1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, 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.Sp; use Namet.Sp;
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_Aux; use Sem_Aux;
53 with Sem_Ch3; use Sem_Ch3;
54 with Sem_Ch6; use Sem_Ch6;
55 with Sem_Ch8; use Sem_Ch8;
56 with Sem_Ch13; use Sem_Ch13;
57 with Sem_Dist; use Sem_Dist;
58 with Sem_Elim; use Sem_Elim;
59 with Sem_Eval; use Sem_Eval;
60 with Sem_Intr; use Sem_Intr;
61 with Sem_Mech; use Sem_Mech;
62 with Sem_Res; use Sem_Res;
63 with Sem_Type; use Sem_Type;
64 with Sem_Util; use Sem_Util;
65 with Sem_VFpt; use Sem_VFpt;
66 with Sem_Warn; use Sem_Warn;
67 with Stand; use Stand;
68 with Sinfo; use Sinfo;
69 with Sinfo.CN; use Sinfo.CN;
70 with Sinput; use Sinput;
71 with Snames; use Snames;
72 with Stringt; use Stringt;
73 with Stylesw; use Stylesw;
75 with Targparm; use Targparm;
76 with Tbuild; use Tbuild;
78 with Uintp; use Uintp;
79 with Uname; use Uname;
80 with Urealp; use Urealp;
81 with Validsw; use Validsw;
83 package body Sem_Prag is
85 ----------------------------------------------
86 -- Common Handling of Import-Export Pragmas --
87 ----------------------------------------------
89 -- In the following section, a number of Import_xxx and Export_xxx
90 -- pragmas are defined by GNAT. These are compatible with the DEC
91 -- pragmas of the same name, and all have the following common
92 -- form and processing:
95 -- [Internal =>] LOCAL_NAME
96 -- [, [External =>] EXTERNAL_SYMBOL]
97 -- [, other optional parameters ]);
100 -- [Internal =>] LOCAL_NAME
101 -- [, [External =>] EXTERNAL_SYMBOL]
102 -- [, other optional parameters ]);
104 -- EXTERNAL_SYMBOL ::=
106 -- | static_string_EXPRESSION
108 -- The internal LOCAL_NAME designates the entity that is imported or
109 -- exported, and must refer to an entity in the current declarative
110 -- part (as required by the rules for LOCAL_NAME).
112 -- The external linker name is designated by the External parameter
113 -- if given, or the Internal parameter if not (if there is no External
114 -- parameter, the External parameter is a copy of the Internal name).
116 -- If the External parameter is given as a string, then this string
117 -- is treated as an external name (exactly as though it had been given
118 -- as an External_Name parameter for a normal Import pragma).
120 -- If the External parameter is given as an identifier (or there is no
121 -- External parameter, so that the Internal identifier is used), then
122 -- the external name is the characters of the identifier, translated
123 -- to all upper case letters for OpenVMS versions of GNAT, and to all
124 -- lower case letters for all other versions
126 -- Note: the external name specified or implied by any of these special
127 -- Import_xxx or Export_xxx pragmas override an external or link name
128 -- specified in a previous Import or Export pragma.
130 -- Note: these and all other DEC-compatible GNAT pragmas allow full
131 -- use of named notation, following the standard rules for subprogram
132 -- calls, i.e. parameters can be given in any order if named notation
133 -- is used, and positional and named notation can be mixed, subject to
134 -- the rule that all positional parameters must appear first.
136 -- Note: All these pragmas are implemented exactly following the DEC
137 -- design and implementation and are intended to be fully compatible
138 -- with the use of these pragmas in the DEC Ada compiler.
140 --------------------------------------------
141 -- Checking for Duplicated External Names --
142 --------------------------------------------
144 -- It is suspicious if two separate Export pragmas use the same external
145 -- name. The following table is used to diagnose this situation so that
146 -- an appropriate warning can be issued.
148 -- The Node_Id stored is for the N_String_Literal node created to
149 -- hold the value of the external name. The Sloc of this node is
150 -- used to cross-reference the location of the duplication.
152 package Externals is new Table.Table (
153 Table_Component_Type => Node_Id,
154 Table_Index_Type => Int,
155 Table_Low_Bound => 0,
156 Table_Initial => 100,
157 Table_Increment => 100,
158 Table_Name => "Name_Externals");
160 -------------------------------------
161 -- Local Subprograms and Variables --
162 -------------------------------------
164 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
165 -- This routine is used for possible casing adjustment of an explicit
166 -- external name supplied as a string literal (the node N), according
167 -- to the casing requirement of Opt.External_Name_Casing. If this is
168 -- set to As_Is, then the string literal is returned unchanged, but if
169 -- it is set to Uppercase or Lowercase, then a new string literal with
170 -- appropriate casing is constructed.
172 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
173 -- If Def_Id refers to a renamed subprogram, then the base subprogram
174 -- (the original one, following the renaming chain) is returned.
175 -- Otherwise the entity is returned unchanged. Should be in Einfo???
177 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
178 -- All the routines that check pragma arguments take either a pragma
179 -- argument association (in which case the expression of the argument
180 -- association is checked), or the expression directly. The function
181 -- Get_Pragma_Arg is a utility used to deal with these two cases. If Arg
182 -- is a pragma argument association node, then its expression is returned,
183 -- otherwise Arg is returned unchanged.
186 -- This is a dummy function called by the processing for pragma Reviewable.
187 -- It is there for assisting front end debugging. By placing a Reviewable
188 -- pragma in the source program, a breakpoint on rv catches this place in
189 -- the source, allowing convenient stepping to the point of interest.
191 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
192 -- Place semantic information on the argument of an Elaborate or
193 -- Elaborate_All pragma. Entity name for unit and its parents is
194 -- taken from item in previous with_clause that mentions the unit.
196 -------------------------------
197 -- Adjust_External_Name_Case --
198 -------------------------------
200 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
204 -- Adjust case of literal if required
206 if Opt.External_Name_Exp_Casing = As_Is then
210 -- Copy existing string
216 for J in 1 .. String_Length (Strval (N)) loop
217 CC := Get_String_Char (Strval (N), J);
219 if Opt.External_Name_Exp_Casing = Uppercase
220 and then CC >= Get_Char_Code ('a')
221 and then CC <= Get_Char_Code ('z')
223 Store_String_Char (CC - 32);
225 elsif Opt.External_Name_Exp_Casing = Lowercase
226 and then CC >= Get_Char_Code ('A')
227 and then CC <= Get_Char_Code ('Z')
229 Store_String_Char (CC + 32);
232 Store_String_Char (CC);
237 Make_String_Literal (Sloc (N),
238 Strval => End_String);
240 end Adjust_External_Name_Case;
242 ------------------------------
243 -- Analyze_PPC_In_Decl_Part --
244 ------------------------------
246 procedure Analyze_PPC_In_Decl_Part (N : Node_Id; S : Entity_Id) is
247 Arg1 : constant Node_Id :=
248 First (Pragma_Argument_Associations (N));
249 Arg2 : constant Node_Id := Next (Arg1);
252 -- Install formals and push subprogram spec onto scope stack
253 -- so that we can see the formals from the pragma.
258 -- Preanalyze the boolean expression, we treat this as a
259 -- spec expression (i.e. similar to a default expression).
261 Preanalyze_Spec_Expression
262 (Get_Pragma_Arg (Arg1), Standard_Boolean);
264 -- If there is a message argument, analyze it the same way
266 if Present (Arg2) then
267 Preanalyze_Spec_Expression
268 (Get_Pragma_Arg (Arg2), Standard_String);
271 -- Remove the subprogram from the scope stack now that the
272 -- pre-analysis of the precondition/postcondition is done.
275 end Analyze_PPC_In_Decl_Part;
281 procedure Analyze_Pragma (N : Node_Id) is
282 Loc : constant Source_Ptr := Sloc (N);
283 Pname : constant Name_Id := Pragma_Name (N);
286 Pragma_Exit : exception;
287 -- This exception is used to exit pragma processing completely. It
288 -- is used when an error is detected, and no further processing is
289 -- required. It is also used if an earlier error has left the tree
290 -- in a state where the pragma should not be processed.
293 -- Number of pragma argument associations
299 -- First four pragma arguments (pragma argument association nodes,
300 -- or Empty if the corresponding argument does not exist).
302 type Name_List is array (Natural range <>) of Name_Id;
303 type Args_List is array (Natural range <>) of Node_Id;
304 -- Types used for arguments to Check_Arg_Order and Gather_Associations
306 procedure Ada_2005_Pragma;
307 -- Called for pragmas defined in Ada 2005, that are not in Ada 95. In
308 -- Ada 95 mode, these are implementation defined pragmas, so should be
309 -- caught by the No_Implementation_Pragmas restriction
311 procedure Check_Ada_83_Warning;
312 -- Issues a warning message for the current pragma if operating in Ada
313 -- 83 mode (used for language pragmas that are not a standard part of
314 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
317 procedure Check_Arg_Count (Required : Nat);
318 -- Check argument count for pragma is equal to given parameter.
319 -- If not, then issue an error message and raise Pragma_Exit.
321 -- Note: all routines whose name is Check_Arg_Is_xxx take an
322 -- argument Arg which can either be a pragma argument association,
323 -- in which case the check is applied to the expression of the
324 -- association or an expression directly.
326 procedure Check_Arg_Is_External_Name (Arg : Node_Id);
327 -- Check that an argument has the right form for an EXTERNAL_NAME
328 -- parameter of an extended import/export pragma. The rule is that
329 -- the name must be an identifier or string literal (in Ada 83 mode)
330 -- or a static string expression (in Ada 95 mode).
332 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
333 -- Check the specified argument Arg to make sure that it is an
334 -- identifier. If not give error and raise Pragma_Exit.
336 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
337 -- Check the specified argument Arg to make sure that it is an
338 -- integer literal. If not give error and raise Pragma_Exit.
340 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
341 -- Check the specified argument Arg to make sure that it has the
342 -- proper syntactic form for a local name and meets the semantic
343 -- requirements for a local name. The local name is analyzed as
344 -- part of the processing for this call. In addition, the local
345 -- name is required to represent an entity at the library level.
347 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
348 -- Check the specified argument Arg to make sure that it has the
349 -- proper syntactic form for a local name and meets the semantic
350 -- requirements for a local name. The local name is analyzed as
351 -- part of the processing for this call.
353 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
354 -- Check the specified argument Arg to make sure that it is a valid
355 -- locking policy name. If not give error and raise Pragma_Exit.
357 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
358 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
359 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3, N4 : Name_Id);
360 -- Check the specified argument Arg to make sure that it is an
361 -- identifier whose name matches either N1 or N2 (or N3 if present).
362 -- If not then give error and raise Pragma_Exit.
364 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
365 -- Check the specified argument Arg to make sure that it is a valid
366 -- queuing policy name. If not give error and raise Pragma_Exit.
368 procedure Check_Arg_Is_Static_Expression
371 -- Check the specified argument Arg to make sure that it is a static
372 -- expression of the given type (i.e. it will be analyzed and resolved
373 -- using this type, which can be any valid argument to Resolve, e.g.
374 -- Any_Integer is OK). If not, given error and raise Pragma_Exit.
376 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
377 -- Check the specified argument Arg to make sure that it is a
378 -- string literal. If not give error and raise Pragma_Exit
380 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
381 -- Check the specified argument Arg to make sure that it is a valid
382 -- valid task dispatching policy name. If not give error and raise
385 procedure Check_Arg_Order (Names : Name_List);
386 -- Checks for an instance of two arguments with identifiers for the
387 -- current pragma which are not in the sequence indicated by Names,
388 -- and if so, generates a fatal message about bad order of arguments.
390 procedure Check_At_Least_N_Arguments (N : Nat);
391 -- Check there are at least N arguments present
393 procedure Check_At_Most_N_Arguments (N : Nat);
394 -- Check there are no more than N arguments present
396 procedure Check_Component (Comp : Node_Id);
397 -- Examine Unchecked_Union component for correct use of per-object
398 -- constrained subtypes, and for restrictions on finalizable components.
400 procedure Check_Duplicated_Export_Name (Nam : Node_Id);
401 -- Nam is an N_String_Literal node containing the external name set
402 -- by an Import or Export pragma (or extended Import or Export pragma).
403 -- This procedure checks for possible duplications if this is the
404 -- export case, and if found, issues an appropriate error message.
406 procedure Check_First_Subtype (Arg : Node_Id);
407 -- Checks that Arg, whose expression is an entity name referencing
408 -- a subtype, does not reference a type that is not a first subtype.
410 procedure Check_In_Main_Program;
411 -- Common checks for pragmas that appear within a main program
412 -- (Priority, Main_Storage, Time_Slice, Relative_Deadline).
414 procedure Check_Interrupt_Or_Attach_Handler;
415 -- Common processing for first argument of pragma Interrupt_Handler
416 -- or pragma Attach_Handler.
418 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
419 -- Check that pragma appears in a declarative part, or in a package
420 -- specification, i.e. that it does not occur in a statement sequence
423 procedure Check_No_Identifier (Arg : Node_Id);
424 -- Checks that the given argument does not have an identifier. If
425 -- an identifier is present, then an error message is issued, and
426 -- Pragma_Exit is raised.
428 procedure Check_No_Identifiers;
429 -- Checks that none of the arguments to the pragma has an identifier.
430 -- If any argument has an identifier, then an error message is issued,
431 -- and Pragma_Exit is raised.
433 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
434 -- Checks if the given argument has an identifier, and if so, requires
435 -- it to match the given identifier name. If there is a non-matching
436 -- identifier, then an error message is given and Error_Pragmas raised.
438 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
439 -- Checks if the given argument has an identifier, and if so, requires
440 -- it to match the given identifier name. If there is a non-matching
441 -- identifier, then an error message is given and Error_Pragmas raised.
442 -- In this version of the procedure, the identifier name is given as
443 -- a string with lower case letters.
445 procedure Check_Precondition_Postcondition (In_Body : out Boolean);
446 -- Called to process a precondition or postcondition pragma. There are
449 -- The pragma appears after a subprogram spec
451 -- If the corresponding check is not enabled, the pragma is analyzed
452 -- but otherwise ignored and control returns with In_Body set False.
454 -- If the check is enabled, then the first step is to analyze the
455 -- pragma, but this is skipped if the subprogram spec appears within
456 -- a package specification (because this is the case where we delay
457 -- analysis till the end of the spec). Then (whether or not it was
458 -- analyzed), the pragma is chained to the subprogram in question
459 -- (using Spec_PPC_List and Next_Pragma) and control returns to the
460 -- caller with In_Body set False.
462 -- The pragma appears at the start of subprogram body declarations
464 -- In this case an immediate return to the caller is made with
465 -- In_Body set True, and the pragma is NOT analyzed.
467 -- In all other cases, an error message for bad placement is given
469 procedure Check_Static_Constraint (Constr : Node_Id);
470 -- Constr is a constraint from an N_Subtype_Indication node from a
471 -- component constraint in an Unchecked_Union type. This routine checks
472 -- that the constraint is static as required by the restrictions for
475 procedure Check_Valid_Configuration_Pragma;
476 -- Legality checks for placement of a configuration pragma
478 procedure Check_Valid_Library_Unit_Pragma;
479 -- Legality checks for library unit pragmas. A special case arises for
480 -- pragmas in generic instances that come from copies of the original
481 -- library unit pragmas in the generic templates. In the case of other
482 -- than library level instantiations these can appear in contexts which
483 -- would normally be invalid (they only apply to the original template
484 -- and to library level instantiations), and they are simply ignored,
485 -- which is implemented by rewriting them as null statements.
487 procedure Check_Variant (Variant : Node_Id);
488 -- Check Unchecked_Union variant for lack of nested variants and
489 -- presence of at least one component.
491 procedure Error_Pragma (Msg : String);
492 pragma No_Return (Error_Pragma);
493 -- Outputs error message for current pragma. The message contains a %
494 -- that will be replaced with the pragma name, and the flag is placed
495 -- on the pragma itself. Pragma_Exit is then raised.
497 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
498 pragma No_Return (Error_Pragma_Arg);
499 -- Outputs error message for current pragma. The message may contain
500 -- a % that will be replaced with the pragma name. The parameter Arg
501 -- may either be a pragma argument association, in which case the flag
502 -- is placed on the expression of this association, or an expression,
503 -- in which case the flag is placed directly on the expression. The
504 -- message is placed using Error_Msg_N, so the message may also contain
505 -- an & insertion character which will reference the given Arg value.
506 -- After placing the message, Pragma_Exit is raised.
508 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
509 pragma No_Return (Error_Pragma_Arg);
510 -- Similar to above form of Error_Pragma_Arg except that two messages
511 -- are provided, the second is a continuation comment starting with \.
513 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
514 pragma No_Return (Error_Pragma_Arg_Ident);
515 -- Outputs error message for current pragma. The message may contain
516 -- a % that will be replaced with the pragma name. The parameter Arg
517 -- must be a pragma argument association with a non-empty identifier
518 -- (i.e. its Chars field must be set), and the error message is placed
519 -- on the identifier. The message is placed using Error_Msg_N so
520 -- the message may also contain an & insertion character which will
521 -- reference the identifier. After placing the message, Pragma_Exit
524 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id);
525 pragma No_Return (Error_Pragma_Ref);
526 -- Outputs error message for current pragma. The message may contain
527 -- a % that will be replaced with the pragma name. The parameter Ref
528 -- must be an entity whose name can be referenced by & and sloc by #.
529 -- After placing the message, Pragma_Exit is raised.
531 function Find_Lib_Unit_Name return Entity_Id;
532 -- Used for a library unit pragma to find the entity to which the
533 -- library unit pragma applies, returns the entity found.
535 procedure Find_Program_Unit_Name (Id : Node_Id);
536 -- If the pragma is a compilation unit pragma, the id must denote the
537 -- compilation unit in the same compilation, and the pragma must appear
538 -- in the list of preceding or trailing pragmas. If it is a program
539 -- unit pragma that is not a compilation unit pragma, then the
540 -- identifier must be visible.
542 function Find_Unique_Parameterless_Procedure
544 Arg : Node_Id) return Entity_Id;
545 -- Used for a procedure pragma to find the unique parameterless
546 -- procedure identified by Name, returns it if it exists, otherwise
547 -- errors out and uses Arg as the pragma argument for the message.
549 procedure Gather_Associations
551 Args : out Args_List);
552 -- This procedure is used to gather the arguments for a pragma that
553 -- permits arbitrary ordering of parameters using the normal rules
554 -- for named and positional parameters. The Names argument is a list
555 -- of Name_Id values that corresponds to the allowed pragma argument
556 -- association identifiers in order. The result returned in Args is
557 -- a list of corresponding expressions that are the pragma arguments.
558 -- Note that this is a list of expressions, not of pragma argument
559 -- associations (Gather_Associations has completely checked all the
560 -- optional identifiers when it returns). An entry in Args is Empty
561 -- on return if the corresponding argument is not present.
563 procedure GNAT_Pragma;
564 -- Called for all GNAT defined pragmas to check the relevant restriction
565 -- (No_Implementation_Pragmas).
567 function Is_Before_First_Decl
568 (Pragma_Node : Node_Id;
569 Decls : List_Id) return Boolean;
570 -- Return True if Pragma_Node is before the first declarative item in
571 -- Decls where Decls is the list of declarative items.
573 function Is_Configuration_Pragma return Boolean;
574 -- Determines if the placement of the current pragma is appropriate
575 -- for a configuration pragma.
577 function Is_In_Context_Clause return Boolean;
578 -- Returns True if pragma appears within the context clause of a unit,
579 -- and False for any other placement (does not generate any messages).
581 function Is_Static_String_Expression (Arg : Node_Id) return Boolean;
582 -- Analyzes the argument, and determines if it is a static string
583 -- expression, returns True if so, False if non-static or not String.
585 procedure Pragma_Misplaced;
586 -- Issue fatal error message for misplaced pragma
588 procedure Process_Atomic_Shared_Volatile;
589 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
590 -- Shared is an obsolete Ada 83 pragma, treated as being identical
591 -- in effect to pragma Atomic.
593 procedure Process_Compile_Time_Warning_Or_Error;
594 -- Common processing for Compile_Time_Error and Compile_Time_Warning
596 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
597 -- Common processing for Convention, Interface, Import and Export.
598 -- Checks first two arguments of pragma, and sets the appropriate
599 -- convention value in the specified entity or entities. On return
600 -- C is the convention, E is the referenced entity.
602 procedure Process_Extended_Import_Export_Exception_Pragma
603 (Arg_Internal : Node_Id;
604 Arg_External : Node_Id;
607 -- Common processing for the pragmas Import/Export_Exception.
608 -- The three arguments correspond to the three named parameters of
609 -- the pragma. An argument is empty if the corresponding parameter
610 -- is not present in the pragma.
612 procedure Process_Extended_Import_Export_Object_Pragma
613 (Arg_Internal : Node_Id;
614 Arg_External : Node_Id;
616 -- Common processing for the pragmas Import/Export_Object.
617 -- The three arguments correspond to the three named parameters
618 -- of the pragmas. An argument is empty if the corresponding
619 -- parameter is not present in the pragma.
621 procedure Process_Extended_Import_Export_Internal_Arg
622 (Arg_Internal : Node_Id := Empty);
623 -- Common processing for all extended Import and Export pragmas. The
624 -- argument is the pragma parameter for the Internal argument. If
625 -- Arg_Internal is empty or inappropriate, an error message is posted.
626 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
627 -- set to identify the referenced entity.
629 procedure Process_Extended_Import_Export_Subprogram_Pragma
630 (Arg_Internal : Node_Id;
631 Arg_External : Node_Id;
632 Arg_Parameter_Types : Node_Id;
633 Arg_Result_Type : Node_Id := Empty;
634 Arg_Mechanism : Node_Id;
635 Arg_Result_Mechanism : Node_Id := Empty;
636 Arg_First_Optional_Parameter : Node_Id := Empty);
637 -- Common processing for all extended Import and Export pragmas
638 -- applying to subprograms. The caller omits any arguments that do
639 -- not apply to the pragma in question (for example, Arg_Result_Type
640 -- can be non-Empty only in the Import_Function and Export_Function
641 -- cases). The argument names correspond to the allowed pragma
642 -- association identifiers.
644 procedure Process_Generic_List;
645 -- Common processing for Share_Generic and Inline_Generic
647 procedure Process_Import_Or_Interface;
648 -- Common processing for Import of Interface
650 procedure Process_Inline (Active : Boolean);
651 -- Common processing for Inline and Inline_Always. The parameter
652 -- indicates if the inline pragma is active, i.e. if it should
653 -- actually cause inlining to occur.
655 procedure Process_Interface_Name
656 (Subprogram_Def : Entity_Id;
659 -- Given the last two arguments of pragma Import, pragma Export, or
660 -- pragma Interface_Name, performs validity checks and sets the
661 -- Interface_Name field of the given subprogram entity to the
662 -- appropriate external or link name, depending on the arguments
663 -- given. Ext_Arg is always present, but Link_Arg may be missing.
664 -- Note that Ext_Arg may represent the Link_Name if Link_Arg is
665 -- missing, and appropriate named notation is used for Ext_Arg.
666 -- If neither Ext_Arg nor Link_Arg is present, the interface name
667 -- is set to the default from the subprogram name.
669 procedure Process_Interrupt_Or_Attach_Handler;
670 -- Common processing for Interrupt and Attach_Handler pragmas
672 procedure Process_Restrictions_Or_Restriction_Warnings (Warn : Boolean);
673 -- Common processing for Restrictions and Restriction_Warnings pragmas.
674 -- Warn is True for Restriction_Warnings, or for Restrictions if the
675 -- flag Treat_Restrictions_As_Warnings is set, and False if this flag
676 -- is not set in the Restrictions case.
678 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
679 -- Common processing for Suppress and Unsuppress. The boolean parameter
680 -- Suppress_Case is True for the Suppress case, and False for the
683 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
684 -- This procedure sets the Is_Exported flag for the given entity,
685 -- checking that the entity was not previously imported. Arg is
686 -- the argument that specified the entity. A check is also made
687 -- for exporting inappropriate entities.
689 procedure Set_Extended_Import_Export_External_Name
690 (Internal_Ent : Entity_Id;
691 Arg_External : Node_Id);
692 -- Common processing for all extended import export pragmas. The first
693 -- argument, Internal_Ent, is the internal entity, which has already
694 -- been checked for validity by the caller. Arg_External is from the
695 -- Import or Export pragma, and may be null if no External parameter
696 -- was present. If Arg_External is present and is a non-null string
697 -- (a null string is treated as the default), then the Interface_Name
698 -- field of Internal_Ent is set appropriately.
700 procedure Set_Imported (E : Entity_Id);
701 -- This procedure sets the Is_Imported flag for the given entity,
702 -- checking that it is not previously exported or imported.
704 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
705 -- Mech is a parameter passing mechanism (see Import_Function syntax
706 -- for MECHANISM_NAME). This routine checks that the mechanism argument
707 -- has the right form, and if not issues an error message. If the
708 -- argument has the right form then the Mechanism field of Ent is
709 -- set appropriately.
711 procedure Set_Ravenscar_Profile (N : Node_Id);
712 -- Activate the set of configuration pragmas and restrictions that
713 -- make up the Ravenscar Profile. N is the corresponding pragma
714 -- node, which is used for error messages on any constructs
715 -- that violate the profile.
717 ---------------------
718 -- Ada_2005_Pragma --
719 ---------------------
721 procedure Ada_2005_Pragma is
723 if Ada_Version <= Ada_95 then
724 Check_Restriction (No_Implementation_Pragmas, N);
728 --------------------------
729 -- Check_Ada_83_Warning --
730 --------------------------
732 procedure Check_Ada_83_Warning is
734 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
735 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
737 end Check_Ada_83_Warning;
739 ---------------------
740 -- Check_Arg_Count --
741 ---------------------
743 procedure Check_Arg_Count (Required : Nat) is
745 if Arg_Count /= Required then
746 Error_Pragma ("wrong number of arguments for pragma%");
750 --------------------------------
751 -- Check_Arg_Is_External_Name --
752 --------------------------------
754 procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
755 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
758 if Nkind (Argx) = N_Identifier then
762 Analyze_And_Resolve (Argx, Standard_String);
764 if Is_OK_Static_Expression (Argx) then
767 elsif Etype (Argx) = Any_Type then
770 -- An interesting special case, if we have a string literal and
771 -- we are in Ada 83 mode, then we allow it even though it will
772 -- not be flagged as static. This allows expected Ada 83 mode
773 -- use of external names which are string literals, even though
774 -- technically these are not static in Ada 83.
776 elsif Ada_Version = Ada_83
777 and then Nkind (Argx) = N_String_Literal
781 -- Static expression that raises Constraint_Error. This has
782 -- already been flagged, so just exit from pragma processing.
784 elsif Is_Static_Expression (Argx) then
787 -- Here we have a real error (non-static expression)
790 Error_Msg_Name_1 := Pname;
792 ("argument for pragma% must be a identifier or " &
793 "static string expression!", Argx);
797 end Check_Arg_Is_External_Name;
799 -----------------------------
800 -- Check_Arg_Is_Identifier --
801 -----------------------------
803 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
804 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
806 if Nkind (Argx) /= N_Identifier then
808 ("argument for pragma% must be identifier", Argx);
810 end Check_Arg_Is_Identifier;
812 ----------------------------------
813 -- Check_Arg_Is_Integer_Literal --
814 ----------------------------------
816 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
817 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
819 if Nkind (Argx) /= N_Integer_Literal then
821 ("argument for pragma% must be integer literal", Argx);
823 end Check_Arg_Is_Integer_Literal;
825 -------------------------------------------
826 -- Check_Arg_Is_Library_Level_Local_Name --
827 -------------------------------------------
831 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
832 -- | library_unit_NAME
834 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
836 Check_Arg_Is_Local_Name (Arg);
838 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
839 and then Comes_From_Source (N)
842 ("argument for pragma% must be library level entity", Arg);
844 end Check_Arg_Is_Library_Level_Local_Name;
846 -----------------------------
847 -- Check_Arg_Is_Local_Name --
848 -----------------------------
852 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
853 -- | library_unit_NAME
855 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
856 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
861 if Nkind (Argx) not in N_Direct_Name
862 and then (Nkind (Argx) /= N_Attribute_Reference
863 or else Present (Expressions (Argx))
864 or else Nkind (Prefix (Argx)) /= N_Identifier)
865 and then (not Is_Entity_Name (Argx)
866 or else not Is_Compilation_Unit (Entity (Argx)))
868 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
871 if Is_Entity_Name (Argx)
872 and then Scope (Entity (Argx)) /= Current_Scope
875 ("pragma% argument must be in same declarative part", Arg);
877 end Check_Arg_Is_Local_Name;
879 ---------------------------------
880 -- Check_Arg_Is_Locking_Policy --
881 ---------------------------------
883 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
884 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
887 Check_Arg_Is_Identifier (Argx);
889 if not Is_Locking_Policy_Name (Chars (Argx)) then
891 ("& is not a valid locking policy name", Argx);
893 end Check_Arg_Is_Locking_Policy;
895 -------------------------
896 -- Check_Arg_Is_One_Of --
897 -------------------------
899 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
900 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
903 Check_Arg_Is_Identifier (Argx);
905 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
906 Error_Msg_Name_2 := N1;
907 Error_Msg_Name_3 := N2;
908 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
910 end Check_Arg_Is_One_Of;
912 procedure Check_Arg_Is_One_Of
914 N1, N2, N3 : Name_Id)
916 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
919 Check_Arg_Is_Identifier (Argx);
921 if Chars (Argx) /= N1
922 and then Chars (Argx) /= N2
923 and then Chars (Argx) /= N3
925 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
927 end Check_Arg_Is_One_Of;
929 procedure Check_Arg_Is_One_Of
931 N1, N2, N3, N4 : Name_Id)
933 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
936 Check_Arg_Is_Identifier (Argx);
938 if Chars (Argx) /= N1
939 and then Chars (Argx) /= N2
940 and then Chars (Argx) /= N3
941 and then Chars (Argx) /= N4
943 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
945 end Check_Arg_Is_One_Of;
947 ---------------------------------
948 -- Check_Arg_Is_Queuing_Policy --
949 ---------------------------------
951 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
952 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
955 Check_Arg_Is_Identifier (Argx);
957 if not Is_Queuing_Policy_Name (Chars (Argx)) then
959 ("& is not a valid queuing policy name", Argx);
961 end Check_Arg_Is_Queuing_Policy;
963 ------------------------------------
964 -- Check_Arg_Is_Static_Expression --
965 ------------------------------------
967 procedure Check_Arg_Is_Static_Expression
971 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
974 Analyze_And_Resolve (Argx, Typ);
976 if Is_OK_Static_Expression (Argx) then
979 elsif Etype (Argx) = Any_Type then
982 -- An interesting special case, if we have a string literal and
983 -- we are in Ada 83 mode, then we allow it even though it will
984 -- not be flagged as static. This allows the use of Ada 95
985 -- pragmas like Import in Ada 83 mode. They will of course be
986 -- flagged with warnings as usual, but will not cause errors.
988 elsif Ada_Version = Ada_83
989 and then Nkind (Argx) = N_String_Literal
993 -- Static expression that raises Constraint_Error. This has
994 -- already been flagged, so just exit from pragma processing.
996 elsif Is_Static_Expression (Argx) then
999 -- Finally, we have a real error
1002 Error_Msg_Name_1 := Pname;
1003 Flag_Non_Static_Expr
1004 ("argument for pragma% must be a static expression!", Argx);
1007 end Check_Arg_Is_Static_Expression;
1009 ---------------------------------
1010 -- Check_Arg_Is_String_Literal --
1011 ---------------------------------
1013 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
1014 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1016 if Nkind (Argx) /= N_String_Literal then
1018 ("argument for pragma% must be string literal", Argx);
1020 end Check_Arg_Is_String_Literal;
1022 ------------------------------------------
1023 -- Check_Arg_Is_Task_Dispatching_Policy --
1024 ------------------------------------------
1026 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
1027 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1030 Check_Arg_Is_Identifier (Argx);
1032 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
1034 ("& is not a valid task dispatching policy name", Argx);
1036 end Check_Arg_Is_Task_Dispatching_Policy;
1038 ---------------------
1039 -- Check_Arg_Order --
1040 ---------------------
1042 procedure Check_Arg_Order (Names : Name_List) is
1045 Highest_So_Far : Natural := 0;
1046 -- Highest index in Names seen do far
1050 for J in 1 .. Arg_Count loop
1051 if Chars (Arg) /= No_Name then
1052 for K in Names'Range loop
1053 if Chars (Arg) = Names (K) then
1054 if K < Highest_So_Far then
1055 Error_Msg_Name_1 := Pname;
1057 ("parameters out of order for pragma%", Arg);
1058 Error_Msg_Name_1 := Names (K);
1059 Error_Msg_Name_2 := Names (Highest_So_Far);
1060 Error_Msg_N ("\% must appear before %", Arg);
1064 Highest_So_Far := K;
1072 end Check_Arg_Order;
1074 --------------------------------
1075 -- Check_At_Least_N_Arguments --
1076 --------------------------------
1078 procedure Check_At_Least_N_Arguments (N : Nat) is
1080 if Arg_Count < N then
1081 Error_Pragma ("too few arguments for pragma%");
1083 end Check_At_Least_N_Arguments;
1085 -------------------------------
1086 -- Check_At_Most_N_Arguments --
1087 -------------------------------
1089 procedure Check_At_Most_N_Arguments (N : Nat) is
1092 if Arg_Count > N then
1094 for J in 1 .. N loop
1096 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
1099 end Check_At_Most_N_Arguments;
1101 ---------------------
1102 -- Check_Component --
1103 ---------------------
1105 procedure Check_Component (Comp : Node_Id) is
1107 if Nkind (Comp) = N_Component_Declaration then
1109 Sindic : constant Node_Id :=
1110 Subtype_Indication (Component_Definition (Comp));
1111 Typ : constant Entity_Id :=
1112 Etype (Defining_Identifier (Comp));
1114 if Nkind (Sindic) = N_Subtype_Indication then
1116 -- Ada 2005 (AI-216): If a component subtype is subject to
1117 -- a per-object constraint, then the component type shall
1118 -- be an Unchecked_Union.
1120 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
1122 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
1124 Error_Msg_N ("component subtype subject to per-object" &
1125 " constraint must be an Unchecked_Union", Comp);
1129 if Is_Controlled (Typ) then
1131 ("component of unchecked union cannot be controlled", Comp);
1133 elsif Has_Task (Typ) then
1135 ("component of unchecked union cannot have tasks", Comp);
1139 end Check_Component;
1141 ----------------------------------
1142 -- Check_Duplicated_Export_Name --
1143 ----------------------------------
1145 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
1146 String_Val : constant String_Id := Strval (Nam);
1149 -- We are only interested in the export case, and in the case of
1150 -- generics, it is the instance, not the template, that is the
1151 -- problem (the template will generate a warning in any case).
1153 if not Inside_A_Generic
1154 and then (Prag_Id = Pragma_Export
1156 Prag_Id = Pragma_Export_Procedure
1158 Prag_Id = Pragma_Export_Valued_Procedure
1160 Prag_Id = Pragma_Export_Function)
1162 for J in Externals.First .. Externals.Last loop
1163 if String_Equal (String_Val, Strval (Externals.Table (J))) then
1164 Error_Msg_Sloc := Sloc (Externals.Table (J));
1165 Error_Msg_N ("external name duplicates name given#", Nam);
1170 Externals.Append (Nam);
1172 end Check_Duplicated_Export_Name;
1174 -------------------------
1175 -- Check_First_Subtype --
1176 -------------------------
1178 procedure Check_First_Subtype (Arg : Node_Id) is
1179 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1181 if not Is_First_Subtype (Entity (Argx)) then
1183 ("pragma% cannot apply to subtype", Argx);
1185 end Check_First_Subtype;
1187 ---------------------------
1188 -- Check_In_Main_Program --
1189 ---------------------------
1191 procedure Check_In_Main_Program is
1192 P : constant Node_Id := Parent (N);
1195 -- Must be at in subprogram body
1197 if Nkind (P) /= N_Subprogram_Body then
1198 Error_Pragma ("% pragma allowed only in subprogram");
1200 -- Otherwise warn if obviously not main program
1202 elsif Present (Parameter_Specifications (Specification (P)))
1203 or else not Is_Compilation_Unit (Defining_Entity (P))
1205 Error_Msg_Name_1 := Pname;
1207 ("?pragma% is only effective in main program", N);
1209 end Check_In_Main_Program;
1211 ---------------------------------------
1212 -- Check_Interrupt_Or_Attach_Handler --
1213 ---------------------------------------
1215 procedure Check_Interrupt_Or_Attach_Handler is
1216 Arg1_X : constant Node_Id := Expression (Arg1);
1217 Handler_Proc, Proc_Scope : Entity_Id;
1222 if Prag_Id = Pragma_Interrupt_Handler then
1223 Check_Restriction (No_Dynamic_Attachment, N);
1226 Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
1227 Proc_Scope := Scope (Handler_Proc);
1229 -- On AAMP only, a pragma Interrupt_Handler is supported for
1230 -- nonprotected parameterless procedures.
