40 lines
830 B
C++
40 lines
830 B
C++
//
|
|
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
#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
|