296 -- Check the specified argument Arg to make sure that it has the
297 -- proper syntactic form for a local name and meets the semantic
298 -- requirements for a local name. The local name is analyzed as
299 -- part of the processing for this call. In addition, the local
300 -- name is required to represent an entity at the library level.
302 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
303 -- Check the specified argument Arg to make sure that it has the
304 -- proper syntactic form for a local name and meets the semantic
305 -- requirements for a local name. The local name is analyzed as
306 -- part of the processing for this call.
308 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
309 -- Check the specified argument Arg to make sure that it is a valid
310 -- locking policy name. If not give error and raise Pragma_Exit.
312 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
313 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
314 -- Check the specified argument Arg to make sure that it is an
315 -- identifier whose name matches either N1 or N2 (or N3 if present).
316 -- If not then give error and raise Pragma_Exit.
318 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
319 -- Check the specified argument Arg to make sure that it is a valid
320 -- queuing policy name. If not give error and raise Pragma_Exit.
322 procedure Check_Arg_Is_Static_Expression
325 -- Check the specified argument Arg to make sure that it is a static
326 -- expression of the given type (i.e. it will be analyzed and resolved
327 -- using this type, which can be any valid argument to Resolve, e.g.
328 -- Any_Integer is OK). If not, given error and raise Pragma_Exit.
330 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
331 -- Check the specified argument Arg to make sure that it is a
332 -- string literal. If not give error and raise Pragma_Exit
334 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
335 -- Check the specified argument Arg to make sure that it is a valid
336 -- valid task dispatching policy name. If not give error and raise
339 procedure Check_Arg_Order (Names : Name_List);
340 -- Checks for an instance of two arguments with identifiers for the
341 -- current pragma which are not in the sequence indicated by Names,
342 -- and if so, generates a fatal message about bad order of arguments.
344 procedure Check_At_Least_N_Arguments (N : Nat);
345 -- Check there are at least N arguments present
347 procedure Check_At_Most_N_Arguments (N : Nat);
348 -- Check there are no more than N arguments present
350 procedure Check_Component (Comp : Node_Id);
351 -- Examine Unchecked_Union component for correct use of per-object
352 -- constrained subtypes, and for restrictions on finalizable components.
354 procedure Check_Duplicated_Export_Name (Nam : Node_Id);
355 -- Nam is an N_String_Literal node containing the external name set
356 -- by an Import or Export pragma (or extended Import or Export pragma).
357 -- This procedure checks for possible duplications if this is the
358 -- export case, and if found, issues an appropriate error message.
360 procedure Check_First_Subtype (Arg : Node_Id);
361 -- Checks that Arg, whose expression is an entity name referencing
362 -- a subtype, does not reference a type that is not a first subtype.
364 procedure Check_In_Main_Program;
365 -- Common checks for pragmas that appear within a main program
366 -- (Priority, Main_Storage, Time_Slice).
368 procedure Check_Interrupt_Or_Attach_Handler;
369 -- Common processing for first argument of pragma Interrupt_Handler
370 -- or pragma Attach_Handler.
372 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
373 -- Check that pragma appears in a declarative part, or in a package
374 -- specification, i.e. that it does not occur in a statement sequence
377 procedure Check_No_Identifier (Arg : Node_Id);
378 -- Checks that the given argument does not have an identifier. If
379 -- an identifier is present, then an error message is issued, and
380 -- Pragma_Exit is raised.
382 procedure Check_No_Identifiers;
383 -- Checks that none of the arguments to the pragma has an identifier.
384 -- If any argument has an identifier, then an error message is issued,
385 -- and Pragma_Exit is raised.
387 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
388 -- Checks if the given argument has an identifier, and if so, requires
389 -- it to match the given identifier name. If there is a non-matching
390 -- identifier, then an error message is given and Error_Pragmas raised.
392 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
393 -- Checks if the given argument has an identifier, and if so, requires
394 -- it to match the given identifier name. If there is a non-matching
395 -- identifier, then an error message is given and Error_Pragmas raised.
396 -- In this version of the procedure, the identifier name is given as
397 -- a string with lower case letters.
399 procedure Check_Static_Constraint (Constr : Node_Id);
400 -- Constr is a constraint from an N_Subtype_Indication node from a
401 -- component constraint in an Unchecked_Union type. This routine checks
402 -- that the constraint is static as required by the restrictions for
405 procedure Check_Valid_Configuration_Pragma;
406 -- Legality checks for placement of a configuration pragma
408 procedure Check_Valid_Library_Unit_Pragma;
409 -- Legality checks for library unit pragmas. A special case arises for
410 -- pragmas in generic instances that come from copies of the original
411 -- library unit pragmas in the generic templates. In the case of other
412 -- than library level instantiations these can appear in contexts which
413 -- would normally be invalid (they only apply to the original template
414 -- and to library level instantiations), and they are simply ignored,
415 -- which is implemented by rewriting them as null statements.
417 procedure Check_Variant (Variant : Node_Id);
418 -- Check Unchecked_Union variant for lack of nested variants and
419 -- presence of at least one component.
421 procedure Error_Pragma (Msg : String);
422 pragma No_Return (Error_Pragma);
423 -- Outputs error message for current pragma. The message contains an %
424 -- that will be replaced with the pragma name, and the flag is placed
425 -- on the pragma itself. Pragma_Exit is then raised.
427 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
428 pragma No_Return (Error_Pragma_Arg);
429 -- Outputs error message for current pragma. The message may contain
430 -- a % that will be replaced with the pragma name. The parameter Arg
431 -- may either be a pragma argument association, in which case the flag
432 -- is placed on the expression of this association, or an expression,
433 -- in which case the flag is placed directly on the expression. The
434 -- message is placed using Error_Msg_N, so the message may also contain
435 -- an & insertion character which will reference the given Arg value.
436 -- After placing the message, Pragma_Exit is raised.
438 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
439 pragma No_Return (Error_Pragma_Arg);
440 -- Similar to above form of Error_Pragma_Arg except that two messages
441 -- are provided, the second is a continuation comment starting with \.
443 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
444 pragma No_Return (Error_Pragma_Arg_Ident);
445 -- Outputs error message for current pragma. The message may contain
446 -- a % that will be replaced with the pragma name. The parameter Arg
447 -- must be a pragma argument association with a non-empty identifier
448 -- (i.e. its Chars field must be set), and the error message is placed
449 -- on the identifier. The message is placed using Error_Msg_N so
450 -- the message may also contain an & insertion character which will
451 -- reference the identifier. After placing the message, Pragma_Exit
454 function Find_Lib_Unit_Name return Entity_Id;
455 -- Used for a library unit pragma to find the entity to which the
456 -- library unit pragma applies, returns the entity found.
458 procedure Find_Program_Unit_Name (Id : Node_Id);
459 -- If the pragma is a compilation unit pragma, the id must denote the
460 -- compilation unit in the same compilation, and the pragma must appear
461 -- in the list of preceding or trailing pragmas. If it is a program
462 -- unit pragma that is not a compilation unit pragma, then the
463 -- identifier must be visible.
465 function Find_Unique_Parameterless_Procedure
467 Arg : Node_Id) return Entity_Id;
468 -- Used for a procedure pragma to find the unique parameterless
469 -- procedure identified by Name, returns it if it exists, otherwise
470 -- errors out and uses Arg as the pragma argument for the message.
472 procedure Gather_Associations
474 Args : out Args_List);
475 -- This procedure is used to gather the arguments for a pragma that
476 -- permits arbitrary ordering of parameters using the normal rules
477 -- for named and positional parameters. The Names argument is a list
478 -- of Name_Id values that corresponds to the allowed pragma argument
479 -- association identifiers in order. The result returned in Args is
480 -- a list of corresponding expressions that are the pragma arguments.
481 -- Note that this is a list of expressions, not of pragma argument
482 -- associations (Gather_Associations has completely checked all the
483 -- optional identifiers when it returns). An entry in Args is Empty
484 -- on return if the corresponding argument is not present.
486 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
487 -- All the routines that check pragma arguments take either a pragma
488 -- argument association (in which case the expression of the argument
489 -- association is checked), or the expression directly. The function
490 -- Get_Pragma_Arg is a utility used to deal with these two cases. If
491 -- Arg is a pragma argument association node, then its expression is
492 -- returned, otherwise Arg is returned unchanged.
494 procedure GNAT_Pragma;
495 -- Called for all GNAT defined pragmas to check the relevant restriction
496 -- (No_Implementation_Pragmas).
498 function Is_Before_First_Decl
499 (Pragma_Node : Node_Id;
500 Decls : List_Id) return Boolean;
501 -- Return True if Pragma_Node is before the first declarative item in
502 -- Decls where Decls is the list of declarative items.
504 function Is_Configuration_Pragma return Boolean;
505 -- Deterermines if the placement of the current pragma is appropriate
506 -- for a configuration pragma (precedes the current compilation unit).
508 function Is_In_Context_Clause return Boolean;
509 -- Returns True if pragma appears within the context clause of a unit,
510 -- and False for any other placement (does not generate any messages).
512 function Is_Static_String_Expression (Arg : Node_Id) return Boolean;
513 -- Analyzes the argument, and determines if it is a static string
514 -- expression, returns True if so, False if non-static or not String.
516 procedure Pragma_Misplaced;
517 -- Issue fatal error message for misplaced pragma
519 procedure Process_Atomic_Shared_Volatile;
520 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
521 -- Shared is an obsolete Ada 83 pragma, treated as being identical
522 -- in effect to pragma Atomic.
524 procedure Process_Compile_Time_Warning_Or_Error;
525 -- Common processing for Compile_Time_Error and Compile_Time_Warning
527 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
528 -- Common procesing for Convention, Interface, Import and Export.
529 -- Checks first two arguments of pragma, and sets the appropriate
530 -- convention value in the specified entity or entities. On return
531 -- C is the convention, E is the referenced entity.
533 procedure Process_Extended_Import_Export_Exception_Pragma
534 (Arg_Internal : Node_Id;
535 Arg_External : Node_Id;
538 -- Common processing for the pragmas Import/Export_Exception.
539 -- The three arguments correspond to the three named parameters of
540 -- the pragma. An argument is empty if the corresponding parameter
541 -- is not present in the pragma.
543 procedure Process_Extended_Import_Export_Object_Pragma
544 (Arg_Internal : Node_Id;
545 Arg_External : Node_Id;
547 -- Common processing for the pragmass Import/Export_Object.
548 -- The three arguments correspond to the three named parameters
549 -- of the pragmas. An argument is empty if the corresponding
550 -- parameter is not present in the pragma.
552 procedure Process_Extended_Import_Export_Internal_Arg
553 (Arg_Internal : Node_Id := Empty);
554 -- Common processing for all extended Import and Export pragmas. The
555 -- argument is the pragma parameter for the Internal argument. If
556 -- Arg_Internal is empty or inappropriate, an error message is posted.
557 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
558 -- set to identify the referenced entity.
560 procedure Process_Extended_Import_Export_Subprogram_Pragma
561 (Arg_Internal : Node_Id;
562 Arg_External : Node_Id;
563 Arg_Parameter_Types : Node_Id;
564 Arg_Result_Type : Node_Id := Empty;
565 Arg_Mechanism : Node_Id;
566 Arg_Result_Mechanism : Node_Id := Empty;
567 Arg_First_Optional_Parameter : Node_Id := Empty);
568 -- Common processing for all extended Import and Export pragmas
569 -- applying to subprograms. The caller omits any arguments that do
570 -- bnot apply to the pragma in question (for example, Arg_Result_Type
571 -- can be non-Empty only in the Import_Function and Export_Function
572 -- cases). The argument names correspond to the allowed pragma
573 -- association identifiers.
575 procedure Process_Generic_List;
576 -- Common processing for Share_Generic and Inline_Generic
578 procedure Process_Import_Or_Interface;
579 -- Common processing for Import of Interface
581 procedure Process_Inline (Active : Boolean);
582 -- Common processing for Inline and Inline_Always. The parameter
583 -- indicates if the inline pragma is active, i.e. if it should
584 -- actually cause inlining to occur.
586 procedure Process_Interface_Name
587 (Subprogram_Def : Entity_Id;
590 -- Given the last two arguments of pragma Import, pragma Export, or
591 -- pragma Interface_Name, performs validity checks and sets the
592 -- Interface_Name field of the given subprogram entity to the
593 -- appropriate external or link name, depending on the arguments
594 -- given. Ext_Arg is always present, but Link_Arg may be missing.
595 -- Note that Ext_Arg may represent the Link_Name if Link_Arg is
596 -- missing, and appropriate named notation is used for Ext_Arg.
597 -- If neither Ext_Arg nor Link_Arg is present, the interface name
598 -- is set to the default from the subprogram name.
600 procedure Process_Interrupt_Or_Attach_Handler;
601 -- Common processing for Interrupt and Attach_Handler pragmas
603 procedure Process_Restrictions_Or_Restriction_Warnings (Warn : Boolean);
604 -- Common processing for Restrictions and Restriction_Warnings pragmas.
605 -- Warn is False for Restrictions, True for Restriction_Warnings.
607 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
608 -- Common processing for Suppress and Unsuppress. The boolean parameter
609 -- Suppress_Case is True for the Suppress case, and False for the
612 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
613 -- This procedure sets the Is_Exported flag for the given entity,
614 -- checking that the entity was not previously imported. Arg is
615 -- the argument that specified the entity. A check is also made
616 -- for exporting inappropriate entities.
618 procedure Set_Extended_Import_Export_External_Name
619 (Internal_Ent : Entity_Id;
620 Arg_External : Node_Id);
621 -- Common processing for all extended import export pragmas. The first
622 -- argument, Internal_Ent, is the internal entity, which has already
623 -- been checked for validity by the caller. Arg_External is from the
624 -- Import or Export pragma, and may be null if no External parameter
625 -- was present. If Arg_External is present and is a non-null string
626 -- (a null string is treated as the default), then the Interface_Name
627 -- field of Internal_Ent is set appropriately.
629 procedure Set_Imported (E : Entity_Id);
630 -- This procedure sets the Is_Imported flag for the given entity,
631 -- checking that it is not previously exported or imported.
633 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
634 -- Mech is a parameter passing mechanism (see Import_Function syntax
635 -- for MECHANISM_NAME). This routine checks that the mechanism argument
636 -- has the right form, and if not issues an error message. If the
637 -- argument has the right form then the Mechanism field of Ent is
638 -- set appropriately.
640 procedure Set_Ravenscar_Profile (N : Node_Id);
641 -- Activate the set of configuration pragmas and restrictions that
642 -- make up the Ravenscar Profile. N is the corresponding pragma
643 -- node, which is used for error messages on any constructs
644 -- that violate the profile.
646 ---------------------
647 -- Ada_2005_Pragma --
648 ---------------------
650 procedure Ada_2005_Pragma is
652 if Ada_Version <= Ada_95 then
653 Check_Restriction (No_Implementation_Pragmas, N);
657 --------------------------
658 -- Check_Ada_83_Warning --
659 --------------------------
661 procedure Check_Ada_83_Warning is
663 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
664 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
666 end Check_Ada_83_Warning;
668 ---------------------
669 -- Check_Arg_Count --
670 ---------------------
672 procedure Check_Arg_Count (Required : Nat) is
674 if Arg_Count /= Required then
675 Error_Pragma ("wrong number of arguments for pragma%");
679 --------------------------------
680 -- Check_Arg_Is_External_Name --
681 --------------------------------
683 procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
684 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
687 if Nkind (Argx) = N_Identifier then
691 Analyze_And_Resolve (Argx, Standard_String);
693 if Is_OK_Static_Expression (Argx) then
696 elsif Etype (Argx) = Any_Type then
699 -- An interesting special case, if we have a string literal and
700 -- we are in Ada 83 mode, then we allow it even though it will
701 -- not be flagged as static. This allows expected Ada 83 mode
702 -- use of external names which are string literals, even though
703 -- technically these are not static in Ada 83.
705 elsif Ada_Version = Ada_83
706 and then Nkind (Argx) = N_String_Literal
710 -- Static expression that raises Constraint_Error. This has
711 -- already been flagged, so just exit from pragma processing.
713 elsif Is_Static_Expression (Argx) then
716 -- Here we have a real error (non-static expression)
719 Error_Msg_Name_1 := Chars (N);
721 ("argument for pragma% must be a identifier or " &
722 "static string expression!", Argx);
726 end Check_Arg_Is_External_Name;
728 -----------------------------
729 -- Check_Arg_Is_Identifier --
730 -----------------------------
732 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
733 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
735 if Nkind (Argx) /= N_Identifier then
737 ("argument for pragma% must be identifier", Argx);
739 end Check_Arg_Is_Identifier;
741 ----------------------------------
742 -- Check_Arg_Is_Integer_Literal --
743 ----------------------------------
745 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
746 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
748 if Nkind (Argx) /= N_Integer_Literal then
750 ("argument for pragma% must be integer literal", Argx);
752 end Check_Arg_Is_Integer_Literal;
754 -------------------------------------------
755 -- Check_Arg_Is_Library_Level_Local_Name --
756 -------------------------------------------
760 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
761 -- | library_unit_NAME
763 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
765 Check_Arg_Is_Local_Name (Arg);
767 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
768 and then Comes_From_Source (N)
771 ("argument for pragma% must be library level entity", Arg);
773 end Check_Arg_Is_Library_Level_Local_Name;
775 -----------------------------
776 -- Check_Arg_Is_Local_Name --
777 -----------------------------
781 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
782 -- | library_unit_NAME
784 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
785 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
790 if Nkind (Argx) not in N_Direct_Name
791 and then (Nkind (Argx) /= N_Attribute_Reference
792 or else Present (Expressions (Argx))
793 or else Nkind (Prefix (Argx)) /= N_Identifier)
794 and then (not Is_Entity_Name (Argx)
795 or else not Is_Compilation_Unit (Entity (Argx)))
797 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
800 if Is_Entity_Name (Argx)
801 and then Scope (Entity (Argx)) /= Current_Scope
804 ("pragma% argument must be in same declarative part", Arg);
806 end Check_Arg_Is_Local_Name;
808 ---------------------------------
809 -- Check_Arg_Is_Locking_Policy --
810 ---------------------------------
812 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
813 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
816 Check_Arg_Is_Identifier (Argx);
818 if not Is_Locking_Policy_Name (Chars (Argx)) then
820 ("& is not a valid locking policy name", Argx);
822 end Check_Arg_Is_Locking_Policy;
824 -------------------------
825 -- Check_Arg_Is_One_Of --
826 -------------------------
828 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
829 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
832 Check_Arg_Is_Identifier (Argx);
834 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
835 Error_Msg_Name_2 := N1;
836 Error_Msg_Name_3 := N2;
837 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
839 end Check_Arg_Is_One_Of;
841 procedure Check_Arg_Is_One_Of
843 N1, N2, N3 : Name_Id)
845 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
848 Check_Arg_Is_Identifier (Argx);
850 if Chars (Argx) /= N1
851 and then Chars (Argx) /= N2
852 and then Chars (Argx) /= N3
854 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
856 end Check_Arg_Is_One_Of;
858 ---------------------------------
859 -- Check_Arg_Is_Queuing_Policy --
860 ---------------------------------
862 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
863 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
866 Check_Arg_Is_Identifier (Argx);
868 if not Is_Queuing_Policy_Name (Chars (Argx)) then
870 ("& is not a valid queuing policy name", Argx);
872 end Check_Arg_Is_Queuing_Policy;
874 ------------------------------------
875 -- Check_Arg_Is_Static_Expression --
876 ------------------------------------
878 procedure Check_Arg_Is_Static_Expression
882 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
885 Analyze_And_Resolve (Argx, Typ);
887 if Is_OK_Static_Expression (Argx) then
890 elsif Etype (Argx) = Any_Type then
893 -- An interesting special case, if we have a string literal and
894 -- we are in Ada 83 mode, then we allow it even though it will
895 -- not be flagged as static. This allows the use of Ada 95
896 -- pragmas like Import in Ada 83 mode. They will of course be
897 -- flagged with warnings as usual, but will not cause errors.
899 elsif Ada_Version = Ada_83
900 and then Nkind (Argx) = N_String_Literal
904 -- Static expression that raises Constraint_Error. This has
905 -- already been flagged, so just exit from pragma processing.
907 elsif Is_Static_Expression (Argx) then
910 -- Finally, we have a real error
913 Error_Msg_Name_1 := Chars (N);
915 ("argument for pragma% must be a static expression!", Argx);
918 end Check_Arg_Is_Static_Expression;
920 ---------------------------------
921 -- Check_Arg_Is_String_Literal --
922 ---------------------------------
924 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
925 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
927 if Nkind (Argx) /= N_String_Literal then
929 ("argument for pragma% must be string literal", Argx);
931 end Check_Arg_Is_String_Literal;
933 ------------------------------------------
934 -- Check_Arg_Is_Task_Dispatching_Policy --
935 ------------------------------------------
937 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
938 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
941 Check_Arg_Is_Identifier (Argx);
943 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
945 ("& is not a valid task dispatching policy name", Argx);
947 end Check_Arg_Is_Task_Dispatching_Policy;
949 ---------------------
950 -- Check_Arg_Order --
951 ---------------------
953 procedure Check_Arg_Order (Names : Name_List) is
956 Highest_So_Far : Natural := 0;
957 -- Highest index in Names seen do far
961 for J in 1 .. Arg_Count loop
962 if Chars (Arg) /= No_Name then
963 for K in Names'Range loop
964 if Chars (Arg) = Names (K) then
965 if K < Highest_So_Far then
966 Error_Msg_Name_1 := Chars (N);
968 ("parameters out of order for pragma%", Arg);
969 Error_Msg_Name_1 := Names (K);
970 Error_Msg_Name_2 := Names (Highest_So_Far);
971 Error_Msg_N ("\% must appear before %", Arg);
985 --------------------------------
986 -- Check_At_Least_N_Arguments --
987 --------------------------------
989 procedure Check_At_Least_N_Arguments (N : Nat) is
991 if Arg_Count < N then
992 Error_Pragma ("too few arguments for pragma%");
994 end Check_At_Least_N_Arguments;
996 -------------------------------
997 -- Check_At_Most_N_Arguments --
998 -------------------------------
1000 procedure Check_At_Most_N_Arguments (N : Nat) is
1003 if Arg_Count > N then
1005 for J in 1 .. N loop
1007 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
1010 end Check_At_Most_N_Arguments;
1012 ---------------------
1013 -- Check_Component --
1014 ---------------------
1016 procedure Check_Component (Comp : Node_Id) is
1018 if Nkind (Comp) = N_Component_Declaration then
1020 Sindic : constant Node_Id :=
1021 Subtype_Indication (Component_Definition (Comp));
1022 Typ : constant Entity_Id :=
1023 Etype (Defining_Identifier (Comp));
1025 if Nkind (Sindic) = N_Subtype_Indication then
1027 -- Ada 2005 (AI-216): If a component subtype is subject to
1028 -- a per-object constraint, then the component type shall
1029 -- be an Unchecked_Union.
1031 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
1033 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
1035 Error_Msg_N ("component subtype subject to per-object" &
1036 " constraint must be an Unchecked_Union", Comp);
1040 if Is_Controlled (Typ) then
1042 ("component of unchecked union cannot be controlled", Comp);
1044 elsif Has_Task (Typ) then
1046 ("component of unchecked union cannot have tasks", Comp);
1050 end Check_Component;
1052 ----------------------------------
1053 -- Check_Duplicated_Export_Name --
1054 ----------------------------------
1056 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
1057 String_Val : constant String_Id := Strval (Nam);
1060 -- We are only interested in the export case, and in the case of
1061 -- generics, it is the instance, not the template, that is the
1062 -- problem (the template will generate a warning in any case).
1064 if not Inside_A_Generic
1065 and then (Prag_Id = Pragma_Export
1067 Prag_Id = Pragma_Export_Procedure
1069 Prag_Id = Pragma_Export_Valued_Procedure
1071 Prag_Id = Pragma_Export_Function)
1073 for J in Externals.First .. Externals.Last loop
1074 if String_Equal (String_Val, Strval (Externals.Table (J))) then
1075 Error_Msg_Sloc := Sloc (Externals.Table (J));
1076 Error_Msg_N ("external name duplicates name given#", Nam);
1081 Externals.Append (Nam);
1083 end Check_Duplicated_Export_Name;
1085 -------------------------
1086 -- Check_First_Subtype --
1087 -------------------------
1089 procedure Check_First_Subtype (Arg : Node_Id) is
1090 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1092 if not Is_First_Subtype (Entity (Argx)) then
1094 ("pragma% cannot apply to subtype", Argx);
1096 end Check_First_Subtype;
1098 ---------------------------
1099 -- Check_In_Main_Program --
1100 ---------------------------
1102 procedure Check_In_Main_Program is
1103 P : constant Node_Id := Parent (N);
1106 -- Must be at in subprogram body
1108 if Nkind (P) /= N_Subprogram_Body then
1109 Error_Pragma ("% pragma allowed only in subprogram");
1111 -- Otherwise warn if obviously not main program
1113 elsif Present (Parameter_Specifications (Specification (P)))
1114 or else not Is_Compilation_Unit (Defining_Entity (P))
1116 Error_Msg_Name_1 := Chars (N);
1118 ("?pragma% is only effective in main program", N);
1120 end Check_In_Main_Program;
1122 ---------------------------------------
1123 -- Check_Interrupt_Or_Attach_Handler --
1124 ---------------------------------------
1126 procedure Check_Interrupt_Or_Attach_Handler is
1127 Arg1_X : constant Node_Id := Expression (Arg1);
1128 Handler_Proc, Proc_Scope : Entity_Id;
1133 if Prag_Id = Pragma_Interrupt_Handler then
1134 Check_Restriction (No_Dynamic_Attachment, N);
1137 Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
1138 Proc_Scope := Scope (Handler_Proc);
1140 -- On AAMP only, a pragma Interrupt_Handler is supported for
1141 -- nonprotected parameterless procedures.
1143 if not AAMP_On_Target
1144 or else Prag_Id = Pragma_Attach_Handler
1146 if Ekind (Proc_Scope) /= E_Protected_Type then
1148 ("argument of pragma% must be protected procedure", Arg1);
1151 if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
1152 Error_Pragma ("pragma% must be in protected definition");
1156 if not Is_Library_Level_Entity (Proc_Scope)
1157 or else (AAMP_On_Target
1158 and then not Is_Library_Level_Entity (Handler_Proc))
1161 ("argument for pragma% must be library level entity", Arg1);
1163 end Check_Interrupt_Or_Attach_Handler;
1165 -------------------------------------------
1166 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1167 -------------------------------------------
1169 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1178 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1181 elsif Nkind (P) = N_Package_Specification then
1184 elsif Nkind (P) = N_Block_Statement then
1187 -- Note: the following tests seem a little peculiar, because
1188 -- they test for bodies, but if we were in the statement part
1189 -- of the body, we would already have hit the handled statement
1190 -- sequence, so the only way we get here is by being in the
1191 -- declarative part of the body.
1193 elsif Nkind (P) = N_Subprogram_Body
1194 or else Nkind (P) = N_Package_Body
1195 or else Nkind (P) = N_Task_Body
1196 or else Nkind (P) = N_Entry_Body
1204 Error_Pragma ("pragma% is not in declarative part or package spec");
1205 end Check_Is_In_Decl_Part_Or_Package_Spec;
1207 -------------------------
1208 -- Check_No_Identifier --
1209 -------------------------
1211 procedure Check_No_Identifier (Arg : Node_Id) is
1213 if Chars (Arg) /= No_Name then
1214 Error_Pragma_Arg_Ident
1215 ("pragma% does not permit identifier& here", Arg);
1217 end Check_No_Identifier;
1219 --------------------------
1220 -- Check_No_Identifiers --
1221 --------------------------
1223 procedure Check_No_Identifiers is
1226 if Arg_Count > 0 then
1228 while Present (Arg_Node) loop
1229 Check_No_Identifier (Arg_Node);
1233 end Check_No_Identifiers;
1235 -------------------------------
1236 -- Check_Optional_Identifier --
1237 -------------------------------
1239 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1241 if Present (Arg) and then Chars (Arg) /= No_Name then
1242 if Chars (Arg) /= Id then
1243 Error_Msg_Name_1 := Chars (N);
1244 Error_Msg_Name_2 := Id;
1245 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1249 end Check_Optional_Identifier;
1251 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1253 Name_Buffer (1 .. Id'Length) := Id;
1254 Name_Len := Id'Length;
1255 Check_Optional_Identifier (Arg, Name_Find);
1256 end Check_Optional_Identifier;
1258 -----------------------------
1259 -- Check_Static_Constraint --
1260 -----------------------------
1262 -- Note: for convenience in writing this procedure, in addition to
1263 -- the officially (i.e. by spec) allowed argument which is always
1264 -- a constraint, it also allows ranges and discriminant associations.
1265 -- Above is not clear ???
1267 procedure Check_Static_Constraint (Constr : Node_Id) is
1269 --------------------
1270 -- Require_Static --
1271 --------------------
1273 procedure Require_Static (E : Node_Id);
1274 -- Require given expression to be static expression
1276 procedure Require_Static (E : Node_Id) is
1278 if not Is_OK_Static_Expression (E) then
1279 Flag_Non_Static_Expr
1280 ("non-static constraint not allowed in Unchecked_Union!", E);
1285 -- Start of processing for Check_Static_Constraint
1288 case Nkind (Constr) is
1289 when N_Discriminant_Association =>
1290 Require_Static (Expression (Constr));
1293 Require_Static (Low_Bound (Constr));
1294 Require_Static (High_Bound (Constr));
1296 when N_Attribute_Reference =>
1297 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1298 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1300 when N_Range_Constraint =>
1301 Check_Static_Constraint (Range_Expression (Constr));
1303 when N_Index_Or_Discriminant_Constraint =>
1307 IDC := First (Constraints (Constr));
1308 while Present (IDC) loop
1309 Check_Static_Constraint (IDC);
1317 end Check_Static_Constraint;
1319 --------------------------------------
1320 -- Check_Valid_Configuration_Pragma --
1321 --------------------------------------
1323 -- A configuration pragma must appear in the context clause of
1324 -- a compilation unit, at the start of the list (i.e. only other
1325 -- pragmas may precede it).
1327 procedure Check_Valid_Configuration_Pragma is
1329 if not Is_Configuration_Pragma then
1330 Error_Pragma ("incorrect placement for configuration pragma%");
1332 end Check_Valid_Configuration_Pragma;
1334 -------------------------------------
1335 -- Check_Valid_Library_Unit_Pragma --
1336 -------------------------------------
1338 procedure Check_Valid_Library_Unit_Pragma is
1340 Parent_Node : Node_Id;
1341 Unit_Name : Entity_Id;
1342 Unit_Kind : Node_Kind;
1343 Unit_Node : Node_Id;
1344 Sindex : Source_File_Index;
1347 if not Is_List_Member (N) then
1351 Plist := List_Containing (N);
1352 Parent_Node := Parent (Plist);
1354 if Parent_Node = Empty then
1357 -- Case of pragma appearing after a compilation unit. In this
1358 -- case it must have an argument with the corresponding name
1359 -- and must be part of the following pragmas of its parent.
1361 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1362 if Plist /= Pragmas_After (Parent_Node) then
1365 elsif Arg_Count = 0 then
1367 ("argument required if outside compilation unit");
1370 Check_No_Identifiers;
1371 Check_Arg_Count (1);
1372 Unit_Node := Unit (Parent (Parent_Node));
1373 Unit_Kind := Nkind (Unit_Node);
1375 Analyze (Expression (Arg1));
1377 if Unit_Kind = N_Generic_Subprogram_Declaration
1378 or else Unit_Kind = N_Subprogram_Declaration
1380 Unit_Name := Defining_Entity (Unit_Node);
1382 elsif Unit_Kind in N_Generic_Instantiation then
1383 Unit_Name := Defining_Entity (Unit_Node);
1386 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1389 if Chars (Unit_Name) /=
1390 Chars (Entity (Expression (Arg1)))
1393 ("pragma% argument is not current unit name", Arg1);
1396 if Ekind (Unit_Name) = E_Package
1397 and then Present (Renamed_Entity (Unit_Name))
1399 Error_Pragma ("pragma% not allowed for renamed package");
1403 -- Pragma appears other than after a compilation unit
1406 -- Here we check for the generic instantiation case and also
1407 -- for the case of processing a generic formal package. We
1408 -- detect these cases by noting that the Sloc on the node
1409 -- does not belong to the current compilation unit.
1411 Sindex := Source_Index (Current_Sem_Unit);
1413 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1414 Rewrite (N, Make_Null_Statement (Loc));
1417 -- If before first declaration, the pragma applies to the
1418 -- enclosing unit, and the name if present must be this name.
1420 elsif Is_Before_First_Decl (N, Plist) then
1421 Unit_Node := Unit_Declaration_Node (Current_Scope);
1422 Unit_Kind := Nkind (Unit_Node);
1424 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1427 elsif Unit_Kind = N_Subprogram_Body
1428 and then not Acts_As_Spec (Unit_Node)
1432 elsif Nkind (Parent_Node) = N_Package_Body then
1435 elsif Nkind (Parent_Node) = N_Package_Specification
1436 and then Plist = Private_Declarations (Parent_Node)
1440 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1441 or else Nkind (Parent_Node) =
1442 N_Generic_Subprogram_Declaration)
1443 and then Plist = Generic_Formal_Declarations (Parent_Node)
1447 elsif Arg_Count > 0 then
1448 Analyze (Expression (Arg1));
1450 if Entity (Expression (Arg1)) /= Current_Scope then
1452 ("name in pragma% must be enclosing unit", Arg1);
1455 -- It is legal to have no argument in this context
1461 -- Error if not before first declaration. This is because a
1462 -- library unit pragma argument must be the name of a library
1463 -- unit (RM 10.1.5(7)), but the only names permitted in this
1464 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1465 -- generic subprogram declarations or generic instantiations.
