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 False for Restrictions, True for Restriction_Warnings.
676 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
677 -- Common processing for Suppress and Unsuppress. The boolean parameter
678 -- Suppress_Case is True for the Suppress case, and False for the
681 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
682 -- This procedure sets the Is_Exported flag for the given entity,
683 -- checking that the entity was not previously imported. Arg is
684 -- the argument that specified the entity. A check is also made
685 -- for exporting inappropriate entities.
687 procedure Set_Extended_Import_Export_External_Name
688 (Internal_Ent : Entity_Id;
689 Arg_External : Node_Id);
690 -- Common processing for all extended import export pragmas. The first
691 -- argument, Internal_Ent, is the internal entity, which has already
692 -- been checked for validity by the caller. Arg_External is from the
693 -- Import or Export pragma, and may be null if no External parameter
694 -- was present. If Arg_External is present and is a non-null string
695 -- (a null string is treated as the default), then the Interface_Name
696 -- field of Internal_Ent is set appropriately.
698 procedure Set_Imported (E : Entity_Id);
699 -- This procedure sets the Is_Imported flag for the given entity,
700 -- checking that it is not previously exported or imported.
702 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
703 -- Mech is a parameter passing mechanism (see Import_Function syntax
704 -- for MECHANISM_NAME). This routine checks that the mechanism argument
705 -- has the right form, and if not issues an error message. If the
706 -- argument has the right form then the Mechanism field of Ent is
707 -- set appropriately.
709 procedure Set_Ravenscar_Profile (N : Node_Id);
710 -- Activate the set of configuration pragmas and restrictions that
711 -- make up the Ravenscar Profile. N is the corresponding pragma
712 -- node, which is used for error messages on any constructs
713 -- that violate the profile.
715 ---------------------
716 -- Ada_2005_Pragma --
717 ---------------------
719 procedure Ada_2005_Pragma is
721 if Ada_Version <= Ada_95 then
722 Check_Restriction (No_Implementation_Pragmas, N);
726 --------------------------
727 -- Check_Ada_83_Warning --
728 --------------------------
730 procedure Check_Ada_83_Warning is
732 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
733 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
735 end Check_Ada_83_Warning;
737 ---------------------
738 -- Check_Arg_Count --
739 ---------------------
741 procedure Check_Arg_Count (Required : Nat) is
743 if Arg_Count /= Required then
744 Error_Pragma ("wrong number of arguments for pragma%");
748 --------------------------------
749 -- Check_Arg_Is_External_Name --
750 --------------------------------
752 procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
753 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
756 if Nkind (Argx) = N_Identifier then
760 Analyze_And_Resolve (Argx, Standard_String);
762 if Is_OK_Static_Expression (Argx) then
765 elsif Etype (Argx) = Any_Type then
768 -- An interesting special case, if we have a string literal and
769 -- we are in Ada 83 mode, then we allow it even though it will
770 -- not be flagged as static. This allows expected Ada 83 mode
771 -- use of external names which are string literals, even though
772 -- technically these are not static in Ada 83.
774 elsif Ada_Version = Ada_83
775 and then Nkind (Argx) = N_String_Literal
779 -- Static expression that raises Constraint_Error. This has
780 -- already been flagged, so just exit from pragma processing.
782 elsif Is_Static_Expression (Argx) then
785 -- Here we have a real error (non-static expression)
788 Error_Msg_Name_1 := Pname;
790 ("argument for pragma% must be a identifier or " &
791 "static string expression!", Argx);
795 end Check_Arg_Is_External_Name;
797 -----------------------------
798 -- Check_Arg_Is_Identifier --
799 -----------------------------
801 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
802 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
804 if Nkind (Argx) /= N_Identifier then
806 ("argument for pragma% must be identifier", Argx);
808 end Check_Arg_Is_Identifier;
810 ----------------------------------
811 -- Check_Arg_Is_Integer_Literal --
812 ----------------------------------
814 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
815 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
817 if Nkind (Argx) /= N_Integer_Literal then
819 ("argument for pragma% must be integer literal", Argx);
821 end Check_Arg_Is_Integer_Literal;
823 -------------------------------------------
824 -- Check_Arg_Is_Library_Level_Local_Name --
825 -------------------------------------------
829 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
830 -- | library_unit_NAME
832 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
834 Check_Arg_Is_Local_Name (Arg);
836 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
837 and then Comes_From_Source (N)
840 ("argument for pragma% must be library level entity", Arg);
842 end Check_Arg_Is_Library_Level_Local_Name;
844 -----------------------------
845 -- Check_Arg_Is_Local_Name --
846 -----------------------------
850 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
851 -- | library_unit_NAME
853 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
854 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
859 if Nkind (Argx) not in N_Direct_Name
860 and then (Nkind (Argx) /= N_Attribute_Reference
861 or else Present (Expressions (Argx))
862 or else Nkind (Prefix (Argx)) /= N_Identifier)
863 and then (not Is_Entity_Name (Argx)
864 or else not Is_Compilation_Unit (Entity (Argx)))
866 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
869 if Is_Entity_Name (Argx)
870 and then Scope (Entity (Argx)) /= Current_Scope
873 ("pragma% argument must be in same declarative part", Arg);
875 end Check_Arg_Is_Local_Name;
877 ---------------------------------
878 -- Check_Arg_Is_Locking_Policy --
879 ---------------------------------
881 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
882 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
885 Check_Arg_Is_Identifier (Argx);
887 if not Is_Locking_Policy_Name (Chars (Argx)) then
889 ("& is not a valid locking policy name", Argx);
891 end Check_Arg_Is_Locking_Policy;
893 -------------------------
894 -- Check_Arg_Is_One_Of --
895 -------------------------
897 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
898 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
901 Check_Arg_Is_Identifier (Argx);
903 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
904 Error_Msg_Name_2 := N1;
905 Error_Msg_Name_3 := N2;
906 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
908 end Check_Arg_Is_One_Of;
910 procedure Check_Arg_Is_One_Of
912 N1, N2, N3 : Name_Id)
914 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
917 Check_Arg_Is_Identifier (Argx);
919 if Chars (Argx) /= N1
920 and then Chars (Argx) /= N2
921 and then Chars (Argx) /= N3
923 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
925 end Check_Arg_Is_One_Of;
927 procedure Check_Arg_Is_One_Of
929 N1, N2, N3, N4 : Name_Id)
931 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
934 Check_Arg_Is_Identifier (Argx);
936 if Chars (Argx) /= N1
937 and then Chars (Argx) /= N2
938 and then Chars (Argx) /= N3
939 and then Chars (Argx) /= N4
941 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
943 end Check_Arg_Is_One_Of;
945 ---------------------------------
946 -- Check_Arg_Is_Queuing_Policy --
947 ---------------------------------
949 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
950 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
953 Check_Arg_Is_Identifier (Argx);
955 if not Is_Queuing_Policy_Name (Chars (Argx)) then
957 ("& is not a valid queuing policy name", Argx);
959 end Check_Arg_Is_Queuing_Policy;
961 ------------------------------------
962 -- Check_Arg_Is_Static_Expression --
963 ------------------------------------
965 procedure Check_Arg_Is_Static_Expression
969 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
972 Analyze_And_Resolve (Argx, Typ);
974 if Is_OK_Static_Expression (Argx) then
977 elsif Etype (Argx) = Any_Type then
980 -- An interesting special case, if we have a string literal and
981 -- we are in Ada 83 mode, then we allow it even though it will
982 -- not be flagged as static. This allows the use of Ada 95
983 -- pragmas like Import in Ada 83 mode. They will of course be
984 -- flagged with warnings as usual, but will not cause errors.
986 elsif Ada_Version = Ada_83
987 and then Nkind (Argx) = N_String_Literal
991 -- Static expression that raises Constraint_Error. This has
992 -- already been flagged, so just exit from pragma processing.
994 elsif Is_Static_Expression (Argx) then
997 -- Finally, we have a real error
1000 Error_Msg_Name_1 := Pname;
1001 Flag_Non_Static_Expr
1002 ("argument for pragma% must be a static expression!", Argx);
1005 end Check_Arg_Is_Static_Expression;
1007 ---------------------------------
1008 -- Check_Arg_Is_String_Literal --
1009 ---------------------------------
1011 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
1012 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1014 if Nkind (Argx) /= N_String_Literal then
1016 ("argument for pragma% must be string literal", Argx);
1018 end Check_Arg_Is_String_Literal;
1020 ------------------------------------------
1021 -- Check_Arg_Is_Task_Dispatching_Policy --
1022 ------------------------------------------
1024 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
1025 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1028 Check_Arg_Is_Identifier (Argx);
1030 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
1032 ("& is not a valid task dispatching policy name", Argx);
1034 end Check_Arg_Is_Task_Dispatching_Policy;
1036 ---------------------
1037 -- Check_Arg_Order --
1038 ---------------------
1040 procedure Check_Arg_Order (Names : Name_List) is
1043 Highest_So_Far : Natural := 0;
1044 -- Highest index in Names seen do far
1048 for J in 1 .. Arg_Count loop
1049 if Chars (Arg) /= No_Name then
1050 for K in Names'Range loop
1051 if Chars (Arg) = Names (K) then
1052 if K < Highest_So_Far then
1053 Error_Msg_Name_1 := Pname;
1055 ("parameters out of order for pragma%", Arg);
1056 Error_Msg_Name_1 := Names (K);
1057 Error_Msg_Name_2 := Names (Highest_So_Far);
1058 Error_Msg_N ("\% must appear before %", Arg);
1062 Highest_So_Far := K;
1070 end Check_Arg_Order;
1072 --------------------------------
1073 -- Check_At_Least_N_Arguments --
1074 --------------------------------
1076 procedure Check_At_Least_N_Arguments (N : Nat) is
1078 if Arg_Count < N then
1079 Error_Pragma ("too few arguments for pragma%");
1081 end Check_At_Least_N_Arguments;
1083 -------------------------------
1084 -- Check_At_Most_N_Arguments --
1085 -------------------------------
1087 procedure Check_At_Most_N_Arguments (N : Nat) is
1090 if Arg_Count > N then
1092 for J in 1 .. N loop
1094 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
1097 end Check_At_Most_N_Arguments;
1099 ---------------------
1100 -- Check_Component --
1101 ---------------------
1103 procedure Check_Component (Comp : Node_Id) is
1105 if Nkind (Comp) = N_Component_Declaration then
1107 Sindic : constant Node_Id :=
1108 Subtype_Indication (Component_Definition (Comp));
1109 Typ : constant Entity_Id :=
1110 Etype (Defining_Identifier (Comp));
1112 if Nkind (Sindic) = N_Subtype_Indication then
1114 -- Ada 2005 (AI-216): If a component subtype is subject to
1115 -- a per-object constraint, then the component type shall
1116 -- be an Unchecked_Union.
1118 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
1120 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
1122 Error_Msg_N ("component subtype subject to per-object" &
1123 " constraint must be an Unchecked_Union", Comp);
1127 if Is_Controlled (Typ) then
1129 ("component of unchecked union cannot be controlled", Comp);
1131 elsif Has_Task (Typ) then
1133 ("component of unchecked union cannot have tasks", Comp);
1137 end Check_Component;
1139 ----------------------------------
1140 -- Check_Duplicated_Export_Name --
1141 ----------------------------------
1143 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
1144 String_Val : constant String_Id := Strval (Nam);
1147 -- We are only interested in the export case, and in the case of
1148 -- generics, it is the instance, not the template, that is the
1149 -- problem (the template will generate a warning in any case).
1151 if not Inside_A_Generic
1152 and then (Prag_Id = Pragma_Export
1154 Prag_Id = Pragma_Export_Procedure
1156 Prag_Id = Pragma_Export_Valued_Procedure
1158 Prag_Id = Pragma_Export_Function)
1160 for J in Externals.First .. Externals.Last loop
1161 if String_Equal (String_Val, Strval (Externals.Table (J))) then
1162 Error_Msg_Sloc := Sloc (Externals.Table (J));
1163 Error_Msg_N ("external name duplicates name given#", Nam);
1168 Externals.Append (Nam);
1170 end Check_Duplicated_Export_Name;
1172 -------------------------
1173 -- Check_First_Subtype --
1174 -------------------------
1176 procedure Check_First_Subtype (Arg : Node_Id) is
1177 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1179 if not Is_First_Subtype (Entity (Argx)) then
1181 ("pragma% cannot apply to subtype", Argx);
1183 end Check_First_Subtype;
1185 ---------------------------
1186 -- Check_In_Main_Program --
1187 ---------------------------
1189 procedure Check_In_Main_Program is
1190 P : constant Node_Id := Parent (N);
1193 -- Must be at in subprogram body
1195 if Nkind (P) /= N_Subprogram_Body then
1196 Error_Pragma ("% pragma allowed only in subprogram");
1198 -- Otherwise warn if obviously not main program
1200 elsif Present (Parameter_Specifications (Specification (P)))
1201 or else not Is_Compilation_Unit (Defining_Entity (P))
1203 Error_Msg_Name_1 := Pname;
1205 ("?pragma% is only effective in main program", N);
1207 end Check_In_Main_Program;
1209 ---------------------------------------
1210 -- Check_Interrupt_Or_Attach_Handler --
1211 ---------------------------------------
1213 procedure Check_Interrupt_Or_Attach_Handler is
1214 Arg1_X : constant Node_Id := Expression (Arg1);
1215 Handler_Proc, Proc_Scope : Entity_Id;
1220 if Prag_Id = Pragma_Interrupt_Handler then
1221 Check_Restriction (No_Dynamic_Attachment, N);
1224 Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
1225 Proc_Scope := Scope (Handler_Proc);
1227 -- On AAMP only, a pragma Interrupt_Handler is supported for
1228 -- nonprotected parameterless procedures.
1230 if not AAMP_On_Target
1231 or else Prag_Id = Pragma_Attach_Handler
1233 if Ekind (Proc_Scope) /= E_Protected_Type then
1235 ("argument of pragma% must be protected procedure", Arg1);
1238 if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
1239 Error_Pragma ("pragma% must be in protected definition");
1243 if not Is_Library_Level_Entity (Proc_Scope)
1244 or else (AAMP_On_Target
1245 and then not Is_Library_Level_Entity (Handler_Proc))
1248 ("argument for pragma% must be library level entity", Arg1);
1250 end Check_Interrupt_Or_Attach_Handler;
1252 -------------------------------------------
1253 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1254 -------------------------------------------
1256 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1265 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1268 elsif Nkind (P) = N_Package_Specification then
1271 elsif Nkind (P) = N_Block_Statement then
1274 -- Note: the following tests seem a little peculiar, because
1275 -- they test for bodies, but if we were in the statement part
1276 -- of the body, we would already have hit the handled statement
1277 -- sequence, so the only way we get here is by being in the
1278 -- declarative part of the body.
1280 elsif Nkind (P) = N_Subprogram_Body
1281 or else Nkind (P) = N_Package_Body
1282 or else Nkind (P) = N_Task_Body
1283 or else Nkind (P) = N_Entry_Body
1291 Error_Pragma ("pragma% is not in declarative part or package spec");
1292 end Check_Is_In_Decl_Part_Or_Package_Spec;
1294 -------------------------
1295 -- Check_No_Identifier --
1296 -------------------------
1298 procedure Check_No_Identifier (Arg : Node_Id) is
1300 if Chars (Arg) /= No_Name then
1301 Error_Pragma_Arg_Ident
1302 ("pragma% does not permit identifier& here", Arg);
1304 end Check_No_Identifier;
1306 --------------------------
1307 -- Check_No_Identifiers --
1308 --------------------------
1310 procedure Check_No_Identifiers is
1313 if Arg_Count > 0 then
1315 while Present (Arg_Node) loop
1316 Check_No_Identifier (Arg_Node);
1320 end Check_No_Identifiers;
1322 -------------------------------
1323 -- Check_Optional_Identifier --
1324 -------------------------------
1326 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1328 if Present (Arg) and then Chars (Arg) /= No_Name then
1329 if Chars (Arg) /= Id then
1330 Error_Msg_Name_1 := Pname;
1331 Error_Msg_Name_2 := Id;
1332 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1336 end Check_Optional_Identifier;
1338 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1340 Name_Buffer (1 .. Id'Length) := Id;
1341 Name_Len := Id'Length;
1342 Check_Optional_Identifier (Arg, Name_Find);
1343 end Check_Optional_Identifier;
1345 --------------------------------------
1346 -- Check_Precondition_Postcondition --
1347 --------------------------------------
1349 procedure Check_Precondition_Postcondition (In_Body : out Boolean) is
1355 if not Is_List_Member (N) then
1359 -- Record whether pragma is enabled
1361 Set_PPC_Enabled (N, Check_Enabled (Pname));
1363 -- Search prior declarations
1366 while Present (Prev (P)) loop
1368 PO := Original_Node (P);
1370 -- Skip past prior pragma
1372 if Nkind (PO) = N_Pragma then
1375 -- Skip stuff not coming from source
1377 elsif not Comes_From_Source (PO) then
1380 -- Here if we hit a subprogram declaration
1382 elsif Nkind (PO) = N_Subprogram_Declaration then
1383 S := Defining_Unit_Name (Specification (PO));
1385 -- Analyze the pragma unless it appears within a package spec,
1386 -- which is the case where we delay the analysis of the PPC
1387 -- until the end of the package declarations (for details,
1388 -- see Analyze_Package_Specification.Analyze_PPCs).
1390 if Ekind (Scope (S)) /= E_Package
1392 Ekind (Scope (S)) /= E_Generic_Package
1394 Analyze_PPC_In_Decl_Part (N, S);
1397 -- Chain spec PPC pragma to list for subprogram
1399 Set_Next_Pragma (N, Spec_PPC_List (S));
1400 Set_Spec_PPC_List (S, N);
1402 -- Return indicating spec case
1407 -- If we encounter any other declaration moving back, misplaced
1414 -- If we fall through loop, pragma is at start of list, so see if
1415 -- it is at the start of declarations of a subprogram body.
1417 if Nkind (Parent (N)) = N_Subprogram_Body
1418 and then List_Containing (N) = Declarations (Parent (N))
1423 -- If not, it was misplaced
1428 end Check_Precondition_Postcondition;
1430 -----------------------------
1431 -- Check_Static_Constraint --
1432 -----------------------------
1434 -- Note: for convenience in writing this procedure, in addition to
1435 -- the officially (i.e. by spec) allowed argument which is always
1436 -- a constraint, it also allows ranges and discriminant associations.
1437 -- Above is not clear ???
1439 procedure Check_Static_Constraint (Constr : Node_Id) is
1441 procedure Require_Static (E : Node_Id);
1442 -- Require given expression to be static expression
1444 --------------------
1445 -- Require_Static --
1446 --------------------
1448 procedure Require_Static (E : Node_Id) is
1450 if not Is_OK_Static_Expression (E) then
1451 Flag_Non_Static_Expr
1452 ("non-static constraint not allowed in Unchecked_Union!", E);
1457 -- Start of processing for Check_Static_Constraint
1460 case Nkind (Constr) is
1461 when N_Discriminant_Association =>
1462 Require_Static (Expression (Constr));
1465 Require_Static (Low_Bound (Constr));
1466 Require_Static (High_Bound (Constr));
1468 when N_Attribute_Reference =>
1469 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1470 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1472 when N_Range_Constraint =>
1473 Check_Static_Constraint (Range_Expression (Constr));
1475 when N_Index_Or_Discriminant_Constraint =>
1479 IDC := First (Constraints (Constr));
1480 while Present (IDC) loop
1481 Check_Static_Constraint (IDC);
1489 end Check_Static_Constraint;
1491 --------------------------------------
1492 -- Check_Valid_Configuration_Pragma --
1493 --------------------------------------
1495 -- A configuration pragma must appear in the context clause of a
1496 -- compilation unit, and only other pragmas may precede it. Note that
1497 -- the test also allows use in a configuration pragma file.
1499 procedure Check_Valid_Configuration_Pragma is
1501 if not Is_Configuration_Pragma then
1502 Error_Pragma ("incorrect placement for configuration pragma%");
1504 end Check_Valid_Configuration_Pragma;
1506 -------------------------------------
1507 -- Check_Valid_Library_Unit_Pragma --
1508 -------------------------------------
1510 procedure Check_Valid_Library_Unit_Pragma is
1512 Parent_Node : Node_Id;
1513 Unit_Name : Entity_Id;
1514 Unit_Kind : Node_Kind;
1515 Unit_Node : Node_Id;
1516 Sindex : Source_File_Index;
1519 if not Is_List_Member (N) then
1523 Plist := List_Containing (N);
1524 Parent_Node := Parent (Plist);
1526 if Parent_Node = Empty then
1529 -- Case of pragma appearing after a compilation unit. In this
1530 -- case it must have an argument with the corresponding name
1531 -- and must be part of the following pragmas of its parent.
1533 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1534 if Plist /= Pragmas_After (Parent_Node) then
1537 elsif Arg_Count = 0 then
1539 ("argument required if outside compilation unit");
1542 Check_No_Identifiers;
1543 Check_Arg_Count (1);
1544 Unit_Node := Unit (Parent (Parent_Node));
1545 Unit_Kind := Nkind (Unit_Node);
1547 Analyze (Expression (Arg1));
1549 if Unit_Kind = N_Generic_Subprogram_Declaration
1550 or else Unit_Kind = N_Subprogram_Declaration
1552 Unit_Name := Defining_Entity (Unit_Node);
1554 elsif Unit_Kind in N_Generic_Instantiation then
1555 Unit_Name := Defining_Entity (Unit_Node);
1558 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1561 if Chars (Unit_Name) /=
1562 Chars (Entity (Expression (Arg1)))
1565 ("pragma% argument is not current unit name", Arg1);
1568 if Ekind (Unit_Name) = E_Package
1569 and then Present (Renamed_Entity (Unit_Name))
1571 Error_Pragma ("pragma% not allowed for renamed package");
1575 -- Pragma appears other than after a compilation unit
1578 -- Here we check for the generic instantiation case and also
1579 -- for the case of processing a generic formal package. We
1580 -- detect these cases by noting that the Sloc on the node
1581 -- does not belong to the current compilation unit.
1583 Sindex := Source_Index (Current_Sem_Unit);
1585 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1586 Rewrite (N, Make_Null_Statement (Loc));
1589 -- If before first declaration, the pragma applies to the
1590 -- enclosing unit, and the name if present must be this name.
1592 elsif Is_Before_First_Decl (N, Plist) then
1593 Unit_Node := Unit_Declaration_Node (Current_Scope);
1594 Unit_Kind := Nkind (Unit_Node);
1596 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1599 elsif Unit_Kind = N_Subprogram_Body
1600 and then not Acts_As_Spec (Unit_Node)
1604 elsif Nkind (Parent_Node) = N_Package_Body then
1607 elsif Nkind (Parent_Node) = N_Package_Specification
1608 and then Plist = Private_Declarations (Parent_Node)
1612 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1613 or else Nkind (Parent_Node) =
1614 N_Generic_Subprogram_Declaration)
1615 and then Plist = Generic_Formal_Declarations (Parent_Node)
1619 elsif Arg_Count > 0 then
1620 Analyze (Expression (Arg1));
1622 if Entity (Expression (Arg1)) /= Current_Scope then
1624 ("name in pragma% must be enclosing unit", Arg1);
1627 -- It is legal to have no argument in this context
1633 -- Error if not before first declaration. This is because a
1634 -- library unit pragma argument must be the name of a library
1635 -- unit (RM 10.1.5(7)), but the only names permitted in this
1636 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1637 -- generic subprogram declarations or generic instantiations.
1641 ("pragma% misplaced, must be before first declaration");
1645 end Check_Valid_Library_Unit_Pragma;
1651 procedure Check_Variant (Variant : Node_Id) is
1652 Clist : constant Node_Id := Component_List (Variant);
1656 if not Is_Non_Empty_List (Component_Items (Clist)) then
1658 ("Unchecked_Union may not have empty component list",
1663 Comp := First (Component_Items (Clist));
1664 while Present (Comp) loop
1665 Check_Component (Comp);
1674 procedure Error_Pragma (Msg : String) is
1676 Error_Msg_Name_1 := Pname;
1677 Error_Msg_N (Msg, N);
1681 ----------------------
1682 -- Error_Pragma_Arg --
1683 ----------------------
1685 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1687 Error_Msg_Name_1 := Pname;
1688 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1690 end Error_Pragma_Arg;
1692 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1694 Error_Msg_Name_1 := Pname;
1695 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1696 Error_Pragma_Arg (Msg2, Arg);
1697 end Error_Pragma_Arg;
1699 ----------------------------
1700 -- Error_Pragma_Arg_Ident --
1701 ----------------------------
1703 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1705 Error_Msg_Name_1 := Pname;
1706 Error_Msg_N (Msg, Arg);
1708 end Error_Pragma_Arg_Ident;
1710 ----------------------
1711 -- Error_Pragma_Ref --
1712 ----------------------
1714 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id) is
1716 Error_Msg_Name_1 := Pname;
1717 Error_Msg_Sloc := Sloc (Ref);
1718 Error_Msg_NE (Msg, N, Ref);
1720 end Error_Pragma_Ref;
1722 ------------------------
1723 -- Find_Lib_Unit_Name --
1724 ------------------------
1726 function Find_Lib_Unit_Name return Entity_Id is
1728 -- Return inner compilation unit entity, for case of nested
1729 -- categorization pragmas. This happens in generic unit.
1731 if Nkind (Parent (N)) = N_Package_Specification
1732 and then Defining_Entity (Parent (N)) /= Current_Scope
1734 return Defining_Entity (Parent (N));
1736 return Current_Scope;
1738 end Find_Lib_Unit_Name;
1740 ----------------------------
1741 -- Find_Program_Unit_Name --
1742 ----------------------------
1744 procedure Find_Program_Unit_Name (Id : Node_Id) is
1745 Unit_Name : Entity_Id;
1746 Unit_Kind : Node_Kind;
1747 P : constant Node_Id := Parent (N);
1750 if Nkind (P) = N_Compilation_Unit then
1751 Unit_Kind := Nkind (Unit (P));
1753 if Unit_Kind = N_Subprogram_Declaration
1754 or else Unit_Kind = N_Package_Declaration
1755 or else Unit_Kind in N_Generic_Declaration
1757 Unit_Name := Defining_Entity (Unit (P));
1759 if Chars (Id) = Chars (Unit_Name) then
1760 Set_Entity (Id, Unit_Name);
1761 Set_Etype (Id, Etype (Unit_Name));
1763 Set_Etype (Id, Any_Type);
1765 ("cannot find program unit referenced by pragma%");
1769 Set_Etype (Id, Any_Type);
1770 Error_Pragma ("pragma% inapplicable to this unit");
1776 end Find_Program_Unit_Name;
1778 -----------------------------------------
1779 -- Find_Unique_Parameterless_Procedure --
1780 -----------------------------------------
1782 function Find_Unique_Parameterless_Procedure
1784 Arg : Node_Id) return Entity_Id
1786 Proc : Entity_Id := Empty;
1789 -- The body of this procedure needs some comments ???
1791 if not Is_Entity_Name (Name) then
1793 ("argument of pragma% must be entity name", Arg);
1795 elsif not Is_Overloaded (Name) then
1796 Proc := Entity (Name);
1798 if Ekind (Proc) /= E_Procedure
1799 or else Present (First_Formal (Proc)) then
1801 ("argument of pragma% must be parameterless procedure", Arg);
1806 Found : Boolean := False;
1808 Index : Interp_Index;
1811 Get_First_Interp (Name, Index, It);
1812 while Present (It.Nam) loop
1815 if Ekind (Proc) = E_Procedure
1816 and then No (First_Formal (Proc))
1820 Set_Entity (Name, Proc);
1821 Set_Is_Overloaded (Name, False);
1824 ("ambiguous handler name for pragma% ", Arg);
1828 Get_Next_Interp (Index, It);
1833 ("argument of pragma% must be parameterless procedure",
1836 Proc := Entity (Name);
1842 end Find_Unique_Parameterless_Procedure;
1844 -------------------------
1845 -- Gather_Associations --
1846 -------------------------
1848 procedure Gather_Associations
1850 Args : out Args_List)
1855 -- Initialize all parameters to Empty
1857 for J in Args'Range loop
1861 -- That's all we have to do if there are no argument associations
1863 if No (Pragma_Argument_Associations (N)) then
1867 -- Otherwise first deal with any positional parameters present
1869 Arg := First (Pragma_Argument_Associations (N));
1870 for Index in Args'Range loop
1871 exit when No (Arg) or else Chars (Arg) /= No_Name;
1872 Args (Index) := Expression (Arg);
1876 -- Positional parameters all processed, if any left, then we
1877 -- have too many positional parameters.
1879 if Present (Arg) and then Chars (Arg) = No_Name then
1881 ("too many positional associations for pragma%", Arg);
1884 -- Process named parameters if any are present
1886 while Present (Arg) loop
1887 if Chars (Arg) = No_Name then
1889 ("positional association cannot follow named association",
1893 for Index in Names'Range loop
1894 if Names (Index) = Chars (Arg) then
1895 if Present (Args (Index)) then
1897 ("duplicate argument association for pragma%", Arg);
1899 Args (Index) := Expression (Arg);
1904 if Index = Names'Last then
1905 Error_Msg_Name_1 := Pname;
1906 Error_Msg_N ("pragma% does not allow & argument", Arg);
1908 -- Check for possible misspelling
1910 for Index1 in Names'Range loop
1911 if Is_Bad_Spelling_Of
1912 (Chars (Arg), Names (Index1))
1914 Error_Msg_Name_1 := Names (Index1);
1915 Error_Msg_N ("\possible misspelling of%", Arg);
1927 end Gather_Associations;
1933 procedure GNAT_Pragma is
1935 Check_Restriction (No_Implementation_Pragmas, N);
1938 --------------------------
1939 -- Is_Before_First_Decl --
1940 --------------------------
1942 function Is_Before_First_Decl
1943 (Pragma_Node : Node_Id;
1944 Decls : List_Id) return Boolean
1946 Item : Node_Id := First (Decls);
1949 -- Only other pragmas can come before this pragma
1952 if No (Item) or else Nkind (Item) /= N_Pragma then
1955 elsif Item = Pragma_Node then
1961 end Is_Before_First_Decl;
1963 -----------------------------
1964 -- Is_Configuration_Pragma --
1965 -----------------------------
1967 -- A configuration pragma must appear in the context clause of a
1968 -- compilation unit, and only other pragmas may precede it. Note that
1969 -- the test below also permits use in a configuration pragma file.
1971 function Is_Configuration_Pragma return Boolean is
1972 Lis : constant List_Id := List_Containing (N);
1973 Par : constant Node_Id := Parent (N);
1977 -- If no parent, then we are in the configuration pragma file,
1978 -- so the placement is definitely appropriate.
1983 -- Otherwise we must be in the context clause of a compilation unit
1984 -- and the only thing allowed before us in the context list is more
1985 -- configuration pragmas.
1987 elsif Nkind (Par) = N_Compilation_Unit
1988 and then Context_Items (Par) = Lis
1995 elsif Nkind (Prg) /= N_Pragma then
2005 end Is_Configuration_Pragma;
2007 --------------------------
2008 -- Is_In_Context_Clause --
2009 --------------------------
2011 function Is_In_Context_Clause return Boolean is
2013 Parent_Node : Node_Id;
2016 if not Is_List_Member (N) then
2020 Plist := List_Containing (N);
2021 Parent_Node := Parent (Plist);
2023 if Parent_Node = Empty
2024 or else Nkind (Parent_Node) /= N_Compilation_Unit
2025 or else Context_Items (Parent_Node) /= Plist
2032 end Is_In_Context_Clause;
2034 ---------------------------------
2035 -- Is_Static_String_Expression --
2036 ---------------------------------
2038 function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
2039 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
2042 Analyze_And_Resolve (Argx);
2043 return Is_OK_Static_Expression (Argx)
2044 and then Nkind (Argx) = N_String_Literal;
2045 end Is_Static_String_Expression;
2047 ----------------------
2048 -- Pragma_Misplaced --
2049 ----------------------
2051 procedure Pragma_Misplaced is
2053 Error_Pragma ("incorrect placement of pragma%");
2054 end Pragma_Misplaced;
2056 ------------------------------------
2057 -- Process Atomic_Shared_Volatile --
2058 ------------------------------------
2060 procedure Process_Atomic_Shared_Volatile is
2067 procedure Set_Atomic (E : Entity_Id);
2068 -- Set given type as atomic, and if no explicit alignment was given,
2069 -- set alignment to unknown, since back end knows what the alignment
2070 -- requirements are for atomic arrays. Note: this step is necessary
2071 -- for derived types.
2077 procedure Set_Atomic (E : Entity_Id) is
2081 if not Has_Alignment_Clause (E) then
2082 Set_Alignment (E, Uint_0);
2086 -- Start of processing for Process_Atomic_Shared_Volatile
2089 Check_Ada_83_Warning;
2090 Check_No_Identifiers;
2091 Check_Arg_Count (1);
2092 Check_Arg_Is_Local_Name (Arg1);
2093 E_Id := Expression (Arg1);
2095 if Etype (E_Id) = Any_Type then
2100 D := Declaration_Node (E);
2104 if Rep_Item_Too_Early (E, N)
2106 Rep_Item_Too_Late (E, N)
2110 Check_First_Subtype (Arg1);
2113 if Prag_Id /= Pragma_Volatile then
2115 Set_Atomic (Underlying_Type (E));
2116 Set_Atomic (Base_Type (E));
2119 -- Attribute belongs on the base type. If the view of the type is
2120 -- currently private, it also belongs on the underlying type.
2122 Set_Is_Volatile (Base_Type (E));
2123 Set_Is_Volatile (Underlying_Type (E));
2125 Set_Treat_As_Volatile (E);
2126 Set_Treat_As_Volatile (Underlying_Type (E));
2128 elsif K = N_Object_Declaration
2129 or else (K = N_Component_Declaration
2130 and then Original_Record_Component (E) = E)
2132 if Rep_Item_Too_Late (E, N) then
2136 if Prag_Id /= Pragma_Volatile then
2139 -- If the object declaration has an explicit initialization, a
2140 -- temporary may have to be created to hold the expression, to
2141 -- ensure that access to the object remain atomic.
2143 if Nkind (Parent (E)) = N_Object_Declaration
2144 and then Present (Expression (Parent (E)))
2146 Set_Has_Delayed_Freeze (E);
2149 -- An interesting improvement here. If an object of type X
2150 -- is declared atomic, and the type X is not atomic, that's
2151 -- a pity, since it may not have appropriate alignment etc.
2152 -- We can rescue this in the special case where the object
2153 -- and type are in the same unit by just setting the type
2154 -- as atomic, so that the back end will process it as atomic.
