1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- This unit contains the semantic processing for all pragmas, both language
27 -- and implementation defined. For most pragmas, the parser only does the
28 -- most basic job of checking the syntax, so Sem_Prag also contains the code
29 -- to complete the syntax checks. Certain pragmas are handled partially or
30 -- completely by the parser (see Par.Prag for further details).
32 with Atree; use Atree;
33 with Casing; use Casing;
34 with Checks; use Checks;
35 with Csets; use Csets;
36 with Debug; use Debug;
37 with Einfo; use Einfo;
38 with Errout; use Errout;
39 with Exp_Dist; use Exp_Dist;
41 with Lib.Writ; use Lib.Writ;
42 with Lib.Xref; use Lib.Xref;
43 with Namet; use Namet;
44 with Namet.Sp; use Namet.Sp;
45 with Nlists; use Nlists;
46 with Nmake; use Nmake;
48 with Output; use Output;
49 with Restrict; use Restrict;
50 with Rident; use Rident;
51 with Rtsfind; use Rtsfind;
53 with Sem_Ch3; use Sem_Ch3;
54 with Sem_Ch8; use Sem_Ch8;
55 with Sem_Ch13; use Sem_Ch13;
56 with Sem_Dist; use Sem_Dist;
57 with Sem_Elim; use Sem_Elim;
58 with Sem_Eval; use Sem_Eval;
59 with Sem_Intr; use Sem_Intr;
60 with Sem_Mech; use Sem_Mech;
61 with Sem_Res; use Sem_Res;
62 with Sem_Type; use Sem_Type;
63 with Sem_Util; use Sem_Util;
64 with Sem_VFpt; use Sem_VFpt;
65 with Sem_Warn; use Sem_Warn;
66 with Stand; use Stand;
67 with Sinfo; use Sinfo;
68 with Sinfo.CN; use Sinfo.CN;
69 with Sinput; use Sinput;
70 with Snames; use Snames;
71 with Stringt; use Stringt;
72 with Stylesw; use Stylesw;
74 with Targparm; use Targparm;
75 with Tbuild; use Tbuild;
77 with Uintp; use Uintp;
78 with Uname; use Uname;
79 with Urealp; use Urealp;
80 with Validsw; use Validsw;
82 package body Sem_Prag is
84 ----------------------------------------------
85 -- Common Handling of Import-Export Pragmas --
86 ----------------------------------------------
88 -- In the following section, a number of Import_xxx and Export_xxx
89 -- pragmas are defined by GNAT. These are compatible with the DEC
90 -- pragmas of the same name, and all have the following common
91 -- form and processing:
94 -- [Internal =>] LOCAL_NAME
95 -- [, [External =>] EXTERNAL_SYMBOL]
96 -- [, other optional parameters ]);
99 -- [Internal =>] LOCAL_NAME
100 -- [, [External =>] EXTERNAL_SYMBOL]
101 -- [, other optional parameters ]);
103 -- EXTERNAL_SYMBOL ::=
105 -- | static_string_EXPRESSION
107 -- The internal LOCAL_NAME designates the entity that is imported or
108 -- exported, and must refer to an entity in the current declarative
109 -- part (as required by the rules for LOCAL_NAME).
111 -- The external linker name is designated by the External parameter
112 -- if given, or the Internal parameter if not (if there is no External
113 -- parameter, the External parameter is a copy of the Internal name).
115 -- If the External parameter is given as a string, then this string
116 -- is treated as an external name (exactly as though it had been given
117 -- as an External_Name parameter for a normal Import pragma).
119 -- If the External parameter is given as an identifier (or there is no
120 -- External parameter, so that the Internal identifier is used), then
121 -- the external name is the characters of the identifier, translated
122 -- to all upper case letters for OpenVMS versions of GNAT, and to all
123 -- lower case letters for all other versions
125 -- Note: the external name specified or implied by any of these special
126 -- Import_xxx or Export_xxx pragmas override an external or link name
127 -- specified in a previous Import or Export pragma.
129 -- Note: these and all other DEC-compatible GNAT pragmas allow full
130 -- use of named notation, following the standard rules for subprogram
131 -- calls, i.e. parameters can be given in any order if named notation
132 -- is used, and positional and named notation can be mixed, subject to
133 -- the rule that all positional parameters must appear first.
135 -- Note: All these pragmas are implemented exactly following the DEC
136 -- design and implementation and are intended to be fully compatible
137 -- with the use of these pragmas in the DEC Ada compiler.
139 --------------------------------------------
140 -- Checking for Duplicated External Names --
141 --------------------------------------------
143 -- It is suspicious if two separate Export pragmas use the same external
144 -- name. The following table is used to diagnose this situation so that
145 -- an appropriate warning can be issued.
147 -- The Node_Id stored is for the N_String_Literal node created to
148 -- hold the value of the external name. The Sloc of this node is
149 -- used to cross-reference the location of the duplication.
151 package Externals is new Table.Table (
152 Table_Component_Type => Node_Id,
153 Table_Index_Type => Int,
154 Table_Low_Bound => 0,
155 Table_Initial => 100,
156 Table_Increment => 100,
157 Table_Name => "Name_Externals");
159 -------------------------------------
160 -- Local Subprograms and Variables --
161 -------------------------------------
163 function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
164 -- This routine is used for possible casing adjustment of an explicit
165 -- external name supplied as a string literal (the node N), according
166 -- to the casing requirement of Opt.External_Name_Casing. If this is
167 -- set to As_Is, then the string literal is returned unchanged, but if
168 -- it is set to Uppercase or Lowercase, then a new string literal with
169 -- appropriate casing is constructed.
171 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
172 -- If Def_Id refers to a renamed subprogram, then the base subprogram
173 -- (the original one, following the renaming chain) is returned.
174 -- Otherwise the entity is returned unchanged. Should be in Einfo???
177 -- This is a dummy function called by the processing for pragma Reviewable.
178 -- It is there for assisting front end debugging. By placing a Reviewable
179 -- pragma in the source program, a breakpoint on rv catches this place in
180 -- the source, allowing convenient stepping to the point of interest.
182 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
183 -- Place semantic information on the argument of an Elaborate or
184 -- Elaborate_All pragma. Entity name for unit and its parents is
185 -- taken from item in previous with_clause that mentions the unit.
187 -------------------------------
188 -- Adjust_External_Name_Case --
189 -------------------------------
191 function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
195 -- Adjust case of literal if required
197 if Opt.External_Name_Exp_Casing = As_Is then
201 -- Copy existing string
207 for J in 1 .. String_Length (Strval (N)) loop
208 CC := Get_String_Char (Strval (N), J);
210 if Opt.External_Name_Exp_Casing = Uppercase
211 and then CC >= Get_Char_Code ('a')
212 and then CC <= Get_Char_Code ('z')
214 Store_String_Char (CC - 32);
216 elsif Opt.External_Name_Exp_Casing = Lowercase
217 and then CC >= Get_Char_Code ('A')
218 and then CC <= Get_Char_Code ('Z')
220 Store_String_Char (CC + 32);
223 Store_String_Char (CC);
228 Make_String_Literal (Sloc (N),
229 Strval => End_String);
231 end Adjust_External_Name_Case;
237 procedure Analyze_Pragma (N : Node_Id) is
238 Loc : constant Source_Ptr := Sloc (N);
239 Pname : constant Name_Id := Pragma_Name (N);
242 Pragma_Exit : exception;
243 -- This exception is used to exit pragma processing completely. It
244 -- is used when an error is detected, and no further processing is
245 -- required. It is also used if an earlier error has left the tree
246 -- in a state where the pragma should not be processed.
249 -- Number of pragma argument associations
255 -- First four pragma arguments (pragma argument association nodes,
256 -- or Empty if the corresponding argument does not exist).
258 type Name_List is array (Natural range <>) of Name_Id;
259 type Args_List is array (Natural range <>) of Node_Id;
260 -- Types used for arguments to Check_Arg_Order and Gather_Associations
262 procedure Ada_2005_Pragma;
263 -- Called for pragmas defined in Ada 2005, that are not in Ada 95. In
264 -- Ada 95 mode, these are implementation defined pragmas, so should be
265 -- caught by the No_Implementation_Pragmas restriction
267 procedure Check_Ada_83_Warning;
268 -- Issues a warning message for the current pragma if operating in Ada
269 -- 83 mode (used for language pragmas that are not a standard part of
270 -- Ada 83). This procedure does not raise Error_Pragma. Also notes use
273 procedure Check_Arg_Count (Required : Nat);
274 -- Check argument count for pragma is equal to given parameter.
275 -- If not, then issue an error message and raise Pragma_Exit.
277 -- Note: all routines whose name is Check_Arg_Is_xxx take an
278 -- argument Arg which can either be a pragma argument association,
279 -- in which case the check is applied to the expression of the
280 -- association or an expression directly.
282 procedure Check_Arg_Is_External_Name (Arg : Node_Id);
283 -- Check that an argument has the right form for an EXTERNAL_NAME
284 -- parameter of an extended import/export pragma. The rule is that
285 -- the name must be an identifier or string literal (in Ada 83 mode)
286 -- or a static string expression (in Ada 95 mode).
288 procedure Check_Arg_Is_Identifier (Arg : Node_Id);
289 -- Check the specified argument Arg to make sure that it is an
290 -- identifier. If not give error and raise Pragma_Exit.
292 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
293 -- Check the specified argument Arg to make sure that it is an
294 -- integer literal. If not give error and raise Pragma_Exit.
296 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
297 -- Check the specified argument Arg to make sure that it has the
298 -- proper syntactic form for a local name and meets the semantic
299 -- requirements for a local name. The local name is analyzed as
300 -- part of the processing for this call. In addition, the local
301 -- name is required to represent an entity at the library level.
303 procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
304 -- Check the specified argument Arg to make sure that it has the
305 -- proper syntactic form for a local name and meets the semantic
306 -- requirements for a local name. The local name is analyzed as
307 -- part of the processing for this call.
309 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
310 -- Check the specified argument Arg to make sure that it is a valid
311 -- locking policy name. If not give error and raise Pragma_Exit.
313 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
314 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
315 -- Check the specified argument Arg to make sure that it is an
316 -- identifier whose name matches either N1 or N2 (or N3 if present).
317 -- If not then give error and raise Pragma_Exit.
319 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
320 -- Check the specified argument Arg to make sure that it is a valid
321 -- queuing policy name. If not give error and raise Pragma_Exit.
323 procedure Check_Arg_Is_Static_Expression
326 -- Check the specified argument Arg to make sure that it is a static
327 -- expression of the given type (i.e. it will be analyzed and resolved
328 -- using this type, which can be any valid argument to Resolve, e.g.
329 -- Any_Integer is OK). If not, given error and raise Pragma_Exit.
331 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
332 -- Check the specified argument Arg to make sure that it is a
333 -- string literal. If not give error and raise Pragma_Exit
335 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
336 -- Check the specified argument Arg to make sure that it is a valid
337 -- valid task dispatching policy name. If not give error and raise
340 procedure Check_Arg_Order (Names : Name_List);
341 -- Checks for an instance of two arguments with identifiers for the
342 -- current pragma which are not in the sequence indicated by Names,
343 -- and if so, generates a fatal message about bad order of arguments.
345 procedure Check_At_Least_N_Arguments (N : Nat);
346 -- Check there are at least N arguments present
348 procedure Check_At_Most_N_Arguments (N : Nat);
349 -- Check there are no more than N arguments present
351 procedure Check_Component (Comp : Node_Id);
352 -- Examine Unchecked_Union component for correct use of per-object
353 -- constrained subtypes, and for restrictions on finalizable components.
355 procedure Check_Duplicated_Export_Name (Nam : Node_Id);
356 -- Nam is an N_String_Literal node containing the external name set
357 -- by an Import or Export pragma (or extended Import or Export pragma).
358 -- This procedure checks for possible duplications if this is the
359 -- export case, and if found, issues an appropriate error message.
361 procedure Check_First_Subtype (Arg : Node_Id);
362 -- Checks that Arg, whose expression is an entity name referencing
363 -- a subtype, does not reference a type that is not a first subtype.
365 procedure Check_In_Main_Program;
366 -- Common checks for pragmas that appear within a main program
367 -- (Priority, Main_Storage, Time_Slice).
369 procedure Check_Interrupt_Or_Attach_Handler;
370 -- Common processing for first argument of pragma Interrupt_Handler
371 -- or pragma Attach_Handler.
373 procedure Check_Is_In_Decl_Part_Or_Package_Spec;
374 -- Check that pragma appears in a declarative part, or in a package
375 -- specification, i.e. that it does not occur in a statement sequence
378 procedure Check_No_Identifier (Arg : Node_Id);
379 -- Checks that the given argument does not have an identifier. If
380 -- an identifier is present, then an error message is issued, and
381 -- Pragma_Exit is raised.
383 procedure Check_No_Identifiers;
384 -- Checks that none of the arguments to the pragma has an identifier.
385 -- If any argument has an identifier, then an error message is issued,
386 -- and Pragma_Exit is raised.
388 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
389 -- Checks if the given argument has an identifier, and if so, requires
390 -- it to match the given identifier name. If there is a non-matching
391 -- identifier, then an error message is given and Error_Pragmas raised.
393 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
394 -- Checks if the given argument has an identifier, and if so, requires
395 -- it to match the given identifier name. If there is a non-matching
396 -- identifier, then an error message is given and Error_Pragmas raised.
397 -- In this version of the procedure, the identifier name is given as
398 -- a string with lower case letters.
400 procedure Check_Static_Constraint (Constr : Node_Id);
401 -- Constr is a constraint from an N_Subtype_Indication node from a
402 -- component constraint in an Unchecked_Union type. This routine checks
403 -- that the constraint is static as required by the restrictions for
406 procedure Check_Valid_Configuration_Pragma;
407 -- Legality checks for placement of a configuration pragma
409 procedure Check_Valid_Library_Unit_Pragma;
410 -- Legality checks for library unit pragmas. A special case arises for
411 -- pragmas in generic instances that come from copies of the original
412 -- library unit pragmas in the generic templates. In the case of other
413 -- than library level instantiations these can appear in contexts which
414 -- would normally be invalid (they only apply to the original template
415 -- and to library level instantiations), and they are simply ignored,
416 -- which is implemented by rewriting them as null statements.
418 procedure Check_Variant (Variant : Node_Id);
419 -- Check Unchecked_Union variant for lack of nested variants and
420 -- presence of at least one component.
422 procedure Error_Pragma (Msg : String);
423 pragma No_Return (Error_Pragma);
424 -- Outputs error message for current pragma. The message contains a %
425 -- that will be replaced with the pragma name, and the flag is placed
426 -- on the pragma itself. Pragma_Exit is then raised.
428 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
429 pragma No_Return (Error_Pragma_Arg);
430 -- Outputs error message for current pragma. The message may contain
431 -- a % that will be replaced with the pragma name. The parameter Arg
432 -- may either be a pragma argument association, in which case the flag
433 -- is placed on the expression of this association, or an expression,
434 -- in which case the flag is placed directly on the expression. The
435 -- message is placed using Error_Msg_N, so the message may also contain
436 -- an & insertion character which will reference the given Arg value.
437 -- After placing the message, Pragma_Exit is raised.
439 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
440 pragma No_Return (Error_Pragma_Arg);
441 -- Similar to above form of Error_Pragma_Arg except that two messages
442 -- are provided, the second is a continuation comment starting with \.
444 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
445 pragma No_Return (Error_Pragma_Arg_Ident);
446 -- Outputs error message for current pragma. The message may contain
447 -- a % that will be replaced with the pragma name. The parameter Arg
448 -- must be a pragma argument association with a non-empty identifier
449 -- (i.e. its Chars field must be set), and the error message is placed
450 -- on the identifier. The message is placed using Error_Msg_N so
451 -- the message may also contain an & insertion character which will
452 -- reference the identifier. After placing the message, Pragma_Exit
455 function Find_Lib_Unit_Name return Entity_Id;
456 -- Used for a library unit pragma to find the entity to which the
457 -- library unit pragma applies, returns the entity found.
459 procedure Find_Program_Unit_Name (Id : Node_Id);
460 -- If the pragma is a compilation unit pragma, the id must denote the
461 -- compilation unit in the same compilation, and the pragma must appear
462 -- in the list of preceding or trailing pragmas. If it is a program
463 -- unit pragma that is not a compilation unit pragma, then the
464 -- identifier must be visible.
466 function Find_Unique_Parameterless_Procedure
468 Arg : Node_Id) return Entity_Id;
469 -- Used for a procedure pragma to find the unique parameterless
470 -- procedure identified by Name, returns it if it exists, otherwise
471 -- errors out and uses Arg as the pragma argument for the message.
473 procedure Gather_Associations
475 Args : out Args_List);
476 -- This procedure is used to gather the arguments for a pragma that
477 -- permits arbitrary ordering of parameters using the normal rules
478 -- for named and positional parameters. The Names argument is a list
479 -- of Name_Id values that corresponds to the allowed pragma argument
480 -- association identifiers in order. The result returned in Args is
481 -- a list of corresponding expressions that are the pragma arguments.
482 -- Note that this is a list of expressions, not of pragma argument
483 -- associations (Gather_Associations has completely checked all the
484 -- optional identifiers when it returns). An entry in Args is Empty
485 -- on return if the corresponding argument is not present.
487 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
488 -- All the routines that check pragma arguments take either a pragma
489 -- argument association (in which case the expression of the argument
490 -- association is checked), or the expression directly. The function
491 -- Get_Pragma_Arg is a utility used to deal with these two cases. If
492 -- Arg is a pragma argument association node, then its expression is
493 -- returned, otherwise Arg is returned unchanged.
495 procedure GNAT_Pragma;
496 -- Called for all GNAT defined pragmas to check the relevant restriction
497 -- (No_Implementation_Pragmas).
499 function Is_Before_First_Decl
500 (Pragma_Node : Node_Id;
501 Decls : List_Id) return Boolean;
502 -- Return True if Pragma_Node is before the first declarative item in
503 -- Decls where Decls is the list of declarative items.
505 function Is_Configuration_Pragma return Boolean;
506 -- Deterermines if the placement of the current pragma is appropriate
507 -- for a configuration pragma.
509 function Is_In_Context_Clause return Boolean;
510 -- Returns True if pragma appears within the context clause of a unit,
511 -- and False for any other placement (does not generate any messages).
513 function Is_Static_String_Expression (Arg : Node_Id) return Boolean;
514 -- Analyzes the argument, and determines if it is a static string
515 -- expression, returns True if so, False if non-static or not String.
517 procedure Pragma_Misplaced;
518 -- Issue fatal error message for misplaced pragma
520 procedure Process_Atomic_Shared_Volatile;
521 -- Common processing for pragmas Atomic, Shared, Volatile. Note that
522 -- Shared is an obsolete Ada 83 pragma, treated as being identical
523 -- in effect to pragma Atomic.
525 procedure Process_Compile_Time_Warning_Or_Error;
526 -- Common processing for Compile_Time_Error and Compile_Time_Warning
528 procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
529 -- Common procesing for Convention, Interface, Import and Export.
530 -- Checks first two arguments of pragma, and sets the appropriate
531 -- convention value in the specified entity or entities. On return
532 -- C is the convention, E is the referenced entity.
534 procedure Process_Extended_Import_Export_Exception_Pragma
535 (Arg_Internal : Node_Id;
536 Arg_External : Node_Id;
539 -- Common processing for the pragmas Import/Export_Exception.
540 -- The three arguments correspond to the three named parameters of
541 -- the pragma. An argument is empty if the corresponding parameter
542 -- is not present in the pragma.
544 procedure Process_Extended_Import_Export_Object_Pragma
545 (Arg_Internal : Node_Id;
546 Arg_External : Node_Id;
548 -- Common processing for the pragmass Import/Export_Object.
549 -- The three arguments correspond to the three named parameters
550 -- of the pragmas. An argument is empty if the corresponding
551 -- parameter is not present in the pragma.
553 procedure Process_Extended_Import_Export_Internal_Arg
554 (Arg_Internal : Node_Id := Empty);
555 -- Common processing for all extended Import and Export pragmas. The
556 -- argument is the pragma parameter for the Internal argument. If
557 -- Arg_Internal is empty or inappropriate, an error message is posted.
558 -- Otherwise, on normal return, the Entity_Field of Arg_Internal is
559 -- set to identify the referenced entity.
561 procedure Process_Extended_Import_Export_Subprogram_Pragma
562 (Arg_Internal : Node_Id;
563 Arg_External : Node_Id;
564 Arg_Parameter_Types : Node_Id;
565 Arg_Result_Type : Node_Id := Empty;
566 Arg_Mechanism : Node_Id;
567 Arg_Result_Mechanism : Node_Id := Empty;
568 Arg_First_Optional_Parameter : Node_Id := Empty);
569 -- Common processing for all extended Import and Export pragmas
570 -- applying to subprograms. The caller omits any arguments that do
571 -- bnot apply to the pragma in question (for example, Arg_Result_Type
572 -- can be non-Empty only in the Import_Function and Export_Function
573 -- cases). The argument names correspond to the allowed pragma
574 -- association identifiers.
576 procedure Process_Generic_List;
577 -- Common processing for Share_Generic and Inline_Generic
579 procedure Process_Import_Or_Interface;
580 -- Common processing for Import of Interface
582 procedure Process_Inline (Active : Boolean);
583 -- Common processing for Inline and Inline_Always. The parameter
584 -- indicates if the inline pragma is active, i.e. if it should
585 -- actually cause inlining to occur.
587 procedure Process_Interface_Name
588 (Subprogram_Def : Entity_Id;
591 -- Given the last two arguments of pragma Import, pragma Export, or
592 -- pragma Interface_Name, performs validity checks and sets the
593 -- Interface_Name field of the given subprogram entity to the
594 -- appropriate external or link name, depending on the arguments
595 -- given. Ext_Arg is always present, but Link_Arg may be missing.
596 -- Note that Ext_Arg may represent the Link_Name if Link_Arg is
597 -- missing, and appropriate named notation is used for Ext_Arg.
598 -- If neither Ext_Arg nor Link_Arg is present, the interface name
599 -- is set to the default from the subprogram name.
601 procedure Process_Interrupt_Or_Attach_Handler;
602 -- Common processing for Interrupt and Attach_Handler pragmas
604 procedure Process_Restrictions_Or_Restriction_Warnings (Warn : Boolean);
605 -- Common processing for Restrictions and Restriction_Warnings pragmas.
606 -- Warn is False for Restrictions, True for Restriction_Warnings.
608 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
609 -- Common processing for Suppress and Unsuppress. The boolean parameter
610 -- Suppress_Case is True for the Suppress case, and False for the
613 procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
614 -- This procedure sets the Is_Exported flag for the given entity,
615 -- checking that the entity was not previously imported. Arg is
616 -- the argument that specified the entity. A check is also made
617 -- for exporting inappropriate entities.
619 procedure Set_Extended_Import_Export_External_Name
620 (Internal_Ent : Entity_Id;
621 Arg_External : Node_Id);
622 -- Common processing for all extended import export pragmas. The first
623 -- argument, Internal_Ent, is the internal entity, which has already
624 -- been checked for validity by the caller. Arg_External is from the
625 -- Import or Export pragma, and may be null if no External parameter
626 -- was present. If Arg_External is present and is a non-null string
627 -- (a null string is treated as the default), then the Interface_Name
628 -- field of Internal_Ent is set appropriately.
630 procedure Set_Imported (E : Entity_Id);
631 -- This procedure sets the Is_Imported flag for the given entity,
632 -- checking that it is not previously exported or imported.
634 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
635 -- Mech is a parameter passing mechanism (see Import_Function syntax
636 -- for MECHANISM_NAME). This routine checks that the mechanism argument
637 -- has the right form, and if not issues an error message. If the
638 -- argument has the right form then the Mechanism field of Ent is
639 -- set appropriately.
641 procedure Set_Ravenscar_Profile (N : Node_Id);
642 -- Activate the set of configuration pragmas and restrictions that
643 -- make up the Ravenscar Profile. N is the corresponding pragma
644 -- node, which is used for error messages on any constructs
645 -- that violate the profile.
647 ---------------------
648 -- Ada_2005_Pragma --
649 ---------------------
651 procedure Ada_2005_Pragma is
653 if Ada_Version <= Ada_95 then
654 Check_Restriction (No_Implementation_Pragmas, N);
658 --------------------------
659 -- Check_Ada_83_Warning --
660 --------------------------
662 procedure Check_Ada_83_Warning is
664 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
665 Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
667 end Check_Ada_83_Warning;
669 ---------------------
670 -- Check_Arg_Count --
671 ---------------------
673 procedure Check_Arg_Count (Required : Nat) is
675 if Arg_Count /= Required then
676 Error_Pragma ("wrong number of arguments for pragma%");
680 --------------------------------
681 -- Check_Arg_Is_External_Name --
682 --------------------------------
684 procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
685 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
688 if Nkind (Argx) = N_Identifier then
692 Analyze_And_Resolve (Argx, Standard_String);
694 if Is_OK_Static_Expression (Argx) then
697 elsif Etype (Argx) = Any_Type then
700 -- An interesting special case, if we have a string literal and
701 -- we are in Ada 83 mode, then we allow it even though it will
702 -- not be flagged as static. This allows expected Ada 83 mode
703 -- use of external names which are string literals, even though
704 -- technically these are not static in Ada 83.
706 elsif Ada_Version = Ada_83
707 and then Nkind (Argx) = N_String_Literal
711 -- Static expression that raises Constraint_Error. This has
712 -- already been flagged, so just exit from pragma processing.
714 elsif Is_Static_Expression (Argx) then
717 -- Here we have a real error (non-static expression)
720 Error_Msg_Name_1 := Pname;
722 ("argument for pragma% must be a identifier or " &
723 "static string expression!", Argx);
727 end Check_Arg_Is_External_Name;
729 -----------------------------
730 -- Check_Arg_Is_Identifier --
731 -----------------------------
733 procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
734 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
736 if Nkind (Argx) /= N_Identifier then
738 ("argument for pragma% must be identifier", Argx);
740 end Check_Arg_Is_Identifier;
742 ----------------------------------
743 -- Check_Arg_Is_Integer_Literal --
744 ----------------------------------
746 procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
747 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
749 if Nkind (Argx) /= N_Integer_Literal then
751 ("argument for pragma% must be integer literal", Argx);
753 end Check_Arg_Is_Integer_Literal;
755 -------------------------------------------
756 -- Check_Arg_Is_Library_Level_Local_Name --
757 -------------------------------------------
761 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
762 -- | library_unit_NAME
764 procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
766 Check_Arg_Is_Local_Name (Arg);
768 if not Is_Library_Level_Entity (Entity (Expression (Arg)))
769 and then Comes_From_Source (N)
772 ("argument for pragma% must be library level entity", Arg);
774 end Check_Arg_Is_Library_Level_Local_Name;
776 -----------------------------
777 -- Check_Arg_Is_Local_Name --
778 -----------------------------
782 -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
783 -- | library_unit_NAME
785 procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
786 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
791 if Nkind (Argx) not in N_Direct_Name
792 and then (Nkind (Argx) /= N_Attribute_Reference
793 or else Present (Expressions (Argx))
794 or else Nkind (Prefix (Argx)) /= N_Identifier)
795 and then (not Is_Entity_Name (Argx)
796 or else not Is_Compilation_Unit (Entity (Argx)))
798 Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
801 if Is_Entity_Name (Argx)
802 and then Scope (Entity (Argx)) /= Current_Scope
805 ("pragma% argument must be in same declarative part", Arg);
807 end Check_Arg_Is_Local_Name;
809 ---------------------------------
810 -- Check_Arg_Is_Locking_Policy --
811 ---------------------------------
813 procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
814 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
817 Check_Arg_Is_Identifier (Argx);
819 if not Is_Locking_Policy_Name (Chars (Argx)) then
821 ("& is not a valid locking policy name", Argx);
823 end Check_Arg_Is_Locking_Policy;
825 -------------------------
826 -- Check_Arg_Is_One_Of --
827 -------------------------
829 procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
830 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
833 Check_Arg_Is_Identifier (Argx);
835 if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
836 Error_Msg_Name_2 := N1;
837 Error_Msg_Name_3 := N2;
838 Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
840 end Check_Arg_Is_One_Of;
842 procedure Check_Arg_Is_One_Of
844 N1, N2, N3 : Name_Id)
846 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
849 Check_Arg_Is_Identifier (Argx);
851 if Chars (Argx) /= N1
852 and then Chars (Argx) /= N2
853 and then Chars (Argx) /= N3
855 Error_Pragma_Arg ("invalid argument for pragma%", Argx);
857 end Check_Arg_Is_One_Of;
859 ---------------------------------
860 -- Check_Arg_Is_Queuing_Policy --
861 ---------------------------------
863 procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
864 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
867 Check_Arg_Is_Identifier (Argx);
869 if not Is_Queuing_Policy_Name (Chars (Argx)) then
871 ("& is not a valid queuing policy name", Argx);
873 end Check_Arg_Is_Queuing_Policy;
875 ------------------------------------
876 -- Check_Arg_Is_Static_Expression --
877 ------------------------------------
879 procedure Check_Arg_Is_Static_Expression
883 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
886 Analyze_And_Resolve (Argx, Typ);
888 if Is_OK_Static_Expression (Argx) then
891 elsif Etype (Argx) = Any_Type then
894 -- An interesting special case, if we have a string literal and
895 -- we are in Ada 83 mode, then we allow it even though it will
896 -- not be flagged as static. This allows the use of Ada 95
897 -- pragmas like Import in Ada 83 mode. They will of course be
898 -- flagged with warnings as usual, but will not cause errors.
900 elsif Ada_Version = Ada_83
901 and then Nkind (Argx) = N_String_Literal
905 -- Static expression that raises Constraint_Error. This has
906 -- already been flagged, so just exit from pragma processing.
908 elsif Is_Static_Expression (Argx) then
911 -- Finally, we have a real error
914 Error_Msg_Name_1 := Pname;
916 ("argument for pragma% must be a static expression!", Argx);
919 end Check_Arg_Is_Static_Expression;
921 ---------------------------------
922 -- Check_Arg_Is_String_Literal --
923 ---------------------------------
925 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
926 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
928 if Nkind (Argx) /= N_String_Literal then
930 ("argument for pragma% must be string literal", Argx);
932 end Check_Arg_Is_String_Literal;
934 ------------------------------------------
935 -- Check_Arg_Is_Task_Dispatching_Policy --
936 ------------------------------------------
938 procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
939 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
942 Check_Arg_Is_Identifier (Argx);
944 if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
946 ("& is not a valid task dispatching policy name", Argx);
948 end Check_Arg_Is_Task_Dispatching_Policy;
950 ---------------------
951 -- Check_Arg_Order --
952 ---------------------
954 procedure Check_Arg_Order (Names : Name_List) is
957 Highest_So_Far : Natural := 0;
958 -- Highest index in Names seen do far
962 for J in 1 .. Arg_Count loop
963 if Chars (Arg) /= No_Name then
964 for K in Names'Range loop
965 if Chars (Arg) = Names (K) then
966 if K < Highest_So_Far then
967 Error_Msg_Name_1 := Pname;
969 ("parameters out of order for pragma%", Arg);
970 Error_Msg_Name_1 := Names (K);
971 Error_Msg_Name_2 := Names (Highest_So_Far);
972 Error_Msg_N ("\% must appear before %", Arg);
986 --------------------------------
987 -- Check_At_Least_N_Arguments --
988 --------------------------------
990 procedure Check_At_Least_N_Arguments (N : Nat) is
992 if Arg_Count < N then
993 Error_Pragma ("too few arguments for pragma%");
995 end Check_At_Least_N_Arguments;
997 -------------------------------
998 -- Check_At_Most_N_Arguments --
999 -------------------------------
1001 procedure Check_At_Most_N_Arguments (N : Nat) is
1004 if Arg_Count > N then
1006 for J in 1 .. N loop
1008 Error_Pragma_Arg ("too many arguments for pragma%", Arg);
1011 end Check_At_Most_N_Arguments;
1013 ---------------------
1014 -- Check_Component --
1015 ---------------------
1017 procedure Check_Component (Comp : Node_Id) is
1019 if Nkind (Comp) = N_Component_Declaration then
1021 Sindic : constant Node_Id :=
1022 Subtype_Indication (Component_Definition (Comp));
1023 Typ : constant Entity_Id :=
1024 Etype (Defining_Identifier (Comp));
1026 if Nkind (Sindic) = N_Subtype_Indication then
1028 -- Ada 2005 (AI-216): If a component subtype is subject to
1029 -- a per-object constraint, then the component type shall
1030 -- be an Unchecked_Union.
1032 if Has_Per_Object_Constraint (Defining_Identifier (Comp))
1034 not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
1036 Error_Msg_N ("component subtype subject to per-object" &
1037 " constraint must be an Unchecked_Union", Comp);
1041 if Is_Controlled (Typ) then
1043 ("component of unchecked union cannot be controlled", Comp);
1045 elsif Has_Task (Typ) then
1047 ("component of unchecked union cannot have tasks", Comp);
1051 end Check_Component;
1053 ----------------------------------
1054 -- Check_Duplicated_Export_Name --
1055 ----------------------------------
1057 procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
1058 String_Val : constant String_Id := Strval (Nam);
1061 -- We are only interested in the export case, and in the case of
1062 -- generics, it is the instance, not the template, that is the
1063 -- problem (the template will generate a warning in any case).
1065 if not Inside_A_Generic
1066 and then (Prag_Id = Pragma_Export
1068 Prag_Id = Pragma_Export_Procedure
1070 Prag_Id = Pragma_Export_Valued_Procedure
1072 Prag_Id = Pragma_Export_Function)
1074 for J in Externals.First .. Externals.Last loop
1075 if String_Equal (String_Val, Strval (Externals.Table (J))) then
1076 Error_Msg_Sloc := Sloc (Externals.Table (J));
1077 Error_Msg_N ("external name duplicates name given#", Nam);
1082 Externals.Append (Nam);
1084 end Check_Duplicated_Export_Name;
1086 -------------------------
1087 -- Check_First_Subtype --
1088 -------------------------
1090 procedure Check_First_Subtype (Arg : Node_Id) is
1091 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1093 if not Is_First_Subtype (Entity (Argx)) then
1095 ("pragma% cannot apply to subtype", Argx);
1097 end Check_First_Subtype;
1099 ---------------------------
1100 -- Check_In_Main_Program --
1101 ---------------------------
1103 procedure Check_In_Main_Program is
1104 P : constant Node_Id := Parent (N);
1107 -- Must be at in subprogram body
1109 if Nkind (P) /= N_Subprogram_Body then
1110 Error_Pragma ("% pragma allowed only in subprogram");
1112 -- Otherwise warn if obviously not main program
1114 elsif Present (Parameter_Specifications (Specification (P)))
1115 or else not Is_Compilation_Unit (Defining_Entity (P))
1117 Error_Msg_Name_1 := Pname;
1119 ("?pragma% is only effective in main program", N);
1121 end Check_In_Main_Program;
1123 ---------------------------------------
1124 -- Check_Interrupt_Or_Attach_Handler --
1125 ---------------------------------------
1127 procedure Check_Interrupt_Or_Attach_Handler is
1128 Arg1_X : constant Node_Id := Expression (Arg1);
1129 Handler_Proc, Proc_Scope : Entity_Id;
1134 if Prag_Id = Pragma_Interrupt_Handler then
1135 Check_Restriction (No_Dynamic_Attachment, N);
1138 Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
1139 Proc_Scope := Scope (Handler_Proc);
1141 -- On AAMP only, a pragma Interrupt_Handler is supported for
1142 -- nonprotected parameterless procedures.
1144 if not AAMP_On_Target
1145 or else Prag_Id = Pragma_Attach_Handler
1147 if Ekind (Proc_Scope) /= E_Protected_Type then
1149 ("argument of pragma% must be protected procedure", Arg1);
1152 if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
1153 Error_Pragma ("pragma% must be in protected definition");
1157 if not Is_Library_Level_Entity (Proc_Scope)
1158 or else (AAMP_On_Target
1159 and then not Is_Library_Level_Entity (Handler_Proc))
1162 ("argument for pragma% must be library level entity", Arg1);
1164 end Check_Interrupt_Or_Attach_Handler;
1166 -------------------------------------------
1167 -- Check_Is_In_Decl_Part_Or_Package_Spec --
1168 -------------------------------------------
1170 procedure Check_Is_In_Decl_Part_Or_Package_Spec is
1179 elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
1182 elsif Nkind (P) = N_Package_Specification then
1185 elsif Nkind (P) = N_Block_Statement then
1188 -- Note: the following tests seem a little peculiar, because
1189 -- they test for bodies, but if we were in the statement part
1190 -- of the body, we would already have hit the handled statement
1191 -- sequence, so the only way we get here is by being in the
1192 -- declarative part of the body.