1469 ("pragma% misplaced, must be before first declaration");
1473 end Check_Valid_Library_Unit_Pragma;
1479 procedure Check_Variant (Variant : Node_Id) is
1480 Clist : constant Node_Id := Component_List (Variant);
1484 if not Is_Non_Empty_List (Component_Items (Clist)) then
1486 ("Unchecked_Union may not have empty component list",
1491 Comp := First (Component_Items (Clist));
1492 while Present (Comp) loop
1493 Check_Component (Comp);
1502 procedure Error_Pragma (Msg : String) is
1504 Error_Msg_Name_1 := Chars (N);
1505 Error_Msg_N (Msg, N);
1509 ----------------------
1510 -- Error_Pragma_Arg --
1511 ----------------------
1513 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1515 Error_Msg_Name_1 := Chars (N);
1516 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1518 end Error_Pragma_Arg;
1520 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1522 Error_Msg_Name_1 := Chars (N);
1523 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1524 Error_Pragma_Arg (Msg2, Arg);
1525 end Error_Pragma_Arg;
1527 ----------------------------
1528 -- Error_Pragma_Arg_Ident --
1529 ----------------------------
1531 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1533 Error_Msg_Name_1 := Chars (N);
1534 Error_Msg_N (Msg, Arg);
1536 end Error_Pragma_Arg_Ident;
1538 ------------------------
1539 -- Find_Lib_Unit_Name --
1540 ------------------------
1542 function Find_Lib_Unit_Name return Entity_Id is
1544 -- Return inner compilation unit entity, for case of nested
1545 -- categorization pragmas. This happens in generic unit.
1547 if Nkind (Parent (N)) = N_Package_Specification
1548 and then Defining_Entity (Parent (N)) /= Current_Scope
1550 return Defining_Entity (Parent (N));
1552 return Current_Scope;
1554 end Find_Lib_Unit_Name;
1556 ----------------------------
1557 -- Find_Program_Unit_Name --
1558 ----------------------------
1560 procedure Find_Program_Unit_Name (Id : Node_Id) is
1561 Unit_Name : Entity_Id;
1562 Unit_Kind : Node_Kind;
1563 P : constant Node_Id := Parent (N);
1566 if Nkind (P) = N_Compilation_Unit then
1567 Unit_Kind := Nkind (Unit (P));
1569 if Unit_Kind = N_Subprogram_Declaration
1570 or else Unit_Kind = N_Package_Declaration
1571 or else Unit_Kind in N_Generic_Declaration
1573 Unit_Name := Defining_Entity (Unit (P));
1575 if Chars (Id) = Chars (Unit_Name) then
1576 Set_Entity (Id, Unit_Name);
1577 Set_Etype (Id, Etype (Unit_Name));
1579 Set_Etype (Id, Any_Type);
1581 ("cannot find program unit referenced by pragma%");
1585 Set_Etype (Id, Any_Type);
1586 Error_Pragma ("pragma% inapplicable to this unit");
1592 end Find_Program_Unit_Name;
1594 -----------------------------------------
1595 -- Find_Unique_Parameterless_Procedure --
1596 -----------------------------------------
1598 function Find_Unique_Parameterless_Procedure
1600 Arg : Node_Id) return Entity_Id
1602 Proc : Entity_Id := Empty;
1605 -- The body of this procedure needs some comments ???
1607 if not Is_Entity_Name (Name) then
1609 ("argument of pragma% must be entity name", Arg);
1611 elsif not Is_Overloaded (Name) then
1612 Proc := Entity (Name);
1614 if Ekind (Proc) /= E_Procedure
1615 or else Present (First_Formal (Proc)) then
1617 ("argument of pragma% must be parameterless procedure", Arg);
1622 Found : Boolean := False;
1624 Index : Interp_Index;
1627 Get_First_Interp (Name, Index, It);
1628 while Present (It.Nam) loop
1631 if Ekind (Proc) = E_Procedure
1632 and then No (First_Formal (Proc))
1636 Set_Entity (Name, Proc);
1637 Set_Is_Overloaded (Name, False);
1640 ("ambiguous handler name for pragma% ", Arg);
1644 Get_Next_Interp (Index, It);
1649 ("argument of pragma% must be parameterless procedure",
1652 Proc := Entity (Name);
1658 end Find_Unique_Parameterless_Procedure;
1660 -------------------------
1661 -- Gather_Associations --
1662 -------------------------
1664 procedure Gather_Associations
1666 Args : out Args_List)
1671 -- Initialize all parameters to Empty
1673 for J in Args'Range loop
1677 -- That's all we have to do if there are no argument associations
1679 if No (Pragma_Argument_Associations (N)) then
1683 -- Otherwise first deal with any positional parameters present
1685 Arg := First (Pragma_Argument_Associations (N));
1686 for Index in Args'Range loop
1687 exit when No (Arg) or else Chars (Arg) /= No_Name;
1688 Args (Index) := Expression (Arg);
1692 -- Positional parameters all processed, if any left, then we
1693 -- have too many positional parameters.
1695 if Present (Arg) and then Chars (Arg) = No_Name then
1697 ("too many positional associations for pragma%", Arg);
1700 -- Process named parameters if any are present
1702 while Present (Arg) loop
1703 if Chars (Arg) = No_Name then
1705 ("positional association cannot follow named association",
1709 for Index in Names'Range loop
1710 if Names (Index) = Chars (Arg) then
1711 if Present (Args (Index)) then
1713 ("duplicate argument association for pragma%", Arg);
1715 Args (Index) := Expression (Arg);
1720 if Index = Names'Last then
1721 Error_Msg_Name_1 := Chars (N);
1722 Error_Msg_N ("pragma% does not allow & argument", Arg);
1724 -- Check for possible misspelling
1726 for Index1 in Names'Range loop
1727 if Is_Bad_Spelling_Of
1728 (Get_Name_String (Chars (Arg)),
1729 Get_Name_String (Names (Index1)))
1731 Error_Msg_Name_1 := Names (Index1);
1732 Error_Msg_N ("\possible misspelling of%", Arg);
1744 end Gather_Associations;
1746 --------------------
1747 -- Get_Pragma_Arg --
1748 --------------------
1750 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
1752 if Nkind (Arg) = N_Pragma_Argument_Association then
1753 return Expression (Arg);
1763 procedure GNAT_Pragma is
1765 Check_Restriction (No_Implementation_Pragmas, N);
1768 --------------------------
1769 -- Is_Before_First_Decl --
1770 --------------------------
1772 function Is_Before_First_Decl
1773 (Pragma_Node : Node_Id;
1774 Decls : List_Id) return Boolean
1776 Item : Node_Id := First (Decls);
1779 -- Only other pragmas can come before this pragma
1782 if No (Item) or else Nkind (Item) /= N_Pragma then
1785 elsif Item = Pragma_Node then
1791 end Is_Before_First_Decl;
1793 -----------------------------
1794 -- Is_Configuration_Pragma --
1795 -----------------------------
1797 -- A configuration pragma must appear in the context clause of
1798 -- a compilation unit, at the start of the list (i.e. only other
1799 -- pragmas may precede it).
1801 function Is_Configuration_Pragma return Boolean is
1802 Lis : constant List_Id := List_Containing (N);
1803 Par : constant Node_Id := Parent (N);
1807 -- If no parent, then we are in the configuration pragma file,
1808 -- so the placement is definitely appropriate.
1813 -- Otherwise we must be in the context clause of a compilation unit
1814 -- and the only thing allowed before us in the context list is more
1815 -- configuration pragmas.
1817 elsif Nkind (Par) = N_Compilation_Unit
1818 and then Context_Items (Par) = Lis
1825 elsif Nkind (Prg) /= N_Pragma then
1835 end Is_Configuration_Pragma;
1837 --------------------------
1838 -- Is_In_Context_Clause --
1839 --------------------------
1841 function Is_In_Context_Clause return Boolean is
1843 Parent_Node : Node_Id;
1846 if not Is_List_Member (N) then
1850 Plist := List_Containing (N);
1851 Parent_Node := Parent (Plist);
1853 if Parent_Node = Empty
1854 or else Nkind (Parent_Node) /= N_Compilation_Unit
1855 or else Context_Items (Parent_Node) /= Plist
1862 end Is_In_Context_Clause;
1864 ---------------------------------
1865 -- Is_Static_String_Expression --
1866 ---------------------------------
1868 function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
1869 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1872 Analyze_And_Resolve (Argx);
1873 return Is_OK_Static_Expression (Argx)
1874 and then Nkind (Argx) = N_String_Literal;
1875 end Is_Static_String_Expression;
1877 ----------------------
1878 -- Pragma_Misplaced --
1879 ----------------------
1881 procedure Pragma_Misplaced is
1883 Error_Pragma ("incorrect placement of pragma%");
1884 end Pragma_Misplaced;
1886 ------------------------------------
1887 -- Process Atomic_Shared_Volatile --
1888 ------------------------------------
1890 procedure Process_Atomic_Shared_Volatile is
1897 procedure Set_Atomic (E : Entity_Id);
1898 -- Set given type as atomic, and if no explicit alignment was
1899 -- given, set alignment to unknown, since back end knows what
1900 -- the alignment requirements are for atomic arrays. Note that
1901 -- this step is necessary for derived types.
1907 procedure Set_Atomic (E : Entity_Id) is
1911 if not Has_Alignment_Clause (E) then
1912 Set_Alignment (E, Uint_0);
1916 -- Start of processing for Process_Atomic_Shared_Volatile
1919 Check_Ada_83_Warning;
1920 Check_No_Identifiers;
1921 Check_Arg_Count (1);
1922 Check_Arg_Is_Local_Name (Arg1);
1923 E_Id := Expression (Arg1);
1925 if Etype (E_Id) = Any_Type then
1930 D := Declaration_Node (E);
1934 if Rep_Item_Too_Early (E, N)
1936 Rep_Item_Too_Late (E, N)
1940 Check_First_Subtype (Arg1);
1943 if Prag_Id /= Pragma_Volatile then
1945 Set_Atomic (Underlying_Type (E));
1946 Set_Atomic (Base_Type (E));
1949 -- Attribute belongs on the base type. If the
1950 -- view of the type is currently private, it also
1951 -- belongs on the underlying type.
1953 Set_Is_Volatile (Base_Type (E));
1954 Set_Is_Volatile (Underlying_Type (E));
1956 Set_Treat_As_Volatile (E);
1957 Set_Treat_As_Volatile (Underlying_Type (E));
1959 elsif K = N_Object_Declaration
1960 or else (K = N_Component_Declaration
1961 and then Original_Record_Component (E) = E)
1963 if Rep_Item_Too_Late (E, N) then
1967 if Prag_Id /= Pragma_Volatile then
1970 -- If the object declaration has an explicit
1971 -- initialization, a temporary may have to be
1972 -- created to hold the expression, to insure
1973 -- that access to the object remain atomic.
1975 if Nkind (Parent (E)) = N_Object_Declaration
1976 and then Present (Expression (Parent (E)))
1978 Set_Has_Delayed_Freeze (E);
1981 -- An interesting improvement here. If an object of type X
1982 -- is declared atomic, and the type X is not atomic, that's
1983 -- a pity, since it may not have appropraite alignment etc.
1984 -- We can rescue this in the special case where the object
1985 -- and type are in the same unit by just setting the type
1986 -- as atomic, so that the back end will process it as atomic.
1988 Utyp := Underlying_Type (Etype (E));
1991 and then Sloc (E) > No_Location
1992 and then Sloc (Utyp) > No_Location
1994 Get_Source_File_Index (Sloc (E)) =
1995 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
1997 Set_Is_Atomic (Underlying_Type (Etype (E)));
2001 Set_Is_Volatile (E);
2002 Set_Treat_As_Volatile (E);
2006 ("inappropriate entity for pragma%", Arg1);
2008 end Process_Atomic_Shared_Volatile;
2010 -------------------------------------------
2011 -- Process_Compile_Time_Warning_Or_Error --
2012 -------------------------------------------
2014 procedure Process_Compile_Time_Warning_Or_Error is
2015 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
2019 Check_Arg_Count (2);
2020 Check_No_Identifiers;
2021 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
2022 Analyze_And_Resolve (Arg1x, Standard_Boolean);
2024 if Compile_Time_Known_Value (Arg1x) then
2025 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
2027 Str : constant String_Id :=
2028 Strval (Get_Pragma_Arg (Arg2));
2029 Len : constant Int := String_Length (Str);
2039 -- Loop through segments of message separated by line
2040 -- feeds. We output these segments as separate messages
2041 -- with continuation marks for all but the first.
2044 Error_Msg_Strlen := 0;
2046 -- Loop to copy characters from argument to error
2047 -- message string buffer.
2050 exit when Ptr > Len;
2051 CC := Get_String_Char (Str, Ptr);
2054 -- Ignore wide chars ??? else store character
2056 if In_Character_Range (CC) then
2057 C := Get_Character (CC);
2058 exit when C = ASCII.LF;
2059 Error_Msg_Strlen := Error_Msg_Strlen + 1;
2060 Error_Msg_String (Error_Msg_Strlen) := C;
2064 -- Here with one line ready to go
2066 Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning;
2068 if Cont = False then
2069 Error_Msg_N ("<~", Arg1);
2072 Error_Msg_N ("\<~", Arg1);
2075 exit when Ptr > Len;
2080 end Process_Compile_Time_Warning_Or_Error;
2082 ------------------------
2083 -- Process_Convention --
2084 ------------------------
2086 procedure Process_Convention
2087 (C : out Convention_Id;
2093 Comp_Unit : Unit_Number_Type;
2095 procedure Set_Convention_From_Pragma (E : Entity_Id);
2096 -- Set convention in entity E, and also flag that the entity has a
2097 -- convention pragma. If entity is for a private or incomplete type,
2098 -- also set convention and flag on underlying type. This procedure
2099 -- also deals with the special case of C_Pass_By_Copy convention.
2101 --------------------------------
2102 -- Set_Convention_From_Pragma --
2103 --------------------------------
2105 procedure Set_Convention_From_Pragma (E : Entity_Id) is
2107 -- Ada 2005 (AI-430): Check invalid attempt to change convention
2108 -- for an overridden dispatching operation. Technically this is
2109 -- an amendment and should only be done in Ada 2005 mode. However,
2110 -- this is clearly a mistake, since the problem that is addressed
2111 -- by this AI is that there is a clear gap in the RM!
2113 if Is_Dispatching_Operation (E)
2114 and then Present (Overridden_Operation (E))
2115 and then C /= Convention (Overridden_Operation (E))
2118 ("cannot change convention for " &
2119 "overridden dispatching operation",
2123 -- Set the convention
2125 Set_Convention (E, C);
2126 Set_Has_Convention_Pragma (E);
2128 if Is_Incomplete_Or_Private_Type (E) then
2129 Set_Convention (Underlying_Type (E), C);
2130 Set_Has_Convention_Pragma (Underlying_Type (E), True);
2133 -- A class-wide type should inherit the convention of
2134 -- the specific root type (although this isn't specified
2135 -- clearly by the RM).
2137 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
2138 Set_Convention (Class_Wide_Type (E), C);
2141 -- If the entity is a record type, then check for special case of
2142 -- C_Pass_By_Copy, which is treated the same as C except that the
2143 -- special record flag is set. This convention is only permitted
2144 -- on record types (see AI95-00131).
2146 if Cname = Name_C_Pass_By_Copy then
2147 if Is_Record_Type (E) then
2148 Set_C_Pass_By_Copy (Base_Type (E));
2149 elsif Is_Incomplete_Or_Private_Type (E)
2150 and then Is_Record_Type (Underlying_Type (E))
2152 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
2155 ("C_Pass_By_Copy convention allowed only for record type",
2160 -- If the entity is a derived boolean type, check for the
2161 -- special case of convention C, C++, or Fortran, where we
2162 -- consider any nonzero value to represent true.
2164 if Is_Discrete_Type (E)
2165 and then Root_Type (Etype (E)) = Standard_Boolean
2171 C = Convention_Fortran)
2173 Set_Nonzero_Is_True (Base_Type (E));
2175 end Set_Convention_From_Pragma;
2177 -- Start of processing for Process_Convention
2180 Check_At_Least_N_Arguments (2);
2181 Check_Optional_Identifier (Arg1, Name_Convention);
2182 Check_Arg_Is_Identifier (Arg1);
2183 Cname := Chars (Expression (Arg1));
2185 -- C_Pass_By_Copy is treated as a synonym for convention C
2186 -- (this is tested again below to set the critical flag)
2188 if Cname = Name_C_Pass_By_Copy then
2191 -- Otherwise we must have something in the standard convention list
2193 elsif Is_Convention_Name (Cname) then
2194 C := Get_Convention_Id (Chars (Expression (Arg1)));
2196 -- In DEC VMS, it seems that there is an undocumented feature that
2197 -- any unrecognized convention is treated as the default, which for
2198 -- us is convention C. It does not seem so terrible to do this
2199 -- unconditionally, silently in the VMS case, and with a warning
2200 -- in the non-VMS case.
2203 if Warn_On_Export_Import and not OpenVMS_On_Target then
2205 ("?unrecognized convention name, C assumed",
2212 Check_Optional_Identifier (Arg2, Name_Entity);
2213 Check_Arg_Is_Local_Name (Arg2);
2215 Id := Expression (Arg2);
2218 if not Is_Entity_Name (Id) then
2219 Error_Pragma_Arg ("entity name required", Arg2);
2222 if Ekind (Entity (Id)) = E_Enumeration_Literal then
2223 Error_Pragma ("enumeration literal not allowed for pragma%");
2228 -- Go to renamed subprogram if present, since convention applies to
2229 -- the actual renamed entity, not to the renaming entity. If the
2230 -- subprogram is inherited, go to parent subprogram.
2232 if Is_Subprogram (E)
2233 and then Present (Alias (E))
2235 if Nkind (Parent (Declaration_Node (E))) =
2236 N_Subprogram_Renaming_Declaration
2240 elsif Nkind (Parent (E)) = N_Full_Type_Declaration
2241 and then Scope (E) = Scope (Alias (E))
2247 -- Check that we are not applying this to a specless body
2249 if Is_Subprogram (E)
2250 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2253 ("pragma% requires separate spec and must come before body");
2256 -- Check that we are not applying this to a named constant
2258 if Ekind (E) = E_Named_Integer
2260 Ekind (E) = E_Named_Real
2262 Error_Msg_Name_1 := Chars (N);
2264 ("cannot apply pragma% to named constant!",
2265 Get_Pragma_Arg (Arg2));
2267 ("\supply appropriate type for&!", Arg2);
2270 if Etype (E) = Any_Type
2271 or else Rep_Item_Too_Early (E, N)
2275 E := Underlying_Type (E);
2278 if Rep_Item_Too_Late (E, N) then
2282 if Has_Convention_Pragma (E) then
2284 ("at most one Convention/Export/Import pragma is allowed", Arg2);
2286 elsif Convention (E) = Convention_Protected
2287 or else Ekind (Scope (E)) = E_Protected_Type
2290 ("a protected operation cannot be given a different convention",
2294 -- For Intrinsic, a subprogram is required
2296 if C = Convention_Intrinsic
2297 and then not Is_Subprogram (E)
2298 and then not Is_Generic_Subprogram (E)
2301 ("second argument of pragma% must be a subprogram", Arg2);
2304 -- For Stdcall, a subprogram, variable or subprogram type is required
2306 if C = Convention_Stdcall
2307 and then not Is_Subprogram (E)
2308 and then not Is_Generic_Subprogram (E)
2309 and then Ekind (E) /= E_Variable
2312 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2315 ("second argument of pragma% must be subprogram (type)",
2319 if not Is_Subprogram (E)
2320 and then not Is_Generic_Subprogram (E)
2322 Set_Convention_From_Pragma (E);
2326 Check_First_Subtype (Arg2);
2327 Set_Convention_From_Pragma (Base_Type (E));
2329 -- For subprograms, we must set the convention on the
2330 -- internally generated directly designated type as well.
2332 if Ekind (E) = E_Access_Subprogram_Type then
2333 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2337 -- For the subprogram case, set proper convention for all homonyms
2338 -- in same scope and the same declarative part, i.e. the same
2339 -- compilation unit.
2342 Comp_Unit := Get_Source_Unit (E);
2343 Set_Convention_From_Pragma (E);
2345 -- Treat a pragma Import as an implicit body, for GPS use
2347 if Prag_Id = Pragma_Import then
2348 Generate_Reference (E, Id, 'b');
2354 exit when No (E1) or else Scope (E1) /= Current_Scope;
2356 -- Note: below we are missing a check for Rep_Item_Too_Late.
2357 -- That is deliberate, we cannot chain the rep item on more
2358 -- than one Rep_Item chain, to be fixed later ???
2360 if Comes_From_Source (E1)
2361 and then Comp_Unit = Get_Source_Unit (E1)
2362 and then Nkind (Original_Node (Parent (E1))) /=
2363 N_Full_Type_Declaration
2365 Set_Convention_From_Pragma (E1);
2367 if Prag_Id = Pragma_Import then
2368 Generate_Reference (E, Id, 'b');
2373 end Process_Convention;
2375 -----------------------------------------------------
2376 -- Process_Extended_Import_Export_Exception_Pragma --
2377 -----------------------------------------------------
2379 procedure Process_Extended_Import_Export_Exception_Pragma
2380 (Arg_Internal : Node_Id;
2381 Arg_External : Node_Id;
2391 if not OpenVMS_On_Target then
2393 ("?pragma% ignored (applies only to Open'V'M'S)");
2396 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2397 Def_Id := Entity (Arg_Internal);
2399 if Ekind (Def_Id) /= E_Exception then
2401 ("pragma% must refer to declared exception", Arg_Internal);
2404 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2406 if Present (Arg_Form) then
2407 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2410 if Present (Arg_Form)
2411 and then Chars (Arg_Form) = Name_Ada
2415 Set_Is_VMS_Exception (Def_Id);
2416 Set_Exception_Code (Def_Id, No_Uint);
2419 if Present (Arg_Code) then
2420 if not Is_VMS_Exception (Def_Id) then
2422 ("Code option for pragma% not allowed for Ada case",
2426 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2427 Code_Val := Expr_Value (Arg_Code);
2429 if not UI_Is_In_Int_Range (Code_Val) then
2431 ("Code option for pragma% must be in 32-bit range",
2435 Set_Exception_Code (Def_Id, Code_Val);
2438 end Process_Extended_Import_Export_Exception_Pragma;
2440 -------------------------------------------------
2441 -- Process_Extended_Import_Export_Internal_Arg --
2442 -------------------------------------------------
2444 procedure Process_Extended_Import_Export_Internal_Arg
2445 (Arg_Internal : Node_Id := Empty)
2450 if No (Arg_Internal) then
2451 Error_Pragma ("Internal parameter required for pragma%");
2454 if Nkind (Arg_Internal) = N_Identifier then
2457 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2458 and then (Prag_Id = Pragma_Import_Function
2460 Prag_Id = Pragma_Export_Function)
2466 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2469 Check_Arg_Is_Local_Name (Arg_Internal);
2470 end Process_Extended_Import_Export_Internal_Arg;
2472 --------------------------------------------------
2473 -- Process_Extended_Import_Export_Object_Pragma --
2474 --------------------------------------------------
2476 procedure Process_Extended_Import_Export_Object_Pragma
2477 (Arg_Internal : Node_Id;
2478 Arg_External : Node_Id;
2484 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2485 Def_Id := Entity (Arg_Internal);
2487 if Ekind (Def_Id) /= E_Constant
2488 and then Ekind (Def_Id) /= E_Variable
2491 ("pragma% must designate an object", Arg_Internal);
2494 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2496 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2499 ("previous Common/Psect_Object applies, pragma % not permitted",
2503 if Rep_Item_Too_Late (Def_Id, N) then
2507 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2509 if Present (Arg_Size) then
2510 Check_Arg_Is_External_Name (Arg_Size);
2513 -- Export_Object case
2515 if Prag_Id = Pragma_Export_Object then
2516 if not Is_Library_Level_Entity (Def_Id) then
2518 ("argument for pragma% must be library level entity",
2522 if Ekind (Current_Scope) = E_Generic_Package then
2523 Error_Pragma ("pragma& cannot appear in a generic unit");
2526 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2528 ("exported object must have compile time known size",
2532 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2534 ("?duplicate Export_Object pragma", N);
2536 Set_Exported (Def_Id, Arg_Internal);
2539 -- Import_Object case
2542 if Is_Concurrent_Type (Etype (Def_Id)) then
2544 ("cannot use pragma% for task/protected object",
2548 if Ekind (Def_Id) = E_Constant then
2550 ("cannot import a constant", Arg_Internal);
2553 if Warn_On_Export_Import
2554 and then Has_Discriminants (Etype (Def_Id))
2557 ("imported value must be initialized?", Arg_Internal);
2560 if Warn_On_Export_Import
2561 and then Is_Access_Type (Etype (Def_Id))
2564 ("cannot import object of an access type?", Arg_Internal);
2567 if Warn_On_Export_Import
2568 and then Is_Imported (Def_Id)
2571 ("?duplicate Import_Object pragma", N);
2573 -- Check for explicit initialization present. Note that an
2574 -- initialization that generated by the code generator, e.g.
2575 -- for an access type, does not count here.
2577 elsif Present (Expression (Parent (Def_Id)))
2580 (Original_Node (Expression (Parent (Def_Id))))
2582 Error_Msg_Sloc := Sloc (Def_Id);
2584 ("imported entities cannot be initialized (RM B.1(24))",
2585 "\no initialization allowed for & declared#", Arg1);
2587 Set_Imported (Def_Id);
2588 Note_Possible_Modification (Arg_Internal);
2591 end Process_Extended_Import_Export_Object_Pragma;
2593 ------------------------------------------------------
2594 -- Process_Extended_Import_Export_Subprogram_Pragma --
2595 ------------------------------------------------------
2597 procedure Process_Extended_Import_Export_Subprogram_Pragma
2598 (Arg_Internal : Node_Id;
2599 Arg_External : Node_Id;
2600 Arg_Parameter_Types : Node_Id;
2601 Arg_Result_Type : Node_Id := Empty;
2602 Arg_Mechanism : Node_Id;
2603 Arg_Result_Mechanism : Node_Id := Empty;
2604 Arg_First_Optional_Parameter : Node_Id := Empty)
2610 Ambiguous : Boolean;
2614 function Same_Base_Type
2616 Formal : Entity_Id) return Boolean;
2617 -- Determines if Ptype references the type of Formal. Note that
2618 -- only the base types need to match according to the spec. Ptype
2619 -- here is the argument from the pragma, which is either a type
2620 -- name, or an access attribute.
2622 --------------------
2623 -- Same_Base_Type --
2624 --------------------
2626 function Same_Base_Type
2628 Formal : Entity_Id) return Boolean
2630 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2634 -- Case where pragma argument is typ'Access
2636 if Nkind (Ptype) = N_Attribute_Reference
2637 and then Attribute_Name (Ptype) = Name_Access
2639 Pref := Prefix (Ptype);
2642 if not Is_Entity_Name (Pref)
2643 or else Entity (Pref) = Any_Type
2648 -- We have a match if the corresponding argument is of an
2649 -- anonymous access type, and its designicated type matches
2650 -- the type of the prefix of the access attribute
2652 return Ekind (Ftyp) = E_Anonymous_Access_Type
2653 and then Base_Type (Entity (Pref)) =
2654 Base_Type (Etype (Designated_Type (Ftyp)));
2656 -- Case where pragma argument is a type name
2661 if not Is_Entity_Name (Ptype)
2662 or else Entity (Ptype) = Any_Type
2667 -- We have a match if the corresponding argument is of
2668 -- the type given in the pragma (comparing base types)
2670 return Base_Type (Entity (Ptype)) = Ftyp;
2674 -- Start of processing for
2675 -- Process_Extended_Import_Export_Subprogram_Pragma
2678 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2682 -- Loop through homonyms (overloadings) of the entity
2684 Hom_Id := Entity (Arg_Internal);
2685 while Present (Hom_Id) loop
2686 Def_Id := Get_Base_Subprogram (Hom_Id);
2688 -- We need a subprogram in the current scope
2690 if not Is_Subprogram (Def_Id)
2691 or else Scope (Def_Id) /= Current_Scope
2698 -- Pragma cannot apply to subprogram body
2700 if Is_Subprogram (Def_Id)
2703 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2706 ("pragma% requires separate spec"
2707 & " and must come before body");
2710 -- Test result type if given, note that the result type
2711 -- parameter can only be present for the function cases.
2713 if Present (Arg_Result_Type)
2714 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2718 elsif Etype (Def_Id) /= Standard_Void_Type
2720 (Chars (N) = Name_Export_Procedure
2721 or else Chars (N) = Name_Import_Procedure)
2725 -- Test parameter types if given. Note that this parameter
2726 -- has not been analyzed (and must not be, since it is
2727 -- semantic nonsense), so we get it as the parser left it.
2729 elsif Present (Arg_Parameter_Types) then
2730 Check_Matching_Types : declare
2735 Formal := First_Formal (Def_Id);
2737 if Nkind (Arg_Parameter_Types) = N_Null then
2738 if Present (Formal) then
2742 -- A list of one type, e.g. (List) is parsed as
2743 -- a parenthesized expression.
2745 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2746 and then Paren_Count (Arg_Parameter_Types) = 1
2749 or else Present (Next_Formal (Formal))
2754 Same_Base_Type (Arg_Parameter_Types, Formal);
2757 -- A list of more than one type is parsed as a aggregate
2759 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2760 and then Paren_Count (Arg_Parameter_Types) = 0
2762 Ptype := First (Expressions (Arg_Parameter_Types));
2763 while Present (Ptype) or else Present (Formal) loop
2766 or else not Same_Base_Type (Ptype, Formal)
2771 Next_Formal (Formal);
2776 -- Anything else is of the wrong form
2780 ("wrong form for Parameter_Types parameter",
2781 Arg_Parameter_Types);
2783 end Check_Matching_Types;
2786 -- Match is now False if the entry we found did not match
2787 -- either a supplied Parameter_Types or Result_Types argument
2793 -- Ambiguous case, the flag Ambiguous shows if we already
2794 -- detected this and output the initial messages.
2797 if not Ambiguous then
2799 Error_Msg_Name_1 := Chars (N);
2801 ("pragma% does not uniquely identify subprogram!",
2803 Error_Msg_Sloc := Sloc (Ent);
2804 Error_Msg_N ("matching subprogram #!", N);
2808 Error_Msg_Sloc := Sloc (Def_Id);
2809 Error_Msg_N ("matching subprogram #!", N);
2814 Hom_Id := Homonym (Hom_Id);
2817 -- See if we found an entry
2820 if not Ambiguous then
2821 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
2823 ("pragma% cannot be given for generic subprogram");
2827 ("pragma% does not identify local subprogram");
2834 -- Import pragmas must be be for imported entities
2836 if Prag_Id = Pragma_Import_Function
2838 Prag_Id = Pragma_Import_Procedure
2840 Prag_Id = Pragma_Import_Valued_Procedure
2842 if not Is_Imported (Ent) then
2844 ("pragma Import or Interface must precede pragma%");
2847 -- Here we have the Export case which can set the entity as exported
2849 -- But does not do so if the specified external name is null, since
2850 -- that is taken as a signal in DEC Ada 83 (with which we want to be
2851 -- compatible) to request no external name.
2853 elsif Nkind (Arg_External) = N_String_Literal
2854 and then String_Length (Strval (Arg_External)) = 0
2858 -- In all other cases, set entit as exported
2861 Set_Exported (Ent, Arg_Internal);
2864 -- Special processing for Valued_Procedure cases
2866 if Prag_Id = Pragma_Import_Valued_Procedure
2868 Prag_Id = Pragma_Export_Valued_Procedure
2870 Formal := First_Formal (Ent);
2874 ("at least one parameter required for pragma%");
2876 elsif Ekind (Formal) /= E_Out_Parameter then
2878 ("first parameter must have mode out for pragma%");
2881 Set_Is_Valued_Procedure (Ent);
2885 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
2887 -- Process Result_Mechanism argument if present. We have already
2888 -- checked that this is only allowed for the function case.
2890 if Present (Arg_Result_Mechanism) then
2891 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
2894 -- Process Mechanism parameter if present. Note that this parameter
2895 -- is not analyzed, and must not be analyzed since it is semantic
2896 -- nonsense, so we get it in exactly as the parser left it.
2898 if Present (Arg_Mechanism) then
2906 -- A single mechanism association without a formal parameter
2907 -- name is parsed as a parenthesized expression. All other
2908 -- cases are parsed as aggregates, so we rewrite the single
2909 -- parameter case as an aggregate for consistency.
2911 if Nkind (Arg_Mechanism) /= N_Aggregate
2912 and then Paren_Count (Arg_Mechanism) = 1
2914 Rewrite (Arg_Mechanism,
2915 Make_Aggregate (Sloc (Arg_Mechanism),
2916 Expressions => New_List (
2917 Relocate_Node (Arg_Mechanism))));
2920 -- Case of only mechanism name given, applies to all formals
2922 if Nkind (Arg_Mechanism) /= N_Aggregate then
2923 Formal := First_Formal (Ent);
2924 while Present (Formal) loop
2925 Set_Mechanism_Value (Formal, Arg_Mechanism);
2926 Next_Formal (Formal);
2929 -- Case of list of mechanism associations given
2932 if Null_Record_Present (Arg_Mechanism) then
2934 ("inappropriate form for Mechanism parameter",
2938 -- Deal with positional ones first
2940 Formal := First_Formal (Ent);
2942 if Present (Expressions (Arg_Mechanism)) then
2943 Mname := First (Expressions (Arg_Mechanism));
2944 while Present (Mname) loop
2947 ("too many mechanism associations", Mname);
2950 Set_Mechanism_Value (Formal, Mname);
2951 Next_Formal (Formal);
2956 -- Deal with named entries
2958 if Present (Component_Associations (Arg_Mechanism)) then
2959 Massoc := First (Component_Associations (Arg_Mechanism));
2960 while Present (Massoc) loop
2961 Choice := First (Choices (Massoc));
2963 if Nkind (Choice) /= N_Identifier
2964 or else Present (Next (Choice))
2967 ("incorrect form for mechanism association",
2971 Formal := First_Formal (Ent);
2975 ("parameter name & not present", Choice);
2978 if Chars (Choice) = Chars (Formal) then
2980 (Formal, Expression (Massoc));
2984 Next_Formal (Formal);
2994 -- Process First_Optional_Parameter argument if present. We have
2995 -- already checked that this is only allowed for the Import case.