2156 Utyp := Underlying_Type (Etype (E));
2159 and then Sloc (E) > No_Location
2160 and then Sloc (Utyp) > No_Location
2162 Get_Source_File_Index (Sloc (E)) =
2163 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
2165 Set_Is_Atomic (Underlying_Type (Etype (E)));
2169 Set_Is_Volatile (E);
2170 Set_Treat_As_Volatile (E);
2174 ("inappropriate entity for pragma%", Arg1);
2176 end Process_Atomic_Shared_Volatile;
2178 -------------------------------------------
2179 -- Process_Compile_Time_Warning_Or_Error --
2180 -------------------------------------------
2182 procedure Process_Compile_Time_Warning_Or_Error is
2183 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
2187 Check_Arg_Count (2);
2188 Check_No_Identifiers;
2189 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
2190 Analyze_And_Resolve (Arg1x, Standard_Boolean);
2192 if Compile_Time_Known_Value (Arg1x) then
2193 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
2195 Str : constant String_Id :=
2196 Strval (Get_Pragma_Arg (Arg2));
2197 Len : constant Int := String_Length (Str);
2202 Cent : constant Entity_Id :=
2203 Cunit_Entity (Current_Sem_Unit);
2205 Force : constant Boolean :=
2206 Prag_Id = Pragma_Compile_Time_Warning
2208 Is_Spec_Name (Unit_Name (Current_Sem_Unit))
2209 and then (Ekind (Cent) /= E_Package
2210 or else not In_Private_Part (Cent));
2211 -- Set True if this is the warning case, and we are in the
2212 -- visible part of a package spec, or in a subprogram spec,
2213 -- in which case we want to force the client to see the
2214 -- warning, even though it is not in the main unit.
2217 -- Loop through segments of message separated by line
2218 -- feeds. We output these segments as separate messages
2219 -- with continuation marks for all but the first.
2224 Error_Msg_Strlen := 0;
2226 -- Loop to copy characters from argument to error
2227 -- message string buffer.
2230 exit when Ptr > Len;
2231 CC := Get_String_Char (Str, Ptr);
2234 -- Ignore wide chars ??? else store character
2236 if In_Character_Range (CC) then
2237 C := Get_Character (CC);
2238 exit when C = ASCII.LF;
2239 Error_Msg_Strlen := Error_Msg_Strlen + 1;
2240 Error_Msg_String (Error_Msg_Strlen) := C;
2244 -- Here with one line ready to go
2246 Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning;
2248 -- If this is a warning in a spec, then we want clients
2249 -- to see the warning, so mark the message with the
2250 -- special sequence !! to force the warning. In the case
2251 -- of a package spec, we do not force this if we are in
2252 -- the private part of the spec.
2255 if Cont = False then
2256 Error_Msg_N ("<~!!", Arg1);
2259 Error_Msg_N ("\<~!!", Arg1);
2262 -- Error, rather than warning, or in a body, so we do not
2263 -- need to force visibility for client (error will be
2264 -- output in any case, and this is the situation in which
2265 -- we do not want a client to get a warning, since the
2266 -- warning is in the body or the spec private part.
2269 if Cont = False then
2270 Error_Msg_N ("<~", Arg1);
2273 Error_Msg_N ("\<~", Arg1);
2277 exit when Ptr > Len;
2282 end Process_Compile_Time_Warning_Or_Error;
2284 ------------------------
2285 -- Process_Convention --
2286 ------------------------
2288 procedure Process_Convention
2289 (C : out Convention_Id;
2295 Comp_Unit : Unit_Number_Type;
2297 procedure Set_Convention_From_Pragma (E : Entity_Id);
2298 -- Set convention in entity E, and also flag that the entity has a
2299 -- convention pragma. If entity is for a private or incomplete type,
2300 -- also set convention and flag on underlying type. This procedure
2301 -- also deals with the special case of C_Pass_By_Copy convention.
2303 --------------------------------
2304 -- Set_Convention_From_Pragma --
2305 --------------------------------
2307 procedure Set_Convention_From_Pragma (E : Entity_Id) is
2309 -- Ada 2005 (AI-430): Check invalid attempt to change convention
2310 -- for an overridden dispatching operation. Technically this is
2311 -- an amendment and should only be done in Ada 2005 mode. However,
2312 -- this is clearly a mistake, since the problem that is addressed
2313 -- by this AI is that there is a clear gap in the RM!
2315 if Is_Dispatching_Operation (E)
2316 and then Present (Overridden_Operation (E))
2317 and then C /= Convention (Overridden_Operation (E))
2320 ("cannot change convention for " &
2321 "overridden dispatching operation",
2325 -- Set the convention
2327 Set_Convention (E, C);
2328 Set_Has_Convention_Pragma (E);
2330 if Is_Incomplete_Or_Private_Type (E) then
2331 Set_Convention (Underlying_Type (E), C);
2332 Set_Has_Convention_Pragma (Underlying_Type (E), True);
2335 -- A class-wide type should inherit the convention of
2336 -- the specific root type (although this isn't specified
2337 -- clearly by the RM).
2339 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
2340 Set_Convention (Class_Wide_Type (E), C);
2343 -- If the entity is a record type, then check for special case of
2344 -- C_Pass_By_Copy, which is treated the same as C except that the
2345 -- special record flag is set. This convention is only permitted
2346 -- on record types (see AI95-00131).
2348 if Cname = Name_C_Pass_By_Copy then
2349 if Is_Record_Type (E) then
2350 Set_C_Pass_By_Copy (Base_Type (E));
2351 elsif Is_Incomplete_Or_Private_Type (E)
2352 and then Is_Record_Type (Underlying_Type (E))
2354 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
2357 ("C_Pass_By_Copy convention allowed only for record type",
2362 -- If the entity is a derived boolean type, check for the
2363 -- special case of convention C, C++, or Fortran, where we
2364 -- consider any nonzero value to represent true.
2366 if Is_Discrete_Type (E)
2367 and then Root_Type (Etype (E)) = Standard_Boolean
2373 C = Convention_Fortran)
2375 Set_Nonzero_Is_True (Base_Type (E));
2377 end Set_Convention_From_Pragma;
2379 -- Start of processing for Process_Convention
2382 Check_At_Least_N_Arguments (2);
2383 Check_Optional_Identifier (Arg1, Name_Convention);
2384 Check_Arg_Is_Identifier (Arg1);
2385 Cname := Chars (Expression (Arg1));
2387 -- C_Pass_By_Copy is treated as a synonym for convention C
2388 -- (this is tested again below to set the critical flag)
2390 if Cname = Name_C_Pass_By_Copy then
2393 -- Otherwise we must have something in the standard convention list
2395 elsif Is_Convention_Name (Cname) then
2396 C := Get_Convention_Id (Chars (Expression (Arg1)));
2398 -- In DEC VMS, it seems that there is an undocumented feature that
2399 -- any unrecognized convention is treated as the default, which for
2400 -- us is convention C. It does not seem so terrible to do this
2401 -- unconditionally, silently in the VMS case, and with a warning
2402 -- in the non-VMS case.
2405 if Warn_On_Export_Import and not OpenVMS_On_Target then
2407 ("?unrecognized convention name, C assumed",
2414 Check_Optional_Identifier (Arg2, Name_Entity);
2415 Check_Arg_Is_Local_Name (Arg2);
2417 Id := Expression (Arg2);
2420 if not Is_Entity_Name (Id) then
2421 Error_Pragma_Arg ("entity name required", Arg2);
2426 -- Go to renamed subprogram if present, since convention applies to
2427 -- the actual renamed entity, not to the renaming entity. If the
2428 -- subprogram is inherited, go to parent subprogram.
2430 if Is_Subprogram (E)
2431 and then Present (Alias (E))
2433 if Nkind (Parent (Declaration_Node (E))) =
2434 N_Subprogram_Renaming_Declaration
2436 if Scope (E) /= Scope (Alias (E)) then
2438 ("cannot apply pragma% to non-local renaming&#", E);
2442 elsif Nkind (Parent (E)) = N_Full_Type_Declaration
2443 and then Scope (E) = Scope (Alias (E))
2449 -- Check that we are not applying this to a specless body
2451 if Is_Subprogram (E)
2452 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2455 ("pragma% requires separate spec and must come before body");
2458 -- Check that we are not applying this to a named constant
2460 if Ekind (E) = E_Named_Integer
2462 Ekind (E) = E_Named_Real
2464 Error_Msg_Name_1 := Pname;
2466 ("cannot apply pragma% to named constant!",
2467 Get_Pragma_Arg (Arg2));
2469 ("\supply appropriate type for&!", Arg2);
2472 if Ekind (E) = E_Enumeration_Literal then
2473 Error_Pragma ("enumeration literal not allowed for pragma%");
2476 -- Check for rep item appearing too early or too late
2478 if Etype (E) = Any_Type
2479 or else Rep_Item_Too_Early (E, N)
2483 E := Underlying_Type (E);
2486 if Rep_Item_Too_Late (E, N) then
2490 if Has_Convention_Pragma (E) then
2492 ("at most one Convention/Export/Import pragma is allowed", Arg2);
2494 elsif Convention (E) = Convention_Protected
2495 or else Ekind (Scope (E)) = E_Protected_Type
2498 ("a protected operation cannot be given a different convention",
2502 -- For Intrinsic, a subprogram is required
2504 if C = Convention_Intrinsic
2505 and then not Is_Subprogram (E)
2506 and then not Is_Generic_Subprogram (E)
2509 ("second argument of pragma% must be a subprogram", Arg2);
2512 -- For Stdcall, a subprogram, variable or subprogram type is required
2514 if C = Convention_Stdcall
2515 and then not Is_Subprogram (E)
2516 and then not Is_Generic_Subprogram (E)
2517 and then Ekind (E) /= E_Variable
2520 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2523 ("second argument of pragma% must be subprogram (type)",
2527 if not Is_Subprogram (E)
2528 and then not Is_Generic_Subprogram (E)
2530 Set_Convention_From_Pragma (E);
2534 Check_First_Subtype (Arg2);
2535 Set_Convention_From_Pragma (Base_Type (E));
2537 -- For subprograms, we must set the convention on the
2538 -- internally generated directly designated type as well.
2540 if Ekind (E) = E_Access_Subprogram_Type then
2541 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2545 -- For the subprogram case, set proper convention for all homonyms
2546 -- in same scope and the same declarative part, i.e. the same
2547 -- compilation unit.
2550 Comp_Unit := Get_Source_Unit (E);
2551 Set_Convention_From_Pragma (E);
2553 -- Treat a pragma Import as an implicit body, for GPS use
2555 if Prag_Id = Pragma_Import then
2556 Generate_Reference (E, Id, 'b');
2562 exit when No (E1) or else Scope (E1) /= Current_Scope;
2564 -- Do not set the pragma on inherited operations or on
2565 -- formal subprograms.
2567 if Comes_From_Source (E1)
2568 and then Comp_Unit = Get_Source_Unit (E1)
2569 and then not Is_Formal_Subprogram (E1)
2570 and then Nkind (Original_Node (Parent (E1))) /=
2571 N_Full_Type_Declaration
2573 if Present (Alias (E1))
2574 and then Scope (E1) /= Scope (Alias (E1))
2577 ("cannot apply pragma% to non-local renaming&#", E1);
2579 Set_Convention_From_Pragma (E1);
2581 if Prag_Id = Pragma_Import then
2582 Generate_Reference (E, Id, 'b');
2587 end Process_Convention;
2589 -----------------------------------------------------
2590 -- Process_Extended_Import_Export_Exception_Pragma --
2591 -----------------------------------------------------
2593 procedure Process_Extended_Import_Export_Exception_Pragma
2594 (Arg_Internal : Node_Id;
2595 Arg_External : Node_Id;
2605 if not OpenVMS_On_Target then
2607 ("?pragma% ignored (applies only to Open'V'M'S)");
2610 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2611 Def_Id := Entity (Arg_Internal);
2613 if Ekind (Def_Id) /= E_Exception then
2615 ("pragma% must refer to declared exception", Arg_Internal);
2618 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2620 if Present (Arg_Form) then
2621 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2624 if Present (Arg_Form)
2625 and then Chars (Arg_Form) = Name_Ada
2629 Set_Is_VMS_Exception (Def_Id);
2630 Set_Exception_Code (Def_Id, No_Uint);
2633 if Present (Arg_Code) then
2634 if not Is_VMS_Exception (Def_Id) then
2636 ("Code option for pragma% not allowed for Ada case",
2640 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2641 Code_Val := Expr_Value (Arg_Code);
2643 if not UI_Is_In_Int_Range (Code_Val) then
2645 ("Code option for pragma% must be in 32-bit range",
2649 Set_Exception_Code (Def_Id, Code_Val);
2652 end Process_Extended_Import_Export_Exception_Pragma;
2654 -------------------------------------------------
2655 -- Process_Extended_Import_Export_Internal_Arg --
2656 -------------------------------------------------
2658 procedure Process_Extended_Import_Export_Internal_Arg
2659 (Arg_Internal : Node_Id := Empty)
2664 if No (Arg_Internal) then
2665 Error_Pragma ("Internal parameter required for pragma%");
2668 if Nkind (Arg_Internal) = N_Identifier then
2671 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2672 and then (Prag_Id = Pragma_Import_Function
2674 Prag_Id = Pragma_Export_Function)
2680 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2683 Check_Arg_Is_Local_Name (Arg_Internal);
2684 end Process_Extended_Import_Export_Internal_Arg;
2686 --------------------------------------------------
2687 -- Process_Extended_Import_Export_Object_Pragma --
2688 --------------------------------------------------
2690 procedure Process_Extended_Import_Export_Object_Pragma
2691 (Arg_Internal : Node_Id;
2692 Arg_External : Node_Id;
2698 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2699 Def_Id := Entity (Arg_Internal);
2701 if Ekind (Def_Id) /= E_Constant
2702 and then Ekind (Def_Id) /= E_Variable
2705 ("pragma% must designate an object", Arg_Internal);
2708 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2710 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2713 ("previous Common/Psect_Object applies, pragma % not permitted",
2717 if Rep_Item_Too_Late (Def_Id, N) then
2721 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2723 if Present (Arg_Size) then
2724 Check_Arg_Is_External_Name (Arg_Size);
2727 -- Export_Object case
2729 if Prag_Id = Pragma_Export_Object then
2730 if not Is_Library_Level_Entity (Def_Id) then
2732 ("argument for pragma% must be library level entity",
2736 if Ekind (Current_Scope) = E_Generic_Package then
2737 Error_Pragma ("pragma& cannot appear in a generic unit");
2740 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2742 ("exported object must have compile time known size",
2746 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2748 ("?duplicate Export_Object pragma", N);
2750 Set_Exported (Def_Id, Arg_Internal);
2753 -- Import_Object case
2756 if Is_Concurrent_Type (Etype (Def_Id)) then
2758 ("cannot use pragma% for task/protected object",
2762 if Ekind (Def_Id) = E_Constant then
2764 ("cannot import a constant", Arg_Internal);
2767 if Warn_On_Export_Import
2768 and then Has_Discriminants (Etype (Def_Id))
2771 ("imported value must be initialized?", Arg_Internal);
2774 if Warn_On_Export_Import
2775 and then Is_Access_Type (Etype (Def_Id))
2778 ("cannot import object of an access type?", Arg_Internal);
2781 if Warn_On_Export_Import
2782 and then Is_Imported (Def_Id)
2785 ("?duplicate Import_Object pragma", N);
2787 -- Check for explicit initialization present. Note that an
2788 -- initialization that generated by the code generator, e.g.
2789 -- for an access type, does not count here.
2791 elsif Present (Expression (Parent (Def_Id)))
2794 (Original_Node (Expression (Parent (Def_Id))))
2796 Error_Msg_Sloc := Sloc (Def_Id);
2798 ("imported entities cannot be initialized (RM B.1(24))",
2799 "\no initialization allowed for & declared#", Arg1);
2801 Set_Imported (Def_Id);
2802 Note_Possible_Modification (Arg_Internal, Sure => False);
2805 end Process_Extended_Import_Export_Object_Pragma;
2807 ------------------------------------------------------
2808 -- Process_Extended_Import_Export_Subprogram_Pragma --
2809 ------------------------------------------------------
2811 procedure Process_Extended_Import_Export_Subprogram_Pragma
2812 (Arg_Internal : Node_Id;
2813 Arg_External : Node_Id;
2814 Arg_Parameter_Types : Node_Id;
2815 Arg_Result_Type : Node_Id := Empty;
2816 Arg_Mechanism : Node_Id;
2817 Arg_Result_Mechanism : Node_Id := Empty;
2818 Arg_First_Optional_Parameter : Node_Id := Empty)
2824 Ambiguous : Boolean;
2828 function Same_Base_Type
2830 Formal : Entity_Id) return Boolean;
2831 -- Determines if Ptype references the type of Formal. Note that
2832 -- only the base types need to match according to the spec. Ptype
2833 -- here is the argument from the pragma, which is either a type
2834 -- name, or an access attribute.
2836 --------------------
2837 -- Same_Base_Type --
2838 --------------------
2840 function Same_Base_Type
2842 Formal : Entity_Id) return Boolean
2844 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2848 -- Case where pragma argument is typ'Access
2850 if Nkind (Ptype) = N_Attribute_Reference
2851 and then Attribute_Name (Ptype) = Name_Access
2853 Pref := Prefix (Ptype);
2856 if not Is_Entity_Name (Pref)
2857 or else Entity (Pref) = Any_Type
2862 -- We have a match if the corresponding argument is of an
2863 -- anonymous access type, and its designated type matches
2864 -- the type of the prefix of the access attribute
2866 return Ekind (Ftyp) = E_Anonymous_Access_Type
2867 and then Base_Type (Entity (Pref)) =
2868 Base_Type (Etype (Designated_Type (Ftyp)));
2870 -- Case where pragma argument is a type name
2875 if not Is_Entity_Name (Ptype)
2876 or else Entity (Ptype) = Any_Type
2881 -- We have a match if the corresponding argument is of
2882 -- the type given in the pragma (comparing base types)
2884 return Base_Type (Entity (Ptype)) = Ftyp;
2888 -- Start of processing for
2889 -- Process_Extended_Import_Export_Subprogram_Pragma
2892 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2896 -- Loop through homonyms (overloadings) of the entity
2898 Hom_Id := Entity (Arg_Internal);
2899 while Present (Hom_Id) loop
2900 Def_Id := Get_Base_Subprogram (Hom_Id);
2902 -- We need a subprogram in the current scope
2904 if not Is_Subprogram (Def_Id)
2905 or else Scope (Def_Id) /= Current_Scope
2912 -- Pragma cannot apply to subprogram body
2914 if Is_Subprogram (Def_Id)
2917 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2920 ("pragma% requires separate spec"
2921 & " and must come before body");
2924 -- Test result type if given, note that the result type
2925 -- parameter can only be present for the function cases.
2927 if Present (Arg_Result_Type)
2928 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2932 elsif Etype (Def_Id) /= Standard_Void_Type
2934 (Pname = Name_Export_Procedure
2936 Pname = Name_Import_Procedure)
2940 -- Test parameter types if given. Note that this parameter
2941 -- has not been analyzed (and must not be, since it is
2942 -- semantic nonsense), so we get it as the parser left it.
2944 elsif Present (Arg_Parameter_Types) then
2945 Check_Matching_Types : declare
2950 Formal := First_Formal (Def_Id);
2952 if Nkind (Arg_Parameter_Types) = N_Null then
2953 if Present (Formal) then
2957 -- A list of one type, e.g. (List) is parsed as
2958 -- a parenthesized expression.
2960 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2961 and then Paren_Count (Arg_Parameter_Types) = 1
2964 or else Present (Next_Formal (Formal))
2969 Same_Base_Type (Arg_Parameter_Types, Formal);
2972 -- A list of more than one type is parsed as a aggregate
2974 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2975 and then Paren_Count (Arg_Parameter_Types) = 0
2977 Ptype := First (Expressions (Arg_Parameter_Types));
2978 while Present (Ptype) or else Present (Formal) loop
2981 or else not Same_Base_Type (Ptype, Formal)
2986 Next_Formal (Formal);
2991 -- Anything else is of the wrong form
2995 ("wrong form for Parameter_Types parameter",
2996 Arg_Parameter_Types);
2998 end Check_Matching_Types;
3001 -- Match is now False if the entry we found did not match
3002 -- either a supplied Parameter_Types or Result_Types argument
3008 -- Ambiguous case, the flag Ambiguous shows if we already
3009 -- detected this and output the initial messages.
3012 if not Ambiguous then
3014 Error_Msg_Name_1 := Pname;
3016 ("pragma% does not uniquely identify subprogram!",
3018 Error_Msg_Sloc := Sloc (Ent);
3019 Error_Msg_N ("matching subprogram #!", N);
3023 Error_Msg_Sloc := Sloc (Def_Id);
3024 Error_Msg_N ("matching subprogram #!", N);
3029 Hom_Id := Homonym (Hom_Id);
3032 -- See if we found an entry
3035 if not Ambiguous then
3036 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
3038 ("pragma% cannot be given for generic subprogram");
3041 ("pragma% does not identify local subprogram");
3048 -- Import pragmas must be be for imported entities
3050 if Prag_Id = Pragma_Import_Function
3052 Prag_Id = Pragma_Import_Procedure
3054 Prag_Id = Pragma_Import_Valued_Procedure
3056 if not Is_Imported (Ent) then
3058 ("pragma Import or Interface must precede pragma%");
3061 -- Here we have the Export case which can set the entity as exported
3063 -- But does not do so if the specified external name is null, since
3064 -- that is taken as a signal in DEC Ada 83 (with which we want to be
3065 -- compatible) to request no external name.
3067 elsif Nkind (Arg_External) = N_String_Literal
3068 and then String_Length (Strval (Arg_External)) = 0
3072 -- In all other cases, set entity as exported
3075 Set_Exported (Ent, Arg_Internal);
3078 -- Special processing for Valued_Procedure cases
3080 if Prag_Id = Pragma_Import_Valued_Procedure
3082 Prag_Id = Pragma_Export_Valued_Procedure
3084 Formal := First_Formal (Ent);
3088 ("at least one parameter required for pragma%");
3090 elsif Ekind (Formal) /= E_Out_Parameter then
3092 ("first parameter must have mode out for pragma%");
3095 Set_Is_Valued_Procedure (Ent);
3099 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
3101 -- Process Result_Mechanism argument if present. We have already
3102 -- checked that this is only allowed for the function case.
3104 if Present (Arg_Result_Mechanism) then
3105 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
3108 -- Process Mechanism parameter if present. Note that this parameter
3109 -- is not analyzed, and must not be analyzed since it is semantic
3110 -- nonsense, so we get it in exactly as the parser left it.
3112 if Present (Arg_Mechanism) then
3120 -- A single mechanism association without a formal parameter
3121 -- name is parsed as a parenthesized expression. All other
3122 -- cases are parsed as aggregates, so we rewrite the single
3123 -- parameter case as an aggregate for consistency.
3125 if Nkind (Arg_Mechanism) /= N_Aggregate
3126 and then Paren_Count (Arg_Mechanism) = 1
3128 Rewrite (Arg_Mechanism,
3129 Make_Aggregate (Sloc (Arg_Mechanism),
3130 Expressions => New_List (
3131 Relocate_Node (Arg_Mechanism))));
3134 -- Case of only mechanism name given, applies to all formals
3136 if Nkind (Arg_Mechanism) /= N_Aggregate then
3137 Formal := First_Formal (Ent);
3138 while Present (Formal) loop
3139 Set_Mechanism_Value (Formal, Arg_Mechanism);
3140 Next_Formal (Formal);
3143 -- Case of list of mechanism associations given
3146 if Null_Record_Present (Arg_Mechanism) then
3148 ("inappropriate form for Mechanism parameter",
3152 -- Deal with positional ones first
3154 Formal := First_Formal (Ent);
3156 if Present (Expressions (Arg_Mechanism)) then
3157 Mname := First (Expressions (Arg_Mechanism));
3158 while Present (Mname) loop
3161 ("too many mechanism associations", Mname);
3164 Set_Mechanism_Value (Formal, Mname);
3165 Next_Formal (Formal);
3170 -- Deal with named entries
3172 if Present (Component_Associations (Arg_Mechanism)) then
3173 Massoc := First (Component_Associations (Arg_Mechanism));
3174 while Present (Massoc) loop
3175 Choice := First (Choices (Massoc));
3177 if Nkind (Choice) /= N_Identifier
3178 or else Present (Next (Choice))
3181 ("incorrect form for mechanism association",
3185 Formal := First_Formal (Ent);
3189 ("parameter name & not present", Choice);
3192 if Chars (Choice) = Chars (Formal) then
3194 (Formal, Expression (Massoc));
3198 Next_Formal (Formal);
3208 -- Process First_Optional_Parameter argument if present. We have
3209 -- already checked that this is only allowed for the Import case.
3211 if Present (Arg_First_Optional_Parameter) then
3212 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
3214 ("first optional parameter must be formal parameter name",
3215 Arg_First_Optional_Parameter);
3218 Formal := First_Formal (Ent);
3222 ("specified formal parameter& not found",
3223 Arg_First_Optional_Parameter);
3226 exit when Chars (Formal) =
3227 Chars (Arg_First_Optional_Parameter);
3229 Next_Formal (Formal);
3232 Set_First_Optional_Parameter (Ent, Formal);
3234 -- Check specified and all remaining formals have right form
3236 while Present (Formal) loop
3237 if Ekind (Formal) /= E_In_Parameter then
3239 ("optional formal& is not of mode in!",
3240 Arg_First_Optional_Parameter, Formal);
3243 Dval := Default_Value (Formal);
3247 ("optional formal& does not have default value!",
3248 Arg_First_Optional_Parameter, Formal);
3250 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
3255 ("default value for optional formal& is non-static!",
3256 Arg_First_Optional_Parameter, Formal);
3260 Set_Is_Optional_Parameter (Formal);
3261 Next_Formal (Formal);
3264 end Process_Extended_Import_Export_Subprogram_Pragma;
3266 --------------------------
3267 -- Process_Generic_List --
3268 --------------------------
3270 procedure Process_Generic_List is
3276 Check_No_Identifiers;
3277 Check_At_Least_N_Arguments (1);
3280 while Present (Arg) loop
3281 Exp := Expression (Arg);
3284 if not Is_Entity_Name (Exp)
3286 (not Is_Generic_Instance (Entity (Exp))
3288 not Is_Generic_Unit (Entity (Exp)))
3291 ("pragma% argument must be name of generic unit/instance",
3297 end Process_Generic_List;
3299 ---------------------------------
3300 -- Process_Import_Or_Interface --
3301 ---------------------------------
3303 procedure Process_Import_Or_Interface is
3309 Process_Convention (C, Def_Id);
3310 Kill_Size_Check_Code (Def_Id);
3311 Note_Possible_Modification (Expression (Arg2), Sure => False);
3313 if Ekind (Def_Id) = E_Variable
3315 Ekind (Def_Id) = E_Constant
3317 -- We do not permit Import to apply to a renaming declaration
3319 if Present (Renamed_Object (Def_Id)) then
3321 ("pragma% not allowed for object renaming", Arg2);
3323 -- User initialization is not allowed for imported object, but
3324 -- the object declaration may contain a default initialization,
3325 -- that will be discarded. Note that an explicit initialization
3326 -- only counts if it comes from source, otherwise it is simply
3327 -- the code generator making an implicit initialization explicit.
3329 elsif Present (Expression (Parent (Def_Id)))
3330 and then Comes_From_Source (Expression (Parent (Def_Id)))
3332 Error_Msg_Sloc := Sloc (Def_Id);
3334 ("no initialization allowed for declaration of& #",
3335 "\imported entities cannot be initialized (RM B.1(24))",
3339 Set_Imported (Def_Id);
3340 Process_Interface_Name (Def_Id, Arg3, Arg4);
3342 -- Note that we do not set Is_Public here. That's because we
3343 -- only want to set if if there is no address clause, and we
3344 -- don't know that yet, so we delay that processing till
3347 -- pragma Import completes deferred constants
3349 if Ekind (Def_Id) = E_Constant then
3350 Set_Has_Completion (Def_Id);
3353 -- It is not possible to import a constant of an unconstrained
3354 -- array type (e.g. string) because there is no simple way to
3355 -- write a meaningful subtype for it.
3357 if Is_Array_Type (Etype (Def_Id))
3358 and then not Is_Constrained (Etype (Def_Id))
3361 ("imported constant& must have a constrained subtype",
3366 elsif Is_Subprogram (Def_Id)
3367 or else Is_Generic_Subprogram (Def_Id)
3369 -- If the name is overloaded, pragma applies to all of the
3370 -- denoted entities in the same declarative part.
3373 while Present (Hom_Id) loop
3374 Def_Id := Get_Base_Subprogram (Hom_Id);
3376 -- Ignore inherited subprograms because the pragma will
3377 -- apply to the parent operation, which is the one called.
3379 if Is_Overloadable (Def_Id)
3380 and then Present (Alias (Def_Id))
3384 -- If it is not a subprogram, it must be in an outer
3385 -- scope and pragma does not apply.
3387 elsif not Is_Subprogram (Def_Id)
3388 and then not Is_Generic_Subprogram (Def_Id)
3392 -- Verify that the homonym is in the same declarative
3393 -- part (not just the same scope).
3395 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
3396 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
3401 Set_Imported (Def_Id);
3403 -- Special processing for Convention_Intrinsic
3405 if C = Convention_Intrinsic then
3407 -- Link_Name argument not allowed for intrinsic
3410 and then Chars (Arg3) = Name_Link_Name
3415 if Present (Arg4) then
3417 ("Link_Name argument not allowed for " &
3422 Set_Is_Intrinsic_Subprogram (Def_Id);
3424 -- If no external name is present, then check that
3425 -- this is a valid intrinsic subprogram. If an external
3426 -- name is present, then this is handled by the back end.
3429 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
3433 -- All interfaced procedures need an external symbol
3434 -- created for them since they are always referenced
3435 -- from another object file.
3437 Set_Is_Public (Def_Id);
3439 -- Verify that the subprogram does not have a completion
3440 -- through a renaming declaration. For other completions
3441 -- the pragma appears as a too late representation.
3444 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3448 and then Nkind (Decl) = N_Subprogram_Declaration
3449 and then Present (Corresponding_Body (Decl))
3452 (Unit_Declaration_Node
3453 (Corresponding_Body (Decl))) =
3454 N_Subprogram_Renaming_Declaration
3456 Error_Msg_Sloc := Sloc (Def_Id);
3458 ("cannot import&, renaming already provided for " &
3459 "declaration #", N, Def_Id);
3463 Set_Has_Completion (Def_Id);
3464 Process_Interface_Name (Def_Id, Arg3, Arg4);
3467 if Is_Compilation_Unit (Hom_Id) then
3469 -- Its possible homonyms are not affected by the pragma.
3470 -- Such homonyms might be present in the context of other
3471 -- units being compiled.
3476 Hom_Id := Homonym (Hom_Id);
3480 -- When the convention is Java or CIL, we also allow Import to be
3481 -- given for packages, generic packages, exceptions, and record
3484 elsif (C = Convention_Java or else C = Convention_CIL)
3486 (Ekind (Def_Id) = E_Package
3487 or else Ekind (Def_Id) = E_Generic_Package
3488 or else Ekind (Def_Id) = E_Exception
3489 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3491 Set_Imported (Def_Id);
3492 Set_Is_Public (Def_Id);
3493 Process_Interface_Name (Def_Id, Arg3, Arg4);
3495 -- Import a CPP class
3497 elsif Is_Record_Type (Def_Id)
3498 and then C = Convention_CPP
3500 if not Is_Tagged_Type (Def_Id) then
3501 Error_Msg_Sloc := Sloc (Def_Id);
3502 Error_Pragma_Arg ("imported 'C'P'P type must be tagged", Arg2);
3505 -- Types treated as CPP classes are treated as limited, but we
3506 -- don't require them to be declared this way. A warning is
3507 -- issued to encourage the user to declare them as limited.
3508 -- This is not an error, for compatibility reasons, because
3509 -- these types have been supported this way for some time.
3511 if not Is_Limited_Type (Def_Id) then
3513 ("imported 'C'P'P type should be " &
3514 "explicitly declared limited?",
3515 Get_Pragma_Arg (Arg2));
3517 ("\type will be considered limited",
3518 Get_Pragma_Arg (Arg2));
3521 Set_Is_CPP_Class (Def_Id);
3522 Set_Is_Limited_Record (Def_Id);
3527 ("second argument of pragma% must be object or subprogram",
3531 -- If this pragma applies to a compilation unit, then the unit,
3532 -- which is a subprogram, does not require (or allow) a body.
3533 -- We also do not need to elaborate imported procedures.
3535 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3537 Cunit : constant Node_Id := Parent (Parent (N));
3539 Set_Body_Required (Cunit, False);
3542 end Process_Import_Or_Interface;
3544 --------------------
3545 -- Process_Inline --
3546 --------------------
3548 procedure Process_Inline (Active : Boolean) is
3554 Effective : Boolean := False;
3556 procedure Make_Inline (Subp : Entity_Id);
3557 -- Subp is the defining unit name of the subprogram
3558 -- declaration. Set the flag, as well as the flag in the
3559 -- corresponding body, if there is one present.
3561 procedure Set_Inline_Flags (Subp : Entity_Id);
3562 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp and also
3563 -- Has_Pragma_Inline_Always for the Inline_Always case.
3565 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3566 -- Returns True if it can be determined at this stage that inlining
3567 -- is not possible, for example if the body is available and contains
3568 -- exception handlers, we prevent inlining, since otherwise we can
3569 -- get undefined symbols at link time. This function also emits a
3570 -- warning if front-end inlining is enabled and the pragma appears
3573 -- ??? is business with link symbols still valid, or does it relate
3574 -- to front end ZCX which is being phased out ???
3576 ---------------------------
3577 -- Inlining_Not_Possible --
3578 ---------------------------
3580 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3581 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3585 if Nkind (Decl) = N_Subprogram_Body then
3586 Stats := Handled_Statement_Sequence (Decl);
3587 return Present (Exception_Handlers (Stats))
3588 or else Present (At_End_Proc (Stats));
3590 elsif Nkind (Decl) = N_Subprogram_Declaration
3591 and then Present (Corresponding_Body (Decl))
3593 if Front_End_Inlining
3594 and then Analyzed (Corresponding_Body (Decl))
3596 Error_Msg_N ("pragma appears too late, ignored?", N);
3599 -- If the subprogram is a renaming as body, the body is
3600 -- just a call to the renamed subprogram, and inlining is
3601 -- trivially possible.
