1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2011, 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 pragma Style_Checks (All_Checks);
27 -- Turn off subprogram body ordering check. Subprograms are in order
28 -- by RM section rather than alphabetical
33 -- Local functions, used only in this chapter
35 function P_Formal_Derived_Type_Definition return Node_Id;
36 function P_Formal_Discrete_Type_Definition return Node_Id;
37 function P_Formal_Fixed_Point_Definition return Node_Id;
38 function P_Formal_Floating_Point_Definition return Node_Id;
39 function P_Formal_Modular_Type_Definition return Node_Id;
40 function P_Formal_Package_Declaration return Node_Id;
41 function P_Formal_Private_Type_Definition return Node_Id;
42 function P_Formal_Signed_Integer_Type_Definition return Node_Id;
43 function P_Formal_Subprogram_Declaration return Node_Id;
44 function P_Formal_Type_Declaration return Node_Id;
45 function P_Formal_Type_Definition return Node_Id;
46 function P_Generic_Association return Node_Id;
48 procedure P_Formal_Object_Declarations (Decls : List_Id);
49 -- Scans one or more formal object declarations and appends them to
50 -- Decls. Scans more than one declaration only in the case where the
51 -- source has a declaration with multiple defining identifiers.
53 --------------------------------
54 -- 12.1 Generic (also 8.5.5) --
55 --------------------------------
57 -- This routine parses either one of the forms of a generic declaration
58 -- or a generic renaming declaration.
60 -- GENERIC_DECLARATION ::=
61 -- GENERIC_SUBPROGRAM_DECLARATION | GENERIC_PACKAGE_DECLARATION
63 -- GENERIC_SUBPROGRAM_DECLARATION ::=
64 -- GENERIC_FORMAL_PART SUBPROGRAM_SPECIFICATION
65 -- [ASPECT_SPECIFICATIONS];
67 -- GENERIC_PACKAGE_DECLARATION ::=
68 -- GENERIC_FORMAL_PART PACKAGE_SPECIFICATION
69 -- [ASPECT_SPECIFICATIONS];
71 -- GENERIC_FORMAL_PART ::=
72 -- generic {GENERIC_FORMAL_PARAMETER_DECLARATION | USE_CLAUSE}
74 -- GENERIC_RENAMING_DECLARATION ::=
75 -- generic package DEFINING_PROGRAM_UNIT_NAME
76 -- renames generic_package_NAME
77 -- | generic procedure DEFINING_PROGRAM_UNIT_NAME
78 -- renames generic_procedure_NAME
79 -- | generic function DEFINING_PROGRAM_UNIT_NAME
80 -- renames generic_function_NAME
82 -- GENERIC_FORMAL_PARAMETER_DECLARATION ::=
83 -- FORMAL_OBJECT_DECLARATION
84 -- | FORMAL_TYPE_DECLARATION
85 -- | FORMAL_SUBPROGRAM_DECLARATION
86 -- | FORMAL_PACKAGE_DECLARATION
88 -- The caller has checked that the initial token is GENERIC
90 -- Error recovery: can raise Error_Resync
92 function P_Generic return Node_Id is
93 Gen_Sloc : constant Source_Ptr := Token_Ptr;
98 Ren_Token : Token_Type;
99 Scan_State : Saved_Scan_State;
102 Scan; -- past GENERIC
104 if Token = Tok_Private then
105 Error_Msg_SC -- CODEFIX
106 ("PRIVATE goes before GENERIC, not after");
107 Scan; -- past junk PRIVATE token
110 Save_Scan_State (Scan_State); -- at token past GENERIC
112 -- Check for generic renaming declaration case
114 if Token = Tok_Package
115 or else Token = Tok_Function
116 or else Token = Tok_Procedure
119 Scan; -- scan past PACKAGE, FUNCTION or PROCEDURE
121 if Token = Tok_Identifier then
122 Def_Unit := P_Defining_Program_Unit_Name;
124 Check_Misspelling_Of (Tok_Renames);
126 if Token = Tok_Renames then
127 if Ren_Token = Tok_Package then
128 Decl_Node := New_Node
129 (N_Generic_Package_Renaming_Declaration, Gen_Sloc);
131 elsif Ren_Token = Tok_Procedure then
132 Decl_Node := New_Node
133 (N_Generic_Procedure_Renaming_Declaration, Gen_Sloc);
135 else -- Ren_Token = Tok_Function then
136 Decl_Node := New_Node
137 (N_Generic_Function_Renaming_Declaration, Gen_Sloc);
140 Scan; -- past RENAMES
141 Set_Defining_Unit_Name (Decl_Node, Def_Unit);
