Geek Gadgets 1

home *** CD-ROM | disk | FTP | other *** search

/ Geek Gadgets 1 / ADE-1.bin / ade-dist / gnat-2.06-src.tgz / tar.out / fsf / gnat / ada / par-ch12.adb < prev next >

Wrap

Text File | 1996-09-28 | 29KB | 896 lines

------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- P A R . C H 1 2 -- -- -- -- B o d y -- -- -- -- $Revision: 1.36 $ -- -- -- -- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 2, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. -- -- -- ------------------------------------------------------------------------------ separate (Par) package body Ch12 is -- Local functions, used only in this chapter function P_Formal_Derived_Type_Definition return Node_Id; function P_Formal_Discrete_Type_Definition return Node_Id; function P_Formal_Fixed_Point_Definition return Node_Id; function P_Formal_Floating_Point_Definition return Node_Id; function P_Formal_Function_Declaration return Node_Id; function P_Formal_Modular_Type_Definition return Node_Id; function P_Formal_Package_Declaration return Node_Id; function P_Formal_Private_Type_Definition return Node_Id; function P_Formal_Procedure_Declaration return Node_Id; function P_Formal_Signed_Integer_Type_Definition return Node_Id; function P_Formal_Type_Declaration return Node_Id; function P_Formal_Type_Definition return Node_Id; function P_Generic_Association return Node_Id; procedure P_Formal_Object_Declarations (Decls : List_Id); -- Scans one or more formal object declarations and appends them to -- Decls. Scans more than one declaration only in the case where the -- source has a declaration with multiple defining identifiers. -------------------------------- -- 12.1 Generic (also 8.5.5) -- -------------------------------- -- This routine parses either one of the forms of a generic declaration -- or a generic renaming declaration. -- GENERIC_DECLARATION ::= -- GENERIC_SUBPROGRAM_DECLARATION | GENERIC_PACKAGE_DECLARATION -- GENERIC_SUBPROGRAM_DECLARATION ::= -- GENERIC_FORMAL_PART SUBPROGRAM_SPECIFICATION; -- GENERIC_PACKAGE_DECLARATION ::= -- GENERIC_FORMAL_PART PACKAGE_SPECIFICATION; -- GENERIC_FORMAL_PART ::= -- generic {GENERIC_FORMAL_PARAMETER_DECLARATION | USE_CLAUSE} -- GENERIC_RENAMING_DECLARATION ::= -- generic package DEFINING_PROGRAM_UNIT_NAME -- renames generic_package_NAME -- | generic procedure DEFINING_PROGRAM_UNIT_NAME -- renames generic_procedure_NAME -- | generic function DEFINING_PROGRAM_UNIT_NAME -- renames generic_function_NAME -- GENERIC_FORMAL_PARAMETER_DECLARATION ::= -- FORMAL_OBJECT_DECLARATION -- | FORMAL_TYPE_DECLARATION -- | FORMAL_SUBPROGRAM_DECLARATION -- | FORMAL_PACKAGE_DECLARATION -- The caller has checked that the initial token is GENERIC -- Error recovery: can raise Error_Resync function P_Generic return Node_Id is Gen_Sloc : constant Source_Ptr := Token_Ptr; Gen_Decl : Node_Id; Decl_Node : Node_Id; Decls : List_Id; Def_Unit : Node_Id; Ren_Token : Token_Type; Scan_State : Saved_Scan_State; begin Scan; -- past GENERIC Save_Scan_State (Scan_State); -- at token past GENERIC -- Check for generic renaming declaration case if Token = Tok_Package or else Token = Tok_Function or else Token = Tok_Procedure then Ren_Token := Token; Scan; -- scan past PACKAGE, FUNCTION or PROCEDURE if Token = Tok_Identifier then Def_Unit := P_Defining_Program_Unit_Name; if Token = Tok_Renames then if Ren_Token = Tok_Package then Decl_Node := New_Node (N_Generic_Package_Renaming_Declaration, Gen_Sloc); elsif Ren_Token = Tok_Procedure then Decl_Node := New_Node (N_Generic_Procedure_Renaming_Declaration, Gen_Sloc); else -- Ren_Token = Tok_Function then Decl_Node := New_Node (N_Generic_Function_Renaming_Declaration, Gen_Sloc); end if; Scan; -- past RENAMES Set_Defining_Unit_Name (Decl_Node, Def_Unit); Set_Name (Decl_Node, P_Name); TF_Semicolon; return Decl_Node; end if; end if; end if; -- Fall through if