mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
#ifndef SPROUT_TUPLE_FUSED_HPP
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#define SPROUT_TUPLE_FUSED_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/index_tuple.hpp>
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#include <sprout/tuple/tuple.hpp>
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#include <sprout/utility/forward.hpp>
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namespace sprout {
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namespace tuples {
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//
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// fused
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//
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template<typename F>
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class fused {
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public:
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typedef F functor_type;
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private:
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functor_type f_;
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private:
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template<typename Tuple, sprout::index_t... Indexes>
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SPROUT_CONSTEXPR auto
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call(Tuple&& t, sprout::index_tuple<Indexes...>) const
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-> decltype(f_(sprout::tuples::get<Indexes>(sprout::forward<Tuple>(t))...))
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{
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return f_(sprout::tuples::get<Indexes>(sprout::forward<Tuple>(t))...);
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}
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public:
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fused() = default;
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fused(fused const&) = default;
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explicit SPROUT_CONSTEXPR fused(F f)
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: f_(f)
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{}
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SPROUT_CONSTEXPR functor_type functor() const {
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return f_;
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}
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template<typename Tuple>
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SPROUT_CONSTEXPR auto
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operator()(Tuple&& t) const
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-> decltype(this->call(
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sprout::forward<Tuple>(t),
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sprout::index_range<0, sprout::tuples::tuple_size<typename std::decay<Tuple>::type>::value>::make()
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))
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{
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return call(
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sprout::forward<Tuple>(t),
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sprout::index_range<0, sprout::tuples::tuple_size<typename std::decay<Tuple>::type>::value>::make()
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);
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}
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};
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//
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// make_fused
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//
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template<typename F>
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inline SPROUT_CONSTEXPR sprout::tuples::fused<F>
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make_fused(F const& f) {
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return sprout::tuples::fused<F>(f);
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}
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} // namespace tuples
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using sprout::tuples::fused;
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using sprout::tuples::make_fused;
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} // namespace sprout
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#endif // #ifndef SPROUT_TUPLE_FUSED_HPP
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