142 Set_Name (Decl_Node, P_Name);
149 -- Fall through if this is *not* a generic renaming declaration
151 Restore_Scan_State (Scan_State);
154 -- Loop through generic parameter declarations and use clauses
157 P_Pragmas_Opt (Decls);
159 if Token = Tok_Private then
160 Error_Msg_S ("generic private child packages not permitted");
161 Scan; -- past PRIVATE
164 if Token = Tok_Use then
165 Append (P_Use_Clause, Decls);
167 -- Parse a generic parameter declaration
169 if Token = Tok_Identifier then
170 P_Formal_Object_Declarations (Decls);
172 elsif Token = Tok_Type then
173 Append (P_Formal_Type_Declaration, Decls);
175 elsif Token = Tok_With then
178 if Token = Tok_Package then
179 Append (P_Formal_Package_Declaration, Decls);
181 elsif Token = Tok_Procedure or Token = Tok_Function then
182 Append (P_Formal_Subprogram_Declaration, Decls);
185 Error_Msg_BC -- CODEFIX
186 ("FUNCTION, PROCEDURE or PACKAGE expected here");
187 Resync_Past_Semicolon;
190 elsif Token = Tok_Subtype then
191 Error_Msg_SC ("subtype declaration not allowed " &
192 "as generic parameter declaration!");
193 Resync_Past_Semicolon;
201 -- Generic formal part is scanned, scan out subprogram or package spec
203 if Token = Tok_Package then
204 Gen_Decl := New_Node (N_Generic_Package_Declaration, Gen_Sloc);
205 Set_Specification (Gen_Decl, P_Package (Pf_Spcn));
208 Gen_Decl := New_Node (N_Generic_Subprogram_Declaration, Gen_Sloc);
210 Set_Specification (Gen_Decl, P_Subprogram_Specification);
212 if Nkind (Defining_Unit_Name (Specification (Gen_Decl))) =
213 N_Defining_Program_Unit_Name
214 and then Scope.Last > 0
216 Error_Msg_SP ("child unit allowed only at library level");
219 P_Aspect_Specifications (Gen_Decl);
222 Set_Generic_Formal_Declarations (Gen_Decl, Decls);
226 -------------------------------
227 -- 12.1 Generic Declaration --
228 -------------------------------
230 -- Parsed by P_Generic (12.1)
232 ------------------------------------------
233 -- 12.1 Generic Subprogram Declaration --
234 ------------------------------------------
236 -- Parsed by P_Generic (12.1)
238 ---------------------------------------
239 -- 12.1 Generic Package Declaration --
240 ---------------------------------------
242 -- Parsed by P_Generic (12.1)
244 -------------------------------
245 -- 12.1 Generic Formal Part --
246 -------------------------------
248 -- Parsed by P_Generic (12.1)
250 -------------------------------------------------
251 -- 12.1 Generic Formal Parameter Declaration --
252 -------------------------------------------------
254 -- Parsed by P_Generic (12.1)
256 ---------------------------------
257 -- 12.3 Generic Instantiation --
258 ---------------------------------
260 -- Generic package instantiation parsed by P_Package (7.1)
261 -- Generic procedure instantiation parsed by P_Subprogram (6.1)
262 -- Generic function instantiation parsed by P_Subprogram (6.1)
264 -------------------------------
265 -- 12.3 Generic Actual Part --
266 -------------------------------
268 -- GENERIC_ACTUAL_PART ::=
269 -- (GENERIC_ASSOCIATION {, GENERIC_ASSOCIATION})
271 -- Returns a list of generic associations, or Empty if none are present
273 -- Error recovery: cannot raise Error_Resync
275 function P_Generic_Actual_Part_Opt return List_Id is
276 Association_List : List_Id;
279 -- Figure out if a generic actual part operation is present. Clearly
280 -- there is no generic actual part if the current token is semicolon
281 -- or if we have aspect specifications present.
283 if Token = Tok_Semicolon or else Aspect_Specifications_Present then
286 -- If we don't have a left paren, then we have an error, and the job
287 -- is to figure out whether a left paren or semicolon was intended.