2997 if Present (Arg_First_Optional_Parameter) then
2998 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
3000 ("first optional parameter must be formal parameter name",
3001 Arg_First_Optional_Parameter);
3004 Formal := First_Formal (Ent);
3008 ("specified formal parameter& not found",
3009 Arg_First_Optional_Parameter);
3012 exit when Chars (Formal) =
3013 Chars (Arg_First_Optional_Parameter);
3015 Next_Formal (Formal);
3018 Set_First_Optional_Parameter (Ent, Formal);
3020 -- Check specified and all remaining formals have right form
3022 while Present (Formal) loop
3023 if Ekind (Formal) /= E_In_Parameter then
3025 ("optional formal& is not of mode in!",
3026 Arg_First_Optional_Parameter, Formal);
3029 Dval := Default_Value (Formal);
3033 ("optional formal& does not have default value!",
3034 Arg_First_Optional_Parameter, Formal);
3036 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
3041 ("default value for optional formal& is non-static!",
3042 Arg_First_Optional_Parameter, Formal);
3046 Set_Is_Optional_Parameter (Formal);
3047 Next_Formal (Formal);
3050 end Process_Extended_Import_Export_Subprogram_Pragma;
3052 --------------------------
3053 -- Process_Generic_List --
3054 --------------------------
3056 procedure Process_Generic_List is
3062 Check_No_Identifiers;
3063 Check_At_Least_N_Arguments (1);
3066 while Present (Arg) loop
3067 Exp := Expression (Arg);
3070 if not Is_Entity_Name (Exp)
3072 (not Is_Generic_Instance (Entity (Exp))
3074 not Is_Generic_Unit (Entity (Exp)))
3077 ("pragma% argument must be name of generic unit/instance",
3083 end Process_Generic_List;
3085 ---------------------------------
3086 -- Process_Import_Or_Interface --
3087 ---------------------------------
3089 procedure Process_Import_Or_Interface is
3095 Process_Convention (C, Def_Id);
3096 Kill_Size_Check_Code (Def_Id);
3097 Note_Possible_Modification (Expression (Arg2));
3099 if Ekind (Def_Id) = E_Variable
3101 Ekind (Def_Id) = E_Constant
3103 -- We do not permit Import to apply to a renaming declaration
3105 if Present (Renamed_Object (Def_Id)) then
3107 ("pragma% not allowed for object renaming", Arg2);
3109 -- User initialization is not allowed for imported object, but
3110 -- the object declaration may contain a default initialization,
3111 -- that will be discarded. Note that an explicit initialization
3112 -- only counts if it comes from source, otherwise it is simply
3113 -- the code generator making an implicit initialization explicit.
3115 elsif Present (Expression (Parent (Def_Id)))
3116 and then Comes_From_Source (Expression (Parent (Def_Id)))
3118 Error_Msg_Sloc := Sloc (Def_Id);
3120 ("no initialization allowed for declaration of& #",
3121 "\imported entities cannot be initialized (RM B.1(24))",
3125 Set_Imported (Def_Id);
3126 Process_Interface_Name (Def_Id, Arg3, Arg4);
3128 -- Note that we do not set Is_Public here. That's because we
3129 -- only want to set if if there is no address clause, and we
3130 -- don't know that yet, so we delay that processing till
3133 -- pragma Import completes deferred constants
3135 if Ekind (Def_Id) = E_Constant then
3136 Set_Has_Completion (Def_Id);
3139 -- It is not possible to import a constant of an unconstrained
3140 -- array type (e.g. string) because there is no simple way to
3141 -- write a meaningful subtype for it.
3143 if Is_Array_Type (Etype (Def_Id))
3144 and then not Is_Constrained (Etype (Def_Id))
3147 ("imported constant& must have a constrained subtype",
3152 elsif Is_Subprogram (Def_Id)
3153 or else Is_Generic_Subprogram (Def_Id)
3155 -- If the name is overloaded, pragma applies to all of the
3156 -- denoted entities in the same declarative part.
3159 while Present (Hom_Id) loop
3160 Def_Id := Get_Base_Subprogram (Hom_Id);
3162 -- Ignore inherited subprograms because the pragma will
3163 -- apply to the parent operation, which is the one called.
3165 if Is_Overloadable (Def_Id)
3166 and then Present (Alias (Def_Id))
3170 -- If it is not a subprogram, it must be in an outer
3171 -- scope and pragma does not apply.
3173 elsif not Is_Subprogram (Def_Id)
3174 and then not Is_Generic_Subprogram (Def_Id)
3178 -- Verify that the homonym is in the same declarative
3179 -- part (not just the same scope).
3181 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
3182 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
3187 Set_Imported (Def_Id);
3189 -- Special processing for Convention_Intrinsic
3191 if C = Convention_Intrinsic then
3193 -- Link_Name argument not allowed for intrinsic
3196 and then Chars (Arg3) = Name_Link_Name
3201 if Present (Arg4) then
3203 ("Link_Name argument not allowed for " &
3208 Set_Is_Intrinsic_Subprogram (Def_Id);
3210 -- If no external name is present, then check that
3211 -- this is a valid intrinsic subprogram. If an external
3212 -- name is present, then this is handled by the back end.
3215 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
3219 -- All interfaced procedures need an external symbol
3220 -- created for them since they are always referenced
3221 -- from another object file.
3223 Set_Is_Public (Def_Id);
3225 -- Verify that the subprogram does not have a completion
3226 -- through a renaming declaration. For other completions
3227 -- the pragma appears as a too late representation.
3230 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3234 and then Nkind (Decl) = N_Subprogram_Declaration
3235 and then Present (Corresponding_Body (Decl))
3238 (Unit_Declaration_Node
3239 (Corresponding_Body (Decl))) =
3240 N_Subprogram_Renaming_Declaration
3242 Error_Msg_Sloc := Sloc (Def_Id);
3244 ("cannot import&, renaming already provided for " &
3245 "declaration #", N, Def_Id);
3249 Set_Has_Completion (Def_Id);
3250 Process_Interface_Name (Def_Id, Arg3, Arg4);
3253 if Is_Compilation_Unit (Hom_Id) then
3255 -- Its possible homonyms are not affected by the pragma.
3256 -- Such homonyms might be present in the context of other
3257 -- units being compiled.
3262 Hom_Id := Homonym (Hom_Id);
3266 -- When the convention is Java or CIL, we also allow Import to be
3267 -- given for packages, generic packages, exceptions, and record
3270 elsif (C = Convention_Java or else C = Convention_CIL)
3272 (Ekind (Def_Id) = E_Package
3273 or else Ekind (Def_Id) = E_Generic_Package
3274 or else Ekind (Def_Id) = E_Exception
3275 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3277 Set_Imported (Def_Id);
3278 Set_Is_Public (Def_Id);
3279 Process_Interface_Name (Def_Id, Arg3, Arg4);
3281 -- Import a CPP class
3283 elsif Is_Record_Type (Def_Id)
3284 and then C = Convention_CPP
3286 if not Is_Tagged_Type (Def_Id) then
3287 Error_Msg_Sloc := Sloc (Def_Id);
3288 Error_Pragma_Arg ("imported 'C'P'P type must be tagged", Arg2);
3291 -- Types treated as CPP classes are treated as limited, but we
3292 -- don't require them to be declared this way. A warning is
3293 -- issued to encourage the user to declare them as limited.
3294 -- This is not an error, for compatibility reasons, because
3295 -- these types have been supported this way for some time.
3297 if not Is_Limited_Type (Def_Id) then
3299 ("imported 'C'P'P type should be " &
3300 "explicitly declared limited?",
3301 Get_Pragma_Arg (Arg2));
3303 ("\type will be considered limited",
3304 Get_Pragma_Arg (Arg2));
3307 Set_Is_CPP_Class (Def_Id);
3308 Set_Is_Limited_Record (Def_Id);
3313 ("second argument of pragma% must be object or subprogram",
3317 -- If this pragma applies to a compilation unit, then the unit,
3318 -- which is a subprogram, does not require (or allow) a body.
3319 -- We also do not need to elaborate imported procedures.
3321 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3323 Cunit : constant Node_Id := Parent (Parent (N));
3325 Set_Body_Required (Cunit, False);
3328 end Process_Import_Or_Interface;
3330 --------------------
3331 -- Process_Inline --
3332 --------------------
3334 procedure Process_Inline (Active : Boolean) is
3340 Effective : Boolean := False;
3342 procedure Make_Inline (Subp : Entity_Id);
3343 -- Subp is the defining unit name of the subprogram
3344 -- declaration. Set the flag, as well as the flag in the
3345 -- corresponding body, if there is one present.
3347 procedure Set_Inline_Flags (Subp : Entity_Id);
3348 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp
3350 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3351 -- Returns True if it can be determined at this stage that inlining
3352 -- is not possible, for examle if the body is available and contains
3353 -- exception handlers, we prevent inlining, since otherwise we can
3354 -- get undefined symbols at link time. This function also emits a
3355 -- warning if front-end inlining is enabled and the pragma appears
3357 -- ??? is business with link symbols still valid, or does it relate
3358 -- to front end ZCX which is being phased out ???
3360 ---------------------------
3361 -- Inlining_Not_Possible --
3362 ---------------------------
3364 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3365 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3369 if Nkind (Decl) = N_Subprogram_Body then
3370 Stats := Handled_Statement_Sequence (Decl);
3371 return Present (Exception_Handlers (Stats))
3372 or else Present (At_End_Proc (Stats));
3374 elsif Nkind (Decl) = N_Subprogram_Declaration
3375 and then Present (Corresponding_Body (Decl))
3377 if Front_End_Inlining
3378 and then Analyzed (Corresponding_Body (Decl))
3380 Error_Msg_N ("pragma appears too late, ignored?", N);
3383 -- If the subprogram is a renaming as body, the body is
3384 -- just a call to the renamed subprogram, and inlining is
3385 -- trivially possible.
3388 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
3389 N_Subprogram_Renaming_Declaration
3395 Handled_Statement_Sequence
3396 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3399 Present (Exception_Handlers (Stats))
3400 or else Present (At_End_Proc (Stats));
3404 -- If body is not available, assume the best, the check is
3405 -- performed again when compiling enclosing package bodies.
3409 end Inlining_Not_Possible;
3415 procedure Make_Inline (Subp : Entity_Id) is
3416 Kind : constant Entity_Kind := Ekind (Subp);
3417 Inner_Subp : Entity_Id := Subp;
3420 if Etype (Subp) = Any_Type then
3423 -- If inlining is not possible, for now do not treat as an error
3425 elsif Inlining_Not_Possible (Subp) then
3429 -- Here we have a candidate for inlining, but we must exclude
3430 -- derived operations. Otherwise we will end up trying to
3431 -- inline a phantom declaration, and the result would be to
3432 -- drag in a body which has no direct inlining associated with
3433 -- it. That would not only be inefficient but would also result
3434 -- in the backend doing cross-unit inlining in cases where it
3435 -- was definitely inappropriate to do so.
3437 -- However, a simple Comes_From_Source test is insufficient,
3438 -- since we do want to allow inlining of generic instances,
3439 -- which also do not come from source. Predefined operators do
3440 -- not come from source but are not inlineable either.
3442 elsif not Comes_From_Source (Subp)
3443 and then not Is_Generic_Instance (Subp)
3444 and then Scope (Subp) /= Standard_Standard
3449 -- The referenced entity must either be the enclosing entity,
3450 -- or an entity declared within the current open scope.
3452 elsif Present (Scope (Subp))
3453 and then Scope (Subp) /= Current_Scope
3454 and then Subp /= Current_Scope
3457 ("argument of% must be entity in current scope", Assoc);
3461 -- Processing for procedure, operator or function.
3462 -- If subprogram is aliased (as for an instance) indicate
3463 -- that the renamed entity (if declared in the same unit)
3466 if Is_Subprogram (Subp) then
3467 while Present (Alias (Inner_Subp)) loop
3468 Inner_Subp := Alias (Inner_Subp);
3471 if In_Same_Source_Unit (Subp, Inner_Subp) then
3472 Set_Inline_Flags (Inner_Subp);
3474 Decl := Parent (Parent (Inner_Subp));
3476 if Nkind (Decl) = N_Subprogram_Declaration
3477 and then Present (Corresponding_Body (Decl))
3479 Set_Inline_Flags (Corresponding_Body (Decl));
3485 -- For a generic subprogram set flag as well, for use at
3486 -- the point of instantiation, to determine whether the
3487 -- body should be generated.
3489 elsif Is_Generic_Subprogram (Subp) then
3490 Set_Inline_Flags (Subp);
3493 -- Literals are by definition inlined
3495 elsif Kind = E_Enumeration_Literal then
3498 -- Anything else is an error
3502 ("expect subprogram name for pragma%", Assoc);
3506 ----------------------
3507 -- Set_Inline_Flags --
3508 ----------------------
3510 procedure Set_Inline_Flags (Subp : Entity_Id) is
3513 Set_Is_Inlined (Subp, True);
3516 if not Has_Pragma_Inline (Subp) then
3517 Set_Has_Pragma_Inline (Subp);
3518 Set_Next_Rep_Item (N, First_Rep_Item (Subp));
3519 Set_First_Rep_Item (Subp, N);
3522 end Set_Inline_Flags;
3524 -- Start of processing for Process_Inline
3527 Check_No_Identifiers;
3528 Check_At_Least_N_Arguments (1);
3531 Inline_Processing_Required := True;
3535 while Present (Assoc) loop
3536 Subp_Id := Expression (Assoc);
3540 if Is_Entity_Name (Subp_Id) then
3541 Subp := Entity (Subp_Id);
3543 if Subp = Any_Id then
3545 -- If previous error, avoid cascaded errors
3553 while Present (Homonym (Subp))
3554 and then Scope (Homonym (Subp)) = Current_Scope
3556 Make_Inline (Homonym (Subp));
3557 Subp := Homonym (Subp);
3564 ("inappropriate argument for pragma%", Assoc);
3567 and then Warn_On_Redundant_Constructs
3569 if Inlining_Not_Possible (Subp) then
3571 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
3574 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
3582 ----------------------------
3583 -- Process_Interface_Name --
3584 ----------------------------
3586 procedure Process_Interface_Name
3587 (Subprogram_Def : Entity_Id;
3593 String_Val : String_Id;
3595 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3596 -- SN is a string literal node for an interface name. This routine
3597 -- performs some minimal checks that the name is reasonable. In
3598 -- particular that no spaces or other obviously incorrect characters
3599 -- appear. This is only a warning, since any characters are allowed.
3601 ----------------------------------
3602 -- Check_Form_Of_Interface_Name --
3603 ----------------------------------
3605 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3606 S : constant String_Id := Strval (Expr_Value_S (SN));
3607 SL : constant Nat := String_Length (S);
3612 Error_Msg_N ("interface name cannot be null string", SN);
3615 for J in 1 .. SL loop
3616 C := Get_String_Char (S, J);
3618 if Warn_On_Export_Import
3620 (not In_Character_Range (C)
3621 or else (Get_Character (C) = ' '
3622 and then VM_Target /= CLI_Target)
3623 or else Get_Character (C) = ',')
3626 ("?interface name contains illegal character", SN);
3629 end Check_Form_Of_Interface_Name;
3631 -- Start of processing for Process_Interface_Name
3634 if No (Link_Arg) then
3635 if No (Ext_Arg) then
3636 if VM_Target = CLI_Target
3637 and then Ekind (Subprogram_Def) = E_Package
3638 and then Nkind (Parent (Subprogram_Def)) =
3639 N_Package_Specification
3640 and then Present (Generic_Parent (Parent (Subprogram_Def)))
3645 (Generic_Parent (Parent (Subprogram_Def))));
3650 elsif Chars (Ext_Arg) = Name_Link_Name then
3652 Link_Nam := Expression (Ext_Arg);
3655 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3656 Ext_Nam := Expression (Ext_Arg);
3661 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3662 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3663 Ext_Nam := Expression (Ext_Arg);
3664 Link_Nam := Expression (Link_Arg);
3667 -- Check expressions for external name and link name are static
3669 if Present (Ext_Nam) then
3670 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3671 Check_Form_Of_Interface_Name (Ext_Nam);
3673 -- Verify that the external name is not the name of a local
3674 -- entity, which would hide the imported one and lead to
3675 -- run-time surprises. The problem can only arise for entities
3676 -- declared in a package body (otherwise the external name is
3677 -- fully qualified and won't conflict).
3685 if Prag_Id = Pragma_Import then
3686 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3688 E := Entity_Id (Get_Name_Table_Info (Nam));
3690 if Nam /= Chars (Subprogram_Def)
3691 and then Present (E)
3692 and then not Is_Overloadable (E)
3693 and then Is_Immediately_Visible (E)
3694 and then not Is_Imported (E)
3695 and then Ekind (Scope (E)) = E_Package
3698 while Present (Par) loop
3699 if Nkind (Par) = N_Package_Body then
3700 Error_Msg_Sloc := Sloc (E);
3702 ("imported entity is hidden by & declared#",
3707 Par := Parent (Par);
3714 if Present (Link_Nam) then
3715 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3716 Check_Form_Of_Interface_Name (Link_Nam);
3719 -- If there is no link name, just set the external name
3721 if No (Link_Nam) then
3722 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
3724 -- For the Link_Name case, the given literal is preceded by an
3725 -- asterisk, which indicates to GCC that the given name should
3726 -- be taken literally, and in particular that no prepending of
3727 -- underlines should occur, even in systems where this is the
3733 if VM_Target = No_VM then
3734 Store_String_Char (Get_Char_Code ('*'));
3737 String_Val := Strval (Expr_Value_S (Link_Nam));
3738 Store_String_Chars (String_Val);
3740 Make_String_Literal (Sloc (Link_Nam),
3741 Strval => End_String);
3744 Set_Encoded_Interface_Name
3745 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3746 Check_Duplicated_Export_Name (Link_Nam);
3747 end Process_Interface_Name;
3749 -----------------------------------------
3750 -- Process_Interrupt_Or_Attach_Handler --
3751 -----------------------------------------
3753 procedure Process_Interrupt_Or_Attach_Handler is
3754 Arg1_X : constant Node_Id := Expression (Arg1);
3755 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3756 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3759 Set_Is_Interrupt_Handler (Handler_Proc);
3761 -- If the pragma is not associated with a handler procedure
3762 -- within a protected type, then it must be for a nonprotected
3763 -- procedure for the AAMP target, in which case we don't
3764 -- associate a representation item with the procedure's scope.
3766 if Ekind (Proc_Scope) = E_Protected_Type then
3767 if Prag_Id = Pragma_Interrupt_Handler
3769 Prag_Id = Pragma_Attach_Handler
3771 Record_Rep_Item (Proc_Scope, N);
3774 end Process_Interrupt_Or_Attach_Handler;
3776 --------------------------------------------------
3777 -- Process_Restrictions_Or_Restriction_Warnings --
3778 --------------------------------------------------
3780 -- Note: some of the simple identifier cases were handled in par-prag,
3781 -- but it is harmless (and more straightforward) to simply handle all
3782 -- cases here, even if it means we repeat a bit of work in some cases.
3784 procedure Process_Restrictions_Or_Restriction_Warnings
3788 R_Id : Restriction_Id;
3793 procedure Check_Unit_Name (N : Node_Id);
3794 -- Checks unit name parameter for No_Dependence. Returns if it has
3795 -- an appropriate form, otherwise raises pragma argument error.
3797 ---------------------
3798 -- Check_Unit_Name --
3799 ---------------------
3801 procedure Check_Unit_Name (N : Node_Id) is
3803 if Nkind (N) = N_Selected_Component then
3804 Check_Unit_Name (Prefix (N));
3805 Check_Unit_Name (Selector_Name (N));
3807 elsif Nkind (N) = N_Identifier then
3812 ("wrong form for unit name for No_Dependence", N);
3814 end Check_Unit_Name;
3816 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
3819 Check_Ada_83_Warning;
3820 Check_At_Least_N_Arguments (1);
3821 Check_Valid_Configuration_Pragma;
3824 while Present (Arg) loop
3826 Expr := Expression (Arg);
3828 -- Case of no restriction identifier present
3830 if Id = No_Name then
3831 if Nkind (Expr) /= N_Identifier then
3833 ("invalid form for restriction", Arg);
3838 (Process_Restriction_Synonyms (Expr));
3840 if R_Id not in All_Boolean_Restrictions then
3842 ("invalid restriction identifier", Arg);
3845 if Implementation_Restriction (R_Id) then
3847 (No_Implementation_Restrictions, Arg);
3850 -- If this is a warning, then set the warning unless we already
3851 -- have a real restriction active (we never want a warning to
3852 -- override a real restriction).
3855 if not Restriction_Active (R_Id) then
3856 Set_Restriction (R_Id, N);
3857 Restriction_Warnings (R_Id) := True;
3860 -- If real restriction case, then set it and make sure that the
3861 -- restriction warning flag is off, since a real restriction
3862 -- always overrides a warning.
3865 Set_Restriction (R_Id, N);
3866 Restriction_Warnings (R_Id) := False;
3869 -- A very special case that must be processed here: pragma
3870 -- Restrictions (No_Exceptions) turns off all run-time
3871 -- checking. This is a bit dubious in terms of the formal
3872 -- language definition, but it is what is intended by RM
3873 -- H.4(12). Restriction_Warnings never affects generated code
3874 -- so this is done only in the real restriction case.
3876 if R_Id = No_Exceptions and then not Warn then
3877 Scope_Suppress := (others => True);
3880 -- Case of No_Dependence => unit-name. Note that the parser
3881 -- already made the necessary entry in the No_Dependence table.
3883 elsif Id = Name_No_Dependence then
3884 Check_Unit_Name (Expr);
3886 -- All other cases of restriction identifier present
3889 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
3890 Analyze_And_Resolve (Expr, Any_Integer);
3892 if R_Id not in All_Parameter_Restrictions then
3894 ("invalid restriction parameter identifier", Arg);
3896 elsif not Is_OK_Static_Expression (Expr) then
3897 Flag_Non_Static_Expr
3898 ("value must be static expression!", Expr);
3901 elsif not Is_Integer_Type (Etype (Expr))
3902 or else Expr_Value (Expr) < 0
3905 ("value must be non-negative integer", Arg);
3908 -- Restriction pragma is active
3910 Val := Expr_Value (Expr);
3912 if not UI_Is_In_Int_Range (Val) then
3914 ("pragma ignored, value too large?", Arg);
3917 -- Warning case. If the real restriction is active, then we
3918 -- ignore the request, since warning never overrides a real
3919 -- restriction. Otherwise we set the proper warning. Note that
3920 -- this circuit sets the warning again if it is already set,
3921 -- which is what we want, since the constant may have changed.
3924 if not Restriction_Active (R_Id) then
3926 (R_Id, N, Integer (UI_To_Int (Val)));
3927 Restriction_Warnings (R_Id) := True;
3930 -- Real restriction case, set restriction and make sure warning
3931 -- flag is off since real restriction always overrides warning.
3934 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
3935 Restriction_Warnings (R_Id) := False;
3941 end Process_Restrictions_Or_Restriction_Warnings;
3943 ---------------------------------
3944 -- Process_Suppress_Unsuppress --
3945 ---------------------------------
3947 -- Note: this procedure makes entries in the check suppress data
3948 -- structures managed by Sem. See spec of package Sem for full
3949 -- details on how we handle recording of check suppression.
3951 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
3956 In_Package_Spec : constant Boolean :=
3957 (Ekind (Current_Scope) = E_Package
3959 Ekind (Current_Scope) = E_Generic_Package)
3960 and then not In_Package_Body (Current_Scope);
3962 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
3963 -- Used to suppress a single check on the given entity
3965 --------------------------------
3966 -- Suppress_Unsuppress_Echeck --
3967 --------------------------------
3969 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
3971 Set_Checks_May_Be_Suppressed (E);
3973 if In_Package_Spec then
3974 Push_Global_Suppress_Stack_Entry
3977 Suppress => Suppress_Case);
3980 Push_Local_Suppress_Stack_Entry
3983 Suppress => Suppress_Case);
3986 -- If this is a first subtype, and the base type is distinct,
3987 -- then also set the suppress flags on the base type.
3989 if Is_First_Subtype (E)
3990 and then Etype (E) /= E
3992 Suppress_Unsuppress_Echeck (Etype (E), C);
3994 end Suppress_Unsuppress_Echeck;
3996 -- Start of processing for Process_Suppress_Unsuppress
3999 -- Suppress/Unsuppress can appear as a configuration pragma,
4000 -- or in a declarative part or a package spec (RM 11.5(5))
4002 if not Is_Configuration_Pragma then
4003 Check_Is_In_Decl_Part_Or_Package_Spec;
4006 Check_At_Least_N_Arguments (1);
4007 Check_At_Most_N_Arguments (2);
4008 Check_No_Identifier (Arg1);
4009 Check_Arg_Is_Identifier (Arg1);
4011 C := Get_Check_Id (Chars (Expression (Arg1)));
4013 if C = No_Check_Id then
4015 ("argument of pragma% is not valid check name", Arg1);
4018 if not Suppress_Case
4019 and then (C = All_Checks or else C = Overflow_Check)
4021 Opt.Overflow_Checks_Unsuppressed := True;
4024 if Arg_Count = 1 then
4026 -- Make an entry in the local scope suppress table. This is the
4027 -- table that directly shows the current value of the scope
4028 -- suppress check for any check id value.
4030 if C = All_Checks then
4032 -- For All_Checks, we set all specific predefined checks with
4033 -- the exception of Elaboration_Check, which is handled
4034 -- specially because of not wanting All_Checks to have the
4035 -- effect of deactivating static elaboration order processing.
4037 for J in Scope_Suppress'Range loop
4038 if J /= Elaboration_Check then
4039 Scope_Suppress (J) := Suppress_Case;
4043 -- If not All_Checks, and predefined check, then set appropriate
4044 -- scope entry. Note that we will set Elaboration_Check if this
4045 -- is explicitly specified.
4047 elsif C in Predefined_Check_Id then
4048 Scope_Suppress (C) := Suppress_Case;
4051 -- Also make an entry in the Local_Entity_Suppress table
4053 Push_Local_Suppress_Stack_Entry
4056 Suppress => Suppress_Case);
4058 -- Case of two arguments present, where the check is suppressed for
4059 -- a specified entity (given as the second argument of the pragma)
4062 Check_Optional_Identifier (Arg2, Name_On);
4063 E_Id := Expression (Arg2);
4066 if not Is_Entity_Name (E_Id) then
4068 ("second argument of pragma% must be entity name", Arg2);
4077 -- Enforce RM 11.5(7) which requires that for a pragma that
4078 -- appears within a package spec, the named entity must be
4079 -- within the package spec. We allow the package name itself
4080 -- to be mentioned since that makes sense, although it is not
4081 -- strictly allowed by 11.5(7).
4084 and then E /= Current_Scope
4085 and then Scope (E) /= Current_Scope
4088 ("entity in pragma% is not in package spec (RM 11.5(7))",
4092 -- Loop through homonyms. As noted below, in the case of a package
4093 -- spec, only homonyms within the package spec are considered.
4096 Suppress_Unsuppress_Echeck (E, C);
4098 if Is_Generic_Instance (E)
4099 and then Is_Subprogram (E)
4100 and then Present (Alias (E))
4102 Suppress_Unsuppress_Echeck (Alias (E), C);
4105 -- Move to next homonym
4110 -- If we are within a package specification, the
4111 -- pragma only applies to homonyms in the same scope.
4113 exit when In_Package_Spec
4114 and then Scope (E) /= Current_Scope;
4117 end Process_Suppress_Unsuppress;
4123 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
4125 if Is_Imported (E) then
4127 ("cannot export entity& that was previously imported", Arg);
4129 elsif Present (Address_Clause (E)) then
4131 ("cannot export entity& that has an address clause", Arg);
4134 Set_Is_Exported (E);
4136 -- Generate a reference for entity explicitly, because the
4137 -- identifier may be overloaded and name resolution will not
4140 Generate_Reference (E, Arg);
4142 -- Deal with exporting non-library level entity
4144 if not Is_Library_Level_Entity (E) then
4146 -- Not allowed at all for subprograms
4148 if Is_Subprogram (E) then
4149 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
4151 -- Otherwise set public and statically allocated
4155 Set_Is_Statically_Allocated (E);
4157 -- Warn if the corresponding W flag is set and the pragma
4158 -- comes from source. The latter may not be true e.g. on
4159 -- VMS where we expand export pragmas for exception codes
4160 -- associated with imported or exported exceptions. We do
4161 -- not want to generate a warning for something that the
4162 -- user did not write.
4164 if Warn_On_Export_Import
4165 and then Comes_From_Source (Arg)
4168 ("?& has been made static as a result of Export", Arg, E);
4170 ("\this usage is non-standard and non-portable", Arg);
4175 if Warn_On_Export_Import and then Is_Type (E) then
4177 ("exporting a type has no effect?", Arg, E);
4180 if Warn_On_Export_Import and Inside_A_Generic then
4182 ("all instances of& will have the same external name?", Arg, E);
4186 ----------------------------------------------
4187 -- Set_Extended_Import_Export_External_Name --
4188 ----------------------------------------------
4190 procedure Set_Extended_Import_Export_External_Name
4191 (Internal_Ent : Entity_Id;
4192 Arg_External : Node_Id)
4194 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
4198 if No (Arg_External) then
4202 Check_Arg_Is_External_Name (Arg_External);
4204 if Nkind (Arg_External) = N_String_Literal then
4205 if String_Length (Strval (Arg_External)) = 0 then
4208 New_Name := Adjust_External_Name_Case (Arg_External);
4211 elsif Nkind (Arg_External) = N_Identifier then
4212 New_Name := Get_Default_External_Name (Arg_External);
4214 -- Check_Arg_Is_External_Name should let through only
4215 -- identifiers and string literals or static string
4216 -- expressions (which are folded to string literals).
4219 raise Program_Error;
4222 -- If we already have an external name set (by a prior normal
4223 -- Import or Export pragma), then the external names must match
4225 if Present (Interface_Name (Internal_Ent)) then
4226 Check_Matching_Internal_Names : declare
4227 S1 : constant String_Id := Strval (Old_Name);
4228 S2 : constant String_Id := Strval (New_Name);
4231 -- Called if names do not match
4237 procedure Mismatch is
4239 Error_Msg_Sloc := Sloc (Old_Name);
4241 ("external name does not match that given #",
4245 -- Start of processing for Check_Matching_Internal_Names
4248 if String_Length (S1) /= String_Length (S2) then
4252 for J in 1 .. String_Length (S1) loop
4253 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
4258 end Check_Matching_Internal_Names;
4260 -- Otherwise set the given name
4263 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
4264 Check_Duplicated_Export_Name (New_Name);
4266 end Set_Extended_Import_Export_External_Name;
4272 procedure Set_Imported (E : Entity_Id) is
4274 -- Error message if already imported or exported
4276 if Is_Exported (E) or else Is_Imported (E) then
4277 if Is_Exported (E) then
4278 Error_Msg_NE ("entity& was previously exported", N, E);
4280 Error_Msg_NE ("entity& was previously imported", N, E);
4283 Error_Msg_Name_1 := Chars (N);
4285 ("\(pragma% applies to all previous entities)", N);
4287 Error_Msg_Sloc := Sloc (E);
4288 Error_Msg_NE ("\import not allowed for& declared#", N, E);
4290 -- Here if not previously imported or exported, OK to import
4293 Set_Is_Imported (E);
4295 -- If the entity is an object that is not at the library
4296 -- level, then it is statically allocated. We do not worry
4297 -- about objects with address clauses in this context since
4298 -- they are not really imported in the linker sense.
4301 and then not Is_Library_Level_Entity (E)
4302 and then No (Address_Clause (E))
4304 Set_Is_Statically_Allocated (E);
4309 -------------------------
4310 -- Set_Mechanism_Value --
4311 -------------------------
4313 -- Note: the mechanism name has not been analyzed (and cannot indeed
4314 -- be analyzed, since it is semantic nonsense), so we get it in the
4315 -- exact form created by the parser.
