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std::pair<T1,T2>::operator=

From cppreference.com
< cpp‎ | utility‎ | pair
 
C++
 
Utilities library
General utilities
Relational operators (deprecated in C++20)
 
std::pair
 
(1)
pair& operator=( const pair& other );
 (until C++20)
constexpr pair& operator=( const pair& other );
 (since C++20)
constexpr const pair& operator=( const pair& other ) const;
 (2) (since C++23)
(3)
template< class U1, class U2 >
pair& operator=( const pair<U1, U2>& other );
 (until C++20)
template< class U1, class U2 >
constexpr pair& operator=( const pair<U1, U2>& other );
 (since C++20)
template< class U1, class U2 >
constexpr const pair& operator=( const pair<U1, U2>& other ) const;
 (4) (since C++23)
(5)
pair& operator=( pair&& other ) noexcept(/* see below */);
 (since C++11)
(until C++20)
constexpr pair& operator=( pair&& other ) noexcept(/* see below */);
 (since C++20)
constexpr const pair& operator=( pair&& other ) const;
 (6) (since C++23)
(7)
template< class U1, class U2 >
pair& operator=( pair<U1, U2>&& p );
 (since C++11)
(until C++20)
template< class U1, class U2 >
constexpr pair& operator=( pair<U1, U2>&& p );
 (since C++20)
template< class U1, class U2 >
constexpr const pair& operator=( pair<U1, U2>&& p ) const;
 (8) (since C++23)
template< pair-like P >
constexpr pair& operator=( P&& u );
 (9) (since C++23)
template< pair-like P >
constexpr const pair& operator=( P&& u ) const;
 (10) (since C++23)

Replaces the contents of the pair.

1) Copy assignment operator. Replaces the contents with a copy of the contents of other.

The assignment operator is implicitly declared. Using this assignment operator makes the program ill-formed if either T1 or T2 is a const-qualified type, or a reference type, or a class type with an inaccessible copy assignment operator, or an array type of such class.

(until C++11)

This overload is defined as deleted if either std::is_copy_assignable<T1>::value or std::is_copy_assignable<T2>::value is false.

(since C++11)
2) Copy assignment operator for const-qualified operand.
This overload participates in overload resolution only if std::is_copy_assignable_v<const T1> and std::is_copy_assignable_v<const T2> are both true.
3) Assigns other.first to first and other.second to second.

This overload participates in overload resolution only if std::is_assignable<T1&, const U1&>::value and std::is_assignable<T2&, const U2&>::value are both true.

(since C++11)
4) Assigns other.first to first and other.second to second.
This overload participates in overload resolution only if std::is_assignable_v<const T1&, const U1&> and std::is_assignable_v<const T2&, const U2&> are both true.
5) Move assignment operator. Replaces the contents with those of other using move semantics.
This overload participates in overload resolution only if std::is_move_assignable<T1>::value and std::is_move_assignable<T2>::value are both true.
6) Move assignment operator for const-qualified operand.
This overload participates in overload resolution only if std::is_assignable_v<const T1&, T1> and std::is_assignable_v<const T2&, T2> are both true.
7) Assigns std::forward<U1>(p.first) to first and std::forward<U2>(p.second) to second.
This overload participates in overload resolution only if std::is_assignable<T1&, U1>::value and std::is_assignable<T2&, U2>::value are both true.
8) Assigns std::forward<U1>(p.first) to first and std::forward<U2>(p.second) to second.
This overload participates in overload resolution only if