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authorGravatar Yang Gao <yangg@google.com>2015-02-18 23:01:25 -0800
committerGravatar Yang Gao <yangg@google.com>2015-02-18 23:01:25 -0800
commitc09c2f4f0425591c533a98d7b3761ee562928450 (patch)
treef12f0d1d4ec9fb6754a3deec2bd1ea4ada626a73 /src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.m
parent0d1e2f2ad974b87e6d87a7bf49aec4dd94b25c91 (diff)
parent26fd5a4aedfc0175db391b14d78cff57a6910503 (diff)
Merge remote-tracking branch 'upstream/master' into roots
Diffstat (limited to 'src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.m')
-rw-r--r--src/objective-c/RxLibrary/private/GRXNSBlockEnumerator.m61
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