tuple-like, pair-like
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template< class T >
concept tuple-like = /* see below */;
(1)
(since C++23) concept tuple-like = /* see below */;
(exposition only*)
template< class T >
(2)
(since C++23) concept pair-like =
(exposition only*)
1) A type
T models and satisfies the concept tuple-like if std::remove_cvref_t <T> is a specialization of
(since C++26)
- std::pair ,
- std::tuple , or
- std::ranges::subrange .
2)
pair-like objects are tuple-like objects with exactly 2 elements.[edit] Notes
tuple-like types implement the tuple protocol, i.e., such types can be used with std::get, std::tuple_element and std::tuple_size.
Elements of tuple-like types can be bound with structured binding.
[edit] See also
tuple-like and pair-like are used in the following standard library components:
(removed in C++20)(removed in C++20)(removed in C++20)(removed in C++20)(removed in C++20)(C++20)
(function template) [edit]
determines the common reference type of a
(class template specialization) [edit]
tuple and a tuple-like type (class template specialization) [edit]
(C++23)
tuple and a tuple-like type (class template specialization) [edit]
converts the
(public member function of
subrange to a pair-like type (public member function of
std::ranges::subrange<I,S,K>) [edit]