added iOS source code

[wl-app.git] / iOS / Pods / Realm / include / core / realm / util / scope_exit.hpp

diff --git a/iOS/Pods/Realm/include/core/realm/util/scope_exit.hpp b/iOS/Pods/Realm/include/core/realm/util/scope_exit.hpp
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+++ b/iOS/Pods/Realm/include/core/realm/util/scope_exit.hpp
@@ -0,0 +1,72 @@
+/*************************************************************************
+ *
+ * Copyright 2016 Realm Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ **************************************************************************/
+
+#ifndef REALM_UTIL_SCOPE_EXIT_HPP
+#define REALM_UTIL_SCOPE_EXIT_HPP
+
+#include <type_traits>
+#include <utility>
+
+#include <realm/util/optional.hpp>
+
+namespace realm {
+namespace util {
+
+template <class H>
+class ScopeExit {
+public:
+    explicit ScopeExit(const H& handler) noexcept(std::is_nothrow_copy_constructible<H>::value)
+        : m_handler(handler)
+    {
+    }
+
+    explicit ScopeExit(H&& handler) noexcept(std::is_nothrow_move_constructible<H>::value)
+        : m_handler(std::move(handler))
+    {
+    }
+
+    ScopeExit(ScopeExit&& se) noexcept(std::is_nothrow_move_constructible<H>::value)
+        : m_handler(std::move(se.m_handler))
+    {
+        se.m_handler = none;
+    }
+
+    ~ScopeExit() noexcept
+    {
+        if (m_handler)
+            (*m_handler)();
+    }
+
+    static_assert(noexcept(std::declval<H>()()), "Handler must be nothrow executable");
+    static_assert(std::is_nothrow_destructible<H>::value, "Handler must be nothrow destructible");
+
+private:
+    util::Optional<H> m_handler;
+};
+
+template <class H>
+ScopeExit<typename std::remove_reference<H>::type> make_scope_exit(H&& handler) noexcept(
+    noexcept(ScopeExit<typename std::remove_reference<H>::type>(std::forward<H>(handler))))
+{
+    return ScopeExit<typename std::remove_reference<H>::type>(std::forward<H>(handler));
+}
+
+} // namespace util
+} // namespace realm
+
+#endif // REALM_UTIL_SCOPE_EXIT_HPP