1194 elsif Nkind (P) = N_Subprogram_Body
1195 or else Nkind (P) = N_Package_Body
1196 or else Nkind (P) = N_Task_Body
1197 or else Nkind (P) = N_Entry_Body
1205 Error_Pragma ("pragma% is not in declarative part or package spec");
1206 end Check_Is_In_Decl_Part_Or_Package_Spec;
1208 -------------------------
1209 -- Check_No_Identifier --
1210 -------------------------
1212 procedure Check_No_Identifier (Arg : Node_Id) is
1214 if Chars (Arg) /= No_Name then
1215 Error_Pragma_Arg_Ident
1216 ("pragma% does not permit identifier& here", Arg);
1218 end Check_No_Identifier;
1220 --------------------------
1221 -- Check_No_Identifiers --
1222 --------------------------
1224 procedure Check_No_Identifiers is
1227 if Arg_Count > 0 then
1229 while Present (Arg_Node) loop
1230 Check_No_Identifier (Arg_Node);
1234 end Check_No_Identifiers;
1236 -------------------------------
1237 -- Check_Optional_Identifier --
1238 -------------------------------
1240 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
1242 if Present (Arg) and then Chars (Arg) /= No_Name then
1243 if Chars (Arg) /= Id then
1244 Error_Msg_Name_1 := Pname;
1245 Error_Msg_Name_2 := Id;
1246 Error_Msg_N ("pragma% argument expects identifier%", Arg);
1250 end Check_Optional_Identifier;
1252 procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
1254 Name_Buffer (1 .. Id'Length) := Id;
1255 Name_Len := Id'Length;
1256 Check_Optional_Identifier (Arg, Name_Find);
1257 end Check_Optional_Identifier;
1259 -----------------------------
1260 -- Check_Static_Constraint --
1261 -----------------------------
1263 -- Note: for convenience in writing this procedure, in addition to
1264 -- the officially (i.e. by spec) allowed argument which is always
1265 -- a constraint, it also allows ranges and discriminant associations.
1266 -- Above is not clear ???
1268 procedure Check_Static_Constraint (Constr : Node_Id) is
1270 --------------------
1271 -- Require_Static --
1272 --------------------
1274 procedure Require_Static (E : Node_Id);
1275 -- Require given expression to be static expression
1277 procedure Require_Static (E : Node_Id) is
1279 if not Is_OK_Static_Expression (E) then
1280 Flag_Non_Static_Expr
1281 ("non-static constraint not allowed in Unchecked_Union!", E);
1286 -- Start of processing for Check_Static_Constraint
1289 case Nkind (Constr) is
1290 when N_Discriminant_Association =>
1291 Require_Static (Expression (Constr));
1294 Require_Static (Low_Bound (Constr));
1295 Require_Static (High_Bound (Constr));
1297 when N_Attribute_Reference =>
1298 Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
1299 Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
1301 when N_Range_Constraint =>
1302 Check_Static_Constraint (Range_Expression (Constr));
1304 when N_Index_Or_Discriminant_Constraint =>
1308 IDC := First (Constraints (Constr));
1309 while Present (IDC) loop
1310 Check_Static_Constraint (IDC);
1318 end Check_Static_Constraint;
1320 --------------------------------------
1321 -- Check_Valid_Configuration_Pragma --
1322 --------------------------------------
1324 -- A configuration pragma must appear in the context clause of a
1325 -- compilation unit, and only other pragmas may preceed it. Note that
1326 -- the test also allows use in a configuration pragma file.
1328 procedure Check_Valid_Configuration_Pragma is
1330 if not Is_Configuration_Pragma then
1331 Error_Pragma ("incorrect placement for configuration pragma%");
1333 end Check_Valid_Configuration_Pragma;
1335 -------------------------------------
1336 -- Check_Valid_Library_Unit_Pragma --
1337 -------------------------------------
1339 procedure Check_Valid_Library_Unit_Pragma is
1341 Parent_Node : Node_Id;
1342 Unit_Name : Entity_Id;
1343 Unit_Kind : Node_Kind;
1344 Unit_Node : Node_Id;
1345 Sindex : Source_File_Index;
1348 if not Is_List_Member (N) then
1352 Plist := List_Containing (N);
1353 Parent_Node := Parent (Plist);
1355 if Parent_Node = Empty then
1358 -- Case of pragma appearing after a compilation unit. In this
1359 -- case it must have an argument with the corresponding name
1360 -- and must be part of the following pragmas of its parent.
1362 elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
1363 if Plist /= Pragmas_After (Parent_Node) then
1366 elsif Arg_Count = 0 then
1368 ("argument required if outside compilation unit");
1371 Check_No_Identifiers;
1372 Check_Arg_Count (1);
1373 Unit_Node := Unit (Parent (Parent_Node));
1374 Unit_Kind := Nkind (Unit_Node);
1376 Analyze (Expression (Arg1));
1378 if Unit_Kind = N_Generic_Subprogram_Declaration
1379 or else Unit_Kind = N_Subprogram_Declaration
1381 Unit_Name := Defining_Entity (Unit_Node);
1383 elsif Unit_Kind in N_Generic_Instantiation then
1384 Unit_Name := Defining_Entity (Unit_Node);
1387 Unit_Name := Cunit_Entity (Current_Sem_Unit);
1390 if Chars (Unit_Name) /=
1391 Chars (Entity (Expression (Arg1)))
1394 ("pragma% argument is not current unit name", Arg1);
1397 if Ekind (Unit_Name) = E_Package
1398 and then Present (Renamed_Entity (Unit_Name))
1400 Error_Pragma ("pragma% not allowed for renamed package");
1404 -- Pragma appears other than after a compilation unit
1407 -- Here we check for the generic instantiation case and also
1408 -- for the case of processing a generic formal package. We
1409 -- detect these cases by noting that the Sloc on the node
1410 -- does not belong to the current compilation unit.
1412 Sindex := Source_Index (Current_Sem_Unit);
1414 if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
1415 Rewrite (N, Make_Null_Statement (Loc));
1418 -- If before first declaration, the pragma applies to the
1419 -- enclosing unit, and the name if present must be this name.
1421 elsif Is_Before_First_Decl (N, Plist) then
1422 Unit_Node := Unit_Declaration_Node (Current_Scope);
1423 Unit_Kind := Nkind (Unit_Node);
1425 if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
1428 elsif Unit_Kind = N_Subprogram_Body
1429 and then not Acts_As_Spec (Unit_Node)
1433 elsif Nkind (Parent_Node) = N_Package_Body then
1436 elsif Nkind (Parent_Node) = N_Package_Specification
1437 and then Plist = Private_Declarations (Parent_Node)
1441 elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
1442 or else Nkind (Parent_Node) =
1443 N_Generic_Subprogram_Declaration)
1444 and then Plist = Generic_Formal_Declarations (Parent_Node)
1448 elsif Arg_Count > 0 then
1449 Analyze (Expression (Arg1));
1451 if Entity (Expression (Arg1)) /= Current_Scope then
1453 ("name in pragma% must be enclosing unit", Arg1);
1456 -- It is legal to have no argument in this context
1462 -- Error if not before first declaration. This is because a
1463 -- library unit pragma argument must be the name of a library
1464 -- unit (RM 10.1.5(7)), but the only names permitted in this
1465 -- context are (RM 10.1.5(6)) names of subprogram declarations,
1466 -- generic subprogram declarations or generic instantiations.
1470 ("pragma% misplaced, must be before first declaration");
1474 end Check_Valid_Library_Unit_Pragma;
1480 procedure Check_Variant (Variant : Node_Id) is
1481 Clist : constant Node_Id := Component_List (Variant);
1485 if not Is_Non_Empty_List (Component_Items (Clist)) then
1487 ("Unchecked_Union may not have empty component list",
1492 Comp := First (Component_Items (Clist));
1493 while Present (Comp) loop
1494 Check_Component (Comp);
1503 procedure Error_Pragma (Msg : String) is
1505 Error_Msg_Name_1 := Pname;
1506 Error_Msg_N (Msg, N);
1510 ----------------------
1511 -- Error_Pragma_Arg --
1512 ----------------------
1514 procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
1516 Error_Msg_Name_1 := Pname;
1517 Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
1519 end Error_Pragma_Arg;
1521 procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
1523 Error_Msg_Name_1 := Pname;
1524 Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
1525 Error_Pragma_Arg (Msg2, Arg);
1526 end Error_Pragma_Arg;
1528 ----------------------------
1529 -- Error_Pragma_Arg_Ident --
1530 ----------------------------
1532 procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
1534 Error_Msg_Name_1 := Pname;
1535 Error_Msg_N (Msg, Arg);
1537 end Error_Pragma_Arg_Ident;
1539 ------------------------
1540 -- Find_Lib_Unit_Name --
1541 ------------------------
1543 function Find_Lib_Unit_Name return Entity_Id is
1545 -- Return inner compilation unit entity, for case of nested
1546 -- categorization pragmas. This happens in generic unit.
1548 if Nkind (Parent (N)) = N_Package_Specification
1549 and then Defining_Entity (Parent (N)) /= Current_Scope
1551 return Defining_Entity (Parent (N));
1553 return Current_Scope;
1555 end Find_Lib_Unit_Name;
1557 ----------------------------
1558 -- Find_Program_Unit_Name --
1559 ----------------------------
1561 procedure Find_Program_Unit_Name (Id : Node_Id) is
1562 Unit_Name : Entity_Id;
1563 Unit_Kind : Node_Kind;
1564 P : constant Node_Id := Parent (N);
1567 if Nkind (P) = N_Compilation_Unit then
1568 Unit_Kind := Nkind (Unit (P));
1570 if Unit_Kind = N_Subprogram_Declaration
1571 or else Unit_Kind = N_Package_Declaration
1572 or else Unit_Kind in N_Generic_Declaration
1574 Unit_Name := Defining_Entity (Unit (P));
1576 if Chars (Id) = Chars (Unit_Name) then
1577 Set_Entity (Id, Unit_Name);
1578 Set_Etype (Id, Etype (Unit_Name));
1580 Set_Etype (Id, Any_Type);
1582 ("cannot find program unit referenced by pragma%");
1586 Set_Etype (Id, Any_Type);
1587 Error_Pragma ("pragma% inapplicable to this unit");
1593 end Find_Program_Unit_Name;
1595 -----------------------------------------
1596 -- Find_Unique_Parameterless_Procedure --
1597 -----------------------------------------
1599 function Find_Unique_Parameterless_Procedure
1601 Arg : Node_Id) return Entity_Id
1603 Proc : Entity_Id := Empty;
1606 -- The body of this procedure needs some comments ???
1608 if not Is_Entity_Name (Name) then
1610 ("argument of pragma% must be entity name", Arg);
1612 elsif not Is_Overloaded (Name) then
1613 Proc := Entity (Name);
1615 if Ekind (Proc) /= E_Procedure
1616 or else Present (First_Formal (Proc)) then
1618 ("argument of pragma% must be parameterless procedure", Arg);
1623 Found : Boolean := False;
1625 Index : Interp_Index;
1628 Get_First_Interp (Name, Index, It);
1629 while Present (It.Nam) loop
1632 if Ekind (Proc) = E_Procedure
1633 and then No (First_Formal (Proc))
1637 Set_Entity (Name, Proc);
1638 Set_Is_Overloaded (Name, False);
1641 ("ambiguous handler name for pragma% ", Arg);
1645 Get_Next_Interp (Index, It);
1650 ("argument of pragma% must be parameterless procedure",
1653 Proc := Entity (Name);
1659 end Find_Unique_Parameterless_Procedure;
1661 -------------------------
1662 -- Gather_Associations --
1663 -------------------------
1665 procedure Gather_Associations
1667 Args : out Args_List)
1672 -- Initialize all parameters to Empty
1674 for J in Args'Range loop
1678 -- That's all we have to do if there are no argument associations
1680 if No (Pragma_Argument_Associations (N)) then
1684 -- Otherwise first deal with any positional parameters present
1686 Arg := First (Pragma_Argument_Associations (N));
1687 for Index in Args'Range loop
1688 exit when No (Arg) or else Chars (Arg) /= No_Name;
1689 Args (Index) := Expression (Arg);
1693 -- Positional parameters all processed, if any left, then we
1694 -- have too many positional parameters.
1696 if Present (Arg) and then Chars (Arg) = No_Name then
1698 ("too many positional associations for pragma%", Arg);
1701 -- Process named parameters if any are present
1703 while Present (Arg) loop
1704 if Chars (Arg) = No_Name then
1706 ("positional association cannot follow named association",
1710 for Index in Names'Range loop
1711 if Names (Index) = Chars (Arg) then
1712 if Present (Args (Index)) then
1714 ("duplicate argument association for pragma%", Arg);
1716 Args (Index) := Expression (Arg);
1721 if Index = Names'Last then
1722 Error_Msg_Name_1 := Pname;
1723 Error_Msg_N ("pragma% does not allow & argument", Arg);
1725 -- Check for possible misspelling
1727 for Index1 in Names'Range loop
1728 if Is_Bad_Spelling_Of
1729 (Chars (Arg), Names (Index1))
1731 Error_Msg_Name_1 := Names (Index1);
1732 Error_Msg_N ("\possible misspelling of%", Arg);
1744 end Gather_Associations;
1746 --------------------
1747 -- Get_Pragma_Arg --
1748 --------------------
1750 function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
1752 if Nkind (Arg) = N_Pragma_Argument_Association then
1753 return Expression (Arg);
1763 procedure GNAT_Pragma is
1765 Check_Restriction (No_Implementation_Pragmas, N);
1768 --------------------------
1769 -- Is_Before_First_Decl --
1770 --------------------------
1772 function Is_Before_First_Decl
1773 (Pragma_Node : Node_Id;
1774 Decls : List_Id) return Boolean
1776 Item : Node_Id := First (Decls);
1779 -- Only other pragmas can come before this pragma
1782 if No (Item) or else Nkind (Item) /= N_Pragma then
1785 elsif Item = Pragma_Node then
1791 end Is_Before_First_Decl;
1793 -----------------------------
1794 -- Is_Configuration_Pragma --
1795 -----------------------------
1797 -- A configuration pragma must appear in the context clause of a
1798 -- compilation unit, and only other pragmas may precede it. Note that
1799 -- the test below also permits use in a configuration pragma file.
1801 function Is_Configuration_Pragma return Boolean is
1802 Lis : constant List_Id := List_Containing (N);
1803 Par : constant Node_Id := Parent (N);
1807 -- If no parent, then we are in the configuration pragma file,
1808 -- so the placement is definitely appropriate.
1813 -- Otherwise we must be in the context clause of a compilation unit
1814 -- and the only thing allowed before us in the context list is more
1815 -- configuration pragmas.
1817 elsif Nkind (Par) = N_Compilation_Unit
1818 and then Context_Items (Par) = Lis
1825 elsif Nkind (Prg) /= N_Pragma then
1835 end Is_Configuration_Pragma;
1837 --------------------------
1838 -- Is_In_Context_Clause --
1839 --------------------------
1841 function Is_In_Context_Clause return Boolean is
1843 Parent_Node : Node_Id;
1846 if not Is_List_Member (N) then
1850 Plist := List_Containing (N);
1851 Parent_Node := Parent (Plist);
1853 if Parent_Node = Empty
1854 or else Nkind (Parent_Node) /= N_Compilation_Unit
1855 or else Context_Items (Parent_Node) /= Plist
1862 end Is_In_Context_Clause;
1864 ---------------------------------
1865 -- Is_Static_String_Expression --
1866 ---------------------------------
1868 function Is_Static_String_Expression (Arg : Node_Id) return Boolean is
1869 Argx : constant Node_Id := Get_Pragma_Arg (Arg);
1872 Analyze_And_Resolve (Argx);
1873 return Is_OK_Static_Expression (Argx)
1874 and then Nkind (Argx) = N_String_Literal;
1875 end Is_Static_String_Expression;
1877 ----------------------
1878 -- Pragma_Misplaced --
1879 ----------------------
1881 procedure Pragma_Misplaced is
1883 Error_Pragma ("incorrect placement of pragma%");
1884 end Pragma_Misplaced;
1886 ------------------------------------
1887 -- Process Atomic_Shared_Volatile --
1888 ------------------------------------
1890 procedure Process_Atomic_Shared_Volatile is
1897 procedure Set_Atomic (E : Entity_Id);
1898 -- Set given type as atomic, and if no explicit alignment was
1899 -- given, set alignment to unknown, since back end knows what
1900 -- the alignment requirements are for atomic arrays. Note that
1901 -- this step is necessary for derived types.
1907 procedure Set_Atomic (E : Entity_Id) is
1911 if not Has_Alignment_Clause (E) then
1912 Set_Alignment (E, Uint_0);
1916 -- Start of processing for Process_Atomic_Shared_Volatile
1919 Check_Ada_83_Warning;
1920 Check_No_Identifiers;
1921 Check_Arg_Count (1);
1922 Check_Arg_Is_Local_Name (Arg1);
1923 E_Id := Expression (Arg1);
1925 if Etype (E_Id) = Any_Type then
1930 D := Declaration_Node (E);
1934 if Rep_Item_Too_Early (E, N)
1936 Rep_Item_Too_Late (E, N)
1940 Check_First_Subtype (Arg1);
1943 if Prag_Id /= Pragma_Volatile then
1945 Set_Atomic (Underlying_Type (E));
1946 Set_Atomic (Base_Type (E));
1949 -- Attribute belongs on the base type. If the
1950 -- view of the type is currently private, it also
1951 -- belongs on the underlying type.
1953 Set_Is_Volatile (Base_Type (E));
1954 Set_Is_Volatile (Underlying_Type (E));
1956 Set_Treat_As_Volatile (E);
1957 Set_Treat_As_Volatile (Underlying_Type (E));
1959 elsif K = N_Object_Declaration
1960 or else (K = N_Component_Declaration
1961 and then Original_Record_Component (E) = E)
1963 if Rep_Item_Too_Late (E, N) then
1967 if Prag_Id /= Pragma_Volatile then
1970 -- If the object declaration has an explicit
1971 -- initialization, a temporary may have to be
1972 -- created to hold the expression, to insure
1973 -- that access to the object remain atomic.
1975 if Nkind (Parent (E)) = N_Object_Declaration
1976 and then Present (Expression (Parent (E)))
1978 Set_Has_Delayed_Freeze (E);
1981 -- An interesting improvement here. If an object of type X
1982 -- is declared atomic, and the type X is not atomic, that's
1983 -- a pity, since it may not have appropraite alignment etc.
1984 -- We can rescue this in the special case where the object
1985 -- and type are in the same unit by just setting the type
1986 -- as atomic, so that the back end will process it as atomic.
1988 Utyp := Underlying_Type (Etype (E));
1991 and then Sloc (E) > No_Location
1992 and then Sloc (Utyp) > No_Location
1994 Get_Source_File_Index (Sloc (E)) =
1995 Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
1997 Set_Is_Atomic (Underlying_Type (Etype (E)));
2001 Set_Is_Volatile (E);
2002 Set_Treat_As_Volatile (E);
2006 ("inappropriate entity for pragma%", Arg1);
2008 end Process_Atomic_Shared_Volatile;
2010 -------------------------------------------
2011 -- Process_Compile_Time_Warning_Or_Error --
2012 -------------------------------------------
2014 procedure Process_Compile_Time_Warning_Or_Error is
2015 Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
2019 Check_Arg_Count (2);
2020 Check_No_Identifiers;
2021 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
2022 Analyze_And_Resolve (Arg1x, Standard_Boolean);
2024 if Compile_Time_Known_Value (Arg1x) then
2025 if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
2027 Str : constant String_Id :=
2028 Strval (Get_Pragma_Arg (Arg2));
2029 Len : constant Int := String_Length (Str);
2034 Cent : constant Entity_Id :=
2035 Cunit_Entity (Current_Sem_Unit);
2037 Force : constant Boolean :=
2038 Prag_Id = Pragma_Compile_Time_Warning
2040 Is_Spec_Name (Unit_Name (Current_Sem_Unit))
2041 and then (Ekind (Cent) /= E_Package
2042 or else not In_Private_Part (Cent));
2043 -- Set True if this is the warning case, and we are in the
2044 -- visible part of a package spec, or in a subprogram spec,
2045 -- in which case we want to force the client to see the
2046 -- warning, even though it is not in the main unit.
2049 -- Loop through segments of message separated by line
2050 -- feeds. We output these segments as separate messages
2051 -- with continuation marks for all but the first.
2056 Error_Msg_Strlen := 0;
2058 -- Loop to copy characters from argument to error
2059 -- message string buffer.
2062 exit when Ptr > Len;
2063 CC := Get_String_Char (Str, Ptr);
2066 -- Ignore wide chars ??? else store character
2068 if In_Character_Range (CC) then
2069 C := Get_Character (CC);
2070 exit when C = ASCII.LF;
2071 Error_Msg_Strlen := Error_Msg_Strlen + 1;
2072 Error_Msg_String (Error_Msg_Strlen) := C;
2076 -- Here with one line ready to go
2078 Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning;
2080 -- If this is a warning in a spec, then we want clients
2081 -- to see the warning, so mark the message with the
2082 -- special sequence !! to force the warning. In the case
2083 -- of a package spec, we do not force this if we are in
2084 -- the private part of the spec.
2087 if Cont = False then
2088 Error_Msg_N ("<~!!", Arg1);
2091 Error_Msg_N ("\<~!!", Arg1);
2094 -- Error, rather than warning, or in a body, so we do not
2095 -- need to force visibility for client (error will be
2096 -- output in any case, and this is the situation in which
2097 -- we do not want a client to get a warning, since the
2098 -- warning is in the body or the spec private part.
2101 if Cont = False then
2102 Error_Msg_N ("<~", Arg1);
2105 Error_Msg_N ("\<~", Arg1);
2109 exit when Ptr > Len;
2114 end Process_Compile_Time_Warning_Or_Error;
2116 ------------------------
2117 -- Process_Convention --
2118 ------------------------
2120 procedure Process_Convention
2121 (C : out Convention_Id;
2127 Comp_Unit : Unit_Number_Type;
2129 procedure Set_Convention_From_Pragma (E : Entity_Id);
2130 -- Set convention in entity E, and also flag that the entity has a
2131 -- convention pragma. If entity is for a private or incomplete type,
2132 -- also set convention and flag on underlying type. This procedure
2133 -- also deals with the special case of C_Pass_By_Copy convention.
2135 --------------------------------
2136 -- Set_Convention_From_Pragma --
2137 --------------------------------
2139 procedure Set_Convention_From_Pragma (E : Entity_Id) is
2141 -- Ada 2005 (AI-430): Check invalid attempt to change convention
2142 -- for an overridden dispatching operation. Technically this is
2143 -- an amendment and should only be done in Ada 2005 mode. However,
2144 -- this is clearly a mistake, since the problem that is addressed
2145 -- by this AI is that there is a clear gap in the RM!
2147 if Is_Dispatching_Operation (E)
2148 and then Present (Overridden_Operation (E))
2149 and then C /= Convention (Overridden_Operation (E))
2152 ("cannot change convention for " &
2153 "overridden dispatching operation",
2157 -- Set the convention
2159 Set_Convention (E, C);
2160 Set_Has_Convention_Pragma (E);
2162 if Is_Incomplete_Or_Private_Type (E) then
2163 Set_Convention (Underlying_Type (E), C);
2164 Set_Has_Convention_Pragma (Underlying_Type (E), True);
2167 -- A class-wide type should inherit the convention of
2168 -- the specific root type (although this isn't specified
2169 -- clearly by the RM).
2171 if Is_Type (E) and then Present (Class_Wide_Type (E)) then
2172 Set_Convention (Class_Wide_Type (E), C);
2175 -- If the entity is a record type, then check for special case of
2176 -- C_Pass_By_Copy, which is treated the same as C except that the
2177 -- special record flag is set. This convention is only permitted
2178 -- on record types (see AI95-00131).
2180 if Cname = Name_C_Pass_By_Copy then
2181 if Is_Record_Type (E) then
2182 Set_C_Pass_By_Copy (Base_Type (E));
2183 elsif Is_Incomplete_Or_Private_Type (E)
2184 and then Is_Record_Type (Underlying_Type (E))
2186 Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
2189 ("C_Pass_By_Copy convention allowed only for record type",
2194 -- If the entity is a derived boolean type, check for the
2195 -- special case of convention C, C++, or Fortran, where we
2196 -- consider any nonzero value to represent true.
2198 if Is_Discrete_Type (E)
2199 and then Root_Type (Etype (E)) = Standard_Boolean
2205 C = Convention_Fortran)
2207 Set_Nonzero_Is_True (Base_Type (E));
2209 end Set_Convention_From_Pragma;
2211 -- Start of processing for Process_Convention
2214 Check_At_Least_N_Arguments (2);
2215 Check_Optional_Identifier (Arg1, Name_Convention);
2216 Check_Arg_Is_Identifier (Arg1);
2217 Cname := Chars (Expression (Arg1));
2219 -- C_Pass_By_Copy is treated as a synonym for convention C
2220 -- (this is tested again below to set the critical flag)
2222 if Cname = Name_C_Pass_By_Copy then
2225 -- Otherwise we must have something in the standard convention list
2227 elsif Is_Convention_Name (Cname) then
2228 C := Get_Convention_Id (Chars (Expression (Arg1)));
2230 -- In DEC VMS, it seems that there is an undocumented feature that
2231 -- any unrecognized convention is treated as the default, which for
2232 -- us is convention C. It does not seem so terrible to do this
2233 -- unconditionally, silently in the VMS case, and with a warning
2234 -- in the non-VMS case.
2237 if Warn_On_Export_Import and not OpenVMS_On_Target then
2239 ("?unrecognized convention name, C assumed",
2246 Check_Optional_Identifier (Arg2, Name_Entity);
2247 Check_Arg_Is_Local_Name (Arg2);
2249 Id := Expression (Arg2);
2252 if not Is_Entity_Name (Id) then
2253 Error_Pragma_Arg ("entity name required", Arg2);
2258 -- Go to renamed subprogram if present, since convention applies to
2259 -- the actual renamed entity, not to the renaming entity. If the
2260 -- subprogram is inherited, go to parent subprogram.
2262 if Is_Subprogram (E)
2263 and then Present (Alias (E))
2265 if Nkind (Parent (Declaration_Node (E))) =
2266 N_Subprogram_Renaming_Declaration
2270 elsif Nkind (Parent (E)) = N_Full_Type_Declaration
2271 and then Scope (E) = Scope (Alias (E))
2277 -- Check that we are not applying this to a specless body
2279 if Is_Subprogram (E)
2280 and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
2283 ("pragma% requires separate spec and must come before body");
2286 -- Check that we are not applying this to a named constant
2288 if Ekind (E) = E_Named_Integer
2290 Ekind (E) = E_Named_Real
2292 Error_Msg_Name_1 := Pname;
2294 ("cannot apply pragma% to named constant!",
2295 Get_Pragma_Arg (Arg2));
2297 ("\supply appropriate type for&!", Arg2);
2300 if Ekind (E) = E_Enumeration_Literal then
2301 Error_Pragma ("enumeration literal not allowed for pragma%");
2304 -- Check for rep item appearing too early or too late
2306 if Etype (E) = Any_Type
2307 or else Rep_Item_Too_Early (E, N)
2311 E := Underlying_Type (E);
2314 if Rep_Item_Too_Late (E, N) then
2318 if Has_Convention_Pragma (E) then
2320 ("at most one Convention/Export/Import pragma is allowed", Arg2);
2322 elsif Convention (E) = Convention_Protected
2323 or else Ekind (Scope (E)) = E_Protected_Type
2326 ("a protected operation cannot be given a different convention",
2330 -- For Intrinsic, a subprogram is required
2332 if C = Convention_Intrinsic
2333 and then not Is_Subprogram (E)
2334 and then not Is_Generic_Subprogram (E)
2337 ("second argument of pragma% must be a subprogram", Arg2);
2340 -- For Stdcall, a subprogram, variable or subprogram type is required
2342 if C = Convention_Stdcall
2343 and then not Is_Subprogram (E)
2344 and then not Is_Generic_Subprogram (E)
2345 and then Ekind (E) /= E_Variable
2348 and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
2351 ("second argument of pragma% must be subprogram (type)",
2355 if not Is_Subprogram (E)
2356 and then not Is_Generic_Subprogram (E)
2358 Set_Convention_From_Pragma (E);
2362 Check_First_Subtype (Arg2);
2363 Set_Convention_From_Pragma (Base_Type (E));
2365 -- For subprograms, we must set the convention on the
2366 -- internally generated directly designated type as well.
2368 if Ekind (E) = E_Access_Subprogram_Type then
2369 Set_Convention_From_Pragma (Directly_Designated_Type (E));
2373 -- For the subprogram case, set proper convention for all homonyms
2374 -- in same scope and the same declarative part, i.e. the same
2375 -- compilation unit.
2378 Comp_Unit := Get_Source_Unit (E);
2379 Set_Convention_From_Pragma (E);
2381 -- Treat a pragma Import as an implicit body, for GPS use
2383 if Prag_Id = Pragma_Import then
2384 Generate_Reference (E, Id, 'b');
2390 exit when No (E1) or else Scope (E1) /= Current_Scope;
2392 if Comes_From_Source (E1)
2393 and then Comp_Unit = Get_Source_Unit (E1)
2394 and then Nkind (Original_Node (Parent (E1))) /=
2395 N_Full_Type_Declaration
2397 Set_Convention_From_Pragma (E1);
2399 if Prag_Id = Pragma_Import then
2400 Generate_Reference (E, Id, 'b');
2405 end Process_Convention;
2407 -----------------------------------------------------
2408 -- Process_Extended_Import_Export_Exception_Pragma --
2409 -----------------------------------------------------
2411 procedure Process_Extended_Import_Export_Exception_Pragma
2412 (Arg_Internal : Node_Id;
2413 Arg_External : Node_Id;
2423 if not OpenVMS_On_Target then
2425 ("?pragma% ignored (applies only to Open'V'M'S)");
2428 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2429 Def_Id := Entity (Arg_Internal);
2431 if Ekind (Def_Id) /= E_Exception then
2433 ("pragma% must refer to declared exception", Arg_Internal);
2436 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2438 if Present (Arg_Form) then
2439 Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
2442 if Present (Arg_Form)
2443 and then Chars (Arg_Form) = Name_Ada
2447 Set_Is_VMS_Exception (Def_Id);
2448 Set_Exception_Code (Def_Id, No_Uint);
2451 if Present (Arg_Code) then
2452 if not Is_VMS_Exception (Def_Id) then
2454 ("Code option for pragma% not allowed for Ada case",
2458 Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
2459 Code_Val := Expr_Value (Arg_Code);
2461 if not UI_Is_In_Int_Range (Code_Val) then
2463 ("Code option for pragma% must be in 32-bit range",
2467 Set_Exception_Code (Def_Id, Code_Val);
2470 end Process_Extended_Import_Export_Exception_Pragma;
2472 -------------------------------------------------
2473 -- Process_Extended_Import_Export_Internal_Arg --
2474 -------------------------------------------------
2476 procedure Process_Extended_Import_Export_Internal_Arg
2477 (Arg_Internal : Node_Id := Empty)
2482 if No (Arg_Internal) then
2483 Error_Pragma ("Internal parameter required for pragma%");
2486 if Nkind (Arg_Internal) = N_Identifier then
2489 elsif Nkind (Arg_Internal) = N_Operator_Symbol
2490 and then (Prag_Id = Pragma_Import_Function
2492 Prag_Id = Pragma_Export_Function)
2498 ("wrong form for Internal parameter for pragma%", Arg_Internal);
2501 Check_Arg_Is_Local_Name (Arg_Internal);
2502 end Process_Extended_Import_Export_Internal_Arg;
2504 --------------------------------------------------
2505 -- Process_Extended_Import_Export_Object_Pragma --
2506 --------------------------------------------------
2508 procedure Process_Extended_Import_Export_Object_Pragma
2509 (Arg_Internal : Node_Id;
2510 Arg_External : Node_Id;
2516 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2517 Def_Id := Entity (Arg_Internal);
2519 if Ekind (Def_Id) /= E_Constant
2520 and then Ekind (Def_Id) /= E_Variable
2523 ("pragma% must designate an object", Arg_Internal);
2526 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
2528 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
2531 ("previous Common/Psect_Object applies, pragma % not permitted",
2535 if Rep_Item_Too_Late (Def_Id, N) then
2539 Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
2541 if Present (Arg_Size) then
2542 Check_Arg_Is_External_Name (Arg_Size);
2545 -- Export_Object case
2547 if Prag_Id = Pragma_Export_Object then
2548 if not Is_Library_Level_Entity (Def_Id) then
2550 ("argument for pragma% must be library level entity",
2554 if Ekind (Current_Scope) = E_Generic_Package then
2555 Error_Pragma ("pragma& cannot appear in a generic unit");
2558 if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
2560 ("exported object must have compile time known size",
2564 if Warn_On_Export_Import and then Is_Exported (Def_Id) then
2566 ("?duplicate Export_Object pragma", N);
2568 Set_Exported (Def_Id, Arg_Internal);
2571 -- Import_Object case
2574 if Is_Concurrent_Type (Etype (Def_Id)) then
2576 ("cannot use pragma% for task/protected object",
2580 if Ekind (Def_Id) = E_Constant then
2582 ("cannot import a constant", Arg_Internal);
2585 if Warn_On_Export_Import
2586 and then Has_Discriminants (Etype (Def_Id))
2589 ("imported value must be initialized?", Arg_Internal);
2592 if Warn_On_Export_Import
2593 and then Is_Access_Type (Etype (Def_Id))
2596 ("cannot import object of an access type?", Arg_Internal);
2599 if Warn_On_Export_Import
2600 and then Is_Imported (Def_Id)
2603 ("?duplicate Import_Object pragma", N);
2605 -- Check for explicit initialization present. Note that an
2606 -- initialization that generated by the code generator, e.g.
2607 -- for an access type, does not count here.
2609 elsif Present (Expression (Parent (Def_Id)))
2612 (Original_Node (Expression (Parent (Def_Id))))
2614 Error_Msg_Sloc := Sloc (Def_Id);
2616 ("imported entities cannot be initialized (RM B.1(24))",
2617 "\no initialization allowed for & declared#", Arg1);
2619 Set_Imported (Def_Id);
2620 Note_Possible_Modification (Arg_Internal);
2623 end Process_Extended_Import_Export_Object_Pragma;
2625 ------------------------------------------------------
2626 -- Process_Extended_Import_Export_Subprogram_Pragma --
2627 ------------------------------------------------------
2629 procedure Process_Extended_Import_Export_Subprogram_Pragma
2630 (Arg_Internal : Node_Id;
2631 Arg_External : Node_Id;
2632 Arg_Parameter_Types : Node_Id;
2633 Arg_Result_Type : Node_Id := Empty;
2634 Arg_Mechanism : Node_Id;
2635 Arg_Result_Mechanism : Node_Id := Empty;
2636 Arg_First_Optional_Parameter : Node_Id := Empty)
2642 Ambiguous : Boolean;
2646 function Same_Base_Type
2648 Formal : Entity_Id) return Boolean;
2649 -- Determines if Ptype references the type of Formal. Note that
2650 -- only the base types need to match according to the spec. Ptype
2651 -- here is the argument from the pragma, which is either a type
2652 -- name, or an access attribute.
2654 --------------------
2655 -- Same_Base_Type --
2656 --------------------
2658 function Same_Base_Type
2660 Formal : Entity_Id) return Boolean
2662 Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
2666 -- Case where pragma argument is typ'Access
2668 if Nkind (Ptype) = N_Attribute_Reference
2669 and then Attribute_Name (Ptype) = Name_Access
2671 Pref := Prefix (Ptype);
2674 if not Is_Entity_Name (Pref)
2675 or else Entity (Pref) = Any_Type
2680 -- We have a match if the corresponding argument is of an
2681 -- anonymous access type, and its designicated type matches
2682 -- the type of the prefix of the access attribute
2684 return Ekind (Ftyp) = E_Anonymous_Access_Type
2685 and then Base_Type (Entity (Pref)) =
2686 Base_Type (Etype (Designated_Type (Ftyp)));
2688 -- Case where pragma argument is a type name
2693 if not Is_Entity_Name (Ptype)
2694 or else Entity (Ptype) = Any_Type
2699 -- We have a match if the corresponding argument is of
2700 -- the type given in the pragma (comparing base types)
2702 return Base_Type (Entity (Ptype)) = Ftyp;
2706 -- Start of processing for
2707 -- Process_Extended_Import_Export_Subprogram_Pragma
2710 Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
2714 -- Loop through homonyms (overloadings) of the entity
2716 Hom_Id := Entity (Arg_Internal);
2717 while Present (Hom_Id) loop
2718 Def_Id := Get_Base_Subprogram (Hom_Id);
2720 -- We need a subprogram in the current scope
2722 if not Is_Subprogram (Def_Id)
2723 or else Scope (Def_Id) /= Current_Scope
2730 -- Pragma cannot apply to subprogram body
2732 if Is_Subprogram (Def_Id)
2735 (Declaration_Node (Def_Id))) = N_Subprogram_Body
2738 ("pragma% requires separate spec"
2739 & " and must come before body");
2742 -- Test result type if given, note that the result type
2743 -- parameter can only be present for the function cases.
