1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2009, 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_Ch12; use Sem_Ch12;
57 with Sem_Ch13; use Sem_Ch13;
58 with Sem_Dist; use Sem_Dist;
59 with Sem_Elim; use Sem_Elim;
60 with Sem_Eval; use Sem_Eval;
61 with Sem_Intr; use Sem_Intr;
62 with Sem_Mech; use Sem_Mech;
63 with Sem_Res; use Sem_Res;
64 with Sem_Type; use Sem_Type;
65 with Sem_Util; use Sem_Util;
66 with Sem_VFpt; use Sem_VFpt;
67 with Sem_Warn; use Sem_Warn;
68 with Stand; use Stand;
69 with Sinfo; use Sinfo;
70 with Sinfo.CN; use Sinfo.CN;
71 with Sinput; use Sinput;
72 with Snames; use Snames;
73 with Stringt; use Stringt;
74 with Stylesw; use Stylesw;
76 with Targparm; use Targparm;
77 with Tbuild; use Tbuild;
79 with Uintp; use Uintp;
80 with Uname; use Uname;
81 with Urealp; use Urealp;
82 with Validsw; use Validsw;
84 package body Sem_Prag is
86 ----------------------------------------------
87 -- Common Handling of Import-Export Pragmas --
88 ----------------------------------------------
90 -- In the following section, a number of Import_xxx and Export_xxx
91 -- pragmas are defined by GNAT. These are compatible with the DEC
92 -- pragmas of the same name, and all have the following common
93 -- form and processing:
96 -- [Internal =>] LOCAL_NAME
97 -- [, [External =>] EXTERNAL_SYMBOL]
98 -- [, other optional parameters ]);
101 -- [Internal =>] LOCAL_NAME
102 -- [, [External =>] EXTERNAL_SYMBOL]
103 -- [, other optional parameters ]);
105 -- EXTERNAL_SYMBOL ::=
107 -- | static_string_EXPRESSION
109 -- The internal LOCAL_NAME designates the entity that is imported or
110 -- exported, and must refer to an entity in the current declarative
111 -- part (as required by the rules for LOCAL_NAME).
113 -- The external linker name is designated by the External parameter
114 -- if given, or the Internal parameter if not (if there is no External
115 -- parameter, the External parameter is a copy of the Internal name).
117 -- If the External parameter is given as a string, then this string
118 -- is treated as an external name (exactly as though it had been given
119 -- as an External_Name parameter for a normal Import pragma).
121 -- If the External parameter is given as an identifier (or there is no
122 -- External parameter, so that the Internal identifier is used), then
123 -- the external name is the characters of the identifier, translated
124 -- to all upper case letters for OpenVMS versions of GNAT, and to all
125 -- lower case letters for all other versions
127 -- Note: the external name specified or implied by any of these special
128 -- Import_xxx or Export_xxx pragmas override an external or link name
129 -- specified in a previous Import or Export pragma.
131 -- Note: these and all other DEC-compatible GNAT pragmas allow full
132 -- use of named notation, following the standard rules for subprogram
133 -- calls, i.e. parameters can be given in any order if named notation
134 -- is used, and positional and named notation can be mixed, subject to
135 -- the rule that all positional parameters must appear first.
137 -- Note: All these pragmas are implemented exactly following the DEC
138 -- design and implementation and are intended to be fully compatible
139 -- with the use of these pragmas in the DEC Ada compiler.
141 --------------------------------------------
142 -- Checking for Duplicated External Names --
143 --------------------------------------------
145 -- It is suspicious if two separate Export pragmas use the same external
146 -- name. The following table is used to diagnose this situation so that
147 -- an appropriate warning can be issued.
149 -- The Node_Id stored is for the N_String_Literal node created to
150 -- hold the value of the external name. The Sloc of this node is
151 -- used to cross-reference the location of the duplication.
153 package Externals is new Table.Table (
154 Table_Component_Type => Node_Id,
155 Table_Index_Type => Int,
156 Table_Low_Bound => 0,
157 Table_Initial => 100,
158 Table_Increment => 100,
159 Table_Name => "Name_Externals");
161 -------------------------------------
162 -- Local Subprograms and Variables --
163 -------------------------------------
165 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
166 -- This routine is used for possible casing adjustment of an explicit
167 -- external name supplied as a string literal (the node N), according
168 -- to the casing requirement of Opt.External_Name_Casing. If this is
169 -- set to As_Is, then the string literal is returned unchanged, but if
170 -- it is set to Uppercase or Lowercase, then a new string literal with
171 -- appropriate casing is constructed.
173 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
174 -- If Def_Id refers to a renamed subprogram, then the base subprogram
175 -- (the original one, following the renaming chain) is returned.
176 -- Otherwise the entity is returned unchanged. Should be in Einfo???
178 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
179 -- All the routines that check pragma arguments take either a pragma
180 -- argument association (in which case the expression of the argument
181 -- association is checked), or the expression directly. The function
182 -- Get_Pragma_Arg is a utility used to deal with these two cases. If Arg
183 -- is a pragma argument association node, then its expression is returned,
184 -- otherwise Arg is returned unchanged.
187 -- This is a dummy function called by the processing for pragma Reviewable.
188 -- It is there for assisting front end debugging. By placing a Reviewable
189 -- pragma in the source program, a breakpoint on rv catches this place in
190 -- the source, allowing convenient stepping to the point of interest.
192 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
193 -- Place semantic information on the argument of an Elaborate or
194 -- Elaborate_All pragma. Entity name for unit and its parents is
195 -- taken from item in previous with_clause that mentions the unit.
197 -------------------------------
198 -- Adjust_External_Name_Case --
199 -------------------------------
201 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
205 -- Adjust case of literal if required
207 if Opt.External_Name_Exp_Casing = As_Is then
211 -- Copy existing string
217 for J in 1 .. String_Length (Strval (N)) loop
218 CC := Get_String_Char (Strval (N), J);
220 if Opt.External_Name_Exp_Casing = Uppercase
221 and then CC >= Get_Char_Code ('a')
222 and then CC <= Get_Char_Code ('z')
224 Store_String_Char (CC - 32);
226 elsif Opt.External_Name_Exp_Casing = Lowercase
227 and then CC >= Get_Char_Code ('A')
228 and then CC <= Get_Char_Code ('Z')
230 Store_String_Char (CC + 32);
233 Store_String_Char (CC);
238 Make_String_Literal (Sloc (N),
239 Strval => End_String);
241 end Adjust_External_Name_Case;
243 ------------------------------
244 -- Analyze_PPC_In_Decl_Part --
245 ------------------------------
247 procedure Analyze_PPC_In_Decl_Part (N : Node_Id; S : Entity_Id) is
248 Arg1 : constant Node_Id :=
249 First (Pragma_Argument_Associations (N));
250 Arg2 : constant Node_Id := Next (Arg1);
253 -- Install formals and push subprogram spec onto scope stack
254 -- so that we can see the formals from the pragma.
259 -- Preanalyze the boolean expression, we treat this as a
260 -- spec expression (i.e. similar to a default expression).
262 Preanalyze_Spec_Expression
263 (Get_Pragma_Arg (Arg1), Standard_Boolean);
265 -- If there is a message argument, analyze it the same way
267 if Present (Arg2) then
268 Preanalyze_Spec_Expression
269 (Get_Pragma_Arg (Arg2), Standard_String);
272 -- Remove the subprogram from the scope stack now that the
273 -- pre-analysis of the precondition/postcondition is done.
276 end Analyze_PPC_In_Decl_Part;
282 procedure Analyze_Pragma (N : Node_Id) is
283 Loc : constant Source_Ptr := Sloc (N);
284 Pname : constant Name_Id := Pragma_Name (N);
287 Pragma_Exit : exception;
288 -- This exception is used to exit pragma processing completely. It
289 -- is used when an error is detected, and no further processing is
290 -- required. It is also used if an earlier error has left the tree
291 -- in a state where the pragma should not be processed.
294 -- Number of pragma argument associations
300 -- First four pragma arguments (pragma argument association nodes,
301 -- or Empty if the corresponding argument does not exist).
303 type Name_List is array (Natural range <>) of Name_Id;
304 type Args_List is array (Natural range <>) of Node_Id;
305 -- Types used for arguments to Check_Arg_Order and Gather_Associations
307 procedure Ada_2005_Pragma;
308 -- Called for pragmas defined in Ada 2005, that are not in Ada 95. In
309 -- Ada 95 mode, these are implementation defined pragmas, so should be
310 -- caught by the No_Implementation_Pragmas restriction
312 procedure Check_Ada_83_Warning;
313 -- Issues a warning message for the current pragma if operating in Ada
314 -- 83 mode (used for language pragmas that are not a standard part of
315 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
318 procedure Check_Arg_Count (Required : Nat);
319 -- Check argument count for pragma is equal to given parameter.
320 -- If not, then issue an error message and raise Pragma_Exit.
322 -- Note: all routines whose name is Check_Arg_Is_xxx take an
323 -- argument Arg which can either be a pragma argument association,
324 -- in which case the check is applied to the expression of the
325 -- association or an expression directly.
327 procedure Check_Arg_Is_External_Name (Arg : Node_Id);
328 -- Check that an argument has the right form for an EXTERNAL_NAME
329 -- parameter of an extended import/export pragma. The rule is that
330 -- the name must be an identifier or string literal (in Ada 83 mode)
331 -- or a static string expression (in Ada 95 mode).
333 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
334 -- Check the specified argument Arg to make sure that it is an
335 -- identifier. If not give error and raise Pragma_Exit.
337 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
338 -- Check the specified argument Arg to make sure that it is an
339 -- integer literal. If not give error and raise Pragma_Exit.
341 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
342 -- Check the specified argument Arg to make sure that it has the
343 -- proper syntactic form for a local name and meets the semantic
344 -- requirements for a local name. The local name is analyzed as
345 -- part of the processing for this call. In addition, the local
346 -- name is required to represent an entity at the library level.
348 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
349 -- Check the specified argument Arg to make sure that it has the
350 -- proper syntactic form for a local name and meets the semantic
351 -- requirements for a local name. The local name is analyzed as
352 -- part of the processing for this call.
354 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
355 -- Check the specified argument Arg to make sure that it is a valid
356 -- locking policy name. If not give error and raise Pragma_Exit.
358 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
359 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
360 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3, N4 : Name_Id);
361 -- Check the specified argument Arg to make sure that it is an
362 -- identifier whose name matches either N1 or N2 (or N3 if present).
363 -- If not then give error and raise Pragma_Exit.
365 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
366 -- Check the specified argument Arg to make sure that it is a valid
367 -- queuing policy name. If not give error and raise Pragma_Exit.
369 procedure Check_Arg_Is_Static_Expression
372 -- Check the specified argument Arg to make sure that it is a static
373 -- expression of the given type (i.e. it will be analyzed and resolved
374 -- using this type, which can be any valid argument to Resolve, e.g.
375 -- Any_Integer is OK). If not, given error and raise Pragma_Exit.
377 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
378 -- Check the specified argument Arg to make sure that it is a
379 -- string literal. If not give error and raise Pragma_Exit
381 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
382 -- Check the specified argument Arg to make sure that it is a valid
383 -- valid task dispatching policy name. If not give error and raise
386 procedure Check_Arg_Order (Names : Name_List);
387 -- Checks for an instance of two arguments with identifiers for the
388 -- current pragma which are not in the sequence indicated by Names,
389 -- and if so, generates a fatal message about bad order of arguments.
391 procedure Check_At_Least_N_Arguments (N : Nat);
392 -- Check there are at least N arguments present
394 procedure Check_At_Most_N_Arguments (N : Nat);
395 -- Check there are no more than N arguments present
397 procedure Check_Component (Comp : Node_Id);
398 -- Examine Unchecked_Union component for correct use of per-object
399 -- constrained subtypes, and for restrictions on finalizable components.
401 procedure Check_Duplicated_Export_Name (Nam : Node_Id);
402 -- Nam is an N_String_Literal node containing the external name set
403 -- by an Import or Export pragma (or extended Import or Export pragma).
404 -- This procedure checks for possible duplications if this is the
405 -- export case, and if found, issues an appropriate error message.
407 procedure Check_First_Subtype (Arg : Node_Id);
408 -- Checks that Arg, whose expression is an entity name referencing
409 -- a subtype, does not reference a type that is not a first subtype.
411 procedure Check_In_Main_Program;
412 -- Common checks for pragmas that appear within a main program
413 -- (Priority, Main_Storage, Time_Slice, Relative_Deadline).
415 procedure Check_Interrupt_Or_Attach_Handler;
416 -- Common processing for first argument of pragma Interrupt_Handler
417 -- or pragma Attach_Handler.
419 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
420 -- Check that pragma appears in a declarative part, or in a package
421 -- specification, i.e. that it does not occur in a statement sequence
424 procedure Check_No_Identifier (Arg : Node_Id);
425 -- Checks that the given argument does not have an identifier. If
426 -- an identifier is present, then an error message is issued, and
427 -- Pragma_Exit is raised.
429 procedure Check_No_Identifiers;
430 -- Checks that none of the arguments to the pragma has an identifier.
431 -- If any argument has an identifier, then an error message is issued,
432 -- and Pragma_Exit is raised.
434 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
435 -- Checks if the given argument has an identifier, and if so, requires
436 -- it to match the given identifier name. If there is a non-matching
437 -- identifier, then an error message is given and Error_Pragmas raised.
439 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
440 -- Checks if the given argument has an identifier, and if so, requires
441 -- it to match the given identifier name. If there is a non-matching
442 -- identifier, then an error message is given and Error_Pragmas raised.
443 -- In this version of the procedure, the identifier name is given as
444 -- a string with lower case letters.
446 procedure Check_Precondition_Postcondition (In_Body : out Boolean);
447 -- Called to process a precondition or postcondition pragma. There are
450 -- The pragma appears after a subprogram spec
452 -- If the corresponding check is not enabled, the pragma is analyzed
453 -- but otherwise ignored and control returns with In_Body set False.
455 -- If the check is enabled, then the first step is to analyze the
456 -- pragma, but this is skipped if the subprogram spec appears within
457 -- a package specification (because this is the case where we delay
458 -- analysis till the end of the spec). Then (whether or not it was
459 -- analyzed), the pragma is chained to the subprogram in question
460 -- (using Spec_PPC_List and Next_Pragma) and control returns to the
461 -- caller with In_Body set False.
463 -- The pragma appears at the start of subprogram body declarations
465 -- In this case an immediate return to the caller is made with
466 -- In_Body set True, and the pragma is NOT analyzed.
468 -- In all other cases, an error message for bad placement is given
470 procedure Check_Static_Constraint (Constr : Node_Id);
471 -- Constr is a constraint from an N_Subtype_Indication node from a
472 -- component constraint in an Unchecked_Union type. This routine checks
473 -- that the constraint is static as required by the restrictions for
476 procedure Check_Valid_Configuration_Pragma;
477 -- Legality checks for placement of a configuration pragma
479 procedure Check_Valid_Library_Unit_Pragma;
480 -- Legality checks for library unit pragmas. A special case arises for
481 -- pragmas in generic instances that come from copies of the original
482 -- library unit pragmas in the generic templates. In the case of other
483 -- than library level instantiations these can appear in contexts which
484 -- would normally be invalid (they only apply to the original template
485 -- and to library level instantiations), and they are simply ignored,
486 -- which is implemented by rewriting them as null statements.
488 procedure Check_Variant (Variant : Node_Id);
489 -- Check Unchecked_Union variant for lack of nested variants and
490 -- presence of at least one component.
492 procedure Error_Pragma (Msg : String);
493 pragma No_Return (Error_Pragma);
494 -- Outputs error message for current pragma. The message contains a %
495 -- that will be replaced with the pragma name, and the flag is placed
496 -- on the pragma itself. Pragma_Exit is then raised.
498 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
499 pragma No_Return (Error_Pragma_Arg);
500 -- Outputs error message for current pragma. The message may contain
501 -- a % that will be replaced with the pragma name. The parameter Arg
502 -- may either be a pragma argument association, in which case the flag
503 -- is placed on the expression of this association, or an expression,
504 -- in which case the flag is placed directly on the expression. The
505 -- message is placed using Error_Msg_N, so the message may also contain
506 -- an & insertion character which will reference the given Arg value.
507 -- After placing the message, Pragma_Exit is raised.
509 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
510 pragma No_Return (Error_Pragma_Arg);
511 -- Similar to above form of Error_Pragma_Arg except that two messages
512 -- are provided, the second is a continuation comment starting with \.
514 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
515 pragma No_Return (Error_Pragma_Arg_Ident);
516 -- Outputs error message for current pragma. The message may contain
517 -- a % that will be replaced with the pragma name. The parameter Arg
518 -- must be a pragma argument association with a non-empty identifier
519 -- (i.e. its Chars field must be set), and the error message is placed
520 -- on the identifier. The message is placed using Error_Msg_N so
521 -- the message may also contain an & insertion character which will
522 -- reference the identifier. After placing the message, Pragma_Exit
525 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id);
526 pragma No_Return (Error_Pragma_Ref);
527 -- Outputs error message for current pragma. The message may contain
528 -- a % that will be replaced with the pragma name. The parameter Ref
529 -- must be an entity whose name can be referenced by & and sloc by #.
530 -- After placing the message, Pragma_Exit is raised.
532 function Find_Lib_Unit_Name return Entity_Id;
533 -- Used for a library unit pragma to find the entity to which the
534 -- library unit pragma applies, returns the entity found.
536 procedure Find_Program_Unit_Name (Id : Node_Id);
537 -- If the pragma is a compilation unit pragma, the id must denote the
538 -- compilation unit in the same compilation, and the pragma must appear
539 -- in the list of preceding or trailing pragmas. If it is a program
540 -- unit pragma that is not a compilation unit pragma, then the
541 -- identifier must be visible.
543 function Find_Unique_Parameterless_Procedure
545 Arg : Node_Id) return Entity_Id;
546 -- Used for a procedure pragma to find the unique parameterless
547 -- procedure identified by Name, returns it if it exists, otherwise
548 -- errors out and uses Arg as the pragma argument for the message.
550 procedure Gather_Associations
552 Args : out Args_List);
553 -- This procedure is used to gather the arguments for a pragma that
554 -- permits arbitrary ordering of parameters using the normal rules
555 -- for named and positional parameters. The Names argument is a list
556 -- of Name_Id values that corresponds to the allowed pragma argument
557 -- association identifiers in order. The result returned in Args is
558 -- a list of corresponding expressions that are the pragma arguments.
559 -- Note that this is a list of expressions, not of pragma argument
560 -- associations (Gather_Associations has completely checked all the
561 -- optional identifiers when it returns). An entry in Args is Empty
562 -- on return if the corresponding argument is not present.
564 procedure GNAT_Pragma;
565 -- Called for all GNAT defined pragmas to check the relevant restriction
566 -- (No_Implementation_Pragmas).
568 function Is_Before_First_Decl
569 (Pragma_Node : Node_Id;
570 Decls : List_Id) return Boolean;
571 -- Return True if Pragma_Node is before the first declarative item in
572 -- Decls where Decls is the list of declarative items.
574 function Is_Configuration_Pragma return Boolean;
575 -- Determines if the placement of the current pragma is appropriate
576 -- for a configuration pragma.
578 function Is_In_Context_Clause return Boolean;
579 -- Returns True if pragma appears within the context clause of a unit,
580 -- and False for any other placement (does not generate any messages).
582 function Is_Static_String_Expression (Arg : Node_Id) return Boolean;
583 -- Analyzes the argument, and determines if it is a static string
584 -- expression, returns True if so, False if non-static or not String.
586 procedure Pragma_Misplaced;
587 pragma No_Return (Pragma_Misplaced);
588 -- Issue fatal error message for misplaced pragma
590 procedure Process_Atomic_Shared_Volatile;
591 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
592 -- Shared is an obsolete Ada 83 pragma, treated as being identical
593 -- in effect to pragma Atomic.
595 procedure Process_Compile_Time_Warning_Or_Error;
596 -- Common processing for Compile_Time_Error and Compile_Time_Warning
598 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
599 -- Common processing for Convention, Interface, Import and Export.
600 -- Checks first two arguments of pragma, and sets the appropriate
601 -- convention value in the specified entity or entities. On return
602 -- C is the convention, E is the referenced entity.
604 procedure Process_Extended_Import_Export_Exception_Pragma
605 (Arg_Internal : Node_Id;
606 Arg_External : Node_Id;
609 -- Common processing for the pragmas Import/Export_Exception.
610 -- The three arguments correspond to the three named parameters of
611 -- the pragma. An argument is empty if the corresponding parameter
612 -- is not present in the pragma.
614 procedure Process_Extended_Import_Export_Object_Pragma
615 (Arg_Internal : Node_Id;
616 Arg_External : Node_Id;
618 -- Common processing for the pragmas Import/Export_Object.
619 -- The three arguments correspond to the three named parameters
620 -- of the pragmas. An argument is empty if the corresponding
621 -- parameter is not present in the pragma.
623 procedure Process_Extended_Import_Export_Internal_Arg
624 (Arg_Internal : Node_Id := Empty);
625 -- Common processing for all extended Import and Export pragmas. The
626 -- argument is the pragma parameter for the Internal argument. If
627 -- Arg_Internal is empty or inappropriate, an error message is posted.
628 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
629 -- set to identify the referenced entity.
631 procedure Process_Extended_Import_Export_Subprogram_Pragma
632 (Arg_Internal : Node_Id;
633 Arg_External : Node_Id;
634 Arg_Parameter_Types : Node_Id;
635 Arg_Result_Type : Node_Id := Empty;
636 Arg_Mechanism : Node_Id;
637 Arg_Result_Mechanism : Node_Id := Empty;
638 Arg_First_Optional_Parameter : Node_Id := Empty);
639 -- Common processing for all extended Import and Export pragmas
640 -- applying to subprograms. The caller omits any arguments that do
641 -- not apply to the pragma in question (for example, Arg_Result_Type
642 -- can be non-Empty only in the Import_Function and Export_Function
643 -- cases). The argument names correspond to the allowed pragma
644 -- association identifiers.
646 procedure Process_Generic_List;
647 -- Common processing for Share_Generic and Inline_Generic
649 procedure Process_Import_Or_Interface;
650 -- Common processing for Import of Interface
652 procedure Process_Inline (Active : Boolean);
653 -- Common processing for Inline and Inline_Always. The parameter
654 -- indicates if the inline pragma is active, i.e. if it should
655 -- actually cause inlining to occur.
657 procedure Process_Interface_Name
658 (Subprogram_Def : Entity_Id;
661 -- Given the last two arguments of pragma Import, pragma Export, or
662 -- pragma Interface_Name, performs validity checks and sets the
663 -- Interface_Name field of the given subprogram entity to the
664 -- appropriate external or link name, depending on the arguments
665 -- given. Ext_Arg is always present, but Link_Arg may be missing.
666 -- Note that Ext_Arg may represent the Link_Name if Link_Arg is
667 -- missing, and appropriate named notation is used for Ext_Arg.
668 -- If neither Ext_Arg nor Link_Arg is present, the interface name
669 -- is set to the default from the subprogram name.
671 procedure Process_Interrupt_Or_Attach_Handler;
672 -- Common processing for Interrupt and Attach_Handler pragmas
674 procedure Process_Restrictions_Or_Restriction_Warnings (Warn : Boolean);
675 -- Common processing for Restrictions and Restriction_Warnings pragmas.
676 -- Warn is True for Restriction_Warnings, or for Restrictions if the
677 -- flag Treat_Restrictions_As_Warnings is set, and False if this flag
678 -- is not set in the Restrictions case.
680 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
681 -- Common processing for Suppress and Unsuppress. The boolean parameter
682 -- Suppress_Case is True for the Suppress case, and False for the
685 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
686 -- This procedure sets the Is_Exported flag for the given entity,
687 -- checking that the entity was not previously imported. Arg is
688 -- the argument that specified the entity. A check is also made
689 -- for exporting inappropriate entities.
691 procedure Set_Extended_Import_Export_External_Name
692 (Internal_Ent : Entity_Id;
693 Arg_External : Node_Id);
694 -- Common processing for all extended import export pragmas. The first
695 -- argument, Internal_Ent, is the internal entity, which has already
696 -- been checked for validity by the caller. Arg_External is from the
697 -- Import or Export pragma, and may be null if no External parameter
698 -- was present. If Arg_External is present and is a non-null string
699 -- (a null string is treated as the default), then the Interface_Name
700 -- field of Internal_Ent is set appropriately.
702 procedure Set_Imported (E : Entity_Id);
703 -- This procedure sets the Is_Imported flag for the given entity,
704 -- checking that it is not previously exported or imported.
706 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
707 -- Mech is a parameter passing mechanism (see Import_Function syntax
708 -- for MECHANISM_NAME). This routine checks that the mechanism argument
709 -- has the right form, and if not issues an error message. If the
710 -- argument has the right form then the Mechanism field of Ent is
711 -- set appropriately.
713 procedure Set_Ravenscar_Profile (N : Node_Id);
714 -- Activate the set of configuration pragmas and restrictions that
715 -- make up the Ravenscar Profile. N is the corresponding pragma
716 -- node, which is used for error messages on any constructs
717 -- that violate the profile.
719 ---------------------
720 -- Ada_2005_Pragma --
721 ---------------------
723 procedure Ada_2005_Pragma is
725 if Ada_Version <= Ada_95 then
726 Check_Restriction (No_Implementation_Pragmas, N);
730 --------------------------
731 -- Check_Ada_83_Warning --
732 --------------------------
734 procedure Check_Ada_83_Warning is
736 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
737 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
739 end Check_Ada_83_Warning;
741 ---------------------
742 -- Check_Arg_Count --
743 ---------------------
745 procedure Check_Arg_Count (Required : Nat) is
747 if Arg_Count /= Required then
748 Error_Pragma ("wrong number of arguments for pragma%");
752 --------------------------------
753 -- Check_Arg_Is_External_Name --
754 --------------------------------
756 procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
757 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
760 if Nkind (Argx) = N_Identifier then
764 Analyze_And_Resolve (Argx, Standard_String);
766 if Is_OK_Static_Expression (Argx) then
769 elsif Etype (Argx) = Any_Type then
772 -- An interesting special case, if we have a string literal and
773 -- we are in Ada 83 mode, then we allow it even though it will
774 -- not be flagged as static. This allows expected Ada 83 mode
775 -- use of external names which are string literals, even though
776 -- technically these are not static in Ada 83.
778 elsif Ada_Version = Ada_83
779 and then Nkind (Argx) = N_String_Literal
783 -- Static expression that raises Constraint_Error. This has
784 -- already been flagged, so just exit from pragma processing.
786 elsif Is_Static_Expression (Argx) then
789 -- Here we have a real error (non-static expression)
792 Error_Msg_Name_1 := Pname;
794 ("argument for pragma% must be a identifier or " &
795 "static string expression!", Argx);
799 end Check_Arg_Is_External_Name;
801 -----------------------------
802 -- Check_Arg_Is_Identifier --
803 -----------------------------
805 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
806 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
808 if Nkind (Argx) /= N_Identifier then
810 ("argument for pragma% must be identifier", Argx);
812 end Check_Arg_Is_Identifier;
814 ----------------------------------
815 -- Check_Arg_Is_Integer_Literal --
816 ----------------------------------
818 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
819 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
821 if Nkind (Argx) /= N_Integer_Literal then
823 ("argument for pragma% must be integer literal", Argx);
825 end Check_Arg_Is_Integer_Literal;
827 -------------------------------------------
828 -- Check_Arg_Is_Library_Level_Local_Name --
829 -------------------------------------------
833 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
834 -- | library_unit_NAME
836 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
838 Check_Arg_Is_Local_Name (Arg);
840 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
841 and then Comes_From_Source (N)
844 ("argument for pragma% must be library level entity", Arg);
846 end Check_Arg_Is_Library_Level_Local_Name;
848 -----------------------------
849 -- Check_Arg_Is_Local_Name --
850 -----------------------------
854 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
855 -- | library_unit_NAME
857 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
858 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
863 if Nkind (Argx) not in N_Direct_Name
864 and then (Nkind (Argx) /= N_Attribute_Reference
865 or else Present (Expressions (Argx))
866 or else Nkind (Prefix (Argx)) /= N_Identifier)
867 and then (not Is_Entity_Name (Argx)
868 or else not Is_Compilation_Unit (Entity (Argx)))
870 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
873 if Is_Entity_Name (Argx)
874 and then Scope (Entity (Argx)) /= Current_Scope
877 ("pragma% argument must be in same declarative part", Arg);
879 end Check_Arg_Is_Local_Name;
881 ---------------------------------
882 -- Check_Arg_Is_Locking_Policy --
883 ---------------------------------
885 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
886 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
889 Check_Arg_Is_Identifier (Argx);
891 if not Is_Locking_Policy_Name (Chars (Argx)) then
893 ("& is not a valid locking policy name", Argx);
895 end Check_Arg_Is_Locking_Policy;
897 -------------------------
898 -- Check_Arg_Is_One_Of --
899 -------------------------
901 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
902 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
905 Check_Arg_Is_Identifier (Argx);
907 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
908 Error_Msg_Name_2 := N1;
909 Error_Msg_Name_3 := N2;
910 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
912 end Check_Arg_Is_One_Of;
914 procedure Check_Arg_Is_One_Of
916 N1, N2, N3 : Name_Id)
918 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
921 Check_Arg_Is_Identifier (Argx);
923 if Chars (Argx) /= N1
924 and then Chars (Argx) /= N2
925 and then Chars (Argx) /= N3
927 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
929 end Check_Arg_Is_One_Of;
931 procedure Check_Arg_Is_One_Of
933 N1, N2, N3, N4 : Name_Id)
935 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
938 Check_Arg_Is_Identifier (Argx);
940 if Chars (Argx) /= N1
941 and then Chars (Argx) /= N2
942 and then Chars (Argx) /= N3
943 and then Chars (Argx) /= N4
945 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
947 end Check_Arg_Is_One_Of;
949 ---------------------------------
950 -- Check_Arg_Is_Queuing_Policy --
951 ---------------------------------
953 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
954 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
957 Check_Arg_Is_Identifier (Argx);
959 if not Is_Queuing_Policy_Name (Chars (Argx)) then
961 ("& is not a valid queuing policy name", Argx);
963 end Check_Arg_Is_Queuing_Policy;
965 ------------------------------------
966 -- Check_Arg_Is_Static_Expression --
967 ------------------------------------
969 procedure Check_Arg_Is_Static_Expression
973 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
976 Analyze_And_Resolve (Argx, Typ);
978 if Is_OK_Static_Expression (Argx) then
981 elsif Etype (Argx) = Any_Type then
984 -- An interesting special case, if we have a string literal and
985 -- we are in Ada 83 mode, then we allow it even though it will
986 -- not be flagged as static. This allows the use of Ada 95
987 -- pragmas like Import in Ada 83 mode. They will of course be
988 -- flagged with warnings as usual, but will not cause errors.
990 elsif Ada_Version = Ada_83
991 and then Nkind (Argx) = N_String_Literal
995 -- Static expression that raises Constraint_Error. This has
996 -- already been flagged, so just exit from pragma processing.
998 elsif Is_Static_Expression (Argx) then
1001 -- Finally, we have a real error
1004 Error_Msg_Name_1 := Pname;
1005 Flag_Non_Static_Expr
1006 ("argument for pragma% must be a static expression!", Argx);
1009 end Check_Arg_Is_Static_Expression;
1011 ---------------------------------
1012 -- Check_Arg_Is_String_Literal --
1013 ---------------------------------
1015 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
1016 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1018 if Nkind (Argx) /= N_String_Literal then
1020 ("argument for pragma% must be string literal", Argx);
1022 end Check_Arg_Is_String_Literal;
1024 ------------------------------------------
1025 -- Check_Arg_Is_Task_Dispatching_Policy --
1026 ------------------------------------------
1028 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
1029 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1032 Check_Arg_Is_Identifier (Argx);
1034 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
1036 ("& is not a valid task dispatching policy name", Argx);
1038 end Check_Arg_Is_Task_Dispatching_Policy;
1040 ---------------------
1041 -- Check_Arg_Order --
1042 ---------------------
1044 procedure Check_Arg_Order (Names : Name_List) is
1047 Highest_So_Far : Natural := 0;
1048 -- Highest index in Names seen do far
1052 for J in 1 .. Arg_Count loop
1053 if Chars (Arg) /= No_Name then
1054 for K in Names'Range loop
1055 if Chars (Arg) = Names (K) then
1056 if K < Highest_So_Far then
1057 Error_Msg_Name_1 := Pname;
1059 ("parameters out of order for pragma%", Arg);
1060 Error_Msg_Name_1 := Names (K);
1061 Error_Msg_Name_2 := Names (Highest_So_Far);
1062 Error_Msg_N ("\% must appear before %", Arg);
1066 Highest_So_Far := K;
1074 end Check_Arg_Order;
1076 --------------------------------
1077 -- Check_At_Least_N_Arguments --
1078 --------------------------------
1080 procedure Check_At_Least_N_Arguments (N : Nat) is
1082 if Arg_Count < N then
1083 Error_Pragma ("too few arguments for pragma%");
1085 end Check_At_Least_N_Arguments;
1087 -------------------------------
1088 -- Check_At_Most_N_Arguments --
1089 -------------------------------
1091 procedure Check_At_Most_N_Arguments (N : Nat) is
1094 if Arg_Count > N then
1096 for J in 1 .. N loop
1098 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
1101 end Check_At_Most_N_Arguments;
1103 ---------------------
1104 -- Check_Component --
1105 ---------------------
1107 procedure Check_Component (Comp : Node_Id) is
1109 if Nkind (Comp) = N_Component_Declaration then
1111 Sindic : constant Node_Id :=
1112 Subtype_Indication (Component_Definition (Comp));
1113 Typ : constant Entity_Id :=
1114 Etype (Defining_Identifier (Comp));
1116 if Nkind (Sindic) = N_Subtype_Indication then
1118 -- Ada 2005 (AI-216): If a component subtype is subject to
1119 -- a per-object constraint, then the component type shall
1120 -- be an Unchecked_Union.
1122 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
1124 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
1126 Error_Msg_N ("component subtype subject to per-object" &
1127 " constraint must be an Unchecked_Union", Comp);
1131 if Is_Controlled (Typ) then
1133 ("component of unchecked union cannot be controlled", Comp);
1135 elsif Has_Task (Typ) then
1137 ("component of unchecked union cannot have tasks", Comp);
1141 end Check_Component;
1143 ----------------------------------
1144 -- Check_Duplicated_Export_Name --
1145 ----------------------------------
1147 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
1148 String_Val : constant String_Id := Strval (Nam);
1151 -- We are only interested in the export case, and in the case of
1152 -- generics, it is the instance, not the template, that is the
1153 -- problem (the template will generate a warning in any case).
1155 if not Inside_A_Generic
1156 and then (Prag_Id = Pragma_Export
1158 Prag_Id = Pragma_Export_Procedure
1160 Prag_Id = Pragma_Export_Valued_Procedure
1162 Prag_Id = Pragma_Export_Function)
1164 for J in Externals.First .. Externals.Last loop
1165 if String_Equal (String_Val, Strval (Externals.Table (J))) then
1166 Error_Msg_Sloc := Sloc (Externals.Table (J));
1167 Error_Msg_N ("external name duplicates name given#", Nam);
1172 Externals.Append (Nam);
1174 end Check_Duplicated_Export_Name;
1176 -------------------------
1177 -- Check_First_Subtype --
1178 -------------------------
1180 procedure Check_First_Subtype (Arg : Node_Id) is
1181 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1183 if not Is_First_Subtype (Entity (Argx)) then
1185 ("pragma% cannot apply to subtype", Argx);
1187 end Check_First_Subtype;
1189 ---------------------------
1190 -- Check_In_Main_Program --
1191 ---------------------------
1193 procedure Check_In_Main_Program is
1194 P : constant Node_Id := Parent (N);
1197 -- Must be at in subprogram body
1199 if Nkind (P) /= N_Subprogram_Body then
1200 Error_Pragma ("% pragma allowed only in subprogram");
1202 -- Otherwise warn if obviously not main program
1204 elsif Present (Parameter_Specifications (Specification (P)))
1205 or else not Is_Compilation_Unit (Defining_Entity (P))
1207 Error_Msg_Name_1 := Pname;
1209 ("?pragma% is only effective in main program", N);
1211 end Check_In_Main_Program;
1213 ---------------------------------------
1214 -- Check_Interrupt_Or_Attach_Handler --
1215 ---------------------------------------
1217 procedure Check_Interrupt_Or_Attach_Handler is
1218 Arg1_X : constant Node_Id := Expression (Arg1);
1219 Handler_Proc, Proc_Scope : Entity_Id;
1224 if Prag_Id = Pragma_Interrupt_Handler then
1225 Check_Restriction (No_Dynamic_Attachment, N);
1228 Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
1229 Proc_Scope := Scope (Handler_Proc);
1231 -- On AAMP only, a pragma Interrupt_Handler is supported for
1232 -- nonprotected parameterless procedures.
1234 if not AAMP_On_Target
1235 or else Prag_Id = Pragma_Attach_Handler
1237 if Ekind (Proc_Scope) /= E_Protected_Type then
1239 ("argument of pragma% must be protected procedure", Arg1);
1242 if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
1243 Error_Pragma ("pragma% must be in protected definition");
1247 if not Is_Library_Level_Entity (Proc_Scope)
1248 or else (AAMP_On_Target
1249 and then not Is_Library_Level_Entity (Handler_Proc))
1252 ("argument for pragma% must be library level entity", Arg1);
1254 end Check_Interrupt_Or_Attach_Handler;
1256 -------------------------------------------
1257 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1258 -------------------------------------------
1260 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1269 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1272 elsif Nkind (P) = N_Package_Specification then
1275 elsif Nkind (P) = N_Block_Statement then
1278 -- Note: the following tests seem a little peculiar, because
1279 -- they test for bodies, but if we were in the statement part
1280 -- of the body, we would already have hit the handled statement
1281 -- sequence, so the only way we get here is by being in the
1282 -- declarative part of the body.
