std::experimental::any (3) - Linux Man Pages

std::experimental::any: std::experimental::any

NAME

std::experimental::any - std::experimental::any

Synopsis


Defined in header <experimental/any>
class any; (library fundamentals TS)


The class any describes a type-safe container for single values of any type.
1) An object of class any stores an instance of any type that satisfies the constructor requirements or is empty, and this is referred to as the state of the class any object. The stored instance is called the contained object. Two states are equivalent if they are either both empty or if both are not empty and if the contained objects are equivalent.
2) The non-member any_cast functions provide type-safe access to the contained object.
Implementations are encouraged to avoid dynamic allocations for small objects, but such an optimization may only be applied to types that for which std::is_nothrow_move_constructible returns true.

Member functions


              constructs an any object
constructor (public member function)
              assigns an any object
operator= (public member function)
              destroys an any object
destructor (public member function)

Modifiers


              destroys contained object
clear (public member function)
              swaps two any objects
swap (public member function)

Observers


              checks if object holds a value
empty (public member function)
              returns the typeid of the contained value
type (public member function)

Non-member functions


         swaps two any instances
swap (function)
         type-safe access to the contained object
any_cast (function template)

Helper classes


bad_any_cast exception thrown by the value-returning forms of any_cast on a type mismatch
                          (class)
(library fundamentals TS)