NAME¶

std::is_eq,std::is_neq,std::is_lt,std::is_gt,std::is_lteq,std::is_gteq - std::is_eq,std::is_neq,std::is_lt,std::is_gt,std::is_lteq,std::is_gteq

Synopsis¶

Defined in header <compare>
constexpr bool is_eq( std::partial_ordering cmp ) noexcept; (1) (since C++20)
constexpr bool is_neq( std::partial_ordering cmp ) noexcept; (2) (since C++20)
constexpr bool is_lt( std::partial_ordering cmp ) noexcept; (3) (since C++20)
constexpr bool is_lteq( std::partial_ordering cmp ) noexcept; (4) (since C++20)
constexpr bool is_gt( std::partial_ordering cmp ) noexcept; (5) (since C++20)
constexpr bool is_gteq( std::partial_ordering cmp ) noexcept (6) (since C++20)

These functions take a result of 3-way comparison and convert it to the result of
one of the six relational operators

Specifically, these functions return

1) cmp == 0
2) cmp != 0
3) cmp < 0
4) cmp <= 0
5) cmp > 0
6) cmp >= 0

Parameters¶

cmp - result of 3-way comparison

Return value¶

bool result of the corresponding relational operation

Example¶

This section is incomplete
Reason: no example

See also¶

partial_ordering the result type of 3-way comparison that supports all 6 operators,
(C++20) is not substitutable, and allows incomparable values
(class)