288 -- We assume a missing left paren (and hence a generic actual part
289 -- present) if the current token is not on a new line, or if it is
290 -- indented from the subprogram token. Otherwise assume missing
291 -- semicolon (which will be diagnosed by caller) and no generic part
293 elsif Token /= Tok_Left_Paren
294 and then Token_Is_At_Start_Of_Line
295 and then Start_Column <= Scope.Table (Scope.Last).Ecol
299 -- Otherwise we have a generic actual part (either a left paren is
300 -- present, or we have decided that there must be a missing left paren)
303 Association_List := New_List;
307 Append (P_Generic_Association, Association_List);
308 exit when not Comma_Present;
312 return Association_List;
315 end P_Generic_Actual_Part_Opt;
317 -------------------------------
318 -- 12.3 Generic Association --
319 -------------------------------
321 -- GENERIC_ASSOCIATION ::=
322 -- [generic_formal_parameter_SELECTOR_NAME =>]
323 -- EXPLICIT_GENERIC_ACTUAL_PARAMETER
325 -- EXPLICIT_GENERIC_ACTUAL_PARAMETER ::=
326 -- EXPRESSION | variable_NAME | subprogram_NAME
327 -- | entry_NAME | SUBTYPE_MARK | package_instance_NAME
329 -- Error recovery: cannot raise Error_Resync
331 function P_Generic_Association return Node_Id is
332 Scan_State : Saved_Scan_State;
333 Param_Name_Node : Node_Id;
334 Generic_Assoc_Node : Node_Id;
337 Generic_Assoc_Node := New_Node (N_Generic_Association, Token_Ptr);
339 -- Ada 2005: an association can be given by: others => <>
341 if Token = Tok_Others then
342 if Ada_Version < Ada_2005 then
344 ("partial parametrization of formal packages" &
345 " is an Ada 2005 extension");
347 ("\unit must be compiled with -gnat05 switch");
352 if Token /= Tok_Arrow then
353 Error_Msg_BC ("expect arrow after others");
358 if Token /= Tok_Box then
359 Error_Msg_BC ("expect Box after arrow");
364 -- Source position of the others choice is beginning of construct
366 return New_Node (N_Others_Choice, Sloc (Generic_Assoc_Node));
369 if Token in Token_Class_Desig then
370 Param_Name_Node := Token_Node;
371 Save_Scan_State (Scan_State); -- at designator
372 Scan; -- past simple name or operator symbol
374 if Token = Tok_Arrow then
376 Set_Selector_Name (Generic_Assoc_Node, Param_Name_Node);
378 Restore_Scan_State (Scan_State); -- to designator
382 -- In Ada 2005 the actual can be a box
384 if Token = Tok_Box then
386 Set_Box_Present (Generic_Assoc_Node);
387 Set_Explicit_Generic_Actual_Parameter (Generic_Assoc_Node, Empty);
390 Set_Explicit_Generic_Actual_Parameter
391 (Generic_Assoc_Node, P_Expression);
394 return Generic_Assoc_Node;
395 end P_Generic_Association;
397 ---------------------------------------------
398 -- 12.3 Explicit Generic Actual Parameter --
399 ---------------------------------------------
401 -- Parsed by P_Generic_Association (12.3)
403 --------------------------------------
404 -- 12.4 Formal Object Declarations --
405 --------------------------------------
407 -- FORMAL_OBJECT_DECLARATION ::=
408 -- DEFINING_IDENTIFIER_LIST :
409 -- MODE [NULL_EXCLUSION] SUBTYPE_MARK [:= DEFAULT_EXPRESSION]
410 -- [ASPECT_SPECIFICATIONS];
411 -- | DEFINING_IDENTIFIER_LIST :
412 -- MODE ACCESS_DEFINITION [:= DEFAULT_EXPRESSION];
413 -- [ASPECT_SPECIFICATIONS];
415 -- The caller has checked that the initial token is an identifier
417 -- Error recovery: cannot raise Error_Resync
419 procedure P_Formal_Object_Declarations (Decls : List_Id) is
422 Not_Null_Present : Boolean := False;
424 Scan_State : Saved_Scan_State;
426 Idents : array (Int range 1 .. 4096) of Entity_Id;
427 -- This array holds the list of defining identifiers. The upper bound
428 -- of 4096 is intended to be essentially infinite, and we do not even
429 -- bother to check for it being exceeded.
432 Idents (1) := P_Defining_Identifier (C_Comma_Colon);
434 while Comma_Present loop
435 Num_Idents := Num_Idents + 1;
436 Idents (Num_Idents) := P_Defining_Identifier (C_Comma_Colon);
441 -- If there are multiple identifiers, we repeatedly scan the
442 -- type and initialization expression information by resetting
443 -- the scan pointer (so that we get completely separate trees
444 -- for each occurrence).
446 if Num_Idents > 1 then
447 Save_Scan_State (Scan_State);
450 -- Loop through defining identifiers in list
454 Decl_Node := New_Node (N_Formal_Object_Declaration, Token_Ptr);
455 Set_Defining_Identifier (Decl_Node, Idents (Ident));
458 Not_Null_Present := P_Null_Exclusion; -- Ada 2005 (AI-423)
460 -- Ada 2005 (AI-423): Formal object with an access definition
462 if Token = Tok_Access then
464 -- The access definition is still parsed and set even though
465 -- the compilation may not use the proper switch. This action
466 -- ensures the required local error recovery.
