67 lines
1.6 KiB
C#
Executable File
67 lines
1.6 KiB
C#
Executable File
#region Copyright & License Information
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/*
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* Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see LICENSE.
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*/
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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namespace OpenRA.Collections
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{
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public class Set<T> : IEnumerable<T>
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{
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Dictionary<T, bool> data = new Dictionary<T, bool>();
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public void Add( T obj )
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{
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data.Add( obj, false );
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if( OnAdd != null )
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OnAdd( obj );
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}
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public void Remove( T obj )
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{
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data.Remove( obj );
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if( OnRemove != null )
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OnRemove( obj );
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}
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public event Action<T> OnAdd;
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public event Action<T> OnRemove;
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public IEnumerator<T> GetEnumerator()
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{
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return data.Keys.GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return GetEnumerator();
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}
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}
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public class CachedView<T,U> : Set<U>
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{
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public CachedView( Set<T> set, Func<T, bool> include, Func<T, U> store )
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: this( set, include, x => new[] { store( x ) } )
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{
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}
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public CachedView( Set<T> set, Func<T,bool> include, Func<T,IEnumerable<U>> store )
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{
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foreach( var t in set )
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if( include( t ) )
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store( t ).Do( x => Add( x ) );
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set.OnAdd += obj => { if( include( obj ) ) store( obj ).Do( x => Add( x ) ); };
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set.OnRemove += obj => { if( include( obj ) ) store( obj ).Do( x => Remove( x ) ); };
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}
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}
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}
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