operator==,!=,<,<=,>,>=,<=>(std::queue) - cppreference.com (original) (raw)
| template< class T, class Container > bool operator==( const std::queue<T, Container>& lhs, const std::queue<T, Container>& rhs ); | (1) | |
|---|---|---|
| template< class T, class Container > bool operator!=( const std::queue<T, Container>& lhs, const std::queue<T, Container>& rhs ); | (2) | |
| template< class T, class Container > bool operator< ( const std::queue<T, Container>& lhs, const std::queue<T, Container>& rhs ); | (3) | |
| template< class T, class Container > bool operator<=( const std::queue<T, Container>& lhs, const std::queue<T, Container>& rhs ); | (4) | |
| template< class T, class Container > bool operator> ( const std::queue<T, Container>& lhs, const std::queue<T, Container>& rhs ); | (5) | |
| template< class T, class Container > bool operator>=( const std::queue<T, Container>& lhs, const std::queue<T, Container>& rhs ); | (6) | |
| template< class T, std::three_way_comparable Container > std::compare_three_way_result_t<Container> operator<=>( const std::queue<T, Container>& lhs, const std::queue<T, Container>& rhs ); | (7) | (since C++20) |
Compares the contents of the underlying containers of two container adaptors. The comparison is done by applying the corresponding operator to the underlying containers.
[edit] Parameters
| lhs, rhs | - | container adaptors whose contents to compare |
|---|---|---|
| -T must meet the requirements of EqualityComparable. |
[edit] Return value
1-6) true if the corresponding comparison yields true, false otherwise.
- Result of three-way comparison on underlying containers.
[edit] Complexity
Linear in the size of the container.
[edit] Example
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 410 | C++98 | the semantics of operators !=, >, <= and >= were missing | added |