468 Set_Access_Definition (Decl_Node,
469 P_Access_Definition (Not_Null_Present));
471 if Ada_Version < Ada_2005 then
473 ("access definition not allowed in formal object " &
475 Error_Msg_SP ("\unit must be compiled with -gnat05 switch");
478 -- Formal object with a subtype mark
481 Set_Null_Exclusion_Present (Decl_Node, Not_Null_Present);
482 Set_Subtype_Mark (Decl_Node, P_Subtype_Mark_Resync);
486 Set_Default_Expression (Decl_Node, Init_Expr_Opt);
487 P_Aspect_Specifications (Decl_Node);
490 Set_Prev_Ids (Decl_Node, True);
493 if Ident < Num_Idents then
494 Set_More_Ids (Decl_Node, True);
497 Append (Decl_Node, Decls);
499 exit Ident_Loop when Ident = Num_Idents;
501 Restore_Scan_State (Scan_State);
503 end P_Formal_Object_Declarations;
505 -----------------------------------
506 -- 12.5 Formal Type Declaration --
507 -----------------------------------
509 -- FORMAL_TYPE_DECLARATION ::=
510 -- type DEFINING_IDENTIFIER [DISCRIMINANT_PART]
511 -- is FORMAL_TYPE_DEFINITION
512 -- [ASPECT_SPECIFICATIONS];
514 -- The caller has checked that the initial token is TYPE
516 -- Error recovery: cannot raise Error_Resync
518 function P_Formal_Type_Declaration return Node_Id is
523 Decl_Node := New_Node (N_Formal_Type_Declaration, Token_Ptr);
525 Set_Defining_Identifier (Decl_Node, P_Defining_Identifier);
527 if P_Unknown_Discriminant_Part_Opt then
528 Set_Unknown_Discriminants_Present (Decl_Node, True);
530 Set_Discriminant_Specifications
531 (Decl_Node, P_Known_Discriminant_Part_Opt);
534 if Token = Tok_Semicolon then
536 -- Ada 2012: Incomplete formal type
538 Scan; -- past semicolon
540 if Ada_Version < Ada_2012 then
542 ("`formal incomplete type` is an Ada 2012 feature", Decl_Node);
544 ("\unit must be compiled with -gnat2012 switch", Decl_Node);
547 Set_Formal_Type_Definition
549 New_Node (N_Formal_Incomplete_Type_Definition, Token_Ptr));
556 Def_Node := P_Formal_Type_Definition;
558 if Nkind (Def_Node) = N_Formal_Incomplete_Type_Definition
559 and then Ada_Version < Ada_2012
562 ("`formal incomplete type` is an Ada 2012 feature", Decl_Node);
564 ("\unit must be compiled with -gnat2012 switch", Decl_Node);
567 if Def_Node /= Error then
568 Set_Formal_Type_Definition (Decl_Node, Def_Node);
569 P_Aspect_Specifications (Decl_Node);
574 -- If we have aspect specifications, skip them
576 if Aspect_Specifications_Present then
577 P_Aspect_Specifications (Error);
579 -- If we have semicolon, skip it to avoid cascaded errors
581 elsif Token = Tok_Semicolon then
582 Scan; -- past semicolon
587 end P_Formal_Type_Declaration;
589 ----------------------------------
590 -- 12.5 Formal Type Definition --
591 ----------------------------------
593 -- FORMAL_TYPE_DEFINITION ::=
594 -- FORMAL_PRIVATE_TYPE_DEFINITION
595 -- | FORMAL_INCOMPLETE_TYPE_DEFINITION
596 -- | FORMAL_DERIVED_TYPE_DEFINITION
597 -- | FORMAL_DISCRETE_TYPE_DEFINITION
598 -- | FORMAL_SIGNED_INTEGER_TYPE_DEFINITION
599 -- | FORMAL_MODULAR_TYPE_DEFINITION
600 -- | FORMAL_FLOATING_POINT_DEFINITION
601 -- | FORMAL_ORDINARY_FIXED_POINT_DEFINITION
602 -- | FORMAL_DECIMAL_FIXED_POINT_DEFINITION
603 -- | FORMAL_ARRAY_TYPE_DEFINITION
604 -- | FORMAL_ACCESS_TYPE_DEFINITION
605 -- | FORMAL_INTERFACE_TYPE_DEFINITION
607 -- FORMAL_ARRAY_TYPE_DEFINITION ::= ARRAY_TYPE_DEFINITION
609 -- FORMAL_ACCESS_TYPE_DEFINITION ::= ACCESS_TYPE_DEFINITION
611 -- FORMAL_INTERFACE_TYPE_DEFINITION ::= INTERFACE_TYPE_DEFINITION
613 function P_Formal_Type_Definition return Node_Id is
614 Scan_State : Saved_Scan_State;
615 Typedef_Node : Node_Id;
618 if Token_Name = Name_Abstract then
619 Check_95_Keyword (Tok_Abstract, Tok_Tagged);
622 if Token_Name = Name_Tagged then
623 Check_95_Keyword (Tok_Tagged, Tok_Private);
624 Check_95_Keyword (Tok_Tagged, Tok_Limited);
629 -- Mostly we can tell what we have from the initial token. The one
630 -- exception is ABSTRACT, where we have to scan ahead to see if we
631 -- have a formal derived type or a formal private type definition.
