# Experimental library header <experimental/any>

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< cpp‎ | header‎ | experimental

This header is part of the Library Fundamentals TS (v1, v2).

### Classes

Name | Description
bad_any_cast (library fundamentals TS) | exception that is thrown by a failed `any_cast`. (class)
any (library fundamentals TS) | Objects that hold instances of any type that satisfies the `ValueType` requirements. (class)

### Functions

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

### Synopsis

    namespace std {
    namespace experimental {
    inline namespace fundamentals_v1 {

      class bad_any_cast : public bad_cast
      {
      public:
        virtual const char* what() const noexcept;
      };

      class any
      {
      public:
        // 6.3.1, any construct/destruct
        any() noexcept;

        any(const any& other);
        any(any&& x) noexcept;

        template <class ValueType>
            any(ValueType&& value);

        ~any();

        // 6.3.2, any assignments
        any& operator=(const any& rhs);
        any& operator=(any&& rhs) noexcept;

        template <class ValueType>
          any& operator=(ValueType&& rhs);

        // 6.3.3, any modifiers
        void clear() noexcept;
        void swap(any& rhs) noexcept;

        // 6.3.4, any observers
        bool empty() const noexcept;
        const type_info& type() const noexcept;
      };

      // 6.4, Non-member functions
      void swap(any& x, any& y) noexcept;

      template<class ValueType>
        ValueType any_cast(const any& operand);
      template<class ValueType>
        ValueType any_cast(any& operand);
      template<class ValueType>
        ValueType any_cast(any&& operand);

      template<class ValueType>
        const ValueType* any_cast(const any* operand) noexcept;
      template<class ValueType>
        ValueType* any_cast(any* operand) noexcept;

    } // namespace fundamentals_v1
    } // namespace experimental
    } // namespace std

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