1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2005, 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 pragma Style_Checks (All_Checks);
28 -- Turn off subprogram body ordering check. Subprograms are in order
29 -- by RM section rather than alphabetical
34 -- Local functions, used only in this chapter
36 function P_Formal_Derived_Type_Definition return Node_Id;
37 function P_Formal_Discrete_Type_Definition return Node_Id;
38 function P_Formal_Fixed_Point_Definition return Node_Id;
39 function P_Formal_Floating_Point_Definition return Node_Id;
40 function P_Formal_Modular_Type_Definition return Node_Id;
41 function P_Formal_Package_Declaration return Node_Id;
42 function P_Formal_Private_Type_Definition return Node_Id;
43 function P_Formal_Signed_Integer_Type_Definition return Node_Id;
44 function P_Formal_Subprogram_Declaration return Node_Id;
45 function P_Formal_Type_Declaration return Node_Id;
46 function P_Formal_Type_Definition return Node_Id;
47 function P_Generic_Association return Node_Id;
49 procedure P_Formal_Object_Declarations (Decls : List_Id);
50 -- Scans one or more formal object declarations and appends them to
51 -- Decls. Scans more than one declaration only in the case where the
52 -- source has a declaration with multiple defining identifiers.
54 --------------------------------
55 -- 12.1 Generic (also 8.5.5) --
56 --------------------------------
58 -- This routine parses either one of the forms of a generic declaration
59 -- or a generic renaming declaration.
61 -- GENERIC_DECLARATION ::=
62 -- GENERIC_SUBPROGRAM_DECLARATION | GENERIC_PACKAGE_DECLARATION
64 -- GENERIC_SUBPROGRAM_DECLARATION ::=
65 -- GENERIC_FORMAL_PART SUBPROGRAM_SPECIFICATION;
67 -- GENERIC_PACKAGE_DECLARATION ::=
68 -- GENERIC_FORMAL_PART PACKAGE_SPECIFICATION;
70 -- GENERIC_FORMAL_PART ::=
71 -- generic {GENERIC_FORMAL_PARAMETER_DECLARATION | USE_CLAUSE}
73 -- GENERIC_RENAMING_DECLARATION ::=
74 -- generic package DEFINING_PROGRAM_UNIT_NAME
75 -- renames generic_package_NAME
76 -- | generic procedure DEFINING_PROGRAM_UNIT_NAME
77 -- renames generic_procedure_NAME
78 -- | generic function DEFINING_PROGRAM_UNIT_NAME
79 -- renames generic_function_NAME
81 -- GENERIC_FORMAL_PARAMETER_DECLARATION ::=
82 -- FORMAL_OBJECT_DECLARATION
83 -- | FORMAL_TYPE_DECLARATION
84 -- | FORMAL_SUBPROGRAM_DECLARATION
85 -- | FORMAL_PACKAGE_DECLARATION
87 -- The caller has checked that the initial token is GENERIC
89 -- Error recovery: can raise Error_Resync
91 function P_Generic return Node_Id is
92 Gen_Sloc : constant Source_Ptr := Token_Ptr;
97 Ren_Token : Token_Type;
98 Scan_State : Saved_Scan_State;
101 Scan; -- past GENERIC
103 if Token = Tok_Private then
104 Error_Msg_SC ("PRIVATE goes before GENERIC, not after");
105 Scan; -- past junk PRIVATE token
108 Save_Scan_State (Scan_State); -- at token past GENERIC
110 -- Check for generic renaming declaration case
112 if Token = Tok_Package
113 or else Token = Tok_Function
114 or else Token = Tok_Procedure
117 Scan; -- scan past PACKAGE, FUNCTION or PROCEDURE
119 if Token = Tok_Identifier then
120 Def_Unit := P_Defining_Program_Unit_Name;
122 Check_Misspelling_Of (Tok_Renames);
124 if Token = Tok_Renames then
125 if Ren_Token = Tok_Package then
126 Decl_Node := New_Node
127 (N_Generic_Package_Renaming_Declaration, Gen_Sloc);
129 elsif Ren_Token = Tok_Procedure then
130 Decl_Node := New_Node
131 (N_Generic_Procedure_Renaming_Declaration, Gen_Sloc);
133 else -- Ren_Token = Tok_Function then
134 Decl_Node := New_Node
135 (N_Generic_Function_Renaming_Declaration, Gen_Sloc);
138 Scan; -- past RENAMES
