915 lines
29 KiB
Ada
915 lines
29 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- P A R . C H 1 2 --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2004 Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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-- MA 02111-1307, USA. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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pragma Style_Checks (All_Checks);
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-- Turn off subprogram body ordering check. Subprograms are in order
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-- by RM section rather than alphabetical
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separate (Par)
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package body Ch12 is
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-- Local functions, used only in this chapter
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function P_Formal_Derived_Type_Definition return Node_Id;
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function P_Formal_Discrete_Type_Definition return Node_Id;
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function P_Formal_Fixed_Point_Definition return Node_Id;
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function P_Formal_Floating_Point_Definition return Node_Id;
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function P_Formal_Modular_Type_Definition return Node_Id;
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function P_Formal_Package_Declaration return Node_Id;
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function P_Formal_Private_Type_Definition return Node_Id;
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function P_Formal_Signed_Integer_Type_Definition return Node_Id;
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function P_Formal_Subprogram_Declaration return Node_Id;
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function P_Formal_Type_Declaration return Node_Id;
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function P_Formal_Type_Definition return Node_Id;
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function P_Generic_Association return Node_Id;
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procedure P_Formal_Object_Declarations (Decls : List_Id);
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-- Scans one or more formal object declarations and appends them to
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-- Decls. Scans more than one declaration only in the case where the
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-- source has a declaration with multiple defining identifiers.
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--------------------------------
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-- 12.1 Generic (also 8.5.5) --
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--------------------------------
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-- This routine parses either one of the forms of a generic declaration
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-- or a generic renaming declaration.
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-- GENERIC_DECLARATION ::=
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-- GENERIC_SUBPROGRAM_DECLARATION | GENERIC_PACKAGE_DECLARATION
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-- GENERIC_SUBPROGRAM_DECLARATION ::=
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-- GENERIC_FORMAL_PART SUBPROGRAM_SPECIFICATION;
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-- GENERIC_PACKAGE_DECLARATION ::=
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-- GENERIC_FORMAL_PART PACKAGE_SPECIFICATION;
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-- GENERIC_FORMAL_PART ::=
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-- generic {GENERIC_FORMAL_PARAMETER_DECLARATION | USE_CLAUSE}
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-- GENERIC_RENAMING_DECLARATION ::=
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-- generic package DEFINING_PROGRAM_UNIT_NAME
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-- renames generic_package_NAME
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-- | generic procedure DEFINING_PROGRAM_UNIT_NAME
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-- renames generic_procedure_NAME
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-- | generic function DEFINING_PROGRAM_UNIT_NAME
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-- renames generic_function_NAME
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-- GENERIC_FORMAL_PARAMETER_DECLARATION ::=
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-- FORMAL_OBJECT_DECLARATION
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-- | FORMAL_TYPE_DECLARATION
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-- | FORMAL_SUBPROGRAM_DECLARATION
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-- | FORMAL_PACKAGE_DECLARATION
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-- The caller has checked that the initial token is GENERIC
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-- Error recovery: can raise Error_Resync
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function P_Generic return Node_Id is
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Gen_Sloc : constant Source_Ptr := Token_Ptr;
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Gen_Decl : Node_Id;
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Decl_Node : Node_Id;
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Decls : List_Id;
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Def_Unit : Node_Id;
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Ren_Token : Token_Type;
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Scan_State : Saved_Scan_State;
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begin
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Scan; -- past GENERIC
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if Token = Tok_Private then
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Error_Msg_SC ("PRIVATE goes before GENERIC, not after");
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Scan; -- past junk PRIVATE token
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end if;
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Save_Scan_State (Scan_State); -- at token past GENERIC
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-- Check for generic renaming declaration case
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if Token = Tok_Package
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or else Token = Tok_Function
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or else Token = Tok_Procedure
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then
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Ren_Token := Token;
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Scan; -- scan past PACKAGE, FUNCTION or PROCEDURE
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if Token = Tok_Identifier then
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Def_Unit := P_Defining_Program_Unit_Name;
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Check_Misspelling_Of (Tok_Renames);
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if Token = Tok_Renames then
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if Ren_Token = Tok_Package then
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Decl_Node := New_Node
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(N_Generic_Package_Renaming_Declaration, Gen_Sloc);
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elsif Ren_Token = Tok_Procedure then
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Decl_Node := New_Node
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(N_Generic_Procedure_Renaming_Declaration, Gen_Sloc);
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else -- Ren_Token = Tok_Function then
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Decl_Node := New_Node
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(N_Generic_Function_Renaming_Declaration, Gen_Sloc);
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end if;
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Scan; -- past RENAMES
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Set_Defining_Unit_Name (Decl_Node, Def_Unit);
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Set_Name (Decl_Node, P_Name);
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TF_Semicolon;
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return Decl_Node;
