Standard library header

From Get docs
Cpp/docs/latest/header/any


Standard library header

This header is part of the general utility library.

Classes

Name Description

any

(C++17)

Objects that hold instances of any CopyConstructible type.

(class)

(C++17)

exception thrown by the value-returning forms of any_cast on a type mismatch

(class)

Functions

(C++17)

specializes the std::swap algorithm

(function)

(C++17)

type-safe access to the contained object

(function template)

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<U> il, Args&& ...args);
  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;
}

Class std::bad_any_cast

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

Class std::any

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

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
http://en.cppreference.com/w/cpp/header/any