139 Set_Defining_Unit_Name (Decl_Node, Def_Unit);
140 Set_Name (Decl_Node, P_Name);
147 -- Fall through if this is *not* a generic renaming declaration
149 Restore_Scan_State (Scan_State);
152 -- Loop through generic parameter declarations and use clauses
155 P_Pragmas_Opt (Decls);
157 if Token = Tok_Private then
158 Error_Msg_S ("generic private child packages not permitted");
159 Scan; -- past PRIVATE
162 if Token = Tok_Use then
163 Append (P_Use_Clause, Decls);
165 -- Parse a generic parameter declaration
167 if Token = Tok_Identifier then
168 P_Formal_Object_Declarations (Decls);
170 elsif Token = Tok_Type then
171 Append (P_Formal_Type_Declaration, Decls);
173 elsif Token = Tok_With then
176 if Token = Tok_Package then
177 Append (P_Formal_Package_Declaration, Decls);
179 elsif Token = Tok_Procedure or Token = Tok_Function then
180 Append (P_Formal_Subprogram_Declaration, Decls);
184 ("FUNCTION, PROCEDURE or PACKAGE expected here");
185 Resync_Past_Semicolon;
188 elsif Token = Tok_Subtype then
189 Error_Msg_SC ("subtype declaration not allowed " &
190 "as generic parameter declaration!");
191 Resync_Past_Semicolon;
200 -- Generic formal part is scanned, scan out subprogram or package spec
202 if Token = Tok_Package then
203 Gen_Decl := New_Node (N_Generic_Package_Declaration, Gen_Sloc);
204 Set_Specification (Gen_Decl, P_Package (Pf_Spcn));
206 Gen_Decl := New_Node (N_Generic_Subprogram_Declaration, Gen_Sloc);
208 Set_Specification (Gen_Decl, P_Subprogram_Specification);
210 if Nkind (Defining_Unit_Name (Specification (Gen_Decl))) =
211 N_Defining_Program_Unit_Name
212 and then Scope.Last > 0
214 Error_Msg_SP ("child unit allowed only at library level");
219 Set_Generic_Formal_Declarations (Gen_Decl, Decls);
223 -------------------------------
224 -- 12.1 Generic Declaration --
225 -------------------------------
227 -- Parsed by P_Generic (12.1)
229 ------------------------------------------
230 -- 12.1 Generic Subprogram Declaration --
231 ------------------------------------------
233 -- Parsed by P_Generic (12.1)
235 ---------------------------------------
236 -- 12.1 Generic Package Declaration --
237 ---------------------------------------
239 -- Parsed by P_Generic (12.1)
241 -------------------------------
242 -- 12.1 Generic Formal Part --
243 -------------------------------
245 -- Parsed by P_Generic (12.1)
247 -------------------------------------------------
248 -- 12.1 Generic Formal Parameter Declaration --
249 -------------------------------------------------
251 -- Parsed by P_Generic (12.1)
253 ---------------------------------
254 -- 12.3 Generic Instantiation --
255 ---------------------------------
257 -- Generic package instantiation parsed by P_Package (7.1)
258 -- Generic procedure instantiation parsed by P_Subprogram (6.1)
259 -- Generic function instantiation parsed by P_Subprogram (6.1)
261 -------------------------------
262 -- 12.3 Generic Actual Part --
263 -------------------------------
265 -- GENERIC_ACTUAL_PART ::=
266 -- (GENERIC_ASSOCIATION {, GENERIC_ASSOCIATION})
268 -- Returns a list of generic associations, or Empty if none are present
270 -- Error recovery: cannot raise Error_Resync
272 function P_Generic_Actual_Part_Opt return List_Id is
273 Association_List : List_Id;
276 -- Figure out if a generic actual part operation is present. Clearly
277 -- there is no generic actual part if the current token is semicolon
279 if Token = Tok_Semicolon then
282 -- If we don't have a left paren, then we have an error, and the job
283 -- is to figure out whether a left paren or semicolon was intended.
