apply.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2021 Tobias Hienzsch
 
#ifndef TETL_TUPLE_APPLY_HPP
#define TETL_TUPLE_APPLY_HPP
 
#include <etl/_functional/invoke.hpp>
#include <etl/_tuple/tuple.hpp>
#include <etl/_tuple/tuple_size.hpp>
#include <etl/_type_traits/remove_reference.hpp>
#include <etl/_utility/forward.hpp>
#include <etl/_utility/index_sequence.hpp>
 
namespace etl {
 
template <typename F, typename Tuple>
constexpr auto apply(F&& f, Tuple&& t) -> decltype(auto)
{
    return [&]<etl::size_t... I>(etl::index_sequence<I...> /*i*/) -> decltype(auto) {
        return etl::invoke(etl::forward<F>(f), etl::get<I>(etl::forward<Tuple>(t))...);
    }(etl::make_index_sequence<etl::tuple_size_v<etl::remove_reference_t<Tuple>>>{});
}
 
} // namespace etl
 
#endif // TETL_TUPLE_APPLY_HPP