3604 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
3605 N_Subprogram_Renaming_Declaration
3611 Handled_Statement_Sequence
3612 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3615 Present (Exception_Handlers (Stats))
3616 or else Present (At_End_Proc (Stats));
3620 -- If body is not available, assume the best, the check is
3621 -- performed again when compiling enclosing package bodies.
3625 end Inlining_Not_Possible;
3631 procedure Make_Inline (Subp : Entity_Id) is
3632 Kind : constant Entity_Kind := Ekind (Subp);
3633 Inner_Subp : Entity_Id := Subp;
3636 -- Ignore if bad type, avoid cascaded error
3638 if Etype (Subp) = Any_Type then
3642 -- Ignore if all inlining is suppressed
3644 elsif Suppress_All_Inlining then
3648 -- If inlining is not possible, for now do not treat as an error
3650 elsif Inlining_Not_Possible (Subp) then
3654 -- Here we have a candidate for inlining, but we must exclude
3655 -- derived operations. Otherwise we would end up trying to inline
3656 -- a phantom declaration, and the result would be to drag in a
3657 -- body which has no direct inlining associated with it. That
3658 -- would not only be inefficient but would also result in the
3659 -- backend doing cross-unit inlining in cases where it was
3660 -- definitely inappropriate to do so.
3662 -- However, a simple Comes_From_Source test is insufficient, since
3663 -- we do want to allow inlining of generic instances which also do
3664 -- not come from source. We also need to recognize specs
3665 -- generated by the front-end for bodies that carry the pragma.
3666 -- Finally, predefined operators do not come from source but are
3667 -- not inlineable either.
3669 elsif Is_Generic_Instance (Subp)
3670 or else Nkind (Parent (Parent (Subp))) = N_Subprogram_Declaration
3674 elsif not Comes_From_Source (Subp)
3675 and then Scope (Subp) /= Standard_Standard
3681 -- The referenced entity must either be the enclosing entity,
3682 -- or an entity declared within the current open scope.
3684 if Present (Scope (Subp))
3685 and then Scope (Subp) /= Current_Scope
3686 and then Subp /= Current_Scope
3689 ("argument of% must be entity in current scope", Assoc);
3693 -- Processing for procedure, operator or function.
3694 -- If subprogram is aliased (as for an instance) indicate
3695 -- that the renamed entity (if declared in the same unit)
3698 if Is_Subprogram (Subp) then
3699 while Present (Alias (Inner_Subp)) loop
3700 Inner_Subp := Alias (Inner_Subp);
3703 if In_Same_Source_Unit (Subp, Inner_Subp) then
3704 Set_Inline_Flags (Inner_Subp);
3706 Decl := Parent (Parent (Inner_Subp));
3708 if Nkind (Decl) = N_Subprogram_Declaration
3709 and then Present (Corresponding_Body (Decl))
3711 Set_Inline_Flags (Corresponding_Body (Decl));
3717 -- For a generic subprogram set flag as well, for use at
3718 -- the point of instantiation, to determine whether the
3719 -- body should be generated.
3721 elsif Is_Generic_Subprogram (Subp) then
3722 Set_Inline_Flags (Subp);
3725 -- Literals are by definition inlined
3727 elsif Kind = E_Enumeration_Literal then
3730 -- Anything else is an error
3734 ("expect subprogram name for pragma%", Assoc);
3738 ----------------------
3739 -- Set_Inline_Flags --
3740 ----------------------
3742 procedure Set_Inline_Flags (Subp : Entity_Id) is
3745 Set_Is_Inlined (Subp, True);
3748 if not Has_Pragma_Inline (Subp) then
3749 Set_Has_Pragma_Inline (Subp);
3753 if Prag_Id = Pragma_Inline_Always then
3754 Set_Has_Pragma_Inline_Always (Subp);
3756 end Set_Inline_Flags;
3758 -- Start of processing for Process_Inline
3761 Check_No_Identifiers;
3762 Check_At_Least_N_Arguments (1);
3765 Inline_Processing_Required := True;
3769 while Present (Assoc) loop
3770 Subp_Id := Expression (Assoc);
3774 if Is_Entity_Name (Subp_Id) then
3775 Subp := Entity (Subp_Id);
3777 if Subp = Any_Id then
3779 -- If previous error, avoid cascaded errors
3787 while Present (Homonym (Subp))
3788 and then Scope (Homonym (Subp)) = Current_Scope
3790 Make_Inline (Homonym (Subp));
3791 Subp := Homonym (Subp);
3798 ("inappropriate argument for pragma%", Assoc);
3801 and then Warn_On_Redundant_Constructs
3802 and then not Suppress_All_Inlining
3804 if Inlining_Not_Possible (Subp) then
3806 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
3809 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
3817 ----------------------------
3818 -- Process_Interface_Name --
3819 ----------------------------
3821 procedure Process_Interface_Name
3822 (Subprogram_Def : Entity_Id;
3828 String_Val : String_Id;
3830 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3831 -- SN is a string literal node for an interface name. This routine
3832 -- performs some minimal checks that the name is reasonable. In
3833 -- particular that no spaces or other obviously incorrect characters
3834 -- appear. This is only a warning, since any characters are allowed.
3836 ----------------------------------
3837 -- Check_Form_Of_Interface_Name --
3838 ----------------------------------
3840 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3841 S : constant String_Id := Strval (Expr_Value_S (SN));
3842 SL : constant Nat := String_Length (S);
3847 Error_Msg_N ("interface name cannot be null string", SN);
3850 for J in 1 .. SL loop
3851 C := Get_String_Char (S, J);
3853 if Warn_On_Export_Import
3855 (not In_Character_Range (C)
3856 or else (Get_Character (C) = ' '
3857 and then VM_Target /= CLI_Target)
3858 or else Get_Character (C) = ',')
3861 ("?interface name contains illegal character", SN);
3864 end Check_Form_Of_Interface_Name;
3866 -- Start of processing for Process_Interface_Name
3869 if No (Link_Arg) then
3870 if No (Ext_Arg) then
3871 if VM_Target = CLI_Target
3872 and then Ekind (Subprogram_Def) = E_Package
3873 and then Nkind (Parent (Subprogram_Def)) =
3874 N_Package_Specification
3875 and then Present (Generic_Parent (Parent (Subprogram_Def)))
3880 (Generic_Parent (Parent (Subprogram_Def))));
3885 elsif Chars (Ext_Arg) = Name_Link_Name then
3887 Link_Nam := Expression (Ext_Arg);
3890 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3891 Ext_Nam := Expression (Ext_Arg);
3896 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3897 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3898 Ext_Nam := Expression (Ext_Arg);
3899 Link_Nam := Expression (Link_Arg);
3902 -- Check expressions for external name and link name are static
3904 if Present (Ext_Nam) then
3905 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3906 Check_Form_Of_Interface_Name (Ext_Nam);
3908 -- Verify that the external name is not the name of a local
3909 -- entity, which would hide the imported one and lead to
3910 -- run-time surprises. The problem can only arise for entities
3911 -- declared in a package body (otherwise the external name is
3912 -- fully qualified and won't conflict).
3920 if Prag_Id = Pragma_Import then
3921 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3923 E := Entity_Id (Get_Name_Table_Info (Nam));
3925 if Nam /= Chars (Subprogram_Def)
3926 and then Present (E)
3927 and then not Is_Overloadable (E)
3928 and then Is_Immediately_Visible (E)
3929 and then not Is_Imported (E)
3930 and then Ekind (Scope (E)) = E_Package
3933 while Present (Par) loop
3934 if Nkind (Par) = N_Package_Body then
3935 Error_Msg_Sloc := Sloc (E);
3937 ("imported entity is hidden by & declared#",
3942 Par := Parent (Par);
3949 if Present (Link_Nam) then
3950 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3951 Check_Form_Of_Interface_Name (Link_Nam);
3954 -- If there is no link name, just set the external name
3956 if No (Link_Nam) then
3957 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
3959 -- For the Link_Name case, the given literal is preceded by an
3960 -- asterisk, which indicates to GCC that the given name should
3961 -- be taken literally, and in particular that no prepending of
3962 -- underlines should occur, even in systems where this is the
3968 if VM_Target = No_VM then
3969 Store_String_Char (Get_Char_Code ('*'));
3972 String_Val := Strval (Expr_Value_S (Link_Nam));
3973 Store_String_Chars (String_Val);
3975 Make_String_Literal (Sloc (Link_Nam),
3976 Strval => End_String);
3979 Set_Encoded_Interface_Name
3980 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3981 Check_Duplicated_Export_Name (Link_Nam);
3982 end Process_Interface_Name;
3984 -----------------------------------------
3985 -- Process_Interrupt_Or_Attach_Handler --
3986 -----------------------------------------
3988 procedure Process_Interrupt_Or_Attach_Handler is
3989 Arg1_X : constant Node_Id := Expression (Arg1);
3990 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3991 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3994 Set_Is_Interrupt_Handler (Handler_Proc);
3996 -- If the pragma is not associated with a handler procedure
3997 -- within a protected type, then it must be for a nonprotected
3998 -- procedure for the AAMP target, in which case we don't
3999 -- associate a representation item with the procedure's scope.
4001 if Ekind (Proc_Scope) = E_Protected_Type then
4002 if Prag_Id = Pragma_Interrupt_Handler
4004 Prag_Id = Pragma_Attach_Handler
4006 Record_Rep_Item (Proc_Scope, N);
4009 end Process_Interrupt_Or_Attach_Handler;
4011 --------------------------------------------------
4012 -- Process_Restrictions_Or_Restriction_Warnings --
4013 --------------------------------------------------
4015 -- Note: some of the simple identifier cases were handled in par-prag,
4016 -- but it is harmless (and more straightforward) to simply handle all
4017 -- cases here, even if it means we repeat a bit of work in some cases.
4019 procedure Process_Restrictions_Or_Restriction_Warnings
4023 R_Id : Restriction_Id;
4028 procedure Check_Unit_Name (N : Node_Id);
4029 -- Checks unit name parameter for No_Dependence. Returns if it has
4030 -- an appropriate form, otherwise raises pragma argument error.
4032 ---------------------
4033 -- Check_Unit_Name --
4034 ---------------------
4036 procedure Check_Unit_Name (N : Node_Id) is
4038 if Nkind (N) = N_Selected_Component then
4039 Check_Unit_Name (Prefix (N));
4040 Check_Unit_Name (Selector_Name (N));
4042 elsif Nkind (N) = N_Identifier then
4047 ("wrong form for unit name for No_Dependence", N);
4049 end Check_Unit_Name;
4051 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
4054 Check_Ada_83_Warning;
4055 Check_At_Least_N_Arguments (1);
4056 Check_Valid_Configuration_Pragma;
4059 while Present (Arg) loop
4061 Expr := Expression (Arg);
4063 -- Case of no restriction identifier present
4065 if Id = No_Name then
4066 if Nkind (Expr) /= N_Identifier then
4068 ("invalid form for restriction", Arg);
4073 (Process_Restriction_Synonyms (Expr));
4075 if R_Id not in All_Boolean_Restrictions then
4076 Error_Msg_Name_1 := Pname;
4078 ("invalid restriction identifier&", Get_Pragma_Arg (Arg));
4080 -- Check for possible misspelling
4082 for J in Restriction_Id loop
4084 Rnm : constant String := Restriction_Id'Image (J);
4087 Name_Buffer (1 .. Rnm'Length) := Rnm;
4088 Name_Len := Rnm'Length;
4089 Set_Casing (All_Lower_Case);
4091 if Is_Bad_Spelling_Of (Chars (Expr), Name_Enter) then
4093 (Identifier_Casing (Current_Source_File));
4094 Error_Msg_String (1 .. Rnm'Length) :=
4095 Name_Buffer (1 .. Name_Len);
4096 Error_Msg_Strlen := Rnm'Length;
4098 ("\possible misspelling of ""~""",
4099 Get_Pragma_Arg (Arg));
4108 if Implementation_Restriction (R_Id) then
4109 Check_Restriction (No_Implementation_Restrictions, Arg);
4112 -- If this is a warning, then set the warning unless we already
4113 -- have a real restriction active (we never want a warning to
4114 -- override a real restriction).
4117 if not Restriction_Active (R_Id) then
4118 Set_Restriction (R_Id, N);
4119 Restriction_Warnings (R_Id) := True;
4122 -- If real restriction case, then set it and make sure that the
4123 -- restriction warning flag is off, since a real restriction
4124 -- always overrides a warning.
4127 Set_Restriction (R_Id, N);
4128 Restriction_Warnings (R_Id) := False;
4131 -- A very special case that must be processed here: pragma
4132 -- Restrictions (No_Exceptions) turns off all run-time
4133 -- checking. This is a bit dubious in terms of the formal
4134 -- language definition, but it is what is intended by RM
4135 -- H.4(12). Restriction_Warnings never affects generated code
4136 -- so this is done only in the real restriction case.
4138 if R_Id = No_Exceptions and then not Warn then
4139 Scope_Suppress := (others => True);
4142 -- Case of No_Dependence => unit-name. Note that the parser
4143 -- already made the necessary entry in the No_Dependence table.
4145 elsif Id = Name_No_Dependence then
4146 Check_Unit_Name (Expr);
4148 -- All other cases of restriction identifier present
4151 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
4152 Analyze_And_Resolve (Expr, Any_Integer);
4154 if R_Id not in All_Parameter_Restrictions then
4156 ("invalid restriction parameter identifier", Arg);
4158 elsif not Is_OK_Static_Expression (Expr) then
4159 Flag_Non_Static_Expr
4160 ("value must be static expression!", Expr);
4163 elsif not Is_Integer_Type (Etype (Expr))
4164 or else Expr_Value (Expr) < 0
4167 ("value must be non-negative integer", Arg);
4170 -- Restriction pragma is active
4172 Val := Expr_Value (Expr);
4174 if not UI_Is_In_Int_Range (Val) then
4176 ("pragma ignored, value too large?", Arg);
4179 -- Warning case. If the real restriction is active, then we
4180 -- ignore the request, since warning never overrides a real
4181 -- restriction. Otherwise we set the proper warning. Note that
4182 -- this circuit sets the warning again if it is already set,
4183 -- which is what we want, since the constant may have changed.
4186 if not Restriction_Active (R_Id) then
4188 (R_Id, N, Integer (UI_To_Int (Val)));
4189 Restriction_Warnings (R_Id) := True;
4192 -- Real restriction case, set restriction and make sure warning
4193 -- flag is off since real restriction always overrides warning.
4196 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
4197 Restriction_Warnings (R_Id) := False;
4203 end Process_Restrictions_Or_Restriction_Warnings;
4205 ---------------------------------
4206 -- Process_Suppress_Unsuppress --
4207 ---------------------------------
4209 -- Note: this procedure makes entries in the check suppress data
4210 -- structures managed by Sem. See spec of package Sem for full
4211 -- details on how we handle recording of check suppression.
4213 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
4218 In_Package_Spec : constant Boolean :=
4219 (Ekind (Current_Scope) = E_Package
4221 Ekind (Current_Scope) = E_Generic_Package)
4222 and then not In_Package_Body (Current_Scope);
4224 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
4225 -- Used to suppress a single check on the given entity
4227 --------------------------------
4228 -- Suppress_Unsuppress_Echeck --
4229 --------------------------------
4231 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
4233 Set_Checks_May_Be_Suppressed (E);
4235 if In_Package_Spec then
4236 Push_Global_Suppress_Stack_Entry
4239 Suppress => Suppress_Case);
4242 Push_Local_Suppress_Stack_Entry
4245 Suppress => Suppress_Case);
4248 -- If this is a first subtype, and the base type is distinct,
4249 -- then also set the suppress flags on the base type.
4251 if Is_First_Subtype (E)
4252 and then Etype (E) /= E
4254 Suppress_Unsuppress_Echeck (Etype (E), C);
4256 end Suppress_Unsuppress_Echeck;
4258 -- Start of processing for Process_Suppress_Unsuppress
4261 -- Suppress/Unsuppress can appear as a configuration pragma,
4262 -- or in a declarative part or a package spec (RM 11.5(5))
4264 if not Is_Configuration_Pragma then
4265 Check_Is_In_Decl_Part_Or_Package_Spec;
4268 Check_At_Least_N_Arguments (1);
4269 Check_At_Most_N_Arguments (2);
4270 Check_No_Identifier (Arg1);
4271 Check_Arg_Is_Identifier (Arg1);
4273 C := Get_Check_Id (Chars (Expression (Arg1)));
4275 if C = No_Check_Id then
4277 ("argument of pragma% is not valid check name", Arg1);
4280 if not Suppress_Case
4281 and then (C = All_Checks or else C = Overflow_Check)
4283 Opt.Overflow_Checks_Unsuppressed := True;
4286 if Arg_Count = 1 then
4288 -- Make an entry in the local scope suppress table. This is the
4289 -- table that directly shows the current value of the scope
4290 -- suppress check for any check id value.
4292 if C = All_Checks then
4294 -- For All_Checks, we set all specific predefined checks with
4295 -- the exception of Elaboration_Check, which is handled
4296 -- specially because of not wanting All_Checks to have the
4297 -- effect of deactivating static elaboration order processing.
4299 for J in Scope_Suppress'Range loop
4300 if J /= Elaboration_Check then
4301 Scope_Suppress (J) := Suppress_Case;
4305 -- If not All_Checks, and predefined check, then set appropriate
4306 -- scope entry. Note that we will set Elaboration_Check if this
4307 -- is explicitly specified.
4309 elsif C in Predefined_Check_Id then
4310 Scope_Suppress (C) := Suppress_Case;
4313 -- Also make an entry in the Local_Entity_Suppress table
4315 Push_Local_Suppress_Stack_Entry
4318 Suppress => Suppress_Case);
4320 -- Case of two arguments present, where the check is suppressed for
4321 -- a specified entity (given as the second argument of the pragma)
4324 Check_Optional_Identifier (Arg2, Name_On);
4325 E_Id := Expression (Arg2);
4328 if not Is_Entity_Name (E_Id) then
4330 ("second argument of pragma% must be entity name", Arg2);
4339 -- Enforce RM 11.5(7) which requires that for a pragma that
4340 -- appears within a package spec, the named entity must be
4341 -- within the package spec. We allow the package name itself
4342 -- to be mentioned since that makes sense, although it is not
4343 -- strictly allowed by 11.5(7).
4346 and then E /= Current_Scope
4347 and then Scope (E) /= Current_Scope
4350 ("entity in pragma% is not in package spec (RM 11.5(7))",
4354 -- Loop through homonyms. As noted below, in the case of a package
4355 -- spec, only homonyms within the package spec are considered.
4358 Suppress_Unsuppress_Echeck (E, C);
4360 if Is_Generic_Instance (E)
4361 and then Is_Subprogram (E)
4362 and then Present (Alias (E))
4364 Suppress_Unsuppress_Echeck (Alias (E), C);
4367 -- Move to next homonym
4372 -- If we are within a package specification, the
4373 -- pragma only applies to homonyms in the same scope.
4375 exit when In_Package_Spec
4376 and then Scope (E) /= Current_Scope;
4379 end Process_Suppress_Unsuppress;
4385 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
4387 if Is_Imported (E) then
4389 ("cannot export entity& that was previously imported", Arg);
4391 elsif Present (Address_Clause (E)) then
4393 ("cannot export entity& that has an address clause", Arg);
4396 Set_Is_Exported (E);
4398 -- Generate a reference for entity explicitly, because the
4399 -- identifier may be overloaded and name resolution will not
4402 Generate_Reference (E, Arg);
4404 -- Deal with exporting non-library level entity
4406 if not Is_Library_Level_Entity (E) then
4408 -- Not allowed at all for subprograms
4410 if Is_Subprogram (E) then
4411 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
4413 -- Otherwise set public and statically allocated
4417 Set_Is_Statically_Allocated (E);
4419 -- Warn if the corresponding W flag is set and the pragma
4420 -- comes from source. The latter may not be true e.g. on
4421 -- VMS where we expand export pragmas for exception codes
4422 -- associated with imported or exported exceptions. We do
4423 -- not want to generate a warning for something that the
4424 -- user did not write.
4426 if Warn_On_Export_Import
4427 and then Comes_From_Source (Arg)
4430 ("?& has been made static as a result of Export", Arg, E);
4432 ("\this usage is non-standard and non-portable", Arg);
4437 if Warn_On_Export_Import and then Is_Type (E) then
4439 ("exporting a type has no effect?", Arg, E);
4442 if Warn_On_Export_Import and Inside_A_Generic then
4444 ("all instances of& will have the same external name?", Arg, E);
4448 ----------------------------------------------
4449 -- Set_Extended_Import_Export_External_Name --
4450 ----------------------------------------------
4452 procedure Set_Extended_Import_Export_External_Name
4453 (Internal_Ent : Entity_Id;
4454 Arg_External : Node_Id)
4456 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
4460 if No (Arg_External) then
4464 Check_Arg_Is_External_Name (Arg_External);
4466 if Nkind (Arg_External) = N_String_Literal then
4467 if String_Length (Strval (Arg_External)) = 0 then
4470 New_Name := Adjust_External_Name_Case (Arg_External);
4473 elsif Nkind (Arg_External) = N_Identifier then
4474 New_Name := Get_Default_External_Name (Arg_External);
4476 -- Check_Arg_Is_External_Name should let through only
4477 -- identifiers and string literals or static string
4478 -- expressions (which are folded to string literals).
4481 raise Program_Error;
4484 -- If we already have an external name set (by a prior normal
4485 -- Import or Export pragma), then the external names must match
4487 if Present (Interface_Name (Internal_Ent)) then
4488 Check_Matching_Internal_Names : declare
4489 S1 : constant String_Id := Strval (Old_Name);
4490 S2 : constant String_Id := Strval (New_Name);
4493 -- Called if names do not match
4499 procedure Mismatch is
4501 Error_Msg_Sloc := Sloc (Old_Name);
4503 ("external name does not match that given #",
4507 -- Start of processing for Check_Matching_Internal_Names
4510 if String_Length (S1) /= String_Length (S2) then
4514 for J in 1 .. String_Length (S1) loop
4515 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
4520 end Check_Matching_Internal_Names;
4522 -- Otherwise set the given name
4525 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
4526 Check_Duplicated_Export_Name (New_Name);
4528 end Set_Extended_Import_Export_External_Name;
4534 procedure Set_Imported (E : Entity_Id) is
4536 -- Error message if already imported or exported
4538 if Is_Exported (E) or else Is_Imported (E) then
4539 if Is_Exported (E) then
4540 Error_Msg_NE ("entity& was previously exported", N, E);
4542 Error_Msg_NE ("entity& was previously imported", N, E);
4545 Error_Msg_Name_1 := Pname;
4547 ("\(pragma% applies to all previous entities)", N);
4549 Error_Msg_Sloc := Sloc (E);
4550 Error_Msg_NE ("\import not allowed for& declared#", N, E);
4552 -- Here if not previously imported or exported, OK to import
4555 Set_Is_Imported (E);
4557 -- If the entity is an object that is not at the library
4558 -- level, then it is statically allocated. We do not worry
4559 -- about objects with address clauses in this context since
4560 -- they are not really imported in the linker sense.
4563 and then not Is_Library_Level_Entity (E)
4564 and then No (Address_Clause (E))
4566 Set_Is_Statically_Allocated (E);
4571 -------------------------
4572 -- Set_Mechanism_Value --
4573 -------------------------
4575 -- Note: the mechanism name has not been analyzed (and cannot indeed
4576 -- be analyzed, since it is semantic nonsense), so we get it in the
4577 -- exact form created by the parser.
4579 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
4583 procedure Bad_Class;
4584 -- Signal bad descriptor class name
4586 procedure Bad_Mechanism;
4587 -- Signal bad mechanism name
4593 procedure Bad_Class is
4595 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
4598 -------------------------
4599 -- Bad_Mechanism_Value --
4600 -------------------------
4602 procedure Bad_Mechanism is
4604 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
4607 -- Start of processing for Set_Mechanism_Value
4610 if Mechanism (Ent) /= Default_Mechanism then
4612 ("mechanism for & has already been set", Mech_Name, Ent);
4615 -- MECHANISM_NAME ::= value | reference | descriptor
4617 if Nkind (Mech_Name) = N_Identifier then
4618 if Chars (Mech_Name) = Name_Value then
4619 Set_Mechanism (Ent, By_Copy);
4622 elsif Chars (Mech_Name) = Name_Reference then
4623 Set_Mechanism (Ent, By_Reference);
4626 elsif Chars (Mech_Name) = Name_Descriptor then
4627 Check_VMS (Mech_Name);
4628 Set_Mechanism (Ent, By_Descriptor);
4631 elsif Chars (Mech_Name) = Name_Copy then
4633 ("bad mechanism name, Value assumed", Mech_Name);
4639 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
4640 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4642 -- Note: this form is parsed as an indexed component
4644 elsif Nkind (Mech_Name) = N_Indexed_Component then
4645 Class := First (Expressions (Mech_Name));
4647 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4648 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
4649 or else Present (Next (Class))
4654 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
4655 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4657 -- Note: this form is parsed as a function call
4659 elsif Nkind (Mech_Name) = N_Function_Call then
4661 Param := First (Parameter_Associations (Mech_Name));
4663 if Nkind (Name (Mech_Name)) /= N_Identifier
4664 or else Chars (Name (Mech_Name)) /= Name_Descriptor
4665 or else Present (Next (Param))
4666 or else No (Selector_Name (Param))
4667 or else Chars (Selector_Name (Param)) /= Name_Class
4671 Class := Explicit_Actual_Parameter (Param);
4678 -- Fall through here with Class set to descriptor class name
4680 Check_VMS (Mech_Name);
4682 if Nkind (Class) /= N_Identifier then
4685 elsif Chars (Class) = Name_UBS then
4686 Set_Mechanism (Ent, By_Descriptor_UBS);
4688 elsif Chars (Class) = Name_UBSB then
4689 Set_Mechanism (Ent, By_Descriptor_UBSB);
4691 elsif Chars (Class) = Name_UBA then
4692 Set_Mechanism (Ent, By_Descriptor_UBA);
4694 elsif Chars (Class) = Name_S then
4695 Set_Mechanism (Ent, By_Descriptor_S);
4697 elsif Chars (Class) = Name_SB then
4698 Set_Mechanism (Ent, By_Descriptor_SB);
4700 elsif Chars (Class) = Name_A then
4701 Set_Mechanism (Ent, By_Descriptor_A);
4703 elsif Chars (Class) = Name_NCA then
4704 Set_Mechanism (Ent, By_Descriptor_NCA);
4709 end Set_Mechanism_Value;
4711 ---------------------------
4712 -- Set_Ravenscar_Profile --
4713 ---------------------------
4715 -- The tasks to be done here are
4717 -- Set required policies
4719 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4720 -- pragma Locking_Policy (Ceiling_Locking)
4722 -- Set Detect_Blocking mode
4724 -- Set required restrictions (see System.Rident for detailed list)
4726 procedure Set_Ravenscar_Profile (N : Node_Id) is
4728 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4730 if Task_Dispatching_Policy /= ' '
4731 and then Task_Dispatching_Policy /= 'F'
4733 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
4734 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4736 -- Set the FIFO_Within_Priorities policy, but always preserve
4737 -- System_Location since we like the error message with the run time
4741 Task_Dispatching_Policy := 'F';
4743 if Task_Dispatching_Policy_Sloc /= System_Location then
4744 Task_Dispatching_Policy_Sloc := Loc;
4748 -- pragma Locking_Policy (Ceiling_Locking)
4750 if Locking_Policy /= ' '
4751 and then Locking_Policy /= 'C'
4753 Error_Msg_Sloc := Locking_Policy_Sloc;
4754 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4756 -- Set the Ceiling_Locking policy, but preserve System_Location since
4757 -- we like the error message with the run time name.
4760 Locking_Policy := 'C';
4762 if Locking_Policy_Sloc /= System_Location then
4763 Locking_Policy_Sloc := Loc;
4767 -- pragma Detect_Blocking
4769 Detect_Blocking := True;
4771 -- Set the corresponding restrictions
4773 Set_Profile_Restrictions (Ravenscar, N, Warn => False);
4774 end Set_Ravenscar_Profile;
4776 -- Start of processing for Analyze_Pragma
4779 -- Deal with unrecognized pragma
4781 if not Is_Pragma_Name (Pname) then
4782 if Warn_On_Unrecognized_Pragma then
4783 Error_Msg_Name_1 := Pname;
4784 Error_Msg_N ("?unrecognized pragma%!", Pragma_Identifier (N));
4786 for PN in First_Pragma_Name .. Last_Pragma_Name loop
4787 if Is_Bad_Spelling_Of (Pname, PN) then
4788 Error_Msg_Name_1 := PN;
4790 ("\?possible misspelling of %!", Pragma_Identifier (N));
4799 -- Here to start processing for recognized pragma
4801 Prag_Id := Get_Pragma_Id (Pname);
4810 if Present (Pragma_Argument_Associations (N)) then
4811 Arg1 := First (Pragma_Argument_Associations (N));
4813 if Present (Arg1) then
4814 Arg2 := Next (Arg1);
4816 if Present (Arg2) then
4817 Arg3 := Next (Arg2);
4819 if Present (Arg3) then
4820 Arg4 := Next (Arg3);
4826 -- Count number of arguments
4833 while Present (Arg_Node) loop
4834 Arg_Count := Arg_Count + 1;
4839 -- An enumeration type defines the pragmas that are supported by the
4840 -- implementation. Get_Pragma_Id (in package Prag) transforms a name
4841 -- into the corresponding enumeration value for the following case.
4849 -- pragma Abort_Defer;
4851 when Pragma_Abort_Defer =>
4853 Check_Arg_Count (0);
4855 -- The only required semantic processing is to check the
4856 -- placement. This pragma must appear at the start of the
4857 -- statement sequence of a handled sequence of statements.
4859 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
4860 or else N /= First (Statements (Parent (N)))
4871 -- Note: this pragma also has some specific processing in Par.Prag
4872 -- because we want to set the Ada version mode during parsing.
4874 when Pragma_Ada_83 =>
4876 Check_Arg_Count (0);
4878 -- We really should check unconditionally for proper configuration
4879 -- pragma placement, since we really don't want mixed Ada modes
4880 -- within a single unit, and the GNAT reference manual has always
4881 -- said this was a configuration pragma, but we did not check and
4882 -- are hesitant to add the check now.
4884 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
4885 -- or Ada 95, so we must check if we are in Ada 2005 mode.
4887 if Ada_Version >= Ada_05 then
4888 Check_Valid_Configuration_Pragma;
4891 -- Now set Ada 83 mode
4893 Ada_Version := Ada_83;
4894 Ada_Version_Explicit := Ada_Version;
4902 -- Note: this pragma also has some specific processing in Par.Prag
4903 -- because we want to set the Ada 83 version mode during parsing.
4905 when Pragma_Ada_95 =>
4907 Check_Arg_Count (0);
4909 -- We really should check unconditionally for proper configuration
4910 -- pragma placement, since we really don't want mixed Ada modes
4911 -- within a single unit, and the GNAT reference manual has always
4912 -- said this was a configuration pragma, but we did not check and
4913 -- are hesitant to add the check now.
4915 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
4916 -- or Ada 95, so we must check if we are in Ada 2005 mode.
4918 if Ada_Version >= Ada_05 then
4919 Check_Valid_Configuration_Pragma;
4922 -- Now set Ada 95 mode
4924 Ada_Version := Ada_95;
4925 Ada_Version_Explicit := Ada_Version;
4927 ---------------------
4928 -- Ada_05/Ada_2005 --
4929 ---------------------
4932 -- pragma Ada_05 (LOCAL_NAME);
4935 -- pragma Ada_2005 (LOCAL_NAME):
4937 -- Note: these pragma also have some specific processing in Par.Prag
4938 -- because we want to set the Ada 2005 version mode during parsing.
4940 when Pragma_Ada_05 | Pragma_Ada_2005 => declare
4946 if Arg_Count = 1 then
4947 Check_Arg_Is_Local_Name (Arg1);
4948 E_Id := Expression (Arg1);
4950 if Etype (E_Id) = Any_Type then
4954 Set_Is_Ada_2005_Only (Entity (E_Id));
4957 Check_Arg_Count (0);
4959 -- For Ada_2005 we unconditionally enforce the documented
4960 -- configuration pragma placement, since we do not want to
4961 -- tolerate mixed modes in a unit involving Ada 2005. That
4962 -- would cause real difficulties for those cases where there
4963 -- are incompatibilities between Ada 95 and Ada 2005.
4965 Check_Valid_Configuration_Pragma;
4967 -- Now set Ada 2005 mode
4969 Ada_Version := Ada_05;
4970 Ada_Version_Explicit := Ada_05;
4974 ----------------------
4975 -- All_Calls_Remote --
4976 ----------------------
4978 -- pragma All_Calls_Remote [(library_package_NAME)];
4980 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
4981 Lib_Entity : Entity_Id;
4984 Check_Ada_83_Warning;
4985 Check_Valid_Library_Unit_Pragma;
4987 if Nkind (N) = N_Null_Statement then
4991 Lib_Entity := Find_Lib_Unit_Name;
4993 -- This pragma should only apply to a RCI unit (RM E.2.3(23))
4995 if Present (Lib_Entity)
4996 and then not Debug_Flag_U
4998 if not Is_Remote_Call_Interface (Lib_Entity) then
4999 Error_Pragma ("pragma% only apply to rci unit");
5001 -- Set flag for entity of the library unit
5004 Set_Has_All_Calls_Remote (Lib_Entity);
5008 end All_Calls_Remote;
5014 -- pragma Annotate (IDENTIFIER {, ARG});
5015 -- ARG ::= NAME | EXPRESSION
5017 when Pragma_Annotate => Annotate : begin
5019 Check_At_Least_N_Arguments (1);
5020 Check_Arg_Is_Identifier (Arg1);
5028 while Present (Arg) loop
5029 Exp := Expression (Arg);
5032 if Is_Entity_Name (Exp) then
5035 elsif Nkind (Exp) = N_String_Literal then
5036 Resolve (Exp, Standard_String);
5038 elsif Is_Overloaded (Exp) then
5039 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
5054 -- pragma Assert ([Check =>] Boolean_EXPRESSION
5055 -- [, [Message =>] Static_String_EXPRESSION]);
5057 when Pragma_Assert => Assert : declare
5063 Check_At_Least_N_Arguments (1);
5064 Check_At_Most_N_Arguments (2);
5065 Check_Arg_Order ((Name_Check, Name_Message));
5066 Check_Optional_Identifier (Arg1, Name_Check);
5068 -- We treat pragma Assert as equivalent to:
5070 -- pragma Check (Assertion, condition [, msg]);
5072 -- So rewrite pragma in this manner, and analyze the result
5074 Expr := Get_Pragma_Arg (Arg1);
5076 Make_Pragma_Argument_Association (Loc,
5078 Make_Identifier (Loc,
5079 Chars => Name_Assertion)),
5081 Make_Pragma_Argument_Association (Sloc (Expr),
5082 Expression => Expr));
5084 if Arg_Count > 1 then
5085 Check_Optional_Identifier (Arg2, Name_Message);
5086 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
5087 Append_To (Newa, Relocate_Node (Arg2));
5092 Chars => Name_Check,
5093 Pragma_Argument_Associations => Newa));
5097 ----------------------
5098 -- Assertion_Policy --
5099 ----------------------
5101 -- pragma Assertion_Policy (Check | Ignore)
5103 when Pragma_Assertion_Policy => Assertion_Policy : declare
5108 Check_Valid_Configuration_Pragma;
5109 Check_Arg_Count (1);
5110 Check_No_Identifiers;
5111 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
5113 -- We treat pragma Assertion_Policy as equivalent to:
5115 -- pragma Check_Policy (Assertion, policy)
5117 -- So rewrite the pragma in that manner and link on to the chain
5118 -- of Check_Policy pragmas, marking the pragma as analyzed.