284 -- We assume a missing left paren (and hence a generic actual part
285 -- present) if the current token is not on a new line, or if it is
286 -- indented from the subprogram token. Otherwise assume missing
287 -- semicolon (which will be diagnosed by caller) and no generic part
289 elsif Token /= Tok_Left_Paren
290 and then Token_Is_At_Start_Of_Line
291 and then Start_Column <= Scope.Table (Scope.Last).Ecol
295 -- Otherwise we have a generic actual part (either a left paren is
296 -- present, or we have decided that there must be a missing left paren)
299 Association_List := New_List;
303 Append (P_Generic_Association, Association_List);
304 exit when not Comma_Present;
308 return Association_List;
311 end P_Generic_Actual_Part_Opt;
313 -------------------------------
314 -- 12.3 Generic Association --
315 -------------------------------
317 -- GENERIC_ASSOCIATION ::=
318 -- [generic_formal_parameter_SELECTOR_NAME =>]
319 -- EXPLICIT_GENERIC_ACTUAL_PARAMETER
321 -- EXPLICIT_GENERIC_ACTUAL_PARAMETER ::=
322 -- EXPRESSION | variable_NAME | subprogram_NAME
323 -- | entry_NAME | SUBTYPE_MARK | package_instance_NAME
325 -- Error recovery: cannot raise Error_Resync
327 function P_Generic_Association return Node_Id is
328 Scan_State : Saved_Scan_State;
329 Param_Name_Node : Node_Id;
330 Generic_Assoc_Node : Node_Id;
333 Generic_Assoc_Node := New_Node (N_Generic_Association, Token_Ptr);
335 if Token in Token_Class_Desig then
336 Param_Name_Node := Token_Node;
337 Save_Scan_State (Scan_State); -- at designator
338 Scan; -- past simple name or operator symbol
340 if Token = Tok_Arrow then
342 Set_Selector_Name (Generic_Assoc_Node, Param_Name_Node);
344 Restore_Scan_State (Scan_State); -- to designator
348 Set_Explicit_Generic_Actual_Parameter (Generic_Assoc_Node, P_Expression);
349 return Generic_Assoc_Node;
350 end P_Generic_Association;
352 ---------------------------------------------
353 -- 12.3 Explicit Generic Actual Parameter --
354 ---------------------------------------------
356 -- Parsed by P_Generic_Association (12.3)
358 --------------------------------------
359 -- 12.4 Formal Object Declarations --
360 --------------------------------------
362 -- FORMAL_OBJECT_DECLARATION ::=
363 -- DEFINING_IDENTIFIER_LIST :
364 -- MODE SUBTYPE_MARK [:= DEFAULT_EXPRESSION];
366 -- The caller has checked that the initial token is an identifier
368 -- Error recovery: cannot raise Error_Resync
370 procedure P_Formal_Object_Declarations (Decls : List_Id) is
372 Scan_State : Saved_Scan_State;
376 Idents : array (Int range 1 .. 4096) of Entity_Id;
377 -- This array holds the list of defining identifiers. The upper bound
378 -- of 4096 is intended to be essentially infinite, and we do not even
379 -- bother to check for it being exceeded.
382 Idents (1) := P_Defining_Identifier (C_Comma_Colon);
385 while Comma_Present loop
386 Num_Idents := Num_Idents + 1;
387 Idents (Num_Idents) := P_Defining_Identifier (C_Comma_Colon);
392 -- If there are multiple identifiers, we repeatedly scan the
393 -- type and initialization expression information by resetting
394 -- the scan pointer (so that we get completely separate trees
395 -- for each occurrence).