1284 elsif Nkind_In (P, N_Subprogram_Body,
1295 Error_Pragma ("pragma% is not in declarative part or package spec");
1296 end Check_Is_In_Decl_Part_Or_Package_Spec;
1298 -------------------------
1299 -- Check_No_Identifier --
1300 -------------------------
1302 procedure Check_No_Identifier (Arg : Node_Id) is
1304 if Chars (Arg) /= No_Name then
1305 Error_Pragma_Arg_Ident
1306 ("pragma% does not permit identifier& here", Arg);
1308 end Check_No_Identifier;
1310 --------------------------
1311 -- Check_No_Identifiers --
1312 --------------------------
1314 procedure Check_No_Identifiers is
1317 if Arg_Count > 0 then
1319 while Present (Arg_Node) loop
1320 Check_No_Identifier (Arg_Node);
1324 end Check_No_Identifiers;
1326 -------------------------------
1327 -- Check_Optional_Identifier --
1328 -------------------------------
1330 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1332 if Present (Arg) and then Chars (Arg) /= No_Name then
1333 if Chars (Arg) /= Id then
1334 Error_Msg_Name_1 := Pname;
1335 Error_Msg_Name_2 := Id;
1336 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1340 end Check_Optional_Identifier;
1342 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1344 Name_Buffer (1 .. Id'Length) := Id;
1345 Name_Len := Id'Length;
1346 Check_Optional_Identifier (Arg, Name_Find);
1347 end Check_Optional_Identifier;
1349 --------------------------------------
1350 -- Check_Precondition_Postcondition --
1351 --------------------------------------
1353 procedure Check_Precondition_Postcondition (In_Body : out Boolean) is
1357 procedure Chain_PPC (PO : Node_Id);
1358 -- If PO is a subprogram declaration node (or a generic subprogram
1359 -- declaration node), then the precondition/postcondition applies
1360 -- to this subprogram and the processing for the pragma is completed.
1361 -- Otherwise the pragma is misplaced.
1367 procedure Chain_PPC (PO : Node_Id) is
1371 if not Nkind_In (PO, N_Subprogram_Declaration,
1372 N_Generic_Subprogram_Declaration)
1377 -- Here if we have subprogram or generic subprogram declaration
1379 S := Defining_Unit_Name (Specification (PO));
1381 -- Analyze the pragma unless it appears within a package spec,
1382 -- which is the case where we delay the analysis of the PPC until
1383 -- the end of the package declarations (for details, see
1384 -- Analyze_Package_Specification.Analyze_PPCs).
1386 if not Is_Package_Or_Generic_Package (Scope (S)) then
1387 Analyze_PPC_In_Decl_Part (N, S);
1390 -- Chain spec PPC pragma to list for subprogram
1392 Set_Next_Pragma (N, Spec_PPC_List (S));
1393 Set_Spec_PPC_List (S, N);
1395 -- Return indicating spec case
1401 -- Start of processing for Check_Precondition_Postcondition
1404 if not Is_List_Member (N) then
1408 -- Record whether pragma is enabled
1410 Set_PPC_Enabled (N, Check_Enabled (Pname));
1412 -- If we are within an inlined body, the legality of the pragma
1413 -- has been checked already.
1415 if In_Inlined_Body then
1420 -- Search prior declarations
1423 while Present (Prev (P)) loop
1426 -- If the previous node is a generic subprogram, do not go to
1427 -- to the original node, which is the unanalyzed tree: we need
1428 -- to attach the pre/postconditions to the analyzed version
1429 -- at this point. They get propagated to the original tree when
1430 -- analyzing the corresponding body.
1432 if Nkind (P) not in N_Generic_Declaration then
1433 PO := Original_Node (P);
1438 -- Skip past prior pragma
1440 if Nkind (PO) = N_Pragma then
1443 -- Skip stuff not coming from source
1445 elsif not Comes_From_Source (PO) then
1448 -- Only remaining possibility is subprogram declaration
1456 -- If we fall through loop, pragma is at start of list, so see if
1457 -- it is at the start of declarations of a subprogram body.
1459 if Nkind (Parent (N)) = N_Subprogram_Body
1460 and then List_Containing (N) = Declarations (Parent (N))
1462 if Operating_Mode /= Generate_Code then
1464 -- Analyze expression in pragma, for correctness
1465 -- and for ASIS use.
1467 Preanalyze_Spec_Expression
1468 (Get_Pragma_Arg (Arg1), Standard_Boolean);
1474 -- See if it is in the pragmas after a library level subprogram
1476 elsif Nkind (Parent (N)) = N_Compilation_Unit_Aux then
1477 Chain_PPC (Unit (Parent (Parent (N))));
1481 -- If we fall through, pragma was misplaced
1484 end Check_Precondition_Postcondition;
1486 -----------------------------
1487 -- Check_Static_Constraint --
1488 -----------------------------
1490 -- Note: for convenience in writing this procedure, in addition to
1491 -- the officially (i.e. by spec) allowed argument which is always
1492 -- a constraint, it also allows ranges and discriminant associations.
1493 -- Above is not clear ???
1495 procedure Check_Static_Constraint (Constr : Node_Id) is
1497 procedure Require_Static (E : Node_Id);
1498 -- Require given expression to be static expression
1500 --------------------
1501 -- Require_Static --
1502 --------------------
1504 procedure Require_Static (E : Node_Id) is
1506 if not Is_OK_Static_Expression (E) then
1507 Flag_Non_Static_Expr
1508 ("non-static constraint not allowed in Unchecked_Union!", E);
1513 -- Start of processing for Check_Static_Constraint
1516 case Nkind (Constr) is
1517 when N_Discriminant_Association =>
1518 Require_Static (Expression (Constr));
1521 Require_Static (Low_Bound (Constr));
1522 Require_Static (High_Bound (Constr));
1524 when N_Attribute_Reference =>
1525 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1526 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1528 when N_Range_Constraint =>
1529 Check_Static_Constraint (Range_Expression (Constr));
1531 when N_Index_Or_Discriminant_Constraint =>
1535 IDC := First (Constraints (Constr));
1536 while Present (IDC) loop
1537 Check_Static_Constraint (IDC);
1545 end Check_Static_Constraint;
1547 --------------------------------------
1548 -- Check_Valid_Configuration_Pragma --
1549 --------------------------------------
1551 -- A configuration pragma must appear in the context clause of a
1552 -- compilation unit, and only other pragmas may precede it. Note that
1553 -- the test also allows use in a configuration pragma file.
1555 procedure Check_Valid_Configuration_Pragma is
1557 if not Is_Configuration_Pragma then
1558 Error_Pragma ("incorrect placement for configuration pragma%");
1560 end Check_Valid_Configuration_Pragma;
1562 -------------------------------------
1563 -- Check_Valid_Library_Unit_Pragma --
1564 -------------------------------------
1566 procedure Check_Valid_Library_Unit_Pragma is
1568 Parent_Node : Node_Id;
1569 Unit_Name : Entity_Id;
1570 Unit_Kind : Node_Kind;
1571 Unit_Node : Node_Id;
1572 Sindex : Source_File_Index;
1575 if not Is_List_Member (N) then
1579 Plist := List_Containing (N);
1580 Parent_Node := Parent (Plist);
1582 if Parent_Node = Empty then
1585 -- Case of pragma appearing after a compilation unit. In this
1586 -- case it must have an argument with the corresponding name
1587 -- and must be part of the following pragmas of its parent.
1589 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1590 if Plist /= Pragmas_After (Parent_Node) then
1593 elsif Arg_Count = 0 then
1595 ("argument required if outside compilation unit");
1598 Check_No_Identifiers;
1599 Check_Arg_Count (1);
1600 Unit_Node := Unit (Parent (Parent_Node));
1601 Unit_Kind := Nkind (Unit_Node);
1603 Analyze (Expression (Arg1));
1605 if Unit_Kind = N_Generic_Subprogram_Declaration
1606 or else Unit_Kind = N_Subprogram_Declaration
1608 Unit_Name := Defining_Entity (Unit_Node);
1610 elsif Unit_Kind in N_Generic_Instantiation then
1611 Unit_Name := Defining_Entity (Unit_Node);
1614 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1617 if Chars (Unit_Name) /=
1618 Chars (Entity (Expression (Arg1)))
1621 ("pragma% argument is not current unit name", Arg1);
1624 if Ekind (Unit_Name) = E_Package
1625 and then Present (Renamed_Entity (Unit_Name))
1627 Error_Pragma ("pragma% not allowed for renamed package");
1631 -- Pragma appears other than after a compilation unit
1634 -- Here we check for the generic instantiation case and also
1635 -- for the case of processing a generic formal package. We
1636 -- detect these cases by noting that the Sloc on the node
1637 -- does not belong to the current compilation unit.
1639 Sindex := Source_Index (Current_Sem_Unit);
1641 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1642 Rewrite (N, Make_Null_Statement (Loc));
1645 -- If before first declaration, the pragma applies to the
1646 -- enclosing unit, and the name if present must be this name.
1648 elsif Is_Before_First_Decl (N, Plist) then
1649 Unit_Node := Unit_Declaration_Node (Current_Scope);
1650 Unit_Kind := Nkind (Unit_Node);
1652 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1655 elsif Unit_Kind = N_Subprogram_Body
1656 and then not Acts_As_Spec (Unit_Node)
1660 elsif Nkind (Parent_Node) = N_Package_Body then
1663 elsif Nkind (Parent_Node) = N_Package_Specification
1664 and then Plist = Private_Declarations (Parent_Node)
1668 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1669 or else Nkind (Parent_Node) =
1670 N_Generic_Subprogram_Declaration)
1671 and then Plist = Generic_Formal_Declarations (Parent_Node)
1675 elsif Arg_Count > 0 then
1676 Analyze (Expression (Arg1));
1678 if Entity (Expression (Arg1)) /= Current_Scope then
1680 ("name in pragma% must be enclosing unit", Arg1);
1683 -- It is legal to have no argument in this context
1689 -- Error if not before first declaration. This is because a
1690 -- library unit pragma argument must be the name of a library
1691 -- unit (RM 10.1.5(7)), but the only names permitted in this
1692 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1693 -- generic subprogram declarations or generic instantiations.
1697 ("pragma% misplaced, must be before first declaration");
1701 end Check_Valid_Library_Unit_Pragma;
1707 procedure Check_Variant (Variant : Node_Id) is
1708 Clist : constant Node_Id := Component_List (Variant);
1712 if not Is_Non_Empty_List (Component_Items (Clist)) then
1714 ("Unchecked_Union may not have empty component list",
1719 Comp := First (Component_Items (Clist));
1720 while Present (Comp) loop
1721 Check_Component (Comp);
1730 procedure Error_Pragma (Msg : String) is
1732 Error_Msg_Name_1 := Pname;
1733 Error_Msg_N (Msg, N);
1737 ----------------------
1738 -- Error_Pragma_Arg --
1739 ----------------------
1741 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1743 Error_Msg_Name_1 := Pname;
1744 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1746 end Error_Pragma_Arg;
1748 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1750 Error_Msg_Name_1 := Pname;
1751 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1752 Error_Pragma_Arg (Msg2, Arg);
1753 end Error_Pragma_Arg;
1755 ----------------------------
1756 -- Error_Pragma_Arg_Ident --
1757 ----------------------------
1759 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1761 Error_Msg_Name_1 := Pname;
1762 Error_Msg_N (Msg, Arg);
1764 end Error_Pragma_Arg_Ident;
1766 ----------------------
1767 -- Error_Pragma_Ref --
1768 ----------------------
1770 procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id) is
1772 Error_Msg_Name_1 := Pname;
1773 Error_Msg_Sloc := Sloc (Ref);
1774 Error_Msg_NE (Msg, N, Ref);
1776 end Error_Pragma_Ref;
1778 ------------------------
1779 -- Find_Lib_Unit_Name --
1780 ------------------------
1782 function Find_Lib_Unit_Name return Entity_Id is
1784 -- Return inner compilation unit entity, for case of nested
1785 -- categorization pragmas. This happens in generic unit.
1787 if Nkind (Parent (N)) = N_Package_Specification
1788 and then Defining_Entity (Parent (N)) /= Current_Scope
1790 return Defining_Entity (Parent (N));
1792 return Current_Scope;
1794 end Find_Lib_Unit_Name;
1796 ----------------------------
1797 -- Find_Program_Unit_Name --
1798 ----------------------------
1800 procedure Find_Program_Unit_Name (Id : Node_Id) is
1801 Unit_Name : Entity_Id;
1802 Unit_Kind : Node_Kind;
1803 P : constant Node_Id := Parent (N);
1806 if Nkind (P) = N_Compilation_Unit then
1807 Unit_Kind := Nkind (Unit (P));
1809 if Unit_Kind = N_Subprogram_Declaration
1810 or else Unit_Kind = N_Package_Declaration
1811 or else Unit_Kind in N_Generic_Declaration
1813 Unit_Name := Defining_Entity (Unit (P));
1815 if Chars (Id) = Chars (Unit_Name) then
1816 Set_Entity (Id, Unit_Name);
1817 Set_Etype (Id, Etype (Unit_Name));
1819 Set_Etype (Id, Any_Type);
1821 ("cannot find program unit referenced by pragma%");
1825 Set_Etype (Id, Any_Type);
1826 Error_Pragma ("pragma% inapplicable to this unit");
1832 end Find_Program_Unit_Name;
1834 -----------------------------------------
1835 -- Find_Unique_Parameterless_Procedure --
1836 -----------------------------------------
1838 function Find_Unique_Parameterless_Procedure
1840 Arg : Node_Id) return Entity_Id
1842 Proc : Entity_Id := Empty;
1845 -- The body of this procedure needs some comments ???
1847 if not Is_Entity_Name (Name) then
1849 ("argument of pragma% must be entity name", Arg);
1851 elsif not Is_Overloaded (Name) then
1852 Proc := Entity (Name);
1854 if Ekind (Proc) /= E_Procedure
1855 or else Present (First_Formal (Proc)) then
1857 ("argument of pragma% must be parameterless procedure", Arg);
1862 Found : Boolean := False;
1864 Index : Interp_Index;
1867 Get_First_Interp (Name, Index, It);
1868 while Present (It.Nam) loop
1871 if Ekind (Proc) = E_Procedure
1872 and then No (First_Formal (Proc))
1876 Set_Entity (Name, Proc);
1877 Set_Is_Overloaded (Name, False);
1880 ("ambiguous handler name for pragma% ", Arg);
1884 Get_Next_Interp (Index, It);
1889 ("argument of pragma% must be parameterless procedure",
1892 Proc := Entity (Name);
1898 end Find_Unique_Parameterless_Procedure;
1900 -------------------------
1901 -- Gather_Associations --
1902 -------------------------
1904 procedure Gather_Associations
1906 Args : out Args_List)
1911 -- Initialize all parameters to Empty
1913 for J in Args'Range loop
1917 -- That's all we have to do if there are no argument associations
1919 if No (Pragma_Argument_Associations (N)) then
1923 -- Otherwise first deal with any positional parameters present
1925 Arg := First (Pragma_Argument_Associations (N));
1926 for Index in Args'Range loop
1927 exit when No (Arg) or else Chars (Arg) /= No_Name;
1928 Args (Index) := Expression (Arg);
1932 -- Positional parameters all processed, if any left, then we
1933 -- have too many positional parameters.
1935 if Present (Arg) and then Chars (Arg) = No_Name then
1937 ("too many positional associations for pragma%", Arg);
1940 -- Process named parameters if any are present
1942 while Present (Arg) loop
1943 if Chars (Arg) = No_Name then
1945 ("positional association cannot follow named association",
1949 for Index in Names'Range loop
1950 if Names (Index) = Chars (Arg) then
1951 if Present (Args (Index)) then
1953 ("duplicate argument association for pragma%", Arg);
1955 Args (Index) := Expression (Arg);
1960 if Index = Names'Last then
1961 Error_Msg_Name_1 := Pname;
1962 Error_Msg_N ("pragma% does not allow & argument", Arg);
1964 -- Check for possible misspelling
1966 for Index1 in Names'Range loop
1967 if Is_Bad_Spelling_Of
1968 (Chars (Arg), Names (Index1))
1970 Error_Msg_Name_1 := Names (Index1);
1971 Error_Msg_N ("\possible misspelling of%", Arg);
1983 end Gather_Associations;
1989 procedure GNAT_Pragma is
1991 Check_Restriction (No_Implementation_Pragmas, N);
1994 --------------------------
1995 -- Is_Before_First_Decl --
1996 --------------------------
1998 function Is_Before_First_Decl
1999 (Pragma_Node : Node_Id;
2000 Decls : List_Id) return Boolean
2002 Item : Node_Id := First (Decls);
2005 -- Only other pragmas can come before this pragma
2008 if No (Item) or else Nkind (Item) /= N_Pragma then
2011 elsif Item = Pragma_Node then
2017 end Is_Before_First_Decl;
2019 -----------------------------
2020 -- Is_Configuration_Pragma --
2021 -----------------------------
2023 -- A configuration pragma must appear in the context clause of a
2024 -- compilation unit, and only other pragmas may precede it. Note that
2025 -- the test below also permits use in a configuration pragma file.
2027 function Is_Configuration_Pragma return Boolean is
2028 Lis : constant List_Id := List_Containing (N);
2029 Par : constant Node_Id := Parent (N);
2033 -- If no parent, then we are in the configuration pragma file,
2034 -- so the placement is definitely appropriate.
2039 -- Otherwise we must be in the context clause of a compilation unit
2040 -- and the only thing allowed before us in the context list is more
2041 -- configuration pragmas.
2043 elsif Nkind (Par) = N_Compilation_Unit
2044 and then Context_Items (Par) = Lis
2051 elsif Nkind (Prg) /= N_Pragma then
2061 end Is_Configuration_Pragma;
2063 --------------------------
2064 -- Is_In_Context_Clause --
2065 --------------------------
2067 function Is_In_Context_Clause return Boolean is
2069 Parent_Node : Node_Id;
2072 if not Is_List_Member (N) then
2076 Plist := List_Containing (N);
2077 Parent_Node := Parent (Plist);
2079 if Parent_Node = Empty
2080 or else Nkind (Parent_Node) /= N_Compilation_Unit
2081 or else Context_Items (Parent_Node) /= Plist
2088 end Is_In_Context_Clause;
2090 ---------------------------------
2091 -- Is_Static_String_Expression --
2092 ---------------------------------
2094 function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
2095 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
2098 Analyze_And_Resolve (Argx);
2099 return Is_OK_Static_Expression (Argx)
2100 and then Nkind (Argx) = N_String_Literal;
2101 end Is_Static_String_Expression;
2103 ----------------------
2104 -- Pragma_Misplaced --
2105 ----------------------
2107 procedure Pragma_Misplaced is
2109 Error_Pragma ("incorrect placement of pragma%");
2110 end Pragma_Misplaced;
2112 ------------------------------------
2113 -- Process Atomic_Shared_Volatile --
2114 ------------------------------------
2116 procedure Process_Atomic_Shared_Volatile is
2123 procedure Set_Atomic (E : Entity_Id);
2124 -- Set given type as atomic, and if no explicit alignment was given,
2125 -- set alignment to unknown, since back end knows what the alignment
2126 -- requirements are for atomic arrays. Note: this step is necessary
2127 -- for derived types.
2133 procedure Set_Atomic (E : Entity_Id) is
2137 if not Has_Alignment_Clause (E) then
2138 Set_Alignment (E, Uint_0);
2142 -- Start of processing for Process_Atomic_Shared_Volatile
2145 Check_Ada_83_Warning;
2146 Check_No_Identifiers;
2147 Check_Arg_Count (1);
2148 Check_Arg_Is_Local_Name (Arg1);
2149 E_Id := Expression (Arg1);
2151 if Etype (E_Id) = Any_Type then
2156 D := Declaration_Node (E);
2160 if Rep_Item_Too_Early (E, N)
2162 Rep_Item_Too_Late (E, N)
2166 Check_First_Subtype (Arg1);
2169 if Prag_Id /= Pragma_Volatile then
2171 Set_Atomic (Underlying_Type (E));
2172 Set_Atomic (Base_Type (E));
2175 -- Attribute belongs on the base type. If the view of the type is
2176 -- currently private, it also belongs on the underlying type.
2178 Set_Is_Volatile (Base_Type (E));
2179 Set_Is_Volatile (Underlying_Type (E));
2181 Set_Treat_As_Volatile (E);
2182 Set_Treat_As_Volatile (Underlying_Type (E));
2184 elsif K = N_Object_Declaration
2185 or else (K = N_Component_Declaration
2186 and then Original_Record_Component (E) = E)
2188 if Rep_Item_Too_Late (E, N) then
2192 if Prag_Id /= Pragma_Volatile then
2195 -- If the object declaration has an explicit initialization, a
2196 -- temporary may have to be created to hold the expression, to
2197 -- ensure that access to the object remain atomic.
2199 if Nkind (Parent (E)) = N_Object_Declaration
2200 and then Present (Expression (Parent (E)))
2202 Set_Has_Delayed_Freeze (E);
2205 -- An interesting improvement here. If an object of type X
2206 -- is declared atomic, and the type X is not atomic, that's
2207 -- a pity, since it may not have appropriate alignment etc.
2208 -- We can rescue this in the special case where the object
2209 -- and type are in the same unit by just setting the type
2210 -- as atomic, so that the back end will process it as atomic.
2212 Utyp := Underlying_Type (Etype (E));
2215 and then Sloc (E) > No_Location
2216 and then Sloc (Utyp) > No_Location
2218 Get_Source_File_Index (Sloc (E)) =
2219 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
2221 Set_Is_Atomic (Underlying_Type (Etype (E)));
2225 Set_Is_Volatile (E);
2226 Set_Treat_As_Volatile (E);
2230 ("inappropriate entity for pragma%", Arg1);
2232 end Process_Atomic_Shared_Volatile;
2234 -------------------------------------------
2235 -- Process_Compile_Time_Warning_Or_Error --
2236 -------------------------------------------
2238 procedure Process_Compile_Time_Warning_Or_Error is
2239 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
2242 Check_Arg_Count (2);
2243 Check_No_Identifiers;
2244 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
2245 Analyze_And_Resolve (Arg1x, Standard_Boolean);
2247 if Compile_Time_Known_Value (Arg1x) then
2248 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
2250 Str : constant String_Id :=
2251 Strval (Get_Pragma_Arg (Arg2));
2252 Len : constant Int := String_Length (Str);
2257 Cent : constant Entity_Id :=
2258 Cunit_Entity (Current_Sem_Unit);
2260 Force : constant Boolean :=
2261 Prag_Id = Pragma_Compile_Time_Warning
2263 Is_Spec_Name (Unit_Name (Current_Sem_Unit))
2264 and then (Ekind (Cent) /= E_Package
2265 or else not In_Private_Part (Cent));
2266 -- Set True if this is the warning case, and we are in the
2267 -- visible part of a package spec, or in a subprogram spec,
2268 -- in which case we want to force the client to see the
2269 -- warning, even though it is not in the main unit.
2272 -- Loop through segments of message separated by line
2273 -- feeds. We output these segments as separate messages
2274 -- with continuation marks for all but the first.
2279 Error_Msg_Strlen := 0;
2281 -- Loop to copy characters from argument to error
2282 -- message string buffer.
2285 exit when Ptr > Len;
2286 CC := Get_String_Char (Str, Ptr);
2289 -- Ignore wide chars ??? else store character
2291 if In_Character_Range (CC) then
2292 C := Get_Character (CC);
2293 exit when C = ASCII.LF;
2294 Error_Msg_Strlen := Error_Msg_Strlen + 1;
2295 Error_Msg_String (Error_Msg_Strlen) := C;
2299 -- Here with one line ready to go
2301 Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning;
2303 -- If this is a warning in a spec, then we want clients
2304 -- to see the warning, so mark the message with the
2305 -- special sequence !! to force the warning. In the case
2306 -- of a package spec, we do not force this if we are in
2307 -- the private part of the spec.
2310 if Cont = False then
2311 Error_Msg_N ("<~!!", Arg1);
2314 Error_Msg_N ("\<~!!", Arg1);
2317 -- Error, rather than warning, or in a body, so we do not
2318 -- need to force visibility for client (error will be
2319 -- output in any case, and this is the situation in which
2320 -- we do not want a client to get a warning, since the
2321 -- warning is in the body or the spec private part.
2324 if Cont = False then
2325 Error_Msg_N ("<~", Arg1);
2328 Error_Msg_N ("\<~", Arg1);
2332 exit when Ptr > Len;
2337 end Process_Compile_Time_Warning_Or_Error;
2339 ------------------------
2340 -- Process_Convention --
2341 ------------------------
2343 procedure Process_Convention
2344 (C : out Convention_Id;
2350 Comp_Unit : Unit_Number_Type;
2352 procedure Set_Convention_From_Pragma (E : Entity_Id);
2353 -- Set convention in entity E, and also flag that the entity has a
2354 -- convention pragma. If entity is for a private or incomplete type,
2355 -- also set convention and flag on underlying type. This procedure
2356 -- also deals with the special case of C_Pass_By_Copy convention.
2358 --------------------------------
2359 -- Set_Convention_From_Pragma --
2360 --------------------------------
2362 procedure Set_Convention_From_Pragma (E : Entity_Id) is
2364 -- Ada 2005 (AI-430): Check invalid attempt to change convention
2365 -- for an overridden dispatching operation. Technically this is
2366 -- an amendment and should only be done in Ada 2005 mode. However,
2367 -- this is clearly a mistake, since the problem that is addressed
2368 -- by this AI is that there is a clear gap in the RM!
2370 if Is_Dispatching_Operation (E)
2371 and then Present (Overridden_Operation (E))
2372 and then C /= Convention (Overridden_Operation (E))
2375 ("cannot change convention for " &
2376 "overridden dispatching operation",
2380 -- Set the convention
2382 Set_Convention (E, C);
2383 Set_Has_Convention_Pragma (E);
2385 if Is_Incomplete_Or_Private_Type (E) then
2386 Set_Convention (Underlying_Type (E), C);
2387 Set_Has_Convention_Pragma (Underlying_Type (E), True);
2390 -- A class-wide type should inherit the convention of
2391 -- the specific root type (although this isn't specified
2392 -- clearly by the RM).
2394 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
2395 Set_Convention (Class_Wide_Type (E), C);
2398 -- If the entity is a record type, then check for special case of
2399 -- C_Pass_By_Copy, which is treated the same as C except that the
2400 -- special record flag is set. This convention is only permitted
2401 -- on record types (see AI95-00131).
2403 if Cname = Name_C_Pass_By_Copy then
2404 if Is_Record_Type (E) then
2405 Set_C_Pass_By_Copy (Base_Type (E));
2406 elsif Is_Incomplete_Or_Private_Type (E)
2407 and then Is_Record_Type (Underlying_Type (E))
2409 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
2412 ("C_Pass_By_Copy convention allowed only for record type",
2417 -- If the entity is a derived boolean type, check for the
2418 -- special case of convention C, C++, or Fortran, where we
2419 -- consider any nonzero value to represent true.
2421 if Is_Discrete_Type (E)
2422 and then Root_Type (Etype (E)) = Standard_Boolean
2428 C = Convention_Fortran)
2430 Set_Nonzero_Is_True (Base_Type (E));
2432 end Set_Convention_From_Pragma;
2434 -- Start of processing for Process_Convention
2437 Check_At_Least_N_Arguments (2);
2438 Check_Optional_Identifier (Arg1, Name_Convention);
2439 Check_Arg_Is_Identifier (Arg1);
2440 Cname := Chars (Expression (Arg1));
2442 -- C_Pass_By_Copy is treated as a synonym for convention C
2443 -- (this is tested again below to set the critical flag)
2445 if Cname = Name_C_Pass_By_Copy then
2448 -- Otherwise we must have something in the standard convention list
2450 elsif Is_Convention_Name (Cname) then
2451 C := Get_Convention_Id (Chars (Expression (Arg1)));
2453 -- In DEC VMS, it seems that there is an undocumented feature that
2454 -- any unrecognized convention is treated as the default, which for
2455 -- us is convention C. It does not seem so terrible to do this
2456 -- unconditionally, silently in the VMS case, and with a warning
2457 -- in the non-VMS case.
2460 if Warn_On_Export_Import and not OpenVMS_On_Target then
2462 ("?unrecognized convention name, C assumed",
2469 Check_Optional_Identifier (Arg2, Name_Entity);
2470 Check_Arg_Is_Local_Name (Arg2);
2472 Id := Expression (Arg2);
2475 if not Is_Entity_Name (Id) then
2476 Error_Pragma_Arg ("entity name required", Arg2);
2481 -- Go to renamed subprogram if present, since convention applies to
2482 -- the actual renamed entity, not to the renaming entity. If the
2483 -- subprogram is inherited, go to parent subprogram.
2485 if Is_Subprogram (E)
2486 and then Present (Alias (E))
2488 if Nkind (Parent (Declaration_Node (E))) =
2489 N_Subprogram_Renaming_Declaration
2491 if Scope (E) /= Scope (Alias (E)) then
2493 ("cannot apply pragma% to non-local entity&#", E);
2498 elsif Nkind_In (Parent (E), N_Full_Type_Declaration,
2499 N_Private_Extension_Declaration)
2500 and then Scope (E) = Scope (Alias (E))
2506 -- Check that we are not applying this to a specless body
2508 if Is_Subprogram (E)
2509 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2512 ("pragma% requires separate spec and must come before body");
2515 -- Check that we are not applying this to a named constant
2517 if Ekind (E) = E_Named_Integer
2519 Ekind (E) = E_Named_Real
2521 Error_Msg_Name_1 := Pname;
2523 ("cannot apply pragma% to named constant!",
2524 Get_Pragma_Arg (Arg2));
2526 ("\supply appropriate type for&!", Arg2);
2529 if Ekind (E) = E_Enumeration_Literal then
2530 Error_Pragma ("enumeration literal not allowed for pragma%");
2533 -- Check for rep item appearing too early or too late
2535 if Etype (E) = Any_Type
2536 or else Rep_Item_Too_Early (E, N)
2540 E := Underlying_Type (E);
2543 if Rep_Item_Too_Late (E, N) then
2547 if Has_Convention_Pragma (E) then
2549 ("at most one Convention/Export/Import pragma is allowed", Arg2);
2551 elsif Convention (E) = Convention_Protected
2552 or else Ekind (Scope (E)) = E_Protected_Type
2555 ("a protected operation cannot be given a different convention",
2559 -- For Intrinsic, a subprogram is required
2561 if C = Convention_Intrinsic
2562 and then not Is_Subprogram (E)
2563 and then not Is_Generic_Subprogram (E)
2566 ("second argument of pragma% must be a subprogram", Arg2);
2569 -- For Stdcall, a subprogram, variable or subprogram type is required
2571 if C = Convention_Stdcall
2572 and then not Is_Subprogram (E)
2573 and then not Is_Generic_Subprogram (E)
2574 and then Ekind (E) /= E_Variable
2577 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2580 ("second argument of pragma% must be subprogram (type)",
2584 if not Is_Subprogram (E)
2585 and then not Is_Generic_Subprogram (E)
2587 Set_Convention_From_Pragma (E);
2591 Check_First_Subtype (Arg2);
2592 Set_Convention_From_Pragma (Base_Type (E));
2594 -- For subprograms, we must set the convention on the
2595 -- internally generated directly designated type as well.
2597 if Ekind (E) = E_Access_Subprogram_Type then
2598 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2602 -- For the subprogram case, set proper convention for all homonyms
2603 -- in same scope and the same declarative part, i.e. the same
2604 -- compilation unit.
2607 Comp_Unit := Get_Source_Unit (E);
2608 Set_Convention_From_Pragma (E);
2610 -- Treat a pragma Import as an implicit body, for GPS use
2612 if Prag_Id = Pragma_Import then
2613 Generate_Reference (E, Id, 'b');
2619 exit when No (E1) or else Scope (E1) /= Current_Scope;
2621 -- Do not set the pragma on inherited operations or on
2622 -- formal subprograms.
2624 if Comes_From_Source (E1)
2625 and then Comp_Unit = Get_Source_Unit (E1)
2626 and then not Is_Formal_Subprogram (E1)
2627 and then Nkind (Original_Node (Parent (E1))) /=
2628 N_Full_Type_Declaration
2630 if Present (Alias (E1))
2631 and then Scope (E1) /= Scope (Alias (E1))
2634 ("cannot apply pragma% to non-local entity& declared#",
2638 Set_Convention_From_Pragma (E1);
2640 if Prag_Id = Pragma_Import then
2641 Generate_Reference (E, Id, 'b');
2646 end Process_Convention;
2648 -----------------------------------------------------
2649 -- Process_Extended_Import_Export_Exception_Pragma --
2650 -----------------------------------------------------
2652 procedure Process_Extended_Import_Export_Exception_Pragma
2653 (Arg_Internal : Node_Id;
2654 Arg_External : Node_Id;
2662 if not OpenVMS_On_Target then
2664 ("?pragma% ignored (applies only to Open'V'M'S)");
2667 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2668 Def_Id := Entity (Arg_Internal);
2670 if Ekind (Def_Id) /= E_Exception then
2672 ("pragma% must refer to declared exception", Arg_Internal);
2675 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2677 if Present (Arg_Form) then
2678 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2681 if Present (Arg_Form)
2682 and then Chars (Arg_Form) = Name_Ada
2686 Set_Is_VMS_Exception (Def_Id);
2687 Set_Exception_Code (Def_Id, No_Uint);
2690 if Present (Arg_Code) then
2691 if not Is_VMS_Exception (Def_Id) then
2693 ("Code option for pragma% not allowed for Ada case",
2697 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2698 Code_Val := Expr_Value (Arg_Code);
2700 if not UI_Is_In_Int_Range (Code_Val) then
2702 ("Code option for pragma% must be in 32-bit range",
2706 Set_Exception_Code (Def_Id, Code_Val);
2709 end Process_Extended_Import_Export_Exception_Pragma;
2711 -------------------------------------------------
2712 -- Process_Extended_Import_Export_Internal_Arg --
2713 -------------------------------------------------
2715 procedure Process_Extended_Import_Export_Internal_Arg
2716 (Arg_Internal : Node_Id := Empty)
2719 if No (Arg_Internal) then
2720 Error_Pragma ("Internal parameter required for pragma%");
2723 if Nkind (Arg_Internal) = N_Identifier then
2726 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2727 and then (Prag_Id = Pragma_Import_Function
2729 Prag_Id = Pragma_Export_Function)
2735 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2738 Check_Arg_Is_Local_Name (Arg_Internal);
2739 end Process_Extended_Import_Export_Internal_Arg;
2741 --------------------------------------------------
2742 -- Process_Extended_Import_Export_Object_Pragma --
2743 --------------------------------------------------
2745 procedure Process_Extended_Import_Export_Object_Pragma
2746 (Arg_Internal : Node_Id;
2747 Arg_External : Node_Id;
2753 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2754 Def_Id := Entity (Arg_Internal);
2756 if Ekind (Def_Id) /= E_Constant
2757 and then Ekind (Def_Id) /= E_Variable
2760 ("pragma% must designate an object", Arg_Internal);
2763 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2765 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2768 ("previous Common/Psect_Object applies, pragma % not permitted",
2772 if Rep_Item_Too_Late (Def_Id, N) then
2776 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2778 if Present (Arg_Size) then
2779 Check_Arg_Is_External_Name (Arg_Size);
2782 -- Export_Object case
2784 if Prag_Id = Pragma_Export_Object then
2785 if not Is_Library_Level_Entity (Def_Id) then
2787 ("argument for pragma% must be library level entity",
2791 if Ekind (Current_Scope) = E_Generic_Package then
2792 Error_Pragma ("pragma& cannot appear in a generic unit");
2795 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2797 ("exported object must have compile time known size",
2801 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2803 ("?duplicate Export_Object pragma", N);
2805 Set_Exported (Def_Id, Arg_Internal);
2808 -- Import_Object case
2811 if Is_Concurrent_Type (Etype (Def_Id)) then
2813 ("cannot use pragma% for task/protected object",
2817 if Ekind (Def_Id) = E_Constant then
2819 ("cannot import a constant", Arg_Internal);
2822 if Warn_On_Export_Import
2823 and then Has_Discriminants (Etype (Def_Id))
2826 ("imported value must be initialized?", Arg_Internal);
2829 if Warn_On_Export_Import
2830 and then Is_Access_Type (Etype (Def_Id))
2833 ("cannot import object of an access type?", Arg_Internal);
2836 if Warn_On_Export_Import
2837 and then Is_Imported (Def_Id)
2840 ("?duplicate Import_Object pragma", N);
2842 -- Check for explicit initialization present. Note that an
2843 -- initialization that generated by the code generator, e.g.
2844 -- for an access type, does not count here.
2846 elsif Present (Expression (Parent (Def_Id)))
2849 (Original_Node (Expression (Parent (Def_Id))))
2851 Error_Msg_Sloc := Sloc (Def_Id);
2853 ("imported entities cannot be initialized (RM B.1(24))",
2854 "\no initialization allowed for & declared#", Arg1);
2856 Set_Imported (Def_Id);
2857 Note_Possible_Modification (Arg_Internal, Sure => False);
2860 end Process_Extended_Import_Export_Object_Pragma;
2862 ------------------------------------------------------
2863 -- Process_Extended_Import_Export_Subprogram_Pragma --
2864 ------------------------------------------------------
2866 procedure Process_Extended_Import_Export_Subprogram_Pragma
2867 (Arg_Internal : Node_Id;
2868 Arg_External : Node_Id;
2869 Arg_Parameter_Types : Node_Id;
2870 Arg_Result_Type : Node_Id := Empty;
2871 Arg_Mechanism : Node_Id;
2872 Arg_Result_Mechanism : Node_Id := Empty;
2873 Arg_First_Optional_Parameter : Node_Id := Empty)
2879 Ambiguous : Boolean;
2883 function Same_Base_Type
2885 Formal : Entity_Id) return Boolean;
2886 -- Determines if Ptype references the type of Formal. Note that
2887 -- only the base types need to match according to the spec. Ptype
2888 -- here is the argument from the pragma, which is either a type
2889 -- name, or an access attribute.