5120 Policy := Get_Pragma_Arg (Arg1);
5124 Chars => Name_Check_Policy,
5126 Pragma_Argument_Associations => New_List (
5127 Make_Pragma_Argument_Association (Loc,
5129 Make_Identifier (Loc,
5130 Chars => Name_Assertion)),
5132 Make_Pragma_Argument_Association (Loc,
5134 Make_Identifier (Sloc (Policy),
5135 Chars => Chars (Policy))))));
5138 Set_Next_Pragma (N, Opt.Check_Policy_List);
5139 Opt.Check_Policy_List := N;
5140 end Assertion_Policy;
5146 -- pragma AST_Entry (entry_IDENTIFIER);
5148 when Pragma_AST_Entry => AST_Entry : declare
5154 Check_Arg_Count (1);
5155 Check_No_Identifiers;
5156 Check_Arg_Is_Local_Name (Arg1);
5157 Ent := Entity (Expression (Arg1));
5159 -- Note: the implementation of the AST_Entry pragma could handle
5160 -- the entry family case fine, but for now we are consistent with
5161 -- the DEC rules, and do not allow the pragma, which of course
5162 -- has the effect of also forbidding the attribute.
5164 if Ekind (Ent) /= E_Entry then
5166 ("pragma% argument must be simple entry name", Arg1);
5168 elsif Is_AST_Entry (Ent) then
5170 ("duplicate % pragma for entry", Arg1);
5172 elsif Has_Homonym (Ent) then
5174 ("pragma% argument cannot specify overloaded entry", Arg1);
5178 FF : constant Entity_Id := First_Formal (Ent);
5181 if Present (FF) then
5182 if Present (Next_Formal (FF)) then
5184 ("entry for pragma% can have only one argument",
5187 elsif Parameter_Mode (FF) /= E_In_Parameter then
5189 ("entry parameter for pragma% must have mode IN",
5195 Set_Is_AST_Entry (Ent);
5203 -- pragma Asynchronous (LOCAL_NAME);
5205 when Pragma_Asynchronous => Asynchronous : declare
5213 procedure Process_Async_Pragma;
5214 -- Common processing for procedure and access-to-procedure case
5216 --------------------------
5217 -- Process_Async_Pragma --
5218 --------------------------
5220 procedure Process_Async_Pragma is
5223 Set_Is_Asynchronous (Nm);
5227 -- The formals should be of mode IN (RM E.4.1(6))
5230 while Present (S) loop
5231 Formal := Defining_Identifier (S);
5233 if Nkind (Formal) = N_Defining_Identifier
5234 and then Ekind (Formal) /= E_In_Parameter
5237 ("pragma% procedure can only have IN parameter",
5244 Set_Is_Asynchronous (Nm);
5245 end Process_Async_Pragma;
5247 -- Start of processing for pragma Asynchronous
5250 Check_Ada_83_Warning;
5251 Check_No_Identifiers;
5252 Check_Arg_Count (1);
5253 Check_Arg_Is_Local_Name (Arg1);
5255 if Debug_Flag_U then
5259 C_Ent := Cunit_Entity (Current_Sem_Unit);
5260 Analyze (Expression (Arg1));
5261 Nm := Entity (Expression (Arg1));
5263 if not Is_Remote_Call_Interface (C_Ent)
5264 and then not Is_Remote_Types (C_Ent)
5266 -- This pragma should only appear in an RCI or Remote Types
5267 -- unit (RM E.4.1(4))
5270 ("pragma% not in Remote_Call_Interface or " &
5271 "Remote_Types unit");
5274 if Ekind (Nm) = E_Procedure
5275 and then Nkind (Parent (Nm)) = N_Procedure_Specification
5277 if not Is_Remote_Call_Interface (Nm) then
5279 ("pragma% cannot be applied on non-remote procedure",
5283 L := Parameter_Specifications (Parent (Nm));
5284 Process_Async_Pragma;
5287 elsif Ekind (Nm) = E_Function then
5289 ("pragma% cannot be applied to function", Arg1);
5291 elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
5293 if Is_Record_Type (Nm) then
5294 -- A record type that is the Equivalent_Type for
5295 -- a remote access-to-subprogram type.
5297 N := Declaration_Node (Corresponding_Remote_Type (Nm));
5300 -- A non-expanded RAS type (case where distribution is
5303 N := Declaration_Node (Nm);
5306 if Nkind (N) = N_Full_Type_Declaration
5307 and then Nkind (Type_Definition (N)) =
5308 N_Access_Procedure_Definition
5310 L := Parameter_Specifications (Type_Definition (N));
5311 Process_Async_Pragma;
5313 if Is_Asynchronous (Nm)
5314 and then Expander_Active
5315 and then Get_PCS_Name /= Name_No_DSA
5317 RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
5322 ("pragma% cannot reference access-to-function type",
5326 -- Only other possibility is Access-to-class-wide type
5328 elsif Is_Access_Type (Nm)
5329 and then Is_Class_Wide_Type (Designated_Type (Nm))
5331 Check_First_Subtype (Arg1);
5332 Set_Is_Asynchronous (Nm);
5333 if Expander_Active then
5334 RACW_Type_Is_Asynchronous (Nm);
5338 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
5346 -- pragma Atomic (LOCAL_NAME);
5348 when Pragma_Atomic =>
5349 Process_Atomic_Shared_Volatile;
5351 -----------------------
5352 -- Atomic_Components --
5353 -----------------------
5355 -- pragma Atomic_Components (array_LOCAL_NAME);
5357 -- This processing is shared by Volatile_Components
5359 when Pragma_Atomic_Components |
5360 Pragma_Volatile_Components =>
5362 Atomic_Components : declare
5369 Check_Ada_83_Warning;
5370 Check_No_Identifiers;
5371 Check_Arg_Count (1);
5372 Check_Arg_Is_Local_Name (Arg1);
5373 E_Id := Expression (Arg1);
5375 if Etype (E_Id) = Any_Type then
5381 if Rep_Item_Too_Early (E, N)
5383 Rep_Item_Too_Late (E, N)
5388 D := Declaration_Node (E);
5391 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
5393 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
5394 and then Nkind (D) = N_Object_Declaration
5395 and then Nkind (Object_Definition (D)) =
5396 N_Constrained_Array_Definition)
5398 -- The flag is set on the object, or on the base type
5400 if Nkind (D) /= N_Object_Declaration then
5404 Set_Has_Volatile_Components (E);
5406 if Prag_Id = Pragma_Atomic_Components then
5407 Set_Has_Atomic_Components (E);
5409 if Is_Packed (E) then
5410 Set_Is_Packed (E, False);
5413 ("?Pack canceled, cannot pack atomic components",
5419 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
5421 end Atomic_Components;
5423 --------------------
5424 -- Attach_Handler --
5425 --------------------
5427 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
5429 when Pragma_Attach_Handler =>
5430 Check_Ada_83_Warning;
5431 Check_No_Identifiers;
5432 Check_Arg_Count (2);
5434 if No_Run_Time_Mode then
5435 Error_Msg_CRT ("Attach_Handler pragma", N);
5437 Check_Interrupt_Or_Attach_Handler;
5439 -- The expression that designates the attribute may
5440 -- depend on a discriminant, and is therefore a per-
5441 -- object expression, to be expanded in the init proc.
5442 -- If expansion is enabled, perform semantic checks
5445 if Expander_Active then
5447 Temp : constant Node_Id :=
5448 New_Copy_Tree (Expression (Arg2));
5450 Set_Parent (Temp, N);
5451 Preanalyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
5455 Analyze (Expression (Arg2));
5456 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
5459 Process_Interrupt_Or_Attach_Handler;
5462 --------------------
5463 -- C_Pass_By_Copy --
5464 --------------------
5466 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
5468 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
5474 Check_Valid_Configuration_Pragma;
5475 Check_Arg_Count (1);
5476 Check_Optional_Identifier (Arg1, "max_size");
5478 Arg := Expression (Arg1);
5479 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
5481 Val := Expr_Value (Arg);
5485 ("maximum size for pragma% must be positive", Arg1);
5487 elsif UI_Is_In_Int_Range (Val) then
5488 Default_C_Record_Mechanism := UI_To_Int (Val);
5490 -- If a giant value is given, Int'Last will do well enough.
5491 -- If sometime someone complains that a record larger than
5492 -- two gigabytes is not copied, we will worry about it then!
5495 Default_C_Record_Mechanism := Mechanism_Type'Last;
5503 -- pragma Check ([Name =>] Identifier,
5504 -- [Check =>] Boolean_Expression
5505 -- [,[Message =>] String_Expression]);
5507 when Pragma_Check => Check : declare
5512 -- Set True if category of assertions referenced by Name enabled
5516 Check_At_Least_N_Arguments (2);
5517 Check_At_Most_N_Arguments (3);
5518 Check_Optional_Identifier (Arg1, Name_Name);
5519 Check_Optional_Identifier (Arg2, Name_Check);
5521 if Arg_Count = 3 then
5522 Check_Optional_Identifier (Arg3, Name_Message);
5523 Analyze_And_Resolve (Get_Pragma_Arg (Arg3), Standard_String);
5526 Check_Arg_Is_Identifier (Arg1);
5527 Check_On := Check_Enabled (Chars (Get_Pragma_Arg (Arg1)));
5529 -- If expansion is active and the check is not enabled then we
5530 -- rewrite the Check as:
5532 -- if False and then condition then
5536 -- The reason we do this rewriting during semantic analysis rather
5537 -- than as part of normal expansion is that we cannot analyze and
5538 -- expand the code for the boolean expression directly, or it may
5539 -- cause insertion of actions that would escape the attempt to
5540 -- suppress the check code.
5542 -- Note that the Sloc for the if statement corresponds to the
5543 -- argument condition, not the pragma itself. The reason for this
5544 -- is that we may generate a warning if the condition is False at
5545 -- compile time, and we do not want to delete this warning when we
5546 -- delete the if statement.
5548 Expr := Expression (Arg2);
5550 if Expander_Active and then not Check_On then
5551 Eloc := Sloc (Expr);
5554 Make_If_Statement (Eloc,
5556 Make_And_Then (Eloc,
5557 Left_Opnd => New_Occurrence_Of (Standard_False, Eloc),
5558 Right_Opnd => Expr),
5559 Then_Statements => New_List (
5560 Make_Null_Statement (Eloc))));
5567 Analyze_And_Resolve (Expr, Any_Boolean);
5570 -- If assertion is of the form (X'First = literal), where X is
5571 -- a formal, then set Low_Bound_Known flag on this formal.
5573 if Nkind (Expr) = N_Op_Eq then
5575 Right : constant Node_Id := Right_Opnd (Expr);
5576 Left : constant Node_Id := Left_Opnd (Expr);
5578 if Nkind (Left) = N_Attribute_Reference
5579 and then Attribute_Name (Left) = Name_First
5580 and then Is_Entity_Name (Prefix (Left))
5581 and then Is_Formal (Entity (Prefix (Left)))
5582 and then Nkind (Right) = N_Integer_Literal
5584 Set_Low_Bound_Known (Entity (Prefix (Left)));
5594 -- pragma Check_Name (check_IDENTIFIER);
5596 when Pragma_Check_Name =>
5597 Check_No_Identifiers;
5599 Check_Valid_Configuration_Pragma;
5600 Check_Arg_Count (1);
5601 Check_Arg_Is_Identifier (Arg1);
5604 Nam : constant Name_Id := Chars (Expression (Arg1));
5607 for J in Check_Names.First .. Check_Names.Last loop
5608 if Check_Names.Table (J) = Nam then
5613 Check_Names.Append (Nam);
5620 -- pragma Check_Policy ([Name =>] IDENTIFIER,
5621 -- POLICY_IDENTIFIER;
5623 -- POLICY_IDENTIFIER ::= ON | OFF | CHECK | IGNORE
5625 -- Note: this is a configuration pragma, but it is allowed to
5626 -- appear anywhere else.
5628 when Pragma_Check_Policy =>
5630 Check_Arg_Count (2);
5631 Check_No_Identifier (Arg2);
5632 Check_Optional_Identifier (Arg1, Name_Name);
5634 (Arg2, Name_On, Name_Off, Name_Check, Name_Ignore);
5636 -- A Check_Policy pragma can appear either as a configuration
5637 -- pragma, or in a declarative part or a package spec (see RM
5638 -- 11.5(5) for rules for Suppress/Unsuppress which are also
5639 -- followed for Check_Policy).
5641 if not Is_Configuration_Pragma then
5642 Check_Is_In_Decl_Part_Or_Package_Spec;
5645 Set_Next_Pragma (N, Opt.Check_Policy_List);
5646 Opt.Check_Policy_List := N;
5648 ---------------------
5649 -- CIL_Constructor --
5650 ---------------------
5652 -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME);
5654 -- Processing for this pragma is shared with Java_Constructor
5660 -- pragma Comment (static_string_EXPRESSION)
5662 -- Processing for pragma Comment shares the circuitry for
5663 -- pragma Ident. The only differences are that Ident enforces
5664 -- a limit of 31 characters on its argument, and also enforces
5665 -- limitations on placement for DEC compatibility. Pragma
5666 -- Comment shares neither of these restrictions.
5672 -- pragma Common_Object (
5673 -- [Internal =>] LOCAL_NAME
5674 -- [, [External =>] EXTERNAL_SYMBOL]
5675 -- [, [Size =>] EXTERNAL_SYMBOL]);
5677 -- Processing for this pragma is shared with Psect_Object
5679 ------------------------
5680 -- Compile_Time_Error --
5681 ------------------------
5683 -- pragma Compile_Time_Error
5684 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5686 when Pragma_Compile_Time_Error =>
5687 Process_Compile_Time_Warning_Or_Error;
5689 --------------------------
5690 -- Compile_Time_Warning --
5691 --------------------------
5693 -- pragma Compile_Time_Warning
5694 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5696 when Pragma_Compile_Time_Warning =>
5697 Process_Compile_Time_Warning_Or_Error;
5703 when Pragma_Compiler_Unit =>
5705 Check_Arg_Count (0);
5706 Set_Is_Compiler_Unit (Get_Source_Unit (N));
5708 -----------------------------
5709 -- Complete_Representation --
5710 -----------------------------
5712 -- pragma Complete_Representation;
5714 when Pragma_Complete_Representation =>
5716 Check_Arg_Count (0);
5718 if Nkind (Parent (N)) /= N_Record_Representation_Clause then
5720 ("pragma & must appear within record representation clause");
5723 ----------------------------
5724 -- Complex_Representation --
5725 ----------------------------
5727 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
5729 when Pragma_Complex_Representation => Complex_Representation : declare
5736 Check_Arg_Count (1);
5737 Check_Optional_Identifier (Arg1, Name_Entity);
5738 Check_Arg_Is_Local_Name (Arg1);
5739 E_Id := Expression (Arg1);
5741 if Etype (E_Id) = Any_Type then
5747 if not Is_Record_Type (E) then
5749 ("argument for pragma% must be record type", Arg1);
5752 Ent := First_Entity (E);
5755 or else No (Next_Entity (Ent))
5756 or else Present (Next_Entity (Next_Entity (Ent)))
5757 or else not Is_Floating_Point_Type (Etype (Ent))
5758 or else Etype (Ent) /= Etype (Next_Entity (Ent))
5761 ("record for pragma% must have two fields of the same "
5762 & "floating-point type", Arg1);
5765 Set_Has_Complex_Representation (Base_Type (E));
5767 -- We need to treat the type has having a non-standard
5768 -- representation, for back-end purposes, even though in
5769 -- general a complex will have the default representation
5770 -- of a record with two real components.
5772 Set_Has_Non_Standard_Rep (Base_Type (E));
5774 end Complex_Representation;
5776 -------------------------
5777 -- Component_Alignment --
5778 -------------------------
5780 -- pragma Component_Alignment (
5781 -- [Form =>] ALIGNMENT_CHOICE
5782 -- [, [Name =>] type_LOCAL_NAME]);
5784 -- ALIGNMENT_CHOICE ::=
5786 -- | Component_Size_4
5790 when Pragma_Component_Alignment => Component_AlignmentP : declare
5791 Args : Args_List (1 .. 2);
5792 Names : constant Name_List (1 .. 2) := (
5796 Form : Node_Id renames Args (1);
5797 Name : Node_Id renames Args (2);
5799 Atype : Component_Alignment_Kind;
5804 Gather_Associations (Names, Args);
5807 Error_Pragma ("missing Form argument for pragma%");
5810 Check_Arg_Is_Identifier (Form);
5812 -- Get proper alignment, note that Default = Component_Size
5813 -- on all machines we have so far, and we want to set this
5814 -- value rather than the default value to indicate that it
5815 -- has been explicitly set (and thus will not get overridden
5816 -- by the default component alignment for the current scope)
5818 if Chars (Form) = Name_Component_Size then
5819 Atype := Calign_Component_Size;
5821 elsif Chars (Form) = Name_Component_Size_4 then
5822 Atype := Calign_Component_Size_4;
5824 elsif Chars (Form) = Name_Default then
5825 Atype := Calign_Component_Size;
5827 elsif Chars (Form) = Name_Storage_Unit then
5828 Atype := Calign_Storage_Unit;
5832 ("invalid Form parameter for pragma%", Form);
5835 -- Case with no name, supplied, affects scope table entry
5839 (Scope_Stack.Last).Component_Alignment_Default := Atype;
5841 -- Case of name supplied
5844 Check_Arg_Is_Local_Name (Name);
5846 Typ := Entity (Name);
5849 or else Rep_Item_Too_Early (Typ, N)
5853 Typ := Underlying_Type (Typ);
5856 if not Is_Record_Type (Typ)
5857 and then not Is_Array_Type (Typ)
5860 ("Name parameter of pragma% must identify record or " &
5861 "array type", Name);
5864 -- An explicit Component_Alignment pragma overrides an
5865 -- implicit pragma Pack, but not an explicit one.
5867 if not Has_Pragma_Pack (Base_Type (Typ)) then
5868 Set_Is_Packed (Base_Type (Typ), False);
5869 Set_Component_Alignment (Base_Type (Typ), Atype);
5872 end Component_AlignmentP;
5878 -- pragma Controlled (first_subtype_LOCAL_NAME);
5880 when Pragma_Controlled => Controlled : declare
5884 Check_No_Identifiers;
5885 Check_Arg_Count (1);
5886 Check_Arg_Is_Local_Name (Arg1);
5887 Arg := Expression (Arg1);
5889 if not Is_Entity_Name (Arg)
5890 or else not Is_Access_Type (Entity (Arg))
5892 Error_Pragma_Arg ("pragma% requires access type", Arg1);
5894 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
5902 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
5903 -- [Entity =>] LOCAL_NAME);
5905 when Pragma_Convention => Convention : declare
5908 pragma Warnings (Off, C);
5909 pragma Warnings (Off, E);
5911 Check_Arg_Order ((Name_Convention, Name_Entity));
5912 Check_Ada_83_Warning;
5913 Check_Arg_Count (2);
5914 Process_Convention (C, E);
5917 ---------------------------
5918 -- Convention_Identifier --
5919 ---------------------------
5921 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
5922 -- [Convention =>] convention_IDENTIFIER);
5924 when Pragma_Convention_Identifier => Convention_Identifier : declare
5930 Check_Arg_Order ((Name_Name, Name_Convention));
5931 Check_Arg_Count (2);
5932 Check_Optional_Identifier (Arg1, Name_Name);
5933 Check_Optional_Identifier (Arg2, Name_Convention);
5934 Check_Arg_Is_Identifier (Arg1);
5935 Check_Arg_Is_Identifier (Arg2);
5936 Idnam := Chars (Expression (Arg1));
5937 Cname := Chars (Expression (Arg2));
5939 if Is_Convention_Name (Cname) then
5940 Record_Convention_Identifier
5941 (Idnam, Get_Convention_Id (Cname));
5944 ("second arg for % pragma must be convention", Arg2);
5946 end Convention_Identifier;
5952 -- pragma CPP_Class ([Entity =>] local_NAME)
5954 when Pragma_CPP_Class => CPP_Class : declare
5959 if Warn_On_Obsolescent_Feature then
5961 ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" &
5962 " by pragma import?", N);
5966 Check_Arg_Count (1);
5967 Check_Optional_Identifier (Arg1, Name_Entity);
5968 Check_Arg_Is_Local_Name (Arg1);
5970 Arg := Expression (Arg1);
5973 if Etype (Arg) = Any_Type then
5977 if not Is_Entity_Name (Arg)
5978 or else not Is_Type (Entity (Arg))
5980 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
5983 Typ := Entity (Arg);
5985 if not Is_Tagged_Type (Typ) then
5986 Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1);
5989 -- Types treated as CPP classes are treated as limited, but we
5990 -- don't require them to be declared this way. A warning is issued
5991 -- to encourage the user to declare them as limited. This is not
5992 -- an error, for compatibility reasons, because these types have
5993 -- been supported this way for some time.
5995 if not Is_Limited_Type (Typ) then
5997 ("imported 'C'P'P type should be " &
5998 "explicitly declared limited?",
5999 Get_Pragma_Arg (Arg1));
6001 ("\type will be considered limited",
6002 Get_Pragma_Arg (Arg1));
6005 Set_Is_CPP_Class (Typ);
6006 Set_Is_Limited_Record (Typ);
6007 Set_Convention (Typ, Convention_CPP);
6010 ---------------------
6011 -- CPP_Constructor --
6012 ---------------------
6014 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME
6015 -- [, [External_Name =>] static_string_EXPRESSION ]
6016 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6018 when Pragma_CPP_Constructor => CPP_Constructor : declare
6024 Check_At_Least_N_Arguments (1);
6025 Check_At_Most_N_Arguments (3);
6026 Check_Optional_Identifier (Arg1, Name_Entity);
6027 Check_Arg_Is_Local_Name (Arg1);
6029 Id := Expression (Arg1);
6030 Find_Program_Unit_Name (Id);
6032 -- If we did not find the name, we are done
6034 if Etype (Id) = Any_Type then
6038 Def_Id := Entity (Id);
6040 if Ekind (Def_Id) = E_Function
6041 and then Is_Class_Wide_Type (Etype (Def_Id))
6042 and then Is_CPP_Class (Etype (Etype (Def_Id)))
6044 if Arg_Count >= 2 then
6045 Set_Imported (Def_Id);
6046 Set_Is_Public (Def_Id);
6047 Process_Interface_Name (Def_Id, Arg2, Arg3);
6050 if No (Parameter_Specifications (Parent (Def_Id))) then
6051 Set_Has_Completion (Def_Id);
6052 Set_Is_Constructor (Def_Id);
6055 ("non-default constructors not implemented", Arg1);
6060 ("pragma% requires function returning a 'C'P'P_Class type",
6063 end CPP_Constructor;
6069 when Pragma_CPP_Virtual => CPP_Virtual : declare
6071 if Warn_On_Obsolescent_Feature then
6073 ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " &
6082 when Pragma_CPP_Vtable => CPP_Vtable : declare
6084 if Warn_On_Obsolescent_Feature then
6086 ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " &
6095 -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
6097 when Pragma_Debug => Debug : declare
6105 (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
6108 if Arg_Count = 2 then
6111 Left_Opnd => Relocate_Node (Cond),
6112 Right_Opnd => Expression (Arg1));
6115 -- Rewrite into a conditional with an appropriate condition. We
6116 -- wrap the procedure call in a block so that overhead from e.g.
6117 -- use of the secondary stack does not generate execution overhead
6118 -- for suppressed conditions.
6120 Rewrite (N, Make_Implicit_If_Statement (N,
6122 Then_Statements => New_List (
6123 Make_Block_Statement (Loc,
6124 Handled_Statement_Sequence =>
6125 Make_Handled_Sequence_Of_Statements (Loc,
6126 Statements => New_List (
6127 Relocate_Node (Debug_Statement (N))))))));
6135 -- pragma Debug_Policy (Check | Ignore)
6137 when Pragma_Debug_Policy =>
6139 Check_Arg_Count (1);
6140 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
6141 Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
6143 ---------------------
6144 -- Detect_Blocking --
6145 ---------------------
6147 -- pragma Detect_Blocking;
6149 when Pragma_Detect_Blocking =>
6151 Check_Arg_Count (0);
6152 Check_Valid_Configuration_Pragma;
6153 Detect_Blocking := True;
6159 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
6161 when Pragma_Discard_Names => Discard_Names : declare
6166 Check_Ada_83_Warning;
6168 -- Deal with configuration pragma case
6170 if Arg_Count = 0 and then Is_Configuration_Pragma then
6171 Global_Discard_Names := True;
6174 -- Otherwise, check correct appropriate context
6177 Check_Is_In_Decl_Part_Or_Package_Spec;
6179 if Arg_Count = 0 then
6181 -- If there is no parameter, then from now on this pragma
6182 -- applies to any enumeration, exception or tagged type
6183 -- defined in the current declarative part, and recursively
6184 -- to any nested scope.
6186 Set_Discard_Names (Current_Scope);
6190 Check_Arg_Count (1);
6191 Check_Optional_Identifier (Arg1, Name_On);
6192 Check_Arg_Is_Local_Name (Arg1);
6193 E_Id := Expression (Arg1);
6195 if Etype (E_Id) = Any_Type then
6201 if (Is_First_Subtype (E)
6202 and then (Is_Enumeration_Type (E)
6203 or else Is_Tagged_Type (E)))
6204 or else Ekind (E) = E_Exception
6206 Set_Discard_Names (E);
6209 ("inappropriate entity for pragma%", Arg1);
6219 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
6221 when Pragma_Elaborate => Elaborate : declare
6226 -- Pragma must be in context items list of a compilation unit
6228 if not Is_In_Context_Clause then
6232 -- Must be at least one argument
6234 if Arg_Count = 0 then
6235 Error_Pragma ("pragma% requires at least one argument");
6238 -- In Ada 83 mode, there can be no items following it in the
6239 -- context list except other pragmas and implicit with clauses
6240 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
6241 -- placement rule does not apply.
6243 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
6245 while Present (Citem) loop
6246 if Nkind (Citem) = N_Pragma
6247 or else (Nkind (Citem) = N_With_Clause
6248 and then Implicit_With (Citem))
6253 ("(Ada 83) pragma% must be at end of context clause");
6260 -- Finally, the arguments must all be units mentioned in a with
6261 -- clause in the same context clause. Note we already checked (in
6262 -- Par.Prag) that the arguments are all identifiers or selected
6266 Outer : while Present (Arg) loop
6267 Citem := First (List_Containing (N));
6268 Inner : while Citem /= N loop
6269 if Nkind (Citem) = N_With_Clause
6270 and then Same_Name (Name (Citem), Expression (Arg))
6272 Set_Elaborate_Present (Citem, True);
6273 Set_Unit_Name (Expression (Arg), Name (Citem));
6275 -- With the pragma present, elaboration calls on
6276 -- subprograms from the named unit need no further
6277 -- checks, as long as the pragma appears in the current
6278 -- compilation unit. If the pragma appears in some unit
6279 -- in the context, there might still be a need for an
6280 -- Elaborate_All_Desirable from the current compilation
6281 -- to the named unit, so we keep the check enabled.
6283 if In_Extended_Main_Source_Unit (N) then
6284 Set_Suppress_Elaboration_Warnings
6285 (Entity (Name (Citem)));
6296 ("argument of pragma% is not with'ed unit", Arg);
6302 -- Give a warning if operating in static mode with -gnatwl
6303 -- (elaboration warnings enabled) switch set.
6305 if Elab_Warnings and not Dynamic_Elaboration_Checks then
6307 ("?use of pragma Elaborate may not be safe", N);
6309 ("?use pragma Elaborate_All instead if possible", N);
6317 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
6319 when Pragma_Elaborate_All => Elaborate_All : declare
6324 Check_Ada_83_Warning;
6326 -- Pragma must be in context items list of a compilation unit
6328 if not Is_In_Context_Clause then
6332 -- Must be at least one argument
6334 if Arg_Count = 0 then
6335 Error_Pragma ("pragma% requires at least one argument");
6338 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
6339 -- have to appear at the end of the context clause, but may
6340 -- appear mixed in with other items, even in Ada 83 mode.
6342 -- Final check: the arguments must all be units mentioned in
6343 -- a with clause in the same context clause. Note that we
6344 -- already checked (in Par.Prag) that all the arguments are
6345 -- either identifiers or selected components.
6348 Outr : while Present (Arg) loop
6349 Citem := First (List_Containing (N));
6350 Innr : while Citem /= N loop
6351 if Nkind (Citem) = N_With_Clause
6352 and then Same_Name (Name (Citem), Expression (Arg))
6354 Set_Elaborate_All_Present (Citem, True);
6355 Set_Unit_Name (Expression (Arg), Name (Citem));
6357 -- Suppress warnings and elaboration checks on the named
6358 -- unit if the pragma is in the current compilation, as
6359 -- for pragma Elaborate.
6361 if In_Extended_Main_Source_Unit (N) then
6362 Set_Suppress_Elaboration_Warnings
6363 (Entity (Name (Citem)));
6372 Set_Error_Posted (N);
6374 ("argument of pragma% is not with'ed unit", Arg);
6381 --------------------
6382 -- Elaborate_Body --
6383 --------------------
6385 -- pragma Elaborate_Body [( library_unit_NAME )];
6387 when Pragma_Elaborate_Body => Elaborate_Body : declare
6388 Cunit_Node : Node_Id;
6389 Cunit_Ent : Entity_Id;
6392 Check_Ada_83_Warning;
6393 Check_Valid_Library_Unit_Pragma;
6395 if Nkind (N) = N_Null_Statement then
6399 Cunit_Node := Cunit (Current_Sem_Unit);
6400 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
6402 if Nkind (Unit (Cunit_Node)) = N_Package_Body
6404 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
6406 Error_Pragma ("pragma% must refer to a spec, not a body");
6408 Set_Body_Required (Cunit_Node, True);
6409 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
6411 -- If we are in dynamic elaboration mode, then we suppress
6412 -- elaboration warnings for the unit, since it is definitely
6413 -- fine NOT to do dynamic checks at the first level (and such
6414 -- checks will be suppressed because no elaboration boolean
6415 -- is created for Elaborate_Body packages).
6417 -- But in the static model of elaboration, Elaborate_Body is
6418 -- definitely NOT good enough to ensure elaboration safety on
6419 -- its own, since the body may WITH other units that are not
6420 -- safe from an elaboration point of view, so a client must
6421 -- still do an Elaborate_All on such units.
6423 -- Debug flag -gnatdD restores the old behavior of 3.13,
6424 -- where Elaborate_Body always suppressed elab warnings.
6426 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
6427 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
6432 ------------------------
6433 -- Elaboration_Checks --
6434 ------------------------
6436 -- pragma Elaboration_Checks (Static | Dynamic);
6438 when Pragma_Elaboration_Checks =>
6440 Check_Arg_Count (1);
6441 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
6442 Dynamic_Elaboration_Checks :=
6443 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
6449 -- pragma Eliminate (
6450 -- [Unit_Name =>] IDENTIFIER |
6451 -- SELECTED_COMPONENT
6452 -- [,[Entity =>] IDENTIFIER |
6453 -- SELECTED_COMPONENT |
6455 -- [,]OVERLOADING_RESOLUTION);
6457 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
6460 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
6463 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
6465 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
6466 -- Result_Type => result_SUBTYPE_NAME]
6468 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
6469 -- SUBTYPE_NAME ::= STRING_LITERAL
6471 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
6472 -- SOURCE_TRACE ::= STRING_LITERAL
6474 when Pragma_Eliminate => Eliminate : declare
6475 Args : Args_List (1 .. 5);
6476 Names : constant Name_List (1 .. 5) := (
6479 Name_Parameter_Types,
6481 Name_Source_Location);
6483 Unit_Name : Node_Id renames Args (1);
6484 Entity : Node_Id renames Args (2);
6485 Parameter_Types : Node_Id renames Args (3);
6486 Result_Type : Node_Id renames Args (4);
6487 Source_Location : Node_Id renames Args (5);
6491 Check_Valid_Configuration_Pragma;
6492 Gather_Associations (Names, Args);
6494 if No (Unit_Name) then
6495 Error_Pragma ("missing Unit_Name argument for pragma%");
6499 and then (Present (Parameter_Types)
6501 Present (Result_Type)
6503 Present (Source_Location))
6505 Error_Pragma ("missing Entity argument for pragma%");
6508 if (Present (Parameter_Types)
6510 Present (Result_Type))
6512 Present (Source_Location)
6515 ("parameter profile and source location cannot " &
6516 "be used together in pragma%");
6519 Process_Eliminate_Pragma
6533 -- [ Convention =>] convention_IDENTIFIER,
6534 -- [ Entity =>] local_NAME
6535 -- [, [External_Name =>] static_string_EXPRESSION ]
6536 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6538 when Pragma_Export => Export : declare
6542 pragma Warnings (Off, C);
6545 Check_Ada_83_Warning;
6551 Check_At_Least_N_Arguments (2);
6552 Check_At_Most_N_Arguments (4);
6553 Process_Convention (C, Def_Id);
6555 if Ekind (Def_Id) /= E_Constant then
6556 Note_Possible_Modification (Expression (Arg2), Sure => False);
6559 Process_Interface_Name (Def_Id, Arg3, Arg4);
6560 Set_Exported (Def_Id, Arg2);
6562 -- If the entity is a deferred constant, propagate the
6563 -- information to the full view, because gigi elaborates
6564 -- the full view only.
