diff options
Diffstat (limited to 'libstdc++-v3/include/bits/stl_multimap.h')
| -rw-r--r-- | libstdc++-v3/include/bits/stl_multimap.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/libstdc++-v3/include/bits/stl_multimap.h b/libstdc++-v3/include/bits/stl_multimap.h index d38f530e123..65f4d0117a4 100644 --- a/libstdc++-v3/include/bits/stl_multimap.h +++ b/libstdc++-v3/include/bits/stl_multimap.h @@ -1065,10 +1065,17 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER operator==(const multimap<_K1, _T1, _C1, _A1>&, const multimap<_K1, _T1, _C1, _A1>&); +#if __cpp_lib_three_way_comparison + template<typename _K1, typename _T1, typename _C1, typename _A1> + friend __detail::__synth3way_t<pair<const _K1, _T1>> + operator<=>(const multimap<_K1, _T1, _C1, _A1>&, + const multimap<_K1, _T1, _C1, _A1>&); +#else template<typename _K1, typename _T1, typename _C1, typename _A1> friend bool operator<(const multimap<_K1, _T1, _C1, _A1>&, const multimap<_K1, _T1, _C1, _A1>&); +#endif }; #if __cpp_deduction_guides >= 201606 @@ -1104,7 +1111,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER multimap(initializer_list<pair<_Key, _Tp>>, _Allocator) -> multimap<_Key, _Tp, less<_Key>, _Allocator>; -#endif +#endif // deduction guides /** * @brief Multimap equality comparison. @@ -1122,6 +1129,27 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER const multimap<_Key, _Tp, _Compare, _Alloc>& __y) { return __x._M_t == __y._M_t; } +#if __cpp_lib_three_way_comparison + /** + * @brief Multimap ordering relation. + * @param __x A `multimap`. + * @param __y A `multimap` of the same type as `x`. + * @return A value indicating whether `__x` is less than, equal to, + * greater than, or incomparable with `__y`. + * + * This is a total ordering relation. It is linear in the size of the + * maps. The elements must be comparable with @c <. + * + * See `std::lexicographical_compare_three_way()` for how the determination + * is made. This operator is used to synthesize relational operators like + * `<` and `>=` etc. + */ + template<typename _Key, typename _Tp, typename _Compare, typename _Alloc> + inline __detail::__synth3way_t<pair<const _Key, _Tp>> + operator<=>(const multimap<_Key, _Tp, _Compare, _Alloc>& __x, + const multimap<_Key, _Tp, _Compare, _Alloc>& __y) + { return __x._M_t <=> __y._M_t; } +#else /** * @brief Multimap ordering relation. * @param __x A %multimap. @@ -1166,6 +1194,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER operator>=(const multimap<_Key, _Tp, _Compare, _Alloc>& __x, const multimap<_Key, _Tp, _Compare, _Alloc>& __y) { return !(__x < __y); } +#endif // three-way comparison /// See std::multimap::swap(). template<typename _Key, typename _Tp, typename _Compare, typename _Alloc> |