4317 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
4321 procedure Bad_Class;
4322 -- Signal bad descriptor class name
4324 procedure Bad_Mechanism;
4325 -- Signal bad mechanism name
4331 procedure Bad_Class is
4333 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
4336 -------------------------
4337 -- Bad_Mechanism_Value --
4338 -------------------------
4340 procedure Bad_Mechanism is
4342 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
4345 -- Start of processing for Set_Mechanism_Value
4348 if Mechanism (Ent) /= Default_Mechanism then
4350 ("mechanism for & has already been set", Mech_Name, Ent);
4353 -- MECHANISM_NAME ::= value | reference | descriptor
4355 if Nkind (Mech_Name) = N_Identifier then
4356 if Chars (Mech_Name) = Name_Value then
4357 Set_Mechanism (Ent, By_Copy);
4360 elsif Chars (Mech_Name) = Name_Reference then
4361 Set_Mechanism (Ent, By_Reference);
4364 elsif Chars (Mech_Name) = Name_Descriptor then
4365 Check_VMS (Mech_Name);
4366 Set_Mechanism (Ent, By_Descriptor);
4369 elsif Chars (Mech_Name) = Name_Copy then
4371 ("bad mechanism name, Value assumed", Mech_Name);
4377 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
4378 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4380 -- Note: this form is parsed as an indexed component
4382 elsif Nkind (Mech_Name) = N_Indexed_Component then
4383 Class := First (Expressions (Mech_Name));
4385 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4386 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
4387 or else Present (Next (Class))
4392 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
4393 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4395 -- Note: this form is parsed as a function call
4397 elsif Nkind (Mech_Name) = N_Function_Call then
4399 Param := First (Parameter_Associations (Mech_Name));
4401 if Nkind (Name (Mech_Name)) /= N_Identifier
4402 or else Chars (Name (Mech_Name)) /= Name_Descriptor
4403 or else Present (Next (Param))
4404 or else No (Selector_Name (Param))
4405 or else Chars (Selector_Name (Param)) /= Name_Class
4409 Class := Explicit_Actual_Parameter (Param);
4416 -- Fall through here with Class set to descriptor class name
4418 Check_VMS (Mech_Name);
4420 if Nkind (Class) /= N_Identifier then
4423 elsif Chars (Class) = Name_UBS then
4424 Set_Mechanism (Ent, By_Descriptor_UBS);
4426 elsif Chars (Class) = Name_UBSB then
4427 Set_Mechanism (Ent, By_Descriptor_UBSB);
4429 elsif Chars (Class) = Name_UBA then
4430 Set_Mechanism (Ent, By_Descriptor_UBA);
4432 elsif Chars (Class) = Name_S then
4433 Set_Mechanism (Ent, By_Descriptor_S);
4435 elsif Chars (Class) = Name_SB then
4436 Set_Mechanism (Ent, By_Descriptor_SB);
4438 elsif Chars (Class) = Name_A then
4439 Set_Mechanism (Ent, By_Descriptor_A);
4441 elsif Chars (Class) = Name_NCA then
4442 Set_Mechanism (Ent, By_Descriptor_NCA);
4447 end Set_Mechanism_Value;
4449 ---------------------------
4450 -- Set_Ravenscar_Profile --
4451 ---------------------------
4453 -- The tasks to be done here are
4455 -- Set required policies
4457 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4458 -- pragma Locking_Policy (Ceiling_Locking)
4460 -- Set Detect_Blocking mode
4462 -- Set required restrictions (see System.Rident for detailed list)
4464 procedure Set_Ravenscar_Profile (N : Node_Id) is
4466 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4468 if Task_Dispatching_Policy /= ' '
4469 and then Task_Dispatching_Policy /= 'F'
4471 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
4472 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4474 -- Set the FIFO_Within_Priorities policy, but always preserve
4475 -- System_Location since we like the error message with the run time
4479 Task_Dispatching_Policy := 'F';
4481 if Task_Dispatching_Policy_Sloc /= System_Location then
4482 Task_Dispatching_Policy_Sloc := Loc;
4486 -- pragma Locking_Policy (Ceiling_Locking)
4488 if Locking_Policy /= ' '
4489 and then Locking_Policy /= 'C'
4491 Error_Msg_Sloc := Locking_Policy_Sloc;
4492 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4494 -- Set the Ceiling_Locking policy, but preserve System_Location since
4495 -- we like the error message with the run time name.
4498 Locking_Policy := 'C';
4500 if Locking_Policy_Sloc /= System_Location then
4501 Locking_Policy_Sloc := Loc;
4505 -- pragma Detect_Blocking
4507 Detect_Blocking := True;
4509 -- Set the corresponding restrictions
4511 Set_Profile_Restrictions (Ravenscar, N, Warn => False);
4512 end Set_Ravenscar_Profile;
4514 -- Start of processing for Analyze_Pragma
4517 -- Deal with unrecognized pragma
4519 if not Is_Pragma_Name (Chars (N)) then
4520 if Warn_On_Unrecognized_Pragma then
4521 Error_Msg_Name_1 := Chars (N);
4522 Error_Msg_N ("?unrecognized pragma%!", N);
4524 for PN in First_Pragma_Name .. Last_Pragma_Name loop
4525 if Is_Bad_Spelling_Of
4526 (Get_Name_String (Chars (N)),
4527 Get_Name_String (PN))
4529 Error_Msg_Name_1 := PN;
4530 Error_Msg_N ("\?possible misspelling of %!", N);
4539 -- Here to start processing for recognized pragma
4541 Prag_Id := Get_Pragma_Id (Chars (N));
4550 if Present (Pragma_Argument_Associations (N)) then
4551 Arg1 := First (Pragma_Argument_Associations (N));
4553 if Present (Arg1) then
4554 Arg2 := Next (Arg1);
4556 if Present (Arg2) then
4557 Arg3 := Next (Arg2);
4559 if Present (Arg3) then
4560 Arg4 := Next (Arg3);
4566 -- Count number of arguments
4573 while Present (Arg_Node) loop
4574 Arg_Count := Arg_Count + 1;
4579 -- An enumeration type defines the pragmas that are supported by the
4580 -- implementation. Get_Pragma_Id (in package Prag) transorms a name
4581 -- into the corresponding enumeration value for the following case.
4589 -- pragma Abort_Defer;
4591 when Pragma_Abort_Defer =>
4593 Check_Arg_Count (0);
4595 -- The only required semantic processing is to check the
4596 -- placement. This pragma must appear at the start of the
4597 -- statement sequence of a handled sequence of statements.
4599 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
4600 or else N /= First (Statements (Parent (N)))
4611 -- Note: this pragma also has some specific processing in Par.Prag
4612 -- because we want to set the Ada version mode during parsing.
4614 when Pragma_Ada_83 =>
4616 Check_Arg_Count (0);
4618 -- We really should check unconditionally for proper configuration
4619 -- pragma placement, since we really don't want mixed Ada modes
4620 -- within a single unit, and the GNAT reference manual has always
4621 -- said this was a configuration pragma, but we did not check and
4622 -- are hesitant to add the check now.
4624 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
4625 -- or Ada 95, so we must check if we are in Ada 2005 mode.
4627 if Ada_Version >= Ada_05 then
4628 Check_Valid_Configuration_Pragma;
4631 -- Now set Ada 83 mode
4633 Ada_Version := Ada_83;
4634 Ada_Version_Explicit := Ada_Version;
4642 -- Note: this pragma also has some specific processing in Par.Prag
4643 -- because we want to set the Ada 83 version mode during parsing.
4645 when Pragma_Ada_95 =>
4647 Check_Arg_Count (0);
4649 -- We really should check unconditionally for proper configuration
4650 -- pragma placement, since we really don't want mixed Ada modes
4651 -- within a single unit, and the GNAT reference manual has always
4652 -- said this was a configuration pragma, but we did not check and
4653 -- are hesitant to add the check now.
4655 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
4656 -- or Ada 95, so we must check if we are in Ada 2005 mode.
4658 if Ada_Version >= Ada_05 then
4659 Check_Valid_Configuration_Pragma;
4662 -- Now set Ada 95 mode
4664 Ada_Version := Ada_95;
4665 Ada_Version_Explicit := Ada_Version;
4667 ---------------------
4668 -- Ada_05/Ada_2005 --
4669 ---------------------
4672 -- pragma Ada_05 (LOCAL_NAME);
4675 -- pragma Ada_2005 (LOCAL_NAME):
4677 -- Note: these pragma also have some specific processing in Par.Prag
4678 -- because we want to set the Ada 2005 version mode during parsing.
4680 when Pragma_Ada_05 | Pragma_Ada_2005 => declare
4686 if Arg_Count = 1 then
4687 Check_Arg_Is_Local_Name (Arg1);
4688 E_Id := Expression (Arg1);
4690 if Etype (E_Id) = Any_Type then
4694 Set_Is_Ada_2005_Only (Entity (E_Id));
4697 Check_Arg_Count (0);
4699 -- For Ada_2005 we unconditionally enforce the documented
4700 -- configuration pragma placement, since we do not want to
4701 -- tolerate mixed modes in a unit involving Ada 2005. That
4702 -- would cause real difficulties for those cases where there
4703 -- are incompatibilities between Ada 95 and Ada 2005.
4705 Check_Valid_Configuration_Pragma;
4707 -- Now set Ada 2005 mode
4709 Ada_Version := Ada_05;
4710 Ada_Version_Explicit := Ada_05;
4714 ----------------------
4715 -- All_Calls_Remote --
4716 ----------------------
4718 -- pragma All_Calls_Remote [(library_package_NAME)];
4720 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
4721 Lib_Entity : Entity_Id;
4724 Check_Ada_83_Warning;
4725 Check_Valid_Library_Unit_Pragma;
4727 if Nkind (N) = N_Null_Statement then
4731 Lib_Entity := Find_Lib_Unit_Name;
4733 -- This pragma should only apply to a RCI unit (RM E.2.3(23))
4735 if Present (Lib_Entity)
4736 and then not Debug_Flag_U
4738 if not Is_Remote_Call_Interface (Lib_Entity) then
4739 Error_Pragma ("pragma% only apply to rci unit");
4741 -- Set flag for entity of the library unit
4744 Set_Has_All_Calls_Remote (Lib_Entity);
4748 end All_Calls_Remote;
4754 -- pragma Annotate (IDENTIFIER {, ARG});
4755 -- ARG ::= NAME | EXPRESSION
4757 when Pragma_Annotate => Annotate : begin
4759 Check_At_Least_N_Arguments (1);
4760 Check_Arg_Is_Identifier (Arg1);
4768 while Present (Arg) loop
4769 Exp := Expression (Arg);
4772 if Is_Entity_Name (Exp) then
4775 elsif Nkind (Exp) = N_String_Literal then
4776 Resolve (Exp, Standard_String);
4778 elsif Is_Overloaded (Exp) then
4779 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
4794 -- pragma Assert ([Check =>] Boolean_EXPRESSION
4795 -- [, [Message =>] Static_String_EXPRESSION]);
4797 when Pragma_Assert => Assert : declare
4802 Check_At_Least_N_Arguments (1);
4803 Check_At_Most_N_Arguments (2);
4804 Check_Arg_Order ((Name_Check, Name_Message));
4805 Check_Optional_Identifier (Arg1, Name_Check);
4807 if Arg_Count > 1 then
4808 Check_Optional_Identifier (Arg2, Name_Message);
4809 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4812 -- If expansion is active and assertions are inactive, then
4813 -- we rewrite the Assertion as:
4815 -- if False and then condition then
4819 -- The reason we do this rewriting during semantic analysis
4820 -- rather than as part of normal expansion is that we cannot
4821 -- analyze and expand the code for the boolean expression
4822 -- directly, or it may cause insertion of actions that would
4823 -- escape the attempt to suppress the assertion code.
4825 Expr := Expression (Arg1);
4827 if Expander_Active and not Assertions_Enabled then
4829 Make_If_Statement (Loc,
4832 Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
4833 Right_Opnd => Expr),
4834 Then_Statements => New_List (
4835 Make_Null_Statement (Loc))));
4839 -- Otherwise (if assertions are enabled, or if we are not
4840 -- operating with expansion active), then we just analyze
4841 -- and resolve the expression.
4844 Analyze_And_Resolve (Expr, Any_Boolean);
4847 -- If assertion is of the form (X'First = literal), where X is
4848 -- formal parameter, then set Low_Bound_Known flag on this formal.
4850 if Nkind (Expr) = N_Op_Eq then
4852 Right : constant Node_Id := Right_Opnd (Expr);
4853 Left : constant Node_Id := Left_Opnd (Expr);
4855 if Nkind (Left) = N_Attribute_Reference
4856 and then Attribute_Name (Left) = Name_First
4857 and then Is_Entity_Name (Prefix (Left))
4858 and then Is_Formal (Entity (Prefix (Left)))
4859 and then Nkind (Right) = N_Integer_Literal
4861 Set_Low_Bound_Known (Entity (Prefix (Left)));
4867 ----------------------
4868 -- Assertion_Policy --
4869 ----------------------
4871 -- pragma Assertion_Policy (Check | Ignore)
4873 when Pragma_Assertion_Policy =>
4875 Check_Arg_Count (1);
4876 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
4877 Assertions_Enabled := Chars (Expression (Arg1)) = Name_Check;
4883 -- pragma AST_Entry (entry_IDENTIFIER);
4885 when Pragma_AST_Entry => AST_Entry : declare
4891 Check_Arg_Count (1);
4892 Check_No_Identifiers;
4893 Check_Arg_Is_Local_Name (Arg1);
4894 Ent := Entity (Expression (Arg1));
4896 -- Note: the implementation of the AST_Entry pragma could handle
4897 -- the entry family case fine, but for now we are consistent with
4898 -- the DEC rules, and do not allow the pragma, which of course
4899 -- has the effect of also forbidding the attribute.
4901 if Ekind (Ent) /= E_Entry then
4903 ("pragma% argument must be simple entry name", Arg1);
4905 elsif Is_AST_Entry (Ent) then
4907 ("duplicate % pragma for entry", Arg1);
4909 elsif Has_Homonym (Ent) then
4911 ("pragma% argument cannot specify overloaded entry", Arg1);
4915 FF : constant Entity_Id := First_Formal (Ent);
4918 if Present (FF) then
4919 if Present (Next_Formal (FF)) then
4921 ("entry for pragma% can have only one argument",
4924 elsif Parameter_Mode (FF) /= E_In_Parameter then
4926 ("entry parameter for pragma% must have mode IN",
4932 Set_Is_AST_Entry (Ent);
4940 -- pragma Asynchronous (LOCAL_NAME);
4942 when Pragma_Asynchronous => Asynchronous : declare
4950 procedure Process_Async_Pragma;
4951 -- Common processing for procedure and access-to-procedure case
4953 --------------------------
4954 -- Process_Async_Pragma --
4955 --------------------------
4957 procedure Process_Async_Pragma is
4960 Set_Is_Asynchronous (Nm);
4964 -- The formals should be of mode IN (RM E.4.1(6))
4967 while Present (S) loop
4968 Formal := Defining_Identifier (S);
4970 if Nkind (Formal) = N_Defining_Identifier
4971 and then Ekind (Formal) /= E_In_Parameter
4974 ("pragma% procedure can only have IN parameter",
4981 Set_Is_Asynchronous (Nm);
4982 end Process_Async_Pragma;
4984 -- Start of processing for pragma Asynchronous
4987 Check_Ada_83_Warning;
4988 Check_No_Identifiers;
4989 Check_Arg_Count (1);
4990 Check_Arg_Is_Local_Name (Arg1);
4992 if Debug_Flag_U then
4996 C_Ent := Cunit_Entity (Current_Sem_Unit);
4997 Analyze (Expression (Arg1));
4998 Nm := Entity (Expression (Arg1));
5000 if not Is_Remote_Call_Interface (C_Ent)
5001 and then not Is_Remote_Types (C_Ent)
5003 -- This pragma should only appear in an RCI or Remote Types
5004 -- unit (RM E.4.1(4))
5007 ("pragma% not in Remote_Call_Interface or " &
5008 "Remote_Types unit");
5011 if Ekind (Nm) = E_Procedure
5012 and then Nkind (Parent (Nm)) = N_Procedure_Specification
5014 if not Is_Remote_Call_Interface (Nm) then
5016 ("pragma% cannot be applied on non-remote procedure",
5020 L := Parameter_Specifications (Parent (Nm));
5021 Process_Async_Pragma;
5024 elsif Ekind (Nm) = E_Function then
5026 ("pragma% cannot be applied to function", Arg1);
5028 elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
5030 if Is_Record_Type (Nm) then
5031 -- A record type that is the Equivalent_Type for
5032 -- a remote access-to-subprogram type.
5034 N := Declaration_Node (Corresponding_Remote_Type (Nm));
5037 -- A non-expanded RAS type (case where distribution is
5040 N := Declaration_Node (Nm);
5043 if Nkind (N) = N_Full_Type_Declaration
5044 and then Nkind (Type_Definition (N)) =
5045 N_Access_Procedure_Definition
5047 L := Parameter_Specifications (Type_Definition (N));
5048 Process_Async_Pragma;
5050 if Is_Asynchronous (Nm)
5051 and then Expander_Active
5052 and then Get_PCS_Name /= Name_No_DSA
5054 RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
5059 ("pragma% cannot reference access-to-function type",
5063 -- Only other possibility is Access-to-class-wide type
5065 elsif Is_Access_Type (Nm)
5066 and then Is_Class_Wide_Type (Designated_Type (Nm))
5068 Check_First_Subtype (Arg1);
5069 Set_Is_Asynchronous (Nm);
5070 if Expander_Active then
5071 RACW_Type_Is_Asynchronous (Nm);
5075 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
5083 -- pragma Atomic (LOCAL_NAME);
5085 when Pragma_Atomic =>
5086 Process_Atomic_Shared_Volatile;
5088 -----------------------
5089 -- Atomic_Components --
5090 -----------------------
5092 -- pragma Atomic_Components (array_LOCAL_NAME);
5094 -- This processing is shared by Volatile_Components
5096 when Pragma_Atomic_Components |
5097 Pragma_Volatile_Components =>
5099 Atomic_Components : declare
5106 Check_Ada_83_Warning;
5107 Check_No_Identifiers;
5108 Check_Arg_Count (1);
5109 Check_Arg_Is_Local_Name (Arg1);
5110 E_Id := Expression (Arg1);
5112 if Etype (E_Id) = Any_Type then
5118 if Rep_Item_Too_Early (E, N)
5120 Rep_Item_Too_Late (E, N)
5125 D := Declaration_Node (E);
5128 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
5130 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
5131 and then Nkind (D) = N_Object_Declaration
5132 and then Nkind (Object_Definition (D)) =
5133 N_Constrained_Array_Definition)
5135 -- The flag is set on the object, or on the base type
5137 if Nkind (D) /= N_Object_Declaration then
5141 Set_Has_Volatile_Components (E);
5143 if Prag_Id = Pragma_Atomic_Components then
5144 Set_Has_Atomic_Components (E);
5146 if Is_Packed (E) then
5147 Set_Is_Packed (E, False);
5150 ("?Pack canceled, cannot pack atomic components",
5156 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
5158 end Atomic_Components;
5160 --------------------
5161 -- Attach_Handler --
5162 --------------------
5164 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
5166 when Pragma_Attach_Handler =>
5167 Check_Ada_83_Warning;
5168 Check_No_Identifiers;
5169 Check_Arg_Count (2);
5171 if No_Run_Time_Mode then
5172 Error_Msg_CRT ("Attach_Handler pragma", N);
5174 Check_Interrupt_Or_Attach_Handler;
5176 -- The expression that designates the attribute may
5177 -- depend on a discriminant, and is therefore a per-
5178 -- object expression, to be expanded in the init proc.
5179 -- If expansion is enabled, perform semantic checks
5182 if Expander_Active then
5184 Temp : constant Node_Id :=
5185 New_Copy_Tree (Expression (Arg2));
5187 Set_Parent (Temp, N);
5188 Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
5192 Analyze (Expression (Arg2));
5193 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
5196 Process_Interrupt_Or_Attach_Handler;
5199 --------------------
5200 -- C_Pass_By_Copy --
5201 --------------------
5203 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
5205 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
5211 Check_Valid_Configuration_Pragma;
5212 Check_Arg_Count (1);
5213 Check_Optional_Identifier (Arg1, "max_size");
5215 Arg := Expression (Arg1);
5216 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
5218 Val := Expr_Value (Arg);
5222 ("maximum size for pragma% must be positive", Arg1);
5224 elsif UI_Is_In_Int_Range (Val) then
5225 Default_C_Record_Mechanism := UI_To_Int (Val);
5227 -- If a giant value is given, Int'Last will do well enough.
5228 -- If sometime someone complains that a record larger than
5229 -- two gigabytes is not copied, we will worry about it then!
5232 Default_C_Record_Mechanism := Mechanism_Type'Last;
5240 -- pragma Check_Name (check_IDENTIFIER);
5242 when Pragma_Check_Name =>
5243 Check_No_Identifiers;
5245 Check_Valid_Configuration_Pragma;
5246 Check_Arg_Count (1);
5247 Check_Arg_Is_Identifier (Arg1);
5250 Nam : constant Name_Id := Chars (Expression (Arg1));
5253 for J in Check_Names.First .. Check_Names.Last loop
5254 if Check_Names.Table (J) = Nam then
5259 Check_Names.Append (Nam);
5262 ---------------------
5263 -- CIL_Constructor --
5264 ---------------------
5266 -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME);
5268 -- Processing for this pragma is shared with Java_Constructor
5274 -- pragma Comment (static_string_EXPRESSION)
5276 -- Processing for pragma Comment shares the circuitry for
5277 -- pragma Ident. The only differences are that Ident enforces
5278 -- a limit of 31 characters on its argument, and also enforces
5279 -- limitations on placement for DEC compatibility. Pragma
5280 -- Comment shares neither of these restrictions.
5286 -- pragma Common_Object (
5287 -- [Internal =>] LOCAL_NAME,
5288 -- [, [External =>] EXTERNAL_SYMBOL]
5289 -- [, [Size =>] EXTERNAL_SYMBOL]);
5291 -- Processing for this pragma is shared with Psect_Object
5293 ------------------------
5294 -- Compile_Time_Error --
5295 ------------------------
5297 -- pragma Compile_Time_Error
5298 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5300 when Pragma_Compile_Time_Error =>
5301 Process_Compile_Time_Warning_Or_Error;
5303 --------------------------
5304 -- Compile_Time_Warning --
5305 --------------------------
5307 -- pragma Compile_Time_Warning
5308 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5310 when Pragma_Compile_Time_Warning =>
5311 Process_Compile_Time_Warning_Or_Error;
5317 when Pragma_Compiler_Unit =>
5319 Check_Arg_Count (0);
5320 Set_Is_Compiler_Unit (Get_Source_Unit (N));
5322 -----------------------------
5323 -- Complete_Representation --
5324 -----------------------------
5326 -- pragma Complete_Representation;
5328 when Pragma_Complete_Representation =>
5330 Check_Arg_Count (0);
5332 if Nkind (Parent (N)) /= N_Record_Representation_Clause then
5334 ("pragma & must appear within record representation clause");
5337 ----------------------------
5338 -- Complex_Representation --
5339 ----------------------------
5341 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
5343 when Pragma_Complex_Representation => Complex_Representation : declare
5350 Check_Arg_Count (1);
5351 Check_Optional_Identifier (Arg1, Name_Entity);
5352 Check_Arg_Is_Local_Name (Arg1);
5353 E_Id := Expression (Arg1);
5355 if Etype (E_Id) = Any_Type then
5361 if not Is_Record_Type (E) then
5363 ("argument for pragma% must be record type", Arg1);
5366 Ent := First_Entity (E);
5369 or else No (Next_Entity (Ent))
5370 or else Present (Next_Entity (Next_Entity (Ent)))
5371 or else not Is_Floating_Point_Type (Etype (Ent))
5372 or else Etype (Ent) /= Etype (Next_Entity (Ent))
5375 ("record for pragma% must have two fields of same fpt type",
5379 Set_Has_Complex_Representation (Base_Type (E));
5381 -- We need to treat the type has having a non-standard
5382 -- representation, for back-end purposes, even though in
5383 -- general a complex will have the default representation
5384 -- of a record with two real components.
5386 Set_Has_Non_Standard_Rep (Base_Type (E));
5388 end Complex_Representation;
5390 -------------------------
5391 -- Component_Alignment --
5392 -------------------------
5394 -- pragma Component_Alignment (
5395 -- [Form =>] ALIGNMENT_CHOICE
5396 -- [, [Name =>] type_LOCAL_NAME]);
5398 -- ALIGNMENT_CHOICE ::=
5400 -- | Component_Size_4
5404 when Pragma_Component_Alignment => Component_AlignmentP : declare
5405 Args : Args_List (1 .. 2);
5406 Names : constant Name_List (1 .. 2) := (
5410 Form : Node_Id renames Args (1);
5411 Name : Node_Id renames Args (2);
5413 Atype : Component_Alignment_Kind;
5418 Gather_Associations (Names, Args);
5421 Error_Pragma ("missing Form argument for pragma%");
5424 Check_Arg_Is_Identifier (Form);
5426 -- Get proper alignment, note that Default = Component_Size
5427 -- on all machines we have so far, and we want to set this
5428 -- value rather than the default value to indicate that it
5429 -- has been explicitly set (and thus will not get overridden
5430 -- by the default component alignment for the current scope)
5432 if Chars (Form) = Name_Component_Size then
5433 Atype := Calign_Component_Size;
5435 elsif Chars (Form) = Name_Component_Size_4 then
5436 Atype := Calign_Component_Size_4;
5438 elsif Chars (Form) = Name_Default then
5439 Atype := Calign_Component_Size;
5441 elsif Chars (Form) = Name_Storage_Unit then
5442 Atype := Calign_Storage_Unit;
5446 ("invalid Form parameter for pragma%", Form);
5449 -- Case with no name, supplied, affects scope table entry
5453 (Scope_Stack.Last).Component_Alignment_Default := Atype;
5455 -- Case of name supplied
5458 Check_Arg_Is_Local_Name (Name);
5460 Typ := Entity (Name);
5463 or else Rep_Item_Too_Early (Typ, N)
5467 Typ := Underlying_Type (Typ);
5470 if not Is_Record_Type (Typ)
5471 and then not Is_Array_Type (Typ)
5474 ("Name parameter of pragma% must identify record or " &
5475 "array type", Name);
5478 -- An explicit Component_Alignment pragma overrides an
5479 -- implicit pragma Pack, but not an explicit one.
5481 if not Has_Pragma_Pack (Base_Type (Typ)) then
5482 Set_Is_Packed (Base_Type (Typ), False);
5483 Set_Component_Alignment (Base_Type (Typ), Atype);
5486 end Component_AlignmentP;
5492 -- pragma Controlled (first_subtype_LOCAL_NAME);
5494 when Pragma_Controlled => Controlled : declare
5498 Check_No_Identifiers;
5499 Check_Arg_Count (1);
5500 Check_Arg_Is_Local_Name (Arg1);
5501 Arg := Expression (Arg1);
5503 if not Is_Entity_Name (Arg)
5504 or else not Is_Access_Type (Entity (Arg))
5506 Error_Pragma_Arg ("pragma% requires access type", Arg1);
5508 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
5516 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
5517 -- [Entity =>] LOCAL_NAME);
5519 when Pragma_Convention => Convention : declare
5522 pragma Warnings (Off, C);
5523 pragma Warnings (Off, E);
5525 Check_Arg_Order ((Name_Convention, Name_Entity));
5526 Check_Ada_83_Warning;
5527 Check_Arg_Count (2);
5528 Process_Convention (C, E);
5531 ---------------------------
5532 -- Convention_Identifier --
5533 ---------------------------
5535 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
5536 -- [Convention =>] convention_IDENTIFIER);
5538 when Pragma_Convention_Identifier => Convention_Identifier : declare
5544 Check_Arg_Order ((Name_Name, Name_Convention));
5545 Check_Arg_Count (2);
5546 Check_Optional_Identifier (Arg1, Name_Name);
5547 Check_Optional_Identifier (Arg2, Name_Convention);
5548 Check_Arg_Is_Identifier (Arg1);
5549 Check_Arg_Is_Identifier (Arg2);
5550 Idnam := Chars (Expression (Arg1));
5551 Cname := Chars (Expression (Arg2));
5553 if Is_Convention_Name (Cname) then
5554 Record_Convention_Identifier
5555 (Idnam, Get_Convention_Id (Cname));
5558 ("second arg for % pragma must be convention", Arg2);
5560 end Convention_Identifier;
5566 -- pragma CPP_Class ([Entity =>] local_NAME)
5568 when Pragma_CPP_Class => CPP_Class : declare
5573 if Warn_On_Obsolescent_Feature then
5575 ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" &
5576 " by pragma import?", N);
5580 Check_Arg_Count (1);
5581 Check_Optional_Identifier (Arg1, Name_Entity);
5582 Check_Arg_Is_Local_Name (Arg1);
5584 Arg := Expression (Arg1);
5587 if Etype (Arg) = Any_Type then
5591 if not Is_Entity_Name (Arg)
5592 or else not Is_Type (Entity (Arg))
5594 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
5597 Typ := Entity (Arg);
5599 if not Is_Tagged_Type (Typ) then
5600 Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1);
5603 -- Types treated as CPP classes are treated as limited, but we
5604 -- don't require them to be declared this way. A warning is issued
5605 -- to encourage the user to declare them as limited. This is not
5606 -- an error, for compatibility reasons, because these types have
5607 -- been supported this way for some time.
5609 if not Is_Limited_Type (Typ) then
5611 ("imported 'C'P'P type should be " &
5612 "explicitly declared limited?",
5613 Get_Pragma_Arg (Arg1));
5615 ("\type will be considered limited",
5616 Get_Pragma_Arg (Arg1));
5619 Set_Is_CPP_Class (Typ);
5620 Set_Is_Limited_Record (Typ);
5621 Set_Convention (Typ, Convention_CPP);
5624 ---------------------
5625 -- CPP_Constructor --
5626 ---------------------
5628 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME
5629 -- [, [External_Name =>] static_string_EXPRESSION ]
5630 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5632 when Pragma_CPP_Constructor => CPP_Constructor : declare
5638 Check_At_Least_N_Arguments (1);
5639 Check_At_Most_N_Arguments (3);
5640 Check_Optional_Identifier (Arg1, Name_Entity);
5641 Check_Arg_Is_Local_Name (Arg1);
5643 Id := Expression (Arg1);
5644 Find_Program_Unit_Name (Id);
5646 -- If we did not find the name, we are done
5648 if Etype (Id) = Any_Type then
5652 Def_Id := Entity (Id);
5654 if Ekind (Def_Id) = E_Function
5655 and then Is_Class_Wide_Type (Etype (Def_Id))
5656 and then Is_CPP_Class (Etype (Etype (Def_Id)))
5658 if Arg_Count >= 2 then
5659 Set_Imported (Def_Id);
5660 Set_Is_Public (Def_Id);
5661 Process_Interface_Name (Def_Id, Arg2, Arg3);
5664 if No (Parameter_Specifications (Parent (Def_Id))) then
5665 Set_Has_Completion (Def_Id);
5666 Set_Is_Constructor (Def_Id);
5669 ("non-default constructors not implemented", Arg1);
5674 ("pragma% requires function returning a 'C'P'P_Class type",
5677 end CPP_Constructor;
5683 when Pragma_CPP_Virtual => CPP_Virtual : declare
5685 if Warn_On_Obsolescent_Feature then
5687 ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " &
5696 when Pragma_CPP_Vtable => CPP_Vtable : declare
5698 if Warn_On_Obsolescent_Feature then
5700 ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " &
5709 -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
5711 when Pragma_Debug => Debug : declare
5719 (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
5722 if Arg_Count = 2 then
5725 Left_Opnd => Relocate_Node (Cond),
5726 Right_Opnd => Expression (Arg1));
5729 -- Rewrite into a conditional with an appropriate condition. We
5730 -- wrap the procedure call in a block so that overhead from e.g.
5731 -- use of the secondary stack does not generate execution overhead
5732 -- for suppressed conditions.
5734 Rewrite (N, Make_Implicit_If_Statement (N,
5736 Then_Statements => New_List (
5737 Make_Block_Statement (Loc,
5738 Handled_Statement_Sequence =>
5739 Make_Handled_Sequence_Of_Statements (Loc,
5740 Statements => New_List (
5741 Relocate_Node (Debug_Statement (N))))))));
5749 -- pragma Debug_Policy (Check | Ignore)
5751 when Pragma_Debug_Policy =>
5753 Check_Arg_Count (1);
5754 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
5755 Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
5757 ---------------------
5758 -- Detect_Blocking --
5759 ---------------------
5761 -- pragma Detect_Blocking;
5763 when Pragma_Detect_Blocking =>
5765 Check_Arg_Count (0);
5766 Check_Valid_Configuration_Pragma;
5767 Detect_Blocking := True;
5773 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
5775 when Pragma_Discard_Names => Discard_Names : declare
5780 Check_Ada_83_Warning;
5782 -- Deal with configuration pragma case
5784 if Arg_Count = 0 and then Is_Configuration_Pragma then
5785 Global_Discard_Names := True;
5788 -- Otherwise, check correct appropriate context
5791 Check_Is_In_Decl_Part_Or_Package_Spec;
5793 if Arg_Count = 0 then
5795 -- If there is no parameter, then from now on this pragma
5796 -- applies to any enumeration, exception or tagged type
5797 -- defined in the current declarative part, and recursively
5798 -- to any nested scope.
5800 Set_Discard_Names (Current_Scope);
5804 Check_Arg_Count (1);
5805 Check_Optional_Identifier (Arg1, Name_On);
5806 Check_Arg_Is_Local_Name (Arg1);
5807 E_Id := Expression (Arg1);
5809 if Etype (E_Id) = Any_Type then
5815 if (Is_First_Subtype (E)
5816 and then (Is_Enumeration_Type (E)
5817 or else Is_Tagged_Type (E)))
5818 or else Ekind (E) = E_Exception
5820 Set_Discard_Names (E);
5823 ("inappropriate entity for pragma%", Arg1);
5833 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
5835 when Pragma_Elaborate => Elaborate : declare
5840 -- Pragma must be in context items list of a compilation unit
5842 if not Is_In_Context_Clause then
5846 -- Must be at least one argument
5848 if Arg_Count = 0 then
5849 Error_Pragma ("pragma% requires at least one argument");
5852 -- In Ada 83 mode, there can be no items following it in the
5853 -- context list except other pragmas and implicit with clauses
5854 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
5855 -- placement rule does not apply.
