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

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< cpp‎ | utility

Defined in header `<compare>` |  |
constexpr bool is_eq(std::weak_equality cmp) noexcept; | (1) | (since C++20)
constexpr bool is_neq(std::weak_equality 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 (C++20) | the result type of 3-way comparison that supports all 6 operators, is not substitutable, and allows incomparable values (class)
weak_equality (C++20) | the result type of 3-way comparison that supports only equality/inequality and is not substitutable (class)

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