2745 if Present (Arg_Result_Type)
2746 and then not Same_Base_Type (Arg_Result_Type, Def_Id)
2750 elsif Etype (Def_Id) /= Standard_Void_Type
2752 (Pname = Name_Export_Procedure
2754 Pname = Name_Import_Procedure)
2758 -- Test parameter types if given. Note that this parameter
2759 -- has not been analyzed (and must not be, since it is
2760 -- semantic nonsense), so we get it as the parser left it.
2762 elsif Present (Arg_Parameter_Types) then
2763 Check_Matching_Types : declare
2768 Formal := First_Formal (Def_Id);
2770 if Nkind (Arg_Parameter_Types) = N_Null then
2771 if Present (Formal) then
2775 -- A list of one type, e.g. (List) is parsed as
2776 -- a parenthesized expression.
2778 elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
2779 and then Paren_Count (Arg_Parameter_Types) = 1
2782 or else Present (Next_Formal (Formal))
2787 Same_Base_Type (Arg_Parameter_Types, Formal);
2790 -- A list of more than one type is parsed as a aggregate
2792 elsif Nkind (Arg_Parameter_Types) = N_Aggregate
2793 and then Paren_Count (Arg_Parameter_Types) = 0
2795 Ptype := First (Expressions (Arg_Parameter_Types));
2796 while Present (Ptype) or else Present (Formal) loop
2799 or else not Same_Base_Type (Ptype, Formal)
2804 Next_Formal (Formal);
2809 -- Anything else is of the wrong form
2813 ("wrong form for Parameter_Types parameter",
2814 Arg_Parameter_Types);
2816 end Check_Matching_Types;
2819 -- Match is now False if the entry we found did not match
2820 -- either a supplied Parameter_Types or Result_Types argument
2826 -- Ambiguous case, the flag Ambiguous shows if we already
2827 -- detected this and output the initial messages.
2830 if not Ambiguous then
2832 Error_Msg_Name_1 := Pname;
2834 ("pragma% does not uniquely identify subprogram!",
2836 Error_Msg_Sloc := Sloc (Ent);
2837 Error_Msg_N ("matching subprogram #!", N);
2841 Error_Msg_Sloc := Sloc (Def_Id);
2842 Error_Msg_N ("matching subprogram #!", N);
2847 Hom_Id := Homonym (Hom_Id);
2850 -- See if we found an entry
2853 if not Ambiguous then
2854 if Is_Generic_Subprogram (Entity (Arg_Internal)) then
2856 ("pragma% cannot be given for generic subprogram");
2859 ("pragma% does not identify local subprogram");
2866 -- Import pragmas must be be for imported entities
2868 if Prag_Id = Pragma_Import_Function
2870 Prag_Id = Pragma_Import_Procedure
2872 Prag_Id = Pragma_Import_Valued_Procedure
2874 if not Is_Imported (Ent) then
2876 ("pragma Import or Interface must precede pragma%");
2879 -- Here we have the Export case which can set the entity as exported
2881 -- But does not do so if the specified external name is null, since
2882 -- that is taken as a signal in DEC Ada 83 (with which we want to be
2883 -- compatible) to request no external name.
2885 elsif Nkind (Arg_External) = N_String_Literal
2886 and then String_Length (Strval (Arg_External)) = 0
2890 -- In all other cases, set entit as exported
2893 Set_Exported (Ent, Arg_Internal);
2896 -- Special processing for Valued_Procedure cases
2898 if Prag_Id = Pragma_Import_Valued_Procedure
2900 Prag_Id = Pragma_Export_Valued_Procedure
2902 Formal := First_Formal (Ent);
2906 ("at least one parameter required for pragma%");
2908 elsif Ekind (Formal) /= E_Out_Parameter then
2910 ("first parameter must have mode out for pragma%");
2913 Set_Is_Valued_Procedure (Ent);
2917 Set_Extended_Import_Export_External_Name (Ent, Arg_External);
2919 -- Process Result_Mechanism argument if present. We have already
2920 -- checked that this is only allowed for the function case.
2922 if Present (Arg_Result_Mechanism) then
2923 Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
2926 -- Process Mechanism parameter if present. Note that this parameter
2927 -- is not analyzed, and must not be analyzed since it is semantic
2928 -- nonsense, so we get it in exactly as the parser left it.
2930 if Present (Arg_Mechanism) then
2938 -- A single mechanism association without a formal parameter
2939 -- name is parsed as a parenthesized expression. All other
2940 -- cases are parsed as aggregates, so we rewrite the single
2941 -- parameter case as an aggregate for consistency.
2943 if Nkind (Arg_Mechanism) /= N_Aggregate
2944 and then Paren_Count (Arg_Mechanism) = 1
2946 Rewrite (Arg_Mechanism,
2947 Make_Aggregate (Sloc (Arg_Mechanism),
2948 Expressions => New_List (
2949 Relocate_Node (Arg_Mechanism))));
2952 -- Case of only mechanism name given, applies to all formals
2954 if Nkind (Arg_Mechanism) /= N_Aggregate then
2955 Formal := First_Formal (Ent);
2956 while Present (Formal) loop
2957 Set_Mechanism_Value (Formal, Arg_Mechanism);
2958 Next_Formal (Formal);
2961 -- Case of list of mechanism associations given
2964 if Null_Record_Present (Arg_Mechanism) then
2966 ("inappropriate form for Mechanism parameter",
2970 -- Deal with positional ones first
2972 Formal := First_Formal (Ent);
2974 if Present (Expressions (Arg_Mechanism)) then
2975 Mname := First (Expressions (Arg_Mechanism));
2976 while Present (Mname) loop
2979 ("too many mechanism associations", Mname);
2982 Set_Mechanism_Value (Formal, Mname);
2983 Next_Formal (Formal);
2988 -- Deal with named entries
2990 if Present (Component_Associations (Arg_Mechanism)) then
2991 Massoc := First (Component_Associations (Arg_Mechanism));
2992 while Present (Massoc) loop
2993 Choice := First (Choices (Massoc));
2995 if Nkind (Choice) /= N_Identifier
2996 or else Present (Next (Choice))
2999 ("incorrect form for mechanism association",
3003 Formal := First_Formal (Ent);
3007 ("parameter name & not present", Choice);
3010 if Chars (Choice) = Chars (Formal) then
3012 (Formal, Expression (Massoc));
3016 Next_Formal (Formal);
3026 -- Process First_Optional_Parameter argument if present. We have
3027 -- already checked that this is only allowed for the Import case.
3029 if Present (Arg_First_Optional_Parameter) then
3030 if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
3032 ("first optional parameter must be formal parameter name",
3033 Arg_First_Optional_Parameter);
3036 Formal := First_Formal (Ent);
3040 ("specified formal parameter& not found",
3041 Arg_First_Optional_Parameter);
3044 exit when Chars (Formal) =
3045 Chars (Arg_First_Optional_Parameter);
3047 Next_Formal (Formal);
3050 Set_First_Optional_Parameter (Ent, Formal);
3052 -- Check specified and all remaining formals have right form
3054 while Present (Formal) loop
3055 if Ekind (Formal) /= E_In_Parameter then
3057 ("optional formal& is not of mode in!",
3058 Arg_First_Optional_Parameter, Formal);
3061 Dval := Default_Value (Formal);
3065 ("optional formal& does not have default value!",
3066 Arg_First_Optional_Parameter, Formal);
3068 elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
3073 ("default value for optional formal& is non-static!",
3074 Arg_First_Optional_Parameter, Formal);
3078 Set_Is_Optional_Parameter (Formal);
3079 Next_Formal (Formal);
3082 end Process_Extended_Import_Export_Subprogram_Pragma;
3084 --------------------------
3085 -- Process_Generic_List --
3086 --------------------------
3088 procedure Process_Generic_List is
3094 Check_No_Identifiers;
3095 Check_At_Least_N_Arguments (1);
3098 while Present (Arg) loop
3099 Exp := Expression (Arg);
3102 if not Is_Entity_Name (Exp)
3104 (not Is_Generic_Instance (Entity (Exp))
3106 not Is_Generic_Unit (Entity (Exp)))
3109 ("pragma% argument must be name of generic unit/instance",
3115 end Process_Generic_List;
3117 ---------------------------------
3118 -- Process_Import_Or_Interface --
3119 ---------------------------------
3121 procedure Process_Import_Or_Interface is
3127 Process_Convention (C, Def_Id);
3128 Kill_Size_Check_Code (Def_Id);
3129 Note_Possible_Modification (Expression (Arg2));
3131 if Ekind (Def_Id) = E_Variable
3133 Ekind (Def_Id) = E_Constant
3135 -- We do not permit Import to apply to a renaming declaration
3137 if Present (Renamed_Object (Def_Id)) then
3139 ("pragma% not allowed for object renaming", Arg2);
3141 -- User initialization is not allowed for imported object, but
3142 -- the object declaration may contain a default initialization,
3143 -- that will be discarded. Note that an explicit initialization
3144 -- only counts if it comes from source, otherwise it is simply
3145 -- the code generator making an implicit initialization explicit.
3147 elsif Present (Expression (Parent (Def_Id)))
3148 and then Comes_From_Source (Expression (Parent (Def_Id)))
3150 Error_Msg_Sloc := Sloc (Def_Id);
3152 ("no initialization allowed for declaration of& #",
3153 "\imported entities cannot be initialized (RM B.1(24))",
3157 Set_Imported (Def_Id);
3158 Process_Interface_Name (Def_Id, Arg3, Arg4);
3160 -- Note that we do not set Is_Public here. That's because we
3161 -- only want to set if if there is no address clause, and we
3162 -- don't know that yet, so we delay that processing till
3165 -- pragma Import completes deferred constants
3167 if Ekind (Def_Id) = E_Constant then
3168 Set_Has_Completion (Def_Id);
3171 -- It is not possible to import a constant of an unconstrained
3172 -- array type (e.g. string) because there is no simple way to
3173 -- write a meaningful subtype for it.
3175 if Is_Array_Type (Etype (Def_Id))
3176 and then not Is_Constrained (Etype (Def_Id))
3179 ("imported constant& must have a constrained subtype",
3184 elsif Is_Subprogram (Def_Id)
3185 or else Is_Generic_Subprogram (Def_Id)
3187 -- If the name is overloaded, pragma applies to all of the
3188 -- denoted entities in the same declarative part.
3191 while Present (Hom_Id) loop
3192 Def_Id := Get_Base_Subprogram (Hom_Id);
3194 -- Ignore inherited subprograms because the pragma will
3195 -- apply to the parent operation, which is the one called.
3197 if Is_Overloadable (Def_Id)
3198 and then Present (Alias (Def_Id))
3202 -- If it is not a subprogram, it must be in an outer
3203 -- scope and pragma does not apply.
3205 elsif not Is_Subprogram (Def_Id)
3206 and then not Is_Generic_Subprogram (Def_Id)
3210 -- Verify that the homonym is in the same declarative
3211 -- part (not just the same scope).
3213 elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
3214 and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
3219 Set_Imported (Def_Id);
3221 -- Special processing for Convention_Intrinsic
3223 if C = Convention_Intrinsic then
3225 -- Link_Name argument not allowed for intrinsic
3228 and then Chars (Arg3) = Name_Link_Name
3233 if Present (Arg4) then
3235 ("Link_Name argument not allowed for " &
3240 Set_Is_Intrinsic_Subprogram (Def_Id);
3242 -- If no external name is present, then check that
3243 -- this is a valid intrinsic subprogram. If an external
3244 -- name is present, then this is handled by the back end.
3247 Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
3251 -- All interfaced procedures need an external symbol
3252 -- created for them since they are always referenced
3253 -- from another object file.
3255 Set_Is_Public (Def_Id);
3257 -- Verify that the subprogram does not have a completion
3258 -- through a renaming declaration. For other completions
3259 -- the pragma appears as a too late representation.
3262 Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
3266 and then Nkind (Decl) = N_Subprogram_Declaration
3267 and then Present (Corresponding_Body (Decl))
3270 (Unit_Declaration_Node
3271 (Corresponding_Body (Decl))) =
3272 N_Subprogram_Renaming_Declaration
3274 Error_Msg_Sloc := Sloc (Def_Id);
3276 ("cannot import&, renaming already provided for " &
3277 "declaration #", N, Def_Id);
3281 Set_Has_Completion (Def_Id);
3282 Process_Interface_Name (Def_Id, Arg3, Arg4);
3285 if Is_Compilation_Unit (Hom_Id) then
3287 -- Its possible homonyms are not affected by the pragma.
3288 -- Such homonyms might be present in the context of other
3289 -- units being compiled.
3294 Hom_Id := Homonym (Hom_Id);
3298 -- When the convention is Java or CIL, we also allow Import to be
3299 -- given for packages, generic packages, exceptions, and record
3302 elsif (C = Convention_Java or else C = Convention_CIL)
3304 (Ekind (Def_Id) = E_Package
3305 or else Ekind (Def_Id) = E_Generic_Package
3306 or else Ekind (Def_Id) = E_Exception
3307 or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
3309 Set_Imported (Def_Id);
3310 Set_Is_Public (Def_Id);
3311 Process_Interface_Name (Def_Id, Arg3, Arg4);
3313 -- Import a CPP class
3315 elsif Is_Record_Type (Def_Id)
3316 and then C = Convention_CPP
3318 if not Is_Tagged_Type (Def_Id) then
3319 Error_Msg_Sloc := Sloc (Def_Id);
3320 Error_Pragma_Arg ("imported 'C'P'P type must be tagged", Arg2);
3323 -- Types treated as CPP classes are treated as limited, but we
3324 -- don't require them to be declared this way. A warning is
3325 -- issued to encourage the user to declare them as limited.
3326 -- This is not an error, for compatibility reasons, because
3327 -- these types have been supported this way for some time.
3329 if not Is_Limited_Type (Def_Id) then
3331 ("imported 'C'P'P type should be " &
3332 "explicitly declared limited?",
3333 Get_Pragma_Arg (Arg2));
3335 ("\type will be considered limited",
3336 Get_Pragma_Arg (Arg2));
3339 Set_Is_CPP_Class (Def_Id);
3340 Set_Is_Limited_Record (Def_Id);
3345 ("second argument of pragma% must be object or subprogram",
3349 -- If this pragma applies to a compilation unit, then the unit,
3350 -- which is a subprogram, does not require (or allow) a body.
3351 -- We also do not need to elaborate imported procedures.
3353 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
3355 Cunit : constant Node_Id := Parent (Parent (N));
3357 Set_Body_Required (Cunit, False);
3360 end Process_Import_Or_Interface;
3362 --------------------
3363 -- Process_Inline --
3364 --------------------
3366 procedure Process_Inline (Active : Boolean) is
3372 Effective : Boolean := False;
3374 procedure Make_Inline (Subp : Entity_Id);
3375 -- Subp is the defining unit name of the subprogram
3376 -- declaration. Set the flag, as well as the flag in the
3377 -- corresponding body, if there is one present.
3379 procedure Set_Inline_Flags (Subp : Entity_Id);
3380 -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp and also
3381 -- Has_Pragma_Inline_Always for the Inline_Always case.
3383 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
3384 -- Returns True if it can be determined at this stage that inlining
3385 -- is not possible, for examle if the body is available and contains
3386 -- exception handlers, we prevent inlining, since otherwise we can
3387 -- get undefined symbols at link time. This function also emits a
3388 -- warning if front-end inlining is enabled and the pragma appears
3391 -- ??? is business with link symbols still valid, or does it relate
3392 -- to front end ZCX which is being phased out ???
3394 ---------------------------
3395 -- Inlining_Not_Possible --
3396 ---------------------------
3398 function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
3399 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
3403 if Nkind (Decl) = N_Subprogram_Body then
3404 Stats := Handled_Statement_Sequence (Decl);
3405 return Present (Exception_Handlers (Stats))
3406 or else Present (At_End_Proc (Stats));
3408 elsif Nkind (Decl) = N_Subprogram_Declaration
3409 and then Present (Corresponding_Body (Decl))
3411 if Front_End_Inlining
3412 and then Analyzed (Corresponding_Body (Decl))
3414 Error_Msg_N ("pragma appears too late, ignored?", N);
3417 -- If the subprogram is a renaming as body, the body is
3418 -- just a call to the renamed subprogram, and inlining is
3419 -- trivially possible.
3422 Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) =
3423 N_Subprogram_Renaming_Declaration
3429 Handled_Statement_Sequence
3430 (Unit_Declaration_Node (Corresponding_Body (Decl)));
3433 Present (Exception_Handlers (Stats))
3434 or else Present (At_End_Proc (Stats));
3438 -- If body is not available, assume the best, the check is
3439 -- performed again when compiling enclosing package bodies.
3443 end Inlining_Not_Possible;
3449 procedure Make_Inline (Subp : Entity_Id) is
3450 Kind : constant Entity_Kind := Ekind (Subp);
3451 Inner_Subp : Entity_Id := Subp;
3454 -- Ignore if bad type, avoid cascaded error
3456 if Etype (Subp) = Any_Type then
3460 -- Ignore if all inlining is suppressed
3462 elsif Suppress_All_Inlining then
3466 -- If inlining is not possible, for now do not treat as an error
3468 elsif Inlining_Not_Possible (Subp) then
3472 -- Here we have a candidate for inlining, but we must exclude
3473 -- derived operations. Otherwise we will end up trying to
3474 -- inline a phantom declaration, and the result would be to
3475 -- drag in a body which has no direct inlining associated with
3476 -- it. That would not only be inefficient but would also result
3477 -- in the backend doing cross-unit inlining in cases where it
3478 -- was definitely inappropriate to do so.
3480 -- However, a simple Comes_From_Source test is insufficient,
3481 -- since we do want to allow inlining of generic instances,
3482 -- which also do not come from source. Predefined operators do
3483 -- not come from source but are not inlineable either.
3485 elsif not Comes_From_Source (Subp)
3486 and then not Is_Generic_Instance (Subp)
3487 and then Scope (Subp) /= Standard_Standard
3492 -- The referenced entity must either be the enclosing entity,
3493 -- or an entity declared within the current open scope.
3495 elsif Present (Scope (Subp))
3496 and then Scope (Subp) /= Current_Scope
3497 and then Subp /= Current_Scope
3500 ("argument of% must be entity in current scope", Assoc);
3504 -- Processing for procedure, operator or function.
3505 -- If subprogram is aliased (as for an instance) indicate
3506 -- that the renamed entity (if declared in the same unit)
3509 if Is_Subprogram (Subp) then
3510 while Present (Alias (Inner_Subp)) loop
3511 Inner_Subp := Alias (Inner_Subp);
3514 if In_Same_Source_Unit (Subp, Inner_Subp) then
3515 Set_Inline_Flags (Inner_Subp);
3517 Decl := Parent (Parent (Inner_Subp));
3519 if Nkind (Decl) = N_Subprogram_Declaration
3520 and then Present (Corresponding_Body (Decl))
3522 Set_Inline_Flags (Corresponding_Body (Decl));
3528 -- For a generic subprogram set flag as well, for use at
3529 -- the point of instantiation, to determine whether the
3530 -- body should be generated.
3532 elsif Is_Generic_Subprogram (Subp) then
3533 Set_Inline_Flags (Subp);
3536 -- Literals are by definition inlined
3538 elsif Kind = E_Enumeration_Literal then
3541 -- Anything else is an error
3545 ("expect subprogram name for pragma%", Assoc);
3549 ----------------------
3550 -- Set_Inline_Flags --
3551 ----------------------
3553 procedure Set_Inline_Flags (Subp : Entity_Id) is
3556 Set_Is_Inlined (Subp, True);
3559 if not Has_Pragma_Inline (Subp) then
3560 Set_Has_Pragma_Inline (Subp);
3564 if Prag_Id = Pragma_Inline_Always then
3565 Set_Has_Pragma_Inline_Always (Subp);
3567 end Set_Inline_Flags;
3569 -- Start of processing for Process_Inline
3572 Check_No_Identifiers;
3573 Check_At_Least_N_Arguments (1);
3576 Inline_Processing_Required := True;
3580 while Present (Assoc) loop
3581 Subp_Id := Expression (Assoc);
3585 if Is_Entity_Name (Subp_Id) then
3586 Subp := Entity (Subp_Id);
3588 if Subp = Any_Id then
3590 -- If previous error, avoid cascaded errors
3598 while Present (Homonym (Subp))
3599 and then Scope (Homonym (Subp)) = Current_Scope
3601 Make_Inline (Homonym (Subp));
3602 Subp := Homonym (Subp);
3609 ("inappropriate argument for pragma%", Assoc);
3612 and then Warn_On_Redundant_Constructs
3613 and then not Suppress_All_Inlining
3615 if Inlining_Not_Possible (Subp) then
3617 ("pragma Inline for& is ignored?", N, Entity (Subp_Id));
3620 ("pragma Inline for& is redundant?", N, Entity (Subp_Id));
3628 ----------------------------
3629 -- Process_Interface_Name --
3630 ----------------------------
3632 procedure Process_Interface_Name
3633 (Subprogram_Def : Entity_Id;
3639 String_Val : String_Id;
3641 procedure Check_Form_Of_Interface_Name (SN : Node_Id);
3642 -- SN is a string literal node for an interface name. This routine
3643 -- performs some minimal checks that the name is reasonable. In
3644 -- particular that no spaces or other obviously incorrect characters
3645 -- appear. This is only a warning, since any characters are allowed.
3647 ----------------------------------
3648 -- Check_Form_Of_Interface_Name --
3649 ----------------------------------
3651 procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
3652 S : constant String_Id := Strval (Expr_Value_S (SN));
3653 SL : constant Nat := String_Length (S);
3658 Error_Msg_N ("interface name cannot be null string", SN);
3661 for J in 1 .. SL loop
3662 C := Get_String_Char (S, J);
3664 if Warn_On_Export_Import
3666 (not In_Character_Range (C)
3667 or else (Get_Character (C) = ' '
3668 and then VM_Target /= CLI_Target)
3669 or else Get_Character (C) = ',')
3672 ("?interface name contains illegal character", SN);
3675 end Check_Form_Of_Interface_Name;
3677 -- Start of processing for Process_Interface_Name
3680 if No (Link_Arg) then
3681 if No (Ext_Arg) then
3682 if VM_Target = CLI_Target
3683 and then Ekind (Subprogram_Def) = E_Package
3684 and then Nkind (Parent (Subprogram_Def)) =
3685 N_Package_Specification
3686 and then Present (Generic_Parent (Parent (Subprogram_Def)))
3691 (Generic_Parent (Parent (Subprogram_Def))));
3696 elsif Chars (Ext_Arg) = Name_Link_Name then
3698 Link_Nam := Expression (Ext_Arg);
3701 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3702 Ext_Nam := Expression (Ext_Arg);
3707 Check_Optional_Identifier (Ext_Arg, Name_External_Name);
3708 Check_Optional_Identifier (Link_Arg, Name_Link_Name);
3709 Ext_Nam := Expression (Ext_Arg);
3710 Link_Nam := Expression (Link_Arg);
3713 -- Check expressions for external name and link name are static
3715 if Present (Ext_Nam) then
3716 Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
3717 Check_Form_Of_Interface_Name (Ext_Nam);
3719 -- Verify that the external name is not the name of a local
3720 -- entity, which would hide the imported one and lead to
3721 -- run-time surprises. The problem can only arise for entities
3722 -- declared in a package body (otherwise the external name is
3723 -- fully qualified and won't conflict).
3731 if Prag_Id = Pragma_Import then
3732 String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
3734 E := Entity_Id (Get_Name_Table_Info (Nam));
3736 if Nam /= Chars (Subprogram_Def)
3737 and then Present (E)
3738 and then not Is_Overloadable (E)
3739 and then Is_Immediately_Visible (E)
3740 and then not Is_Imported (E)
3741 and then Ekind (Scope (E)) = E_Package
3744 while Present (Par) loop
3745 if Nkind (Par) = N_Package_Body then
3746 Error_Msg_Sloc := Sloc (E);
3748 ("imported entity is hidden by & declared#",
3753 Par := Parent (Par);
3760 if Present (Link_Nam) then
3761 Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
3762 Check_Form_Of_Interface_Name (Link_Nam);
3765 -- If there is no link name, just set the external name
3767 if No (Link_Nam) then
3768 Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
3770 -- For the Link_Name case, the given literal is preceded by an
3771 -- asterisk, which indicates to GCC that the given name should
3772 -- be taken literally, and in particular that no prepending of
3773 -- underlines should occur, even in systems where this is the
3779 if VM_Target = No_VM then
3780 Store_String_Char (Get_Char_Code ('*'));
3783 String_Val := Strval (Expr_Value_S (Link_Nam));
3784 Store_String_Chars (String_Val);
3786 Make_String_Literal (Sloc (Link_Nam),
3787 Strval => End_String);
3790 Set_Encoded_Interface_Name
3791 (Get_Base_Subprogram (Subprogram_Def), Link_Nam);
3792 Check_Duplicated_Export_Name (Link_Nam);
3793 end Process_Interface_Name;
3795 -----------------------------------------
3796 -- Process_Interrupt_Or_Attach_Handler --
3797 -----------------------------------------
3799 procedure Process_Interrupt_Or_Attach_Handler is
3800 Arg1_X : constant Node_Id := Expression (Arg1);
3801 Handler_Proc : constant Entity_Id := Entity (Arg1_X);
3802 Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
3805 Set_Is_Interrupt_Handler (Handler_Proc);
3807 -- If the pragma is not associated with a handler procedure
3808 -- within a protected type, then it must be for a nonprotected
3809 -- procedure for the AAMP target, in which case we don't
3810 -- associate a representation item with the procedure's scope.
3812 if Ekind (Proc_Scope) = E_Protected_Type then
3813 if Prag_Id = Pragma_Interrupt_Handler
3815 Prag_Id = Pragma_Attach_Handler
3817 Record_Rep_Item (Proc_Scope, N);
3820 end Process_Interrupt_Or_Attach_Handler;
3822 --------------------------------------------------
3823 -- Process_Restrictions_Or_Restriction_Warnings --
3824 --------------------------------------------------
3826 -- Note: some of the simple identifier cases were handled in par-prag,
3827 -- but it is harmless (and more straightforward) to simply handle all
3828 -- cases here, even if it means we repeat a bit of work in some cases.
3830 procedure Process_Restrictions_Or_Restriction_Warnings
3834 R_Id : Restriction_Id;
3839 procedure Check_Unit_Name (N : Node_Id);
3840 -- Checks unit name parameter for No_Dependence. Returns if it has
3841 -- an appropriate form, otherwise raises pragma argument error.
3843 ---------------------
3844 -- Check_Unit_Name --
3845 ---------------------
3847 procedure Check_Unit_Name (N : Node_Id) is
3849 if Nkind (N) = N_Selected_Component then
3850 Check_Unit_Name (Prefix (N));
3851 Check_Unit_Name (Selector_Name (N));
3853 elsif Nkind (N) = N_Identifier then
3858 ("wrong form for unit name for No_Dependence", N);
3860 end Check_Unit_Name;
3862 -- Start of processing for Process_Restrictions_Or_Restriction_Warnings
3865 Check_Ada_83_Warning;
3866 Check_At_Least_N_Arguments (1);
3867 Check_Valid_Configuration_Pragma;
3870 while Present (Arg) loop
3872 Expr := Expression (Arg);
3874 -- Case of no restriction identifier present
3876 if Id = No_Name then
3877 if Nkind (Expr) /= N_Identifier then
3879 ("invalid form for restriction", Arg);
3884 (Process_Restriction_Synonyms (Expr));
3886 if R_Id not in All_Boolean_Restrictions then
3888 ("invalid restriction identifier", Arg);
3891 if Implementation_Restriction (R_Id) then
3893 (No_Implementation_Restrictions, Arg);
3896 -- If this is a warning, then set the warning unless we already
3897 -- have a real restriction active (we never want a warning to
3898 -- override a real restriction).
3901 if not Restriction_Active (R_Id) then
3902 Set_Restriction (R_Id, N);
3903 Restriction_Warnings (R_Id) := True;
3906 -- If real restriction case, then set it and make sure that the
3907 -- restriction warning flag is off, since a real restriction
3908 -- always overrides a warning.
3911 Set_Restriction (R_Id, N);
3912 Restriction_Warnings (R_Id) := False;
3915 -- A very special case that must be processed here: pragma
3916 -- Restrictions (No_Exceptions) turns off all run-time
3917 -- checking. This is a bit dubious in terms of the formal
3918 -- language definition, but it is what is intended by RM
3919 -- H.4(12). Restriction_Warnings never affects generated code
3920 -- so this is done only in the real restriction case.
3922 if R_Id = No_Exceptions and then not Warn then
3923 Scope_Suppress := (others => True);
3926 -- Case of No_Dependence => unit-name. Note that the parser
3927 -- already made the necessary entry in the No_Dependence table.
3929 elsif Id = Name_No_Dependence then
3930 Check_Unit_Name (Expr);
3932 -- All other cases of restriction identifier present
3935 R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
3936 Analyze_And_Resolve (Expr, Any_Integer);
3938 if R_Id not in All_Parameter_Restrictions then
3940 ("invalid restriction parameter identifier", Arg);
3942 elsif not Is_OK_Static_Expression (Expr) then
3943 Flag_Non_Static_Expr
3944 ("value must be static expression!", Expr);
3947 elsif not Is_Integer_Type (Etype (Expr))
3948 or else Expr_Value (Expr) < 0
3951 ("value must be non-negative integer", Arg);
3954 -- Restriction pragma is active
3956 Val := Expr_Value (Expr);
3958 if not UI_Is_In_Int_Range (Val) then
3960 ("pragma ignored, value too large?", Arg);
3963 -- Warning case. If the real restriction is active, then we
3964 -- ignore the request, since warning never overrides a real
3965 -- restriction. Otherwise we set the proper warning. Note that
3966 -- this circuit sets the warning again if it is already set,
3967 -- which is what we want, since the constant may have changed.
3970 if not Restriction_Active (R_Id) then
3972 (R_Id, N, Integer (UI_To_Int (Val)));
3973 Restriction_Warnings (R_Id) := True;
3976 -- Real restriction case, set restriction and make sure warning
3977 -- flag is off since real restriction always overrides warning.
3980 Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
3981 Restriction_Warnings (R_Id) := False;
3987 end Process_Restrictions_Or_Restriction_Warnings;
3989 ---------------------------------
3990 -- Process_Suppress_Unsuppress --
3991 ---------------------------------
3993 -- Note: this procedure makes entries in the check suppress data
3994 -- structures managed by Sem. See spec of package Sem for full
3995 -- details on how we handle recording of check suppression.
3997 procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
4002 In_Package_Spec : constant Boolean :=
4003 (Ekind (Current_Scope) = E_Package
4005 Ekind (Current_Scope) = E_Generic_Package)
4006 and then not In_Package_Body (Current_Scope);
4008 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
4009 -- Used to suppress a single check on the given entity
4011 --------------------------------
4012 -- Suppress_Unsuppress_Echeck --
4013 --------------------------------
4015 procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
4017 Set_Checks_May_Be_Suppressed (E);
4019 if In_Package_Spec then
4020 Push_Global_Suppress_Stack_Entry
4023 Suppress => Suppress_Case);
4026 Push_Local_Suppress_Stack_Entry
4029 Suppress => Suppress_Case);
4032 -- If this is a first subtype, and the base type is distinct,
4033 -- then also set the suppress flags on the base type.
4035 if Is_First_Subtype (E)
4036 and then Etype (E) /= E
4038 Suppress_Unsuppress_Echeck (Etype (E), C);
4040 end Suppress_Unsuppress_Echeck;
4042 -- Start of processing for Process_Suppress_Unsuppress
4045 -- Suppress/Unsuppress can appear as a configuration pragma,
4046 -- or in a declarative part or a package spec (RM 11.5(5))
4048 if not Is_Configuration_Pragma then
4049 Check_Is_In_Decl_Part_Or_Package_Spec;
4052 Check_At_Least_N_Arguments (1);
4053 Check_At_Most_N_Arguments (2);
4054 Check_No_Identifier (Arg1);
4055 Check_Arg_Is_Identifier (Arg1);
4057 C := Get_Check_Id (Chars (Expression (Arg1)));
4059 if C = No_Check_Id then
4061 ("argument of pragma% is not valid check name", Arg1);
4064 if not Suppress_Case
4065 and then (C = All_Checks or else C = Overflow_Check)
4067 Opt.Overflow_Checks_Unsuppressed := True;
4070 if Arg_Count = 1 then
4072 -- Make an entry in the local scope suppress table. This is the
4073 -- table that directly shows the current value of the scope
4074 -- suppress check for any check id value.
4076 if C = All_Checks then
4078 -- For All_Checks, we set all specific predefined checks with
4079 -- the exception of Elaboration_Check, which is handled
4080 -- specially because of not wanting All_Checks to have the
4081 -- effect of deactivating static elaboration order processing.
4083 for J in Scope_Suppress'Range loop
4084 if J /= Elaboration_Check then
4085 Scope_Suppress (J) := Suppress_Case;
4089 -- If not All_Checks, and predefined check, then set appropriate
4090 -- scope entry. Note that we will set Elaboration_Check if this
4091 -- is explicitly specified.
4093 elsif C in Predefined_Check_Id then
4094 Scope_Suppress (C) := Suppress_Case;
4097 -- Also make an entry in the Local_Entity_Suppress table
4099 Push_Local_Suppress_Stack_Entry
4102 Suppress => Suppress_Case);
4104 -- Case of two arguments present, where the check is suppressed for
4105 -- a specified entity (given as the second argument of the pragma)
4108 Check_Optional_Identifier (Arg2, Name_On);
4109 E_Id := Expression (Arg2);
4112 if not Is_Entity_Name (E_Id) then
4114 ("second argument of pragma% must be entity name", Arg2);
4123 -- Enforce RM 11.5(7) which requires that for a pragma that
4124 -- appears within a package spec, the named entity must be
4125 -- within the package spec. We allow the package name itself
4126 -- to be mentioned since that makes sense, although it is not
4127 -- strictly allowed by 11.5(7).
4130 and then E /= Current_Scope
4131 and then Scope (E) /= Current_Scope
4134 ("entity in pragma% is not in package spec (RM 11.5(7))",
4138 -- Loop through homonyms. As noted below, in the case of a package
4139 -- spec, only homonyms within the package spec are considered.
4142 Suppress_Unsuppress_Echeck (E, C);
4144 if Is_Generic_Instance (E)
4145 and then Is_Subprogram (E)
4146 and then Present (Alias (E))
4148 Suppress_Unsuppress_Echeck (Alias (E), C);
4151 -- Move to next homonym
4156 -- If we are within a package specification, the
4157 -- pragma only applies to homonyms in the same scope.
4159 exit when In_Package_Spec
4160 and then Scope (E) /= Current_Scope;
4163 end Process_Suppress_Unsuppress;
4169 procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
4171 if Is_Imported (E) then
4173 ("cannot export entity& that was previously imported", Arg);
4175 elsif Present (Address_Clause (E)) then
4177 ("cannot export entity& that has an address clause", Arg);
4180 Set_Is_Exported (E);
4182 -- Generate a reference for entity explicitly, because the
4183 -- identifier may be overloaded and name resolution will not
4186 Generate_Reference (E, Arg);
4188 -- Deal with exporting non-library level entity
4190 if not Is_Library_Level_Entity (E) then
4192 -- Not allowed at all for subprograms
4194 if Is_Subprogram (E) then
4195 Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
4197 -- Otherwise set public and statically allocated
4201 Set_Is_Statically_Allocated (E);
4203 -- Warn if the corresponding W flag is set and the pragma
4204 -- comes from source. The latter may not be true e.g. on
4205 -- VMS where we expand export pragmas for exception codes
4206 -- associated with imported or exported exceptions. We do
4207 -- not want to generate a warning for something that the
4208 -- user did not write.