5857 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
5859 while Present (Citem) loop
5860 if Nkind (Citem) = N_Pragma
5861 or else (Nkind (Citem) = N_With_Clause
5862 and then Implicit_With (Citem))
5867 ("(Ada 83) pragma% must be at end of context clause");
5874 -- Finally, the arguments must all be units mentioned in a with
5875 -- clause in the same context clause. Note we already checked (in
5876 -- Par.Prag) that the arguments are all identifiers or selected
5880 Outer : while Present (Arg) loop
5881 Citem := First (List_Containing (N));
5882 Inner : while Citem /= N loop
5883 if Nkind (Citem) = N_With_Clause
5884 and then Same_Name (Name (Citem), Expression (Arg))
5886 Set_Elaborate_Present (Citem, True);
5887 Set_Unit_Name (Expression (Arg), Name (Citem));
5889 -- With the pragma present, elaboration calls on
5890 -- subprograms from the named unit need no further
5891 -- checks, as long as the pragma appears in the current
5892 -- compilation unit. If the pragma appears in some unit
5893 -- in the context, there might still be a need for an
5894 -- Elaborate_All_Desirable from the current compilation
5895 -- to the the named unit, so we keep the check enabled.
5897 if In_Extended_Main_Source_Unit (N) then
5898 Set_Suppress_Elaboration_Warnings
5899 (Entity (Name (Citem)));
5910 ("argument of pragma% is not with'ed unit", Arg);
5916 -- Give a warning if operating in static mode with -gnatwl
5917 -- (elaboration warnings eanbled) switch set.
5919 if Elab_Warnings and not Dynamic_Elaboration_Checks then
5921 ("?use of pragma Elaborate may not be safe", N);
5923 ("?use pragma Elaborate_All instead if possible", N);
5931 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
5933 when Pragma_Elaborate_All => Elaborate_All : declare
5938 Check_Ada_83_Warning;
5940 -- Pragma must be in context items list of a compilation unit
5942 if not Is_In_Context_Clause then
5946 -- Must be at least one argument
5948 if Arg_Count = 0 then
5949 Error_Pragma ("pragma% requires at least one argument");
5952 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
5953 -- have to appear at the end of the context clause, but may
5954 -- appear mixed in with other items, even in Ada 83 mode.
5956 -- Final check: the arguments must all be units mentioned in
5957 -- a with clause in the same context clause. Note that we
5958 -- already checked (in Par.Prag) that all the arguments are
5959 -- either identifiers or selected components.
5962 Outr : while Present (Arg) loop
5963 Citem := First (List_Containing (N));
5964 Innr : while Citem /= N loop
5965 if Nkind (Citem) = N_With_Clause
5966 and then Same_Name (Name (Citem), Expression (Arg))
5968 Set_Elaborate_All_Present (Citem, True);
5969 Set_Unit_Name (Expression (Arg), Name (Citem));
5971 -- Suppress warnings and elaboration checks on the named
5972 -- unit if the pragma is in the current compilation, as
5973 -- for pragma Elaborate.
5975 if In_Extended_Main_Source_Unit (N) then
5976 Set_Suppress_Elaboration_Warnings
5977 (Entity (Name (Citem)));
5986 Set_Error_Posted (N);
5988 ("argument of pragma% is not with'ed unit", Arg);
5995 --------------------
5996 -- Elaborate_Body --
5997 --------------------
5999 -- pragma Elaborate_Body [( library_unit_NAME )];
6001 when Pragma_Elaborate_Body => Elaborate_Body : declare
6002 Cunit_Node : Node_Id;
6003 Cunit_Ent : Entity_Id;
6006 Check_Ada_83_Warning;
6007 Check_Valid_Library_Unit_Pragma;
6009 if Nkind (N) = N_Null_Statement then
6013 Cunit_Node := Cunit (Current_Sem_Unit);
6014 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
6016 if Nkind (Unit (Cunit_Node)) = N_Package_Body
6018 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
6020 Error_Pragma ("pragma% must refer to a spec, not a body");
6022 Set_Body_Required (Cunit_Node, True);
6023 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
6025 -- If we are in dynamic elaboration mode, then we suppress
6026 -- elaboration warnings for the unit, since it is definitely
6027 -- fine NOT to do dynamic checks at the first level (and such
6028 -- checks will be suppressed because no elaboration boolean
6029 -- is created for Elaborate_Body packages).
6031 -- But in the static model of elaboration, Elaborate_Body is
6032 -- definitely NOT good enough to ensure elaboration safety on
6033 -- its own, since the body may WITH other units that are not
6034 -- safe from an elaboration point of view, so a client must
6035 -- still do an Elaborate_All on such units.
6037 -- Debug flag -gnatdD restores the old behavior of 3.13,
6038 -- where Elaborate_Body always suppressed elab warnings.
6040 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
6041 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
6046 ------------------------
6047 -- Elaboration_Checks --
6048 ------------------------
6050 -- pragma Elaboration_Checks (Static | Dynamic);
6052 when Pragma_Elaboration_Checks =>
6054 Check_Arg_Count (1);
6055 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
6056 Dynamic_Elaboration_Checks :=
6057 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
6063 -- pragma Eliminate (
6064 -- [Unit_Name =>] IDENTIFIER |
6065 -- SELECTED_COMPONENT
6066 -- [,[Entity =>] IDENTIFIER |
6067 -- SELECTED_COMPONENT |
6069 -- [,]OVERLOADING_RESOLUTION);
6071 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
6074 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
6077 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
6079 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
6080 -- Result_Type => result_SUBTYPE_NAME]
6082 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
6083 -- SUBTYPE_NAME ::= STRING_LITERAL
6085 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
6086 -- SOURCE_TRACE ::= STRING_LITERAL
6088 when Pragma_Eliminate => Eliminate : declare
6089 Args : Args_List (1 .. 5);
6090 Names : constant Name_List (1 .. 5) := (
6093 Name_Parameter_Types,
6095 Name_Source_Location);
6097 Unit_Name : Node_Id renames Args (1);
6098 Entity : Node_Id renames Args (2);
6099 Parameter_Types : Node_Id renames Args (3);
6100 Result_Type : Node_Id renames Args (4);
6101 Source_Location : Node_Id renames Args (5);
6105 Check_Valid_Configuration_Pragma;
6106 Gather_Associations (Names, Args);
6108 if No (Unit_Name) then
6109 Error_Pragma ("missing Unit_Name argument for pragma%");
6113 and then (Present (Parameter_Types)
6115 Present (Result_Type)
6117 Present (Source_Location))
6119 Error_Pragma ("missing Entity argument for pragma%");
6122 if (Present (Parameter_Types)
6124 Present (Result_Type))
6126 Present (Source_Location)
6129 ("parameter profile and source location cannot " &
6130 "be used together in pragma%");
6133 Process_Eliminate_Pragma
6147 -- [ Convention =>] convention_IDENTIFIER,
6148 -- [ Entity =>] local_NAME
6149 -- [, [External_Name =>] static_string_EXPRESSION ]
6150 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6152 when Pragma_Export => Export : declare
6156 pragma Warnings (Off, C);
6159 Check_Ada_83_Warning;
6165 Check_At_Least_N_Arguments (2);
6166 Check_At_Most_N_Arguments (4);
6167 Process_Convention (C, Def_Id);
6169 if Ekind (Def_Id) /= E_Constant then
6170 Note_Possible_Modification (Expression (Arg2));
6173 Process_Interface_Name (Def_Id, Arg3, Arg4);
6174 Set_Exported (Def_Id, Arg2);
6177 ----------------------
6178 -- Export_Exception --
6179 ----------------------
6181 -- pragma Export_Exception (
6182 -- [Internal =>] LOCAL_NAME,
6183 -- [, [External =>] EXTERNAL_SYMBOL,]
6184 -- [, [Form =>] Ada | VMS]
6185 -- [, [Code =>] static_integer_EXPRESSION]);
6187 when Pragma_Export_Exception => Export_Exception : declare
6188 Args : Args_List (1 .. 4);
6189 Names : constant Name_List (1 .. 4) := (
6195 Internal : Node_Id renames Args (1);
6196 External : Node_Id renames Args (2);
6197 Form : Node_Id renames Args (3);
6198 Code : Node_Id renames Args (4);
6201 if Inside_A_Generic then
6202 Error_Pragma ("pragma% cannot be used for generic entities");
6205 Gather_Associations (Names, Args);
6206 Process_Extended_Import_Export_Exception_Pragma (
6207 Arg_Internal => Internal,
6208 Arg_External => External,
6212 if not Is_VMS_Exception (Entity (Internal)) then
6213 Set_Exported (Entity (Internal), Internal);
6215 end Export_Exception;
6217 ---------------------
6218 -- Export_Function --
6219 ---------------------
6221 -- pragma Export_Function (
6222 -- [Internal =>] LOCAL_NAME,
6223 -- [, [External =>] EXTERNAL_SYMBOL,]
6224 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6225 -- [, [Result_Type =>] TYPE_DESIGNATOR]
6226 -- [, [Mechanism =>] MECHANISM]
6227 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
6229 -- EXTERNAL_SYMBOL ::=
6231 -- | static_string_EXPRESSION
6233 -- PARAMETER_TYPES ::=
6235 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6237 -- TYPE_DESIGNATOR ::=
6239 -- | subtype_Name ' Access
6243 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6245 -- MECHANISM_ASSOCIATION ::=
6246 -- [formal_parameter_NAME =>] MECHANISM_NAME
6248 -- MECHANISM_NAME ::=
6251 -- | Descriptor [([Class =>] CLASS_NAME)]
6253 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6255 when Pragma_Export_Function => Export_Function : declare
6256 Args : Args_List (1 .. 6);
6257 Names : constant Name_List (1 .. 6) := (
6260 Name_Parameter_Types,
6263 Name_Result_Mechanism);
6265 Internal : Node_Id renames Args (1);
6266 External : Node_Id renames Args (2);
6267 Parameter_Types : Node_Id renames Args (3);
6268 Result_Type : Node_Id renames Args (4);
6269 Mechanism : Node_Id renames Args (5);
6270 Result_Mechanism : Node_Id renames Args (6);
6274 Gather_Associations (Names, Args);
6275 Process_Extended_Import_Export_Subprogram_Pragma (
6276 Arg_Internal => Internal,
6277 Arg_External => External,
6278 Arg_Parameter_Types => Parameter_Types,
6279 Arg_Result_Type => Result_Type,
6280 Arg_Mechanism => Mechanism,
6281 Arg_Result_Mechanism => Result_Mechanism);
6282 end Export_Function;
6288 -- pragma Export_Object (
6289 -- [Internal =>] LOCAL_NAME,
6290 -- [, [External =>] EXTERNAL_SYMBOL]
6291 -- [, [Size =>] EXTERNAL_SYMBOL]);
6293 -- EXTERNAL_SYMBOL ::=
6295 -- | static_string_EXPRESSION
6297 -- PARAMETER_TYPES ::=
6299 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6301 -- TYPE_DESIGNATOR ::=
6303 -- | subtype_Name ' Access
6307 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6309 -- MECHANISM_ASSOCIATION ::=
6310 -- [formal_parameter_NAME =>] MECHANISM_NAME
6312 -- MECHANISM_NAME ::=
6315 -- | Descriptor [([Class =>] CLASS_NAME)]
6317 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6319 when Pragma_Export_Object => Export_Object : declare
6320 Args : Args_List (1 .. 3);
6321 Names : constant Name_List (1 .. 3) := (
6326 Internal : Node_Id renames Args (1);
6327 External : Node_Id renames Args (2);
6328 Size : Node_Id renames Args (3);
6332 Gather_Associations (Names, Args);
6333 Process_Extended_Import_Export_Object_Pragma (
6334 Arg_Internal => Internal,
6335 Arg_External => External,
6339 ----------------------
6340 -- Export_Procedure --
6341 ----------------------
6343 -- pragma Export_Procedure (
6344 -- [Internal =>] LOCAL_NAME,
6345 -- [, [External =>] EXTERNAL_SYMBOL,]
6346 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6347 -- [, [Mechanism =>] MECHANISM]);
6349 -- EXTERNAL_SYMBOL ::=
6351 -- | static_string_EXPRESSION
6353 -- PARAMETER_TYPES ::=
6355 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6357 -- TYPE_DESIGNATOR ::=
6359 -- | subtype_Name ' Access
6363 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6365 -- MECHANISM_ASSOCIATION ::=
6366 -- [formal_parameter_NAME =>] MECHANISM_NAME
6368 -- MECHANISM_NAME ::=
6371 -- | Descriptor [([Class =>] CLASS_NAME)]
6373 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6375 when Pragma_Export_Procedure => Export_Procedure : declare
6376 Args : Args_List (1 .. 4);
6377 Names : constant Name_List (1 .. 4) := (
6380 Name_Parameter_Types,
6383 Internal : Node_Id renames Args (1);
6384 External : Node_Id renames Args (2);
6385 Parameter_Types : Node_Id renames Args (3);
6386 Mechanism : Node_Id renames Args (4);
6390 Gather_Associations (Names, Args);
6391 Process_Extended_Import_Export_Subprogram_Pragma (
6392 Arg_Internal => Internal,
6393 Arg_External => External,
6394 Arg_Parameter_Types => Parameter_Types,
6395 Arg_Mechanism => Mechanism);
6396 end Export_Procedure;
6402 -- pragma Export_Value (
6403 -- [Value =>] static_integer_EXPRESSION,
6404 -- [Link_Name =>] static_string_EXPRESSION);
6406 when Pragma_Export_Value =>
6408 Check_Arg_Order ((Name_Value, Name_Link_Name));
6409 Check_Arg_Count (2);
6411 Check_Optional_Identifier (Arg1, Name_Value);
6412 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6414 Check_Optional_Identifier (Arg2, Name_Link_Name);
6415 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
6417 -----------------------------
6418 -- Export_Valued_Procedure --
6419 -----------------------------
6421 -- pragma Export_Valued_Procedure (
6422 -- [Internal =>] LOCAL_NAME,
6423 -- [, [External =>] EXTERNAL_SYMBOL,]
6424 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6425 -- [, [Mechanism =>] MECHANISM]);
6427 -- EXTERNAL_SYMBOL ::=
6429 -- | static_string_EXPRESSION
6431 -- PARAMETER_TYPES ::=
6433 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6435 -- TYPE_DESIGNATOR ::=
6437 -- | subtype_Name ' Access
6441 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6443 -- MECHANISM_ASSOCIATION ::=
6444 -- [formal_parameter_NAME =>] MECHANISM_NAME
6446 -- MECHANISM_NAME ::=
6449 -- | Descriptor [([Class =>] CLASS_NAME)]
6451 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6453 when Pragma_Export_Valued_Procedure =>
6454 Export_Valued_Procedure : declare
6455 Args : Args_List (1 .. 4);
6456 Names : constant Name_List (1 .. 4) := (
6459 Name_Parameter_Types,
6462 Internal : Node_Id renames Args (1);
6463 External : Node_Id renames Args (2);
6464 Parameter_Types : Node_Id renames Args (3);
6465 Mechanism : Node_Id renames Args (4);
6469 Gather_Associations (Names, Args);
6470 Process_Extended_Import_Export_Subprogram_Pragma (
6471 Arg_Internal => Internal,
6472 Arg_External => External,
6473 Arg_Parameter_Types => Parameter_Types,
6474 Arg_Mechanism => Mechanism);
6475 end Export_Valued_Procedure;
6481 -- pragma Extend_System ([Name =>] Identifier);
6483 when Pragma_Extend_System => Extend_System : declare
6486 Check_Valid_Configuration_Pragma;
6487 Check_Arg_Count (1);
6488 Check_Optional_Identifier (Arg1, Name_Name);
6489 Check_Arg_Is_Identifier (Arg1);
6491 Get_Name_String (Chars (Expression (Arg1)));
6494 and then Name_Buffer (1 .. 4) = "aux_"
6496 if Present (System_Extend_Pragma_Arg) then
6497 if Chars (Expression (Arg1)) =
6498 Chars (Expression (System_Extend_Pragma_Arg))
6502 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
6503 Error_Pragma ("pragma% conflicts with that #");
6507 System_Extend_Pragma_Arg := Arg1;
6509 if not GNAT_Mode then
6510 System_Extend_Unit := Arg1;
6514 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
6518 ------------------------
6519 -- Extensions_Allowed --
6520 ------------------------
6522 -- pragma Extensions_Allowed (ON | OFF);
6524 when Pragma_Extensions_Allowed =>
6526 Check_Arg_Count (1);
6527 Check_No_Identifiers;
6528 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
6530 if Chars (Expression (Arg1)) = Name_On then
6531 Extensions_Allowed := True;
6533 Extensions_Allowed := False;
6540 -- pragma External (
6541 -- [ Convention =>] convention_IDENTIFIER,
6542 -- [ Entity =>] local_NAME
6543 -- [, [External_Name =>] static_string_EXPRESSION ]
6544 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6546 when Pragma_External => External : declare
6550 pragma Warnings (Off, C);
6559 Check_At_Least_N_Arguments (2);
6560 Check_At_Most_N_Arguments (4);
6561 Process_Convention (C, Def_Id);
6562 Note_Possible_Modification (Expression (Arg2));
6563 Process_Interface_Name (Def_Id, Arg3, Arg4);
6564 Set_Exported (Def_Id, Arg2);
6567 --------------------------
6568 -- External_Name_Casing --
6569 --------------------------
6571 -- pragma External_Name_Casing (
6572 -- UPPERCASE | LOWERCASE
6573 -- [, AS_IS | UPPERCASE | LOWERCASE]);
6575 when Pragma_External_Name_Casing => External_Name_Casing : declare
6578 Check_No_Identifiers;
6580 if Arg_Count = 2 then
6582 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
6584 case Chars (Get_Pragma_Arg (Arg2)) is
6586 Opt.External_Name_Exp_Casing := As_Is;
6588 when Name_Uppercase =>
6589 Opt.External_Name_Exp_Casing := Uppercase;
6591 when Name_Lowercase =>
6592 Opt.External_Name_Exp_Casing := Lowercase;
6599 Check_Arg_Count (1);
6602 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
6604 case Chars (Get_Pragma_Arg (Arg1)) is
6605 when Name_Uppercase =>
6606 Opt.External_Name_Imp_Casing := Uppercase;
6608 when Name_Lowercase =>
6609 Opt.External_Name_Imp_Casing := Lowercase;
6614 end External_Name_Casing;
6616 ---------------------------
6617 -- Finalize_Storage_Only --
6618 ---------------------------
6620 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
6622 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
6623 Assoc : constant Node_Id := Arg1;
6624 Type_Id : constant Node_Id := Expression (Assoc);
6628 Check_No_Identifiers;
6629 Check_Arg_Count (1);
6630 Check_Arg_Is_Local_Name (Arg1);
6632 Find_Type (Type_Id);
6633 Typ := Entity (Type_Id);
6636 or else Rep_Item_Too_Early (Typ, N)
6640 Typ := Underlying_Type (Typ);
6643 if not Is_Controlled (Typ) then
6644 Error_Pragma ("pragma% must specify controlled type");
6647 Check_First_Subtype (Arg1);
6649 if Finalize_Storage_Only (Typ) then
6650 Error_Pragma ("duplicate pragma%, only one allowed");
6652 elsif not Rep_Item_Too_Late (Typ, N) then
6653 Set_Finalize_Storage_Only (Base_Type (Typ), True);
6655 end Finalize_Storage;
6657 --------------------------
6658 -- Float_Representation --
6659 --------------------------
6661 -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
6663 -- FLOAT_REP ::= VAX_Float | IEEE_Float
6665 when Pragma_Float_Representation => Float_Representation : declare
6673 if Arg_Count = 1 then
6674 Check_Valid_Configuration_Pragma;
6676 Check_Arg_Count (2);
6677 Check_Optional_Identifier (Arg2, Name_Entity);
6678 Check_Arg_Is_Local_Name (Arg2);
6681 Check_No_Identifier (Arg1);
6682 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
6684 if not OpenVMS_On_Target then
6685 if Chars (Expression (Arg1)) = Name_VAX_Float then
6687 ("?pragma% ignored (applies only to Open'V'M'S)");
6693 -- One argument case
6695 if Arg_Count = 1 then
6696 if Chars (Expression (Arg1)) = Name_VAX_Float then
6697 if Opt.Float_Format = 'I' then
6698 Error_Pragma ("'I'E'E'E format previously specified");
6701 Opt.Float_Format := 'V';
6704 if Opt.Float_Format = 'V' then
6705 Error_Pragma ("'V'A'X format previously specified");
6708 Opt.Float_Format := 'I';
6711 Set_Standard_Fpt_Formats;
6713 -- Two argument case
6716 Argx := Get_Pragma_Arg (Arg2);
6718 if not Is_Entity_Name (Argx)
6719 or else not Is_Floating_Point_Type (Entity (Argx))
6722 ("second argument of% pragma must be floating-point type",
6726 Ent := Entity (Argx);
6727 Digs := UI_To_Int (Digits_Value (Ent));
6729 -- Two arguments, VAX_Float case
6731 if Chars (Expression (Arg1)) = Name_VAX_Float then
6733 when 6 => Set_F_Float (Ent);
6734 when 9 => Set_D_Float (Ent);
6735 when 15 => Set_G_Float (Ent);
6739 ("wrong digits value, must be 6,9 or 15", Arg2);
6742 -- Two arguments, IEEE_Float case
6746 when 6 => Set_IEEE_Short (Ent);
6747 when 15 => Set_IEEE_Long (Ent);
6751 ("wrong digits value, must be 6 or 15", Arg2);
6755 end Float_Representation;
6761 -- pragma Ident (static_string_EXPRESSION)
6763 -- Note: pragma Comment shares this processing. Pragma Comment
6764 -- is identical to Ident, except that the restriction of the
6765 -- argument to 31 characters and the placement restrictions
6766 -- are not enforced for pragma Comment.
6768 when Pragma_Ident | Pragma_Comment => Ident : declare
6773 Check_Arg_Count (1);
6774 Check_No_Identifiers;
6775 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
6777 -- For pragma Ident, preserve DEC compatibility by requiring
6778 -- the pragma to appear in a declarative part or package spec.
6780 if Prag_Id = Pragma_Ident then
6781 Check_Is_In_Decl_Part_Or_Package_Spec;
6784 Str := Expr_Value_S (Expression (Arg1));
6791 GP := Parent (Parent (N));
6793 if Nkind (GP) = N_Package_Declaration
6795 Nkind (GP) = N_Generic_Package_Declaration
6800 -- If we have a compilation unit, then record the ident
6801 -- value, checking for improper duplication.
6803 if Nkind (GP) = N_Compilation_Unit then
6804 CS := Ident_String (Current_Sem_Unit);
6806 if Present (CS) then
6808 -- For Ident, we do not permit multiple instances
6810 if Prag_Id = Pragma_Ident then
6811 Error_Pragma ("duplicate% pragma not permitted");
6813 -- For Comment, we concatenate the string, unless we
6814 -- want to preserve the tree structure for ASIS.
6816 elsif not ASIS_Mode then
6817 Start_String (Strval (CS));
6818 Store_String_Char (' ');
6819 Store_String_Chars (Strval (Str));
6820 Set_Strval (CS, End_String);
6824 -- In VMS, the effect of IDENT is achieved by passing
6825 -- IDENTIFICATION=name as a --for-linker switch.
6827 if OpenVMS_On_Target then
6830 ("--for-linker=IDENTIFICATION=");
6831 String_To_Name_Buffer (Strval (Str));
6832 Store_String_Chars (Name_Buffer (1 .. Name_Len));
6834 -- Only the last processed IDENT is saved. The main
6835 -- purpose is so an IDENT associated with a main
6836 -- procedure will be used in preference to an IDENT
6837 -- associated with a with'd package.
6839 Replace_Linker_Option_String
6840 (End_String, "--for-linker=IDENTIFICATION=");
6843 Set_Ident_String (Current_Sem_Unit, Str);
6846 -- For subunits, we just ignore the Ident, since in GNAT
6847 -- these are not separate object files, and hence not
6848 -- separate units in the unit table.
6850 elsif Nkind (GP) = N_Subunit then
6853 -- Otherwise we have a misplaced pragma Ident, but we ignore
6854 -- this if we are in an instantiation, since it comes from
6855 -- a generic, and has no relevance to the instantiation.
6857 elsif Prag_Id = Pragma_Ident then
6858 if Instantiation_Location (Loc) = No_Location then
6859 Error_Pragma ("pragma% only allowed at outer level");
6865 -----------------------
6866 -- Implicit_Packing --
6867 -----------------------
6869 -- pragma Implicit_Packing;
6871 when Pragma_Implicit_Packing =>
6873 Check_Arg_Count (0);
6874 Implicit_Packing := True;
6881 -- [ Convention =>] convention_IDENTIFIER,
6882 -- [ Entity =>] local_NAME
6883 -- [, [External_Name =>] static_string_EXPRESSION ]
6884 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6886 when Pragma_Import =>
6887 Check_Ada_83_Warning;
6893 Check_At_Least_N_Arguments (2);
6894 Check_At_Most_N_Arguments (4);
6895 Process_Import_Or_Interface;
6897 ----------------------
6898 -- Import_Exception --
6899 ----------------------
6901 -- pragma Import_Exception (
6902 -- [Internal =>] LOCAL_NAME,
6903 -- [, [External =>] EXTERNAL_SYMBOL,]
6904 -- [, [Form =>] Ada | VMS]
6905 -- [, [Code =>] static_integer_EXPRESSION]);
6907 when Pragma_Import_Exception => Import_Exception : declare
6908 Args : Args_List (1 .. 4);
6909 Names : constant Name_List (1 .. 4) := (
6915 Internal : Node_Id renames Args (1);
6916 External : Node_Id renames Args (2);
6917 Form : Node_Id renames Args (3);
6918 Code : Node_Id renames Args (4);
6921 Gather_Associations (Names, Args);
6923 if Present (External) and then Present (Code) then
6925 ("cannot give both External and Code options for pragma%");
6928 Process_Extended_Import_Export_Exception_Pragma (
6929 Arg_Internal => Internal,
6930 Arg_External => External,
6934 if not Is_VMS_Exception (Entity (Internal)) then
6935 Set_Imported (Entity (Internal));
6937 end Import_Exception;
6939 ---------------------
6940 -- Import_Function --
6941 ---------------------
6943 -- pragma Import_Function (
6944 -- [Internal =>] LOCAL_NAME,
6945 -- [, [External =>] EXTERNAL_SYMBOL]
6946 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6947 -- [, [Result_Type =>] SUBTYPE_MARK]
6948 -- [, [Mechanism =>] MECHANISM]
6949 -- [, [Result_Mechanism =>] MECHANISM_NAME]
6950 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
6952 -- EXTERNAL_SYMBOL ::=
6954 -- | static_string_EXPRESSION
6956 -- PARAMETER_TYPES ::=
6958 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6960 -- TYPE_DESIGNATOR ::=
6962 -- | subtype_Name ' Access
6966 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6968 -- MECHANISM_ASSOCIATION ::=
6969 -- [formal_parameter_NAME =>] MECHANISM_NAME
6971 -- MECHANISM_NAME ::=
6974 -- | Descriptor [([Class =>] CLASS_NAME)]
6976 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6978 when Pragma_Import_Function => Import_Function : declare
6979 Args : Args_List (1 .. 7);
6980 Names : constant Name_List (1 .. 7) := (
6983 Name_Parameter_Types,
6986 Name_Result_Mechanism,
6987 Name_First_Optional_Parameter);
6989 Internal : Node_Id renames Args (1);
6990 External : Node_Id renames Args (2);
6991 Parameter_Types : Node_Id renames Args (3);
6992 Result_Type : Node_Id renames Args (4);
6993 Mechanism : Node_Id renames Args (5);
6994 Result_Mechanism : Node_Id renames Args (6);
6995 First_Optional_Parameter : Node_Id renames Args (7);
6999 Gather_Associations (Names, Args);
7000 Process_Extended_Import_Export_Subprogram_Pragma (
7001 Arg_Internal => Internal,
7002 Arg_External => External,
7003 Arg_Parameter_Types => Parameter_Types,
7004 Arg_Result_Type => Result_Type,
7005 Arg_Mechanism => Mechanism,
7006 Arg_Result_Mechanism => Result_Mechanism,
7007 Arg_First_Optional_Parameter => First_Optional_Parameter);
7008 end Import_Function;
7014 -- pragma Import_Object (
7015 -- [Internal =>] LOCAL_NAME,
7016 -- [, [External =>] EXTERNAL_SYMBOL]
7017 -- [, [Size =>] EXTERNAL_SYMBOL]);
7019 -- EXTERNAL_SYMBOL ::=
7021 -- | static_string_EXPRESSION
7023 when Pragma_Import_Object => Import_Object : declare
7024 Args : Args_List (1 .. 3);
7025 Names : constant Name_List (1 .. 3) := (
7030 Internal : Node_Id renames Args (1);
7031 External : Node_Id renames Args (2);
7032 Size : Node_Id renames Args (3);
7036 Gather_Associations (Names, Args);
7037 Process_Extended_Import_Export_Object_Pragma (
7038 Arg_Internal => Internal,
7039 Arg_External => External,
7043 ----------------------
7044 -- Import_Procedure --
7045 ----------------------
7047 -- pragma Import_Procedure (
7048 -- [Internal =>] LOCAL_NAME,
7049 -- [, [External =>] EXTERNAL_SYMBOL]
7050 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7051 -- [, [Mechanism =>] MECHANISM]
7052 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7054 -- EXTERNAL_SYMBOL ::=
7056 -- | static_string_EXPRESSION
7058 -- PARAMETER_TYPES ::=
7060 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7062 -- TYPE_DESIGNATOR ::=
7064 -- | subtype_Name ' Access
7068 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7070 -- MECHANISM_ASSOCIATION ::=
7071 -- [formal_parameter_NAME =>] MECHANISM_NAME
7073 -- MECHANISM_NAME ::=
7076 -- | Descriptor [([Class =>] CLASS_NAME)]
7078 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7080 when Pragma_Import_Procedure => Import_Procedure : declare
7081 Args : Args_List (1 .. 5);
7082 Names : constant Name_List (1 .. 5) := (
7085 Name_Parameter_Types,
7087 Name_First_Optional_Parameter);
7089 Internal : Node_Id renames Args (1);
7090 External : Node_Id renames Args (2);
7091 Parameter_Types : Node_Id renames Args (3);
7092 Mechanism : Node_Id renames Args (4);
7093 First_Optional_Parameter : Node_Id renames Args (5);
7097 Gather_Associations (Names, Args);
7098 Process_Extended_Import_Export_Subprogram_Pragma (
7099 Arg_Internal => Internal,
7100 Arg_External => External,
7101 Arg_Parameter_Types => Parameter_Types,
7102 Arg_Mechanism => Mechanism,
7103 Arg_First_Optional_Parameter => First_Optional_Parameter);
7104 end Import_Procedure;
7106 -----------------------------
7107 -- Import_Valued_Procedure --
7108 -----------------------------
7110 -- pragma Import_Valued_Procedure (
7111 -- [Internal =>] LOCAL_NAME,
7112 -- [, [External =>] EXTERNAL_SYMBOL]
7113 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7114 -- [, [Mechanism =>] MECHANISM]
7115 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7117 -- EXTERNAL_SYMBOL ::=
7119 -- | static_string_EXPRESSION
7121 -- PARAMETER_TYPES ::=
7123 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7125 -- TYPE_DESIGNATOR ::=
7127 -- | subtype_Name ' Access
7131 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7133 -- MECHANISM_ASSOCIATION ::=
7134 -- [formal_parameter_NAME =>] MECHANISM_NAME
7136 -- MECHANISM_NAME ::=
7139 -- | Descriptor [([Class =>] CLASS_NAME)]
7141 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7143 when Pragma_Import_Valued_Procedure =>
7144 Import_Valued_Procedure : declare
7145 Args : Args_List (1 .. 5);
7146 Names : constant Name_List (1 .. 5) := (
7149 Name_Parameter_Types,
7151 Name_First_Optional_Parameter);
7153 Internal : Node_Id renames Args (1);
7154 External : Node_Id renames Args (2);
7155 Parameter_Types : Node_Id renames Args (3);
7156 Mechanism : Node_Id renames Args (4);
7157 First_Optional_Parameter : Node_Id renames Args (5);
7161 Gather_Associations (Names, Args);
7162 Process_Extended_Import_Export_Subprogram_Pragma (
7163 Arg_Internal => Internal,
7164 Arg_External => External,
7165 Arg_Parameter_Types => Parameter_Types,
7166 Arg_Mechanism => Mechanism,
7167 Arg_First_Optional_Parameter => First_Optional_Parameter);
7168 end Import_Valued_Procedure;
7170 ------------------------
7171 -- Initialize_Scalars --
7172 ------------------------
7174 -- pragma Initialize_Scalars;
7176 when Pragma_Initialize_Scalars =>
7178 Check_Arg_Count (0);
7179 Check_Valid_Configuration_Pragma;
7180 Check_Restriction (No_Initialize_Scalars, N);
7182 if not Restriction_Active (No_Initialize_Scalars) then
7183 Init_Or_Norm_Scalars := True;
7184 Initialize_Scalars := True;
7191 -- pragma Inline ( NAME {, NAME} );
7193 when Pragma_Inline =>
7195 -- Pragma is active if inlining option is active
7197 Process_Inline (Inline_Active);
7203 -- pragma Inline_Always ( NAME {, NAME} );
7205 when Pragma_Inline_Always =>
7206 Process_Inline (True);
7208 --------------------
7209 -- Inline_Generic --
7210 --------------------
7212 -- pragma Inline_Generic (NAME {, NAME});
7214 when Pragma_Inline_Generic =>
7215 Process_Generic_List;
7217 ----------------------
7218 -- Inspection_Point --
7219 ----------------------
7221 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
7223 when Pragma_Inspection_Point => Inspection_Point : declare
7228 if Arg_Count > 0 then
7231 Exp := Expression (Arg);
7234 if not Is_Entity_Name (Exp)
7235 or else not Is_Object (Entity (Exp))
7237 Error_Pragma_Arg ("object name required", Arg);
7244 end Inspection_Point;
7250 -- pragma Interface (
7251 -- [ Convention =>] convention_IDENTIFIER,
7252 -- [ Entity =>] local_NAME
7253 -- [, [External_Name =>] static_string_EXPRESSION ]
7254 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7256 when Pragma_Interface =>
7263 Check_At_Least_N_Arguments (2);
7264 Check_At_Most_N_Arguments (4);
7265 Process_Import_Or_Interface;
7267 --------------------
7268 -- Interface_Name --
7269 --------------------
7271 -- pragma Interface_Name (
7272 -- [ Entity =>] local_NAME
7273 -- [,[External_Name =>] static_string_EXPRESSION ]
7274 -- [,[Link_Name =>] static_string_EXPRESSION ]);
7276 when Pragma_Interface_Name => Interface_Name : declare
7285 ((Name_Entity, Name_External_Name, Name_Link_Name));
7286 Check_At_Least_N_Arguments (2);
7287 Check_At_Most_N_Arguments (3);
7288 Id := Expression (Arg1);
7291 if not Is_Entity_Name (Id) then
7293 ("first argument for pragma% must be entity name", Arg1);
7294 elsif Etype (Id) = Any_Type then
7297 Def_Id := Entity (Id);
7300 -- Special DEC-compatible processing for the object case,
7301 -- forces object to be imported.