1232 if not AAMP_On_Target
1233 or else Prag_Id = Pragma_Attach_Handler
1235 if Ekind (Proc_Scope) /= E_Protected_Type then
1237 ("argument of pragma% must be protected procedure", Arg1);
1240 if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
1241 Error_Pragma ("pragma% must be in protected definition");
1245 if not Is_Library_Level_Entity (Proc_Scope)
1246 or else (AAMP_On_Target
1247 and then not Is_Library_Level_Entity (Handler_Proc))
1250 ("argument for pragma% must be library level entity", Arg1);
1252 end Check_Interrupt_Or_Attach_Handler;
1254 -------------------------------------------
1255 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1256 -------------------------------------------
1258 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1267 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1270 elsif Nkind (P) = N_Package_Specification then
1273 elsif Nkind (P) = N_Block_Statement then
1276 -- Note: the following tests seem a little peculiar, because
1277 -- they test for bodies, but if we were in the statement part
1278 -- of the body, we would already have hit the handled statement
1279 -- sequence, so the only way we get here is by being in the
1280 -- declarative part of the body.
1282 elsif Nkind (P) = N_Subprogram_Body
1283 or else Nkind (P) = N_Package_Body
1284 or else Nkind (P) = N_Task_Body
1285 or else Nkind (P) = N_Entry_Body
1293 Error_Pragma ("pragma% is not in declarative part or package spec");
1294 end Check_Is_In_Decl_Part_Or_Package_Spec;
1296 -------------------------
1297 -- Check_No_Identifier --
1298 -------------------------
1300 procedure Check_No_Identifier (Arg : Node_Id) is
1302 if Chars (Arg) /= No_Name then
1303 Error_Pragma_Arg_Ident
1304 ("pragma% does not permit identifier& here", Arg);
1306 end Check_No_Identifier;
1308 --------------------------
1309 -- Check_No_Identifiers --
1310 --------------------------
1312 procedure Check_No_Identifiers is
1315 if Arg_Count > 0 then
1317 while Present (Arg_Node) loop
1318 Check_No_Identifier (Arg_Node);
1322 end Check_No_Identifiers;
1324 -------------------------------
1325 -- Check_Optional_Identifier --
1326 -------------------------------
1328 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1330 if Present (Arg) and then Chars (Arg) /= No_Name then
1331 if Chars (Arg) /= Id then
1332 Error_Msg_Name_1 := Pname;
1333 Error_Msg_Name_2 := Id;
1334 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1338 end Check_Optional_Identifier;
1340 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1342 Name_Buffer (1 .. Id'Length) := Id;
1343 Name_Len := Id'Length;
1344 Check_Optional_Identifier (Arg, Name_Find);
1345 end Check_Optional_Identifier;
1347 --------------------------------------
1348 -- Check_Precondition_Postcondition --
1349 --------------------------------------
1351 procedure Check_Precondition_Postcondition (In_Body : out Boolean) is
1357 if not Is_List_Member (N) then
1361 -- Record whether pragma is enabled
1363 Set_PPC_Enabled (N, Check_Enabled (Pname));
1365 -- Search prior declarations
1368 while Present (Prev (P)) loop
1370 PO := Original_Node (P);
1372 -- Skip past prior pragma
1374 if Nkind (PO) = N_Pragma then
1377 -- Skip stuff not coming from source
1379 elsif not Comes_From_Source (PO) then
1382 -- Here if we hit a subprogram declaration
1384 elsif Nkind (PO) = N_Subprogram_Declaration then
1385 S := Defining_Unit_Name (Specification (PO));
1387 -- Analyze the pragma unless it appears within a package spec,
1388 -- which is the case where we delay the analysis of the PPC
1389 -- until the end of the package declarations (for details,
1390 -- see Analyze_Package_Specification.Analyze_PPCs).
1392 if Ekind (Scope (S)) /= E_Package
1394 Ekind (Scope (S)) /= E_Generic_Package
1396 Analyze_PPC_In_Decl_Part (N, S);
1399 -- Chain spec PPC pragma to list for subprogram
1401 Set_Next_Pragma (N, Spec_PPC_List (S));
1402 Set_Spec_PPC_List (S, N);
1404 -- Return indicating spec case
1409 -- If we encounter any other declaration moving back, misplaced
1416 -- If we fall through loop, pragma is at start of list, so see if
1417 -- it is at the start of declarations of a subprogram body.
1419 if Nkind (Parent (N)) = N_Subprogram_Body
1420 and then List_Containing (N) = Declarations (Parent (N))
1425 -- If not, it was misplaced
1430 end Check_Precondition_Postcondition;
1432 -----------------------------
1433 -- Check_Static_Constraint --
1434 -----------------------------
1436 -- Note: for convenience in writing this procedure, in addition to
1437 -- the officially (i.e. by spec) allowed argument which is always
1438 -- a constraint, it also allows ranges and discriminant associations.
1439 -- Above is not clear ???
1441 procedure Check_Static_Constraint (Constr : Node_Id) is
1443 procedure Require_Static (E : Node_Id);
1444 -- Require given expression to be static expression
1446 --------------------
1447 -- Require_Static --
1448 --------------------
1450 procedure Require_Static (E : Node_Id) is
1452 if not Is_OK_Static_Expression (E) then
1453 Flag_Non_Static_Expr
1454 ("non-static constraint not allowed in Unchecked_Union!", E);
1459 -- Start of processing for Check_Static_Constraint
1462 case Nkind (Constr) is
1463 when N_Discriminant_Association =>
1464 Require_Static (Expression (Constr));
1467 Require_Static (Low_Bound (Constr));
1468 Require_Static (High_Bound (Constr));
1470 when N_Attribute_Reference =>
1471 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1472 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1474 when N_Range_Constraint =>
1475 Check_Static_Constraint (Range_Expression (Constr));
1477 when N_Index_Or_Discriminant_Constraint =>
1481 IDC := First (Constraints (Constr));
1482 while Present (IDC) loop
1483 Check_Static_Constraint (IDC);
1491 end Check_Static_Constraint;
1493 --------------------------------------
1494 -- Check_Valid_Configuration_Pragma --
1495 --------------------------------------
1497 -- A configuration pragma must appear in the context clause of a
1498 -- compilation unit, and only other pragmas may precede it. Note that
1499 -- the test also allows use in a configuration pragma file.
1501 procedure Check_Valid_Configuration_Pragma is
1503 if not Is_Configuration_Pragma then
1504 Error_Pragma ("incorrect placement for configuration pragma%");
1506 end Check_Valid_Configuration_Pragma;
1508 -------------------------------------
1509 -- Check_Valid_Library_Unit_Pragma --
1510 -------------------------------------
1512 procedure Check_Valid_Library_Unit_Pragma is
1514 Parent_Node : Node_Id;
1515 Unit_Name : Entity_Id;
1516 Unit_Kind : Node_Kind;
1517 Unit_Node : Node_Id;
1518 Sindex : Source_File_Index;
1521 if not Is_List_Member (N) then
1525 Plist := List_Containing (N);
1526 Parent_Node := Parent (Plist);
1528 if Parent_Node = Empty then
1531 -- Case of pragma appearing after a compilation unit. In this
1532 -- case it must have an argument with the corresponding name
1533 -- and must be part of the following pragmas of its parent.
1535 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1536 if Plist /= Pragmas_After (Parent_Node) then
1539 elsif Arg_Count = 0 then
1541 ("argument required if outside compilation unit");
1544 Check_No_Identifiers;
1545 Check_Arg_Count (1);
1546 Unit_Node := Unit (Parent (Parent_Node));
1547 Unit_Kind := Nkind (Unit_Node);
1549 Analyze (Expression (Arg1));
1551 if Unit_Kind = N_Generic_Subprogram_Declaration
1552 or else Unit_Kind = N_Subprogram_Declaration
1554 Unit_Name := Defining_Entity (Unit_Node);
1556 elsif Unit_Kind in N_Generic_Instantiation then
1557 Unit_Name := Defining_Entity (Unit_Node);
1560 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1563 if Chars (Unit_Name) /=
1564 Chars (Entity (Expression (Arg1)))
1567 ("pragma% argument is not current unit name", Arg1);
1570 if Ekind (Unit_Name) = E_Package
1571 and then Present (Renamed_Entity (Unit_Name))
1573 Error_Pragma ("pragma% not allowed for renamed package");
1577 -- Pragma appears other than after a compilation unit
1580 -- Here we check for the generic instantiation case and also
1581 -- for the case of processing a generic formal package. We
1582 -- detect these cases by noting that the Sloc on the node
1583 -- does not belong to the current compilation unit.
1585 Sindex := Source_Index (Current_Sem_Unit);
1587 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1588 Rewrite (N, Make_Null_Statement (Loc));
1591 -- If before first declaration, the pragma applies to the
1592 -- enclosing unit, and the name if present must be this name.
1594 elsif Is_Before_First_Decl (N, Plist) then
1595 Unit_Node := Unit_Declaration_Node (Current_Scope);
1596 Unit_Kind := Nkind (Unit_Node);
1598 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1601 elsif Unit_Kind = N_Subprogram_Body
1602 and then not Acts_As_Spec (Unit_Node)
1606 elsif Nkind (Parent_Node) = N_Package_Body then
1609 elsif Nkind (Parent_Node) = N_Package_Specification
1610 and then Plist = Private_Declarations (Parent_Node)
1614 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1615 or else Nkind (Parent_Node) =
1616 N_Generic_Subprogram_Declaration)
1617 and then Plist = Generic_Formal_Declarations (Parent_Node)
1621 elsif Arg_Count > 0 then
1622 Analyze (Expression (Arg1));
1624 if Entity (Expression (Arg1)) /= Current_Scope then
1626 ("name in pragma% must be enclosing unit", Arg1);
1629 -- It is legal to have no argument in this context
1635 -- Error if not before first declaration. This is because a
1636 -- library unit pragma argument must be the name of a library
1637 -- unit (RM 10.1.5(7)), but the only names permitted in this
1638 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1639 -- generic subprogram declarations or generic instantiations.
1643 ("pragma% misplaced, must be before first declaration");
1647 end Check_Valid_Library_Unit_Pragma;
1653 procedure Check_Variant (Variant : Node_Id) is
1654 Clist : constant Node_Id := Component_List (Variant);
1658 if not Is_Non_Empty_List (Component_Items (Clist)) then
1660 ("Unchecked_Union may not have empty component list",
1665 Comp := First (Component_Items (Clist));
1666 while Present (Comp) loop
1667 Check_Component (Comp);
1676 procedure Error_Pragma (Msg : String) is
1678 Error_Msg_Name_1 := Pname;
1679 Error_Msg_N (Msg, N);
1683 ----------------------
1684 -- Error_Pragma_Arg --
1685 ----------------------
1687 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1689 Error_Msg_Name_1 := Pname;
1690 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1692 end Error_Pragma_Arg;
1694 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1696 Error_Msg_Name_1 := Pname;
1697 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1698 Error_Pragma_Arg (Msg2, Arg);
1699 end Error_Pragma_Arg;
1701 ----------------------------
1702 -- Error_Pragma_Arg_Ident --
1703 ----------------------------
1705 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1707 Error_Msg_Name_1 := Pname;
1708 Error_Msg_N (Msg, Arg);
1710 end Error_Pragma_Arg_Ident;
1712 ----------------------
1713 -- Error_Pragma_Ref --
1714 ----------------------
1716 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id) is
1718 Error_Msg_Name_1 := Pname;
1719 Error_Msg_Sloc := Sloc (Ref);
1720 Error_Msg_NE (Msg, N, Ref);
1722 end Error_Pragma_Ref;
1724 ------------------------
1725 -- Find_Lib_Unit_Name --
1726 ------------------------
1728 function Find_Lib_Unit_Name return Entity_Id is
1730 -- Return inner compilation unit entity, for case of nested
1731 -- categorization pragmas. This happens in generic unit.
1733 if Nkind (Parent (N)) = N_Package_Specification
1734 and then Defining_Entity (Parent (N)) /= Current_Scope
1736 return Defining_Entity (Parent (N));
1738 return Current_Scope;
1740 end Find_Lib_Unit_Name;
1742 ----------------------------
1743 -- Find_Program_Unit_Name --
1744 ----------------------------
1746 procedure Find_Program_Unit_Name (Id : Node_Id) is
1747 Unit_Name : Entity_Id;
1748 Unit_Kind : Node_Kind;
1749 P : constant Node_Id := Parent (N);
1752 if Nkind (P) = N_Compilation_Unit then
1753 Unit_Kind := Nkind (Unit (P));
1755 if Unit_Kind = N_Subprogram_Declaration
1756 or else Unit_Kind = N_Package_Declaration
1757 or else Unit_Kind in N_Generic_Declaration
1759 Unit_Name := Defining_Entity (Unit (P));
1761 if Chars (Id) = Chars (Unit_Name) then
1762 Set_Entity (Id, Unit_Name);
1763 Set_Etype (Id, Etype (Unit_Name));
1765 Set_Etype (Id, Any_Type);
1767 ("cannot find program unit referenced by pragma%");
1771 Set_Etype (Id, Any_Type);
1772 Error_Pragma ("pragma% inapplicable to this unit");
1778 end Find_Program_Unit_Name;
1780 -----------------------------------------
1781 -- Find_Unique_Parameterless_Procedure --
1782 -----------------------------------------
1784 function Find_Unique_Parameterless_Procedure
1786 Arg : Node_Id) return Entity_Id
1788 Proc : Entity_Id := Empty;
1791 -- The body of this procedure needs some comments ???
1793 if not Is_Entity_Name (Name) then
1795 ("argument of pragma% must be entity name", Arg);
1797 elsif not Is_Overloaded (Name) then
1798 Proc := Entity (Name);
1800 if Ekind (Proc) /= E_Procedure
1801 or else Present (First_Formal (Proc)) then
1803 ("argument of pragma% must be parameterless procedure", Arg);
1808 Found : Boolean := False;
1810 Index : Interp_Index;
1813 Get_First_Interp (Name, Index, It);
1814 while Present (It.Nam) loop
1817 if Ekind (Proc) = E_Procedure
1818 and then No (First_Formal (Proc))
1822 Set_Entity (Name, Proc);
1823 Set_Is_Overloaded (Name, False);
1826 ("ambiguous handler name for pragma% ", Arg);
1830 Get_Next_Interp (Index, It);
1835 ("argument of pragma% must be parameterless procedure",
1838 Proc := Entity (Name);
1844 end Find_Unique_Parameterless_Procedure;
1846 -------------------------
1847 -- Gather_Associations --
1848 -------------------------
1850 procedure Gather_Associations
1852 Args : out Args_List)
1857 -- Initialize all parameters to Empty
1859 for J in Args'Range loop
1863 -- That's all we have to do if there are no argument associations
1865 if No (Pragma_Argument_Associations (N)) then
1869 -- Otherwise first deal with any positional parameters present
1871 Arg := First (Pragma_Argument_Associations (N));
1872 for Index in Args'Range loop
1873 exit when No (Arg) or else Chars (Arg) /= No_Name;
1874 Args (Index) := Expression (Arg);
1878 -- Positional parameters all processed, if any left, then we
1879 -- have too many positional parameters.
1881 if Present (Arg) and then Chars (Arg) = No_Name then
1883 ("too many positional associations for pragma%", Arg);
1886 -- Process named parameters if any are present
1888 while Present (Arg) loop
1889 if Chars (Arg) = No_Name then
1891 ("positional association cannot follow named association",
1895 for Index in Names'Range loop
1896 if Names (Index) = Chars (Arg) then
1897 if Present (Args (Index)) then
1899 ("duplicate argument association for pragma%", Arg);
1901 Args (Index) := Expression (Arg);
1906 if Index = Names'Last then
1907 Error_Msg_Name_1 := Pname;
1908 Error_Msg_N ("pragma% does not allow & argument", Arg);
1910 -- Check for possible misspelling
1912 for Index1 in Names'Range loop
1913 if Is_Bad_Spelling_Of
1914 (Chars (Arg), Names (Index1))
1916 Error_Msg_Name_1 := Names (Index1);
1917 Error_Msg_N ("\possible misspelling of%", Arg);
1929 end Gather_Associations;
1935 procedure GNAT_Pragma is
1937 Check_Restriction (No_Implementation_Pragmas, N);
1940 --------------------------
1941 -- Is_Before_First_Decl --
1942 --------------------------
1944 function Is_Before_First_Decl
1945 (Pragma_Node : Node_Id;
1946 Decls : List_Id) return Boolean
1948 Item : Node_Id := First (Decls);
1951 -- Only other pragmas can come before this pragma
1954 if No (Item) or else Nkind (Item) /= N_Pragma then
1957 elsif Item = Pragma_Node then
1963 end Is_Before_First_Decl;
1965 -----------------------------
1966 -- Is_Configuration_Pragma --
1967 -----------------------------
1969 -- A configuration pragma must appear in the context clause of a
1970 -- compilation unit, and only other pragmas may precede it. Note that
1971 -- the test below also permits use in a configuration pragma file.
1973 function Is_Configuration_Pragma return Boolean is
1974 Lis : constant List_Id := List_Containing (N);
1975 Par : constant Node_Id := Parent (N);
1979 -- If no parent, then we are in the configuration pragma file,
1980 -- so the placement is definitely appropriate.
1985 -- Otherwise we must be in the context clause of a compilation unit
1986 -- and the only thing allowed before us in the context list is more
1987 -- configuration pragmas.
1989 elsif Nkind (Par) = N_Compilation_Unit
1990 and then Context_Items (Par) = Lis
1997 elsif Nkind (Prg) /= N_Pragma then
2007 end Is_Configuration_Pragma;
2009 --------------------------
2010 -- Is_In_Context_Clause --
2011 --------------------------
2013 function Is_In_Context_Clause return Boolean is
2015 Parent_Node : Node_Id;
2018 if not Is_List_Member (N) then
2022 Plist := List_Containing (N);
2023 Parent_Node := Parent (Plist);
2025 if Parent_Node = Empty
2026 or else Nkind (Parent_Node) /= N_Compilation_Unit
2027 or else Context_Items (Parent_Node) /= Plist
2034 end Is_In_Context_Clause;
2036 ---------------------------------
2037 -- Is_Static_String_Expression --
2038 ---------------------------------
2040 function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
2041 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
2044 Analyze_And_Resolve (Argx);
2045 return Is_OK_Static_Expression (Argx)
2046 and then Nkind (Argx) = N_String_Literal;
2047 end Is_Static_String_Expression;
2049 ----------------------
2050 -- Pragma_Misplaced --
2051 ----------------------
2053 procedure Pragma_Misplaced is
2055 Error_Pragma ("incorrect placement of pragma%");
2056 end Pragma_Misplaced;
2058 ------------------------------------
2059 -- Process Atomic_Shared_Volatile --
2060 ------------------------------------
2062 procedure Process_Atomic_Shared_Volatile is
2069 procedure Set_Atomic (E : Entity_Id);
2070 -- Set given type as atomic, and if no explicit alignment was given,
2071 -- set alignment to unknown, since back end knows what the alignment
2072 -- requirements are for atomic arrays. Note: this step is necessary
2073 -- for derived types.
2079 procedure Set_Atomic (E : Entity_Id) is
2083 if not Has_Alignment_Clause (E) then
2084 Set_Alignment (E, Uint_0);
2088 -- Start of processing for Process_Atomic_Shared_Volatile
2091 Check_Ada_83_Warning;
2092 Check_No_Identifiers;
2093 Check_Arg_Count (1);
2094 Check_Arg_Is_Local_Name (Arg1);
2095 E_Id := Expression (Arg1);
2097 if Etype (E_Id) = Any_Type then
2102 D := Declaration_Node (E);
2106 if Rep_Item_Too_Early (E, N)
2108 Rep_Item_Too_Late (E, N)
2112 Check_First_Subtype (Arg1);
2115 if Prag_Id /= Pragma_Volatile then
2117 Set_Atomic (Underlying_Type (E));
2118 Set_Atomic (Base_Type (E));
2121 -- Attribute belongs on the base type. If the view of the type is
2122 -- currently private, it also belongs on the underlying type.
2124 Set_Is_Volatile (Base_Type (E));
2125 Set_Is_Volatile (Underlying_Type (E));
2127 Set_Treat_As_Volatile (E);
2128 Set_Treat_As_Volatile (Underlying_Type (E));
2130 elsif K = N_Object_Declaration
2131 or else (K = N_Component_Declaration
2132 and then Original_Record_Component (E) = E)
2134 if Rep_Item_Too_Late (E, N) then
2138 if Prag_Id /= Pragma_Volatile then
2141 -- If the object declaration has an explicit initialization, a
2142 -- temporary may have to be created to hold the expression, to
2143 -- ensure that access to the object remain atomic.
2145 if Nkind (Parent (E)) = N_Object_Declaration
2146 and then Present (Expression (Parent (E)))
2148 Set_Has_Delayed_Freeze (E);
2151 -- An interesting improvement here. If an object of type X
2152 -- is declared atomic, and the type X is not atomic, that's
2153 -- a pity, since it may not have appropriate alignment etc.
2154 -- We can rescue this in the special case where the object
2155 -- and type are in the same unit by just setting the type
2156 -- as atomic, so that the back end will process it as atomic.
2158 Utyp := Underlying_Type (Etype (E));
2161 and then Sloc (E) > No_Location
2162 and then Sloc (Utyp) > No_Location
2164 Get_Source_File_Index (Sloc (E)) =
2165 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
2167 Set_Is_Atomic (Underlying_Type (Etype (E)));
2171 Set_Is_Volatile (E);
2172 Set_Treat_As_Volatile (E);
2176 ("inappropriate entity for pragma%", Arg1);
2178 end Process_Atomic_Shared_Volatile;
2180 -------------------------------------------
2181 -- Process_Compile_Time_Warning_Or_Error --
2182 -------------------------------------------
2184 procedure Process_Compile_Time_Warning_Or_Error is
2185 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
2189 Check_Arg_Count (2);
2190 Check_No_Identifiers;
2191 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
2192 Analyze_And_Resolve (Arg1x, Standard_Boolean);
2194 if Compile_Time_Known_Value (Arg1x) then
2195 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
2197 Str : constant String_Id :=
2198 Strval (Get_Pragma_Arg (Arg2));
2199 Len : constant Int := String_Length (Str);
2204 Cent : constant Entity_Id :=
2205 Cunit_Entity (Current_Sem_Unit);
2207 Force : constant Boolean :=
2208 Prag_Id = Pragma_Compile_Time_Warning
2210 Is_Spec_Name (Unit_Name (Current_Sem_Unit))
2211 and then (Ekind (Cent) /= E_Package
2212 or else not In_Private_Part (Cent));
2213 -- Set True if this is the warning case, and we are in the
2214 -- visible part of a package spec, or in a subprogram spec,
2215 -- in which case we want to force the client to see the
2216 -- warning, even though it is not in the main unit.
2219 -- Loop through segments of message separated by line
2220 -- feeds. We output these segments as separate messages
2221 -- with continuation marks for all but the first.
2226 Error_Msg_Strlen := 0;
2228 -- Loop to copy characters from argument to error
2229 -- message string buffer.
2232 exit when Ptr > Len;
2233 CC := Get_String_Char (Str, Ptr);
2236 -- Ignore wide chars ??? else store character
2238 if In_Character_Range (CC) then
2239 C := Get_Character (CC);
2240 exit when C = ASCII.LF;
2241 Error_Msg_Strlen := Error_Msg_Strlen + 1;
2242 Error_Msg_String (Error_Msg_Strlen) := C;
2246 -- Here with one line ready to go
2248 Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning;
2250 -- If this is a warning in a spec, then we want clients
2251 -- to see the warning, so mark the message with the
2252 -- special sequence !! to force the warning. In the case
2253 -- of a package spec, we do not force this if we are in
2254 -- the private part of the spec.
2257 if Cont = False then
2258 Error_Msg_N ("<~!!", Arg1);
2261 Error_Msg_N ("\<~!!", Arg1);
2264 -- Error, rather than warning, or in a body, so we do not
2265 -- need to force visibility for client (error will be
2266 -- output in any case, and this is the situation in which
2267 -- we do not want a client to get a warning, since the
2268 -- warning is in the body or the spec private part.
2271 if Cont = False then
2272 Error_Msg_N ("<~", Arg1);
2275 Error_Msg_N ("\<~", Arg1);
2279 exit when Ptr > Len;
2284 end Process_Compile_Time_Warning_Or_Error;
2286 ------------------------
2287 -- Process_Convention --
2288 ------------------------
2290 procedure Process_Convention
2291 (C : out Convention_Id;
2297 Comp_Unit : Unit_Number_Type;
2299 procedure Set_Convention_From_Pragma (E : Entity_Id);
2300 -- Set convention in entity E, and also flag that the entity has a
2301 -- convention pragma. If entity is for a private or incomplete type,
2302 -- also set convention and flag on underlying type. This procedure
2303 -- also deals with the special case of C_Pass_By_Copy convention.
2305 --------------------------------
2306 -- Set_Convention_From_Pragma --
2307 --------------------------------
2309 procedure Set_Convention_From_Pragma (E : Entity_Id) is
2311 -- Ada 2005 (AI-430): Check invalid attempt to change convention
2312 -- for an overridden dispatching operation. Technically this is
2313 -- an amendment and should only be done in Ada 2005 mode. However,
2314 -- this is clearly a mistake, since the problem that is addressed
2315 -- by this AI is that there is a clear gap in the RM!
2317 if Is_Dispatching_Operation (E)
2318 and then Present (Overridden_Operation (E))
2319 and then C /= Convention (Overridden_Operation (E))
2322 ("cannot change convention for " &
2323 "overridden dispatching operation",
2327 -- Set the convention
2329 Set_Convention (E, C);
2330 Set_Has_Convention_Pragma (E);
2332 if Is_Incomplete_Or_Private_Type (E) then
2333 Set_Convention (Underlying_Type (E), C);
2334 Set_Has_Convention_Pragma (Underlying_Type (E), True);
2337 -- A class-wide type should inherit the convention of
2338 -- the specific root type (although this isn't specified
2339 -- clearly by the RM).
2341 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
2342 Set_Convention (Class_Wide_Type (E), C);
2345 -- If the entity is a record type, then check for special case of
2346 -- C_Pass_By_Copy, which is treated the same as C except that the
2347 -- special record flag is set. This convention is only permitted
2348 -- on record types (see AI95-00131).
2350 if Cname = Name_C_Pass_By_Copy then
2351 if Is_Record_Type (E) then
2352 Set_C_Pass_By_Copy (Base_Type (E));
2353 elsif Is_Incomplete_Or_Private_Type (E)
2354 and then Is_Record_Type (Underlying_Type (E))
2356 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
2359 ("C_Pass_By_Copy convention allowed only for record type",
2364 -- If the entity is a derived boolean type, check for the
2365 -- special case of convention C, C++, or Fortran, where we
2366 -- consider any nonzero value to represent true.
2368 if Is_Discrete_Type (E)
2369 and then Root_Type (Etype (E)) = Standard_Boolean
2375 C = Convention_Fortran)
2377 Set_Nonzero_Is_True (Base_Type (E));
2379 end Set_Convention_From_Pragma;
2381 -- Start of processing for Process_Convention
2384 Check_At_Least_N_Arguments (2);
2385 Check_Optional_Identifier (Arg1, Name_Convention);
2386 Check_Arg_Is_Identifier (Arg1);
2387 Cname := Chars (Expression (Arg1));
2389 -- C_Pass_By_Copy is treated as a synonym for convention C
2390 -- (this is tested again below to set the critical flag)
2392 if Cname = Name_C_Pass_By_Copy then
2395 -- Otherwise we must have something in the standard convention list
2397 elsif Is_Convention_Name (Cname) then
2398 C := Get_Convention_Id (Chars (Expression (Arg1)));
2400 -- In DEC VMS, it seems that there is an undocumented feature that
2401 -- any unrecognized convention is treated as the default, which for
2402 -- us is convention C. It does not seem so terrible to do this
2403 -- unconditionally, silently in the VMS case, and with a warning
2404 -- in the non-VMS case.
2407 if Warn_On_Export_Import and not OpenVMS_On_Target then
2409 ("?unrecognized convention name, C assumed",
2416 Check_Optional_Identifier (Arg2, Name_Entity);
2417 Check_Arg_Is_Local_Name (Arg2);
2419 Id := Expression (Arg2);
2422 if not Is_Entity_Name (Id) then
2423 Error_Pragma_Arg ("entity name required", Arg2);
2428 -- Go to renamed subprogram if present, since convention applies to
2429 -- the actual renamed entity, not to the renaming entity. If the
2430 -- subprogram is inherited, go to parent subprogram.
2432 if Is_Subprogram (E)
2433 and then Present (Alias (E))
2435 if Nkind (Parent (Declaration_Node (E))) =
2436 N_Subprogram_Renaming_Declaration
2438 if Scope (E) /= Scope (Alias (E)) then
2440 ("cannot apply pragma% to non-local renaming&#", E);
2444 elsif Nkind (Parent (E)) = N_Full_Type_Declaration
2445 and then Scope (E) = Scope (Alias (E))
2451 -- Check that we are not applying this to a specless body
2453 if Is_Subprogram (E)
2454 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2457 ("pragma% requires separate spec and must come before body");
2460 -- Check that we are not applying this to a named constant
2462 if Ekind (E) = E_Named_Integer
2464 Ekind (E) = E_Named_Real
2466 Error_Msg_Name_1 := Pname;
2468 ("cannot apply pragma% to named constant!",
2469 Get_Pragma_Arg (Arg2));
2471 ("\supply appropriate type for&!", Arg2);
2474 if Ekind (E) = E_Enumeration_Literal then
2475 Error_Pragma ("enumeration literal not allowed for pragma%");
2478 -- Check for rep item appearing too early or too late
2480 if Etype (E) = Any_Type
2481 or else Rep_Item_Too_Early (E, N)
2485 E := Underlying_Type (E);
2488 if Rep_Item_Too_Late (E, N) then
2492 if Has_Convention_Pragma (E) then
2494 ("at most one Convention/Export/Import pragma is allowed", Arg2);
2496 elsif Convention (E) = Convention_Protected
2497 or else Ekind (Scope (E)) = E_Protected_Type
2500 ("a protected operation cannot be given a different convention",
2504 -- For Intrinsic, a subprogram is required
2506 if C = Convention_Intrinsic
2507 and then not Is_Subprogram (E)
2508 and then not Is_Generic_Subprogram (E)
2511 ("second argument of pragma% must be a subprogram", Arg2);
2514 -- For Stdcall, a subprogram, variable or subprogram type is required
2516 if C = Convention_Stdcall
2517 and then not Is_Subprogram (E)
2518 and then not Is_Generic_Subprogram (E)
2519 and then Ekind (E) /= E_Variable
2522 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2525 ("second argument of pragma% must be subprogram (type)",
2529 if not Is_Subprogram (E)
2530 and then not Is_Generic_Subprogram (E)
2532 Set_Convention_From_Pragma (E);
2536 Check_First_Subtype (Arg2);
2537 Set_Convention_From_Pragma (Base_Type (E));
2539 -- For subprograms, we must set the convention on the
2540 -- internally generated directly designated type as well.
2542 if Ekind (E) = E_Access_Subprogram_Type then
2543 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2547 -- For the subprogram case, set proper convention for all homonyms
2548 -- in same scope and the same declarative part, i.e. the same
2549 -- compilation unit.
2552 Comp_Unit := Get_Source_Unit (E);
2553 Set_Convention_From_Pragma (E);
2555 -- Treat a pragma Import as an implicit body, for GPS use
2557 if Prag_Id = Pragma_Import then
2558 Generate_Reference (E, Id, 'b');
2564 exit when No (E1) or else Scope (E1) /= Current_Scope;
2566 -- Do not set the pragma on inherited operations or on
2567 -- formal subprograms.
2569 if Comes_From_Source (E1)
2570 and then Comp_Unit = Get_Source_Unit (E1)
2571 and then not Is_Formal_Subprogram (E1)
2572 and then Nkind (Original_Node (Parent (E1))) /=
2573 N_Full_Type_Declaration
2575 if Present (Alias (E1))
2576 and then Scope (E1) /= Scope (Alias (E1))
2579 ("cannot apply pragma% to non-local renaming&#", E1);
2581 Set_Convention_From_Pragma (E1);
2583 if Prag_Id = Pragma_Import then
2584 Generate_Reference (E, Id, 'b');
2589 end Process_Convention;
2591 -----------------------------------------------------
2592 -- Process_Extended_Import_Export_Exception_Pragma --
2593 -----------------------------------------------------
2595 procedure Process_Extended_Import_Export_Exception_Pragma
2596 (Arg_Internal : Node_Id;
2597 Arg_External : Node_Id;
2607 if not OpenVMS_On_Target then
2609 ("?pragma% ignored (applies only to Open'V'M'S)");
2612 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2613 Def_Id := Entity (Arg_Internal);
2615 if Ekind (Def_Id) /= E_Exception then
2617 ("pragma% must refer to declared exception", Arg_Internal);
2620 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2622 if Present (Arg_Form) then
2623 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2626 if Present (Arg_Form)
2627 and then Chars (Arg_Form) = Name_Ada
2631 Set_Is_VMS_Exception (Def_Id);
2632 Set_Exception_Code (Def_Id, No_Uint);
2635 if Present (Arg_Code) then
2636 if not Is_VMS_Exception (Def_Id) then
2638 ("Code option for pragma% not allowed for Ada case",
2642 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2643 Code_Val := Expr_Value (Arg_Code);
2645 if not UI_Is_In_Int_Range (Code_Val) then
2647 ("Code option for pragma% must be in 32-bit range",
2651 Set_Exception_Code (Def_Id, Code_Val);
2654 end Process_Extended_Import_Export_Exception_Pragma;
2656 -------------------------------------------------
2657 -- Process_Extended_Import_Export_Internal_Arg --
2658 -------------------------------------------------
2660 procedure Process_Extended_Import_Export_Internal_Arg
2661 (Arg_Internal : Node_Id := Empty)
2666 if No (Arg_Internal) then
2667 Error_Pragma ("Internal parameter required for pragma%");
2670 if Nkind (Arg_Internal) = N_Identifier then
2673 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2674 and then (Prag_Id = Pragma_Import_Function
2676 Prag_Id = Pragma_Export_Function)
2682 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2685 Check_Arg_Is_Local_Name (Arg_Internal);
2686 end Process_Extended_Import_Export_Internal_Arg;
2688 --------------------------------------------------
2689 -- Process_Extended_Import_Export_Object_Pragma --
2690 --------------------------------------------------
2692 procedure Process_Extended_Import_Export_Object_Pragma
2693 (Arg_Internal : Node_Id;
2694 Arg_External : Node_Id;
2700 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2701 Def_Id := Entity (Arg_Internal);
2703 if Ekind (Def_Id) /= E_Constant
2704 and then Ekind (Def_Id) /= E_Variable
2707 ("pragma% must designate an object", Arg_Internal);
2710 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2712 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2715 ("previous Common/Psect_Object applies, pragma % not permitted",
2719 if Rep_Item_Too_Late (Def_Id, N) then
2723 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2725 if Present (Arg_Size) then
2726 Check_Arg_Is_External_Name (Arg_Size);
2729 -- Export_Object case
2731 if Prag_Id = Pragma_Export_Object then
2732 if not Is_Library_Level_Entity (Def_Id) then
2734 ("argument for pragma% must be library level entity",
2738 if Ekind (Current_Scope) = E_Generic_Package then
2739 Error_Pragma ("pragma& cannot appear in a generic unit");
2742 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2744 ("exported object must have compile time known size",
2748 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2750 ("?duplicate Export_Object pragma", N);
2752 Set_Exported (Def_Id, Arg_Internal);
2755 -- Import_Object case
2758 if Is_Concurrent_Type (Etype (Def_Id)) then
2760 ("cannot use pragma% for task/protected object",
2764 if Ekind (Def_Id) = E_Constant then
2766 ("cannot import a constant", Arg_Internal);
2769 if Warn_On_Export_Import
2770 and then Has_Discriminants (Etype (Def_Id))
2773 ("imported value must be initialized?", Arg_Internal);
2776 if Warn_On_Export_Import
2777 and then Is_Access_Type (Etype (Def_Id))
2780 ("cannot import object of an access type?", Arg_Internal);
2783 if Warn_On_Export_Import
2784 and then Is_Imported (Def_Id)
2787 ("?duplicate Import_Object pragma", N);
2789 -- Check for explicit initialization present. Note that an
2790 -- initialization that generated by the code generator, e.g.
2791 -- for an access type, does not count here.
2793 elsif Present (Expression (Parent (Def_Id)))
2796 (Original_Node (Expression (Parent (Def_Id))))
2798 Error_Msg_Sloc := Sloc (Def_Id);
2800 ("imported entities cannot be initialized (RM B.1(24))",
2801 "\no initialization allowed for & declared#", Arg1);
2803 Set_Imported (Def_Id);
2804 Note_Possible_Modification (Arg_Internal, Sure => False);
2807 end Process_Extended_Import_Export_Object_Pragma;
2809 ------------------------------------------------------
2810 -- Process_Extended_Import_Export_Subprogram_Pragma --
2811 ------------------------------------------------------
2813 procedure Process_Extended_Import_Export_Subprogram_Pragma
2814 (Arg_Internal : Node_Id;
2815 Arg_External : Node_Id;
2816 Arg_Parameter_Types : Node_Id;
2817 Arg_Result_Type : Node_Id := Empty;
2818 Arg_Mechanism : Node_Id;
2819 Arg_Result_Mechanism : Node_Id := Empty;
2820 Arg_First_Optional_Parameter : Node_Id := Empty)
2826 Ambiguous : Boolean;
2830 function Same_Base_Type
2832 Formal : Entity_Id) return Boolean;
2833 -- Determines if Ptype references the type of Formal. Note that
2834 -- only the base types need to match according to the spec. Ptype
2835 -- here is the argument from the pragma, which is either a type
2836 -- name, or an access attribute.