4210 if Warn_On_Export_Import
4211 and then Comes_From_Source (Arg)
4214 ("?& has been made static as a result of Export", Arg, E);
4216 ("\this usage is non-standard and non-portable", Arg);
4221 if Warn_On_Export_Import and then Is_Type (E) then
4223 ("exporting a type has no effect?", Arg, E);
4226 if Warn_On_Export_Import and Inside_A_Generic then
4228 ("all instances of& will have the same external name?", Arg, E);
4232 ----------------------------------------------
4233 -- Set_Extended_Import_Export_External_Name --
4234 ----------------------------------------------
4236 procedure Set_Extended_Import_Export_External_Name
4237 (Internal_Ent : Entity_Id;
4238 Arg_External : Node_Id)
4240 Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
4244 if No (Arg_External) then
4248 Check_Arg_Is_External_Name (Arg_External);
4250 if Nkind (Arg_External) = N_String_Literal then
4251 if String_Length (Strval (Arg_External)) = 0 then
4254 New_Name := Adjust_External_Name_Case (Arg_External);
4257 elsif Nkind (Arg_External) = N_Identifier then
4258 New_Name := Get_Default_External_Name (Arg_External);
4260 -- Check_Arg_Is_External_Name should let through only
4261 -- identifiers and string literals or static string
4262 -- expressions (which are folded to string literals).
4265 raise Program_Error;
4268 -- If we already have an external name set (by a prior normal
4269 -- Import or Export pragma), then the external names must match
4271 if Present (Interface_Name (Internal_Ent)) then
4272 Check_Matching_Internal_Names : declare
4273 S1 : constant String_Id := Strval (Old_Name);
4274 S2 : constant String_Id := Strval (New_Name);
4277 -- Called if names do not match
4283 procedure Mismatch is
4285 Error_Msg_Sloc := Sloc (Old_Name);
4287 ("external name does not match that given #",
4291 -- Start of processing for Check_Matching_Internal_Names
4294 if String_Length (S1) /= String_Length (S2) then
4298 for J in 1 .. String_Length (S1) loop
4299 if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
4304 end Check_Matching_Internal_Names;
4306 -- Otherwise set the given name
4309 Set_Encoded_Interface_Name (Internal_Ent, New_Name);
4310 Check_Duplicated_Export_Name (New_Name);
4312 end Set_Extended_Import_Export_External_Name;
4318 procedure Set_Imported (E : Entity_Id) is
4320 -- Error message if already imported or exported
4322 if Is_Exported (E) or else Is_Imported (E) then
4323 if Is_Exported (E) then
4324 Error_Msg_NE ("entity& was previously exported", N, E);
4326 Error_Msg_NE ("entity& was previously imported", N, E);
4329 Error_Msg_Name_1 := Pname;
4331 ("\(pragma% applies to all previous entities)", N);
4333 Error_Msg_Sloc := Sloc (E);
4334 Error_Msg_NE ("\import not allowed for& declared#", N, E);
4336 -- Here if not previously imported or exported, OK to import
4339 Set_Is_Imported (E);
4341 -- If the entity is an object that is not at the library
4342 -- level, then it is statically allocated. We do not worry
4343 -- about objects with address clauses in this context since
4344 -- they are not really imported in the linker sense.
4347 and then not Is_Library_Level_Entity (E)
4348 and then No (Address_Clause (E))
4350 Set_Is_Statically_Allocated (E);
4355 -------------------------
4356 -- Set_Mechanism_Value --
4357 -------------------------
4359 -- Note: the mechanism name has not been analyzed (and cannot indeed
4360 -- be analyzed, since it is semantic nonsense), so we get it in the
4361 -- exact form created by the parser.
4363 procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
4367 procedure Bad_Class;
4368 -- Signal bad descriptor class name
4370 procedure Bad_Mechanism;
4371 -- Signal bad mechanism name
4377 procedure Bad_Class is
4379 Error_Pragma_Arg ("unrecognized descriptor class name", Class);
4382 -------------------------
4383 -- Bad_Mechanism_Value --
4384 -------------------------
4386 procedure Bad_Mechanism is
4388 Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
4391 -- Start of processing for Set_Mechanism_Value
4394 if Mechanism (Ent) /= Default_Mechanism then
4396 ("mechanism for & has already been set", Mech_Name, Ent);
4399 -- MECHANISM_NAME ::= value | reference | descriptor
4401 if Nkind (Mech_Name) = N_Identifier then
4402 if Chars (Mech_Name) = Name_Value then
4403 Set_Mechanism (Ent, By_Copy);
4406 elsif Chars (Mech_Name) = Name_Reference then
4407 Set_Mechanism (Ent, By_Reference);
4410 elsif Chars (Mech_Name) = Name_Descriptor then
4411 Check_VMS (Mech_Name);
4412 Set_Mechanism (Ent, By_Descriptor);
4415 elsif Chars (Mech_Name) = Name_Copy then
4417 ("bad mechanism name, Value assumed", Mech_Name);
4423 -- MECHANISM_NAME ::= descriptor (CLASS_NAME)
4424 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4426 -- Note: this form is parsed as an indexed component
4428 elsif Nkind (Mech_Name) = N_Indexed_Component then
4429 Class := First (Expressions (Mech_Name));
4431 if Nkind (Prefix (Mech_Name)) /= N_Identifier
4432 or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
4433 or else Present (Next (Class))
4438 -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
4439 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
4441 -- Note: this form is parsed as a function call
4443 elsif Nkind (Mech_Name) = N_Function_Call then
4445 Param := First (Parameter_Associations (Mech_Name));
4447 if Nkind (Name (Mech_Name)) /= N_Identifier
4448 or else Chars (Name (Mech_Name)) /= Name_Descriptor
4449 or else Present (Next (Param))
4450 or else No (Selector_Name (Param))
4451 or else Chars (Selector_Name (Param)) /= Name_Class
4455 Class := Explicit_Actual_Parameter (Param);
4462 -- Fall through here with Class set to descriptor class name
4464 Check_VMS (Mech_Name);
4466 if Nkind (Class) /= N_Identifier then
4469 elsif Chars (Class) = Name_UBS then
4470 Set_Mechanism (Ent, By_Descriptor_UBS);
4472 elsif Chars (Class) = Name_UBSB then
4473 Set_Mechanism (Ent, By_Descriptor_UBSB);
4475 elsif Chars (Class) = Name_UBA then
4476 Set_Mechanism (Ent, By_Descriptor_UBA);
4478 elsif Chars (Class) = Name_S then
4479 Set_Mechanism (Ent, By_Descriptor_S);
4481 elsif Chars (Class) = Name_SB then
4482 Set_Mechanism (Ent, By_Descriptor_SB);
4484 elsif Chars (Class) = Name_A then
4485 Set_Mechanism (Ent, By_Descriptor_A);
4487 elsif Chars (Class) = Name_NCA then
4488 Set_Mechanism (Ent, By_Descriptor_NCA);
4493 end Set_Mechanism_Value;
4495 ---------------------------
4496 -- Set_Ravenscar_Profile --
4497 ---------------------------
4499 -- The tasks to be done here are
4501 -- Set required policies
4503 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4504 -- pragma Locking_Policy (Ceiling_Locking)
4506 -- Set Detect_Blocking mode
4508 -- Set required restrictions (see System.Rident for detailed list)
4510 procedure Set_Ravenscar_Profile (N : Node_Id) is
4512 -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
4514 if Task_Dispatching_Policy /= ' '
4515 and then Task_Dispatching_Policy /= 'F'
4517 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
4518 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4520 -- Set the FIFO_Within_Priorities policy, but always preserve
4521 -- System_Location since we like the error message with the run time
4525 Task_Dispatching_Policy := 'F';
4527 if Task_Dispatching_Policy_Sloc /= System_Location then
4528 Task_Dispatching_Policy_Sloc := Loc;
4532 -- pragma Locking_Policy (Ceiling_Locking)
4534 if Locking_Policy /= ' '
4535 and then Locking_Policy /= 'C'
4537 Error_Msg_Sloc := Locking_Policy_Sloc;
4538 Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
4540 -- Set the Ceiling_Locking policy, but preserve System_Location since
4541 -- we like the error message with the run time name.
4544 Locking_Policy := 'C';
4546 if Locking_Policy_Sloc /= System_Location then
4547 Locking_Policy_Sloc := Loc;
4551 -- pragma Detect_Blocking
4553 Detect_Blocking := True;
4555 -- Set the corresponding restrictions
4557 Set_Profile_Restrictions (Ravenscar, N, Warn => False);
4558 end Set_Ravenscar_Profile;
4560 -- Start of processing for Analyze_Pragma
4563 -- Deal with unrecognized pragma
4565 if not Is_Pragma_Name (Pname) then
4566 if Warn_On_Unrecognized_Pragma then
4567 Error_Msg_Name_1 := Pname;
4568 Error_Msg_N ("?unrecognized pragma%!", Pragma_Identifier (N));
4570 for PN in First_Pragma_Name .. Last_Pragma_Name loop
4571 if Is_Bad_Spelling_Of (Pname, PN) then
4572 Error_Msg_Name_1 := PN;
4574 ("\?possible misspelling of %!", Pragma_Identifier (N));
4583 -- Here to start processing for recognized pragma
4585 Prag_Id := Get_Pragma_Id (Pname);
4594 if Present (Pragma_Argument_Associations (N)) then
4595 Arg1 := First (Pragma_Argument_Associations (N));
4597 if Present (Arg1) then
4598 Arg2 := Next (Arg1);
4600 if Present (Arg2) then
4601 Arg3 := Next (Arg2);
4603 if Present (Arg3) then
4604 Arg4 := Next (Arg3);
4610 -- Count number of arguments
4617 while Present (Arg_Node) loop
4618 Arg_Count := Arg_Count + 1;
4623 -- An enumeration type defines the pragmas that are supported by the
4624 -- implementation. Get_Pragma_Id (in package Prag) transorms a name
4625 -- into the corresponding enumeration value for the following case.
4633 -- pragma Abort_Defer;
4635 when Pragma_Abort_Defer =>
4637 Check_Arg_Count (0);
4639 -- The only required semantic processing is to check the
4640 -- placement. This pragma must appear at the start of the
4641 -- statement sequence of a handled sequence of statements.
4643 if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
4644 or else N /= First (Statements (Parent (N)))
4655 -- Note: this pragma also has some specific processing in Par.Prag
4656 -- because we want to set the Ada version mode during parsing.
4658 when Pragma_Ada_83 =>
4660 Check_Arg_Count (0);
4662 -- We really should check unconditionally for proper configuration
4663 -- pragma placement, since we really don't want mixed Ada modes
4664 -- within a single unit, and the GNAT reference manual has always
4665 -- said this was a configuration pragma, but we did not check and
4666 -- are hesitant to add the check now.
4668 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
4669 -- or Ada 95, so we must check if we are in Ada 2005 mode.
4671 if Ada_Version >= Ada_05 then
4672 Check_Valid_Configuration_Pragma;
4675 -- Now set Ada 83 mode
4677 Ada_Version := Ada_83;
4678 Ada_Version_Explicit := Ada_Version;
4686 -- Note: this pragma also has some specific processing in Par.Prag
4687 -- because we want to set the Ada 83 version mode during parsing.
4689 when Pragma_Ada_95 =>
4691 Check_Arg_Count (0);
4693 -- We really should check unconditionally for proper configuration
4694 -- pragma placement, since we really don't want mixed Ada modes
4695 -- within a single unit, and the GNAT reference manual has always
4696 -- said this was a configuration pragma, but we did not check and
4697 -- are hesitant to add the check now.
4699 -- However, we really cannot tolerate mixing Ada 2005 with Ada 83
4700 -- or Ada 95, so we must check if we are in Ada 2005 mode.
4702 if Ada_Version >= Ada_05 then
4703 Check_Valid_Configuration_Pragma;
4706 -- Now set Ada 95 mode
4708 Ada_Version := Ada_95;
4709 Ada_Version_Explicit := Ada_Version;
4711 ---------------------
4712 -- Ada_05/Ada_2005 --
4713 ---------------------
4716 -- pragma Ada_05 (LOCAL_NAME);
4719 -- pragma Ada_2005 (LOCAL_NAME):
4721 -- Note: these pragma also have some specific processing in Par.Prag
4722 -- because we want to set the Ada 2005 version mode during parsing.
4724 when Pragma_Ada_05 | Pragma_Ada_2005 => declare
4730 if Arg_Count = 1 then
4731 Check_Arg_Is_Local_Name (Arg1);
4732 E_Id := Expression (Arg1);
4734 if Etype (E_Id) = Any_Type then
4738 Set_Is_Ada_2005_Only (Entity (E_Id));
4741 Check_Arg_Count (0);
4743 -- For Ada_2005 we unconditionally enforce the documented
4744 -- configuration pragma placement, since we do not want to
4745 -- tolerate mixed modes in a unit involving Ada 2005. That
4746 -- would cause real difficulties for those cases where there
4747 -- are incompatibilities between Ada 95 and Ada 2005.
4749 Check_Valid_Configuration_Pragma;
4751 -- Now set Ada 2005 mode
4753 Ada_Version := Ada_05;
4754 Ada_Version_Explicit := Ada_05;
4758 ----------------------
4759 -- All_Calls_Remote --
4760 ----------------------
4762 -- pragma All_Calls_Remote [(library_package_NAME)];
4764 when Pragma_All_Calls_Remote => All_Calls_Remote : declare
4765 Lib_Entity : Entity_Id;
4768 Check_Ada_83_Warning;
4769 Check_Valid_Library_Unit_Pragma;
4771 if Nkind (N) = N_Null_Statement then
4775 Lib_Entity := Find_Lib_Unit_Name;
4777 -- This pragma should only apply to a RCI unit (RM E.2.3(23))
4779 if Present (Lib_Entity)
4780 and then not Debug_Flag_U
4782 if not Is_Remote_Call_Interface (Lib_Entity) then
4783 Error_Pragma ("pragma% only apply to rci unit");
4785 -- Set flag for entity of the library unit
4788 Set_Has_All_Calls_Remote (Lib_Entity);
4792 end All_Calls_Remote;
4798 -- pragma Annotate (IDENTIFIER {, ARG});
4799 -- ARG ::= NAME | EXPRESSION
4801 when Pragma_Annotate => Annotate : begin
4803 Check_At_Least_N_Arguments (1);
4804 Check_Arg_Is_Identifier (Arg1);
4812 while Present (Arg) loop
4813 Exp := Expression (Arg);
4816 if Is_Entity_Name (Exp) then
4819 elsif Nkind (Exp) = N_String_Literal then
4820 Resolve (Exp, Standard_String);
4822 elsif Is_Overloaded (Exp) then
4823 Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
4838 -- pragma Assert ([Check =>] Boolean_EXPRESSION
4839 -- [, [Message =>] Static_String_EXPRESSION]);
4841 when Pragma_Assert => Assert : declare
4847 Check_At_Least_N_Arguments (1);
4848 Check_At_Most_N_Arguments (2);
4849 Check_Arg_Order ((Name_Check, Name_Message));
4850 Check_Optional_Identifier (Arg1, Name_Check);
4852 if Arg_Count > 1 then
4853 Check_Optional_Identifier (Arg2, Name_Message);
4854 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
4857 -- If expansion is active and assertions are inactive, then
4858 -- we rewrite the Assertion as:
4860 -- if False and then condition then
4864 -- The reason we do this rewriting during semantic analysis rather
4865 -- than as part of normal expansion is that we cannot analyze and
4866 -- expand the code for the boolean expression directly, or it may
4867 -- cause insertion of actions that would escape the attempt to
4868 -- suppress the assertion code.
4870 -- Note that the Sloc for the if statement corresponds to the
4871 -- argument condition, not the pragma itself. The reason for this
4872 -- is that we may generate a warning if the condition is False at
4873 -- compile time, and we do not want to delete this warning when we
4874 -- delete the if statement.
4876 Expr := Expression (Arg1);
4877 Eloc := Sloc (Expr);
4879 if Expander_Active and not Assertions_Enabled then
4881 Make_If_Statement (Eloc,
4883 Make_And_Then (Eloc,
4884 Left_Opnd => New_Occurrence_Of (Standard_False, Eloc),
4885 Right_Opnd => Expr),
4886 Then_Statements => New_List (
4887 Make_Null_Statement (Eloc))));
4891 -- Otherwise (if assertions are enabled, or if we are not
4892 -- operating with expansion active), then we just analyze
4893 -- and resolve the expression.
4896 Analyze_And_Resolve (Expr, Any_Boolean);
4899 -- If assertion is of the form (X'First = literal), where X is
4900 -- formal parameter, then set Low_Bound_Known flag on this formal.
4902 if Nkind (Expr) = N_Op_Eq then
4904 Right : constant Node_Id := Right_Opnd (Expr);
4905 Left : constant Node_Id := Left_Opnd (Expr);
4907 if Nkind (Left) = N_Attribute_Reference
4908 and then Attribute_Name (Left) = Name_First
4909 and then Is_Entity_Name (Prefix (Left))
4910 and then Is_Formal (Entity (Prefix (Left)))
4911 and then Nkind (Right) = N_Integer_Literal
4913 Set_Low_Bound_Known (Entity (Prefix (Left)));
4919 ----------------------
4920 -- Assertion_Policy --
4921 ----------------------
4923 -- pragma Assertion_Policy (Check | Ignore)
4925 when Pragma_Assertion_Policy =>
4927 Check_Arg_Count (1);
4928 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
4929 Assertions_Enabled := Chars (Expression (Arg1)) = Name_Check;
4935 -- pragma AST_Entry (entry_IDENTIFIER);
4937 when Pragma_AST_Entry => AST_Entry : declare
4943 Check_Arg_Count (1);
4944 Check_No_Identifiers;
4945 Check_Arg_Is_Local_Name (Arg1);
4946 Ent := Entity (Expression (Arg1));
4948 -- Note: the implementation of the AST_Entry pragma could handle
4949 -- the entry family case fine, but for now we are consistent with
4950 -- the DEC rules, and do not allow the pragma, which of course
4951 -- has the effect of also forbidding the attribute.
4953 if Ekind (Ent) /= E_Entry then
4955 ("pragma% argument must be simple entry name", Arg1);
4957 elsif Is_AST_Entry (Ent) then
4959 ("duplicate % pragma for entry", Arg1);
4961 elsif Has_Homonym (Ent) then
4963 ("pragma% argument cannot specify overloaded entry", Arg1);
4967 FF : constant Entity_Id := First_Formal (Ent);
4970 if Present (FF) then
4971 if Present (Next_Formal (FF)) then
4973 ("entry for pragma% can have only one argument",
4976 elsif Parameter_Mode (FF) /= E_In_Parameter then
4978 ("entry parameter for pragma% must have mode IN",
4984 Set_Is_AST_Entry (Ent);
4992 -- pragma Asynchronous (LOCAL_NAME);
4994 when Pragma_Asynchronous => Asynchronous : declare
5002 procedure Process_Async_Pragma;
5003 -- Common processing for procedure and access-to-procedure case
5005 --------------------------
5006 -- Process_Async_Pragma --
5007 --------------------------
5009 procedure Process_Async_Pragma is
5012 Set_Is_Asynchronous (Nm);
5016 -- The formals should be of mode IN (RM E.4.1(6))
5019 while Present (S) loop
5020 Formal := Defining_Identifier (S);
5022 if Nkind (Formal) = N_Defining_Identifier
5023 and then Ekind (Formal) /= E_In_Parameter
5026 ("pragma% procedure can only have IN parameter",
5033 Set_Is_Asynchronous (Nm);
5034 end Process_Async_Pragma;
5036 -- Start of processing for pragma Asynchronous
5039 Check_Ada_83_Warning;
5040 Check_No_Identifiers;
5041 Check_Arg_Count (1);
5042 Check_Arg_Is_Local_Name (Arg1);
5044 if Debug_Flag_U then
5048 C_Ent := Cunit_Entity (Current_Sem_Unit);
5049 Analyze (Expression (Arg1));
5050 Nm := Entity (Expression (Arg1));
5052 if not Is_Remote_Call_Interface (C_Ent)
5053 and then not Is_Remote_Types (C_Ent)
5055 -- This pragma should only appear in an RCI or Remote Types
5056 -- unit (RM E.4.1(4))
5059 ("pragma% not in Remote_Call_Interface or " &
5060 "Remote_Types unit");
5063 if Ekind (Nm) = E_Procedure
5064 and then Nkind (Parent (Nm)) = N_Procedure_Specification
5066 if not Is_Remote_Call_Interface (Nm) then
5068 ("pragma% cannot be applied on non-remote procedure",
5072 L := Parameter_Specifications (Parent (Nm));
5073 Process_Async_Pragma;
5076 elsif Ekind (Nm) = E_Function then
5078 ("pragma% cannot be applied to function", Arg1);
5080 elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
5082 if Is_Record_Type (Nm) then
5083 -- A record type that is the Equivalent_Type for
5084 -- a remote access-to-subprogram type.
5086 N := Declaration_Node (Corresponding_Remote_Type (Nm));
5089 -- A non-expanded RAS type (case where distribution is
5092 N := Declaration_Node (Nm);
5095 if Nkind (N) = N_Full_Type_Declaration
5096 and then Nkind (Type_Definition (N)) =
5097 N_Access_Procedure_Definition
5099 L := Parameter_Specifications (Type_Definition (N));
5100 Process_Async_Pragma;
5102 if Is_Asynchronous (Nm)
5103 and then Expander_Active
5104 and then Get_PCS_Name /= Name_No_DSA
5106 RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
5111 ("pragma% cannot reference access-to-function type",
5115 -- Only other possibility is Access-to-class-wide type
5117 elsif Is_Access_Type (Nm)
5118 and then Is_Class_Wide_Type (Designated_Type (Nm))
5120 Check_First_Subtype (Arg1);
5121 Set_Is_Asynchronous (Nm);
5122 if Expander_Active then
5123 RACW_Type_Is_Asynchronous (Nm);
5127 Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
5135 -- pragma Atomic (LOCAL_NAME);
5137 when Pragma_Atomic =>
5138 Process_Atomic_Shared_Volatile;
5140 -----------------------
5141 -- Atomic_Components --
5142 -----------------------
5144 -- pragma Atomic_Components (array_LOCAL_NAME);
5146 -- This processing is shared by Volatile_Components
5148 when Pragma_Atomic_Components |
5149 Pragma_Volatile_Components =>
5151 Atomic_Components : declare
5158 Check_Ada_83_Warning;
5159 Check_No_Identifiers;
5160 Check_Arg_Count (1);
5161 Check_Arg_Is_Local_Name (Arg1);
5162 E_Id := Expression (Arg1);
5164 if Etype (E_Id) = Any_Type then
5170 if Rep_Item_Too_Early (E, N)
5172 Rep_Item_Too_Late (E, N)
5177 D := Declaration_Node (E);
5180 if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
5182 ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
5183 and then Nkind (D) = N_Object_Declaration
5184 and then Nkind (Object_Definition (D)) =
5185 N_Constrained_Array_Definition)
5187 -- The flag is set on the object, or on the base type
5189 if Nkind (D) /= N_Object_Declaration then
5193 Set_Has_Volatile_Components (E);
5195 if Prag_Id = Pragma_Atomic_Components then
5196 Set_Has_Atomic_Components (E);
5198 if Is_Packed (E) then
5199 Set_Is_Packed (E, False);
5202 ("?Pack canceled, cannot pack atomic components",
5208 Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
5210 end Atomic_Components;
5212 --------------------
5213 -- Attach_Handler --
5214 --------------------
5216 -- pragma Attach_Handler (handler_NAME, EXPRESSION);
5218 when Pragma_Attach_Handler =>
5219 Check_Ada_83_Warning;
5220 Check_No_Identifiers;
5221 Check_Arg_Count (2);
5223 if No_Run_Time_Mode then
5224 Error_Msg_CRT ("Attach_Handler pragma", N);
5226 Check_Interrupt_Or_Attach_Handler;
5228 -- The expression that designates the attribute may
5229 -- depend on a discriminant, and is therefore a per-
5230 -- object expression, to be expanded in the init proc.
5231 -- If expansion is enabled, perform semantic checks
5234 if Expander_Active then
5236 Temp : constant Node_Id :=
5237 New_Copy_Tree (Expression (Arg2));
5239 Set_Parent (Temp, N);
5240 Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
5244 Analyze (Expression (Arg2));
5245 Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
5248 Process_Interrupt_Or_Attach_Handler;
5251 --------------------
5252 -- C_Pass_By_Copy --
5253 --------------------
5255 -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
5257 when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
5263 Check_Valid_Configuration_Pragma;
5264 Check_Arg_Count (1);
5265 Check_Optional_Identifier (Arg1, "max_size");
5267 Arg := Expression (Arg1);
5268 Check_Arg_Is_Static_Expression (Arg, Any_Integer);
5270 Val := Expr_Value (Arg);
5274 ("maximum size for pragma% must be positive", Arg1);
5276 elsif UI_Is_In_Int_Range (Val) then
5277 Default_C_Record_Mechanism := UI_To_Int (Val);
5279 -- If a giant value is given, Int'Last will do well enough.
5280 -- If sometime someone complains that a record larger than
5281 -- two gigabytes is not copied, we will worry about it then!
5284 Default_C_Record_Mechanism := Mechanism_Type'Last;
5292 -- pragma Check_Name (check_IDENTIFIER);
5294 when Pragma_Check_Name =>
5295 Check_No_Identifiers;
5297 Check_Valid_Configuration_Pragma;
5298 Check_Arg_Count (1);
5299 Check_Arg_Is_Identifier (Arg1);
5302 Nam : constant Name_Id := Chars (Expression (Arg1));
5305 for J in Check_Names.First .. Check_Names.Last loop
5306 if Check_Names.Table (J) = Nam then
5311 Check_Names.Append (Nam);
5314 ---------------------
5315 -- CIL_Constructor --
5316 ---------------------
5318 -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME);
5320 -- Processing for this pragma is shared with Java_Constructor
5326 -- pragma Comment (static_string_EXPRESSION)
5328 -- Processing for pragma Comment shares the circuitry for
5329 -- pragma Ident. The only differences are that Ident enforces
5330 -- a limit of 31 characters on its argument, and also enforces
5331 -- limitations on placement for DEC compatibility. Pragma
5332 -- Comment shares neither of these restrictions.
5338 -- pragma Common_Object (
5339 -- [Internal =>] LOCAL_NAME
5340 -- [, [External =>] EXTERNAL_SYMBOL]
5341 -- [, [Size =>] EXTERNAL_SYMBOL]);
5343 -- Processing for this pragma is shared with Psect_Object
5345 ------------------------
5346 -- Compile_Time_Error --
5347 ------------------------
5349 -- pragma Compile_Time_Error
5350 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5352 when Pragma_Compile_Time_Error =>
5353 Process_Compile_Time_Warning_Or_Error;
5355 --------------------------
5356 -- Compile_Time_Warning --
5357 --------------------------
5359 -- pragma Compile_Time_Warning
5360 -- (boolean_EXPRESSION, static_string_EXPRESSION);
5362 when Pragma_Compile_Time_Warning =>
5363 Process_Compile_Time_Warning_Or_Error;
5369 when Pragma_Compiler_Unit =>
5371 Check_Arg_Count (0);
5372 Set_Is_Compiler_Unit (Get_Source_Unit (N));
5374 -----------------------------
5375 -- Complete_Representation --
5376 -----------------------------
5378 -- pragma Complete_Representation;
5380 when Pragma_Complete_Representation =>
5382 Check_Arg_Count (0);
5384 if Nkind (Parent (N)) /= N_Record_Representation_Clause then
5386 ("pragma & must appear within record representation clause");
5389 ----------------------------
5390 -- Complex_Representation --
5391 ----------------------------
5393 -- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
5395 when Pragma_Complex_Representation => Complex_Representation : declare
5402 Check_Arg_Count (1);
5403 Check_Optional_Identifier (Arg1, Name_Entity);
5404 Check_Arg_Is_Local_Name (Arg1);
5405 E_Id := Expression (Arg1);
5407 if Etype (E_Id) = Any_Type then
5413 if not Is_Record_Type (E) then
5415 ("argument for pragma% must be record type", Arg1);
5418 Ent := First_Entity (E);
5421 or else No (Next_Entity (Ent))
5422 or else Present (Next_Entity (Next_Entity (Ent)))
5423 or else not Is_Floating_Point_Type (Etype (Ent))
5424 or else Etype (Ent) /= Etype (Next_Entity (Ent))
5427 ("record for pragma% must have two fields of the same "
5428 & "floating-point type", Arg1);
5431 Set_Has_Complex_Representation (Base_Type (E));
5433 -- We need to treat the type has having a non-standard
5434 -- representation, for back-end purposes, even though in
5435 -- general a complex will have the default representation
5436 -- of a record with two real components.
5438 Set_Has_Non_Standard_Rep (Base_Type (E));
5440 end Complex_Representation;
5442 -------------------------
5443 -- Component_Alignment --
5444 -------------------------
5446 -- pragma Component_Alignment (
5447 -- [Form =>] ALIGNMENT_CHOICE
5448 -- [, [Name =>] type_LOCAL_NAME]);
5450 -- ALIGNMENT_CHOICE ::=
5452 -- | Component_Size_4
5456 when Pragma_Component_Alignment => Component_AlignmentP : declare
5457 Args : Args_List (1 .. 2);
5458 Names : constant Name_List (1 .. 2) := (
5462 Form : Node_Id renames Args (1);
5463 Name : Node_Id renames Args (2);
5465 Atype : Component_Alignment_Kind;
5470 Gather_Associations (Names, Args);
5473 Error_Pragma ("missing Form argument for pragma%");
5476 Check_Arg_Is_Identifier (Form);
5478 -- Get proper alignment, note that Default = Component_Size
5479 -- on all machines we have so far, and we want to set this
5480 -- value rather than the default value to indicate that it
5481 -- has been explicitly set (and thus will not get overridden
5482 -- by the default component alignment for the current scope)
5484 if Chars (Form) = Name_Component_Size then
5485 Atype := Calign_Component_Size;
5487 elsif Chars (Form) = Name_Component_Size_4 then
5488 Atype := Calign_Component_Size_4;
5490 elsif Chars (Form) = Name_Default then
5491 Atype := Calign_Component_Size;
5493 elsif Chars (Form) = Name_Storage_Unit then
5494 Atype := Calign_Storage_Unit;
5498 ("invalid Form parameter for pragma%", Form);
5501 -- Case with no name, supplied, affects scope table entry
5505 (Scope_Stack.Last).Component_Alignment_Default := Atype;
5507 -- Case of name supplied
5510 Check_Arg_Is_Local_Name (Name);
5512 Typ := Entity (Name);
5515 or else Rep_Item_Too_Early (Typ, N)
5519 Typ := Underlying_Type (Typ);
5522 if not Is_Record_Type (Typ)
5523 and then not Is_Array_Type (Typ)
5526 ("Name parameter of pragma% must identify record or " &
5527 "array type", Name);
5530 -- An explicit Component_Alignment pragma overrides an
5531 -- implicit pragma Pack, but not an explicit one.
5533 if not Has_Pragma_Pack (Base_Type (Typ)) then
5534 Set_Is_Packed (Base_Type (Typ), False);
5535 Set_Component_Alignment (Base_Type (Typ), Atype);
5538 end Component_AlignmentP;
5544 -- pragma Controlled (first_subtype_LOCAL_NAME);
5546 when Pragma_Controlled => Controlled : declare
5550 Check_No_Identifiers;
5551 Check_Arg_Count (1);
5552 Check_Arg_Is_Local_Name (Arg1);
5553 Arg := Expression (Arg1);
5555 if not Is_Entity_Name (Arg)
5556 or else not Is_Access_Type (Entity (Arg))
5558 Error_Pragma_Arg ("pragma% requires access type", Arg1);
5560 Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
5568 -- pragma Convention ([Convention =>] convention_IDENTIFIER,
5569 -- [Entity =>] LOCAL_NAME);
5571 when Pragma_Convention => Convention : declare
5574 pragma Warnings (Off, C);
5575 pragma Warnings (Off, E);
5577 Check_Arg_Order ((Name_Convention, Name_Entity));
5578 Check_Ada_83_Warning;
5579 Check_Arg_Count (2);
5580 Process_Convention (C, E);
5583 ---------------------------
5584 -- Convention_Identifier --
5585 ---------------------------
5587 -- pragma Convention_Identifier ([Name =>] IDENTIFIER,
5588 -- [Convention =>] convention_IDENTIFIER);
5590 when Pragma_Convention_Identifier => Convention_Identifier : declare
5596 Check_Arg_Order ((Name_Name, Name_Convention));
5597 Check_Arg_Count (2);
5598 Check_Optional_Identifier (Arg1, Name_Name);
5599 Check_Optional_Identifier (Arg2, Name_Convention);
5600 Check_Arg_Is_Identifier (Arg1);
5601 Check_Arg_Is_Identifier (Arg2);
5602 Idnam := Chars (Expression (Arg1));
5603 Cname := Chars (Expression (Arg2));
5605 if Is_Convention_Name (Cname) then
5606 Record_Convention_Identifier
5607 (Idnam, Get_Convention_Id (Cname));
5610 ("second arg for % pragma must be convention", Arg2);
5612 end Convention_Identifier;
5618 -- pragma CPP_Class ([Entity =>] local_NAME)
5620 when Pragma_CPP_Class => CPP_Class : declare
5625 if Warn_On_Obsolescent_Feature then
5627 ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" &
5628 " by pragma import?", N);
5632 Check_Arg_Count (1);
5633 Check_Optional_Identifier (Arg1, Name_Entity);
5634 Check_Arg_Is_Local_Name (Arg1);
5636 Arg := Expression (Arg1);
5639 if Etype (Arg) = Any_Type then
5643 if not Is_Entity_Name (Arg)
5644 or else not Is_Type (Entity (Arg))
5646 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
5649 Typ := Entity (Arg);
5651 if not Is_Tagged_Type (Typ) then
5652 Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1);
5655 -- Types treated as CPP classes are treated as limited, but we
5656 -- don't require them to be declared this way. A warning is issued
5657 -- to encourage the user to declare them as limited. This is not
5658 -- an error, for compatibility reasons, because these types have
5659 -- been supported this way for some time.
5661 if not Is_Limited_Type (Typ) then
5663 ("imported 'C'P'P type should be " &
5664 "explicitly declared limited?",
5665 Get_Pragma_Arg (Arg1));
5667 ("\type will be considered limited",
5668 Get_Pragma_Arg (Arg1));
5671 Set_Is_CPP_Class (Typ);
5672 Set_Is_Limited_Record (Typ);
5673 Set_Convention (Typ, Convention_CPP);
5676 ---------------------
5677 -- CPP_Constructor --
5678 ---------------------
5680 -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME
5681 -- [, [External_Name =>] static_string_EXPRESSION ]
5682 -- [, [Link_Name =>] static_string_EXPRESSION ]);
5684 when Pragma_CPP_Constructor => CPP_Constructor : declare
5690 Check_At_Least_N_Arguments (1);
5691 Check_At_Most_N_Arguments (3);
5692 Check_Optional_Identifier (Arg1, Name_Entity);
5693 Check_Arg_Is_Local_Name (Arg1);
5695 Id := Expression (Arg1);
5696 Find_Program_Unit_Name (Id);
5698 -- If we did not find the name, we are done
5700 if Etype (Id) = Any_Type then
5704 Def_Id := Entity (Id);
5706 if Ekind (Def_Id) = E_Function
5707 and then Is_Class_Wide_Type (Etype (Def_Id))
5708 and then Is_CPP_Class (Etype (Etype (Def_Id)))
5710 if Arg_Count >= 2 then
5711 Set_Imported (Def_Id);
5712 Set_Is_Public (Def_Id);
5713 Process_Interface_Name (Def_Id, Arg2, Arg3);
5716 if No (Parameter_Specifications (Parent (Def_Id))) then
5717 Set_Has_Completion (Def_Id);
5718 Set_Is_Constructor (Def_Id);
5721 ("non-default constructors not implemented", Arg1);
5726 ("pragma% requires function returning a 'C'P'P_Class type",
5729 end CPP_Constructor;
5735 when Pragma_CPP_Virtual => CPP_Virtual : declare
5737 if Warn_On_Obsolescent_Feature then
5739 ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " &
5748 when Pragma_CPP_Vtable => CPP_Vtable : declare
5750 if Warn_On_Obsolescent_Feature then
5752 ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " &
5761 -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
5763 when Pragma_Debug => Debug : declare
5771 (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
5774 if Arg_Count = 2 then
5777 Left_Opnd => Relocate_Node (Cond),
5778 Right_Opnd => Expression (Arg1));
5781 -- Rewrite into a conditional with an appropriate condition. We
5782 -- wrap the procedure call in a block so that overhead from e.g.
5783 -- use of the secondary stack does not generate execution overhead
5784 -- for suppressed conditions.
