mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
#ifndef SPROUT_TUPLE_ALGORITHM_COPY_HPP
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#define SPROUT_TUPLE_ALGORITHM_COPY_HPP
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#include <cstddef>
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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/traits.hpp>
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#include <sprout/tuple/functions.hpp>
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namespace sprout {
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namespace tuples {
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namespace result_of {
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//
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// copy
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//
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template<typename Tuple, typename InputTuple>
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struct copy {
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public:
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typedef typename sprout::tuples::tuple_traits<Tuple>::clone_type type;
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};
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} // namespace result_of
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namespace detail {
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template<typename Result, typename Tuple, typename InputTuple, std::ptrdiff_t... Indexes1, std::ptrdiff_t... Indexes2>
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SPROUT_CONSTEXPR inline Result copy_impl(
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Tuple const& t,
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InputTuple const& input,
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sprout::index_tuple<Indexes1...>,
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sprout::index_tuple<Indexes2...>
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)
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{
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return sprout::tuples::remake_clone<Result>(
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t,
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sprout::tuples::get<Indexes2>(input)...,
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sprout::tuples::get<Indexes1>(t)...
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);
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}
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template<typename Tuple, typename InputTuple>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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(sprout::tuples::tuple_size<Tuple>::value > sprout::tuples::tuple_size<InputTuple>::value),
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typename sprout::tuples::result_of::copy<Tuple, InputTuple>::type
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>::type copy(
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Tuple const& t,
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InputTuple const& input
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)
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{
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return sprout::tuples::detail::copy_impl<typename sprout::tuples::result_of::copy<Tuple, InputTuple>::type>(
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t,
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input,
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typename sprout::index_range<sprout::tuples::tuple_size<InputTuple>::value, sprout::tuples::tuple_size<Tuple>::value>::type(),
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typename sprout::index_range<0, sprout::tuples::tuple_size<InputTuple>::value>::type()
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);
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}
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template<typename Tuple, typename InputTuple>
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SPROUT_CONSTEXPR inline typename std::enable_if<
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!(sprout::tuples::tuple_size<Tuple>::value > sprout::tuples::tuple_size<InputTuple>::value),
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typename sprout::tuples::result_of::copy<Tuple, InputTuple>::type
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>::type copy(
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Tuple const& t,
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InputTuple const& input
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)
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{
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return sprout::tuples::detail::copy_impl<typename sprout::tuples::result_of::copy<Tuple, InputTuple>::type>(
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t,
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input,
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sprout::index_tuple<>(),
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typename sprout::index_range<0, sprout::tuples::tuple_size<Tuple>::value>::type()
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);
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}
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} // namespace detail
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//
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// copy
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//
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template<typename Tuple, typename InputTuple>
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SPROUT_CONSTEXPR inline typename sprout::tuples::result_of::copy<Tuple, InputTuple>::type copy(
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Tuple const& t,
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InputTuple const& input
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)
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{
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return sprout::tuples::detail::copy(
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t,
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input
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);
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}
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} // namespace tuples
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} // namespace sprout
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#endif // #ifndef SPROUT_TUPLE_ALGORITHM_COPY_HPP
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