7303 if Ekind (Def_Id) = E_Variable then
7304 Kill_Size_Check_Code (Def_Id);
7305 Note_Possible_Modification (Id);
7307 -- Initialization is not allowed for imported variable
7309 if Present (Expression (Parent (Def_Id)))
7310 and then Comes_From_Source (Expression (Parent (Def_Id)))
7312 Error_Msg_Sloc := Sloc (Def_Id);
7314 ("no initialization allowed for declaration of& #",
7318 -- For compatibility, support VADS usage of providing both
7319 -- pragmas Interface and Interface_Name to obtain the effect
7320 -- of a single Import pragma.
7322 if Is_Imported (Def_Id)
7323 and then Present (First_Rep_Item (Def_Id))
7324 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
7325 and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
7329 Set_Imported (Def_Id);
7332 Set_Is_Public (Def_Id);
7333 Process_Interface_Name (Def_Id, Arg2, Arg3);
7336 -- Otherwise must be subprogram
7338 elsif not Is_Subprogram (Def_Id) then
7340 ("argument of pragma% is not subprogram", Arg1);
7343 Check_At_Most_N_Arguments (3);
7347 -- Loop through homonyms
7350 Def_Id := Get_Base_Subprogram (Hom_Id);
7352 if Is_Imported (Def_Id) then
7353 Process_Interface_Name (Def_Id, Arg2, Arg3);
7357 Hom_Id := Homonym (Hom_Id);
7359 exit when No (Hom_Id)
7360 or else Scope (Hom_Id) /= Current_Scope;
7365 ("argument of pragma% is not imported subprogram",
7371 -----------------------
7372 -- Interrupt_Handler --
7373 -----------------------
7375 -- pragma Interrupt_Handler (handler_NAME);
7377 when Pragma_Interrupt_Handler =>
7378 Check_Ada_83_Warning;
7379 Check_Arg_Count (1);
7380 Check_No_Identifiers;
7382 if No_Run_Time_Mode then
7383 Error_Msg_CRT ("Interrupt_Handler pragma", N);
7385 Check_Interrupt_Or_Attach_Handler;
7386 Process_Interrupt_Or_Attach_Handler;
7389 ------------------------
7390 -- Interrupt_Priority --
7391 ------------------------
7393 -- pragma Interrupt_Priority [(EXPRESSION)];
7395 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
7396 P : constant Node_Id := Parent (N);
7400 Check_Ada_83_Warning;
7402 if Arg_Count /= 0 then
7403 Arg := Expression (Arg1);
7404 Check_Arg_Count (1);
7405 Check_No_Identifiers;
7407 -- The expression must be analyzed in the special manner
7408 -- described in "Handling of Default and Per-Object
7409 -- Expressions" in sem.ads.
7411 Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
7414 if Nkind (P) /= N_Task_Definition
7415 and then Nkind (P) /= N_Protected_Definition
7420 elsif Has_Priority_Pragma (P) then
7421 Error_Pragma ("duplicate pragma% not allowed");
7424 Set_Has_Priority_Pragma (P, True);
7425 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7427 end Interrupt_Priority;
7429 ---------------------
7430 -- Interrupt_State --
7431 ---------------------
7433 -- pragma Interrupt_State (
7434 -- [Name =>] INTERRUPT_ID,
7435 -- [State =>] INTERRUPT_STATE);
7437 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
7438 -- INTERRUPT_STATE => System | Runtime | User
7440 -- Note: if the interrupt id is given as an identifier, then
7441 -- it must be one of the identifiers in Ada.Interrupts.Names.
7442 -- Otherwise it is given as a static integer expression which
7443 -- must be in the range of Ada.Interrupts.Interrupt_ID.
7445 when Pragma_Interrupt_State => Interrupt_State : declare
7447 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
7448 -- This is the entity Ada.Interrupts.Interrupt_ID;
7450 State_Type : Character;
7451 -- Set to 's'/'r'/'u' for System/Runtime/User
7454 -- Index to entry in Interrupt_States table
7457 -- Value of interrupt
7459 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
7460 -- The first argument to the pragma
7462 Int_Ent : Entity_Id;
7463 -- Interrupt entity in Ada.Interrupts.Names
7467 Check_Arg_Order ((Name_Name, Name_State));
7468 Check_Arg_Count (2);
7470 Check_Optional_Identifier (Arg1, Name_Name);
7471 Check_Optional_Identifier (Arg2, Name_State);
7472 Check_Arg_Is_Identifier (Arg2);
7474 -- First argument is identifier
7476 if Nkind (Arg1X) = N_Identifier then
7478 -- Search list of names in Ada.Interrupts.Names
7480 Int_Ent := First_Entity (RTE (RE_Names));
7482 if No (Int_Ent) then
7483 Error_Pragma_Arg ("invalid interrupt name", Arg1);
7485 elsif Chars (Int_Ent) = Chars (Arg1X) then
7486 Int_Val := Expr_Value (Constant_Value (Int_Ent));
7490 Next_Entity (Int_Ent);
7493 -- First argument is not an identifier, so it must be a
7494 -- static expression of type Ada.Interrupts.Interrupt_ID.
7497 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
7498 Int_Val := Expr_Value (Arg1X);
7500 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
7502 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
7505 ("value not in range of type " &
7506 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
7512 case Chars (Get_Pragma_Arg (Arg2)) is
7513 when Name_Runtime => State_Type := 'r';
7514 when Name_System => State_Type := 's';
7515 when Name_User => State_Type := 'u';
7518 Error_Pragma_Arg ("invalid interrupt state", Arg2);
7521 -- Check if entry is already stored
7523 IST_Num := Interrupt_States.First;
7525 -- If entry not found, add it
7527 if IST_Num > Interrupt_States.Last then
7528 Interrupt_States.Append
7529 ((Interrupt_Number => UI_To_Int (Int_Val),
7530 Interrupt_State => State_Type,
7531 Pragma_Loc => Loc));
7534 -- Case of entry for the same entry
7536 elsif Int_Val = Interrupt_States.Table (IST_Num).
7539 -- If state matches, done, no need to make redundant entry
7542 State_Type = Interrupt_States.Table (IST_Num).
7545 -- Otherwise if state does not match, error
7548 Interrupt_States.Table (IST_Num).Pragma_Loc;
7550 ("state conflicts with that given #", Arg2);
7554 IST_Num := IST_Num + 1;
7556 end Interrupt_State;
7558 ----------------------
7559 -- Java_Constructor --
7560 ----------------------
7562 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
7564 -- Also handles pragma CIL_Constructor
7566 when Pragma_CIL_Constructor | Pragma_Java_Constructor =>
7567 Java_Constructor : declare
7571 Convention : Convention_Id;
7575 Check_Arg_Count (1);
7576 Check_Optional_Identifier (Arg1, Name_Entity);
7577 Check_Arg_Is_Local_Name (Arg1);
7579 Id := Expression (Arg1);
7580 Find_Program_Unit_Name (Id);
7582 -- If we did not find the name, we are done
7584 if Etype (Id) = Any_Type then
7589 when Pragma_CIL_Constructor => Convention := Convention_CIL;
7590 when Pragma_Java_Constructor => Convention := Convention_Java;
7591 when others => null;
7594 Hom_Id := Entity (Id);
7596 -- Loop through homonyms
7599 Def_Id := Get_Base_Subprogram (Hom_Id);
7601 -- The constructor is required to be a function returning an
7602 -- access type whose designated type has convention Java/CIL.
7604 if Ekind (Def_Id) = E_Function
7606 (Is_Value_Type (Etype (Def_Id))
7608 (Ekind (Etype (Def_Id)) in Access_Kind
7611 (Designated_Type (Etype (Def_Id))) = Convention
7614 (Root_Type (Designated_Type (Etype (Def_Id)))) =
7617 Set_Is_Constructor (Def_Id);
7618 Set_Convention (Def_Id, Convention);
7619 Set_Is_Imported (Def_Id);
7622 if Convention = Convention_Java then
7624 ("pragma% requires function returning a " &
7625 "'Java access type", Arg1);
7627 pragma Assert (Convention = Convention_CIL);
7629 ("pragma% requires function returning a " &
7630 "'CIL access type", Arg1);
7634 Hom_Id := Homonym (Hom_Id);
7636 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
7638 end Java_Constructor;
7640 ----------------------
7641 -- Java_Interface --
7642 ----------------------
7644 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
7646 when Pragma_Java_Interface => Java_Interface : declare
7652 Check_Arg_Count (1);
7653 Check_Optional_Identifier (Arg1, Name_Entity);
7654 Check_Arg_Is_Local_Name (Arg1);
7656 Arg := Expression (Arg1);
7659 if Etype (Arg) = Any_Type then
7663 if not Is_Entity_Name (Arg)
7664 or else not Is_Type (Entity (Arg))
7666 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
7669 Typ := Underlying_Type (Entity (Arg));
7671 -- For now we simply check some of the semantic constraints
7672 -- on the type. This currently leaves out some restrictions
7673 -- on interface types, namely that the parent type must be
7674 -- java.lang.Object.Typ and that all primitives of the type
7675 -- should be declared abstract. ???
7677 if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then
7678 Error_Pragma_Arg ("pragma% requires an abstract "
7679 & "tagged type", Arg1);
7681 elsif not Has_Discriminants (Typ)
7682 or else Ekind (Etype (First_Discriminant (Typ)))
7683 /= E_Anonymous_Access_Type
7685 not Is_Class_Wide_Type
7686 (Designated_Type (Etype (First_Discriminant (Typ))))
7689 ("type must have a class-wide access discriminant", Arg1);
7697 -- pragma Keep_Names ([On => ] local_NAME);
7699 when Pragma_Keep_Names => Keep_Names : declare
7704 Check_Arg_Count (1);
7705 Check_Optional_Identifier (Arg1, Name_On);
7706 Check_Arg_Is_Local_Name (Arg1);
7708 Arg := Expression (Arg1);
7711 if Etype (Arg) = Any_Type then
7715 if not Is_Entity_Name (Arg)
7716 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
7719 ("pragma% requires a local enumeration type", Arg1);
7722 Set_Discard_Names (Entity (Arg), False);
7729 -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
7731 when Pragma_License =>
7733 Check_Arg_Count (1);
7734 Check_No_Identifiers;
7735 Check_Valid_Configuration_Pragma;
7736 Check_Arg_Is_Identifier (Arg1);
7739 Sind : constant Source_File_Index :=
7740 Source_Index (Current_Sem_Unit);
7743 case Chars (Get_Pragma_Arg (Arg1)) is
7745 Set_License (Sind, GPL);
7747 when Name_Modified_GPL =>
7748 Set_License (Sind, Modified_GPL);
7750 when Name_Restricted =>
7751 Set_License (Sind, Restricted);
7753 when Name_Unrestricted =>
7754 Set_License (Sind, Unrestricted);
7757 Error_Pragma_Arg ("invalid license name", Arg1);
7765 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
7767 when Pragma_Link_With => Link_With : declare
7773 if Operating_Mode = Generate_Code
7774 and then In_Extended_Main_Source_Unit (N)
7776 Check_At_Least_N_Arguments (1);
7777 Check_No_Identifiers;
7778 Check_Is_In_Decl_Part_Or_Package_Spec;
7779 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7783 while Present (Arg) loop
7784 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7786 -- Store argument, converting sequences of spaces
7787 -- to a single null character (this is one of the
7788 -- differences in processing between Link_With
7789 -- and Linker_Options).
7792 C : constant Char_Code := Get_Char_Code (' ');
7793 S : constant String_Id :=
7794 Strval (Expr_Value_S (Expression (Arg)));
7795 L : constant Nat := String_Length (S);
7798 procedure Skip_Spaces;
7799 -- Advance F past any spaces
7805 procedure Skip_Spaces is
7807 while F <= L and then Get_String_Char (S, F) = C loop
7812 -- Start of processing for Arg_Store
7815 Skip_Spaces; -- skip leading spaces
7817 -- Loop through characters, changing any embedded
7818 -- sequence of spaces to a single null character
7819 -- (this is how Link_With/Linker_Options differ)
7822 if Get_String_Char (S, F) = C then
7825 Store_String_Char (ASCII.NUL);
7828 Store_String_Char (Get_String_Char (S, F));
7836 if Present (Arg) then
7837 Store_String_Char (ASCII.NUL);
7841 Store_Linker_Option_String (End_String);
7849 -- pragma Linker_Alias (
7850 -- [Entity =>] LOCAL_NAME
7851 -- [Target =>] static_string_EXPRESSION);
7853 when Pragma_Linker_Alias =>
7855 Check_Arg_Order ((Name_Entity, Name_Target));
7856 Check_Arg_Count (2);
7857 Check_Optional_Identifier (Arg1, Name_Entity);
7858 Check_Optional_Identifier (Arg2, Name_Target);
7859 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7860 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7862 -- The only processing required is to link this item on to the
7863 -- list of rep items for the given entity. This is accomplished
7864 -- by the call to Rep_Item_Too_Late (when no error is detected
7865 -- and False is returned).
7867 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7870 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7873 ------------------------
7874 -- Linker_Constructor --
7875 ------------------------
7877 -- pragma Linker_Constructor (procedure_LOCAL_NAME);
7879 -- Code is shared with Linker_Destructor
7881 -----------------------
7882 -- Linker_Destructor --
7883 -----------------------
7885 -- pragma Linker_Destructor (procedure_LOCAL_NAME);
7887 when Pragma_Linker_Constructor |
7888 Pragma_Linker_Destructor =>
7889 Linker_Constructor : declare
7895 Check_Arg_Count (1);
7896 Check_No_Identifiers;
7897 Check_Arg_Is_Local_Name (Arg1);
7898 Arg1_X := Expression (Arg1);
7900 Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
7902 if not Is_Library_Level_Entity (Proc) then
7904 ("argument for pragma% must be library level entity", Arg1);
7907 -- The only processing required is to link this item on to the
7908 -- list of rep items for the given entity. This is accomplished
7909 -- by the call to Rep_Item_Too_Late (when no error is detected
7910 -- and False is returned).
7912 if Rep_Item_Too_Late (Proc, N) then
7915 Set_Has_Gigi_Rep_Item (Proc);
7917 end Linker_Constructor;
7919 --------------------
7920 -- Linker_Options --
7921 --------------------
7923 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
7925 when Pragma_Linker_Options => Linker_Options : declare
7929 Check_Ada_83_Warning;
7930 Check_No_Identifiers;
7931 Check_Arg_Count (1);
7932 Check_Is_In_Decl_Part_Or_Package_Spec;
7934 if Operating_Mode = Generate_Code
7935 and then In_Extended_Main_Source_Unit (N)
7937 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7938 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
7941 while Present (Arg) loop
7942 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7943 Store_String_Char (ASCII.NUL);
7945 (Strval (Expr_Value_S (Expression (Arg))));
7949 Store_Linker_Option_String (End_String);
7953 --------------------
7954 -- Linker_Section --
7955 --------------------
7957 -- pragma Linker_Section (
7958 -- [Entity =>] LOCAL_NAME
7959 -- [Section =>] static_string_EXPRESSION);
7961 when Pragma_Linker_Section =>
7963 Check_Arg_Order ((Name_Entity, Name_Section));
7964 Check_Arg_Count (2);
7965 Check_Optional_Identifier (Arg1, Name_Entity);
7966 Check_Optional_Identifier (Arg2, Name_Section);
7967 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7968 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7970 -- The only processing required is to link this item on to the
7971 -- list of rep items for the given entity. This is accomplished
7972 -- by the call to Rep_Item_Too_Late (when no error is detected
7973 -- and False is returned).
7975 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
7978 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
7985 -- pragma List (On | Off)
7987 -- There is nothing to do here, since we did all the processing
7988 -- for this pragma in Par.Prag (so that it works properly even in
7989 -- syntax only mode)
7994 --------------------
7995 -- Locking_Policy --
7996 --------------------
7998 -- pragma Locking_Policy (policy_IDENTIFIER);
8000 when Pragma_Locking_Policy => declare
8004 Check_Ada_83_Warning;
8005 Check_Arg_Count (1);
8006 Check_No_Identifiers;
8007 Check_Arg_Is_Locking_Policy (Arg1);
8008 Check_Valid_Configuration_Pragma;
8009 Get_Name_String (Chars (Expression (Arg1)));
8010 LP := Fold_Upper (Name_Buffer (1));
8012 if Locking_Policy /= ' '
8013 and then Locking_Policy /= LP
8015 Error_Msg_Sloc := Locking_Policy_Sloc;
8016 Error_Pragma ("locking policy incompatible with policy#");
8018 -- Set new policy, but always preserve System_Location since
8019 -- we like the error message with the run time name.
8022 Locking_Policy := LP;
8024 if Locking_Policy_Sloc /= System_Location then
8025 Locking_Policy_Sloc := Loc;
8034 -- pragma Long_Float (D_Float | G_Float);
8036 when Pragma_Long_Float =>
8038 Check_Valid_Configuration_Pragma;
8039 Check_Arg_Count (1);
8040 Check_No_Identifier (Arg1);
8041 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
8043 if not OpenVMS_On_Target then
8044 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
8049 if Chars (Expression (Arg1)) = Name_D_Float then
8050 if Opt.Float_Format_Long = 'G' then
8051 Error_Pragma ("G_Float previously specified");
8054 Opt.Float_Format_Long := 'D';
8056 -- G_Float case (this is the default, does not need overriding)
8059 if Opt.Float_Format_Long = 'D' then
8060 Error_Pragma ("D_Float previously specified");
8063 Opt.Float_Format_Long := 'G';
8066 Set_Standard_Fpt_Formats;
8068 -----------------------
8069 -- Machine_Attribute --
8070 -----------------------
8072 -- pragma Machine_Attribute (
8073 -- [Entity =>] LOCAL_NAME,
8074 -- [Attribute_Name =>] static_string_EXPRESSION
8075 -- [,[Info =>] static_string_EXPRESSION] );
8077 when Pragma_Machine_Attribute => Machine_Attribute : declare
8082 Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
8084 if Arg_Count = 3 then
8085 Check_Optional_Identifier (Arg3, Name_Info);
8086 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
8088 Check_Arg_Count (2);
8091 Check_Optional_Identifier (Arg1, Name_Entity);
8092 Check_Optional_Identifier (Arg2, Name_Attribute_Name);
8093 Check_Arg_Is_Local_Name (Arg1);
8094 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8095 Def_Id := Entity (Expression (Arg1));
8097 if Is_Access_Type (Def_Id) then
8098 Def_Id := Designated_Type (Def_Id);
8101 if Rep_Item_Too_Early (Def_Id, N) then
8105 Def_Id := Underlying_Type (Def_Id);
8107 -- The only processing required is to link this item on to the
8108 -- list of rep items for the given entity. This is accomplished
8109 -- by the call to Rep_Item_Too_Late (when no error is detected
8110 -- and False is returned).
8112 if Rep_Item_Too_Late (Def_Id, N) then
8115 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8117 end Machine_Attribute;
8124 -- (MAIN_OPTION [, MAIN_OPTION]);
8127 -- [STACK_SIZE =>] static_integer_EXPRESSION
8128 -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION
8129 -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION
8131 when Pragma_Main => Main : declare
8132 Args : Args_List (1 .. 3);
8133 Names : constant Name_List (1 .. 3) := (
8135 Name_Task_Stack_Size_Default,
8136 Name_Time_Slicing_Enabled);
8142 Gather_Associations (Names, Args);
8144 for J in 1 .. 2 loop
8145 if Present (Args (J)) then
8146 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8150 if Present (Args (3)) then
8151 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
8155 while Present (Nod) loop
8156 if Nkind (Nod) = N_Pragma
8157 and then Chars (Nod) = Name_Main
8159 Error_Msg_Name_1 := Chars (N);
8160 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8171 -- pragma Main_Storage
8172 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
8174 -- MAIN_STORAGE_OPTION ::=
8175 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
8176 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
8178 when Pragma_Main_Storage => Main_Storage : declare
8179 Args : Args_List (1 .. 2);
8180 Names : constant Name_List (1 .. 2) := (
8181 Name_Working_Storage,
8188 Gather_Associations (Names, Args);
8190 for J in 1 .. 2 loop
8191 if Present (Args (J)) then
8192 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8196 Check_In_Main_Program;
8199 while Present (Nod) loop
8200 if Nkind (Nod) = N_Pragma
8201 and then Chars (Nod) = Name_Main_Storage
8203 Error_Msg_Name_1 := Chars (N);
8204 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8215 -- pragma Memory_Size (NUMERIC_LITERAL)
8217 when Pragma_Memory_Size =>
8220 -- Memory size is simply ignored
8222 Check_No_Identifiers;
8223 Check_Arg_Count (1);
8224 Check_Arg_Is_Integer_Literal (Arg1);
8232 -- The only correct use of this pragma is on its own in a file, in
8233 -- which case it is specially processed (see Gnat1drv.Check_Bad_Body
8234 -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to
8235 -- check for a file containing nothing but a No_Body pragma). If we
8236 -- attempt to process it during normal semantics processing, it means
8237 -- it was misplaced.
8239 when Pragma_No_Body =>
8240 Error_Pragma ("misplaced pragma %");
8246 -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
8248 when Pragma_No_Return => No_Return : declare
8256 Check_At_Least_N_Arguments (1);
8258 -- Loop through arguments of pragma
8261 while Present (Arg) loop
8262 Check_Arg_Is_Local_Name (Arg);
8263 Id := Expression (Arg);
8266 if not Is_Entity_Name (Id) then
8267 Error_Pragma_Arg ("entity name required", Arg);
8270 if Etype (Id) = Any_Type then
8274 -- Loop to find matching procedures
8279 and then Scope (E) = Current_Scope
8281 if Ekind (E) = E_Procedure
8282 or else Ekind (E) = E_Generic_Procedure
8292 Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
8299 ------------------------
8300 -- No_Strict_Aliasing --
8301 ------------------------
8303 -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
8305 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
8310 Check_At_Most_N_Arguments (1);
8312 if Arg_Count = 0 then
8313 Check_Valid_Configuration_Pragma;
8314 Opt.No_Strict_Aliasing := True;
8317 Check_Optional_Identifier (Arg2, Name_Entity);
8318 Check_Arg_Is_Local_Name (Arg1);
8319 E_Id := Entity (Expression (Arg1));
8321 if E_Id = Any_Type then
8323 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
8324 Error_Pragma_Arg ("pragma% requires access type", Arg1);
8327 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
8329 end No_Strict_Alias;
8335 -- pragma Obsolescent [(
8336 -- [Entity => NAME,]
8337 -- [(static_string_EXPRESSION [, Ada_05])];
8339 when Pragma_Obsolescent => Obsolescent : declare
8343 procedure Set_Obsolescent (E : Entity_Id);
8344 -- Given an entity Ent, mark it as obsolescent if appropriate
8346 ---------------------
8347 -- Set_Obsolescent --
8348 ---------------------
8350 procedure Set_Obsolescent (E : Entity_Id) is
8359 -- Entity name was given
8361 if Present (Ename) then
8363 -- If entity name matches, we are fine
8365 if Chars (Ename) = Chars (Ent) then
8368 -- If entity name does not match, only possibility is an
8369 -- enumeration literal from an enumeration type declaration.
8371 elsif Ekind (Ent) /= E_Enumeration_Type then
8373 ("pragma % entity name does not match declaration");
8376 Ent := First_Literal (E);
8380 ("pragma % entity name does not match any " &
8381 "enumeration literal");
8383 elsif Chars (Ent) = Chars (Ename) then
8387 Ent := Next_Literal (Ent);
8393 -- Ent points to entity to be marked
8395 if Arg_Count >= 1 then
8397 -- Deal with static string argument
8399 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8400 S := Strval (Expression (Arg1));
8402 for J in 1 .. String_Length (S) loop
8403 if not In_Character_Range (Get_String_Char (S, J)) then
8405 ("pragma% argument does not allow wide characters",
8410 Set_Obsolescent_Warning (Ent, Expression (Arg1));
8412 -- Check for Ada_05 parameter
8414 if Arg_Count /= 1 then
8415 Check_Arg_Count (2);
8418 Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
8421 Check_Arg_Is_Identifier (Argx);
8423 if Chars (Argx) /= Name_Ada_05 then
8424 Error_Msg_Name_2 := Name_Ada_05;
8426 ("only allowed argument for pragma% is %", Argx);
8429 if Ada_Version_Explicit < Ada_05
8430 or else not Warn_On_Ada_2005_Compatibility
8438 -- Set flag if pragma active
8441 Set_Is_Obsolescent (Ent);
8445 end Set_Obsolescent;
8447 -- Start of processing for pragma Obsolescent
8452 Check_At_Most_N_Arguments (3);
8454 -- See if first argument specifies an entity name
8457 and then Chars (Arg1) = Name_Entity
8459 Ename := Get_Pragma_Arg (Arg1);
8461 if Nkind (Ename) /= N_Character_Literal
8463 Nkind (Ename) /= N_Identifier
8465 Nkind (Ename) /= N_Operator_Symbol
8467 Error_Pragma_Arg ("entity name expected for pragma%", Arg1);
8470 -- Eliminate first argument, so we can share processing
8474 Arg_Count := Arg_Count - 1;
8476 -- No Entity name argument given
8482 Check_No_Identifiers;
8484 -- Get immediately preceding declaration
8487 while Present (Decl) and then Nkind (Decl) = N_Pragma loop
8491 -- Cases where we do not follow anything other than another pragma
8495 -- First case: library level compilation unit declaration with
8496 -- the pragma immediately following the declaration.
8498 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
8500 (Defining_Entity (Unit (Parent (Parent (N)))));
8503 -- Case 2: library unit placement for package
8507 Ent : constant Entity_Id := Find_Lib_Unit_Name;
8509 if Ekind (Ent) = E_Package
8510 or else Ekind (Ent) = E_Generic_Package
8512 Set_Obsolescent (Ent);
8518 -- Cases where we must follow a declaration
8521 if Nkind (Decl) not in N_Declaration
8522 and then Nkind (Decl) not in N_Later_Decl_Item
8523 and then Nkind (Decl) not in N_Generic_Declaration
8526 ("pragma% misplaced, " &
8527 "must immediately follow a declaration");
8530 Set_Obsolescent (Defining_Entity (Decl));
8540 -- pragma No_Run_Time
8542 -- Note: this pragma is retained for backwards compatibiltiy.
8543 -- See body of Rtsfind for full details on its handling.
8545 when Pragma_No_Run_Time =>
8547 Check_Valid_Configuration_Pragma;
8548 Check_Arg_Count (0);
8550 No_Run_Time_Mode := True;
8551 Configurable_Run_Time_Mode := True;
8554 Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
8557 Duration_32_Bits_On_Target := True;
8561 Set_Restriction (No_Finalization, N);
8562 Set_Restriction (No_Exception_Handlers, N);
8563 Set_Restriction (Max_Tasks, N, 0);
8564 Set_Restriction (No_Tasking, N);
8566 -----------------------
8567 -- Normalize_Scalars --
8568 -----------------------
8570 -- pragma Normalize_Scalars;
8572 when Pragma_Normalize_Scalars =>
8573 Check_Ada_83_Warning;
8574 Check_Arg_Count (0);
8575 Check_Valid_Configuration_Pragma;
8576 Normalize_Scalars := True;
8577 Init_Or_Norm_Scalars := True;
8583 -- pragma Optimize (Time | Space);
8585 -- The actual check for optimize is done in Gigi. Note that this
8586 -- pragma does not actually change the optimization setting, it
8587 -- simply checks that it is consistent with the pragma.
8589 when Pragma_Optimize =>
8590 Check_No_Identifiers;
8591 Check_Arg_Count (1);
8592 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
8598 -- pragma Pack (first_subtype_LOCAL_NAME);
8600 when Pragma_Pack => Pack : declare
8601 Assoc : constant Node_Id := Arg1;
8606 Check_No_Identifiers;
8607 Check_Arg_Count (1);
8608 Check_Arg_Is_Local_Name (Arg1);
8610 Type_Id := Expression (Assoc);
8611 Find_Type (Type_Id);
8612 Typ := Entity (Type_Id);
8615 or else Rep_Item_Too_Early (Typ, N)
8619 Typ := Underlying_Type (Typ);
8622 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
8623 Error_Pragma ("pragma% must specify array or record type");
8626 Check_First_Subtype (Arg1);
8628 if Has_Pragma_Pack (Typ) then
8629 Error_Pragma ("duplicate pragma%, only one allowed");
8633 elsif Is_Array_Type (Typ) then
8635 -- Pack not allowed for aliased or atomic components
8637 if Has_Aliased_Components (Base_Type (Typ)) then
8639 ("pragma% ignored, cannot pack aliased components?");
8641 elsif Has_Atomic_Components (Typ)
8642 or else Is_Atomic (Component_Type (Typ))
8645 ("?pragma% ignored, cannot pack atomic components");
8648 -- If we had an explicit component size given, then we do not
8649 -- let Pack override this given size. We also give a warning
8650 -- that Pack is being ignored unless we can tell for sure that
8651 -- the Pack would not have had any effect anyway.
8653 if Has_Component_Size_Clause (Typ) then
8654 if Known_Static_RM_Size (Component_Type (Typ))
8656 RM_Size (Component_Type (Typ)) = Component_Size (Typ)
8661 ("?pragma% ignored, explicit component size given");
8664 -- If no prior array component size given, Pack is effective
8667 if not Rep_Item_Too_Late (Typ, N) then
8668 if VM_Target = No_VM then
8669 Set_Is_Packed (Base_Type (Typ));
8670 elsif not GNAT_Mode then
8672 ("?pragma% ignored in this configuration");
8675 Set_Has_Pragma_Pack (Base_Type (Typ));
8676 Set_Has_Non_Standard_Rep (Base_Type (Typ));
8680 -- For record types, the pack is always effective
8682 else pragma Assert (Is_Record_Type (Typ));
8683 if not Rep_Item_Too_Late (Typ, N) then
8684 if VM_Target = No_VM then
8685 Set_Is_Packed (Base_Type (Typ));
8686 elsif not GNAT_Mode then
8687 Error_Pragma ("?pragma% ignored in this configuration");
8690 Set_Has_Pragma_Pack (Base_Type (Typ));
8691 Set_Has_Non_Standard_Rep (Base_Type (Typ));
8702 -- There is nothing to do here, since we did all the processing
8703 -- for this pragma in Par.Prag (so that it works properly even in
8704 -- syntax only mode)
8713 -- pragma Passive [(PASSIVE_FORM)];
8715 -- PASSIVE_FORM ::= Semaphore | No
8717 when Pragma_Passive =>
8720 if Nkind (Parent (N)) /= N_Task_Definition then
8721 Error_Pragma ("pragma% must be within task definition");
8724 if Arg_Count /= 0 then
8725 Check_Arg_Count (1);
8726 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
8729 ----------------------------------
8730 -- Preelaborable_Initialization --
8731 ----------------------------------
8733 -- pragma Preelaborable_Initialization (DIRECT_NAME);
8735 when Pragma_Preelaborable_Initialization => Preelab_Init : declare
8740 Check_Arg_Count (1);
8741 Check_No_Identifiers;
8742 Check_Arg_Is_Identifier (Arg1);
8743 Check_Arg_Is_Local_Name (Arg1);
8744 Check_First_Subtype (Arg1);
8745 Ent := Entity (Expression (Arg1));
8747 if not Is_Private_Type (Ent) then
8749 ("pragma % can only be applied to private type", Arg1);
8752 Set_Known_To_Have_Preelab_Init (Ent);
8754 if Has_Pragma_Preelab_Init (Ent)
8755 and then Warn_On_Redundant_Constructs
8757 Error_Pragma ("?duplicate pragma%!");
8759 Set_Has_Pragma_Preelab_Init (Ent);
8767 -- pragma Polling (ON | OFF);
8769 when Pragma_Polling =>
8771 Check_Arg_Count (1);
8772 Check_No_Identifiers;
8773 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
8774 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
8776 --------------------
8777 -- Persistent_BSS --
8778 --------------------
8780 when Pragma_Persistent_BSS => Persistent_BSS : declare
8787 Check_At_Most_N_Arguments (1);
8789 -- Case of application to specific object (one argument)
8791 if Arg_Count = 1 then
8792 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8794 if not Is_Entity_Name (Expression (Arg1))
8796 (Ekind (Entity (Expression (Arg1))) /= E_Variable
8797 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
8799 Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
8802 Ent := Entity (Expression (Arg1));
8803 Decl := Parent (Ent);
8805 if Rep_Item_Too_Late (Ent, N) then
8809 if Present (Expression (Decl)) then
8811 ("object for pragma% cannot have initialization", Arg1);
8814 if not Is_Potentially_Persistent_Type (Etype (Ent)) then
8816 ("object type for pragma% is not potentially persistent",
8821 Make_Linker_Section_Pragma
8822 (Ent, Sloc (N), ".persistent.bss");
8823 Insert_After (N, Prag);
8826 -- Case of use as configuration pragma with no arguments
8829 Check_Valid_Configuration_Pragma;
8830 Persistent_BSS_Mode := True;
8838 -- pragma Preelaborate [(library_unit_NAME)];
8840 -- Set the flag Is_Preelaborated of program unit name entity
8842 when Pragma_Preelaborate => Preelaborate : declare
8843 Pa : constant Node_Id := Parent (N);
8844 Pk : constant Node_Kind := Nkind (Pa);
8848 Check_Ada_83_Warning;
8849 Check_Valid_Library_Unit_Pragma;
8851 if Nkind (N) = N_Null_Statement then
8855 Ent := Find_Lib_Unit_Name;
8857 -- This filters out pragmas inside generic parent then
8858 -- show up inside instantiation
8861 and then not (Pk = N_Package_Specification
8862 and then Present (Generic_Parent (Pa)))
8864 if not Debug_Flag_U then
8865 Set_Is_Preelaborated (Ent);
8866 Set_Suppress_Elaboration_Warnings (Ent);
8871 ---------------------
8872 -- Preelaborate_05 --
8873 ---------------------
8875 -- pragma Preelaborate_05 [(library_unit_NAME)];
8877 -- This pragma is useable only in GNAT_Mode, where it is used like
8878 -- pragma Preelaborate but it is only effective in Ada 2005 mode
8879 -- (otherwise it is ignored). This is used to implement AI-362 which
8880 -- recategorizes some run-time packages in Ada 2005 mode.
