20 General utilities library [utilities]

20.8 Storage for any type [any]

bool has_value() const noexcept;

Returns: true if *this contains an object, otherwise false.

const type_info& type() const noexcept;

Returns: typeid(T) if *this has a contained value of type T, otherwise typeid(void).

[Note 1:

Useful for querying against types known either at compile time or only at runtime.

— end note]