template< class... Args > iterator emplace( Args&&.

template< class R, class... Args > void swap( function<R(Args

Introduces a name that is defined elsewhere into the declarative region where this using-declaration appears.

Defined in header

Queries information of a type. Used where the dynamic type of a polymorphic object must be known and for static type identification.

Defined in header

bool expired() const;

Defines an expression that can be evaluated at compile

native_handle_type native_handle();