397 if Num_Idents > 1 then
398 Save_Scan_State (Scan_State);
401 -- Loop through defining identifiers in list
405 Decl_Node := New_Node (N_Formal_Object_Declaration, Token_Ptr);
406 Set_Defining_Identifier (Decl_Node, Idents (Ident));
408 Set_Subtype_Mark (Decl_Node, P_Subtype_Mark_Resync);
410 Set_Expression (Decl_Node, Init_Expr_Opt);
413 Set_Prev_Ids (Decl_Node, True);
416 if Ident < Num_Idents then
417 Set_More_Ids (Decl_Node, True);
420 Append (Decl_Node, Decls);
422 exit Ident_Loop when Ident = Num_Idents;
424 Restore_Scan_State (Scan_State);
428 end P_Formal_Object_Declarations;
430 -----------------------------------
431 -- 12.5 Formal Type Declaration --
432 -----------------------------------
434 -- FORMAL_TYPE_DECLARATION ::=
435 -- type DEFINING_IDENTIFIER [DISCRIMINANT_PART]
436 -- is FORMAL_TYPE_DEFINITION;
438 -- The caller has checked that the initial token is TYPE
440 -- Error recovery: cannot raise Error_Resync
442 function P_Formal_Type_Declaration return Node_Id is
447 Decl_Node := New_Node (N_Formal_Type_Declaration, Token_Ptr);
449 Set_Defining_Identifier (Decl_Node, P_Defining_Identifier);
451 if P_Unknown_Discriminant_Part_Opt then
452 Set_Unknown_Discriminants_Present (Decl_Node, True);
454 Set_Discriminant_Specifications
455 (Decl_Node, P_Known_Discriminant_Part_Opt);
460 Def_Node := P_Formal_Type_Definition;
462 if Def_Node /= Error then
463 Set_Formal_Type_Definition (Decl_Node, Def_Node);
469 -- If we have semicolon, skip it to avoid cascaded errors
471 if Token = Tok_Semicolon then
477 end P_Formal_Type_Declaration;
479 ----------------------------------
480 -- 12.5 Formal Type Definition --
481 ----------------------------------
483 -- FORMAL_TYPE_DEFINITION ::=
484 -- FORMAL_PRIVATE_TYPE_DEFINITION
485 -- | FORMAL_DERIVED_TYPE_DEFINITION
486 -- | FORMAL_DISCRETE_TYPE_DEFINITION
487 -- | FORMAL_SIGNED_INTEGER_TYPE_DEFINITION
488 -- | FORMAL_MODULAR_TYPE_DEFINITION
489 -- | FORMAL_FLOATING_POINT_DEFINITION
490 -- | FORMAL_ORDINARY_FIXED_POINT_DEFINITION
491 -- | FORMAL_DECIMAL_FIXED_POINT_DEFINITION
492 -- | FORMAL_ARRAY_TYPE_DEFINITION
493 -- | FORMAL_ACCESS_TYPE_DEFINITION
494 -- | FORMAL_INTERFACE_TYPE_DEFINITION
496 -- FORMAL_ARRAY_TYPE_DEFINITION ::= ARRAY_TYPE_DEFINITION
498 -- FORMAL_ACCESS_TYPE_DEFINITION ::= ACCESS_TYPE_DEFINITION
500 -- FORMAL_INTERFACE_TYPE_DEFINITION ::= INTERFACE_TYPE_DEFINITION
502 function P_Formal_Type_Definition return Node_Id is
503 Scan_State : Saved_Scan_State;
504 Typedef_Node : Node_Id;
507 if Token_Name = Name_Abstract then
508 Check_95_Keyword (Tok_Abstract, Tok_Tagged);
511 if Token_Name = Name_Tagged then
512 Check_95_Keyword (Tok_Tagged, Tok_Private);
513 Check_95_Keyword (Tok_Tagged, Tok_Limited);
518 -- Mostly we can tell what we have from the initial token. The one
519 -- exception is ABSTRACT, where we have to scan ahead to see if we
520 -- have a formal derived type or a formal private type definition.
