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/*
This file is part of the Tweeny library.
Copyright (c) 2016-2018 Leonardo G. Lucena de Freitas
Copyright (c) 2016 Guilherme R. Costa
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/* This file contains code to help call a function applying a tuple as its arguments.
* This code is private and not documented. */
#ifndef TWEENY_DISPATCHER_H
#define TWEENY_DISPATCHER_H
#include <tuple>
namespace tweeny {
namespace detail {
template<int ...> struct seq { };
template<int N, int ...S> struct gens : gens<N - 1, N - 1, S...> { };
template<int ...S> struct gens<0, S...> {
typedef seq<S...> type;
};
template<typename R, typename Func, typename TupleType, int ...S>
R dispatch(Func && f, TupleType && args, seq<S...>) {
return f(std::get<S>(args) ...);
}
template<typename R, typename Func, typename... Ts>
R call(Func && f, const std::tuple<Ts...> & args) {
return dispatch<R>(f, args, typename gens<sizeof...(Ts)>::type());
}
}
}
#endif //TWEENY_DISPATCHER_H
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