633 -- In addition, in Ada 2005 LIMITED may appear after abstract, so
634 -- that the lookahead must be extended by one more token.
637 Save_Scan_State (Scan_State);
638 Scan; -- past ABSTRACT
640 if Token = Tok_New then
641 Restore_Scan_State (Scan_State); -- to ABSTRACT
642 return P_Formal_Derived_Type_Definition;
644 elsif Token = Tok_Limited then
645 Scan; -- past LIMITED
647 if Token = Tok_New then
648 Restore_Scan_State (Scan_State); -- to ABSTRACT
649 return P_Formal_Derived_Type_Definition;
652 Restore_Scan_State (Scan_State); -- to ABSTRACT
653 return P_Formal_Private_Type_Definition;
656 -- Ada 2005 (AI-443): Abstract synchronized formal derived type
658 elsif Token = Tok_Synchronized then
659 Restore_Scan_State (Scan_State); -- to ABSTRACT
660 return P_Formal_Derived_Type_Definition;
663 Restore_Scan_State (Scan_State); -- to ABSTRACT
664 return P_Formal_Private_Type_Definition;
668 return P_Access_Type_Definition;
671 return P_Array_Type_Definition;
674 return P_Formal_Fixed_Point_Definition;
677 return P_Formal_Floating_Point_Definition;
679 when Tok_Interface => -- Ada 2005 (AI-251)
680 return P_Interface_Type_Definition (Abstract_Present => False);
682 when Tok_Left_Paren =>
683 return P_Formal_Discrete_Type_Definition;
686 Save_Scan_State (Scan_State);
687 Scan; -- past LIMITED
689 if Token = Tok_Interface then
691 P_Interface_Type_Definition (Abstract_Present => False);
692 Set_Limited_Present (Typedef_Node);
695 elsif Token = Tok_New then
696 Restore_Scan_State (Scan_State); -- to LIMITED
697 return P_Formal_Derived_Type_Definition;
700 if Token = Tok_Abstract then
701 Error_Msg_SC -- CODEFIX
702 ("ABSTRACT must come before LIMITED");
703 Scan; -- past improper ABSTRACT
705 if Token = Tok_New then
706 Restore_Scan_State (Scan_State); -- to LIMITED
707 return P_Formal_Derived_Type_Definition;
710 Restore_Scan_State (Scan_State);
711 return P_Formal_Private_Type_Definition;
715 Restore_Scan_State (Scan_State);
716 return P_Formal_Private_Type_Definition;
720 return P_Formal_Modular_Type_Definition;
723 return P_Formal_Derived_Type_Definition;
726 if P_Null_Exclusion then
727 Typedef_Node := P_Access_Type_Definition;
728 Set_Null_Exclusion_Present (Typedef_Node);
732 Error_Msg_SC ("expect valid formal access definition!");
733 Resync_Past_Semicolon;
738 return P_Formal_Private_Type_Definition;
741 if Next_Token_Is (Tok_Semicolon) then
743 New_Node (N_Formal_Incomplete_Type_Definition, Token_Ptr);
744 Set_Tagged_Present (Typedef_Node);
750 return P_Formal_Private_Type_Definition;
754 return P_Formal_Signed_Integer_Type_Definition;
757 Error_Msg_SC ("record not allowed in generic type definition!");
758 Discard_Junk_Node (P_Record_Definition);
761 -- Ada 2005 (AI-345): Task, Protected or Synchronized interface or
762 -- (AI-443): Synchronized formal derived type declaration.
