b733465f33
- Made private methods static where possible (runtime can elide checking the object for null). - Declared attribute classes as sealed (allows reflection on attributes to complete faster). - Moved some static cctor's into field initializers (static cctor's are slower than static field initializers). - Made classes static if they contained only static methods (can't create instances of useless objects). - Use inferable Exts.Lazy and not new Lazy<T>(). - Added required STAThread attribute to CrashDialog. - Removed unused parameters in private methods. - Added Serializable attribute to exceptions. - Added parameter name in calls to ArgumentNullException. - Use of as operator instead of is + cast. - Changed (x as Foo).Bar anti-pattern into ((Foo)x).Bar. Results in sensible cast exceptions on error rather than null dereferences. - Removed unused method in NullShader.
54 lines
1.3 KiB
C#
54 lines
1.3 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2011 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 COPYING.
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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.Primitives
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{
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public class Cache<T, U> : IEnumerable<KeyValuePair<T, U>>
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{
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Dictionary<T, U> hax;
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Func<T,U> loader;
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public Cache(Func<T,U> loader, IEqualityComparer<T> c)
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{
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hax = new Dictionary<T, U>(c);
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if (loader == null)
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throw new ArgumentNullException("loader");
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this.loader = loader;
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}
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public Cache(Func<T, U> loader)
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: this(loader, EqualityComparer<T>.Default) { }
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public U this[T key]
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{
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get
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{
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U result;
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if (!hax.TryGetValue(key, out result))
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hax.Add(key, result = loader(key));
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return result;
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}
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}
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public IEnumerator<KeyValuePair<T, U>> GetEnumerator() { return hax.GetEnumerator(); }
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IEnumerator IEnumerable.GetEnumerator() { return GetEnumerator(); }
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public IEnumerable<T> Keys { get { return hax.Keys; } }
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public IEnumerable<U> Values { get { return hax.Values; } }
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}
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}
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