2838 --------------------
2839 -- Same_Base_Type --
2840 --------------------
2842 function Same_Base_Type
2844 Formal : Entity_Id) return Boolean
2846 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2850 -- Case where pragma argument is typ'Access
2852 if Nkind (Ptype) = N_Attribute_Reference
2853 and then Attribute_Name (Ptype) = Name_Access
2855 Pref := Prefix (Ptype);
2858 if not Is_Entity_Name (Pref)
2859 or else Entity (Pref) = Any_Type
2864 -- We have a match if the corresponding argument is of an
2865 -- anonymous access type, and its designated type matches
2866 -- the type of the prefix of the access attribute
2868 return Ekind (Ftyp) = E_Anonymous_Access_Type
2869 and then Base_Type (Entity (Pref)) =
2870 Base_Type (Etype (Designated_Type (Ftyp)));
2872 -- Case where pragma argument is a type name
2877 if not Is_Entity_Name (Ptype)
2878 or else Entity (Ptype) = Any_Type
2883 -- We have a match if the corresponding argument is of
2884 -- the type given in the pragma (comparing base types)
2886 return Base_Type (Entity (Ptype)) = Ftyp;
2890 -- Start of processing for
2891 -- Process_Extended_Import_Export_Subprogram_Pragma
2894 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2898 -- Loop through homonyms (overloadings) of the entity
2900 Hom_Id := Entity (Arg_Internal);
2901 while Present (Hom_Id) loop
2902 Def_Id := Get_Base_Subprogram (Hom_Id);
2904 -- We need a subprogram in the current scope
2906 if not Is_Subprogram (Def_Id)
2907 or else Scope (Def_Id) /= Current_Scope
2914 -- Pragma cannot apply to subprogram body
2916 if Is_Subprogram (Def_Id)
2919 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2922 ("pragma% requires separate spec"
2923 & " and must come before body");
2926 -- Test result type if given, note that the result type
2927 -- parameter can only be present for the function cases.
2929 if Present (Arg_Result_Type)
2930 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2934 elsif Etype (Def_Id) /= Standard_Void_Type
2936 (Pname = Name_Export_Procedure
2938 Pname = Name_Import_Procedure)
2942 -- Test parameter types if given. Note that this parameter
2943 -- has not been analyzed (and must not be, since it is
2944 -- semantic nonsense), so we get it as the parser left it.
2946 elsif Present (Arg_Parameter_Types) then
2947 Check_Matching_Types : declare
2952 Formal := First_Formal (Def_Id);
2954 if Nkind (Arg_Parameter_Types) = N_Null then
2955 if Present (Formal) then
2959 -- A list of one type, e.g. (List) is parsed as
2960 -- a parenthesized expression.
2962 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2963 and then Paren_Count (Arg_Parameter_Types) = 1
2966 or else Present (Next_Formal (Formal))
2971 Same_Base_Type (Arg_Parameter_Types, Formal);
2974 -- A list of more than one type is parsed as a aggregate
2976 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2977 and then Paren_Count (Arg_Parameter_Types) = 0
2979 Ptype := First (Expressions (Arg_Parameter_Types));
2980 while Present (Ptype) or else Present (Formal) loop
2983 or else not Same_Base_Type (Ptype, Formal)
2988 Next_Formal (Formal);
2993 -- Anything else is of the wrong form
2997 ("wrong form for Parameter_Types parameter",
2998 Arg_Parameter_Types);
3000 end Check_Matching_Types;
3003 -- Match is now False if the entry we found did not match
3004 -- either a supplied Parameter_Types or Result_Types argument
3010 -- Ambiguous case, the flag Ambiguous shows if we already
3011 -- detected this and output the initial messages.
3014 if not Ambiguous then
3016 Error_Msg_Name_1 := Pname;
3018 ("pragma% does not uniquely identify subprogram!",
3020 Error_Msg_Sloc := Sloc (Ent);
3021 Error_Msg_N ("matching subprogram #!", N);
3025 Error_Msg_Sloc := Sloc (Def_Id);
3026 Error_Msg_N ("matching subprogram #!", N);
3031 Hom_Id := Homonym (Hom_Id);
3034 -- See if we found an entry
3037 if not Ambiguous then
3038 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
3040 ("pragma% cannot be given for generic subprogram");
3043 ("pragma% does not identify local subprogram");
3050 -- Import pragmas must be be for imported entities
3052 if Prag_Id = Pragma_Import_Function
3054 Prag_Id = Pragma_Import_Procedure
3056 Prag_Id = Pragma_Import_Valued_Procedure
3058 if not Is_Imported (Ent) then
3060 ("pragma Import or Interface must precede pragma%");
3063 -- Here we have the Export case which can set the entity as exported
3065 -- But does not do so if the specified external name is null, since
3066 -- that is taken as a signal in DEC Ada 83 (with which we want to be
3067 -- compatible) to request no external name.
3069 elsif Nkind (Arg_External) = N_String_Literal
3070 and then String_Length (Strval (Arg_External)) = 0
3074 -- In all other cases, set entity as exported
3077 Set_Exported (Ent, Arg_Internal);
3080 -- Special processing for Valued_Procedure cases
3082 if Prag_Id = Pragma_Import_Valued_Procedure
3084 Prag_Id = Pragma_Export_Valued_Procedure
3086 Formal := First_Formal (Ent);
3090 ("at least one parameter required for pragma%");
3092 elsif Ekind (Formal) /= E_Out_Parameter then
3094 ("first parameter must have mode out for pragma%");
3097 Set_Is_Valued_Procedure (Ent);
3101 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
3103 -- Process Result_Mechanism argument if present. We have already
3104 -- checked that this is only allowed for the function case.
3106 if Present (Arg_Result_Mechanism) then
3107 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
3110 -- Process Mechanism parameter if present. Note that this parameter
3111 -- is not analyzed, and must not be analyzed since it is semantic
3112 -- nonsense, so we get it in exactly as the parser left it.
3114 if Present (Arg_Mechanism) then
3122 -- A single mechanism association without a formal parameter
3123 -- name is parsed as a parenthesized expression. All other
3124 -- cases are parsed as aggregates, so we rewrite the single
3125 -- parameter case as an aggregate for consistency.
3127 if Nkind (Arg_Mechanism) /= N_Aggregate
3128 and then Paren_Count (Arg_Mechanism) = 1
3130 Rewrite (Arg_Mechanism,
3131 Make_Aggregate (Sloc (Arg_Mechanism),
3132 Expressions => New_List (
3133 Relocate_Node (Arg_Mechanism))));
3136 -- Case of only mechanism name given, applies to all formals
3138 if Nkind (Arg_Mechanism) /= N_Aggregate then
3139 Formal := First_Formal (Ent);
3140 while Present (Formal) loop
3141 Set_Mechanism_Value (Formal, Arg_Mechanism);
3142 Next_Formal (Formal);
3145 -- Case of list of mechanism associations given
3148 if Null_Record_Present (Arg_Mechanism) then
3150 ("inappropriate form for Mechanism parameter",
3154 -- Deal with positional ones first
3156 Formal := First_Formal (Ent);
3158 if Present (Expressions (Arg_Mechanism)) then
3159 Mname := First (Expressions (Arg_Mechanism));
3160 while Present (Mname) loop
3163 ("too many mechanism associations", Mname);
3166 Set_Mechanism_Value (Formal, Mname);
3167 Next_Formal (Formal);
3172 -- Deal with named entries
3174 if Present (Component_Associations (Arg_Mechanism)) then
3175 Massoc := First (Component_Associations (Arg_Mechanism));
3176 while Present (Massoc) loop
3177 Choice := First (Choices (Massoc));
3179 if Nkind (Choice) /= N_Identifier
3180 or else Present (Next (Choice))
3183 ("incorrect form for mechanism association",
3187 Formal := First_Formal (Ent);
3191 ("parameter name & not present", Choice);
3194 if Chars (Choice) = Chars (Formal) then
3196 (Formal, Expression (Massoc));
3200 Next_Formal (Formal);
3210 -- Process First_Optional_Parameter argument if present. We have
3211 -- already checked that this is only allowed for the Import case.
3213 if Present (Arg_First_Optional_Parameter) then
3214 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
3216 ("first optional parameter must be formal parameter name",
3217 Arg_First_Optional_Parameter);
3220 Formal := First_Formal (Ent);
3224 ("specified formal parameter& not found",
3225 Arg_First_Optional_Parameter);
3228 exit when Chars (Formal) =
3229 Chars (Arg_First_Optional_Parameter);
3231 Next_Formal (Formal);
3234 Set_First_Optional_Parameter (Ent, Formal);
3236 -- Check specified and all remaining formals have right form
3238 while Present (Formal) loop
3239 if Ekind (Formal) /= E_In_Parameter then
3241 ("optional formal& is not of mode in!",
3242 Arg_First_Optional_Parameter, Formal);
3245 Dval := Default_Value (Formal);
3249 ("optional formal& does not have default value!",
3250 Arg_First_Optional_Parameter, Formal);
3252 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
3257 ("default value for optional formal& is non-static!",
3258 Arg_First_Optional_Parameter, Formal);
3262 Set_Is_Optional_Parameter (Formal);
3263 Next_Formal (Formal);
3266 end Process_Extended_Import_Export_Subprogram_Pragma;
3268 --------------------------
3269 -- Process_Generic_List --
3270 --------------------------
3272 procedure Process_Generic_List is
3278 Check_No_Identifiers;
3279 Check_At_Least_N_Arguments (1);
3282 while Present (Arg) loop
3283 Exp := Expression (Arg);
3286 if not Is_Entity_Name (Exp)
3288 (not Is_Generic_Instance (Entity (Exp))
3290 not Is_Generic_Unit (Entity (Exp)))
3293 ("pragma% argument must be name of generic unit/instance",
3299 end Process_Generic_List;
3301 ---------------------------------
3302 -- Process_Import_Or_Interface --
3303 ---------------------------------
3305 procedure Process_Import_Or_Interface is
3311 Process_Convention (C, Def_Id);
3312 Kill_Size_Check_Code (Def_Id);
3313 Note_Possible_Modification (Expression (Arg2), Sure => False);
3315 if Ekind (Def_Id) = E_Variable
3317 Ekind (Def_Id) = E_Constant
3319 -- We do not permit Import to apply to a renaming declaration
3321 if Present (Renamed_Object (Def_Id)) then
3323 ("pragma% not allowed for object renaming", Arg2);
3325 -- User initialization is not allowed for imported object, but
3326 -- the object declaration may contain a default initialization,
3327 -- that will be discarded. Note that an explicit initialization
3328 -- only counts if it comes from source, otherwise it is simply
3329 -- the code generator making an implicit initialization explicit.
3331 elsif Present (Expression (Parent (Def_Id)))
3332 and then Comes_From_Source (Expression (Parent (Def_Id)))
3334 Error_Msg_Sloc := Sloc (Def_Id);
3336 ("no initialization allowed for declaration of& #",
3337 "\imported entities cannot be initialized (RM B.1(24))",
3341 Set_Imported (Def_Id);
3342 Process_Interface_Name (Def_Id, Arg3, Arg4);
3344 -- Note that we do not set Is_Public here. That's because we
3345 -- only want to set if if there is no address clause, and we
3346 -- don't know that yet, so we delay that processing till
3349 -- pragma Import completes deferred constants
3351 if Ekind (Def_Id) = E_Constant then
3352 Set_Has_Completion (Def_Id);
3355 -- It is not possible to import a constant of an unconstrained
3356 -- array type (e.g. string) because there is no simple way to
3357 -- write a meaningful subtype for it.
3359 if Is_Array_Type (Etype (Def_Id))
3360 and then not Is_Constrained (Etype (Def_Id))
3363 ("imported constant& must have a constrained subtype",
3368 elsif Is_Subprogram (Def_Id)
3369 or else Is_Generic_Subprogram (Def_Id)
3371 -- If the name is overloaded, pragma applies to all of the
3372 -- denoted entities in the same declarative part.
3375 while Present (Hom_Id) loop
3376 Def_Id := Get_Base_Subprogram (Hom_Id);
3378 -- Ignore inherited subprograms because the pragma will
3379 -- apply to the parent operation, which is the one called.
3381 if Is_Overloadable (Def_Id)
3382 and then Present (Alias (Def_Id))
3386 -- If it is not a subprogram, it must be in an outer
3387 -- scope and pragma does not apply.
3389 elsif not Is_Subprogram (Def_Id)
3390 and then not Is_Generic_Subprogram (Def_Id)
3394 -- Verify that the homonym is in the same declarative
3395 -- part (not just the same scope).
3397 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
3398 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
3403 Set_Imported (Def_Id);
3405 -- Special processing for Convention_Intrinsic
3407 if C = Convention_Intrinsic then
3409 -- Link_Name argument not allowed for intrinsic
3412 and then Chars (Arg3) = Name_Link_Name
3417 if Present (Arg4) then
3419 ("Link_Name argument not allowed for " &
3424 Set_Is_Intrinsic_Subprogram (Def_Id);
3426 -- If no external name is present, then check that
3427 -- this is a valid intrinsic subprogram. If an external
3428 -- name is present, then this is handled by the back end.
3431 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
3435 -- All interfaced procedures need an external symbol
3436 -- created for them since they are always referenced
3437 -- from another object file.
3439 Set_Is_Public (Def_Id);
3441 -- Verify that the subprogram does not have a completion
3442 -- through a renaming declaration. For other completions
3443 -- the pragma appears as a too late representation.
3446 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3450 and then Nkind (Decl) = N_Subprogram_Declaration
3451 and then Present (Corresponding_Body (Decl))
3454 (Unit_Declaration_Node
3455 (Corresponding_Body (Decl))) =
3456 N_Subprogram_Renaming_Declaration
3458 Error_Msg_Sloc := Sloc (Def_Id);
3460 ("cannot import&, renaming already provided for " &
3461 "declaration #", N, Def_Id);
3465 Set_Has_Completion (Def_Id);
3466 Process_Interface_Name (Def_Id, Arg3, Arg4);
3469 if Is_Compilation_Unit (Hom_Id) then
3471 -- Its possible homonyms are not affected by the pragma.
3472 -- Such homonyms might be present in the context of other
3473 -- units being compiled.
3478 Hom_Id := Homonym (Hom_Id);
3482 -- When the convention is Java or CIL, we also allow Import to be
3483 -- given for packages, generic packages, exceptions, and record
3486 elsif (C = Convention_Java or else C = Convention_CIL)
3488 (Ekind (Def_Id) = E_Package
3489 or else Ekind (Def_Id) = E_Generic_Package
3490 or else Ekind (Def_Id) = E_Exception
3491 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3493 Set_Imported (Def_Id);
3494 Set_Is_Public (Def_Id);
3495 Process_Interface_Name (Def_Id, Arg3, Arg4);
3497 -- Import a CPP class
3499 elsif Is_Record_Type (Def_Id)
3500 and then C = Convention_CPP
3502 if not Is_Tagged_Type (Def_Id) then
3503 Error_Msg_Sloc := Sloc (Def_Id);
3504 Error_Pragma_Arg ("imported 'C'P'P type must be tagged", Arg2);
3507 -- Types treated as CPP classes are treated as limited, but we
3508 -- don't require them to be declared this way. A warning is
3509 -- issued to encourage the user to declare them as limited.
3510 -- This is not an error, for compatibility reasons, because
3511 -- these types have been supported this way for some time.
3513 if not Is_Limited_Type (Def_Id) then
3515 ("imported 'C'P'P type should be " &
3516 "explicitly declared limited?",
3517 Get_Pragma_Arg (Arg2));
3519 ("\type will be considered limited",
3520 Get_Pragma_Arg (Arg2));
3523 Set_Is_CPP_Class (Def_Id);
3524 Set_Is_Limited_Record (Def_Id);
3529 ("second argument of pragma% must be object or subprogram",
3533 -- If this pragma applies to a compilation unit, then the unit,
3534 -- which is a subprogram, does not require (or allow) a body.
3535 -- We also do not need to elaborate imported procedures.
3537 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3539 Cunit : constant Node_Id := Parent (Parent (N));
3541 Set_Body_Required (Cunit, False);
3544 end Process_Import_Or_Interface;
3546 --------------------
3547 -- Process_Inline --
3548 --------------------
3550 procedure Process_Inline (Active : Boolean) is
3556 Effective : Boolean := False;
3558 procedure Make_Inline (Subp : Entity_Id);
3559 -- Subp is the defining unit name of the subprogram
3560 -- declaration. Set the flag, as well as the flag in the
3561 -- corresponding body, if there is one present.
3563 procedure Set_Inline_Flags (Subp : Entity_Id);
3564 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp and also
3565 -- Has_Pragma_Inline_Always for the Inline_Always case.
3567 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3568 -- Returns True if it can be determined at this stage that inlining
3569 -- is not possible, for example if the body is available and contains
3570 -- exception handlers, we prevent inlining, since otherwise we can
3571 -- get undefined symbols at link time. This function also emits a
3572 -- warning if front-end inlining is enabled and the pragma appears
3575 -- ??? is business with link symbols still valid, or does it relate
3576 -- to front end ZCX which is being phased out ???
3578 ---------------------------
3579 -- Inlining_Not_Possible --
3580 ---------------------------
3582 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3583 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3587 if Nkind (Decl) = N_Subprogram_Body then
3588 Stats := Handled_Statement_Sequence (Decl);
3589 return Present (Exception_Handlers (Stats))
3590 or else Present (At_End_Proc (Stats));
3592 elsif Nkind (Decl) = N_Subprogram_Declaration
3593 and then Present (Corresponding_Body (Decl))
3595 if Front_End_Inlining
3596 and then Analyzed (Corresponding_Body (Decl))
3598 Error_Msg_N ("pragma appears too late, ignored?", N);
3601 -- If the subprogram is a renaming as body, the body is
3602 -- just a call to the renamed subprogram, and inlining is
3603 -- trivially possible.
3606 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
3607 N_Subprogram_Renaming_Declaration
3613 Handled_Statement_Sequence
3614 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3617 Present (Exception_Handlers (Stats))
3618 or else Present (At_End_Proc (Stats));
3622 -- If body is not available, assume the best, the check is
3623 -- performed again when compiling enclosing package bodies.
3627 end Inlining_Not_Possible;
3633 procedure Make_Inline (Subp : Entity_Id) is
3634 Kind : constant Entity_Kind := Ekind (Subp);
3635 Inner_Subp : Entity_Id := Subp;
3638 -- Ignore if bad type, avoid cascaded error
3640 if Etype (Subp) = Any_Type then
3644 -- Ignore if all inlining is suppressed
3646 elsif Suppress_All_Inlining then
3650 -- If inlining is not possible, for now do not treat as an error
3652 elsif Inlining_Not_Possible (Subp) then
3656 -- Here we have a candidate for inlining, but we must exclude
3657 -- derived operations. Otherwise we would end up trying to inline
3658 -- a phantom declaration, and the result would be to drag in a
3659 -- body which has no direct inlining associated with it. That
3660 -- would not only be inefficient but would also result in the
3661 -- backend doing cross-unit inlining in cases where it was
3662 -- definitely inappropriate to do so.
3664 -- However, a simple Comes_From_Source test is insufficient, since
3665 -- we do want to allow inlining of generic instances which also do
3666 -- not come from source. We also need to recognize specs
3667 -- generated by the front-end for bodies that carry the pragma.
3668 -- Finally, predefined operators do not come from source but are
3669 -- not inlineable either.
3671 elsif Is_Generic_Instance (Subp)
3672 or else Nkind (Parent (Parent (Subp))) = N_Subprogram_Declaration
3676 elsif not Comes_From_Source (Subp)
3677 and then Scope (Subp) /= Standard_Standard
3683 -- The referenced entity must either be the enclosing entity,
3684 -- or an entity declared within the current open scope.
3686 if Present (Scope (Subp))
3687 and then Scope (Subp) /= Current_Scope
3688 and then Subp /= Current_Scope
3691 ("argument of% must be entity in current scope", Assoc);
3695 -- Processing for procedure, operator or function.
3696 -- If subprogram is aliased (as for an instance) indicate
3697 -- that the renamed entity (if declared in the same unit)
3700 if Is_Subprogram (Subp) then
3701 while Present (Alias (Inner_Subp)) loop
3702 Inner_Subp := Alias (Inner_Subp);
3705 if In_Same_Source_Unit (Subp, Inner_Subp) then
3706 Set_Inline_Flags (Inner_Subp);
3708 Decl := Parent (Parent (Inner_Subp));
3710 if Nkind (Decl) = N_Subprogram_Declaration
3711 and then Present (Corresponding_Body (Decl))
3713 Set_Inline_Flags (Corresponding_Body (Decl));
3719 -- For a generic subprogram set flag as well, for use at
3720 -- the point of instantiation, to determine whether the
3721 -- body should be generated.
3723 elsif Is_Generic_Subprogram (Subp) then
3724 Set_Inline_Flags (Subp);
3727 -- Literals are by definition inlined
3729 elsif Kind = E_Enumeration_Literal then
3732 -- Anything else is an error
3736 ("expect subprogram name for pragma%", Assoc);
3740 ----------------------
3741 -- Set_Inline_Flags --
3742 ----------------------
3744 procedure Set_Inline_Flags (Subp : Entity_Id) is
3747 Set_Is_Inlined (Subp, True);
3750 if not Has_Pragma_Inline (Subp) then
3751 Set_Has_Pragma_Inline (Subp);
3755 if Prag_Id = Pragma_Inline_Always then
3756 Set_Has_Pragma_Inline_Always (Subp);
3758 end Set_Inline_Flags;
3760 -- Start of processing for Process_Inline
3763 Check_No_Identifiers;
3764 Check_At_Least_N_Arguments (1);
3767 Inline_Processing_Required := True;
3771 while Present (Assoc) loop
3772 Subp_Id := Expression (Assoc);
3776 if Is_Entity_Name (Subp_Id) then
3777 Subp := Entity (Subp_Id);
3779 if Subp = Any_Id then
3781 -- If previous error, avoid cascaded errors
3789 while Present (Homonym (Subp))
3790 and then Scope (Homonym (Subp)) = Current_Scope
3792 Make_Inline (Homonym (Subp));
3793 Subp := Homonym (Subp);
3800 ("inappropriate argument for pragma%", Assoc);
3803 and then Warn_On_Redundant_Constructs
3804 and then not Suppress_All_Inlining
3806 if Inlining_Not_Possible (Subp) then
3808 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
3811 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
3819 ----------------------------
3820 -- Process_Interface_Name --
3821 ----------------------------
3823 procedure Process_Interface_Name
3824 (Subprogram_Def : Entity_Id;
3830 String_Val : String_Id;
3832 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3833 -- SN is a string literal node for an interface name. This routine
3834 -- performs some minimal checks that the name is reasonable. In
3835 -- particular that no spaces or other obviously incorrect characters
3836 -- appear. This is only a warning, since any characters are allowed.
3838 ----------------------------------
3839 -- Check_Form_Of_Interface_Name --
3840 ----------------------------------
3842 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3843 S : constant String_Id := Strval (Expr_Value_S (SN));
3844 SL : constant Nat := String_Length (S);
3849 Error_Msg_N ("interface name cannot be null string", SN);
3852 for J in 1 .. SL loop
3853 C := Get_String_Char (S, J);
3855 if Warn_On_Export_Import
3857 (not In_Character_Range (C)
3858 or else (Get_Character (C) = ' '
3859 and then VM_Target /= CLI_Target)
3860 or else Get_Character (C) = ',')
3863 ("?interface name contains illegal character", SN);
3866 end Check_Form_Of_Interface_Name;
3868 -- Start of processing for Process_Interface_Name
3871 if No (Link_Arg) then
3872 if No (Ext_Arg) then
3873 if VM_Target = CLI_Target
3874 and then Ekind (Subprogram_Def) = E_Package
3875 and then Nkind (Parent (Subprogram_Def)) =
3876 N_Package_Specification
3877 and then Present (Generic_Parent (Parent (Subprogram_Def)))
3882 (Generic_Parent (Parent (Subprogram_Def))));
3887 elsif Chars (Ext_Arg) = Name_Link_Name then
3889 Link_Nam := Expression (Ext_Arg);
3892 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3893 Ext_Nam := Expression (Ext_Arg);
3898 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3899 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3900 Ext_Nam := Expression (Ext_Arg);
3901 Link_Nam := Expression (Link_Arg);
3904 -- Check expressions for external name and link name are static
3906 if Present (Ext_Nam) then
3907 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3908 Check_Form_Of_Interface_Name (Ext_Nam);
3910 -- Verify that the external name is not the name of a local
3911 -- entity, which would hide the imported one and lead to
3912 -- run-time surprises. The problem can only arise for entities
3913 -- declared in a package body (otherwise the external name is
3914 -- fully qualified and won't conflict).
3922 if Prag_Id = Pragma_Import then
3923 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3925 E := Entity_Id (Get_Name_Table_Info (Nam));
3927 if Nam /= Chars (Subprogram_Def)
3928 and then Present (E)
3929 and then not Is_Overloadable (E)
3930 and then Is_Immediately_Visible (E)
3931 and then not Is_Imported (E)
3932 and then Ekind (Scope (E)) = E_Package
3935 while Present (Par) loop
3936 if Nkind (Par) = N_Package_Body then
3937 Error_Msg_Sloc := Sloc (E);
3939 ("imported entity is hidden by & declared#",
3944 Par := Parent (Par);
3951 if Present (Link_Nam) then
3952 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3953 Check_Form_Of_Interface_Name (Link_Nam);
3956 -- If there is no link name, just set the external name
3958 if No (Link_Nam) then
3959 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
3961 -- For the Link_Name case, the given literal is preceded by an
3962 -- asterisk, which indicates to GCC that the given name should
3963 -- be taken literally, and in particular that no prepending of
3964 -- underlines should occur, even in systems where this is the
3970 if VM_Target = No_VM then
3971 Store_String_Char (Get_Char_Code ('*'));
3974 String_Val := Strval (Expr_Value_S (Link_Nam));
3975 Store_String_Chars (String_Val);
3977 Make_String_Literal (Sloc (Link_Nam),
3978 Strval => End_String);
3981 Set_Encoded_Interface_Name
3982 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3983 Check_Duplicated_Export_Name (Link_Nam);
3984 end Process_Interface_Name;
3986 -----------------------------------------
3987 -- Process_Interrupt_Or_Attach_Handler --
3988 -----------------------------------------
3990 procedure Process_Interrupt_Or_Attach_Handler is
3991 Arg1_X : constant Node_Id := Expression (Arg1);
3992 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3993 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3996 Set_Is_Interrupt_Handler (Handler_Proc);
3998 -- If the pragma is not associated with a handler procedure
3999 -- within a protected type, then it must be for a nonprotected
4000 -- procedure for the AAMP target, in which case we don't
4001 -- associate a representation item with the procedure's scope.
4003 if Ekind (Proc_Scope) = E_Protected_Type then
4004 if Prag_Id = Pragma_Interrupt_Handler
4006 Prag_Id = Pragma_Attach_Handler
4008 Record_Rep_Item (Proc_Scope, N);
4011 end Process_Interrupt_Or_Attach_Handler;
4013 --------------------------------------------------
4014 -- Process_Restrictions_Or_Restriction_Warnings --
4015 --------------------------------------------------
4017 -- Note: some of the simple identifier cases were handled in par-prag,
4018 -- but it is harmless (and more straightforward) to simply handle all
4019 -- cases here, even if it means we repeat a bit of work in some cases.
4021 procedure Process_Restrictions_Or_Restriction_Warnings
4025 R_Id : Restriction_Id;
4030 procedure Check_Unit_Name (N : Node_Id);
4031 -- Checks unit name parameter for No_Dependence. Returns if it has
4032 -- an appropriate form, otherwise raises pragma argument error.
4034 ---------------------
4035 -- Check_Unit_Name --
4036 ---------------------
4038 procedure Check_Unit_Name (N : Node_Id) is
4040 if Nkind (N) = N_Selected_Component then
4041 Check_Unit_Name (Prefix (N));
4042 Check_Unit_Name (Selector_Name (N));
4044 elsif Nkind (N) = N_Identifier then
4049 ("wrong form for unit name for No_Dependence", N);
4051 end Check_Unit_Name;
4053 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
4056 Check_Ada_83_Warning;
4057 Check_At_Least_N_Arguments (1);
4058 Check_Valid_Configuration_Pragma;
4061 while Present (Arg) loop
4063 Expr := Expression (Arg);
4065 -- Case of no restriction identifier present
4067 if Id = No_Name then
4068 if Nkind (Expr) /= N_Identifier then
4070 ("invalid form for restriction", Arg);
4075 (Process_Restriction_Synonyms (Expr));
4077 if R_Id not in All_Boolean_Restrictions then
4078 Error_Msg_Name_1 := Pname;
4080 ("invalid restriction identifier&", Get_Pragma_Arg (Arg));
4082 -- Check for possible misspelling
4084 for J in Restriction_Id loop
4086 Rnm : constant String := Restriction_Id'Image (J);
4089 Name_Buffer (1 .. Rnm'Length) := Rnm;
4090 Name_Len := Rnm'Length;
4091 Set_Casing (All_Lower_Case);
4093 if Is_Bad_Spelling_Of (Chars (Expr), Name_Enter) then
4095 (Identifier_Casing (Current_Source_File));
4096 Error_Msg_String (1 .. Rnm'Length) :=
4097 Name_Buffer (1 .. Name_Len);
4098 Error_Msg_Strlen := Rnm'Length;
4100 ("\possible misspelling of ""~""",
4101 Get_Pragma_Arg (Arg));
4110 if Implementation_Restriction (R_Id) then
4111 Check_Restriction (No_Implementation_Restrictions, Arg);
4114 -- If this is a warning, then set the warning unless we already
4115 -- have a real restriction active (we never want a warning to
4116 -- override a real restriction).
4119 if not Restriction_Active (R_Id) then
4120 Set_Restriction (R_Id, N);
4121 Restriction_Warnings (R_Id) := True;
4124 -- If real restriction case, then set it and make sure that the
4125 -- restriction warning flag is off, since a real restriction
4126 -- always overrides a warning.
4129 Set_Restriction (R_Id, N);
4130 Restriction_Warnings (R_Id) := False;
4133 -- A very special case that must be processed here: pragma
4134 -- Restrictions (No_Exceptions) turns off all run-time
4135 -- checking. This is a bit dubious in terms of the formal
4136 -- language definition, but it is what is intended by RM
4137 -- H.4(12). Restriction_Warnings never affects generated code
4138 -- so this is done only in the real restriction case.
4140 if R_Id = No_Exceptions and then not Warn then
4141 Scope_Suppress := (others => True);
4144 -- Case of No_Dependence => unit-name. Note that the parser
4145 -- already made the necessary entry in the No_Dependence table.
4147 elsif Id = Name_No_Dependence then
4148 Check_Unit_Name (Expr);
4150 -- All other cases of restriction identifier present
4153 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
4154 Analyze_And_Resolve (Expr, Any_Integer);
4156 if R_Id not in All_Parameter_Restrictions then
4158 ("invalid restriction parameter identifier", Arg);
4160 elsif not Is_OK_Static_Expression (Expr) then
4161 Flag_Non_Static_Expr
4162 ("value must be static expression!", Expr);
4165 elsif not Is_Integer_Type (Etype (Expr))
4166 or else Expr_Value (Expr) < 0
4169 ("value must be non-negative integer", Arg);
4172 -- Restriction pragma is active
4174 Val := Expr_Value (Expr);
4176 if not UI_Is_In_Int_Range (Val) then
4178 ("pragma ignored, value too large?", Arg);
4181 -- Warning case. If the real restriction is active, then we
4182 -- ignore the request, since warning never overrides a real
4183 -- restriction. Otherwise we set the proper warning. Note that
4184 -- this circuit sets the warning again if it is already set,
4185 -- which is what we want, since the constant may have changed.
4188 if not Restriction_Active (R_Id) then
4190 (R_Id, N, Integer (UI_To_Int (Val)));
4191 Restriction_Warnings (R_Id) := True;
4194 -- Real restriction case, set restriction and make sure warning
4195 -- flag is off since real restriction always overrides warning.
4198 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
4199 Restriction_Warnings (R_Id) := False;
4205 end Process_Restrictions_Or_Restriction_Warnings;
4207 ---------------------------------
4208 -- Process_Suppress_Unsuppress --
4209 ---------------------------------
4211 -- Note: this procedure makes entries in the check suppress data
4212 -- structures managed by Sem. See spec of package Sem for full
4213 -- details on how we handle recording of check suppression.
4215 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
4220 In_Package_Spec : constant Boolean :=
4221 (Ekind (Current_Scope) = E_Package
4223 Ekind (Current_Scope) = E_Generic_Package)
4224 and then not In_Package_Body (Current_Scope);
4226 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
4227 -- Used to suppress a single check on the given entity
4229 --------------------------------
4230 -- Suppress_Unsuppress_Echeck --
4231 --------------------------------
4233 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
4235 Set_Checks_May_Be_Suppressed (E);
4237 if In_Package_Spec then
4238 Push_Global_Suppress_Stack_Entry
4241 Suppress => Suppress_Case);
4244 Push_Local_Suppress_Stack_Entry
4247 Suppress => Suppress_Case);
4250 -- If this is a first subtype, and the base type is distinct,
4251 -- then also set the suppress flags on the base type.
4253 if Is_First_Subtype (E)
4254 and then Etype (E) /= E
4256 Suppress_Unsuppress_Echeck (Etype (E), C);
4258 end Suppress_Unsuppress_Echeck;
4260 -- Start of processing for Process_Suppress_Unsuppress
4263 -- Suppress/Unsuppress can appear as a configuration pragma,
4264 -- or in a declarative part or a package spec (RM 11.5(5))
4266 if not Is_Configuration_Pragma then
4267 Check_Is_In_Decl_Part_Or_Package_Spec;
4270 Check_At_Least_N_Arguments (1);
4271 Check_At_Most_N_Arguments (2);
4272 Check_No_Identifier (Arg1);
4273 Check_Arg_Is_Identifier (Arg1);
4275 C := Get_Check_Id (Chars (Expression (Arg1)));
4277 if C = No_Check_Id then
4279 ("argument of pragma% is not valid check name", Arg1);
4282 if not Suppress_Case
4283 and then (C = All_Checks or else C = Overflow_Check)
4285 Opt.Overflow_Checks_Unsuppressed := True;
4288 if Arg_Count = 1 then
4290 -- Make an entry in the local scope suppress table. This is the
4291 -- table that directly shows the current value of the scope
4292 -- suppress check for any check id value.
4294 if C = All_Checks then
4296 -- For All_Checks, we set all specific predefined checks with
4297 -- the exception of Elaboration_Check, which is handled
4298 -- specially because of not wanting All_Checks to have the
4299 -- effect of deactivating static elaboration order processing.
4301 for J in Scope_Suppress'Range loop
4302 if J /= Elaboration_Check then
4303 Scope_Suppress (J) := Suppress_Case;
4307 -- If not All_Checks, and predefined check, then set appropriate
4308 -- scope entry. Note that we will set Elaboration_Check if this
4309 -- is explicitly specified.
4311 elsif C in Predefined_Check_Id then
4312 Scope_Suppress (C) := Suppress_Case;
4315 -- Also make an entry in the Local_Entity_Suppress table
4317 Push_Local_Suppress_Stack_Entry
4320 Suppress => Suppress_Case);
4322 -- Case of two arguments present, where the check is suppressed for
4323 -- a specified entity (given as the second argument of the pragma)
4326 Check_Optional_Identifier (Arg2, Name_On);
4327 E_Id := Expression (Arg2);
4330 if not Is_Entity_Name (E_Id) then
4332 ("second argument of pragma% must be entity name", Arg2);
4341 -- Enforce RM 11.5(7) which requires that for a pragma that
4342 -- appears within a package spec, the named entity must be
4343 -- within the package spec. We allow the package name itself
4344 -- to be mentioned since that makes sense, although it is not
4345 -- strictly allowed by 11.5(7).
4348 and then E /= Current_Scope
4349 and then Scope (E) /= Current_Scope
4352 ("entity in pragma% is not in package spec (RM 11.5(7))",
4356 -- Loop through homonyms. As noted below, in the case of a package
4357 -- spec, only homonyms within the package spec are considered.
4360 Suppress_Unsuppress_Echeck (E, C);
4362 if Is_Generic_Instance (E)
4363 and then Is_Subprogram (E)
4364 and then Present (Alias (E))
4366 Suppress_Unsuppress_Echeck (Alias (E), C);
4369 -- Move to next homonym
4374 -- If we are within a package specification, the
4375 -- pragma only applies to homonyms in the same scope.
4377 exit when In_Package_Spec
4378 and then Scope (E) /= Current_Scope;
4381 end Process_Suppress_Unsuppress;
4387 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
4389 if Is_Imported (E) then
4391 ("cannot export entity& that was previously imported", Arg);
4393 elsif Present (Address_Clause (E)) then
4395 ("cannot export entity& that has an address clause", Arg);
4398 Set_Is_Exported (E);
4400 -- Generate a reference for entity explicitly, because the
4401 -- identifier may be overloaded and name resolution will not
4404 Generate_Reference (E, Arg);
4406 -- Deal with exporting non-library level entity
4408 if not Is_Library_Level_Entity (E) then
4410 -- Not allowed at all for subprograms
4412 if Is_Subprogram (E) then
4413 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
4415 -- Otherwise set public and statically allocated
4419 Set_Is_Statically_Allocated (E);
4421 -- Warn if the corresponding W flag is set and the pragma
4422 -- comes from source. The latter may not be true e.g. on
4423 -- VMS where we expand export pragmas for exception codes
4424 -- associated with imported or exported exceptions. We do
4425 -- not want to generate a warning for something that the
4426 -- user did not write.
