std::experimental::optional::operatorbool (3) Linux Manual Page

std::experimental::optional<T>::operatorbool – std::experimental::optional<T>::operatorbool

Synopsis

constexpr explicit operator bool() const noexcept; (library fundamentals TS)
Checks whether *this contains a value.

Parameters

(none)

Return value

true if *this contains a value, false if *this does not contain a value.