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end if;
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end if;
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end if;
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-- Fall through if this is *not* a generic renaming declaration
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Restore_Scan_State (Scan_State);
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Decls := New_List;
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-- Loop through generic parameter declarations and use clauses
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Decl_Loop : loop
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P_Pragmas_Opt (Decls);
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Ignore (Tok_Private);
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if Token = Tok_Use then
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Append (P_Use_Clause, Decls);
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else
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-- Parse a generic parameter declaration
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if Token = Tok_Identifier then
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P_Formal_Object_Declarations (Decls);
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elsif Token = Tok_Type then
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Append (P_Formal_Type_Declaration, Decls);
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elsif Token = Tok_With then
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Scan; -- past WITH
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if Token = Tok_Package then
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Append (P_Formal_Package_Declaration, Decls);
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elsif Token = Tok_Procedure or Token = Tok_Function then
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Append (P_Formal_Subprogram_Declaration, Decls);
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else
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Error_Msg_BC
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("FUNCTION, PROCEDURE or PACKAGE expected here");
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Resync_Past_Semicolon;
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end if;
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elsif Token = Tok_Subtype then
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Error_Msg_SC ("subtype declaration not allowed " &
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"as generic parameter declaration!");
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Resync_Past_Semicolon;
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else
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exit Decl_Loop;
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end if;
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end if;
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end loop Decl_Loop;
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-- Generic formal part is scanned, scan out subprogram or package spec
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if Token = Tok_Package then
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Gen_Decl := New_Node (N_Generic_Package_Declaration, Gen_Sloc);
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Set_Specification (Gen_Decl, P_Package (Pf_Spcn));
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else
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Gen_Decl := New_Node (N_Generic_Subprogram_Declaration, Gen_Sloc);
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Set_Specification (Gen_Decl, P_Subprogram_Specification);
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if Nkind (Defining_Unit_Name (Specification (Gen_Decl))) =
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N_Defining_Program_Unit_Name
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and then Scope.Last > 0
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then
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Error_Msg_SP ("child unit allowed only at library level");
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end if;
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TF_Semicolon;
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end if;
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Set_Generic_Formal_Declarations (Gen_Decl, Decls);
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return Gen_Decl;
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end P_Generic;
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-------------------------------
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-- 12.1 Generic Declaration --
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-------------------------------
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-- Parsed by P_Generic (12.1)
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------------------------------------------
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-- 12.1 Generic Subprogram Declaration --
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------------------------------------------
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-- Parsed by P_Generic (12.1)
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---------------------------------------
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-- 12.1 Generic Package Declaration --
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---------------------------------------
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-- Parsed by P_Generic (12.1)
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-------------------------------
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-- 12.1 Generic Formal Part --
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-------------------------------
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-- Parsed by P_Generic (12.1)
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-------------------------------------------------
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-- 12.1 Generic Formal Parameter Declaration --
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-------------------------------------------------
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-- Parsed by P_Generic (12.1)
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---------------------------------
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-- 12.3 Generic Instantiation --
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---------------------------------
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-- Generic package instantiation parsed by P_Package (7.1)
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-- Generic procedure instantiation parsed by P_Subprogram (6.1)
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-- Generic function instantiation parsed by P_Subprogram (6.1)
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-------------------------------
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-- 12.3 Generic Actual Part --
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-------------------------------
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-- GENERIC_ACTUAL_PART ::=
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-- (GENERIC_ASSOCIATION {, GENERIC_ASSOCIATION})
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-- Returns a list of generic associations, or Empty if none are present
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-- Error recovery: cannot raise Error_Resync
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function P_Generic_Actual_Part_Opt return List_Id is
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Association_List : List_Id;
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begin
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-- Figure out if a generic actual part operation is present. Clearly
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-- there is no generic actual part if the current token is semicolon
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if Token = Tok_Semicolon then
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return No_List;
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-- If we don't have a left paren, then we have an error, and the job
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-- is to figure out whether a left paren or semicolon was intended.