4428 if Warn_On_Export_Import
4429 and then Comes_From_Source (Arg)
4432 ("?& has been made static as a result of Export", Arg, E);
4434 ("\this usage is non-standard and non-portable", Arg);
4439 if Warn_On_Export_Import and then Is_Type (E) then
4441 ("exporting a type has no effect?", Arg, E);
4444 if Warn_On_Export_Import and Inside_A_Generic then
4446 ("all instances of& will have the same external name?", Arg, E);
4450 ----------------------------------------------
4451 -- Set_Extended_Import_Export_External_Name --
4452 ----------------------------------------------
4454 procedure Set_Extended_Import_Export_External_Name
4455 (Internal_Ent : Entity_Id;
4456 Arg_External : Node_Id)
4458 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
4462 if No (Arg_External) then
4466 Check_Arg_Is_External_Name (Arg_External);
4468 if Nkind (Arg_External) = N_String_Literal then
4469 if String_Length (Strval (Arg_External)) = 0 then
4472 New_Name := Adjust_External_Name_Case (Arg_External);
4475 elsif Nkind (Arg_External) = N_Identifier then
4476 New_Name := Get_Default_External_Name (Arg_External);
4478 -- Check_Arg_Is_External_Name should let through only
4479 -- identifiers and string literals or static string
4480 -- expressions (which are folded to string literals).
4483 raise Program_Error;
4486 -- If we already have an external name set (by a prior normal
4487 -- Import or Export pragma), then the external names must match
4489 if Present (Interface_Name (Internal_Ent)) then
4490 Check_Matching_Internal_Names : declare
4491 S1 : constant String_Id := Strval (Old_Name);
4492 S2 : constant String_Id := Strval (New_Name);
4495 -- Called if names do not match
4501 procedure Mismatch is
4503 Error_Msg_Sloc := Sloc (Old_Name);
4505 ("external name does not match that given #",
4509 -- Start of processing for Check_Matching_Internal_Names
4512 if String_Length (S1) /= String_Length (S2) then
4516 for J in 1 .. String_Length (S1) loop
4517 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
4522 end Check_Matching_Internal_Names;
4524 -- Otherwise set the given name
4527 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
4528 Check_Duplicated_Export_Name (New_Name);
4530 end Set_Extended_Import_Export_External_Name;
4536 procedure Set_Imported (E : Entity_Id) is
4538 -- Error message if already imported or exported
4540 if Is_Exported (E) or else Is_Imported (E) then
4541 if Is_Exported (E) then
4542 Error_Msg_NE ("entity& was previously exported", N, E);
4544 Error_Msg_NE ("entity& was previously imported", N, E);
4547 Error_Msg_Name_1 := Pname;
4549 ("\(pragma% applies to all previous entities)", N);
4551 Error_Msg_Sloc := Sloc (E);
4552 Error_Msg_NE ("\import not allowed for& declared#", N, E);
4554 -- Here if not previously imported or exported, OK to import
4557 Set_Is_Imported (E);
4559 -- If the entity is an object that is not at the library
4560 -- level, then it is statically allocated. We do not worry
4561 -- about objects with address clauses in this context since
4562 -- they are not really imported in the linker sense.
4565 and then not Is_Library_Level_Entity (E)
4566 and then No (Address_Clause (E))
4568 Set_Is_Statically_Allocated (E);
4573 -------------------------
4574 -- Set_Mechanism_Value --
4575 -------------------------
4577 -- Note: the mechanism name has not been analyzed (and cannot indeed
4578 -- be analyzed, since it is semantic nonsense), so we get it in the
4579 -- exact form created by the parser.
4581 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
4585 procedure Bad_Class;
4586 -- Signal bad descriptor class name
4588 procedure Bad_Mechanism;
4589 -- Signal bad mechanism name
4595 procedure Bad_Class is
4597 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
4600 -------------------------
4601 -- Bad_Mechanism_Value --
4602 -------------------------
4604 procedure Bad_Mechanism is
4606 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
4609 -- Start of processing for Set_Mechanism_Value
4612 if Mechanism (Ent) /= Default_Mechanism then
4614 ("mechanism for & has already been set", Mech_Name, Ent);
4617 -- MECHANISM_NAME ::= value | reference | descriptor
4619 if Nkind (Mech_Name) = N_Identifier then
4620 if Chars (Mech_Name) = Name_Value then
4621 Set_Mechanism (Ent, By_Copy);
4624 elsif Chars (Mech_Name) = Name_Reference then
4625 Set_Mechanism (Ent, By_Reference);
4628 elsif Chars (Mech_Name) = Name_Descriptor then
4629 Check_VMS (Mech_Name);
4630 Set_Mechanism (Ent, By_Descriptor);
4633 elsif Chars (Mech_Name) = Name_Copy then
4635 ("bad mechanism name, Value assumed", Mech_Name);
4641 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
4642 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4644 -- Note: this form is parsed as an indexed component
4646 elsif Nkind (Mech_Name) = N_Indexed_Component then
4647 Class := First (Expressions (Mech_Name));
4649 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4650 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
4651 or else Present (Next (Class))
4656 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
4657 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4659 -- Note: this form is parsed as a function call
4661 elsif Nkind (Mech_Name) = N_Function_Call then
4663 Param := First (Parameter_Associations (Mech_Name));
4665 if Nkind (Name (Mech_Name)) /= N_Identifier
4666 or else Chars (Name (Mech_Name)) /= Name_Descriptor
4667 or else Present (Next (Param))
4668 or else No (Selector_Name (Param))
4669 or else Chars (Selector_Name (Param)) /= Name_Class
4673 Class := Explicit_Actual_Parameter (Param);
4680 -- Fall through here with Class set to descriptor class name
4682 Check_VMS (Mech_Name);
4684 if Nkind (Class) /= N_Identifier then
4687 elsif Chars (Class) = Name_UBS then
4688 Set_Mechanism (Ent, By_Descriptor_UBS);
4690 elsif Chars (Class) = Name_UBSB then
4691 Set_Mechanism (Ent, By_Descriptor_UBSB);
4693 elsif Chars (Class) = Name_UBA then
4694 Set_Mechanism (Ent, By_Descriptor_UBA);
4696 elsif Chars (Class) = Name_S then
4697 Set_Mechanism (Ent, By_Descriptor_S);
4699 elsif Chars (Class) = Name_SB then
4700 Set_Mechanism (Ent, By_Descriptor_SB);
4702 elsif Chars (Class) = Name_A then
4703 Set_Mechanism (Ent, By_Descriptor_A);
4705 elsif Chars (Class) = Name_NCA then
4706 Set_Mechanism (Ent, By_Descriptor_NCA);
4711 end Set_Mechanism_Value;
4713 ---------------------------
4714 -- Set_Ravenscar_Profile --
4715 ---------------------------
4717 -- The tasks to be done here are
4719 -- Set required policies
4721 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4722 -- pragma Locking_Policy (Ceiling_Locking)
4724 -- Set Detect_Blocking mode
4726 -- Set required restrictions (see System.Rident for detailed list)
4728 procedure Set_Ravenscar_Profile (N : Node_Id) is
4730 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4732 if Task_Dispatching_Policy /= ' '
4733 and then Task_Dispatching_Policy /= 'F'
4735 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
4736 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4738 -- Set the FIFO_Within_Priorities policy, but always preserve
4739 -- System_Location since we like the error message with the run time
4743 Task_Dispatching_Policy := 'F';
4745 if Task_Dispatching_Policy_Sloc /= System_Location then
4746 Task_Dispatching_Policy_Sloc := Loc;
4750 -- pragma Locking_Policy (Ceiling_Locking)
4752 if Locking_Policy /= ' '
4753 and then Locking_Policy /= 'C'
4755 Error_Msg_Sloc := Locking_Policy_Sloc;
4756 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4758 -- Set the Ceiling_Locking policy, but preserve System_Location since
4759 -- we like the error message with the run time name.
4762 Locking_Policy := 'C';
4764 if Locking_Policy_Sloc /= System_Location then
4765 Locking_Policy_Sloc := Loc;
4769 -- pragma Detect_Blocking
4771 Detect_Blocking := True;
4773 -- Set the corresponding restrictions
4775 Set_Profile_Restrictions
4776 (Ravenscar, N, Warn => Treat_Restrictions_As_Warnings);
4777 end Set_Ravenscar_Profile;
4779 -- Start of processing for Analyze_Pragma
4782 -- Deal with unrecognized pragma
4784 if not Is_Pragma_Name (Pname) then
4785 if Warn_On_Unrecognized_Pragma then
4786 Error_Msg_Name_1 := Pname;
4787 Error_Msg_N ("?unrecognized pragma%!", Pragma_Identifier (N));
4789 for PN in First_Pragma_Name .. Last_Pragma_Name loop
4790 if Is_Bad_Spelling_Of (Pname, PN) then
4791 Error_Msg_Name_1 := PN;
4793 ("\?possible misspelling of %!", Pragma_Identifier (N));
4802 -- Here to start processing for recognized pragma
4804 Prag_Id := Get_Pragma_Id (Pname);
4813 if Present (Pragma_Argument_Associations (N)) then
4814 Arg1 := First (Pragma_Argument_Associations (N));
4816 if Present (Arg1) then
4817 Arg2 := Next (Arg1);
4819 if Present (Arg2) then
4820 Arg3 := Next (Arg2);
4822 if Present (Arg3) then
4823 Arg4 := Next (Arg3);
4829 -- Count number of arguments
4836 while Present (Arg_Node) loop
4837 Arg_Count := Arg_Count + 1;
4842 -- An enumeration type defines the pragmas that are supported by the
4843 -- implementation. Get_Pragma_Id (in package Prag) transforms a name
4844 -- into the corresponding enumeration value for the following case.
4852 -- pragma Abort_Defer;
4854 when Pragma_Abort_Defer =>
4856 Check_Arg_Count (0);
4858 -- The only required semantic processing is to check the
4859 -- placement. This pragma must appear at the start of the
4860 -- statement sequence of a handled sequence of statements.
4862 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
4863 or else N /= First (Statements (Parent (N)))
4874 -- Note: this pragma also has some specific processing in Par.Prag
4875 -- because we want to set the Ada version mode during parsing.
4877 when Pragma_Ada_83 =>
4879 Check_Arg_Count (0);
4881 -- We really should check unconditionally for proper configuration
4882 -- pragma placement, since we really don't want mixed Ada modes
4883 -- within a single unit, and the GNAT reference manual has always
4884 -- said this was a configuration pragma, but we did not check and
4885 -- are hesitant to add the check now.
4887 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
4888 -- or Ada 95, so we must check if we are in Ada 2005 mode.
4890 if Ada_Version >= Ada_05 then
4891 Check_Valid_Configuration_Pragma;
4894 -- Now set Ada 83 mode
4896 Ada_Version := Ada_83;
4897 Ada_Version_Explicit := Ada_Version;
4905 -- Note: this pragma also has some specific processing in Par.Prag
4906 -- because we want to set the Ada 83 version mode during parsing.
4908 when Pragma_Ada_95 =>
4910 Check_Arg_Count (0);
4912 -- We really should check unconditionally for proper configuration
4913 -- pragma placement, since we really don't want mixed Ada modes
4914 -- within a single unit, and the GNAT reference manual has always
4915 -- said this was a configuration pragma, but we did not check and
4916 -- are hesitant to add the check now.
4918 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
4919 -- or Ada 95, so we must check if we are in Ada 2005 mode.
4921 if Ada_Version >= Ada_05 then
4922 Check_Valid_Configuration_Pragma;
4925 -- Now set Ada 95 mode
4927 Ada_Version := Ada_95;
4928 Ada_Version_Explicit := Ada_Version;
4930 ---------------------
4931 -- Ada_05/Ada_2005 --
4932 ---------------------
4935 -- pragma Ada_05 (LOCAL_NAME);
4938 -- pragma Ada_2005 (LOCAL_NAME):
4940 -- Note: these pragma also have some specific processing in Par.Prag
4941 -- because we want to set the Ada 2005 version mode during parsing.
4943 when Pragma_Ada_05 | Pragma_Ada_2005 => declare
4949 if Arg_Count = 1 then
4950 Check_Arg_Is_Local_Name (Arg1);
4951 E_Id := Expression (Arg1);
4953 if Etype (E_Id) = Any_Type then
4957 Set_Is_Ada_2005_Only (Entity (E_Id));
4960 Check_Arg_Count (0);
4962 -- For Ada_2005 we unconditionally enforce the documented
4963 -- configuration pragma placement, since we do not want to
4964 -- tolerate mixed modes in a unit involving Ada 2005. That
4965 -- would cause real difficulties for those cases where there
4966 -- are incompatibilities between Ada 95 and Ada 2005.
4968 Check_Valid_Configuration_Pragma;
4970 -- Now set Ada 2005 mode
4972 Ada_Version := Ada_05;
4973 Ada_Version_Explicit := Ada_05;
4977 ----------------------
4978 -- All_Calls_Remote --
4979 ----------------------
4981 -- pragma All_Calls_Remote [(library_package_NAME)];
4983 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
4984 Lib_Entity : Entity_Id;
4987 Check_Ada_83_Warning;
4988 Check_Valid_Library_Unit_Pragma;
4990 if Nkind (N) = N_Null_Statement then
4994 Lib_Entity := Find_Lib_Unit_Name;
4996 -- This pragma should only apply to a RCI unit (RM E.2.3(23))
4998 if Present (Lib_Entity)
4999 and then not Debug_Flag_U
5001 if not Is_Remote_Call_Interface (Lib_Entity) then
5002 Error_Pragma ("pragma% only apply to rci unit");
5004 -- Set flag for entity of the library unit
5007 Set_Has_All_Calls_Remote (Lib_Entity);
5011 end All_Calls_Remote;
5017 -- pragma Annotate (IDENTIFIER {, ARG});
5018 -- ARG ::= NAME | EXPRESSION
5020 when Pragma_Annotate => Annotate : begin
5022 Check_At_Least_N_Arguments (1);
5023 Check_Arg_Is_Identifier (Arg1);
5031 while Present (Arg) loop
5032 Exp := Expression (Arg);
5035 if Is_Entity_Name (Exp) then
5038 elsif Nkind (Exp) = N_String_Literal then
5039 Resolve (Exp, Standard_String);
5041 elsif Is_Overloaded (Exp) then
5042 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
5057 -- pragma Assert ([Check =>] Boolean_EXPRESSION
5058 -- [, [Message =>] Static_String_EXPRESSION]);
5060 when Pragma_Assert => Assert : declare
5066 Check_At_Least_N_Arguments (1);
5067 Check_At_Most_N_Arguments (2);
5068 Check_Arg_Order ((Name_Check, Name_Message));
5069 Check_Optional_Identifier (Arg1, Name_Check);
5071 -- We treat pragma Assert as equivalent to:
5073 -- pragma Check (Assertion, condition [, msg]);
5075 -- So rewrite pragma in this manner, and analyze the result
5077 Expr := Get_Pragma_Arg (Arg1);
5079 Make_Pragma_Argument_Association (Loc,
5081 Make_Identifier (Loc,
5082 Chars => Name_Assertion)),
5084 Make_Pragma_Argument_Association (Sloc (Expr),
5085 Expression => Expr));
5087 if Arg_Count > 1 then
5088 Check_Optional_Identifier (Arg2, Name_Message);
5089 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
5090 Append_To (Newa, Relocate_Node (Arg2));
5095 Chars => Name_Check,
5096 Pragma_Argument_Associations => Newa));
5100 ----------------------
5101 -- Assertion_Policy --
5102 ----------------------
5104 -- pragma Assertion_Policy (Check | Ignore)
5106 when Pragma_Assertion_Policy => Assertion_Policy : declare
5111 Check_Valid_Configuration_Pragma;
5112 Check_Arg_Count (1);
5113 Check_No_Identifiers;
5114 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
5116 -- We treat pragma Assertion_Policy as equivalent to:
5118 -- pragma Check_Policy (Assertion, policy)
5120 -- So rewrite the pragma in that manner and link on to the chain
5121 -- of Check_Policy pragmas, marking the pragma as analyzed.
5123 Policy := Get_Pragma_Arg (Arg1);
5127 Chars => Name_Check_Policy,
5129 Pragma_Argument_Associations => New_List (
5130 Make_Pragma_Argument_Association (Loc,
5132 Make_Identifier (Loc,
5133 Chars => Name_Assertion)),
5135 Make_Pragma_Argument_Association (Loc,
5137 Make_Identifier (Sloc (Policy),
5138 Chars => Chars (Policy))))));
5141 Set_Next_Pragma (N, Opt.Check_Policy_List);
5142 Opt.Check_Policy_List := N;
5143 end Assertion_Policy;
5149 -- pragma AST_Entry (entry_IDENTIFIER);
5151 when Pragma_AST_Entry => AST_Entry : declare
5157 Check_Arg_Count (1);
5158 Check_No_Identifiers;
5159 Check_Arg_Is_Local_Name (Arg1);
5160 Ent := Entity (Expression (Arg1));
5162 -- Note: the implementation of the AST_Entry pragma could handle
5163 -- the entry family case fine, but for now we are consistent with
5164 -- the DEC rules, and do not allow the pragma, which of course
5165 -- has the effect of also forbidding the attribute.
5167 if Ekind (Ent) /= E_Entry then
5169 ("pragma% argument must be simple entry name", Arg1);
5171 elsif Is_AST_Entry (Ent) then
5173 ("duplicate % pragma for entry", Arg1);
5175 elsif Has_Homonym (Ent) then
5177 ("pragma% argument cannot specify overloaded entry", Arg1);
5181 FF : constant Entity_Id := First_Formal (Ent);
5184 if Present (FF) then
5185 if Present (Next_Formal (FF)) then
5187 ("entry for pragma% can have only one argument",
5190 elsif Parameter_Mode (FF) /= E_In_Parameter then
5192 ("entry parameter for pragma% must have mode IN",
5198 Set_Is_AST_Entry (Ent);
5206 -- pragma Asynchronous (LOCAL_NAME);
5208 when Pragma_Asynchronous => Asynchronous : declare
5216 procedure Process_Async_Pragma;
5217 -- Common processing for procedure and access-to-procedure case
5219 --------------------------
5220 -- Process_Async_Pragma --
5221 --------------------------
5223 procedure Process_Async_Pragma is
5226 Set_Is_Asynchronous (Nm);
5230 -- The formals should be of mode IN (RM E.4.1(6))
5233 while Present (S) loop
5234 Formal := Defining_Identifier (S);
5236 if Nkind (Formal) = N_Defining_Identifier
5237 and then Ekind (Formal) /= E_In_Parameter
5240 ("pragma% procedure can only have IN parameter",
5247 Set_Is_Asynchronous (Nm);
5248 end Process_Async_Pragma;
5250 -- Start of processing for pragma Asynchronous
5253 Check_Ada_83_Warning;
5254 Check_No_Identifiers;
5255 Check_Arg_Count (1);
5256 Check_Arg_Is_Local_Name (Arg1);
5258 if Debug_Flag_U then
5262 C_Ent := Cunit_Entity (Current_Sem_Unit);
5263 Analyze (Expression (Arg1));
5264 Nm := Entity (Expression (Arg1));
5266 if not Is_Remote_Call_Interface (C_Ent)
5267 and then not Is_Remote_Types (C_Ent)
5269 -- This pragma should only appear in an RCI or Remote Types
5270 -- unit (RM E.4.1(4))
5273 ("pragma% not in Remote_Call_Interface or " &
5274 "Remote_Types unit");
5277 if Ekind (Nm) = E_Procedure
5278 and then Nkind (Parent (Nm)) = N_Procedure_Specification
5280 if not Is_Remote_Call_Interface (Nm) then
5282 ("pragma% cannot be applied on non-remote procedure",
5286 L := Parameter_Specifications (Parent (Nm));
5287 Process_Async_Pragma;
5290 elsif Ekind (Nm) = E_Function then
5292 ("pragma% cannot be applied to function", Arg1);
5294 elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
5296 if Is_Record_Type (Nm) then
5297 -- A record type that is the Equivalent_Type for
5298 -- a remote access-to-subprogram type.
5300 N := Declaration_Node (Corresponding_Remote_Type (Nm));
5303 -- A non-expanded RAS type (case where distribution is
5306 N := Declaration_Node (Nm);
5309 if Nkind (N) = N_Full_Type_Declaration
5310 and then Nkind (Type_Definition (N)) =
5311 N_Access_Procedure_Definition
5313 L := Parameter_Specifications (Type_Definition (N));
5314 Process_Async_Pragma;
5316 if Is_Asynchronous (Nm)
5317 and then Expander_Active
5318 and then Get_PCS_Name /= Name_No_DSA
5320 RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
5325 ("pragma% cannot reference access-to-function type",
5329 -- Only other possibility is Access-to-class-wide type
5331 elsif Is_Access_Type (Nm)
5332 and then Is_Class_Wide_Type (Designated_Type (Nm))
5334 Check_First_Subtype (Arg1);
5335 Set_Is_Asynchronous (Nm);
5336 if Expander_Active then
5337 RACW_Type_Is_Asynchronous (Nm);
5341 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
5349 -- pragma Atomic (LOCAL_NAME);
5351 when Pragma_Atomic =>
5352 Process_Atomic_Shared_Volatile;
5354 -----------------------
5355 -- Atomic_Components --
5356 -----------------------
5358 -- pragma Atomic_Components (array_LOCAL_NAME);
5360 -- This processing is shared by Volatile_Components
5362 when Pragma_Atomic_Components |
5363 Pragma_Volatile_Components =>
5365 Atomic_Components : declare
5372 Check_Ada_83_Warning;
5373 Check_No_Identifiers;
5374 Check_Arg_Count (1);
5375 Check_Arg_Is_Local_Name (Arg1);
5376 E_Id := Expression (Arg1);
5378 if Etype (E_Id) = Any_Type then
5384 if Rep_Item_Too_Early (E, N)
5386 Rep_Item_Too_Late (E, N)
5391 D := Declaration_Node (E);
5394 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
5396 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
5397 and then Nkind (D) = N_Object_Declaration
5398 and then Nkind (Object_Definition (D)) =
5399 N_Constrained_Array_Definition)
5401 -- The flag is set on the object, or on the base type
5403 if Nkind (D) /= N_Object_Declaration then
5407 Set_Has_Volatile_Components (E);
5409 if Prag_Id = Pragma_Atomic_Components then
5410 Set_Has_Atomic_Components (E);
5412 if Is_Packed (E) then
5413 Set_Is_Packed (E, False);
5416 ("?Pack canceled, cannot pack atomic components",
5422 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
5424 end Atomic_Components;
5426 --------------------
5427 -- Attach_Handler --
5428 --------------------
5430 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
5432 when Pragma_Attach_Handler =>
5433 Check_Ada_83_Warning;
5434 Check_No_Identifiers;
5435 Check_Arg_Count (2);
5437 if No_Run_Time_Mode then
5438 Error_Msg_CRT ("Attach_Handler pragma", N);
5440 Check_Interrupt_Or_Attach_Handler;
5442 -- The expression that designates the attribute may
5443 -- depend on a discriminant, and is therefore a per-
5444 -- object expression, to be expanded in the init proc.
5445 -- If expansion is enabled, perform semantic checks
5448 if Expander_Active then
5450 Temp : constant Node_Id :=
5451 New_Copy_Tree (Expression (Arg2));
5453 Set_Parent (Temp, N);
5454 Preanalyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
5458 Analyze (Expression (Arg2));
5459 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
5462 Process_Interrupt_Or_Attach_Handler;
5465 --------------------
5466 -- C_Pass_By_Copy --
5467 --------------------
5469 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
5471 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
5477 Check_Valid_Configuration_Pragma;
5478 Check_Arg_Count (1);
5479 Check_Optional_Identifier (Arg1, "max_size");
5481 Arg := Expression (Arg1);
5482 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
5484 Val := Expr_Value (Arg);
5488 ("maximum size for pragma% must be positive", Arg1);
5490 elsif UI_Is_In_Int_Range (Val) then
5491 Default_C_Record_Mechanism := UI_To_Int (Val);
5493 -- If a giant value is given, Int'Last will do well enough.
5494 -- If sometime someone complains that a record larger than
5495 -- two gigabytes is not copied, we will worry about it then!
5498 Default_C_Record_Mechanism := Mechanism_Type'Last;
5506 -- pragma Check ([Name =>] Identifier,
5507 -- [Check =>] Boolean_Expression
5508 -- [,[Message =>] String_Expression]);
5510 when Pragma_Check => Check : declare
5515 -- Set True if category of assertions referenced by Name enabled
5519 Check_At_Least_N_Arguments (2);
5520 Check_At_Most_N_Arguments (3);
5521 Check_Optional_Identifier (Arg1, Name_Name);
5522 Check_Optional_Identifier (Arg2, Name_Check);
5524 if Arg_Count = 3 then
5525 Check_Optional_Identifier (Arg3, Name_Message);
5526 Analyze_And_Resolve (Get_Pragma_Arg (Arg3), Standard_String);
5529 Check_Arg_Is_Identifier (Arg1);
5530 Check_On := Check_Enabled (Chars (Get_Pragma_Arg (Arg1)));
5532 -- If expansion is active and the check is not enabled then we
5533 -- rewrite the Check as:
5535 -- if False and then condition then
5539 -- The reason we do this rewriting during semantic analysis rather
5540 -- than as part of normal expansion is that we cannot analyze and
5541 -- expand the code for the boolean expression directly, or it may
5542 -- cause insertion of actions that would escape the attempt to
5543 -- suppress the check code.
5545 -- Note that the Sloc for the if statement corresponds to the
5546 -- argument condition, not the pragma itself. The reason for this
5547 -- is that we may generate a warning if the condition is False at
5548 -- compile time, and we do not want to delete this warning when we
5549 -- delete the if statement.
5551 Expr := Expression (Arg2);
5553 if Expander_Active and then not Check_On then
5554 Eloc := Sloc (Expr);
5557 Make_If_Statement (Eloc,
5559 Make_And_Then (Eloc,
5560 Left_Opnd => New_Occurrence_Of (Standard_False, Eloc),
5561 Right_Opnd => Expr),
5562 Then_Statements => New_List (
5563 Make_Null_Statement (Eloc))));
5570 Analyze_And_Resolve (Expr, Any_Boolean);
5573 -- If assertion is of the form (X'First = literal), where X is
5574 -- a formal, then set Low_Bound_Known flag on this formal.
5576 if Nkind (Expr) = N_Op_Eq then
5578 Right : constant Node_Id := Right_Opnd (Expr);
5579 Left : constant Node_Id := Left_Opnd (Expr);
5581 if Nkind (Left) = N_Attribute_Reference
5582 and then Attribute_Name (Left) = Name_First
5583 and then Is_Entity_Name (Prefix (Left))
5584 and then Is_Formal (Entity (Prefix (Left)))
5585 and then Nkind (Right) = N_Integer_Literal
5587 Set_Low_Bound_Known (Entity (Prefix (Left)));
5597 -- pragma Check_Name (check_IDENTIFIER);
5599 when Pragma_Check_Name =>
5600 Check_No_Identifiers;
5602 Check_Valid_Configuration_Pragma;
5603 Check_Arg_Count (1);
5604 Check_Arg_Is_Identifier (Arg1);
5607 Nam : constant Name_Id := Chars (Expression (Arg1));
5610 for J in Check_Names.First .. Check_Names.Last loop
5611 if Check_Names.Table (J) = Nam then
5616 Check_Names.Append (Nam);
5623 -- pragma Check_Policy ([Name =>] IDENTIFIER,
5624 -- POLICY_IDENTIFIER;
5626 -- POLICY_IDENTIFIER ::= ON | OFF | CHECK | IGNORE
5628 -- Note: this is a configuration pragma, but it is allowed to
5629 -- appear anywhere else.
5631 when Pragma_Check_Policy =>
5633 Check_Arg_Count (2);
5634 Check_No_Identifier (Arg2);
5635 Check_Optional_Identifier (Arg1, Name_Name);
5637 (Arg2, Name_On, Name_Off, Name_Check, Name_Ignore);
5639 -- A Check_Policy pragma can appear either as a configuration
5640 -- pragma, or in a declarative part or a package spec (see RM
5641 -- 11.5(5) for rules for Suppress/Unsuppress which are also
5642 -- followed for Check_Policy).
5644 if not Is_Configuration_Pragma then
5645 Check_Is_In_Decl_Part_Or_Package_Spec;
5648 Set_Next_Pragma (N, Opt.Check_Policy_List);
5649 Opt.Check_Policy_List := N;
5651 ---------------------
5652 -- CIL_Constructor --
5653 ---------------------
5655 -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME);
5657 -- Processing for this pragma is shared with Java_Constructor
5663 -- pragma Comment (static_string_EXPRESSION)
5665 -- Processing for pragma Comment shares the circuitry for
5666 -- pragma Ident. The only differences are that Ident enforces
5667 -- a limit of 31 characters on its argument, and also enforces
5668 -- limitations on placement for DEC compatibility. Pragma
5669 -- Comment shares neither of these restrictions.
5675 -- pragma Common_Object (
5676 -- [Internal =>] LOCAL_NAME
5677 -- [, [External =>] EXTERNAL_SYMBOL]
5678 -- [, [Size =>] EXTERNAL_SYMBOL]);
5680 -- Processing for this pragma is shared with Psect_Object
5682 ------------------------
5683 -- Compile_Time_Error --
5684 ------------------------
5686 -- pragma Compile_Time_Error
5687 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5689 when Pragma_Compile_Time_Error =>
5690 Process_Compile_Time_Warning_Or_Error;
5692 --------------------------
5693 -- Compile_Time_Warning --
5694 --------------------------
5696 -- pragma Compile_Time_Warning
5697 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5699 when Pragma_Compile_Time_Warning =>
5700 Process_Compile_Time_Warning_Or_Error;
5706 when Pragma_Compiler_Unit =>
5708 Check_Arg_Count (0);
5709 Set_Is_Compiler_Unit (Get_Source_Unit (N));
5711 -----------------------------
5712 -- Complete_Representation --
5713 -----------------------------
5715 -- pragma Complete_Representation;
5717 when Pragma_Complete_Representation =>
5719 Check_Arg_Count (0);
5721 if Nkind (Parent (N)) /= N_Record_Representation_Clause then
5723 ("pragma & must appear within record representation clause");
5726 ----------------------------
5727 -- Complex_Representation --
5728 ----------------------------
5730 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
5732 when Pragma_Complex_Representation => Complex_Representation : declare
5739 Check_Arg_Count (1);
5740 Check_Optional_Identifier (Arg1, Name_Entity);
5741 Check_Arg_Is_Local_Name (Arg1);
5742 E_Id := Expression (Arg1);
5744 if Etype (E_Id) = Any_Type then
5750 if not Is_Record_Type (E) then
5752 ("argument for pragma% must be record type", Arg1);
5755 Ent := First_Entity (E);
5758 or else No (Next_Entity (Ent))
5759 or else Present (Next_Entity (Next_Entity (Ent)))
5760 or else not Is_Floating_Point_Type (Etype (Ent))
5761 or else Etype (Ent) /= Etype (Next_Entity (Ent))
5764 ("record for pragma% must have two fields of the same "
5765 & "floating-point type", Arg1);
5768 Set_Has_Complex_Representation (Base_Type (E));
5770 -- We need to treat the type has having a non-standard
5771 -- representation, for back-end purposes, even though in
5772 -- general a complex will have the default representation
5773 -- of a record with two real components.
5775 Set_Has_Non_Standard_Rep (Base_Type (E));
5777 end Complex_Representation;
5779 -------------------------
5780 -- Component_Alignment --
5781 -------------------------
5783 -- pragma Component_Alignment (
5784 -- [Form =>] ALIGNMENT_CHOICE
5785 -- [, [Name =>] type_LOCAL_NAME]);
5787 -- ALIGNMENT_CHOICE ::=
5789 -- | Component_Size_4
5793 when Pragma_Component_Alignment => Component_AlignmentP : declare
5794 Args : Args_List (1 .. 2);
5795 Names : constant Name_List (1 .. 2) := (
5799 Form : Node_Id renames Args (1);
5800 Name : Node_Id renames Args (2);
5802 Atype : Component_Alignment_Kind;
5807 Gather_Associations (Names, Args);
5810 Error_Pragma ("missing Form argument for pragma%");
5813 Check_Arg_Is_Identifier (Form);
5815 -- Get proper alignment, note that Default = Component_Size
5816 -- on all machines we have so far, and we want to set this
5817 -- value rather than the default value to indicate that it
5818 -- has been explicitly set (and thus will not get overridden
5819 -- by the default component alignment for the current scope)
5821 if Chars (Form) = Name_Component_Size then
5822 Atype := Calign_Component_Size;
5824 elsif Chars (Form) = Name_Component_Size_4 then
5825 Atype := Calign_Component_Size_4;
5827 elsif Chars (Form) = Name_Default then
5828 Atype := Calign_Component_Size;
5830 elsif Chars (Form) = Name_Storage_Unit then
5831 Atype := Calign_Storage_Unit;
5835 ("invalid Form parameter for pragma%", Form);
5838 -- Case with no name, supplied, affects scope table entry
5842 (Scope_Stack.Last).Component_Alignment_Default := Atype;
5844 -- Case of name supplied
5847 Check_Arg_Is_Local_Name (Name);
5849 Typ := Entity (Name);
5852 or else Rep_Item_Too_Early (Typ, N)
5856 Typ := Underlying_Type (Typ);
5859 if not Is_Record_Type (Typ)
5860 and then not Is_Array_Type (Typ)
5863 ("Name parameter of pragma% must identify record or " &
5864 "array type", Name);
5867 -- An explicit Component_Alignment pragma overrides an
5868 -- implicit pragma Pack, but not an explicit one.
5870 if not Has_Pragma_Pack (Base_Type (Typ)) then
5871 Set_Is_Packed (Base_Type (Typ), False);
5872 Set_Component_Alignment (Base_Type (Typ), Atype);
5875 end Component_AlignmentP;
5881 -- pragma Controlled (first_subtype_LOCAL_NAME);
5883 when Pragma_Controlled => Controlled : declare
5887 Check_No_Identifiers;
5888 Check_Arg_Count (1);
5889 Check_Arg_Is_Local_Name (Arg1);
5890 Arg := Expression (Arg1);
5892 if not Is_Entity_Name (Arg)
5893 or else not Is_Access_Type (Entity (Arg))
5895 Error_Pragma_Arg ("pragma% requires access type", Arg1);
5897 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
5905 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
5906 -- [Entity =>] LOCAL_NAME);
5908 when Pragma_Convention => Convention : declare
5911 pragma Warnings (Off, C);
5912 pragma Warnings (Off, E);
5914 Check_Arg_Order ((Name_Convention, Name_Entity));
5915 Check_Ada_83_Warning;
5916 Check_Arg_Count (2);
5917 Process_Convention (C, E);
5920 ---------------------------
5921 -- Convention_Identifier --
5922 ---------------------------
5924 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
5925 -- [Convention =>] convention_IDENTIFIER);
5927 when Pragma_Convention_Identifier => Convention_Identifier : declare
5933 Check_Arg_Order ((Name_Name, Name_Convention));
5934 Check_Arg_Count (2);
5935 Check_Optional_Identifier (Arg1, Name_Name);
5936 Check_Optional_Identifier (Arg2, Name_Convention);
5937 Check_Arg_Is_Identifier (Arg1);
5938 Check_Arg_Is_Identifier (Arg2);
5939 Idnam := Chars (Expression (Arg1));
5940 Cname := Chars (Expression (Arg2));
5942 if Is_Convention_Name (Cname) then
5943 Record_Convention_Identifier
5944 (Idnam, Get_Convention_Id (Cname));
5947 ("second arg for % pragma must be convention", Arg2);
5949 end Convention_Identifier;
5955 -- pragma CPP_Class ([Entity =>] local_NAME)
5957 when Pragma_CPP_Class => CPP_Class : declare
5962 if Warn_On_Obsolescent_Feature then
5964 ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" &
5965 " by pragma import?", N);
5969 Check_Arg_Count (1);
5970 Check_Optional_Identifier (Arg1, Name_Entity);
5971 Check_Arg_Is_Local_Name (Arg1);
5973 Arg := Expression (Arg1);
5976 if Etype (Arg) = Any_Type then
5980 if not Is_Entity_Name (Arg)
5981 or else not Is_Type (Entity (Arg))
5983 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
5986 Typ := Entity (Arg);
5988 if not Is_Tagged_Type (Typ) then
5989 Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1);
5992 -- Types treated as CPP classes are treated as limited, but we
5993 -- don't require them to be declared this way. A warning is issued
5994 -- to encourage the user to declare them as limited. This is not
5995 -- an error, for compatibility reasons, because these types have
5996 -- been supported this way for some time.
