1 files changed, 53 insertions, 0 deletions
diff --git a/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/For.cs b/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/For.cs
new file mode 100644
index 0000000..85b9e03
--- /dev/null
+++ b/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/For.cs
@@ -0,0 +1,53 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#if !NO_PERF
+using System;
+using System.Collections.Generic;
+
+namespace System.Reactive.Linq.Observαble
+{
+    class For<TSource, TResult> : Producer<TResult>, IConcatenatable<TResult>
+    {
+        private readonly IEnumerable<TSource> _source;
+        private readonly Func<TSource, IObservable<TResult>> _resultSelector;
+
+        public For(IEnumerable<TSource> source, Func<TSource, IObservable<TResult>> resultSelector)
+        {
+            _source = source;
+            _resultSelector = resultSelector;
+        }
+
+        protected override IDisposable Run(IObserver<TResult> observer, IDisposable cancel, Action<IDisposable> setSink)
+        {
+            var sink = new _(observer, cancel);
+            setSink(sink);
+            return sink.Run(GetSources());
+        }
+
+        public IEnumerable<IObservable<TResult>> GetSources()
+        {
+            foreach (var item in _source)
+                yield return _resultSelector(item);
+        }
+
+        class _ : ConcatSink<TResult>
+        {
+            public _(IObserver<TResult> observer, IDisposable cancel)
+                : base(observer, cancel)
+            {
+            }
+
+            public override void OnNext(TResult value)
+            {
+                base._observer.OnNext(value);
+            }
+
+            public override void OnError(Exception error)
+            {
+                base._observer.OnError(error);
+                base.Dispose();
+            }
+        }
+    }
+}
+#endif