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-- We assume a missing left paren (and hence a generic actual part
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-- present) if the current token is not on a new line, or if it is
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-- indented from the subprogram token. Otherwise assume missing
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-- semicolon (which will be diagnosed by caller) and no generic part
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elsif Token /= Tok_Left_Paren
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and then Token_Is_At_Start_Of_Line
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and then Start_Column <= Scope.Table (Scope.Last).Ecol
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then
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return No_List;
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-- Otherwise we have a generic actual part (either a left paren is
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-- present, or we have decided that there must be a missing left paren)
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else
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Association_List := New_List;
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T_Left_Paren;
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loop
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Append (P_Generic_Association, Association_List);
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exit when not Comma_Present;
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end loop;
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T_Right_Paren;
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return Association_List;
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end if;
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end P_Generic_Actual_Part_Opt;
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-------------------------------
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-- 12.3 Generic Association --
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-------------------------------
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-- GENERIC_ASSOCIATION ::=
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-- [generic_formal_parameter_SELECTOR_NAME =>]
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-- EXPLICIT_GENERIC_ACTUAL_PARAMETER
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-- EXPLICIT_GENERIC_ACTUAL_PARAMETER ::=
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-- EXPRESSION | variable_NAME | subprogram_NAME
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-- | entry_NAME | SUBTYPE_MARK | package_instance_NAME
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-- Error recovery: cannot raise Error_Resync
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function P_Generic_Association return Node_Id is
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Scan_State : Saved_Scan_State;
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Param_Name_Node : Node_Id;
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Generic_Assoc_Node : Node_Id;
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begin
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Generic_Assoc_Node := New_Node (N_Generic_Association, Token_Ptr);
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if Token in Token_Class_Desig then
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Param_Name_Node := Token_Node;
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Save_Scan_State (Scan_State); -- at designator
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Scan; -- past simple name or operator symbol
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if Token = Tok_Arrow then
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Scan; -- past arrow
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Set_Selector_Name (Generic_Assoc_Node, Param_Name_Node);
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else
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Restore_Scan_State (Scan_State); -- to designator
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end if;
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end if;
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Set_Explicit_Generic_Actual_Parameter (Generic_Assoc_Node, P_Expression);
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return Generic_Assoc_Node;
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end P_Generic_Association;
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---------------------------------------------
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-- 12.3 Explicit Generic Actual Parameter --
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---------------------------------------------
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-- Parsed by P_Generic_Association (12.3)
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--------------------------------------
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-- 12.4 Formal Object Declarations --
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--------------------------------------
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-- FORMAL_OBJECT_DECLARATION ::=
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-- DEFINING_IDENTIFIER_LIST :
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-- MODE SUBTYPE_MARK [:= DEFAULT_EXPRESSION];
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-- The caller has checked that the initial token is an identifier
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-- Error recovery: cannot raise Error_Resync
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procedure P_Formal_Object_Declarations (Decls : List_Id) is
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Decl_Node : Node_Id;
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Scan_State : Saved_Scan_State;
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Num_Idents : Nat;
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Ident : Nat;
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Idents : array (Int range 1 .. 4096) of Entity_Id;
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-- This array holds the list of defining identifiers. The upper bound
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-- of 4096 is intended to be essentially infinite, and we do not even
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-- bother to check for it being exceeded.
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begin
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Idents (1) := P_Defining_Identifier (C_Comma_Colon);
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Num_Idents := 1;
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while Comma_Present loop
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Num_Idents := Num_Idents + 1;
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Idents (Num_Idents) := P_Defining_Identifier (C_Comma_Colon);
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end loop;
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T_Colon;
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-- If there are multiple identifiers, we repeatedly scan the
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-- type and initialization expression information by resetting
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-- the scan pointer (so that we get completely separate trees
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-- for each occurrence).