5998 if not Is_Limited_Type (Typ) then
6000 ("imported 'C'P'P type should be " &
6001 "explicitly declared limited?",
6002 Get_Pragma_Arg (Arg1));
6004 ("\type will be considered limited",
6005 Get_Pragma_Arg (Arg1));
6008 Set_Is_CPP_Class (Typ);
6009 Set_Is_Limited_Record (Typ);
6010 Set_Convention (Typ, Convention_CPP);
6013 ---------------------
6014 -- CPP_Constructor --
6015 ---------------------
6017 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME
6018 -- [, [External_Name =>] static_string_EXPRESSION ]
6019 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6021 when Pragma_CPP_Constructor => CPP_Constructor : declare
6027 Check_At_Least_N_Arguments (1);
6028 Check_At_Most_N_Arguments (3);
6029 Check_Optional_Identifier (Arg1, Name_Entity);
6030 Check_Arg_Is_Local_Name (Arg1);
6032 Id := Expression (Arg1);
6033 Find_Program_Unit_Name (Id);
6035 -- If we did not find the name, we are done
6037 if Etype (Id) = Any_Type then
6041 Def_Id := Entity (Id);
6043 if Ekind (Def_Id) = E_Function
6044 and then Is_Class_Wide_Type (Etype (Def_Id))
6045 and then Is_CPP_Class (Etype (Etype (Def_Id)))
6047 if Arg_Count >= 2 then
6048 Set_Imported (Def_Id);
6049 Set_Is_Public (Def_Id);
6050 Process_Interface_Name (Def_Id, Arg2, Arg3);
6053 if No (Parameter_Specifications (Parent (Def_Id))) then
6054 Set_Has_Completion (Def_Id);
6055 Set_Is_Constructor (Def_Id);
6058 ("non-default constructors not implemented", Arg1);
6063 ("pragma% requires function returning a 'C'P'P_Class type",
6066 end CPP_Constructor;
6072 when Pragma_CPP_Virtual => CPP_Virtual : declare
6074 if Warn_On_Obsolescent_Feature then
6076 ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " &
6085 when Pragma_CPP_Vtable => CPP_Vtable : declare
6087 if Warn_On_Obsolescent_Feature then
6089 ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " &
6098 -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
6100 when Pragma_Debug => Debug : declare
6108 (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
6111 if Arg_Count = 2 then
6114 Left_Opnd => Relocate_Node (Cond),
6115 Right_Opnd => Expression (Arg1));
6118 -- Rewrite into a conditional with an appropriate condition. We
6119 -- wrap the procedure call in a block so that overhead from e.g.
6120 -- use of the secondary stack does not generate execution overhead
6121 -- for suppressed conditions.
6123 Rewrite (N, Make_Implicit_If_Statement (N,
6125 Then_Statements => New_List (
6126 Make_Block_Statement (Loc,
6127 Handled_Statement_Sequence =>
6128 Make_Handled_Sequence_Of_Statements (Loc,
6129 Statements => New_List (
6130 Relocate_Node (Debug_Statement (N))))))));
6138 -- pragma Debug_Policy (Check | Ignore)
6140 when Pragma_Debug_Policy =>
6142 Check_Arg_Count (1);
6143 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
6144 Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
6146 ---------------------
6147 -- Detect_Blocking --
6148 ---------------------
6150 -- pragma Detect_Blocking;
6152 when Pragma_Detect_Blocking =>
6154 Check_Arg_Count (0);
6155 Check_Valid_Configuration_Pragma;
6156 Detect_Blocking := True;
6162 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
6164 when Pragma_Discard_Names => Discard_Names : declare
6169 Check_Ada_83_Warning;
6171 -- Deal with configuration pragma case
6173 if Arg_Count = 0 and then Is_Configuration_Pragma then
6174 Global_Discard_Names := True;
6177 -- Otherwise, check correct appropriate context
6180 Check_Is_In_Decl_Part_Or_Package_Spec;
6182 if Arg_Count = 0 then
6184 -- If there is no parameter, then from now on this pragma
6185 -- applies to any enumeration, exception or tagged type
6186 -- defined in the current declarative part, and recursively
6187 -- to any nested scope.
6189 Set_Discard_Names (Current_Scope);
6193 Check_Arg_Count (1);
6194 Check_Optional_Identifier (Arg1, Name_On);
6195 Check_Arg_Is_Local_Name (Arg1);
6196 E_Id := Expression (Arg1);
6198 if Etype (E_Id) = Any_Type then
6204 if (Is_First_Subtype (E)
6205 and then (Is_Enumeration_Type (E)
6206 or else Is_Tagged_Type (E)))
6207 or else Ekind (E) = E_Exception
6209 Set_Discard_Names (E);
6212 ("inappropriate entity for pragma%", Arg1);
6222 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
6224 when Pragma_Elaborate => Elaborate : declare
6229 -- Pragma must be in context items list of a compilation unit
6231 if not Is_In_Context_Clause then
6235 -- Must be at least one argument
6237 if Arg_Count = 0 then
6238 Error_Pragma ("pragma% requires at least one argument");
6241 -- In Ada 83 mode, there can be no items following it in the
6242 -- context list except other pragmas and implicit with clauses
6243 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
6244 -- placement rule does not apply.
6246 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
6248 while Present (Citem) loop
6249 if Nkind (Citem) = N_Pragma
6250 or else (Nkind (Citem) = N_With_Clause
6251 and then Implicit_With (Citem))
6256 ("(Ada 83) pragma% must be at end of context clause");
6263 -- Finally, the arguments must all be units mentioned in a with
6264 -- clause in the same context clause. Note we already checked (in
6265 -- Par.Prag) that the arguments are all identifiers or selected
6269 Outer : while Present (Arg) loop
6270 Citem := First (List_Containing (N));
6271 Inner : while Citem /= N loop
6272 if Nkind (Citem) = N_With_Clause
6273 and then Same_Name (Name (Citem), Expression (Arg))
6275 Set_Elaborate_Present (Citem, True);
6276 Set_Unit_Name (Expression (Arg), Name (Citem));
6278 -- With the pragma present, elaboration calls on
6279 -- subprograms from the named unit need no further
6280 -- checks, as long as the pragma appears in the current
6281 -- compilation unit. If the pragma appears in some unit
6282 -- in the context, there might still be a need for an
6283 -- Elaborate_All_Desirable from the current compilation
6284 -- to the named unit, so we keep the check enabled.
6286 if In_Extended_Main_Source_Unit (N) then
6287 Set_Suppress_Elaboration_Warnings
6288 (Entity (Name (Citem)));
6299 ("argument of pragma% is not with'ed unit", Arg);
6305 -- Give a warning if operating in static mode with -gnatwl
6306 -- (elaboration warnings enabled) switch set.
6308 if Elab_Warnings and not Dynamic_Elaboration_Checks then
6310 ("?use of pragma Elaborate may not be safe", N);
6312 ("?use pragma Elaborate_All instead if possible", N);
6320 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
6322 when Pragma_Elaborate_All => Elaborate_All : declare
6327 Check_Ada_83_Warning;
6329 -- Pragma must be in context items list of a compilation unit
6331 if not Is_In_Context_Clause then
6335 -- Must be at least one argument
6337 if Arg_Count = 0 then
6338 Error_Pragma ("pragma% requires at least one argument");
6341 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
6342 -- have to appear at the end of the context clause, but may
6343 -- appear mixed in with other items, even in Ada 83 mode.
6345 -- Final check: the arguments must all be units mentioned in
6346 -- a with clause in the same context clause. Note that we
6347 -- already checked (in Par.Prag) that all the arguments are
6348 -- either identifiers or selected components.
6351 Outr : while Present (Arg) loop
6352 Citem := First (List_Containing (N));
6353 Innr : while Citem /= N loop
6354 if Nkind (Citem) = N_With_Clause
6355 and then Same_Name (Name (Citem), Expression (Arg))
6357 Set_Elaborate_All_Present (Citem, True);
6358 Set_Unit_Name (Expression (Arg), Name (Citem));
6360 -- Suppress warnings and elaboration checks on the named
6361 -- unit if the pragma is in the current compilation, as
6362 -- for pragma Elaborate.
6364 if In_Extended_Main_Source_Unit (N) then
6365 Set_Suppress_Elaboration_Warnings
6366 (Entity (Name (Citem)));
6375 Set_Error_Posted (N);
6377 ("argument of pragma% is not with'ed unit", Arg);
6384 --------------------
6385 -- Elaborate_Body --
6386 --------------------
6388 -- pragma Elaborate_Body [( library_unit_NAME )];
6390 when Pragma_Elaborate_Body => Elaborate_Body : declare
6391 Cunit_Node : Node_Id;
6392 Cunit_Ent : Entity_Id;
6395 Check_Ada_83_Warning;
6396 Check_Valid_Library_Unit_Pragma;
6398 if Nkind (N) = N_Null_Statement then
6402 Cunit_Node := Cunit (Current_Sem_Unit);
6403 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
6405 if Nkind (Unit (Cunit_Node)) = N_Package_Body
6407 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
6409 Error_Pragma ("pragma% must refer to a spec, not a body");
6411 Set_Body_Required (Cunit_Node, True);
6412 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
6414 -- If we are in dynamic elaboration mode, then we suppress
6415 -- elaboration warnings for the unit, since it is definitely
6416 -- fine NOT to do dynamic checks at the first level (and such
6417 -- checks will be suppressed because no elaboration boolean
6418 -- is created for Elaborate_Body packages).
6420 -- But in the static model of elaboration, Elaborate_Body is
6421 -- definitely NOT good enough to ensure elaboration safety on
6422 -- its own, since the body may WITH other units that are not
6423 -- safe from an elaboration point of view, so a client must
6424 -- still do an Elaborate_All on such units.
6426 -- Debug flag -gnatdD restores the old behavior of 3.13,
6427 -- where Elaborate_Body always suppressed elab warnings.
6429 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
6430 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
6435 ------------------------
6436 -- Elaboration_Checks --
6437 ------------------------
6439 -- pragma Elaboration_Checks (Static | Dynamic);
6441 when Pragma_Elaboration_Checks =>
6443 Check_Arg_Count (1);
6444 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
6445 Dynamic_Elaboration_Checks :=
6446 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
6452 -- pragma Eliminate (
6453 -- [Unit_Name =>] IDENTIFIER |
6454 -- SELECTED_COMPONENT
6455 -- [,[Entity =>] IDENTIFIER |
6456 -- SELECTED_COMPONENT |
6458 -- [,]OVERLOADING_RESOLUTION);
6460 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
6463 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
6466 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
6468 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
6469 -- Result_Type => result_SUBTYPE_NAME]
6471 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
6472 -- SUBTYPE_NAME ::= STRING_LITERAL
6474 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
6475 -- SOURCE_TRACE ::= STRING_LITERAL
6477 when Pragma_Eliminate => Eliminate : declare
6478 Args : Args_List (1 .. 5);
6479 Names : constant Name_List (1 .. 5) := (
6482 Name_Parameter_Types,
6484 Name_Source_Location);
6486 Unit_Name : Node_Id renames Args (1);
6487 Entity : Node_Id renames Args (2);
6488 Parameter_Types : Node_Id renames Args (3);
6489 Result_Type : Node_Id renames Args (4);
6490 Source_Location : Node_Id renames Args (5);
6494 Check_Valid_Configuration_Pragma;
6495 Gather_Associations (Names, Args);
6497 if No (Unit_Name) then
6498 Error_Pragma ("missing Unit_Name argument for pragma%");
6502 and then (Present (Parameter_Types)
6504 Present (Result_Type)
6506 Present (Source_Location))
6508 Error_Pragma ("missing Entity argument for pragma%");
6511 if (Present (Parameter_Types)
6513 Present (Result_Type))
6515 Present (Source_Location)
6518 ("parameter profile and source location cannot " &
6519 "be used together in pragma%");
6522 Process_Eliminate_Pragma
6536 -- [ Convention =>] convention_IDENTIFIER,
6537 -- [ Entity =>] local_NAME
6538 -- [, [External_Name =>] static_string_EXPRESSION ]
6539 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6541 when Pragma_Export => Export : declare
6545 pragma Warnings (Off, C);
6548 Check_Ada_83_Warning;
6554 Check_At_Least_N_Arguments (2);
6555 Check_At_Most_N_Arguments (4);
6556 Process_Convention (C, Def_Id);
6558 if Ekind (Def_Id) /= E_Constant then
6559 Note_Possible_Modification (Expression (Arg2), Sure => False);
6562 Process_Interface_Name (Def_Id, Arg3, Arg4);
6563 Set_Exported (Def_Id, Arg2);
6565 -- If the entity is a deferred constant, propagate the
6566 -- information to the full view, because gigi elaborates
6567 -- the full view only.
6569 if Ekind (Def_Id) = E_Constant
6570 and then Present (Full_View (Def_Id))
6573 Id2 : constant Entity_Id := Full_View (Def_Id);
6575 Set_Is_Exported (Id2, Is_Exported (Def_Id));
6576 Set_First_Rep_Item (Id2, First_Rep_Item (Def_Id));
6577 Set_Interface_Name (Id2, Einfo.Interface_Name (Def_Id));
6582 ----------------------
6583 -- Export_Exception --
6584 ----------------------
6586 -- pragma Export_Exception (
6587 -- [Internal =>] LOCAL_NAME
6588 -- [, [External =>] EXTERNAL_SYMBOL]
6589 -- [, [Form =>] Ada | VMS]
6590 -- [, [Code =>] static_integer_EXPRESSION]);
6592 when Pragma_Export_Exception => Export_Exception : declare
6593 Args : Args_List (1 .. 4);
6594 Names : constant Name_List (1 .. 4) := (
6600 Internal : Node_Id renames Args (1);
6601 External : Node_Id renames Args (2);
6602 Form : Node_Id renames Args (3);
6603 Code : Node_Id renames Args (4);
6606 if Inside_A_Generic then
6607 Error_Pragma ("pragma% cannot be used for generic entities");
6610 Gather_Associations (Names, Args);
6611 Process_Extended_Import_Export_Exception_Pragma (
6612 Arg_Internal => Internal,
6613 Arg_External => External,
6617 if not Is_VMS_Exception (Entity (Internal)) then
6618 Set_Exported (Entity (Internal), Internal);
6620 end Export_Exception;
6622 ---------------------
6623 -- Export_Function --
6624 ---------------------
6626 -- pragma Export_Function (
6627 -- [Internal =>] LOCAL_NAME
6628 -- [, [External =>] EXTERNAL_SYMBOL]
6629 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6630 -- [, [Result_Type =>] TYPE_DESIGNATOR]
6631 -- [, [Mechanism =>] MECHANISM]
6632 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
6634 -- EXTERNAL_SYMBOL ::=
6636 -- | static_string_EXPRESSION
6638 -- PARAMETER_TYPES ::=
6640 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6642 -- TYPE_DESIGNATOR ::=
6644 -- | subtype_Name ' Access
6648 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6650 -- MECHANISM_ASSOCIATION ::=
6651 -- [formal_parameter_NAME =>] MECHANISM_NAME
6653 -- MECHANISM_NAME ::=
6656 -- | Descriptor [([Class =>] CLASS_NAME)]
6658 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6660 when Pragma_Export_Function => Export_Function : declare
6661 Args : Args_List (1 .. 6);
6662 Names : constant Name_List (1 .. 6) := (
6665 Name_Parameter_Types,
6668 Name_Result_Mechanism);
6670 Internal : Node_Id renames Args (1);
6671 External : Node_Id renames Args (2);
6672 Parameter_Types : Node_Id renames Args (3);
6673 Result_Type : Node_Id renames Args (4);
6674 Mechanism : Node_Id renames Args (5);
6675 Result_Mechanism : Node_Id renames Args (6);
6679 Gather_Associations (Names, Args);
6680 Process_Extended_Import_Export_Subprogram_Pragma (
6681 Arg_Internal => Internal,
6682 Arg_External => External,
6683 Arg_Parameter_Types => Parameter_Types,
6684 Arg_Result_Type => Result_Type,
6685 Arg_Mechanism => Mechanism,
6686 Arg_Result_Mechanism => Result_Mechanism);
6687 end Export_Function;
6693 -- pragma Export_Object (
6694 -- [Internal =>] LOCAL_NAME
6695 -- [, [External =>] EXTERNAL_SYMBOL]
6696 -- [, [Size =>] EXTERNAL_SYMBOL]);
6698 -- EXTERNAL_SYMBOL ::=
6700 -- | static_string_EXPRESSION
6702 -- PARAMETER_TYPES ::=
6704 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6706 -- TYPE_DESIGNATOR ::=
6708 -- | subtype_Name ' Access
6712 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6714 -- MECHANISM_ASSOCIATION ::=
6715 -- [formal_parameter_NAME =>] MECHANISM_NAME
6717 -- MECHANISM_NAME ::=
6720 -- | Descriptor [([Class =>] CLASS_NAME)]
6722 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6724 when Pragma_Export_Object => Export_Object : declare
6725 Args : Args_List (1 .. 3);
6726 Names : constant Name_List (1 .. 3) := (
6731 Internal : Node_Id renames Args (1);
6732 External : Node_Id renames Args (2);
6733 Size : Node_Id renames Args (3);
6737 Gather_Associations (Names, Args);
6738 Process_Extended_Import_Export_Object_Pragma (
6739 Arg_Internal => Internal,
6740 Arg_External => External,
6744 ----------------------
6745 -- Export_Procedure --
6746 ----------------------
6748 -- pragma Export_Procedure (
6749 -- [Internal =>] LOCAL_NAME
6750 -- [, [External =>] EXTERNAL_SYMBOL]
6751 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6752 -- [, [Mechanism =>] MECHANISM]);
6754 -- EXTERNAL_SYMBOL ::=
6756 -- | static_string_EXPRESSION
6758 -- PARAMETER_TYPES ::=
6760 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6762 -- TYPE_DESIGNATOR ::=
6764 -- | subtype_Name ' Access
6768 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6770 -- MECHANISM_ASSOCIATION ::=
6771 -- [formal_parameter_NAME =>] MECHANISM_NAME
6773 -- MECHANISM_NAME ::=
6776 -- | Descriptor [([Class =>] CLASS_NAME)]
6778 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6780 when Pragma_Export_Procedure => Export_Procedure : declare
6781 Args : Args_List (1 .. 4);
6782 Names : constant Name_List (1 .. 4) := (
6785 Name_Parameter_Types,
6788 Internal : Node_Id renames Args (1);
6789 External : Node_Id renames Args (2);
6790 Parameter_Types : Node_Id renames Args (3);
6791 Mechanism : Node_Id renames Args (4);
6795 Gather_Associations (Names, Args);
6796 Process_Extended_Import_Export_Subprogram_Pragma (
6797 Arg_Internal => Internal,
6798 Arg_External => External,
6799 Arg_Parameter_Types => Parameter_Types,
6800 Arg_Mechanism => Mechanism);
6801 end Export_Procedure;
6807 -- pragma Export_Value (
6808 -- [Value =>] static_integer_EXPRESSION,
6809 -- [Link_Name =>] static_string_EXPRESSION);
6811 when Pragma_Export_Value =>
6813 Check_Arg_Order ((Name_Value, Name_Link_Name));
6814 Check_Arg_Count (2);
6816 Check_Optional_Identifier (Arg1, Name_Value);
6817 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6819 Check_Optional_Identifier (Arg2, Name_Link_Name);
6820 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
6822 -----------------------------
6823 -- Export_Valued_Procedure --
6824 -----------------------------
6826 -- pragma Export_Valued_Procedure (
6827 -- [Internal =>] LOCAL_NAME
6828 -- [, [External =>] EXTERNAL_SYMBOL,]
6829 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6830 -- [, [Mechanism =>] MECHANISM]);
6832 -- EXTERNAL_SYMBOL ::=
6834 -- | static_string_EXPRESSION
6836 -- PARAMETER_TYPES ::=
6838 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6840 -- TYPE_DESIGNATOR ::=
6842 -- | subtype_Name ' Access
6846 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6848 -- MECHANISM_ASSOCIATION ::=
6849 -- [formal_parameter_NAME =>] MECHANISM_NAME
6851 -- MECHANISM_NAME ::=
6854 -- | Descriptor [([Class =>] CLASS_NAME)]
6856 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6858 when Pragma_Export_Valued_Procedure =>
6859 Export_Valued_Procedure : declare
6860 Args : Args_List (1 .. 4);
6861 Names : constant Name_List (1 .. 4) := (
6864 Name_Parameter_Types,
6867 Internal : Node_Id renames Args (1);
6868 External : Node_Id renames Args (2);
6869 Parameter_Types : Node_Id renames Args (3);
6870 Mechanism : Node_Id renames Args (4);
6874 Gather_Associations (Names, Args);
6875 Process_Extended_Import_Export_Subprogram_Pragma (
6876 Arg_Internal => Internal,
6877 Arg_External => External,
6878 Arg_Parameter_Types => Parameter_Types,
6879 Arg_Mechanism => Mechanism);
6880 end Export_Valued_Procedure;
6886 -- pragma Extend_System ([Name =>] Identifier);
6888 when Pragma_Extend_System => Extend_System : declare
6891 Check_Valid_Configuration_Pragma;
6892 Check_Arg_Count (1);
6893 Check_Optional_Identifier (Arg1, Name_Name);
6894 Check_Arg_Is_Identifier (Arg1);
6896 Get_Name_String (Chars (Expression (Arg1)));
6899 and then Name_Buffer (1 .. 4) = "aux_"
6901 if Present (System_Extend_Pragma_Arg) then
6902 if Chars (Expression (Arg1)) =
6903 Chars (Expression (System_Extend_Pragma_Arg))
6907 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
6908 Error_Pragma ("pragma% conflicts with that #");
6912 System_Extend_Pragma_Arg := Arg1;
6914 if not GNAT_Mode then
6915 System_Extend_Unit := Arg1;
6919 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
6923 ------------------------
6924 -- Extensions_Allowed --
6925 ------------------------
6927 -- pragma Extensions_Allowed (ON | OFF);
6929 when Pragma_Extensions_Allowed =>
6931 Check_Arg_Count (1);
6932 Check_No_Identifiers;
6933 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
6935 if Chars (Expression (Arg1)) = Name_On then
6936 Extensions_Allowed := True;
6938 Extensions_Allowed := False;
6945 -- pragma External (
6946 -- [ Convention =>] convention_IDENTIFIER,
6947 -- [ Entity =>] local_NAME
6948 -- [, [External_Name =>] static_string_EXPRESSION ]
6949 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6951 when Pragma_External => External : declare
6955 pragma Warnings (Off, C);
6964 Check_At_Least_N_Arguments (2);
6965 Check_At_Most_N_Arguments (4);
6966 Process_Convention (C, Def_Id);
6967 Note_Possible_Modification (Expression (Arg2), Sure => False);
6968 Process_Interface_Name (Def_Id, Arg3, Arg4);
6969 Set_Exported (Def_Id, Arg2);
6972 --------------------------
6973 -- External_Name_Casing --
6974 --------------------------
6976 -- pragma External_Name_Casing (
6977 -- UPPERCASE | LOWERCASE
6978 -- [, AS_IS | UPPERCASE | LOWERCASE]);
6980 when Pragma_External_Name_Casing => External_Name_Casing : declare
6983 Check_No_Identifiers;
6985 if Arg_Count = 2 then
6987 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
6989 case Chars (Get_Pragma_Arg (Arg2)) is
6991 Opt.External_Name_Exp_Casing := As_Is;
6993 when Name_Uppercase =>
6994 Opt.External_Name_Exp_Casing := Uppercase;
6996 when Name_Lowercase =>
6997 Opt.External_Name_Exp_Casing := Lowercase;
7004 Check_Arg_Count (1);
7007 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
7009 case Chars (Get_Pragma_Arg (Arg1)) is
7010 when Name_Uppercase =>
7011 Opt.External_Name_Imp_Casing := Uppercase;
7013 when Name_Lowercase =>
7014 Opt.External_Name_Imp_Casing := Lowercase;
7019 end External_Name_Casing;
7021 --------------------------
7022 -- Favor_Top_Level --
7023 --------------------------
7025 -- pragma Favor_Top_Level (type_NAME);
7027 when Pragma_Favor_Top_Level => Favor_Top_Level : declare
7028 Named_Entity : Entity_Id;
7032 Check_No_Identifiers;
7033 Check_Arg_Count (1);
7034 Check_Arg_Is_Local_Name (Arg1);
7035 Named_Entity := Entity (Expression (Arg1));
7037 -- If it's an access-to-subprogram type (in particular, not a
7038 -- subtype), set the flag on that type.
7040 if Is_Access_Subprogram_Type (Named_Entity) then
7041 Set_Can_Use_Internal_Rep (Named_Entity, False);
7043 -- Otherwise it's an error (name denotes the wrong sort of entity)
7047 ("access-to-subprogram type expected", Expression (Arg1));
7049 end Favor_Top_Level;
7055 -- pragma Fast_Math;
7057 when Pragma_Fast_Math =>
7059 Check_No_Identifiers;
7060 Check_Valid_Configuration_Pragma;
7063 ---------------------------
7064 -- Finalize_Storage_Only --
7065 ---------------------------
7067 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
7069 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
7070 Assoc : constant Node_Id := Arg1;
7071 Type_Id : constant Node_Id := Expression (Assoc);
7075 Check_No_Identifiers;
7076 Check_Arg_Count (1);
7077 Check_Arg_Is_Local_Name (Arg1);
7079 Find_Type (Type_Id);
7080 Typ := Entity (Type_Id);
7083 or else Rep_Item_Too_Early (Typ, N)
7087 Typ := Underlying_Type (Typ);
7090 if not Is_Controlled (Typ) then
7091 Error_Pragma ("pragma% must specify controlled type");
7094 Check_First_Subtype (Arg1);
7096 if Finalize_Storage_Only (Typ) then
7097 Error_Pragma ("duplicate pragma%, only one allowed");
7099 elsif not Rep_Item_Too_Late (Typ, N) then
7100 Set_Finalize_Storage_Only (Base_Type (Typ), True);
7102 end Finalize_Storage;
7104 --------------------------
7105 -- Float_Representation --
7106 --------------------------
7108 -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
7110 -- FLOAT_REP ::= VAX_Float | IEEE_Float
7112 when Pragma_Float_Representation => Float_Representation : declare
7120 if Arg_Count = 1 then
7121 Check_Valid_Configuration_Pragma;
7123 Check_Arg_Count (2);
7124 Check_Optional_Identifier (Arg2, Name_Entity);
7125 Check_Arg_Is_Local_Name (Arg2);
7128 Check_No_Identifier (Arg1);
7129 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
7131 if not OpenVMS_On_Target then
7132 if Chars (Expression (Arg1)) = Name_VAX_Float then
7134 ("?pragma% ignored (applies only to Open'V'M'S)");
7140 -- One argument case
7142 if Arg_Count = 1 then
7143 if Chars (Expression (Arg1)) = Name_VAX_Float then
7144 if Opt.Float_Format = 'I' then
7145 Error_Pragma ("'I'E'E'E format previously specified");
7148 Opt.Float_Format := 'V';
7151 if Opt.Float_Format = 'V' then
7152 Error_Pragma ("'V'A'X format previously specified");
7155 Opt.Float_Format := 'I';
7158 Set_Standard_Fpt_Formats;
7160 -- Two argument case
7163 Argx := Get_Pragma_Arg (Arg2);
7165 if not Is_Entity_Name (Argx)
7166 or else not Is_Floating_Point_Type (Entity (Argx))
7169 ("second argument of% pragma must be floating-point type",
7173 Ent := Entity (Argx);
7174 Digs := UI_To_Int (Digits_Value (Ent));
7176 -- Two arguments, VAX_Float case
7178 if Chars (Expression (Arg1)) = Name_VAX_Float then
7180 when 6 => Set_F_Float (Ent);
7181 when 9 => Set_D_Float (Ent);
7182 when 15 => Set_G_Float (Ent);
7186 ("wrong digits value, must be 6,9 or 15", Arg2);
7189 -- Two arguments, IEEE_Float case
7193 when 6 => Set_IEEE_Short (Ent);
7194 when 15 => Set_IEEE_Long (Ent);
7198 ("wrong digits value, must be 6 or 15", Arg2);
7202 end Float_Representation;
7208 -- pragma Ident (static_string_EXPRESSION)
7210 -- Note: pragma Comment shares this processing. Pragma Comment
7211 -- is identical to Ident, except that the restriction of the
7212 -- argument to 31 characters and the placement restrictions
7213 -- are not enforced for pragma Comment.
7215 when Pragma_Ident | Pragma_Comment => Ident : declare
7220 Check_Arg_Count (1);
7221 Check_No_Identifiers;
7222 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7224 -- For pragma Ident, preserve DEC compatibility by requiring
7225 -- the pragma to appear in a declarative part or package spec.
7227 if Prag_Id = Pragma_Ident then
7228 Check_Is_In_Decl_Part_Or_Package_Spec;
7231 Str := Expr_Value_S (Expression (Arg1));
7238 GP := Parent (Parent (N));
7240 if Nkind (GP) = N_Package_Declaration
7242 Nkind (GP) = N_Generic_Package_Declaration
7247 -- If we have a compilation unit, then record the ident
7248 -- value, checking for improper duplication.
7250 if Nkind (GP) = N_Compilation_Unit then
7251 CS := Ident_String (Current_Sem_Unit);
7253 if Present (CS) then
7255 -- For Ident, we do not permit multiple instances
7257 if Prag_Id = Pragma_Ident then
7258 Error_Pragma ("duplicate% pragma not permitted");
7260 -- For Comment, we concatenate the string, unless we
7261 -- want to preserve the tree structure for ASIS.
7263 elsif not ASIS_Mode then
7264 Start_String (Strval (CS));
7265 Store_String_Char (' ');
7266 Store_String_Chars (Strval (Str));
7267 Set_Strval (CS, End_String);
7271 -- In VMS, the effect of IDENT is achieved by passing
7272 -- IDENTIFICATION=name as a --for-linker switch.
7274 if OpenVMS_On_Target then
7277 ("--for-linker=IDENTIFICATION=");
7278 String_To_Name_Buffer (Strval (Str));
7279 Store_String_Chars (Name_Buffer (1 .. Name_Len));
7281 -- Only the last processed IDENT is saved. The main
7282 -- purpose is so an IDENT associated with a main
7283 -- procedure will be used in preference to an IDENT
7284 -- associated with a with'd package.
7286 Replace_Linker_Option_String
7287 (End_String, "--for-linker=IDENTIFICATION=");
7290 Set_Ident_String (Current_Sem_Unit, Str);
7293 -- For subunits, we just ignore the Ident, since in GNAT
7294 -- these are not separate object files, and hence not
7295 -- separate units in the unit table.
7297 elsif Nkind (GP) = N_Subunit then
7300 -- Otherwise we have a misplaced pragma Ident, but we ignore
7301 -- this if we are in an instantiation, since it comes from
7302 -- a generic, and has no relevance to the instantiation.
7304 elsif Prag_Id = Pragma_Ident then
7305 if Instantiation_Location (Loc) = No_Location then
7306 Error_Pragma ("pragma% only allowed at outer level");
7312 --------------------------
7313 -- Implemented_By_Entry --
7314 --------------------------
7316 -- pragma Implemented_By_Entry (DIRECT_NAME);
7318 when Pragma_Implemented_By_Entry => Implemented_By_Entry : declare
7323 Check_Arg_Count (1);
7324 Check_No_Identifiers;
7325 Check_Arg_Is_Identifier (Arg1);
7326 Check_Arg_Is_Local_Name (Arg1);
7327 Ent := Entity (Expression (Arg1));
7329 -- Pragma Implemented_By_Entry must be applied only to protected
7330 -- synchronized or task interface primitives.
7332 if (Ekind (Ent) /= E_Function
7333 and then Ekind (Ent) /= E_Procedure)
7334 or else not Present (First_Formal (Ent))
7335 or else not Is_Concurrent_Interface (Etype (First_Formal (Ent)))
7338 ("pragma % must be applied to a concurrent interface " &
7342 if Einfo.Implemented_By_Entry (Ent)
7343 and then Warn_On_Redundant_Constructs
7345 Error_Pragma ("?duplicate pragma%!");
7347 Set_Implemented_By_Entry (Ent);
7350 end Implemented_By_Entry;
7352 -----------------------
7353 -- Implicit_Packing --
7354 -----------------------
7356 -- pragma Implicit_Packing;
7358 when Pragma_Implicit_Packing =>
7360 Check_Arg_Count (0);
7361 Implicit_Packing := True;
7368 -- [Convention =>] convention_IDENTIFIER,
7369 -- [Entity =>] local_NAME
7370 -- [, [External_Name =>] static_string_EXPRESSION ]
7371 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7373 when Pragma_Import =>
7374 Check_Ada_83_Warning;
7380 Check_At_Least_N_Arguments (2);
7381 Check_At_Most_N_Arguments (4);
7382 Process_Import_Or_Interface;
7384 ----------------------
7385 -- Import_Exception --
7386 ----------------------
7388 -- pragma Import_Exception (
7389 -- [Internal =>] LOCAL_NAME
7390 -- [, [External =>] EXTERNAL_SYMBOL]
7391 -- [, [Form =>] Ada | VMS]
7392 -- [, [Code =>] static_integer_EXPRESSION]);
7394 when Pragma_Import_Exception => Import_Exception : declare
7395 Args : Args_List (1 .. 4);
7396 Names : constant Name_List (1 .. 4) := (
7402 Internal : Node_Id renames Args (1);
7403 External : Node_Id renames Args (2);
7404 Form : Node_Id renames Args (3);
7405 Code : Node_Id renames Args (4);
7408 Gather_Associations (Names, Args);
7410 if Present (External) and then Present (Code) then
7412 ("cannot give both External and Code options for pragma%");
7415 Process_Extended_Import_Export_Exception_Pragma (
7416 Arg_Internal => Internal,
7417 Arg_External => External,
7421 if not Is_VMS_Exception (Entity (Internal)) then
7422 Set_Imported (Entity (Internal));
7424 end Import_Exception;
7426 ---------------------
7427 -- Import_Function --
7428 ---------------------
7430 -- pragma Import_Function (
7431 -- [Internal =>] LOCAL_NAME,
7432 -- [, [External =>] EXTERNAL_SYMBOL]
7433 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7434 -- [, [Result_Type =>] SUBTYPE_MARK]
7435 -- [, [Mechanism =>] MECHANISM]
7436 -- [, [Result_Mechanism =>] MECHANISM_NAME]
7437 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7439 -- EXTERNAL_SYMBOL ::=
7441 -- | static_string_EXPRESSION
7443 -- PARAMETER_TYPES ::=
7445 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7447 -- TYPE_DESIGNATOR ::=
7449 -- | subtype_Name ' Access
7453 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7455 -- MECHANISM_ASSOCIATION ::=
7456 -- [formal_parameter_NAME =>] MECHANISM_NAME
7458 -- MECHANISM_NAME ::=
7461 -- | Descriptor [([Class =>] CLASS_NAME)]
7463 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7465 when Pragma_Import_Function => Import_Function : declare
7466 Args : Args_List (1 .. 7);
7467 Names : constant Name_List (1 .. 7) := (
7470 Name_Parameter_Types,
7473 Name_Result_Mechanism,
7474 Name_First_Optional_Parameter);
7476 Internal : Node_Id renames Args (1);
7477 External : Node_Id renames Args (2);
7478 Parameter_Types : Node_Id renames Args (3);
7479 Result_Type : Node_Id renames Args (4);
7480 Mechanism : Node_Id renames Args (5);
7481 Result_Mechanism : Node_Id renames Args (6);
7482 First_Optional_Parameter : Node_Id renames Args (7);
7486 Gather_Associations (Names, Args);
7487 Process_Extended_Import_Export_Subprogram_Pragma (
7488 Arg_Internal => Internal,
7489 Arg_External => External,
7490 Arg_Parameter_Types => Parameter_Types,
7491 Arg_Result_Type => Result_Type,
7492 Arg_Mechanism => Mechanism,
7493 Arg_Result_Mechanism => Result_Mechanism,
7494 Arg_First_Optional_Parameter => First_Optional_Parameter);
7495 end Import_Function;
7501 -- pragma Import_Object (
7502 -- [Internal =>] LOCAL_NAME
7503 -- [, [External =>] EXTERNAL_SYMBOL]
7504 -- [, [Size =>] EXTERNAL_SYMBOL]);
7506 -- EXTERNAL_SYMBOL ::=
7508 -- | static_string_EXPRESSION
7510 when Pragma_Import_Object => Import_Object : declare
7511 Args : Args_List (1 .. 3);
7512 Names : constant Name_List (1 .. 3) := (
7517 Internal : Node_Id renames Args (1);
7518 External : Node_Id renames Args (2);
7519 Size : Node_Id renames Args (3);
7523 Gather_Associations (Names, Args);
7524 Process_Extended_Import_Export_Object_Pragma (
7525 Arg_Internal => Internal,
7526 Arg_External => External,
7530 ----------------------
7531 -- Import_Procedure --
7532 ----------------------
7534 -- pragma Import_Procedure (
7535 -- [Internal =>] LOCAL_NAME
7536 -- [, [External =>] EXTERNAL_SYMBOL]
7537 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7538 -- [, [Mechanism =>] MECHANISM]
7539 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7541 -- EXTERNAL_SYMBOL ::=
7543 -- | static_string_EXPRESSION
7545 -- PARAMETER_TYPES ::=
7547 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7549 -- TYPE_DESIGNATOR ::=
7551 -- | subtype_Name ' Access
7555 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7557 -- MECHANISM_ASSOCIATION ::=
7558 -- [formal_parameter_NAME =>] MECHANISM_NAME
7560 -- MECHANISM_NAME ::=
7563 -- | Descriptor [([Class =>] CLASS_NAME)]
7565 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7567 when Pragma_Import_Procedure => Import_Procedure : declare
7568 Args : Args_List (1 .. 5);
7569 Names : constant Name_List (1 .. 5) := (
7572 Name_Parameter_Types,
7574 Name_First_Optional_Parameter);
7576 Internal : Node_Id renames Args (1);
7577 External : Node_Id renames Args (2);
7578 Parameter_Types : Node_Id renames Args (3);
7579 Mechanism : Node_Id renames Args (4);
7580 First_Optional_Parameter : Node_Id renames Args (5);
7584 Gather_Associations (Names, Args);
7585 Process_Extended_Import_Export_Subprogram_Pragma (
7586 Arg_Internal => Internal,
7587 Arg_External => External,
7588 Arg_Parameter_Types => Parameter_Types,
7589 Arg_Mechanism => Mechanism,
7590 Arg_First_Optional_Parameter => First_Optional_Parameter);
7591 end Import_Procedure;
7593 -----------------------------
7594 -- Import_Valued_Procedure --
7595 -----------------------------
7597 -- pragma Import_Valued_Procedure (
7598 -- [Internal =>] LOCAL_NAME
7599 -- [, [External =>] EXTERNAL_SYMBOL]
7600 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7601 -- [, [Mechanism =>] MECHANISM]
7602 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7604 -- EXTERNAL_SYMBOL ::=
7606 -- | static_string_EXPRESSION
7608 -- PARAMETER_TYPES ::=
7610 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7612 -- TYPE_DESIGNATOR ::=
7614 -- | subtype_Name ' Access
7618 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7620 -- MECHANISM_ASSOCIATION ::=
7621 -- [formal_parameter_NAME =>] MECHANISM_NAME
7623 -- MECHANISM_NAME ::=
7626 -- | Descriptor [([Class =>] CLASS_NAME)]
7628 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7630 when Pragma_Import_Valued_Procedure =>
7631 Import_Valued_Procedure : declare
7632 Args : Args_List (1 .. 5);
7633 Names : constant Name_List (1 .. 5) := (
7636 Name_Parameter_Types,
7638 Name_First_Optional_Parameter);
7640 Internal : Node_Id renames Args (1);
7641 External : Node_Id renames Args (2);
7642 Parameter_Types : Node_Id renames Args (3);
7643 Mechanism : Node_Id renames Args (4);
7644 First_Optional_Parameter : Node_Id renames Args (5);
7648 Gather_Associations (Names, Args);
7649 Process_Extended_Import_Export_Subprogram_Pragma (
7650 Arg_Internal => Internal,
7651 Arg_External => External,
7652 Arg_Parameter_Types => Parameter_Types,
7653 Arg_Mechanism => Mechanism,
7654 Arg_First_Optional_Parameter => First_Optional_Parameter);
7655 end Import_Valued_Procedure;
7657 ------------------------
7658 -- Initialize_Scalars --
7659 ------------------------
7661 -- pragma Initialize_Scalars;
7663 when Pragma_Initialize_Scalars =>
7665 Check_Arg_Count (0);
7666 Check_Valid_Configuration_Pragma;
7667 Check_Restriction (No_Initialize_Scalars, N);
7669 if not Restriction_Active (No_Initialize_Scalars) then
7670 Init_Or_Norm_Scalars := True;
7671 Initialize_Scalars := True;
7678 -- pragma Inline ( NAME {, NAME} );
7680 when Pragma_Inline =>
7682 -- Pragma is active if inlining option is active
7684 Process_Inline (Inline_Active);
7690 -- pragma Inline_Always ( NAME {, NAME} );
7692 when Pragma_Inline_Always =>
7693 Process_Inline (True);
7695 --------------------
7696 -- Inline_Generic --
7697 --------------------
7699 -- pragma Inline_Generic (NAME {, NAME});
7701 when Pragma_Inline_Generic =>
7702 Process_Generic_List;
7704 ----------------------
7705 -- Inspection_Point --
7706 ----------------------
7708 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
7710 when Pragma_Inspection_Point => Inspection_Point : declare
7715 if Arg_Count > 0 then
7718 Exp := Expression (Arg);
7721 if not Is_Entity_Name (Exp)
7722 or else not Is_Object (Entity (Exp))
7724 Error_Pragma_Arg ("object name required", Arg);
7731 end Inspection_Point;
7737 -- pragma Interface (
7738 -- [ Convention =>] convention_IDENTIFIER,
7739 -- [ Entity =>] local_NAME
7740 -- [, [External_Name =>] static_string_EXPRESSION ]
7741 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7743 when Pragma_Interface =>
7750 Check_At_Least_N_Arguments (2);
7751 Check_At_Most_N_Arguments (4);
7752 Process_Import_Or_Interface;
7754 --------------------
7755 -- Interface_Name --
7756 --------------------
7758 -- pragma Interface_Name (
7759 -- [ Entity =>] local_NAME
7760 -- [,[External_Name =>] static_string_EXPRESSION ]
7761 -- [,[Link_Name =>] static_string_EXPRESSION ]);
7763 when Pragma_Interface_Name => Interface_Name : declare
7772 ((Name_Entity, Name_External_Name, Name_Link_Name));
7773 Check_At_Least_N_Arguments (2);
7774 Check_At_Most_N_Arguments (3);
7775 Id := Expression (Arg1);
7778 if not Is_Entity_Name (Id) then
7780 ("first argument for pragma% must be entity name", Arg1);
7781 elsif Etype (Id) = Any_Type then
7784 Def_Id := Entity (Id);
7787 -- Special DEC-compatible processing for the object case, forces
7788 -- object to be imported.
