Orders a value before an optional with less-than.
Declared in <beman/optional/optional.hpp>
template<
typename T,
typename U>
constexpr
bool
operator<(
T const& lhs,
optional<U> const& rhs)
requires (!detail::is_optional<T>) && detail::optional_lt_rel<T, U>;
true if rhs is engaged and lhs orders before its contained value.
| Name | Description |
|---|---|
| lhs | The value operand. |
| rhs | The optional operand. |