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ton/tdutils/td/utils/overloaded.h
2019-09-07 14:33:36 +04:00

52 lines
1.3 KiB
C++

/*
This file is part of TON Blockchain Library.
TON Blockchain Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
TON Blockchain Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
Copyright 2017-2019 Telegram Systems LLP
*/
#pragma once
namespace td {
namespace detail {
template <class... Fs>
struct overload;
template <class F>
struct overload<F> : public F {
explicit overload(F f) : F(f) {
}
};
template <class F, class... Fs>
struct overload<F, Fs...>
: public overload<F>
, overload<Fs...> {
overload(F f, Fs... fs) : overload<F>(f), overload<Fs...>(fs...) {
}
using overload<F>::operator();
using overload<Fs...>::operator();
};
} // namespace detail
template <class... F>
auto overloaded(F... f) {
return detail::overload<F...>(f...);
}
} // namespace td