beman::optional::operator<=>

Three‐way comparison of an optional against a value.

Synopsis

Declared in <beman/optional/optional.hpp>

template<
    typename T,
    typename U>
requires (!is_derived_from_optional<U>) && std::three_way_comparable_with<T, U>
constexpr
std::compare_three_way_result_t<T, U>
operator<=>(
    optional<T> const& x,
    U const& v);

Return Value

The comparison category; a disengaged optional orders before v.

Parameters

Name

Description

The optional operand.

The value operand.

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