5786 Rewrite (N, Make_Implicit_If_Statement (N,
5788 Then_Statements => New_List (
5789 Make_Block_Statement (Loc,
5790 Handled_Statement_Sequence =>
5791 Make_Handled_Sequence_Of_Statements (Loc,
5792 Statements => New_List (
5793 Relocate_Node (Debug_Statement (N))))))));
5801 -- pragma Debug_Policy (Check | Ignore)
5803 when Pragma_Debug_Policy =>
5805 Check_Arg_Count (1);
5806 Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
5807 Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
5809 ---------------------
5810 -- Detect_Blocking --
5811 ---------------------
5813 -- pragma Detect_Blocking;
5815 when Pragma_Detect_Blocking =>
5817 Check_Arg_Count (0);
5818 Check_Valid_Configuration_Pragma;
5819 Detect_Blocking := True;
5825 -- pragma Discard_Names [([On =>] LOCAL_NAME)];
5827 when Pragma_Discard_Names => Discard_Names : declare
5832 Check_Ada_83_Warning;
5834 -- Deal with configuration pragma case
5836 if Arg_Count = 0 and then Is_Configuration_Pragma then
5837 Global_Discard_Names := True;
5840 -- Otherwise, check correct appropriate context
5843 Check_Is_In_Decl_Part_Or_Package_Spec;
5845 if Arg_Count = 0 then
5847 -- If there is no parameter, then from now on this pragma
5848 -- applies to any enumeration, exception or tagged type
5849 -- defined in the current declarative part, and recursively
5850 -- to any nested scope.
5852 Set_Discard_Names (Current_Scope);
5856 Check_Arg_Count (1);
5857 Check_Optional_Identifier (Arg1, Name_On);
5858 Check_Arg_Is_Local_Name (Arg1);
5859 E_Id := Expression (Arg1);
5861 if Etype (E_Id) = Any_Type then
5867 if (Is_First_Subtype (E)
5868 and then (Is_Enumeration_Type (E)
5869 or else Is_Tagged_Type (E)))
5870 or else Ekind (E) = E_Exception
5872 Set_Discard_Names (E);
5875 ("inappropriate entity for pragma%", Arg1);
5885 -- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
5887 when Pragma_Elaborate => Elaborate : declare
5892 -- Pragma must be in context items list of a compilation unit
5894 if not Is_In_Context_Clause then
5898 -- Must be at least one argument
5900 if Arg_Count = 0 then
5901 Error_Pragma ("pragma% requires at least one argument");
5904 -- In Ada 83 mode, there can be no items following it in the
5905 -- context list except other pragmas and implicit with clauses
5906 -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
5907 -- placement rule does not apply.
5909 if Ada_Version = Ada_83 and then Comes_From_Source (N) then
5911 while Present (Citem) loop
5912 if Nkind (Citem) = N_Pragma
5913 or else (Nkind (Citem) = N_With_Clause
5914 and then Implicit_With (Citem))
5919 ("(Ada 83) pragma% must be at end of context clause");
5926 -- Finally, the arguments must all be units mentioned in a with
5927 -- clause in the same context clause. Note we already checked (in
5928 -- Par.Prag) that the arguments are all identifiers or selected
5932 Outer : while Present (Arg) loop
5933 Citem := First (List_Containing (N));
5934 Inner : while Citem /= N loop
5935 if Nkind (Citem) = N_With_Clause
5936 and then Same_Name (Name (Citem), Expression (Arg))
5938 Set_Elaborate_Present (Citem, True);
5939 Set_Unit_Name (Expression (Arg), Name (Citem));
5941 -- With the pragma present, elaboration calls on
5942 -- subprograms from the named unit need no further
5943 -- checks, as long as the pragma appears in the current
5944 -- compilation unit. If the pragma appears in some unit
5945 -- in the context, there might still be a need for an
5946 -- Elaborate_All_Desirable from the current compilation
5947 -- to the the named unit, so we keep the check enabled.
5949 if In_Extended_Main_Source_Unit (N) then
5950 Set_Suppress_Elaboration_Warnings
5951 (Entity (Name (Citem)));
5962 ("argument of pragma% is not with'ed unit", Arg);
5968 -- Give a warning if operating in static mode with -gnatwl
5969 -- (elaboration warnings eanbled) switch set.
5971 if Elab_Warnings and not Dynamic_Elaboration_Checks then
5973 ("?use of pragma Elaborate may not be safe", N);
5975 ("?use pragma Elaborate_All instead if possible", N);
5983 -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
5985 when Pragma_Elaborate_All => Elaborate_All : declare
5990 Check_Ada_83_Warning;
5992 -- Pragma must be in context items list of a compilation unit
5994 if not Is_In_Context_Clause then
5998 -- Must be at least one argument
6000 if Arg_Count = 0 then
6001 Error_Pragma ("pragma% requires at least one argument");
6004 -- Note: unlike pragma Elaborate, pragma Elaborate_All does not
6005 -- have to appear at the end of the context clause, but may
6006 -- appear mixed in with other items, even in Ada 83 mode.
6008 -- Final check: the arguments must all be units mentioned in
6009 -- a with clause in the same context clause. Note that we
6010 -- already checked (in Par.Prag) that all the arguments are
6011 -- either identifiers or selected components.
6014 Outr : while Present (Arg) loop
6015 Citem := First (List_Containing (N));
6016 Innr : while Citem /= N loop
6017 if Nkind (Citem) = N_With_Clause
6018 and then Same_Name (Name (Citem), Expression (Arg))
6020 Set_Elaborate_All_Present (Citem, True);
6021 Set_Unit_Name (Expression (Arg), Name (Citem));
6023 -- Suppress warnings and elaboration checks on the named
6024 -- unit if the pragma is in the current compilation, as
6025 -- for pragma Elaborate.
6027 if In_Extended_Main_Source_Unit (N) then
6028 Set_Suppress_Elaboration_Warnings
6029 (Entity (Name (Citem)));
6038 Set_Error_Posted (N);
6040 ("argument of pragma% is not with'ed unit", Arg);
6047 --------------------
6048 -- Elaborate_Body --
6049 --------------------
6051 -- pragma Elaborate_Body [( library_unit_NAME )];
6053 when Pragma_Elaborate_Body => Elaborate_Body : declare
6054 Cunit_Node : Node_Id;
6055 Cunit_Ent : Entity_Id;
6058 Check_Ada_83_Warning;
6059 Check_Valid_Library_Unit_Pragma;
6061 if Nkind (N) = N_Null_Statement then
6065 Cunit_Node := Cunit (Current_Sem_Unit);
6066 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
6068 if Nkind (Unit (Cunit_Node)) = N_Package_Body
6070 Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
6072 Error_Pragma ("pragma% must refer to a spec, not a body");
6074 Set_Body_Required (Cunit_Node, True);
6075 Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
6077 -- If we are in dynamic elaboration mode, then we suppress
6078 -- elaboration warnings for the unit, since it is definitely
6079 -- fine NOT to do dynamic checks at the first level (and such
6080 -- checks will be suppressed because no elaboration boolean
6081 -- is created for Elaborate_Body packages).
6083 -- But in the static model of elaboration, Elaborate_Body is
6084 -- definitely NOT good enough to ensure elaboration safety on
6085 -- its own, since the body may WITH other units that are not
6086 -- safe from an elaboration point of view, so a client must
6087 -- still do an Elaborate_All on such units.
6089 -- Debug flag -gnatdD restores the old behavior of 3.13,
6090 -- where Elaborate_Body always suppressed elab warnings.
6092 if Dynamic_Elaboration_Checks or Debug_Flag_DD then
6093 Set_Suppress_Elaboration_Warnings (Cunit_Ent);
6098 ------------------------
6099 -- Elaboration_Checks --
6100 ------------------------
6102 -- pragma Elaboration_Checks (Static | Dynamic);
6104 when Pragma_Elaboration_Checks =>
6106 Check_Arg_Count (1);
6107 Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
6108 Dynamic_Elaboration_Checks :=
6109 (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
6115 -- pragma Eliminate (
6116 -- [Unit_Name =>] IDENTIFIER |
6117 -- SELECTED_COMPONENT
6118 -- [,[Entity =>] IDENTIFIER |
6119 -- SELECTED_COMPONENT |
6121 -- [,]OVERLOADING_RESOLUTION);
6123 -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
6126 -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
6129 -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
6131 -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
6132 -- Result_Type => result_SUBTYPE_NAME]
6134 -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
6135 -- SUBTYPE_NAME ::= STRING_LITERAL
6137 -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
6138 -- SOURCE_TRACE ::= STRING_LITERAL
6140 when Pragma_Eliminate => Eliminate : declare
6141 Args : Args_List (1 .. 5);
6142 Names : constant Name_List (1 .. 5) := (
6145 Name_Parameter_Types,
6147 Name_Source_Location);
6149 Unit_Name : Node_Id renames Args (1);
6150 Entity : Node_Id renames Args (2);
6151 Parameter_Types : Node_Id renames Args (3);
6152 Result_Type : Node_Id renames Args (4);
6153 Source_Location : Node_Id renames Args (5);
6157 Check_Valid_Configuration_Pragma;
6158 Gather_Associations (Names, Args);
6160 if No (Unit_Name) then
6161 Error_Pragma ("missing Unit_Name argument for pragma%");
6165 and then (Present (Parameter_Types)
6167 Present (Result_Type)
6169 Present (Source_Location))
6171 Error_Pragma ("missing Entity argument for pragma%");
6174 if (Present (Parameter_Types)
6176 Present (Result_Type))
6178 Present (Source_Location)
6181 ("parameter profile and source location cannot " &
6182 "be used together in pragma%");
6185 Process_Eliminate_Pragma
6199 -- [ Convention =>] convention_IDENTIFIER,
6200 -- [ Entity =>] local_NAME
6201 -- [, [External_Name =>] static_string_EXPRESSION ]
6202 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6204 when Pragma_Export => Export : declare
6208 pragma Warnings (Off, C);
6211 Check_Ada_83_Warning;
6217 Check_At_Least_N_Arguments (2);
6218 Check_At_Most_N_Arguments (4);
6219 Process_Convention (C, Def_Id);
6221 if Ekind (Def_Id) /= E_Constant then
6222 Note_Possible_Modification (Expression (Arg2));
6225 Process_Interface_Name (Def_Id, Arg3, Arg4);
6226 Set_Exported (Def_Id, Arg2);
6229 ----------------------
6230 -- Export_Exception --
6231 ----------------------
6233 -- pragma Export_Exception (
6234 -- [Internal =>] LOCAL_NAME
6235 -- [, [External =>] EXTERNAL_SYMBOL]
6236 -- [, [Form =>] Ada | VMS]
6237 -- [, [Code =>] static_integer_EXPRESSION]);
6239 when Pragma_Export_Exception => Export_Exception : declare
6240 Args : Args_List (1 .. 4);
6241 Names : constant Name_List (1 .. 4) := (
6247 Internal : Node_Id renames Args (1);
6248 External : Node_Id renames Args (2);
6249 Form : Node_Id renames Args (3);
6250 Code : Node_Id renames Args (4);
6253 if Inside_A_Generic then
6254 Error_Pragma ("pragma% cannot be used for generic entities");
6257 Gather_Associations (Names, Args);
6258 Process_Extended_Import_Export_Exception_Pragma (
6259 Arg_Internal => Internal,
6260 Arg_External => External,
6264 if not Is_VMS_Exception (Entity (Internal)) then
6265 Set_Exported (Entity (Internal), Internal);
6267 end Export_Exception;
6269 ---------------------
6270 -- Export_Function --
6271 ---------------------
6273 -- pragma Export_Function (
6274 -- [Internal =>] LOCAL_NAME
6275 -- [, [External =>] EXTERNAL_SYMBOL]
6276 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6277 -- [, [Result_Type =>] TYPE_DESIGNATOR]
6278 -- [, [Mechanism =>] MECHANISM]
6279 -- [, [Result_Mechanism =>] MECHANISM_NAME]);
6281 -- EXTERNAL_SYMBOL ::=
6283 -- | static_string_EXPRESSION
6285 -- PARAMETER_TYPES ::=
6287 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6289 -- TYPE_DESIGNATOR ::=
6291 -- | subtype_Name ' Access
6295 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6297 -- MECHANISM_ASSOCIATION ::=
6298 -- [formal_parameter_NAME =>] MECHANISM_NAME
6300 -- MECHANISM_NAME ::=
6303 -- | Descriptor [([Class =>] CLASS_NAME)]
6305 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6307 when Pragma_Export_Function => Export_Function : declare
6308 Args : Args_List (1 .. 6);
6309 Names : constant Name_List (1 .. 6) := (
6312 Name_Parameter_Types,
6315 Name_Result_Mechanism);
6317 Internal : Node_Id renames Args (1);
6318 External : Node_Id renames Args (2);
6319 Parameter_Types : Node_Id renames Args (3);
6320 Result_Type : Node_Id renames Args (4);
6321 Mechanism : Node_Id renames Args (5);
6322 Result_Mechanism : Node_Id renames Args (6);
6326 Gather_Associations (Names, Args);
6327 Process_Extended_Import_Export_Subprogram_Pragma (
6328 Arg_Internal => Internal,
6329 Arg_External => External,
6330 Arg_Parameter_Types => Parameter_Types,
6331 Arg_Result_Type => Result_Type,
6332 Arg_Mechanism => Mechanism,
6333 Arg_Result_Mechanism => Result_Mechanism);
6334 end Export_Function;
6340 -- pragma Export_Object (
6341 -- [Internal =>] LOCAL_NAME
6342 -- [, [External =>] EXTERNAL_SYMBOL]
6343 -- [, [Size =>] EXTERNAL_SYMBOL]);
6345 -- EXTERNAL_SYMBOL ::=
6347 -- | static_string_EXPRESSION
6349 -- PARAMETER_TYPES ::=
6351 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6353 -- TYPE_DESIGNATOR ::=
6355 -- | subtype_Name ' Access
6359 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6361 -- MECHANISM_ASSOCIATION ::=
6362 -- [formal_parameter_NAME =>] MECHANISM_NAME
6364 -- MECHANISM_NAME ::=
6367 -- | Descriptor [([Class =>] CLASS_NAME)]
6369 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6371 when Pragma_Export_Object => Export_Object : declare
6372 Args : Args_List (1 .. 3);
6373 Names : constant Name_List (1 .. 3) := (
6378 Internal : Node_Id renames Args (1);
6379 External : Node_Id renames Args (2);
6380 Size : Node_Id renames Args (3);
6384 Gather_Associations (Names, Args);
6385 Process_Extended_Import_Export_Object_Pragma (
6386 Arg_Internal => Internal,
6387 Arg_External => External,
6391 ----------------------
6392 -- Export_Procedure --
6393 ----------------------
6395 -- pragma Export_Procedure (
6396 -- [Internal =>] LOCAL_NAME
6397 -- [, [External =>] EXTERNAL_SYMBOL]
6398 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6399 -- [, [Mechanism =>] MECHANISM]);
6401 -- EXTERNAL_SYMBOL ::=
6403 -- | static_string_EXPRESSION
6405 -- PARAMETER_TYPES ::=
6407 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6409 -- TYPE_DESIGNATOR ::=
6411 -- | subtype_Name ' Access
6415 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6417 -- MECHANISM_ASSOCIATION ::=
6418 -- [formal_parameter_NAME =>] MECHANISM_NAME
6420 -- MECHANISM_NAME ::=
6423 -- | Descriptor [([Class =>] CLASS_NAME)]
6425 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6427 when Pragma_Export_Procedure => Export_Procedure : declare
6428 Args : Args_List (1 .. 4);
6429 Names : constant Name_List (1 .. 4) := (
6432 Name_Parameter_Types,
6435 Internal : Node_Id renames Args (1);
6436 External : Node_Id renames Args (2);
6437 Parameter_Types : Node_Id renames Args (3);
6438 Mechanism : Node_Id renames Args (4);
6442 Gather_Associations (Names, Args);
6443 Process_Extended_Import_Export_Subprogram_Pragma (
6444 Arg_Internal => Internal,
6445 Arg_External => External,
6446 Arg_Parameter_Types => Parameter_Types,
6447 Arg_Mechanism => Mechanism);
6448 end Export_Procedure;
6454 -- pragma Export_Value (
6455 -- [Value =>] static_integer_EXPRESSION,
6456 -- [Link_Name =>] static_string_EXPRESSION);
6458 when Pragma_Export_Value =>
6460 Check_Arg_Order ((Name_Value, Name_Link_Name));
6461 Check_Arg_Count (2);
6463 Check_Optional_Identifier (Arg1, Name_Value);
6464 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
6466 Check_Optional_Identifier (Arg2, Name_Link_Name);
6467 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
6469 -----------------------------
6470 -- Export_Valued_Procedure --
6471 -----------------------------
6473 -- pragma Export_Valued_Procedure (
6474 -- [Internal =>] LOCAL_NAME
6475 -- [, [External =>] EXTERNAL_SYMBOL,]
6476 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
6477 -- [, [Mechanism =>] MECHANISM]);
6479 -- EXTERNAL_SYMBOL ::=
6481 -- | static_string_EXPRESSION
6483 -- PARAMETER_TYPES ::=
6485 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
6487 -- TYPE_DESIGNATOR ::=
6489 -- | subtype_Name ' Access
6493 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
6495 -- MECHANISM_ASSOCIATION ::=
6496 -- [formal_parameter_NAME =>] MECHANISM_NAME
6498 -- MECHANISM_NAME ::=
6501 -- | Descriptor [([Class =>] CLASS_NAME)]
6503 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
6505 when Pragma_Export_Valued_Procedure =>
6506 Export_Valued_Procedure : declare
6507 Args : Args_List (1 .. 4);
6508 Names : constant Name_List (1 .. 4) := (
6511 Name_Parameter_Types,
6514 Internal : Node_Id renames Args (1);
6515 External : Node_Id renames Args (2);
6516 Parameter_Types : Node_Id renames Args (3);
6517 Mechanism : Node_Id renames Args (4);
6521 Gather_Associations (Names, Args);
6522 Process_Extended_Import_Export_Subprogram_Pragma (
6523 Arg_Internal => Internal,
6524 Arg_External => External,
6525 Arg_Parameter_Types => Parameter_Types,
6526 Arg_Mechanism => Mechanism);
6527 end Export_Valued_Procedure;
6533 -- pragma Extend_System ([Name =>] Identifier);
6535 when Pragma_Extend_System => Extend_System : declare
6538 Check_Valid_Configuration_Pragma;
6539 Check_Arg_Count (1);
6540 Check_Optional_Identifier (Arg1, Name_Name);
6541 Check_Arg_Is_Identifier (Arg1);
6543 Get_Name_String (Chars (Expression (Arg1)));
6546 and then Name_Buffer (1 .. 4) = "aux_"
6548 if Present (System_Extend_Pragma_Arg) then
6549 if Chars (Expression (Arg1)) =
6550 Chars (Expression (System_Extend_Pragma_Arg))
6554 Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
6555 Error_Pragma ("pragma% conflicts with that #");
6559 System_Extend_Pragma_Arg := Arg1;
6561 if not GNAT_Mode then
6562 System_Extend_Unit := Arg1;
6566 Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
6570 ------------------------
6571 -- Extensions_Allowed --
6572 ------------------------
6574 -- pragma Extensions_Allowed (ON | OFF);
6576 when Pragma_Extensions_Allowed =>
6578 Check_Arg_Count (1);
6579 Check_No_Identifiers;
6580 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
6582 if Chars (Expression (Arg1)) = Name_On then
6583 Extensions_Allowed := True;
6585 Extensions_Allowed := False;
6592 -- pragma External (
6593 -- [ Convention =>] convention_IDENTIFIER,
6594 -- [ Entity =>] local_NAME
6595 -- [, [External_Name =>] static_string_EXPRESSION ]
6596 -- [, [Link_Name =>] static_string_EXPRESSION ]);
6598 when Pragma_External => External : declare
6602 pragma Warnings (Off, C);
6611 Check_At_Least_N_Arguments (2);
6612 Check_At_Most_N_Arguments (4);
6613 Process_Convention (C, Def_Id);
6614 Note_Possible_Modification (Expression (Arg2));
6615 Process_Interface_Name (Def_Id, Arg3, Arg4);
6616 Set_Exported (Def_Id, Arg2);
6619 --------------------------
6620 -- External_Name_Casing --
6621 --------------------------
6623 -- pragma External_Name_Casing (
6624 -- UPPERCASE | LOWERCASE
6625 -- [, AS_IS | UPPERCASE | LOWERCASE]);
6627 when Pragma_External_Name_Casing => External_Name_Casing : declare
6630 Check_No_Identifiers;
6632 if Arg_Count = 2 then
6634 (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
6636 case Chars (Get_Pragma_Arg (Arg2)) is
6638 Opt.External_Name_Exp_Casing := As_Is;
6640 when Name_Uppercase =>
6641 Opt.External_Name_Exp_Casing := Uppercase;
6643 when Name_Lowercase =>
6644 Opt.External_Name_Exp_Casing := Lowercase;
6651 Check_Arg_Count (1);
6654 Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
6656 case Chars (Get_Pragma_Arg (Arg1)) is
6657 when Name_Uppercase =>
6658 Opt.External_Name_Imp_Casing := Uppercase;
6660 when Name_Lowercase =>
6661 Opt.External_Name_Imp_Casing := Lowercase;
6666 end External_Name_Casing;
6668 --------------------------
6669 -- Favor_Top_Level --
6670 --------------------------
6672 -- pragma Favor_Top_Level (type_NAME);
6674 when Pragma_Favor_Top_Level => Favor_Top_Level : declare
6675 Named_Entity : Entity_Id;
6679 Check_No_Identifiers;
6680 Check_Arg_Count (1);
6681 Check_Arg_Is_Local_Name (Arg1);
6682 Named_Entity := Entity (Expression (Arg1));
6684 -- If it's an access-to-subprogram type (in particular, not a
6685 -- subtype), set the flag on that type.
6687 if Is_Access_Subprogram_Type (Named_Entity) then
6688 Set_Can_Use_Internal_Rep (Named_Entity, False);
6690 -- Otherwise it's an error (name denotes the wrong sort of entity)
6694 ("access-to-subprogram type expected", Expression (Arg1));
6696 end Favor_Top_Level;
6702 -- pragma Fast_Math;
6704 when Pragma_Fast_Math =>
6706 Check_No_Identifiers;
6707 Check_Valid_Configuration_Pragma;
6710 ---------------------------
6711 -- Finalize_Storage_Only --
6712 ---------------------------
6714 -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
6716 when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
6717 Assoc : constant Node_Id := Arg1;
6718 Type_Id : constant Node_Id := Expression (Assoc);
6722 Check_No_Identifiers;
6723 Check_Arg_Count (1);
6724 Check_Arg_Is_Local_Name (Arg1);
6726 Find_Type (Type_Id);
6727 Typ := Entity (Type_Id);
6730 or else Rep_Item_Too_Early (Typ, N)
6734 Typ := Underlying_Type (Typ);
6737 if not Is_Controlled (Typ) then
6738 Error_Pragma ("pragma% must specify controlled type");
6741 Check_First_Subtype (Arg1);
6743 if Finalize_Storage_Only (Typ) then
6744 Error_Pragma ("duplicate pragma%, only one allowed");
6746 elsif not Rep_Item_Too_Late (Typ, N) then
6747 Set_Finalize_Storage_Only (Base_Type (Typ), True);
6749 end Finalize_Storage;
6751 --------------------------
6752 -- Float_Representation --
6753 --------------------------
6755 -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
6757 -- FLOAT_REP ::= VAX_Float | IEEE_Float
6759 when Pragma_Float_Representation => Float_Representation : declare
6767 if Arg_Count = 1 then
6768 Check_Valid_Configuration_Pragma;
6770 Check_Arg_Count (2);
6771 Check_Optional_Identifier (Arg2, Name_Entity);
6772 Check_Arg_Is_Local_Name (Arg2);
6775 Check_No_Identifier (Arg1);
6776 Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
6778 if not OpenVMS_On_Target then
6779 if Chars (Expression (Arg1)) = Name_VAX_Float then
6781 ("?pragma% ignored (applies only to Open'V'M'S)");
6787 -- One argument case
6789 if Arg_Count = 1 then
6790 if Chars (Expression (Arg1)) = Name_VAX_Float then
6791 if Opt.Float_Format = 'I' then
6792 Error_Pragma ("'I'E'E'E format previously specified");
6795 Opt.Float_Format := 'V';
6798 if Opt.Float_Format = 'V' then
6799 Error_Pragma ("'V'A'X format previously specified");
6802 Opt.Float_Format := 'I';
6805 Set_Standard_Fpt_Formats;
6807 -- Two argument case
6810 Argx := Get_Pragma_Arg (Arg2);
6812 if not Is_Entity_Name (Argx)
6813 or else not Is_Floating_Point_Type (Entity (Argx))
6816 ("second argument of% pragma must be floating-point type",
6820 Ent := Entity (Argx);
6821 Digs := UI_To_Int (Digits_Value (Ent));
6823 -- Two arguments, VAX_Float case
6825 if Chars (Expression (Arg1)) = Name_VAX_Float then
6827 when 6 => Set_F_Float (Ent);
6828 when 9 => Set_D_Float (Ent);
6829 when 15 => Set_G_Float (Ent);
6833 ("wrong digits value, must be 6,9 or 15", Arg2);
6836 -- Two arguments, IEEE_Float case
6840 when 6 => Set_IEEE_Short (Ent);
6841 when 15 => Set_IEEE_Long (Ent);
6845 ("wrong digits value, must be 6 or 15", Arg2);
6849 end Float_Representation;
6855 -- pragma Ident (static_string_EXPRESSION)
6857 -- Note: pragma Comment shares this processing. Pragma Comment
6858 -- is identical to Ident, except that the restriction of the
6859 -- argument to 31 characters and the placement restrictions
6860 -- are not enforced for pragma Comment.
6862 when Pragma_Ident | Pragma_Comment => Ident : declare
6867 Check_Arg_Count (1);
6868 Check_No_Identifiers;
6869 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
6871 -- For pragma Ident, preserve DEC compatibility by requiring
6872 -- the pragma to appear in a declarative part or package spec.
6874 if Prag_Id = Pragma_Ident then
6875 Check_Is_In_Decl_Part_Or_Package_Spec;
6878 Str := Expr_Value_S (Expression (Arg1));
6885 GP := Parent (Parent (N));
6887 if Nkind (GP) = N_Package_Declaration
6889 Nkind (GP) = N_Generic_Package_Declaration
6894 -- If we have a compilation unit, then record the ident
6895 -- value, checking for improper duplication.
6897 if Nkind (GP) = N_Compilation_Unit then
6898 CS := Ident_String (Current_Sem_Unit);
6900 if Present (CS) then
6902 -- For Ident, we do not permit multiple instances
6904 if Prag_Id = Pragma_Ident then
6905 Error_Pragma ("duplicate% pragma not permitted");
6907 -- For Comment, we concatenate the string, unless we
6908 -- want to preserve the tree structure for ASIS.
6910 elsif not ASIS_Mode then
6911 Start_String (Strval (CS));
6912 Store_String_Char (' ');
6913 Store_String_Chars (Strval (Str));
6914 Set_Strval (CS, End_String);
6918 -- In VMS, the effect of IDENT is achieved by passing
6919 -- IDENTIFICATION=name as a --for-linker switch.
6921 if OpenVMS_On_Target then
6924 ("--for-linker=IDENTIFICATION=");
6925 String_To_Name_Buffer (Strval (Str));
6926 Store_String_Chars (Name_Buffer (1 .. Name_Len));
6928 -- Only the last processed IDENT is saved. The main
6929 -- purpose is so an IDENT associated with a main
6930 -- procedure will be used in preference to an IDENT
6931 -- associated with a with'd package.
6933 Replace_Linker_Option_String
6934 (End_String, "--for-linker=IDENTIFICATION=");
6937 Set_Ident_String (Current_Sem_Unit, Str);
6940 -- For subunits, we just ignore the Ident, since in GNAT
6941 -- these are not separate object files, and hence not
6942 -- separate units in the unit table.
6944 elsif Nkind (GP) = N_Subunit then
6947 -- Otherwise we have a misplaced pragma Ident, but we ignore
6948 -- this if we are in an instantiation, since it comes from
6949 -- a generic, and has no relevance to the instantiation.
6951 elsif Prag_Id = Pragma_Ident then
6952 if Instantiation_Location (Loc) = No_Location then
6953 Error_Pragma ("pragma% only allowed at outer level");
6959 --------------------------
6960 -- Implemented_By_Entry --
6961 --------------------------
6963 -- pragma Implemented_By_Entry (DIRECT_NAME);
6965 when Pragma_Implemented_By_Entry => Implemented_By_Entry : declare
6970 Check_Arg_Count (1);
6971 Check_No_Identifiers;
6972 Check_Arg_Is_Identifier (Arg1);
6973 Check_Arg_Is_Local_Name (Arg1);
6974 Ent := Entity (Expression (Arg1));
6976 -- Pragma Implemented_By_Entry must be applied only to protected
6977 -- synchronized or task interface primitives.
6979 if (Ekind (Ent) /= E_Function
6980 and then Ekind (Ent) /= E_Procedure)
6981 or else not Present (First_Formal (Ent))
6982 or else not Is_Concurrent_Interface (Etype (First_Formal (Ent)))
6985 ("pragma % must be applied to a concurrent interface " &
6989 if Einfo.Implemented_By_Entry (Ent)
6990 and then Warn_On_Redundant_Constructs
6992 Error_Pragma ("?duplicate pragma%!");
6994 Set_Implemented_By_Entry (Ent);
6997 end Implemented_By_Entry;
6999 -----------------------
7000 -- Implicit_Packing --
7001 -----------------------
7003 -- pragma Implicit_Packing;
7005 when Pragma_Implicit_Packing =>
7007 Check_Arg_Count (0);
7008 Implicit_Packing := True;
7015 -- [Convention =>] convention_IDENTIFIER,
7016 -- [Entity =>] local_NAME
7017 -- [, [External_Name =>] static_string_EXPRESSION ]
7018 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7020 when Pragma_Import =>
7021 Check_Ada_83_Warning;
7027 Check_At_Least_N_Arguments (2);
7028 Check_At_Most_N_Arguments (4);
7029 Process_Import_Or_Interface;
7031 ----------------------
7032 -- Import_Exception --
7033 ----------------------
7035 -- pragma Import_Exception (
7036 -- [Internal =>] LOCAL_NAME
7037 -- [, [External =>] EXTERNAL_SYMBOL]
7038 -- [, [Form =>] Ada | VMS]
7039 -- [, [Code =>] static_integer_EXPRESSION]);
7041 when Pragma_Import_Exception => Import_Exception : declare
7042 Args : Args_List (1 .. 4);
7043 Names : constant Name_List (1 .. 4) := (
7049 Internal : Node_Id renames Args (1);
7050 External : Node_Id renames Args (2);
7051 Form : Node_Id renames Args (3);
7052 Code : Node_Id renames Args (4);
7055 Gather_Associations (Names, Args);
7057 if Present (External) and then Present (Code) then
7059 ("cannot give both External and Code options for pragma%");
7062 Process_Extended_Import_Export_Exception_Pragma (
7063 Arg_Internal => Internal,
7064 Arg_External => External,
7068 if not Is_VMS_Exception (Entity (Internal)) then
7069 Set_Imported (Entity (Internal));
7071 end Import_Exception;
7073 ---------------------
7074 -- Import_Function --
7075 ---------------------
7077 -- pragma Import_Function (
7078 -- [Internal =>] LOCAL_NAME,
7079 -- [, [External =>] EXTERNAL_SYMBOL]
7080 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7081 -- [, [Result_Type =>] SUBTYPE_MARK]
7082 -- [, [Mechanism =>] MECHANISM]
7083 -- [, [Result_Mechanism =>] MECHANISM_NAME]
7084 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7086 -- EXTERNAL_SYMBOL ::=
7088 -- | static_string_EXPRESSION
7090 -- PARAMETER_TYPES ::=
7092 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7094 -- TYPE_DESIGNATOR ::=
7096 -- | subtype_Name ' Access
7100 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7102 -- MECHANISM_ASSOCIATION ::=
7103 -- [formal_parameter_NAME =>] MECHANISM_NAME
7105 -- MECHANISM_NAME ::=
7108 -- | Descriptor [([Class =>] CLASS_NAME)]
7110 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7112 when Pragma_Import_Function => Import_Function : declare
7113 Args : Args_List (1 .. 7);
7114 Names : constant Name_List (1 .. 7) := (
7117 Name_Parameter_Types,
7120 Name_Result_Mechanism,
7121 Name_First_Optional_Parameter);
7123 Internal : Node_Id renames Args (1);
7124 External : Node_Id renames Args (2);
7125 Parameter_Types : Node_Id renames Args (3);
7126 Result_Type : Node_Id renames Args (4);
7127 Mechanism : Node_Id renames Args (5);
7128 Result_Mechanism : Node_Id renames Args (6);
7129 First_Optional_Parameter : Node_Id renames Args (7);
7133 Gather_Associations (Names, Args);
7134 Process_Extended_Import_Export_Subprogram_Pragma (
7135 Arg_Internal => Internal,
7136 Arg_External => External,
7137 Arg_Parameter_Types => Parameter_Types,
7138 Arg_Result_Type => Result_Type,
7139 Arg_Mechanism => Mechanism,
7140 Arg_Result_Mechanism => Result_Mechanism,
7141 Arg_First_Optional_Parameter => First_Optional_Parameter);
7142 end Import_Function;
7148 -- pragma Import_Object (
7149 -- [Internal =>] LOCAL_NAME
7150 -- [, [External =>] EXTERNAL_SYMBOL]
7151 -- [, [Size =>] EXTERNAL_SYMBOL]);
7153 -- EXTERNAL_SYMBOL ::=
7155 -- | static_string_EXPRESSION
7157 when Pragma_Import_Object => Import_Object : declare
7158 Args : Args_List (1 .. 3);
7159 Names : constant Name_List (1 .. 3) := (
7164 Internal : Node_Id renames Args (1);
7165 External : Node_Id renames Args (2);
7166 Size : Node_Id renames Args (3);
7170 Gather_Associations (Names, Args);
7171 Process_Extended_Import_Export_Object_Pragma (
7172 Arg_Internal => Internal,
7173 Arg_External => External,
7177 ----------------------
7178 -- Import_Procedure --
7179 ----------------------
7181 -- pragma Import_Procedure (
7182 -- [Internal =>] LOCAL_NAME
7183 -- [, [External =>] EXTERNAL_SYMBOL]
7184 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7185 -- [, [Mechanism =>] MECHANISM]
7186 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7188 -- EXTERNAL_SYMBOL ::=
7190 -- | static_string_EXPRESSION
7192 -- PARAMETER_TYPES ::=
7194 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7196 -- TYPE_DESIGNATOR ::=
7198 -- | subtype_Name ' Access
7202 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7204 -- MECHANISM_ASSOCIATION ::=
7205 -- [formal_parameter_NAME =>] MECHANISM_NAME
7207 -- MECHANISM_NAME ::=
7210 -- | Descriptor [([Class =>] CLASS_NAME)]
7212 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7214 when Pragma_Import_Procedure => Import_Procedure : declare
7215 Args : Args_List (1 .. 5);
7216 Names : constant Name_List (1 .. 5) := (
7219 Name_Parameter_Types,
7221 Name_First_Optional_Parameter);
7223 Internal : Node_Id renames Args (1);
7224 External : Node_Id renames Args (2);
7225 Parameter_Types : Node_Id renames Args (3);
7226 Mechanism : Node_Id renames Args (4);
7227 First_Optional_Parameter : Node_Id renames Args (5);
7231 Gather_Associations (Names, Args);
7232 Process_Extended_Import_Export_Subprogram_Pragma (
7233 Arg_Internal => Internal,
7234 Arg_External => External,
7235 Arg_Parameter_Types => Parameter_Types,
7236 Arg_Mechanism => Mechanism,
7237 Arg_First_Optional_Parameter => First_Optional_Parameter);
7238 end Import_Procedure;
7240 -----------------------------
7241 -- Import_Valued_Procedure --
7242 -----------------------------
7244 -- pragma Import_Valued_Procedure (
7245 -- [Internal =>] LOCAL_NAME
7246 -- [, [External =>] EXTERNAL_SYMBOL]
7247 -- [, [Parameter_Types =>] (PARAMETER_TYPES)]
7248 -- [, [Mechanism =>] MECHANISM]
7249 -- [, [First_Optional_Parameter =>] IDENTIFIER]);
7251 -- EXTERNAL_SYMBOL ::=
7253 -- | static_string_EXPRESSION
7255 -- PARAMETER_TYPES ::=
7257 -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
7259 -- TYPE_DESIGNATOR ::=
7261 -- | subtype_Name ' Access
7265 -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
7267 -- MECHANISM_ASSOCIATION ::=
7268 -- [formal_parameter_NAME =>] MECHANISM_NAME
7270 -- MECHANISM_NAME ::=
7273 -- | Descriptor [([Class =>] CLASS_NAME)]
7275 -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
7277 when Pragma_Import_Valued_Procedure =>
7278 Import_Valued_Procedure : declare
7279 Args : Args_List (1 .. 5);
7280 Names : constant Name_List (1 .. 5) := (
7283 Name_Parameter_Types,
7285 Name_First_Optional_Parameter);
7287 Internal : Node_Id renames Args (1);
7288 External : Node_Id renames Args (2);
7289 Parameter_Types : Node_Id renames Args (3);
7290 Mechanism : Node_Id renames Args (4);
7291 First_Optional_Parameter : Node_Id renames Args (5);
7295 Gather_Associations (Names, Args);
7296 Process_Extended_Import_Export_Subprogram_Pragma (
7297 Arg_Internal => Internal,
7298 Arg_External => External,
7299 Arg_Parameter_Types => Parameter_Types,
7300 Arg_Mechanism => Mechanism,
7301 Arg_First_Optional_Parameter => First_Optional_Parameter);
7302 end Import_Valued_Procedure;
7304 ------------------------
7305 -- Initialize_Scalars --
7306 ------------------------
7308 -- pragma Initialize_Scalars;
7310 when Pragma_Initialize_Scalars =>
7312 Check_Arg_Count (0);
7313 Check_Valid_Configuration_Pragma;
7314 Check_Restriction (No_Initialize_Scalars, N);
7316 if not Restriction_Active (No_Initialize_Scalars) then
7317 Init_Or_Norm_Scalars := True;
7318 Initialize_Scalars := True;
7325 -- pragma Inline ( NAME {, NAME} );
7327 when Pragma_Inline =>
7329 -- Pragma is active if inlining option is active
7331 Process_Inline (Inline_Active);
7337 -- pragma Inline_Always ( NAME {, NAME} );
7339 when Pragma_Inline_Always =>
7340 Process_Inline (True);
7342 --------------------
7343 -- Inline_Generic --
7344 --------------------
7346 -- pragma Inline_Generic (NAME {, NAME});
7348 when Pragma_Inline_Generic =>
7349 Process_Generic_List;
7351 ----------------------
7352 -- Inspection_Point --
7353 ----------------------
7355 -- pragma Inspection_Point [(object_NAME {, object_NAME})];
7357 when Pragma_Inspection_Point => Inspection_Point : declare
7362 if Arg_Count > 0 then
7365 Exp := Expression (Arg);
7368 if not Is_Entity_Name (Exp)
7369 or else not Is_Object (Entity (Exp))
7371 Error_Pragma_Arg ("object name required", Arg);
7378 end Inspection_Point;
7384 -- pragma Interface (
7385 -- [ Convention =>] convention_IDENTIFIER,
7386 -- [ Entity =>] local_NAME
7387 -- [, [External_Name =>] static_string_EXPRESSION ]
7388 -- [, [Link_Name =>] static_string_EXPRESSION ]);
7390 when Pragma_Interface =>
7397 Check_At_Least_N_Arguments (2);
7398 Check_At_Most_N_Arguments (4);
7399 Process_Import_Or_Interface;
7401 --------------------
7402 -- Interface_Name --
7403 --------------------
7405 -- pragma Interface_Name (
7406 -- [ Entity =>] local_NAME
7407 -- [,[External_Name =>] static_string_EXPRESSION ]
7408 -- [,[Link_Name =>] static_string_EXPRESSION ]);
7410 when Pragma_Interface_Name => Interface_Name : declare
7419 ((Name_Entity, Name_External_Name, Name_Link_Name));
7420 Check_At_Least_N_Arguments (2);
7421 Check_At_Most_N_Arguments (3);
7422 Id := Expression (Arg1);
7425 if not Is_Entity_Name (Id) then
7427 ("first argument for pragma% must be entity name", Arg1);
7428 elsif Etype (Id) = Any_Type then
7431 Def_Id := Entity (Id);
7434 -- Special DEC-compatible processing for the object case,
7435 -- forces object to be imported.
