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|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- P A R . C H 8 --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2024, 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 3, 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 COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- 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 Ch8 is
-----------------------
-- Local Subprograms --
-----------------------
procedure Append_Use_Clause
(Item_List : List_Id;
Use_Node : Node_Id;
Is_First : in out Boolean;
Is_Last : in out Boolean);
-- Append a use_clause to the Item_List, appropriately setting the Prev_Ids
-- and More_Ids flags for each split use node. The flags Is_First and
-- Is_Last track position of subtype_marks or names within the original
-- use_clause.
procedure P_Use_Package_Clause (Item_List : List_Id);
procedure P_Use_Type_Clause (Item_List : List_Id);
-----------------------
-- Append_Use_Clause --
-----------------------
procedure Append_Use_Clause
(Item_List : List_Id;
Use_Node : Node_Id;
Is_First : in out Boolean;
Is_Last : in out Boolean)
is
begin
if Token /= Tok_Comma then
if not Is_First then
Set_Prev_Ids (Use_Node);
end if;
Append (Use_Node, Item_List);
Is_Last := True;
else
Set_More_Ids (Use_Node);
if not Is_First then
Set_Prev_Ids (Use_Node);
else
Is_First := False;
end if;
Append (Use_Node, Item_List);
Scan; -- Past comma
end if;
end Append_Use_Clause;
---------------------
-- 8.4 Use Clause --
---------------------
-- USE_CLAUSE ::= USE_PACKAGE_CLAUSE | USE_TYPE_CLAUSE
-- The caller has checked that the initial token is USE
-- Error recovery: cannot raise Error_Resync
procedure P_Use_Clause (Item_List : List_Id) is
begin
Scan; -- past USE
if Token in Tok_Type | Tok_All then
P_Use_Type_Clause (Item_List);
else
P_Use_Package_Clause (Item_List);
end if;
end P_Use_Clause;
-----------------------------
-- 8.4 Use Package Clause --
-----------------------------
-- USE_PACKAGE_CLAUSE ::= use package_NAME {, package_NAME};
-- The caller has scanned out the USE keyword
-- Error recovery: cannot raise Error_Resync
procedure P_Use_Package_Clause (Item_List : List_Id) is
Is_First : Boolean := True;
Is_Last : Boolean := False;
Use_Node : Node_Id;
Use_Sloc : constant Source_Ptr := Prev_Token_Ptr;
begin
if Token = Tok_Package then
Error_Msg_SC ("PACKAGE should not appear here");
Scan; -- Past PACKAGE
end if;
-- Loop through names in a single use_package_clause, generating an
-- N_Use_Package_Clause node for each name encountered.
loop
Use_Node := New_Node (N_Use_Package_Clause, Use_Sloc);
Set_Name (Use_Node, P_Qualified_Simple_Name);
-- Locally chain each name's use-package node
Append_Use_Clause (Item_List, Use_Node, Is_First, Is_Last);
exit when Is_Last;
end loop;
TF_Semicolon;
end P_Use_Package_Clause;
--------------------------
-- 8.4 Use Type Clause --
--------------------------
-- USE_TYPE_CLAUSE ::= use [ALL] type SUBTYPE_MARK {, SUBTYPE_MARK};
-- The caller has checked that the initial token is USE, scanned it out
-- and that the current token is either ALL or TYPE.
-- Note: Use of ALL is an Ada 2012 feature
-- Error recovery: cannot raise Error_Resync
procedure P_Use_Type_Clause (Item_List : List_Id) is
Use_Sloc : constant Source_Ptr := Prev_Token_Ptr;
All_Present : Boolean;
Is_First : Boolean := True;
Is_Last : Boolean := False;
Use_Node : Node_Id;
begin
if Token = Tok_All then
Error_Msg_Ada_2012_Feature ("|`USE ALL TYPE`", Token_Ptr);
All_Present := True;
Scan; -- Past ALL
if Token /= Tok_Type then
Error_Msg_SC ("TYPE expected");
end if;
else
pragma Assert (Token = Tok_Type);
All_Present := False;
end if;
if Ada_Version = Ada_83 then
Error_Msg_SC ("(Ada 83) use type not allowed!");
end if;
Scan; -- Past TYPE
-- Loop through subtype_marks in one use_type_clause, generating a
-- separate N_Use_Type_Clause node for each subtype_mark encountered.
loop
Use_Node := New_Node (N_Use_Type_Clause, Use_Sloc);
Set_All_Present (Use_Node, All_Present);
Set_Used_Operations (Use_Node, No_Elist);
Set_Subtype_Mark (Use_Node, P_Subtype_Mark);
No_Constraint;
-- Locally chain each subtype_mark's use-type node
Append_Use_Clause (Item_List, Use_Node, Is_First, Is_Last);
exit when Is_Last;
end loop;
TF_Semicolon;
end P_Use_Type_Clause;
-------------------------------
-- 8.5 Renaming Declaration --
-------------------------------
-- Object renaming declarations and exception renaming declarations
-- are parsed by P_Identifier_Declaration (3.3.1)
-- Subprogram renaming declarations are parsed by P_Subprogram (6.1)
-- Package renaming declarations are parsed by P_Package (7.1)
-- Generic renaming declarations are parsed by P_Generic (12.1)
----------------------------------------
-- 8.5.1 Object Renaming Declaration --
----------------------------------------
-- Parsed by P_Identifier_Declarations (3.3.1)
-------------------------------------------
-- 8.5.2 Exception Renaming Declaration --
-------------------------------------------
-- Parsed by P_Identifier_Declarations (3.3.1)
-----------------------------------------
-- 8.5.3 Package Renaming Declaration --
-----------------------------------------
-- Parsed by P_Package (7.1)
--------------------------------------------
-- 8.5.4 Subprogram Renaming Declaration --
--------------------------------------------
-- Parsed by P_Subprogram (6.1)
-----------------------------------------
-- 8.5.2 Generic Renaming Declaration --
-----------------------------------------
-- Parsed by P_Generic (12.1)
end Ch8;
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