mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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115 lines
3.4 KiB
C++
115 lines
3.4 KiB
C++
#ifndef SPROUT_TUPLE_TUPLE_COMPARISON_HPP
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#define SPROUT_TUPLE_TUPLE_COMPARISON_HPP
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#include <cstddef>
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#include <sprout/config.hpp>
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#include <sprout/tuple/tuple.hpp>
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namespace sprout {
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namespace tuples {
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//
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// operator==
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// operator<
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// operator!=
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// operator>
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// operator>=
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// operator<=
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//
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namespace detail {
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template<std::size_t CheckEqualSize, std::size_t I, std::size_t J, typename T, typename U>
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struct tuple_compare;
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template<std::size_t I, typename T, typename U>
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struct tuple_compare<0, I, I, T, U> {
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public:
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static SPROUT_CONSTEXPR bool eq(T const&, U const&) {
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return true;
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}
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static SPROUT_CONSTEXPR bool less(T const&, U const&) {
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return false;
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}
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};
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template<std::size_t I, std::size_t J, typename T, typename U>
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struct tuple_compare<0, I, J, T, U> {
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public:
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static SPROUT_CONSTEXPR bool eq(T const& t, U const& u) {
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return (sprout::tuples::get<I>(t) == sprout::tuples::get<I>(u)
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&& sprout::tuples::detail::tuple_compare<0, I + 1, J, T, U>::eq(t, u))
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;
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}
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static SPROUT_CONSTEXPR bool less(T const& t, U const& u) {
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return (sprout::tuples::get<I>(t) < sprout::tuples::get<I>(u))
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|| (!(sprout::tuples::get<I>(u) < sprout::tuples::get<I>(t))
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&& sprout::tuples::detail::tuple_compare<0, I + 1, J, T, U>::less(t, u)
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)
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;
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}
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};
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} // namespace detail
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template<typename... TTypes, typename... UTypes>
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inline SPROUT_CONSTEXPR bool operator==(
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sprout::tuples::tuple<TTypes...> const& lhs,
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sprout::tuples::tuple<UTypes...> const& rhs
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)
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{
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typedef sprout::tuples::tuple<TTypes...> T;
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typedef sprout::tuples::tuple<UTypes...> U;
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return sprout::tuples::detail::tuple_compare<
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sprout::tuples::tuple_size<T>::value - sprout::tuples::tuple_size<U>::value,
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0,
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sprout::tuples::tuple_size<T>::value,
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T,
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U
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>::eq(lhs, rhs);
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}
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template<typename... TTypes, typename... UTypes>
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inline SPROUT_CONSTEXPR bool operator<(
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sprout::tuples::tuple<TTypes...> const& lhs,
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sprout::tuples::tuple<UTypes...> const& rhs
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)
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{
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typedef sprout::tuples::tuple<TTypes...> T;
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typedef sprout::tuples::tuple<UTypes...> U;
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return sprout::tuples::detail::tuple_compare<
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sprout::tuples::tuple_size<T>::value - sprout::tuples::tuple_size<U>::value,
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0,
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sprout::tuples::tuple_size<T>::value,
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T,
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U
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>::less(lhs, rhs);
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}
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template<typename... TTypes, typename... UTypes>
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inline SPROUT_CONSTEXPR bool operator!=(
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sprout::tuples::tuple<TTypes...> const& lhs,
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sprout::tuples::tuple<UTypes...> const& rhs
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)
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{
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return !(lhs == rhs);
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}
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template<typename... TTypes, typename... UTypes>
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inline SPROUT_CONSTEXPR bool operator>(
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sprout::tuples::tuple<TTypes...> const& lhs,
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sprout::tuples::tuple<UTypes...> const& rhs
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)
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{
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return rhs < lhs;
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}
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template<typename... TTypes, typename... UTypes>
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inline SPROUT_CONSTEXPR bool operator<=(
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sprout::tuples::tuple<TTypes...> const& lhs,
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sprout::tuples::tuple<UTypes...> const& rhs
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)
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{
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return !(rhs < lhs);
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}
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template<typename... TTypes, typename... UTypes>
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inline SPROUT_CONSTEXPR bool operator>=(
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sprout::tuples::tuple<TTypes...> const& lhs,
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sprout::tuples::tuple<UTypes...> const& rhs
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)
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{
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return !(lhs < rhs);
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}
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} // namespace tuples
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} // namespace sprout
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#endif // #ifndef SPROUT_TUPLE_TUPLE_COMPARISON_HPP
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