7437 if Ekind (Def_Id) = E_Variable then
7438 Kill_Size_Check_Code (Def_Id);
7439 Note_Possible_Modification (Id);
7441 -- Initialization is not allowed for imported variable
7443 if Present (Expression (Parent (Def_Id)))
7444 and then Comes_From_Source (Expression (Parent (Def_Id)))
7446 Error_Msg_Sloc := Sloc (Def_Id);
7448 ("no initialization allowed for declaration of& #",
7452 -- For compatibility, support VADS usage of providing both
7453 -- pragmas Interface and Interface_Name to obtain the effect
7454 -- of a single Import pragma.
7456 if Is_Imported (Def_Id)
7457 and then Present (First_Rep_Item (Def_Id))
7458 and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
7460 Pragma_Name (First_Rep_Item (Def_Id)) = Name_Interface
7464 Set_Imported (Def_Id);
7467 Set_Is_Public (Def_Id);
7468 Process_Interface_Name (Def_Id, Arg2, Arg3);
7471 -- Otherwise must be subprogram
7473 elsif not Is_Subprogram (Def_Id) then
7475 ("argument of pragma% is not subprogram", Arg1);
7478 Check_At_Most_N_Arguments (3);
7482 -- Loop through homonyms
7485 Def_Id := Get_Base_Subprogram (Hom_Id);
7487 if Is_Imported (Def_Id) then
7488 Process_Interface_Name (Def_Id, Arg2, Arg3);
7492 Hom_Id := Homonym (Hom_Id);
7494 exit when No (Hom_Id)
7495 or else Scope (Hom_Id) /= Current_Scope;
7500 ("argument of pragma% is not imported subprogram",
7506 -----------------------
7507 -- Interrupt_Handler --
7508 -----------------------
7510 -- pragma Interrupt_Handler (handler_NAME);
7512 when Pragma_Interrupt_Handler =>
7513 Check_Ada_83_Warning;
7514 Check_Arg_Count (1);
7515 Check_No_Identifiers;
7517 if No_Run_Time_Mode then
7518 Error_Msg_CRT ("Interrupt_Handler pragma", N);
7520 Check_Interrupt_Or_Attach_Handler;
7521 Process_Interrupt_Or_Attach_Handler;
7524 ------------------------
7525 -- Interrupt_Priority --
7526 ------------------------
7528 -- pragma Interrupt_Priority [(EXPRESSION)];
7530 when Pragma_Interrupt_Priority => Interrupt_Priority : declare
7531 P : constant Node_Id := Parent (N);
7535 Check_Ada_83_Warning;
7537 if Arg_Count /= 0 then
7538 Arg := Expression (Arg1);
7539 Check_Arg_Count (1);
7540 Check_No_Identifiers;
7542 -- The expression must be analyzed in the special manner
7543 -- described in "Handling of Default and Per-Object
7544 -- Expressions" in sem.ads.
7546 Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
7549 if Nkind (P) /= N_Task_Definition
7550 and then Nkind (P) /= N_Protected_Definition
7555 elsif Has_Priority_Pragma (P) then
7556 Error_Pragma ("duplicate pragma% not allowed");
7559 Set_Has_Priority_Pragma (P, True);
7560 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
7562 end Interrupt_Priority;
7564 ---------------------
7565 -- Interrupt_State --
7566 ---------------------
7568 -- pragma Interrupt_State (
7569 -- [Name =>] INTERRUPT_ID,
7570 -- [State =>] INTERRUPT_STATE);
7572 -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
7573 -- INTERRUPT_STATE => System | Runtime | User
7575 -- Note: if the interrupt id is given as an identifier, then
7576 -- it must be one of the identifiers in Ada.Interrupts.Names.
7577 -- Otherwise it is given as a static integer expression which
7578 -- must be in the range of Ada.Interrupts.Interrupt_ID.
7580 when Pragma_Interrupt_State => Interrupt_State : declare
7582 Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
7583 -- This is the entity Ada.Interrupts.Interrupt_ID;
7585 State_Type : Character;
7586 -- Set to 's'/'r'/'u' for System/Runtime/User
7589 -- Index to entry in Interrupt_States table
7592 -- Value of interrupt
7594 Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
7595 -- The first argument to the pragma
7597 Int_Ent : Entity_Id;
7598 -- Interrupt entity in Ada.Interrupts.Names
7602 Check_Arg_Order ((Name_Name, Name_State));
7603 Check_Arg_Count (2);
7605 Check_Optional_Identifier (Arg1, Name_Name);
7606 Check_Optional_Identifier (Arg2, Name_State);
7607 Check_Arg_Is_Identifier (Arg2);
7609 -- First argument is identifier
7611 if Nkind (Arg1X) = N_Identifier then
7613 -- Search list of names in Ada.Interrupts.Names
7615 Int_Ent := First_Entity (RTE (RE_Names));
7617 if No (Int_Ent) then
7618 Error_Pragma_Arg ("invalid interrupt name", Arg1);
7620 elsif Chars (Int_Ent) = Chars (Arg1X) then
7621 Int_Val := Expr_Value (Constant_Value (Int_Ent));
7625 Next_Entity (Int_Ent);
7628 -- First argument is not an identifier, so it must be a
7629 -- static expression of type Ada.Interrupts.Interrupt_ID.
7632 Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
7633 Int_Val := Expr_Value (Arg1X);
7635 if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
7637 Int_Val > Expr_Value (Type_High_Bound (Int_Id))
7640 ("value not in range of type " &
7641 """Ada.Interrupts.Interrupt_'I'D""", Arg1);
7647 case Chars (Get_Pragma_Arg (Arg2)) is
7648 when Name_Runtime => State_Type := 'r';
7649 when Name_System => State_Type := 's';
7650 when Name_User => State_Type := 'u';
7653 Error_Pragma_Arg ("invalid interrupt state", Arg2);
7656 -- Check if entry is already stored
7658 IST_Num := Interrupt_States.First;
7660 -- If entry not found, add it
7662 if IST_Num > Interrupt_States.Last then
7663 Interrupt_States.Append
7664 ((Interrupt_Number => UI_To_Int (Int_Val),
7665 Interrupt_State => State_Type,
7666 Pragma_Loc => Loc));
7669 -- Case of entry for the same entry
7671 elsif Int_Val = Interrupt_States.Table (IST_Num).
7674 -- If state matches, done, no need to make redundant entry
7677 State_Type = Interrupt_States.Table (IST_Num).
7680 -- Otherwise if state does not match, error
7683 Interrupt_States.Table (IST_Num).Pragma_Loc;
7685 ("state conflicts with that given #", Arg2);
7689 IST_Num := IST_Num + 1;
7691 end Interrupt_State;
7693 ----------------------
7694 -- Java_Constructor --
7695 ----------------------
7697 -- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
7699 -- Also handles pragma CIL_Constructor
7701 when Pragma_CIL_Constructor | Pragma_Java_Constructor =>
7702 Java_Constructor : declare
7706 Convention : Convention_Id;
7710 Check_Arg_Count (1);
7711 Check_Optional_Identifier (Arg1, Name_Entity);
7712 Check_Arg_Is_Local_Name (Arg1);
7714 Id := Expression (Arg1);
7715 Find_Program_Unit_Name (Id);
7717 -- If we did not find the name, we are done
7719 if Etype (Id) = Any_Type then
7724 when Pragma_CIL_Constructor => Convention := Convention_CIL;
7725 when Pragma_Java_Constructor => Convention := Convention_Java;
7726 when others => null;
7729 Hom_Id := Entity (Id);
7731 -- Loop through homonyms
7734 Def_Id := Get_Base_Subprogram (Hom_Id);
7736 -- The constructor is required to be a function returning an
7737 -- access type whose designated type has convention Java/CIL.
7739 if Ekind (Def_Id) = E_Function
7741 (Is_Value_Type (Etype (Def_Id))
7743 (Ekind (Etype (Def_Id)) in Access_Kind
7746 (Designated_Type (Etype (Def_Id))) = Convention
7749 (Root_Type (Designated_Type (Etype (Def_Id)))) =
7752 Set_Is_Constructor (Def_Id);
7753 Set_Convention (Def_Id, Convention);
7754 Set_Is_Imported (Def_Id);
7757 if Convention = Convention_Java then
7759 ("pragma% requires function returning a " &
7760 "'Java access type", Arg1);
7762 pragma Assert (Convention = Convention_CIL);
7764 ("pragma% requires function returning a " &
7765 "'CIL access type", Arg1);
7769 Hom_Id := Homonym (Hom_Id);
7771 exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
7773 end Java_Constructor;
7775 ----------------------
7776 -- Java_Interface --
7777 ----------------------
7779 -- pragma Java_Interface ([Entity =>] LOCAL_NAME);
7781 when Pragma_Java_Interface => Java_Interface : declare
7787 Check_Arg_Count (1);
7788 Check_Optional_Identifier (Arg1, Name_Entity);
7789 Check_Arg_Is_Local_Name (Arg1);
7791 Arg := Expression (Arg1);
7794 if Etype (Arg) = Any_Type then
7798 if not Is_Entity_Name (Arg)
7799 or else not Is_Type (Entity (Arg))
7801 Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
7804 Typ := Underlying_Type (Entity (Arg));
7806 -- For now we simply check some of the semantic constraints
7807 -- on the type. This currently leaves out some restrictions
7808 -- on interface types, namely that the parent type must be
7809 -- java.lang.Object.Typ and that all primitives of the type
7810 -- should be declared abstract. ???
7812 if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then
7813 Error_Pragma_Arg ("pragma% requires an abstract "
7814 & "tagged type", Arg1);
7816 elsif not Has_Discriminants (Typ)
7817 or else Ekind (Etype (First_Discriminant (Typ)))
7818 /= E_Anonymous_Access_Type
7820 not Is_Class_Wide_Type
7821 (Designated_Type (Etype (First_Discriminant (Typ))))
7824 ("type must have a class-wide access discriminant", Arg1);
7832 -- pragma Keep_Names ([On => ] local_NAME);
7834 when Pragma_Keep_Names => Keep_Names : declare
7839 Check_Arg_Count (1);
7840 Check_Optional_Identifier (Arg1, Name_On);
7841 Check_Arg_Is_Local_Name (Arg1);
7843 Arg := Expression (Arg1);
7846 if Etype (Arg) = Any_Type then
7850 if not Is_Entity_Name (Arg)
7851 or else Ekind (Entity (Arg)) /= E_Enumeration_Type
7854 ("pragma% requires a local enumeration type", Arg1);
7857 Set_Discard_Names (Entity (Arg), False);
7864 -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
7866 when Pragma_License =>
7868 Check_Arg_Count (1);
7869 Check_No_Identifiers;
7870 Check_Valid_Configuration_Pragma;
7871 Check_Arg_Is_Identifier (Arg1);
7874 Sind : constant Source_File_Index :=
7875 Source_Index (Current_Sem_Unit);
7878 case Chars (Get_Pragma_Arg (Arg1)) is
7880 Set_License (Sind, GPL);
7882 when Name_Modified_GPL =>
7883 Set_License (Sind, Modified_GPL);
7885 when Name_Restricted =>
7886 Set_License (Sind, Restricted);
7888 when Name_Unrestricted =>
7889 Set_License (Sind, Unrestricted);
7892 Error_Pragma_Arg ("invalid license name", Arg1);
7900 -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
7902 when Pragma_Link_With => Link_With : declare
7908 if Operating_Mode = Generate_Code
7909 and then In_Extended_Main_Source_Unit (N)
7911 Check_At_Least_N_Arguments (1);
7912 Check_No_Identifiers;
7913 Check_Is_In_Decl_Part_Or_Package_Spec;
7914 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
7918 while Present (Arg) loop
7919 Check_Arg_Is_Static_Expression (Arg, Standard_String);
7921 -- Store argument, converting sequences of spaces
7922 -- to a single null character (this is one of the
7923 -- differences in processing between Link_With
7924 -- and Linker_Options).
7927 C : constant Char_Code := Get_Char_Code (' ');
7928 S : constant String_Id :=
7929 Strval (Expr_Value_S (Expression (Arg)));
7930 L : constant Nat := String_Length (S);
7933 procedure Skip_Spaces;
7934 -- Advance F past any spaces
7940 procedure Skip_Spaces is
7942 while F <= L and then Get_String_Char (S, F) = C loop
7947 -- Start of processing for Arg_Store
7950 Skip_Spaces; -- skip leading spaces
7952 -- Loop through characters, changing any embedded
7953 -- sequence of spaces to a single null character
7954 -- (this is how Link_With/Linker_Options differ)
7957 if Get_String_Char (S, F) = C then
7960 Store_String_Char (ASCII.NUL);
7963 Store_String_Char (Get_String_Char (S, F));
7971 if Present (Arg) then
7972 Store_String_Char (ASCII.NUL);
7976 Store_Linker_Option_String (End_String);
7984 -- pragma Linker_Alias (
7985 -- [Entity =>] LOCAL_NAME
7986 -- [Target =>] static_string_EXPRESSION);
7988 when Pragma_Linker_Alias =>
7990 Check_Arg_Order ((Name_Entity, Name_Target));
7991 Check_Arg_Count (2);
7992 Check_Optional_Identifier (Arg1, Name_Entity);
7993 Check_Optional_Identifier (Arg2, Name_Target);
7994 Check_Arg_Is_Library_Level_Local_Name (Arg1);
7995 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
7997 -- The only processing required is to link this item on to the
7998 -- list of rep items for the given entity. This is accomplished
7999 -- by the call to Rep_Item_Too_Late (when no error is detected
8000 -- and False is returned).
8002 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8005 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8008 ------------------------
8009 -- Linker_Constructor --
8010 ------------------------
8012 -- pragma Linker_Constructor (procedure_LOCAL_NAME);
8014 -- Code is shared with Linker_Destructor
8016 -----------------------
8017 -- Linker_Destructor --
8018 -----------------------
8020 -- pragma Linker_Destructor (procedure_LOCAL_NAME);
8022 when Pragma_Linker_Constructor |
8023 Pragma_Linker_Destructor =>
8024 Linker_Constructor : declare
8030 Check_Arg_Count (1);
8031 Check_No_Identifiers;
8032 Check_Arg_Is_Local_Name (Arg1);
8033 Arg1_X := Expression (Arg1);
8035 Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
8037 if not Is_Library_Level_Entity (Proc) then
8039 ("argument for pragma% must be library level entity", Arg1);
8042 -- The only processing required is to link this item on to the
8043 -- list of rep items for the given entity. This is accomplished
8044 -- by the call to Rep_Item_Too_Late (when no error is detected
8045 -- and False is returned).
8047 if Rep_Item_Too_Late (Proc, N) then
8050 Set_Has_Gigi_Rep_Item (Proc);
8052 end Linker_Constructor;
8054 --------------------
8055 -- Linker_Options --
8056 --------------------
8058 -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
8060 when Pragma_Linker_Options => Linker_Options : declare
8064 Check_Ada_83_Warning;
8065 Check_No_Identifiers;
8066 Check_Arg_Count (1);
8067 Check_Is_In_Decl_Part_Or_Package_Spec;
8069 if Operating_Mode = Generate_Code
8070 and then In_Extended_Main_Source_Unit (N)
8072 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8073 Start_String (Strval (Expr_Value_S (Expression (Arg1))));
8076 while Present (Arg) loop
8077 Check_Arg_Is_Static_Expression (Arg, Standard_String);
8078 Store_String_Char (ASCII.NUL);
8080 (Strval (Expr_Value_S (Expression (Arg))));
8084 Store_Linker_Option_String (End_String);
8088 --------------------
8089 -- Linker_Section --
8090 --------------------
8092 -- pragma Linker_Section (
8093 -- [Entity =>] LOCAL_NAME
8094 -- [Section =>] static_string_EXPRESSION);
8096 when Pragma_Linker_Section =>
8098 Check_Arg_Order ((Name_Entity, Name_Section));
8099 Check_Arg_Count (2);
8100 Check_Optional_Identifier (Arg1, Name_Entity);
8101 Check_Optional_Identifier (Arg2, Name_Section);
8102 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8103 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8105 -- The only processing required is to link this item on to the
8106 -- list of rep items for the given entity. This is accomplished
8107 -- by the call to Rep_Item_Too_Late (when no error is detected
8108 -- and False is returned).
8110 if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
8113 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8120 -- pragma List (On | Off)
8122 -- There is nothing to do here, since we did all the processing
8123 -- for this pragma in Par.Prag (so that it works properly even in
8124 -- syntax only mode)
8129 --------------------
8130 -- Locking_Policy --
8131 --------------------
8133 -- pragma Locking_Policy (policy_IDENTIFIER);
8135 when Pragma_Locking_Policy => declare
8139 Check_Ada_83_Warning;
8140 Check_Arg_Count (1);
8141 Check_No_Identifiers;
8142 Check_Arg_Is_Locking_Policy (Arg1);
8143 Check_Valid_Configuration_Pragma;
8144 Get_Name_String (Chars (Expression (Arg1)));
8145 LP := Fold_Upper (Name_Buffer (1));
8147 if Locking_Policy /= ' '
8148 and then Locking_Policy /= LP
8150 Error_Msg_Sloc := Locking_Policy_Sloc;
8151 Error_Pragma ("locking policy incompatible with policy#");
8153 -- Set new policy, but always preserve System_Location since
8154 -- we like the error message with the run time name.
8157 Locking_Policy := LP;
8159 if Locking_Policy_Sloc /= System_Location then
8160 Locking_Policy_Sloc := Loc;
8169 -- pragma Long_Float (D_Float | G_Float);
8171 when Pragma_Long_Float =>
8173 Check_Valid_Configuration_Pragma;
8174 Check_Arg_Count (1);
8175 Check_No_Identifier (Arg1);
8176 Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
8178 if not OpenVMS_On_Target then
8179 Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
8184 if Chars (Expression (Arg1)) = Name_D_Float then
8185 if Opt.Float_Format_Long = 'G' then
8186 Error_Pragma ("G_Float previously specified");
8189 Opt.Float_Format_Long := 'D';
8191 -- G_Float case (this is the default, does not need overriding)
8194 if Opt.Float_Format_Long = 'D' then
8195 Error_Pragma ("D_Float previously specified");
8198 Opt.Float_Format_Long := 'G';
8201 Set_Standard_Fpt_Formats;
8203 -----------------------
8204 -- Machine_Attribute --
8205 -----------------------
8207 -- pragma Machine_Attribute (
8208 -- [Entity =>] LOCAL_NAME,
8209 -- [Attribute_Name =>] static_string_EXPRESSION
8210 -- [, [Info =>] static_string_EXPRESSION] );
8212 when Pragma_Machine_Attribute => Machine_Attribute : declare
8217 Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
8219 if Arg_Count = 3 then
8220 Check_Optional_Identifier (Arg3, Name_Info);
8221 Check_Arg_Is_Static_Expression (Arg3, Standard_String);
8223 Check_Arg_Count (2);
8226 Check_Optional_Identifier (Arg1, Name_Entity);
8227 Check_Optional_Identifier (Arg2, Name_Attribute_Name);
8228 Check_Arg_Is_Local_Name (Arg1);
8229 Check_Arg_Is_Static_Expression (Arg2, Standard_String);
8230 Def_Id := Entity (Expression (Arg1));
8232 if Is_Access_Type (Def_Id) then
8233 Def_Id := Designated_Type (Def_Id);
8236 if Rep_Item_Too_Early (Def_Id, N) then
8240 Def_Id := Underlying_Type (Def_Id);
8242 -- The only processing required is to link this item on to the
8243 -- list of rep items for the given entity. This is accomplished
8244 -- by the call to Rep_Item_Too_Late (when no error is detected
8245 -- and False is returned).
8247 if Rep_Item_Too_Late (Def_Id, N) then
8250 Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
8252 end Machine_Attribute;
8259 -- (MAIN_OPTION [, MAIN_OPTION]);
8262 -- [STACK_SIZE =>] static_integer_EXPRESSION
8263 -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION
8264 -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION
8266 when Pragma_Main => Main : declare
8267 Args : Args_List (1 .. 3);
8268 Names : constant Name_List (1 .. 3) := (
8270 Name_Task_Stack_Size_Default,
8271 Name_Time_Slicing_Enabled);
8277 Gather_Associations (Names, Args);
8279 for J in 1 .. 2 loop
8280 if Present (Args (J)) then
8281 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8285 if Present (Args (3)) then
8286 Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
8290 while Present (Nod) loop
8291 if Nkind (Nod) = N_Pragma
8292 and then Pragma_Name (Nod) = Name_Main
8294 Error_Msg_Name_1 := Pname;
8295 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8306 -- pragma Main_Storage
8307 -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
8309 -- MAIN_STORAGE_OPTION ::=
8310 -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
8311 -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
8313 when Pragma_Main_Storage => Main_Storage : declare
8314 Args : Args_List (1 .. 2);
8315 Names : constant Name_List (1 .. 2) := (
8316 Name_Working_Storage,
8323 Gather_Associations (Names, Args);
8325 for J in 1 .. 2 loop
8326 if Present (Args (J)) then
8327 Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
8331 Check_In_Main_Program;
8334 while Present (Nod) loop
8335 if Nkind (Nod) = N_Pragma
8336 and then Pragma_Name (Nod) = Name_Main_Storage
8338 Error_Msg_Name_1 := Pname;
8339 Error_Msg_N ("duplicate pragma% not permitted", Nod);
8350 -- pragma Memory_Size (NUMERIC_LITERAL)
8352 when Pragma_Memory_Size =>
8355 -- Memory size is simply ignored
8357 Check_No_Identifiers;
8358 Check_Arg_Count (1);
8359 Check_Arg_Is_Integer_Literal (Arg1);
8367 -- The only correct use of this pragma is on its own in a file, in
8368 -- which case it is specially processed (see Gnat1drv.Check_Bad_Body
8369 -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to
8370 -- check for a file containing nothing but a No_Body pragma). If we
8371 -- attempt to process it during normal semantics processing, it means
8372 -- it was misplaced.
8374 when Pragma_No_Body =>
8375 Error_Pragma ("misplaced pragma %");
8381 -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
8383 when Pragma_No_Return => No_Return : declare
8391 Check_At_Least_N_Arguments (1);
8393 -- Loop through arguments of pragma
8396 while Present (Arg) loop
8397 Check_Arg_Is_Local_Name (Arg);
8398 Id := Expression (Arg);
8401 if not Is_Entity_Name (Id) then
8402 Error_Pragma_Arg ("entity name required", Arg);
8405 if Etype (Id) = Any_Type then
8409 -- Loop to find matching procedures
8414 and then Scope (E) = Current_Scope
8416 if Ekind (E) = E_Procedure
8417 or else Ekind (E) = E_Generic_Procedure
8421 -- Set flag on any alias as well
8423 if Is_Overloadable (E) and then Present (Alias (E)) then
8424 Set_No_Return (Alias (E));
8434 Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
8441 ------------------------
8442 -- No_Strict_Aliasing --
8443 ------------------------
8445 -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
8447 when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
8452 Check_At_Most_N_Arguments (1);
8454 if Arg_Count = 0 then
8455 Check_Valid_Configuration_Pragma;
8456 Opt.No_Strict_Aliasing := True;
8459 Check_Optional_Identifier (Arg2, Name_Entity);
8460 Check_Arg_Is_Local_Name (Arg1);
8461 E_Id := Entity (Expression (Arg1));
8463 if E_Id = Any_Type then
8465 elsif No (E_Id) or else not Is_Access_Type (E_Id) then
8466 Error_Pragma_Arg ("pragma% requires access type", Arg1);
8469 Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
8471 end No_Strict_Alias;
8477 -- pragma Obsolescent [(
8478 -- [Entity => NAME,]
8479 -- [(static_string_EXPRESSION [, Ada_05])];
8481 when Pragma_Obsolescent => Obsolescent : declare
8485 procedure Set_Obsolescent (E : Entity_Id);
8486 -- Given an entity Ent, mark it as obsolescent if appropriate
8488 ---------------------
8489 -- Set_Obsolescent --
8490 ---------------------
8492 procedure Set_Obsolescent (E : Entity_Id) is
8501 -- Entity name was given
8503 if Present (Ename) then
8505 -- If entity name matches, we are fine
8507 if Chars (Ename) = Chars (Ent) then
8510 -- If entity name does not match, only possibility is an
8511 -- enumeration literal from an enumeration type declaration.
8513 elsif Ekind (Ent) /= E_Enumeration_Type then
8515 ("pragma % entity name does not match declaration");
8518 Ent := First_Literal (E);
8522 ("pragma % entity name does not match any " &
8523 "enumeration literal");
8525 elsif Chars (Ent) = Chars (Ename) then
8529 Ent := Next_Literal (Ent);
8535 -- Ent points to entity to be marked
8537 if Arg_Count >= 1 then
8539 -- Deal with static string argument
8541 Check_Arg_Is_Static_Expression (Arg1, Standard_String);
8542 S := Strval (Expression (Arg1));
8544 for J in 1 .. String_Length (S) loop
8545 if not In_Character_Range (Get_String_Char (S, J)) then
8547 ("pragma% argument does not allow wide characters",
8552 Set_Obsolescent_Warning (Ent, Expression (Arg1));
8554 -- Check for Ada_05 parameter
8556 if Arg_Count /= 1 then
8557 Check_Arg_Count (2);
8560 Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
8563 Check_Arg_Is_Identifier (Argx);
8565 if Chars (Argx) /= Name_Ada_05 then
8566 Error_Msg_Name_2 := Name_Ada_05;
8568 ("only allowed argument for pragma% is %", Argx);
8571 if Ada_Version_Explicit < Ada_05
8572 or else not Warn_On_Ada_2005_Compatibility
8580 -- Set flag if pragma active
8583 Set_Is_Obsolescent (Ent);
8587 end Set_Obsolescent;
8589 -- Start of processing for pragma Obsolescent
8594 Check_At_Most_N_Arguments (3);
8596 -- See if first argument specifies an entity name
8599 and then Chars (Arg1) = Name_Entity
8601 Ename := Get_Pragma_Arg (Arg1);
8603 if Nkind (Ename) /= N_Character_Literal
8605 Nkind (Ename) /= N_Identifier
8607 Nkind (Ename) /= N_Operator_Symbol
8609 Error_Pragma_Arg ("entity name expected for pragma%", Arg1);
8612 -- Eliminate first argument, so we can share processing
8616 Arg_Count := Arg_Count - 1;
8618 -- No Entity name argument given
8624 Check_No_Identifiers;
8626 -- Get immediately preceding declaration
8629 while Present (Decl) and then Nkind (Decl) = N_Pragma loop
8633 -- Cases where we do not follow anything other than another pragma
8637 -- First case: library level compilation unit declaration with
8638 -- the pragma immediately following the declaration.
8640 if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
8642 (Defining_Entity (Unit (Parent (Parent (N)))));
8645 -- Case 2: library unit placement for package
8649 Ent : constant Entity_Id := Find_Lib_Unit_Name;
8651 if Ekind (Ent) = E_Package
8652 or else Ekind (Ent) = E_Generic_Package
8654 Set_Obsolescent (Ent);
8660 -- Cases where we must follow a declaration
8663 if Nkind (Decl) not in N_Declaration
8664 and then Nkind (Decl) not in N_Later_Decl_Item
8665 and then Nkind (Decl) not in N_Generic_Declaration
8668 ("pragma% misplaced, " &
8669 "must immediately follow a declaration");
8672 Set_Obsolescent (Defining_Entity (Decl));
8682 -- pragma No_Run_Time
8684 -- Note: this pragma is retained for backwards compatibiltiy.
8685 -- See body of Rtsfind for full details on its handling.
8687 when Pragma_No_Run_Time =>
8689 Check_Valid_Configuration_Pragma;
8690 Check_Arg_Count (0);
8692 No_Run_Time_Mode := True;
8693 Configurable_Run_Time_Mode := True;
8695 -- Set Duration to 32 bits if word size is 32
8697 if Ttypes.System_Word_Size = 32 then
8698 Duration_32_Bits_On_Target := True;
8701 -- Set appropriate restrictions
8703 Set_Restriction (No_Finalization, N);
8704 Set_Restriction (No_Exception_Handlers, N);
8705 Set_Restriction (Max_Tasks, N, 0);
8706 Set_Restriction (No_Tasking, N);
8708 -----------------------
8709 -- Normalize_Scalars --
8710 -----------------------
8712 -- pragma Normalize_Scalars;
8714 when Pragma_Normalize_Scalars =>
8715 Check_Ada_83_Warning;
8716 Check_Arg_Count (0);
8717 Check_Valid_Configuration_Pragma;
8718 Normalize_Scalars := True;
8719 Init_Or_Norm_Scalars := True;
8725 -- pragma Optimize (Time | Space | Off);
8727 -- The actual check for optimize is done in Gigi. Note that this
8728 -- pragma does not actually change the optimization setting, it
8729 -- simply checks that it is consistent with the pragma.
8731 when Pragma_Optimize =>
8732 Check_No_Identifiers;
8733 Check_Arg_Count (1);
8734 Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
8736 ------------------------
8737 -- Optimize_Alignment --
8738 ------------------------
8740 -- pragma Optimize_Alignment (Time | Space | Off);
8742 when Pragma_Optimize_Alignment =>
8744 Check_No_Identifiers;
8745 Check_Arg_Count (1);
8746 Check_Valid_Configuration_Pragma;
8749 Nam : constant Name_Id := Chars (Get_Pragma_Arg (Arg1));
8753 Opt.Optimize_Alignment := 'T';
8755 Opt.Optimize_Alignment := 'S';
8757 Opt.Optimize_Alignment := 'O';
8759 Error_Pragma_Arg ("invalid argument for pragma%", Arg1);
8767 -- pragma Pack (first_subtype_LOCAL_NAME);
8769 when Pragma_Pack => Pack : declare
8770 Assoc : constant Node_Id := Arg1;
8775 Check_No_Identifiers;
8776 Check_Arg_Count (1);
8777 Check_Arg_Is_Local_Name (Arg1);
8779 Type_Id := Expression (Assoc);
8780 Find_Type (Type_Id);
8781 Typ := Entity (Type_Id);
8784 or else Rep_Item_Too_Early (Typ, N)
8788 Typ := Underlying_Type (Typ);
8791 if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
8792 Error_Pragma ("pragma% must specify array or record type");
8795 Check_First_Subtype (Arg1);
8797 if Has_Pragma_Pack (Typ) then
8798 Error_Pragma ("duplicate pragma%, only one allowed");
8802 elsif Is_Array_Type (Typ) then
8804 -- Pack not allowed for aliased or atomic components
8806 if Has_Aliased_Components (Base_Type (Typ)) then
8808 ("pragma% ignored, cannot pack aliased components?");
8810 elsif Has_Atomic_Components (Typ)
8811 or else Is_Atomic (Component_Type (Typ))
8814 ("?pragma% ignored, cannot pack atomic components");
8817 -- If we had an explicit component size given, then we do not
8818 -- let Pack override this given size. We also give a warning
8819 -- that Pack is being ignored unless we can tell for sure that
8820 -- the Pack would not have had any effect anyway.
8822 if Has_Component_Size_Clause (Typ) then
8823 if Known_Static_RM_Size (Component_Type (Typ))
8825 RM_Size (Component_Type (Typ)) = Component_Size (Typ)
8830 ("?pragma% ignored, explicit component size given");
8833 -- If no prior array component size given, Pack is effective
8836 if not Rep_Item_Too_Late (Typ, N) then
8837 if VM_Target = No_VM then
8838 Set_Is_Packed (Base_Type (Typ));
8839 elsif not GNAT_Mode then
8841 ("?pragma% ignored in this configuration");
8844 Set_Has_Pragma_Pack (Base_Type (Typ));
8845 Set_Has_Non_Standard_Rep (Base_Type (Typ));
8849 -- For record types, the pack is always effective
8851 else pragma Assert (Is_Record_Type (Typ));
8852 if not Rep_Item_Too_Late (Typ, N) then
8853 if VM_Target = No_VM then
8854 Set_Is_Packed (Base_Type (Typ));
8855 elsif not GNAT_Mode then
8856 Error_Pragma ("?pragma% ignored in this configuration");
8859 Set_Has_Pragma_Pack (Base_Type (Typ));
8860 Set_Has_Non_Standard_Rep (Base_Type (Typ));
8871 -- There is nothing to do here, since we did all the processing
8872 -- for this pragma in Par.Prag (so that it works properly even in
8873 -- syntax only mode)
8882 -- pragma Passive [(PASSIVE_FORM)];
8884 -- PASSIVE_FORM ::= Semaphore | No
8886 when Pragma_Passive =>
8889 if Nkind (Parent (N)) /= N_Task_Definition then
8890 Error_Pragma ("pragma% must be within task definition");
8893 if Arg_Count /= 0 then
8894 Check_Arg_Count (1);
8895 Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
8898 ----------------------------------
8899 -- Preelaborable_Initialization --
8900 ----------------------------------
8902 -- pragma Preelaborable_Initialization (DIRECT_NAME);
8904 when Pragma_Preelaborable_Initialization => Preelab_Init : declare
8909 Check_Arg_Count (1);
8910 Check_No_Identifiers;
8911 Check_Arg_Is_Identifier (Arg1);
8912 Check_Arg_Is_Local_Name (Arg1);
8913 Check_First_Subtype (Arg1);
8914 Ent := Entity (Expression (Arg1));
8916 if not Is_Private_Type (Ent)
8917 and then not Is_Protected_Type (Ent)
8920 ("pragma % can only be applied to private or protected type",
8924 -- Give an error if the pragma is applied to a protected type that
8925 -- does not qualify (due to having entries, or due to components
8926 -- that do not qualify).
