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 |
---|---|
(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;
};
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