+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- P A R . C H 1 2 --
--- --
--- B o d y --
--- --
--- $Revision: 1.4.10.1 $
--- --
--- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
--- --
--- 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, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
-pragma Style_Checks (All_Checks);
--- Turn off subprogram body ordering check. Subprograms are in order
--- by RM section rather than alphabetical
-
-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_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_Signed_Integer_Type_Definition return Node_Id;
- function P_Formal_Subprogram_Declaration 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
-
- if Token = Tok_Private then
- Error_Msg_SC ("PRIVATE goes before GENERIC, not after");
- Scan; -- past junk PRIVATE token
- end if;
-
- 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;
-
- Check_Misspelling_Of (Tok_Renames);
-
- 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
- P_Pragmas_Opt (Decls);
- Ignore (Tok_Private);
-
- 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 or Token = Tok_Function then
- Append (P_Formal_Subprogram_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;
- Def_Node : 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;
-
- Def_Node := P_Formal_Type_Definition;
-
- if Def_Node /= Error then
- Set_Formal_Type_Definition (Decl_Node, Def_Node);
- TF_Semicolon;
-
- else
- Decl_Node := Error;
-
- -- If we have semicolon, skip it to avoid cascaded errors
-
- if Token = Tok_Semicolon then
- Scan;
- end if;
- end if;
-
- 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 =>
- 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
- 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
- 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;
-
- elsif Token = Tok_Tagged then
- Scan;
-
- if Token = Tok_Private then
- Error_Msg_SC ("TAGGED should be WITH");
- Set_Private_Present (Def_Node, True);
- T_Private;
- else
- Ignore (Tok_Tagged);
- end if;
- 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);
- 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_Subprogram_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
- T_Is; -- past IS, skip extra IS or ";"
-
- 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_Subprogram_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
- Def_Node := New_Node (N_Formal_Package_Declaration, Prev_Token_Ptr);
- Scan; -- past PACKAGE
- 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;
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