6566 if Ekind (Def_Id) = E_Constant
6567 and then Present (Full_View (Def_Id))
6570 Id2 : constant Entity_Id := Full_View (Def_Id);
6572 Set_Is_Exported (Id2, Is_Exported (Def_Id));
6573 Set_First_Rep_Item (Id2, First_Rep_Item (Def_Id));
6574 Set_Interface_Name (Id2, Einfo.Interface_Name (Def_Id));
6579 ----------------------
6580 -- Export_Exception --
6581 ----------------------
6583 -- pragma Export_Exception (
6584 -- [Internal =>] LOCAL_NAME
6585 -- [, [External =>] EXTERNAL_SYMBOL]
6586 -- [, [Form =>] Ada | VMS]
6587 -- [, [Code =>] static_integer_EXPRESSION]);
6589 when Pragma_Export_Exception => Export_Exception : declare
6590 Args : Args_List (1 .. 4);
6591 Names : constant Name_List (1 .. 4) := (
6597 Internal : Node_Id renames Args (1);
6598 External : Node_Id renames Args (2);
6599 Form : Node_Id renames Args (3);
6600 Code : Node_Id renames Args (4);
6603 if Inside_A_Generic then
6604 Error_Pragma ("pragma% cannot be used for generic entities");
6607 Gather_Associations (Names, Args);
6608 Process_Extended_Import_Export_Exception_Pragma (
6609 Arg_Internal => Internal,
6610 Arg_External => External,
6614 if not Is_VMS_Exception (Entity (Internal)) then
6615 Set_Exported (Entity (Internal), Internal);
6617 end Export_Exception;
6619 ---------------------
6620 -- Export_Function --
6621 ---------------------
6623 -- pragma Export_Function (
6624 -- [Internal =>] LOCAL_NAME
6625 -- [, [External =>] EXTERNAL_SYMBOL]
6626 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6627 -- [, [Result_Type =>] TYPE_DESIGNATOR]
6628 -- [, [Mechanism =>] MECHANISM]
6629 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
6631 -- EXTERNAL_SYMBOL ::=
6633 -- | static_string_EXPRESSION
6635 -- PARAMETER_TYPES ::=
6637 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6639 -- TYPE_DESIGNATOR ::=
6641 -- | subtype_Name ' Access
6645 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6647 -- MECHANISM_ASSOCIATION ::=
6648 -- [formal_parameter_NAME =>] MECHANISM_NAME
6650 -- MECHANISM_NAME ::=
6653 -- | Descriptor [([Class =>] CLASS_NAME)]
6655 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6657 when Pragma_Export_Function => Export_Function : declare
6658 Args : Args_List (1 .. 6);
6659 Names : constant Name_List (1 .. 6) := (
6662 Name_Parameter_Types,
6665 Name_Result_Mechanism);
6667 Internal : Node_Id renames Args (1);
6668 External : Node_Id renames Args (2);
6669 Parameter_Types : Node_Id renames Args (3);
6670 Result_Type : Node_Id renames Args (4);
6671 Mechanism : Node_Id renames Args (5);
6672 Result_Mechanism : Node_Id renames Args (6);
6676 Gather_Associations (Names, Args);
6677 Process_Extended_Import_Export_Subprogram_Pragma (
6678 Arg_Internal => Internal,
6679 Arg_External => External,
6680 Arg_Parameter_Types => Parameter_Types,
6681 Arg_Result_Type => Result_Type,
6682 Arg_Mechanism => Mechanism,
6683 Arg_Result_Mechanism => Result_Mechanism);
6684 end Export_Function;
6690 -- pragma Export_Object (
6691 -- [Internal =>] LOCAL_NAME
6692 -- [, [External =>] EXTERNAL_SYMBOL]
6693 -- [, [Size =>] EXTERNAL_SYMBOL]);
6695 -- EXTERNAL_SYMBOL ::=
6697 -- | static_string_EXPRESSION
6699 -- PARAMETER_TYPES ::=
6701 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6703 -- TYPE_DESIGNATOR ::=
6705 -- | subtype_Name ' Access
6709 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6711 -- MECHANISM_ASSOCIATION ::=
6712 -- [formal_parameter_NAME =>] MECHANISM_NAME
6714 -- MECHANISM_NAME ::=
6717 -- | Descriptor [([Class =>] CLASS_NAME)]
6719 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6721 when Pragma_Export_Object => Export_Object : declare
6722 Args : Args_List (1 .. 3);
6723 Names : constant Name_List (1 .. 3) := (
6728 Internal : Node_Id renames Args (1);
6729 External : Node_Id renames Args (2);
6730 Size : Node_Id renames Args (3);
6734 Gather_Associations (Names, Args);
6735 Process_Extended_Import_Export_Object_Pragma (
6736 Arg_Internal => Internal,
6737 Arg_External => External,
6741 ----------------------
6742 -- Export_Procedure --
6743 ----------------------
6745 -- pragma Export_Procedure (
6746 -- [Internal =>] LOCAL_NAME
6747 -- [, [External =>] EXTERNAL_SYMBOL]
6748 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6749 -- [, [Mechanism =>] MECHANISM]);
6751 -- EXTERNAL_SYMBOL ::=
6753 -- | static_string_EXPRESSION
6755 -- PARAMETER_TYPES ::=
6757 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6759 -- TYPE_DESIGNATOR ::=
6761 -- | subtype_Name ' Access
6765 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6767 -- MECHANISM_ASSOCIATION ::=
6768 -- [formal_parameter_NAME =>] MECHANISM_NAME
6770 -- MECHANISM_NAME ::=
6773 -- | Descriptor [([Class =>] CLASS_NAME)]
6775 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6777 when Pragma_Export_Procedure => Export_Procedure : declare
6778 Args : Args_List (1 .. 4);
6779 Names : constant Name_List (1 .. 4) := (
6782 Name_Parameter_Types,
6785 Internal : Node_Id renames Args (1);
6786 External : Node_Id renames Args (2);
6787 Parameter_Types : Node_Id renames Args (3);
6788 Mechanism : Node_Id renames Args (4);
6792 Gather_Associations (Names, Args);
6793 Process_Extended_Import_Export_Subprogram_Pragma (
6794 Arg_Internal => Internal,
6795 Arg_External => External,
6796 Arg_Parameter_Types => Parameter_Types,
6797 Arg_Mechanism => Mechanism);
6798 end Export_Procedure;
6804 -- pragma Export_Value (
6805 -- [Value =>] static_integer_EXPRESSION,
6806 -- [Link_Name =>] static_string_EXPRESSION);
6808 when Pragma_Export_Value =>
6810 Check_Arg_Order ((Name_Value, Name_Link_Name));
6811 Check_Arg_Count (2);
6813 Check_Optional_Identifier (Arg1, Name_Value);
6814 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6816 Check_Optional_Identifier (Arg2, Name_Link_Name);
6817 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
6819 -----------------------------
6820 -- Export_Valued_Procedure --
6821 -----------------------------
6823 -- pragma Export_Valued_Procedure (
6824 -- [Internal =>] LOCAL_NAME
6825 -- [, [External =>] EXTERNAL_SYMBOL,]
6826 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6827 -- [, [Mechanism =>] MECHANISM]);
6829 -- EXTERNAL_SYMBOL ::=
6831 -- | static_string_EXPRESSION
6833 -- PARAMETER_TYPES ::=
6835 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6837 -- TYPE_DESIGNATOR ::=
6839 -- | subtype_Name ' Access
6843 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6845 -- MECHANISM_ASSOCIATION ::=
6846 -- [formal_parameter_NAME =>] MECHANISM_NAME
6848 -- MECHANISM_NAME ::=
6851 -- | Descriptor [([Class =>] CLASS_NAME)]
6853 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6855 when Pragma_Export_Valued_Procedure =>
6856 Export_Valued_Procedure : declare
6857 Args : Args_List (1 .. 4);
6858 Names : constant Name_List (1 .. 4) := (
6861 Name_Parameter_Types,
6864 Internal : Node_Id renames Args (1);
6865 External : Node_Id renames Args (2);
6866 Parameter_Types : Node_Id renames Args (3);
6867 Mechanism : Node_Id renames Args (4);
6871 Gather_Associations (Names, Args);
6872 Process_Extended_Import_Export_Subprogram_Pragma (
6873 Arg_Internal => Internal,
6874 Arg_External => External,
6875 Arg_Parameter_Types => Parameter_Types,
6876 Arg_Mechanism => Mechanism);
6877 end Export_Valued_Procedure;
6883 -- pragma Extend_System ([Name =>] Identifier);
6885 when Pragma_Extend_System => Extend_System : declare
6888 Check_Valid_Configuration_Pragma;
6889 Check_Arg_Count (1);
6890 Check_Optional_Identifier (Arg1, Name_Name);
6891 Check_Arg_Is_Identifier (Arg1);
6893 Get_Name_String (Chars (Expression (Arg1)));
6896 and then Name_Buffer (1 .. 4) = "aux_"
6898 if Present (System_Extend_Pragma_Arg) then
6899 if Chars (Expression (Arg1)) =
6900 Chars (Expression (System_Extend_Pragma_Arg))
6904 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
6905 Error_Pragma ("pragma% conflicts with that #");
6909 System_Extend_Pragma_Arg := Arg1;
6911 if not GNAT_Mode then
6912 System_Extend_Unit := Arg1;
6916 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
6920 ------------------------
6921 -- Extensions_Allowed --
6922 ------------------------
6924 -- pragma Extensions_Allowed (ON | OFF);
6926 when Pragma_Extensions_Allowed =>
6928 Check_Arg_Count (1);
6929 Check_No_Identifiers;
6930 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
6932 if Chars (Expression (Arg1)) = Name_On then
6933 Extensions_Allowed := True;
6935 Extensions_Allowed := False;
6942 -- pragma External (
6943 -- [ Convention =>] convention_IDENTIFIER,
6944 -- [ Entity =>] local_NAME
6945 -- [, [External_Name =>] static_string_EXPRESSION ]
6946 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6948 when Pragma_External => External : declare
6952 pragma Warnings (Off, C);
6961 Check_At_Least_N_Arguments (2);
6962 Check_At_Most_N_Arguments (4);
6963 Process_Convention (C, Def_Id);
6964 Note_Possible_Modification (Expression (Arg2), Sure => False);
6965 Process_Interface_Name (Def_Id, Arg3, Arg4);
6966 Set_Exported (Def_Id, Arg2);
6969 --------------------------
6970 -- External_Name_Casing --
6971 --------------------------
6973 -- pragma External_Name_Casing (
6974 -- UPPERCASE | LOWERCASE
6975 -- [, AS_IS | UPPERCASE | LOWERCASE]);
6977 when Pragma_External_Name_Casing => External_Name_Casing : declare
6980 Check_No_Identifiers;
6982 if Arg_Count = 2 then
6984 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
6986 case Chars (Get_Pragma_Arg (Arg2)) is
6988 Opt.External_Name_Exp_Casing := As_Is;
6990 when Name_Uppercase =>
6991 Opt.External_Name_Exp_Casing := Uppercase;
6993 when Name_Lowercase =>
6994 Opt.External_Name_Exp_Casing := Lowercase;
7001 Check_Arg_Count (1);
7004 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
7006 case Chars (Get_Pragma_Arg (Arg1)) is
7007 when Name_Uppercase =>
7008 Opt.External_Name_Imp_Casing := Uppercase;
7010 when Name_Lowercase =>
7011 Opt.External_Name_Imp_Casing := Lowercase;
7016 end External_Name_Casing;
7018 --------------------------
7019 -- Favor_Top_Level --
7020 --------------------------
7022 -- pragma Favor_Top_Level (type_NAME);
7024 when Pragma_Favor_Top_Level => Favor_Top_Level : declare
7025 Named_Entity : Entity_Id;
7029 Check_No_Identifiers;
7030 Check_Arg_Count (1);
7031 Check_Arg_Is_Local_Name (Arg1);
7032 Named_Entity := Entity (Expression (Arg1));
7034 -- If it's an access-to-subprogram type (in particular, not a
7035 -- subtype), set the flag on that type.
7037 if Is_Access_Subprogram_Type (Named_Entity) then
7038 Set_Can_Use_Internal_Rep (Named_Entity, False);
7040 -- Otherwise it's an error (name denotes the wrong sort of entity)
7044 ("access-to-subprogram type expected", Expression (Arg1));
7046 end Favor_Top_Level;
7052 -- pragma Fast_Math;
7054 when Pragma_Fast_Math =>
7056 Check_No_Identifiers;
7057 Check_Valid_Configuration_Pragma;
7060 ---------------------------
7061 -- Finalize_Storage_Only --
7062 ---------------------------
7064 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
7066 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
7067 Assoc : constant Node_Id := Arg1;
7068 Type_Id : constant Node_Id := Expression (Assoc);
7072 Check_No_Identifiers;
7073 Check_Arg_Count (1);
7074 Check_Arg_Is_Local_Name (Arg1);
7076 Find_Type (Type_Id);
7077 Typ := Entity (Type_Id);
7080 or else Rep_Item_Too_Early (Typ, N)
7084 Typ := Underlying_Type (Typ);
7087 if not Is_Controlled (Typ) then
7088 Error_Pragma ("pragma% must specify controlled type");
7091 Check_First_Subtype (Arg1);
7093 if Finalize_Storage_Only (Typ) then
7094 Error_Pragma ("duplicate pragma%, only one allowed");
7096 elsif not Rep_Item_Too_Late (Typ, N) then
7097 Set_Finalize_Storage_Only (Base_Type (Typ), True);
7099 end Finalize_Storage;
7101 --------------------------
7102 -- Float_Representation --
7103 --------------------------
7105 -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
7107 -- FLOAT_REP ::= VAX_Float | IEEE_Float
7109 when Pragma_Float_Representation => Float_Representation : declare
7117 if Arg_Count = 1 then
7118 Check_Valid_Configuration_Pragma;
7120 Check_Arg_Count (2);
7121 Check_Optional_Identifier (Arg2, Name_Entity);
7122 Check_Arg_Is_Local_Name (Arg2);
7125 Check_No_Identifier (Arg1);
7126 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
7128 if not OpenVMS_On_Target then
7129 if Chars (Expression (Arg1)) = Name_VAX_Float then
7131 ("?pragma% ignored (applies only to Open'V'M'S)");
7137 -- One argument case
7139 if Arg_Count = 1 then
7140 if Chars (Expression (Arg1)) = Name_VAX_Float then
7141 if Opt.Float_Format = 'I' then
7142 Error_Pragma ("'I'E'E'E format previously specified");
7145 Opt.Float_Format := 'V';
7148 if Opt.Float_Format = 'V' then
7149 Error_Pragma ("'V'A'X format previously specified");
7152 Opt.Float_Format := 'I';
7155 Set_Standard_Fpt_Formats;
7157 -- Two argument case
7160 Argx := Get_Pragma_Arg (Arg2);
7162 if not Is_Entity_Name (Argx)
7163 or else not Is_Floating_Point_Type (Entity (Argx))
7166 ("second argument of% pragma must be floating-point type",
7170 Ent := Entity (Argx);
7171 Digs := UI_To_Int (Digits_Value (Ent));
7173 -- Two arguments, VAX_Float case
7175 if Chars (Expression (Arg1)) = Name_VAX_Float then
7177 when 6 => Set_F_Float (Ent);
7178 when 9 => Set_D_Float (Ent);
7179 when 15 => Set_G_Float (Ent);
7183 ("wrong digits value, must be 6,9 or 15", Arg2);
7186 -- Two arguments, IEEE_Float case
7190 when 6 => Set_IEEE_Short (Ent);
7191 when 15 => Set_IEEE_Long (Ent);
7195 ("wrong digits value, must be 6 or 15", Arg2);
7199 end Float_Representation;
7205 -- pragma Ident (static_string_EXPRESSION)
7207 -- Note: pragma Comment shares this processing. Pragma Comment
7208 -- is identical to Ident, except that the restriction of the
7209 -- argument to 31 characters and the placement restrictions
7210 -- are not enforced for pragma Comment.
7212 when Pragma_Ident | Pragma_Comment => Ident : declare
7217 Check_Arg_Count (1);
7218 Check_No_Identifiers;
7219 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7221 -- For pragma Ident, preserve DEC compatibility by requiring
7222 -- the pragma to appear in a declarative part or package spec.
7224 if Prag_Id = Pragma_Ident then
7225 Check_Is_In_Decl_Part_Or_Package_Spec;
7228 Str := Expr_Value_S (Expression (Arg1));
7235 GP := Parent (Parent (N));
7237 if Nkind (GP) = N_Package_Declaration
7239 Nkind (GP) = N_Generic_Package_Declaration
7244 -- If we have a compilation unit, then record the ident
7245 -- value, checking for improper duplication.
7247 if Nkind (GP) = N_Compilation_Unit then
7248 CS := Ident_String (Current_Sem_Unit);
7250 if Present (CS) then
7252 -- For Ident, we do not permit multiple instances
7254 if Prag_Id = Pragma_Ident then
7255 Error_Pragma ("duplicate% pragma not permitted");
7257 -- For Comment, we concatenate the string, unless we
7258 -- want to preserve the tree structure for ASIS.
7260 elsif not ASIS_Mode then
7261 Start_String (Strval (CS));
7262 Store_String_Char (' ');
7263 Store_String_Chars (Strval (Str));
7264 Set_Strval (CS, End_String);
7268 -- In VMS, the effect of IDENT is achieved by passing
7269 -- IDENTIFICATION=name as a --for-linker switch.
7271 if OpenVMS_On_Target then
7274 ("--for-linker=IDENTIFICATION=");
7275 String_To_Name_Buffer (Strval (Str));
7276 Store_String_Chars (Name_Buffer (1 .. Name_Len));
7278 -- Only the last processed IDENT is saved. The main
7279 -- purpose is so an IDENT associated with a main
7280 -- procedure will be used in preference to an IDENT
7281 -- associated with a with'd package.
7283 Replace_Linker_Option_String
7284 (End_String, "--for-linker=IDENTIFICATION=");
7287 Set_Ident_String (Current_Sem_Unit, Str);
7290 -- For subunits, we just ignore the Ident, since in GNAT
7291 -- these are not separate object files, and hence not
7292 -- separate units in the unit table.
7294 elsif Nkind (GP) = N_Subunit then
7297 -- Otherwise we have a misplaced pragma Ident, but we ignore
7298 -- this if we are in an instantiation, since it comes from
7299 -- a generic, and has no relevance to the instantiation.
7301 elsif Prag_Id = Pragma_Ident then
7302 if Instantiation_Location (Loc) = No_Location then
7303 Error_Pragma ("pragma% only allowed at outer level");
7309 --------------------------
7310 -- Implemented_By_Entry --
7311 --------------------------
7313 -- pragma Implemented_By_Entry (DIRECT_NAME);
7315 when Pragma_Implemented_By_Entry => Implemented_By_Entry : declare
7320 Check_Arg_Count (1);
7321 Check_No_Identifiers;
7322 Check_Arg_Is_Identifier (Arg1);
7323 Check_Arg_Is_Local_Name (Arg1);
7324 Ent := Entity (Expression (Arg1));
7326 -- Pragma Implemented_By_Entry must be applied only to protected
7327 -- synchronized or task interface primitives.
7329 if (Ekind (Ent) /= E_Function
7330 and then Ekind (Ent) /= E_Procedure)
7331 or else not Present (First_Formal (Ent))
7332 or else not Is_Concurrent_Interface (Etype (First_Formal (Ent)))
7335 ("pragma % must be applied to a concurrent interface " &
7339 if Einfo.Implemented_By_Entry (Ent)
7340 and then Warn_On_Redundant_Constructs
7342 Error_Pragma ("?duplicate pragma%!");
7344 Set_Implemented_By_Entry (Ent);
7347 end Implemented_By_Entry;
7349 -----------------------
7350 -- Implicit_Packing --
7351 -----------------------
7353 -- pragma Implicit_Packing;
7355 when Pragma_Implicit_Packing =>
7357 Check_Arg_Count (0);
7358 Implicit_Packing := True;
7365 -- [Convention =>] convention_IDENTIFIER,
7366 -- [Entity =>] local_NAME
7367 -- [, [External_Name =>] static_string_EXPRESSION ]
7368 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7370 when Pragma_Import =>
7371 Check_Ada_83_Warning;
7377 Check_At_Least_N_Arguments (2);
7378 Check_At_Most_N_Arguments (4);
7379 Process_Import_Or_Interface;
7381 ----------------------
7382 -- Import_Exception --
7383 ----------------------
7385 -- pragma Import_Exception (
7386 -- [Internal =>] LOCAL_NAME
7387 -- [, [External =>] EXTERNAL_SYMBOL]
7388 -- [, [Form =>] Ada | VMS]
7389 -- [, [Code =>] static_integer_EXPRESSION]);
7391 when Pragma_Import_Exception => Import_Exception : declare
7392 Args : Args_List (1 .. 4);
7393 Names : constant Name_List (1 .. 4) := (
7399 Internal : Node_Id renames Args (1);
7400 External : Node_Id renames Args (2);
7401 Form : Node_Id renames Args (3);
7402 Code : Node_Id renames Args (4);
7405 Gather_Associations (Names, Args);
7407 if Present (External) and then Present (Code) then
7409 ("cannot give both External and Code options for pragma%");
7412 Process_Extended_Import_Export_Exception_Pragma (
7413 Arg_Internal => Internal,
7414 Arg_External => External,
7418 if not Is_VMS_Exception (Entity (Internal)) then
7419 Set_Imported (Entity (Internal));
7421 end Import_Exception;
7423 ---------------------
7424 -- Import_Function --
7425 ---------------------
7427 -- pragma Import_Function (
7428 -- [Internal =>] LOCAL_NAME,
7429 -- [, [External =>] EXTERNAL_SYMBOL]
7430 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7431 -- [, [Result_Type =>] SUBTYPE_MARK]
7432 -- [, [Mechanism =>] MECHANISM]
7433 -- [, [Result_Mechanism =>] MECHANISM_NAME]
7434 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7436 -- EXTERNAL_SYMBOL ::=
7438 -- | static_string_EXPRESSION
7440 -- PARAMETER_TYPES ::=
7442 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7444 -- TYPE_DESIGNATOR ::=
7446 -- | subtype_Name ' Access
7450 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7452 -- MECHANISM_ASSOCIATION ::=
7453 -- [formal_parameter_NAME =>] MECHANISM_NAME
7455 -- MECHANISM_NAME ::=
7458 -- | Descriptor [([Class =>] CLASS_NAME)]
7460 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7462 when Pragma_Import_Function => Import_Function : declare
7463 Args : Args_List (1 .. 7);
7464 Names : constant Name_List (1 .. 7) := (
7467 Name_Parameter_Types,
7470 Name_Result_Mechanism,
7471 Name_First_Optional_Parameter);
7473 Internal : Node_Id renames Args (1);
7474 External : Node_Id renames Args (2);
7475 Parameter_Types : Node_Id renames Args (3);
7476 Result_Type : Node_Id renames Args (4);
7477 Mechanism : Node_Id renames Args (5);
7478 Result_Mechanism : Node_Id renames Args (6);
7479 First_Optional_Parameter : Node_Id renames Args (7);
7483 Gather_Associations (Names, Args);
7484 Process_Extended_Import_Export_Subprogram_Pragma (
7485 Arg_Internal => Internal,
7486 Arg_External => External,
7487 Arg_Parameter_Types => Parameter_Types,
7488 Arg_Result_Type => Result_Type,
7489 Arg_Mechanism => Mechanism,
7490 Arg_Result_Mechanism => Result_Mechanism,
7491 Arg_First_Optional_Parameter => First_Optional_Parameter);
7492 end Import_Function;
7498 -- pragma Import_Object (
7499 -- [Internal =>] LOCAL_NAME
7500 -- [, [External =>] EXTERNAL_SYMBOL]
7501 -- [, [Size =>] EXTERNAL_SYMBOL]);
7503 -- EXTERNAL_SYMBOL ::=
7505 -- | static_string_EXPRESSION
7507 when Pragma_Import_Object => Import_Object : declare
7508 Args : Args_List (1 .. 3);
7509 Names : constant Name_List (1 .. 3) := (
7514 Internal : Node_Id renames Args (1);
7515 External : Node_Id renames Args (2);
7516 Size : Node_Id renames Args (3);
7520 Gather_Associations (Names, Args);
7521 Process_Extended_Import_Export_Object_Pragma (
7522 Arg_Internal => Internal,
7523 Arg_External => External,
7527 ----------------------
7528 -- Import_Procedure --
7529 ----------------------
7531 -- pragma Import_Procedure (
7532 -- [Internal =>] LOCAL_NAME
7533 -- [, [External =>] EXTERNAL_SYMBOL]
7534 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7535 -- [, [Mechanism =>] MECHANISM]
7536 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7538 -- EXTERNAL_SYMBOL ::=
7540 -- | static_string_EXPRESSION
7542 -- PARAMETER_TYPES ::=
7544 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7546 -- TYPE_DESIGNATOR ::=
7548 -- | subtype_Name ' Access
7552 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7554 -- MECHANISM_ASSOCIATION ::=
7555 -- [formal_parameter_NAME =>] MECHANISM_NAME
7557 -- MECHANISM_NAME ::=
7560 -- | Descriptor [([Class =>] CLASS_NAME)]
7562 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7564 when Pragma_Import_Procedure => Import_Procedure : declare
7565 Args : Args_List (1 .. 5);
7566 Names : constant Name_List (1 .. 5) := (
7569 Name_Parameter_Types,
7571 Name_First_Optional_Parameter);
7573 Internal : Node_Id renames Args (1);
7574 External : Node_Id renames Args (2);
7575 Parameter_Types : Node_Id renames Args (3);
7576 Mechanism : Node_Id renames Args (4);
7577 First_Optional_Parameter : Node_Id renames Args (5);
7581 Gather_Associations (Names, Args);
7582 Process_Extended_Import_Export_Subprogram_Pragma (
7583 Arg_Internal => Internal,
7584 Arg_External => External,
7585 Arg_Parameter_Types => Parameter_Types,
7586 Arg_Mechanism => Mechanism,
7587 Arg_First_Optional_Parameter => First_Optional_Parameter);
7588 end Import_Procedure;
7590 -----------------------------
7591 -- Import_Valued_Procedure --
7592 -----------------------------
7594 -- pragma Import_Valued_Procedure (
7595 -- [Internal =>] LOCAL_NAME
7596 -- [, [External =>] EXTERNAL_SYMBOL]
7597 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7598 -- [, [Mechanism =>] MECHANISM]
7599 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7601 -- EXTERNAL_SYMBOL ::=
7603 -- | static_string_EXPRESSION
7605 -- PARAMETER_TYPES ::=
7607 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7609 -- TYPE_DESIGNATOR ::=
7611 -- | subtype_Name ' Access
7615 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7617 -- MECHANISM_ASSOCIATION ::=
7618 -- [formal_parameter_NAME =>] MECHANISM_NAME
7620 -- MECHANISM_NAME ::=
7623 -- | Descriptor [([Class =>] CLASS_NAME)]
7625 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7627 when Pragma_Import_Valued_Procedure =>
7628 Import_Valued_Procedure : declare
7629 Args : Args_List (1 .. 5);
7630 Names : constant Name_List (1 .. 5) := (
7633 Name_Parameter_Types,
7635 Name_First_Optional_Parameter);
7637 Internal : Node_Id renames Args (1);
7638 External : Node_Id renames Args (2);
7639 Parameter_Types : Node_Id renames Args (3);
7640 Mechanism : Node_Id renames Args (4);
7641 First_Optional_Parameter : Node_Id renames Args (5);
7645 Gather_Associations (Names, Args);
7646 Process_Extended_Import_Export_Subprogram_Pragma (
7647 Arg_Internal => Internal,
7648 Arg_External => External,
7649 Arg_Parameter_Types => Parameter_Types,
7650 Arg_Mechanism => Mechanism,
7651 Arg_First_Optional_Parameter => First_Optional_Parameter);
7652 end Import_Valued_Procedure;
7654 ------------------------
7655 -- Initialize_Scalars --
7656 ------------------------
7658 -- pragma Initialize_Scalars;
7660 when Pragma_Initialize_Scalars =>
7662 Check_Arg_Count (0);
7663 Check_Valid_Configuration_Pragma;
7664 Check_Restriction (No_Initialize_Scalars, N);
7666 if not Restriction_Active (No_Initialize_Scalars) then
7667 Init_Or_Norm_Scalars := True;
7668 Initialize_Scalars := True;
7675 -- pragma Inline ( NAME {, NAME} );
7677 when Pragma_Inline =>
7679 -- Pragma is active if inlining option is active
7681 Process_Inline (Inline_Active);
7687 -- pragma Inline_Always ( NAME {, NAME} );
7689 when Pragma_Inline_Always =>
7690 Process_Inline (True);
7692 --------------------
7693 -- Inline_Generic --
7694 --------------------
7696 -- pragma Inline_Generic (NAME {, NAME});
7698 when Pragma_Inline_Generic =>
7699 Process_Generic_List;
7701 ----------------------
7702 -- Inspection_Point --
7703 ----------------------
7705 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
7707 when Pragma_Inspection_Point => Inspection_Point : declare
7712 if Arg_Count > 0 then
7715 Exp := Expression (Arg);
7718 if not Is_Entity_Name (Exp)
7719 or else not Is_Object (Entity (Exp))
7721 Error_Pragma_Arg ("object name required", Arg);
7728 end Inspection_Point;
7734 -- pragma Interface (
7735 -- [ Convention =>] convention_IDENTIFIER,
7736 -- [ Entity =>] local_NAME
7737 -- [, [External_Name =>] static_string_EXPRESSION ]
7738 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7740 when Pragma_Interface =>
7747 Check_At_Least_N_Arguments (2);
7748 Check_At_Most_N_Arguments (4);
7749 Process_Import_Or_Interface;
7751 --------------------
7752 -- Interface_Name --
7753 --------------------
7755 -- pragma Interface_Name (
7756 -- [ Entity =>] local_NAME
7757 -- [,[External_Name =>] static_string_EXPRESSION ]
7758 -- [,[Link_Name =>] static_string_EXPRESSION ]);
7760 when Pragma_Interface_Name => Interface_Name : declare
7769 ((Name_Entity, Name_External_Name, Name_Link_Name));
7770 Check_At_Least_N_Arguments (2);
7771 Check_At_Most_N_Arguments (3);
7772 Id := Expression (Arg1);
7775 if not Is_Entity_Name (Id) then
7777 ("first argument for pragma% must be entity name", Arg1);
7778 elsif Etype (Id) = Any_Type then
7781 Def_Id := Entity (Id);
7784 -- Special DEC-compatible processing for the object case, forces
7785 -- object to be imported.
7787 if Ekind (Def_Id) = E_Variable then
7788 Kill_Size_Check_Code (Def_Id);
7789 Note_Possible_Modification (Id, Sure => False);
7791 -- Initialization is not allowed for imported variable
7793 if Present (Expression (Parent (Def_Id)))
7794 and then Comes_From_Source (Expression (Parent (Def_Id)))
7796 Error_Msg_Sloc := Sloc (Def_Id);
7798 ("no initialization allowed for declaration of& #",
7802 -- For compatibility, support VADS usage of providing both
7803 -- pragmas Interface and Interface_Name to obtain the effect
7804 -- of a single Import pragma.
7806 if Is_Imported (Def_Id)
7807 and then Present (First_Rep_Item (Def_Id))
7808 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
7810 Pragma_Name (First_Rep_Item (Def_Id)) = Name_Interface
7814 Set_Imported (Def_Id);
7817 Set_Is_Public (Def_Id);
7818 Process_Interface_Name (Def_Id, Arg2, Arg3);
7821 -- Otherwise must be subprogram
7823 elsif not Is_Subprogram (Def_Id) then
7825 ("argument of pragma% is not subprogram", Arg1);
7828 Check_At_Most_N_Arguments (3);
7832 -- Loop through homonyms
7835 Def_Id := Get_Base_Subprogram (Hom_Id);
7837 if Is_Imported (Def_Id) then
7838 Process_Interface_Name (Def_Id, Arg2, Arg3);
7842 Hom_Id := Homonym (Hom_Id);
7844 exit when No (Hom_Id)
7845 or else Scope (Hom_Id) /= Current_Scope;
7850 ("argument of pragma% is not imported subprogram",
7856 -----------------------
7857 -- Interrupt_Handler --
7858 -----------------------
7860 -- pragma Interrupt_Handler (handler_NAME);
7862 when Pragma_Interrupt_Handler =>
7863 Check_Ada_83_Warning;
7864 Check_Arg_Count (1);
7865 Check_No_Identifiers;
7867 if No_Run_Time_Mode then
7868 Error_Msg_CRT ("Interrupt_Handler pragma", N);
7870 Check_Interrupt_Or_Attach_Handler;
7871 Process_Interrupt_Or_Attach_Handler;
7874 ------------------------
7875 -- Interrupt_Priority --
7876 ------------------------
7878 -- pragma Interrupt_Priority [(EXPRESSION)];
7880 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
7881 P : constant Node_Id := Parent (N);
7885 Check_Ada_83_Warning;
7887 if Arg_Count /= 0 then
7888 Arg := Expression (Arg1);
7889 Check_Arg_Count (1);
7890 Check_No_Identifiers;
7892 -- The expression must be analyzed in the special manner
7893 -- described in "Handling of Default and Per-Object
7894 -- Expressions" in sem.ads.
7896 Preanalyze_Spec_Expression (Arg, RTE (RE_Interrupt_Priority));
7899 if Nkind (P) /= N_Task_Definition
7900 and then Nkind (P) /= N_Protected_Definition
7905 elsif Has_Priority_Pragma (P) then
7906 Error_Pragma ("duplicate pragma% not allowed");
7909 Set_Has_Priority_Pragma (P, True);
7910 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7912 end Interrupt_Priority;
7914 ---------------------
7915 -- Interrupt_State --
7916 ---------------------
7918 -- pragma Interrupt_State (
7919 -- [Name =>] INTERRUPT_ID,
7920 -- [State =>] INTERRUPT_STATE);
7922 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
7923 -- INTERRUPT_STATE => System | Runtime | User
7925 -- Note: if the interrupt id is given as an identifier, then
7926 -- it must be one of the identifiers in Ada.Interrupts.Names.
7927 -- Otherwise it is given as a static integer expression which
7928 -- must be in the range of Ada.Interrupts.Interrupt_ID.
