mcs/class/Mono.CodeContracts/Mono.CodeContracts.Static.DataStructures/IImmutableSet.cs

   1 //
   2 // IImmutableSet.cs
   3 //
   4 // Authors:
   5 //      Alexander Chebaturkin (chebaturkin@gmail.com)
   6 //
   7 // Copyright (C) 2011 Alexander Chebaturkin
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Collections.Generic;
  31 using System.IO;
  32
  33 namespace Mono.CodeContracts.Static.DataStructures {
  34         interface IImmutableSet<T> {
  35                 T Any { get; }
  36                 int Count { get; }
  37                 IEnumerable<T> Elements { get; }
  38                 IImmutableSet<T> Add (T item);
  39         IImmutableSet<T> AddRange (IEnumerable<T> item);
  40                 IImmutableSet<T> Remove (T item);
  41                 bool Contains (T item);
  42                 bool IsContainedIn (IImmutableSet<T> that);
  43                 IImmutableSet<T> Intersect (IImmutableSet<T> that);
  44                 IImmutableSet<T> Union (IImmutableSet<T> that);
  45                 void Visit (Action<T> visitor);
  46                 void Dump (TextWriter tw);
  47         }
  48 }