< cpp‎ | experimental‎ | any
Technical specifications
Filesystem library (filesystem TS)
Library fundamentals (library fundamentals TS)
Library fundamentals 2 (library fundamentals 2 TS)
Extensions for parallelism (parallelism TS)
Extensions for parallelism 2 (parallelism TS v2)
Extensions for concurrency (concurrency TS)
Concepts (concepts TS)
Ranges (ranges TS)
Special mathematical functions (special math TR)
Member functions
Non-member functions
any() noexcept;
(1) (library fundamentals TS)
any( const any& other );
(2) (library fundamentals TS)
any( any&& other ) noexcept;
(3) (library fundamentals TS)
template<typename ValueType>
    any( ValueType&& value );
(4) (library fundamentals TS)

Constructs a new any object.

1) Constructs an empty object.
2-3) Copies (2) or moves (3) content of other into a new instance, so that any content is equivalent in both type and value to those of other prior to the constructor call, or empty if other is empty.
4) Constructs an object with initial content an object of type std::decay_t<ValueType>, direct-initialized from std::forward<ValueType>(value). If std::is_copy_constructible<std::decay_t<ValueType>>::value is false, the program is ill-formed. This overload only participates in overload resolution if std::decay_t<ValueType> is not the same type as any.

Template parameters

ValueType - contained value type
Type requirements
std::decay_t<ValueType> must meet the requirements of CopyConstructible.


other - another any object to copy or move from
value - value to initialize the contained value with


2,4) Throws any exception thrown by the constructor of the contained type.

See also

assigns an any object
(public member function)