2891 --------------------
2892 -- Same_Base_Type --
2893 --------------------
2895 function Same_Base_Type
2897 Formal : Entity_Id) return Boolean
2899 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2903 -- Case where pragma argument is typ'Access
2905 if Nkind (Ptype) = N_Attribute_Reference
2906 and then Attribute_Name (Ptype) = Name_Access
2908 Pref := Prefix (Ptype);
2911 if not Is_Entity_Name (Pref)
2912 or else Entity (Pref) = Any_Type
2917 -- We have a match if the corresponding argument is of an
2918 -- anonymous access type, and its designated type matches
2919 -- the type of the prefix of the access attribute
2921 return Ekind (Ftyp) = E_Anonymous_Access_Type
2922 and then Base_Type (Entity (Pref)) =
2923 Base_Type (Etype (Designated_Type (Ftyp)));
2925 -- Case where pragma argument is a type name
2930 if not Is_Entity_Name (Ptype)
2931 or else Entity (Ptype) = Any_Type
2936 -- We have a match if the corresponding argument is of
2937 -- the type given in the pragma (comparing base types)
2939 return Base_Type (Entity (Ptype)) = Ftyp;
2943 -- Start of processing for
2944 -- Process_Extended_Import_Export_Subprogram_Pragma
2947 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2951 -- Loop through homonyms (overloadings) of the entity
2953 Hom_Id := Entity (Arg_Internal);
2954 while Present (Hom_Id) loop
2955 Def_Id := Get_Base_Subprogram (Hom_Id);
2957 -- We need a subprogram in the current scope
2959 if not Is_Subprogram (Def_Id)
2960 or else Scope (Def_Id) /= Current_Scope
2967 -- Pragma cannot apply to subprogram body
2969 if Is_Subprogram (Def_Id)
2970 and then Nkind (Parent (Declaration_Node (Def_Id))) =
2974 ("pragma% requires separate spec"
2975 & " and must come before body");
2978 -- Test result type if given, note that the result type
2979 -- parameter can only be present for the function cases.
2981 if Present (Arg_Result_Type)
2982 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2986 elsif Etype (Def_Id) /= Standard_Void_Type
2988 (Pname = Name_Export_Procedure
2990 Pname = Name_Import_Procedure)
2994 -- Test parameter types if given. Note that this parameter
2995 -- has not been analyzed (and must not be, since it is
2996 -- semantic nonsense), so we get it as the parser left it.
2998 elsif Present (Arg_Parameter_Types) then
2999 Check_Matching_Types : declare
3004 Formal := First_Formal (Def_Id);
3006 if Nkind (Arg_Parameter_Types) = N_Null then
3007 if Present (Formal) then
3011 -- A list of one type, e.g. (List) is parsed as
3012 -- a parenthesized expression.
3014 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
3015 and then Paren_Count (Arg_Parameter_Types) = 1
3018 or else Present (Next_Formal (Formal))
3023 Same_Base_Type (Arg_Parameter_Types, Formal);
3026 -- A list of more than one type is parsed as a aggregate
3028 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
3029 and then Paren_Count (Arg_Parameter_Types) = 0
3031 Ptype := First (Expressions (Arg_Parameter_Types));
3032 while Present (Ptype) or else Present (Formal) loop
3035 or else not Same_Base_Type (Ptype, Formal)
3040 Next_Formal (Formal);
3045 -- Anything else is of the wrong form
3049 ("wrong form for Parameter_Types parameter",
3050 Arg_Parameter_Types);
3052 end Check_Matching_Types;
3055 -- Match is now False if the entry we found did not match
3056 -- either a supplied Parameter_Types or Result_Types argument
3062 -- Ambiguous case, the flag Ambiguous shows if we already
3063 -- detected this and output the initial messages.
3066 if not Ambiguous then
3068 Error_Msg_Name_1 := Pname;
3070 ("pragma% does not uniquely identify subprogram!",
3072 Error_Msg_Sloc := Sloc (Ent);
3073 Error_Msg_N ("matching subprogram #!", N);
3077 Error_Msg_Sloc := Sloc (Def_Id);
3078 Error_Msg_N ("matching subprogram #!", N);
3083 Hom_Id := Homonym (Hom_Id);
3086 -- See if we found an entry
3089 if not Ambiguous then
3090 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
3092 ("pragma% cannot be given for generic subprogram");
3095 ("pragma% does not identify local subprogram");
3102 -- Import pragmas must be for imported entities
3104 if Prag_Id = Pragma_Import_Function
3106 Prag_Id = Pragma_Import_Procedure
3108 Prag_Id = Pragma_Import_Valued_Procedure
3110 if not Is_Imported (Ent) then
3112 ("pragma Import or Interface must precede pragma%");
3115 -- Here we have the Export case which can set the entity as exported
3117 -- But does not do so if the specified external name is null, since
3118 -- that is taken as a signal in DEC Ada 83 (with which we want to be
3119 -- compatible) to request no external name.
3121 elsif Nkind (Arg_External) = N_String_Literal
3122 and then String_Length (Strval (Arg_External)) = 0
3126 -- In all other cases, set entity as exported
3129 Set_Exported (Ent, Arg_Internal);
3132 -- Special processing for Valued_Procedure cases
3134 if Prag_Id = Pragma_Import_Valued_Procedure
3136 Prag_Id = Pragma_Export_Valued_Procedure
3138 Formal := First_Formal (Ent);
3142 ("at least one parameter required for pragma%");
3144 elsif Ekind (Formal) /= E_Out_Parameter then
3146 ("first parameter must have mode out for pragma%");
3149 Set_Is_Valued_Procedure (Ent);
3153 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
3155 -- Process Result_Mechanism argument if present. We have already
3156 -- checked that this is only allowed for the function case.
3158 if Present (Arg_Result_Mechanism) then
3159 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
3162 -- Process Mechanism parameter if present. Note that this parameter
3163 -- is not analyzed, and must not be analyzed since it is semantic
3164 -- nonsense, so we get it in exactly as the parser left it.
3166 if Present (Arg_Mechanism) then
3174 -- A single mechanism association without a formal parameter
3175 -- name is parsed as a parenthesized expression. All other
3176 -- cases are parsed as aggregates, so we rewrite the single
3177 -- parameter case as an aggregate for consistency.
3179 if Nkind (Arg_Mechanism) /= N_Aggregate
3180 and then Paren_Count (Arg_Mechanism) = 1
3182 Rewrite (Arg_Mechanism,
3183 Make_Aggregate (Sloc (Arg_Mechanism),
3184 Expressions => New_List (
3185 Relocate_Node (Arg_Mechanism))));
3188 -- Case of only mechanism name given, applies to all formals
3190 if Nkind (Arg_Mechanism) /= N_Aggregate then
3191 Formal := First_Formal (Ent);
3192 while Present (Formal) loop
3193 Set_Mechanism_Value (Formal, Arg_Mechanism);
3194 Next_Formal (Formal);
3197 -- Case of list of mechanism associations given
3200 if Null_Record_Present (Arg_Mechanism) then
3202 ("inappropriate form for Mechanism parameter",
3206 -- Deal with positional ones first
3208 Formal := First_Formal (Ent);
3210 if Present (Expressions (Arg_Mechanism)) then
3211 Mname := First (Expressions (Arg_Mechanism));
3212 while Present (Mname) loop
3215 ("too many mechanism associations", Mname);
3218 Set_Mechanism_Value (Formal, Mname);
3219 Next_Formal (Formal);
3224 -- Deal with named entries
3226 if Present (Component_Associations (Arg_Mechanism)) then
3227 Massoc := First (Component_Associations (Arg_Mechanism));
3228 while Present (Massoc) loop
3229 Choice := First (Choices (Massoc));
3231 if Nkind (Choice) /= N_Identifier
3232 or else Present (Next (Choice))
3235 ("incorrect form for mechanism association",
3239 Formal := First_Formal (Ent);
3243 ("parameter name & not present", Choice);
3246 if Chars (Choice) = Chars (Formal) then
3248 (Formal, Expression (Massoc));
3250 -- Set entity on identifier for ASIS
3252 Set_Entity (Choice, Formal);
3257 Next_Formal (Formal);
3267 -- Process First_Optional_Parameter argument if present. We have
3268 -- already checked that this is only allowed for the Import case.
3270 if Present (Arg_First_Optional_Parameter) then
3271 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
3273 ("first optional parameter must be formal parameter name",
3274 Arg_First_Optional_Parameter);
3277 Formal := First_Formal (Ent);
3281 ("specified formal parameter& not found",
3282 Arg_First_Optional_Parameter);
3285 exit when Chars (Formal) =
3286 Chars (Arg_First_Optional_Parameter);
3288 Next_Formal (Formal);
3291 Set_First_Optional_Parameter (Ent, Formal);
3293 -- Check specified and all remaining formals have right form
3295 while Present (Formal) loop
3296 if Ekind (Formal) /= E_In_Parameter then
3298 ("optional formal& is not of mode in!",
3299 Arg_First_Optional_Parameter, Formal);
3302 Dval := Default_Value (Formal);
3306 ("optional formal& does not have default value!",
3307 Arg_First_Optional_Parameter, Formal);
3309 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
3314 ("default value for optional formal& is non-static!",
3315 Arg_First_Optional_Parameter, Formal);
3319 Set_Is_Optional_Parameter (Formal);
3320 Next_Formal (Formal);
3323 end Process_Extended_Import_Export_Subprogram_Pragma;
3325 --------------------------
3326 -- Process_Generic_List --
3327 --------------------------
3329 procedure Process_Generic_List is
3334 Check_No_Identifiers;
3335 Check_At_Least_N_Arguments (1);
3338 while Present (Arg) loop
3339 Exp := Expression (Arg);
3342 if not Is_Entity_Name (Exp)
3344 (not Is_Generic_Instance (Entity (Exp))
3346 not Is_Generic_Unit (Entity (Exp)))
3349 ("pragma% argument must be name of generic unit/instance",
3355 end Process_Generic_List;
3357 ---------------------------------
3358 -- Process_Import_Or_Interface --
3359 ---------------------------------
3361 procedure Process_Import_Or_Interface is
3367 Process_Convention (C, Def_Id);
3368 Kill_Size_Check_Code (Def_Id);
3369 Note_Possible_Modification (Expression (Arg2), Sure => False);
3371 if Ekind (Def_Id) = E_Variable
3373 Ekind (Def_Id) = E_Constant
3375 -- We do not permit Import to apply to a renaming declaration
3377 if Present (Renamed_Object (Def_Id)) then
3379 ("pragma% not allowed for object renaming", Arg2);
3381 -- User initialization is not allowed for imported object, but
3382 -- the object declaration may contain a default initialization,
3383 -- that will be discarded. Note that an explicit initialization
3384 -- only counts if it comes from source, otherwise it is simply
3385 -- the code generator making an implicit initialization explicit.
3387 elsif Present (Expression (Parent (Def_Id)))
3388 and then Comes_From_Source (Expression (Parent (Def_Id)))
3390 Error_Msg_Sloc := Sloc (Def_Id);
3392 ("no initialization allowed for declaration of& #",
3393 "\imported entities cannot be initialized (RM B.1(24))",
3397 Set_Imported (Def_Id);
3398 Process_Interface_Name (Def_Id, Arg3, Arg4);
3400 -- Note that we do not set Is_Public here. That's because we
3401 -- only want to set it if there is no address clause, and we
3402 -- don't know that yet, so we delay that processing till
3405 -- pragma Import completes deferred constants
3407 if Ekind (Def_Id) = E_Constant then
3408 Set_Has_Completion (Def_Id);
3411 -- It is not possible to import a constant of an unconstrained
3412 -- array type (e.g. string) because there is no simple way to
3413 -- write a meaningful subtype for it.
3415 if Is_Array_Type (Etype (Def_Id))
3416 and then not Is_Constrained (Etype (Def_Id))
3419 ("imported constant& must have a constrained subtype",
3424 elsif Is_Subprogram (Def_Id)
3425 or else Is_Generic_Subprogram (Def_Id)
3427 -- If the name is overloaded, pragma applies to all of the
3428 -- denoted entities in the same declarative part.
3431 while Present (Hom_Id) loop
3432 Def_Id := Get_Base_Subprogram (Hom_Id);
3434 -- Ignore inherited subprograms because the pragma will
3435 -- apply to the parent operation, which is the one called.
3437 if Is_Overloadable (Def_Id)
3438 and then Present (Alias (Def_Id))
3442 -- If it is not a subprogram, it must be in an outer
3443 -- scope and pragma does not apply.
3445 elsif not Is_Subprogram (Def_Id)
3446 and then not Is_Generic_Subprogram (Def_Id)
3450 -- Verify that the homonym is in the same declarative
3451 -- part (not just the same scope).
3453 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
3454 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
3459 Set_Imported (Def_Id);
3461 -- Special processing for Convention_Intrinsic
3463 if C = Convention_Intrinsic then
3465 -- Link_Name argument not allowed for intrinsic
3468 and then Chars (Arg3) = Name_Link_Name
3473 if Present (Arg4) then
3475 ("Link_Name argument not allowed for " &
3480 Set_Is_Intrinsic_Subprogram (Def_Id);
3482 -- If no external name is present, then check that
3483 -- this is a valid intrinsic subprogram. If an external
3484 -- name is present, then this is handled by the back end.
3487 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
3491 -- All interfaced procedures need an external symbol
3492 -- created for them since they are always referenced
3493 -- from another object file.
3495 Set_Is_Public (Def_Id);
3497 -- Verify that the subprogram does not have a completion
3498 -- through a renaming declaration. For other completions
3499 -- the pragma appears as a too late representation.
3502 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3506 and then Nkind (Decl) = N_Subprogram_Declaration
3507 and then Present (Corresponding_Body (Decl))
3508 and then Nkind (Unit_Declaration_Node
3509 (Corresponding_Body (Decl))) =
3510 N_Subprogram_Renaming_Declaration
3512 Error_Msg_Sloc := Sloc (Def_Id);
3514 ("cannot import&, renaming already provided for " &
3515 "declaration #", N, Def_Id);
3519 Set_Has_Completion (Def_Id);
3520 Process_Interface_Name (Def_Id, Arg3, Arg4);
3523 if Is_Compilation_Unit (Hom_Id) then
3525 -- Its possible homonyms are not affected by the pragma.
3526 -- Such homonyms might be present in the context of other
3527 -- units being compiled.
3532 Hom_Id := Homonym (Hom_Id);
3536 -- When the convention is Java or CIL, we also allow Import to be
3537 -- given for packages, generic packages, exceptions, and record
3540 elsif (C = Convention_Java or else C = Convention_CIL)
3542 (Is_Package_Or_Generic_Package (Def_Id)
3543 or else Ekind (Def_Id) = E_Exception
3544 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3546 Set_Imported (Def_Id);
3547 Set_Is_Public (Def_Id);
3548 Process_Interface_Name (Def_Id, Arg3, Arg4);
3550 -- Import a CPP class
3552 elsif Is_Record_Type (Def_Id)
3553 and then C = Convention_CPP
3555 if not Is_Tagged_Type (Def_Id) then
3556 Error_Msg_Sloc := Sloc (Def_Id);
3557 Error_Pragma_Arg ("imported 'C'P'P type must be tagged", Arg2);
3560 -- Types treated as CPP classes are treated as limited, but we
3561 -- don't require them to be declared this way. A warning is
3562 -- issued to encourage the user to declare them as limited.
3563 -- This is not an error, for compatibility reasons, because
3564 -- these types have been supported this way for some time.
3566 if not Is_Limited_Type (Def_Id) then
3568 ("imported 'C'P'P type should be " &
3569 "explicitly declared limited?",
3570 Get_Pragma_Arg (Arg2));
3572 ("\type will be considered limited",
3573 Get_Pragma_Arg (Arg2));
3576 Set_Is_CPP_Class (Def_Id);
3577 Set_Is_Limited_Record (Def_Id);
3582 ("second argument of pragma% must be object or subprogram",
3586 -- If this pragma applies to a compilation unit, then the unit,
3587 -- which is a subprogram, does not require (or allow) a body.
3588 -- We also do not need to elaborate imported procedures.
3590 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3592 Cunit : constant Node_Id := Parent (Parent (N));
3594 Set_Body_Required (Cunit, False);
3597 end Process_Import_Or_Interface;
3599 --------------------
3600 -- Process_Inline --
3601 --------------------
3603 procedure Process_Inline (Active : Boolean) is
3609 Effective : Boolean := False;
3611 procedure Make_Inline (Subp : Entity_Id);
3612 -- Subp is the defining unit name of the subprogram
3613 -- declaration. Set the flag, as well as the flag in the
3614 -- corresponding body, if there is one present.
3616 procedure Set_Inline_Flags (Subp : Entity_Id);
3617 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp and also
3618 -- Has_Pragma_Inline_Always for the Inline_Always case.
3620 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3621 -- Returns True if it can be determined at this stage that inlining
3622 -- is not possible, for example if the body is available and contains
3623 -- exception handlers, we prevent inlining, since otherwise we can
3624 -- get undefined symbols at link time. This function also emits a
3625 -- warning if front-end inlining is enabled and the pragma appears
3628 -- ??? is business with link symbols still valid, or does it relate
3629 -- to front end ZCX which is being phased out ???
3631 ---------------------------
3632 -- Inlining_Not_Possible --
3633 ---------------------------
3635 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3636 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3640 if Nkind (Decl) = N_Subprogram_Body then
3641 Stats := Handled_Statement_Sequence (Decl);
3642 return Present (Exception_Handlers (Stats))
3643 or else Present (At_End_Proc (Stats));
3645 elsif Nkind (Decl) = N_Subprogram_Declaration
3646 and then Present (Corresponding_Body (Decl))
3648 if Front_End_Inlining
3649 and then Analyzed (Corresponding_Body (Decl))
3651 Error_Msg_N ("pragma appears too late, ignored?", N);
3654 -- If the subprogram is a renaming as body, the body is
3655 -- just a call to the renamed subprogram, and inlining is
3656 -- trivially possible.
3659 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
3660 N_Subprogram_Renaming_Declaration
3666 Handled_Statement_Sequence
3667 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3670 Present (Exception_Handlers (Stats))
3671 or else Present (At_End_Proc (Stats));
3675 -- If body is not available, assume the best, the check is
3676 -- performed again when compiling enclosing package bodies.
3680 end Inlining_Not_Possible;
3686 procedure Make_Inline (Subp : Entity_Id) is
3687 Kind : constant Entity_Kind := Ekind (Subp);
3688 Inner_Subp : Entity_Id := Subp;
3691 -- Ignore if bad type, avoid cascaded error
3693 if Etype (Subp) = Any_Type then
3697 -- Ignore if all inlining is suppressed
3699 elsif Suppress_All_Inlining then
3703 -- If inlining is not possible, for now do not treat as an error
3705 elsif Inlining_Not_Possible (Subp) then
3709 -- Here we have a candidate for inlining, but we must exclude
3710 -- derived operations. Otherwise we would end up trying to inline
3711 -- a phantom declaration, and the result would be to drag in a
3712 -- body which has no direct inlining associated with it. That
3713 -- would not only be inefficient but would also result in the
3714 -- backend doing cross-unit inlining in cases where it was
3715 -- definitely inappropriate to do so.
3717 -- However, a simple Comes_From_Source test is insufficient, since
3718 -- we do want to allow inlining of generic instances which also do
3719 -- not come from source. We also need to recognize specs
3720 -- generated by the front-end for bodies that carry the pragma.
3721 -- Finally, predefined operators do not come from source but are
3722 -- not inlineable either.
3724 elsif Is_Generic_Instance (Subp)
3725 or else Nkind (Parent (Parent (Subp))) = N_Subprogram_Declaration
3729 elsif not Comes_From_Source (Subp)
3730 and then Scope (Subp) /= Standard_Standard
3736 -- The referenced entity must either be the enclosing entity,
3737 -- or an entity declared within the current open scope.
3739 if Present (Scope (Subp))
3740 and then Scope (Subp) /= Current_Scope
3741 and then Subp /= Current_Scope
3744 ("argument of% must be entity in current scope", Assoc);
3748 -- Processing for procedure, operator or function.
3749 -- If subprogram is aliased (as for an instance) indicate
3750 -- that the renamed entity (if declared in the same unit)
3753 if Is_Subprogram (Subp) then
3754 while Present (Alias (Inner_Subp)) loop
3755 Inner_Subp := Alias (Inner_Subp);
3758 if In_Same_Source_Unit (Subp, Inner_Subp) then
3759 Set_Inline_Flags (Inner_Subp);
3761 Decl := Parent (Parent (Inner_Subp));
3763 if Nkind (Decl) = N_Subprogram_Declaration
3764 and then Present (Corresponding_Body (Decl))
3766 Set_Inline_Flags (Corresponding_Body (Decl));
3768 elsif Is_Generic_Instance (Subp) then
3770 -- Indicate that the body needs to be created for
3771 -- inlining subsequent calls. The instantiation
3772 -- node follows the declaration of the wrapper
3773 -- package created for it.
3775 if Scope (Subp) /= Standard_Standard
3777 Need_Subprogram_Instance_Body
3778 (Next (Unit_Declaration_Node (Scope (Alias (Subp)))),
3788 -- For a generic subprogram set flag as well, for use at
3789 -- the point of instantiation, to determine whether the
3790 -- body should be generated.
3792 elsif Is_Generic_Subprogram (Subp) then
3793 Set_Inline_Flags (Subp);
3796 -- Literals are by definition inlined
3798 elsif Kind = E_Enumeration_Literal then
3801 -- Anything else is an error
3805 ("expect subprogram name for pragma%", Assoc);
3809 ----------------------
3810 -- Set_Inline_Flags --
3811 ----------------------
3813 procedure Set_Inline_Flags (Subp : Entity_Id) is
3816 Set_Is_Inlined (Subp, True);
3819 if not Has_Pragma_Inline (Subp) then
3820 Set_Has_Pragma_Inline (Subp);
3824 if Prag_Id = Pragma_Inline_Always then
3825 Set_Has_Pragma_Inline_Always (Subp);
3827 end Set_Inline_Flags;
3829 -- Start of processing for Process_Inline
3832 Check_No_Identifiers;
3833 Check_At_Least_N_Arguments (1);
3836 Inline_Processing_Required := True;
3840 while Present (Assoc) loop
3841 Subp_Id := Expression (Assoc);
3845 if Is_Entity_Name (Subp_Id) then
3846 Subp := Entity (Subp_Id);
3848 if Subp = Any_Id then
3850 -- If previous error, avoid cascaded errors
3858 while Present (Homonym (Subp))
3859 and then Scope (Homonym (Subp)) = Current_Scope
3861 Make_Inline (Homonym (Subp));
3862 Subp := Homonym (Subp);
3869 ("inappropriate argument for pragma%", Assoc);
3872 and then Warn_On_Redundant_Constructs
3873 and then not Suppress_All_Inlining
3875 if Inlining_Not_Possible (Subp) then
3877 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
3880 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
3888 ----------------------------
3889 -- Process_Interface_Name --
3890 ----------------------------
3892 procedure Process_Interface_Name
3893 (Subprogram_Def : Entity_Id;
3899 String_Val : String_Id;
3901 procedure Check_Form_Of_Interface_Name
3903 Ext_Name_Case : Boolean);
3904 -- SN is a string literal node for an interface name. This routine
3905 -- performs some minimal checks that the name is reasonable. In
3906 -- particular that no spaces or other obviously incorrect characters
3907 -- appear. This is only a warning, since any characters are allowed.
3908 -- Ext_Name_Case is True for an External_Name, False for a Link_Name.
3910 ----------------------------------
3911 -- Check_Form_Of_Interface_Name --
3912 ----------------------------------
3914 procedure Check_Form_Of_Interface_Name
3916 Ext_Name_Case : Boolean)
3918 S : constant String_Id := Strval (Expr_Value_S (SN));
3919 SL : constant Nat := String_Length (S);
3924 Error_Msg_N ("interface name cannot be null string", SN);
3927 for J in 1 .. SL loop
3928 C := Get_String_Char (S, J);
3930 -- Look for dubious character and issue unconditional warning.
3931 -- Definitely dubious if not in character range.
3933 if not In_Character_Range (C)
3935 -- For all cases except external names on CLI target,
3936 -- commas, spaces and slashes are dubious (in CLI, we use
3937 -- spaces and commas in external names to specify assembly
3938 -- version and public key).
3940 or else ((not Ext_Name_Case or else VM_Target /= CLI_Target)
3941 and then (Get_Character (C) = ' '
3943 Get_Character (C) = ','
3945 Get_Character (C) = '/'
3947 Get_Character (C) = '\'))
3950 ("?interface name contains illegal character",
3951 Sloc (SN) + Source_Ptr (J));
3954 end Check_Form_Of_Interface_Name;
3956 -- Start of processing for Process_Interface_Name
3959 if No (Link_Arg) then
3960 if No (Ext_Arg) then
3961 if VM_Target = CLI_Target
3962 and then Ekind (Subprogram_Def) = E_Package
3963 and then Nkind (Parent (Subprogram_Def)) =
3964 N_Package_Specification
3965 and then Present (Generic_Parent (Parent (Subprogram_Def)))
3970 (Generic_Parent (Parent (Subprogram_Def))));
3975 elsif Chars (Ext_Arg) = Name_Link_Name then
3977 Link_Nam := Expression (Ext_Arg);
3980 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3981 Ext_Nam := Expression (Ext_Arg);
3986 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3987 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3988 Ext_Nam := Expression (Ext_Arg);
3989 Link_Nam := Expression (Link_Arg);
3992 -- Check expressions for external name and link name are static
3994 if Present (Ext_Nam) then
3995 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3996 Check_Form_Of_Interface_Name (Ext_Nam, Ext_Name_Case => True);
3998 -- Verify that external name is not the name of a local entity,
3999 -- which would hide the imported one and could lead to run-time
4000 -- surprises. The problem can only arise for entities declared in
4001 -- a package body (otherwise the external name is fully qualified
4002 -- and will not conflict).
4010 if Prag_Id = Pragma_Import then
4011 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
4013 E := Entity_Id (Get_Name_Table_Info (Nam));
4015 if Nam /= Chars (Subprogram_Def)
4016 and then Present (E)
4017 and then not Is_Overloadable (E)
4018 and then Is_Immediately_Visible (E)
4019 and then not Is_Imported (E)
4020 and then Ekind (Scope (E)) = E_Package
4023 while Present (Par) loop
4024 if Nkind (Par) = N_Package_Body then
4025 Error_Msg_Sloc := Sloc (E);
4027 ("imported entity is hidden by & declared#",
4032 Par := Parent (Par);
4039 if Present (Link_Nam) then
4040 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
4041 Check_Form_Of_Interface_Name (Link_Nam, Ext_Name_Case => False);
4044 -- If there is no link name, just set the external name
4046 if No (Link_Nam) then
4047 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
4049 -- For the Link_Name case, the given literal is preceded by an
4050 -- asterisk, which indicates to GCC that the given name should
4051 -- be taken literally, and in particular that no prepending of
4052 -- underlines should occur, even in systems where this is the
4058 if VM_Target = No_VM then
4059 Store_String_Char (Get_Char_Code ('*'));
4062 String_Val := Strval (Expr_Value_S (Link_Nam));
4063 Store_String_Chars (String_Val);
4065 Make_String_Literal (Sloc (Link_Nam),
4066 Strval => End_String);
4069 Set_Encoded_Interface_Name
4070 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
4071 Check_Duplicated_Export_Name (Link_Nam);
4072 end Process_Interface_Name;
4074 -----------------------------------------
4075 -- Process_Interrupt_Or_Attach_Handler --
4076 -----------------------------------------
4078 procedure Process_Interrupt_Or_Attach_Handler is
4079 Arg1_X : constant Node_Id := Expression (Arg1);
4080 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
4081 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
4084 Set_Is_Interrupt_Handler (Handler_Proc);
4086 -- If the pragma is not associated with a handler procedure
4087 -- within a protected type, then it must be for a nonprotected
4088 -- procedure for the AAMP target, in which case we don't
4089 -- associate a representation item with the procedure's scope.
4091 if Ekind (Proc_Scope) = E_Protected_Type then
4092 if Prag_Id = Pragma_Interrupt_Handler
4094 Prag_Id = Pragma_Attach_Handler
4096 Record_Rep_Item (Proc_Scope, N);
4099 end Process_Interrupt_Or_Attach_Handler;
4101 --------------------------------------------------
4102 -- Process_Restrictions_Or_Restriction_Warnings --
4103 --------------------------------------------------
4105 -- Note: some of the simple identifier cases were handled in par-prag,
4106 -- but it is harmless (and more straightforward) to simply handle all
4107 -- cases here, even if it means we repeat a bit of work in some cases.
4109 procedure Process_Restrictions_Or_Restriction_Warnings
4113 R_Id : Restriction_Id;
4118 procedure Check_Unit_Name (N : Node_Id);
4119 -- Checks unit name parameter for No_Dependence. Returns if it has
4120 -- an appropriate form, otherwise raises pragma argument error.
4122 ---------------------
4123 -- Check_Unit_Name --
4124 ---------------------
4126 procedure Check_Unit_Name (N : Node_Id) is
4128 if Nkind (N) = N_Selected_Component then
4129 Check_Unit_Name (Prefix (N));
4130 Check_Unit_Name (Selector_Name (N));
4132 elsif Nkind (N) = N_Identifier then
4137 ("wrong form for unit name for No_Dependence", N);
4139 end Check_Unit_Name;
4141 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
4144 Check_Ada_83_Warning;
4145 Check_At_Least_N_Arguments (1);
4146 Check_Valid_Configuration_Pragma;
4149 while Present (Arg) loop
4151 Expr := Expression (Arg);
4153 -- Case of no restriction identifier present
4155 if Id = No_Name then
4156 if Nkind (Expr) /= N_Identifier then
4158 ("invalid form for restriction", Arg);
4163 (Process_Restriction_Synonyms (Expr));
4165 if R_Id not in All_Boolean_Restrictions then
4166 Error_Msg_Name_1 := Pname;
4168 ("invalid restriction identifier&", Get_Pragma_Arg (Arg));
4170 -- Check for possible misspelling
4172 for J in Restriction_Id loop
4174 Rnm : constant String := Restriction_Id'Image (J);
4177 Name_Buffer (1 .. Rnm'Length) := Rnm;
4178 Name_Len := Rnm'Length;
4179 Set_Casing (All_Lower_Case);
4181 if Is_Bad_Spelling_Of (Chars (Expr), Name_Enter) then
4183 (Identifier_Casing (Current_Source_File));
4184 Error_Msg_String (1 .. Rnm'Length) :=
4185 Name_Buffer (1 .. Name_Len);
4186 Error_Msg_Strlen := Rnm'Length;
4188 ("\possible misspelling of ""~""",
4189 Get_Pragma_Arg (Arg));
4198 if Implementation_Restriction (R_Id) then
4199 Check_Restriction (No_Implementation_Restrictions, Arg);
4202 -- If this is a warning, then set the warning unless we already
4203 -- have a real restriction active (we never want a warning to
4204 -- override a real restriction).
4207 if not Restriction_Active (R_Id) then
4208 Set_Restriction (R_Id, N);
4209 Restriction_Warnings (R_Id) := True;
4212 -- If real restriction case, then set it and make sure that the
4213 -- restriction warning flag is off, since a real restriction
4214 -- always overrides a warning.
4217 Set_Restriction (R_Id, N);
4218 Restriction_Warnings (R_Id) := False;
4221 -- A very special case that must be processed here: pragma
4222 -- Restrictions (No_Exceptions) turns off all run-time
4223 -- checking. This is a bit dubious in terms of the formal
4224 -- language definition, but it is what is intended by RM
4225 -- H.4(12). Restriction_Warnings never affects generated code
4226 -- so this is done only in the real restriction case.
4228 if R_Id = No_Exceptions and then not Warn then
4229 Scope_Suppress := (others => True);
4232 -- Case of No_Dependence => unit-name. Note that the parser
4233 -- already made the necessary entry in the No_Dependence table.
4235 elsif Id = Name_No_Dependence then
4236 Check_Unit_Name (Expr);
4238 -- All other cases of restriction identifier present
4241 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
4242 Analyze_And_Resolve (Expr, Any_Integer);
4244 if R_Id not in All_Parameter_Restrictions then
4246 ("invalid restriction parameter identifier", Arg);
4248 elsif not Is_OK_Static_Expression (Expr) then
4249 Flag_Non_Static_Expr
4250 ("value must be static expression!", Expr);
4253 elsif not Is_Integer_Type (Etype (Expr))
4254 or else Expr_Value (Expr) < 0
4257 ("value must be non-negative integer", Arg);
4260 -- Restriction pragma is active
4262 Val := Expr_Value (Expr);
4264 if not UI_Is_In_Int_Range (Val) then
4266 ("pragma ignored, value too large?", Arg);
4269 -- Warning case. If the real restriction is active, then we
4270 -- ignore the request, since warning never overrides a real
4271 -- restriction. Otherwise we set the proper warning. Note that
4272 -- this circuit sets the warning again if it is already set,
4273 -- which is what we want, since the constant may have changed.
4276 if not Restriction_Active (R_Id) then
4278 (R_Id, N, Integer (UI_To_Int (Val)));
4279 Restriction_Warnings (R_Id) := True;
4282 -- Real restriction case, set restriction and make sure warning
4283 -- flag is off since real restriction always overrides warning.
4286 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
4287 Restriction_Warnings (R_Id) := False;
4293 end Process_Restrictions_Or_Restriction_Warnings;
4295 ---------------------------------
4296 -- Process_Suppress_Unsuppress --
4297 ---------------------------------
4299 -- Note: this procedure makes entries in the check suppress data
4300 -- structures managed by Sem. See spec of package Sem for full
4301 -- details on how we handle recording of check suppression.
4303 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
4308 In_Package_Spec : constant Boolean :=
4309 Is_Package_Or_Generic_Package (Current_Scope)
4310 and then not In_Package_Body (Current_Scope);
4312 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
4313 -- Used to suppress a single check on the given entity
4315 --------------------------------
4316 -- Suppress_Unsuppress_Echeck --
4317 --------------------------------
4319 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
4321 Set_Checks_May_Be_Suppressed (E);
4323 if In_Package_Spec then
4324 Push_Global_Suppress_Stack_Entry
4327 Suppress => Suppress_Case);
4330 Push_Local_Suppress_Stack_Entry
4333 Suppress => Suppress_Case);
4336 -- If this is a first subtype, and the base type is distinct,
4337 -- then also set the suppress flags on the base type.
4339 if Is_First_Subtype (E)
4340 and then Etype (E) /= E
4342 Suppress_Unsuppress_Echeck (Etype (E), C);
4344 end Suppress_Unsuppress_Echeck;
4346 -- Start of processing for Process_Suppress_Unsuppress
4349 -- Suppress/Unsuppress can appear as a configuration pragma,
4350 -- or in a declarative part or a package spec (RM 11.5(5))
4352 if not Is_Configuration_Pragma then
4353 Check_Is_In_Decl_Part_Or_Package_Spec;
4356 Check_At_Least_N_Arguments (1);
4357 Check_At_Most_N_Arguments (2);
4358 Check_No_Identifier (Arg1);
4359 Check_Arg_Is_Identifier (Arg1);
4361 C := Get_Check_Id (Chars (Expression (Arg1)));
4363 if C = No_Check_Id then
4365 ("argument of pragma% is not valid check name", Arg1);
4368 if not Suppress_Case
4369 and then (C = All_Checks or else C = Overflow_Check)
4371 Opt.Overflow_Checks_Unsuppressed := True;
4374 if Arg_Count = 1 then
4376 -- Make an entry in the local scope suppress table. This is the
4377 -- table that directly shows the current value of the scope
4378 -- suppress check for any check id value.
4380 if C = All_Checks then
4382 -- For All_Checks, we set all specific predefined checks with
4383 -- the exception of Elaboration_Check, which is handled
4384 -- specially because of not wanting All_Checks to have the
4385 -- effect of deactivating static elaboration order processing.
4387 for J in Scope_Suppress'Range loop
4388 if J /= Elaboration_Check then
4389 Scope_Suppress (J) := Suppress_Case;
4393 -- If not All_Checks, and predefined check, then set appropriate
4394 -- scope entry. Note that we will set Elaboration_Check if this
4395 -- is explicitly specified.
4397 elsif C in Predefined_Check_Id then
4398 Scope_Suppress (C) := Suppress_Case;
4401 -- Also make an entry in the Local_Entity_Suppress table
4403 Push_Local_Suppress_Stack_Entry
4406 Suppress => Suppress_Case);
4408 -- Case of two arguments present, where the check is suppressed for
4409 -- a specified entity (given as the second argument of the pragma)
4412 Check_Optional_Identifier (Arg2, Name_On);
4413 E_Id := Expression (Arg2);
4416 if not Is_Entity_Name (E_Id) then
4418 ("second argument of pragma% must be entity name", Arg2);
4427 -- Enforce RM 11.5(7) which requires that for a pragma that
4428 -- appears within a package spec, the named entity must be
4429 -- within the package spec. We allow the package name itself
4430 -- to be mentioned since that makes sense, although it is not
4431 -- strictly allowed by 11.5(7).
4434 and then E /= Current_Scope
4435 and then Scope (E) /= Current_Scope
4438 ("entity in pragma% is not in package spec (RM 11.5(7))",
4442 -- Loop through homonyms. As noted below, in the case of a package
4443 -- spec, only homonyms within the package spec are considered.
4446 Suppress_Unsuppress_Echeck (E, C);
4448 if Is_Generic_Instance (E)
4449 and then Is_Subprogram (E)
4450 and then Present (Alias (E))
4452 Suppress_Unsuppress_Echeck (Alias (E), C);
4455 -- Move to next homonym
4460 -- If we are within a package specification, the
4461 -- pragma only applies to homonyms in the same scope.
4463 exit when In_Package_Spec
4464 and then Scope (E) /= Current_Scope;
4467 end Process_Suppress_Unsuppress;
4473 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
4475 if Is_Imported (E) then
4477 ("cannot export entity& that was previously imported", Arg);
4479 elsif Present (Address_Clause (E)) then
4481 ("cannot export entity& that has an address clause", Arg);
4484 Set_Is_Exported (E);
4486 -- Generate a reference for entity explicitly, because the
4487 -- identifier may be overloaded and name resolution will not
4490 Generate_Reference (E, Arg);
4492 -- Deal with exporting non-library level entity
4494 if not Is_Library_Level_Entity (E) then
4496 -- Not allowed at all for subprograms
4498 if Is_Subprogram (E) then
4499 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
4501 -- Otherwise set public and statically allocated
4505 Set_Is_Statically_Allocated (E);
4507 -- Warn if the corresponding W flag is set and the pragma
4508 -- comes from source. The latter may not be true e.g. on
4509 -- VMS where we expand export pragmas for exception codes
4510 -- associated with imported or exported exceptions. We do
4511 -- not want to generate a warning for something that the
4512 -- user did not write.