8882 when Pragma_Preelaborate_05 => Preelaborate_05 : declare
8887 Check_Valid_Library_Unit_Pragma;
8889 if not GNAT_Mode then
8890 Error_Pragma ("pragma% only available in GNAT mode");
8893 if Nkind (N) = N_Null_Statement then
8897 -- This is one of the few cases where we need to test the value of
8898 -- Ada_Version_Explicit rather than Ada_Version (which is always
8899 -- set to Ada_05 in a predefined unit), we need to know the
8900 -- explicit version set to know if this pragma is active.
8902 if Ada_Version_Explicit >= Ada_05 then
8903 Ent := Find_Lib_Unit_Name;
8904 Set_Is_Preelaborated (Ent);
8905 Set_Suppress_Elaboration_Warnings (Ent);
8907 end Preelaborate_05;
8913 -- pragma Priority (EXPRESSION);
8915 when Pragma_Priority => Priority : declare
8916 P : constant Node_Id := Parent (N);
8920 Check_No_Identifiers;
8921 Check_Arg_Count (1);
8925 if Nkind (P) = N_Subprogram_Body then
8926 Check_In_Main_Program;
8928 Arg := Expression (Arg1);
8929 Analyze_And_Resolve (Arg, Standard_Integer);
8933 if not Is_Static_Expression (Arg) then
8934 Flag_Non_Static_Expr
8935 ("main subprogram priority is not static!", Arg);
8938 -- If constraint error, then we already signalled an error
8940 elsif Raises_Constraint_Error (Arg) then
8943 -- Otherwise check in range
8947 Val : constant Uint := Expr_Value (Arg);
8951 or else Val > Expr_Value (Expression
8952 (Parent (RTE (RE_Max_Priority))))
8955 ("main subprogram priority is out of range", Arg1);
8961 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
8963 -- Load an arbitrary entity from System.Tasking to make sure
8964 -- this package is implicitly with'ed, since we need to have
8965 -- the tasking run-time active for the pragma Priority to have
8969 Discard : Entity_Id;
8970 pragma Warnings (Off, Discard);
8972 Discard := RTE (RE_Task_List);
8975 -- Task or Protected, must be of type Integer
8977 elsif Nkind (P) = N_Protected_Definition
8979 Nkind (P) = N_Task_Definition
8981 Arg := Expression (Arg1);
8983 -- The expression must be analyzed in the special manner
8984 -- described in "Handling of Default and Per-Object
8985 -- Expressions" in sem.ads.
8987 Analyze_Per_Use_Expression (Arg, Standard_Integer);
8989 if not Is_Static_Expression (Arg) then
8990 Check_Restriction (Static_Priorities, Arg);
8993 -- Anything else is incorrect
8999 if Has_Priority_Pragma (P) then
9000 Error_Pragma ("duplicate pragma% not allowed");
9002 Set_Has_Priority_Pragma (P, True);
9004 if Nkind (P) = N_Protected_Definition
9006 Nkind (P) = N_Task_Definition
9008 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9009 -- exp_ch9 should use this ???
9014 -----------------------------------
9015 -- Priority_Specific_Dispatching --
9016 -----------------------------------
9018 -- pragma Priority_Specific_Dispatching (
9019 -- policy_IDENTIFIER,
9020 -- first_priority_EXPRESSION,
9021 -- last_priority_EXPRESSION);
9023 when Pragma_Priority_Specific_Dispatching =>
9024 Priority_Specific_Dispatching : declare
9025 Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
9026 -- This is the entity System.Any_Priority;
9029 Lower_Bound : Node_Id;
9030 Upper_Bound : Node_Id;
9036 Check_Arg_Count (3);
9037 Check_No_Identifiers;
9038 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9039 Check_Valid_Configuration_Pragma;
9040 Get_Name_String (Chars (Expression (Arg1)));
9041 DP := Fold_Upper (Name_Buffer (1));
9043 Lower_Bound := Expression (Arg2);
9044 Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
9045 Lower_Val := Expr_Value (Lower_Bound);
9047 Upper_Bound := Expression (Arg3);
9048 Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
9049 Upper_Val := Expr_Value (Upper_Bound);
9051 -- It is not allowed to use Task_Dispatching_Policy and
9052 -- Priority_Specific_Dispatching in the same partition.
9054 if Task_Dispatching_Policy /= ' ' then
9055 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9057 ("pragma% incompatible with Task_Dispatching_Policy#");
9059 -- Check lower bound in range
9061 elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9063 Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
9066 ("first_priority is out of range", Arg2);
9068 -- Check upper bound in range
9070 elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9072 Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
9075 ("last_priority is out of range", Arg3);
9077 -- Check that the priority range is valid
9079 elsif Lower_Val > Upper_Val then
9081 ("last_priority_expression must be greater than" &
9082 " or equal to first_priority_expression");
9084 -- Store the new policy, but always preserve System_Location since
9085 -- we like the error message with the run-time name.
9088 -- Check overlapping in the priority ranges specified in other
9089 -- Priority_Specific_Dispatching pragmas within the same
9090 -- partition. We can only check those we know about!
9093 Specific_Dispatching.First .. Specific_Dispatching.Last
9095 if Specific_Dispatching.Table (J).First_Priority in
9096 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9097 or else Specific_Dispatching.Table (J).Last_Priority in
9098 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9101 Specific_Dispatching.Table (J).Pragma_Loc;
9103 ("priority range overlaps with "
9104 & "Priority_Specific_Dispatching#");
9108 -- The use of Priority_Specific_Dispatching is incompatible
9109 -- with Task_Dispatching_Policy.
9111 if Task_Dispatching_Policy /= ' ' then
9112 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9114 ("Priority_Specific_Dispatching incompatible "
9115 & "with Task_Dispatching_Policy#");
9118 -- The use of Priority_Specific_Dispatching forces ceiling
9121 if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
9122 Error_Msg_Sloc := Locking_Policy_Sloc;
9124 ("Priority_Specific_Dispatching incompatible "
9125 & "with Locking_Policy#");
9127 -- Set the Ceiling_Locking policy, but preserve System_Location
9128 -- since we like the error message with the run time name.
9131 Locking_Policy := 'C';
9133 if Locking_Policy_Sloc /= System_Location then
9134 Locking_Policy_Sloc := Loc;
9138 -- Add entry in the table
9140 Specific_Dispatching.Append
9141 ((Dispatching_Policy => DP,
9142 First_Priority => UI_To_Int (Lower_Val),
9143 Last_Priority => UI_To_Int (Upper_Val),
9144 Pragma_Loc => Loc));
9146 end Priority_Specific_Dispatching;
9152 -- pragma Profile (profile_IDENTIFIER);
9154 -- profile_IDENTIFIER => Protected | Ravenscar
9156 when Pragma_Profile =>
9158 Check_Arg_Count (1);
9159 Check_Valid_Configuration_Pragma;
9160 Check_No_Identifiers;
9163 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9165 if Chars (Argx) = Name_Ravenscar then
9166 Set_Ravenscar_Profile (N);
9167 elsif Chars (Argx) = Name_Restricted then
9168 Set_Profile_Restrictions (Restricted, N, Warn => False);
9170 Error_Pragma_Arg ("& is not a valid profile", Argx);
9174 ----------------------
9175 -- Profile_Warnings --
9176 ----------------------
9178 -- pragma Profile_Warnings (profile_IDENTIFIER);
9180 -- profile_IDENTIFIER => Protected | Ravenscar
9182 when Pragma_Profile_Warnings =>
9184 Check_Arg_Count (1);
9185 Check_Valid_Configuration_Pragma;
9186 Check_No_Identifiers;
9189 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9191 if Chars (Argx) = Name_Ravenscar then
9192 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
9193 elsif Chars (Argx) = Name_Restricted then
9194 Set_Profile_Restrictions (Restricted, N, Warn => True);
9196 Error_Pragma_Arg ("& is not a valid profile", Argx);
9200 --------------------------
9201 -- Propagate_Exceptions --
9202 --------------------------
9204 -- pragma Propagate_Exceptions;
9206 -- Note: this pragma is obsolete and has no effect
9208 when Pragma_Propagate_Exceptions =>
9210 Check_Arg_Count (0);
9212 if In_Extended_Main_Source_Unit (N) then
9213 Propagate_Exceptions := True;
9220 -- pragma Psect_Object (
9221 -- [Internal =>] LOCAL_NAME,
9222 -- [, [External =>] EXTERNAL_SYMBOL]
9223 -- [, [Size =>] EXTERNAL_SYMBOL]);
9225 when Pragma_Psect_Object | Pragma_Common_Object =>
9226 Psect_Object : declare
9227 Args : Args_List (1 .. 3);
9228 Names : constant Name_List (1 .. 3) := (
9233 Internal : Node_Id renames Args (1);
9234 External : Node_Id renames Args (2);
9235 Size : Node_Id renames Args (3);
9239 procedure Check_Too_Long (Arg : Node_Id);
9240 -- Posts message if the argument is an identifier with more
9241 -- than 31 characters, or a string literal with more than
9242 -- 31 characters, and we are operating under VMS
9244 --------------------
9245 -- Check_Too_Long --
9246 --------------------
9248 procedure Check_Too_Long (Arg : Node_Id) is
9249 X : constant Node_Id := Original_Node (Arg);
9252 if Nkind (X) /= N_String_Literal
9254 Nkind (X) /= N_Identifier
9257 ("inappropriate argument for pragma %", Arg);
9260 if OpenVMS_On_Target then
9261 if (Nkind (X) = N_String_Literal
9262 and then String_Length (Strval (X)) > 31)
9264 (Nkind (X) = N_Identifier
9265 and then Length_Of_Name (Chars (X)) > 31)
9268 ("argument for pragma % is longer than 31 characters",
9274 -- Start of processing for Common_Object/Psect_Object
9278 Gather_Associations (Names, Args);
9279 Process_Extended_Import_Export_Internal_Arg (Internal);
9281 Def_Id := Entity (Internal);
9283 if Ekind (Def_Id) /= E_Constant
9284 and then Ekind (Def_Id) /= E_Variable
9287 ("pragma% must designate an object", Internal);
9290 Check_Too_Long (Internal);
9292 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
9294 ("cannot use pragma% for imported/exported object",
9298 if Is_Concurrent_Type (Etype (Internal)) then
9300 ("cannot specify pragma % for task/protected object",
9304 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
9306 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
9308 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
9311 if Ekind (Def_Id) = E_Constant then
9313 ("cannot specify pragma % for a constant", Internal);
9316 if Is_Record_Type (Etype (Internal)) then
9322 Ent := First_Entity (Etype (Internal));
9323 while Present (Ent) loop
9324 Decl := Declaration_Node (Ent);
9326 if Ekind (Ent) = E_Component
9327 and then Nkind (Decl) = N_Component_Declaration
9328 and then Present (Expression (Decl))
9329 and then Warn_On_Export_Import
9332 ("?object for pragma % has defaults", Internal);
9342 if Present (Size) then
9343 Check_Too_Long (Size);
9346 if Present (External) then
9347 Check_Arg_Is_External_Name (External);
9348 Check_Too_Long (External);
9351 -- If all error tests pass, link pragma on to the rep item chain
9353 Record_Rep_Item (Def_Id, N);
9360 -- pragma Pure [(library_unit_NAME)];
9362 when Pragma_Pure => Pure : declare
9366 Check_Ada_83_Warning;
9367 Check_Valid_Library_Unit_Pragma;
9369 if Nkind (N) = N_Null_Statement then
9373 Ent := Find_Lib_Unit_Name;
9375 Set_Has_Pragma_Pure (Ent);
9376 Set_Suppress_Elaboration_Warnings (Ent);
9383 -- pragma Pure_05 [(library_unit_NAME)];
9385 -- This pragma is useable only in GNAT_Mode, where it is used like
9386 -- pragma Pure but it is only effective in Ada 2005 mode (otherwise
9387 -- it is ignored). It may be used after a pragma Preelaborate, in
9388 -- which case it overrides the effect of the pragma Preelaborate.
9389 -- This is used to implement AI-362 which recategorizes some run-time
9390 -- packages in Ada 2005 mode.
9392 when Pragma_Pure_05 => Pure_05 : declare
9397 Check_Valid_Library_Unit_Pragma;
9399 if not GNAT_Mode then
9400 Error_Pragma ("pragma% only available in GNAT mode");
9402 if Nkind (N) = N_Null_Statement then
9406 -- This is one of the few cases where we need to test the value of
9407 -- Ada_Version_Explicit rather than Ada_Version (which is always
9408 -- set to Ada_05 in a predefined unit), we need to know the
9409 -- explicit version set to know if this pragma is active.
9411 if Ada_Version_Explicit >= Ada_05 then
9412 Ent := Find_Lib_Unit_Name;
9413 Set_Is_Preelaborated (Ent, False);
9415 Set_Suppress_Elaboration_Warnings (Ent);
9423 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
9425 when Pragma_Pure_Function => Pure_Function : declare
9429 Effective : Boolean := False;
9433 Check_Arg_Count (1);
9434 Check_Optional_Identifier (Arg1, Name_Entity);
9435 Check_Arg_Is_Local_Name (Arg1);
9436 E_Id := Expression (Arg1);
9438 if Error_Posted (E_Id) then
9442 -- Loop through homonyms (overloadings) of referenced entity
9448 Def_Id := Get_Base_Subprogram (E);
9450 if Ekind (Def_Id) /= E_Function
9451 and then Ekind (Def_Id) /= E_Generic_Function
9452 and then Ekind (Def_Id) /= E_Operator
9455 ("pragma% requires a function name", Arg1);
9458 Set_Is_Pure (Def_Id);
9460 if not Has_Pragma_Pure_Function (Def_Id) then
9461 Set_Has_Pragma_Pure_Function (Def_Id);
9466 exit when No (E) or else Scope (E) /= Current_Scope;
9470 and then Warn_On_Redundant_Constructs
9472 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
9478 --------------------
9479 -- Queuing_Policy --
9480 --------------------
9482 -- pragma Queuing_Policy (policy_IDENTIFIER);
9484 when Pragma_Queuing_Policy => declare
9488 Check_Ada_83_Warning;
9489 Check_Arg_Count (1);
9490 Check_No_Identifiers;
9491 Check_Arg_Is_Queuing_Policy (Arg1);
9492 Check_Valid_Configuration_Pragma;
9493 Get_Name_String (Chars (Expression (Arg1)));
9494 QP := Fold_Upper (Name_Buffer (1));
9496 if Queuing_Policy /= ' '
9497 and then Queuing_Policy /= QP
9499 Error_Msg_Sloc := Queuing_Policy_Sloc;
9500 Error_Pragma ("queuing policy incompatible with policy#");
9502 -- Set new policy, but always preserve System_Location since
9503 -- we like the error message with the run time name.
9506 Queuing_Policy := QP;
9508 if Queuing_Policy_Sloc /= System_Location then
9509 Queuing_Policy_Sloc := Loc;
9514 ---------------------------
9515 -- Remote_Call_Interface --
9516 ---------------------------
9518 -- pragma Remote_Call_Interface [(library_unit_NAME)];
9520 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
9521 Cunit_Node : Node_Id;
9522 Cunit_Ent : Entity_Id;
9526 Check_Ada_83_Warning;
9527 Check_Valid_Library_Unit_Pragma;
9529 if Nkind (N) = N_Null_Statement then
9533 Cunit_Node := Cunit (Current_Sem_Unit);
9534 K := Nkind (Unit (Cunit_Node));
9535 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
9537 if K = N_Package_Declaration
9538 or else K = N_Generic_Package_Declaration
9539 or else K = N_Subprogram_Declaration
9540 or else K = N_Generic_Subprogram_Declaration
9541 or else (K = N_Subprogram_Body
9542 and then Acts_As_Spec (Unit (Cunit_Node)))
9547 "pragma% must apply to package or subprogram declaration");
9550 Set_Is_Remote_Call_Interface (Cunit_Ent);
9551 end Remote_Call_Interface;
9557 -- pragma Remote_Types [(library_unit_NAME)];
9559 when Pragma_Remote_Types => Remote_Types : declare
9560 Cunit_Node : Node_Id;
9561 Cunit_Ent : Entity_Id;
9564 Check_Ada_83_Warning;
9565 Check_Valid_Library_Unit_Pragma;
9567 if Nkind (N) = N_Null_Statement then
9571 Cunit_Node := Cunit (Current_Sem_Unit);
9572 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
9574 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
9576 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
9579 "pragma% can only apply to a package declaration");
9582 Set_Is_Remote_Types (Cunit_Ent);
9589 -- pragma Ravenscar;
9591 when Pragma_Ravenscar =>
9593 Check_Arg_Count (0);
9594 Check_Valid_Configuration_Pragma;
9595 Set_Ravenscar_Profile (N);
9597 if Warn_On_Obsolescent_Feature then
9599 ("pragma Ravenscar is an obsolescent feature?", N);
9601 ("|use pragma Profile (Ravenscar) instead", N);
9604 -------------------------
9605 -- Restricted_Run_Time --
9606 -------------------------
9608 -- pragma Restricted_Run_Time;
9610 when Pragma_Restricted_Run_Time =>
9612 Check_Arg_Count (0);
9613 Check_Valid_Configuration_Pragma;
9614 Set_Profile_Restrictions (Restricted, N, Warn => False);
9616 if Warn_On_Obsolescent_Feature then
9618 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
9620 ("|use pragma Profile (Restricted) instead", N);
9627 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
9630 -- restriction_IDENTIFIER
9631 -- | restriction_parameter_IDENTIFIER => EXPRESSION
9633 when Pragma_Restrictions =>
9634 Process_Restrictions_Or_Restriction_Warnings (Warn => False);
9636 --------------------------
9637 -- Restriction_Warnings --
9638 --------------------------
9640 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
9643 -- restriction_IDENTIFIER
9644 -- | restriction_parameter_IDENTIFIER => EXPRESSION
9646 when Pragma_Restriction_Warnings =>
9647 Process_Restrictions_Or_Restriction_Warnings (Warn => True);
9653 -- pragma Reviewable;
9655 when Pragma_Reviewable =>
9656 Check_Ada_83_Warning;
9657 Check_Arg_Count (0);
9664 -- pragma Share_Generic (NAME {, NAME});
9666 when Pragma_Share_Generic =>
9668 Process_Generic_List;
9674 -- pragma Shared (LOCAL_NAME);
9676 when Pragma_Shared =>
9678 Process_Atomic_Shared_Volatile;
9680 --------------------
9681 -- Shared_Passive --
9682 --------------------
9684 -- pragma Shared_Passive [(library_unit_NAME)];
9686 -- Set the flag Is_Shared_Passive of program unit name entity
9688 when Pragma_Shared_Passive => Shared_Passive : declare
9689 Cunit_Node : Node_Id;
9690 Cunit_Ent : Entity_Id;
9693 Check_Ada_83_Warning;
9694 Check_Valid_Library_Unit_Pragma;
9696 if Nkind (N) = N_Null_Statement then
9700 Cunit_Node := Cunit (Current_Sem_Unit);
9701 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
9703 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
9705 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
9708 "pragma% can only apply to a package declaration");
9711 Set_Is_Shared_Passive (Cunit_Ent);
9714 ----------------------
9715 -- Source_File_Name --
9716 ----------------------
9718 -- There are five forms for this pragma:
9720 -- pragma Source_File_Name (
9721 -- [UNIT_NAME =>] unit_NAME,
9722 -- BODY_FILE_NAME => STRING_LITERAL
9723 -- [, [INDEX =>] INTEGER_LITERAL]);
9725 -- pragma Source_File_Name (
9726 -- [UNIT_NAME =>] unit_NAME,
9727 -- SPEC_FILE_NAME => STRING_LITERAL
9728 -- [, [INDEX =>] INTEGER_LITERAL]);
9730 -- pragma Source_File_Name (
9731 -- BODY_FILE_NAME => STRING_LITERAL
9732 -- [, DOT_REPLACEMENT => STRING_LITERAL]
9733 -- [, CASING => CASING_SPEC]);
9735 -- pragma Source_File_Name (
9736 -- SPEC_FILE_NAME => STRING_LITERAL
9737 -- [, DOT_REPLACEMENT => STRING_LITERAL]
9738 -- [, CASING => CASING_SPEC]);
9740 -- pragma Source_File_Name (
9741 -- SUBUNIT_FILE_NAME => STRING_LITERAL
9742 -- [, DOT_REPLACEMENT => STRING_LITERAL]
9743 -- [, CASING => CASING_SPEC]);
9745 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
9747 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
9748 -- Source_File_Name (SFN), however their usage is exclusive:
9749 -- SFN can only be used when no project file is used, while
9750 -- SFNP can only be used when a project file is used.
9752 -- No processing here. Processing was completed during parsing,
9753 -- since we need to have file names set as early as possible.
9754 -- Units are loaded well before semantic processing starts.
9756 -- The only processing we defer to this point is the check
9757 -- for correct placement.
9759 when Pragma_Source_File_Name =>
9761 Check_Valid_Configuration_Pragma;
9763 ------------------------------
9764 -- Source_File_Name_Project --
9765 ------------------------------
9767 -- See Source_File_Name for syntax
9769 -- No processing here. Processing was completed during parsing,
9770 -- since we need to have file names set as early as possible.
9771 -- Units are loaded well before semantic processing starts.
9773 -- The only processing we defer to this point is the check
9774 -- for correct placement.
9776 when Pragma_Source_File_Name_Project =>
9778 Check_Valid_Configuration_Pragma;
9780 -- Check that a pragma Source_File_Name_Project is used only
9781 -- in a configuration pragmas file.
9783 -- Pragmas Source_File_Name_Project should only be generated
9784 -- by the Project Manager in configuration pragmas files.
9786 -- This is really an ugly test. It seems to depend on some
9787 -- accidental and undocumented property. At the very least
9788 -- it needs to be documented, but it would be better to have
9789 -- a clean way of testing if we are in a configuration file???
9791 if Present (Parent (N)) then
9793 ("pragma% can only appear in a configuration pragmas file");
9796 ----------------------
9797 -- Source_Reference --
9798 ----------------------
9800 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
9802 -- Nothing to do, all processing completed in Par.Prag, since we
9803 -- need the information for possible parser messages that are output
9805 when Pragma_Source_Reference =>
9808 --------------------------------
9809 -- Static_Elaboration_Desired --
9810 --------------------------------
9812 -- pragma Static_Elaboration_Desired (DIRECT_NAME);
9814 when Pragma_Static_Elaboration_Desired =>
9816 Check_At_Most_N_Arguments (1);
9818 if Is_Compilation_Unit (Current_Scope)
9819 and then Ekind (Current_Scope) = E_Package
9821 Set_Static_Elaboration_Desired (Current_Scope, True);
9823 Error_Pragma ("pragma% must apply to a library-level package");
9830 -- pragma Storage_Size (EXPRESSION);
9832 when Pragma_Storage_Size => Storage_Size : declare
9833 P : constant Node_Id := Parent (N);
9837 Check_No_Identifiers;
9838 Check_Arg_Count (1);
9840 -- The expression must be analyzed in the special manner
9841 -- described in "Handling of Default Expressions" in sem.ads.
9843 -- Set In_Default_Expression for per-object case ???
9845 Arg := Expression (Arg1);
9846 Analyze_Per_Use_Expression (Arg, Any_Integer);
9848 if not Is_Static_Expression (Arg) then
9849 Check_Restriction (Static_Storage_Size, Arg);
9852 if Nkind (P) /= N_Task_Definition then
9857 if Has_Storage_Size_Pragma (P) then
9858 Error_Pragma ("duplicate pragma% not allowed");
9860 Set_Has_Storage_Size_Pragma (P, True);
9863 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9864 -- ??? exp_ch9 should use this!
9872 -- pragma Storage_Unit (NUMERIC_LITERAL);
9874 -- Only permitted argument is System'Storage_Unit value
9876 when Pragma_Storage_Unit =>
9877 Check_No_Identifiers;
9878 Check_Arg_Count (1);
9879 Check_Arg_Is_Integer_Literal (Arg1);
9881 if Intval (Expression (Arg1)) /=
9882 UI_From_Int (Ttypes.System_Storage_Unit)
9884 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
9886 ("the only allowed argument for pragma% is ^", Arg1);
9889 --------------------
9890 -- Stream_Convert --
9891 --------------------
9893 -- pragma Stream_Convert (
9894 -- [Entity =>] type_LOCAL_NAME,
9895 -- [Read =>] function_NAME,
9896 -- [Write =>] function NAME);
9898 when Pragma_Stream_Convert => Stream_Convert : declare
9900 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
9901 -- Check that the given argument is the name of a local
9902 -- function of one argument that is not overloaded earlier
9903 -- in the current local scope. A check is also made that the
9904 -- argument is a function with one parameter.
9906 --------------------------------------
9907 -- Check_OK_Stream_Convert_Function --
9908 --------------------------------------
9910 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
9914 Check_Arg_Is_Local_Name (Arg);
9915 Ent := Entity (Expression (Arg));
9917 if Has_Homonym (Ent) then
9919 ("argument for pragma% may not be overloaded", Arg);
9922 if Ekind (Ent) /= E_Function
9923 or else No (First_Formal (Ent))
9924 or else Present (Next_Formal (First_Formal (Ent)))
9927 ("argument for pragma% must be" &
9928 " function of one argument", Arg);
9930 end Check_OK_Stream_Convert_Function;
9932 -- Start of procecessing for Stream_Convert
9936 Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
9937 Check_Arg_Count (3);
9938 Check_Optional_Identifier (Arg1, Name_Entity);
9939 Check_Optional_Identifier (Arg2, Name_Read);
9940 Check_Optional_Identifier (Arg3, Name_Write);
9941 Check_Arg_Is_Local_Name (Arg1);
9942 Check_OK_Stream_Convert_Function (Arg2);
9943 Check_OK_Stream_Convert_Function (Arg3);
9946 Typ : constant Entity_Id :=
9947 Underlying_Type (Entity (Expression (Arg1)));
9948 Read : constant Entity_Id := Entity (Expression (Arg2));
9949 Write : constant Entity_Id := Entity (Expression (Arg3));
9952 if Etype (Typ) = Any_Type
9954 Etype (Read) = Any_Type
9956 Etype (Write) = Any_Type
9961 Check_First_Subtype (Arg1);
9963 if Rep_Item_Too_Early (Typ, N)
9965 Rep_Item_Too_Late (Typ, N)
9970 if Underlying_Type (Etype (Read)) /= Typ then
9972 ("incorrect return type for function&", Arg2);
9975 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
9977 ("incorrect parameter type for function&", Arg3);
9980 if Underlying_Type (Etype (First_Formal (Read))) /=
9981 Underlying_Type (Etype (Write))
9984 ("result type of & does not match Read parameter type",
9990 -------------------------
9991 -- Style_Checks (GNAT) --
9992 -------------------------
9994 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
9996 -- This is processed by the parser since some of the style
9997 -- checks take place during source scanning and parsing. This
9998 -- means that we don't need to issue error messages here.
10000 when Pragma_Style_Checks => Style_Checks : declare
10001 A : constant Node_Id := Expression (Arg1);
10007 Check_No_Identifiers;
10009 -- Two argument form
10011 if Arg_Count = 2 then
10012 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
10019 E_Id := Expression (Arg2);
10022 if not Is_Entity_Name (E_Id) then
10024 ("second argument of pragma% must be entity name",
10028 E := Entity (E_Id);
10034 Set_Suppress_Style_Checks (E,
10035 (Chars (Expression (Arg1)) = Name_Off));
10036 exit when No (Homonym (E));
10042 -- One argument form
10045 Check_Arg_Count (1);
10047 if Nkind (A) = N_String_Literal then
10051 Slen : constant Natural := Natural (String_Length (S));
10052 Options : String (1 .. Slen);
10058 C := Get_String_Char (S, Int (J));
10059 exit when not In_Character_Range (C);
10060 Options (J) := Get_Character (C);
10062 -- If at end of string, set options. As per discussion
10063 -- above, no need to check for errors, since we issued
10064 -- them in the parser.
10067 Set_Style_Check_Options (Options);
10075 elsif Nkind (A) = N_Identifier then
10076 if Chars (A) = Name_All_Checks then
10077 Set_Default_Style_Check_Options;
10079 elsif Chars (A) = Name_On then
10080 Style_Check := True;
10082 elsif Chars (A) = Name_Off then
10083 Style_Check := False;
10093 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
10095 when Pragma_Subtitle =>
10097 Check_Arg_Count (1);
10098 Check_Optional_Identifier (Arg1, Name_Subtitle);
10099 Check_Arg_Is_String_Literal (Arg1);
10105 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
10107 when Pragma_Suppress =>
10108 Process_Suppress_Unsuppress (True);
10114 -- pragma Suppress_All;
10116 -- The only check made here is that the pragma appears in the
10117 -- proper place, i.e. following a compilation unit. If indeed
10118 -- it appears in this context, then the parser has already
10119 -- inserted an equivalent pragma Suppress (All_Checks) to get
10120 -- the required effect.
10122 when Pragma_Suppress_All =>
10124 Check_Arg_Count (0);
10126 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
10127 or else not Is_List_Member (N)
10128 or else List_Containing (N) /= Pragmas_After (Parent (N))
10131 ("misplaced pragma%, must follow compilation unit");
10134 -------------------------
10135 -- Suppress_Debug_Info --
10136 -------------------------
10138 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
10140 when Pragma_Suppress_Debug_Info =>
10142 Check_Arg_Count (1);
10143 Check_Optional_Identifier (Arg1, Name_Entity);
10144 Check_Arg_Is_Local_Name (Arg1);
10145 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
10147 ----------------------------------
10148 -- Suppress_Exception_Locations --
10149 ----------------------------------
10151 -- pragma Suppress_Exception_Locations;
10153 when Pragma_Suppress_Exception_Locations =>
10155 Check_Arg_Count (0);
10156 Check_Valid_Configuration_Pragma;
10157 Exception_Locations_Suppressed := True;
10159 -----------------------------
10160 -- Suppress_Initialization --
10161 -----------------------------
10163 -- pragma Suppress_Initialization ([Entity =>] type_Name);
10165 when Pragma_Suppress_Initialization => Suppress_Init : declare
10171 Check_Arg_Count (1);
10172 Check_Optional_Identifier (Arg1, Name_Entity);
10173 Check_Arg_Is_Local_Name (Arg1);
10175 E_Id := Expression (Arg1);
10177 if Etype (E_Id) = Any_Type then
10181 E := Entity (E_Id);
10183 if Is_Type (E) then
10184 if Is_Incomplete_Or_Private_Type (E) then
10185 if No (Full_View (Base_Type (E))) then
10187 ("argument of pragma% cannot be an incomplete type",
10190 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
10193 Set_Suppress_Init_Proc (Base_Type (E));
10198 ("pragma% requires argument that is a type name", Arg1);
10206 -- pragma System_Name (DIRECT_NAME);
10208 -- Syntax check: one argument, which must be the identifier GNAT
10209 -- or the identifier GCC, no other identifiers are acceptable.
10211 when Pragma_System_Name =>
10212 Check_No_Identifiers;
10213 Check_Arg_Count (1);
10214 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
10216 -----------------------------
10217 -- Task_Dispatching_Policy --
10218 -----------------------------
10220 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
10222 when Pragma_Task_Dispatching_Policy => declare
10226 Check_Ada_83_Warning;
10227 Check_Arg_Count (1);
10228 Check_No_Identifiers;
10229 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
10230 Check_Valid_Configuration_Pragma;
10231 Get_Name_String (Chars (Expression (Arg1)));
10232 DP := Fold_Upper (Name_Buffer (1));
10234 if Task_Dispatching_Policy /= ' '
10235 and then Task_Dispatching_Policy /= DP
10237 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
10239 ("task dispatching policy incompatible with policy#");
10241 -- Set new policy, but always preserve System_Location since
10242 -- we like the error message with the run time name.