522 -- In addition, in Ada 2005 LIMITED may appear after abstract, so
523 -- that the lookahead must be extended by one more token.
526 Save_Scan_State (Scan_State);
527 Scan; -- past ABSTRACT
529 if Token = Tok_New then
530 Restore_Scan_State (Scan_State); -- to ABSTRACT
531 return P_Formal_Derived_Type_Definition;
533 elsif Token = Tok_Limited then
534 Scan; -- past LIMITED
536 if Token = Tok_New then
537 Restore_Scan_State (Scan_State); -- to ABSTRACT
538 return P_Formal_Derived_Type_Definition;
541 Restore_Scan_State (Scan_State); -- to ABSTRACT
542 return P_Formal_Private_Type_Definition;
546 Restore_Scan_State (Scan_State); -- to ABSTRACT
547 return P_Formal_Private_Type_Definition;
551 return P_Access_Type_Definition;
554 return P_Array_Type_Definition;
557 return P_Formal_Fixed_Point_Definition;
560 return P_Formal_Floating_Point_Definition;
562 when Tok_Interface => -- Ada 2005 (AI-251)
563 return P_Interface_Type_Definition (Is_Synchronized => False);
565 when Tok_Left_Paren =>
566 return P_Formal_Discrete_Type_Definition;
569 Save_Scan_State (Scan_State);
570 Scan; -- past LIMITED
572 if Token = Tok_Interface then
573 Typedef_Node := P_Interface_Type_Definition
574 (Is_Synchronized => False);
575 Set_Limited_Present (Typedef_Node);
578 elsif Token = Tok_New then
579 Restore_Scan_State (Scan_State); -- to LIMITED
580 return P_Formal_Derived_Type_Definition;
583 if Token = Tok_Abstract then
584 Error_Msg_SC ("ABSTRACT must come before LIMITED");
585 Scan; -- past improper ABSTRACT
587 if Token = Tok_New then
588 Restore_Scan_State (Scan_State); -- to LIMITED
589 return P_Formal_Derived_Type_Definition;
592 Restore_Scan_State (Scan_State);
593 return P_Formal_Private_Type_Definition;
597 Restore_Scan_State (Scan_State);
598 return P_Formal_Private_Type_Definition;
602 return P_Formal_Modular_Type_Definition;
605 return P_Formal_Derived_Type_Definition;
609 return P_Formal_Private_Type_Definition;
612 return P_Formal_Signed_Integer_Type_Definition;
615 Error_Msg_SC ("record not allowed in generic type definition!");
616 Discard_Junk_Node (P_Record_Definition);
625 Scan; -- past TASK, PROTECTED or SYNCHRONIZED
628 Saved_Token : constant Token_Type := Token;
631 Typedef_Node := P_Interface_Type_Definition
632 (Is_Synchronized => True);
636 Set_Task_Present (Typedef_Node);
638 when Tok_Protected =>
639 Set_Protected_Present (Typedef_Node);
641 when Tok_Synchronized =>
642 Set_Synchronized_Present (Typedef_Node);
652 Error_Msg_BC ("expecting generic type definition here");
653 Resync_Past_Semicolon;
657 end P_Formal_Type_Definition;
659 --------------------------------------------
660 -- 12.5.1 Formal Private Type Definition --
661 --------------------------------------------
663 -- FORMAL_PRIVATE_TYPE_DEFINITION ::=
664 -- [[abstract] tagged] [limited] private
666 -- The caller has checked the initial token is PRIVATE, ABSTRACT,
669 -- Error recovery: cannot raise Error_Resync
671 function P_Formal_Private_Type_Definition return Node_Id is
675 Def_Node := New_Node (N_Formal_Private_Type_Definition, Token_Ptr);
677 if Token = Tok_Abstract then
678 Scan; -- past ABSTRACT
680 if Token_Name = Name_Tagged then
681 Check_95_Keyword (Tok_Tagged, Tok_Private);
682 Check_95_Keyword (Tok_Tagged, Tok_Limited);
685 if Token /= Tok_Tagged then
686 Error_Msg_SP ("ABSTRACT must be followed by TAGGED");