4514 if Warn_On_Export_Import
4515 and then Comes_From_Source (Arg)
4518 ("?& has been made static as a result of Export", Arg, E);
4520 ("\this usage is non-standard and non-portable", Arg);
4525 if Warn_On_Export_Import and then Is_Type (E) then
4527 ("exporting a type has no effect?", Arg, E);
4530 if Warn_On_Export_Import and Inside_A_Generic then
4532 ("all instances of& will have the same external name?", Arg, E);
4536 ----------------------------------------------
4537 -- Set_Extended_Import_Export_External_Name --
4538 ----------------------------------------------
4540 procedure Set_Extended_Import_Export_External_Name
4541 (Internal_Ent : Entity_Id;
4542 Arg_External : Node_Id)
4544 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
4548 if No (Arg_External) then
4552 Check_Arg_Is_External_Name (Arg_External);
4554 if Nkind (Arg_External) = N_String_Literal then
4555 if String_Length (Strval (Arg_External)) = 0 then
4558 New_Name := Adjust_External_Name_Case (Arg_External);
4561 elsif Nkind (Arg_External) = N_Identifier then
4562 New_Name := Get_Default_External_Name (Arg_External);
4564 -- Check_Arg_Is_External_Name should let through only
4565 -- identifiers and string literals or static string
4566 -- expressions (which are folded to string literals).
4569 raise Program_Error;
4572 -- If we already have an external name set (by a prior normal
4573 -- Import or Export pragma), then the external names must match
4575 if Present (Interface_Name (Internal_Ent)) then
4576 Check_Matching_Internal_Names : declare
4577 S1 : constant String_Id := Strval (Old_Name);
4578 S2 : constant String_Id := Strval (New_Name);
4581 -- Called if names do not match
4587 procedure Mismatch is
4589 Error_Msg_Sloc := Sloc (Old_Name);
4591 ("external name does not match that given #",
4595 -- Start of processing for Check_Matching_Internal_Names
4598 if String_Length (S1) /= String_Length (S2) then
4602 for J in 1 .. String_Length (S1) loop
4603 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
4608 end Check_Matching_Internal_Names;
4610 -- Otherwise set the given name
4613 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
4614 Check_Duplicated_Export_Name (New_Name);
4616 end Set_Extended_Import_Export_External_Name;
4622 procedure Set_Imported (E : Entity_Id) is
4624 -- Error message if already imported or exported
4626 if Is_Exported (E) or else Is_Imported (E) then
4627 if Is_Exported (E) then
4628 Error_Msg_NE ("entity& was previously exported", N, E);
4630 Error_Msg_NE ("entity& was previously imported", N, E);
4633 Error_Msg_Name_1 := Pname;
4635 ("\(pragma% applies to all previous entities)", N);
4637 Error_Msg_Sloc := Sloc (E);
4638 Error_Msg_NE ("\import not allowed for& declared#", N, E);
4640 -- Here if not previously imported or exported, OK to import
4643 Set_Is_Imported (E);
4645 -- If the entity is an object that is not at the library
4646 -- level, then it is statically allocated. We do not worry
4647 -- about objects with address clauses in this context since
4648 -- they are not really imported in the linker sense.
4651 and then not Is_Library_Level_Entity (E)
4652 and then No (Address_Clause (E))
4654 Set_Is_Statically_Allocated (E);
4659 -------------------------
4660 -- Set_Mechanism_Value --
4661 -------------------------
4663 -- Note: the mechanism name has not been analyzed (and cannot indeed
4664 -- be analyzed, since it is semantic nonsense), so we get it in the
4665 -- exact form created by the parser.
4667 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
4670 Mech_Name_Id : Name_Id;
4672 procedure Bad_Class;
4673 -- Signal bad descriptor class name
4675 procedure Bad_Mechanism;
4676 -- Signal bad mechanism name
4682 procedure Bad_Class is
4684 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
4687 -------------------------
4688 -- Bad_Mechanism_Value --
4689 -------------------------
4691 procedure Bad_Mechanism is
4693 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
4696 -- Start of processing for Set_Mechanism_Value
4699 if Mechanism (Ent) /= Default_Mechanism then
4701 ("mechanism for & has already been set", Mech_Name, Ent);
4704 -- MECHANISM_NAME ::= value | reference | descriptor |
4707 if Nkind (Mech_Name) = N_Identifier then
4708 if Chars (Mech_Name) = Name_Value then
4709 Set_Mechanism (Ent, By_Copy);
4712 elsif Chars (Mech_Name) = Name_Reference then
4713 Set_Mechanism (Ent, By_Reference);
4716 elsif Chars (Mech_Name) = Name_Descriptor then
4717 Check_VMS (Mech_Name);
4718 Set_Mechanism (Ent, By_Descriptor);
4721 elsif Chars (Mech_Name) = Name_Short_Descriptor then
4722 Check_VMS (Mech_Name);
4723 Set_Mechanism (Ent, By_Short_Descriptor);
4726 elsif Chars (Mech_Name) = Name_Copy then
4728 ("bad mechanism name, Value assumed", Mech_Name);
4734 -- MECHANISM_NAME ::= descriptor (CLASS_NAME) |
4735 -- short_descriptor (CLASS_NAME)
4736 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4738 -- Note: this form is parsed as an indexed component
4740 elsif Nkind (Mech_Name) = N_Indexed_Component then
4742 Class := First (Expressions (Mech_Name));
4744 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4745 or else not (Chars (Prefix (Mech_Name)) = Name_Descriptor or else
4746 Chars (Prefix (Mech_Name)) = Name_Short_Descriptor)
4747 or else Present (Next (Class))
4751 Mech_Name_Id := Chars (Prefix (Mech_Name));
4754 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME) |
4755 -- short_descriptor (Class => CLASS_NAME)
4756 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4758 -- Note: this form is parsed as a function call
4760 elsif Nkind (Mech_Name) = N_Function_Call then
4762 Param := First (Parameter_Associations (Mech_Name));
4764 if Nkind (Name (Mech_Name)) /= N_Identifier
4765 or else not (Chars (Name (Mech_Name)) = Name_Descriptor or else
4766 Chars (Name (Mech_Name)) = Name_Short_Descriptor)
4767 or else Present (Next (Param))
4768 or else No (Selector_Name (Param))
4769 or else Chars (Selector_Name (Param)) /= Name_Class
4773 Class := Explicit_Actual_Parameter (Param);
4774 Mech_Name_Id := Chars (Name (Mech_Name));
4781 -- Fall through here with Class set to descriptor class name
4783 Check_VMS (Mech_Name);
4785 if Nkind (Class) /= N_Identifier then
4788 elsif Mech_Name_Id = Name_Descriptor
4789 and then Chars (Class) = Name_UBS
4791 Set_Mechanism (Ent, By_Descriptor_UBS);
4793 elsif Mech_Name_Id = Name_Descriptor
4794 and then Chars (Class) = Name_UBSB
4796 Set_Mechanism (Ent, By_Descriptor_UBSB);
4798 elsif Mech_Name_Id = Name_Descriptor
4799 and then Chars (Class) = Name_UBA
4801 Set_Mechanism (Ent, By_Descriptor_UBA);
4803 elsif Mech_Name_Id = Name_Descriptor
4804 and then Chars (Class) = Name_S
4806 Set_Mechanism (Ent, By_Descriptor_S);
4808 elsif Mech_Name_Id = Name_Descriptor
4809 and then Chars (Class) = Name_SB
4811 Set_Mechanism (Ent, By_Descriptor_SB);
4813 elsif Mech_Name_Id = Name_Descriptor
4814 and then Chars (Class) = Name_A
4816 Set_Mechanism (Ent, By_Descriptor_A);
4818 elsif Mech_Name_Id = Name_Descriptor
4819 and then Chars (Class) = Name_NCA
4821 Set_Mechanism (Ent, By_Descriptor_NCA);
4823 elsif Mech_Name_Id = Name_Short_Descriptor
4824 and then Chars (Class) = Name_UBS
4826 Set_Mechanism (Ent, By_Short_Descriptor_UBS);
4828 elsif Mech_Name_Id = Name_Short_Descriptor
4829 and then Chars (Class) = Name_UBSB
4831 Set_Mechanism (Ent, By_Short_Descriptor_UBSB);
4833 elsif Mech_Name_Id = Name_Short_Descriptor
4834 and then Chars (Class) = Name_UBA
4836 Set_Mechanism (Ent, By_Short_Descriptor_UBA);
4838 elsif Mech_Name_Id = Name_Short_Descriptor
4839 and then Chars (Class) = Name_S
4841 Set_Mechanism (Ent, By_Short_Descriptor_S);
4843 elsif Mech_Name_Id = Name_Short_Descriptor
4844 and then Chars (Class) = Name_SB
4846 Set_Mechanism (Ent, By_Short_Descriptor_SB);
4848 elsif Mech_Name_Id = Name_Short_Descriptor
4849 and then Chars (Class) = Name_A
4851 Set_Mechanism (Ent, By_Short_Descriptor_A);
4853 elsif Mech_Name_Id = Name_Short_Descriptor
4854 and then Chars (Class) = Name_NCA
4856 Set_Mechanism (Ent, By_Short_Descriptor_NCA);
4861 end Set_Mechanism_Value;
4863 ---------------------------
4864 -- Set_Ravenscar_Profile --
4865 ---------------------------
4867 -- The tasks to be done here are
4869 -- Set required policies
4871 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4872 -- pragma Locking_Policy (Ceiling_Locking)
4874 -- Set Detect_Blocking mode
4876 -- Set required restrictions (see System.Rident for detailed list)
4878 procedure Set_Ravenscar_Profile (N : Node_Id) is
4880 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4882 if Task_Dispatching_Policy /= ' '
4883 and then Task_Dispatching_Policy /= 'F'
4885 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
4886 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4888 -- Set the FIFO_Within_Priorities policy, but always preserve
4889 -- System_Location since we like the error message with the run time
4893 Task_Dispatching_Policy := 'F';
4895 if Task_Dispatching_Policy_Sloc /= System_Location then
4896 Task_Dispatching_Policy_Sloc := Loc;
4900 -- pragma Locking_Policy (Ceiling_Locking)
4902 if Locking_Policy /= ' '
4903 and then Locking_Policy /= 'C'
4905 Error_Msg_Sloc := Locking_Policy_Sloc;
4906 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4908 -- Set the Ceiling_Locking policy, but preserve System_Location since
4909 -- we like the error message with the run time name.
4912 Locking_Policy := 'C';
4914 if Locking_Policy_Sloc /= System_Location then
4915 Locking_Policy_Sloc := Loc;
4919 -- pragma Detect_Blocking
4921 Detect_Blocking := True;
4923 -- Set the corresponding restrictions
4925 Set_Profile_Restrictions
4926 (Ravenscar, N, Warn => Treat_Restrictions_As_Warnings);
4927 end Set_Ravenscar_Profile;
4929 -- Start of processing for Analyze_Pragma
4932 -- Deal with unrecognized pragma
4934 if not Is_Pragma_Name (Pname) then
4935 if Warn_On_Unrecognized_Pragma then
4936 Error_Msg_Name_1 := Pname;
4937 Error_Msg_N ("?unrecognized pragma%!", Pragma_Identifier (N));
4939 for PN in First_Pragma_Name .. Last_Pragma_Name loop
4940 if Is_Bad_Spelling_Of (Pname, PN) then
4941 Error_Msg_Name_1 := PN;
4943 ("\?possible misspelling of %!", Pragma_Identifier (N));
4952 -- Here to start processing for recognized pragma
4954 Prag_Id := Get_Pragma_Id (Pname);
4963 if Present (Pragma_Argument_Associations (N)) then
4964 Arg1 := First (Pragma_Argument_Associations (N));
4966 if Present (Arg1) then
4967 Arg2 := Next (Arg1);
4969 if Present (Arg2) then
4970 Arg3 := Next (Arg2);
4972 if Present (Arg3) then
4973 Arg4 := Next (Arg3);
4979 -- Count number of arguments
4986 while Present (Arg_Node) loop
4987 Arg_Count := Arg_Count + 1;
4992 -- An enumeration type defines the pragmas that are supported by the
4993 -- implementation. Get_Pragma_Id (in package Prag) transforms a name
4994 -- into the corresponding enumeration value for the following case.
5002 -- pragma Abort_Defer;
5004 when Pragma_Abort_Defer =>
5006 Check_Arg_Count (0);
5008 -- The only required semantic processing is to check the
5009 -- placement. This pragma must appear at the start of the
5010 -- statement sequence of a handled sequence of statements.
5012 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
5013 or else N /= First (Statements (Parent (N)))
5024 -- Note: this pragma also has some specific processing in Par.Prag
5025 -- because we want to set the Ada version mode during parsing.
5027 when Pragma_Ada_83 =>
5029 Check_Arg_Count (0);
5031 -- We really should check unconditionally for proper configuration
5032 -- pragma placement, since we really don't want mixed Ada modes
5033 -- within a single unit, and the GNAT reference manual has always
5034 -- said this was a configuration pragma, but we did not check and
5035 -- are hesitant to add the check now.
5037 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
5038 -- or Ada 95, so we must check if we are in Ada 2005 mode.
5040 if Ada_Version >= Ada_05 then
5041 Check_Valid_Configuration_Pragma;
5044 -- Now set Ada 83 mode
5046 Ada_Version := Ada_83;
5047 Ada_Version_Explicit := Ada_Version;
5055 -- Note: this pragma also has some specific processing in Par.Prag
5056 -- because we want to set the Ada 83 version mode during parsing.
5058 when Pragma_Ada_95 =>
5060 Check_Arg_Count (0);
5062 -- We really should check unconditionally for proper configuration
5063 -- pragma placement, since we really don't want mixed Ada modes
5064 -- within a single unit, and the GNAT reference manual has always
5065 -- said this was a configuration pragma, but we did not check and
5066 -- are hesitant to add the check now.
5068 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
5069 -- or Ada 95, so we must check if we are in Ada 2005 mode.
5071 if Ada_Version >= Ada_05 then
5072 Check_Valid_Configuration_Pragma;
5075 -- Now set Ada 95 mode
5077 Ada_Version := Ada_95;
5078 Ada_Version_Explicit := Ada_Version;
5080 ---------------------
5081 -- Ada_05/Ada_2005 --
5082 ---------------------
5085 -- pragma Ada_05 (LOCAL_NAME);
5088 -- pragma Ada_2005 (LOCAL_NAME):
5090 -- Note: these pragma also have some specific processing in Par.Prag
5091 -- because we want to set the Ada 2005 version mode during parsing.
5093 when Pragma_Ada_05 | Pragma_Ada_2005 => declare
5099 if Arg_Count = 1 then
5100 Check_Arg_Is_Local_Name (Arg1);
5101 E_Id := Expression (Arg1);
5103 if Etype (E_Id) = Any_Type then
5107 Set_Is_Ada_2005_Only (Entity (E_Id));
5110 Check_Arg_Count (0);
5112 -- For Ada_2005 we unconditionally enforce the documented
5113 -- configuration pragma placement, since we do not want to
5114 -- tolerate mixed modes in a unit involving Ada 2005. That
5115 -- would cause real difficulties for those cases where there
5116 -- are incompatibilities between Ada 95 and Ada 2005.
5118 Check_Valid_Configuration_Pragma;
5120 -- Now set Ada 2005 mode
5122 Ada_Version := Ada_05;
5123 Ada_Version_Explicit := Ada_05;
5127 ----------------------
5128 -- All_Calls_Remote --
5129 ----------------------
5131 -- pragma All_Calls_Remote [(library_package_NAME)];
5133 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
5134 Lib_Entity : Entity_Id;
5137 Check_Ada_83_Warning;
5138 Check_Valid_Library_Unit_Pragma;
5140 if Nkind (N) = N_Null_Statement then
5144 Lib_Entity := Find_Lib_Unit_Name;
5146 -- This pragma should only apply to a RCI unit (RM E.2.3(23))
5148 if Present (Lib_Entity)
5149 and then not Debug_Flag_U
5151 if not Is_Remote_Call_Interface (Lib_Entity) then
5152 Error_Pragma ("pragma% only apply to rci unit");
5154 -- Set flag for entity of the library unit
5157 Set_Has_All_Calls_Remote (Lib_Entity);
5161 end All_Calls_Remote;
5167 -- pragma Annotate (IDENTIFIER {, ARG});
5168 -- ARG ::= NAME | EXPRESSION
5170 when Pragma_Annotate => Annotate : begin
5172 Check_At_Least_N_Arguments (1);
5173 Check_Arg_Is_Identifier (Arg1);
5181 while Present (Arg) loop
5182 Exp := Expression (Arg);
5185 if Is_Entity_Name (Exp) then
5188 elsif Nkind (Exp) = N_String_Literal then
5189 Resolve (Exp, Standard_String);
5191 elsif Is_Overloaded (Exp) then
5192 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
5207 -- pragma Assert ([Check =>] Boolean_EXPRESSION
5208 -- [, [Message =>] Static_String_EXPRESSION]);
5210 when Pragma_Assert => Assert : declare
5216 Check_At_Least_N_Arguments (1);
5217 Check_At_Most_N_Arguments (2);
5218 Check_Arg_Order ((Name_Check, Name_Message));
5219 Check_Optional_Identifier (Arg1, Name_Check);
5221 -- We treat pragma Assert as equivalent to:
5223 -- pragma Check (Assertion, condition [, msg]);
5225 -- So rewrite pragma in this manner, and analyze the result
5227 Expr := Get_Pragma_Arg (Arg1);
5229 Make_Pragma_Argument_Association (Loc,
5231 Make_Identifier (Loc,
5232 Chars => Name_Assertion)),
5234 Make_Pragma_Argument_Association (Sloc (Expr),
5235 Expression => Expr));
5237 if Arg_Count > 1 then
5238 Check_Optional_Identifier (Arg2, Name_Message);
5239 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
5240 Append_To (Newa, Relocate_Node (Arg2));
5245 Chars => Name_Check,
5246 Pragma_Argument_Associations => Newa));
5250 ----------------------
5251 -- Assertion_Policy --
5252 ----------------------
5254 -- pragma Assertion_Policy (Check | Ignore)
5256 when Pragma_Assertion_Policy => Assertion_Policy : declare
5261 Check_Valid_Configuration_Pragma;
5262 Check_Arg_Count (1);
5263 Check_No_Identifiers;
5264 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
5266 -- We treat pragma Assertion_Policy as equivalent to:
5268 -- pragma Check_Policy (Assertion, policy)
5270 -- So rewrite the pragma in that manner and link on to the chain
5271 -- of Check_Policy pragmas, marking the pragma as analyzed.
5273 Policy := Get_Pragma_Arg (Arg1);
5277 Chars => Name_Check_Policy,
5279 Pragma_Argument_Associations => New_List (
5280 Make_Pragma_Argument_Association (Loc,
5282 Make_Identifier (Loc,
5283 Chars => Name_Assertion)),
5285 Make_Pragma_Argument_Association (Loc,
5287 Make_Identifier (Sloc (Policy),
5288 Chars => Chars (Policy))))));
5291 Set_Next_Pragma (N, Opt.Check_Policy_List);
5292 Opt.Check_Policy_List := N;
5293 end Assertion_Policy;
5295 ------------------------------
5296 -- Assume_No_Invalid_Values --
5297 ------------------------------
5299 -- pragma Assume_No_Invalid_Values (On | Off);
5301 when Pragma_Assume_No_Invalid_Values =>
5303 Check_Valid_Configuration_Pragma;
5304 Check_Arg_Count (1);
5305 Check_No_Identifiers;
5306 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
5308 if Chars (Expression (Arg1)) = Name_On then
5309 Assume_No_Invalid_Values := True;
5311 Assume_No_Invalid_Values := False;
5318 -- pragma AST_Entry (entry_IDENTIFIER);
5320 when Pragma_AST_Entry => AST_Entry : declare
5326 Check_Arg_Count (1);
5327 Check_No_Identifiers;
5328 Check_Arg_Is_Local_Name (Arg1);
5329 Ent := Entity (Expression (Arg1));
5331 -- Note: the implementation of the AST_Entry pragma could handle
5332 -- the entry family case fine, but for now we are consistent with
5333 -- the DEC rules, and do not allow the pragma, which of course
5334 -- has the effect of also forbidding the attribute.
5336 if Ekind (Ent) /= E_Entry then
5338 ("pragma% argument must be simple entry name", Arg1);
5340 elsif Is_AST_Entry (Ent) then
5342 ("duplicate % pragma for entry", Arg1);
5344 elsif Has_Homonym (Ent) then
5346 ("pragma% argument cannot specify overloaded entry", Arg1);
5350 FF : constant Entity_Id := First_Formal (Ent);
5353 if Present (FF) then
5354 if Present (Next_Formal (FF)) then
5356 ("entry for pragma% can have only one argument",
5359 elsif Parameter_Mode (FF) /= E_In_Parameter then
5361 ("entry parameter for pragma% must have mode IN",
5367 Set_Is_AST_Entry (Ent);
5375 -- pragma Asynchronous (LOCAL_NAME);
5377 when Pragma_Asynchronous => Asynchronous : declare
5385 procedure Process_Async_Pragma;
5386 -- Common processing for procedure and access-to-procedure case
5388 --------------------------
5389 -- Process_Async_Pragma --
5390 --------------------------
5392 procedure Process_Async_Pragma is
5395 Set_Is_Asynchronous (Nm);
5399 -- The formals should be of mode IN (RM E.4.1(6))
5402 while Present (S) loop
5403 Formal := Defining_Identifier (S);
5405 if Nkind (Formal) = N_Defining_Identifier
5406 and then Ekind (Formal) /= E_In_Parameter
5409 ("pragma% procedure can only have IN parameter",
5416 Set_Is_Asynchronous (Nm);
5417 end Process_Async_Pragma;
5419 -- Start of processing for pragma Asynchronous
5422 Check_Ada_83_Warning;
5423 Check_No_Identifiers;
5424 Check_Arg_Count (1);
5425 Check_Arg_Is_Local_Name (Arg1);
5427 if Debug_Flag_U then
5431 C_Ent := Cunit_Entity (Current_Sem_Unit);
5432 Analyze (Expression (Arg1));
5433 Nm := Entity (Expression (Arg1));
5435 if not Is_Remote_Call_Interface (C_Ent)
5436 and then not Is_Remote_Types (C_Ent)
5438 -- This pragma should only appear in an RCI or Remote Types
5439 -- unit (RM E.4.1(4))
5442 ("pragma% not in Remote_Call_Interface or " &
5443 "Remote_Types unit");
5446 if Ekind (Nm) = E_Procedure
5447 and then Nkind (Parent (Nm)) = N_Procedure_Specification
5449 if not Is_Remote_Call_Interface (Nm) then
5451 ("pragma% cannot be applied on non-remote procedure",
5455 L := Parameter_Specifications (Parent (Nm));
5456 Process_Async_Pragma;
5459 elsif Ekind (Nm) = E_Function then
5461 ("pragma% cannot be applied to function", Arg1);
5463 elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
5465 if Is_Record_Type (Nm) then
5466 -- A record type that is the Equivalent_Type for
5467 -- a remote access-to-subprogram type.
5469 N := Declaration_Node (Corresponding_Remote_Type (Nm));
5472 -- A non-expanded RAS type (case where distribution is
5475 N := Declaration_Node (Nm);
5478 if Nkind (N) = N_Full_Type_Declaration
5479 and then Nkind (Type_Definition (N)) =
5480 N_Access_Procedure_Definition
5482 L := Parameter_Specifications (Type_Definition (N));
5483 Process_Async_Pragma;
5485 if Is_Asynchronous (Nm)
5486 and then Expander_Active
5487 and then Get_PCS_Name /= Name_No_DSA
5489 RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
5494 ("pragma% cannot reference access-to-function type",
5498 -- Only other possibility is Access-to-class-wide type
5500 elsif Is_Access_Type (Nm)
5501 and then Is_Class_Wide_Type (Designated_Type (Nm))
5503 Check_First_Subtype (Arg1);
5504 Set_Is_Asynchronous (Nm);
5505 if Expander_Active then
5506 RACW_Type_Is_Asynchronous (Nm);
5510 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
5518 -- pragma Atomic (LOCAL_NAME);
5520 when Pragma_Atomic =>
5521 Process_Atomic_Shared_Volatile;
5523 -----------------------
5524 -- Atomic_Components --
5525 -----------------------
5527 -- pragma Atomic_Components (array_LOCAL_NAME);
5529 -- This processing is shared by Volatile_Components
5531 when Pragma_Atomic_Components |
5532 Pragma_Volatile_Components =>
5534 Atomic_Components : declare
5541 Check_Ada_83_Warning;
5542 Check_No_Identifiers;
5543 Check_Arg_Count (1);
5544 Check_Arg_Is_Local_Name (Arg1);
5545 E_Id := Expression (Arg1);
5547 if Etype (E_Id) = Any_Type then
5553 if Rep_Item_Too_Early (E, N)
5555 Rep_Item_Too_Late (E, N)
5560 D := Declaration_Node (E);
5563 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
5565 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
5566 and then Nkind (D) = N_Object_Declaration
5567 and then Nkind (Object_Definition (D)) =
5568 N_Constrained_Array_Definition)
5570 -- The flag is set on the object, or on the base type
5572 if Nkind (D) /= N_Object_Declaration then
5576 Set_Has_Volatile_Components (E);
5578 if Prag_Id = Pragma_Atomic_Components then
5579 Set_Has_Atomic_Components (E);
5581 if Is_Packed (E) then
5582 Set_Is_Packed (E, False);
5585 ("?Pack canceled, cannot pack atomic components",
5591 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
5593 end Atomic_Components;
5595 --------------------
5596 -- Attach_Handler --
5597 --------------------
5599 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
5601 when Pragma_Attach_Handler =>
5602 Check_Ada_83_Warning;
5603 Check_No_Identifiers;
5604 Check_Arg_Count (2);
5606 if No_Run_Time_Mode then
5607 Error_Msg_CRT ("Attach_Handler pragma", N);
5609 Check_Interrupt_Or_Attach_Handler;
5611 -- The expression that designates the attribute may
5612 -- depend on a discriminant, and is therefore a per-
5613 -- object expression, to be expanded in the init proc.
5614 -- If expansion is enabled, perform semantic checks
5617 if Expander_Active then
5619 Temp : constant Node_Id :=
5620 New_Copy_Tree (Expression (Arg2));
5622 Set_Parent (Temp, N);
5623 Preanalyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
5627 Analyze (Expression (Arg2));
5628 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
5631 Process_Interrupt_Or_Attach_Handler;
5634 --------------------
5635 -- C_Pass_By_Copy --
5636 --------------------
5638 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
5640 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
5646 Check_Valid_Configuration_Pragma;
5647 Check_Arg_Count (1);
5648 Check_Optional_Identifier (Arg1, "max_size");
5650 Arg := Expression (Arg1);
5651 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
5653 Val := Expr_Value (Arg);
5657 ("maximum size for pragma% must be positive", Arg1);
5659 elsif UI_Is_In_Int_Range (Val) then
5660 Default_C_Record_Mechanism := UI_To_Int (Val);
5662 -- If a giant value is given, Int'Last will do well enough.
5663 -- If sometime someone complains that a record larger than
5664 -- two gigabytes is not copied, we will worry about it then!
5667 Default_C_Record_Mechanism := Mechanism_Type'Last;
5675 -- pragma Check ([Name =>] Identifier,
5676 -- [Check =>] Boolean_Expression
5677 -- [,[Message =>] String_Expression]);
5679 when Pragma_Check => Check : declare
5684 -- Set True if category of assertions referenced by Name enabled
5688 Check_At_Least_N_Arguments (2);
5689 Check_At_Most_N_Arguments (3);
5690 Check_Optional_Identifier (Arg1, Name_Name);
5691 Check_Optional_Identifier (Arg2, Name_Check);
5693 if Arg_Count = 3 then
5694 Check_Optional_Identifier (Arg3, Name_Message);
5695 Analyze_And_Resolve (Get_Pragma_Arg (Arg3), Standard_String);
5698 Check_Arg_Is_Identifier (Arg1);
5699 Check_On := Check_Enabled (Chars (Get_Pragma_Arg (Arg1)));
5701 -- If expansion is active and the check is not enabled then we
5702 -- rewrite the Check as:
5704 -- if False and then condition then
5708 -- The reason we do this rewriting during semantic analysis rather
5709 -- than as part of normal expansion is that we cannot analyze and
5710 -- expand the code for the boolean expression directly, or it may
5711 -- cause insertion of actions that would escape the attempt to
5712 -- suppress the check code.
5714 -- Note that the Sloc for the if statement corresponds to the
5715 -- argument condition, not the pragma itself. The reason for this
5716 -- is that we may generate a warning if the condition is False at
5717 -- compile time, and we do not want to delete this warning when we
5718 -- delete the if statement.
5720 Expr := Expression (Arg2);
5722 if Expander_Active and then not Check_On then
5723 Eloc := Sloc (Expr);
5726 Make_If_Statement (Eloc,
5728 Make_And_Then (Eloc,
5729 Left_Opnd => New_Occurrence_Of (Standard_False, Eloc),
5730 Right_Opnd => Expr),
5731 Then_Statements => New_List (
5732 Make_Null_Statement (Eloc))));
5739 Analyze_And_Resolve (Expr, Any_Boolean);
5742 -- If assertion is of the form (X'First = literal), where X is
5743 -- a formal, then set Low_Bound_Known flag on this formal.
5745 if Nkind (Expr) = N_Op_Eq then
5747 Right : constant Node_Id := Right_Opnd (Expr);
5748 Left : constant Node_Id := Left_Opnd (Expr);
5750 if Nkind (Left) = N_Attribute_Reference
5751 and then Attribute_Name (Left) = Name_First
5752 and then Is_Entity_Name (Prefix (Left))
5753 and then Is_Formal (Entity (Prefix (Left)))
5754 and then Nkind (Right) = N_Integer_Literal
5756 Set_Low_Bound_Known (Entity (Prefix (Left)));
5766 -- pragma Check_Name (check_IDENTIFIER);
5768 when Pragma_Check_Name =>
5769 Check_No_Identifiers;
5771 Check_Valid_Configuration_Pragma;
5772 Check_Arg_Count (1);
5773 Check_Arg_Is_Identifier (Arg1);
5776 Nam : constant Name_Id := Chars (Expression (Arg1));
5779 for J in Check_Names.First .. Check_Names.Last loop
5780 if Check_Names.Table (J) = Nam then
5785 Check_Names.Append (Nam);
5792 -- pragma Check_Policy ([Name =>] IDENTIFIER,
5793 -- POLICY_IDENTIFIER;
5795 -- POLICY_IDENTIFIER ::= ON | OFF | CHECK | IGNORE
5797 -- Note: this is a configuration pragma, but it is allowed to
5798 -- appear anywhere else.
5800 when Pragma_Check_Policy =>
5802 Check_Arg_Count (2);
5803 Check_No_Identifier (Arg2);
5804 Check_Optional_Identifier (Arg1, Name_Name);
5806 (Arg2, Name_On, Name_Off, Name_Check, Name_Ignore);
5808 -- A Check_Policy pragma can appear either as a configuration
5809 -- pragma, or in a declarative part or a package spec (see RM
5810 -- 11.5(5) for rules for Suppress/Unsuppress which are also
5811 -- followed for Check_Policy).
5813 if not Is_Configuration_Pragma then
5814 Check_Is_In_Decl_Part_Or_Package_Spec;
5817 Set_Next_Pragma (N, Opt.Check_Policy_List);
5818 Opt.Check_Policy_List := N;
5820 ---------------------
5821 -- CIL_Constructor --
5822 ---------------------
5824 -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME);
5826 -- Processing for this pragma is shared with Java_Constructor
5832 -- pragma Comment (static_string_EXPRESSION)
5834 -- Processing for pragma Comment shares the circuitry for pragma
5835 -- Ident. The only differences are that Ident enforces a limit of 31
5836 -- characters on its argument, and also enforces limitations on
5837 -- placement for DEC compatibility. Pragma Comment shares neither of
5838 -- these restrictions.
5844 -- pragma Common_Object (
5845 -- [Internal =>] LOCAL_NAME
5846 -- [, [External =>] EXTERNAL_SYMBOL]
5847 -- [, [Size =>] EXTERNAL_SYMBOL]);
5849 -- Processing for this pragma is shared with Psect_Object
5851 ------------------------
5852 -- Compile_Time_Error --
5853 ------------------------
5855 -- pragma Compile_Time_Error
5856 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5858 when Pragma_Compile_Time_Error =>
5860 Process_Compile_Time_Warning_Or_Error;
5862 --------------------------
5863 -- Compile_Time_Warning --
5864 --------------------------
5866 -- pragma Compile_Time_Warning
5867 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5869 when Pragma_Compile_Time_Warning =>
5871 Process_Compile_Time_Warning_Or_Error;
5877 when Pragma_Compiler_Unit =>
5879 Check_Arg_Count (0);
5880 Set_Is_Compiler_Unit (Get_Source_Unit (N));
5882 -----------------------------
5883 -- Complete_Representation --
5884 -----------------------------
5886 -- pragma Complete_Representation;
5888 when Pragma_Complete_Representation =>
5890 Check_Arg_Count (0);
5892 if Nkind (Parent (N)) /= N_Record_Representation_Clause then
5894 ("pragma & must appear within record representation clause");
5897 ----------------------------
5898 -- Complex_Representation --
5899 ----------------------------
5901 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
5903 when Pragma_Complex_Representation => Complex_Representation : declare
5910 Check_Arg_Count (1);
5911 Check_Optional_Identifier (Arg1, Name_Entity);
5912 Check_Arg_Is_Local_Name (Arg1);
5913 E_Id := Expression (Arg1);
5915 if Etype (E_Id) = Any_Type then
5921 if not Is_Record_Type (E) then
5923 ("argument for pragma% must be record type", Arg1);
5926 Ent := First_Entity (E);
5929 or else No (Next_Entity (Ent))
5930 or else Present (Next_Entity (Next_Entity (Ent)))
5931 or else not Is_Floating_Point_Type (Etype (Ent))
5932 or else Etype (Ent) /= Etype (Next_Entity (Ent))
5935 ("record for pragma% must have two fields of the same "
5936 & "floating-point type", Arg1);
5939 Set_Has_Complex_Representation (Base_Type (E));
5941 -- We need to treat the type has having a non-standard
5942 -- representation, for back-end purposes, even though in
5943 -- general a complex will have the default representation
5944 -- of a record with two real components.
5946 Set_Has_Non_Standard_Rep (Base_Type (E));
5948 end Complex_Representation;
5950 -------------------------
5951 -- Component_Alignment --
5952 -------------------------
5954 -- pragma Component_Alignment (
5955 -- [Form =>] ALIGNMENT_CHOICE
5956 -- [, [Name =>] type_LOCAL_NAME]);
5958 -- ALIGNMENT_CHOICE ::=
5960 -- | Component_Size_4
5964 when Pragma_Component_Alignment => Component_AlignmentP : declare
5965 Args : Args_List (1 .. 2);
5966 Names : constant Name_List (1 .. 2) := (
5970 Form : Node_Id renames Args (1);
5971 Name : Node_Id renames Args (2);
5973 Atype : Component_Alignment_Kind;
5978 Gather_Associations (Names, Args);
5981 Error_Pragma ("missing Form argument for pragma%");
5984 Check_Arg_Is_Identifier (Form);
5986 -- Get proper alignment, note that Default = Component_Size
5987 -- on all machines we have so far, and we want to set this
5988 -- value rather than the default value to indicate that it
5989 -- has been explicitly set (and thus will not get overridden
5990 -- by the default component alignment for the current scope)
5992 if Chars (Form) = Name_Component_Size then
5993 Atype := Calign_Component_Size;
5995 elsif Chars (Form) = Name_Component_Size_4 then
5996 Atype := Calign_Component_Size_4;
5998 elsif Chars (Form) = Name_Default then
5999 Atype := Calign_Component_Size;
6001 elsif Chars (Form) = Name_Storage_Unit then
6002 Atype := Calign_Storage_Unit;
6006 ("invalid Form parameter for pragma%", Form);
6009 -- Case with no name, supplied, affects scope table entry
6013 (Scope_Stack.Last).Component_Alignment_Default := Atype;
6015 -- Case of name supplied
6018 Check_Arg_Is_Local_Name (Name);
6020 Typ := Entity (Name);
6023 or else Rep_Item_Too_Early (Typ, N)
6027 Typ := Underlying_Type (Typ);
6030 if not Is_Record_Type (Typ)
6031 and then not Is_Array_Type (Typ)
6034 ("Name parameter of pragma% must identify record or " &
6035 "array type", Name);
6038 -- An explicit Component_Alignment pragma overrides an
6039 -- implicit pragma Pack, but not an explicit one.
6041 if not Has_Pragma_Pack (Base_Type (Typ)) then
6042 Set_Is_Packed (Base_Type (Typ), False);
6043 Set_Component_Alignment (Base_Type (Typ), Atype);
6046 end Component_AlignmentP;
6052 -- pragma Controlled (first_subtype_LOCAL_NAME);
6054 when Pragma_Controlled => Controlled : declare
6058 Check_No_Identifiers;
6059 Check_Arg_Count (1);
6060 Check_Arg_Is_Local_Name (Arg1);
6061 Arg := Expression (Arg1);
6063 if not Is_Entity_Name (Arg)
6064 or else not Is_Access_Type (Entity (Arg))
6066 Error_Pragma_Arg ("pragma% requires access type", Arg1);
6068 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
6076 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
6077 -- [Entity =>] LOCAL_NAME);
6079 when Pragma_Convention => Convention : declare
6082 pragma Warnings (Off, C);
6083 pragma Warnings (Off, E);
6085 Check_Arg_Order ((Name_Convention, Name_Entity));
6086 Check_Ada_83_Warning;
6087 Check_Arg_Count (2);
6088 Process_Convention (C, E);
6091 ---------------------------
6092 -- Convention_Identifier --
6093 ---------------------------
6095 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
6096 -- [Convention =>] convention_IDENTIFIER);
6098 when Pragma_Convention_Identifier => Convention_Identifier : declare
6104 Check_Arg_Order ((Name_Name, Name_Convention));
6105 Check_Arg_Count (2);
6106 Check_Optional_Identifier (Arg1, Name_Name);
6107 Check_Optional_Identifier (Arg2, Name_Convention);
6108 Check_Arg_Is_Identifier (Arg1);
6109 Check_Arg_Is_Identifier (Arg2);
6110 Idnam := Chars (Expression (Arg1));
6111 Cname := Chars (Expression (Arg2));
6113 if Is_Convention_Name (Cname) then
6114 Record_Convention_Identifier
6115 (Idnam, Get_Convention_Id (Cname));
6118 ("second arg for % pragma must be convention", Arg2);
6120 end Convention_Identifier;
6126 -- pragma CPP_Class ([Entity =>] local_NAME)
6128 when Pragma_CPP_Class => CPP_Class : declare
6133 if Warn_On_Obsolescent_Feature then
6135 ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" &
6136 " by pragma import?", N);
6140 Check_Arg_Count (1);
6141 Check_Optional_Identifier (Arg1, Name_Entity);
6142 Check_Arg_Is_Local_Name (Arg1);
6144 Arg := Expression (Arg1);
6147 if Etype (Arg) = Any_Type then
6151 if not Is_Entity_Name (Arg)
6152 or else not Is_Type (Entity (Arg))
6154 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
6157 Typ := Entity (Arg);
6159 if not Is_Tagged_Type (Typ) then
6160 Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1);
6163 -- Types treated as CPP classes are treated as limited, but we
6164 -- don't require them to be declared this way. A warning is issued
6165 -- to encourage the user to declare them as limited. This is not
6166 -- an error, for compatibility reasons, because these types have
6167 -- been supported this way for some time.