7790 if Ekind (Def_Id) = E_Variable then
7791 Kill_Size_Check_Code (Def_Id);
7792 Note_Possible_Modification (Id, Sure => False);
7794 -- Initialization is not allowed for imported variable
7796 if Present (Expression (Parent (Def_Id)))
7797 and then Comes_From_Source (Expression (Parent (Def_Id)))
7799 Error_Msg_Sloc := Sloc (Def_Id);
7801 ("no initialization allowed for declaration of& #",
7805 -- For compatibility, support VADS usage of providing both
7806 -- pragmas Interface and Interface_Name to obtain the effect
7807 -- of a single Import pragma.
7809 if Is_Imported (Def_Id)
7810 and then Present (First_Rep_Item (Def_Id))
7811 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
7813 Pragma_Name (First_Rep_Item (Def_Id)) = Name_Interface
7817 Set_Imported (Def_Id);
7820 Set_Is_Public (Def_Id);
7821 Process_Interface_Name (Def_Id, Arg2, Arg3);
7824 -- Otherwise must be subprogram
7826 elsif not Is_Subprogram (Def_Id) then
7828 ("argument of pragma% is not subprogram", Arg1);
7831 Check_At_Most_N_Arguments (3);
7835 -- Loop through homonyms
7838 Def_Id := Get_Base_Subprogram (Hom_Id);
7840 if Is_Imported (Def_Id) then
7841 Process_Interface_Name (Def_Id, Arg2, Arg3);
7845 Hom_Id := Homonym (Hom_Id);
7847 exit when No (Hom_Id)
7848 or else Scope (Hom_Id) /= Current_Scope;
7853 ("argument of pragma% is not imported subprogram",
7859 -----------------------
7860 -- Interrupt_Handler --
7861 -----------------------
7863 -- pragma Interrupt_Handler (handler_NAME);
7865 when Pragma_Interrupt_Handler =>
7866 Check_Ada_83_Warning;
7867 Check_Arg_Count (1);
7868 Check_No_Identifiers;
7870 if No_Run_Time_Mode then
7871 Error_Msg_CRT ("Interrupt_Handler pragma", N);
7873 Check_Interrupt_Or_Attach_Handler;
7874 Process_Interrupt_Or_Attach_Handler;
7877 ------------------------
7878 -- Interrupt_Priority --
7879 ------------------------
7881 -- pragma Interrupt_Priority [(EXPRESSION)];
7883 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
7884 P : constant Node_Id := Parent (N);
7888 Check_Ada_83_Warning;
7890 if Arg_Count /= 0 then
7891 Arg := Expression (Arg1);
7892 Check_Arg_Count (1);
7893 Check_No_Identifiers;
7895 -- The expression must be analyzed in the special manner
7896 -- described in "Handling of Default and Per-Object
7897 -- Expressions" in sem.ads.
7899 Preanalyze_Spec_Expression (Arg, RTE (RE_Interrupt_Priority));
7902 if Nkind (P) /= N_Task_Definition
7903 and then Nkind (P) /= N_Protected_Definition
7908 elsif Has_Priority_Pragma (P) then
7909 Error_Pragma ("duplicate pragma% not allowed");
7912 Set_Has_Priority_Pragma (P, True);
7913 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7915 end Interrupt_Priority;
7917 ---------------------
7918 -- Interrupt_State --
7919 ---------------------
7921 -- pragma Interrupt_State (
7922 -- [Name =>] INTERRUPT_ID,
7923 -- [State =>] INTERRUPT_STATE);
7925 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
7926 -- INTERRUPT_STATE => System | Runtime | User
7928 -- Note: if the interrupt id is given as an identifier, then
7929 -- it must be one of the identifiers in Ada.Interrupts.Names.
7930 -- Otherwise it is given as a static integer expression which
7931 -- must be in the range of Ada.Interrupts.Interrupt_ID.
7933 when Pragma_Interrupt_State => Interrupt_State : declare
7935 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
7936 -- This is the entity Ada.Interrupts.Interrupt_ID;
7938 State_Type : Character;
7939 -- Set to 's'/'r'/'u' for System/Runtime/User
7942 -- Index to entry in Interrupt_States table
7945 -- Value of interrupt
7947 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
7948 -- The first argument to the pragma
7950 Int_Ent : Entity_Id;
7951 -- Interrupt entity in Ada.Interrupts.Names
7955 Check_Arg_Order ((Name_Name, Name_State));
7956 Check_Arg_Count (2);
7958 Check_Optional_Identifier (Arg1, Name_Name);
7959 Check_Optional_Identifier (Arg2, Name_State);
7960 Check_Arg_Is_Identifier (Arg2);
7962 -- First argument is identifier
7964 if Nkind (Arg1X) = N_Identifier then
7966 -- Search list of names in Ada.Interrupts.Names
7968 Int_Ent := First_Entity (RTE (RE_Names));
7970 if No (Int_Ent) then
7971 Error_Pragma_Arg ("invalid interrupt name", Arg1);
7973 elsif Chars (Int_Ent) = Chars (Arg1X) then
7974 Int_Val := Expr_Value (Constant_Value (Int_Ent));
7978 Next_Entity (Int_Ent);
7981 -- First argument is not an identifier, so it must be a
7982 -- static expression of type Ada.Interrupts.Interrupt_ID.
7985 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
7986 Int_Val := Expr_Value (Arg1X);
7988 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
7990 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
7993 ("value not in range of type " &
7994 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
8000 case Chars (Get_Pragma_Arg (Arg2)) is
8001 when Name_Runtime => State_Type := 'r';
8002 when Name_System => State_Type := 's';
8003 when Name_User => State_Type := 'u';
8006 Error_Pragma_Arg ("invalid interrupt state", Arg2);
8009 -- Check if entry is already stored
8011 IST_Num := Interrupt_States.First;
8013 -- If entry not found, add it
8015 if IST_Num > Interrupt_States.Last then
8016 Interrupt_States.Append
8017 ((Interrupt_Number => UI_To_Int (Int_Val),
8018 Interrupt_State => State_Type,
8019 Pragma_Loc => Loc));
8022 -- Case of entry for the same entry
8024 elsif Int_Val = Interrupt_States.Table (IST_Num).
8027 -- If state matches, done, no need to make redundant entry
8030 State_Type = Interrupt_States.Table (IST_Num).
8033 -- Otherwise if state does not match, error
8036 Interrupt_States.Table (IST_Num).Pragma_Loc;
8038 ("state conflicts with that given #", Arg2);
8042 IST_Num := IST_Num + 1;
8044 end Interrupt_State;
8046 ----------------------
8047 -- Java_Constructor --
8048 ----------------------
8050 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
8052 -- Also handles pragma CIL_Constructor
8054 when Pragma_CIL_Constructor | Pragma_Java_Constructor =>
8055 Java_Constructor : declare
8059 Convention : Convention_Id;
8063 Check_Arg_Count (1);
8064 Check_Optional_Identifier (Arg1, Name_Entity);
8065 Check_Arg_Is_Local_Name (Arg1);
8067 Id := Expression (Arg1);
8068 Find_Program_Unit_Name (Id);
8070 -- If we did not find the name, we are done
8072 if Etype (Id) = Any_Type then
8077 when Pragma_CIL_Constructor => Convention := Convention_CIL;
8078 when Pragma_Java_Constructor => Convention := Convention_Java;
8079 when others => null;
8082 Hom_Id := Entity (Id);
8084 -- Loop through homonyms
8087 Def_Id := Get_Base_Subprogram (Hom_Id);
8089 -- The constructor is required to be a function returning an
8090 -- access type whose designated type has convention Java/CIL.
8092 if Ekind (Def_Id) = E_Function
8094 (Is_Value_Type (Etype (Def_Id))
8096 (Ekind (Etype (Def_Id)) in Access_Kind
8099 (Designated_Type (Etype (Def_Id))) = Convention
8102 (Root_Type (Designated_Type (Etype (Def_Id)))) =
8105 Set_Is_Constructor (Def_Id);
8106 Set_Convention (Def_Id, Convention);
8107 Set_Is_Imported (Def_Id);
8110 if Convention = Convention_Java then
8112 ("pragma% requires function returning a " &
8113 "'Java access type", Arg1);
8115 pragma Assert (Convention = Convention_CIL);
8117 ("pragma% requires function returning a " &
8118 "'CIL access type", Arg1);
8122 Hom_Id := Homonym (Hom_Id);
8124 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
8126 end Java_Constructor;
8128 ----------------------
8129 -- Java_Interface --
8130 ----------------------
8132 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
8134 when Pragma_Java_Interface => Java_Interface : declare
8140 Check_Arg_Count (1);
8141 Check_Optional_Identifier (Arg1, Name_Entity);
8142 Check_Arg_Is_Local_Name (Arg1);
8144 Arg := Expression (Arg1);
8147 if Etype (Arg) = Any_Type then
8151 if not Is_Entity_Name (Arg)
8152 or else not Is_Type (Entity (Arg))
8154 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
8157 Typ := Underlying_Type (Entity (Arg));
8159 -- For now we simply check some of the semantic constraints
8160 -- on the type. This currently leaves out some restrictions
8161 -- on interface types, namely that the parent type must be
8162 -- java.lang.Object.Typ and that all primitives of the type
8163 -- should be declared abstract. ???
8165 if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then
8166 Error_Pragma_Arg ("pragma% requires an abstract "
8167 & "tagged type", Arg1);
8169 elsif not Has_Discriminants (Typ)
8170 or else Ekind (Etype (First_Discriminant (Typ)))
8171 /= E_Anonymous_Access_Type
8173 not Is_Class_Wide_Type
8174 (Designated_Type (Etype (First_Discriminant (Typ))))
8177 ("type must have a class-wide access discriminant", Arg1);
8185 -- pragma Keep_Names ([On => ] local_NAME);
8187 when Pragma_Keep_Names => Keep_Names : declare
8192 Check_Arg_Count (1);
8193 Check_Optional_Identifier (Arg1, Name_On);
8194 Check_Arg_Is_Local_Name (Arg1);
8196 Arg := Expression (Arg1);
8199 if Etype (Arg) = Any_Type then
8203 if not Is_Entity_Name (Arg)
8204 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
8207 ("pragma% requires a local enumeration type", Arg1);
8210 Set_Discard_Names (Entity (Arg), False);
8217 -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
8219 when Pragma_License =>
8221 Check_Arg_Count (1);
8222 Check_No_Identifiers;
8223 Check_Valid_Configuration_Pragma;
8224 Check_Arg_Is_Identifier (Arg1);
8227 Sind : constant Source_File_Index :=
8228 Source_Index (Current_Sem_Unit);
8231 case Chars (Get_Pragma_Arg (Arg1)) is
8233 Set_License (Sind, GPL);
8235 when Name_Modified_GPL =>
8236 Set_License (Sind, Modified_GPL);
8238 when Name_Restricted =>
8239 Set_License (Sind, Restricted);
8241 when Name_Unrestricted =>
8242 Set_License (Sind, Unrestricted);
8245 Error_Pragma_Arg ("invalid license name", Arg1);
8253 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
8255 when Pragma_Link_With => Link_With : declare
8261 if Operating_Mode = Generate_Code
8262 and then In_Extended_Main_Source_Unit (N)
8264 Check_At_Least_N_Arguments (1);
8265 Check_No_Identifiers;
8266 Check_Is_In_Decl_Part_Or_Package_Spec;
8267 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8271 while Present (Arg) loop
8272 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8274 -- Store argument, converting sequences of spaces
8275 -- to a single null character (this is one of the
8276 -- differences in processing between Link_With
8277 -- and Linker_Options).
8280 C : constant Char_Code := Get_Char_Code (' ');
8281 S : constant String_Id :=
8282 Strval (Expr_Value_S (Expression (Arg)));
8283 L : constant Nat := String_Length (S);
8286 procedure Skip_Spaces;
8287 -- Advance F past any spaces
8293 procedure Skip_Spaces is
8295 while F <= L and then Get_String_Char (S, F) = C loop
8300 -- Start of processing for Arg_Store
8303 Skip_Spaces; -- skip leading spaces
8305 -- Loop through characters, changing any embedded
8306 -- sequence of spaces to a single null character
8307 -- (this is how Link_With/Linker_Options differ)
8310 if Get_String_Char (S, F) = C then
8313 Store_String_Char (ASCII.NUL);
8316 Store_String_Char (Get_String_Char (S, F));
8324 if Present (Arg) then
8325 Store_String_Char (ASCII.NUL);
8329 Store_Linker_Option_String (End_String);
8337 -- pragma Linker_Alias (
8338 -- [Entity =>] LOCAL_NAME
8339 -- [Target =>] static_string_EXPRESSION);
8341 when Pragma_Linker_Alias =>
8343 Check_Arg_Order ((Name_Entity, Name_Target));
8344 Check_Arg_Count (2);
8345 Check_Optional_Identifier (Arg1, Name_Entity);
8346 Check_Optional_Identifier (Arg2, Name_Target);
8347 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8348 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8350 -- The only processing required is to link this item on to the
8351 -- list of rep items for the given entity. This is accomplished
8352 -- by the call to Rep_Item_Too_Late (when no error is detected
8353 -- and False is returned).
8355 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8358 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8361 ------------------------
8362 -- Linker_Constructor --
8363 ------------------------
8365 -- pragma Linker_Constructor (procedure_LOCAL_NAME);
8367 -- Code is shared with Linker_Destructor
8369 -----------------------
8370 -- Linker_Destructor --
8371 -----------------------
8373 -- pragma Linker_Destructor (procedure_LOCAL_NAME);
8375 when Pragma_Linker_Constructor |
8376 Pragma_Linker_Destructor =>
8377 Linker_Constructor : declare
8383 Check_Arg_Count (1);
8384 Check_No_Identifiers;
8385 Check_Arg_Is_Local_Name (Arg1);
8386 Arg1_X := Expression (Arg1);
8388 Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
8390 if not Is_Library_Level_Entity (Proc) then
8392 ("argument for pragma% must be library level entity", Arg1);
8395 -- The only processing required is to link this item on to the
8396 -- list of rep items for the given entity. This is accomplished
8397 -- by the call to Rep_Item_Too_Late (when no error is detected
8398 -- and False is returned).
8400 if Rep_Item_Too_Late (Proc, N) then
8403 Set_Has_Gigi_Rep_Item (Proc);
8405 end Linker_Constructor;
8407 --------------------
8408 -- Linker_Options --
8409 --------------------
8411 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
8413 when Pragma_Linker_Options => Linker_Options : declare
8417 Check_Ada_83_Warning;
8418 Check_No_Identifiers;
8419 Check_Arg_Count (1);
8420 Check_Is_In_Decl_Part_Or_Package_Spec;
8421 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8422 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
8425 while Present (Arg) loop
8426 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8427 Store_String_Char (ASCII.NUL);
8428 Store_String_Chars (Strval (Expr_Value_S (Expression (Arg))));
8432 if Operating_Mode = Generate_Code
8433 and then In_Extended_Main_Source_Unit (N)
8435 Store_Linker_Option_String (End_String);
8439 --------------------
8440 -- Linker_Section --
8441 --------------------
8443 -- pragma Linker_Section (
8444 -- [Entity =>] LOCAL_NAME
8445 -- [Section =>] static_string_EXPRESSION);
8447 when Pragma_Linker_Section =>
8449 Check_Arg_Order ((Name_Entity, Name_Section));
8450 Check_Arg_Count (2);
8451 Check_Optional_Identifier (Arg1, Name_Entity);
8452 Check_Optional_Identifier (Arg2, Name_Section);
8453 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8454 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8456 -- This pragma applies only to objects
8458 if not Is_Object (Entity (Expression (Arg1))) then
8459 Error_Pragma_Arg ("pragma% applies only to objects", Arg1);
8462 -- The only processing required is to link this item on to the
8463 -- list of rep items for the given entity. This is accomplished
8464 -- by the call to Rep_Item_Too_Late (when no error is detected
8465 -- and False is returned).
8467 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8470 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8477 -- pragma List (On | Off)
8479 -- There is nothing to do here, since we did all the processing
8480 -- for this pragma in Par.Prag (so that it works properly even in
8481 -- syntax only mode)
8486 --------------------
8487 -- Locking_Policy --
8488 --------------------
8490 -- pragma Locking_Policy (policy_IDENTIFIER);
8492 when Pragma_Locking_Policy => declare
8496 Check_Ada_83_Warning;
8497 Check_Arg_Count (1);
8498 Check_No_Identifiers;
8499 Check_Arg_Is_Locking_Policy (Arg1);
8500 Check_Valid_Configuration_Pragma;
8501 Get_Name_String (Chars (Expression (Arg1)));
8502 LP := Fold_Upper (Name_Buffer (1));
8504 if Locking_Policy /= ' '
8505 and then Locking_Policy /= LP
8507 Error_Msg_Sloc := Locking_Policy_Sloc;
8508 Error_Pragma ("locking policy incompatible with policy#");
8510 -- Set new policy, but always preserve System_Location since
8511 -- we like the error message with the run time name.
8514 Locking_Policy := LP;
8516 if Locking_Policy_Sloc /= System_Location then
8517 Locking_Policy_Sloc := Loc;
8526 -- pragma Long_Float (D_Float | G_Float);
8528 when Pragma_Long_Float =>
8530 Check_Valid_Configuration_Pragma;
8531 Check_Arg_Count (1);
8532 Check_No_Identifier (Arg1);
8533 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
8535 if not OpenVMS_On_Target then
8536 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
8541 if Chars (Expression (Arg1)) = Name_D_Float then
8542 if Opt.Float_Format_Long = 'G' then
8543 Error_Pragma ("G_Float previously specified");
8546 Opt.Float_Format_Long := 'D';
8548 -- G_Float case (this is the default, does not need overriding)
8551 if Opt.Float_Format_Long = 'D' then
8552 Error_Pragma ("D_Float previously specified");
8555 Opt.Float_Format_Long := 'G';
8558 Set_Standard_Fpt_Formats;
8560 -----------------------
8561 -- Machine_Attribute --
8562 -----------------------
8564 -- pragma Machine_Attribute (
8565 -- [Entity =>] LOCAL_NAME,
8566 -- [Attribute_Name =>] static_string_EXPRESSION
8567 -- [, [Info =>] static_string_EXPRESSION] );
8569 when Pragma_Machine_Attribute => Machine_Attribute : declare
8574 Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
8576 if Arg_Count = 3 then
8577 Check_Optional_Identifier (Arg3, Name_Info);
8578 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
8580 Check_Arg_Count (2);
8583 Check_Optional_Identifier (Arg1, Name_Entity);
8584 Check_Optional_Identifier (Arg2, Name_Attribute_Name);
8585 Check_Arg_Is_Local_Name (Arg1);
8586 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8587 Def_Id := Entity (Expression (Arg1));
8589 if Is_Access_Type (Def_Id) then
8590 Def_Id := Designated_Type (Def_Id);
8593 if Rep_Item_Too_Early (Def_Id, N) then
8597 Def_Id := Underlying_Type (Def_Id);
8599 -- The only processing required is to link this item on to the
8600 -- list of rep items for the given entity. This is accomplished
8601 -- by the call to Rep_Item_Too_Late (when no error is detected
8602 -- and False is returned).
8604 if Rep_Item_Too_Late (Def_Id, N) then
8607 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8609 end Machine_Attribute;
8616 -- (MAIN_OPTION [, MAIN_OPTION]);
8619 -- [STACK_SIZE =>] static_integer_EXPRESSION
8620 -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION
8621 -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION
8623 when Pragma_Main => Main : declare
8624 Args : Args_List (1 .. 3);
8625 Names : constant Name_List (1 .. 3) := (
8627 Name_Task_Stack_Size_Default,
8628 Name_Time_Slicing_Enabled);
8634 Gather_Associations (Names, Args);
8636 for J in 1 .. 2 loop
8637 if Present (Args (J)) then
8638 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8642 if Present (Args (3)) then
8643 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
8647 while Present (Nod) loop
8648 if Nkind (Nod) = N_Pragma
8649 and then Pragma_Name (Nod) = Name_Main
8651 Error_Msg_Name_1 := Pname;
8652 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8663 -- pragma Main_Storage
8664 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
8666 -- MAIN_STORAGE_OPTION ::=
8667 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
8668 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
8670 when Pragma_Main_Storage => Main_Storage : declare
8671 Args : Args_List (1 .. 2);
8672 Names : constant Name_List (1 .. 2) := (
8673 Name_Working_Storage,
8680 Gather_Associations (Names, Args);
8682 for J in 1 .. 2 loop
8683 if Present (Args (J)) then
8684 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8688 Check_In_Main_Program;
8691 while Present (Nod) loop
8692 if Nkind (Nod) = N_Pragma
8693 and then Pragma_Name (Nod) = Name_Main_Storage
8695 Error_Msg_Name_1 := Pname;
8696 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8707 -- pragma Memory_Size (NUMERIC_LITERAL)
8709 when Pragma_Memory_Size =>
8712 -- Memory size is simply ignored
8714 Check_No_Identifiers;
8715 Check_Arg_Count (1);
8716 Check_Arg_Is_Integer_Literal (Arg1);
8724 -- The only correct use of this pragma is on its own in a file, in
8725 -- which case it is specially processed (see Gnat1drv.Check_Bad_Body
8726 -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to
8727 -- check for a file containing nothing but a No_Body pragma). If we
8728 -- attempt to process it during normal semantics processing, it means
8729 -- it was misplaced.
8731 when Pragma_No_Body =>
8738 -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
8740 when Pragma_No_Return => No_Return : declare
8748 Check_At_Least_N_Arguments (1);
8750 -- Loop through arguments of pragma
8753 while Present (Arg) loop
8754 Check_Arg_Is_Local_Name (Arg);
8755 Id := Expression (Arg);
8758 if not Is_Entity_Name (Id) then
8759 Error_Pragma_Arg ("entity name required", Arg);
8762 if Etype (Id) = Any_Type then
8766 -- Loop to find matching procedures
8771 and then Scope (E) = Current_Scope
8773 if Ekind (E) = E_Procedure
8774 or else Ekind (E) = E_Generic_Procedure
8778 -- Set flag on any alias as well
8780 if Is_Overloadable (E) and then Present (Alias (E)) then
8781 Set_No_Return (Alias (E));
8791 Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
8798 ------------------------
8799 -- No_Strict_Aliasing --
8800 ------------------------
8802 -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
8804 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
8809 Check_At_Most_N_Arguments (1);
8811 if Arg_Count = 0 then
8812 Check_Valid_Configuration_Pragma;
8813 Opt.No_Strict_Aliasing := True;
8816 Check_Optional_Identifier (Arg2, Name_Entity);
8817 Check_Arg_Is_Local_Name (Arg1);
8818 E_Id := Entity (Expression (Arg1));
8820 if E_Id = Any_Type then
8822 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
8823 Error_Pragma_Arg ("pragma% requires access type", Arg1);
8826 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
8828 end No_Strict_Alias;
8834 -- pragma Obsolescent [(
8835 -- [Entity => NAME,]
8836 -- [(static_string_EXPRESSION [, Ada_05])];
8838 when Pragma_Obsolescent => Obsolescent : declare
8842 procedure Set_Obsolescent (E : Entity_Id);
8843 -- Given an entity Ent, mark it as obsolescent if appropriate
8845 ---------------------
8846 -- Set_Obsolescent --
8847 ---------------------
8849 procedure Set_Obsolescent (E : Entity_Id) is
8858 -- Entity name was given
8860 if Present (Ename) then
8862 -- If entity name matches, we are fine
8864 if Chars (Ename) = Chars (Ent) then
8867 -- If entity name does not match, only possibility is an
8868 -- enumeration literal from an enumeration type declaration.
8870 elsif Ekind (Ent) /= E_Enumeration_Type then
8872 ("pragma % entity name does not match declaration");
8875 Ent := First_Literal (E);
8879 ("pragma % entity name does not match any " &
8880 "enumeration literal");
8882 elsif Chars (Ent) = Chars (Ename) then
8886 Ent := Next_Literal (Ent);
8892 -- Ent points to entity to be marked
8894 if Arg_Count >= 1 then
8896 -- Deal with static string argument
8898 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8899 S := Strval (Expression (Arg1));
8901 for J in 1 .. String_Length (S) loop
8902 if not In_Character_Range (Get_String_Char (S, J)) then
8904 ("pragma% argument does not allow wide characters",
8909 Obsolescent_Warnings.Append
8910 ((Ent => Ent, Msg => Strval (Expression (Arg1))));
8912 -- Check for Ada_05 parameter
8914 if Arg_Count /= 1 then
8915 Check_Arg_Count (2);
8918 Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
8921 Check_Arg_Is_Identifier (Argx);
8923 if Chars (Argx) /= Name_Ada_05 then
8924 Error_Msg_Name_2 := Name_Ada_05;
8926 ("only allowed argument for pragma% is %", Argx);
8929 if Ada_Version_Explicit < Ada_05
8930 or else not Warn_On_Ada_2005_Compatibility
8938 -- Set flag if pragma active
8941 Set_Is_Obsolescent (Ent);
8945 end Set_Obsolescent;
8947 -- Start of processing for pragma Obsolescent
8952 Check_At_Most_N_Arguments (3);
8954 -- See if first argument specifies an entity name
8957 and then Chars (Arg1) = Name_Entity
8959 Ename := Get_Pragma_Arg (Arg1);
8961 if Nkind (Ename) /= N_Character_Literal
8963 Nkind (Ename) /= N_Identifier
8965 Nkind (Ename) /= N_Operator_Symbol
8967 Error_Pragma_Arg ("entity name expected for pragma%", Arg1);
8970 -- Eliminate first argument, so we can share processing
8974 Arg_Count := Arg_Count - 1;
8976 -- No Entity name argument given
8982 Check_No_Identifiers;
8984 -- Get immediately preceding declaration
8987 while Present (Decl) and then Nkind (Decl) = N_Pragma loop
8991 -- Cases where we do not follow anything other than another pragma
8995 -- First case: library level compilation unit declaration with
8996 -- the pragma immediately following the declaration.
8998 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
9000 (Defining_Entity (Unit (Parent (Parent (N)))));
9003 -- Case 2: library unit placement for package
9007 Ent : constant Entity_Id := Find_Lib_Unit_Name;
9009 if Ekind (Ent) = E_Package
9010 or else Ekind (Ent) = E_Generic_Package
9012 Set_Obsolescent (Ent);
9018 -- Cases where we must follow a declaration
9021 if Nkind (Decl) not in N_Declaration
9022 and then Nkind (Decl) not in N_Later_Decl_Item
9023 and then Nkind (Decl) not in N_Generic_Declaration
9026 ("pragma% misplaced, " &
9027 "must immediately follow a declaration");
9030 Set_Obsolescent (Defining_Entity (Decl));
9040 -- pragma No_Run_Time
9042 -- Note: this pragma is retained for backwards compatibility.
9043 -- See body of Rtsfind for full details on its handling.
9045 when Pragma_No_Run_Time =>
9047 Check_Valid_Configuration_Pragma;
9048 Check_Arg_Count (0);
9050 No_Run_Time_Mode := True;
9051 Configurable_Run_Time_Mode := True;
9053 -- Set Duration to 32 bits if word size is 32
9055 if Ttypes.System_Word_Size = 32 then
9056 Duration_32_Bits_On_Target := True;
9059 -- Set appropriate restrictions
9061 Set_Restriction (No_Finalization, N);
9062 Set_Restriction (No_Exception_Handlers, N);
9063 Set_Restriction (Max_Tasks, N, 0);
9064 Set_Restriction (No_Tasking, N);
9066 -----------------------
9067 -- Normalize_Scalars --
9068 -----------------------
9070 -- pragma Normalize_Scalars;
9072 when Pragma_Normalize_Scalars =>
9073 Check_Ada_83_Warning;
9074 Check_Arg_Count (0);
9075 Check_Valid_Configuration_Pragma;
9076 Normalize_Scalars := True;
9077 Init_Or_Norm_Scalars := True;
9083 -- pragma Optimize (Time | Space | Off);
9085 -- The actual check for optimize is done in Gigi. Note that this
9086 -- pragma does not actually change the optimization setting, it
9087 -- simply checks that it is consistent with the pragma.
9089 when Pragma_Optimize =>
9090 Check_No_Identifiers;
9091 Check_Arg_Count (1);
9092 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
9094 ------------------------
9095 -- Optimize_Alignment --
9096 ------------------------
9098 -- pragma Optimize_Alignment (Time | Space | Off);
9100 when Pragma_Optimize_Alignment =>
9102 Check_No_Identifiers;
9103 Check_Arg_Count (1);
9104 Check_Valid_Configuration_Pragma;
9107 Nam : constant Name_Id := Chars (Get_Pragma_Arg (Arg1));
9111 Opt.Optimize_Alignment := 'T';
9113 Opt.Optimize_Alignment := 'S';
9115 Opt.Optimize_Alignment := 'O';
9117 Error_Pragma_Arg ("invalid argument for pragma%", Arg1);
9121 -- Set indication that mode is set locally. If we are in fact in a
9122 -- configuration pragma file, this setting is harmless since the
9123 -- switch will get reset anyway at the start of each unit.
9125 Optimize_Alignment_Local := True;
9131 -- pragma Pack (first_subtype_LOCAL_NAME);
9133 when Pragma_Pack => Pack : declare
9134 Assoc : constant Node_Id := Arg1;
9139 Check_No_Identifiers;
9140 Check_Arg_Count (1);
9141 Check_Arg_Is_Local_Name (Arg1);
9143 Type_Id := Expression (Assoc);
9144 Find_Type (Type_Id);
9145 Typ := Entity (Type_Id);
9148 or else Rep_Item_Too_Early (Typ, N)
9152 Typ := Underlying_Type (Typ);
9155 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
9156 Error_Pragma ("pragma% must specify array or record type");
9159 Check_First_Subtype (Arg1);
9161 if Has_Pragma_Pack (Typ) then
9162 Error_Pragma ("duplicate pragma%, only one allowed");
9166 elsif Is_Array_Type (Typ) then
9168 -- Pack not allowed for aliased or atomic components
9170 if Has_Aliased_Components (Base_Type (Typ)) then
9172 ("pragma% ignored, cannot pack aliased components?");
9174 elsif Has_Atomic_Components (Typ)
9175 or else Is_Atomic (Component_Type (Typ))
9178 ("?pragma% ignored, cannot pack atomic components");
9181 -- If we had an explicit component size given, then we do not
9182 -- let Pack override this given size. We also give a warning
9183 -- that Pack is being ignored unless we can tell for sure that
9184 -- the Pack would not have had any effect anyway.
9186 if Has_Component_Size_Clause (Typ) then
9187 if Known_Static_RM_Size (Component_Type (Typ))
9189 RM_Size (Component_Type (Typ)) = Component_Size (Typ)
9194 ("?pragma% ignored, explicit component size given");
9197 -- If no prior array component size given, Pack is effective
9200 if not Rep_Item_Too_Late (Typ, N) then
9201 if VM_Target = No_VM then
9202 Set_Is_Packed (Base_Type (Typ));
9203 elsif not GNAT_Mode then
9205 ("?pragma% ignored in this configuration");
9208 Set_Has_Pragma_Pack (Base_Type (Typ));
9209 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9213 -- For record types, the pack is always effective
9215 else pragma Assert (Is_Record_Type (Typ));
9216 if not Rep_Item_Too_Late (Typ, N) then
9217 if VM_Target = No_VM then
9218 Set_Is_Packed (Base_Type (Typ));
9219 elsif not GNAT_Mode then
9220 Error_Pragma ("?pragma% ignored in this configuration");
9223 Set_Has_Pragma_Pack (Base_Type (Typ));
9224 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9235 -- There is nothing to do here, since we did all the processing
9236 -- for this pragma in Par.Prag (so that it works properly even in
9237 -- syntax only mode)
9246 -- pragma Passive [(PASSIVE_FORM)];
9248 -- PASSIVE_FORM ::= Semaphore | No
9250 when Pragma_Passive =>
9253 if Nkind (Parent (N)) /= N_Task_Definition then
9254 Error_Pragma ("pragma% must be within task definition");
9257 if Arg_Count /= 0 then
9258 Check_Arg_Count (1);
9259 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
9262 ----------------------------------
9263 -- Preelaborable_Initialization --
9264 ----------------------------------
9266 -- pragma Preelaborable_Initialization (DIRECT_NAME);
9268 when Pragma_Preelaborable_Initialization => Preelab_Init : declare
9273 Check_Arg_Count (1);
9274 Check_No_Identifiers;
9275 Check_Arg_Is_Identifier (Arg1);
9276 Check_Arg_Is_Local_Name (Arg1);
9277 Check_First_Subtype (Arg1);
9278 Ent := Entity (Expression (Arg1));
9280 if not Is_Private_Type (Ent)
9281 and then not Is_Protected_Type (Ent)
9284 ("pragma % can only be applied to private or protected type",
9288 -- Give an error if the pragma is applied to a protected type that
9289 -- does not qualify (due to having entries, or due to components
9290 -- that do not qualify).
