79c2f0095c
The overloaded_functor class template can be used to encompass multiple lambdas accepting different types into a single callable object that can be used with any of those types. One application is visitors for std::variant where different handling is required for different types. Signed-off-by: Vladimir Krivopalov <vladimir@scylladb.com>
32 lines
1016 B
C++
32 lines
1016 B
C++
/*
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* Copyright (C) 2018 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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/**
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* A helper class to encompass multiple lambdas accepting different input types
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* into a single object.
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*/
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template<typename... Ts> struct overloaded_functor : Ts... { using Ts::operator()...; };
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template<typename... Ts> overloaded_functor(Ts...) -> overloaded_functor<Ts...>;
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