6169 if not Is_Limited_Type (Typ) then
6171 ("imported 'C'P'P type should be " &
6172 "explicitly declared limited?",
6173 Get_Pragma_Arg (Arg1));
6175 ("\type will be considered limited",
6176 Get_Pragma_Arg (Arg1));
6179 Set_Is_CPP_Class (Typ);
6180 Set_Is_Limited_Record (Typ);
6181 Set_Convention (Typ, Convention_CPP);
6184 ---------------------
6185 -- CPP_Constructor --
6186 ---------------------
6188 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME
6189 -- [, [External_Name =>] static_string_EXPRESSION ]
6190 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6192 when Pragma_CPP_Constructor => CPP_Constructor : declare
6198 Check_At_Least_N_Arguments (1);
6199 Check_At_Most_N_Arguments (3);
6200 Check_Optional_Identifier (Arg1, Name_Entity);
6201 Check_Arg_Is_Local_Name (Arg1);
6203 Id := Expression (Arg1);
6204 Find_Program_Unit_Name (Id);
6206 -- If we did not find the name, we are done
6208 if Etype (Id) = Any_Type then
6212 Def_Id := Entity (Id);
6214 if Ekind (Def_Id) = E_Function
6215 and then Is_Class_Wide_Type (Etype (Def_Id))
6216 and then Is_CPP_Class (Etype (Etype (Def_Id)))
6218 if Arg_Count >= 2 then
6219 Set_Imported (Def_Id);
6220 Set_Is_Public (Def_Id);
6221 Process_Interface_Name (Def_Id, Arg2, Arg3);
6224 if No (Parameter_Specifications (Parent (Def_Id))) then
6225 Set_Has_Completion (Def_Id);
6226 Set_Is_Constructor (Def_Id);
6229 ("non-default constructors not implemented", Arg1);
6234 ("pragma% requires function returning a 'C'P'P_Class type",
6237 end CPP_Constructor;
6243 when Pragma_CPP_Virtual => CPP_Virtual : declare
6247 if Warn_On_Obsolescent_Feature then
6249 ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " &
6258 when Pragma_CPP_Vtable => CPP_Vtable : declare
6262 if Warn_On_Obsolescent_Feature then
6264 ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " &
6273 -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
6275 when Pragma_Debug => Debug : declare
6283 (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
6286 if Arg_Count = 2 then
6289 Left_Opnd => Relocate_Node (Cond),
6290 Right_Opnd => Expression (Arg1));
6293 -- Rewrite into a conditional with an appropriate condition. We
6294 -- wrap the procedure call in a block so that overhead from e.g.
6295 -- use of the secondary stack does not generate execution overhead
6296 -- for suppressed conditions.
6298 Rewrite (N, Make_Implicit_If_Statement (N,
6300 Then_Statements => New_List (
6301 Make_Block_Statement (Loc,
6302 Handled_Statement_Sequence =>
6303 Make_Handled_Sequence_Of_Statements (Loc,
6304 Statements => New_List (
6305 Relocate_Node (Debug_Statement (N))))))));
6313 -- pragma Debug_Policy (Check | Ignore)
6315 when Pragma_Debug_Policy =>
6317 Check_Arg_Count (1);
6318 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
6319 Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
6321 ---------------------
6322 -- Detect_Blocking --
6323 ---------------------
6325 -- pragma Detect_Blocking;
6327 when Pragma_Detect_Blocking =>
6329 Check_Arg_Count (0);
6330 Check_Valid_Configuration_Pragma;
6331 Detect_Blocking := True;
6337 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
6339 when Pragma_Discard_Names => Discard_Names : declare
6344 Check_Ada_83_Warning;
6346 -- Deal with configuration pragma case
6348 if Arg_Count = 0 and then Is_Configuration_Pragma then
6349 Global_Discard_Names := True;
6352 -- Otherwise, check correct appropriate context
6355 Check_Is_In_Decl_Part_Or_Package_Spec;
6357 if Arg_Count = 0 then
6359 -- If there is no parameter, then from now on this pragma
6360 -- applies to any enumeration, exception or tagged type
6361 -- defined in the current declarative part, and recursively
6362 -- to any nested scope.
6364 Set_Discard_Names (Current_Scope);
6368 Check_Arg_Count (1);
6369 Check_Optional_Identifier (Arg1, Name_On);
6370 Check_Arg_Is_Local_Name (Arg1);
6372 E_Id := Expression (Arg1);
6374 if Etype (E_Id) = Any_Type then
6380 if (Is_First_Subtype (E)
6382 (Is_Enumeration_Type (E) or else Is_Tagged_Type (E)))
6383 or else Ekind (E) = E_Exception
6385 Set_Discard_Names (E);
6388 ("inappropriate entity for pragma%", Arg1);
6399 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
6401 when Pragma_Elaborate => Elaborate : declare
6406 -- Pragma must be in context items list of a compilation unit
6408 if not Is_In_Context_Clause then
6412 -- Must be at least one argument
6414 if Arg_Count = 0 then
6415 Error_Pragma ("pragma% requires at least one argument");
6418 -- In Ada 83 mode, there can be no items following it in the
6419 -- context list except other pragmas and implicit with clauses
6420 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
6421 -- placement rule does not apply.
6423 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
6425 while Present (Citem) loop
6426 if Nkind (Citem) = N_Pragma
6427 or else (Nkind (Citem) = N_With_Clause
6428 and then Implicit_With (Citem))
6433 ("(Ada 83) pragma% must be at end of context clause");
6440 -- Finally, the arguments must all be units mentioned in a with
6441 -- clause in the same context clause. Note we already checked (in
6442 -- Par.Prag) that the arguments are all identifiers or selected
6446 Outer : while Present (Arg) loop
6447 Citem := First (List_Containing (N));
6448 Inner : while Citem /= N loop
6449 if Nkind (Citem) = N_With_Clause
6450 and then Same_Name (Name (Citem), Expression (Arg))
6452 Set_Elaborate_Present (Citem, True);
6453 Set_Unit_Name (Expression (Arg), Name (Citem));
6455 -- With the pragma present, elaboration calls on
6456 -- subprograms from the named unit need no further
6457 -- checks, as long as the pragma appears in the current
6458 -- compilation unit. If the pragma appears in some unit
6459 -- in the context, there might still be a need for an
6460 -- Elaborate_All_Desirable from the current compilation
6461 -- to the named unit, so we keep the check enabled.
6463 if In_Extended_Main_Source_Unit (N) then
6464 Set_Suppress_Elaboration_Warnings
6465 (Entity (Name (Citem)));
6476 ("argument of pragma% is not with'ed unit", Arg);
6482 -- Give a warning if operating in static mode with -gnatwl
6483 -- (elaboration warnings enabled) switch set.
6485 if Elab_Warnings and not Dynamic_Elaboration_Checks then
6487 ("?use of pragma Elaborate may not be safe", N);
6489 ("?use pragma Elaborate_All instead if possible", N);
6497 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
6499 when Pragma_Elaborate_All => Elaborate_All : declare
6504 Check_Ada_83_Warning;
6506 -- Pragma must be in context items list of a compilation unit
6508 if not Is_In_Context_Clause then
6512 -- Must be at least one argument
6514 if Arg_Count = 0 then
6515 Error_Pragma ("pragma% requires at least one argument");
6518 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
6519 -- have to appear at the end of the context clause, but may
6520 -- appear mixed in with other items, even in Ada 83 mode.
6522 -- Final check: the arguments must all be units mentioned in
6523 -- a with clause in the same context clause. Note that we
6524 -- already checked (in Par.Prag) that all the arguments are
6525 -- either identifiers or selected components.
6528 Outr : while Present (Arg) loop
6529 Citem := First (List_Containing (N));
6530 Innr : while Citem /= N loop
6531 if Nkind (Citem) = N_With_Clause
6532 and then Same_Name (Name (Citem), Expression (Arg))
6534 Set_Elaborate_All_Present (Citem, True);
6535 Set_Unit_Name (Expression (Arg), Name (Citem));
6537 -- Suppress warnings and elaboration checks on the named
6538 -- unit if the pragma is in the current compilation, as
6539 -- for pragma Elaborate.
6541 if In_Extended_Main_Source_Unit (N) then
6542 Set_Suppress_Elaboration_Warnings
6543 (Entity (Name (Citem)));
6552 Set_Error_Posted (N);
6554 ("argument of pragma% is not with'ed unit", Arg);
6561 --------------------
6562 -- Elaborate_Body --
6563 --------------------
6565 -- pragma Elaborate_Body [( library_unit_NAME )];
6567 when Pragma_Elaborate_Body => Elaborate_Body : declare
6568 Cunit_Node : Node_Id;
6569 Cunit_Ent : Entity_Id;
6572 Check_Ada_83_Warning;
6573 Check_Valid_Library_Unit_Pragma;
6575 if Nkind (N) = N_Null_Statement then
6579 Cunit_Node := Cunit (Current_Sem_Unit);
6580 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
6582 if Nkind (Unit (Cunit_Node)) = N_Package_Body
6584 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
6586 Error_Pragma ("pragma% must refer to a spec, not a body");
6588 Set_Body_Required (Cunit_Node, True);
6589 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
6591 -- If we are in dynamic elaboration mode, then we suppress
6592 -- elaboration warnings for the unit, since it is definitely
6593 -- fine NOT to do dynamic checks at the first level (and such
6594 -- checks will be suppressed because no elaboration boolean
6595 -- is created for Elaborate_Body packages).
6597 -- But in the static model of elaboration, Elaborate_Body is
6598 -- definitely NOT good enough to ensure elaboration safety on
6599 -- its own, since the body may WITH other units that are not
6600 -- safe from an elaboration point of view, so a client must
6601 -- still do an Elaborate_All on such units.
6603 -- Debug flag -gnatdD restores the old behavior of 3.13,
6604 -- where Elaborate_Body always suppressed elab warnings.
6606 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
6607 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
6612 ------------------------
6613 -- Elaboration_Checks --
6614 ------------------------
6616 -- pragma Elaboration_Checks (Static | Dynamic);
6618 when Pragma_Elaboration_Checks =>
6620 Check_Arg_Count (1);
6621 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
6622 Dynamic_Elaboration_Checks :=
6623 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
6629 -- pragma Eliminate (
6630 -- [Unit_Name =>] IDENTIFIER |
6631 -- SELECTED_COMPONENT
6632 -- [,[Entity =>] IDENTIFIER |
6633 -- SELECTED_COMPONENT |
6635 -- [,]OVERLOADING_RESOLUTION);
6637 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
6640 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
6643 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
6645 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
6646 -- Result_Type => result_SUBTYPE_NAME]
6648 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
6649 -- SUBTYPE_NAME ::= STRING_LITERAL
6651 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
6652 -- SOURCE_TRACE ::= STRING_LITERAL
6654 when Pragma_Eliminate => Eliminate : declare
6655 Args : Args_List (1 .. 5);
6656 Names : constant Name_List (1 .. 5) := (
6659 Name_Parameter_Types,
6661 Name_Source_Location);
6663 Unit_Name : Node_Id renames Args (1);
6664 Entity : Node_Id renames Args (2);
6665 Parameter_Types : Node_Id renames Args (3);
6666 Result_Type : Node_Id renames Args (4);
6667 Source_Location : Node_Id renames Args (5);
6671 Check_Valid_Configuration_Pragma;
6672 Gather_Associations (Names, Args);
6674 if No (Unit_Name) then
6675 Error_Pragma ("missing Unit_Name argument for pragma%");
6679 and then (Present (Parameter_Types)
6681 Present (Result_Type)
6683 Present (Source_Location))
6685 Error_Pragma ("missing Entity argument for pragma%");
6688 if (Present (Parameter_Types)
6690 Present (Result_Type))
6692 Present (Source_Location)
6695 ("parameter profile and source location cannot " &
6696 "be used together in pragma%");
6699 Process_Eliminate_Pragma
6713 -- [ Convention =>] convention_IDENTIFIER,
6714 -- [ Entity =>] local_NAME
6715 -- [, [External_Name =>] static_string_EXPRESSION ]
6716 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6718 when Pragma_Export => Export : declare
6722 pragma Warnings (Off, C);
6725 Check_Ada_83_Warning;
6731 Check_At_Least_N_Arguments (2);
6732 Check_At_Most_N_Arguments (4);
6733 Process_Convention (C, Def_Id);
6735 if Ekind (Def_Id) /= E_Constant then
6736 Note_Possible_Modification (Expression (Arg2), Sure => False);
6739 Process_Interface_Name (Def_Id, Arg3, Arg4);
6740 Set_Exported (Def_Id, Arg2);
6742 -- If the entity is a deferred constant, propagate the
6743 -- information to the full view, because gigi elaborates
6744 -- the full view only.
6746 if Ekind (Def_Id) = E_Constant
6747 and then Present (Full_View (Def_Id))
6750 Id2 : constant Entity_Id := Full_View (Def_Id);
6752 Set_Is_Exported (Id2, Is_Exported (Def_Id));
6753 Set_First_Rep_Item (Id2, First_Rep_Item (Def_Id));
6754 Set_Interface_Name (Id2, Einfo.Interface_Name (Def_Id));
6759 ----------------------
6760 -- Export_Exception --
6761 ----------------------
6763 -- pragma Export_Exception (
6764 -- [Internal =>] LOCAL_NAME
6765 -- [, [External =>] EXTERNAL_SYMBOL]
6766 -- [, [Form =>] Ada | VMS]
6767 -- [, [Code =>] static_integer_EXPRESSION]);
6769 when Pragma_Export_Exception => Export_Exception : declare
6770 Args : Args_List (1 .. 4);
6771 Names : constant Name_List (1 .. 4) := (
6777 Internal : Node_Id renames Args (1);
6778 External : Node_Id renames Args (2);
6779 Form : Node_Id renames Args (3);
6780 Code : Node_Id renames Args (4);
6785 if Inside_A_Generic then
6786 Error_Pragma ("pragma% cannot be used for generic entities");
6789 Gather_Associations (Names, Args);
6790 Process_Extended_Import_Export_Exception_Pragma (
6791 Arg_Internal => Internal,
6792 Arg_External => External,
6796 if not Is_VMS_Exception (Entity (Internal)) then
6797 Set_Exported (Entity (Internal), Internal);
6799 end Export_Exception;
6801 ---------------------
6802 -- Export_Function --
6803 ---------------------
6805 -- pragma Export_Function (
6806 -- [Internal =>] LOCAL_NAME
6807 -- [, [External =>] EXTERNAL_SYMBOL]
6808 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6809 -- [, [Result_Type =>] TYPE_DESIGNATOR]
6810 -- [, [Mechanism =>] MECHANISM]
6811 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
6813 -- EXTERNAL_SYMBOL ::=
6815 -- | static_string_EXPRESSION
6817 -- PARAMETER_TYPES ::=
6819 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6821 -- TYPE_DESIGNATOR ::=
6823 -- | subtype_Name ' Access
6827 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6829 -- MECHANISM_ASSOCIATION ::=
6830 -- [formal_parameter_NAME =>] MECHANISM_NAME
6832 -- MECHANISM_NAME ::=
6835 -- | Descriptor [([Class =>] CLASS_NAME)]
6837 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6839 when Pragma_Export_Function => Export_Function : declare
6840 Args : Args_List (1 .. 6);
6841 Names : constant Name_List (1 .. 6) := (
6844 Name_Parameter_Types,
6847 Name_Result_Mechanism);
6849 Internal : Node_Id renames Args (1);
6850 External : Node_Id renames Args (2);
6851 Parameter_Types : Node_Id renames Args (3);
6852 Result_Type : Node_Id renames Args (4);
6853 Mechanism : Node_Id renames Args (5);
6854 Result_Mechanism : Node_Id renames Args (6);
6858 Gather_Associations (Names, Args);
6859 Process_Extended_Import_Export_Subprogram_Pragma (
6860 Arg_Internal => Internal,
6861 Arg_External => External,
6862 Arg_Parameter_Types => Parameter_Types,
6863 Arg_Result_Type => Result_Type,
6864 Arg_Mechanism => Mechanism,
6865 Arg_Result_Mechanism => Result_Mechanism);
6866 end Export_Function;
6872 -- pragma Export_Object (
6873 -- [Internal =>] LOCAL_NAME
6874 -- [, [External =>] EXTERNAL_SYMBOL]
6875 -- [, [Size =>] EXTERNAL_SYMBOL]);
6877 -- EXTERNAL_SYMBOL ::=
6879 -- | static_string_EXPRESSION
6881 -- PARAMETER_TYPES ::=
6883 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6885 -- TYPE_DESIGNATOR ::=
6887 -- | subtype_Name ' Access
6891 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6893 -- MECHANISM_ASSOCIATION ::=
6894 -- [formal_parameter_NAME =>] MECHANISM_NAME
6896 -- MECHANISM_NAME ::=
6899 -- | Descriptor [([Class =>] CLASS_NAME)]
6901 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6903 when Pragma_Export_Object => Export_Object : declare
6904 Args : Args_List (1 .. 3);
6905 Names : constant Name_List (1 .. 3) := (
6910 Internal : Node_Id renames Args (1);
6911 External : Node_Id renames Args (2);
6912 Size : Node_Id renames Args (3);
6916 Gather_Associations (Names, Args);
6917 Process_Extended_Import_Export_Object_Pragma (
6918 Arg_Internal => Internal,
6919 Arg_External => External,
6923 ----------------------
6924 -- Export_Procedure --
6925 ----------------------
6927 -- pragma Export_Procedure (
6928 -- [Internal =>] LOCAL_NAME
6929 -- [, [External =>] EXTERNAL_SYMBOL]
6930 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6931 -- [, [Mechanism =>] MECHANISM]);
6933 -- EXTERNAL_SYMBOL ::=
6935 -- | static_string_EXPRESSION
6937 -- PARAMETER_TYPES ::=
6939 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6941 -- TYPE_DESIGNATOR ::=
6943 -- | subtype_Name ' Access
6947 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6949 -- MECHANISM_ASSOCIATION ::=
6950 -- [formal_parameter_NAME =>] MECHANISM_NAME
6952 -- MECHANISM_NAME ::=
6955 -- | Descriptor [([Class =>] CLASS_NAME)]
6957 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6959 when Pragma_Export_Procedure => Export_Procedure : declare
6960 Args : Args_List (1 .. 4);
6961 Names : constant Name_List (1 .. 4) := (
6964 Name_Parameter_Types,
6967 Internal : Node_Id renames Args (1);
6968 External : Node_Id renames Args (2);
6969 Parameter_Types : Node_Id renames Args (3);
6970 Mechanism : Node_Id renames Args (4);
6974 Gather_Associations (Names, Args);
6975 Process_Extended_Import_Export_Subprogram_Pragma (
6976 Arg_Internal => Internal,
6977 Arg_External => External,
6978 Arg_Parameter_Types => Parameter_Types,
6979 Arg_Mechanism => Mechanism);
6980 end Export_Procedure;
6986 -- pragma Export_Value (
6987 -- [Value =>] static_integer_EXPRESSION,
6988 -- [Link_Name =>] static_string_EXPRESSION);
6990 when Pragma_Export_Value =>
6992 Check_Arg_Order ((Name_Value, Name_Link_Name));
6993 Check_Arg_Count (2);
6995 Check_Optional_Identifier (Arg1, Name_Value);
6996 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6998 Check_Optional_Identifier (Arg2, Name_Link_Name);
6999 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7001 -----------------------------
7002 -- Export_Valued_Procedure --
7003 -----------------------------
7005 -- pragma Export_Valued_Procedure (
7006 -- [Internal =>] LOCAL_NAME
7007 -- [, [External =>] EXTERNAL_SYMBOL,]
7008 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7009 -- [, [Mechanism =>] MECHANISM]);
7011 -- EXTERNAL_SYMBOL ::=
7013 -- | static_string_EXPRESSION
7015 -- PARAMETER_TYPES ::=
7017 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7019 -- TYPE_DESIGNATOR ::=
7021 -- | subtype_Name ' Access
7025 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7027 -- MECHANISM_ASSOCIATION ::=
7028 -- [formal_parameter_NAME =>] MECHANISM_NAME
7030 -- MECHANISM_NAME ::=
7033 -- | Descriptor [([Class =>] CLASS_NAME)]
7035 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7037 when Pragma_Export_Valued_Procedure =>
7038 Export_Valued_Procedure : declare
7039 Args : Args_List (1 .. 4);
7040 Names : constant Name_List (1 .. 4) := (
7043 Name_Parameter_Types,
7046 Internal : Node_Id renames Args (1);
7047 External : Node_Id renames Args (2);
7048 Parameter_Types : Node_Id renames Args (3);
7049 Mechanism : Node_Id renames Args (4);
7053 Gather_Associations (Names, Args);
7054 Process_Extended_Import_Export_Subprogram_Pragma (
7055 Arg_Internal => Internal,
7056 Arg_External => External,
7057 Arg_Parameter_Types => Parameter_Types,
7058 Arg_Mechanism => Mechanism);
7059 end Export_Valued_Procedure;
7065 -- pragma Extend_System ([Name =>] Identifier);
7067 when Pragma_Extend_System => Extend_System : declare
7070 Check_Valid_Configuration_Pragma;
7071 Check_Arg_Count (1);
7072 Check_Optional_Identifier (Arg1, Name_Name);
7073 Check_Arg_Is_Identifier (Arg1);
7075 Get_Name_String (Chars (Expression (Arg1)));
7078 and then Name_Buffer (1 .. 4) = "aux_"
7080 if Present (System_Extend_Pragma_Arg) then
7081 if Chars (Expression (Arg1)) =
7082 Chars (Expression (System_Extend_Pragma_Arg))
7086 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
7087 Error_Pragma ("pragma% conflicts with that #");
7091 System_Extend_Pragma_Arg := Arg1;
7093 if not GNAT_Mode then
7094 System_Extend_Unit := Arg1;
7098 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
7102 ------------------------
7103 -- Extensions_Allowed --
7104 ------------------------
7106 -- pragma Extensions_Allowed (ON | OFF);
7108 when Pragma_Extensions_Allowed =>
7110 Check_Arg_Count (1);
7111 Check_No_Identifiers;
7112 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
7114 if Chars (Expression (Arg1)) = Name_On then
7115 Extensions_Allowed := True;
7117 Extensions_Allowed := False;
7124 -- pragma External (
7125 -- [ Convention =>] convention_IDENTIFIER,
7126 -- [ Entity =>] local_NAME
7127 -- [, [External_Name =>] static_string_EXPRESSION ]
7128 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7130 when Pragma_External => External : declare
7134 pragma Warnings (Off, C);
7143 Check_At_Least_N_Arguments (2);
7144 Check_At_Most_N_Arguments (4);
7145 Process_Convention (C, Def_Id);
7146 Note_Possible_Modification (Expression (Arg2), Sure => False);
7147 Process_Interface_Name (Def_Id, Arg3, Arg4);
7148 Set_Exported (Def_Id, Arg2);
7151 --------------------------
7152 -- External_Name_Casing --
7153 --------------------------
7155 -- pragma External_Name_Casing (
7156 -- UPPERCASE | LOWERCASE
7157 -- [, AS_IS | UPPERCASE | LOWERCASE]);
7159 when Pragma_External_Name_Casing => External_Name_Casing : declare
7162 Check_No_Identifiers;
7164 if Arg_Count = 2 then
7166 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
7168 case Chars (Get_Pragma_Arg (Arg2)) is
7170 Opt.External_Name_Exp_Casing := As_Is;
7172 when Name_Uppercase =>
7173 Opt.External_Name_Exp_Casing := Uppercase;
7175 when Name_Lowercase =>
7176 Opt.External_Name_Exp_Casing := Lowercase;
7183 Check_Arg_Count (1);
7186 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
7188 case Chars (Get_Pragma_Arg (Arg1)) is
7189 when Name_Uppercase =>
7190 Opt.External_Name_Imp_Casing := Uppercase;
7192 when Name_Lowercase =>
7193 Opt.External_Name_Imp_Casing := Lowercase;
7198 end External_Name_Casing;
7200 --------------------------
7201 -- Favor_Top_Level --
7202 --------------------------
7204 -- pragma Favor_Top_Level (type_NAME);
7206 when Pragma_Favor_Top_Level => Favor_Top_Level : declare
7207 Named_Entity : Entity_Id;
7211 Check_No_Identifiers;
7212 Check_Arg_Count (1);
7213 Check_Arg_Is_Local_Name (Arg1);
7214 Named_Entity := Entity (Expression (Arg1));
7216 -- If it's an access-to-subprogram type (in particular, not a
7217 -- subtype), set the flag on that type.
7219 if Is_Access_Subprogram_Type (Named_Entity) then
7220 Set_Can_Use_Internal_Rep (Named_Entity, False);
7222 -- Otherwise it's an error (name denotes the wrong sort of entity)
7226 ("access-to-subprogram type expected", Expression (Arg1));
7228 end Favor_Top_Level;
7234 -- pragma Fast_Math;
7236 when Pragma_Fast_Math =>
7238 Check_No_Identifiers;
7239 Check_Valid_Configuration_Pragma;
7242 ---------------------------
7243 -- Finalize_Storage_Only --
7244 ---------------------------
7246 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
7248 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
7249 Assoc : constant Node_Id := Arg1;
7250 Type_Id : constant Node_Id := Expression (Assoc);
7255 Check_No_Identifiers;
7256 Check_Arg_Count (1);
7257 Check_Arg_Is_Local_Name (Arg1);
7259 Find_Type (Type_Id);
7260 Typ := Entity (Type_Id);
7263 or else Rep_Item_Too_Early (Typ, N)
7267 Typ := Underlying_Type (Typ);
7270 if not Is_Controlled (Typ) then
7271 Error_Pragma ("pragma% must specify controlled type");
7274 Check_First_Subtype (Arg1);
7276 if Finalize_Storage_Only (Typ) then
7277 Error_Pragma ("duplicate pragma%, only one allowed");
7279 elsif not Rep_Item_Too_Late (Typ, N) then
7280 Set_Finalize_Storage_Only (Base_Type (Typ), True);
7282 end Finalize_Storage;
7284 --------------------------
7285 -- Float_Representation --
7286 --------------------------
7288 -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
7290 -- FLOAT_REP ::= VAX_Float | IEEE_Float
7292 when Pragma_Float_Representation => Float_Representation : declare
7300 if Arg_Count = 1 then
7301 Check_Valid_Configuration_Pragma;
7303 Check_Arg_Count (2);
7304 Check_Optional_Identifier (Arg2, Name_Entity);
7305 Check_Arg_Is_Local_Name (Arg2);
7308 Check_No_Identifier (Arg1);
7309 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
7311 if not OpenVMS_On_Target then
7312 if Chars (Expression (Arg1)) = Name_VAX_Float then
7314 ("?pragma% ignored (applies only to Open'V'M'S)");
7320 -- One argument case
7322 if Arg_Count = 1 then
7323 if Chars (Expression (Arg1)) = Name_VAX_Float then
7324 if Opt.Float_Format = 'I' then
7325 Error_Pragma ("'I'E'E'E format previously specified");
7328 Opt.Float_Format := 'V';
7331 if Opt.Float_Format = 'V' then
7332 Error_Pragma ("'V'A'X format previously specified");
7335 Opt.Float_Format := 'I';
7338 Set_Standard_Fpt_Formats;
7340 -- Two argument case
7343 Argx := Get_Pragma_Arg (Arg2);
7345 if not Is_Entity_Name (Argx)
7346 or else not Is_Floating_Point_Type (Entity (Argx))
7349 ("second argument of% pragma must be floating-point type",
7353 Ent := Entity (Argx);
7354 Digs := UI_To_Int (Digits_Value (Ent));
7356 -- Two arguments, VAX_Float case
7358 if Chars (Expression (Arg1)) = Name_VAX_Float then
7360 when 6 => Set_F_Float (Ent);
7361 when 9 => Set_D_Float (Ent);
7362 when 15 => Set_G_Float (Ent);
7366 ("wrong digits value, must be 6,9 or 15", Arg2);
7369 -- Two arguments, IEEE_Float case
7373 when 6 => Set_IEEE_Short (Ent);
7374 when 15 => Set_IEEE_Long (Ent);
7378 ("wrong digits value, must be 6 or 15", Arg2);
7382 end Float_Representation;
7388 -- pragma Ident (static_string_EXPRESSION)
7390 -- Note: pragma Comment shares this processing. Pragma Comment
7391 -- is identical to Ident, except that the restriction of the
7392 -- argument to 31 characters and the placement restrictions
7393 -- are not enforced for pragma Comment.
7395 when Pragma_Ident | Pragma_Comment => Ident : declare
7400 Check_Arg_Count (1);
7401 Check_No_Identifiers;
7402 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7404 -- For pragma Ident, preserve DEC compatibility by requiring
7405 -- the pragma to appear in a declarative part or package spec.
7407 if Prag_Id = Pragma_Ident then
7408 Check_Is_In_Decl_Part_Or_Package_Spec;
7411 Str := Expr_Value_S (Expression (Arg1));
7418 GP := Parent (Parent (N));
7420 if Nkind (GP) = N_Package_Declaration
7422 Nkind (GP) = N_Generic_Package_Declaration
7427 -- If we have a compilation unit, then record the ident
7428 -- value, checking for improper duplication.
7430 if Nkind (GP) = N_Compilation_Unit then
7431 CS := Ident_String (Current_Sem_Unit);
7433 if Present (CS) then
7435 -- For Ident, we do not permit multiple instances
7437 if Prag_Id = Pragma_Ident then
7438 Error_Pragma ("duplicate% pragma not permitted");
7440 -- For Comment, we concatenate the string, unless we
7441 -- want to preserve the tree structure for ASIS.
7443 elsif not ASIS_Mode then
7444 Start_String (Strval (CS));
7445 Store_String_Char (' ');
7446 Store_String_Chars (Strval (Str));
7447 Set_Strval (CS, End_String);
7451 -- In VMS, the effect of IDENT is achieved by passing
7452 -- IDENTIFICATION=name as a --for-linker switch.
7454 if OpenVMS_On_Target then
7457 ("--for-linker=IDENTIFICATION=");
7458 String_To_Name_Buffer (Strval (Str));
7459 Store_String_Chars (Name_Buffer (1 .. Name_Len));
7461 -- Only the last processed IDENT is saved. The main
7462 -- purpose is so an IDENT associated with a main
7463 -- procedure will be used in preference to an IDENT
7464 -- associated with a with'd package.
7466 Replace_Linker_Option_String
7467 (End_String, "--for-linker=IDENTIFICATION=");
7470 Set_Ident_String (Current_Sem_Unit, Str);
7473 -- For subunits, we just ignore the Ident, since in GNAT
7474 -- these are not separate object files, and hence not
7475 -- separate units in the unit table.
7477 elsif Nkind (GP) = N_Subunit then
7480 -- Otherwise we have a misplaced pragma Ident, but we ignore
7481 -- this if we are in an instantiation, since it comes from
7482 -- a generic, and has no relevance to the instantiation.
7484 elsif Prag_Id = Pragma_Ident then
7485 if Instantiation_Location (Loc) = No_Location then
7486 Error_Pragma ("pragma% only allowed at outer level");
7492 --------------------------
7493 -- Implemented_By_Entry --
7494 --------------------------
7496 -- pragma Implemented_By_Entry (DIRECT_NAME);
7498 when Pragma_Implemented_By_Entry => Implemented_By_Entry : declare
7503 Check_Arg_Count (1);
7504 Check_No_Identifiers;
7505 Check_Arg_Is_Identifier (Arg1);
7506 Check_Arg_Is_Local_Name (Arg1);
7507 Ent := Entity (Expression (Arg1));
7509 -- Pragma Implemented_By_Entry must be applied only to protected
7510 -- synchronized or task interface primitives.
7512 if (Ekind (Ent) /= E_Function
7513 and then Ekind (Ent) /= E_Procedure)
7514 or else not Present (First_Formal (Ent))
7515 or else not Is_Concurrent_Interface (Etype (First_Formal (Ent)))
7518 ("pragma % must be applied to a concurrent interface " &
7522 if Einfo.Implemented_By_Entry (Ent)
7523 and then Warn_On_Redundant_Constructs
7525 Error_Pragma ("?duplicate pragma%!");
7527 Set_Implemented_By_Entry (Ent);
7530 end Implemented_By_Entry;
7532 -----------------------
7533 -- Implicit_Packing --
7534 -----------------------
7536 -- pragma Implicit_Packing;
7538 when Pragma_Implicit_Packing =>
7540 Check_Arg_Count (0);
7541 Implicit_Packing := True;
7548 -- [Convention =>] convention_IDENTIFIER,
7549 -- [Entity =>] local_NAME
7550 -- [, [External_Name =>] static_string_EXPRESSION ]
7551 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7553 when Pragma_Import =>
7554 Check_Ada_83_Warning;
7560 Check_At_Least_N_Arguments (2);
7561 Check_At_Most_N_Arguments (4);
7562 Process_Import_Or_Interface;
7564 ----------------------
7565 -- Import_Exception --
7566 ----------------------
7568 -- pragma Import_Exception (
7569 -- [Internal =>] LOCAL_NAME
7570 -- [, [External =>] EXTERNAL_SYMBOL]
7571 -- [, [Form =>] Ada | VMS]
7572 -- [, [Code =>] static_integer_EXPRESSION]);
7574 when Pragma_Import_Exception => Import_Exception : declare
7575 Args : Args_List (1 .. 4);
7576 Names : constant Name_List (1 .. 4) := (
7582 Internal : Node_Id renames Args (1);
7583 External : Node_Id renames Args (2);
7584 Form : Node_Id renames Args (3);
7585 Code : Node_Id renames Args (4);
7589 Gather_Associations (Names, Args);
7591 if Present (External) and then Present (Code) then
7593 ("cannot give both External and Code options for pragma%");
7596 Process_Extended_Import_Export_Exception_Pragma (
7597 Arg_Internal => Internal,
7598 Arg_External => External,
7602 if not Is_VMS_Exception (Entity (Internal)) then
7603 Set_Imported (Entity (Internal));
7605 end Import_Exception;
7607 ---------------------
7608 -- Import_Function --
7609 ---------------------
7611 -- pragma Import_Function (
7612 -- [Internal =>] LOCAL_NAME,
7613 -- [, [External =>] EXTERNAL_SYMBOL]
7614 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7615 -- [, [Result_Type =>] SUBTYPE_MARK]
7616 -- [, [Mechanism =>] MECHANISM]
7617 -- [, [Result_Mechanism =>] MECHANISM_NAME]
7618 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7620 -- EXTERNAL_SYMBOL ::=
7622 -- | static_string_EXPRESSION
7624 -- PARAMETER_TYPES ::=
7626 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7628 -- TYPE_DESIGNATOR ::=
7630 -- | subtype_Name ' Access
7634 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7636 -- MECHANISM_ASSOCIATION ::=
7637 -- [formal_parameter_NAME =>] MECHANISM_NAME
7639 -- MECHANISM_NAME ::=
7642 -- | Descriptor [([Class =>] CLASS_NAME)]
7644 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7646 when Pragma_Import_Function => Import_Function : declare
7647 Args : Args_List (1 .. 7);
7648 Names : constant Name_List (1 .. 7) := (
7651 Name_Parameter_Types,
7654 Name_Result_Mechanism,
7655 Name_First_Optional_Parameter);
7657 Internal : Node_Id renames Args (1);
7658 External : Node_Id renames Args (2);
7659 Parameter_Types : Node_Id renames Args (3);
7660 Result_Type : Node_Id renames Args (4);
7661 Mechanism : Node_Id renames Args (5);
7662 Result_Mechanism : Node_Id renames Args (6);
7663 First_Optional_Parameter : Node_Id renames Args (7);
7667 Gather_Associations (Names, Args);
7668 Process_Extended_Import_Export_Subprogram_Pragma (
7669 Arg_Internal => Internal,
7670 Arg_External => External,
7671 Arg_Parameter_Types => Parameter_Types,
7672 Arg_Result_Type => Result_Type,
7673 Arg_Mechanism => Mechanism,
7674 Arg_Result_Mechanism => Result_Mechanism,
7675 Arg_First_Optional_Parameter => First_Optional_Parameter);
7676 end Import_Function;
7682 -- pragma Import_Object (
7683 -- [Internal =>] LOCAL_NAME
7684 -- [, [External =>] EXTERNAL_SYMBOL]
7685 -- [, [Size =>] EXTERNAL_SYMBOL]);
7687 -- EXTERNAL_SYMBOL ::=
7689 -- | static_string_EXPRESSION
7691 when Pragma_Import_Object => Import_Object : declare
7692 Args : Args_List (1 .. 3);
7693 Names : constant Name_List (1 .. 3) := (
7698 Internal : Node_Id renames Args (1);
7699 External : Node_Id renames Args (2);
7700 Size : Node_Id renames Args (3);
7704 Gather_Associations (Names, Args);
7705 Process_Extended_Import_Export_Object_Pragma (
7706 Arg_Internal => Internal,
7707 Arg_External => External,
7711 ----------------------
7712 -- Import_Procedure --
7713 ----------------------
7715 -- pragma Import_Procedure (
7716 -- [Internal =>] LOCAL_NAME
7717 -- [, [External =>] EXTERNAL_SYMBOL]
7718 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7719 -- [, [Mechanism =>] MECHANISM]
7720 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7722 -- EXTERNAL_SYMBOL ::=
7724 -- | static_string_EXPRESSION
7726 -- PARAMETER_TYPES ::=
7728 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7730 -- TYPE_DESIGNATOR ::=
7732 -- | subtype_Name ' Access
7736 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7738 -- MECHANISM_ASSOCIATION ::=
7739 -- [formal_parameter_NAME =>] MECHANISM_NAME
7741 -- MECHANISM_NAME ::=
7744 -- | Descriptor [([Class =>] CLASS_NAME)]
7746 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7748 when Pragma_Import_Procedure => Import_Procedure : declare
7749 Args : Args_List (1 .. 5);
7750 Names : constant Name_List (1 .. 5) := (
7753 Name_Parameter_Types,
7755 Name_First_Optional_Parameter);
7757 Internal : Node_Id renames Args (1);
7758 External : Node_Id renames Args (2);
7759 Parameter_Types : Node_Id renames Args (3);
7760 Mechanism : Node_Id renames Args (4);
7761 First_Optional_Parameter : Node_Id renames Args (5);
7765 Gather_Associations (Names, Args);
7766 Process_Extended_Import_Export_Subprogram_Pragma (
7767 Arg_Internal => Internal,
7768 Arg_External => External,
7769 Arg_Parameter_Types => Parameter_Types,
7770 Arg_Mechanism => Mechanism,
7771 Arg_First_Optional_Parameter => First_Optional_Parameter);
7772 end Import_Procedure;
7774 -----------------------------
7775 -- Import_Valued_Procedure --
7776 -----------------------------
7778 -- pragma Import_Valued_Procedure (
7779 -- [Internal =>] LOCAL_NAME
7780 -- [, [External =>] EXTERNAL_SYMBOL]
7781 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7782 -- [, [Mechanism =>] MECHANISM]
7783 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7785 -- EXTERNAL_SYMBOL ::=
7787 -- | static_string_EXPRESSION
7789 -- PARAMETER_TYPES ::=
7791 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7793 -- TYPE_DESIGNATOR ::=
7795 -- | subtype_Name ' Access
7799 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7801 -- MECHANISM_ASSOCIATION ::=
7802 -- [formal_parameter_NAME =>] MECHANISM_NAME
7804 -- MECHANISM_NAME ::=
7807 -- | Descriptor [([Class =>] CLASS_NAME)]
7809 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7811 when Pragma_Import_Valued_Procedure =>
7812 Import_Valued_Procedure : declare
7813 Args : Args_List (1 .. 5);
7814 Names : constant Name_List (1 .. 5) := (
7817 Name_Parameter_Types,
7819 Name_First_Optional_Parameter);
7821 Internal : Node_Id renames Args (1);
7822 External : Node_Id renames Args (2);
7823 Parameter_Types : Node_Id renames Args (3);
7824 Mechanism : Node_Id renames Args (4);
7825 First_Optional_Parameter : Node_Id renames Args (5);
7829 Gather_Associations (Names, Args);
7830 Process_Extended_Import_Export_Subprogram_Pragma (
7831 Arg_Internal => Internal,
7832 Arg_External => External,
7833 Arg_Parameter_Types => Parameter_Types,
7834 Arg_Mechanism => Mechanism,
7835 Arg_First_Optional_Parameter => First_Optional_Parameter);
7836 end Import_Valued_Procedure;
7838 ------------------------
7839 -- Initialize_Scalars --
7840 ------------------------
7842 -- pragma Initialize_Scalars;
7844 when Pragma_Initialize_Scalars =>
7846 Check_Arg_Count (0);
7847 Check_Valid_Configuration_Pragma;
7848 Check_Restriction (No_Initialize_Scalars, N);
7850 if not Restriction_Active (No_Initialize_Scalars) then
7851 Init_Or_Norm_Scalars := True;
7852 Initialize_Scalars := True;
7859 -- pragma Inline ( NAME {, NAME} );
7861 when Pragma_Inline =>
7863 -- Pragma is active if inlining option is active
7865 Process_Inline (Inline_Active);
7871 -- pragma Inline_Always ( NAME {, NAME} );
7873 when Pragma_Inline_Always =>
7875 Process_Inline (True);
7877 --------------------
7878 -- Inline_Generic --
7879 --------------------
7881 -- pragma Inline_Generic (NAME {, NAME});
7883 when Pragma_Inline_Generic =>
7885 Process_Generic_List;
7887 ----------------------
7888 -- Inspection_Point --
7889 ----------------------
7891 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
7893 when Pragma_Inspection_Point => Inspection_Point : declare
7898 if Arg_Count > 0 then
7901 Exp := Expression (Arg);
7904 if not Is_Entity_Name (Exp)
7905 or else not Is_Object (Entity (Exp))
7907 Error_Pragma_Arg ("object name required", Arg);
7914 end Inspection_Point;
7920 -- pragma Interface (
7921 -- [ Convention =>] convention_IDENTIFIER,
7922 -- [ Entity =>] local_NAME
7923 -- [, [External_Name =>] static_string_EXPRESSION ]
7924 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7926 when Pragma_Interface =>
7933 Check_At_Least_N_Arguments (2);
7934 Check_At_Most_N_Arguments (4);
7935 Process_Import_Or_Interface;
7937 --------------------
7938 -- Interface_Name --
7939 --------------------
7941 -- pragma Interface_Name (
7942 -- [ Entity =>] local_NAME
7943 -- [,[External_Name =>] static_string_EXPRESSION ]
7944 -- [,[Link_Name =>] static_string_EXPRESSION ]);
7946 when Pragma_Interface_Name => Interface_Name : declare
7955 ((Name_Entity, Name_External_Name, Name_Link_Name));
7956 Check_At_Least_N_Arguments (2);
7957 Check_At_Most_N_Arguments (3);
7958 Id := Expression (Arg1);
7961 if not Is_Entity_Name (Id) then
7963 ("first argument for pragma% must be entity name", Arg1);
7964 elsif Etype (Id) = Any_Type then
7967 Def_Id := Entity (Id);
7970 -- Special DEC-compatible processing for the object case, forces
7971 -- object to be imported.
