Constructs the value from rhs if it has one.
<beman/optional/optional.hpp>
template<class U>
constexpr
explicit(!std::is_convertible_v<U, T>)
optional(optional<U>&& rhs)
requires (detail::enable_from_other<T, U, U &&>);
Converting move constructor.
| Name | Description |
|---|---|
| rhs | The object to move construct from |