this is *not* a generic renaming declaration Restore_Scan_State (Scan_State); Decls := New_List; -- Loop through generic parameter declarations and use clauses Decl_Loop : loop if Token = Tok_Use then Append (P_Use_Clause, Decls); else -- Parse a generic parameter declaration if Token = Tok_Identifier then P_Formal_Object_Declarations (Decls); elsif Token = Tok_Type then Append (P_Formal_Type_Declaration, Decls); elsif Token = Tok_With then Scan; -- past WITH if Token = Tok_Package then Append (P_Formal_Package_Declaration, Decls); elsif Token = Tok_Procedure then Append (P_Formal_Procedure_Declaration, Decls); elsif Token = Tok_Function then Append (P_Formal_Function_Declaration, Decls); else Error_Msg_BC ("FUNCTION, PROCEDURE or PACKAGE expected here"); Resync_Past_Semicolon; end if; elsif Token = Tok_Subtype then Error_Msg_SC ("subtype declaration not allowed " & "as generic parameter declaration!"); Resync_Past_Semicolon; else exit Decl_Loop; end if; end if; end loop Decl_Loop; -- Generic formal part is scanned, scan out subprogram or package spec if Token = Tok_Package then Gen_Decl := New_Node (N_Generic_Package_Declaration, Gen_Sloc); Set_Specification (Gen_Decl, P_Package (Pf_Spcn)); else Gen_Decl := New_Node (N_Generic_Subprogram_Declaration, Gen_Sloc); Set_Specification (Gen_Decl, P_Subprogram_Specification); TF_Semicolon; end if; Set_Generic_Formal_Declarations (Gen_Decl, Decls); return Gen_Decl; end P_Generic; ------------------------------- -- 12.1 Generic Declaration -- ------------------------------- -- Parsed by P_Generic (12.1) ------------------------------------------ -- 12.1 Generic Subprogram Declaration -- ------------------------------------------ -- Parsed by P_Generic (12.1) --------------------------------------- -- 12.1 Generic Package Declaration -- --------------------------------------- -- Parsed by P_Generic (12.1) ------------------------------- -- 12.1 Generic Formal Part -- ------------------------------- -- Parsed by P_Generic (12.1) ------------------------------------------------- -- 12.1 Generic Formal Parameter Declaration -- ------------------------------------------------- -- Parsed by P_Generic (12.1) --------------------------------- -- 12.3 Generic Instantiation -- --------------------------------- -- Generic package instantiation parsed by P_Package (7.1) -- Generic procedure instantiation parsed by P_Subprogram (6.1) -- Generic function instantiation parsed by P_Subprogram (6.1) ------------------------------- -- 12.3 Generic Actual Part -- ------------------------------- -- GENERIC_ACTUAL_PART ::= -- (GENERIC_ASSOCIATION {, GENERIC_ASSOCIATION}) -- Returns a list of generic associations, or Empty if none are present -- Error recovery: cannot raise Error_Resync function P_Generic_Actual_Part_Opt return List_Id is Association_List : List_Id; begin -- Figure out if a generic actual part operation is present. Clearly -- there is no generic actual part if the current token is semicolon if Token = Tok_Semicolon then return No_List; -- If we don't have a left paren, then we have an error, and the job -- is to figure out whether a left paren or semicolon was intended. -- We assume a missing left paren (and hence a generic actual part -- present) if the current token is not on a new line, or if it is -- indented from the subprogram token. Otherwise assume missing -- semicolon (which will be diagnosed by caller) and no generic part elsif Token /= Tok_Left_Paren and then Token_Is_At_Start_Of_Line and then Start_Column <= Scope.Table (Scope.Last).Ecol then return No_List; -- Otherwise we have a generic actual part (either a left paren is -- present, or we have decided that there must be a missing left paren) else Association_List := New_List; T_Left_Paren; loop Append (P_Generic_Association, Association_List); exit when not Comma_Present; end loop; T_Right_Paren; return