7973 if Ekind (Def_Id) = E_Variable then
7974 Kill_Size_Check_Code (Def_Id);
7975 Note_Possible_Modification (Id, Sure => False);
7977 -- Initialization is not allowed for imported variable
7979 if Present (Expression (Parent (Def_Id)))
7980 and then Comes_From_Source (Expression (Parent (Def_Id)))
7982 Error_Msg_Sloc := Sloc (Def_Id);
7984 ("no initialization allowed for declaration of& #",
7988 -- For compatibility, support VADS usage of providing both
7989 -- pragmas Interface and Interface_Name to obtain the effect
7990 -- of a single Import pragma.
7992 if Is_Imported (Def_Id)
7993 and then Present (First_Rep_Item (Def_Id))
7994 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
7996 Pragma_Name (First_Rep_Item (Def_Id)) = Name_Interface
8000 Set_Imported (Def_Id);
8003 Set_Is_Public (Def_Id);
8004 Process_Interface_Name (Def_Id, Arg2, Arg3);
8007 -- Otherwise must be subprogram
8009 elsif not Is_Subprogram (Def_Id) then
8011 ("argument of pragma% is not subprogram", Arg1);
8014 Check_At_Most_N_Arguments (3);
8018 -- Loop through homonyms
8021 Def_Id := Get_Base_Subprogram (Hom_Id);
8023 if Is_Imported (Def_Id) then
8024 Process_Interface_Name (Def_Id, Arg2, Arg3);
8028 Hom_Id := Homonym (Hom_Id);
8030 exit when No (Hom_Id)
8031 or else Scope (Hom_Id) /= Current_Scope;
8036 ("argument of pragma% is not imported subprogram",
8042 -----------------------
8043 -- Interrupt_Handler --
8044 -----------------------
8046 -- pragma Interrupt_Handler (handler_NAME);
8048 when Pragma_Interrupt_Handler =>
8049 Check_Ada_83_Warning;
8050 Check_Arg_Count (1);
8051 Check_No_Identifiers;
8053 if No_Run_Time_Mode then
8054 Error_Msg_CRT ("Interrupt_Handler pragma", N);
8056 Check_Interrupt_Or_Attach_Handler;
8057 Process_Interrupt_Or_Attach_Handler;
8060 ------------------------
8061 -- Interrupt_Priority --
8062 ------------------------
8064 -- pragma Interrupt_Priority [(EXPRESSION)];
8066 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
8067 P : constant Node_Id := Parent (N);
8071 Check_Ada_83_Warning;
8073 if Arg_Count /= 0 then
8074 Arg := Expression (Arg1);
8075 Check_Arg_Count (1);
8076 Check_No_Identifiers;
8078 -- The expression must be analyzed in the special manner
8079 -- described in "Handling of Default and Per-Object
8080 -- Expressions" in sem.ads.
8082 Preanalyze_Spec_Expression (Arg, RTE (RE_Interrupt_Priority));
8085 if Nkind (P) /= N_Task_Definition
8086 and then Nkind (P) /= N_Protected_Definition
8091 elsif Has_Priority_Pragma (P) then
8092 Error_Pragma ("duplicate pragma% not allowed");
8095 Set_Has_Priority_Pragma (P, True);
8096 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
8098 end Interrupt_Priority;
8100 ---------------------
8101 -- Interrupt_State --
8102 ---------------------
8104 -- pragma Interrupt_State (
8105 -- [Name =>] INTERRUPT_ID,
8106 -- [State =>] INTERRUPT_STATE);
8108 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
8109 -- INTERRUPT_STATE => System | Runtime | User
8111 -- Note: if the interrupt id is given as an identifier, then
8112 -- it must be one of the identifiers in Ada.Interrupts.Names.
8113 -- Otherwise it is given as a static integer expression which
8114 -- must be in the range of Ada.Interrupts.Interrupt_ID.
8116 when Pragma_Interrupt_State => Interrupt_State : declare
8118 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
8119 -- This is the entity Ada.Interrupts.Interrupt_ID;
8121 State_Type : Character;
8122 -- Set to 's'/'r'/'u' for System/Runtime/User
8125 -- Index to entry in Interrupt_States table
8128 -- Value of interrupt
8130 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
8131 -- The first argument to the pragma
8133 Int_Ent : Entity_Id;
8134 -- Interrupt entity in Ada.Interrupts.Names
8138 Check_Arg_Order ((Name_Name, Name_State));
8139 Check_Arg_Count (2);
8141 Check_Optional_Identifier (Arg1, Name_Name);
8142 Check_Optional_Identifier (Arg2, Name_State);
8143 Check_Arg_Is_Identifier (Arg2);
8145 -- First argument is identifier
8147 if Nkind (Arg1X) = N_Identifier then
8149 -- Search list of names in Ada.Interrupts.Names
8151 Int_Ent := First_Entity (RTE (RE_Names));
8153 if No (Int_Ent) then
8154 Error_Pragma_Arg ("invalid interrupt name", Arg1);
8156 elsif Chars (Int_Ent) = Chars (Arg1X) then
8157 Int_Val := Expr_Value (Constant_Value (Int_Ent));
8161 Next_Entity (Int_Ent);
8164 -- First argument is not an identifier, so it must be a
8165 -- static expression of type Ada.Interrupts.Interrupt_ID.
8168 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
8169 Int_Val := Expr_Value (Arg1X);
8171 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
8173 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
8176 ("value not in range of type " &
8177 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
8183 case Chars (Get_Pragma_Arg (Arg2)) is
8184 when Name_Runtime => State_Type := 'r';
8185 when Name_System => State_Type := 's';
8186 when Name_User => State_Type := 'u';
8189 Error_Pragma_Arg ("invalid interrupt state", Arg2);
8192 -- Check if entry is already stored
8194 IST_Num := Interrupt_States.First;
8196 -- If entry not found, add it
8198 if IST_Num > Interrupt_States.Last then
8199 Interrupt_States.Append
8200 ((Interrupt_Number => UI_To_Int (Int_Val),
8201 Interrupt_State => State_Type,
8202 Pragma_Loc => Loc));
8205 -- Case of entry for the same entry
8207 elsif Int_Val = Interrupt_States.Table (IST_Num).
8210 -- If state matches, done, no need to make redundant entry
8213 State_Type = Interrupt_States.Table (IST_Num).
8216 -- Otherwise if state does not match, error
8219 Interrupt_States.Table (IST_Num).Pragma_Loc;
8221 ("state conflicts with that given #", Arg2);
8225 IST_Num := IST_Num + 1;
8227 end Interrupt_State;
8229 ----------------------
8230 -- Java_Constructor --
8231 ----------------------
8233 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
8235 -- Also handles pragma CIL_Constructor
8237 when Pragma_CIL_Constructor | Pragma_Java_Constructor =>
8238 Java_Constructor : declare
8242 Convention : Convention_Id;
8246 Check_Arg_Count (1);
8247 Check_Optional_Identifier (Arg1, Name_Entity);
8248 Check_Arg_Is_Local_Name (Arg1);
8250 Id := Expression (Arg1);
8251 Find_Program_Unit_Name (Id);
8253 -- If we did not find the name, we are done
8255 if Etype (Id) = Any_Type then
8260 when Pragma_CIL_Constructor => Convention := Convention_CIL;
8261 when Pragma_Java_Constructor => Convention := Convention_Java;
8262 when others => null;
8265 Hom_Id := Entity (Id);
8267 -- Loop through homonyms
8270 Def_Id := Get_Base_Subprogram (Hom_Id);
8272 -- The constructor is required to be a function returning an
8273 -- access type whose designated type has convention Java/CIL.
8275 if Ekind (Def_Id) = E_Function
8277 (Is_Value_Type (Etype (Def_Id))
8279 (Ekind (Etype (Def_Id)) in Access_Kind
8282 (Designated_Type (Etype (Def_Id))) = Convention
8285 (Root_Type (Designated_Type (Etype (Def_Id)))) =
8288 Set_Is_Constructor (Def_Id);
8289 Set_Convention (Def_Id, Convention);
8290 Set_Is_Imported (Def_Id);
8293 if Convention = Convention_Java then
8295 ("pragma% requires function returning a " &
8296 "'Java access type", Arg1);
8298 pragma Assert (Convention = Convention_CIL);
8300 ("pragma% requires function returning a " &
8301 "'CIL access type", Arg1);
8305 Hom_Id := Homonym (Hom_Id);
8307 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
8309 end Java_Constructor;
8311 ----------------------
8312 -- Java_Interface --
8313 ----------------------
8315 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
8317 when Pragma_Java_Interface => Java_Interface : declare
8323 Check_Arg_Count (1);
8324 Check_Optional_Identifier (Arg1, Name_Entity);
8325 Check_Arg_Is_Local_Name (Arg1);
8327 Arg := Expression (Arg1);
8330 if Etype (Arg) = Any_Type then
8334 if not Is_Entity_Name (Arg)
8335 or else not Is_Type (Entity (Arg))
8337 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
8340 Typ := Underlying_Type (Entity (Arg));
8342 -- For now we simply check some of the semantic constraints
8343 -- on the type. This currently leaves out some restrictions
8344 -- on interface types, namely that the parent type must be
8345 -- java.lang.Object.Typ and that all primitives of the type
8346 -- should be declared abstract. ???
8348 if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then
8349 Error_Pragma_Arg ("pragma% requires an abstract "
8350 & "tagged type", Arg1);
8352 elsif not Has_Discriminants (Typ)
8353 or else Ekind (Etype (First_Discriminant (Typ)))
8354 /= E_Anonymous_Access_Type
8356 not Is_Class_Wide_Type
8357 (Designated_Type (Etype (First_Discriminant (Typ))))
8360 ("type must have a class-wide access discriminant", Arg1);
8368 -- pragma Keep_Names ([On => ] local_NAME);
8370 when Pragma_Keep_Names => Keep_Names : declare
8375 Check_Arg_Count (1);
8376 Check_Optional_Identifier (Arg1, Name_On);
8377 Check_Arg_Is_Local_Name (Arg1);
8379 Arg := Expression (Arg1);
8382 if Etype (Arg) = Any_Type then
8386 if not Is_Entity_Name (Arg)
8387 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
8390 ("pragma% requires a local enumeration type", Arg1);
8393 Set_Discard_Names (Entity (Arg), False);
8400 -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
8402 when Pragma_License =>
8404 Check_Arg_Count (1);
8405 Check_No_Identifiers;
8406 Check_Valid_Configuration_Pragma;
8407 Check_Arg_Is_Identifier (Arg1);
8410 Sind : constant Source_File_Index :=
8411 Source_Index (Current_Sem_Unit);
8414 case Chars (Get_Pragma_Arg (Arg1)) is
8416 Set_License (Sind, GPL);
8418 when Name_Modified_GPL =>
8419 Set_License (Sind, Modified_GPL);
8421 when Name_Restricted =>
8422 Set_License (Sind, Restricted);
8424 when Name_Unrestricted =>
8425 Set_License (Sind, Unrestricted);
8428 Error_Pragma_Arg ("invalid license name", Arg1);
8436 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
8438 when Pragma_Link_With => Link_With : declare
8444 if Operating_Mode = Generate_Code
8445 and then In_Extended_Main_Source_Unit (N)
8447 Check_At_Least_N_Arguments (1);
8448 Check_No_Identifiers;
8449 Check_Is_In_Decl_Part_Or_Package_Spec;
8450 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8454 while Present (Arg) loop
8455 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8457 -- Store argument, converting sequences of spaces
8458 -- to a single null character (this is one of the
8459 -- differences in processing between Link_With
8460 -- and Linker_Options).
8463 C : constant Char_Code := Get_Char_Code (' ');
8464 S : constant String_Id :=
8465 Strval (Expr_Value_S (Expression (Arg)));
8466 L : constant Nat := String_Length (S);
8469 procedure Skip_Spaces;
8470 -- Advance F past any spaces
8476 procedure Skip_Spaces is
8478 while F <= L and then Get_String_Char (S, F) = C loop
8483 -- Start of processing for Arg_Store
8486 Skip_Spaces; -- skip leading spaces
8488 -- Loop through characters, changing any embedded
8489 -- sequence of spaces to a single null character
8490 -- (this is how Link_With/Linker_Options differ)
8493 if Get_String_Char (S, F) = C then
8496 Store_String_Char (ASCII.NUL);
8499 Store_String_Char (Get_String_Char (S, F));
8507 if Present (Arg) then
8508 Store_String_Char (ASCII.NUL);
8512 Store_Linker_Option_String (End_String);
8520 -- pragma Linker_Alias (
8521 -- [Entity =>] LOCAL_NAME
8522 -- [Target =>] static_string_EXPRESSION);
8524 when Pragma_Linker_Alias =>
8526 Check_Arg_Order ((Name_Entity, Name_Target));
8527 Check_Arg_Count (2);
8528 Check_Optional_Identifier (Arg1, Name_Entity);
8529 Check_Optional_Identifier (Arg2, Name_Target);
8530 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8531 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8533 -- The only processing required is to link this item on to the
8534 -- list of rep items for the given entity. This is accomplished
8535 -- by the call to Rep_Item_Too_Late (when no error is detected
8536 -- and False is returned).
8538 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8541 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8544 ------------------------
8545 -- Linker_Constructor --
8546 ------------------------
8548 -- pragma Linker_Constructor (procedure_LOCAL_NAME);
8550 -- Code is shared with Linker_Destructor
8552 -----------------------
8553 -- Linker_Destructor --
8554 -----------------------
8556 -- pragma Linker_Destructor (procedure_LOCAL_NAME);
8558 when Pragma_Linker_Constructor |
8559 Pragma_Linker_Destructor =>
8560 Linker_Constructor : declare
8566 Check_Arg_Count (1);
8567 Check_No_Identifiers;
8568 Check_Arg_Is_Local_Name (Arg1);
8569 Arg1_X := Expression (Arg1);
8571 Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
8573 if not Is_Library_Level_Entity (Proc) then
8575 ("argument for pragma% must be library level entity", Arg1);
8578 -- The only processing required is to link this item on to the
8579 -- list of rep items for the given entity. This is accomplished
8580 -- by the call to Rep_Item_Too_Late (when no error is detected
8581 -- and False is returned).
8583 if Rep_Item_Too_Late (Proc, N) then
8586 Set_Has_Gigi_Rep_Item (Proc);
8588 end Linker_Constructor;
8590 --------------------
8591 -- Linker_Options --
8592 --------------------
8594 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
8596 when Pragma_Linker_Options => Linker_Options : declare
8600 Check_Ada_83_Warning;
8601 Check_No_Identifiers;
8602 Check_Arg_Count (1);
8603 Check_Is_In_Decl_Part_Or_Package_Spec;
8604 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8605 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
8608 while Present (Arg) loop
8609 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8610 Store_String_Char (ASCII.NUL);
8611 Store_String_Chars (Strval (Expr_Value_S (Expression (Arg))));
8615 if Operating_Mode = Generate_Code
8616 and then In_Extended_Main_Source_Unit (N)
8618 Store_Linker_Option_String (End_String);
8622 --------------------
8623 -- Linker_Section --
8624 --------------------
8626 -- pragma Linker_Section (
8627 -- [Entity =>] LOCAL_NAME
8628 -- [Section =>] static_string_EXPRESSION);
8630 when Pragma_Linker_Section =>
8632 Check_Arg_Order ((Name_Entity, Name_Section));
8633 Check_Arg_Count (2);
8634 Check_Optional_Identifier (Arg1, Name_Entity);
8635 Check_Optional_Identifier (Arg2, Name_Section);
8636 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8637 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8639 -- This pragma applies only to objects
8641 if not Is_Object (Entity (Expression (Arg1))) then
8642 Error_Pragma_Arg ("pragma% applies only to objects", Arg1);
8645 -- The only processing required is to link this item on to the
8646 -- list of rep items for the given entity. This is accomplished
8647 -- by the call to Rep_Item_Too_Late (when no error is detected
8648 -- and False is returned).
8650 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8653 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8660 -- pragma List (On | Off)
8662 -- There is nothing to do here, since we did all the processing
8663 -- for this pragma in Par.Prag (so that it works properly even in
8664 -- syntax only mode)
8669 --------------------
8670 -- Locking_Policy --
8671 --------------------
8673 -- pragma Locking_Policy (policy_IDENTIFIER);
8675 when Pragma_Locking_Policy => declare
8679 Check_Ada_83_Warning;
8680 Check_Arg_Count (1);
8681 Check_No_Identifiers;
8682 Check_Arg_Is_Locking_Policy (Arg1);
8683 Check_Valid_Configuration_Pragma;
8684 Get_Name_String (Chars (Expression (Arg1)));
8685 LP := Fold_Upper (Name_Buffer (1));
8687 if Locking_Policy /= ' '
8688 and then Locking_Policy /= LP
8690 Error_Msg_Sloc := Locking_Policy_Sloc;
8691 Error_Pragma ("locking policy incompatible with policy#");
8693 -- Set new policy, but always preserve System_Location since
8694 -- we like the error message with the run time name.
8697 Locking_Policy := LP;
8699 if Locking_Policy_Sloc /= System_Location then
8700 Locking_Policy_Sloc := Loc;
8709 -- pragma Long_Float (D_Float | G_Float);
8711 when Pragma_Long_Float =>
8713 Check_Valid_Configuration_Pragma;
8714 Check_Arg_Count (1);
8715 Check_No_Identifier (Arg1);
8716 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
8718 if not OpenVMS_On_Target then
8719 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
8724 if Chars (Expression (Arg1)) = Name_D_Float then
8725 if Opt.Float_Format_Long = 'G' then
8726 Error_Pragma ("G_Float previously specified");
8729 Opt.Float_Format_Long := 'D';
8731 -- G_Float case (this is the default, does not need overriding)
8734 if Opt.Float_Format_Long = 'D' then
8735 Error_Pragma ("D_Float previously specified");
8738 Opt.Float_Format_Long := 'G';
8741 Set_Standard_Fpt_Formats;
8743 -----------------------
8744 -- Machine_Attribute --
8745 -----------------------
8747 -- pragma Machine_Attribute (
8748 -- [Entity =>] LOCAL_NAME,
8749 -- [Attribute_Name =>] static_string_EXPRESSION
8750 -- [, [Info =>] static_string_EXPRESSION] );
8752 when Pragma_Machine_Attribute => Machine_Attribute : declare
8757 Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
8759 if Arg_Count = 3 then
8760 Check_Optional_Identifier (Arg3, Name_Info);
8761 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
8763 Check_Arg_Count (2);
8766 Check_Optional_Identifier (Arg1, Name_Entity);
8767 Check_Optional_Identifier (Arg2, Name_Attribute_Name);
8768 Check_Arg_Is_Local_Name (Arg1);
8769 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8770 Def_Id := Entity (Expression (Arg1));
8772 if Is_Access_Type (Def_Id) then
8773 Def_Id := Designated_Type (Def_Id);
8776 if Rep_Item_Too_Early (Def_Id, N) then
8780 Def_Id := Underlying_Type (Def_Id);
8782 -- The only processing required is to link this item on to the
8783 -- list of rep items for the given entity. This is accomplished
8784 -- by the call to Rep_Item_Too_Late (when no error is detected
8785 -- and False is returned).
8787 if Rep_Item_Too_Late (Def_Id, N) then
8790 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8792 end Machine_Attribute;
8799 -- (MAIN_OPTION [, MAIN_OPTION]);
8802 -- [STACK_SIZE =>] static_integer_EXPRESSION
8803 -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION
8804 -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION
8806 when Pragma_Main => Main : declare
8807 Args : Args_List (1 .. 3);
8808 Names : constant Name_List (1 .. 3) := (
8810 Name_Task_Stack_Size_Default,
8811 Name_Time_Slicing_Enabled);
8817 Gather_Associations (Names, Args);
8819 for J in 1 .. 2 loop
8820 if Present (Args (J)) then
8821 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8825 if Present (Args (3)) then
8826 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
8830 while Present (Nod) loop
8831 if Nkind (Nod) = N_Pragma
8832 and then Pragma_Name (Nod) = Name_Main
8834 Error_Msg_Name_1 := Pname;
8835 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8846 -- pragma Main_Storage
8847 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
8849 -- MAIN_STORAGE_OPTION ::=
8850 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
8851 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
8853 when Pragma_Main_Storage => Main_Storage : declare
8854 Args : Args_List (1 .. 2);
8855 Names : constant Name_List (1 .. 2) := (
8856 Name_Working_Storage,
8863 Gather_Associations (Names, Args);
8865 for J in 1 .. 2 loop
8866 if Present (Args (J)) then
8867 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8871 Check_In_Main_Program;
8874 while Present (Nod) loop
8875 if Nkind (Nod) = N_Pragma
8876 and then Pragma_Name (Nod) = Name_Main_Storage
8878 Error_Msg_Name_1 := Pname;
8879 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8890 -- pragma Memory_Size (NUMERIC_LITERAL)
8892 when Pragma_Memory_Size =>
8895 -- Memory size is simply ignored
8897 Check_No_Identifiers;
8898 Check_Arg_Count (1);
8899 Check_Arg_Is_Integer_Literal (Arg1);
8907 -- The only correct use of this pragma is on its own in a file, in
8908 -- which case it is specially processed (see Gnat1drv.Check_Bad_Body
8909 -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to
8910 -- check for a file containing nothing but a No_Body pragma). If we
8911 -- attempt to process it during normal semantics processing, it means
8912 -- it was misplaced.
8914 when Pragma_No_Body =>
8922 -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
8924 when Pragma_No_Return => No_Return : declare
8932 Check_At_Least_N_Arguments (1);
8934 -- Loop through arguments of pragma
8937 while Present (Arg) loop
8938 Check_Arg_Is_Local_Name (Arg);
8939 Id := Expression (Arg);
8942 if not Is_Entity_Name (Id) then
8943 Error_Pragma_Arg ("entity name required", Arg);
8946 if Etype (Id) = Any_Type then
8950 -- Loop to find matching procedures
8955 and then Scope (E) = Current_Scope
8957 if Ekind (E) = E_Procedure
8958 or else Ekind (E) = E_Generic_Procedure
8962 -- Set flag on any alias as well
8964 if Is_Overloadable (E) and then Present (Alias (E)) then
8965 Set_No_Return (Alias (E));
8975 Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
8986 -- pragma No_Run_Time;
8988 -- Note: this pragma is retained for backwards compatibility.
8989 -- See body of Rtsfind for full details on its handling.
8991 when Pragma_No_Run_Time =>
8993 Check_Valid_Configuration_Pragma;
8994 Check_Arg_Count (0);
8996 No_Run_Time_Mode := True;
8997 Configurable_Run_Time_Mode := True;
8999 -- Set Duration to 32 bits if word size is 32
9001 if Ttypes.System_Word_Size = 32 then
9002 Duration_32_Bits_On_Target := True;
9005 -- Set appropriate restrictions
9007 Set_Restriction (No_Finalization, N);
9008 Set_Restriction (No_Exception_Handlers, N);
9009 Set_Restriction (Max_Tasks, N, 0);
9010 Set_Restriction (No_Tasking, N);
9012 ------------------------
9013 -- No_Strict_Aliasing --
9014 ------------------------
9016 -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
9018 when Pragma_No_Strict_Aliasing => No_Strict_Aliasing : declare
9023 Check_At_Most_N_Arguments (1);
9025 if Arg_Count = 0 then
9026 Check_Valid_Configuration_Pragma;
9027 Opt.No_Strict_Aliasing := True;
9030 Check_Optional_Identifier (Arg2, Name_Entity);
9031 Check_Arg_Is_Local_Name (Arg1);
9032 E_Id := Entity (Expression (Arg1));
9034 if E_Id = Any_Type then
9036 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
9037 Error_Pragma_Arg ("pragma% requires access type", Arg1);
9040 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
9042 end No_Strict_Aliasing;
9044 -----------------------
9045 -- Normalize_Scalars --
9046 -----------------------
9048 -- pragma Normalize_Scalars;
9050 when Pragma_Normalize_Scalars =>
9051 Check_Ada_83_Warning;
9052 Check_Arg_Count (0);
9053 Check_Valid_Configuration_Pragma;
9054 Normalize_Scalars := True;
9055 Init_Or_Norm_Scalars := True;
9061 -- pragma Obsolescent [(
9062 -- [Entity => NAME,]
9063 -- [(static_string_EXPRESSION [, Ada_05])];
9065 when Pragma_Obsolescent => Obsolescent : declare
9069 procedure Set_Obsolescent (E : Entity_Id);
9070 -- Given an entity Ent, mark it as obsolescent if appropriate
9072 ---------------------
9073 -- Set_Obsolescent --
9074 ---------------------
9076 procedure Set_Obsolescent (E : Entity_Id) is
9085 -- Entity name was given
9087 if Present (Ename) then
9089 -- If entity name matches, we are fine
9090 -- Save entity in pragma argument, for ASIS use.
9092 if Chars (Ename) = Chars (Ent) then
9093 Set_Entity (Ename, Ent);
9094 Generate_Reference (Ent, Ename);
9096 -- If entity name does not match, only possibility is an
9097 -- enumeration literal from an enumeration type declaration.
9099 elsif Ekind (Ent) /= E_Enumeration_Type then
9101 ("pragma % entity name does not match declaration");
9104 Ent := First_Literal (E);
9108 ("pragma % entity name does not match any " &
9109 "enumeration literal");
9111 elsif Chars (Ent) = Chars (Ename) then
9112 Set_Entity (Ename, Ent);
9113 Generate_Reference (Ent, Ename);
9117 Ent := Next_Literal (Ent);
9123 -- Ent points to entity to be marked
9125 if Arg_Count >= 1 then
9127 -- Deal with static string argument
9129 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
9130 S := Strval (Expression (Arg1));
9132 for J in 1 .. String_Length (S) loop
9133 if not In_Character_Range (Get_String_Char (S, J)) then
9135 ("pragma% argument does not allow wide characters",
9140 Obsolescent_Warnings.Append
9141 ((Ent => Ent, Msg => Strval (Expression (Arg1))));
9143 -- Check for Ada_05 parameter
9145 if Arg_Count /= 1 then
9146 Check_Arg_Count (2);
9149 Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
9152 Check_Arg_Is_Identifier (Argx);
9154 if Chars (Argx) /= Name_Ada_05 then
9155 Error_Msg_Name_2 := Name_Ada_05;
9157 ("only allowed argument for pragma% is %", Argx);
9160 if Ada_Version_Explicit < Ada_05
9161 or else not Warn_On_Ada_2005_Compatibility
9169 -- Set flag if pragma active
9172 Set_Is_Obsolescent (Ent);
9176 end Set_Obsolescent;
9178 -- Start of processing for pragma Obsolescent
9183 Check_At_Most_N_Arguments (3);
9185 -- See if first argument specifies an entity name
9188 and then Chars (Arg1) = Name_Entity
9190 Ename := Get_Pragma_Arg (Arg1);
9192 if Nkind (Ename) /= N_Character_Literal
9194 Nkind (Ename) /= N_Identifier
9196 Nkind (Ename) /= N_Operator_Symbol
9198 Error_Pragma_Arg ("entity name expected for pragma%", Arg1);
9201 -- Eliminate first argument, so we can share processing
9205 Arg_Count := Arg_Count - 1;
9207 -- No Entity name argument given
9213 Check_No_Identifiers;
9215 -- Get immediately preceding declaration
9218 while Present (Decl) and then Nkind (Decl) = N_Pragma loop
9222 -- Cases where we do not follow anything other than another pragma
9226 -- First case: library level compilation unit declaration with
9227 -- the pragma immediately following the declaration.
9229 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
9231 (Defining_Entity (Unit (Parent (Parent (N)))));
9234 -- Case 2: library unit placement for package
9238 Ent : constant Entity_Id := Find_Lib_Unit_Name;
9240 if Is_Package_Or_Generic_Package (Ent) then
9241 Set_Obsolescent (Ent);
9247 -- Cases where we must follow a declaration
9250 if Nkind (Decl) not in N_Declaration
9251 and then Nkind (Decl) not in N_Later_Decl_Item
9252 and then Nkind (Decl) not in N_Generic_Declaration
9255 ("pragma% misplaced, " &
9256 "must immediately follow a declaration");
9259 Set_Obsolescent (Defining_Entity (Decl));
9269 -- pragma Optimize (Time | Space | Off);
9271 -- The actual check for optimize is done in Gigi. Note that this
9272 -- pragma does not actually change the optimization setting, it
9273 -- simply checks that it is consistent with the pragma.
9275 when Pragma_Optimize =>
9276 Check_No_Identifiers;
9277 Check_Arg_Count (1);
9278 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
9280 ------------------------
9281 -- Optimize_Alignment --
9282 ------------------------
9284 -- pragma Optimize_Alignment (Time | Space | Off);
9286 when Pragma_Optimize_Alignment =>
9288 Check_No_Identifiers;
9289 Check_Arg_Count (1);
9290 Check_Valid_Configuration_Pragma;
9293 Nam : constant Name_Id := Chars (Get_Pragma_Arg (Arg1));
9297 Opt.Optimize_Alignment := 'T';
9299 Opt.Optimize_Alignment := 'S';
9301 Opt.Optimize_Alignment := 'O';
9303 Error_Pragma_Arg ("invalid argument for pragma%", Arg1);
9307 -- Set indication that mode is set locally. If we are in fact in a
9308 -- configuration pragma file, this setting is harmless since the
9309 -- switch will get reset anyway at the start of each unit.
9311 Optimize_Alignment_Local := True;
9317 -- pragma Pack (first_subtype_LOCAL_NAME);
9319 when Pragma_Pack => Pack : declare
9320 Assoc : constant Node_Id := Arg1;
9325 Check_No_Identifiers;
9326 Check_Arg_Count (1);
9327 Check_Arg_Is_Local_Name (Arg1);
9329 Type_Id := Expression (Assoc);
9330 Find_Type (Type_Id);
9331 Typ := Entity (Type_Id);
9334 or else Rep_Item_Too_Early (Typ, N)
9338 Typ := Underlying_Type (Typ);
9341 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
9342 Error_Pragma ("pragma% must specify array or record type");
9345 Check_First_Subtype (Arg1);
9347 if Has_Pragma_Pack (Typ) then
9348 Error_Pragma ("duplicate pragma%, only one allowed");
9352 elsif Is_Array_Type (Typ) then
9354 -- Pack not allowed for aliased or atomic components
9356 if Has_Aliased_Components (Base_Type (Typ)) then
9358 ("pragma% ignored, cannot pack aliased components?");
9360 elsif Has_Atomic_Components (Typ)
9361 or else Is_Atomic (Component_Type (Typ))
9364 ("?pragma% ignored, cannot pack atomic components");
9367 -- If we had an explicit component size given, then we do not
9368 -- let Pack override this given size. We also give a warning
9369 -- that Pack is being ignored unless we can tell for sure that
9370 -- the Pack would not have had any effect anyway.
9372 if Has_Component_Size_Clause (Typ) then
9373 if Known_Static_RM_Size (Component_Type (Typ))
9375 RM_Size (Component_Type (Typ)) = Component_Size (Typ)
9380 ("?pragma% ignored, explicit component size given");
9383 -- If no prior array component size given, Pack is effective
9386 if not Rep_Item_Too_Late (Typ, N) then
9387 if VM_Target = No_VM then
9388 Set_Is_Packed (Base_Type (Typ));
9389 elsif not GNAT_Mode then
9391 ("?pragma% ignored in this configuration");
9394 Set_Has_Pragma_Pack (Base_Type (Typ));
9395 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9399 -- For record types, the pack is always effective
9401 else pragma Assert (Is_Record_Type (Typ));
9402 if not Rep_Item_Too_Late (Typ, N) then
9403 if VM_Target = No_VM then
9404 Set_Is_Packed (Base_Type (Typ));
9405 elsif not GNAT_Mode then
9406 Error_Pragma ("?pragma% ignored in this configuration");
9409 Set_Has_Pragma_Pack (Base_Type (Typ));
9410 Set_Has_Non_Standard_Rep (Base_Type (Typ));
9421 -- There is nothing to do here, since we did all the processing
9422 -- for this pragma in Par.Prag (so that it works properly even in
9423 -- syntax only mode)
9432 -- pragma Passive [(PASSIVE_FORM)];
9434 -- PASSIVE_FORM ::= Semaphore | No
9436 when Pragma_Passive =>
9439 if Nkind (Parent (N)) /= N_Task_Definition then
9440 Error_Pragma ("pragma% must be within task definition");
9443 if Arg_Count /= 0 then
9444 Check_Arg_Count (1);
9445 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
9448 ----------------------------------
9449 -- Preelaborable_Initialization --
9450 ----------------------------------
9452 -- pragma Preelaborable_Initialization (DIRECT_NAME);
9454 when Pragma_Preelaborable_Initialization => Preelab_Init : declare
9459 Check_Arg_Count (1);
9460 Check_No_Identifiers;
9461 Check_Arg_Is_Identifier (Arg1);
9462 Check_Arg_Is_Local_Name (Arg1);
9463 Check_First_Subtype (Arg1);
9464 Ent := Entity (Expression (Arg1));
9466 if not Is_Private_Type (Ent)
9467 and then not Is_Protected_Type (Ent)
9470 ("pragma % can only be applied to private or protected type",
9474 -- Give an error if the pragma is applied to a protected type that
9475 -- does not qualify (due to having entries, or due to components
9476 -- that do not qualify).
