beman::optional::optional::or_else

or_else overloads

Synopses

Declared in <beman/optional/optional.hpp>

Returns an optional containing the contained value if it has one, or the result of applying f to the optional if it does not.

template<class F>
constexpr
optional<T>
or_else(F&& f) const &;

Returns an optional containing the contained value if it has one, or the result of calling f if it does not.

template<class F>
constexpr
optional<T>
or_else(F&& f) &&;

Name	Description
F	An invocable type returning an optional.

Name	Description
f	The invocable to call if the optional is disengaged.