Association_List; end if; end P_Generic_Actual_Part_Opt; ------------------------------- -- 12.3 Generic Association -- ------------------------------- -- GENERIC_ASSOCIATION ::= -- [generic_formal_parameter_SELECTOR_NAME =>] -- EXPLICIT_GENERIC_ACTUAL_PARAMETER -- EXPLICIT_GENERIC_ACTUAL_PARAMETER ::= -- EXPRESSION | variable_NAME | subprogram_NAME -- | entry_NAME | SUBTYPE_MARK | package_instance_NAME -- Error recovery: cannot raise Error_Resync function P_Generic_Association return Node_Id is Scan_State : Saved_Scan_State; Param_Name_Node : Node_Id; Generic_Assoc_Node : Node_Id; begin Generic_Assoc_Node := New_Node (N_Generic_Association, Token_Ptr); if Token in Token_Class_Desig then Param_Name_Node := Token_Node; Save_Scan_State (Scan_State); -- at designator Scan; -- past simple name or operator symbol if Token = Tok_Arrow then Scan; -- past arrow Set_Selector_Name (Generic_Assoc_Node, Param_Name_Node); else Restore_Scan_State (Scan_State); -- to designator end if; end if; Set_Explicit_Generic_Actual_Parameter (Generic_Assoc_Node, P_Expression); return Generic_Assoc_Node; end P_Generic_Association; --------------------------------------------- -- 12.3 Explicit Generic Actual Parameter -- --------------------------------------------- -- Parsed by P_Generic_Association (12.3) -------------------------------------- -- 12.4 Formal Object Declarations -- -------------------------------------- -- FORMAL_OBJECT_DECLARATION ::= -- DEFINING_IDENTIFIER_LIST : -- MODE SUBTYPE_MARK [:= DEFAULT_EXPRESSION]; -- The caller has checked that the initial token is an identifier -- Error recovery: cannot raise Error_Resync procedure P_Formal_Object_Declarations (Decls : List_Id) is Decl_Node : Node_Id; Scan_State : Saved_Scan_State; Num_Idents : Nat; Ident : Nat; Idents : array (Int range 1 .. 4096) of Entity_Id; -- This array holds the list of defining identifiers. The upper bound -- of 4096 is intended to be essentially infinite, and we do not even -- bother to check for it being exceeded. begin Idents (1) := P_Defining_Identifier; Num_Idents := 1; while Comma_Present loop Num_Idents := Num_Idents + 1; Idents (Num_Idents) := P_Defining_Identifier; end loop; T_Colon; -- If there are multiple identifiers, we repeatedly scan the -- type and initialization expression information by resetting -- the scan pointer (so that we get completely separate trees -- for each occurrence). if Num_Idents > 1 then Save_Scan_State (Scan_State); end if; -- Loop through defining identifiers in list Ident := 1; Ident_Loop : loop Decl_Node := New_Node (N_Formal_Object_Declaration, Token_Ptr); Set_Defining_Identifier (Decl_Node, Idents (Ident)); P_Mode (Decl_Node); Set_Subtype_Mark (Decl_Node, P_Subtype_Mark_Resync); No_Constraint; Set_Expression (Decl_Node, Init_Expr_Opt); if Ident > 1 then Set_Prev_Ids (Decl_Node, True); end if; if Ident < Num_Idents then Set_More_Ids (Decl_Node, True); end if; Append (Decl_Node, Decls); exit Ident_Loop when Ident = Num_Idents; Ident := Ident + 1; Restore_Scan_State (Scan_State); end loop Ident_Loop; TF_Semicolon; end P_Formal_Object_Declarations; ----------------------------------- -- 12.5 Formal Type Declaration -- ----------------------------------- -- FORMAL_TYPE_DECLARATION ::= -- type DEFINING_IDENTIFIER [DISCRIMINANT_PART] -- is FORMAL_TYPE_DEFINITION; -- The caller has checked that the initial token is TYPE -- Error recovery: cannot raise Error_Resync function P_Formal_Type_Declaration return Node_Id is Decl_Node : Node_Id; Discr_Part : Node_Id; begin Decl_Node := New_Node (N_Formal_Type_Declaration, Token_Ptr); Scan; -- past TYPE Set_Defining_Identifier (Decl_Node, P_Defining_Identifier); if P_Unknown_Discriminant_Part_Opt then Set_Unknown_Discriminants_Present (Decl_Node, True); else Set_Discriminant_Specifications (Decl_Node, P_Known_Discriminant_Part_Opt); end