7930 when Pragma_Interrupt_State => Interrupt_State : declare
7932 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
7933 -- This is the entity Ada.Interrupts.Interrupt_ID;
7935 State_Type : Character;
7936 -- Set to 's'/'r'/'u' for System/Runtime/User
7939 -- Index to entry in Interrupt_States table
7942 -- Value of interrupt
7944 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
7945 -- The first argument to the pragma
7947 Int_Ent : Entity_Id;
7948 -- Interrupt entity in Ada.Interrupts.Names
7952 Check_Arg_Order ((Name_Name, Name_State));
7953 Check_Arg_Count (2);
7955 Check_Optional_Identifier (Arg1, Name_Name);
7956 Check_Optional_Identifier (Arg2, Name_State);
7957 Check_Arg_Is_Identifier (Arg2);
7959 -- First argument is identifier
7961 if Nkind (Arg1X) = N_Identifier then
7963 -- Search list of names in Ada.Interrupts.Names
7965 Int_Ent := First_Entity (RTE (RE_Names));
7967 if No (Int_Ent) then
7968 Error_Pragma_Arg ("invalid interrupt name", Arg1);
7970 elsif Chars (Int_Ent) = Chars (Arg1X) then
7971 Int_Val := Expr_Value (Constant_Value (Int_Ent));
7975 Next_Entity (Int_Ent);
7978 -- First argument is not an identifier, so it must be a
7979 -- static expression of type Ada.Interrupts.Interrupt_ID.
7982 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
7983 Int_Val := Expr_Value (Arg1X);
7985 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
7987 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
7990 ("value not in range of type " &
7991 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
7997 case Chars (Get_Pragma_Arg (Arg2)) is
7998 when Name_Runtime => State_Type := 'r';
7999 when Name_System => State_Type := 's';
8000 when Name_User => State_Type := 'u';
8003 Error_Pragma_Arg ("invalid interrupt state", Arg2);
8006 -- Check if entry is already stored
8008 IST_Num := Interrupt_States.First;
8010 -- If entry not found, add it
8012 if IST_Num > Interrupt_States.Last then
8013 Interrupt_States.Append
8014 ((Interrupt_Number => UI_To_Int (Int_Val),
8015 Interrupt_State => State_Type,
8016 Pragma_Loc => Loc));
8019 -- Case of entry for the same entry
8021 elsif Int_Val = Interrupt_States.Table (IST_Num).
8024 -- If state matches, done, no need to make redundant entry
8027 State_Type = Interrupt_States.Table (IST_Num).
8030 -- Otherwise if state does not match, error
8033 Interrupt_States.Table (IST_Num).Pragma_Loc;
8035 ("state conflicts with that given #", Arg2);
8039 IST_Num := IST_Num + 1;
8041 end Interrupt_State;
8043 ----------------------
8044 -- Java_Constructor --
8045 ----------------------
8047 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
8049 -- Also handles pragma CIL_Constructor
8051 when Pragma_CIL_Constructor | Pragma_Java_Constructor =>
8052 Java_Constructor : declare
8056 Convention : Convention_Id;
8060 Check_Arg_Count (1);
8061 Check_Optional_Identifier (Arg1, Name_Entity);
8062 Check_Arg_Is_Local_Name (Arg1);
8064 Id := Expression (Arg1);
8065 Find_Program_Unit_Name (Id);
8067 -- If we did not find the name, we are done
8069 if Etype (Id) = Any_Type then
8074 when Pragma_CIL_Constructor => Convention := Convention_CIL;
8075 when Pragma_Java_Constructor => Convention := Convention_Java;
8076 when others => null;
8079 Hom_Id := Entity (Id);
8081 -- Loop through homonyms
8084 Def_Id := Get_Base_Subprogram (Hom_Id);
8086 -- The constructor is required to be a function returning an
8087 -- access type whose designated type has convention Java/CIL.
8089 if Ekind (Def_Id) = E_Function
8091 (Is_Value_Type (Etype (Def_Id))
8093 (Ekind (Etype (Def_Id)) in Access_Kind
8096 (Designated_Type (Etype (Def_Id))) = Convention
8099 (Root_Type (Designated_Type (Etype (Def_Id)))) =
8102 Set_Is_Constructor (Def_Id);
8103 Set_Convention (Def_Id, Convention);
8104 Set_Is_Imported (Def_Id);
8107 if Convention = Convention_Java then
8109 ("pragma% requires function returning a " &
8110 "'Java access type", Arg1);
8112 pragma Assert (Convention = Convention_CIL);
8114 ("pragma% requires function returning a " &
8115 "'CIL access type", Arg1);
8119 Hom_Id := Homonym (Hom_Id);
8121 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
8123 end Java_Constructor;
8125 ----------------------
8126 -- Java_Interface --
8127 ----------------------
8129 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
8131 when Pragma_Java_Interface => Java_Interface : declare
8137 Check_Arg_Count (1);
8138 Check_Optional_Identifier (Arg1, Name_Entity);
8139 Check_Arg_Is_Local_Name (Arg1);
8141 Arg := Expression (Arg1);
8144 if Etype (Arg) = Any_Type then
8148 if not Is_Entity_Name (Arg)
8149 or else not Is_Type (Entity (Arg))
8151 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
8154 Typ := Underlying_Type (Entity (Arg));
8156 -- For now we simply check some of the semantic constraints
8157 -- on the type. This currently leaves out some restrictions
8158 -- on interface types, namely that the parent type must be
8159 -- java.lang.Object.Typ and that all primitives of the type
8160 -- should be declared abstract. ???
8162 if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then
8163 Error_Pragma_Arg ("pragma% requires an abstract "
8164 & "tagged type", Arg1);
8166 elsif not Has_Discriminants (Typ)
8167 or else Ekind (Etype (First_Discriminant (Typ)))
8168 /= E_Anonymous_Access_Type
8170 not Is_Class_Wide_Type
8171 (Designated_Type (Etype (First_Discriminant (Typ))))
8174 ("type must have a class-wide access discriminant", Arg1);
8182 -- pragma Keep_Names ([On => ] local_NAME);
8184 when Pragma_Keep_Names => Keep_Names : declare
8189 Check_Arg_Count (1);
8190 Check_Optional_Identifier (Arg1, Name_On);
8191 Check_Arg_Is_Local_Name (Arg1);
8193 Arg := Expression (Arg1);
8196 if Etype (Arg) = Any_Type then
8200 if not Is_Entity_Name (Arg)
8201 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
8204 ("pragma% requires a local enumeration type", Arg1);
8207 Set_Discard_Names (Entity (Arg), False);
8214 -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
8216 when Pragma_License =>
8218 Check_Arg_Count (1);
8219 Check_No_Identifiers;
8220 Check_Valid_Configuration_Pragma;
8221 Check_Arg_Is_Identifier (Arg1);
8224 Sind : constant Source_File_Index :=
8225 Source_Index (Current_Sem_Unit);
8228 case Chars (Get_Pragma_Arg (Arg1)) is
8230 Set_License (Sind, GPL);
8232 when Name_Modified_GPL =>
8233 Set_License (Sind, Modified_GPL);
8235 when Name_Restricted =>
8236 Set_License (Sind, Restricted);
8238 when Name_Unrestricted =>
8239 Set_License (Sind, Unrestricted);
8242 Error_Pragma_Arg ("invalid license name", Arg1);
8250 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
8252 when Pragma_Link_With => Link_With : declare
8258 if Operating_Mode = Generate_Code
8259 and then In_Extended_Main_Source_Unit (N)
8261 Check_At_Least_N_Arguments (1);
8262 Check_No_Identifiers;
8263 Check_Is_In_Decl_Part_Or_Package_Spec;
8264 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8268 while Present (Arg) loop
8269 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8271 -- Store argument, converting sequences of spaces
8272 -- to a single null character (this is one of the
8273 -- differences in processing between Link_With
8274 -- and Linker_Options).
8277 C : constant Char_Code := Get_Char_Code (' ');
8278 S : constant String_Id :=
8279 Strval (Expr_Value_S (Expression (Arg)));
8280 L : constant Nat := String_Length (S);
8283 procedure Skip_Spaces;
8284 -- Advance F past any spaces
8290 procedure Skip_Spaces is
8292 while F <= L and then Get_String_Char (S, F) = C loop
8297 -- Start of processing for Arg_Store
8300 Skip_Spaces; -- skip leading spaces
8302 -- Loop through characters, changing any embedded
8303 -- sequence of spaces to a single null character
8304 -- (this is how Link_With/Linker_Options differ)
8307 if Get_String_Char (S, F) = C then
8310 Store_String_Char (ASCII.NUL);
8313 Store_String_Char (Get_String_Char (S, F));
8321 if Present (Arg) then
8322 Store_String_Char (ASCII.NUL);
8326 Store_Linker_Option_String (End_String);
8334 -- pragma Linker_Alias (
8335 -- [Entity =>] LOCAL_NAME
8336 -- [Target =>] static_string_EXPRESSION);
8338 when Pragma_Linker_Alias =>
8340 Check_Arg_Order ((Name_Entity, Name_Target));
8341 Check_Arg_Count (2);
8342 Check_Optional_Identifier (Arg1, Name_Entity);
8343 Check_Optional_Identifier (Arg2, Name_Target);
8344 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8345 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8347 -- The only processing required is to link this item on to the
8348 -- list of rep items for the given entity. This is accomplished
8349 -- by the call to Rep_Item_Too_Late (when no error is detected
8350 -- and False is returned).
8352 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8355 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8358 ------------------------
8359 -- Linker_Constructor --
8360 ------------------------
8362 -- pragma Linker_Constructor (procedure_LOCAL_NAME);
8364 -- Code is shared with Linker_Destructor
8366 -----------------------
8367 -- Linker_Destructor --
8368 -----------------------
8370 -- pragma Linker_Destructor (procedure_LOCAL_NAME);
8372 when Pragma_Linker_Constructor |
8373 Pragma_Linker_Destructor =>
8374 Linker_Constructor : declare
8380 Check_Arg_Count (1);
8381 Check_No_Identifiers;
8382 Check_Arg_Is_Local_Name (Arg1);
8383 Arg1_X := Expression (Arg1);
8385 Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
8387 if not Is_Library_Level_Entity (Proc) then
8389 ("argument for pragma% must be library level entity", Arg1);
8392 -- The only processing required is to link this item on to the
8393 -- list of rep items for the given entity. This is accomplished
8394 -- by the call to Rep_Item_Too_Late (when no error is detected
8395 -- and False is returned).
8397 if Rep_Item_Too_Late (Proc, N) then
8400 Set_Has_Gigi_Rep_Item (Proc);
8402 end Linker_Constructor;
8404 --------------------
8405 -- Linker_Options --
8406 --------------------
8408 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
8410 when Pragma_Linker_Options => Linker_Options : declare
8414 Check_Ada_83_Warning;
8415 Check_No_Identifiers;
8416 Check_Arg_Count (1);
8417 Check_Is_In_Decl_Part_Or_Package_Spec;
8418 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8419 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
8422 while Present (Arg) loop
8423 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8424 Store_String_Char (ASCII.NUL);
8425 Store_String_Chars (Strval (Expr_Value_S (Expression (Arg))));
8429 if Operating_Mode = Generate_Code
8430 and then In_Extended_Main_Source_Unit (N)
8432 Store_Linker_Option_String (End_String);
8436 --------------------
8437 -- Linker_Section --
8438 --------------------
8440 -- pragma Linker_Section (
8441 -- [Entity =>] LOCAL_NAME
8442 -- [Section =>] static_string_EXPRESSION);
8444 when Pragma_Linker_Section =>
8446 Check_Arg_Order ((Name_Entity, Name_Section));
8447 Check_Arg_Count (2);
8448 Check_Optional_Identifier (Arg1, Name_Entity);
8449 Check_Optional_Identifier (Arg2, Name_Section);
8450 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8451 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8453 -- The only processing required is to link this item on to the
8454 -- list of rep items for the given entity. This is accomplished
8455 -- by the call to Rep_Item_Too_Late (when no error is detected
8456 -- and False is returned).
8458 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8461 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8468 -- pragma List (On | Off)
8470 -- There is nothing to do here, since we did all the processing
8471 -- for this pragma in Par.Prag (so that it works properly even in
8472 -- syntax only mode)
8477 --------------------
8478 -- Locking_Policy --
8479 --------------------
8481 -- pragma Locking_Policy (policy_IDENTIFIER);
8483 when Pragma_Locking_Policy => declare
8487 Check_Ada_83_Warning;
8488 Check_Arg_Count (1);
8489 Check_No_Identifiers;
8490 Check_Arg_Is_Locking_Policy (Arg1);
8491 Check_Valid_Configuration_Pragma;
8492 Get_Name_String (Chars (Expression (Arg1)));
8493 LP := Fold_Upper (Name_Buffer (1));
8495 if Locking_Policy /= ' '
8496 and then Locking_Policy /= LP
8498 Error_Msg_Sloc := Locking_Policy_Sloc;
8499 Error_Pragma ("locking policy incompatible with policy#");
8501 -- Set new policy, but always preserve System_Location since
8502 -- we like the error message with the run time name.
8505 Locking_Policy := LP;
8507 if Locking_Policy_Sloc /= System_Location then
8508 Locking_Policy_Sloc := Loc;
8517 -- pragma Long_Float (D_Float | G_Float);
8519 when Pragma_Long_Float =>
8521 Check_Valid_Configuration_Pragma;
8522 Check_Arg_Count (1);
8523 Check_No_Identifier (Arg1);
8524 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
8526 if not OpenVMS_On_Target then
8527 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
8532 if Chars (Expression (Arg1)) = Name_D_Float then
8533 if Opt.Float_Format_Long = 'G' then
8534 Error_Pragma ("G_Float previously specified");
8537 Opt.Float_Format_Long := 'D';
8539 -- G_Float case (this is the default, does not need overriding)
8542 if Opt.Float_Format_Long = 'D' then
8543 Error_Pragma ("D_Float previously specified");
8546 Opt.Float_Format_Long := 'G';
8549 Set_Standard_Fpt_Formats;
8551 -----------------------
8552 -- Machine_Attribute --
8553 -----------------------
8555 -- pragma Machine_Attribute (
8556 -- [Entity =>] LOCAL_NAME,
8557 -- [Attribute_Name =>] static_string_EXPRESSION
8558 -- [, [Info =>] static_string_EXPRESSION] );
8560 when Pragma_Machine_Attribute => Machine_Attribute : declare
8565 Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
8567 if Arg_Count = 3 then
8568 Check_Optional_Identifier (Arg3, Name_Info);
8569 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
8571 Check_Arg_Count (2);
8574 Check_Optional_Identifier (Arg1, Name_Entity);
8575 Check_Optional_Identifier (Arg2, Name_Attribute_Name);
8576 Check_Arg_Is_Local_Name (Arg1);
8577 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8578 Def_Id := Entity (Expression (Arg1));
8580 if Is_Access_Type (Def_Id) then
8581 Def_Id := Designated_Type (Def_Id);
8584 if Rep_Item_Too_Early (Def_Id, N) then
8588 Def_Id := Underlying_Type (Def_Id);
8590 -- The only processing required is to link this item on to the
8591 -- list of rep items for the given entity. This is accomplished
8592 -- by the call to Rep_Item_Too_Late (when no error is detected
8593 -- and False is returned).
8595 if Rep_Item_Too_Late (Def_Id, N) then
8598 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8600 end Machine_Attribute;
8607 -- (MAIN_OPTION [, MAIN_OPTION]);
8610 -- [STACK_SIZE =>] static_integer_EXPRESSION
8611 -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION
8612 -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION
8614 when Pragma_Main => Main : declare
8615 Args : Args_List (1 .. 3);
8616 Names : constant Name_List (1 .. 3) := (
8618 Name_Task_Stack_Size_Default,
8619 Name_Time_Slicing_Enabled);
8625 Gather_Associations (Names, Args);
8627 for J in 1 .. 2 loop
8628 if Present (Args (J)) then
8629 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8633 if Present (Args (3)) then
8634 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
8638 while Present (Nod) loop
8639 if Nkind (Nod) = N_Pragma
8640 and then Pragma_Name (Nod) = Name_Main
8642 Error_Msg_Name_1 := Pname;
8643 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8654 -- pragma Main_Storage
8655 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
8657 -- MAIN_STORAGE_OPTION ::=
8658 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
8659 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
8661 when Pragma_Main_Storage => Main_Storage : declare
8662 Args : Args_List (1 .. 2);
8663 Names : constant Name_List (1 .. 2) := (
8664 Name_Working_Storage,
8671 Gather_Associations (Names, Args);
8673 for J in 1 .. 2 loop
8674 if Present (Args (J)) then
8675 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8679 Check_In_Main_Program;
8682 while Present (Nod) loop
8683 if Nkind (Nod) = N_Pragma
8684 and then Pragma_Name (Nod) = Name_Main_Storage
8686 Error_Msg_Name_1 := Pname;
8687 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8698 -- pragma Memory_Size (NUMERIC_LITERAL)
8700 when Pragma_Memory_Size =>
8703 -- Memory size is simply ignored
8705 Check_No_Identifiers;
8706 Check_Arg_Count (1);
8707 Check_Arg_Is_Integer_Literal (Arg1);
8715 -- The only correct use of this pragma is on its own in a file, in
8716 -- which case it is specially processed (see Gnat1drv.Check_Bad_Body
8717 -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to
8718 -- check for a file containing nothing but a No_Body pragma). If we
8719 -- attempt to process it during normal semantics processing, it means
8720 -- it was misplaced.
8722 when Pragma_No_Body =>
8729 -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
8731 when Pragma_No_Return => No_Return : declare
8739 Check_At_Least_N_Arguments (1);
8741 -- Loop through arguments of pragma
8744 while Present (Arg) loop
8745 Check_Arg_Is_Local_Name (Arg);
8746 Id := Expression (Arg);
8749 if not Is_Entity_Name (Id) then
8750 Error_Pragma_Arg ("entity name required", Arg);
8753 if Etype (Id) = Any_Type then
8757 -- Loop to find matching procedures
8762 and then Scope (E) = Current_Scope
8764 if Ekind (E) = E_Procedure
8765 or else Ekind (E) = E_Generic_Procedure
8769 -- Set flag on any alias as well
8771 if Is_Overloadable (E) and then Present (Alias (E)) then
8772 Set_No_Return (Alias (E));
8782 Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
8789 ------------------------
8790 -- No_Strict_Aliasing --
8791 ------------------------
8793 -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
8795 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
8800 Check_At_Most_N_Arguments (1);
8802 if Arg_Count = 0 then
8803 Check_Valid_Configuration_Pragma;
8804 Opt.No_Strict_Aliasing := True;
8807 Check_Optional_Identifier (Arg2, Name_Entity);
8808 Check_Arg_Is_Local_Name (Arg1);
8809 E_Id := Entity (Expression (Arg1));
8811 if E_Id = Any_Type then
8813 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
8814 Error_Pragma_Arg ("pragma% requires access type", Arg1);
8817 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
8819 end No_Strict_Alias;
8825 -- pragma Obsolescent [(
8826 -- [Entity => NAME,]
8827 -- [(static_string_EXPRESSION [, Ada_05])];
8829 when Pragma_Obsolescent => Obsolescent : declare
8833 procedure Set_Obsolescent (E : Entity_Id);
8834 -- Given an entity Ent, mark it as obsolescent if appropriate
8836 ---------------------
8837 -- Set_Obsolescent --
8838 ---------------------
8840 procedure Set_Obsolescent (E : Entity_Id) is
8849 -- Entity name was given
8851 if Present (Ename) then
8853 -- If entity name matches, we are fine
8855 if Chars (Ename) = Chars (Ent) then
8858 -- If entity name does not match, only possibility is an
8859 -- enumeration literal from an enumeration type declaration.
8861 elsif Ekind (Ent) /= E_Enumeration_Type then
8863 ("pragma % entity name does not match declaration");
8866 Ent := First_Literal (E);
8870 ("pragma % entity name does not match any " &
8871 "enumeration literal");
8873 elsif Chars (Ent) = Chars (Ename) then
8877 Ent := Next_Literal (Ent);
8883 -- Ent points to entity to be marked
8885 if Arg_Count >= 1 then
8887 -- Deal with static string argument
8889 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8890 S := Strval (Expression (Arg1));
8892 for J in 1 .. String_Length (S) loop
8893 if not In_Character_Range (Get_String_Char (S, J)) then
8895 ("pragma% argument does not allow wide characters",
8900 Obsolescent_Warnings.Append
8901 ((Ent => Ent, Msg => Strval (Expression (Arg1))));
8903 -- Check for Ada_05 parameter
8905 if Arg_Count /= 1 then
8906 Check_Arg_Count (2);
8909 Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
8912 Check_Arg_Is_Identifier (Argx);
8914 if Chars (Argx) /= Name_Ada_05 then
8915 Error_Msg_Name_2 := Name_Ada_05;
8917 ("only allowed argument for pragma% is %", Argx);
8920 if Ada_Version_Explicit < Ada_05
8921 or else not Warn_On_Ada_2005_Compatibility
8929 -- Set flag if pragma active
8932 Set_Is_Obsolescent (Ent);
8936 end Set_Obsolescent;
8938 -- Start of processing for pragma Obsolescent
8943 Check_At_Most_N_Arguments (3);
8945 -- See if first argument specifies an entity name
8948 and then Chars (Arg1) = Name_Entity
8950 Ename := Get_Pragma_Arg (Arg1);
8952 if Nkind (Ename) /= N_Character_Literal
8954 Nkind (Ename) /= N_Identifier
8956 Nkind (Ename) /= N_Operator_Symbol
8958 Error_Pragma_Arg ("entity name expected for pragma%", Arg1);
8961 -- Eliminate first argument, so we can share processing
8965 Arg_Count := Arg_Count - 1;
8967 -- No Entity name argument given
8973 Check_No_Identifiers;
8975 -- Get immediately preceding declaration
8978 while Present (Decl) and then Nkind (Decl) = N_Pragma loop
8982 -- Cases where we do not follow anything other than another pragma
8986 -- First case: library level compilation unit declaration with
8987 -- the pragma immediately following the declaration.
8989 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
8991 (Defining_Entity (Unit (Parent (Parent (N)))));
8994 -- Case 2: library unit placement for package
8998 Ent : constant Entity_Id := Find_Lib_Unit_Name;
9000 if Ekind (Ent) = E_Package
9001 or else Ekind (Ent) = E_Generic_Package
9003 Set_Obsolescent (Ent);
9009 -- Cases where we must follow a declaration
9012 if Nkind (Decl) not in N_Declaration
9013 and then Nkind (Decl) not in N_Later_Decl_Item
9014 and then Nkind (Decl) not in N_Generic_Declaration
9017 ("pragma% misplaced, " &
9018 "must immediately follow a declaration");
9021 Set_Obsolescent (Defining_Entity (Decl));
9031 -- pragma No_Run_Time
9033 -- Note: this pragma is retained for backwards compatibility.
9034 -- See body of Rtsfind for full details on its handling.
9036 when Pragma_No_Run_Time =>
9038 Check_Valid_Configuration_Pragma;
9039 Check_Arg_Count (0);
9041 No_Run_Time_Mode := True;
9042 Configurable_Run_Time_Mode := True;
9044 -- Set Duration to 32 bits if word size is 32
9046 if Ttypes.System_Word_Size = 32 then
9047 Duration_32_Bits_On_Target := True;
9050 -- Set appropriate restrictions
9052 Set_Restriction (No_Finalization, N);
9053 Set_Restriction (No_Exception_Handlers, N);
9054 Set_Restriction (Max_Tasks, N, 0);
9055 Set_Restriction (No_Tasking, N);
9057 -----------------------
9058 -- Normalize_Scalars --
9059 -----------------------
9061 -- pragma Normalize_Scalars;
9063 when Pragma_Normalize_Scalars =>
9064 Check_Ada_83_Warning;
9065 Check_Arg_Count (0);
9066 Check_Valid_Configuration_Pragma;
9067 Normalize_Scalars := True;
9068 Init_Or_Norm_Scalars := True;
9074 -- pragma Optimize (Time | Space | Off);
9076 -- The actual check for optimize is done in Gigi. Note that this
9077 -- pragma does not actually change the optimization setting, it
9078 -- simply checks that it is consistent with the pragma.
9080 when Pragma_Optimize =>
9081 Check_No_Identifiers;
9082 Check_Arg_Count (1);
9083 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
9085 ------------------------
9086 -- Optimize_Alignment --
9087 ------------------------
9089 -- pragma Optimize_Alignment (Time | Space | Off);
9091 when Pragma_Optimize_Alignment =>
9093 Check_No_Identifiers;
9094 Check_Arg_Count (1);
9095 Check_Valid_Configuration_Pragma;
9098 Nam : constant Name_Id := Chars (Get_Pragma_Arg (Arg1));
9102 Opt.Optimize_Alignment := 'T';
9104 Opt.Optimize_Alignment := 'S';
9106 Opt.Optimize_Alignment := 'O';
9108 Error_Pragma_Arg ("invalid argument for pragma%", Arg1);
9112 -- Set indication that mode is set locally. If we are in fact in a
9113 -- configuration pragma file, this setting is harmless since the
9114 -- switch will get reset anyway at the start of each unit.
9116 Optimize_Alignment_Local := True;
9122 -- pragma Pack (first_subtype_LOCAL_NAME);
9124 when Pragma_Pack => Pack : declare
9125 Assoc : constant Node_Id := Arg1;
9130 Check_No_Identifiers;
9131 Check_Arg_Count (1);
9132 Check_Arg_Is_Local_Name (Arg1);
9134 Type_Id := Expression (Assoc);
9135 Find_Type (Type_Id);
9136 Typ := Entity (Type_Id);
9139 or else Rep_Item_Too_Early (Typ, N)
9143 Typ := Underlying_Type (Typ);
9146 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
9147 Error_Pragma ("pragma% must specify array or record type");
9150 Check_First_Subtype (Arg1);
9152 if Has_Pragma_Pack (Typ) then
9153 Error_Pragma ("duplicate pragma%, only one allowed");
9157 elsif Is_Array_Type (Typ) then
9159 -- Pack not allowed for aliased or atomic components
9161 if Has_Aliased_Components (Base_Type (Typ)) then
9163 ("pragma% ignored, cannot pack aliased components?");
9165 elsif Has_Atomic_Components (Typ)
9166 or else Is_Atomic (Component_Type (Typ))
9169 ("?pragma% ignored, cannot pack atomic components");
9172 -- If we had an explicit component size given, then we do not
9173 -- let Pack override this given size. We also give a warning
9174 -- that Pack is being ignored unless we can tell for sure that
9175 -- the Pack would not have had any effect anyway.
9177 if Has_Component_Size_Clause (Typ) then
9178 if Known_Static_RM_Size (Component_Type (Typ))
9180 RM_Size (Component_Type (Typ)) = Component_Size (Typ)
9185 ("?pragma% ignored, explicit component size given");
9188 -- If no prior array component size given, Pack is effective
9191 if not Rep_Item_Too_Late (Typ, N) then
9192 if VM_Target = No_VM then
9193 Set_Is_Packed (Base_Type (Typ));
9194 elsif not GNAT_Mode then
9196 ("?pragma% ignored in this configuration");
9199 Set_Has_Pragma_Pack (Base_Type (Typ));
9200 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9204 -- For record types, the pack is always effective
9206 else pragma Assert (Is_Record_Type (Typ));
9207 if not Rep_Item_Too_Late (Typ, N) then
9208 if VM_Target = No_VM then
9209 Set_Is_Packed (Base_Type (Typ));
9210 elsif not GNAT_Mode then
9211 Error_Pragma ("?pragma% ignored in this configuration");
9214 Set_Has_Pragma_Pack (Base_Type (Typ));
9215 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9226 -- There is nothing to do here, since we did all the processing
9227 -- for this pragma in Par.Prag (so that it works properly even in
9228 -- syntax only mode)
9237 -- pragma Passive [(PASSIVE_FORM)];
9239 -- PASSIVE_FORM ::= Semaphore | No
9241 when Pragma_Passive =>
9244 if Nkind (Parent (N)) /= N_Task_Definition then
9245 Error_Pragma ("pragma% must be within task definition");
9248 if Arg_Count /= 0 then
9249 Check_Arg_Count (1);
9250 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
9253 ----------------------------------
9254 -- Preelaborable_Initialization --
9255 ----------------------------------
9257 -- pragma Preelaborable_Initialization (DIRECT_NAME);
9259 when Pragma_Preelaborable_Initialization => Preelab_Init : declare
9264 Check_Arg_Count (1);
9265 Check_No_Identifiers;
9266 Check_Arg_Is_Identifier (Arg1);
9267 Check_Arg_Is_Local_Name (Arg1);
9268 Check_First_Subtype (Arg1);
9269 Ent := Entity (Expression (Arg1));
9271 if not Is_Private_Type (Ent)
9272 and then not Is_Protected_Type (Ent)
9275 ("pragma % can only be applied to private or protected type",
9279 -- Give an error if the pragma is applied to a protected type that
9280 -- does not qualify (due to having entries, or due to components
9281 -- that do not qualify).
9283 if Is_Protected_Type (Ent)
9284 and then not Has_Preelaborable_Initialization (Ent)
9287 ("protected type & does not have preelaborable " &
9288 "initialization", Ent);
9290 -- Otherwise mark the type as definitely having preelaborable
9294 Set_Known_To_Have_Preelab_Init (Ent);
9297 if Has_Pragma_Preelab_Init (Ent)
9298 and then Warn_On_Redundant_Constructs
9300 Error_Pragma ("?duplicate pragma%!");
9302 Set_Has_Pragma_Preelab_Init (Ent);
9310 -- pragma Polling (ON | OFF);
9312 when Pragma_Polling =>
9314 Check_Arg_Count (1);
9315 Check_No_Identifiers;
9316 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9317 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
9319 --------------------
9320 -- Persistent_BSS --
9321 --------------------
9323 when Pragma_Persistent_BSS => Persistent_BSS : declare
9330 Check_At_Most_N_Arguments (1);
9332 -- Case of application to specific object (one argument)
9334 if Arg_Count = 1 then
9335 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9337 if not Is_Entity_Name (Expression (Arg1))
9339 (Ekind (Entity (Expression (Arg1))) /= E_Variable
9340 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
9342 Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
9345 Ent := Entity (Expression (Arg1));
9346 Decl := Parent (Ent);
9348 if Rep_Item_Too_Late (Ent, N) then
9352 if Present (Expression (Decl)) then
9354 ("object for pragma% cannot have initialization", Arg1);
9357 if not Is_Potentially_Persistent_Type (Etype (Ent)) then
9359 ("object type for pragma% is not potentially persistent",
9364 Make_Linker_Section_Pragma
9365 (Ent, Sloc (N), ".persistent.bss");
9366 Insert_After (N, Prag);
9369 -- Case of use as configuration pragma with no arguments
9372 Check_Valid_Configuration_Pragma;
9373 Persistent_BSS_Mode := True;
9381 -- pragma Postcondition ([Check =>] Boolean_Expression
9382 -- [,[Message =>] String_Expression]);
9384 when Pragma_Postcondition => Postcondition : declare
9386 pragma Warnings (Off, In_Body);
9390 Check_At_Least_N_Arguments (1);
9391 Check_At_Most_N_Arguments (2);
9392 Check_Optional_Identifier (Arg1, Name_Check);
9394 -- All we need to do here is call the common check procedure,
9395 -- the remainder of the processing is found in Sem_Ch6/Sem_Ch7.
9397 Check_Precondition_Postcondition (In_Body);
9404 -- pragma Precondition ([Check =>] Boolean_Expression
9405 -- [,[Message =>] String_Expression]);
9407 when Pragma_Precondition => Precondition : declare
9412 Check_At_Least_N_Arguments (1);
9413 Check_At_Most_N_Arguments (2);
9414 Check_Optional_Identifier (Arg1, Name_Check);
9416 Check_Precondition_Postcondition (In_Body);
9418 -- If in spec, nothing to do. If in body, then we convert the
9419 -- pragma to pragma Check (Precondition, cond [, msg]). Note we
9420 -- do this whether or not precondition checks are enabled. That
9421 -- works fine since pragma Check will do this check.
9424 if Arg_Count = 2 then
9425 Check_Optional_Identifier (Arg3, Name_Message);
9426 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
9429 Analyze_And_Resolve (Get_Pragma_Arg (Arg1), Standard_Boolean);
9433 Chars => Name_Check,
9434 Pragma_Argument_Associations => New_List (
9435 Make_Pragma_Argument_Association (Loc,
9437 Make_Identifier (Loc,
9438 Chars => Name_Precondition)),
9440 Make_Pragma_Argument_Association (Sloc (Arg1),
9441 Expression => Relocate_Node (Get_Pragma_Arg (Arg1))))));
9443 if Arg_Count = 2 then
9444 Append_To (Pragma_Argument_Associations (N),
9445 Make_Pragma_Argument_Association (Sloc (Arg2),
9446 Expression => Relocate_Node (Get_Pragma_Arg (Arg2))));
9457 -- pragma Preelaborate [(library_unit_NAME)];
9459 -- Set the flag Is_Preelaborated of program unit name entity
9461 when Pragma_Preelaborate => Preelaborate : declare
9462 Pa : constant Node_Id := Parent (N);
9463 Pk : constant Node_Kind := Nkind (Pa);
9467 Check_Ada_83_Warning;
9468 Check_Valid_Library_Unit_Pragma;
9470 if Nkind (N) = N_Null_Statement then
9474 Ent := Find_Lib_Unit_Name;
9476 -- This filters out pragmas inside generic parent then
9477 -- show up inside instantiation
9480 and then not (Pk = N_Package_Specification
9481 and then Present (Generic_Parent (Pa)))
9483 if not Debug_Flag_U then
9484 Set_Is_Preelaborated (Ent);
9485 Set_Suppress_Elaboration_Warnings (Ent);
9490 ---------------------
9491 -- Preelaborate_05 --
9492 ---------------------
9494 -- pragma Preelaborate_05 [(library_unit_NAME)];
9496 -- This pragma is useable only in GNAT_Mode, where it is used like
9497 -- pragma Preelaborate but it is only effective in Ada 2005 mode
9498 -- (otherwise it is ignored). This is used to implement AI-362 which
9499 -- recategorizes some run-time packages in Ada 2005 mode.
9501 when Pragma_Preelaborate_05 => Preelaborate_05 : declare
9506 Check_Valid_Library_Unit_Pragma;
9508 if not GNAT_Mode then
9509 Error_Pragma ("pragma% only available in GNAT mode");
9512 if Nkind (N) = N_Null_Statement then
9516 -- This is one of the few cases where we need to test the value of
9517 -- Ada_Version_Explicit rather than Ada_Version (which is always
9518 -- set to Ada_05 in a predefined unit), we need to know the
9519 -- explicit version set to know if this pragma is active.