9478 if Is_Protected_Type (Ent)
9479 and then not Has_Preelaborable_Initialization (Ent)
9482 ("protected type & does not have preelaborable " &
9483 "initialization", Ent);
9485 -- Otherwise mark the type as definitely having preelaborable
9489 Set_Known_To_Have_Preelab_Init (Ent);
9492 if Has_Pragma_Preelab_Init (Ent)
9493 and then Warn_On_Redundant_Constructs
9495 Error_Pragma ("?duplicate pragma%!");
9497 Set_Has_Pragma_Preelab_Init (Ent);
9501 --------------------
9502 -- Persistent_BSS --
9503 --------------------
9505 when Pragma_Persistent_BSS => Persistent_BSS : declare
9512 Check_At_Most_N_Arguments (1);
9514 -- Case of application to specific object (one argument)
9516 if Arg_Count = 1 then
9517 Check_Arg_Is_Library_Level_Local_Name (Arg1);
9519 if not Is_Entity_Name (Expression (Arg1))
9521 (Ekind (Entity (Expression (Arg1))) /= E_Variable
9522 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
9524 Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
9527 Ent := Entity (Expression (Arg1));
9528 Decl := Parent (Ent);
9530 if Rep_Item_Too_Late (Ent, N) then
9534 if Present (Expression (Decl)) then
9536 ("object for pragma% cannot have initialization", Arg1);
9539 if not Is_Potentially_Persistent_Type (Etype (Ent)) then
9541 ("object type for pragma% is not potentially persistent",
9546 Make_Linker_Section_Pragma
9547 (Ent, Sloc (N), ".persistent.bss");
9548 Insert_After (N, Prag);
9551 -- Case of use as configuration pragma with no arguments
9554 Check_Valid_Configuration_Pragma;
9555 Persistent_BSS_Mode := True;
9563 -- pragma Polling (ON | OFF);
9565 when Pragma_Polling =>
9567 Check_Arg_Count (1);
9568 Check_No_Identifiers;
9569 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
9570 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
9576 -- pragma Postcondition ([Check =>] Boolean_Expression
9577 -- [,[Message =>] String_Expression]);
9579 when Pragma_Postcondition => Postcondition : declare
9581 pragma Warnings (Off, In_Body);
9585 Check_At_Least_N_Arguments (1);
9586 Check_At_Most_N_Arguments (2);
9587 Check_Optional_Identifier (Arg1, Name_Check);
9589 -- All we need to do here is call the common check procedure,
9590 -- the remainder of the processing is found in Sem_Ch6/Sem_Ch7.
9592 Check_Precondition_Postcondition (In_Body);
9599 -- pragma Precondition ([Check =>] Boolean_Expression
9600 -- [,[Message =>] String_Expression]);
9602 when Pragma_Precondition => Precondition : declare
9607 Check_At_Least_N_Arguments (1);
9608 Check_At_Most_N_Arguments (2);
9609 Check_Optional_Identifier (Arg1, Name_Check);
9611 Check_Precondition_Postcondition (In_Body);
9613 -- If in spec, nothing to do. If in body, then we convert the
9614 -- pragma to pragma Check (Precondition, cond [, msg]). Note we
9615 -- do this whether or not precondition checks are enabled. That
9616 -- works fine since pragma Check will do this check.
9619 if Arg_Count = 2 then
9620 Check_Optional_Identifier (Arg3, Name_Message);
9621 Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String);
9624 Analyze_And_Resolve (Get_Pragma_Arg (Arg1), Standard_Boolean);
9628 Chars => Name_Check,
9629 Pragma_Argument_Associations => New_List (
9630 Make_Pragma_Argument_Association (Loc,
9632 Make_Identifier (Loc,
9633 Chars => Name_Precondition)),
9635 Make_Pragma_Argument_Association (Sloc (Arg1),
9636 Expression => Relocate_Node (Get_Pragma_Arg (Arg1))))));
9638 if Arg_Count = 2 then
9639 Append_To (Pragma_Argument_Associations (N),
9640 Make_Pragma_Argument_Association (Sloc (Arg2),
9641 Expression => Relocate_Node (Get_Pragma_Arg (Arg2))));
9652 -- pragma Preelaborate [(library_unit_NAME)];
9654 -- Set the flag Is_Preelaborated of program unit name entity
9656 when Pragma_Preelaborate => Preelaborate : declare
9657 Pa : constant Node_Id := Parent (N);
9658 Pk : constant Node_Kind := Nkind (Pa);
9662 Check_Ada_83_Warning;
9663 Check_Valid_Library_Unit_Pragma;
9665 if Nkind (N) = N_Null_Statement then
9669 Ent := Find_Lib_Unit_Name;
9671 -- This filters out pragmas inside generic parent then
9672 -- show up inside instantiation
9675 and then not (Pk = N_Package_Specification
9676 and then Present (Generic_Parent (Pa)))
9678 if not Debug_Flag_U then
9679 Set_Is_Preelaborated (Ent);
9680 Set_Suppress_Elaboration_Warnings (Ent);
9685 ---------------------
9686 -- Preelaborate_05 --
9687 ---------------------
9689 -- pragma Preelaborate_05 [(library_unit_NAME)];
9691 -- This pragma is useable only in GNAT_Mode, where it is used like
9692 -- pragma Preelaborate but it is only effective in Ada 2005 mode
9693 -- (otherwise it is ignored). This is used to implement AI-362 which
9694 -- recategorizes some run-time packages in Ada 2005 mode.
9696 when Pragma_Preelaborate_05 => Preelaborate_05 : declare
9701 Check_Valid_Library_Unit_Pragma;
9703 if not GNAT_Mode then
9704 Error_Pragma ("pragma% only available in GNAT mode");
9707 if Nkind (N) = N_Null_Statement then
9711 -- This is one of the few cases where we need to test the value of
9712 -- Ada_Version_Explicit rather than Ada_Version (which is always
9713 -- set to Ada_05 in a predefined unit), we need to know the
9714 -- explicit version set to know if this pragma is active.
9716 if Ada_Version_Explicit >= Ada_05 then
9717 Ent := Find_Lib_Unit_Name;
9718 Set_Is_Preelaborated (Ent);
9719 Set_Suppress_Elaboration_Warnings (Ent);
9721 end Preelaborate_05;
9727 -- pragma Priority (EXPRESSION);
9729 when Pragma_Priority => Priority : declare
9730 P : constant Node_Id := Parent (N);
9734 Check_No_Identifiers;
9735 Check_Arg_Count (1);
9739 if Nkind (P) = N_Subprogram_Body then
9740 Check_In_Main_Program;
9742 Arg := Expression (Arg1);
9743 Analyze_And_Resolve (Arg, Standard_Integer);
9747 if not Is_Static_Expression (Arg) then
9748 Flag_Non_Static_Expr
9749 ("main subprogram priority is not static!", Arg);
9752 -- If constraint error, then we already signalled an error
9754 elsif Raises_Constraint_Error (Arg) then
9757 -- Otherwise check in range
9761 Val : constant Uint := Expr_Value (Arg);
9765 or else Val > Expr_Value (Expression
9766 (Parent (RTE (RE_Max_Priority))))
9769 ("main subprogram priority is out of range", Arg1);
9775 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
9777 -- Load an arbitrary entity from System.Tasking to make sure
9778 -- this package is implicitly with'ed, since we need to have
9779 -- the tasking run-time active for the pragma Priority to have
9783 Discard : Entity_Id;
9784 pragma Warnings (Off, Discard);
9786 Discard := RTE (RE_Task_List);
9789 -- Task or Protected, must be of type Integer
9791 elsif Nkind (P) = N_Protected_Definition
9793 Nkind (P) = N_Task_Definition
9795 Arg := Expression (Arg1);
9797 -- The expression must be analyzed in the special manner
9798 -- described in "Handling of Default and Per-Object
9799 -- Expressions" in sem.ads.
9801 Preanalyze_Spec_Expression (Arg, Standard_Integer);
9803 if not Is_Static_Expression (Arg) then
9804 Check_Restriction (Static_Priorities, Arg);
9807 -- Anything else is incorrect
9813 if Has_Priority_Pragma (P) then
9814 Error_Pragma ("duplicate pragma% not allowed");
9816 Set_Has_Priority_Pragma (P, True);
9818 if Nkind (P) = N_Protected_Definition
9820 Nkind (P) = N_Task_Definition
9822 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9823 -- exp_ch9 should use this ???
9828 -----------------------------------
9829 -- Priority_Specific_Dispatching --
9830 -----------------------------------
9832 -- pragma Priority_Specific_Dispatching (
9833 -- policy_IDENTIFIER,
9834 -- first_priority_EXPRESSION,
9835 -- last_priority_EXPRESSION);
9837 when Pragma_Priority_Specific_Dispatching =>
9838 Priority_Specific_Dispatching : declare
9839 Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
9840 -- This is the entity System.Any_Priority;
9843 Lower_Bound : Node_Id;
9844 Upper_Bound : Node_Id;
9850 Check_Arg_Count (3);
9851 Check_No_Identifiers;
9852 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9853 Check_Valid_Configuration_Pragma;
9854 Get_Name_String (Chars (Expression (Arg1)));
9855 DP := Fold_Upper (Name_Buffer (1));
9857 Lower_Bound := Expression (Arg2);
9858 Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
9859 Lower_Val := Expr_Value (Lower_Bound);
9861 Upper_Bound := Expression (Arg3);
9862 Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
9863 Upper_Val := Expr_Value (Upper_Bound);
9865 -- It is not allowed to use Task_Dispatching_Policy and
9866 -- Priority_Specific_Dispatching in the same partition.
9868 if Task_Dispatching_Policy /= ' ' then
9869 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9871 ("pragma% incompatible with Task_Dispatching_Policy#");
9873 -- Check lower bound in range
9875 elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9877 Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
9880 ("first_priority is out of range", Arg2);
9882 -- Check upper bound in range
9884 elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9886 Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
9889 ("last_priority is out of range", Arg3);
9891 -- Check that the priority range is valid
9893 elsif Lower_Val > Upper_Val then
9895 ("last_priority_expression must be greater than" &
9896 " or equal to first_priority_expression");
9898 -- Store the new policy, but always preserve System_Location since
9899 -- we like the error message with the run-time name.
9902 -- Check overlapping in the priority ranges specified in other
9903 -- Priority_Specific_Dispatching pragmas within the same
9904 -- partition. We can only check those we know about!
9907 Specific_Dispatching.First .. Specific_Dispatching.Last
9909 if Specific_Dispatching.Table (J).First_Priority in
9910 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9911 or else Specific_Dispatching.Table (J).Last_Priority in
9912 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9915 Specific_Dispatching.Table (J).Pragma_Loc;
9917 ("priority range overlaps with "
9918 & "Priority_Specific_Dispatching#");
9922 -- The use of Priority_Specific_Dispatching is incompatible
9923 -- with Task_Dispatching_Policy.
9925 if Task_Dispatching_Policy /= ' ' then
9926 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9928 ("Priority_Specific_Dispatching incompatible "
9929 & "with Task_Dispatching_Policy#");
9932 -- The use of Priority_Specific_Dispatching forces ceiling
9935 if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
9936 Error_Msg_Sloc := Locking_Policy_Sloc;
9938 ("Priority_Specific_Dispatching incompatible "
9939 & "with Locking_Policy#");
9941 -- Set the Ceiling_Locking policy, but preserve System_Location
9942 -- since we like the error message with the run time name.
9945 Locking_Policy := 'C';
9947 if Locking_Policy_Sloc /= System_Location then
9948 Locking_Policy_Sloc := Loc;
9952 -- Add entry in the table
9954 Specific_Dispatching.Append
9955 ((Dispatching_Policy => DP,
9956 First_Priority => UI_To_Int (Lower_Val),
9957 Last_Priority => UI_To_Int (Upper_Val),
9958 Pragma_Loc => Loc));
9960 end Priority_Specific_Dispatching;
9966 -- pragma Profile (profile_IDENTIFIER);
9968 -- profile_IDENTIFIER => Restricted | Ravenscar
9970 when Pragma_Profile =>
9972 Check_Arg_Count (1);
9973 Check_Valid_Configuration_Pragma;
9974 Check_No_Identifiers;
9977 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9979 if Chars (Argx) = Name_Ravenscar then
9980 Set_Ravenscar_Profile (N);
9981 elsif Chars (Argx) = Name_Restricted then
9982 Set_Profile_Restrictions
9983 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
9985 Error_Pragma_Arg ("& is not a valid profile", Argx);
9989 ----------------------
9990 -- Profile_Warnings --
9991 ----------------------
9993 -- pragma Profile_Warnings (profile_IDENTIFIER);
9995 -- profile_IDENTIFIER => Restricted | Ravenscar
9997 when Pragma_Profile_Warnings =>
9999 Check_Arg_Count (1);
10000 Check_Valid_Configuration_Pragma;
10001 Check_No_Identifiers;
10004 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
10006 if Chars (Argx) = Name_Ravenscar then
10007 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
10008 elsif Chars (Argx) = Name_Restricted then
10009 Set_Profile_Restrictions (Restricted, N, Warn => True);
10011 Error_Pragma_Arg ("& is not a valid profile", Argx);
10015 --------------------------
10016 -- Propagate_Exceptions --
10017 --------------------------
10019 -- pragma Propagate_Exceptions;
10021 -- Note: this pragma is obsolete and has no effect
10023 when Pragma_Propagate_Exceptions =>
10025 Check_Arg_Count (0);
10027 if In_Extended_Main_Source_Unit (N) then
10028 Propagate_Exceptions := True;
10035 -- pragma Psect_Object (
10036 -- [Internal =>] LOCAL_NAME,
10037 -- [, [External =>] EXTERNAL_SYMBOL]
10038 -- [, [Size =>] EXTERNAL_SYMBOL]);
10040 when Pragma_Psect_Object | Pragma_Common_Object =>
10041 Psect_Object : declare
10042 Args : Args_List (1 .. 3);
10043 Names : constant Name_List (1 .. 3) := (
10048 Internal : Node_Id renames Args (1);
10049 External : Node_Id renames Args (2);
10050 Size : Node_Id renames Args (3);
10052 Def_Id : Entity_Id;
10054 procedure Check_Too_Long (Arg : Node_Id);
10055 -- Posts message if the argument is an identifier with more
10056 -- than 31 characters, or a string literal with more than
10057 -- 31 characters, and we are operating under VMS
10059 --------------------
10060 -- Check_Too_Long --
10061 --------------------
10063 procedure Check_Too_Long (Arg : Node_Id) is
10064 X : constant Node_Id := Original_Node (Arg);
10067 if Nkind (X) /= N_String_Literal
10069 Nkind (X) /= N_Identifier
10072 ("inappropriate argument for pragma %", Arg);
10075 if OpenVMS_On_Target then
10076 if (Nkind (X) = N_String_Literal
10077 and then String_Length (Strval (X)) > 31)
10079 (Nkind (X) = N_Identifier
10080 and then Length_Of_Name (Chars (X)) > 31)
10083 ("argument for pragma % is longer than 31 characters",
10087 end Check_Too_Long;
10089 -- Start of processing for Common_Object/Psect_Object
10093 Gather_Associations (Names, Args);
10094 Process_Extended_Import_Export_Internal_Arg (Internal);
10096 Def_Id := Entity (Internal);
10098 if Ekind (Def_Id) /= E_Constant
10099 and then Ekind (Def_Id) /= E_Variable
10102 ("pragma% must designate an object", Internal);
10105 Check_Too_Long (Internal);
10107 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
10109 ("cannot use pragma% for imported/exported object",
10113 if Is_Concurrent_Type (Etype (Internal)) then
10115 ("cannot specify pragma % for task/protected object",
10119 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
10121 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
10123 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
10126 if Ekind (Def_Id) = E_Constant then
10128 ("cannot specify pragma % for a constant", Internal);
10131 if Is_Record_Type (Etype (Internal)) then
10137 Ent := First_Entity (Etype (Internal));
10138 while Present (Ent) loop
10139 Decl := Declaration_Node (Ent);
10141 if Ekind (Ent) = E_Component
10142 and then Nkind (Decl) = N_Component_Declaration
10143 and then Present (Expression (Decl))
10144 and then Warn_On_Export_Import
10147 ("?object for pragma % has defaults", Internal);
10157 if Present (Size) then
10158 Check_Too_Long (Size);
10161 if Present (External) then
10162 Check_Arg_Is_External_Name (External);
10163 Check_Too_Long (External);
10166 -- If all error tests pass, link pragma on to the rep item chain
10168 Record_Rep_Item (Def_Id, N);
10175 -- pragma Pure [(library_unit_NAME)];
10177 when Pragma_Pure => Pure : declare
10181 Check_Ada_83_Warning;
10182 Check_Valid_Library_Unit_Pragma;
10184 if Nkind (N) = N_Null_Statement then
10188 Ent := Find_Lib_Unit_Name;
10190 Set_Has_Pragma_Pure (Ent);
10191 Set_Suppress_Elaboration_Warnings (Ent);
10198 -- pragma Pure_05 [(library_unit_NAME)];
10200 -- This pragma is useable only in GNAT_Mode, where it is used like
10201 -- pragma Pure but it is only effective in Ada 2005 mode (otherwise
10202 -- it is ignored). It may be used after a pragma Preelaborate, in
10203 -- which case it overrides the effect of the pragma Preelaborate.
10204 -- This is used to implement AI-362 which recategorizes some run-time
10205 -- packages in Ada 2005 mode.
10207 when Pragma_Pure_05 => Pure_05 : declare
10212 Check_Valid_Library_Unit_Pragma;
10214 if not GNAT_Mode then
10215 Error_Pragma ("pragma% only available in GNAT mode");
10217 if Nkind (N) = N_Null_Statement then
10221 -- This is one of the few cases where we need to test the value of
10222 -- Ada_Version_Explicit rather than Ada_Version (which is always
10223 -- set to Ada_05 in a predefined unit), we need to know the
10224 -- explicit version set to know if this pragma is active.
10226 if Ada_Version_Explicit >= Ada_05 then
10227 Ent := Find_Lib_Unit_Name;
10228 Set_Is_Preelaborated (Ent, False);
10230 Set_Suppress_Elaboration_Warnings (Ent);
10234 -------------------
10235 -- Pure_Function --
10236 -------------------
10238 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
10240 when Pragma_Pure_Function => Pure_Function : declare
10243 Def_Id : Entity_Id;
10244 Effective : Boolean := False;
10248 Check_Arg_Count (1);
10249 Check_Optional_Identifier (Arg1, Name_Entity);
10250 Check_Arg_Is_Local_Name (Arg1);
10251 E_Id := Expression (Arg1);
10253 if Error_Posted (E_Id) then
10257 -- Loop through homonyms (overloadings) of referenced entity
10259 E := Entity (E_Id);
10261 if Present (E) then
10263 Def_Id := Get_Base_Subprogram (E);
10265 if Ekind (Def_Id) /= E_Function
10266 and then Ekind (Def_Id) /= E_Generic_Function
10267 and then Ekind (Def_Id) /= E_Operator
10270 ("pragma% requires a function name", Arg1);
10273 Set_Is_Pure (Def_Id);
10275 if not Has_Pragma_Pure_Function (Def_Id) then
10276 Set_Has_Pragma_Pure_Function (Def_Id);
10281 exit when No (E) or else Scope (E) /= Current_Scope;
10285 and then Warn_On_Redundant_Constructs
10287 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
10293 --------------------
10294 -- Queuing_Policy --
10295 --------------------
10297 -- pragma Queuing_Policy (policy_IDENTIFIER);
10299 when Pragma_Queuing_Policy => declare
10303 Check_Ada_83_Warning;
10304 Check_Arg_Count (1);
10305 Check_No_Identifiers;
10306 Check_Arg_Is_Queuing_Policy (Arg1);
10307 Check_Valid_Configuration_Pragma;
10308 Get_Name_String (Chars (Expression (Arg1)));
10309 QP := Fold_Upper (Name_Buffer (1));
10311 if Queuing_Policy /= ' '
10312 and then Queuing_Policy /= QP
10314 Error_Msg_Sloc := Queuing_Policy_Sloc;
10315 Error_Pragma ("queuing policy incompatible with policy#");
10317 -- Set new policy, but always preserve System_Location since
10318 -- we like the error message with the run time name.
10321 Queuing_Policy := QP;
10323 if Queuing_Policy_Sloc /= System_Location then
10324 Queuing_Policy_Sloc := Loc;
10329 -----------------------
10330 -- Relative_Deadline --
10331 -----------------------
10333 -- pragma Relative_Deadline (time_span_EXPRESSION);
10335 when Pragma_Relative_Deadline => Relative_Deadline : declare
10336 P : constant Node_Id := Parent (N);
10341 Check_No_Identifiers;
10342 Check_Arg_Count (1);
10344 Arg := Expression (Arg1);
10346 -- The expression must be analyzed in the special manner described
10347 -- in "Handling of Default and Per-Object Expressions" in sem.ads.
10349 Preanalyze_Spec_Expression (Arg, RTE (RE_Time_Span));
10353 if Nkind (P) = N_Subprogram_Body then
10354 Check_In_Main_Program;
10358 elsif Nkind (P) = N_Task_Definition then
10361 -- Anything else is incorrect
10367 if Has_Relative_Deadline_Pragma (P) then
10368 Error_Pragma ("duplicate pragma% not allowed");
10370 Set_Has_Relative_Deadline_Pragma (P, True);
10372 if Nkind (P) = N_Task_Definition then
10373 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10376 end Relative_Deadline;
10378 ---------------------------
10379 -- Remote_Call_Interface --
10380 ---------------------------
10382 -- pragma Remote_Call_Interface [(library_unit_NAME)];
10384 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
10385 Cunit_Node : Node_Id;
10386 Cunit_Ent : Entity_Id;
10390 Check_Ada_83_Warning;
10391 Check_Valid_Library_Unit_Pragma;
10393 if Nkind (N) = N_Null_Statement then
10397 Cunit_Node := Cunit (Current_Sem_Unit);
10398 K := Nkind (Unit (Cunit_Node));
10399 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10401 if K = N_Package_Declaration
10402 or else K = N_Generic_Package_Declaration
10403 or else K = N_Subprogram_Declaration
10404 or else K = N_Generic_Subprogram_Declaration
10405 or else (K = N_Subprogram_Body
10406 and then Acts_As_Spec (Unit (Cunit_Node)))
10411 "pragma% must apply to package or subprogram declaration");
10414 Set_Is_Remote_Call_Interface (Cunit_Ent);
10415 end Remote_Call_Interface;
10421 -- pragma Remote_Types [(library_unit_NAME)];
10423 when Pragma_Remote_Types => Remote_Types : declare
10424 Cunit_Node : Node_Id;
10425 Cunit_Ent : Entity_Id;
10428 Check_Ada_83_Warning;
10429 Check_Valid_Library_Unit_Pragma;
10431 if Nkind (N) = N_Null_Statement then
10435 Cunit_Node := Cunit (Current_Sem_Unit);
10436 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10438 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
10440 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
10443 "pragma% can only apply to a package declaration");
10446 Set_Is_Remote_Types (Cunit_Ent);
10453 -- pragma Ravenscar;
10455 when Pragma_Ravenscar =>
10457 Check_Arg_Count (0);
10458 Check_Valid_Configuration_Pragma;
10459 Set_Ravenscar_Profile (N);
10461 if Warn_On_Obsolescent_Feature then
10463 ("pragma Ravenscar is an obsolescent feature?", N);
10465 ("|use pragma Profile (Ravenscar) instead", N);
10468 -------------------------
10469 -- Restricted_Run_Time --
10470 -------------------------
10472 -- pragma Restricted_Run_Time;
10474 when Pragma_Restricted_Run_Time =>
10476 Check_Arg_Count (0);
10477 Check_Valid_Configuration_Pragma;
10478 Set_Profile_Restrictions
10479 (Restricted, N, Warn => Treat_Restrictions_As_Warnings);
10481 if Warn_On_Obsolescent_Feature then
10483 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
10485 ("|use pragma Profile (Restricted) instead", N);
10492 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
10495 -- restriction_IDENTIFIER
10496 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10498 when Pragma_Restrictions =>
10499 Process_Restrictions_Or_Restriction_Warnings
10500 (Warn => Treat_Restrictions_As_Warnings);
10502 --------------------------
10503 -- Restriction_Warnings --
10504 --------------------------
10506 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
10509 -- restriction_IDENTIFIER
10510 -- | restriction_parameter_IDENTIFIER => EXPRESSION
10512 when Pragma_Restriction_Warnings =>
10514 Process_Restrictions_Or_Restriction_Warnings (Warn => True);
10520 -- pragma Reviewable;
10522 when Pragma_Reviewable =>
10523 Check_Ada_83_Warning;
10524 Check_Arg_Count (0);
10527 -------------------
10528 -- Share_Generic --
10529 -------------------
10531 -- pragma Share_Generic (NAME {, NAME});
10533 when Pragma_Share_Generic =>
10535 Process_Generic_List;
10541 -- pragma Shared (LOCAL_NAME);
10543 when Pragma_Shared =>
10545 Process_Atomic_Shared_Volatile;
10547 --------------------
10548 -- Shared_Passive --
10549 --------------------
10551 -- pragma Shared_Passive [(library_unit_NAME)];
10553 -- Set the flag Is_Shared_Passive of program unit name entity
10555 when Pragma_Shared_Passive => Shared_Passive : declare
10556 Cunit_Node : Node_Id;
10557 Cunit_Ent : Entity_Id;
10560 Check_Ada_83_Warning;
10561 Check_Valid_Library_Unit_Pragma;
10563 if Nkind (N) = N_Null_Statement then
10567 Cunit_Node := Cunit (Current_Sem_Unit);
10568 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
10570 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
10572 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
10575 "pragma% can only apply to a package declaration");
10578 Set_Is_Shared_Passive (Cunit_Ent);
10579 end Shared_Passive;
10581 ----------------------
10582 -- Source_File_Name --
10583 ----------------------
10585 -- There are five forms for this pragma:
10587 -- pragma Source_File_Name (
10588 -- [UNIT_NAME =>] unit_NAME,
10589 -- BODY_FILE_NAME => STRING_LITERAL
10590 -- [, [INDEX =>] INTEGER_LITERAL]);
10592 -- pragma Source_File_Name (
10593 -- [UNIT_NAME =>] unit_NAME,
10594 -- SPEC_FILE_NAME => STRING_LITERAL
10595 -- [, [INDEX =>] INTEGER_LITERAL]);
10597 -- pragma Source_File_Name (
10598 -- BODY_FILE_NAME => STRING_LITERAL
10599 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10600 -- [, CASING => CASING_SPEC]);
10602 -- pragma Source_File_Name (
10603 -- SPEC_FILE_NAME => STRING_LITERAL
10604 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10605 -- [, CASING => CASING_SPEC]);
10607 -- pragma Source_File_Name (
10608 -- SUBUNIT_FILE_NAME => STRING_LITERAL
10609 -- [, DOT_REPLACEMENT => STRING_LITERAL]
10610 -- [, CASING => CASING_SPEC]);
10612 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
10614 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
10615 -- Source_File_Name (SFN), however their usage is exclusive:
10616 -- SFN can only be used when no project file is used, while
10617 -- SFNP can only be used when a project file is used.
10619 -- No processing here. Processing was completed during parsing,
10620 -- since we need to have file names set as early as possible.
10621 -- Units are loaded well before semantic processing starts.
10623 -- The only processing we defer to this point is the check
10624 -- for correct placement.
10626 when Pragma_Source_File_Name =>
10628 Check_Valid_Configuration_Pragma;
10630 ------------------------------
10631 -- Source_File_Name_Project --
10632 ------------------------------
10634 -- See Source_File_Name for syntax
10636 -- No processing here. Processing was completed during parsing,
10637 -- since we need to have file names set as early as possible.
10638 -- Units are loaded well before semantic processing starts.
10640 -- The only processing we defer to this point is the check
10641 -- for correct placement.
10643 when Pragma_Source_File_Name_Project =>
10645 Check_Valid_Configuration_Pragma;
10647 -- Check that a pragma Source_File_Name_Project is used only
10648 -- in a configuration pragmas file.
10650 -- Pragmas Source_File_Name_Project should only be generated
10651 -- by the Project Manager in configuration pragmas files.
10653 -- This is really an ugly test. It seems to depend on some
10654 -- accidental and undocumented property. At the very least
10655 -- it needs to be documented, but it would be better to have
10656 -- a clean way of testing if we are in a configuration file???
10658 if Present (Parent (N)) then
10660 ("pragma% can only appear in a configuration pragmas file");
10663 ----------------------
10664 -- Source_Reference --
10665 ----------------------
10667 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
10669 -- Nothing to do, all processing completed in Par.Prag, since we
10670 -- need the information for possible parser messages that are output
10672 when Pragma_Source_Reference =>
10675 --------------------------------
10676 -- Static_Elaboration_Desired --
10677 --------------------------------
10679 -- pragma Static_Elaboration_Desired (DIRECT_NAME);
10681 when Pragma_Static_Elaboration_Desired =>
10683 Check_At_Most_N_Arguments (1);
10685 if Is_Compilation_Unit (Current_Scope)
10686 and then Ekind (Current_Scope) = E_Package
10688 Set_Static_Elaboration_Desired (Current_Scope, True);
10690 Error_Pragma ("pragma% must apply to a library-level package");
10697 -- pragma Storage_Size (EXPRESSION);
10699 when Pragma_Storage_Size => Storage_Size : declare
10700 P : constant Node_Id := Parent (N);
10704 Check_No_Identifiers;
10705 Check_Arg_Count (1);
10707 -- The expression must be analyzed in the special manner described
10708 -- in "Handling of Default Expressions" in sem.ads.
10710 Arg := Expression (Arg1);
10711 Preanalyze_Spec_Expression (Arg, Any_Integer);
10713 if not Is_Static_Expression (Arg) then
10714 Check_Restriction (Static_Storage_Size, Arg);
10717 if Nkind (P) /= N_Task_Definition then
10722 if Has_Storage_Size_Pragma (P) then
10723 Error_Pragma ("duplicate pragma% not allowed");
10725 Set_Has_Storage_Size_Pragma (P, True);
10728 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10729 -- ??? exp_ch9 should use this!
10737 -- pragma Storage_Unit (NUMERIC_LITERAL);
10739 -- Only permitted argument is System'Storage_Unit value
10741 when Pragma_Storage_Unit =>
10742 Check_No_Identifiers;
10743 Check_Arg_Count (1);
10744 Check_Arg_Is_Integer_Literal (Arg1);
10746 if Intval (Expression (Arg1)) /=
10747 UI_From_Int (Ttypes.System_Storage_Unit)
10749 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
10751 ("the only allowed argument for pragma% is ^", Arg1);
10754 --------------------
10755 -- Stream_Convert --
10756 --------------------
10758 -- pragma Stream_Convert (
10759 -- [Entity =>] type_LOCAL_NAME,
10760 -- [Read =>] function_NAME,
10761 -- [Write =>] function NAME);
10763 when Pragma_Stream_Convert => Stream_Convert : declare
10765 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
10766 -- Check that the given argument is the name of a local
10767 -- function of one argument that is not overloaded earlier
10768 -- in the current local scope. A check is also made that the
10769 -- argument is a function with one parameter.
10771 --------------------------------------
10772 -- Check_OK_Stream_Convert_Function --
10773 --------------------------------------
10775 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
10779 Check_Arg_Is_Local_Name (Arg);
10780 Ent := Entity (Expression (Arg));
10782 if Has_Homonym (Ent) then
10784 ("argument for pragma% may not be overloaded", Arg);
10787 if Ekind (Ent) /= E_Function
10788 or else No (First_Formal (Ent))
10789 or else Present (Next_Formal (First_Formal (Ent)))
10792 ("argument for pragma% must be" &
10793 " function of one argument", Arg);
10795 end Check_OK_Stream_Convert_Function;
10797 -- Start of processing for Stream_Convert
10801 Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
10802 Check_Arg_Count (3);
10803 Check_Optional_Identifier (Arg1, Name_Entity);
10804 Check_Optional_Identifier (Arg2, Name_Read);
10805 Check_Optional_Identifier (Arg3, Name_Write);
10806 Check_Arg_Is_Local_Name (Arg1);
10807 Check_OK_Stream_Convert_Function (Arg2);
10808 Check_OK_Stream_Convert_Function (Arg3);
10811 Typ : constant Entity_Id :=
10812 Underlying_Type (Entity (Expression (Arg1)));
10813 Read : constant Entity_Id := Entity (Expression (Arg2));
10814 Write : constant Entity_Id := Entity (Expression (Arg3));
10817 Check_First_Subtype (Arg1);
10819 -- Check for too early or too late. Note that we don't enforce
10820 -- the rule about primitive operations in this case, since, as
10821 -- is the case for explicit stream attributes themselves, these
10822 -- restrictions are not appropriate. Note that the chaining of
10823 -- the pragma by Rep_Item_Too_Late is actually the critical
10824 -- processing done for this pragma.
10826 if Rep_Item_Too_Early (Typ, N)
10828 Rep_Item_Too_Late (Typ, N, FOnly => True)
10833 -- Return if previous error
10835 if Etype (Typ) = Any_Type
10837 Etype (Read) = Any_Type
10839 Etype (Write) = Any_Type
10846 if Underlying_Type (Etype (Read)) /= Typ then
10848 ("incorrect return type for function&", Arg2);
10851 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
10853 ("incorrect parameter type for function&", Arg3);
10856 if Underlying_Type (Etype (First_Formal (Read))) /=
10857 Underlying_Type (Etype (Write))
10860 ("result type of & does not match Read parameter type",
10864 end Stream_Convert;
10866 -------------------------
10867 -- Style_Checks (GNAT) --
10868 -------------------------
10870 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
10872 -- This is processed by the parser since some of the style
10873 -- checks take place during source scanning and parsing. This
10874 -- means that we don't need to issue error messages here.
10876 when Pragma_Style_Checks => Style_Checks : declare
10877 A : constant Node_Id := Expression (Arg1);
10883 Check_No_Identifiers;
10885 -- Two argument form
10887 if Arg_Count = 2 then
10888 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
10895 E_Id := Expression (Arg2);
10898 if not Is_Entity_Name (E_Id) then
10900 ("second argument of pragma% must be entity name",
10904 E := Entity (E_Id);
10910 Set_Suppress_Style_Checks (E,
10911 (Chars (Expression (Arg1)) = Name_Off));
10912 exit when No (Homonym (E));
10918 -- One argument form
10921 Check_Arg_Count (1);
10923 if Nkind (A) = N_String_Literal then
10927 Slen : constant Natural := Natural (String_Length (S));
10928 Options : String (1 .. Slen);
10934 C := Get_String_Char (S, Int (J));
10935 exit when not In_Character_Range (C);
10936 Options (J) := Get_Character (C);
10938 -- If at end of string, set options. As per discussion
10939 -- above, no need to check for errors, since we issued
10940 -- them in the parser.
10943 Set_Style_Check_Options (Options);
10951 elsif Nkind (A) = N_Identifier then
10952 if Chars (A) = Name_All_Checks then
10953 Set_Default_Style_Check_Options;
10955 elsif Chars (A) = Name_On then
10956 Style_Check := True;
10958 elsif Chars (A) = Name_Off then
10959 Style_Check := False;
10969 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
10971 when Pragma_Subtitle =>
10973 Check_Arg_Count (1);
10974 Check_Optional_Identifier (Arg1, Name_Subtitle);
10975 Check_Arg_Is_String_Literal (Arg1);
10981 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
10983 when Pragma_Suppress =>
10984 Process_Suppress_Unsuppress (True);
10990 -- pragma Suppress_All;
10992 -- The only check made here is that the pragma appears in the
10993 -- proper place, i.e. following a compilation unit. If indeed
10994 -- it appears in this context, then the parser has already
10995 -- inserted an equivalent pragma Suppress (All_Checks) to get
10996 -- the required effect.
10998 when Pragma_Suppress_All =>
11000 Check_Arg_Count (0);
11002 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
11003 or else not Is_List_Member (N)
11004 or else List_Containing (N) /= Pragmas_After (Parent (N))
11007 ("misplaced pragma%, must follow compilation unit");
11010 -------------------------
11011 -- Suppress_Debug_Info --
11012 -------------------------
11014 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
11016 when Pragma_Suppress_Debug_Info =>
11018 Check_Arg_Count (1);
11019 Check_Optional_Identifier (Arg1, Name_Entity);
11020 Check_Arg_Is_Local_Name (Arg1);
11021 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
11023 ----------------------------------
11024 -- Suppress_Exception_Locations --
11025 ----------------------------------
11027 -- pragma Suppress_Exception_Locations;
11029 when Pragma_Suppress_Exception_Locations =>
11031 Check_Arg_Count (0);
11032 Check_Valid_Configuration_Pragma;
11033 Exception_Locations_Suppressed := True;
11035 -----------------------------
11036 -- Suppress_Initialization --
11037 -----------------------------
11039 -- pragma Suppress_Initialization ([Entity =>] type_Name);
11041 when Pragma_Suppress_Initialization => Suppress_Init : declare
11047 Check_Arg_Count (1);
11048 Check_Optional_Identifier (Arg1, Name_Entity);
11049 Check_Arg_Is_Local_Name (Arg1);
11051 E_Id := Expression (Arg1);
11053 if Etype (E_Id) = Any_Type then
11057 E := Entity (E_Id);
11059 if Is_Type (E) then
11060 if Is_Incomplete_Or_Private_Type (E) then
11061 if No (Full_View (Base_Type (E))) then
11063 ("argument of pragma% cannot be an incomplete type",
11066 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
11069 Set_Suppress_Init_Proc (Base_Type (E));
11074 ("pragma% requires argument that is a type name", Arg1);
11082 -- pragma System_Name (DIRECT_NAME);
11084 -- Syntax check: one argument, which must be the identifier GNAT
11085 -- or the identifier GCC, no other identifiers are acceptable.
11087 when Pragma_System_Name =>
11089 Check_No_Identifiers;
11090 Check_Arg_Count (1);
11091 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
11093 -----------------------------
11094 -- Task_Dispatching_Policy --
11095 -----------------------------
11097 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
11099 when Pragma_Task_Dispatching_Policy => declare
11103 Check_Ada_83_Warning;
11104 Check_Arg_Count (1);
11105 Check_No_Identifiers;
11106 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
11107 Check_Valid_Configuration_Pragma;
11108 Get_Name_String (Chars (Expression (Arg1)));
11109 DP := Fold_Upper (Name_Buffer (1));
11111 if Task_Dispatching_Policy /= ' '
11112 and then Task_Dispatching_Policy /= DP
11114 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
11116 ("task dispatching policy incompatible with policy#");
11118 -- Set new policy, but always preserve System_Location since
11119 -- we like the error message with the run time name.
