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------------------------------------------------------------------------------
-- --
-- GNAT LIBRARY COMPONENTS --
-- --
-- ADA.CONTAINERS.RED_BLACK_TREES.GENERIC_SET_OPERATIONS --
-- --
-- S p e c --
-- --
-- Copyright (C) 2004-2007, 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, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- This unit was originally developed by Matthew J Heaney. --
------------------------------------------------------------------------------
-- Tree_Type is used to implement ordered containers. This package declares
-- set-based tree operations.
with Ada.Containers.Red_Black_Trees.Generic_Operations;
generic
with package Tree_Operations is new Generic_Operations (<>);
use Tree_Operations.Tree_Types;
with procedure Insert_With_Hint
(Dst_Tree : in out Tree_Type;
Dst_Hint : Node_Access;
Src_Node : Node_Access;
Dst_Node : out Node_Access);
with function Copy_Tree (Source_Root : Node_Access)
return Node_Access;
with procedure Delete_Tree (X : in out Node_Access);
with function Is_Less (Left, Right : Node_Access) return Boolean;
with procedure Free (X : in out Node_Access);
package Ada.Containers.Red_Black_Trees.Generic_Set_Operations is
pragma Pure;
procedure Union (Target : in out Tree_Type; Source : Tree_Type);
-- Attempts to insert each element of Source in Target. If Target is
-- busy then Program_Error is raised. We say "attempts" here because
-- if these are unique-element sets, then the insertion should fail
-- (not insert a new item) when the insertion item from Source is
-- equivalent to an item already in Target. If these are multisets
-- then of course the attempt should always succeed.
function Union (Left, Right : Tree_Type) return Tree_Type;
-- Makes a copy of Left, and attempts to insert each element of
-- Right into the copy, then returns the copy.
procedure Intersection (Target : in out Tree_Type; Source : Tree_Type);
-- Removes elements from Target that are not equivalent to items in
-- Source. If Target is busy then Program_Error is raised.
function Intersection (Left, Right : Tree_Type) return Tree_Type;
-- Returns a set comprising all the items in Left equivalent to items in
-- Right.
procedure Difference (Target : in out Tree_Type; Source : Tree_Type);
-- Removes elements from Target that are equivalent to items in Source. If
-- Target is busy then Program_Error is raised.
function Difference (Left, Right : Tree_Type) return Tree_Type;
-- Returns a set comprising all the items in Left not equivalent to items
-- in Right.
procedure Symmetric_Difference
(Target : in out Tree_Type;
Source : Tree_Type);
-- Removes from Target elements that are equivalent to items in Source, and
-- inserts into Target items from Source not equivalent elements in
-- Target. If Target is busy then Program_Error is raised.
function Symmetric_Difference (Left, Right : Tree_Type) return Tree_Type;
-- Returns a set comprising the union of the elements in Left not
-- equivalent to items in Right, and the elements in Right not equivalent
-- to items in Left.
function Is_Subset (Subset : Tree_Type; Of_Set : Tree_Type) return Boolean;
-- Returns False if Subset contains at least one element not equivalent to
-- any item in Of_Set; returns True otherwise.
function Overlap (Left, Right : Tree_Type) return Boolean;
-- Returns True if at least one element of Left is equivalent to an item in
-- Right; returns False otherwise.
end Ada.Containers.Red_Black_Trees.Generic_Set_Operations;
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