9521 if Ada_Version_Explicit >= Ada_05 then
9522 Ent := Find_Lib_Unit_Name;
9523 Set_Is_Preelaborated (Ent);
9524 Set_Suppress_Elaboration_Warnings (Ent);
9526 end Preelaborate_05;
9532 -- pragma Priority (EXPRESSION);
9534 when Pragma_Priority => Priority : declare
9535 P : constant Node_Id := Parent (N);
9539 Check_No_Identifiers;
9540 Check_Arg_Count (1);
9544 if Nkind (P) = N_Subprogram_Body then
9545 Check_In_Main_Program;
9547 Arg := Expression (Arg1);
9548 Analyze_And_Resolve (Arg, Standard_Integer);
9552 if not Is_Static_Expression (Arg) then
9553 Flag_Non_Static_Expr
9554 ("main subprogram priority is not static!", Arg);
9557 -- If constraint error, then we already signalled an error
9559 elsif Raises_Constraint_Error (Arg) then
9562 -- Otherwise check in range
9566 Val : constant Uint := Expr_Value (Arg);
9570 or else Val > Expr_Value (Expression
9571 (Parent (RTE (RE_Max_Priority))))
9574 ("main subprogram priority is out of range", Arg1);
9580 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
9582 -- Load an arbitrary entity from System.Tasking to make sure
9583 -- this package is implicitly with'ed, since we need to have
9584 -- the tasking run-time active for the pragma Priority to have
9588 Discard : Entity_Id;
9589 pragma Warnings (Off, Discard);
9591 Discard := RTE (RE_Task_List);
9594 -- Task or Protected, must be of type Integer
9596 elsif Nkind (P) = N_Protected_Definition
9598 Nkind (P) = N_Task_Definition
9600 Arg := Expression (Arg1);
9602 -- The expression must be analyzed in the special manner
9603 -- described in "Handling of Default and Per-Object
9604 -- Expressions" in sem.ads.
9606 Preanalyze_Spec_Expression (Arg, Standard_Integer);
9608 if not Is_Static_Expression (Arg) then
9609 Check_Restriction (Static_Priorities, Arg);
9612 -- Anything else is incorrect
9618 if Has_Priority_Pragma (P) then
9619 Error_Pragma ("duplicate pragma% not allowed");
9621 Set_Has_Priority_Pragma (P, True);
9623 if Nkind (P) = N_Protected_Definition
9625 Nkind (P) = N_Task_Definition
9627 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9628 -- exp_ch9 should use this ???
9633 -----------------------------------
9634 -- Priority_Specific_Dispatching --
9635 -----------------------------------
9637 -- pragma Priority_Specific_Dispatching (
9638 -- policy_IDENTIFIER,
9639 -- first_priority_EXPRESSION,
9640 -- last_priority_EXPRESSION);
9642 when Pragma_Priority_Specific_Dispatching =>
9643 Priority_Specific_Dispatching : declare
9644 Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
9645 -- This is the entity System.Any_Priority;
9648 Lower_Bound : Node_Id;
9649 Upper_Bound : Node_Id;
9655 Check_Arg_Count (3);
9656 Check_No_Identifiers;
9657 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9658 Check_Valid_Configuration_Pragma;
9659 Get_Name_String (Chars (Expression (Arg1)));
9660 DP := Fold_Upper (Name_Buffer (1));
9662 Lower_Bound := Expression (Arg2);
9663 Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
9664 Lower_Val := Expr_Value (Lower_Bound);
9666 Upper_Bound := Expression (Arg3);
9667 Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
9668 Upper_Val := Expr_Value (Upper_Bound);
9670 -- It is not allowed to use Task_Dispatching_Policy and
9671 -- Priority_Specific_Dispatching in the same partition.
9673 if Task_Dispatching_Policy /= ' ' then
9674 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9676 ("pragma% incompatible with Task_Dispatching_Policy#");
9678 -- Check lower bound in range
9680 elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9682 Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
9685 ("first_priority is out of range", Arg2);
9687 -- Check upper bound in range
9689 elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9691 Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
9694 ("last_priority is out of range", Arg3);
9696 -- Check that the priority range is valid
9698 elsif Lower_Val > Upper_Val then
9700 ("last_priority_expression must be greater than" &
9701 " or equal to first_priority_expression");
9703 -- Store the new policy, but always preserve System_Location since
9704 -- we like the error message with the run-time name.
9707 -- Check overlapping in the priority ranges specified in other
9708 -- Priority_Specific_Dispatching pragmas within the same
9709 -- partition. We can only check those we know about!
9712 Specific_Dispatching.First .. Specific_Dispatching.Last
9714 if Specific_Dispatching.Table (J).First_Priority in
9715 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9716 or else Specific_Dispatching.Table (J).Last_Priority in
9717 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9720 Specific_Dispatching.Table (J).Pragma_Loc;
9722 ("priority range overlaps with "
9723 & "Priority_Specific_Dispatching#");
9727 -- The use of Priority_Specific_Dispatching is incompatible
9728 -- with Task_Dispatching_Policy.
9730 if Task_Dispatching_Policy /= ' ' then
9731 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9733 ("Priority_Specific_Dispatching incompatible "
9734 & "with Task_Dispatching_Policy#");
9737 -- The use of Priority_Specific_Dispatching forces ceiling
9740 if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
9741 Error_Msg_Sloc := Locking_Policy_Sloc;
9743 ("Priority_Specific_Dispatching incompatible "
9744 & "with Locking_Policy#");
9746 -- Set the Ceiling_Locking policy, but preserve System_Location
9747 -- since we like the error message with the run time name.
9750 Locking_Policy := 'C';
9752 if Locking_Policy_Sloc /= System_Location then
9753 Locking_Policy_Sloc := Loc;
9757 -- Add entry in the table
9759 Specific_Dispatching.Append
9760 ((Dispatching_Policy => DP,
9761 First_Priority => UI_To_Int (Lower_Val),
9762 Last_Priority => UI_To_Int (Upper_Val),
9763 Pragma_Loc => Loc));
9765 end Priority_Specific_Dispatching;
9771 -- pragma Profile (profile_IDENTIFIER);
9773 -- profile_IDENTIFIER => Restricted | Ravenscar
9775 when Pragma_Profile =>
9777 Check_Arg_Count (1);
9778 Check_Valid_Configuration_Pragma;
9779 Check_No_Identifiers;
9782 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9784 if Chars (Argx) = Name_Ravenscar then
9785 Set_Ravenscar_Profile (N);
9786 elsif Chars (Argx) = Name_Restricted then
9787 Set_Profile_Restrictions (Restricted, N, Warn => False);
9789 Error_Pragma_Arg ("& is not a valid profile", Argx);
9793 ----------------------
9794 -- Profile_Warnings --
9795 ----------------------
9797 -- pragma Profile_Warnings (profile_IDENTIFIER);
9799 -- profile_IDENTIFIER => Restricted | Ravenscar
9801 when Pragma_Profile_Warnings =>
9803 Check_Arg_Count (1);
9804 Check_Valid_Configuration_Pragma;
9805 Check_No_Identifiers;
9808 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9810 if Chars (Argx) = Name_Ravenscar then
9811 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
9812 elsif Chars (Argx) = Name_Restricted then
9813 Set_Profile_Restrictions (Restricted, N, Warn => True);
9815 Error_Pragma_Arg ("& is not a valid profile", Argx);
9819 --------------------------
9820 -- Propagate_Exceptions --
9821 --------------------------
9823 -- pragma Propagate_Exceptions;
9825 -- Note: this pragma is obsolete and has no effect
9827 when Pragma_Propagate_Exceptions =>
9829 Check_Arg_Count (0);
9831 if In_Extended_Main_Source_Unit (N) then
9832 Propagate_Exceptions := True;
9839 -- pragma Psect_Object (
9840 -- [Internal =>] LOCAL_NAME,
9841 -- [, [External =>] EXTERNAL_SYMBOL]
9842 -- [, [Size =>] EXTERNAL_SYMBOL]);
9844 when Pragma_Psect_Object | Pragma_Common_Object =>
9845 Psect_Object : declare
9846 Args : Args_List (1 .. 3);
9847 Names : constant Name_List (1 .. 3) := (
9852 Internal : Node_Id renames Args (1);
9853 External : Node_Id renames Args (2);
9854 Size : Node_Id renames Args (3);
9858 procedure Check_Too_Long (Arg : Node_Id);
9859 -- Posts message if the argument is an identifier with more
9860 -- than 31 characters, or a string literal with more than
9861 -- 31 characters, and we are operating under VMS
9863 --------------------
9864 -- Check_Too_Long --
9865 --------------------
9867 procedure Check_Too_Long (Arg : Node_Id) is
9868 X : constant Node_Id := Original_Node (Arg);
9871 if Nkind (X) /= N_String_Literal
9873 Nkind (X) /= N_Identifier
9876 ("inappropriate argument for pragma %", Arg);
9879 if OpenVMS_On_Target then
9880 if (Nkind (X) = N_String_Literal
9881 and then String_Length (Strval (X)) > 31)
9883 (Nkind (X) = N_Identifier
9884 and then Length_Of_Name (Chars (X)) > 31)
9887 ("argument for pragma % is longer than 31 characters",
9893 -- Start of processing for Common_Object/Psect_Object
9897 Gather_Associations (Names, Args);
9898 Process_Extended_Import_Export_Internal_Arg (Internal);
9900 Def_Id := Entity (Internal);
9902 if Ekind (Def_Id) /= E_Constant
9903 and then Ekind (Def_Id) /= E_Variable
9906 ("pragma% must designate an object", Internal);
9909 Check_Too_Long (Internal);
9911 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
9913 ("cannot use pragma% for imported/exported object",
9917 if Is_Concurrent_Type (Etype (Internal)) then
9919 ("cannot specify pragma % for task/protected object",
9923 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
9925 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
9927 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
9930 if Ekind (Def_Id) = E_Constant then
9932 ("cannot specify pragma % for a constant", Internal);
9935 if Is_Record_Type (Etype (Internal)) then
9941 Ent := First_Entity (Etype (Internal));
9942 while Present (Ent) loop
9943 Decl := Declaration_Node (Ent);
9945 if Ekind (Ent) = E_Component
9946 and then Nkind (Decl) = N_Component_Declaration
9947 and then Present (Expression (Decl))
9948 and then Warn_On_Export_Import
9951 ("?object for pragma % has defaults", Internal);
9961 if Present (Size) then
9962 Check_Too_Long (Size);
9965 if Present (External) then
9966 Check_Arg_Is_External_Name (External);
9967 Check_Too_Long (External);
9970 -- If all error tests pass, link pragma on to the rep item chain
9972 Record_Rep_Item (Def_Id, N);
9979 -- pragma Pure [(library_unit_NAME)];
9981 when Pragma_Pure => Pure : declare
9985 Check_Ada_83_Warning;
9986 Check_Valid_Library_Unit_Pragma;
9988 if Nkind (N) = N_Null_Statement then
9992 Ent := Find_Lib_Unit_Name;
9994 Set_Has_Pragma_Pure (Ent);
9995 Set_Suppress_Elaboration_Warnings (Ent);
10002 -- pragma Pure_05 [(library_unit_NAME)];
10004 -- This pragma is useable only in GNAT_Mode, where it is used like
10005 -- pragma Pure but it is only effective in Ada 2005 mode (otherwise
10006 -- it is ignored). It may be used after a pragma Preelaborate, in
10007 -- which case it overrides the effect of the pragma Preelaborate.
10008 -- This is used to implement AI-362 which recategorizes some run-time
10009 -- packages in Ada 2005 mode.
10011 when Pragma_Pure_05 => Pure_05 : declare
10016 Check_Valid_Library_Unit_Pragma;
10018 if not GNAT_Mode then
10019 Error_Pragma ("pragma% only available in GNAT mode");
10021 if Nkind (N) = N_Null_Statement then
10025 -- This is one of the few cases where we need to test the value of
10026 -- Ada_Version_Explicit rather than Ada_Version (which is always
10027 -- set to Ada_05 in a predefined unit), we need to know the
10028 -- explicit version set to know if this pragma is active.
10030 if Ada_Version_Explicit >= Ada_05 then
10031 Ent := Find_Lib_Unit_Name;
10032 Set_Is_Preelaborated (Ent, False);
10034 Set_Suppress_Elaboration_Warnings (Ent);
10038 -------------------
10039 -- Pure_Function --
10040 -------------------
10042 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
10044 when Pragma_Pure_Function => Pure_Function : declare
10047 Def_Id : Entity_Id;
10048 Effective : Boolean := False;
10052 Check_Arg_Count (1);
10053 Check_Optional_Identifier (Arg1, Name_Entity);
10054 Check_Arg_Is_Local_Name (Arg1);
10055 E_Id := Expression (Arg1);
10057 if Error_Posted (E_Id) then
10061 -- Loop through homonyms (overloadings) of referenced entity
10063 E := Entity (E_Id);
10065 if Present (E) then
10067 Def_Id := Get_Base_Subprogram (E);
10069 if Ekind (Def_Id) /= E_Function
10070 and then Ekind (Def_Id) /= E_Generic_Function
10071 and then Ekind (Def_Id) /= E_Operator
10074 ("pragma% requires a function name", Arg1);
10077 Set_Is_Pure (Def_Id);
10079 if not Has_Pragma_Pure_Function (Def_Id) then
10080 Set_Has_Pragma_Pure_Function (Def_Id);
10085 exit when No (E) or else Scope (E) /= Current_Scope;
10089 and then Warn_On_Redundant_Constructs
10091 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
10097 --------------------
10098 -- Queuing_Policy --
10099 --------------------
10101 -- pragma Queuing_Policy (policy_IDENTIFIER);
10103 when Pragma_Queuing_Policy => declare
10107 Check_Ada_83_Warning;
10108 Check_Arg_Count (1);
10109 Check_No_Identifiers;
10110 Check_Arg_Is_Queuing_Policy (Arg1);
10111 Check_Valid_Configuration_Pragma;
10112 Get_Name_String (Chars (Expression (Arg1)));
10113 QP := Fold_Upper (Name_Buffer (1));
10115 if Queuing_Policy /= ' '
10116 and then Queuing_Policy /= QP
10118 Error_Msg_Sloc := Queuing_Policy_Sloc;
10119 Error_Pragma ("queuing policy incompatible with policy#");
10121 -- Set new policy, but always preserve System_Location since
10122 -- we like the error message with the run time name.
10125 Queuing_Policy := QP;
10127 if Queuing_Policy_Sloc /= System_Location then
10128 Queuing_Policy_Sloc := Loc;
10133 -----------------------
10134 -- Relative_Deadline --
10135 -----------------------
10137 -- pragma Relative_Deadline (time_span_EXPRESSION);
10139 when Pragma_Relative_Deadline => Relative_Deadline : declare
10140 P : constant Node_Id := Parent (N);
10145 Check_No_Identifiers;
10146 Check_Arg_Count (1);
10148 Arg := Expression (Arg1);
10150 -- The expression must be analyzed in the special manner described
10151 -- in "Handling of Default and Per-Object Expressions" in sem.ads.
10153 Preanalyze_Spec_Expression (Arg, RTE (RE_Time_Span));
10157 if Nkind (P) = N_Subprogram_Body then
10158 Check_In_Main_Program;
10162 elsif Nkind (P) = N_Task_Definition then
10165 -- Anything else is incorrect
10171 if Has_Relative_Deadline_Pragma (P) then
10172 Error_Pragma ("duplicate pragma% not allowed");
10174 Set_Has_Relative_Deadline_Pragma (P, True);
10176 if Nkind (P) = N_Task_Definition then
10177 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10180 end Relative_Deadline;
10182 ---------------------------
10183 -- Remote_Call_Interface --
10184 ---------------------------
10186 -- pragma Remote_Call_Interface [(library_unit_NAME)];
10188 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
10189 Cunit_Node : Node_Id;
10190 Cunit_Ent : Entity_Id;
10194 Check_Ada_83_Warning;
10195 Check_Valid_Library_Unit_Pragma;
10197 if Nkind (N) = N_Null_Statement then
10201 Cunit_Node := Cunit (Current_Sem_Unit);
10202 K := Nkind (Unit (Cunit_Node));
10203 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10205 if K = N_Package_Declaration
10206 or else K = N_Generic_Package_Declaration
10207 or else K = N_Subprogram_Declaration
10208 or else K = N_Generic_Subprogram_Declaration
10209 or else (K = N_Subprogram_Body
10210 and then Acts_As_Spec (Unit (Cunit_Node)))
10215 "pragma% must apply to package or subprogram declaration");
10218 Set_Is_Remote_Call_Interface (Cunit_Ent);
10219 end Remote_Call_Interface;
10225 -- pragma Remote_Types [(library_unit_NAME)];
10227 when Pragma_Remote_Types => Remote_Types : declare
10228 Cunit_Node : Node_Id;
10229 Cunit_Ent : Entity_Id;
10232 Check_Ada_83_Warning;
10233 Check_Valid_Library_Unit_Pragma;
10235 if Nkind (N) = N_Null_Statement then
10239 Cunit_Node := Cunit (Current_Sem_Unit);
10240 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10242 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
10244 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
10247 "pragma% can only apply to a package declaration");
10250 Set_Is_Remote_Types (Cunit_Ent);
10257 -- pragma Ravenscar;
10259 when Pragma_Ravenscar =>
10261 Check_Arg_Count (0);
10262 Check_Valid_Configuration_Pragma;
10263 Set_Ravenscar_Profile (N);
10265 if Warn_On_Obsolescent_Feature then
10267 ("pragma Ravenscar is an obsolescent feature?", N);
10269 ("|use pragma Profile (Ravenscar) instead", N);
10272 -------------------------
10273 -- Restricted_Run_Time --
10274 -------------------------
10276 -- pragma Restricted_Run_Time;
10278 when Pragma_Restricted_Run_Time =>
10280 Check_Arg_Count (0);
10281 Check_Valid_Configuration_Pragma;
10282 Set_Profile_Restrictions (Restricted, N, Warn => False);
10284 if Warn_On_Obsolescent_Feature then
10286 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
10288 ("|use pragma Profile (Restricted) instead", N);
10295 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
10298 -- restriction_IDENTIFIER
10299 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10301 when Pragma_Restrictions =>
10302 Process_Restrictions_Or_Restriction_Warnings (Warn => False);
10304 --------------------------
10305 -- Restriction_Warnings --
10306 --------------------------
10308 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
10311 -- restriction_IDENTIFIER
10312 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10314 when Pragma_Restriction_Warnings =>
10316 Process_Restrictions_Or_Restriction_Warnings (Warn => True);
10322 -- pragma Reviewable;
10324 when Pragma_Reviewable =>
10325 Check_Ada_83_Warning;
10326 Check_Arg_Count (0);
10329 -------------------
10330 -- Share_Generic --
10331 -------------------
10333 -- pragma Share_Generic (NAME {, NAME});
10335 when Pragma_Share_Generic =>
10337 Process_Generic_List;
10343 -- pragma Shared (LOCAL_NAME);
10345 when Pragma_Shared =>
10347 Process_Atomic_Shared_Volatile;
10349 --------------------
10350 -- Shared_Passive --
10351 --------------------
10353 -- pragma Shared_Passive [(library_unit_NAME)];
10355 -- Set the flag Is_Shared_Passive of program unit name entity
10357 when Pragma_Shared_Passive => Shared_Passive : declare
10358 Cunit_Node : Node_Id;
10359 Cunit_Ent : Entity_Id;
10362 Check_Ada_83_Warning;
10363 Check_Valid_Library_Unit_Pragma;
10365 if Nkind (N) = N_Null_Statement then
10369 Cunit_Node := Cunit (Current_Sem_Unit);
10370 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10372 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
10374 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
10377 "pragma% can only apply to a package declaration");
10380 Set_Is_Shared_Passive (Cunit_Ent);
10381 end Shared_Passive;
10383 ----------------------
10384 -- Source_File_Name --
10385 ----------------------
10387 -- There are five forms for this pragma:
10389 -- pragma Source_File_Name (
10390 -- [UNIT_NAME =>] unit_NAME,
10391 -- BODY_FILE_NAME => STRING_LITERAL
10392 -- [, [INDEX =>] INTEGER_LITERAL]);
10394 -- pragma Source_File_Name (
10395 -- [UNIT_NAME =>] unit_NAME,
10396 -- SPEC_FILE_NAME => STRING_LITERAL
10397 -- [, [INDEX =>] INTEGER_LITERAL]);
10399 -- pragma Source_File_Name (
10400 -- BODY_FILE_NAME => STRING_LITERAL
10401 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10402 -- [, CASING => CASING_SPEC]);
10404 -- pragma Source_File_Name (
10405 -- SPEC_FILE_NAME => STRING_LITERAL
10406 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10407 -- [, CASING => CASING_SPEC]);
10409 -- pragma Source_File_Name (
10410 -- SUBUNIT_FILE_NAME => STRING_LITERAL
10411 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10412 -- [, CASING => CASING_SPEC]);
10414 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
10416 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
10417 -- Source_File_Name (SFN), however their usage is exclusive:
10418 -- SFN can only be used when no project file is used, while
10419 -- SFNP can only be used when a project file is used.
10421 -- No processing here. Processing was completed during parsing,
10422 -- since we need to have file names set as early as possible.
10423 -- Units are loaded well before semantic processing starts.
10425 -- The only processing we defer to this point is the check
10426 -- for correct placement.
10428 when Pragma_Source_File_Name =>
10430 Check_Valid_Configuration_Pragma;
10432 ------------------------------
10433 -- Source_File_Name_Project --
10434 ------------------------------
10436 -- See Source_File_Name for syntax
10438 -- No processing here. Processing was completed during parsing,
10439 -- since we need to have file names set as early as possible.
10440 -- Units are loaded well before semantic processing starts.
10442 -- The only processing we defer to this point is the check
10443 -- for correct placement.
10445 when Pragma_Source_File_Name_Project =>
10447 Check_Valid_Configuration_Pragma;
10449 -- Check that a pragma Source_File_Name_Project is used only
10450 -- in a configuration pragmas file.
10452 -- Pragmas Source_File_Name_Project should only be generated
10453 -- by the Project Manager in configuration pragmas files.
10455 -- This is really an ugly test. It seems to depend on some
10456 -- accidental and undocumented property. At the very least
10457 -- it needs to be documented, but it would be better to have
10458 -- a clean way of testing if we are in a configuration file???
10460 if Present (Parent (N)) then
10462 ("pragma% can only appear in a configuration pragmas file");
10465 ----------------------
10466 -- Source_Reference --
10467 ----------------------
10469 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
10471 -- Nothing to do, all processing completed in Par.Prag, since we
10472 -- need the information for possible parser messages that are output
10474 when Pragma_Source_Reference =>
10477 --------------------------------
10478 -- Static_Elaboration_Desired --
10479 --------------------------------
10481 -- pragma Static_Elaboration_Desired (DIRECT_NAME);
10483 when Pragma_Static_Elaboration_Desired =>
10485 Check_At_Most_N_Arguments (1);
10487 if Is_Compilation_Unit (Current_Scope)
10488 and then Ekind (Current_Scope) = E_Package
10490 Set_Static_Elaboration_Desired (Current_Scope, True);
10492 Error_Pragma ("pragma% must apply to a library-level package");
10499 -- pragma Storage_Size (EXPRESSION);
10501 when Pragma_Storage_Size => Storage_Size : declare
10502 P : constant Node_Id := Parent (N);
10506 Check_No_Identifiers;
10507 Check_Arg_Count (1);
10509 -- The expression must be analyzed in the special manner described
10510 -- in "Handling of Default Expressions" in sem.ads.
10512 Arg := Expression (Arg1);
10513 Preanalyze_Spec_Expression (Arg, Any_Integer);
10515 if not Is_Static_Expression (Arg) then
10516 Check_Restriction (Static_Storage_Size, Arg);
10519 if Nkind (P) /= N_Task_Definition then
10524 if Has_Storage_Size_Pragma (P) then
10525 Error_Pragma ("duplicate pragma% not allowed");
10527 Set_Has_Storage_Size_Pragma (P, True);
10530 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10531 -- ??? exp_ch9 should use this!
10539 -- pragma Storage_Unit (NUMERIC_LITERAL);
10541 -- Only permitted argument is System'Storage_Unit value
10543 when Pragma_Storage_Unit =>
10544 Check_No_Identifiers;
10545 Check_Arg_Count (1);
10546 Check_Arg_Is_Integer_Literal (Arg1);
10548 if Intval (Expression (Arg1)) /=
10549 UI_From_Int (Ttypes.System_Storage_Unit)
10551 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
10553 ("the only allowed argument for pragma% is ^", Arg1);
10556 --------------------
10557 -- Stream_Convert --
10558 --------------------
10560 -- pragma Stream_Convert (
10561 -- [Entity =>] type_LOCAL_NAME,
10562 -- [Read =>] function_NAME,
10563 -- [Write =>] function NAME);
10565 when Pragma_Stream_Convert => Stream_Convert : declare
10567 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
10568 -- Check that the given argument is the name of a local
10569 -- function of one argument that is not overloaded earlier
10570 -- in the current local scope. A check is also made that the
10571 -- argument is a function with one parameter.
10573 --------------------------------------
10574 -- Check_OK_Stream_Convert_Function --
10575 --------------------------------------
10577 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
10581 Check_Arg_Is_Local_Name (Arg);
10582 Ent := Entity (Expression (Arg));
10584 if Has_Homonym (Ent) then
10586 ("argument for pragma% may not be overloaded", Arg);
10589 if Ekind (Ent) /= E_Function
10590 or else No (First_Formal (Ent))
10591 or else Present (Next_Formal (First_Formal (Ent)))
10594 ("argument for pragma% must be" &
10595 " function of one argument", Arg);
10597 end Check_OK_Stream_Convert_Function;
10599 -- Start of processing for Stream_Convert
10603 Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
10604 Check_Arg_Count (3);
10605 Check_Optional_Identifier (Arg1, Name_Entity);
10606 Check_Optional_Identifier (Arg2, Name_Read);
10607 Check_Optional_Identifier (Arg3, Name_Write);
10608 Check_Arg_Is_Local_Name (Arg1);
10609 Check_OK_Stream_Convert_Function (Arg2);
10610 Check_OK_Stream_Convert_Function (Arg3);
10613 Typ : constant Entity_Id :=
10614 Underlying_Type (Entity (Expression (Arg1)));
10615 Read : constant Entity_Id := Entity (Expression (Arg2));
10616 Write : constant Entity_Id := Entity (Expression (Arg3));
10619 Check_First_Subtype (Arg1);
10621 -- Check for too early or too late. Note that we don't enforce
10622 -- the rule about primitive operations in this case, since, as
10623 -- is the case for explicit stream attributes themselves, these
10624 -- restrictions are not appropriate. Note that the chaining of
10625 -- the pragma by Rep_Item_Too_Late is actually the critical
10626 -- processing done for this pragma.
10628 if Rep_Item_Too_Early (Typ, N)
10630 Rep_Item_Too_Late (Typ, N, FOnly => True)
10635 -- Return if previous error
10637 if Etype (Typ) = Any_Type
10639 Etype (Read) = Any_Type
10641 Etype (Write) = Any_Type
10648 if Underlying_Type (Etype (Read)) /= Typ then
10650 ("incorrect return type for function&", Arg2);
10653 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
10655 ("incorrect parameter type for function&", Arg3);
10658 if Underlying_Type (Etype (First_Formal (Read))) /=
10659 Underlying_Type (Etype (Write))
10662 ("result type of & does not match Read parameter type",
10666 end Stream_Convert;
10668 -------------------------
10669 -- Style_Checks (GNAT) --
10670 -------------------------
10672 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
10674 -- This is processed by the parser since some of the style
10675 -- checks take place during source scanning and parsing. This
10676 -- means that we don't need to issue error messages here.
10678 when Pragma_Style_Checks => Style_Checks : declare
10679 A : constant Node_Id := Expression (Arg1);
10685 Check_No_Identifiers;
10687 -- Two argument form
10689 if Arg_Count = 2 then
10690 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
10697 E_Id := Expression (Arg2);
10700 if not Is_Entity_Name (E_Id) then
10702 ("second argument of pragma% must be entity name",
10706 E := Entity (E_Id);
10712 Set_Suppress_Style_Checks (E,
10713 (Chars (Expression (Arg1)) = Name_Off));
10714 exit when No (Homonym (E));
10720 -- One argument form
10723 Check_Arg_Count (1);
10725 if Nkind (A) = N_String_Literal then
10729 Slen : constant Natural := Natural (String_Length (S));
10730 Options : String (1 .. Slen);
10736 C := Get_String_Char (S, Int (J));
10737 exit when not In_Character_Range (C);
10738 Options (J) := Get_Character (C);
10740 -- If at end of string, set options. As per discussion
10741 -- above, no need to check for errors, since we issued
10742 -- them in the parser.
10745 Set_Style_Check_Options (Options);
10753 elsif Nkind (A) = N_Identifier then
10754 if Chars (A) = Name_All_Checks then
10755 Set_Default_Style_Check_Options;
10757 elsif Chars (A) = Name_On then
10758 Style_Check := True;
10760 elsif Chars (A) = Name_Off then
10761 Style_Check := False;
10771 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
10773 when Pragma_Subtitle =>
10775 Check_Arg_Count (1);
10776 Check_Optional_Identifier (Arg1, Name_Subtitle);
10777 Check_Arg_Is_String_Literal (Arg1);
10783 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
10785 when Pragma_Suppress =>
10786 Process_Suppress_Unsuppress (True);
10792 -- pragma Suppress_All;
10794 -- The only check made here is that the pragma appears in the
10795 -- proper place, i.e. following a compilation unit. If indeed
10796 -- it appears in this context, then the parser has already
10797 -- inserted an equivalent pragma Suppress (All_Checks) to get
10798 -- the required effect.
10800 when Pragma_Suppress_All =>
10802 Check_Arg_Count (0);
10804 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
10805 or else not Is_List_Member (N)
10806 or else List_Containing (N) /= Pragmas_After (Parent (N))
10809 ("misplaced pragma%, must follow compilation unit");
10812 -------------------------
10813 -- Suppress_Debug_Info --
10814 -------------------------
10816 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
10818 when Pragma_Suppress_Debug_Info =>
10820 Check_Arg_Count (1);
10821 Check_Optional_Identifier (Arg1, Name_Entity);
10822 Check_Arg_Is_Local_Name (Arg1);
10823 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
10825 ----------------------------------
10826 -- Suppress_Exception_Locations --
10827 ----------------------------------
10829 -- pragma Suppress_Exception_Locations;
10831 when Pragma_Suppress_Exception_Locations =>
10833 Check_Arg_Count (0);
10834 Check_Valid_Configuration_Pragma;
10835 Exception_Locations_Suppressed := True;
10837 -----------------------------
10838 -- Suppress_Initialization --
10839 -----------------------------
10841 -- pragma Suppress_Initialization ([Entity =>] type_Name);
10843 when Pragma_Suppress_Initialization => Suppress_Init : declare
10849 Check_Arg_Count (1);
10850 Check_Optional_Identifier (Arg1, Name_Entity);
10851 Check_Arg_Is_Local_Name (Arg1);
10853 E_Id := Expression (Arg1);
10855 if Etype (E_Id) = Any_Type then
10859 E := Entity (E_Id);
10861 if Is_Type (E) then
10862 if Is_Incomplete_Or_Private_Type (E) then
10863 if No (Full_View (Base_Type (E))) then
10865 ("argument of pragma% cannot be an incomplete type",
10868 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
10871 Set_Suppress_Init_Proc (Base_Type (E));
10876 ("pragma% requires argument that is a type name", Arg1);
10884 -- pragma System_Name (DIRECT_NAME);
10886 -- Syntax check: one argument, which must be the identifier GNAT
10887 -- or the identifier GCC, no other identifiers are acceptable.
10889 when Pragma_System_Name =>
10890 Check_No_Identifiers;
10891 Check_Arg_Count (1);
10892 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
10894 -----------------------------
10895 -- Task_Dispatching_Policy --
10896 -----------------------------
10898 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
10900 when Pragma_Task_Dispatching_Policy => declare
10904 Check_Ada_83_Warning;
10905 Check_Arg_Count (1);
10906 Check_No_Identifiers;
10907 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
10908 Check_Valid_Configuration_Pragma;
10909 Get_Name_String (Chars (Expression (Arg1)));
10910 DP := Fold_Upper (Name_Buffer (1));
10912 if Task_Dispatching_Policy /= ' '
10913 and then Task_Dispatching_Policy /= DP
10915 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
10917 ("task dispatching policy incompatible with policy#");
10919 -- Set new policy, but always preserve System_Location since
10920 -- we like the error message with the run time name.
