std::basic_common_referencestd::pair - cppreference.com (original) (raw)
| | | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | ------------- | | template< class T1, class T2, class U1, class U2, template<class> class TQual, template<class> class UQual > requires requires { typename std::pair<std::common_reference_t<TQual<T1>, UQual<U1>>, std::common_reference_t<TQual<T2>, UQual<U2>>>; } struct basic_common_reference<std::pair<T1, T2>, std::pair<U1, U2>, TQual, UQual>; | | (since C++23) |
The common reference type of two pairs is a pair of both common reference types of corresponding element types of both pairs, where the cv and reference qualifiers on the pairs are applied to their element types.
The common reference type is defined only if both pairs of corresponding element types have common reference types.