769 Saved_Token : constant Token_Type := Token;
772 Scan; -- past TASK, PROTECTED or SYNCHRONIZED
774 -- Synchronized derived type
776 if Token = Tok_New then
777 Typedef_Node := P_Formal_Derived_Type_Definition;
779 if Saved_Token = Tok_Synchronized then
780 Set_Synchronized_Present (Typedef_Node);
782 Error_Msg_SC ("invalid kind of formal derived type");
789 P_Interface_Type_Definition (Abstract_Present => False);
793 Set_Task_Present (Typedef_Node);
795 when Tok_Protected =>
796 Set_Protected_Present (Typedef_Node);
798 when Tok_Synchronized =>
799 Set_Synchronized_Present (Typedef_Node);
810 Error_Msg_BC ("expecting generic type definition here");
811 Resync_Past_Semicolon;
815 end P_Formal_Type_Definition;
817 --------------------------------------------
818 -- 12.5.1 Formal Private Type Definition --
819 --------------------------------------------
821 -- FORMAL_PRIVATE_TYPE_DEFINITION ::=
822 -- [[abstract] tagged] [limited] private
824 -- The caller has checked the initial token is PRIVATE, ABSTRACT,
827 -- Error recovery: cannot raise Error_Resync
829 function P_Formal_Private_Type_Definition return Node_Id is
833 Def_Node := New_Node (N_Formal_Private_Type_Definition, Token_Ptr);
835 if Token = Tok_Abstract then
836 Scan; -- past ABSTRACT
838 if Token_Name = Name_Tagged then
839 Check_95_Keyword (Tok_Tagged, Tok_Private);
840 Check_95_Keyword (Tok_Tagged, Tok_Limited);
843 if Token /= Tok_Tagged then
844 Error_Msg_SP ("ABSTRACT must be followed by TAGGED");
846 Set_Abstract_Present (Def_Node, True);
850 if Token = Tok_Tagged then
851 Set_Tagged_Present (Def_Node, True);
855 if Token = Tok_Limited then
856 Set_Limited_Present (Def_Node, True);
857 Scan; -- past LIMITED
860 if Token = Tok_Abstract then
861 if Prev_Token = Tok_Tagged then
862 Error_Msg_SC -- CODEFIX
863 ("ABSTRACT must come before TAGGED");
864 elsif Prev_Token = Tok_Limited then
865 Error_Msg_SC -- CODEFIX
866 ("ABSTRACT must come before LIMITED");
869 Resync_Past_Semicolon;
871 elsif Token = Tok_Tagged then
872 Error_Msg_SC -- CODEFIX
873 ("TAGGED must come before LIMITED");
874 Resync_Past_Semicolon;
877 Set_Sloc (Def_Node, Token_Ptr);
880 if Token = Tok_Tagged then -- CODEFIX
881 Error_Msg_SC ("TAGGED must come before PRIVATE");
884 elsif Token = Tok_Abstract then -- CODEFIX
885 Error_Msg_SC ("`ABSTRACT TAGGED` must come before PRIVATE");
886 Scan; -- past ABSTRACT
888 if Token = Tok_Tagged then
894 end P_Formal_Private_Type_Definition;
896 --------------------------------------------
897 -- 12.5.1 Formal Derived Type Definition --
898 --------------------------------------------
900 -- FORMAL_DERIVED_TYPE_DEFINITION ::=
901 -- [abstract] [limited | synchronized]
902 -- new SUBTYPE_MARK [[and INTERFACE_LIST] with private]
904 -- The caller has checked the initial token(s) is/are NEW, ABSTRACT NEW,
905 -- or LIMITED NEW, ABSTRACT LIMITED NEW, SYNCHRONIZED NEW or ABSTRACT
908 -- Error recovery: cannot raise Error_Resync
910 function P_Formal_Derived_Type_Definition return Node_Id is
914 Def_Node := New_Node (N_Formal_Derived_Type_Definition, Token_Ptr);
916 if Token = Tok_Abstract then
917 Set_Abstract_Present (Def_Node);
918 Scan; -- past ABSTRACT
921 if Token = Tok_Limited then
922 Set_Limited_Present (Def_Node);
923 Scan; -- past LIMITED
925 if Ada_Version < Ada_2005 then
927 ("LIMITED in derived type is an Ada 2005 extension");
929 ("\unit must be compiled with -gnat05 switch");
932 elsif Token = Tok_Synchronized then
933 Set_Synchronized_Present (Def_Node);
934 Scan; -- past SYNCHRONIZED
936 if Ada_Version < Ada_2005 then
938 ("SYNCHRONIZED in derived type is an Ada 2005 extension");
940 ("\unit must be compiled with -gnat05 switch");
