mirror of https://gitee.com/bigwinds/arangodb
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2019 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Tobias Gödderz
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_BASICS_OVERLOAD_H
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#define ARANGODB_BASICS_OVERLOAD_H 1
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namespace arangodb {
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/**
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* @brief Construct an overloaded callable from multiple callables.
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*/
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template<class... Ts> struct overload : Ts... { using Ts::operator()...; };
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template<class... Ts> overload(Ts...) -> overload<Ts...>;
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/*
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* Usage example:
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*
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* std::variant<int, float> intOrFloat { 0.0f };
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* std::visit(overload {
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* [](int const& i) { ... },
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* [](float const& f) { ... },
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* },
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* intOrFloat;
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* );
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*/
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}
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#endif // ARANGODB_BASICS_OVERLOAD_H
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