688 Set_Abstract_Present (Def_Node, True);
692 if Token = Tok_Tagged then
693 Set_Tagged_Present (Def_Node, True);
697 if Token = Tok_Limited then
698 Set_Limited_Present (Def_Node, True);
699 Scan; -- past LIMITED
702 if Token = Tok_Abstract then
703 if Prev_Token = Tok_Tagged then
704 Error_Msg_SC ("ABSTRACT must come before TAGGED");
705 elsif Prev_Token = Tok_Limited then
706 Error_Msg_SC ("ABSTRACT must come before LIMITED");
709 Resync_Past_Semicolon;
711 elsif Token = Tok_Tagged then
712 Error_Msg_SC ("TAGGED must come before LIMITED");
713 Resync_Past_Semicolon;
716 Set_Sloc (Def_Node, Token_Ptr);
719 end P_Formal_Private_Type_Definition;
721 --------------------------------------------
722 -- 12.5.1 Formal Derived Type Definition --
723 --------------------------------------------
725 -- FORMAL_DERIVED_TYPE_DEFINITION ::=
726 -- [abstract] [limited]
727 -- new SUBTYPE_MARK [[AND interface_list] with private]
729 -- The caller has checked the initial token(s) is/are NEW, ASTRACT NEW
730 -- LIMITED NEW, or ABSTRACT LIMITED NEW
732 -- Error recovery: cannot raise Error_Resync
734 function P_Formal_Derived_Type_Definition return Node_Id is
738 Def_Node := New_Node (N_Formal_Derived_Type_Definition, Token_Ptr);
740 if Token = Tok_Abstract then
741 Set_Abstract_Present (Def_Node);
742 Scan; -- past ABSTRACT
745 if Token = Tok_Limited then
746 Set_Limited_Present (Def_Node);
747 Scan; -- past Limited
749 if Ada_Version < Ada_05 then
751 ("LIMITED in derived type is an Ada 2005 extension");
753 ("\unit must be compiled with -gnat05 switch");
756 if Token = Tok_Abstract then
757 Scan; -- past ABSTRACT. diagnosed already in caller.
762 Set_Subtype_Mark (Def_Node, P_Subtype_Mark);
765 -- Ada 2005 (AI-251): Deal with interfaces
767 if Token = Tok_And then
770 if Ada_Version < Ada_05 then
772 ("abstract interface is an Ada 2005 extension");
773 Error_Msg_SP ("\unit must be compiled with -gnat05 switch");
776 Set_Interface_List (Def_Node, New_List);
779 Append (P_Qualified_Simple_Name, Interface_List (Def_Node));
780 exit when Token /= Tok_And;
785 if Token = Tok_With then
787 Set_Private_Present (Def_Node, True);
790 elsif Token = Tok_Tagged then
793 if Token = Tok_Private then
794 Error_Msg_SC ("TAGGED should be WITH");
795 Set_Private_Present (Def_Node, True);
803 end P_Formal_Derived_Type_Definition;
805 ---------------------------------------------
806 -- 12.5.2 Formal Discrete Type Definition --
807 ---------------------------------------------
809 -- FORMAL_DISCRETE_TYPE_DEFINITION ::= (<>)
811 -- The caller has checked the initial token is left paren
813 -- Error recovery: cannot raise Error_Resync
815 function P_Formal_Discrete_Type_Definition return Node_Id is
819 Def_Node := New_Node (N_Formal_Discrete_Type_Definition, Token_Ptr);
820 Scan; -- past left paren
824 end P_Formal_Discrete_Type_Definition;
826 ---------------------------------------------------
827 -- 12.5.2 Formal Signed Integer Type Definition --
828 ---------------------------------------------------
830 -- FORMAL_SIGNED_INTEGER_TYPE_DEFINITION ::= range <>
832 -- The caller has checked the initial token is RANGE
834 -- Error recovery: cannot raise Error_Resync
836 function P_Formal_Signed_Integer_Type_Definition return Node_Id is
841 New_Node (N_Formal_Signed_Integer_Type_Definition, Token_Ptr);
845 end P_Formal_Signed_Integer_Type_Definition;