944 if Token = Tok_Abstract then
945 Scan; -- past ABSTRACT, diagnosed already in caller.
949 Set_Subtype_Mark (Def_Node, P_Subtype_Mark);
952 -- Ada 2005 (AI-251): Deal with interfaces
954 if Token = Tok_And then
957 if Ada_Version < Ada_2005 then
959 ("abstract interface is an Ada 2005 extension");
960 Error_Msg_SP ("\unit must be compiled with -gnat05 switch");
963 Set_Interface_List (Def_Node, New_List);
966 Append (P_Qualified_Simple_Name, Interface_List (Def_Node));
967 exit when Token /= Tok_And;
972 if Token = Tok_With then
974 Set_Private_Present (Def_Node, True);
977 elsif Token = Tok_Tagged then
980 if Token = Tok_Private then
981 Error_Msg_SC -- CODEFIX
982 ("TAGGED should be WITH");
983 Set_Private_Present (Def_Node, True);
991 end P_Formal_Derived_Type_Definition;
993 ---------------------------------------------
994 -- 12.5.2 Formal Discrete Type Definition --
995 ---------------------------------------------
997 -- FORMAL_DISCRETE_TYPE_DEFINITION ::= (<>)
999 -- The caller has checked the initial token is left paren
1001 -- Error recovery: cannot raise Error_Resync
1003 function P_Formal_Discrete_Type_Definition return Node_Id is
1007 Def_Node := New_Node (N_Formal_Discrete_Type_Definition, Token_Ptr);
1008 Scan; -- past left paren
1012 end P_Formal_Discrete_Type_Definition;
1014 ---------------------------------------------------
1015 -- 12.5.2 Formal Signed Integer Type Definition --
1016 ---------------------------------------------------
1018 -- FORMAL_SIGNED_INTEGER_TYPE_DEFINITION ::= range <>
1020 -- The caller has checked the initial token is RANGE
1022 -- Error recovery: cannot raise Error_Resync
1024 function P_Formal_Signed_Integer_Type_Definition return Node_Id is
1029 New_Node (N_Formal_Signed_Integer_Type_Definition, Token_Ptr);
1033 end P_Formal_Signed_Integer_Type_Definition;
1035 --------------------------------------------
1036 -- 12.5.2 Formal Modular Type Definition --
1037 --------------------------------------------
1039 -- FORMAL_MODULAR_TYPE_DEFINITION ::= mod <>
1041 -- The caller has checked the initial token is MOD
1043 -- Error recovery: cannot raise Error_Resync
1045 function P_Formal_Modular_Type_Definition return Node_Id is
1050 New_Node (N_Formal_Modular_Type_Definition, Token_Ptr);
1054 end P_Formal_Modular_Type_Definition;
1056 ----------------------------------------------
1057 -- 12.5.2 Formal Floating Point Definition --
1058 ----------------------------------------------
1060 -- FORMAL_FLOATING_POINT_DEFINITION ::= digits <>
1062 -- The caller has checked the initial token is DIGITS
1064 -- Error recovery: cannot raise Error_Resync
1066 function P_Formal_Floating_Point_Definition return Node_Id is
1071 New_Node (N_Formal_Floating_Point_Definition, Token_Ptr);
1072 Scan; -- past DIGITS
1075 end P_Formal_Floating_Point_Definition;
1077 -------------------------------------------
1078 -- 12.5.2 Formal Fixed Point Definition --
1079 -------------------------------------------
1081 -- This routine parses either a formal ordinary fixed point definition
1082 -- or a formal decimal fixed point definition:
1084 -- FORMAL_ORDINARY_FIXED_POINT_DEFINITION ::= delta <>
1086 -- FORMAL_DECIMAL_FIXED_POINT_DEFINITION ::= delta <> digits <>
1088 -- The caller has checked the initial token is DELTA
1090 -- Error recovery: cannot raise Error_Resync
1092 function P_Formal_Fixed_Point_Definition return Node_Id is
1094 Delta_Sloc : Source_Ptr;
1097 Delta_Sloc := Token_Ptr;
1101 if Token = Tok_Digits then
1103 New_Node (N_Formal_Decimal_Fixed_Point_Definition, Delta_Sloc);
1104 Scan; -- past DIGITS
1108 New_Node (N_Formal_Ordinary_Fixed_Point_Definition, Delta_Sloc);
1112 end P_Formal_Fixed_Point_Definition;
1114 ----------------------------------------------------
1115 -- 12.5.2 Formal Ordinary Fixed Point Definition --
1116 ----------------------------------------------------
1118 -- Parsed by P_Formal_Fixed_Point_Definition (12.5.2)
1120 ---------------------------------------------------
1121 -- 12.5.2 Formal Decimal Fixed Point Definition --
1122 ---------------------------------------------------
1124 -- Parsed by P_Formal_Fixed_Point_Definition (12.5.2)
1126 ------------------------------------------
1127 -- 12.5.3 Formal Array Type Definition --
1128 ------------------------------------------
1130 -- Parsed by P_Formal_Type_Definition (12.5)
1132 -------------------------------------------
1133 -- 12.5.4 Formal Access Type Definition --
1134 -------------------------------------------
1136 -- Parsed by P_Formal_Type_Definition (12.5)
1138 -----------------------------------------
1139 -- 12.6 Formal Subprogram Declaration --
1140 -----------------------------------------
1142 -- FORMAL_SUBPROGRAM_DECLARATION ::=
1143 -- FORMAL_CONCRETE_SUBPROGRAM_DECLARATION
1144 -- | FORMAL_ABSTRACT_SUBPROGRAM_DECLARATION
1146 -- FORMAL_CONCRETE_SUBPROGRAM_DECLARATION ::=
1147 -- with SUBPROGRAM_SPECIFICATION [is SUBPROGRAM_DEFAULT]
1148 -- [ASPECT_SPECIFICATIONS];
1150 -- FORMAL_ABSTRACT_SUBPROGRAM_DECLARATION ::=
1151 -- with SUBPROGRAM_SPECIFICATION is abstract [SUBPROGRAM_DEFAULT]
1152 -- [ASPECT_SPECIFICATIONS];
1154 -- SUBPROGRAM_DEFAULT ::= DEFAULT_NAME | <>
1156 -- DEFAULT_NAME ::= NAME | null
1158 -- The caller has checked that the initial tokens are WITH FUNCTION or
1159 -- WITH PROCEDURE, and the initial WITH has been scanned out.
