< cpp‎ | utility‎ | pair
Utilities library
Language support
Type support (basic types, RTTI)
Library feature-test macros (C++20)
Dynamic memory management
Program utilities
Coroutine support (C++20)
Variadic functions
Debugging support
Three-way comparison
General utilities
Date and time
Function objects
Formatting library (C++20)
Relational operators (deprecated in C++20)
Integer comparison functions
Swap and type operations
Common vocabulary types
Elementary string conversions

Defined in header <utility>
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.

[edit] Member types

Member type Definition
type std::pair<std::common_reference_t<TQual<T1>, UQual<U1>>,

          std::common_reference_t<TQual<T2>, UQual<U2>>>

[edit] Example

[edit] See also

determines the common reference type of a group of types
(class template) [edit]
determines the common reference type of a tuple and a tuple-like type
(class template specialization) [edit]