11122 Task_Dispatching_Policy := DP;
11124 if Task_Dispatching_Policy_Sloc /= System_Location then
11125 Task_Dispatching_Policy_Sloc := Loc;
11134 -- pragma Task_Info (EXPRESSION);
11136 when Pragma_Task_Info => Task_Info : declare
11137 P : constant Node_Id := Parent (N);
11142 if Nkind (P) /= N_Task_Definition then
11143 Error_Pragma ("pragma% must appear in task definition");
11146 Check_No_Identifiers;
11147 Check_Arg_Count (1);
11149 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
11151 if Etype (Expression (Arg1)) = Any_Type then
11155 if Has_Task_Info_Pragma (P) then
11156 Error_Pragma ("duplicate pragma% not allowed");
11158 Set_Has_Task_Info_Pragma (P, True);
11166 -- pragma Task_Name (string_EXPRESSION);
11168 when Pragma_Task_Name => Task_Name : declare
11169 P : constant Node_Id := Parent (N);
11173 Check_No_Identifiers;
11174 Check_Arg_Count (1);
11176 Arg := Expression (Arg1);
11177 Analyze_And_Resolve (Arg, Standard_String);
11179 if Nkind (P) /= N_Task_Definition then
11183 if Has_Task_Name_Pragma (P) then
11184 Error_Pragma ("duplicate pragma% not allowed");
11186 Set_Has_Task_Name_Pragma (P, True);
11187 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
11195 -- pragma Task_Storage (
11196 -- [Task_Type =>] LOCAL_NAME,
11197 -- [Top_Guard =>] static_integer_EXPRESSION);
11199 when Pragma_Task_Storage => Task_Storage : declare
11200 Args : Args_List (1 .. 2);
11201 Names : constant Name_List (1 .. 2) := (
11205 Task_Type : Node_Id renames Args (1);
11206 Top_Guard : Node_Id renames Args (2);
11212 Gather_Associations (Names, Args);
11214 if No (Task_Type) then
11216 ("missing task_type argument for pragma%");
11219 Check_Arg_Is_Local_Name (Task_Type);
11221 Ent := Entity (Task_Type);
11223 if not Is_Task_Type (Ent) then
11225 ("argument for pragma% must be task type", Task_Type);
11228 if No (Top_Guard) then
11230 ("pragma% takes two arguments", Task_Type);
11232 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
11235 Check_First_Subtype (Task_Type);
11237 if Rep_Item_Too_Late (Ent, N) then
11242 --------------------------
11243 -- Thread_Local_Storage --
11244 --------------------------
11246 -- pragma Thread_Local_Storage ([Entity =>] LOCAL_NAME);
11248 when Pragma_Thread_Local_Storage => Thread_Local_Storage : declare
11254 Check_Arg_Count (1);
11255 Check_Optional_Identifier (Arg1, Name_Entity);
11256 Check_Arg_Is_Library_Level_Local_Name (Arg1);
11258 Id := Expression (Arg1);
11261 if not Is_Entity_Name (Id)
11262 or else Ekind (Entity (Id)) /= E_Variable
11264 Error_Pragma_Arg ("local variable name required", Arg1);
11269 if Rep_Item_Too_Early (E, N)
11270 or else Rep_Item_Too_Late (E, N)
11275 Set_Has_Pragma_Thread_Local_Storage (E);
11276 Set_Has_Gigi_Rep_Item (E);
11277 end Thread_Local_Storage;
11283 -- pragma Time_Slice (static_duration_EXPRESSION);
11285 when Pragma_Time_Slice => Time_Slice : declare
11291 Check_Arg_Count (1);
11292 Check_No_Identifiers;
11293 Check_In_Main_Program;
11294 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
11296 if not Error_Posted (Arg1) then
11298 while Present (Nod) loop
11299 if Nkind (Nod) = N_Pragma
11300 and then Pragma_Name (Nod) = Name_Time_Slice
11302 Error_Msg_Name_1 := Pname;
11303 Error_Msg_N ("duplicate pragma% not permitted", Nod);
11310 -- Process only if in main unit
11312 if Get_Source_Unit (Loc) = Main_Unit then
11313 Opt.Time_Slice_Set := True;
11314 Val := Expr_Value_R (Expression (Arg1));
11316 if Val <= Ureal_0 then
11317 Opt.Time_Slice_Value := 0;
11319 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
11320 Opt.Time_Slice_Value := 1_000_000_000;
11323 Opt.Time_Slice_Value :=
11324 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
11333 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
11335 -- TITLING_OPTION ::=
11336 -- [Title =>] STRING_LITERAL
11337 -- | [Subtitle =>] STRING_LITERAL
11339 when Pragma_Title => Title : declare
11340 Args : Args_List (1 .. 2);
11341 Names : constant Name_List (1 .. 2) := (
11347 Gather_Associations (Names, Args);
11349 for J in 1 .. 2 loop
11350 if Present (Args (J)) then
11351 Check_Arg_Is_String_Literal (Args (J));
11356 ---------------------
11357 -- Unchecked_Union --
11358 ---------------------
11360 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
11362 when Pragma_Unchecked_Union => Unchecked_Union : declare
11363 Assoc : constant Node_Id := Arg1;
11364 Type_Id : constant Node_Id := Expression (Assoc);
11375 Check_No_Identifiers;
11376 Check_Arg_Count (1);
11377 Check_Arg_Is_Local_Name (Arg1);
11379 Find_Type (Type_Id);
11380 Typ := Entity (Type_Id);
11383 or else Rep_Item_Too_Early (Typ, N)
11387 Typ := Underlying_Type (Typ);
11390 if Rep_Item_Too_Late (Typ, N) then
11394 Check_First_Subtype (Arg1);
11396 -- Note remaining cases are references to a type in the current
11397 -- declarative part. If we find an error, we post the error on
11398 -- the relevant type declaration at an appropriate point.
11400 if not Is_Record_Type (Typ) then
11401 Error_Msg_N ("Unchecked_Union must be record type", Typ);
11404 elsif Is_Tagged_Type (Typ) then
11405 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
11408 elsif Is_Limited_Type (Typ) then
11410 ("Unchecked_Union must not be limited record type", Typ);
11411 Explain_Limited_Type (Typ, Typ);
11415 if not Has_Discriminants (Typ) then
11417 ("Unchecked_Union must have one discriminant", Typ);
11421 Discr := First_Discriminant (Typ);
11422 while Present (Discr) loop
11423 if No (Discriminant_Default_Value (Discr)) then
11425 ("Unchecked_Union discriminant must have default value",
11428 Next_Discriminant (Discr);
11431 Tdef := Type_Definition (Declaration_Node (Typ));
11432 Clist := Component_List (Tdef);
11434 Comp := First (Component_Items (Clist));
11435 while Present (Comp) loop
11436 Check_Component (Comp);
11440 if No (Clist) or else No (Variant_Part (Clist)) then
11442 ("Unchecked_Union must have variant part",
11447 Vpart := Variant_Part (Clist);
11449 Variant := First (Variants (Vpart));
11450 while Present (Variant) loop
11451 Check_Variant (Variant);
11456 Set_Is_Unchecked_Union (Typ, True);
11457 Set_Convention (Typ, Convention_C);
11459 Set_Has_Unchecked_Union (Base_Type (Typ), True);
11460 Set_Is_Unchecked_Union (Base_Type (Typ), True);
11461 end Unchecked_Union;
11463 ------------------------
11464 -- Unimplemented_Unit --
11465 ------------------------
11467 -- pragma Unimplemented_Unit;
11469 -- Note: this only gives an error if we are generating code,
11470 -- or if we are in a generic library unit (where the pragma
11471 -- appears in the body, not in the spec).
11473 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
11474 Cunitent : constant Entity_Id :=
11475 Cunit_Entity (Get_Source_Unit (Loc));
11476 Ent_Kind : constant Entity_Kind :=
11481 Check_Arg_Count (0);
11483 if Operating_Mode = Generate_Code
11484 or else Ent_Kind = E_Generic_Function
11485 or else Ent_Kind = E_Generic_Procedure
11486 or else Ent_Kind = E_Generic_Package
11488 Get_Name_String (Chars (Cunitent));
11489 Set_Casing (Mixed_Case);
11490 Write_Str (Name_Buffer (1 .. Name_Len));
11491 Write_Str (" is not supported in this configuration");
11493 raise Unrecoverable_Error;
11495 end Unimplemented_Unit;
11497 ------------------------
11498 -- Universal_Aliasing --
11499 ------------------------
11501 -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)];
11503 when Pragma_Universal_Aliasing => Universal_Alias : declare
11508 Check_Arg_Count (1);
11509 Check_Optional_Identifier (Arg2, Name_Entity);
11510 Check_Arg_Is_Local_Name (Arg1);
11511 E_Id := Entity (Expression (Arg1));
11513 if E_Id = Any_Type then
11515 elsif No (E_Id) or else not Is_Type (E_Id) then
11516 Error_Pragma_Arg ("pragma% requires type", Arg1);
11519 Set_Universal_Aliasing (Implementation_Base_Type (E_Id));
11520 end Universal_Alias;
11522 --------------------
11523 -- Universal_Data --
11524 --------------------
11526 -- pragma Universal_Data [(library_unit_NAME)];
11528 when Pragma_Universal_Data =>
11531 -- If this is a configuration pragma, then set the universal
11532 -- addressing option, otherwise confirm that the pragma
11533 -- satisfies the requirements of library unit pragma placement
11534 -- and leave it to the GNAAMP back end to detect the pragma
11535 -- (avoids transitive setting of the option due to withed units).
11537 if Is_Configuration_Pragma then
11538 Universal_Addressing_On_AAMP := True;
11540 Check_Valid_Library_Unit_Pragma;
11543 if not AAMP_On_Target then
11544 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
11551 -- pragma Unmodified (local_Name {, local_Name});
11553 when Pragma_Unmodified => Unmodified : declare
11554 Arg_Node : Node_Id;
11555 Arg_Expr : Node_Id;
11556 Arg_Ent : Entity_Id;
11560 Check_At_Least_N_Arguments (1);
11562 -- Loop through arguments
11565 while Present (Arg_Node) loop
11566 Check_No_Identifier (Arg_Node);
11568 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11569 -- will in fact generate reference, so that the entity will
11570 -- have a reference, which will inhibit any warnings about
11571 -- it not being referenced, and also properly show up in the
11572 -- ali file as a reference. But this reference is recorded
11573 -- before the Has_Pragma_Unreferenced flag is set, so that
11574 -- no warning is generated for this reference.
11576 Check_Arg_Is_Local_Name (Arg_Node);
11577 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11579 if Is_Entity_Name (Arg_Expr) then
11580 Arg_Ent := Entity (Arg_Expr);
11582 if not Is_Assignable (Arg_Ent) then
11584 ("pragma% can only be applied to a variable",
11587 Set_Has_Pragma_Unmodified (Arg_Ent);
11599 -- pragma Unreferenced (local_Name {, local_Name});
11601 -- or when used in a context clause:
11603 -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
11605 when Pragma_Unreferenced => Unreferenced : declare
11606 Arg_Node : Node_Id;
11607 Arg_Expr : Node_Id;
11608 Arg_Ent : Entity_Id;
11613 Check_At_Least_N_Arguments (1);
11615 -- Check case of appearing within context clause
11617 if Is_In_Context_Clause then
11619 -- The arguments must all be units mentioned in a with clause
11620 -- in the same context clause. Note we already checked (in
11621 -- Par.Prag) that the arguments are either identifiers or
11622 -- selected components.
11625 while Present (Arg_Node) loop
11626 Citem := First (List_Containing (N));
11627 while Citem /= N loop
11628 if Nkind (Citem) = N_With_Clause
11629 and then Same_Name (Name (Citem), Expression (Arg_Node))
11631 Set_Has_Pragma_Unreferenced
11634 (Library_Unit (Citem))));
11635 Set_Unit_Name (Expression (Arg_Node), Name (Citem));
11644 ("argument of pragma% is not with'ed unit", Arg_Node);
11650 -- Case of not in list of context items
11654 while Present (Arg_Node) loop
11655 Check_No_Identifier (Arg_Node);
11657 -- Note: the analyze call done by Check_Arg_Is_Local_Name
11658 -- will in fact generate reference, so that the entity will
11659 -- have a reference, which will inhibit any warnings about
11660 -- it not being referenced, and also properly show up in the
11661 -- ali file as a reference. But this reference is recorded
11662 -- before the Has_Pragma_Unreferenced flag is set, so that
11663 -- no warning is generated for this reference.
11665 Check_Arg_Is_Local_Name (Arg_Node);
11666 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11668 if Is_Entity_Name (Arg_Expr) then
11669 Arg_Ent := Entity (Arg_Expr);
11671 -- If the entity is overloaded, the pragma applies to the
11672 -- most recent overloading, as documented. In this case,
11673 -- name resolution does not generate a reference, so it
11674 -- must be done here explicitly.
11676 if Is_Overloaded (Arg_Expr) then
11677 Generate_Reference (Arg_Ent, N);
11680 Set_Has_Pragma_Unreferenced (Arg_Ent);
11688 --------------------------
11689 -- Unreferenced_Objects --
11690 --------------------------
11692 -- pragma Unreferenced_Objects (local_Name {, local_Name});
11694 when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare
11695 Arg_Node : Node_Id;
11696 Arg_Expr : Node_Id;
11700 Check_At_Least_N_Arguments (1);
11703 while Present (Arg_Node) loop
11704 Check_No_Identifier (Arg_Node);
11705 Check_Arg_Is_Local_Name (Arg_Node);
11706 Arg_Expr := Get_Pragma_Arg (Arg_Node);
11708 if not Is_Entity_Name (Arg_Expr)
11709 or else not Is_Type (Entity (Arg_Expr))
11712 ("argument for pragma% must be type or subtype", Arg_Node);
11715 Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr));
11718 end Unreferenced_Objects;
11720 ------------------------------
11721 -- Unreserve_All_Interrupts --
11722 ------------------------------
11724 -- pragma Unreserve_All_Interrupts;
11726 when Pragma_Unreserve_All_Interrupts =>
11728 Check_Arg_Count (0);
11730 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
11731 Unreserve_All_Interrupts := True;
11738 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
11740 when Pragma_Unsuppress =>
11742 Process_Suppress_Unsuppress (False);
11744 -------------------
11745 -- Use_VADS_Size --
11746 -------------------
11748 -- pragma Use_VADS_Size;
11750 when Pragma_Use_VADS_Size =>
11752 Check_Arg_Count (0);
11753 Check_Valid_Configuration_Pragma;
11754 Use_VADS_Size := True;
11756 ---------------------
11757 -- Validity_Checks --
11758 ---------------------
11760 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
11762 when Pragma_Validity_Checks => Validity_Checks : declare
11763 A : constant Node_Id := Expression (Arg1);
11769 Check_Arg_Count (1);
11770 Check_No_Identifiers;
11772 if Nkind (A) = N_String_Literal then
11776 Slen : constant Natural := Natural (String_Length (S));
11777 Options : String (1 .. Slen);
11783 C := Get_String_Char (S, Int (J));
11784 exit when not In_Character_Range (C);
11785 Options (J) := Get_Character (C);
11788 Set_Validity_Check_Options (Options);
11796 elsif Nkind (A) = N_Identifier then
11798 if Chars (A) = Name_All_Checks then
11799 Set_Validity_Check_Options ("a");
11801 elsif Chars (A) = Name_On then
11802 Validity_Checks_On := True;
11804 elsif Chars (A) = Name_Off then
11805 Validity_Checks_On := False;
11809 end Validity_Checks;
11815 -- pragma Volatile (LOCAL_NAME);
11817 when Pragma_Volatile =>
11818 Process_Atomic_Shared_Volatile;
11820 -------------------------
11821 -- Volatile_Components --
11822 -------------------------
11824 -- pragma Volatile_Components (array_LOCAL_NAME);
11826 -- Volatile is handled by the same circuit as Atomic_Components
11832 -- pragma Warnings (On | Off);
11833 -- pragma Warnings (On | Off, LOCAL_NAME);
11834 -- pragma Warnings (static_string_EXPRESSION);
11835 -- pragma Warnings (On | Off, STRING_LITERAL);
11837 when Pragma_Warnings => Warnings : begin
11839 Check_At_Least_N_Arguments (1);
11840 Check_No_Identifiers;
11843 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
11846 -- One argument case
11848 if Arg_Count = 1 then
11850 -- On/Off one argument case was processed by parser
11852 if Nkind (Argx) = N_Identifier
11854 (Chars (Argx) = Name_On
11856 Chars (Argx) = Name_Off)
11860 -- One argument case must be ON/OFF or static string expr
11862 elsif not Is_Static_String_Expression (Arg1) then
11864 ("argument of pragma% must be On/Off or " &
11865 "static string expression", Arg2);
11867 -- One argument string expression case
11871 Lit : constant Node_Id := Expr_Value_S (Argx);
11872 Str : constant String_Id := Strval (Lit);
11873 Len : constant Nat := String_Length (Str);
11881 while J <= Len loop
11882 C := Get_String_Char (Str, J);
11883 OK := In_Character_Range (C);
11886 Chr := Get_Character (C);
11890 if J < Len and then Chr = '.' then
11892 C := Get_String_Char (Str, J);
11893 Chr := Get_Character (C);
11895 if not Set_Dot_Warning_Switch (Chr) then
11897 ("invalid warning switch character " &
11904 OK := Set_Warning_Switch (Chr);
11910 ("invalid warning switch character " & Chr,
11919 -- Two or more arguments (must be two)
11922 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
11923 Check_At_Most_N_Arguments (2);
11931 E_Id := Expression (Arg2);
11934 -- In the expansion of an inlined body, a reference to
11935 -- the formal may be wrapped in a conversion if the
11936 -- actual is a conversion. Retrieve the real entity name.
11938 if (In_Instance_Body
11939 or else In_Inlined_Body)
11940 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
11942 E_Id := Expression (E_Id);
11945 -- Entity name case
11947 if Is_Entity_Name (E_Id) then
11948 E := Entity (E_Id);
11955 (E, (Chars (Expression (Arg1)) = Name_Off));
11957 if Chars (Expression (Arg1)) = Name_Off
11958 and then Warn_On_Warnings_Off
11960 Warnings_Off_Pragmas.Append ((N, E));
11963 if Is_Enumeration_Type (E) then
11967 Lit := First_Literal (E);
11968 while Present (Lit) loop
11969 Set_Warnings_Off (Lit);
11970 Next_Literal (Lit);
11975 exit when No (Homonym (E));
11980 -- Error if not entity or static string literal case
11982 elsif not Is_Static_String_Expression (Arg2) then
11984 ("second argument of pragma% must be entity " &
11985 "name or static string expression", Arg2);
11987 -- String literal case
11990 String_To_Name_Buffer
11991 (Strval (Expr_Value_S (Expression (Arg2))));
11993 -- Note on configuration pragma case: If this is a
11994 -- configuration pragma, then for an OFF pragma, we
11995 -- just set Config True in the call, which is all
11996 -- that needs to be done. For the case of ON, this
11997 -- is normally an error, unless it is canceling the
11998 -- effect of a previous OFF pragma in the same file.
11999 -- In any other case, an error will be signalled (ON
12000 -- with no matching OFF).
12002 if Chars (Argx) = Name_Off then
12003 Set_Specific_Warning_Off
12004 (Loc, Name_Buffer (1 .. Name_Len),
12005 Config => Is_Configuration_Pragma);
12007 elsif Chars (Argx) = Name_On then
12008 Set_Specific_Warning_On
12009 (Loc, Name_Buffer (1 .. Name_Len), Err);
12013 ("?pragma Warnings On with no " &
12014 "matching Warnings Off",
12024 -------------------
12025 -- Weak_External --
12026 -------------------
12028 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
12030 when Pragma_Weak_External => Weak_External : declare
12035 Check_Arg_Count (1);
12036 Check_Optional_Identifier (Arg1, Name_Entity);
12037 Check_Arg_Is_Library_Level_Local_Name (Arg1);
12038 Ent := Entity (Expression (Arg1));
12040 if Rep_Item_Too_Early (Ent, N) then
12043 Ent := Underlying_Type (Ent);
12046 -- The only processing required is to link this item on to the
12047 -- list of rep items for the given entity. This is accomplished
12048 -- by the call to Rep_Item_Too_Late (when no error is detected
12049 -- and False is returned).
12051 if Rep_Item_Too_Late (Ent, N) then
12054 Set_Has_Gigi_Rep_Item (Ent);
12058 -----------------------------
12059 -- Wide_Character_Encoding --
12060 -----------------------------
12062 -- pragma Wide_Character_Encoding (IDENTIFIER);
12064 when Pragma_Wide_Character_Encoding =>
12067 -- Nothing to do, handled in parser. Note that we do not enforce
12068 -- configuration pragma placement, this pragma can appear at any
12069 -- place in the source, allowing mixed encodings within a single
12074 --------------------
12075 -- Unknown_Pragma --
12076 --------------------
12078 -- Should be impossible, since the case of an unknown pragma is
12079 -- separately processed before the case statement is entered.
12081 when Unknown_Pragma =>
12082 raise Program_Error;
12086 when Pragma_Exit => null;
12087 end Analyze_Pragma;
12089 -------------------
12090 -- Check_Enabled --
12091 -------------------
12093 function Check_Enabled (Nam : Name_Id) return Boolean is
12097 PP := Opt.Check_Policy_List;
12100 return Assertions_Enabled;
12103 Nam = Chars (Expression (First (Pragma_Argument_Associations (PP))))
12106 Chars (Expression (Last (Pragma_Argument_Associations (PP))))
12108 when Name_On | Name_Check =>
12110 when Name_Off | Name_Ignore =>
12113 raise Program_Error;
12117 PP := Next_Pragma (PP);
12122 ---------------------------------
12123 -- Delay_Config_Pragma_Analyze --
12124 ---------------------------------
12126 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
12128 return Pragma_Name (N) = Name_Interrupt_State
12130 Pragma_Name (N) = Name_Priority_Specific_Dispatching;
12131 end Delay_Config_Pragma_Analyze;
12133 -------------------------
12134 -- Get_Base_Subprogram --
12135 -------------------------
12137 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
12138 Result : Entity_Id;
12141 -- Follow subprogram renaming chain
12144 while Is_Subprogram (Result)
12146 (Is_Generic_Instance (Result)
12147 or else Nkind (Parent (Declaration_Node (Result))) =
12148 N_Subprogram_Renaming_Declaration)
12149 and then Present (Alias (Result))
12151 Result := Alias (Result);
12155 end Get_Base_Subprogram;
12157 --------------------
12158 -- Get_Pragma_Arg --
12159 --------------------
12161 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
12163 if Nkind (Arg) = N_Pragma_Argument_Association then
12164 return Expression (Arg);
12168 end Get_Pragma_Arg;
12174 procedure Initialize is
12179 -----------------------------
12180 -- Is_Config_Static_String --
12181 -----------------------------
12183 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
12185 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
12186 -- This is an internal recursive function that is just like the
12187 -- outer function except that it adds the string to the name buffer
12188 -- rather than placing the string in the name buffer.
12190 ------------------------------
12191 -- Add_Config_Static_String --
12192 ------------------------------
12194 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
12201 if Nkind (N) = N_Op_Concat then
12202 if Add_Config_Static_String (Left_Opnd (N)) then
12203 N := Right_Opnd (N);
12209 if Nkind (N) /= N_String_Literal then
12210 Error_Msg_N ("string literal expected for pragma argument", N);
12214 for J in 1 .. String_Length (Strval (N)) loop
12215 C := Get_String_Char (Strval (N), J);
12217 if not In_Character_Range (C) then
12219 ("string literal contains invalid wide character",
12220 Sloc (N) + 1 + Source_Ptr (J));
12224 Add_Char_To_Name_Buffer (Get_Character (C));
12229 end Add_Config_Static_String;
12231 -- Start of processing for Is_Config_Static_String
12236 return Add_Config_Static_String (Arg);
12237 end Is_Config_Static_String;
12239 -----------------------------------------
12240 -- Is_Non_Significant_Pragma_Reference --
12241 -----------------------------------------
12243 -- This function makes use of the following static table which indicates
12244 -- whether a given pragma is significant. A value of -1 in this table
12245 -- indicates that the reference is significant. A value of zero indicates
12246 -- than appearance as any argument is insignificant, a positive value
12247 -- indicates that appearance in that parameter position is significant.
12249 -- A value of 99 flags a special case requiring a special check (this is
12250 -- used for cases not covered by this standard encoding, e.g. pragma Check
12251 -- where the first argument is not significant, but the others are).
12253 Sig_Flags : constant array (Pragma_Id) of Int :=
12254 (Pragma_AST_Entry => -1,
12255 Pragma_Abort_Defer => -1,
12256 Pragma_Ada_83 => -1,
12257 Pragma_Ada_95 => -1,
12258 Pragma_Ada_05 => -1,
12259 Pragma_Ada_2005 => -1,
12260 Pragma_All_Calls_Remote => -1,
12261 Pragma_Annotate => -1,
12262 Pragma_Assert => -1,
12263 Pragma_Assertion_Policy => 0,
12264 Pragma_Assume_No_Invalid_Values => 0,
12265 Pragma_Asynchronous => -1,
12266 Pragma_Atomic => 0,
12267 Pragma_Atomic_Components => 0,
12268 Pragma_Attach_Handler => -1,
12269 Pragma_Check => 99,
12270 Pragma_Check_Name => 0,
12271 Pragma_Check_Policy => 0,
12272 Pragma_CIL_Constructor => -1,
12273 Pragma_CPP_Class => 0,
12274 Pragma_CPP_Constructor => 0,
12275 Pragma_CPP_Virtual => 0,
12276 Pragma_CPP_Vtable => 0,
12277 Pragma_C_Pass_By_Copy => 0,
12278 Pragma_Comment => 0,
12279 Pragma_Common_Object => -1,
12280 Pragma_Compile_Time_Error => -1,
12281 Pragma_Compile_Time_Warning => -1,
12282 Pragma_Compiler_Unit => 0,
12283 Pragma_Complete_Representation => 0,
12284 Pragma_Complex_Representation => 0,
12285 Pragma_Component_Alignment => -1,
12286 Pragma_Controlled => 0,
12287 Pragma_Convention => 0,
12288 Pragma_Convention_Identifier => 0,
12289 Pragma_Debug => -1,
12290 Pragma_Debug_Policy => 0,
12291 Pragma_Detect_Blocking => -1,
12292 Pragma_Discard_Names => 0,
12293 Pragma_Elaborate => -1,
12294 Pragma_Elaborate_All => -1,
12295 Pragma_Elaborate_Body => -1,
12296 Pragma_Elaboration_Checks => -1,
12297 Pragma_Eliminate => -1,
12298 Pragma_Export => -1,
12299 Pragma_Export_Exception => -1,
12300 Pragma_Export_Function => -1,
12301 Pragma_Export_Object => -1,
12302 Pragma_Export_Procedure => -1,
12303 Pragma_Export_Value => -1,
12304 Pragma_Export_Valued_Procedure => -1,
12305 Pragma_Extend_System => -1,
12306 Pragma_Extensions_Allowed => -1,
12307 Pragma_External => -1,
12308 Pragma_Favor_Top_Level => -1,
12309 Pragma_External_Name_Casing => -1,
12310 Pragma_Fast_Math => -1,
12311 Pragma_Finalize_Storage_Only => 0,
12312 Pragma_Float_Representation => 0,
12313 Pragma_Ident => -1,
12314 Pragma_Implemented_By_Entry => -1,
12315 Pragma_Implicit_Packing => 0,
12316 Pragma_Import => +2,
12317 Pragma_Import_Exception => 0,
12318 Pragma_Import_Function => 0,
12319 Pragma_Import_Object => 0,
12320 Pragma_Import_Procedure => 0,
12321 Pragma_Import_Valued_Procedure => 0,
12322 Pragma_Initialize_Scalars => -1,
12323 Pragma_Inline => 0,
12324 Pragma_Inline_Always => 0,
12325 Pragma_Inline_Generic => 0,
12326 Pragma_Inspection_Point => -1,
12327 Pragma_Interface => +2,
12328 Pragma_Interface_Name => +2,
12329 Pragma_Interrupt_Handler => -1,
12330 Pragma_Interrupt_Priority => -1,
12331 Pragma_Interrupt_State => -1,
12332 Pragma_Java_Constructor => -1,
12333 Pragma_Java_Interface => -1,
12334 Pragma_Keep_Names => 0,
12335 Pragma_License => -1,
12336 Pragma_Link_With => -1,
12337 Pragma_Linker_Alias => -1,
12338 Pragma_Linker_Constructor => -1,
12339 Pragma_Linker_Destructor => -1,
12340 Pragma_Linker_Options => -1,
12341 Pragma_Linker_Section => -1,
12343 Pragma_Locking_Policy => -1,
12344 Pragma_Long_Float => -1,
12345 Pragma_Machine_Attribute => -1,
12347 Pragma_Main_Storage => -1,
12348 Pragma_Memory_Size => -1,
12349 Pragma_No_Return => 0,
12350 Pragma_No_Body => 0,
12351 Pragma_No_Run_Time => -1,
12352 Pragma_No_Strict_Aliasing => -1,
12353 Pragma_Normalize_Scalars => -1,
12354 Pragma_Obsolescent => 0,
12355 Pragma_Optimize => -1,
12356 Pragma_Optimize_Alignment => -1,
12359 Pragma_Passive => -1,
12360 Pragma_Preelaborable_Initialization => -1,
12361 Pragma_Polling => -1,
12362 Pragma_Persistent_BSS => 0,
12363 Pragma_Postcondition => -1,
12364 Pragma_Precondition => -1,
12365 Pragma_Preelaborate => -1,
12366 Pragma_Preelaborate_05 => -1,
12367 Pragma_Priority => -1,
12368 Pragma_Priority_Specific_Dispatching => -1,
12369 Pragma_Profile => 0,
12370 Pragma_Profile_Warnings => 0,
12371 Pragma_Propagate_Exceptions => -1,
12372 Pragma_Psect_Object => -1,
12374 Pragma_Pure_05 => -1,
12375 Pragma_Pure_Function => -1,
12376 Pragma_Queuing_Policy => -1,
12377 Pragma_Ravenscar => -1,
12378 Pragma_Relative_Deadline => -1,
12379 Pragma_Remote_Call_Interface => -1,
12380 Pragma_Remote_Types => -1,
12381 Pragma_Restricted_Run_Time => -1,
12382 Pragma_Restriction_Warnings => -1,
12383 Pragma_Restrictions => -1,
12384 Pragma_Reviewable => -1,
12385 Pragma_Share_Generic => -1,
12386 Pragma_Shared => -1,
12387 Pragma_Shared_Passive => -1,
12388 Pragma_Source_File_Name => -1,
12389 Pragma_Source_File_Name_Project => -1,
12390 Pragma_Source_Reference => -1,
12391 Pragma_Storage_Size => -1,
12392 Pragma_Storage_Unit => -1,
12393 Pragma_Static_Elaboration_Desired => -1,
12394 Pragma_Stream_Convert => -1,
12395 Pragma_Style_Checks => -1,
12396 Pragma_Subtitle => -1,
12397 Pragma_Suppress => 0,
12398 Pragma_Suppress_Exception_Locations => 0,
12399 Pragma_Suppress_All => -1,
12400 Pragma_Suppress_Debug_Info => 0,
12401 Pragma_Suppress_Initialization => 0,
12402 Pragma_System_Name => -1,
12403 Pragma_Task_Dispatching_Policy => -1,
12404 Pragma_Task_Info => -1,
12405 Pragma_Task_Name => -1,
12406 Pragma_Task_Storage => 0,
12407 Pragma_Thread_Local_Storage => 0,
12408 Pragma_Time_Slice => -1,
12409 Pragma_Title => -1,
12410 Pragma_Unchecked_Union => 0,
12411 Pragma_Unimplemented_Unit => -1,
12412 Pragma_Universal_Aliasing => -1,
12413 Pragma_Universal_Data => -1,
12414 Pragma_Unmodified => -1,
12415 Pragma_Unreferenced => -1,
12416 Pragma_Unreferenced_Objects => -1,
12417 Pragma_Unreserve_All_Interrupts => -1,
12418 Pragma_Unsuppress => 0,
12419 Pragma_Use_VADS_Size => -1,
12420 Pragma_Validity_Checks => -1,
12421 Pragma_Volatile => 0,
12422 Pragma_Volatile_Components => 0,
12423 Pragma_Warnings => -1,
12424 Pragma_Weak_External => -1,
12425 Pragma_Wide_Character_Encoding => 0,
12426 Unknown_Pragma => 0);
12428 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
12437 if Nkind (P) /= N_Pragma_Argument_Association then
12441 Id := Get_Pragma_Id (Parent (P));
12442 C := Sig_Flags (Id);
12454 -- For pragma Check, the first argument is not significant,
12455 -- the second and the third (if present) arguments are
12458 when Pragma_Check =>
12460 P = First (Pragma_Argument_Associations (Parent (P)));
12463 raise Program_Error;
12467 A := First (Pragma_Argument_Associations (Parent (P)));
12468 for J in 1 .. C - 1 loop
12476 return A = P; -- is this wrong way round ???
12479 end Is_Non_Significant_Pragma_Reference;
12481 ------------------------------
12482 -- Is_Pragma_String_Literal --
12483 ------------------------------
12485 -- This function returns true if the corresponding pragma argument is
12486 -- a static string expression. These are the only cases in which string
12487 -- literals can appear as pragma arguments. We also allow a string
12488 -- literal as the first argument to pragma Assert (although it will
12489 -- of course always generate a type error).
12491 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
12492 Pragn : constant Node_Id := Parent (Par);
12493 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
12494 Pname : constant Name_Id := Pragma_Name (Pragn);
12500 N := First (Assoc);
12507 if Pname = Name_Assert then
12510 elsif Pname = Name_Export then
12513 elsif Pname = Name_Ident then
12516 elsif Pname = Name_Import then
12519 elsif Pname = Name_Interface_Name then
12522 elsif Pname = Name_Linker_Alias then
12525 elsif Pname = Name_Linker_Section then
12528 elsif Pname = Name_Machine_Attribute then
12531 elsif Pname = Name_Source_File_Name then
12534 elsif Pname = Name_Source_Reference then
12537 elsif Pname = Name_Title then
12540 elsif Pname = Name_Subtitle then
12546 end Is_Pragma_String_Literal;
12548 --------------------------------------
12549 -- Process_Compilation_Unit_Pragmas --
12550 --------------------------------------
12552 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
12554 -- A special check for pragma Suppress_All. This is a strange DEC
12555 -- pragma, strange because it comes at the end of the unit. If we
12556 -- have a pragma Suppress_All in the Pragmas_After of the current
12557 -- unit, then we insert a pragma Suppress (All_Checks) at the start
12558 -- of the context clause to ensure the correct processing.
12561 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
12565 if Present (PA) then
12567 while Present (P) loop
12568 if Pragma_Name (P) = Name_Suppress_All then
12569 Prepend_To (Context_Items (N),
12570 Make_Pragma (Sloc (P),
12571 Chars => Name_Suppress,
12572 Pragma_Argument_Associations => New_List (
12573 Make_Pragma_Argument_Association (Sloc (P),
12575 Make_Identifier (Sloc (P),
12576 Chars => Name_All_Checks)))));
12584 end Process_Compilation_Unit_Pragmas;
12595 --------------------------------
12596 -- Set_Encoded_Interface_Name --
12597 --------------------------------
12599 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
12600 Str : constant String_Id := Strval (S);
12601 Len : constant Int := String_Length (Str);
12606 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
12609 -- Stores encoded value of character code CC. The encoding we
12610 -- use an underscore followed by four lower case hex digits.
12616 procedure Encode is
12618 Store_String_Char (Get_Char_Code ('_'));
12620 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
12622 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
12624 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
12626 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
12629 -- Start of processing for Set_Encoded_Interface_Name
12632 -- If first character is asterisk, this is a link name, and we
12633 -- leave it completely unmodified. We also ignore null strings
12634 -- (the latter case happens only in error cases) and no encoding
12635 -- should occur for Java or AAMP interface names.
12638 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
12639 or else VM_Target /= No_VM
12640 or else AAMP_On_Target
12642 Set_Interface_Name (E, S);
12647 CC := Get_String_Char (Str, J);
12649 exit when not In_Character_Range (CC);
12651 C := Get_Character (CC);
12653 exit when C /= '_' and then C /= '$'
12654 and then C not in '0' .. '9'
12655 and then C not in 'a' .. 'z'
12656 and then C not in 'A' .. 'Z';
12659 Set_Interface_Name (E, S);
12667 -- Here we need to encode. The encoding we use as follows:
12668 -- three underscores + four hex digits (lower case)
12672 for J in 1 .. String_Length (Str) loop
12673 CC := Get_String_Char (Str, J);
12675 if not In_Character_Range (CC) then
12678 C := Get_Character (CC);
12680 if C = '_' or else C = '$'
12681 or else C in '0' .. '9'
12682 or else C in 'a' .. 'z'
12683 or else C in 'A' .. 'Z'
12685 Store_String_Char (CC);
12692 Set_Interface_Name (E,
12693 Make_String_Literal (Sloc (S),
12694 Strval => End_String));
12696 end Set_Encoded_Interface_Name;
12698 -------------------
12699 -- Set_Unit_Name --
12700 -------------------
12702 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
12707 if Nkind (N) = N_Identifier
12708 and then Nkind (With_Item) = N_Identifier
12710 Set_Entity (N, Entity (With_Item));
12712 elsif Nkind (N) = N_Selected_Component then
12713 Change_Selected_Component_To_Expanded_Name (N);
12714 Set_Entity (N, Entity (With_Item));
12715 Set_Entity (Selector_Name (N), Entity (N));
12717 Pref := Prefix (N);
12718 Scop := Scope (Entity (N));
12719 while Nkind (Pref) = N_Selected_Component loop
12720 Change_Selected_Component_To_Expanded_Name (Pref);
12721 Set_Entity (Selector_Name (Pref), Scop);
12722 Set_Entity (Pref, Scop);
12723 Pref := Prefix (Pref);
12724 Scop := Scope (Scop);
12727 Set_Entity (Pref, Scop);