1161 -- A null default is an Ada 2005 feature
1163 -- Error recovery: cannot raise Error_Resync
1165 function P_Formal_Subprogram_Declaration return Node_Id is
1166 Prev_Sloc : constant Source_Ptr := Prev_Token_Ptr;
1167 Spec_Node : constant Node_Id := P_Subprogram_Specification;
1171 if Token = Tok_Is then
1172 T_Is; -- past IS, skip extra IS or ";"
1174 if Token = Tok_Abstract then
1176 New_Node (N_Formal_Abstract_Subprogram_Declaration, Prev_Sloc);
1177 Scan; -- past ABSTRACT
1179 if Ada_Version < Ada_2005 then
1181 ("formal abstract subprograms are an Ada 2005 extension");
1182 Error_Msg_SP ("\unit must be compiled with -gnat05 switch");
1187 New_Node (N_Formal_Concrete_Subprogram_Declaration, Prev_Sloc);
1190 Set_Specification (Def_Node, Spec_Node);
1192 if Token = Tok_Semicolon then
1195 elsif Aspect_Specifications_Present then
1198 elsif Token = Tok_Box then
1199 Set_Box_Present (Def_Node, True);
1202 elsif Token = Tok_Null then
1203 if Ada_Version < Ada_2005 then
1205 ("null default subprograms are an Ada 2005 extension");
1206 Error_Msg_SP ("\unit must be compiled with -gnat05 switch");
1209 if Nkind (Spec_Node) = N_Procedure_Specification then
1210 Set_Null_Present (Spec_Node);
1212 Error_Msg_SP ("only procedures can be null");
1218 Set_Default_Name (Def_Node, P_Name);
1223 New_Node (N_Formal_Concrete_Subprogram_Declaration, Prev_Sloc);
1224 Set_Specification (Def_Node, Spec_Node);
1227 P_Aspect_Specifications (Def_Node);
1229 end P_Formal_Subprogram_Declaration;
1231 ------------------------------
1232 -- 12.6 Subprogram Default --
1233 ------------------------------
1235 -- Parsed by P_Formal_Procedure_Declaration (12.6)
1237 ------------------------
1238 -- 12.6 Default Name --
1239 ------------------------
1241 -- Parsed by P_Formal_Procedure_Declaration (12.6)
1243 --------------------------------------
1244 -- 12.7 Formal Package Declaration --
1245 --------------------------------------
1247 -- FORMAL_PACKAGE_DECLARATION ::=
1248 -- with package DEFINING_IDENTIFIER
1249 -- is new generic_package_NAME FORMAL_PACKAGE_ACTUAL_PART
1250 -- [ASPECT_SPECIFICATIONS];
1252 -- FORMAL_PACKAGE_ACTUAL_PART ::=
1253 -- ([OTHERS =>] <>) |
1254 -- [GENERIC_ACTUAL_PART]
1255 -- (FORMAL_PACKAGE_ASSOCIATION {, FORMAL_PACKAGE_ASSOCIATION}
1258 -- FORMAL_PACKAGE_ASSOCIATION ::=
1259 -- GENERIC_ASSOCIATION
1260 -- | GENERIC_FORMAL_PARAMETER_SELECTOR_NAME => <>
1262 -- The caller has checked that the initial tokens are WITH PACKAGE,
1263 -- and the initial WITH has been scanned out (so Token = Tok_Package).
1265 -- Error recovery: cannot raise Error_Resync
1267 function P_Formal_Package_Declaration return Node_Id is
1269 Scan_State : Saved_Scan_State;
1272 Def_Node := New_Node (N_Formal_Package_Declaration, Prev_Token_Ptr);
1273 Scan; -- past PACKAGE
1274 Set_Defining_Identifier (Def_Node, P_Defining_Identifier (C_Is));
1277 Set_Name (Def_Node, P_Qualified_Simple_Name);
1279 if Token = Tok_Left_Paren then
1280 Save_Scan_State (Scan_State); -- at the left paren
1281 Scan; -- past the left paren
1283 if Token = Tok_Box then
1284 Set_Box_Present (Def_Node, True);
1289 Restore_Scan_State (Scan_State); -- to the left paren
1290 Set_Generic_Associations (Def_Node, P_Generic_Actual_Part_Opt);
1294 P_Aspect_Specifications (Def_Node);
1296 end P_Formal_Package_Declaration;
1298 --------------------------------------
1299 -- 12.7 Formal Package Actual Part --
1300 --------------------------------------
1302 -- Parsed by P_Formal_Package_Declaration (12.7)