Standard library header  (C++17) (original) (raw)

This header is part of the general utility library.

[edit] Synopsis

namespace std { // class bad_any_cast class bad_any_cast;   // class any class any;   // non-member functions void swap(any& x, any& y) noexcept;   template<class T, class... Args> any make_any(Args&&... args); template<class T, class U, class... Args> any make_any(initializer_list il, Args&&... args);   template T any_cast(const any& operand); template T any_cast(any& operand); template T any_cast(any&& operand);   template const T* any_cast(const any* operand) noexcept; template T* any_cast(any* operand) noexcept; }

[edit] Class std::bad_any_cast

namespace std { class bad_any_cast : public bad_cast { public: // see [exception] for the specification of the special member functions const char* what() const noexcept override; }; }

[edit] Class std::any

namespace std { class any { public: // construction and destruction constexpr any() noexcept;   any(const any& other); any(any&& other) noexcept;   template any(T&& value);   template<class T, class... Args> explicit any(in_place_type_t, Args&&...); template<class T, class U, class... Args> explicit any(in_place_type_t, initializer_list, Args&&...);   ~any();   // assignments any& operator=(const any& rhs); any& operator=(any&& rhs) noexcept;   template any& operator=(T&& rhs);   // modifiers template<class T, class... Args> decay_t& emplace(Args&&...); template<class T, class U, class... Args> decay_t& emplace(initializer_list, Args&&...); void reset() noexcept; void swap(any& rhs) noexcept;   // observers bool has_value() const noexcept; const type_info& type() const noexcept; }; }