if; T_Is; Set_Formal_Type_Definition (Decl_Node, P_Formal_Type_Definition); TF_Semicolon; return Decl_Node; end P_Formal_Type_Declaration; ---------------------------------- -- 12.5 Formal Type Definition -- ---------------------------------- -- FORMAL_TYPE_DEFINITION ::= -- FORMAL_PRIVATE_TYPE_DEFINITION -- | FORMAL_DERIVED_TYPE_DEFINITION -- | FORMAL_DISCRETE_TYPE_DEFINITION -- | FORMAL_SIGNED_INTEGER_TYPE_DEFINITION -- | FORMAL_MODULAR_TYPE_DEFINITION -- | FORMAL_FLOATING_POINT_DEFINITION -- | FORMAL_ORDINARY_FIXED_POINT_DEFINITION -- | FORMAL_DECIMAL_FIXED_POINT_DEFINITION -- | FORMAL_ARRAY_TYPE_DEFINITION -- | FORMAL_ACCESS_TYPE_DEFINITION -- FORMAL_ARRAY_TYPE_DEFINITION ::= ARRAY_TYPE_DEFINITION -- FORMAL_ACCESS_TYPE_DEFINITION ::= ACCESS_TYPE_DEFINITION function P_Formal_Type_Definition return Node_Id is Scan_State : Saved_Scan_State; begin if Token_Name = Name_Abstract then Check_95_Keyword (Tok_Abstract, Tok_Tagged); end if; if Token_Name = Name_Tagged then Check_95_Keyword (Tok_Tagged, Tok_Private); Check_95_Keyword (Tok_Tagged, Tok_Limited); end if; case Token is -- Mostly we can tell what we have from the initial token. The one -- exception is ABSTRACT, where we have to scan ahead to see if we -- have a formal derived type or a formal private type definition. when Tok_Abstract => Note_Feature (Abstract_Types, Token_Ptr); Save_Scan_State (Scan_State); Scan; -- past ABSTRACT if Token = Tok_New then Restore_Scan_State (Scan_State); -- to ABSTRACT return P_Formal_Derived_Type_Definition; else Restore_Scan_State (Scan_State); -- to ABSTRACT return P_Formal_Private_Type_Definition; end if; when Tok_Private | Tok_Limited | Tok_Tagged => return P_Formal_Private_Type_Definition; when Tok_New => return P_Formal_Derived_Type_Definition; when Tok_Left_Paren => return P_Formal_Discrete_Type_Definition; when Tok_Range => return P_Formal_Signed_Integer_Type_Definition; when Tok_Mod => return P_Formal_Modular_Type_Definition; when Tok_Digits => return P_Formal_Floating_Point_Definition; when Tok_Delta => return P_Formal_Fixed_Point_Definition; when Tok_Array => return P_Array_Type_Definition; when Tok_Access => return P_Access_Type_Definition; when Tok_Record => Error_Msg_SC ("record not allowed in generic type definition!"); Discard_Junk_Node (P_Record_Definition); return Error; when others => Error_Msg_BC ("expecting generic type definition here"); Resync_Past_Semicolon; return Error; end case; end P_Formal_Type_Definition; -------------------------------------------- -- 12.5.1 Formal Private Type Definition -- -------------------------------------------- -- FORMAL_PRIVATE_TYPE_DEFINITION ::= -- [[abstract] tagged] [limited] private -- The caller has checked the initial token is PRIVATE, ABSTRACT, -- TAGGED or LIMITED -- Error recovery: cannot raise Error_Resync function P_Formal_Private_Type_Definition return Node_Id is Def_Node : Node_Id; begin Def_Node := New_Node (N_Formal_Private_Type_Definition, Token_Ptr); if Token = Tok_Abstract then Note_Feature (Generic_Formal_Private_Types, Token_Ptr); Scan; -- past ABSTRACT if Token_Name = Name_Tagged then Check_95_Keyword (Tok_Tagged, Tok_Private); Check_95_Keyword (Tok_Tagged, Tok_Limited); end if; if Token /= Tok_Tagged then Error_Msg_SP ("ABSTRACT must be followed by TAGGED"); else Set_Abstract_Present (Def_Node, True); end if; end if; if Token = Tok_Tagged then Note_Feature (Generic_Formal_Private_Types, Token_Ptr); Note_Feature (Tagged_Types, Token_Ptr); Set_Tagged_Present (Def_Node, True); Scan; -- past TAGGED end if; if Token = Tok_Limited then Set_Limited_Present (Def_Node, True); Scan; -- past LIMITED end if; Set_Sloc (Def_Node, Token_Ptr); T_Private; return Def_Node; end P_Formal_Private_Type_Definition; -------------------------------------------- -- 12.5.1 Formal Derived Type Definition -- -------------------------------------------- -- FORMAL_DERIVED_TYPE_DEFINITION ::= -- [abstract] new SUBTYPE_MARK [with private] -- The caller has checked the initial token(s) is/are NEW or ASTRACT NEW -- Error recovery: cannot raise Error_Resync function P_Formal_Derived_Type_Definition return Node_Id is Def_Node : Node_Id; begin Def_Node := New_Node (N_Formal_Derived_Type_Definition, Token_Ptr); if Token = Tok_Abstract then Set_Abstract_Present (Def_Node); Scan; -- past ABSTRACT end if; Scan; -- past NEW; Set_Subtype_Mark (Def_Node, P_Subtype_Mark); No_Constraint; if Token = Tok_With then Scan; -- past WITH Set_Private_Present (Def_Node, True); T_Private; end if; return Def_Node; end P_Formal_Derived_Type_Definition; --------------------------------------------- -- 12.5.2 Formal Discrete Type Definition -- --------------------------------------------- -- FORMAL_DISCRETE_TYPE_DEFINITION ::= (<>) -- The caller has checked the initial token is left paren -- Error recovery: cannot raise Error_Resync function P_Formal_Discrete_Type_Definition return Node_Id is Def_Node : Node_Id; begin Def_Node := New_Node (N_Formal_Discrete_Type_Definition, Token_Ptr); Note_Feature (Generic_Contract_Rules, Token_Ptr); Scan; -- past left paren T_Box; T_Right_Paren; return Def_Node; end P_Formal_Discrete_Type_Definition; --------------------------------------------------- -- 12.5.2 Formal Signed Integer Type Definition -- --------------------------------------------------- -- FORMAL_SIGNED_INTEGER_TYPE_DEFINITION ::= range <> -- The caller has checked the initial token is RANGE -- Error recovery: cannot raise Error_Resync function P_Formal_Signed_Integer_Type_Definition return Node_Id is Def_Node : Node_Id; begin Def_Node := New_Node (N_Formal_Signed_Integer_Type_Definition, Token_Ptr); Scan; -- past RANGE T_Box; return Def_Node; end P_Formal_Signed_Integer_Type_Definition; -------------------------------------------- -- 12.5.2 Formal Modular Type Definition -- -------------------------------------------- -- FORMAL_MODULAR_TYPE_DEFINITION ::= mod <> -- The caller has checked the initial token is MOD -- Error recovery: cannot raise Error_Resync function P_Formal_Modular_Type_Definition return Node_Id is Def_Node : Node_Id; begin Def_Node := New_Node (N_Formal_Modular_Type_Definition, Token_Ptr); Scan; -- past MOD T_Box; return Def_Node; end P_Formal_Modular_Type_Definition; ---------------------------------------------- -- 12.5.2 Formal Floating Point Definition -- ---------------------------------------------- -- FORMAL_FLOATING_POINT_DEFINITION ::= digits <> -- The caller has checked the initial token is DIGITS -- Error recovery: cannot raise Error_Resync function P_Formal_Floating_Point_Definition return Node_Id is Def_Node : Node_Id; begin Def_Node := New_Node (N_Formal_Floating_Point_Definition, Token_Ptr); Scan; -- past DIGITS T_Box; return Def_Node; end P_Formal_Floating_Point_Definition; ------------------------------------------- -- 12.5.2 Formal Fixed Point Definition -- ------------------------------------------- -- This routine parses either a formal ordinary fixed point definition -- or a formal decimal fixed point definition: -- FORMAL_ORDINARY_FIXED_POINT_DEFINITION ::= delta <> -- FORMAL_DECIMAL_FIXED_POINT_DEFINITION ::= delta <> digits <> -- The caller has checked the initial token is DELTA -- Error recovery: cannot raise Error_Resync function P_Formal_Fixed_Point_Definition return Node_Id is Def_Node : Node_Id; Delta_Sloc : Source_Ptr; begin Delta_Sloc := Token_Ptr; Scan; -- past DELTA T_Box; if Token = Tok_Digits then Def_Node := New_Node (N_Formal_Decimal_Fixed_Point_Definition, Delta_Sloc); Scan; -- past DIGITS T_Box; else Def_Node := New_Node (N_Formal_Ordinary_Fixed_Point_Definition, Delta_Sloc); end if; return Def_Node; end P_Formal_Fixed_Point_Definition; ---------------------------------------------------- -- 12.5.2 Formal Ordinary Fixed Point Definition -- ---------------------------------------------------- -- Parsed by P_Formal_Fixed_Point_Definition (12.5.2) --------------------------------------------------- -- 12.5.2 Formal Decimal Fixed Point Definition -- --------------------------------------------------- -- Parsed by P_Formal_Fixed_Point_Definition (12.5.2) ------------------------------------------ -- 12.5.3 Formal Array Type Definition -- ------------------------------------------ -- Parsed by P_Formal_Type_Definition (12.5) ------------------------------------------- -- 12.5.4 Formal Access Type Definition -- ------------------------------------------- -- Parsed by P_Formal_Type_Definition (12.5) ----------------------------------------- -- 12.6 Formal Subprogram Declaration -- ----------------------------------------- -- FORMAL_SUBPROGRAM_DECLARATION ::= -- with SUBPROGRAM_SPECIFICATION [is SUBPROGRAM_DEFAULT]; -- SUBPROGRAM_DEFAULT ::= DEFAULT_NAME | <> -- DEFAULT_NAME ::= NAME -- The caller has checked that the initial tokens are WITH FUNCTION or -- WITH PROCEDURE, and the initial WITH has been scanned out. -- Note: we separate this into two procedures because the name is allowed -- to be an operator symbol for a function, but not for a procedure. -- Error recovery: cannot raise Error_Resync function P_Formal_Function_Declaration return Node_Id is Def_Node : Node_Id; begin Def_Node := New_Node (N_Formal_Subprogram_Declaration, Prev_Token_Ptr); Set_Specification (Def_Node, P_Subprogram_Specification); if Token = Tok_Is then Scan; -- past IS if Token = Tok_Box then Set_Box_Present (Def_Node, True); Scan; -- past <> else Set_Default_Name (Def_Node, P_Name); end if; end if; T_Semicolon; return Def_Node; end P_Formal_Function_Declaration; function P_Formal_Procedure_Declaration return Node_Id is Def_Node : Node_Id; begin Def_Node := New_Node (N_Formal_Subprogram_Declaration, Prev_Token_Ptr); Set_Specification (Def_Node, P_Subprogram_Specification); if Token = Tok_Is then Scan; -- past IS if Token = Tok_Box then Set_Box_Present (Def_Node, True); Scan; -- past <> else Set_Default_Name (Def_Node, P_Qualified_Simple_Name); end if; end if; T_Semicolon; return Def_Node; end P_Formal_Procedure_Declaration; ------------------------------ -- 12.6 Subprogram Default -- ------------------------------ -- Parsed by P_Formal_Procedure_Declaration (12.6) ------------------------ -- 12.6 Default Name -- ------------------------ -- Parsed by P_Formal_Procedure_Declaration (12.6) -------------------------------------- -- 12.7 Formal Package Declaration -- -------------------------------------- -- FORMAL_PACKAGE_DECLARATION ::= -- with package DEFINING_IDENTIFIER -- is new generic_package_NAME FORMAL_PACKAGE_ACTUAL_PART; -- FORMAL_PACKAGE_ACTUAL_PART ::= -- (<>) | [GENERIC_ACTUAL_PART] -- The caller has checked that the initial tokens are WITH PACKAGE, -- and the initial WITH has been scanned out (so Token = Tok_Package). -- Error recovery: cannot raise Error_Resync function P_Formal_Package_Declaration return Node_Id is Def_Node : Node_Id; Scan_State : Saved_Scan_State; begin Scan; -- past PACKAGE Def_Node := New_Node (N_Formal_Package_Declaration, Prev_Token_Ptr); Set_Defining_Identifier (Def_Node, P_Defining_Identifier); T_Is; T_New; Set_Name (Def_Node, P_Qualified_Simple_Name); if Token = Tok_Left_Paren then Save_Scan_State (Scan_State); -- at the left paren Scan; -- past the left paren if Token = Tok_Box then Set_Box_Present (Def_Node, True); Scan; -- past box T_Right_Paren; else Restore_Scan_State (Scan_State); -- to the left paren Set_Generic_Associations (Def_Node, P_Generic_Actual_Part_Opt); end if; end if; T_Semicolon; return Def_Node; end P_Formal_Package_Declaration; -------------------------------------- -- 12.7 Formal Package Actual Part -- -------------------------------------- -- Parsed by P_Formal_Package_Declaration (12.7) end Ch12;