1 files changed, 61 insertions, 0 deletions
diff --git a/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.m b/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.m
new file mode 100644
index 0000000000..53b8bb863d
--- /dev/null
+++ b/src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.m
@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#import "GRXNSBlockEnumerator.h"
+
+@implementation GRXNSBlockEnumerator {
+  id (^_block)();
+}
+
+- (instancetype)init {
+  return [self initWithValueSupplier:nil];
+}
+
+- (instancetype)initWithValueSupplier:(id (^)())block {
+  if ((self = [super init])) {
+    _block = block;
+  }
+  return self;
+}
+
+- (id)nextObject {
+  if (!_block) {
+    return nil;
+  }
+  id value = _block();
+  if (!value) {
+    _block = nil;
+  }
+  return value;
+}
+@end