8928 if Is_Protected_Type (Ent)
8929 and then not Has_Preelaborable_Initialization (Ent)
8932 ("protected type & does not have preelaborable " &
8933 "initialization", Ent);
8935 -- Otherwise mark the type as definitely having preelaborable
8939 Set_Known_To_Have_Preelab_Init (Ent);
8942 if Has_Pragma_Preelab_Init (Ent)
8943 and then Warn_On_Redundant_Constructs
8945 Error_Pragma ("?duplicate pragma%!");
8947 Set_Has_Pragma_Preelab_Init (Ent);
8955 -- pragma Polling (ON | OFF);
8957 when Pragma_Polling =>
8959 Check_Arg_Count (1);
8960 Check_No_Identifiers;
8961 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
8962 Polling_Required := (Chars (Expression (Arg1)) = Name_On);
8964 --------------------
8965 -- Persistent_BSS --
8966 --------------------
8968 when Pragma_Persistent_BSS => Persistent_BSS : declare
8975 Check_At_Most_N_Arguments (1);
8977 -- Case of application to specific object (one argument)
8979 if Arg_Count = 1 then
8980 Check_Arg_Is_Library_Level_Local_Name (Arg1);
8982 if not Is_Entity_Name (Expression (Arg1))
8984 (Ekind (Entity (Expression (Arg1))) /= E_Variable
8985 and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
8987 Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
8990 Ent := Entity (Expression (Arg1));
8991 Decl := Parent (Ent);
8993 if Rep_Item_Too_Late (Ent, N) then
8997 if Present (Expression (Decl)) then
8999 ("object for pragma% cannot have initialization", Arg1);
9002 if not Is_Potentially_Persistent_Type (Etype (Ent)) then
9004 ("object type for pragma% is not potentially persistent",
9009 Make_Linker_Section_Pragma
9010 (Ent, Sloc (N), ".persistent.bss");
9011 Insert_After (N, Prag);
9014 -- Case of use as configuration pragma with no arguments
9017 Check_Valid_Configuration_Pragma;
9018 Persistent_BSS_Mode := True;
9026 -- pragma Preelaborate [(library_unit_NAME)];
9028 -- Set the flag Is_Preelaborated of program unit name entity
9030 when Pragma_Preelaborate => Preelaborate : declare
9031 Pa : constant Node_Id := Parent (N);
9032 Pk : constant Node_Kind := Nkind (Pa);
9036 Check_Ada_83_Warning;
9037 Check_Valid_Library_Unit_Pragma;
9039 if Nkind (N) = N_Null_Statement then
9043 Ent := Find_Lib_Unit_Name;
9045 -- This filters out pragmas inside generic parent then
9046 -- show up inside instantiation
9049 and then not (Pk = N_Package_Specification
9050 and then Present (Generic_Parent (Pa)))
9052 if not Debug_Flag_U then
9053 Set_Is_Preelaborated (Ent);
9054 Set_Suppress_Elaboration_Warnings (Ent);
9059 ---------------------
9060 -- Preelaborate_05 --
9061 ---------------------
9063 -- pragma Preelaborate_05 [(library_unit_NAME)];
9065 -- This pragma is useable only in GNAT_Mode, where it is used like
9066 -- pragma Preelaborate but it is only effective in Ada 2005 mode
9067 -- (otherwise it is ignored). This is used to implement AI-362 which
9068 -- recategorizes some run-time packages in Ada 2005 mode.
9070 when Pragma_Preelaborate_05 => Preelaborate_05 : declare
9075 Check_Valid_Library_Unit_Pragma;
9077 if not GNAT_Mode then
9078 Error_Pragma ("pragma% only available in GNAT mode");
9081 if Nkind (N) = N_Null_Statement then
9085 -- This is one of the few cases where we need to test the value of
9086 -- Ada_Version_Explicit rather than Ada_Version (which is always
9087 -- set to Ada_05 in a predefined unit), we need to know the
9088 -- explicit version set to know if this pragma is active.
9090 if Ada_Version_Explicit >= Ada_05 then
9091 Ent := Find_Lib_Unit_Name;
9092 Set_Is_Preelaborated (Ent);
9093 Set_Suppress_Elaboration_Warnings (Ent);
9095 end Preelaborate_05;
9101 -- pragma Priority (EXPRESSION);
9103 when Pragma_Priority => Priority : declare
9104 P : constant Node_Id := Parent (N);
9108 Check_No_Identifiers;
9109 Check_Arg_Count (1);
9113 if Nkind (P) = N_Subprogram_Body then
9114 Check_In_Main_Program;
9116 Arg := Expression (Arg1);
9117 Analyze_And_Resolve (Arg, Standard_Integer);
9121 if not Is_Static_Expression (Arg) then
9122 Flag_Non_Static_Expr
9123 ("main subprogram priority is not static!", Arg);
9126 -- If constraint error, then we already signalled an error
9128 elsif Raises_Constraint_Error (Arg) then
9131 -- Otherwise check in range
9135 Val : constant Uint := Expr_Value (Arg);
9139 or else Val > Expr_Value (Expression
9140 (Parent (RTE (RE_Max_Priority))))
9143 ("main subprogram priority is out of range", Arg1);
9149 (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
9151 -- Load an arbitrary entity from System.Tasking to make sure
9152 -- this package is implicitly with'ed, since we need to have
9153 -- the tasking run-time active for the pragma Priority to have
9157 Discard : Entity_Id;
9158 pragma Warnings (Off, Discard);
9160 Discard := RTE (RE_Task_List);
9163 -- Task or Protected, must be of type Integer
9165 elsif Nkind (P) = N_Protected_Definition
9167 Nkind (P) = N_Task_Definition
9169 Arg := Expression (Arg1);
9171 -- The expression must be analyzed in the special manner
9172 -- described in "Handling of Default and Per-Object
9173 -- Expressions" in sem.ads.
9175 Analyze_Per_Use_Expression (Arg, Standard_Integer);
9177 if not Is_Static_Expression (Arg) then
9178 Check_Restriction (Static_Priorities, Arg);
9181 -- Anything else is incorrect
9187 if Has_Priority_Pragma (P) then
9188 Error_Pragma ("duplicate pragma% not allowed");
9190 Set_Has_Priority_Pragma (P, True);
9192 if Nkind (P) = N_Protected_Definition
9194 Nkind (P) = N_Task_Definition
9196 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
9197 -- exp_ch9 should use this ???
9202 -----------------------------------
9203 -- Priority_Specific_Dispatching --
9204 -----------------------------------
9206 -- pragma Priority_Specific_Dispatching (
9207 -- policy_IDENTIFIER,
9208 -- first_priority_EXPRESSION,
9209 -- last_priority_EXPRESSION);
9211 when Pragma_Priority_Specific_Dispatching =>
9212 Priority_Specific_Dispatching : declare
9213 Prio_Id : constant Entity_Id := RTE (RE_Any_Priority);
9214 -- This is the entity System.Any_Priority;
9217 Lower_Bound : Node_Id;
9218 Upper_Bound : Node_Id;
9224 Check_Arg_Count (3);
9225 Check_No_Identifiers;
9226 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
9227 Check_Valid_Configuration_Pragma;
9228 Get_Name_String (Chars (Expression (Arg1)));
9229 DP := Fold_Upper (Name_Buffer (1));
9231 Lower_Bound := Expression (Arg2);
9232 Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer);
9233 Lower_Val := Expr_Value (Lower_Bound);
9235 Upper_Bound := Expression (Arg3);
9236 Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer);
9237 Upper_Val := Expr_Value (Upper_Bound);
9239 -- It is not allowed to use Task_Dispatching_Policy and
9240 -- Priority_Specific_Dispatching in the same partition.
9242 if Task_Dispatching_Policy /= ' ' then
9243 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9245 ("pragma% incompatible with Task_Dispatching_Policy#");
9247 -- Check lower bound in range
9249 elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9251 Lower_Val > Expr_Value (Type_High_Bound (Prio_Id))
9254 ("first_priority is out of range", Arg2);
9256 -- Check upper bound in range
9258 elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id))
9260 Upper_Val > Expr_Value (Type_High_Bound (Prio_Id))
9263 ("last_priority is out of range", Arg3);
9265 -- Check that the priority range is valid
9267 elsif Lower_Val > Upper_Val then
9269 ("last_priority_expression must be greater than" &
9270 " or equal to first_priority_expression");
9272 -- Store the new policy, but always preserve System_Location since
9273 -- we like the error message with the run-time name.
9276 -- Check overlapping in the priority ranges specified in other
9277 -- Priority_Specific_Dispatching pragmas within the same
9278 -- partition. We can only check those we know about!
9281 Specific_Dispatching.First .. Specific_Dispatching.Last
9283 if Specific_Dispatching.Table (J).First_Priority in
9284 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9285 or else Specific_Dispatching.Table (J).Last_Priority in
9286 UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val)
9289 Specific_Dispatching.Table (J).Pragma_Loc;
9291 ("priority range overlaps with "
9292 & "Priority_Specific_Dispatching#");
9296 -- The use of Priority_Specific_Dispatching is incompatible
9297 -- with Task_Dispatching_Policy.
9299 if Task_Dispatching_Policy /= ' ' then
9300 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
9302 ("Priority_Specific_Dispatching incompatible "
9303 & "with Task_Dispatching_Policy#");
9306 -- The use of Priority_Specific_Dispatching forces ceiling
9309 if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then
9310 Error_Msg_Sloc := Locking_Policy_Sloc;
9312 ("Priority_Specific_Dispatching incompatible "
9313 & "with Locking_Policy#");
9315 -- Set the Ceiling_Locking policy, but preserve System_Location
9316 -- since we like the error message with the run time name.
9319 Locking_Policy := 'C';
9321 if Locking_Policy_Sloc /= System_Location then
9322 Locking_Policy_Sloc := Loc;
9326 -- Add entry in the table
9328 Specific_Dispatching.Append
9329 ((Dispatching_Policy => DP,
9330 First_Priority => UI_To_Int (Lower_Val),
9331 Last_Priority => UI_To_Int (Upper_Val),
9332 Pragma_Loc => Loc));
9334 end Priority_Specific_Dispatching;
9340 -- pragma Profile (profile_IDENTIFIER);
9342 -- profile_IDENTIFIER => Protected | Ravenscar
9344 when Pragma_Profile =>
9346 Check_Arg_Count (1);
9347 Check_Valid_Configuration_Pragma;
9348 Check_No_Identifiers;
9351 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9353 if Chars (Argx) = Name_Ravenscar then
9354 Set_Ravenscar_Profile (N);
9355 elsif Chars (Argx) = Name_Restricted then
9356 Set_Profile_Restrictions (Restricted, N, Warn => False);
9358 Error_Pragma_Arg ("& is not a valid profile", Argx);
9362 ----------------------
9363 -- Profile_Warnings --
9364 ----------------------
9366 -- pragma Profile_Warnings (profile_IDENTIFIER);
9368 -- profile_IDENTIFIER => Protected | Ravenscar
9370 when Pragma_Profile_Warnings =>
9372 Check_Arg_Count (1);
9373 Check_Valid_Configuration_Pragma;
9374 Check_No_Identifiers;
9377 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
9379 if Chars (Argx) = Name_Ravenscar then
9380 Set_Profile_Restrictions (Ravenscar, N, Warn => True);
9381 elsif Chars (Argx) = Name_Restricted then
9382 Set_Profile_Restrictions (Restricted, N, Warn => True);
9384 Error_Pragma_Arg ("& is not a valid profile", Argx);
9388 --------------------------
9389 -- Propagate_Exceptions --
9390 --------------------------
9392 -- pragma Propagate_Exceptions;
9394 -- Note: this pragma is obsolete and has no effect
9396 when Pragma_Propagate_Exceptions =>
9398 Check_Arg_Count (0);
9400 if In_Extended_Main_Source_Unit (N) then
9401 Propagate_Exceptions := True;
9408 -- pragma Psect_Object (
9409 -- [Internal =>] LOCAL_NAME,
9410 -- [, [External =>] EXTERNAL_SYMBOL]
9411 -- [, [Size =>] EXTERNAL_SYMBOL]);
9413 when Pragma_Psect_Object | Pragma_Common_Object =>
9414 Psect_Object : declare
9415 Args : Args_List (1 .. 3);
9416 Names : constant Name_List (1 .. 3) := (
9421 Internal : Node_Id renames Args (1);
9422 External : Node_Id renames Args (2);
9423 Size : Node_Id renames Args (3);
9427 procedure Check_Too_Long (Arg : Node_Id);
9428 -- Posts message if the argument is an identifier with more
9429 -- than 31 characters, or a string literal with more than
9430 -- 31 characters, and we are operating under VMS
9432 --------------------
9433 -- Check_Too_Long --
9434 --------------------
9436 procedure Check_Too_Long (Arg : Node_Id) is
9437 X : constant Node_Id := Original_Node (Arg);
9440 if Nkind (X) /= N_String_Literal
9442 Nkind (X) /= N_Identifier
9445 ("inappropriate argument for pragma %", Arg);
9448 if OpenVMS_On_Target then
9449 if (Nkind (X) = N_String_Literal
9450 and then String_Length (Strval (X)) > 31)
9452 (Nkind (X) = N_Identifier
9453 and then Length_Of_Name (Chars (X)) > 31)
9456 ("argument for pragma % is longer than 31 characters",
9462 -- Start of processing for Common_Object/Psect_Object
9466 Gather_Associations (Names, Args);
9467 Process_Extended_Import_Export_Internal_Arg (Internal);
9469 Def_Id := Entity (Internal);
9471 if Ekind (Def_Id) /= E_Constant
9472 and then Ekind (Def_Id) /= E_Variable
9475 ("pragma% must designate an object", Internal);
9478 Check_Too_Long (Internal);
9480 if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
9482 ("cannot use pragma% for imported/exported object",
9486 if Is_Concurrent_Type (Etype (Internal)) then
9488 ("cannot specify pragma % for task/protected object",
9492 if Has_Rep_Pragma (Def_Id, Name_Common_Object)
9494 Has_Rep_Pragma (Def_Id, Name_Psect_Object)
9496 Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
9499 if Ekind (Def_Id) = E_Constant then
9501 ("cannot specify pragma % for a constant", Internal);
9504 if Is_Record_Type (Etype (Internal)) then
9510 Ent := First_Entity (Etype (Internal));
9511 while Present (Ent) loop
9512 Decl := Declaration_Node (Ent);
9514 if Ekind (Ent) = E_Component
9515 and then Nkind (Decl) = N_Component_Declaration
9516 and then Present (Expression (Decl))
9517 and then Warn_On_Export_Import
9520 ("?object for pragma % has defaults", Internal);
9530 if Present (Size) then
9531 Check_Too_Long (Size);
9534 if Present (External) then
9535 Check_Arg_Is_External_Name (External);
9536 Check_Too_Long (External);
9539 -- If all error tests pass, link pragma on to the rep item chain
9541 Record_Rep_Item (Def_Id, N);
9548 -- pragma Pure [(library_unit_NAME)];
9550 when Pragma_Pure => Pure : declare
9554 Check_Ada_83_Warning;
9555 Check_Valid_Library_Unit_Pragma;
9557 if Nkind (N) = N_Null_Statement then
9561 Ent := Find_Lib_Unit_Name;
9563 Set_Has_Pragma_Pure (Ent);
9564 Set_Suppress_Elaboration_Warnings (Ent);
9571 -- pragma Pure_05 [(library_unit_NAME)];
9573 -- This pragma is useable only in GNAT_Mode, where it is used like
9574 -- pragma Pure but it is only effective in Ada 2005 mode (otherwise
9575 -- it is ignored). It may be used after a pragma Preelaborate, in
9576 -- which case it overrides the effect of the pragma Preelaborate.
9577 -- This is used to implement AI-362 which recategorizes some run-time
9578 -- packages in Ada 2005 mode.
9580 when Pragma_Pure_05 => Pure_05 : declare
9585 Check_Valid_Library_Unit_Pragma;
9587 if not GNAT_Mode then
9588 Error_Pragma ("pragma% only available in GNAT mode");
9590 if Nkind (N) = N_Null_Statement then
9594 -- This is one of the few cases where we need to test the value of
9595 -- Ada_Version_Explicit rather than Ada_Version (which is always
9596 -- set to Ada_05 in a predefined unit), we need to know the
9597 -- explicit version set to know if this pragma is active.
9599 if Ada_Version_Explicit >= Ada_05 then
9600 Ent := Find_Lib_Unit_Name;
9601 Set_Is_Preelaborated (Ent, False);
9603 Set_Suppress_Elaboration_Warnings (Ent);
9611 -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
9613 when Pragma_Pure_Function => Pure_Function : declare
9617 Effective : Boolean := False;
9621 Check_Arg_Count (1);
9622 Check_Optional_Identifier (Arg1, Name_Entity);
9623 Check_Arg_Is_Local_Name (Arg1);
9624 E_Id := Expression (Arg1);
9626 if Error_Posted (E_Id) then
9630 -- Loop through homonyms (overloadings) of referenced entity
9636 Def_Id := Get_Base_Subprogram (E);
9638 if Ekind (Def_Id) /= E_Function
9639 and then Ekind (Def_Id) /= E_Generic_Function
9640 and then Ekind (Def_Id) /= E_Operator
9643 ("pragma% requires a function name", Arg1);
9646 Set_Is_Pure (Def_Id);
9648 if not Has_Pragma_Pure_Function (Def_Id) then
9649 Set_Has_Pragma_Pure_Function (Def_Id);
9654 exit when No (E) or else Scope (E) /= Current_Scope;
9658 and then Warn_On_Redundant_Constructs
9660 Error_Msg_NE ("pragma Pure_Function on& is redundant?",
9666 --------------------
9667 -- Queuing_Policy --
9668 --------------------
9670 -- pragma Queuing_Policy (policy_IDENTIFIER);
9672 when Pragma_Queuing_Policy => declare
9676 Check_Ada_83_Warning;
9677 Check_Arg_Count (1);
9678 Check_No_Identifiers;
9679 Check_Arg_Is_Queuing_Policy (Arg1);
9680 Check_Valid_Configuration_Pragma;
9681 Get_Name_String (Chars (Expression (Arg1)));
9682 QP := Fold_Upper (Name_Buffer (1));
9684 if Queuing_Policy /= ' '
9685 and then Queuing_Policy /= QP
9687 Error_Msg_Sloc := Queuing_Policy_Sloc;
9688 Error_Pragma ("queuing policy incompatible with policy#");
9690 -- Set new policy, but always preserve System_Location since
9691 -- we like the error message with the run time name.
9694 Queuing_Policy := QP;
9696 if Queuing_Policy_Sloc /= System_Location then
9697 Queuing_Policy_Sloc := Loc;
9702 ---------------------------
9703 -- Remote_Call_Interface --
9704 ---------------------------
9706 -- pragma Remote_Call_Interface [(library_unit_NAME)];
9708 when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
9709 Cunit_Node : Node_Id;
9710 Cunit_Ent : Entity_Id;
9714 Check_Ada_83_Warning;
9715 Check_Valid_Library_Unit_Pragma;
9717 if Nkind (N) = N_Null_Statement then
9721 Cunit_Node := Cunit (Current_Sem_Unit);
9722 K := Nkind (Unit (Cunit_Node));
9723 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
9725 if K = N_Package_Declaration
9726 or else K = N_Generic_Package_Declaration
9727 or else K = N_Subprogram_Declaration
9728 or else K = N_Generic_Subprogram_Declaration
9729 or else (K = N_Subprogram_Body
9730 and then Acts_As_Spec (Unit (Cunit_Node)))
9735 "pragma% must apply to package or subprogram declaration");
9738 Set_Is_Remote_Call_Interface (Cunit_Ent);
9739 end Remote_Call_Interface;
9745 -- pragma Remote_Types [(library_unit_NAME)];
9747 when Pragma_Remote_Types => Remote_Types : declare
9748 Cunit_Node : Node_Id;
9749 Cunit_Ent : Entity_Id;
9752 Check_Ada_83_Warning;
9753 Check_Valid_Library_Unit_Pragma;
9755 if Nkind (N) = N_Null_Statement then
9759 Cunit_Node := Cunit (Current_Sem_Unit);
9760 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
9762 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
9764 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
9767 "pragma% can only apply to a package declaration");
9770 Set_Is_Remote_Types (Cunit_Ent);
9777 -- pragma Ravenscar;
9779 when Pragma_Ravenscar =>
9781 Check_Arg_Count (0);
9782 Check_Valid_Configuration_Pragma;
9783 Set_Ravenscar_Profile (N);
9785 if Warn_On_Obsolescent_Feature then
9787 ("pragma Ravenscar is an obsolescent feature?", N);
9789 ("|use pragma Profile (Ravenscar) instead", N);
9792 -------------------------
9793 -- Restricted_Run_Time --
9794 -------------------------
9796 -- pragma Restricted_Run_Time;
9798 when Pragma_Restricted_Run_Time =>
9800 Check_Arg_Count (0);
9801 Check_Valid_Configuration_Pragma;
9802 Set_Profile_Restrictions (Restricted, N, Warn => False);
9804 if Warn_On_Obsolescent_Feature then
9806 ("pragma Restricted_Run_Time is an obsolescent feature?", N);
9808 ("|use pragma Profile (Restricted) instead", N);
9815 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
9818 -- restriction_IDENTIFIER
9819 -- | restriction_parameter_IDENTIFIER => EXPRESSION
9821 when Pragma_Restrictions =>
9822 Process_Restrictions_Or_Restriction_Warnings (Warn => False);
9824 --------------------------
9825 -- Restriction_Warnings --
9826 --------------------------
9828 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
9831 -- restriction_IDENTIFIER
9832 -- | restriction_parameter_IDENTIFIER => EXPRESSION
9834 when Pragma_Restriction_Warnings =>
9835 Process_Restrictions_Or_Restriction_Warnings (Warn => True);
9841 -- pragma Reviewable;
9843 when Pragma_Reviewable =>
9844 Check_Ada_83_Warning;
9845 Check_Arg_Count (0);
9852 -- pragma Share_Generic (NAME {, NAME});
9854 when Pragma_Share_Generic =>
9856 Process_Generic_List;
9862 -- pragma Shared (LOCAL_NAME);
9864 when Pragma_Shared =>
9866 Process_Atomic_Shared_Volatile;
9868 --------------------
9869 -- Shared_Passive --
9870 --------------------
9872 -- pragma Shared_Passive [(library_unit_NAME)];
9874 -- Set the flag Is_Shared_Passive of program unit name entity
9876 when Pragma_Shared_Passive => Shared_Passive : declare
9877 Cunit_Node : Node_Id;
9878 Cunit_Ent : Entity_Id;
9881 Check_Ada_83_Warning;
9882 Check_Valid_Library_Unit_Pragma;
9884 if Nkind (N) = N_Null_Statement then
9888 Cunit_Node := Cunit (Current_Sem_Unit);
9889 Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
9891 if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
9893 Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
9896 "pragma% can only apply to a package declaration");
9899 Set_Is_Shared_Passive (Cunit_Ent);
9902 ----------------------
9903 -- Source_File_Name --
9904 ----------------------
9906 -- There are five forms for this pragma:
9908 -- pragma Source_File_Name (
9909 -- [UNIT_NAME =>] unit_NAME,
9910 -- BODY_FILE_NAME => STRING_LITERAL
9911 -- [, [INDEX =>] INTEGER_LITERAL]);
9913 -- pragma Source_File_Name (
9914 -- [UNIT_NAME =>] unit_NAME,
9915 -- SPEC_FILE_NAME => STRING_LITERAL
9916 -- [, [INDEX =>] INTEGER_LITERAL]);
9918 -- pragma Source_File_Name (
9919 -- BODY_FILE_NAME => STRING_LITERAL
9920 -- [, DOT_REPLACEMENT => STRING_LITERAL]
9921 -- [, CASING => CASING_SPEC]);
9923 -- pragma Source_File_Name (
9924 -- SPEC_FILE_NAME => STRING_LITERAL
9925 -- [, DOT_REPLACEMENT => STRING_LITERAL]
9926 -- [, CASING => CASING_SPEC]);
9928 -- pragma Source_File_Name (
9929 -- SUBUNIT_FILE_NAME => STRING_LITERAL
9930 -- [, DOT_REPLACEMENT => STRING_LITERAL]
9931 -- [, CASING => CASING_SPEC]);
9933 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
9935 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
9936 -- Source_File_Name (SFN), however their usage is exclusive:
9937 -- SFN can only be used when no project file is used, while
9938 -- SFNP can only be used when a project file is used.
9940 -- No processing here. Processing was completed during parsing,
9941 -- since we need to have file names set as early as possible.
9942 -- Units are loaded well before semantic processing starts.
9944 -- The only processing we defer to this point is the check
9945 -- for correct placement.
9947 when Pragma_Source_File_Name =>
9949 Check_Valid_Configuration_Pragma;
9951 ------------------------------
9952 -- Source_File_Name_Project --
9953 ------------------------------
9955 -- See Source_File_Name for syntax
9957 -- No processing here. Processing was completed during parsing,
9958 -- since we need to have file names set as early as possible.
9959 -- Units are loaded well before semantic processing starts.
9961 -- The only processing we defer to this point is the check
9962 -- for correct placement.
9964 when Pragma_Source_File_Name_Project =>
9966 Check_Valid_Configuration_Pragma;
9968 -- Check that a pragma Source_File_Name_Project is used only
9969 -- in a configuration pragmas file.
9971 -- Pragmas Source_File_Name_Project should only be generated
9972 -- by the Project Manager in configuration pragmas files.
9974 -- This is really an ugly test. It seems to depend on some
9975 -- accidental and undocumented property. At the very least
9976 -- it needs to be documented, but it would be better to have
9977 -- a clean way of testing if we are in a configuration file???
9979 if Present (Parent (N)) then
9981 ("pragma% can only appear in a configuration pragmas file");
9984 ----------------------
9985 -- Source_Reference --
9986 ----------------------
9988 -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
9990 -- Nothing to do, all processing completed in Par.Prag, since we
9991 -- need the information for possible parser messages that are output
9993 when Pragma_Source_Reference =>
9996 --------------------------------
9997 -- Static_Elaboration_Desired --
9998 --------------------------------
10000 -- pragma Static_Elaboration_Desired (DIRECT_NAME);
10002 when Pragma_Static_Elaboration_Desired =>
10004 Check_At_Most_N_Arguments (1);
10006 if Is_Compilation_Unit (Current_Scope)
10007 and then Ekind (Current_Scope) = E_Package
10009 Set_Static_Elaboration_Desired (Current_Scope, True);
10011 Error_Pragma ("pragma% must apply to a library-level package");
10018 -- pragma Storage_Size (EXPRESSION);
10020 when Pragma_Storage_Size => Storage_Size : declare
10021 P : constant Node_Id := Parent (N);
10025 Check_No_Identifiers;
10026 Check_Arg_Count (1);
10028 -- The expression must be analyzed in the special manner
10029 -- described in "Handling of Default Expressions" in sem.ads.
10031 -- Set In_Default_Expression for per-object case ???
10033 Arg := Expression (Arg1);
10034 Analyze_Per_Use_Expression (Arg, Any_Integer);
10036 if not Is_Static_Expression (Arg) then
10037 Check_Restriction (Static_Storage_Size, Arg);
10040 if Nkind (P) /= N_Task_Definition then
10045 if Has_Storage_Size_Pragma (P) then
10046 Error_Pragma ("duplicate pragma% not allowed");
10048 Set_Has_Storage_Size_Pragma (P, True);
10051 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10052 -- ??? exp_ch9 should use this!
10060 -- pragma Storage_Unit (NUMERIC_LITERAL);
10062 -- Only permitted argument is System'Storage_Unit value
10064 when Pragma_Storage_Unit =>
10065 Check_No_Identifiers;
10066 Check_Arg_Count (1);
10067 Check_Arg_Is_Integer_Literal (Arg1);
10069 if Intval (Expression (Arg1)) /=
10070 UI_From_Int (Ttypes.System_Storage_Unit)
10072 Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
10074 ("the only allowed argument for pragma% is ^", Arg1);
10077 --------------------
10078 -- Stream_Convert --
10079 --------------------
10081 -- pragma Stream_Convert (
10082 -- [Entity =>] type_LOCAL_NAME,
10083 -- [Read =>] function_NAME,
10084 -- [Write =>] function NAME);
10086 when Pragma_Stream_Convert => Stream_Convert : declare
10088 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
10089 -- Check that the given argument is the name of a local
10090 -- function of one argument that is not overloaded earlier
10091 -- in the current local scope. A check is also made that the
10092 -- argument is a function with one parameter.
10094 --------------------------------------
10095 -- Check_OK_Stream_Convert_Function --
10096 --------------------------------------
10098 procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
10102 Check_Arg_Is_Local_Name (Arg);
10103 Ent := Entity (Expression (Arg));
10105 if Has_Homonym (Ent) then
10107 ("argument for pragma% may not be overloaded", Arg);
10110 if Ekind (Ent) /= E_Function
10111 or else No (First_Formal (Ent))
10112 or else Present (Next_Formal (First_Formal (Ent)))
10115 ("argument for pragma% must be" &
10116 " function of one argument", Arg);
10118 end Check_OK_Stream_Convert_Function;
10120 -- Start of procecessing for Stream_Convert
10124 Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
10125 Check_Arg_Count (3);
10126 Check_Optional_Identifier (Arg1, Name_Entity);
10127 Check_Optional_Identifier (Arg2, Name_Read);
10128 Check_Optional_Identifier (Arg3, Name_Write);
10129 Check_Arg_Is_Local_Name (Arg1);
10130 Check_OK_Stream_Convert_Function (Arg2);
10131 Check_OK_Stream_Convert_Function (Arg3);
10134 Typ : constant Entity_Id :=
10135 Underlying_Type (Entity (Expression (Arg1)));
10136 Read : constant Entity_Id := Entity (Expression (Arg2));
10137 Write : constant Entity_Id := Entity (Expression (Arg3));
10140 if Etype (Typ) = Any_Type
10142 Etype (Read) = Any_Type
10144 Etype (Write) = Any_Type
10149 Check_First_Subtype (Arg1);
10151 if Rep_Item_Too_Early (Typ, N)
10153 Rep_Item_Too_Late (Typ, N)
10158 if Underlying_Type (Etype (Read)) /= Typ then
10160 ("incorrect return type for function&", Arg2);
10163 if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
10165 ("incorrect parameter type for function&", Arg3);
10168 if Underlying_Type (Etype (First_Formal (Read))) /=
10169 Underlying_Type (Etype (Write))
10172 ("result type of & does not match Read parameter type",
10176 end Stream_Convert;
10178 -------------------------
10179 -- Style_Checks (GNAT) --
10180 -------------------------
10182 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
10184 -- This is processed by the parser since some of the style
10185 -- checks take place during source scanning and parsing. This
10186 -- means that we don't need to issue error messages here.
10188 when Pragma_Style_Checks => Style_Checks : declare
10189 A : constant Node_Id := Expression (Arg1);
10195 Check_No_Identifiers;
10197 -- Two argument form
10199 if Arg_Count = 2 then
10200 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
10207 E_Id := Expression (Arg2);
10210 if not Is_Entity_Name (E_Id) then
10212 ("second argument of pragma% must be entity name",
10216 E := Entity (E_Id);
10222 Set_Suppress_Style_Checks (E,
10223 (Chars (Expression (Arg1)) = Name_Off));
10224 exit when No (Homonym (E));
10230 -- One argument form
10233 Check_Arg_Count (1);
10235 if Nkind (A) = N_String_Literal then
10239 Slen : constant Natural := Natural (String_Length (S));
10240 Options : String (1 .. Slen);
10246 C := Get_String_Char (S, Int (J));
10247 exit when not In_Character_Range (C);
10248 Options (J) := Get_Character (C);
10250 -- If at end of string, set options. As per discussion
10251 -- above, no need to check for errors, since we issued
10252 -- them in the parser.
10255 Set_Style_Check_Options (Options);
10263 elsif Nkind (A) = N_Identifier then
10264 if Chars (A) = Name_All_Checks then
10265 Set_Default_Style_Check_Options;
10267 elsif Chars (A) = Name_On then
10268 Style_Check := True;
10270 elsif Chars (A) = Name_Off then
10271 Style_Check := False;
10281 -- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
10283 when Pragma_Subtitle =>
10285 Check_Arg_Count (1);
10286 Check_Optional_Identifier (Arg1, Name_Subtitle);
10287 Check_Arg_Is_String_Literal (Arg1);
10293 -- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
10295 when Pragma_Suppress =>
10296 Process_Suppress_Unsuppress (True);
10302 -- pragma Suppress_All;
10304 -- The only check made here is that the pragma appears in the
10305 -- proper place, i.e. following a compilation unit. If indeed
10306 -- it appears in this context, then the parser has already
10307 -- inserted an equivalent pragma Suppress (All_Checks) to get
10308 -- the required effect.
10310 when Pragma_Suppress_All =>
10312 Check_Arg_Count (0);
10314 if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
10315 or else not Is_List_Member (N)
10316 or else List_Containing (N) /= Pragmas_After (Parent (N))
10319 ("misplaced pragma%, must follow compilation unit");
10322 -------------------------
10323 -- Suppress_Debug_Info --
10324 -------------------------
10326 -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
10328 when Pragma_Suppress_Debug_Info =>
10330 Check_Arg_Count (1);
10331 Check_Optional_Identifier (Arg1, Name_Entity);
10332 Check_Arg_Is_Local_Name (Arg1);
10333 Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
10335 ----------------------------------
10336 -- Suppress_Exception_Locations --
10337 ----------------------------------
10339 -- pragma Suppress_Exception_Locations;
10341 when Pragma_Suppress_Exception_Locations =>
10343 Check_Arg_Count (0);
10344 Check_Valid_Configuration_Pragma;
10345 Exception_Locations_Suppressed := True;
10347 -----------------------------
10348 -- Suppress_Initialization --
10349 -----------------------------
10351 -- pragma Suppress_Initialization ([Entity =>] type_Name);
10353 when Pragma_Suppress_Initialization => Suppress_Init : declare
10359 Check_Arg_Count (1);
10360 Check_Optional_Identifier (Arg1, Name_Entity);
10361 Check_Arg_Is_Local_Name (Arg1);
10363 E_Id := Expression (Arg1);
10365 if Etype (E_Id) = Any_Type then
10369 E := Entity (E_Id);
10371 if Is_Type (E) then
10372 if Is_Incomplete_Or_Private_Type (E) then
10373 if No (Full_View (Base_Type (E))) then
10375 ("argument of pragma% cannot be an incomplete type",
10378 Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
10381 Set_Suppress_Init_Proc (Base_Type (E));
10386 ("pragma% requires argument that is a type name", Arg1);
10394 -- pragma System_Name (DIRECT_NAME);
10396 -- Syntax check: one argument, which must be the identifier GNAT
10397 -- or the identifier GCC, no other identifiers are acceptable.
10399 when Pragma_System_Name =>
10400 Check_No_Identifiers;
10401 Check_Arg_Count (1);
10402 Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
10404 -----------------------------
10405 -- Task_Dispatching_Policy --
10406 -----------------------------
10408 -- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
10410 when Pragma_Task_Dispatching_Policy => declare
10414 Check_Ada_83_Warning;
10415 Check_Arg_Count (1);
10416 Check_No_Identifiers;
10417 Check_Arg_Is_Task_Dispatching_Policy (Arg1);
10418 Check_Valid_Configuration_Pragma;
10419 Get_Name_String (Chars (Expression (Arg1)));
10420 DP := Fold_Upper (Name_Buffer (1));
10422 if Task_Dispatching_Policy /= ' '
10423 and then Task_Dispatching_Policy /= DP
10425 Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
10427 ("task dispatching policy incompatible with policy#");
10429 -- Set new policy, but always preserve System_Location since
10430 -- we like the error message with the run time name.