847 --------------------------------------------
848 -- 12.5.2 Formal Modular Type Definition --
849 --------------------------------------------
851 -- FORMAL_MODULAR_TYPE_DEFINITION ::= mod <>
853 -- The caller has checked the initial token is MOD
855 -- Error recovery: cannot raise Error_Resync
857 function P_Formal_Modular_Type_Definition return Node_Id is
862 New_Node (N_Formal_Modular_Type_Definition, Token_Ptr);
866 end P_Formal_Modular_Type_Definition;
868 ----------------------------------------------
869 -- 12.5.2 Formal Floating Point Definition --
870 ----------------------------------------------
872 -- FORMAL_FLOATING_POINT_DEFINITION ::= digits <>
874 -- The caller has checked the initial token is DIGITS
876 -- Error recovery: cannot raise Error_Resync
878 function P_Formal_Floating_Point_Definition return Node_Id is
883 New_Node (N_Formal_Floating_Point_Definition, Token_Ptr);
887 end P_Formal_Floating_Point_Definition;
889 -------------------------------------------
890 -- 12.5.2 Formal Fixed Point Definition --
891 -------------------------------------------
893 -- This routine parses either a formal ordinary fixed point definition
894 -- or a formal decimal fixed point definition:
896 -- FORMAL_ORDINARY_FIXED_POINT_DEFINITION ::= delta <>
898 -- FORMAL_DECIMAL_FIXED_POINT_DEFINITION ::= delta <> digits <>
900 -- The caller has checked the initial token is DELTA
902 -- Error recovery: cannot raise Error_Resync
904 function P_Formal_Fixed_Point_Definition return Node_Id is
906 Delta_Sloc : Source_Ptr;
909 Delta_Sloc := Token_Ptr;
913 if Token = Tok_Digits then
915 New_Node (N_Formal_Decimal_Fixed_Point_Definition, Delta_Sloc);
920 New_Node (N_Formal_Ordinary_Fixed_Point_Definition, Delta_Sloc);
924 end P_Formal_Fixed_Point_Definition;
926 ----------------------------------------------------
927 -- 12.5.2 Formal Ordinary Fixed Point Definition --
928 ----------------------------------------------------
930 -- Parsed by P_Formal_Fixed_Point_Definition (12.5.2)
932 ---------------------------------------------------
933 -- 12.5.2 Formal Decimal Fixed Point Definition --
934 ---------------------------------------------------
936 -- Parsed by P_Formal_Fixed_Point_Definition (12.5.2)
938 ------------------------------------------
939 -- 12.5.3 Formal Array Type Definition --
940 ------------------------------------------
942 -- Parsed by P_Formal_Type_Definition (12.5)
944 -------------------------------------------
945 -- 12.5.4 Formal Access Type Definition --
946 -------------------------------------------
948 -- Parsed by P_Formal_Type_Definition (12.5)
950 -----------------------------------------
951 -- 12.6 Formal Subprogram Declaration --
952 -----------------------------------------
954 -- FORMAL_SUBPROGRAM_DECLARATION ::=
955 -- FORMAL_CONCRETE_SUBPROGRAM_DECLARATION
956 -- | FORMAL_ABSTRACT_SUBPROGRAM_DECLARATION
958 -- FORMAL_CONCRETE_SUBPROGRAM_DECLARATION ::=
959 -- with SUBPROGRAM_SPECIFICATION [is SUBPROGRAM_DEFAULT];
961 -- FORMAL_ABSTRACT_SUBPROGRAM_DECLARATION ::=
962 -- with SUBPROGRAM_SPECIFICATION is abstract [SUBPROGRAM_DEFAULT];
964 -- SUBPROGRAM_DEFAULT ::= DEFAULT_NAME | <>
966 -- DEFAULT_NAME ::= NAME | null
968 -- The caller has checked that the initial tokens are WITH FUNCTION or
969 -- WITH PROCEDURE, and the initial WITH has been scanned out.
