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std::common_type<std::pair>

Defined in header <utility> 
template< class T1, class T2, class U1, class U2 >
  requires requires { typename std::pair<std::common_type_t<T1, U1>,
                                         std::common_type_t<T2, U2>>; }
struct common_type<std::pair<T1, T2>, std::pair<U1, U2>>;
 (since C++23)

The common type of two pairs is a pair of both common types of corresponding element types of both pairs.

The common type is defined only if both pairs of corresponding element types have common types.

Member types

Member type Definition
type std::pair<std::common_type_t<T1, U1>, std::common_type_t<T2, U2>>

Example

See also

(C++11)
determines the common type of a group of types
(class template)
(C++23)
determines the common type of a tuple and a tuple-like type
(class template specialization)

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https://en.cppreference.com/w/cpp/utility/pair/common_type