10245 Task_Dispatching_Policy := DP;
10247 if Task_Dispatching_Policy_Sloc /= System_Location then
10248 Task_Dispatching_Policy_Sloc := Loc;
10257 -- pragma Task_Info (EXPRESSION);
10259 when Pragma_Task_Info => Task_Info : declare
10260 P : constant Node_Id := Parent (N);
10265 if Nkind (P) /= N_Task_Definition then
10266 Error_Pragma ("pragma% must appear in task definition");
10269 Check_No_Identifiers;
10270 Check_Arg_Count (1);
10272 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
10274 if Etype (Expression (Arg1)) = Any_Type then
10278 if Has_Task_Info_Pragma (P) then
10279 Error_Pragma ("duplicate pragma% not allowed");
10281 Set_Has_Task_Info_Pragma (P, True);
10289 -- pragma Task_Name (string_EXPRESSION);
10291 when Pragma_Task_Name => Task_Name : declare
10292 -- pragma Priority (EXPRESSION);
10294 P : constant Node_Id := Parent (N);
10298 Check_No_Identifiers;
10299 Check_Arg_Count (1);
10301 Arg := Expression (Arg1);
10302 Analyze_And_Resolve (Arg, Standard_String);
10304 if Nkind (P) /= N_Task_Definition then
10308 if Has_Task_Name_Pragma (P) then
10309 Error_Pragma ("duplicate pragma% not allowed");
10311 Set_Has_Task_Name_Pragma (P, True);
10312 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10320 -- pragma Task_Storage (
10321 -- [Task_Type =>] LOCAL_NAME,
10322 -- [Top_Guard =>] static_integer_EXPRESSION);
10324 when Pragma_Task_Storage => Task_Storage : declare
10325 Args : Args_List (1 .. 2);
10326 Names : constant Name_List (1 .. 2) := (
10330 Task_Type : Node_Id renames Args (1);
10331 Top_Guard : Node_Id renames Args (2);
10337 Gather_Associations (Names, Args);
10339 if No (Task_Type) then
10341 ("missing task_type argument for pragma%");
10344 Check_Arg_Is_Local_Name (Task_Type);
10346 Ent := Entity (Task_Type);
10348 if not Is_Task_Type (Ent) then
10350 ("argument for pragma% must be task type", Task_Type);
10353 if No (Top_Guard) then
10355 ("pragma% takes two arguments", Task_Type);
10357 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
10360 Check_First_Subtype (Task_Type);
10362 if Rep_Item_Too_Late (Ent, N) then
10371 -- pragma Time_Slice (static_duration_EXPRESSION);
10373 when Pragma_Time_Slice => Time_Slice : declare
10379 Check_Arg_Count (1);
10380 Check_No_Identifiers;
10381 Check_In_Main_Program;
10382 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
10384 if not Error_Posted (Arg1) then
10386 while Present (Nod) loop
10387 if Nkind (Nod) = N_Pragma
10388 and then Chars (Nod) = Name_Time_Slice
10390 Error_Msg_Name_1 := Chars (N);
10391 Error_Msg_N ("duplicate pragma% not permitted", Nod);
10398 -- Process only if in main unit
10400 if Get_Source_Unit (Loc) = Main_Unit then
10401 Opt.Time_Slice_Set := True;
10402 Val := Expr_Value_R (Expression (Arg1));
10404 if Val <= Ureal_0 then
10405 Opt.Time_Slice_Value := 0;
10407 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
10408 Opt.Time_Slice_Value := 1_000_000_000;
10411 Opt.Time_Slice_Value :=
10412 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
10421 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
10423 -- TITLING_OPTION ::=
10424 -- [Title =>] STRING_LITERAL
10425 -- | [Subtitle =>] STRING_LITERAL
10427 when Pragma_Title => Title : declare
10428 Args : Args_List (1 .. 2);
10429 Names : constant Name_List (1 .. 2) := (
10435 Gather_Associations (Names, Args);
10437 for J in 1 .. 2 loop
10438 if Present (Args (J)) then
10439 Check_Arg_Is_String_Literal (Args (J));
10444 ---------------------
10445 -- Unchecked_Union --
10446 ---------------------
10448 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
10450 when Pragma_Unchecked_Union => Unchecked_Union : declare
10451 Assoc : constant Node_Id := Arg1;
10452 Type_Id : constant Node_Id := Expression (Assoc);
10463 Check_No_Identifiers;
10464 Check_Arg_Count (1);
10465 Check_Arg_Is_Local_Name (Arg1);
10467 Find_Type (Type_Id);
10468 Typ := Entity (Type_Id);
10471 or else Rep_Item_Too_Early (Typ, N)
10475 Typ := Underlying_Type (Typ);
10478 if Rep_Item_Too_Late (Typ, N) then
10482 Check_First_Subtype (Arg1);
10484 -- Note remaining cases are references to a type in the current
10485 -- declarative part. If we find an error, we post the error on
10486 -- the relevant type declaration at an appropriate point.
10488 if not Is_Record_Type (Typ) then
10489 Error_Msg_N ("Unchecked_Union must be record type", Typ);
10492 elsif Is_Tagged_Type (Typ) then
10493 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
10496 elsif Is_Limited_Type (Typ) then
10498 ("Unchecked_Union must not be limited record type", Typ);
10499 Explain_Limited_Type (Typ, Typ);
10503 if not Has_Discriminants (Typ) then
10505 ("Unchecked_Union must have one discriminant", Typ);
10509 Discr := First_Discriminant (Typ);
10510 while Present (Discr) loop
10511 if No (Discriminant_Default_Value (Discr)) then
10513 ("Unchecked_Union discriminant must have default value",
10516 Next_Discriminant (Discr);
10519 Tdef := Type_Definition (Declaration_Node (Typ));
10520 Clist := Component_List (Tdef);
10522 Comp := First (Component_Items (Clist));
10523 while Present (Comp) loop
10524 Check_Component (Comp);
10528 if No (Clist) or else No (Variant_Part (Clist)) then
10530 ("Unchecked_Union must have variant part",
10535 Vpart := Variant_Part (Clist);
10537 Variant := First (Variants (Vpart));
10538 while Present (Variant) loop
10539 Check_Variant (Variant);
10544 Set_Is_Unchecked_Union (Typ, True);
10545 Set_Convention (Typ, Convention_C);
10547 Set_Has_Unchecked_Union (Base_Type (Typ), True);
10548 Set_Is_Unchecked_Union (Base_Type (Typ), True);
10549 end Unchecked_Union;
10551 ------------------------
10552 -- Unimplemented_Unit --
10553 ------------------------
10555 -- pragma Unimplemented_Unit;
10557 -- Note: this only gives an error if we are generating code,
10558 -- or if we are in a generic library unit (where the pragma
10559 -- appears in the body, not in the spec).
10561 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
10562 Cunitent : constant Entity_Id :=
10563 Cunit_Entity (Get_Source_Unit (Loc));
10564 Ent_Kind : constant Entity_Kind :=
10569 Check_Arg_Count (0);
10571 if Operating_Mode = Generate_Code
10572 or else Ent_Kind = E_Generic_Function
10573 or else Ent_Kind = E_Generic_Procedure
10574 or else Ent_Kind = E_Generic_Package
10576 Get_Name_String (Chars (Cunitent));
10577 Set_Casing (Mixed_Case);
10578 Write_Str (Name_Buffer (1 .. Name_Len));
10579 Write_Str (" is not supported in this configuration");
10581 raise Unrecoverable_Error;
10583 end Unimplemented_Unit;
10585 ------------------------
10586 -- Universal_Aliasing --
10587 ------------------------
10589 -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)];
10591 when Pragma_Universal_Aliasing => Universal_Alias : declare
10596 Check_Arg_Count (1);
10597 Check_Optional_Identifier (Arg2, Name_Entity);
10598 Check_Arg_Is_Local_Name (Arg1);
10599 E_Id := Entity (Expression (Arg1));
10601 if E_Id = Any_Type then
10603 elsif No (E_Id) or else not Is_Type (E_Id) then
10604 Error_Pragma_Arg ("pragma% requires type", Arg1);
10607 Set_Universal_Aliasing (Implementation_Base_Type (E_Id));
10608 end Universal_Alias;
10610 --------------------
10611 -- Universal_Data --
10612 --------------------
10614 -- pragma Universal_Data [(library_unit_NAME)];
10616 when Pragma_Universal_Data =>
10619 -- If this is a configuration pragma, then set the universal
10620 -- addressing option, otherwise confirm that the pragma
10621 -- satisfies the requirements of library unit pragma placement
10622 -- and leave it to the GNAAMP back end to detect the pragma
10623 -- (avoids transitive setting of the option due to withed units).
10625 if Is_Configuration_Pragma then
10626 Universal_Addressing_On_AAMP := True;
10628 Check_Valid_Library_Unit_Pragma;
10631 if not AAMP_On_Target then
10632 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
10639 -- pragma Unreferenced (local_Name {, local_Name});
10641 -- or when used in a context clause:
10643 -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
10645 when Pragma_Unreferenced => Unreferenced : declare
10646 Arg_Node : Node_Id;
10647 Arg_Expr : Node_Id;
10648 Arg_Ent : Entity_Id;
10653 Check_At_Least_N_Arguments (1);
10655 -- Check case of appearing within context clause
10657 if Is_In_Context_Clause then
10659 -- The arguments must all be units mentioned in a with clause
10660 -- in the same context clause. Note we already checked (in
10661 -- Par.Prag) that the arguments are either identifiers or
10662 -- selected components.
10665 while Present (Arg_Node) loop
10666 Citem := First (List_Containing (N));
10667 while Citem /= N loop
10668 if Nkind (Citem) = N_With_Clause
10669 and then Same_Name (Name (Citem), Expression (Arg_Node))
10671 Set_Has_Pragma_Unreferenced
10674 (Library_Unit (Citem))));
10675 Set_Unit_Name (Expression (Arg_Node), Name (Citem));
10684 ("argument of pragma% is not with'ed unit", Arg_Node);
10690 -- Case of not in list of context items
10694 while Present (Arg_Node) loop
10695 Check_No_Identifier (Arg_Node);
10697 -- Note: the analyze call done by Check_Arg_Is_Local_Name
10698 -- will in fact generate reference, so that the entity will
10699 -- have a reference, which will inhibit any warnings about
10700 -- it not being referenced, and also properly show up in the
10701 -- ali file as a reference. But this reference is recorded
10702 -- before the Has_Pragma_Unreferenced flag is set, so that
10703 -- no warning is generated for this reference.
10705 Check_Arg_Is_Local_Name (Arg_Node);
10706 Arg_Expr := Get_Pragma_Arg (Arg_Node);
10708 if Is_Entity_Name (Arg_Expr) then
10709 Arg_Ent := Entity (Arg_Expr);
10711 -- If the entity is overloaded, the pragma applies to the
10712 -- most recent overloading, as documented. In this case,
10713 -- name resolution does not generate a reference, so it
10714 -- must be done here explicitly.
10716 if Is_Overloaded (Arg_Expr) then
10717 Generate_Reference (Arg_Ent, N);
10720 Set_Has_Pragma_Unreferenced (Arg_Ent);
10728 --------------------------
10729 -- Unreferenced_Objects --
10730 --------------------------
10732 -- pragma Unreferenced_Objects (local_Name {, local_Name});
10734 when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare
10735 Arg_Node : Node_Id;
10736 Arg_Expr : Node_Id;
10740 Check_At_Least_N_Arguments (1);
10743 while Present (Arg_Node) loop
10744 Check_No_Identifier (Arg_Node);
10745 Check_Arg_Is_Local_Name (Arg_Node);
10746 Arg_Expr := Get_Pragma_Arg (Arg_Node);
10748 if not Is_Entity_Name (Arg_Expr)
10749 or else not Is_Type (Entity (Arg_Expr))
10752 ("argument for pragma% must be type or subtype", Arg_Node);
10755 Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr));
10758 end Unreferenced_Objects;
10760 ------------------------------
10761 -- Unreserve_All_Interrupts --
10762 ------------------------------
10764 -- pragma Unreserve_All_Interrupts;
10766 when Pragma_Unreserve_All_Interrupts =>
10768 Check_Arg_Count (0);
10770 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
10771 Unreserve_All_Interrupts := True;
10778 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
10780 when Pragma_Unsuppress =>
10782 Process_Suppress_Unsuppress (False);
10784 -------------------
10785 -- Use_VADS_Size --
10786 -------------------
10788 -- pragma Use_VADS_Size;
10790 when Pragma_Use_VADS_Size =>
10792 Check_Arg_Count (0);
10793 Check_Valid_Configuration_Pragma;
10794 Use_VADS_Size := True;
10796 ---------------------
10797 -- Validity_Checks --
10798 ---------------------
10800 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
10802 when Pragma_Validity_Checks => Validity_Checks : declare
10803 A : constant Node_Id := Expression (Arg1);
10809 Check_Arg_Count (1);
10810 Check_No_Identifiers;
10812 if Nkind (A) = N_String_Literal then
10816 Slen : constant Natural := Natural (String_Length (S));
10817 Options : String (1 .. Slen);
10823 C := Get_String_Char (S, Int (J));
10824 exit when not In_Character_Range (C);
10825 Options (J) := Get_Character (C);
10828 Set_Validity_Check_Options (Options);
10836 elsif Nkind (A) = N_Identifier then
10838 if Chars (A) = Name_All_Checks then
10839 Set_Validity_Check_Options ("a");
10841 elsif Chars (A) = Name_On then
10842 Validity_Checks_On := True;
10844 elsif Chars (A) = Name_Off then
10845 Validity_Checks_On := False;
10849 end Validity_Checks;
10855 -- pragma Volatile (LOCAL_NAME);
10857 when Pragma_Volatile =>
10858 Process_Atomic_Shared_Volatile;
10860 -------------------------
10861 -- Volatile_Components --
10862 -------------------------
10864 -- pragma Volatile_Components (array_LOCAL_NAME);
10866 -- Volatile is handled by the same circuit as Atomic_Components
10872 -- pragma Warnings (On | Off);
10873 -- pragma Warnings (On | Off, LOCAL_NAME);
10874 -- pragma Warnings (static_string_EXPRESSION);
10875 -- pragma Warnings (On | Off, STRING_LITERAL);
10877 when Pragma_Warnings => Warnings : begin
10879 Check_At_Least_N_Arguments (1);
10880 Check_No_Identifiers;
10883 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
10886 -- One argument case
10888 if Arg_Count = 1 then
10890 -- On/Off one argument case was processed by parser
10892 if Nkind (Argx) = N_Identifier
10894 (Chars (Argx) = Name_On
10896 Chars (Argx) = Name_Off)
10900 -- One argument case must be ON/OFF or static string expr
10902 elsif not Is_Static_String_Expression (Arg1) then
10904 ("argument of pragma% must be On/Off or " &
10905 "static string expression", Arg2);
10907 -- One argument string expression case
10911 Lit : constant Node_Id := Expr_Value_S (Argx);
10912 Str : constant String_Id := Strval (Lit);
10913 Len : constant Nat := String_Length (Str);
10921 while J <= Len loop
10922 C := Get_String_Char (Str, J);
10923 OK := In_Character_Range (C);
10926 Chr := Get_Character (C);
10930 if J < Len and then Chr = '.' then
10932 C := Get_String_Char (Str, J);
10933 Chr := Get_Character (C);
10935 if not Set_Dot_Warning_Switch (Chr) then
10937 ("invalid warning switch character " &
10944 OK := Set_Warning_Switch (Chr);
10950 ("invalid warning switch character " & Chr,
10959 -- Two or more arguments (must be two)
10962 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
10963 Check_At_Most_N_Arguments (2);
10971 E_Id := Expression (Arg2);
10974 -- In the expansion of an inlined body, a reference to
10975 -- the formal may be wrapped in a conversion if the
10976 -- actual is a conversion. Retrieve the real entity name.
10978 if (In_Instance_Body
10979 or else In_Inlined_Body)
10980 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
10982 E_Id := Expression (E_Id);
10985 -- Entity name case
10987 if Is_Entity_Name (E_Id) then
10988 E := Entity (E_Id);
10995 (E, (Chars (Expression (Arg1)) = Name_Off));
10997 if Is_Enumeration_Type (E) then
11001 Lit := First_Literal (E);
11002 while Present (Lit) loop
11003 Set_Warnings_Off (Lit);
11004 Next_Literal (Lit);
11009 exit when No (Homonym (E));
11014 -- Error if not entity or static string literal case
11016 elsif not Is_Static_String_Expression (Arg2) then
11018 ("second argument of pragma% must be entity " &
11019 "name or static string expression", Arg2);
11021 -- String literal case
11024 String_To_Name_Buffer
11025 (Strval (Expr_Value_S (Expression (Arg2))));
11027 -- Note on configuration pragma case: If this is a
11028 -- configuration pragma, then for an OFF pragma, we
11029 -- just set Config True in the call, which is all
11030 -- that needs to be done. For the case of ON, this
11031 -- is normally an error, unless it is canceling the
11032 -- effect of a previous OFF pragma in the same file.
11033 -- In any other case, an error will be signalled (ON
11034 -- with no matching OFF).
11036 if Chars (Argx) = Name_Off then
11037 Set_Specific_Warning_Off
11038 (Loc, Name_Buffer (1 .. Name_Len),
11039 Config => Is_Configuration_Pragma);
11041 elsif Chars (Argx) = Name_On then
11042 Set_Specific_Warning_On
11043 (Loc, Name_Buffer (1 .. Name_Len), Err);
11047 ("?pragma Warnings On with no " &
11048 "matching Warnings Off",
11058 -------------------
11059 -- Weak_External --
11060 -------------------
11062 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
11064 when Pragma_Weak_External => Weak_External : declare
11069 Check_Arg_Count (1);
11070 Check_Optional_Identifier (Arg1, Name_Entity);
11071 Check_Arg_Is_Library_Level_Local_Name (Arg1);
11072 Ent := Entity (Expression (Arg1));
11074 if Rep_Item_Too_Early (Ent, N) then
11077 Ent := Underlying_Type (Ent);
11080 -- The only processing required is to link this item on to the
11081 -- list of rep items for the given entity. This is accomplished
11082 -- by the call to Rep_Item_Too_Late (when no error is detected
11083 -- and False is returned).
11085 if Rep_Item_Too_Late (Ent, N) then
11088 Set_Has_Gigi_Rep_Item (Ent);
11092 -----------------------------
11093 -- Wide_Character_Encoding --
11094 -----------------------------
11096 -- pragma Wide_Character_Encoding (IDENTIFIER);
11098 when Pragma_Wide_Character_Encoding =>
11100 -- Nothing to do, handled in parser. Note that we do not enforce
11101 -- configuration pragma placement, this pragma can appear at any
11102 -- place in the source, allowing mixed encodings within a single
11107 --------------------
11108 -- Unknown_Pragma --
11109 --------------------
11111 -- Should be impossible, since the case of an unknown pragma is
11112 -- separately processed before the case statement is entered.
11114 when Unknown_Pragma =>
11115 raise Program_Error;
11119 when Pragma_Exit => null;
11120 end Analyze_Pragma;
11122 ---------------------------------
11123 -- Delay_Config_Pragma_Analyze --
11124 ---------------------------------
11126 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
11128 return Chars (N) = Name_Interrupt_State
11130 Chars (N) = Name_Priority_Specific_Dispatching;
11131 end Delay_Config_Pragma_Analyze;
11133 -------------------------
11134 -- Get_Base_Subprogram --
11135 -------------------------
11137 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
11138 Result : Entity_Id;
11141 -- Follow subprogram renaming chain
11144 while Is_Subprogram (Result)
11146 (Is_Generic_Instance (Result)
11147 or else Nkind (Parent (Declaration_Node (Result))) =
11148 N_Subprogram_Renaming_Declaration)
11149 and then Present (Alias (Result))
11151 Result := Alias (Result);
11155 end Get_Base_Subprogram;
11157 -----------------------------
11158 -- Is_Config_Static_String --
11159 -----------------------------
11161 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
11163 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
11164 -- This is an internal recursive function that is just like the
11165 -- outer function except that it adds the string to the name buffer
11166 -- rather than placing the string in the name buffer.
11168 ------------------------------
11169 -- Add_Config_Static_String --
11170 ------------------------------
11172 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
11179 if Nkind (N) = N_Op_Concat then
11180 if Add_Config_Static_String (Left_Opnd (N)) then
11181 N := Right_Opnd (N);
11187 if Nkind (N) /= N_String_Literal then
11188 Error_Msg_N ("string literal expected for pragma argument", N);
11192 for J in 1 .. String_Length (Strval (N)) loop
11193 C := Get_String_Char (Strval (N), J);
11195 if not In_Character_Range (C) then
11197 ("string literal contains invalid wide character",
11198 Sloc (N) + 1 + Source_Ptr (J));
11202 Add_Char_To_Name_Buffer (Get_Character (C));
11207 end Add_Config_Static_String;
11209 -- Start of prorcessing for Is_Config_Static_String
11214 return Add_Config_Static_String (Arg);
11215 end Is_Config_Static_String;
11217 -----------------------------------------
11218 -- Is_Non_Significant_Pragma_Reference --
11219 -----------------------------------------
11221 -- This function makes use of the following static table which indicates
11222 -- whether a given pragma is significant. A value of -1 in this table
11223 -- indicates that the reference is significant. A value of zero indicates
11224 -- than appearence as any argument is insignificant, a positive value
11225 -- indicates that appearence in that parameter position is significant.
11227 Sig_Flags : constant array (Pragma_Id) of Int :=
11229 (Pragma_AST_Entry => -1,
11230 Pragma_Abort_Defer => -1,
11231 Pragma_Ada_83 => -1,
11232 Pragma_Ada_95 => -1,
11233 Pragma_Ada_05 => -1,
11234 Pragma_Ada_2005 => -1,
11235 Pragma_All_Calls_Remote => -1,
11236 Pragma_Annotate => -1,
11237 Pragma_Assert => -1,
11238 Pragma_Assertion_Policy => 0,
11239 Pragma_Asynchronous => -1,
11240 Pragma_Atomic => 0,
11241 Pragma_Atomic_Components => 0,
11242 Pragma_Attach_Handler => -1,
11243 Pragma_Check_Name => 0,
11244 Pragma_CIL_Constructor => -1,
11245 Pragma_CPP_Class => 0,
11246 Pragma_CPP_Constructor => 0,
11247 Pragma_CPP_Virtual => 0,
11248 Pragma_CPP_Vtable => 0,
11249 Pragma_C_Pass_By_Copy => 0,
11250 Pragma_Comment => 0,
11251 Pragma_Common_Object => -1,
11252 Pragma_Compile_Time_Error => -1,
11253 Pragma_Compile_Time_Warning => -1,
11254 Pragma_Compiler_Unit => 0,
11255 Pragma_Complete_Representation => 0,
11256 Pragma_Complex_Representation => 0,
11257 Pragma_Component_Alignment => -1,
11258 Pragma_Controlled => 0,
11259 Pragma_Convention => 0,
11260 Pragma_Convention_Identifier => 0,
11261 Pragma_Debug => -1,
11262 Pragma_Debug_Policy => 0,
11263 Pragma_Detect_Blocking => -1,
11264 Pragma_Discard_Names => 0,
11265 Pragma_Elaborate => -1,
11266 Pragma_Elaborate_All => -1,
11267 Pragma_Elaborate_Body => -1,
11268 Pragma_Elaboration_Checks => -1,
11269 Pragma_Eliminate => -1,
11270 Pragma_Export => -1,
11271 Pragma_Export_Exception => -1,
11272 Pragma_Export_Function => -1,
11273 Pragma_Export_Object => -1,
11274 Pragma_Export_Procedure => -1,
11275 Pragma_Export_Value => -1,
11276 Pragma_Export_Valued_Procedure => -1,
11277 Pragma_Extend_System => -1,
11278 Pragma_Extensions_Allowed => -1,
11279 Pragma_External => -1,
11280 Pragma_External_Name_Casing => -1,
11281 Pragma_Finalize_Storage_Only => 0,
11282 Pragma_Float_Representation => 0,
11283 Pragma_Ident => -1,
11284 Pragma_Implicit_Packing => 0,
11285 Pragma_Import => +2,
11286 Pragma_Import_Exception => 0,
11287 Pragma_Import_Function => 0,
11288 Pragma_Import_Object => 0,
11289 Pragma_Import_Procedure => 0,
11290 Pragma_Import_Valued_Procedure => 0,
11291 Pragma_Initialize_Scalars => -1,
11292 Pragma_Inline => 0,
11293 Pragma_Inline_Always => 0,
11294 Pragma_Inline_Generic => 0,
11295 Pragma_Inspection_Point => -1,
11296 Pragma_Interface => +2,
11297 Pragma_Interface_Name => +2,
11298 Pragma_Interrupt_Handler => -1,
11299 Pragma_Interrupt_Priority => -1,
11300 Pragma_Interrupt_State => -1,
11301 Pragma_Java_Constructor => -1,
11302 Pragma_Java_Interface => -1,
11303 Pragma_Keep_Names => 0,
11304 Pragma_License => -1,
11305 Pragma_Link_With => -1,
11306 Pragma_Linker_Alias => -1,
11307 Pragma_Linker_Constructor => -1,
11308 Pragma_Linker_Destructor => -1,
11309 Pragma_Linker_Options => -1,
11310 Pragma_Linker_Section => -1,
11312 Pragma_Locking_Policy => -1,
11313 Pragma_Long_Float => -1,
11314 Pragma_Machine_Attribute => -1,
11316 Pragma_Main_Storage => -1,
11317 Pragma_Memory_Size => -1,
11318 Pragma_No_Return => 0,
11319 Pragma_No_Body => 0,
11320 Pragma_No_Run_Time => -1,
11321 Pragma_No_Strict_Aliasing => -1,
11322 Pragma_Normalize_Scalars => -1,
11323 Pragma_Obsolescent => 0,
11324 Pragma_Optimize => -1,
11327 Pragma_Passive => -1,
11328 Pragma_Preelaborable_Initialization => -1,
11329 Pragma_Polling => -1,
11330 Pragma_Persistent_BSS => 0,
11331 Pragma_Preelaborate => -1,
11332 Pragma_Preelaborate_05 => -1,
11333 Pragma_Priority => -1,
11334 Pragma_Priority_Specific_Dispatching => -1,
11335 Pragma_Profile => 0,
11336 Pragma_Profile_Warnings => 0,
11337 Pragma_Propagate_Exceptions => -1,
11338 Pragma_Psect_Object => -1,
11340 Pragma_Pure_05 => -1,
11341 Pragma_Pure_Function => -1,
11342 Pragma_Queuing_Policy => -1,
11343 Pragma_Ravenscar => -1,
11344 Pragma_Remote_Call_Interface => -1,
11345 Pragma_Remote_Types => -1,
11346 Pragma_Restricted_Run_Time => -1,
11347 Pragma_Restriction_Warnings => -1,
11348 Pragma_Restrictions => -1,
11349 Pragma_Reviewable => -1,
11350 Pragma_Share_Generic => -1,
11351 Pragma_Shared => -1,
11352 Pragma_Shared_Passive => -1,
11353 Pragma_Source_File_Name => -1,
11354 Pragma_Source_File_Name_Project => -1,
11355 Pragma_Source_Reference => -1,
11356 Pragma_Storage_Size => -1,
11357 Pragma_Storage_Unit => -1,
11358 Pragma_Static_Elaboration_Desired => -1,
11359 Pragma_Stream_Convert => -1,
11360 Pragma_Style_Checks => -1,
11361 Pragma_Subtitle => -1,
11362 Pragma_Suppress => 0,
11363 Pragma_Suppress_Exception_Locations => 0,
11364 Pragma_Suppress_All => -1,
11365 Pragma_Suppress_Debug_Info => 0,
11366 Pragma_Suppress_Initialization => 0,
11367 Pragma_System_Name => -1,
11368 Pragma_Task_Dispatching_Policy => -1,
11369 Pragma_Task_Info => -1,
11370 Pragma_Task_Name => -1,
11371 Pragma_Task_Storage => 0,
11372 Pragma_Time_Slice => -1,
11373 Pragma_Title => -1,
11374 Pragma_Unchecked_Union => 0,
11375 Pragma_Unimplemented_Unit => -1,
11376 Pragma_Universal_Aliasing => -1,
11377 Pragma_Universal_Data => -1,
11378 Pragma_Unreferenced => -1,
11379 Pragma_Unreferenced_Objects => -1,
11380 Pragma_Unreserve_All_Interrupts => -1,
11381 Pragma_Unsuppress => 0,
11382 Pragma_Use_VADS_Size => -1,
11383 Pragma_Validity_Checks => -1,
11384 Pragma_Volatile => 0,
11385 Pragma_Volatile_Components => 0,
11386 Pragma_Warnings => -1,
11387 Pragma_Weak_External => -1,
11388 Pragma_Wide_Character_Encoding => 0,
11389 Unknown_Pragma => 0);
11391 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
11399 if Nkind (P) /= N_Pragma_Argument_Association then
11403 C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
11413 A := First (Pragma_Argument_Associations (Parent (P)));
11414 for J in 1 .. C - 1 loop
11425 end Is_Non_Significant_Pragma_Reference;
11427 ------------------------------
11428 -- Is_Pragma_String_Literal --
11429 ------------------------------
11431 -- This function returns true if the corresponding pragma argument is
11432 -- a static string expression. These are the only cases in which string
11433 -- literals can appear as pragma arguments. We also allow a string
11434 -- literal as the first argument to pragma Assert (although it will
11435 -- of course always generate a type error).
11437 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
11438 Pragn : constant Node_Id := Parent (Par);
11439 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
11440 Pname : constant Name_Id := Chars (Pragn);
11446 N := First (Assoc);
11453 if Pname = Name_Assert then
11456 elsif Pname = Name_Export then
11459 elsif Pname = Name_Ident then
11462 elsif Pname = Name_Import then
11465 elsif Pname = Name_Interface_Name then
11468 elsif Pname = Name_Linker_Alias then
11471 elsif Pname = Name_Linker_Section then
11474 elsif Pname = Name_Machine_Attribute then
11477 elsif Pname = Name_Source_File_Name then
11480 elsif Pname = Name_Source_Reference then
11483 elsif Pname = Name_Title then
11486 elsif Pname = Name_Subtitle then
11492 end Is_Pragma_String_Literal;
11494 --------------------------------------
11495 -- Process_Compilation_Unit_Pragmas --
11496 --------------------------------------
11498 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
11500 -- A special check for pragma Suppress_All. This is a strange DEC
11501 -- pragma, strange because it comes at the end of the unit. If we
11502 -- have a pragma Suppress_All in the Pragmas_After of the current
11503 -- unit, then we insert a pragma Suppress (All_Checks) at the start
11504 -- of the context clause to ensure the correct processing.
11507 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
11511 if Present (PA) then
11513 while Present (P) loop
11514 if Chars (P) = Name_Suppress_All then
11515 Prepend_To (Context_Items (N),
11516 Make_Pragma (Sloc (P),
11517 Chars => Name_Suppress,
11518 Pragma_Argument_Associations => New_List (
11519 Make_Pragma_Argument_Association (Sloc (P),
11521 Make_Identifier (Sloc (P),
11522 Chars => Name_All_Checks)))));
11530 end Process_Compilation_Unit_Pragmas;
11541 --------------------------------
11542 -- Set_Encoded_Interface_Name --
11543 --------------------------------
11545 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
11546 Str : constant String_Id := Strval (S);
11547 Len : constant Int := String_Length (Str);
11552 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
11555 -- Stores encoded value of character code CC. The encoding we
11556 -- use an underscore followed by four lower case hex digits.
11562 procedure Encode is
11564 Store_String_Char (Get_Char_Code ('_'));
11566 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
11568 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
11570 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
11572 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
11575 -- Start of processing for Set_Encoded_Interface_Name
11578 -- If first character is asterisk, this is a link name, and we
11579 -- leave it completely unmodified. We also ignore null strings
11580 -- (the latter case happens only in error cases) and no encoding
11581 -- should occur for Java or AAMP interface names.
11584 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
11585 or else VM_Target /= No_VM
11586 or else AAMP_On_Target
11588 Set_Interface_Name (E, S);
11593 CC := Get_String_Char (Str, J);
11595 exit when not In_Character_Range (CC);
11597 C := Get_Character (CC);
11599 exit when C /= '_' and then C /= '$'
11600 and then C not in '0' .. '9'
11601 and then C not in 'a' .. 'z'
11602 and then C not in 'A' .. 'Z';
11605 Set_Interface_Name (E, S);
11613 -- Here we need to encode. The encoding we use as follows:
11614 -- three underscores + four hex digits (lower case)
11618 for J in 1 .. String_Length (Str) loop
11619 CC := Get_String_Char (Str, J);
11621 if not In_Character_Range (CC) then
11624 C := Get_Character (CC);
11626 if C = '_' or else C = '$'
11627 or else C in '0' .. '9'
11628 or else C in 'a' .. 'z'
11629 or else C in 'A' .. 'Z'
11631 Store_String_Char (CC);
11638 Set_Interface_Name (E,
11639 Make_String_Literal (Sloc (S),
11640 Strval => End_String));
11642 end Set_Encoded_Interface_Name;
11644 -------------------
11645 -- Set_Unit_Name --
11646 -------------------
11648 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
11653 if Nkind (N) = N_Identifier
11654 and then Nkind (With_Item) = N_Identifier
11656 Set_Entity (N, Entity (With_Item));
11658 elsif Nkind (N) = N_Selected_Component then
11659 Change_Selected_Component_To_Expanded_Name (N);
11660 Set_Entity (N, Entity (With_Item));
11661 Set_Entity (Selector_Name (N), Entity (N));
11663 Pref := Prefix (N);
11664 Scop := Scope (Entity (N));
11665 while Nkind (Pref) = N_Selected_Component loop
11666 Change_Selected_Component_To_Expanded_Name (Pref);
11667 Set_Entity (Selector_Name (Pref), Scop);
11668 Set_Entity (Pref, Scop);
11669 Pref := Prefix (Pref);
11670 Scop := Scope (Scop);
11673 Set_Entity (Pref, Scop);
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