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if Num_Idents > 1 then
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Save_Scan_State (Scan_State);
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end if;
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-- Loop through defining identifiers in list
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Ident := 1;
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Ident_Loop : loop
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Decl_Node := New_Node (N_Formal_Object_Declaration, Token_Ptr);
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Set_Defining_Identifier (Decl_Node, Idents (Ident));
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P_Mode (Decl_Node);
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Set_Subtype_Mark (Decl_Node, P_Subtype_Mark_Resync);
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No_Constraint;
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Set_Expression (Decl_Node, Init_Expr_Opt);
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if Ident > 1 then
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Set_Prev_Ids (Decl_Node, True);
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end if;
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if Ident < Num_Idents then
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Set_More_Ids (Decl_Node, True);
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end if;
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Append (Decl_Node, Decls);
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exit Ident_Loop when Ident = Num_Idents;
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Ident := Ident + 1;
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Restore_Scan_State (Scan_State);
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end loop Ident_Loop;
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TF_Semicolon;
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end P_Formal_Object_Declarations;
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-----------------------------------
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-- 12.5 Formal Type Declaration --
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-----------------------------------
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-- FORMAL_TYPE_DECLARATION ::=
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-- type DEFINING_IDENTIFIER [DISCRIMINANT_PART]
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-- is FORMAL_TYPE_DEFINITION;
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-- The caller has checked that the initial token is TYPE
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-- Error recovery: cannot raise Error_Resync
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function P_Formal_Type_Declaration return Node_Id is
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Decl_Node : Node_Id;
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Def_Node : Node_Id;
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begin
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Decl_Node := New_Node (N_Formal_Type_Declaration, Token_Ptr);
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Scan; -- past TYPE
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Set_Defining_Identifier (Decl_Node, P_Defining_Identifier);
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if P_Unknown_Discriminant_Part_Opt then
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Set_Unknown_Discriminants_Present (Decl_Node, True);
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else
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Set_Discriminant_Specifications
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(Decl_Node, P_Known_Discriminant_Part_Opt);
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end if;
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T_Is;
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Def_Node := P_Formal_Type_Definition;
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if Def_Node /= Error then
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Set_Formal_Type_Definition (Decl_Node, Def_Node);
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TF_Semicolon;
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else
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Decl_Node := Error;
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-- If we have semicolon, skip it to avoid cascaded errors
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if Token = Tok_Semicolon then
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Scan;
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end if;
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end if;
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return Decl_Node;
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end P_Formal_Type_Declaration;
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----------------------------------
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-- 12.5 Formal Type Definition --
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----------------------------------
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-- FORMAL_TYPE_DEFINITION ::=
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-- FORMAL_PRIVATE_TYPE_DEFINITION
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-- | FORMAL_DERIVED_TYPE_DEFINITION
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-- | FORMAL_DISCRETE_TYPE_DEFINITION
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-- | FORMAL_SIGNED_INTEGER_TYPE_DEFINITION
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-- | FORMAL_MODULAR_TYPE_DEFINITION
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-- | FORMAL_FLOATING_POINT_DEFINITION
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-- | FORMAL_ORDINARY_FIXED_POINT_DEFINITION
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-- | FORMAL_DECIMAL_FIXED_POINT_DEFINITION
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-- | FORMAL_ARRAY_TYPE_DEFINITION
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-- | FORMAL_ACCESS_TYPE_DEFINITION
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-- FORMAL_ARRAY_TYPE_DEFINITION ::= ARRAY_TYPE_DEFINITION
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-- FORMAL_ACCESS_TYPE_DEFINITION ::= ACCESS_TYPE_DEFINITION
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function P_Formal_Type_Definition return Node_Id is
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Scan_State : Saved_Scan_State;
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begin
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if Token_Name = Name_Abstract then
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Check_95_Keyword (Tok_Abstract, Tok_Tagged);
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end if;
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if Token_Name = Name_Tagged then
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Check_95_Keyword (Tok_Tagged, Tok_Private);
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Check_95_Keyword (Tok_Tagged, Tok_Limited);
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end if;
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case Token is
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-- Mostly we can tell what we have from the initial token. The one
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-- exception is ABSTRACT, where we have to scan ahead to see if we
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-- have a formal derived type or a formal private type definition.
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when Tok_Abstract =>
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Save_Scan_State (Scan_State);
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Scan; -- past ABSTRACT
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if Token = Tok_New then
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Restore_Scan_State (Scan_State); -- to ABSTRACT
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return P_Formal_Derived_Type_Definition;
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else
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Restore_Scan_State (Scan_State); -- to ABSTRACT
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return P_Formal_Private_Type_Definition;
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end if;
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when Tok_Private | Tok_Limited | Tok_Tagged =>
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return P_Formal_Private_Type_Definition;
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when Tok_New =>
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return P_Formal_Derived_Type_Definition;
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when Tok_Left_Paren =>
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return P_Formal_Discrete_Type_Definition;
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when Tok_Range =>
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return P_Formal_Signed_Integer_Type_Definition;
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when Tok_Mod =>
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return P_Formal_Modular_Type_Definition;
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when Tok_Digits =>
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return P_Formal_Floating_Point_Definition;
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when Tok_Delta =>
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return P_Formal_Fixed_Point_Definition;
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when Tok_Array =>
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return P_Array_Type_Definition;
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|
|
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 (C_Is));
|
|
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;
|