std::optional<T>::operator bool, std::optional<T>::has_value
constexpr explicit operator bool() const noexcept; | (since C++17) | |
constexpr bool has_value() const noexcept; | (since C++17) |
Checks whether *this contains a value.
Parameters
(none).
Return value
true if *this contains a value, false if *this does not contain a value.
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