Function any

Function any_cast

boost::any_cast — Custom keyword cast for extracting a value of a given type from an any.

Synopsis

// In header: <boost/any.hpp>


template<typename T> T any_cast(any & operand);
template<typename T> T any_cast(const any & operand);
template<typename ValueType> const ValueType * any_cast(const any * operand);
template<typename ValueType> ValueType * any_cast(any * operand);

Description

Returns:	If passed a pointer, it returns a similarly qualified pointer to the value content if successful, otherwise null is returned. If T is ValueType, it returns a copy of the held value, otherwise, if T is a reference to (possibly const qualified) ValueType, it returns a reference to the held value.
Throws:	Overloads taking an `any` pointer do not throw; overloads taking an `any` value or reference throws `bad_any_cast` if unsuccessful.