std::experimental::any_cast (3) - Linux Manuals

std::experimental::any_cast: std::experimental::any_cast

NAME

std::experimental::any_cast - std::experimental::any_cast

Synopsis

template<class ValueType> (1) (library fundamentals TS)
ValueType any_cast(const any& operand);
template<class ValueType> (2) (library fundamentals TS)
ValueType any_cast(any& operand);
template<class ValueType> (3) (library fundamentals TS)
ValueType any_cast(any&& operand);
template<class ValueType> (4) (library fundamentals TS)
const ValueType* any_cast(const any* operand) noexcept;
template<class ValueType> (5) (library fundamentals TS)
ValueType* any_cast(any* operand) noexcept;

Performs type-safe access to the contained object.
For (1-3), the program is ill-formed if ValueType is not a reference and std::is_copy_constructible<ValueType>::value is false.

Parameters

operand - target any object

Return value

1) Returns *any_cast<std::add_const_t<std::remove_reference_t<ValueType>>>(&operand).
2-3) Returns *any_cast<std::remove_reference_t<ValueType>>(&operand).
4-5) If operand is not a null pointer, and the typeid of the requested ValueType matches that of the contents of operand, a pointer to the value contained by operand, otherwise a null pointer.

Exceptions

1-3) Throws bad_any_cast if the typeid of the requested ValueType does not match that of the contents of operand.