Imported Upstream version 4.3.2.467

Former-commit-id: 9c2cb47f45fa221e661ab616387c9cda183f283d

mcs/class/System.Threading.Tasks.Dataflow/CoreFxSources/Internal/EnumerableDebugView.cs

@@ -0,0 +1,57 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+// =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
+//
+// EnumerableDebugView.cs
+//
+//
+// Debugger type proxy for enumerables.
+//
+// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.Contracts;
+using System.Linq;
+
+namespace System.Threading.Tasks.Dataflow.Internal
+{
+    /// <summary>Debugger type proxy for an enumerable of T.</summary>
+    internal sealed class EnumerableDebugView<TKey, TValue>
+    {
+        /// <summary>The enumerable being visualized.</summary>
+        private readonly IEnumerable<KeyValuePair<TKey, TValue>> _enumerable;
+
+        /// <summary>Initializes the debug view.</summary>
+        /// <param name="enumerable">The enumerable being debugged.</param>
+        public EnumerableDebugView(IEnumerable<KeyValuePair<TKey, TValue>> enumerable)
+        {
+            Contract.Requires(enumerable != null, "Expected a non-null enumerable.");
+            _enumerable = enumerable;
+        }
+
+        /// <summary>Gets the contents of the list.</summary>
+        [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
+        public KeyValuePair<TKey, TValue>[] Items { get { return _enumerable.ToArray(); } }
+    }
+
+    /// <summary>Debugger type proxy for an enumerable of T.</summary>
+    internal sealed class EnumerableDebugView<T>
+    {
+        /// <summary>The enumerable being visualized.</summary>
+        private readonly IEnumerable<T> _enumerable;
+
+        /// <summary>Initializes the debug view.</summary>
+        /// <param name="enumerable">The enumerable being debugged.</param>
+        public EnumerableDebugView(IEnumerable<T> enumerable)
+        {
+            Contract.Requires(enumerable != null, "Expected a non-null enumerable.");
+            _enumerable = enumerable;
+        }
+
+        /// <summary>Gets the contents of the list.</summary>
+        [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
+        public T[] Items { get { return _enumerable.ToArray(); } }
+    }
+}