New Language: Ada

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             P A R . C H 1 2                              --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                            $Revision: 1.46 $
+--                                                                          --
+--          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. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+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;
+
+   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 =>
+            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;
+      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;