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/*
This file is part of Android File Transfer For Linux.
Copyright (C) 2015-2020 Vladimir Menshakov
This 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 2.1 of the License,
or (at your option) any later version.
This 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 this library; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef AFTL_MTP_FUNCTION_INVOKER_H
#define AFTL_MTP_FUNCTION_INVOKER_H
#include <functional>
namespace mtp
{
namespace impl
{
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 ...Args>
struct function_invoker
{
std::tuple<Args...> params;
std::function<R (Args...)> func;
R dispatch()
{ return call(typename gens<sizeof...(Args)>::type()); }
template<int ...S>
R call(seq<S...>)
{ return func(std::get<S>(params) ...); }
};
}
template<typename R, typename ... Args, typename TupleType>
void invoke(const std::function<R(Args...)> &func, const TupleType &tuple)
{
impl::function_invoker<R, Args...> invoker = { tuple, func };
invoker.dispatch();
}
}
#endif
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