20 General utilities library [utilities]

20.8 Storage for any type [any]

20.8.3 Class any [any.class]

20.8.3.4 Observers [any.observers]

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 object of type T, otherwise typeid(void).

Note: Useful for querying against types known either at compile time or only at runtime.  — end note ]