10433 Task_Dispatching_Policy := DP;
10435 if Task_Dispatching_Policy_Sloc /= System_Location then
10436 Task_Dispatching_Policy_Sloc := Loc;
10445 -- pragma Task_Info (EXPRESSION);
10447 when Pragma_Task_Info => Task_Info : declare
10448 P : constant Node_Id := Parent (N);
10453 if Nkind (P) /= N_Task_Definition then
10454 Error_Pragma ("pragma% must appear in task definition");
10457 Check_No_Identifiers;
10458 Check_Arg_Count (1);
10460 Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
10462 if Etype (Expression (Arg1)) = Any_Type then
10466 if Has_Task_Info_Pragma (P) then
10467 Error_Pragma ("duplicate pragma% not allowed");
10469 Set_Has_Task_Info_Pragma (P, True);
10477 -- pragma Task_Name (string_EXPRESSION);
10479 when Pragma_Task_Name => Task_Name : declare
10480 -- pragma Priority (EXPRESSION);
10482 P : constant Node_Id := Parent (N);
10486 Check_No_Identifiers;
10487 Check_Arg_Count (1);
10489 Arg := Expression (Arg1);
10490 Analyze_And_Resolve (Arg, Standard_String);
10492 if Nkind (P) /= N_Task_Definition then
10496 if Has_Task_Name_Pragma (P) then
10497 Error_Pragma ("duplicate pragma% not allowed");
10499 Set_Has_Task_Name_Pragma (P, True);
10500 Record_Rep_Item (Defining_Identifier (Parent (P)), N);
10508 -- pragma Task_Storage (
10509 -- [Task_Type =>] LOCAL_NAME,
10510 -- [Top_Guard =>] static_integer_EXPRESSION);
10512 when Pragma_Task_Storage => Task_Storage : declare
10513 Args : Args_List (1 .. 2);
10514 Names : constant Name_List (1 .. 2) := (
10518 Task_Type : Node_Id renames Args (1);
10519 Top_Guard : Node_Id renames Args (2);
10525 Gather_Associations (Names, Args);
10527 if No (Task_Type) then
10529 ("missing task_type argument for pragma%");
10532 Check_Arg_Is_Local_Name (Task_Type);
10534 Ent := Entity (Task_Type);
10536 if not Is_Task_Type (Ent) then
10538 ("argument for pragma% must be task type", Task_Type);
10541 if No (Top_Guard) then
10543 ("pragma% takes two arguments", Task_Type);
10545 Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
10548 Check_First_Subtype (Task_Type);
10550 if Rep_Item_Too_Late (Ent, N) then
10559 -- pragma Time_Slice (static_duration_EXPRESSION);
10561 when Pragma_Time_Slice => Time_Slice : declare
10567 Check_Arg_Count (1);
10568 Check_No_Identifiers;
10569 Check_In_Main_Program;
10570 Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
10572 if not Error_Posted (Arg1) then
10574 while Present (Nod) loop
10575 if Nkind (Nod) = N_Pragma
10576 and then Pragma_Name (Nod) = Name_Time_Slice
10578 Error_Msg_Name_1 := Pname;
10579 Error_Msg_N ("duplicate pragma% not permitted", Nod);
10586 -- Process only if in main unit
10588 if Get_Source_Unit (Loc) = Main_Unit then
10589 Opt.Time_Slice_Set := True;
10590 Val := Expr_Value_R (Expression (Arg1));
10592 if Val <= Ureal_0 then
10593 Opt.Time_Slice_Value := 0;
10595 elsif Val > UR_From_Uint (UI_From_Int (1000)) then
10596 Opt.Time_Slice_Value := 1_000_000_000;
10599 Opt.Time_Slice_Value :=
10600 UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
10609 -- pragma Title (TITLING_OPTION [, TITLING OPTION]);
10611 -- TITLING_OPTION ::=
10612 -- [Title =>] STRING_LITERAL
10613 -- | [Subtitle =>] STRING_LITERAL
10615 when Pragma_Title => Title : declare
10616 Args : Args_List (1 .. 2);
10617 Names : constant Name_List (1 .. 2) := (
10623 Gather_Associations (Names, Args);
10625 for J in 1 .. 2 loop
10626 if Present (Args (J)) then
10627 Check_Arg_Is_String_Literal (Args (J));
10632 ---------------------
10633 -- Unchecked_Union --
10634 ---------------------
10636 -- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
10638 when Pragma_Unchecked_Union => Unchecked_Union : declare
10639 Assoc : constant Node_Id := Arg1;
10640 Type_Id : constant Node_Id := Expression (Assoc);
10651 Check_No_Identifiers;
10652 Check_Arg_Count (1);
10653 Check_Arg_Is_Local_Name (Arg1);
10655 Find_Type (Type_Id);
10656 Typ := Entity (Type_Id);
10659 or else Rep_Item_Too_Early (Typ, N)
10663 Typ := Underlying_Type (Typ);
10666 if Rep_Item_Too_Late (Typ, N) then
10670 Check_First_Subtype (Arg1);
10672 -- Note remaining cases are references to a type in the current
10673 -- declarative part. If we find an error, we post the error on
10674 -- the relevant type declaration at an appropriate point.
10676 if not Is_Record_Type (Typ) then
10677 Error_Msg_N ("Unchecked_Union must be record type", Typ);
10680 elsif Is_Tagged_Type (Typ) then
10681 Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
10684 elsif Is_Limited_Type (Typ) then
10686 ("Unchecked_Union must not be limited record type", Typ);
10687 Explain_Limited_Type (Typ, Typ);
10691 if not Has_Discriminants (Typ) then
10693 ("Unchecked_Union must have one discriminant", Typ);
10697 Discr := First_Discriminant (Typ);
10698 while Present (Discr) loop
10699 if No (Discriminant_Default_Value (Discr)) then
10701 ("Unchecked_Union discriminant must have default value",
10704 Next_Discriminant (Discr);
10707 Tdef := Type_Definition (Declaration_Node (Typ));
10708 Clist := Component_List (Tdef);
10710 Comp := First (Component_Items (Clist));
10711 while Present (Comp) loop
10712 Check_Component (Comp);
10716 if No (Clist) or else No (Variant_Part (Clist)) then
10718 ("Unchecked_Union must have variant part",
10723 Vpart := Variant_Part (Clist);
10725 Variant := First (Variants (Vpart));
10726 while Present (Variant) loop
10727 Check_Variant (Variant);
10732 Set_Is_Unchecked_Union (Typ, True);
10733 Set_Convention (Typ, Convention_C);
10735 Set_Has_Unchecked_Union (Base_Type (Typ), True);
10736 Set_Is_Unchecked_Union (Base_Type (Typ), True);
10737 end Unchecked_Union;
10739 ------------------------
10740 -- Unimplemented_Unit --
10741 ------------------------
10743 -- pragma Unimplemented_Unit;
10745 -- Note: this only gives an error if we are generating code,
10746 -- or if we are in a generic library unit (where the pragma
10747 -- appears in the body, not in the spec).
10749 when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
10750 Cunitent : constant Entity_Id :=
10751 Cunit_Entity (Get_Source_Unit (Loc));
10752 Ent_Kind : constant Entity_Kind :=
10757 Check_Arg_Count (0);
10759 if Operating_Mode = Generate_Code
10760 or else Ent_Kind = E_Generic_Function
10761 or else Ent_Kind = E_Generic_Procedure
10762 or else Ent_Kind = E_Generic_Package
10764 Get_Name_String (Chars (Cunitent));
10765 Set_Casing (Mixed_Case);
10766 Write_Str (Name_Buffer (1 .. Name_Len));
10767 Write_Str (" is not supported in this configuration");
10769 raise Unrecoverable_Error;
10771 end Unimplemented_Unit;
10773 ------------------------
10774 -- Universal_Aliasing --
10775 ------------------------
10777 -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)];
10779 when Pragma_Universal_Aliasing => Universal_Alias : declare
10784 Check_Arg_Count (1);
10785 Check_Optional_Identifier (Arg2, Name_Entity);
10786 Check_Arg_Is_Local_Name (Arg1);
10787 E_Id := Entity (Expression (Arg1));
10789 if E_Id = Any_Type then
10791 elsif No (E_Id) or else not Is_Type (E_Id) then
10792 Error_Pragma_Arg ("pragma% requires type", Arg1);
10795 Set_Universal_Aliasing (Implementation_Base_Type (E_Id));
10796 end Universal_Alias;
10798 --------------------
10799 -- Universal_Data --
10800 --------------------
10802 -- pragma Universal_Data [(library_unit_NAME)];
10804 when Pragma_Universal_Data =>
10807 -- If this is a configuration pragma, then set the universal
10808 -- addressing option, otherwise confirm that the pragma
10809 -- satisfies the requirements of library unit pragma placement
10810 -- and leave it to the GNAAMP back end to detect the pragma
10811 -- (avoids transitive setting of the option due to withed units).
10813 if Is_Configuration_Pragma then
10814 Universal_Addressing_On_AAMP := True;
10816 Check_Valid_Library_Unit_Pragma;
10819 if not AAMP_On_Target then
10820 Error_Pragma ("?pragma% ignored (applies only to AAMP)");
10827 -- pragma Unmodified (local_Name {, local_Name});
10829 when Pragma_Unmodified => Unmodified : declare
10830 Arg_Node : Node_Id;
10831 Arg_Expr : Node_Id;
10832 Arg_Ent : Entity_Id;
10836 Check_At_Least_N_Arguments (1);
10838 -- Loop through arguments
10841 while Present (Arg_Node) loop
10842 Check_No_Identifier (Arg_Node);
10844 -- Note: the analyze call done by Check_Arg_Is_Local_Name
10845 -- will in fact generate reference, so that the entity will
10846 -- have a reference, which will inhibit any warnings about
10847 -- it not being referenced, and also properly show up in the
10848 -- ali file as a reference. But this reference is recorded
10849 -- before the Has_Pragma_Unreferenced flag is set, so that
10850 -- no warning is generated for this reference.
10852 Check_Arg_Is_Local_Name (Arg_Node);
10853 Arg_Expr := Get_Pragma_Arg (Arg_Node);
10855 if Is_Entity_Name (Arg_Expr) then
10856 Arg_Ent := Entity (Arg_Expr);
10858 if not Is_Assignable (Arg_Ent) then
10860 ("pragma% can only be applied to a variable",
10863 Set_Has_Pragma_Unmodified (Arg_Ent);
10875 -- pragma Unreferenced (local_Name {, local_Name});
10877 -- or when used in a context clause:
10879 -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME}
10881 when Pragma_Unreferenced => Unreferenced : declare
10882 Arg_Node : Node_Id;
10883 Arg_Expr : Node_Id;
10884 Arg_Ent : Entity_Id;
10889 Check_At_Least_N_Arguments (1);
10891 -- Check case of appearing within context clause
10893 if Is_In_Context_Clause then
10895 -- The arguments must all be units mentioned in a with clause
10896 -- in the same context clause. Note we already checked (in
10897 -- Par.Prag) that the arguments are either identifiers or
10898 -- selected components.
10901 while Present (Arg_Node) loop
10902 Citem := First (List_Containing (N));
10903 while Citem /= N loop
10904 if Nkind (Citem) = N_With_Clause
10905 and then Same_Name (Name (Citem), Expression (Arg_Node))
10907 Set_Has_Pragma_Unreferenced
10910 (Library_Unit (Citem))));
10911 Set_Unit_Name (Expression (Arg_Node), Name (Citem));
10920 ("argument of pragma% is not with'ed unit", Arg_Node);
10926 -- Case of not in list of context items
10930 while Present (Arg_Node) loop
10931 Check_No_Identifier (Arg_Node);
10933 -- Note: the analyze call done by Check_Arg_Is_Local_Name
10934 -- will in fact generate reference, so that the entity will
10935 -- have a reference, which will inhibit any warnings about
10936 -- it not being referenced, and also properly show up in the
10937 -- ali file as a reference. But this reference is recorded
10938 -- before the Has_Pragma_Unreferenced flag is set, so that
10939 -- no warning is generated for this reference.
10941 Check_Arg_Is_Local_Name (Arg_Node);
10942 Arg_Expr := Get_Pragma_Arg (Arg_Node);
10944 if Is_Entity_Name (Arg_Expr) then
10945 Arg_Ent := Entity (Arg_Expr);
10947 -- If the entity is overloaded, the pragma applies to the
10948 -- most recent overloading, as documented. In this case,
10949 -- name resolution does not generate a reference, so it
10950 -- must be done here explicitly.
10952 if Is_Overloaded (Arg_Expr) then
10953 Generate_Reference (Arg_Ent, N);
10956 Set_Has_Pragma_Unreferenced (Arg_Ent);
10964 --------------------------
10965 -- Unreferenced_Objects --
10966 --------------------------
10968 -- pragma Unreferenced_Objects (local_Name {, local_Name});
10970 when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare
10971 Arg_Node : Node_Id;
10972 Arg_Expr : Node_Id;
10976 Check_At_Least_N_Arguments (1);
10979 while Present (Arg_Node) loop
10980 Check_No_Identifier (Arg_Node);
10981 Check_Arg_Is_Local_Name (Arg_Node);
10982 Arg_Expr := Get_Pragma_Arg (Arg_Node);
10984 if not Is_Entity_Name (Arg_Expr)
10985 or else not Is_Type (Entity (Arg_Expr))
10988 ("argument for pragma% must be type or subtype", Arg_Node);
10991 Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr));
10994 end Unreferenced_Objects;
10996 ------------------------------
10997 -- Unreserve_All_Interrupts --
10998 ------------------------------
11000 -- pragma Unreserve_All_Interrupts;
11002 when Pragma_Unreserve_All_Interrupts =>
11004 Check_Arg_Count (0);
11006 if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
11007 Unreserve_All_Interrupts := True;
11014 -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
11016 when Pragma_Unsuppress =>
11018 Process_Suppress_Unsuppress (False);
11020 -------------------
11021 -- Use_VADS_Size --
11022 -------------------
11024 -- pragma Use_VADS_Size;
11026 when Pragma_Use_VADS_Size =>
11028 Check_Arg_Count (0);
11029 Check_Valid_Configuration_Pragma;
11030 Use_VADS_Size := True;
11032 ---------------------
11033 -- Validity_Checks --
11034 ---------------------
11036 -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
11038 when Pragma_Validity_Checks => Validity_Checks : declare
11039 A : constant Node_Id := Expression (Arg1);
11045 Check_Arg_Count (1);
11046 Check_No_Identifiers;
11048 if Nkind (A) = N_String_Literal then
11052 Slen : constant Natural := Natural (String_Length (S));
11053 Options : String (1 .. Slen);
11059 C := Get_String_Char (S, Int (J));
11060 exit when not In_Character_Range (C);
11061 Options (J) := Get_Character (C);
11064 Set_Validity_Check_Options (Options);
11072 elsif Nkind (A) = N_Identifier then
11074 if Chars (A) = Name_All_Checks then
11075 Set_Validity_Check_Options ("a");
11077 elsif Chars (A) = Name_On then
11078 Validity_Checks_On := True;
11080 elsif Chars (A) = Name_Off then
11081 Validity_Checks_On := False;
11085 end Validity_Checks;
11091 -- pragma Volatile (LOCAL_NAME);
11093 when Pragma_Volatile =>
11094 Process_Atomic_Shared_Volatile;
11096 -------------------------
11097 -- Volatile_Components --
11098 -------------------------
11100 -- pragma Volatile_Components (array_LOCAL_NAME);
11102 -- Volatile is handled by the same circuit as Atomic_Components
11108 -- pragma Warnings (On | Off);
11109 -- pragma Warnings (On | Off, LOCAL_NAME);
11110 -- pragma Warnings (static_string_EXPRESSION);
11111 -- pragma Warnings (On | Off, STRING_LITERAL);
11113 when Pragma_Warnings => Warnings : begin
11115 Check_At_Least_N_Arguments (1);
11116 Check_No_Identifiers;
11119 Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
11122 -- One argument case
11124 if Arg_Count = 1 then
11126 -- On/Off one argument case was processed by parser
11128 if Nkind (Argx) = N_Identifier
11130 (Chars (Argx) = Name_On
11132 Chars (Argx) = Name_Off)
11136 -- One argument case must be ON/OFF or static string expr
11138 elsif not Is_Static_String_Expression (Arg1) then
11140 ("argument of pragma% must be On/Off or " &
11141 "static string expression", Arg2);
11143 -- One argument string expression case
11147 Lit : constant Node_Id := Expr_Value_S (Argx);
11148 Str : constant String_Id := Strval (Lit);
11149 Len : constant Nat := String_Length (Str);
11157 while J <= Len loop
11158 C := Get_String_Char (Str, J);
11159 OK := In_Character_Range (C);
11162 Chr := Get_Character (C);
11166 if J < Len and then Chr = '.' then
11168 C := Get_String_Char (Str, J);
11169 Chr := Get_Character (C);
11171 if not Set_Dot_Warning_Switch (Chr) then
11173 ("invalid warning switch character " &
11180 OK := Set_Warning_Switch (Chr);
11186 ("invalid warning switch character " & Chr,
11195 -- Two or more arguments (must be two)
11198 Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
11199 Check_At_Most_N_Arguments (2);
11207 E_Id := Expression (Arg2);
11210 -- In the expansion of an inlined body, a reference to
11211 -- the formal may be wrapped in a conversion if the
11212 -- actual is a conversion. Retrieve the real entity name.
11214 if (In_Instance_Body
11215 or else In_Inlined_Body)
11216 and then Nkind (E_Id) = N_Unchecked_Type_Conversion
11218 E_Id := Expression (E_Id);
11221 -- Entity name case
11223 if Is_Entity_Name (E_Id) then
11224 E := Entity (E_Id);
11231 (E, (Chars (Expression (Arg1)) = Name_Off));
11233 if Chars (Expression (Arg1)) = Name_Off
11234 and then Warn_On_Warnings_Off
11236 Warnings_Off_Pragmas.Append ((N, E));
11239 if Is_Enumeration_Type (E) then
11243 Lit := First_Literal (E);
11244 while Present (Lit) loop
11245 Set_Warnings_Off (Lit);
11246 Next_Literal (Lit);
11251 exit when No (Homonym (E));
11256 -- Error if not entity or static string literal case
11258 elsif not Is_Static_String_Expression (Arg2) then
11260 ("second argument of pragma% must be entity " &
11261 "name or static string expression", Arg2);
11263 -- String literal case
11266 String_To_Name_Buffer
11267 (Strval (Expr_Value_S (Expression (Arg2))));
11269 -- Note on configuration pragma case: If this is a
11270 -- configuration pragma, then for an OFF pragma, we
11271 -- just set Config True in the call, which is all
11272 -- that needs to be done. For the case of ON, this
11273 -- is normally an error, unless it is canceling the
11274 -- effect of a previous OFF pragma in the same file.
11275 -- In any other case, an error will be signalled (ON
11276 -- with no matching OFF).
11278 if Chars (Argx) = Name_Off then
11279 Set_Specific_Warning_Off
11280 (Loc, Name_Buffer (1 .. Name_Len),
11281 Config => Is_Configuration_Pragma);
11283 elsif Chars (Argx) = Name_On then
11284 Set_Specific_Warning_On
11285 (Loc, Name_Buffer (1 .. Name_Len), Err);
11289 ("?pragma Warnings On with no " &
11290 "matching Warnings Off",
11300 -------------------
11301 -- Weak_External --
11302 -------------------
11304 -- pragma Weak_External ([Entity =>] LOCAL_NAME);
11306 when Pragma_Weak_External => Weak_External : declare
11311 Check_Arg_Count (1);
11312 Check_Optional_Identifier (Arg1, Name_Entity);
11313 Check_Arg_Is_Library_Level_Local_Name (Arg1);
11314 Ent := Entity (Expression (Arg1));
11316 if Rep_Item_Too_Early (Ent, N) then
11319 Ent := Underlying_Type (Ent);
11322 -- The only processing required is to link this item on to the
11323 -- list of rep items for the given entity. This is accomplished
11324 -- by the call to Rep_Item_Too_Late (when no error is detected
11325 -- and False is returned).
11327 if Rep_Item_Too_Late (Ent, N) then
11330 Set_Has_Gigi_Rep_Item (Ent);
11334 -----------------------------
11335 -- Wide_Character_Encoding --
11336 -----------------------------
11338 -- pragma Wide_Character_Encoding (IDENTIFIER);
11340 when Pragma_Wide_Character_Encoding =>
11342 -- Nothing to do, handled in parser. Note that we do not enforce
11343 -- configuration pragma placement, this pragma can appear at any
11344 -- place in the source, allowing mixed encodings within a single
11349 --------------------
11350 -- Unknown_Pragma --
11351 --------------------
11353 -- Should be impossible, since the case of an unknown pragma is
11354 -- separately processed before the case statement is entered.
11356 when Unknown_Pragma =>
11357 raise Program_Error;
11361 when Pragma_Exit => null;
11362 end Analyze_Pragma;
11364 ---------------------------------
11365 -- Delay_Config_Pragma_Analyze --
11366 ---------------------------------
11368 function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
11370 return Pragma_Name (N) = Name_Interrupt_State
11372 Pragma_Name (N) = Name_Priority_Specific_Dispatching;
11373 end Delay_Config_Pragma_Analyze;
11375 -------------------------
11376 -- Get_Base_Subprogram --
11377 -------------------------
11379 function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
11380 Result : Entity_Id;
11383 -- Follow subprogram renaming chain
11386 while Is_Subprogram (Result)
11388 (Is_Generic_Instance (Result)
11389 or else Nkind (Parent (Declaration_Node (Result))) =
11390 N_Subprogram_Renaming_Declaration)
11391 and then Present (Alias (Result))
11393 Result := Alias (Result);
11397 end Get_Base_Subprogram;
11399 -----------------------------
11400 -- Is_Config_Static_String --
11401 -----------------------------
11403 function Is_Config_Static_String (Arg : Node_Id) return Boolean is
11405 function Add_Config_Static_String (Arg : Node_Id) return Boolean;
11406 -- This is an internal recursive function that is just like the
11407 -- outer function except that it adds the string to the name buffer
11408 -- rather than placing the string in the name buffer.
11410 ------------------------------
11411 -- Add_Config_Static_String --
11412 ------------------------------
11414 function Add_Config_Static_String (Arg : Node_Id) return Boolean is
11421 if Nkind (N) = N_Op_Concat then
11422 if Add_Config_Static_String (Left_Opnd (N)) then
11423 N := Right_Opnd (N);
11429 if Nkind (N) /= N_String_Literal then
11430 Error_Msg_N ("string literal expected for pragma argument", N);
11434 for J in 1 .. String_Length (Strval (N)) loop
11435 C := Get_String_Char (Strval (N), J);
11437 if not In_Character_Range (C) then
11439 ("string literal contains invalid wide character",
11440 Sloc (N) + 1 + Source_Ptr (J));
11444 Add_Char_To_Name_Buffer (Get_Character (C));
11449 end Add_Config_Static_String;
11451 -- Start of prorcessing for Is_Config_Static_String
11456 return Add_Config_Static_String (Arg);
11457 end Is_Config_Static_String;
11459 -----------------------------------------
11460 -- Is_Non_Significant_Pragma_Reference --
11461 -----------------------------------------
11463 -- This function makes use of the following static table which indicates
11464 -- whether a given pragma is significant. A value of -1 in this table
11465 -- indicates that the reference is significant. A value of zero indicates
11466 -- than appearence as any argument is insignificant, a positive value
11467 -- indicates that appearence in that parameter position is significant.
11469 Sig_Flags : constant array (Pragma_Id) of Int :=
11471 (Pragma_AST_Entry => -1,
11472 Pragma_Abort_Defer => -1,
11473 Pragma_Ada_83 => -1,
11474 Pragma_Ada_95 => -1,
11475 Pragma_Ada_05 => -1,
11476 Pragma_Ada_2005 => -1,
11477 Pragma_All_Calls_Remote => -1,
11478 Pragma_Annotate => -1,
11479 Pragma_Assert => -1,
11480 Pragma_Assertion_Policy => 0,
11481 Pragma_Asynchronous => -1,
11482 Pragma_Atomic => 0,
11483 Pragma_Atomic_Components => 0,
11484 Pragma_Attach_Handler => -1,
11485 Pragma_Check_Name => 0,
11486 Pragma_CIL_Constructor => -1,
11487 Pragma_CPP_Class => 0,
11488 Pragma_CPP_Constructor => 0,
11489 Pragma_CPP_Virtual => 0,
11490 Pragma_CPP_Vtable => 0,
11491 Pragma_C_Pass_By_Copy => 0,
11492 Pragma_Comment => 0,
11493 Pragma_Common_Object => -1,
11494 Pragma_Compile_Time_Error => -1,
11495 Pragma_Compile_Time_Warning => -1,
11496 Pragma_Compiler_Unit => 0,
11497 Pragma_Complete_Representation => 0,
11498 Pragma_Complex_Representation => 0,
11499 Pragma_Component_Alignment => -1,
11500 Pragma_Controlled => 0,
11501 Pragma_Convention => 0,
11502 Pragma_Convention_Identifier => 0,
11503 Pragma_Debug => -1,
11504 Pragma_Debug_Policy => 0,
11505 Pragma_Detect_Blocking => -1,
11506 Pragma_Discard_Names => 0,
11507 Pragma_Elaborate => -1,
11508 Pragma_Elaborate_All => -1,
11509 Pragma_Elaborate_Body => -1,
11510 Pragma_Elaboration_Checks => -1,
11511 Pragma_Eliminate => -1,
11512 Pragma_Export => -1,
11513 Pragma_Export_Exception => -1,
11514 Pragma_Export_Function => -1,
11515 Pragma_Export_Object => -1,
11516 Pragma_Export_Procedure => -1,
11517 Pragma_Export_Value => -1,
11518 Pragma_Export_Valued_Procedure => -1,
11519 Pragma_Extend_System => -1,
11520 Pragma_Extensions_Allowed => -1,
11521 Pragma_External => -1,
11522 Pragma_Favor_Top_Level => -1,
11523 Pragma_External_Name_Casing => -1,
11524 Pragma_Fast_Math => -1,
11525 Pragma_Finalize_Storage_Only => 0,
11526 Pragma_Float_Representation => 0,
11527 Pragma_Ident => -1,
11528 Pragma_Implemented_By_Entry => -1,
11529 Pragma_Implicit_Packing => 0,
11530 Pragma_Import => +2,
11531 Pragma_Import_Exception => 0,
11532 Pragma_Import_Function => 0,
11533 Pragma_Import_Object => 0,
11534 Pragma_Import_Procedure => 0,
11535 Pragma_Import_Valued_Procedure => 0,
11536 Pragma_Initialize_Scalars => -1,
11537 Pragma_Inline => 0,
11538 Pragma_Inline_Always => 0,
11539 Pragma_Inline_Generic => 0,
11540 Pragma_Inspection_Point => -1,
11541 Pragma_Interface => +2,
11542 Pragma_Interface_Name => +2,
11543 Pragma_Interrupt_Handler => -1,
11544 Pragma_Interrupt_Priority => -1,
11545 Pragma_Interrupt_State => -1,
11546 Pragma_Java_Constructor => -1,
11547 Pragma_Java_Interface => -1,
11548 Pragma_Keep_Names => 0,
11549 Pragma_License => -1,
11550 Pragma_Link_With => -1,
11551 Pragma_Linker_Alias => -1,
11552 Pragma_Linker_Constructor => -1,
11553 Pragma_Linker_Destructor => -1,
11554 Pragma_Linker_Options => -1,
11555 Pragma_Linker_Section => -1,
11557 Pragma_Locking_Policy => -1,
11558 Pragma_Long_Float => -1,
11559 Pragma_Machine_Attribute => -1,
11561 Pragma_Main_Storage => -1,
11562 Pragma_Memory_Size => -1,
11563 Pragma_No_Return => 0,
11564 Pragma_No_Body => 0,
11565 Pragma_No_Run_Time => -1,
11566 Pragma_No_Strict_Aliasing => -1,
11567 Pragma_Normalize_Scalars => -1,
11568 Pragma_Obsolescent => 0,
11569 Pragma_Optimize => -1,
11570 Pragma_Optimize_Alignment => -1,
11573 Pragma_Passive => -1,
11574 Pragma_Preelaborable_Initialization => -1,
11575 Pragma_Polling => -1,
11576 Pragma_Persistent_BSS => 0,
11577 Pragma_Preelaborate => -1,
11578 Pragma_Preelaborate_05 => -1,
11579 Pragma_Priority => -1,
11580 Pragma_Priority_Specific_Dispatching => -1,
11581 Pragma_Profile => 0,
11582 Pragma_Profile_Warnings => 0,
11583 Pragma_Propagate_Exceptions => -1,
11584 Pragma_Psect_Object => -1,
11586 Pragma_Pure_05 => -1,
11587 Pragma_Pure_Function => -1,
11588 Pragma_Queuing_Policy => -1,
11589 Pragma_Ravenscar => -1,
11590 Pragma_Remote_Call_Interface => -1,
11591 Pragma_Remote_Types => -1,
11592 Pragma_Restricted_Run_Time => -1,
11593 Pragma_Restriction_Warnings => -1,
11594 Pragma_Restrictions => -1,
11595 Pragma_Reviewable => -1,
11596 Pragma_Share_Generic => -1,
11597 Pragma_Shared => -1,
11598 Pragma_Shared_Passive => -1,
11599 Pragma_Source_File_Name => -1,
11600 Pragma_Source_File_Name_Project => -1,
11601 Pragma_Source_Reference => -1,
11602 Pragma_Storage_Size => -1,
11603 Pragma_Storage_Unit => -1,
11604 Pragma_Static_Elaboration_Desired => -1,
11605 Pragma_Stream_Convert => -1,
11606 Pragma_Style_Checks => -1,
11607 Pragma_Subtitle => -1,
11608 Pragma_Suppress => 0,
11609 Pragma_Suppress_Exception_Locations => 0,
11610 Pragma_Suppress_All => -1,
11611 Pragma_Suppress_Debug_Info => 0,
11612 Pragma_Suppress_Initialization => 0,
11613 Pragma_System_Name => -1,
11614 Pragma_Task_Dispatching_Policy => -1,
11615 Pragma_Task_Info => -1,
11616 Pragma_Task_Name => -1,
11617 Pragma_Task_Storage => 0,
11618 Pragma_Time_Slice => -1,
11619 Pragma_Title => -1,
11620 Pragma_Unchecked_Union => 0,
11621 Pragma_Unimplemented_Unit => -1,
11622 Pragma_Universal_Aliasing => -1,
11623 Pragma_Universal_Data => -1,
11624 Pragma_Unmodified => -1,
11625 Pragma_Unreferenced => -1,
11626 Pragma_Unreferenced_Objects => -1,
11627 Pragma_Unreserve_All_Interrupts => -1,
11628 Pragma_Unsuppress => 0,
11629 Pragma_Use_VADS_Size => -1,
11630 Pragma_Validity_Checks => -1,
11631 Pragma_Volatile => 0,
11632 Pragma_Volatile_Components => 0,
11633 Pragma_Warnings => -1,
11634 Pragma_Weak_External => -1,
11635 Pragma_Wide_Character_Encoding => 0,
11636 Unknown_Pragma => 0);
11638 function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
11646 if Nkind (P) /= N_Pragma_Argument_Association then
11650 C := Sig_Flags (Get_Pragma_Id (Parent (P)));
11660 A := First (Pragma_Argument_Associations (Parent (P)));
11661 for J in 1 .. C - 1 loop
11672 end Is_Non_Significant_Pragma_Reference;
11674 ------------------------------
11675 -- Is_Pragma_String_Literal --
11676 ------------------------------
11678 -- This function returns true if the corresponding pragma argument is
11679 -- a static string expression. These are the only cases in which string
11680 -- literals can appear as pragma arguments. We also allow a string
11681 -- literal as the first argument to pragma Assert (although it will
11682 -- of course always generate a type error).
11684 function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
11685 Pragn : constant Node_Id := Parent (Par);
11686 Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
11687 Pname : constant Name_Id := Pragma_Name (Pragn);
11693 N := First (Assoc);
11700 if Pname = Name_Assert then
11703 elsif Pname = Name_Export then
11706 elsif Pname = Name_Ident then
11709 elsif Pname = Name_Import then
11712 elsif Pname = Name_Interface_Name then
11715 elsif Pname = Name_Linker_Alias then
11718 elsif Pname = Name_Linker_Section then
11721 elsif Pname = Name_Machine_Attribute then
11724 elsif Pname = Name_Source_File_Name then
11727 elsif Pname = Name_Source_Reference then
11730 elsif Pname = Name_Title then
11733 elsif Pname = Name_Subtitle then
11739 end Is_Pragma_String_Literal;
11741 --------------------------------------
11742 -- Process_Compilation_Unit_Pragmas --
11743 --------------------------------------
11745 procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
11747 -- A special check for pragma Suppress_All. This is a strange DEC
11748 -- pragma, strange because it comes at the end of the unit. If we
11749 -- have a pragma Suppress_All in the Pragmas_After of the current
11750 -- unit, then we insert a pragma Suppress (All_Checks) at the start
11751 -- of the context clause to ensure the correct processing.
11754 PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
11758 if Present (PA) then
11760 while Present (P) loop
11761 if Pragma_Name (P) = Name_Suppress_All then
11762 Prepend_To (Context_Items (N),
11763 Make_Pragma (Sloc (P),
11764 Chars => Name_Suppress,
11765 Pragma_Argument_Associations => New_List (
11766 Make_Pragma_Argument_Association (Sloc (P),
11768 Make_Identifier (Sloc (P),
11769 Chars => Name_All_Checks)))));
11777 end Process_Compilation_Unit_Pragmas;
11788 --------------------------------
11789 -- Set_Encoded_Interface_Name --
11790 --------------------------------
11792 procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
11793 Str : constant String_Id := Strval (S);
11794 Len : constant Int := String_Length (Str);
11799 Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
11802 -- Stores encoded value of character code CC. The encoding we
11803 -- use an underscore followed by four lower case hex digits.
11809 procedure Encode is
11811 Store_String_Char (Get_Char_Code ('_'));
11813 (Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
11815 (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
11817 (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
11819 (Get_Char_Code (Hex (Integer (CC and 16#0F#))));
11822 -- Start of processing for Set_Encoded_Interface_Name
11825 -- If first character is asterisk, this is a link name, and we
11826 -- leave it completely unmodified. We also ignore null strings
11827 -- (the latter case happens only in error cases) and no encoding
11828 -- should occur for Java or AAMP interface names.
11831 or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
11832 or else VM_Target /= No_VM
11833 or else AAMP_On_Target
11835 Set_Interface_Name (E, S);
11840 CC := Get_String_Char (Str, J);
11842 exit when not In_Character_Range (CC);
11844 C := Get_Character (CC);
11846 exit when C /= '_' and then C /= '$'
11847 and then C not in '0' .. '9'
11848 and then C not in 'a' .. 'z'
11849 and then C not in 'A' .. 'Z';
11852 Set_Interface_Name (E, S);
11860 -- Here we need to encode. The encoding we use as follows:
11861 -- three underscores + four hex digits (lower case)
11865 for J in 1 .. String_Length (Str) loop
11866 CC := Get_String_Char (Str, J);
11868 if not In_Character_Range (CC) then
11871 C := Get_Character (CC);
11873 if C = '_' or else C = '$'
11874 or else C in '0' .. '9'
11875 or else C in 'a' .. 'z'
11876 or else C in 'A' .. 'Z'
11878 Store_String_Char (CC);
11885 Set_Interface_Name (E,
11886 Make_String_Literal (Sloc (S),
11887 Strval => End_String));
11889 end Set_Encoded_Interface_Name;
11891 -------------------
11892 -- Set_Unit_Name --
11893 -------------------
11895 procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
11900 if Nkind (N) = N_Identifier
11901 and then Nkind (With_Item) = N_Identifier
11903 Set_Entity (N, Entity (With_Item));
11905 elsif Nkind (N) = N_Selected_Component then
11906 Change_Selected_Component_To_Expanded_Name (N);
11907 Set_Entity (N, Entity (With_Item));
11908 Set_Entity (Selector_Name (N), Entity (N));
11910 Pref := Prefix (N);
11911 Scop := Scope (Entity (N));
11912 while Nkind (Pref) = N_Selected_Component loop
11913 Change_Selected_Component_To_Expanded_Name (Pref);
11914 Set_Entity (Selector_Name (Pref), Scop);
11915 Set_Entity (Pref, Scop);
11916 Pref := Prefix (Pref);
11917 Scop := Scope (Scop);
11920 Set_Entity (Pref, Scop);
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