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