std::is_eq, std::is_neq, std::is_lt, std::is_gt, std::is_lteq, std::is_gteq (original) (raw)

Defined in header
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

[edit] Parameters

cmp - result of 3-way comparison

[edit] Return value

bool result of the corresponding relational operation

[edit] Example

[edit] See also

| | the result type of 3-way comparison that supports all 6 operators, is not substitutable, and allows incomparable values (class) [edit] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |