1 files changed, 128 insertions, 0 deletions
diff --git a/ICSharpCode.Decompiler/ILAst/DefaultDictionary.cs b/ICSharpCode.Decompiler/ILAst/DefaultDictionary.cs
new file mode 100644
index 00000000..1e359a3d
--- /dev/null
+++ b/ICSharpCode.Decompiler/ILAst/DefaultDictionary.cs
@@ -0,0 +1,128 @@
+// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace ICSharpCode.Decompiler.ILAst
+{
+	/// <summary>
+	/// Dictionary with default values.
+	/// </summary>
+	internal sealed class DefaultDictionary<TKey, TValue> : IDictionary<TKey, TValue>
+	{
+		readonly IDictionary<TKey, TValue> dict;
+		readonly Func<TKey, TValue> defaultProvider;
+		
+		public DefaultDictionary(TValue defaultValue, IDictionary<TKey, TValue> dictionary = null)
+			: this(key => defaultValue, dictionary)
+		{
+		}
+		
+		public DefaultDictionary(Func<TKey, TValue> defaultProvider = null, IDictionary<TKey, TValue> dictionary = null)
+		{
+			dict = dictionary ?? new Dictionary<TKey, TValue>();
+			this.defaultProvider = defaultProvider ?? (key => default(TValue));
+		}
+		
+		public TValue this[TKey key] {
+			get {
+				TValue val;
+				if (dict.TryGetValue(key, out val))
+					return val;
+				else
+					return dict[key] = defaultProvider(key);
+			}
+			set {
+				dict[key] = value;
+			}
+		}
+		
+		public ICollection<TKey> Keys {
+			get { return dict.Keys; }
+		}
+		
+		public ICollection<TValue> Values {
+			get { return dict.Values; }
+		}
+		
+		public int Count {
+			get { return dict.Count; }
+		}
+		
+		bool ICollection<KeyValuePair<TKey, TValue>>.IsReadOnly {
+			get { return false; }
+		}
+		
+		public bool ContainsKey(TKey key)
+		{
+			return dict.ContainsKey(key);
+		}
+		
+		public void Add(TKey key, TValue value)
+		{
+			dict.Add(key, value);
+		}
+		
+		public bool Remove(TKey key)
+		{
+			return dict.Remove(key);
+		}
+		
+		public bool TryGetValue(TKey key, out TValue value)
+		{
+			return dict.TryGetValue(key, out value);
+		}
+		
+		void ICollection<KeyValuePair<TKey, TValue>>.Add(KeyValuePair<TKey, TValue> item)
+		{
+			dict.Add(item);
+		}
+		
+		public void Clear()
+		{
+			dict.Clear();
+		}
+		
+		bool ICollection<KeyValuePair<TKey, TValue>>.Contains(KeyValuePair<TKey, TValue> item)
+		{
+			return dict.Contains(item);
+		}
+		
+		void ICollection<KeyValuePair<TKey, TValue>>.CopyTo(KeyValuePair<TKey, TValue>[] array, int arrayIndex)
+		{
+			dict.CopyTo(array, arrayIndex);
+		}
+		
+		bool ICollection<KeyValuePair<TKey, TValue>>.Remove(KeyValuePair<TKey, TValue> item)
+		{
+			return dict.Remove(item);
+		}
+		
+		IEnumerator<KeyValuePair<TKey, TValue>> IEnumerable<KeyValuePair<TKey, TValue>>.GetEnumerator()
+		{
+			return dict.GetEnumerator();
+		}
+		
+		IEnumerator IEnumerable.GetEnumerator()
+		{
+			return dict.GetEnumerator();
+		}
+	}
+}
+\ No newline at end of file