10923 Task_Dispatching_Policy := DP;
10925 if Task_Dispatching_Policy_Sloc /= System_Location then
10926 Task_Dispatching_Policy_Sloc := Loc;
10935 -- pragma Task_Info (EXPRESSION);
10937 when Pragma_Task_Info => Task_Info : declare
10938 P : constant Node_Id := Parent (N);
10943 if Nkind (P) /= N_Task_Definition then
10944 Error_Pragma ("pragma% must appear in task definition");
10947 Check_No_Identifiers;
10948 Check_Arg_Count (1);
10950 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
10952 if Etype (Expression (Arg1)) = Any_Type then
10956 if Has_Task_Info_Pragma (P) then
10957 Error_Pragma ("duplicate pragma% not allowed");
10959 Set_Has_Task_Info_Pragma (P, True);
10967 -- pragma Task_Name (string_EXPRESSION);
10969 when Pragma_Task_Name => Task_Name : declare
10970 P : constant Node_Id := Parent (N);
10974 Check_No_Identifiers;
10975 Check_Arg_Count (1);
10977 Arg := Expression (Arg1);
10978 Analyze_And_Resolve (Arg, Standard_String);
10980 if Nkind (P) /= N_Task_Definition then
10984 if Has_Task_Name_Pragma (P) then
10985 Error_Pragma ("duplicate pragma% not allowed");
10987 Set_Has_Task_Name_Pragma (P, True);
10988 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10996 -- pragma Task_Storage (
10997 -- [Task_Type =>] LOCAL_NAME,
10998 -- [Top_Guard =>] static_integer_EXPRESSION);
11000 when Pragma_Task_Storage => Task_Storage : declare
11001 Args : Args_List (1 .. 2);
11002 Names : constant Name_List (1 .. 2) := (
11006 Task_Type : Node_Id renames Args (1);
11007 Top_Guard : Node_Id renames Args (2);
11013 Gather_Associations (Names, Args);
11015 if No (Task_Type) then
11017 ("missing task_type argument for pragma%");
11020 Check_Arg_Is_Local_Name (Task_Type);
11022 Ent := Entity (Task_Type);
11024 if not Is_Task_Type (Ent) then
11026 ("argument for pragma% must be task type", Task_Type);
11029 if No (Top_Guard) then
11031 ("pragma% takes two arguments", Task_Type);
11033 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
11036 Check_First_Subtype (Task_Type);
11038 if Rep_Item_Too_Late (Ent, N) then
11047 -- pragma Time_Slice (static_duration_EXPRESSION);
11049 when Pragma_Time_Slice => Time_Slice : declare
11055 Check_Arg_Count (1);
11056 Check_No_Identifiers;
11057 Check_In_Main_Program;
11058 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
11060 if not Error_Posted (Arg1) then
11062 while Present (Nod) loop
11063 if Nkind (Nod) = N_Pragma
11064 and then Pragma_Name (Nod) = Name_Time_Slice
11066 Error_Msg_Name_1 := Pname;
11067 Error_Msg_N ("duplicate pragma% not permitted", Nod);
11074 -- Process only if in main unit
11076 if Get_Source_Unit (Loc) = Main_Unit then
11077 Opt.Time_Slice_Set := True;
11078 Val := Expr_Value_R (Expression (Arg1));
11080 if Val <= Ureal_0 then
11081 Opt.Time_Slice_Value := 0;
11083 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
11084 Opt.Time_Slice_Value := 1_000_000_000;
11087 Opt.Time_Slice_Value :=
11088 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
11097 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
11099 -- TITLING_OPTION ::=
11100 -- [Title =>] STRING_LITERAL
11101 -- | [Subtitle =>] STRING_LITERAL
11103 when Pragma_Title => Title : declare
11104 Args : Args_List (1 .. 2);
11105 Names : constant Name_List (1 .. 2) := (
11111 Gather_Associations (Names, Args);
11113 for J in 1 .. 2 loop
11114 if Present (Args (J)) then
11115 Check_Arg_Is_String_Literal (Args (J));
11120 ---------------------
11121 -- Unchecked_Union --
11122 ---------------------
11124 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
11126 when Pragma_Unchecked_Union => Unchecked_Union : declare
11127 Assoc : constant Node_Id := Arg1;
11128 Type_Id : constant Node_Id := Expression (Assoc);
11139 Check_No_Identifiers;
11140 Check_Arg_Count (1);
11141 Check_Arg_Is_Local_Name (Arg1);
11143 Find_Type (Type_Id);
11144 Typ := Entity (Type_Id);
11147 or else Rep_Item_Too_Early (Typ, N)
11151 Typ := Underlying_Type (Typ);
11154 if Rep_Item_Too_Late (Typ, N) then
11158 Check_First_Subtype (Arg1);
11160 -- Note remaining cases are references to a type in the current
11161 -- declarative part. If we find an error, we post the error on
11162 -- the relevant type declaration at an appropriate point.
11164 if not Is_Record_Type (Typ) then
11165 Error_Msg_N ("Unchecked_Union must be record type", Typ);
11168 elsif Is_Tagged_Type (Typ) then
11169 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
11172 elsif Is_Limited_Type (Typ) then
11174 ("Unchecked_Union must not be limited record type", Typ);
11175 Explain_Limited_Type (Typ, Typ);
11179 if not Has_Discriminants (Typ) then
11181 ("Unchecked_Union must have one discriminant", Typ);
11185 Discr := First_Discriminant (Typ);
11186 while Present (Discr) loop
11187 if No (Discriminant_Default_Value (Discr)) then
11189 ("Unchecked_Union discriminant must have default value",
11192 Next_Discriminant (Discr);
11195 Tdef := Type_Definition (Declaration_Node (Typ));
11196 Clist := Component_List (Tdef);
11198 Comp := First (Component_Items (Clist));
11199 while Present (Comp) loop
11200 Check_Component (Comp);
11204 if No (Clist) or else No (Variant_Part (Clist)) then
11206 ("Unchecked_Union must have variant part",
11211 Vpart := Variant_Part (Clist);
11213 Variant := First (Variants (Vpart));
11214 while Present (Variant) loop
11215 Check_Variant (Variant);
11220 Set_Is_Unchecked_Union (Typ, True);
11221 Set_Convention (Typ, Convention_C);
11223 Set_Has_Unchecked_Union (Base_Type (Typ), True);
11224 Set_Is_Unchecked_Union (Base_Type (Typ), True);
11225 end Unchecked_Union;
11227 ------------------------
11228 -- Unimplemented_Unit --
11229 ------------------------
11231 -- pragma Unimplemented_Unit;
11233 -- Note: this only gives an error if we are generating code,
11234 -- or if we are in a generic library unit (where the pragma
11235 -- appears in the body, not in the spec).
11237 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
11238 Cunitent : constant Entity_Id :=
11239 Cunit_Entity (Get_Source_Unit (Loc));
11240 Ent_Kind : constant Entity_Kind :=
11245 Check_Arg_Count (0);
11247 if Operating_Mode = Generate_Code
11248 or else Ent_Kind = E_Generic_Function
11249 or else Ent_Kind = E_Generic_Procedure
11250 or else Ent_Kind = E_Generic_Package
11252 Get_Name_String (Chars (Cunitent));
11253 Set_Casing (Mixed_Case);
11254 Write_Str (Name_Buffer (1 .. Name_Len));
11255 Write_Str (" is not supported in this configuration");
11257 raise Unrecoverable_Error;
11259 end Unimplemented_Unit;
11261 ------------------------
11262 -- Universal_Aliasing --
11263 ------------------------
11265 -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)];
11267 when Pragma_Universal_Aliasing => Universal_Alias : declare
11272 Check_Arg_Count (1);
11273 Check_Optional_Identifier (Arg2, Name_Entity);
11274 Check_Arg_Is_Local_Name (Arg1);
11275 E_Id := Entity (Expression (Arg1));
11277 if E_Id = Any_Type then
11279 elsif No (E_Id) or else not Is_Type (E_Id) then
11280 Error_Pragma_Arg ("pragma% requires type", Arg1);
11283 Set_Universal_Aliasing (Implementation_Base_Type (E_Id));
11284 end Universal_Alias;
11286 --------------------
11287 -- Universal_Data --
11288 --------------------
11290 -- pragma Universal_Data [(library_unit_NAME)];
11292 when Pragma_Universal_Data =>
11295 -- If this is a configuration pragma, then set the universal
11296 -- addressing option, otherwise confirm that the pragma
11297 -- satisfies the requirements of library unit pragma placement
11298 -- and leave it to the GNAAMP back end to detect the pragma
11299 -- (avoids transitive setting of the option due to withed units).
11301 if Is_Configuration_Pragma then
11302 Universal_Addressing_On_AAMP := True;
11304 Check_Valid_Library_Unit_Pragma;
11307 if not AAMP_On_Target then
11308 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
11315 -- pragma Unmodified (local_Name {, local_Name});
11317 when Pragma_Unmodified => Unmodified : declare
11318 Arg_Node : Node_Id;
11319 Arg_Expr : Node_Id;
11320 Arg_Ent : Entity_Id;
11324 Check_At_Least_N_Arguments (1);
11326 -- Loop through arguments
11329 while Present (Arg_Node) loop
11330 Check_No_Identifier (Arg_Node);
11332 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11333 -- will in fact generate reference, so that the entity will
11334 -- have a reference, which will inhibit any warnings about
11335 -- it not being referenced, and also properly show up in the
11336 -- ali file as a reference. But this reference is recorded
11337 -- before the Has_Pragma_Unreferenced flag is set, so that
11338 -- no warning is generated for this reference.
11340 Check_Arg_Is_Local_Name (Arg_Node);
11341 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11343 if Is_Entity_Name (Arg_Expr) then
11344 Arg_Ent := Entity (Arg_Expr);
11346 if not Is_Assignable (Arg_Ent) then
11348 ("pragma% can only be applied to a variable",
11351 Set_Has_Pragma_Unmodified (Arg_Ent);
11363 -- pragma Unreferenced (local_Name {, local_Name});
11365 -- or when used in a context clause:
11367 -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
11369 when Pragma_Unreferenced => Unreferenced : declare
11370 Arg_Node : Node_Id;
11371 Arg_Expr : Node_Id;
11372 Arg_Ent : Entity_Id;
11377 Check_At_Least_N_Arguments (1);
11379 -- Check case of appearing within context clause
11381 if Is_In_Context_Clause then
11383 -- The arguments must all be units mentioned in a with clause
11384 -- in the same context clause. Note we already checked (in
11385 -- Par.Prag) that the arguments are either identifiers or
11386 -- selected components.
11389 while Present (Arg_Node) loop
11390 Citem := First (List_Containing (N));
11391 while Citem /= N loop
11392 if Nkind (Citem) = N_With_Clause
11393 and then Same_Name (Name (Citem), Expression (Arg_Node))
11395 Set_Has_Pragma_Unreferenced
11398 (Library_Unit (Citem))));
11399 Set_Unit_Name (Expression (Arg_Node), Name (Citem));
11408 ("argument of pragma% is not with'ed unit", Arg_Node);
11414 -- Case of not in list of context items
11418 while Present (Arg_Node) loop
11419 Check_No_Identifier (Arg_Node);
11421 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11422 -- will in fact generate reference, so that the entity will
11423 -- have a reference, which will inhibit any warnings about
11424 -- it not being referenced, and also properly show up in the
11425 -- ali file as a reference. But this reference is recorded
11426 -- before the Has_Pragma_Unreferenced flag is set, so that
11427 -- no warning is generated for this reference.
11429 Check_Arg_Is_Local_Name (Arg_Node);
11430 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11432 if Is_Entity_Name (Arg_Expr) then
11433 Arg_Ent := Entity (Arg_Expr);
11435 -- If the entity is overloaded, the pragma applies to the
11436 -- most recent overloading, as documented. In this case,
11437 -- name resolution does not generate a reference, so it
11438 -- must be done here explicitly.
11440 if Is_Overloaded (Arg_Expr) then
11441 Generate_Reference (Arg_Ent, N);
11444 Set_Has_Pragma_Unreferenced (Arg_Ent);
11452 --------------------------
11453 -- Unreferenced_Objects --
11454 --------------------------
11456 -- pragma Unreferenced_Objects (local_Name {, local_Name});
11458 when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare
11459 Arg_Node : Node_Id;
11460 Arg_Expr : Node_Id;
11464 Check_At_Least_N_Arguments (1);
11467 while Present (Arg_Node) loop
11468 Check_No_Identifier (Arg_Node);
11469 Check_Arg_Is_Local_Name (Arg_Node);
11470 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11472 if not Is_Entity_Name (Arg_Expr)
11473 or else not Is_Type (Entity (Arg_Expr))
11476 ("argument for pragma% must be type or subtype", Arg_Node);
11479 Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr));
11482 end Unreferenced_Objects;
11484 ------------------------------
11485 -- Unreserve_All_Interrupts --
11486 ------------------------------
11488 -- pragma Unreserve_All_Interrupts;
11490 when Pragma_Unreserve_All_Interrupts =>
11492 Check_Arg_Count (0);
11494 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
11495 Unreserve_All_Interrupts := True;
11502 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
11504 when Pragma_Unsuppress =>
11506 Process_Suppress_Unsuppress (False);
11508 -------------------
11509 -- Use_VADS_Size --
11510 -------------------
11512 -- pragma Use_VADS_Size;
11514 when Pragma_Use_VADS_Size =>
11516 Check_Arg_Count (0);
11517 Check_Valid_Configuration_Pragma;
11518 Use_VADS_Size := True;
11520 ---------------------
11521 -- Validity_Checks --
11522 ---------------------
11524 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
11526 when Pragma_Validity_Checks => Validity_Checks : declare
11527 A : constant Node_Id := Expression (Arg1);
11533 Check_Arg_Count (1);
11534 Check_No_Identifiers;
11536 if Nkind (A) = N_String_Literal then
11540 Slen : constant Natural := Natural (String_Length (S));
11541 Options : String (1 .. Slen);
11547 C := Get_String_Char (S, Int (J));
11548 exit when not In_Character_Range (C);
11549 Options (J) := Get_Character (C);
11552 Set_Validity_Check_Options (Options);
11560 elsif Nkind (A) = N_Identifier then
11562 if Chars (A) = Name_All_Checks then
11563 Set_Validity_Check_Options ("a");
11565 elsif Chars (A) = Name_On then
11566 Validity_Checks_On := True;
11568 elsif Chars (A) = Name_Off then
11569 Validity_Checks_On := False;
11573 end Validity_Checks;
11579 -- pragma Volatile (LOCAL_NAME);
11581 when Pragma_Volatile =>
11582 Process_Atomic_Shared_Volatile;
11584 -------------------------
11585 -- Volatile_Components --
11586 -------------------------
11588 -- pragma Volatile_Components (array_LOCAL_NAME);
11590 -- Volatile is handled by the same circuit as Atomic_Components
11596 -- pragma Warnings (On | Off);
11597 -- pragma Warnings (On | Off, LOCAL_NAME);
11598 -- pragma Warnings (static_string_EXPRESSION);
11599 -- pragma Warnings (On | Off, STRING_LITERAL);
11601 when Pragma_Warnings => Warnings : begin
11603 Check_At_Least_N_Arguments (1);
11604 Check_No_Identifiers;
11607 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
11610 -- One argument case
11612 if Arg_Count = 1 then
11614 -- On/Off one argument case was processed by parser
11616 if Nkind (Argx) = N_Identifier
11618 (Chars (Argx) = Name_On
11620 Chars (Argx) = Name_Off)
11624 -- One argument case must be ON/OFF or static string expr
11626 elsif not Is_Static_String_Expression (Arg1) then
11628 ("argument of pragma% must be On/Off or " &
11629 "static string expression", Arg2);
11631 -- One argument string expression case
11635 Lit : constant Node_Id := Expr_Value_S (Argx);
11636 Str : constant String_Id := Strval (Lit);
11637 Len : constant Nat := String_Length (Str);
11645 while J <= Len loop
11646 C := Get_String_Char (Str, J);
11647 OK := In_Character_Range (C);
11650 Chr := Get_Character (C);
11654 if J < Len and then Chr = '.' then
11656 C := Get_String_Char (Str, J);
11657 Chr := Get_Character (C);
11659 if not Set_Dot_Warning_Switch (Chr) then
11661 ("invalid warning switch character " &
11668 OK := Set_Warning_Switch (Chr);
11674 ("invalid warning switch character " & Chr,
11683 -- Two or more arguments (must be two)
11686 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
11687 Check_At_Most_N_Arguments (2);
11695 E_Id := Expression (Arg2);
11698 -- In the expansion of an inlined body, a reference to
11699 -- the formal may be wrapped in a conversion if the
11700 -- actual is a conversion. Retrieve the real entity name.
11702 if (In_Instance_Body
11703 or else In_Inlined_Body)
11704 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
11706 E_Id := Expression (E_Id);
11709 -- Entity name case
11711 if Is_Entity_Name (E_Id) then
11712 E := Entity (E_Id);
11719 (E, (Chars (Expression (Arg1)) = Name_Off));
11721 if Chars (Expression (Arg1)) = Name_Off
11722 and then Warn_On_Warnings_Off
11724 Warnings_Off_Pragmas.Append ((N, E));
11727 if Is_Enumeration_Type (E) then
11731 Lit := First_Literal (E);
11732 while Present (Lit) loop
11733 Set_Warnings_Off (Lit);
11734 Next_Literal (Lit);
11739 exit when No (Homonym (E));
11744 -- Error if not entity or static string literal case
11746 elsif not Is_Static_String_Expression (Arg2) then
11748 ("second argument of pragma% must be entity " &
11749 "name or static string expression", Arg2);
11751 -- String literal case
11754 String_To_Name_Buffer
11755 (Strval (Expr_Value_S (Expression (Arg2))));
11757 -- Note on configuration pragma case: If this is a
11758 -- configuration pragma, then for an OFF pragma, we
11759 -- just set Config True in the call, which is all
11760 -- that needs to be done. For the case of ON, this
11761 -- is normally an error, unless it is canceling the
11762 -- effect of a previous OFF pragma in the same file.
11763 -- In any other case, an error will be signalled (ON
11764 -- with no matching OFF).
11766 if Chars (Argx) = Name_Off then
11767 Set_Specific_Warning_Off
11768 (Loc, Name_Buffer (1 .. Name_Len),
11769 Config => Is_Configuration_Pragma);
11771 elsif Chars (Argx) = Name_On then
11772 Set_Specific_Warning_On
11773 (Loc, Name_Buffer (1 .. Name_Len), Err);
11777 ("?pragma Warnings On with no " &
11778 "matching Warnings Off",
11788 -------------------
11789 -- Weak_External --
11790 -------------------
11792 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
11794 when Pragma_Weak_External => Weak_External : declare
11799 Check_Arg_Count (1);
11800 Check_Optional_Identifier (Arg1, Name_Entity);
11801 Check_Arg_Is_Library_Level_Local_Name (Arg1);
11802 Ent := Entity (Expression (Arg1));
11804 if Rep_Item_Too_Early (Ent, N) then
11807 Ent := Underlying_Type (Ent);
11810 -- The only processing required is to link this item on to the
11811 -- list of rep items for the given entity. This is accomplished
11812 -- by the call to Rep_Item_Too_Late (when no error is detected
11813 -- and False is returned).
11815 if Rep_Item_Too_Late (Ent, N) then
11818 Set_Has_Gigi_Rep_Item (Ent);
11822 -----------------------------
11823 -- Wide_Character_Encoding --
11824 -----------------------------
11826 -- pragma Wide_Character_Encoding (IDENTIFIER);
11828 when Pragma_Wide_Character_Encoding =>
11830 -- Nothing to do, handled in parser. Note that we do not enforce
11831 -- configuration pragma placement, this pragma can appear at any
11832 -- place in the source, allowing mixed encodings within a single
11837 --------------------
11838 -- Unknown_Pragma --
11839 --------------------
11841 -- Should be impossible, since the case of an unknown pragma is
11842 -- separately processed before the case statement is entered.
11844 when Unknown_Pragma =>
11845 raise Program_Error;
11849 when Pragma_Exit => null;
11850 end Analyze_Pragma;
11852 -------------------
11853 -- Check_Enabled --
11854 -------------------
11856 function Check_Enabled (Nam : Name_Id) return Boolean is
11860 PP := Opt.Check_Policy_List;
11863 return Assertions_Enabled;
11866 Nam = Chars (Expression (First (Pragma_Argument_Associations (PP))))
11869 Chars (Expression (Last (Pragma_Argument_Associations (PP))))
11871 when Name_On | Name_Check =>
11873 when Name_Off | Name_Ignore =>
11876 raise Program_Error;
11880 PP := Next_Pragma (PP);
11885 ---------------------------------
11886 -- Delay_Config_Pragma_Analyze --
11887 ---------------------------------
11889 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
11891 return Pragma_Name (N) = Name_Interrupt_State
11893 Pragma_Name (N) = Name_Priority_Specific_Dispatching;
11894 end Delay_Config_Pragma_Analyze;
11896 -------------------------
11897 -- Get_Base_Subprogram --
11898 -------------------------
11900 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
11901 Result : Entity_Id;
11904 -- Follow subprogram renaming chain
11907 while Is_Subprogram (Result)
11909 (Is_Generic_Instance (Result)
11910 or else Nkind (Parent (Declaration_Node (Result))) =
11911 N_Subprogram_Renaming_Declaration)
11912 and then Present (Alias (Result))
11914 Result := Alias (Result);
11918 end Get_Base_Subprogram;
11920 --------------------
11921 -- Get_Pragma_Arg --
11922 --------------------
11924 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
11926 if Nkind (Arg) = N_Pragma_Argument_Association then
11927 return Expression (Arg);
11931 end Get_Pragma_Arg;
11937 procedure Initialize is
11942 -----------------------------
11943 -- Is_Config_Static_String --
11944 -----------------------------
11946 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
11948 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
11949 -- This is an internal recursive function that is just like the
11950 -- outer function except that it adds the string to the name buffer
11951 -- rather than placing the string in the name buffer.
11953 ------------------------------
11954 -- Add_Config_Static_String --
11955 ------------------------------
11957 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
11964 if Nkind (N) = N_Op_Concat then
11965 if Add_Config_Static_String (Left_Opnd (N)) then
11966 N := Right_Opnd (N);
11972 if Nkind (N) /= N_String_Literal then
11973 Error_Msg_N ("string literal expected for pragma argument", N);
11977 for J in 1 .. String_Length (Strval (N)) loop
11978 C := Get_String_Char (Strval (N), J);
11980 if not In_Character_Range (C) then
11982 ("string literal contains invalid wide character",
11983 Sloc (N) + 1 + Source_Ptr (J));
11987 Add_Char_To_Name_Buffer (Get_Character (C));
11992 end Add_Config_Static_String;
11994 -- Start of processing for Is_Config_Static_String
11999 return Add_Config_Static_String (Arg);
12000 end Is_Config_Static_String;
12002 -----------------------------------------
12003 -- Is_Non_Significant_Pragma_Reference --
12004 -----------------------------------------
12006 -- This function makes use of the following static table which indicates
12007 -- whether a given pragma is significant. A value of -1 in this table
12008 -- indicates that the reference is significant. A value of zero indicates
12009 -- than appearance as any argument is insignificant, a positive value
12010 -- indicates that appearance in that parameter position is significant.
12012 -- A value of 99 flags a special case requiring a special check (this is
12013 -- used for cases not covered by this standard encoding, e.g. pragma Check
12014 -- where the first argument is not significant, but the others are).
12016 Sig_Flags : constant array (Pragma_Id) of Int :=
12017 (Pragma_AST_Entry => -1,
12018 Pragma_Abort_Defer => -1,
12019 Pragma_Ada_83 => -1,
12020 Pragma_Ada_95 => -1,
12021 Pragma_Ada_05 => -1,
12022 Pragma_Ada_2005 => -1,
12023 Pragma_All_Calls_Remote => -1,
12024 Pragma_Annotate => -1,
12025 Pragma_Assert => -1,
12026 Pragma_Assertion_Policy => 0,
12027 Pragma_Asynchronous => -1,
12028 Pragma_Atomic => 0,
12029 Pragma_Atomic_Components => 0,
12030 Pragma_Attach_Handler => -1,
12031 Pragma_Check => 99,
12032 Pragma_Check_Name => 0,
12033 Pragma_Check_Policy => 0,
12034 Pragma_CIL_Constructor => -1,
12035 Pragma_CPP_Class => 0,
12036 Pragma_CPP_Constructor => 0,
12037 Pragma_CPP_Virtual => 0,
12038 Pragma_CPP_Vtable => 0,
12039 Pragma_C_Pass_By_Copy => 0,
12040 Pragma_Comment => 0,
12041 Pragma_Common_Object => -1,
12042 Pragma_Compile_Time_Error => -1,
12043 Pragma_Compile_Time_Warning => -1,
12044 Pragma_Compiler_Unit => 0,
12045 Pragma_Complete_Representation => 0,
12046 Pragma_Complex_Representation => 0,
12047 Pragma_Component_Alignment => -1,
12048 Pragma_Controlled => 0,
12049 Pragma_Convention => 0,
12050 Pragma_Convention_Identifier => 0,
12051 Pragma_Debug => -1,
12052 Pragma_Debug_Policy => 0,
12053 Pragma_Detect_Blocking => -1,
12054 Pragma_Discard_Names => 0,
12055 Pragma_Elaborate => -1,
12056 Pragma_Elaborate_All => -1,
12057 Pragma_Elaborate_Body => -1,
12058 Pragma_Elaboration_Checks => -1,
12059 Pragma_Eliminate => -1,
12060 Pragma_Export => -1,
12061 Pragma_Export_Exception => -1,
12062 Pragma_Export_Function => -1,
12063 Pragma_Export_Object => -1,
12064 Pragma_Export_Procedure => -1,
12065 Pragma_Export_Value => -1,
12066 Pragma_Export_Valued_Procedure => -1,
12067 Pragma_Extend_System => -1,
12068 Pragma_Extensions_Allowed => -1,
12069 Pragma_External => -1,
12070 Pragma_Favor_Top_Level => -1,
12071 Pragma_External_Name_Casing => -1,
12072 Pragma_Fast_Math => -1,
12073 Pragma_Finalize_Storage_Only => 0,
12074 Pragma_Float_Representation => 0,
12075 Pragma_Ident => -1,
12076 Pragma_Implemented_By_Entry => -1,
12077 Pragma_Implicit_Packing => 0,
12078 Pragma_Import => +2,
12079 Pragma_Import_Exception => 0,
12080 Pragma_Import_Function => 0,
12081 Pragma_Import_Object => 0,
12082 Pragma_Import_Procedure => 0,
12083 Pragma_Import_Valued_Procedure => 0,
12084 Pragma_Initialize_Scalars => -1,
12085 Pragma_Inline => 0,
12086 Pragma_Inline_Always => 0,
12087 Pragma_Inline_Generic => 0,
12088 Pragma_Inspection_Point => -1,
12089 Pragma_Interface => +2,
12090 Pragma_Interface_Name => +2,
12091 Pragma_Interrupt_Handler => -1,
12092 Pragma_Interrupt_Priority => -1,
12093 Pragma_Interrupt_State => -1,
12094 Pragma_Java_Constructor => -1,
12095 Pragma_Java_Interface => -1,
12096 Pragma_Keep_Names => 0,
12097 Pragma_License => -1,
12098 Pragma_Link_With => -1,
12099 Pragma_Linker_Alias => -1,
12100 Pragma_Linker_Constructor => -1,
12101 Pragma_Linker_Destructor => -1,
12102 Pragma_Linker_Options => -1,
12103 Pragma_Linker_Section => -1,
12105 Pragma_Locking_Policy => -1,
12106 Pragma_Long_Float => -1,
12107 Pragma_Machine_Attribute => -1,
12109 Pragma_Main_Storage => -1,
12110 Pragma_Memory_Size => -1,
12111 Pragma_No_Return => 0,
12112 Pragma_No_Body => 0,
12113 Pragma_No_Run_Time => -1,
12114 Pragma_No_Strict_Aliasing => -1,
12115 Pragma_Normalize_Scalars => -1,
12116 Pragma_Obsolescent => 0,
12117 Pragma_Optimize => -1,
12118 Pragma_Optimize_Alignment => -1,
12121 Pragma_Passive => -1,
12122 Pragma_Preelaborable_Initialization => -1,
12123 Pragma_Polling => -1,
12124 Pragma_Persistent_BSS => 0,
12125 Pragma_Postcondition => -1,
12126 Pragma_Precondition => -1,
12127 Pragma_Preelaborate => -1,
12128 Pragma_Preelaborate_05 => -1,
12129 Pragma_Priority => -1,
12130 Pragma_Priority_Specific_Dispatching => -1,
12131 Pragma_Profile => 0,
12132 Pragma_Profile_Warnings => 0,
12133 Pragma_Propagate_Exceptions => -1,
12134 Pragma_Psect_Object => -1,
12136 Pragma_Pure_05 => -1,
12137 Pragma_Pure_Function => -1,
12138 Pragma_Queuing_Policy => -1,
12139 Pragma_Ravenscar => -1,
12140 Pragma_Relative_Deadline => -1,
12141 Pragma_Remote_Call_Interface => -1,
12142 Pragma_Remote_Types => -1,
12143 Pragma_Restricted_Run_Time => -1,
12144 Pragma_Restriction_Warnings => -1,
12145 Pragma_Restrictions => -1,
12146 Pragma_Reviewable => -1,
12147 Pragma_Share_Generic => -1,
12148 Pragma_Shared => -1,
12149 Pragma_Shared_Passive => -1,
12150 Pragma_Source_File_Name => -1,
12151 Pragma_Source_File_Name_Project => -1,
12152 Pragma_Source_Reference => -1,
12153 Pragma_Storage_Size => -1,
12154 Pragma_Storage_Unit => -1,
12155 Pragma_Static_Elaboration_Desired => -1,
12156 Pragma_Stream_Convert => -1,
12157 Pragma_Style_Checks => -1,
12158 Pragma_Subtitle => -1,
12159 Pragma_Suppress => 0,
12160 Pragma_Suppress_Exception_Locations => 0,
12161 Pragma_Suppress_All => -1,
12162 Pragma_Suppress_Debug_Info => 0,
12163 Pragma_Suppress_Initialization => 0,
12164 Pragma_System_Name => -1,
12165 Pragma_Task_Dispatching_Policy => -1,
12166 Pragma_Task_Info => -1,
12167 Pragma_Task_Name => -1,
12168 Pragma_Task_Storage => 0,
12169 Pragma_Time_Slice => -1,
12170 Pragma_Title => -1,
12171 Pragma_Unchecked_Union => 0,
12172 Pragma_Unimplemented_Unit => -1,
12173 Pragma_Universal_Aliasing => -1,
12174 Pragma_Universal_Data => -1,
12175 Pragma_Unmodified => -1,
12176 Pragma_Unreferenced => -1,
12177 Pragma_Unreferenced_Objects => -1,
12178 Pragma_Unreserve_All_Interrupts => -1,
12179 Pragma_Unsuppress => 0,
12180 Pragma_Use_VADS_Size => -1,
12181 Pragma_Validity_Checks => -1,
12182 Pragma_Volatile => 0,
12183 Pragma_Volatile_Components => 0,
12184 Pragma_Warnings => -1,
12185 Pragma_Weak_External => -1,
12186 Pragma_Wide_Character_Encoding => 0,
12187 Unknown_Pragma => 0);
12189 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
12198 if Nkind (P) /= N_Pragma_Argument_Association then
12202 Id := Get_Pragma_Id (Parent (P));
12203 C := Sig_Flags (Id);
12215 -- For pragma Check, the first argument is not significant,
12216 -- the second and the third (if present) arguments are
12219 when Pragma_Check =>
12221 P = First (Pragma_Argument_Associations (Parent (P)));
12224 raise Program_Error;
12228 A := First (Pragma_Argument_Associations (Parent (P)));
12229 for J in 1 .. C - 1 loop
12237 return A = P; -- is this wrong way round ???
12240 end Is_Non_Significant_Pragma_Reference;
12242 ------------------------------
12243 -- Is_Pragma_String_Literal --
12244 ------------------------------
12246 -- This function returns true if the corresponding pragma argument is
12247 -- a static string expression. These are the only cases in which string
12248 -- literals can appear as pragma arguments. We also allow a string
12249 -- literal as the first argument to pragma Assert (although it will
12250 -- of course always generate a type error).
12252 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
12253 Pragn : constant Node_Id := Parent (Par);
12254 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
12255 Pname : constant Name_Id := Pragma_Name (Pragn);
12261 N := First (Assoc);
12268 if Pname = Name_Assert then
12271 elsif Pname = Name_Export then
12274 elsif Pname = Name_Ident then
12277 elsif Pname = Name_Import then
12280 elsif Pname = Name_Interface_Name then
12283 elsif Pname = Name_Linker_Alias then
12286 elsif Pname = Name_Linker_Section then
12289 elsif Pname = Name_Machine_Attribute then
12292 elsif Pname = Name_Source_File_Name then
12295 elsif Pname = Name_Source_Reference then
12298 elsif Pname = Name_Title then
12301 elsif Pname = Name_Subtitle then
12307 end Is_Pragma_String_Literal;
12309 --------------------------------------
12310 -- Process_Compilation_Unit_Pragmas --
12311 --------------------------------------
12313 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
12315 -- A special check for pragma Suppress_All. This is a strange DEC
12316 -- pragma, strange because it comes at the end of the unit. If we
12317 -- have a pragma Suppress_All in the Pragmas_After of the current
12318 -- unit, then we insert a pragma Suppress (All_Checks) at the start
12319 -- of the context clause to ensure the correct processing.
12322 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
12326 if Present (PA) then
12328 while Present (P) loop
12329 if Pragma_Name (P) = Name_Suppress_All then
12330 Prepend_To (Context_Items (N),
12331 Make_Pragma (Sloc (P),
12332 Chars => Name_Suppress,
12333 Pragma_Argument_Associations => New_List (
12334 Make_Pragma_Argument_Association (Sloc (P),
12336 Make_Identifier (Sloc (P),
12337 Chars => Name_All_Checks)))));
12345 end Process_Compilation_Unit_Pragmas;
12356 --------------------------------
12357 -- Set_Encoded_Interface_Name --
12358 --------------------------------
12360 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
12361 Str : constant String_Id := Strval (S);
12362 Len : constant Int := String_Length (Str);
12367 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
12370 -- Stores encoded value of character code CC. The encoding we
12371 -- use an underscore followed by four lower case hex digits.
12377 procedure Encode is
12379 Store_String_Char (Get_Char_Code ('_'));
12381 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
12383 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
12385 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
12387 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
12390 -- Start of processing for Set_Encoded_Interface_Name
12393 -- If first character is asterisk, this is a link name, and we
12394 -- leave it completely unmodified. We also ignore null strings
12395 -- (the latter case happens only in error cases) and no encoding
12396 -- should occur for Java or AAMP interface names.
12399 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
12400 or else VM_Target /= No_VM
12401 or else AAMP_On_Target
12403 Set_Interface_Name (E, S);
12408 CC := Get_String_Char (Str, J);
12410 exit when not In_Character_Range (CC);
12412 C := Get_Character (CC);
12414 exit when C /= '_' and then C /= '$'
12415 and then C not in '0' .. '9'
12416 and then C not in 'a' .. 'z'
12417 and then C not in 'A' .. 'Z';
12420 Set_Interface_Name (E, S);
12428 -- Here we need to encode. The encoding we use as follows:
12429 -- three underscores + four hex digits (lower case)
12433 for J in 1 .. String_Length (Str) loop
12434 CC := Get_String_Char (Str, J);
12436 if not In_Character_Range (CC) then
12439 C := Get_Character (CC);
12441 if C = '_' or else C = '$'
12442 or else C in '0' .. '9'
12443 or else C in 'a' .. 'z'
12444 or else C in 'A' .. 'Z'
12446 Store_String_Char (CC);
12453 Set_Interface_Name (E,
12454 Make_String_Literal (Sloc (S),
12455 Strval => End_String));
12457 end Set_Encoded_Interface_Name;
12459 -------------------
12460 -- Set_Unit_Name --
12461 -------------------
12463 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
12468 if Nkind (N) = N_Identifier
12469 and then Nkind (With_Item) = N_Identifier
12471 Set_Entity (N, Entity (With_Item));
12473 elsif Nkind (N) = N_Selected_Component then
12474 Change_Selected_Component_To_Expanded_Name (N);
12475 Set_Entity (N, Entity (With_Item));
12476 Set_Entity (Selector_Name (N), Entity (N));
12478 Pref := Prefix (N);
12479 Scop := Scope (Entity (N));
12480 while Nkind (Pref) = N_Selected_Component loop
12481 Change_Selected_Component_To_Expanded_Name (Pref);
12482 Set_Entity (Selector_Name (Pref), Scop);
12483 Set_Entity (Pref, Scop);
12484 Pref := Prefix (Pref);
12485 Scop := Scope (Scop);
12488 Set_Entity (Pref, Scop);
OSDN Git Service