9292 if Is_Protected_Type (Ent)
9293 and then not Has_Preelaborable_Initialization (Ent)
9296 ("protected type & does not have preelaborable " &
9297 "initialization", Ent);
9299 -- Otherwise mark the type as definitely having preelaborable
9303 Set_Known_To_Have_Preelab_Init (Ent);
9306 if Has_Pragma_Preelab_Init (Ent)
9307 and then Warn_On_Redundant_Constructs
9309 Error_Pragma ("?duplicate pragma%!");
9311 Set_Has_Pragma_Preelab_Init (Ent);
9319 -- pragma Polling (ON | OFF);
9321 when Pragma_Polling =>
9323 Check_Arg_Count (1);
9324 Check_No_Identifiers;
9325 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9326 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
9328 --------------------
9329 -- Persistent_BSS --
9330 --------------------
9332 when Pragma_Persistent_BSS => Persistent_BSS : declare
9339 Check_At_Most_N_Arguments (1);
9341 -- Case of application to specific object (one argument)
9343 if Arg_Count = 1 then
9344 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9346 if not Is_Entity_Name (Expression (Arg1))
9348 (Ekind (Entity (Expression (Arg1))) /= E_Variable
9349 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
9351 Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
9354 Ent := Entity (Expression (Arg1));
9355 Decl := Parent (Ent);
9357 if Rep_Item_Too_Late (Ent, N) then
9361 if Present (Expression (Decl)) then
9363 ("object for pragma% cannot have initialization", Arg1);
9366 if not Is_Potentially_Persistent_Type (Etype (Ent)) then
9368 ("object type for pragma% is not potentially persistent",
9373 Make_Linker_Section_Pragma
9374 (Ent, Sloc (N), ".persistent.bss");
9375 Insert_After (N, Prag);
9378 -- Case of use as configuration pragma with no arguments
9381 Check_Valid_Configuration_Pragma;
9382 Persistent_BSS_Mode := True;
9390 -- pragma Postcondition ([Check =>] Boolean_Expression
9391 -- [,[Message =>] String_Expression]);
9393 when Pragma_Postcondition => Postcondition : declare
9395 pragma Warnings (Off, In_Body);
9399 Check_At_Least_N_Arguments (1);
9400 Check_At_Most_N_Arguments (2);
9401 Check_Optional_Identifier (Arg1, Name_Check);
9403 -- All we need to do here is call the common check procedure,
9404 -- the remainder of the processing is found in Sem_Ch6/Sem_Ch7.
9406 Check_Precondition_Postcondition (In_Body);
9413 -- pragma Precondition ([Check =>] Boolean_Expression
9414 -- [,[Message =>] String_Expression]);
9416 when Pragma_Precondition => Precondition : declare
9421 Check_At_Least_N_Arguments (1);
9422 Check_At_Most_N_Arguments (2);
9423 Check_Optional_Identifier (Arg1, Name_Check);
9425 Check_Precondition_Postcondition (In_Body);
9427 -- If in spec, nothing to do. If in body, then we convert the
9428 -- pragma to pragma Check (Precondition, cond [, msg]). Note we
9429 -- do this whether or not precondition checks are enabled. That
9430 -- works fine since pragma Check will do this check.
9433 if Arg_Count = 2 then
9434 Check_Optional_Identifier (Arg3, Name_Message);
9435 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
9438 Analyze_And_Resolve (Get_Pragma_Arg (Arg1), Standard_Boolean);
9442 Chars => Name_Check,
9443 Pragma_Argument_Associations => New_List (
9444 Make_Pragma_Argument_Association (Loc,
9446 Make_Identifier (Loc,
9447 Chars => Name_Precondition)),
9449 Make_Pragma_Argument_Association (Sloc (Arg1),
9450 Expression => Relocate_Node (Get_Pragma_Arg (Arg1))))));
9452 if Arg_Count = 2 then
9453 Append_To (Pragma_Argument_Associations (N),
9454 Make_Pragma_Argument_Association (Sloc (Arg2),
9455 Expression => Relocate_Node (Get_Pragma_Arg (Arg2))));
9466 -- pragma Preelaborate [(library_unit_NAME)];
9468 -- Set the flag Is_Preelaborated of program unit name entity
9470 when Pragma_Preelaborate => Preelaborate : declare
9471 Pa : constant Node_Id := Parent (N);
9472 Pk : constant Node_Kind := Nkind (Pa);
9476 Check_Ada_83_Warning;
9477 Check_Valid_Library_Unit_Pragma;
9479 if Nkind (N) = N_Null_Statement then
9483 Ent := Find_Lib_Unit_Name;
9485 -- This filters out pragmas inside generic parent then
9486 -- show up inside instantiation
9489 and then not (Pk = N_Package_Specification
9490 and then Present (Generic_Parent (Pa)))
9492 if not Debug_Flag_U then
9493 Set_Is_Preelaborated (Ent);
9494 Set_Suppress_Elaboration_Warnings (Ent);
9499 ---------------------
9500 -- Preelaborate_05 --
9501 ---------------------
9503 -- pragma Preelaborate_05 [(library_unit_NAME)];
9505 -- This pragma is useable only in GNAT_Mode, where it is used like
9506 -- pragma Preelaborate but it is only effective in Ada 2005 mode
9507 -- (otherwise it is ignored). This is used to implement AI-362 which
9508 -- recategorizes some run-time packages in Ada 2005 mode.
9510 when Pragma_Preelaborate_05 => Preelaborate_05 : declare
9515 Check_Valid_Library_Unit_Pragma;
9517 if not GNAT_Mode then
9518 Error_Pragma ("pragma% only available in GNAT mode");
9521 if Nkind (N) = N_Null_Statement then
9525 -- This is one of the few cases where we need to test the value of
9526 -- Ada_Version_Explicit rather than Ada_Version (which is always
9527 -- set to Ada_05 in a predefined unit), we need to know the
9528 -- explicit version set to know if this pragma is active.
9530 if Ada_Version_Explicit >= Ada_05 then
9531 Ent := Find_Lib_Unit_Name;
9532 Set_Is_Preelaborated (Ent);
9533 Set_Suppress_Elaboration_Warnings (Ent);
9535 end Preelaborate_05;
9541 -- pragma Priority (EXPRESSION);
9543 when Pragma_Priority => Priority : declare
9544 P : constant Node_Id := Parent (N);
9548 Check_No_Identifiers;
9549 Check_Arg_Count (1);
9553 if Nkind (P) = N_Subprogram_Body then
9554 Check_In_Main_Program;
9556 Arg := Expression (Arg1);
9557 Analyze_And_Resolve (Arg, Standard_Integer);
9561 if not Is_Static_Expression (Arg) then
9562 Flag_Non_Static_Expr
9563 ("main subprogram priority is not static!", Arg);
9566 -- If constraint error, then we already signalled an error
9568 elsif Raises_Constraint_Error (Arg) then
9571 -- Otherwise check in range
9575 Val : constant Uint := Expr_Value (Arg);
9579 or else Val > Expr_Value (Expression
9580 (Parent (RTE (RE_Max_Priority))))
9583 ("main subprogram priority is out of range", Arg1);
9589 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
9591 -- Load an arbitrary entity from System.Tasking to make sure
9592 -- this package is implicitly with'ed, since we need to have
9593 -- the tasking run-time active for the pragma Priority to have
9597 Discard : Entity_Id;
9598 pragma Warnings (Off, Discard);
9600 Discard := RTE (RE_Task_List);
9603 -- Task or Protected, must be of type Integer
9605 elsif Nkind (P) = N_Protected_Definition
9607 Nkind (P) = N_Task_Definition
9609 Arg := Expression (Arg1);
9611 -- The expression must be analyzed in the special manner
9612 -- described in "Handling of Default and Per-Object
9613 -- Expressions" in sem.ads.
9615 Preanalyze_Spec_Expression (Arg, Standard_Integer);
9617 if not Is_Static_Expression (Arg) then
9618 Check_Restriction (Static_Priorities, Arg);
9621 -- Anything else is incorrect
9627 if Has_Priority_Pragma (P) then
9628 Error_Pragma ("duplicate pragma% not allowed");
9630 Set_Has_Priority_Pragma (P, True);
9632 if Nkind (P) = N_Protected_Definition
9634 Nkind (P) = N_Task_Definition
9636 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9637 -- exp_ch9 should use this ???
9642 -----------------------------------
9643 -- Priority_Specific_Dispatching --
9644 -----------------------------------
9646 -- pragma Priority_Specific_Dispatching (
9647 -- policy_IDENTIFIER,
9648 -- first_priority_EXPRESSION,
9649 -- last_priority_EXPRESSION);
9651 when Pragma_Priority_Specific_Dispatching =>
9652 Priority_Specific_Dispatching : declare
9653 Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
9654 -- This is the entity System.Any_Priority;
9657 Lower_Bound : Node_Id;
9658 Upper_Bound : Node_Id;
9664 Check_Arg_Count (3);
9665 Check_No_Identifiers;
9666 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9667 Check_Valid_Configuration_Pragma;
9668 Get_Name_String (Chars (Expression (Arg1)));
9669 DP := Fold_Upper (Name_Buffer (1));
9671 Lower_Bound := Expression (Arg2);
9672 Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
9673 Lower_Val := Expr_Value (Lower_Bound);
9675 Upper_Bound := Expression (Arg3);
9676 Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
9677 Upper_Val := Expr_Value (Upper_Bound);
9679 -- It is not allowed to use Task_Dispatching_Policy and
9680 -- Priority_Specific_Dispatching in the same partition.
9682 if Task_Dispatching_Policy /= ' ' then
9683 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9685 ("pragma% incompatible with Task_Dispatching_Policy#");
9687 -- Check lower bound in range
9689 elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9691 Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
9694 ("first_priority is out of range", Arg2);
9696 -- Check upper bound in range
9698 elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9700 Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
9703 ("last_priority is out of range", Arg3);
9705 -- Check that the priority range is valid
9707 elsif Lower_Val > Upper_Val then
9709 ("last_priority_expression must be greater than" &
9710 " or equal to first_priority_expression");
9712 -- Store the new policy, but always preserve System_Location since
9713 -- we like the error message with the run-time name.
9716 -- Check overlapping in the priority ranges specified in other
9717 -- Priority_Specific_Dispatching pragmas within the same
9718 -- partition. We can only check those we know about!
9721 Specific_Dispatching.First .. Specific_Dispatching.Last
9723 if Specific_Dispatching.Table (J).First_Priority in
9724 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9725 or else Specific_Dispatching.Table (J).Last_Priority in
9726 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9729 Specific_Dispatching.Table (J).Pragma_Loc;
9731 ("priority range overlaps with "
9732 & "Priority_Specific_Dispatching#");
9736 -- The use of Priority_Specific_Dispatching is incompatible
9737 -- with Task_Dispatching_Policy.
9739 if Task_Dispatching_Policy /= ' ' then
9740 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9742 ("Priority_Specific_Dispatching incompatible "
9743 & "with Task_Dispatching_Policy#");
9746 -- The use of Priority_Specific_Dispatching forces ceiling
9749 if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
9750 Error_Msg_Sloc := Locking_Policy_Sloc;
9752 ("Priority_Specific_Dispatching incompatible "
9753 & "with Locking_Policy#");
9755 -- Set the Ceiling_Locking policy, but preserve System_Location
9756 -- since we like the error message with the run time name.
9759 Locking_Policy := 'C';
9761 if Locking_Policy_Sloc /= System_Location then
9762 Locking_Policy_Sloc := Loc;
9766 -- Add entry in the table
9768 Specific_Dispatching.Append
9769 ((Dispatching_Policy => DP,
9770 First_Priority => UI_To_Int (Lower_Val),
9771 Last_Priority => UI_To_Int (Upper_Val),
9772 Pragma_Loc => Loc));
9774 end Priority_Specific_Dispatching;
9780 -- pragma Profile (profile_IDENTIFIER);
9782 -- profile_IDENTIFIER => Restricted | Ravenscar
9784 when Pragma_Profile =>
9786 Check_Arg_Count (1);
9787 Check_Valid_Configuration_Pragma;
9788 Check_No_Identifiers;
9791 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9793 if Chars (Argx) = Name_Ravenscar then
9794 Set_Ravenscar_Profile (N);
9795 elsif Chars (Argx) = Name_Restricted then
9796 Set_Profile_Restrictions
9797 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
9799 Error_Pragma_Arg ("& is not a valid profile", Argx);
9803 ----------------------
9804 -- Profile_Warnings --
9805 ----------------------
9807 -- pragma Profile_Warnings (profile_IDENTIFIER);
9809 -- profile_IDENTIFIER => Restricted | Ravenscar
9811 when Pragma_Profile_Warnings =>
9813 Check_Arg_Count (1);
9814 Check_Valid_Configuration_Pragma;
9815 Check_No_Identifiers;
9818 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9820 if Chars (Argx) = Name_Ravenscar then
9821 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
9822 elsif Chars (Argx) = Name_Restricted then
9823 Set_Profile_Restrictions (Restricted, N, Warn => True);
9825 Error_Pragma_Arg ("& is not a valid profile", Argx);
9829 --------------------------
9830 -- Propagate_Exceptions --
9831 --------------------------
9833 -- pragma Propagate_Exceptions;
9835 -- Note: this pragma is obsolete and has no effect
9837 when Pragma_Propagate_Exceptions =>
9839 Check_Arg_Count (0);
9841 if In_Extended_Main_Source_Unit (N) then
9842 Propagate_Exceptions := True;
9849 -- pragma Psect_Object (
9850 -- [Internal =>] LOCAL_NAME,
9851 -- [, [External =>] EXTERNAL_SYMBOL]
9852 -- [, [Size =>] EXTERNAL_SYMBOL]);
9854 when Pragma_Psect_Object | Pragma_Common_Object =>
9855 Psect_Object : declare
9856 Args : Args_List (1 .. 3);
9857 Names : constant Name_List (1 .. 3) := (
9862 Internal : Node_Id renames Args (1);
9863 External : Node_Id renames Args (2);
9864 Size : Node_Id renames Args (3);
9868 procedure Check_Too_Long (Arg : Node_Id);
9869 -- Posts message if the argument is an identifier with more
9870 -- than 31 characters, or a string literal with more than
9871 -- 31 characters, and we are operating under VMS
9873 --------------------
9874 -- Check_Too_Long --
9875 --------------------
9877 procedure Check_Too_Long (Arg : Node_Id) is
9878 X : constant Node_Id := Original_Node (Arg);
9881 if Nkind (X) /= N_String_Literal
9883 Nkind (X) /= N_Identifier
9886 ("inappropriate argument for pragma %", Arg);
9889 if OpenVMS_On_Target then
9890 if (Nkind (X) = N_String_Literal
9891 and then String_Length (Strval (X)) > 31)
9893 (Nkind (X) = N_Identifier
9894 and then Length_Of_Name (Chars (X)) > 31)
9897 ("argument for pragma % is longer than 31 characters",
9903 -- Start of processing for Common_Object/Psect_Object
9907 Gather_Associations (Names, Args);
9908 Process_Extended_Import_Export_Internal_Arg (Internal);
9910 Def_Id := Entity (Internal);
9912 if Ekind (Def_Id) /= E_Constant
9913 and then Ekind (Def_Id) /= E_Variable
9916 ("pragma% must designate an object", Internal);
9919 Check_Too_Long (Internal);
9921 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
9923 ("cannot use pragma% for imported/exported object",
9927 if Is_Concurrent_Type (Etype (Internal)) then
9929 ("cannot specify pragma % for task/protected object",
9933 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
9935 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
9937 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
9940 if Ekind (Def_Id) = E_Constant then
9942 ("cannot specify pragma % for a constant", Internal);
9945 if Is_Record_Type (Etype (Internal)) then
9951 Ent := First_Entity (Etype (Internal));
9952 while Present (Ent) loop
9953 Decl := Declaration_Node (Ent);
9955 if Ekind (Ent) = E_Component
9956 and then Nkind (Decl) = N_Component_Declaration
9957 and then Present (Expression (Decl))
9958 and then Warn_On_Export_Import
9961 ("?object for pragma % has defaults", Internal);
9971 if Present (Size) then
9972 Check_Too_Long (Size);
9975 if Present (External) then
9976 Check_Arg_Is_External_Name (External);
9977 Check_Too_Long (External);
9980 -- If all error tests pass, link pragma on to the rep item chain
9982 Record_Rep_Item (Def_Id, N);
9989 -- pragma Pure [(library_unit_NAME)];
9991 when Pragma_Pure => Pure : declare
9995 Check_Ada_83_Warning;
9996 Check_Valid_Library_Unit_Pragma;
9998 if Nkind (N) = N_Null_Statement then
10002 Ent := Find_Lib_Unit_Name;
10004 Set_Has_Pragma_Pure (Ent);
10005 Set_Suppress_Elaboration_Warnings (Ent);
10012 -- pragma Pure_05 [(library_unit_NAME)];
10014 -- This pragma is useable only in GNAT_Mode, where it is used like
10015 -- pragma Pure but it is only effective in Ada 2005 mode (otherwise
10016 -- it is ignored). It may be used after a pragma Preelaborate, in
10017 -- which case it overrides the effect of the pragma Preelaborate.
10018 -- This is used to implement AI-362 which recategorizes some run-time
10019 -- packages in Ada 2005 mode.
10021 when Pragma_Pure_05 => Pure_05 : declare
10026 Check_Valid_Library_Unit_Pragma;
10028 if not GNAT_Mode then
10029 Error_Pragma ("pragma% only available in GNAT mode");
10031 if Nkind (N) = N_Null_Statement then
10035 -- This is one of the few cases where we need to test the value of
10036 -- Ada_Version_Explicit rather than Ada_Version (which is always
10037 -- set to Ada_05 in a predefined unit), we need to know the
10038 -- explicit version set to know if this pragma is active.
10040 if Ada_Version_Explicit >= Ada_05 then
10041 Ent := Find_Lib_Unit_Name;
10042 Set_Is_Preelaborated (Ent, False);
10044 Set_Suppress_Elaboration_Warnings (Ent);
10048 -------------------
10049 -- Pure_Function --
10050 -------------------
10052 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
10054 when Pragma_Pure_Function => Pure_Function : declare
10057 Def_Id : Entity_Id;
10058 Effective : Boolean := False;
10062 Check_Arg_Count (1);
10063 Check_Optional_Identifier (Arg1, Name_Entity);
10064 Check_Arg_Is_Local_Name (Arg1);
10065 E_Id := Expression (Arg1);
10067 if Error_Posted (E_Id) then
10071 -- Loop through homonyms (overloadings) of referenced entity
10073 E := Entity (E_Id);
10075 if Present (E) then
10077 Def_Id := Get_Base_Subprogram (E);
10079 if Ekind (Def_Id) /= E_Function
10080 and then Ekind (Def_Id) /= E_Generic_Function
10081 and then Ekind (Def_Id) /= E_Operator
10084 ("pragma% requires a function name", Arg1);
10087 Set_Is_Pure (Def_Id);
10089 if not Has_Pragma_Pure_Function (Def_Id) then
10090 Set_Has_Pragma_Pure_Function (Def_Id);
10095 exit when No (E) or else Scope (E) /= Current_Scope;
10099 and then Warn_On_Redundant_Constructs
10101 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
10107 --------------------
10108 -- Queuing_Policy --
10109 --------------------
10111 -- pragma Queuing_Policy (policy_IDENTIFIER);
10113 when Pragma_Queuing_Policy => declare
10117 Check_Ada_83_Warning;
10118 Check_Arg_Count (1);
10119 Check_No_Identifiers;
10120 Check_Arg_Is_Queuing_Policy (Arg1);
10121 Check_Valid_Configuration_Pragma;
10122 Get_Name_String (Chars (Expression (Arg1)));
10123 QP := Fold_Upper (Name_Buffer (1));
10125 if Queuing_Policy /= ' '
10126 and then Queuing_Policy /= QP
10128 Error_Msg_Sloc := Queuing_Policy_Sloc;
10129 Error_Pragma ("queuing policy incompatible with policy#");
10131 -- Set new policy, but always preserve System_Location since
10132 -- we like the error message with the run time name.
10135 Queuing_Policy := QP;
10137 if Queuing_Policy_Sloc /= System_Location then
10138 Queuing_Policy_Sloc := Loc;
10143 -----------------------
10144 -- Relative_Deadline --
10145 -----------------------
10147 -- pragma Relative_Deadline (time_span_EXPRESSION);
10149 when Pragma_Relative_Deadline => Relative_Deadline : declare
10150 P : constant Node_Id := Parent (N);
10155 Check_No_Identifiers;
10156 Check_Arg_Count (1);
10158 Arg := Expression (Arg1);
10160 -- The expression must be analyzed in the special manner described
10161 -- in "Handling of Default and Per-Object Expressions" in sem.ads.
10163 Preanalyze_Spec_Expression (Arg, RTE (RE_Time_Span));
10167 if Nkind (P) = N_Subprogram_Body then
10168 Check_In_Main_Program;
10172 elsif Nkind (P) = N_Task_Definition then
10175 -- Anything else is incorrect
10181 if Has_Relative_Deadline_Pragma (P) then
10182 Error_Pragma ("duplicate pragma% not allowed");
10184 Set_Has_Relative_Deadline_Pragma (P, True);
10186 if Nkind (P) = N_Task_Definition then
10187 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10190 end Relative_Deadline;
10192 ---------------------------
10193 -- Remote_Call_Interface --
10194 ---------------------------
10196 -- pragma Remote_Call_Interface [(library_unit_NAME)];
10198 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
10199 Cunit_Node : Node_Id;
10200 Cunit_Ent : Entity_Id;
10204 Check_Ada_83_Warning;
10205 Check_Valid_Library_Unit_Pragma;
10207 if Nkind (N) = N_Null_Statement then
10211 Cunit_Node := Cunit (Current_Sem_Unit);
10212 K := Nkind (Unit (Cunit_Node));
10213 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10215 if K = N_Package_Declaration
10216 or else K = N_Generic_Package_Declaration
10217 or else K = N_Subprogram_Declaration
10218 or else K = N_Generic_Subprogram_Declaration
10219 or else (K = N_Subprogram_Body
10220 and then Acts_As_Spec (Unit (Cunit_Node)))
10225 "pragma% must apply to package or subprogram declaration");
10228 Set_Is_Remote_Call_Interface (Cunit_Ent);
10229 end Remote_Call_Interface;
10235 -- pragma Remote_Types [(library_unit_NAME)];
10237 when Pragma_Remote_Types => Remote_Types : declare
10238 Cunit_Node : Node_Id;
10239 Cunit_Ent : Entity_Id;
10242 Check_Ada_83_Warning;
10243 Check_Valid_Library_Unit_Pragma;
10245 if Nkind (N) = N_Null_Statement then
10249 Cunit_Node := Cunit (Current_Sem_Unit);
10250 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10252 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
10254 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
10257 "pragma% can only apply to a package declaration");
10260 Set_Is_Remote_Types (Cunit_Ent);
10267 -- pragma Ravenscar;
10269 when Pragma_Ravenscar =>
10271 Check_Arg_Count (0);
10272 Check_Valid_Configuration_Pragma;
10273 Set_Ravenscar_Profile (N);
10275 if Warn_On_Obsolescent_Feature then
10277 ("pragma Ravenscar is an obsolescent feature?", N);
10279 ("|use pragma Profile (Ravenscar) instead", N);
10282 -------------------------
10283 -- Restricted_Run_Time --
10284 -------------------------
10286 -- pragma Restricted_Run_Time;
10288 when Pragma_Restricted_Run_Time =>
10290 Check_Arg_Count (0);
10291 Check_Valid_Configuration_Pragma;
10292 Set_Profile_Restrictions
10293 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
10295 if Warn_On_Obsolescent_Feature then
10297 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
10299 ("|use pragma Profile (Restricted) instead", N);
10306 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
10309 -- restriction_IDENTIFIER
10310 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10312 when Pragma_Restrictions =>
10313 Process_Restrictions_Or_Restriction_Warnings
10314 (Warn => Treat_Restrictions_As_Warnings);
10316 --------------------------
10317 -- Restriction_Warnings --
10318 --------------------------
10320 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
10323 -- restriction_IDENTIFIER
10324 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10326 when Pragma_Restriction_Warnings =>
10328 Process_Restrictions_Or_Restriction_Warnings (Warn => True);
10334 -- pragma Reviewable;
10336 when Pragma_Reviewable =>
10337 Check_Ada_83_Warning;
10338 Check_Arg_Count (0);
10341 -------------------
10342 -- Share_Generic --
10343 -------------------
10345 -- pragma Share_Generic (NAME {, NAME});
10347 when Pragma_Share_Generic =>
10349 Process_Generic_List;
10355 -- pragma Shared (LOCAL_NAME);
10357 when Pragma_Shared =>
10359 Process_Atomic_Shared_Volatile;
10361 --------------------
10362 -- Shared_Passive --
10363 --------------------
10365 -- pragma Shared_Passive [(library_unit_NAME)];
10367 -- Set the flag Is_Shared_Passive of program unit name entity
10369 when Pragma_Shared_Passive => Shared_Passive : declare
10370 Cunit_Node : Node_Id;
10371 Cunit_Ent : Entity_Id;
10374 Check_Ada_83_Warning;
10375 Check_Valid_Library_Unit_Pragma;
10377 if Nkind (N) = N_Null_Statement then
10381 Cunit_Node := Cunit (Current_Sem_Unit);
10382 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10384 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
10386 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
10389 "pragma% can only apply to a package declaration");
10392 Set_Is_Shared_Passive (Cunit_Ent);
10393 end Shared_Passive;
10395 ----------------------
10396 -- Source_File_Name --
10397 ----------------------
10399 -- There are five forms for this pragma:
10401 -- pragma Source_File_Name (
10402 -- [UNIT_NAME =>] unit_NAME,
10403 -- BODY_FILE_NAME => STRING_LITERAL
10404 -- [, [INDEX =>] INTEGER_LITERAL]);
10406 -- pragma Source_File_Name (
10407 -- [UNIT_NAME =>] unit_NAME,
10408 -- SPEC_FILE_NAME => STRING_LITERAL
10409 -- [, [INDEX =>] INTEGER_LITERAL]);
10411 -- pragma Source_File_Name (
10412 -- BODY_FILE_NAME => STRING_LITERAL
10413 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10414 -- [, CASING => CASING_SPEC]);
10416 -- pragma Source_File_Name (
10417 -- SPEC_FILE_NAME => STRING_LITERAL
10418 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10419 -- [, CASING => CASING_SPEC]);
10421 -- pragma Source_File_Name (
10422 -- SUBUNIT_FILE_NAME => STRING_LITERAL
10423 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10424 -- [, CASING => CASING_SPEC]);
10426 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
10428 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
10429 -- Source_File_Name (SFN), however their usage is exclusive:
10430 -- SFN can only be used when no project file is used, while
10431 -- SFNP can only be used when a project file is used.
10433 -- No processing here. Processing was completed during parsing,
10434 -- since we need to have file names set as early as possible.
10435 -- Units are loaded well before semantic processing starts.
10437 -- The only processing we defer to this point is the check
10438 -- for correct placement.
10440 when Pragma_Source_File_Name =>
10442 Check_Valid_Configuration_Pragma;
10444 ------------------------------
10445 -- Source_File_Name_Project --
10446 ------------------------------
10448 -- See Source_File_Name for syntax
10450 -- No processing here. Processing was completed during parsing,
10451 -- since we need to have file names set as early as possible.
10452 -- Units are loaded well before semantic processing starts.
10454 -- The only processing we defer to this point is the check
10455 -- for correct placement.
10457 when Pragma_Source_File_Name_Project =>
10459 Check_Valid_Configuration_Pragma;
10461 -- Check that a pragma Source_File_Name_Project is used only
10462 -- in a configuration pragmas file.
10464 -- Pragmas Source_File_Name_Project should only be generated
10465 -- by the Project Manager in configuration pragmas files.
10467 -- This is really an ugly test. It seems to depend on some
10468 -- accidental and undocumented property. At the very least
10469 -- it needs to be documented, but it would be better to have
10470 -- a clean way of testing if we are in a configuration file???
10472 if Present (Parent (N)) then
10474 ("pragma% can only appear in a configuration pragmas file");
10477 ----------------------
10478 -- Source_Reference --
10479 ----------------------
10481 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
10483 -- Nothing to do, all processing completed in Par.Prag, since we
10484 -- need the information for possible parser messages that are output
10486 when Pragma_Source_Reference =>
10489 --------------------------------
10490 -- Static_Elaboration_Desired --
10491 --------------------------------
10493 -- pragma Static_Elaboration_Desired (DIRECT_NAME);
10495 when Pragma_Static_Elaboration_Desired =>
10497 Check_At_Most_N_Arguments (1);
10499 if Is_Compilation_Unit (Current_Scope)
10500 and then Ekind (Current_Scope) = E_Package
10502 Set_Static_Elaboration_Desired (Current_Scope, True);
10504 Error_Pragma ("pragma% must apply to a library-level package");
10511 -- pragma Storage_Size (EXPRESSION);
10513 when Pragma_Storage_Size => Storage_Size : declare
10514 P : constant Node_Id := Parent (N);
10518 Check_No_Identifiers;
10519 Check_Arg_Count (1);
10521 -- The expression must be analyzed in the special manner described
10522 -- in "Handling of Default Expressions" in sem.ads.
10524 Arg := Expression (Arg1);
10525 Preanalyze_Spec_Expression (Arg, Any_Integer);
10527 if not Is_Static_Expression (Arg) then
10528 Check_Restriction (Static_Storage_Size, Arg);
10531 if Nkind (P) /= N_Task_Definition then
10536 if Has_Storage_Size_Pragma (P) then
10537 Error_Pragma ("duplicate pragma% not allowed");
10539 Set_Has_Storage_Size_Pragma (P, True);
10542 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10543 -- ??? exp_ch9 should use this!
10551 -- pragma Storage_Unit (NUMERIC_LITERAL);
10553 -- Only permitted argument is System'Storage_Unit value
10555 when Pragma_Storage_Unit =>
10556 Check_No_Identifiers;
10557 Check_Arg_Count (1);
10558 Check_Arg_Is_Integer_Literal (Arg1);
10560 if Intval (Expression (Arg1)) /=
10561 UI_From_Int (Ttypes.System_Storage_Unit)
10563 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
10565 ("the only allowed argument for pragma% is ^", Arg1);
10568 --------------------
10569 -- Stream_Convert --
10570 --------------------
10572 -- pragma Stream_Convert (
10573 -- [Entity =>] type_LOCAL_NAME,
10574 -- [Read =>] function_NAME,
10575 -- [Write =>] function NAME);
10577 when Pragma_Stream_Convert => Stream_Convert : declare
10579 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
10580 -- Check that the given argument is the name of a local
10581 -- function of one argument that is not overloaded earlier
10582 -- in the current local scope. A check is also made that the
10583 -- argument is a function with one parameter.
10585 --------------------------------------
10586 -- Check_OK_Stream_Convert_Function --
10587 --------------------------------------
10589 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
10593 Check_Arg_Is_Local_Name (Arg);
10594 Ent := Entity (Expression (Arg));
10596 if Has_Homonym (Ent) then
10598 ("argument for pragma% may not be overloaded", Arg);
10601 if Ekind (Ent) /= E_Function
10602 or else No (First_Formal (Ent))
10603 or else Present (Next_Formal (First_Formal (Ent)))
10606 ("argument for pragma% must be" &
10607 " function of one argument", Arg);
10609 end Check_OK_Stream_Convert_Function;
10611 -- Start of processing for Stream_Convert
10615 Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
10616 Check_Arg_Count (3);
10617 Check_Optional_Identifier (Arg1, Name_Entity);
10618 Check_Optional_Identifier (Arg2, Name_Read);
10619 Check_Optional_Identifier (Arg3, Name_Write);
10620 Check_Arg_Is_Local_Name (Arg1);
10621 Check_OK_Stream_Convert_Function (Arg2);
10622 Check_OK_Stream_Convert_Function (Arg3);
10625 Typ : constant Entity_Id :=
10626 Underlying_Type (Entity (Expression (Arg1)));
10627 Read : constant Entity_Id := Entity (Expression (Arg2));
10628 Write : constant Entity_Id := Entity (Expression (Arg3));
10631 Check_First_Subtype (Arg1);
10633 -- Check for too early or too late. Note that we don't enforce
10634 -- the rule about primitive operations in this case, since, as
10635 -- is the case for explicit stream attributes themselves, these
10636 -- restrictions are not appropriate. Note that the chaining of
10637 -- the pragma by Rep_Item_Too_Late is actually the critical
10638 -- processing done for this pragma.
10640 if Rep_Item_Too_Early (Typ, N)
10642 Rep_Item_Too_Late (Typ, N, FOnly => True)
10647 -- Return if previous error
10649 if Etype (Typ) = Any_Type
10651 Etype (Read) = Any_Type
10653 Etype (Write) = Any_Type
10660 if Underlying_Type (Etype (Read)) /= Typ then
10662 ("incorrect return type for function&", Arg2);
10665 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
10667 ("incorrect parameter type for function&", Arg3);
10670 if Underlying_Type (Etype (First_Formal (Read))) /=
10671 Underlying_Type (Etype (Write))
10674 ("result type of & does not match Read parameter type",
10678 end Stream_Convert;
10680 -------------------------
10681 -- Style_Checks (GNAT) --
10682 -------------------------
10684 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
10686 -- This is processed by the parser since some of the style
10687 -- checks take place during source scanning and parsing. This
10688 -- means that we don't need to issue error messages here.
10690 when Pragma_Style_Checks => Style_Checks : declare
10691 A : constant Node_Id := Expression (Arg1);
10697 Check_No_Identifiers;
10699 -- Two argument form
10701 if Arg_Count = 2 then
10702 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
10709 E_Id := Expression (Arg2);
10712 if not Is_Entity_Name (E_Id) then
10714 ("second argument of pragma% must be entity name",
10718 E := Entity (E_Id);
10724 Set_Suppress_Style_Checks (E,
10725 (Chars (Expression (Arg1)) = Name_Off));
10726 exit when No (Homonym (E));
10732 -- One argument form
10735 Check_Arg_Count (1);
10737 if Nkind (A) = N_String_Literal then
10741 Slen : constant Natural := Natural (String_Length (S));
10742 Options : String (1 .. Slen);
10748 C := Get_String_Char (S, Int (J));
10749 exit when not In_Character_Range (C);
10750 Options (J) := Get_Character (C);
10752 -- If at end of string, set options. As per discussion
10753 -- above, no need to check for errors, since we issued
10754 -- them in the parser.
10757 Set_Style_Check_Options (Options);
10765 elsif Nkind (A) = N_Identifier then
10766 if Chars (A) = Name_All_Checks then
10767 Set_Default_Style_Check_Options;
10769 elsif Chars (A) = Name_On then
10770 Style_Check := True;
10772 elsif Chars (A) = Name_Off then
10773 Style_Check := False;
10783 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
10785 when Pragma_Subtitle =>
10787 Check_Arg_Count (1);
10788 Check_Optional_Identifier (Arg1, Name_Subtitle);
10789 Check_Arg_Is_String_Literal (Arg1);
10795 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
10797 when Pragma_Suppress =>
10798 Process_Suppress_Unsuppress (True);
10804 -- pragma Suppress_All;
10806 -- The only check made here is that the pragma appears in the
10807 -- proper place, i.e. following a compilation unit. If indeed
10808 -- it appears in this context, then the parser has already
10809 -- inserted an equivalent pragma Suppress (All_Checks) to get
10810 -- the required effect.
10812 when Pragma_Suppress_All =>
10814 Check_Arg_Count (0);
10816 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
10817 or else not Is_List_Member (N)
10818 or else List_Containing (N) /= Pragmas_After (Parent (N))
10821 ("misplaced pragma%, must follow compilation unit");
10824 -------------------------
10825 -- Suppress_Debug_Info --
10826 -------------------------
10828 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
10830 when Pragma_Suppress_Debug_Info =>
10832 Check_Arg_Count (1);
10833 Check_Optional_Identifier (Arg1, Name_Entity);
10834 Check_Arg_Is_Local_Name (Arg1);
10835 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
10837 ----------------------------------
10838 -- Suppress_Exception_Locations --
10839 ----------------------------------
10841 -- pragma Suppress_Exception_Locations;
10843 when Pragma_Suppress_Exception_Locations =>
10845 Check_Arg_Count (0);
10846 Check_Valid_Configuration_Pragma;
10847 Exception_Locations_Suppressed := True;
10849 -----------------------------
10850 -- Suppress_Initialization --
10851 -----------------------------
10853 -- pragma Suppress_Initialization ([Entity =>] type_Name);
10855 when Pragma_Suppress_Initialization => Suppress_Init : declare
10861 Check_Arg_Count (1);
10862 Check_Optional_Identifier (Arg1, Name_Entity);
10863 Check_Arg_Is_Local_Name (Arg1);
10865 E_Id := Expression (Arg1);
10867 if Etype (E_Id) = Any_Type then
10871 E := Entity (E_Id);
10873 if Is_Type (E) then
10874 if Is_Incomplete_Or_Private_Type (E) then
10875 if No (Full_View (Base_Type (E))) then
10877 ("argument of pragma% cannot be an incomplete type",
10880 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
10883 Set_Suppress_Init_Proc (Base_Type (E));
10888 ("pragma% requires argument that is a type name", Arg1);
10896 -- pragma System_Name (DIRECT_NAME);
10898 -- Syntax check: one argument, which must be the identifier GNAT
10899 -- or the identifier GCC, no other identifiers are acceptable.
