X-Git-Url: https://git.mdrn.pl/wl-app.git/blobdiff_plain/53b27422d140022594fc241cca91c3183be57bca..48b2fe9f7c2dc3d9aeaaa6dbfb27c7da4f3235ff:/iOS/Pods/Realm/include/core/realm/util/overload.hpp?ds=sidebyside

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+/*************************************************************************
+ *
+ * Copyright 2017 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_OVERLOAD_HPP
+#define REALM_UTIL_OVERLOAD_HPP
+
+#include <utility>
+
+namespace realm {
+
+namespace _impl {
+
+template<typename Fn, typename... Fns>
+struct Overloaded;
+
+} // namespace _impl
+
+
+namespace util {
+
+// Declare an overload set using lambdas or other function objects.
+// A minimal version of C++ Library Evolution Working Group proposal P0051R2.
+
+template<typename... Fns>
+_impl::Overloaded<Fns...> overload(Fns&&... f)
+{
+    return _impl::Overloaded<Fns...>(std::forward<Fns>(f)...);
+}
+
+} // namespace util
+
+
+namespace _impl {
+
+template<typename Fn, typename... Fns>
+struct Overloaded : Fn, Overloaded<Fns...> {
+    template<typename U, typename... Rest>
+    Overloaded(U&& fn, Rest&&... rest) : Fn(std::forward<U>(fn)), Overloaded<Fns...>(std::forward<Rest>(rest)...) { }
+
+    using Fn::operator();
+    using Overloaded<Fns...>::operator();
+};
+
+template<typename Fn>
+struct Overloaded<Fn> : Fn {
+    template<typename U>
+    Overloaded(U&& fn) : Fn(std::forward<U>(fn)) { }
+
+    using Fn::operator();
+};
+
+} // namespace _impl
+} // namespace realm
+
+#endif // REALM_UTIL_OVERLOAD_HPP