971 -- A null default is an Ada 2005 feature
973 -- Error recovery: cannot raise Error_Resync
975 function P_Formal_Subprogram_Declaration return Node_Id is
976 Prev_Sloc : constant Source_Ptr := Prev_Token_Ptr;
977 Spec_Node : constant Node_Id := P_Subprogram_Specification;
981 if Token = Tok_Is then
982 T_Is; -- past IS, skip extra IS or ";"
984 if Token = Tok_Abstract then
986 New_Node (N_Formal_Abstract_Subprogram_Declaration, Prev_Sloc);
987 Scan; -- past ABSTRACT
989 if Ada_Version < Ada_05 then
991 ("formal abstract subprograms are an Ada 2005 extension");
992 Error_Msg_SP ("\unit must be compiled with -gnat05 switch");
997 New_Node (N_Formal_Concrete_Subprogram_Declaration, Prev_Sloc);
1000 Set_Specification (Def_Node, Spec_Node);
1002 if Token = Tok_Semicolon then
1005 elsif Token = Tok_Box then
1006 Set_Box_Present (Def_Node, True);
1010 elsif Token = Tok_Null then
1011 if Ada_Version < Ada_05 then
1013 ("null default subprograms are an Ada 2005 extension");
1014 Error_Msg_SP ("\unit must be compiled with -gnat05 switch");
1017 if Nkind (Spec_Node) = N_Procedure_Specification then
1018 Set_Null_Present (Spec_Node);
1020 Error_Msg_SP ("only procedures can be null");
1027 Set_Default_Name (Def_Node, P_Name);
1033 New_Node (N_Formal_Concrete_Subprogram_Declaration, Prev_Sloc);
1034 Set_Specification (Def_Node, Spec_Node);
1039 end P_Formal_Subprogram_Declaration;
1041 ------------------------------
1042 -- 12.6 Subprogram Default --
1043 ------------------------------
1045 -- Parsed by P_Formal_Procedure_Declaration (12.6)
1047 ------------------------
1048 -- 12.6 Default Name --
1049 ------------------------
1051 -- Parsed by P_Formal_Procedure_Declaration (12.6)
1053 --------------------------------------
1054 -- 12.7 Formal Package Declaration --
1055 --------------------------------------
1057 -- FORMAL_PACKAGE_DECLARATION ::=
1058 -- with package DEFINING_IDENTIFIER
1059 -- is new generic_package_NAME FORMAL_PACKAGE_ACTUAL_PART;
1061 -- FORMAL_PACKAGE_ACTUAL_PART ::=
1062 -- (<>) | [GENERIC_ACTUAL_PART]
1064 -- The caller has checked that the initial tokens are WITH PACKAGE,
1065 -- and the initial WITH has been scanned out (so Token = Tok_Package).
1067 -- Error recovery: cannot raise Error_Resync
1069 function P_Formal_Package_Declaration return Node_Id is
1071 Scan_State : Saved_Scan_State;
1074 Def_Node := New_Node (N_Formal_Package_Declaration, Prev_Token_Ptr);
1075 Scan; -- past PACKAGE
1076 Set_Defining_Identifier (Def_Node, P_Defining_Identifier (C_Is));
1079 Set_Name (Def_Node, P_Qualified_Simple_Name);
1081 if Token = Tok_Left_Paren then
1082 Save_Scan_State (Scan_State); -- at the left paren
1083 Scan; -- past the left paren
1085 if Token = Tok_Box then
1086 Set_Box_Present (Def_Node, True);
1091 Restore_Scan_State (Scan_State); -- to the left paren
1092 Set_Generic_Associations (Def_Node, P_Generic_Actual_Part_Opt);
1098 end P_Formal_Package_Declaration;
1100 --------------------------------------
1101 -- 12.7 Formal Package Actual Part --
1102 --------------------------------------
1104 -- Parsed by P_Formal_Package_Declaration (12.7)