bsl::operator<=>

Synopsis

Declared in <bslstl_optional.h>

template<class t_TYPE>
constexpr
std::strong_ordering
operator<=>(
    bsl::optional<t_TYPE> const& value,
    bsl::nullopt_t nullopt) noexcept;

Description

Perform a three-way comparison of the specified value and nullopt; return the result of that comparison. This function can be called in constant expressions only if t_TYPE is not allocator-aware.

Return Value

result of the three-way comparison

Parameters

Name	Description
value	value compared with or used to initialize the optional
nullopt	disengaged-optional tag; value is unused