std::pair
Defined in header <utility>
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template< class T1, |
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std::pair
is a struct template that provides a way to store two heterogeneous objects as a single unit. A pair is a specific case of a std::tuple with two elements.
If std::is_trivially_destructible_v<T1> && std::is_trivially_destructible_v<T2> is true, the destructor of |
(since C++17) |
Template parameters
T1, T2 | - | the types of the elements that the pair stores. |
Member types
Member type | Definition |
first_type
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T1
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second_type
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T2
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Member objects
Member name | Type |
first
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T1
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second
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T2
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Member functions
constructs new pair (public member function) | |
assigns the contents (public member function) | |
(C++11) |
swaps the contents (public member function) |
Non-member functions
creates a pair object of type, defined by the argument types (function template) | |
lexicographically compares the values in the pair (function template) | |
(C++11) |
specializes the std::swap algorithm (function template) |
(C++11) |
accesses an element of a pair (function template) |
Helper classes
(C++11) |
obtains the size of a pair (class template specialization) |
obtains the type of the elements of pair (class template specialization) |
Deduction guides(since C++17)
See also
(C++11) |
implements fixed size container, which holds elements of possibly different types (class template) |
creates a tuple of lvalue references or unpacks a tuple into individual objects (function template) |