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operator==,!=,<,<=,>,>=,<=>(std::queue) - cppreference.com

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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.

Parameters

lhs, rhs - container adaptors whose contents to compare
-T must meet the requirements of EqualityComparable.

Return value

1-6) true if the corresponding comparison yields true, false otherwise.

7) Result of three-way comparison on underlying containers.

Complexity

Linear in the size of the container.

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