------------------------------------------------------------------------------ | |

-- -- | |

-- GNAT LIBRARY COMPONENTS -- | |

-- -- | |

-- ADA.CONTAINERS.RED_BLACK_TREES.GENERIC_SET_OPERATIONS -- | |

-- -- | |

-- S p e c -- | |

-- -- | |

-- Copyright (C) 2004-2021, 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. -- | |

-- -- | |

-- As a special exception under Section 7 of GPL version 3, you are granted -- | |

-- additional permissions described in the GCC Runtime Library Exception, -- | |

-- version 3.1, as published by the Free Software Foundation. -- | |

-- -- | |

-- You should have received a copy of the GNU General Public License and -- | |

-- a copy of the GCC Runtime Library Exception along with this program; -- | |

-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- | |

-- <http://www.gnu.org/licenses/>. -- | |

-- -- | |

-- 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, Tree_Operations.Tree_Types.Implementation; | |

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; |