10901 when Pragma_System_Name =>
10902 Check_No_Identifiers;
10903 Check_Arg_Count (1);
10904 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
10906 -----------------------------
10907 -- Task_Dispatching_Policy --
10908 -----------------------------
10910 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
10912 when Pragma_Task_Dispatching_Policy => declare
10916 Check_Ada_83_Warning;
10917 Check_Arg_Count (1);
10918 Check_No_Identifiers;
10919 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
10920 Check_Valid_Configuration_Pragma;
10921 Get_Name_String (Chars (Expression (Arg1)));
10922 DP := Fold_Upper (Name_Buffer (1));
10924 if Task_Dispatching_Policy /= ' '
10925 and then Task_Dispatching_Policy /= DP
10927 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
10929 ("task dispatching policy incompatible with policy#");
10931 -- Set new policy, but always preserve System_Location since
10932 -- we like the error message with the run time name.
10935 Task_Dispatching_Policy := DP;
10937 if Task_Dispatching_Policy_Sloc /= System_Location then
10938 Task_Dispatching_Policy_Sloc := Loc;
10947 -- pragma Task_Info (EXPRESSION);
10949 when Pragma_Task_Info => Task_Info : declare
10950 P : constant Node_Id := Parent (N);
10955 if Nkind (P) /= N_Task_Definition then
10956 Error_Pragma ("pragma% must appear in task definition");
10959 Check_No_Identifiers;
10960 Check_Arg_Count (1);
10962 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
10964 if Etype (Expression (Arg1)) = Any_Type then
10968 if Has_Task_Info_Pragma (P) then
10969 Error_Pragma ("duplicate pragma% not allowed");
10971 Set_Has_Task_Info_Pragma (P, True);
10979 -- pragma Task_Name (string_EXPRESSION);
10981 when Pragma_Task_Name => Task_Name : declare
10982 P : constant Node_Id := Parent (N);
10986 Check_No_Identifiers;
10987 Check_Arg_Count (1);
10989 Arg := Expression (Arg1);
10990 Analyze_And_Resolve (Arg, Standard_String);
10992 if Nkind (P) /= N_Task_Definition then
10996 if Has_Task_Name_Pragma (P) then
10997 Error_Pragma ("duplicate pragma% not allowed");
10999 Set_Has_Task_Name_Pragma (P, True);
11000 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
11008 -- pragma Task_Storage (
11009 -- [Task_Type =>] LOCAL_NAME,
11010 -- [Top_Guard =>] static_integer_EXPRESSION);
11012 when Pragma_Task_Storage => Task_Storage : declare
11013 Args : Args_List (1 .. 2);
11014 Names : constant Name_List (1 .. 2) := (
11018 Task_Type : Node_Id renames Args (1);
11019 Top_Guard : Node_Id renames Args (2);
11025 Gather_Associations (Names, Args);
11027 if No (Task_Type) then
11029 ("missing task_type argument for pragma%");
11032 Check_Arg_Is_Local_Name (Task_Type);
11034 Ent := Entity (Task_Type);
11036 if not Is_Task_Type (Ent) then
11038 ("argument for pragma% must be task type", Task_Type);
11041 if No (Top_Guard) then
11043 ("pragma% takes two arguments", Task_Type);
11045 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
11048 Check_First_Subtype (Task_Type);
11050 if Rep_Item_Too_Late (Ent, N) then
11059 -- pragma Time_Slice (static_duration_EXPRESSION);
11061 when Pragma_Time_Slice => Time_Slice : declare
11067 Check_Arg_Count (1);
11068 Check_No_Identifiers;
11069 Check_In_Main_Program;
11070 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
11072 if not Error_Posted (Arg1) then
11074 while Present (Nod) loop
11075 if Nkind (Nod) = N_Pragma
11076 and then Pragma_Name (Nod) = Name_Time_Slice
11078 Error_Msg_Name_1 := Pname;
11079 Error_Msg_N ("duplicate pragma% not permitted", Nod);
11086 -- Process only if in main unit
11088 if Get_Source_Unit (Loc) = Main_Unit then
11089 Opt.Time_Slice_Set := True;
11090 Val := Expr_Value_R (Expression (Arg1));
11092 if Val <= Ureal_0 then
11093 Opt.Time_Slice_Value := 0;
11095 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
11096 Opt.Time_Slice_Value := 1_000_000_000;
11099 Opt.Time_Slice_Value :=
11100 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
11109 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
11111 -- TITLING_OPTION ::=
11112 -- [Title =>] STRING_LITERAL
11113 -- | [Subtitle =>] STRING_LITERAL
11115 when Pragma_Title => Title : declare
11116 Args : Args_List (1 .. 2);
11117 Names : constant Name_List (1 .. 2) := (
11123 Gather_Associations (Names, Args);
11125 for J in 1 .. 2 loop
11126 if Present (Args (J)) then
11127 Check_Arg_Is_String_Literal (Args (J));
11132 ---------------------
11133 -- Unchecked_Union --
11134 ---------------------
11136 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
11138 when Pragma_Unchecked_Union => Unchecked_Union : declare
11139 Assoc : constant Node_Id := Arg1;
11140 Type_Id : constant Node_Id := Expression (Assoc);
11151 Check_No_Identifiers;
11152 Check_Arg_Count (1);
11153 Check_Arg_Is_Local_Name (Arg1);
11155 Find_Type (Type_Id);
11156 Typ := Entity (Type_Id);
11159 or else Rep_Item_Too_Early (Typ, N)
11163 Typ := Underlying_Type (Typ);
11166 if Rep_Item_Too_Late (Typ, N) then
11170 Check_First_Subtype (Arg1);
11172 -- Note remaining cases are references to a type in the current
11173 -- declarative part. If we find an error, we post the error on
11174 -- the relevant type declaration at an appropriate point.
11176 if not Is_Record_Type (Typ) then
11177 Error_Msg_N ("Unchecked_Union must be record type", Typ);
11180 elsif Is_Tagged_Type (Typ) then
11181 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
11184 elsif Is_Limited_Type (Typ) then
11186 ("Unchecked_Union must not be limited record type", Typ);
11187 Explain_Limited_Type (Typ, Typ);
11191 if not Has_Discriminants (Typ) then
11193 ("Unchecked_Union must have one discriminant", Typ);
11197 Discr := First_Discriminant (Typ);
11198 while Present (Discr) loop
11199 if No (Discriminant_Default_Value (Discr)) then
11201 ("Unchecked_Union discriminant must have default value",
11204 Next_Discriminant (Discr);
11207 Tdef := Type_Definition (Declaration_Node (Typ));
11208 Clist := Component_List (Tdef);
11210 Comp := First (Component_Items (Clist));
11211 while Present (Comp) loop
11212 Check_Component (Comp);
11216 if No (Clist) or else No (Variant_Part (Clist)) then
11218 ("Unchecked_Union must have variant part",
11223 Vpart := Variant_Part (Clist);
11225 Variant := First (Variants (Vpart));
11226 while Present (Variant) loop
11227 Check_Variant (Variant);
11232 Set_Is_Unchecked_Union (Typ, True);
11233 Set_Convention (Typ, Convention_C);
11235 Set_Has_Unchecked_Union (Base_Type (Typ), True);
11236 Set_Is_Unchecked_Union (Base_Type (Typ), True);
11237 end Unchecked_Union;
11239 ------------------------
11240 -- Unimplemented_Unit --
11241 ------------------------
11243 -- pragma Unimplemented_Unit;
11245 -- Note: this only gives an error if we are generating code,
11246 -- or if we are in a generic library unit (where the pragma
11247 -- appears in the body, not in the spec).
11249 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
11250 Cunitent : constant Entity_Id :=
11251 Cunit_Entity (Get_Source_Unit (Loc));
11252 Ent_Kind : constant Entity_Kind :=
11257 Check_Arg_Count (0);
11259 if Operating_Mode = Generate_Code
11260 or else Ent_Kind = E_Generic_Function
11261 or else Ent_Kind = E_Generic_Procedure
11262 or else Ent_Kind = E_Generic_Package
11264 Get_Name_String (Chars (Cunitent));
11265 Set_Casing (Mixed_Case);
11266 Write_Str (Name_Buffer (1 .. Name_Len));
11267 Write_Str (" is not supported in this configuration");
11269 raise Unrecoverable_Error;
11271 end Unimplemented_Unit;
11273 ------------------------
11274 -- Universal_Aliasing --
11275 ------------------------
11277 -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)];
11279 when Pragma_Universal_Aliasing => Universal_Alias : declare
11284 Check_Arg_Count (1);
11285 Check_Optional_Identifier (Arg2, Name_Entity);
11286 Check_Arg_Is_Local_Name (Arg1);
11287 E_Id := Entity (Expression (Arg1));
11289 if E_Id = Any_Type then
11291 elsif No (E_Id) or else not Is_Type (E_Id) then
11292 Error_Pragma_Arg ("pragma% requires type", Arg1);
11295 Set_Universal_Aliasing (Implementation_Base_Type (E_Id));
11296 end Universal_Alias;
11298 --------------------
11299 -- Universal_Data --
11300 --------------------
11302 -- pragma Universal_Data [(library_unit_NAME)];
11304 when Pragma_Universal_Data =>
11307 -- If this is a configuration pragma, then set the universal
11308 -- addressing option, otherwise confirm that the pragma
11309 -- satisfies the requirements of library unit pragma placement
11310 -- and leave it to the GNAAMP back end to detect the pragma
11311 -- (avoids transitive setting of the option due to withed units).
11313 if Is_Configuration_Pragma then
11314 Universal_Addressing_On_AAMP := True;
11316 Check_Valid_Library_Unit_Pragma;
11319 if not AAMP_On_Target then
11320 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
11327 -- pragma Unmodified (local_Name {, local_Name});
11329 when Pragma_Unmodified => Unmodified : declare
11330 Arg_Node : Node_Id;
11331 Arg_Expr : Node_Id;
11332 Arg_Ent : Entity_Id;
11336 Check_At_Least_N_Arguments (1);
11338 -- Loop through arguments
11341 while Present (Arg_Node) loop
11342 Check_No_Identifier (Arg_Node);
11344 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11345 -- will in fact generate reference, so that the entity will
11346 -- have a reference, which will inhibit any warnings about
11347 -- it not being referenced, and also properly show up in the
11348 -- ali file as a reference. But this reference is recorded
11349 -- before the Has_Pragma_Unreferenced flag is set, so that
11350 -- no warning is generated for this reference.
11352 Check_Arg_Is_Local_Name (Arg_Node);
11353 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11355 if Is_Entity_Name (Arg_Expr) then
11356 Arg_Ent := Entity (Arg_Expr);
11358 if not Is_Assignable (Arg_Ent) then
11360 ("pragma% can only be applied to a variable",
11363 Set_Has_Pragma_Unmodified (Arg_Ent);
11375 -- pragma Unreferenced (local_Name {, local_Name});
11377 -- or when used in a context clause:
11379 -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
11381 when Pragma_Unreferenced => Unreferenced : declare
11382 Arg_Node : Node_Id;
11383 Arg_Expr : Node_Id;
11384 Arg_Ent : Entity_Id;
11389 Check_At_Least_N_Arguments (1);
11391 -- Check case of appearing within context clause
11393 if Is_In_Context_Clause then
11395 -- The arguments must all be units mentioned in a with clause
11396 -- in the same context clause. Note we already checked (in
11397 -- Par.Prag) that the arguments are either identifiers or
11398 -- selected components.
11401 while Present (Arg_Node) loop
11402 Citem := First (List_Containing (N));
11403 while Citem /= N loop
11404 if Nkind (Citem) = N_With_Clause
11405 and then Same_Name (Name (Citem), Expression (Arg_Node))
11407 Set_Has_Pragma_Unreferenced
11410 (Library_Unit (Citem))));
11411 Set_Unit_Name (Expression (Arg_Node), Name (Citem));
11420 ("argument of pragma% is not with'ed unit", Arg_Node);
11426 -- Case of not in list of context items
11430 while Present (Arg_Node) loop
11431 Check_No_Identifier (Arg_Node);
11433 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11434 -- will in fact generate reference, so that the entity will
11435 -- have a reference, which will inhibit any warnings about
11436 -- it not being referenced, and also properly show up in the
11437 -- ali file as a reference. But this reference is recorded
11438 -- before the Has_Pragma_Unreferenced flag is set, so that
11439 -- no warning is generated for this reference.
11441 Check_Arg_Is_Local_Name (Arg_Node);
11442 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11444 if Is_Entity_Name (Arg_Expr) then
11445 Arg_Ent := Entity (Arg_Expr);
11447 -- If the entity is overloaded, the pragma applies to the
11448 -- most recent overloading, as documented. In this case,
11449 -- name resolution does not generate a reference, so it
11450 -- must be done here explicitly.
11452 if Is_Overloaded (Arg_Expr) then
11453 Generate_Reference (Arg_Ent, N);
11456 Set_Has_Pragma_Unreferenced (Arg_Ent);
11464 --------------------------
11465 -- Unreferenced_Objects --
11466 --------------------------
11468 -- pragma Unreferenced_Objects (local_Name {, local_Name});
11470 when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare
11471 Arg_Node : Node_Id;
11472 Arg_Expr : Node_Id;
11476 Check_At_Least_N_Arguments (1);
11479 while Present (Arg_Node) loop
11480 Check_No_Identifier (Arg_Node);
11481 Check_Arg_Is_Local_Name (Arg_Node);
11482 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11484 if not Is_Entity_Name (Arg_Expr)
11485 or else not Is_Type (Entity (Arg_Expr))
11488 ("argument for pragma% must be type or subtype", Arg_Node);
11491 Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr));
11494 end Unreferenced_Objects;
11496 ------------------------------
11497 -- Unreserve_All_Interrupts --
11498 ------------------------------
11500 -- pragma Unreserve_All_Interrupts;
11502 when Pragma_Unreserve_All_Interrupts =>
11504 Check_Arg_Count (0);
11506 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
11507 Unreserve_All_Interrupts := True;
11514 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
11516 when Pragma_Unsuppress =>
11518 Process_Suppress_Unsuppress (False);
11520 -------------------
11521 -- Use_VADS_Size --
11522 -------------------
11524 -- pragma Use_VADS_Size;
11526 when Pragma_Use_VADS_Size =>
11528 Check_Arg_Count (0);
11529 Check_Valid_Configuration_Pragma;
11530 Use_VADS_Size := True;
11532 ---------------------
11533 -- Validity_Checks --
11534 ---------------------
11536 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
11538 when Pragma_Validity_Checks => Validity_Checks : declare
11539 A : constant Node_Id := Expression (Arg1);
11545 Check_Arg_Count (1);
11546 Check_No_Identifiers;
11548 if Nkind (A) = N_String_Literal then
11552 Slen : constant Natural := Natural (String_Length (S));
11553 Options : String (1 .. Slen);
11559 C := Get_String_Char (S, Int (J));
11560 exit when not In_Character_Range (C);
11561 Options (J) := Get_Character (C);
11564 Set_Validity_Check_Options (Options);
11572 elsif Nkind (A) = N_Identifier then
11574 if Chars (A) = Name_All_Checks then
11575 Set_Validity_Check_Options ("a");
11577 elsif Chars (A) = Name_On then
11578 Validity_Checks_On := True;
11580 elsif Chars (A) = Name_Off then
11581 Validity_Checks_On := False;
11585 end Validity_Checks;
11591 -- pragma Volatile (LOCAL_NAME);
11593 when Pragma_Volatile =>
11594 Process_Atomic_Shared_Volatile;
11596 -------------------------
11597 -- Volatile_Components --
11598 -------------------------
11600 -- pragma Volatile_Components (array_LOCAL_NAME);
11602 -- Volatile is handled by the same circuit as Atomic_Components
11608 -- pragma Warnings (On | Off);
11609 -- pragma Warnings (On | Off, LOCAL_NAME);
11610 -- pragma Warnings (static_string_EXPRESSION);
11611 -- pragma Warnings (On | Off, STRING_LITERAL);
11613 when Pragma_Warnings => Warnings : begin
11615 Check_At_Least_N_Arguments (1);
11616 Check_No_Identifiers;
11619 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
11622 -- One argument case
11624 if Arg_Count = 1 then
11626 -- On/Off one argument case was processed by parser
11628 if Nkind (Argx) = N_Identifier
11630 (Chars (Argx) = Name_On
11632 Chars (Argx) = Name_Off)
11636 -- One argument case must be ON/OFF or static string expr
11638 elsif not Is_Static_String_Expression (Arg1) then
11640 ("argument of pragma% must be On/Off or " &
11641 "static string expression", Arg2);
11643 -- One argument string expression case
11647 Lit : constant Node_Id := Expr_Value_S (Argx);
11648 Str : constant String_Id := Strval (Lit);
11649 Len : constant Nat := String_Length (Str);
11657 while J <= Len loop
11658 C := Get_String_Char (Str, J);
11659 OK := In_Character_Range (C);
11662 Chr := Get_Character (C);
11666 if J < Len and then Chr = '.' then
11668 C := Get_String_Char (Str, J);
11669 Chr := Get_Character (C);
11671 if not Set_Dot_Warning_Switch (Chr) then
11673 ("invalid warning switch character " &
11680 OK := Set_Warning_Switch (Chr);
11686 ("invalid warning switch character " & Chr,
11695 -- Two or more arguments (must be two)
11698 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
11699 Check_At_Most_N_Arguments (2);
11707 E_Id := Expression (Arg2);
11710 -- In the expansion of an inlined body, a reference to
11711 -- the formal may be wrapped in a conversion if the
11712 -- actual is a conversion. Retrieve the real entity name.
11714 if (In_Instance_Body
11715 or else In_Inlined_Body)
11716 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
11718 E_Id := Expression (E_Id);
11721 -- Entity name case
11723 if Is_Entity_Name (E_Id) then
11724 E := Entity (E_Id);
11731 (E, (Chars (Expression (Arg1)) = Name_Off));
11733 if Chars (Expression (Arg1)) = Name_Off
11734 and then Warn_On_Warnings_Off
11736 Warnings_Off_Pragmas.Append ((N, E));
11739 if Is_Enumeration_Type (E) then
11743 Lit := First_Literal (E);
11744 while Present (Lit) loop
11745 Set_Warnings_Off (Lit);
11746 Next_Literal (Lit);
11751 exit when No (Homonym (E));
11756 -- Error if not entity or static string literal case
11758 elsif not Is_Static_String_Expression (Arg2) then
11760 ("second argument of pragma% must be entity " &
11761 "name or static string expression", Arg2);
11763 -- String literal case
11766 String_To_Name_Buffer
11767 (Strval (Expr_Value_S (Expression (Arg2))));
11769 -- Note on configuration pragma case: If this is a
11770 -- configuration pragma, then for an OFF pragma, we
11771 -- just set Config True in the call, which is all
11772 -- that needs to be done. For the case of ON, this
11773 -- is normally an error, unless it is canceling the
11774 -- effect of a previous OFF pragma in the same file.
11775 -- In any other case, an error will be signalled (ON
11776 -- with no matching OFF).
11778 if Chars (Argx) = Name_Off then
11779 Set_Specific_Warning_Off
11780 (Loc, Name_Buffer (1 .. Name_Len),
11781 Config => Is_Configuration_Pragma);
11783 elsif Chars (Argx) = Name_On then
11784 Set_Specific_Warning_On
11785 (Loc, Name_Buffer (1 .. Name_Len), Err);
11789 ("?pragma Warnings On with no " &
11790 "matching Warnings Off",
11800 -------------------
11801 -- Weak_External --
11802 -------------------
11804 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
11806 when Pragma_Weak_External => Weak_External : declare
11811 Check_Arg_Count (1);
11812 Check_Optional_Identifier (Arg1, Name_Entity);
11813 Check_Arg_Is_Library_Level_Local_Name (Arg1);
11814 Ent := Entity (Expression (Arg1));
11816 if Rep_Item_Too_Early (Ent, N) then
11819 Ent := Underlying_Type (Ent);
11822 -- The only processing required is to link this item on to the
11823 -- list of rep items for the given entity. This is accomplished
11824 -- by the call to Rep_Item_Too_Late (when no error is detected
11825 -- and False is returned).
11827 if Rep_Item_Too_Late (Ent, N) then
11830 Set_Has_Gigi_Rep_Item (Ent);
11834 -----------------------------
11835 -- Wide_Character_Encoding --
11836 -----------------------------
11838 -- pragma Wide_Character_Encoding (IDENTIFIER);
11840 when Pragma_Wide_Character_Encoding =>
11842 -- Nothing to do, handled in parser. Note that we do not enforce
11843 -- configuration pragma placement, this pragma can appear at any
11844 -- place in the source, allowing mixed encodings within a single
11849 --------------------
11850 -- Unknown_Pragma --
11851 --------------------
11853 -- Should be impossible, since the case of an unknown pragma is
11854 -- separately processed before the case statement is entered.
11856 when Unknown_Pragma =>
11857 raise Program_Error;
11861 when Pragma_Exit => null;
11862 end Analyze_Pragma;
11864 -------------------
11865 -- Check_Enabled --
11866 -------------------
11868 function Check_Enabled (Nam : Name_Id) return Boolean is
11872 PP := Opt.Check_Policy_List;
11875 return Assertions_Enabled;
11878 Nam = Chars (Expression (First (Pragma_Argument_Associations (PP))))
11881 Chars (Expression (Last (Pragma_Argument_Associations (PP))))
11883 when Name_On | Name_Check =>
11885 when Name_Off | Name_Ignore =>
11888 raise Program_Error;
11892 PP := Next_Pragma (PP);
11897 ---------------------------------
11898 -- Delay_Config_Pragma_Analyze --
11899 ---------------------------------
11901 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
11903 return Pragma_Name (N) = Name_Interrupt_State
11905 Pragma_Name (N) = Name_Priority_Specific_Dispatching;
11906 end Delay_Config_Pragma_Analyze;
11908 -------------------------
11909 -- Get_Base_Subprogram --
11910 -------------------------
11912 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
11913 Result : Entity_Id;
11916 -- Follow subprogram renaming chain
11919 while Is_Subprogram (Result)
11921 (Is_Generic_Instance (Result)
11922 or else Nkind (Parent (Declaration_Node (Result))) =
11923 N_Subprogram_Renaming_Declaration)
11924 and then Present (Alias (Result))
11926 Result := Alias (Result);
11930 end Get_Base_Subprogram;
11932 --------------------
11933 -- Get_Pragma_Arg --
11934 --------------------
11936 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
11938 if Nkind (Arg) = N_Pragma_Argument_Association then
11939 return Expression (Arg);
11943 end Get_Pragma_Arg;
11949 procedure Initialize is
11954 -----------------------------
11955 -- Is_Config_Static_String --
11956 -----------------------------
11958 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
11960 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
11961 -- This is an internal recursive function that is just like the
11962 -- outer function except that it adds the string to the name buffer
11963 -- rather than placing the string in the name buffer.
11965 ------------------------------
11966 -- Add_Config_Static_String --
11967 ------------------------------
11969 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
11976 if Nkind (N) = N_Op_Concat then
11977 if Add_Config_Static_String (Left_Opnd (N)) then
11978 N := Right_Opnd (N);
11984 if Nkind (N) /= N_String_Literal then
11985 Error_Msg_N ("string literal expected for pragma argument", N);
11989 for J in 1 .. String_Length (Strval (N)) loop
11990 C := Get_String_Char (Strval (N), J);
11992 if not In_Character_Range (C) then
11994 ("string literal contains invalid wide character",
11995 Sloc (N) + 1 + Source_Ptr (J));
11999 Add_Char_To_Name_Buffer (Get_Character (C));
12004 end Add_Config_Static_String;
12006 -- Start of processing for Is_Config_Static_String
12011 return Add_Config_Static_String (Arg);
12012 end Is_Config_Static_String;
12014 -----------------------------------------
12015 -- Is_Non_Significant_Pragma_Reference --
12016 -----------------------------------------
12018 -- This function makes use of the following static table which indicates
12019 -- whether a given pragma is significant. A value of -1 in this table
12020 -- indicates that the reference is significant. A value of zero indicates
12021 -- than appearance as any argument is insignificant, a positive value
12022 -- indicates that appearance in that parameter position is significant.
12024 -- A value of 99 flags a special case requiring a special check (this is
12025 -- used for cases not covered by this standard encoding, e.g. pragma Check
12026 -- where the first argument is not significant, but the others are).
12028 Sig_Flags : constant array (Pragma_Id) of Int :=
12029 (Pragma_AST_Entry => -1,
12030 Pragma_Abort_Defer => -1,
12031 Pragma_Ada_83 => -1,
12032 Pragma_Ada_95 => -1,
12033 Pragma_Ada_05 => -1,
12034 Pragma_Ada_2005 => -1,
12035 Pragma_All_Calls_Remote => -1,
12036 Pragma_Annotate => -1,
12037 Pragma_Assert => -1,
12038 Pragma_Assertion_Policy => 0,
12039 Pragma_Asynchronous => -1,
12040 Pragma_Atomic => 0,
12041 Pragma_Atomic_Components => 0,
12042 Pragma_Attach_Handler => -1,
12043 Pragma_Check => 99,
12044 Pragma_Check_Name => 0,
12045 Pragma_Check_Policy => 0,
12046 Pragma_CIL_Constructor => -1,
12047 Pragma_CPP_Class => 0,
12048 Pragma_CPP_Constructor => 0,
12049 Pragma_CPP_Virtual => 0,
12050 Pragma_CPP_Vtable => 0,
12051 Pragma_C_Pass_By_Copy => 0,
12052 Pragma_Comment => 0,
12053 Pragma_Common_Object => -1,
12054 Pragma_Compile_Time_Error => -1,
12055 Pragma_Compile_Time_Warning => -1,
12056 Pragma_Compiler_Unit => 0,
12057 Pragma_Complete_Representation => 0,
12058 Pragma_Complex_Representation => 0,
12059 Pragma_Component_Alignment => -1,
12060 Pragma_Controlled => 0,
12061 Pragma_Convention => 0,
12062 Pragma_Convention_Identifier => 0,
12063 Pragma_Debug => -1,
12064 Pragma_Debug_Policy => 0,
12065 Pragma_Detect_Blocking => -1,
12066 Pragma_Discard_Names => 0,
12067 Pragma_Elaborate => -1,
12068 Pragma_Elaborate_All => -1,
12069 Pragma_Elaborate_Body => -1,
12070 Pragma_Elaboration_Checks => -1,
12071 Pragma_Eliminate => -1,
12072 Pragma_Export => -1,
12073 Pragma_Export_Exception => -1,
12074 Pragma_Export_Function => -1,
12075 Pragma_Export_Object => -1,
12076 Pragma_Export_Procedure => -1,
12077 Pragma_Export_Value => -1,
12078 Pragma_Export_Valued_Procedure => -1,
12079 Pragma_Extend_System => -1,
12080 Pragma_Extensions_Allowed => -1,
12081 Pragma_External => -1,
12082 Pragma_Favor_Top_Level => -1,
12083 Pragma_External_Name_Casing => -1,
12084 Pragma_Fast_Math => -1,
12085 Pragma_Finalize_Storage_Only => 0,
12086 Pragma_Float_Representation => 0,
12087 Pragma_Ident => -1,
12088 Pragma_Implemented_By_Entry => -1,
12089 Pragma_Implicit_Packing => 0,
12090 Pragma_Import => +2,
12091 Pragma_Import_Exception => 0,
12092 Pragma_Import_Function => 0,
12093 Pragma_Import_Object => 0,
12094 Pragma_Import_Procedure => 0,
12095 Pragma_Import_Valued_Procedure => 0,
12096 Pragma_Initialize_Scalars => -1,
12097 Pragma_Inline => 0,
12098 Pragma_Inline_Always => 0,
12099 Pragma_Inline_Generic => 0,
12100 Pragma_Inspection_Point => -1,
12101 Pragma_Interface => +2,
12102 Pragma_Interface_Name => +2,
12103 Pragma_Interrupt_Handler => -1,
12104 Pragma_Interrupt_Priority => -1,
12105 Pragma_Interrupt_State => -1,
12106 Pragma_Java_Constructor => -1,
12107 Pragma_Java_Interface => -1,
12108 Pragma_Keep_Names => 0,
12109 Pragma_License => -1,
12110 Pragma_Link_With => -1,
12111 Pragma_Linker_Alias => -1,
12112 Pragma_Linker_Constructor => -1,
12113 Pragma_Linker_Destructor => -1,
12114 Pragma_Linker_Options => -1,
12115 Pragma_Linker_Section => -1,
12117 Pragma_Locking_Policy => -1,
12118 Pragma_Long_Float => -1,
12119 Pragma_Machine_Attribute => -1,
12121 Pragma_Main_Storage => -1,
12122 Pragma_Memory_Size => -1,
12123 Pragma_No_Return => 0,
12124 Pragma_No_Body => 0,
12125 Pragma_No_Run_Time => -1,
12126 Pragma_No_Strict_Aliasing => -1,
12127 Pragma_Normalize_Scalars => -1,
12128 Pragma_Obsolescent => 0,
12129 Pragma_Optimize => -1,
12130 Pragma_Optimize_Alignment => -1,
12133 Pragma_Passive => -1,
12134 Pragma_Preelaborable_Initialization => -1,
12135 Pragma_Polling => -1,
12136 Pragma_Persistent_BSS => 0,
12137 Pragma_Postcondition => -1,
12138 Pragma_Precondition => -1,
12139 Pragma_Preelaborate => -1,
12140 Pragma_Preelaborate_05 => -1,
12141 Pragma_Priority => -1,
12142 Pragma_Priority_Specific_Dispatching => -1,
12143 Pragma_Profile => 0,
12144 Pragma_Profile_Warnings => 0,
12145 Pragma_Propagate_Exceptions => -1,
12146 Pragma_Psect_Object => -1,
12148 Pragma_Pure_05 => -1,
12149 Pragma_Pure_Function => -1,
12150 Pragma_Queuing_Policy => -1,
12151 Pragma_Ravenscar => -1,
12152 Pragma_Relative_Deadline => -1,
12153 Pragma_Remote_Call_Interface => -1,
12154 Pragma_Remote_Types => -1,
12155 Pragma_Restricted_Run_Time => -1,
12156 Pragma_Restriction_Warnings => -1,
12157 Pragma_Restrictions => -1,
12158 Pragma_Reviewable => -1,
12159 Pragma_Share_Generic => -1,
12160 Pragma_Shared => -1,
12161 Pragma_Shared_Passive => -1,
12162 Pragma_Source_File_Name => -1,
12163 Pragma_Source_File_Name_Project => -1,
12164 Pragma_Source_Reference => -1,
12165 Pragma_Storage_Size => -1,
12166 Pragma_Storage_Unit => -1,
12167 Pragma_Static_Elaboration_Desired => -1,
12168 Pragma_Stream_Convert => -1,
12169 Pragma_Style_Checks => -1,
12170 Pragma_Subtitle => -1,
12171 Pragma_Suppress => 0,
12172 Pragma_Suppress_Exception_Locations => 0,
12173 Pragma_Suppress_All => -1,
12174 Pragma_Suppress_Debug_Info => 0,
12175 Pragma_Suppress_Initialization => 0,
12176 Pragma_System_Name => -1,
12177 Pragma_Task_Dispatching_Policy => -1,
12178 Pragma_Task_Info => -1,
12179 Pragma_Task_Name => -1,
12180 Pragma_Task_Storage => 0,
12181 Pragma_Time_Slice => -1,
12182 Pragma_Title => -1,
12183 Pragma_Unchecked_Union => 0,
12184 Pragma_Unimplemented_Unit => -1,
12185 Pragma_Universal_Aliasing => -1,
12186 Pragma_Universal_Data => -1,
12187 Pragma_Unmodified => -1,
12188 Pragma_Unreferenced => -1,
12189 Pragma_Unreferenced_Objects => -1,
12190 Pragma_Unreserve_All_Interrupts => -1,
12191 Pragma_Unsuppress => 0,
12192 Pragma_Use_VADS_Size => -1,
12193 Pragma_Validity_Checks => -1,
12194 Pragma_Volatile => 0,
12195 Pragma_Volatile_Components => 0,
12196 Pragma_Warnings => -1,
12197 Pragma_Weak_External => -1,
12198 Pragma_Wide_Character_Encoding => 0,
12199 Unknown_Pragma => 0);
12201 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
12210 if Nkind (P) /= N_Pragma_Argument_Association then
12214 Id := Get_Pragma_Id (Parent (P));
12215 C := Sig_Flags (Id);
12227 -- For pragma Check, the first argument is not significant,
12228 -- the second and the third (if present) arguments are
12231 when Pragma_Check =>
12233 P = First (Pragma_Argument_Associations (Parent (P)));
12236 raise Program_Error;
12240 A := First (Pragma_Argument_Associations (Parent (P)));
12241 for J in 1 .. C - 1 loop
12249 return A = P; -- is this wrong way round ???
12252 end Is_Non_Significant_Pragma_Reference;
12254 ------------------------------
12255 -- Is_Pragma_String_Literal --
12256 ------------------------------
12258 -- This function returns true if the corresponding pragma argument is
12259 -- a static string expression. These are the only cases in which string
12260 -- literals can appear as pragma arguments. We also allow a string
12261 -- literal as the first argument to pragma Assert (although it will
12262 -- of course always generate a type error).
12264 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
12265 Pragn : constant Node_Id := Parent (Par);
12266 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
12267 Pname : constant Name_Id := Pragma_Name (Pragn);
12273 N := First (Assoc);
12280 if Pname = Name_Assert then
12283 elsif Pname = Name_Export then
12286 elsif Pname = Name_Ident then
12289 elsif Pname = Name_Import then
12292 elsif Pname = Name_Interface_Name then
12295 elsif Pname = Name_Linker_Alias then
12298 elsif Pname = Name_Linker_Section then
12301 elsif Pname = Name_Machine_Attribute then
12304 elsif Pname = Name_Source_File_Name then
12307 elsif Pname = Name_Source_Reference then
12310 elsif Pname = Name_Title then
12313 elsif Pname = Name_Subtitle then
12319 end Is_Pragma_String_Literal;
12321 --------------------------------------
12322 -- Process_Compilation_Unit_Pragmas --
12323 --------------------------------------
12325 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
12327 -- A special check for pragma Suppress_All. This is a strange DEC
12328 -- pragma, strange because it comes at the end of the unit. If we
12329 -- have a pragma Suppress_All in the Pragmas_After of the current
12330 -- unit, then we insert a pragma Suppress (All_Checks) at the start
12331 -- of the context clause to ensure the correct processing.
12334 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
12338 if Present (PA) then
12340 while Present (P) loop
12341 if Pragma_Name (P) = Name_Suppress_All then
12342 Prepend_To (Context_Items (N),
12343 Make_Pragma (Sloc (P),
12344 Chars => Name_Suppress,
12345 Pragma_Argument_Associations => New_List (
12346 Make_Pragma_Argument_Association (Sloc (P),
12348 Make_Identifier (Sloc (P),
12349 Chars => Name_All_Checks)))));
12357 end Process_Compilation_Unit_Pragmas;
12368 --------------------------------
12369 -- Set_Encoded_Interface_Name --
12370 --------------------------------
12372 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
12373 Str : constant String_Id := Strval (S);
12374 Len : constant Int := String_Length (Str);
12379 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
12382 -- Stores encoded value of character code CC. The encoding we
12383 -- use an underscore followed by four lower case hex digits.
12389 procedure Encode is
12391 Store_String_Char (Get_Char_Code ('_'));
12393 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
12395 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
12397 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
12399 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
12402 -- Start of processing for Set_Encoded_Interface_Name
12405 -- If first character is asterisk, this is a link name, and we
12406 -- leave it completely unmodified. We also ignore null strings
12407 -- (the latter case happens only in error cases) and no encoding
12408 -- should occur for Java or AAMP interface names.
12411 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
12412 or else VM_Target /= No_VM
12413 or else AAMP_On_Target
12415 Set_Interface_Name (E, S);
12420 CC := Get_String_Char (Str, J);
12422 exit when not In_Character_Range (CC);
12424 C := Get_Character (CC);
12426 exit when C /= '_' and then C /= '$'
12427 and then C not in '0' .. '9'
12428 and then C not in 'a' .. 'z'
12429 and then C not in 'A' .. 'Z';
12432 Set_Interface_Name (E, S);
12440 -- Here we need to encode. The encoding we use as follows:
12441 -- three underscores + four hex digits (lower case)
12445 for J in 1 .. String_Length (Str) loop
12446 CC := Get_String_Char (Str, J);
12448 if not In_Character_Range (CC) then
12451 C := Get_Character (CC);
12453 if C = '_' or else C = '$'
12454 or else C in '0' .. '9'
12455 or else C in 'a' .. 'z'
12456 or else C in 'A' .. 'Z'
12458 Store_String_Char (CC);
12465 Set_Interface_Name (E,
12466 Make_String_Literal (Sloc (S),
12467 Strval => End_String));
12469 end Set_Encoded_Interface_Name;
12471 -------------------
12472 -- Set_Unit_Name --
12473 -------------------
12475 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
12480 if Nkind (N) = N_Identifier
12481 and then Nkind (With_Item) = N_Identifier
12483 Set_Entity (N, Entity (With_Item));
12485 elsif Nkind (N) = N_Selected_Component then
12486 Change_Selected_Component_To_Expanded_Name (N);
12487 Set_Entity (N, Entity (With_Item));
12488 Set_Entity (Selector_Name (N), Entity (N));
12490 Pref := Prefix (N);
12491 Scop := Scope (Entity (N));
12492 while Nkind (Pref) = N_Selected_Component loop
12493 Change_Selected_Component_To_Expanded_Name (Pref);
12494 Set_Entity (Selector_Name (Pref), Scop);
12495 Set_Entity (Pref, Scop);
12496 Pref := Prefix (Pref);
12497 Scop := Scope (Scop);
12500 Set_Entity (Pref, Scop);