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operator==,!=,<,<=,>,>=,<=>(std::stack)

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Containers library

(C++17)

(C++11)

(C++26)

(C++26)

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(C++11)

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(C++11)

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std::stack

Member functions

stack::operator=

stack::push_range

(C++23)

(C++11)

(C++11)

Non-member functions

swap(std::stack)

(C++11)

operator==operator!=operator<operator>operator<=operator>=operator<=>

(C++20)

uses_allocator<std::stack>

(C++11)

formatter<std::stack>

(C++23)

Deduction guides (C++17)

template< class T, class Container >

bool operator==( const std::stack <T, Container>& lhs,

const std::stack <T, Container>& rhs );

(1)

template< class T, class Container >

bool operator!=( const std::stack <T, Container>& lhs,

const std::stack <T, Container>& rhs );

(2)

template< class T, class Container >

bool operator< ( const std::stack <T, Container>& lhs,

const std::stack <T, Container>& rhs );

(3)

template< class T, class Container >

bool operator<=( const std::stack <T, Container>& lhs,

const std::stack <T, Container>& rhs );

(4)

template< class T, class Container >

bool operator> ( const std::stack <T, Container>& lhs,

const std::stack <T, Container>& rhs );

(5)

template< class T, class Container >

bool operator>=( const std::stack <T, Container>& lhs,

const std::stack <T, Container>& rhs );

(6)

template< class T, std::three_way_comparable Container >

std::compare_three_way_result_t <Container>
operator<=>( const std::stack <T, Container>& lhs,

const std::stack <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.

Contents

[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.

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

[edit] Complexity

Linear in the size of the container.

[edit] Example

This section is incomplete
Reason: no 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 all comparison operators were missing	added

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Todo no example