Library: Foundation
Package: Core
Header: Poco/Any.h
Description
Any class represents a general type and is capable of storing any type, supporting type-safe extraction of the internally stored data.
Code taken from the Boost 1.33.1 library. Original copyright by Kevlin Henney. Modified for Poco by Applied Informatics.
Modified for small object optimization support (optionally supported through conditional compilation) by Alex Fabijanic.
Member Summary
Member Functions: empty, local, operator =, swap, type
Constructors
Any 
Any();
Creates an empty any type.
Any
template < typename ValueType > Any(
const ValueType & value
);
Creates an any which stores the init parameter inside.
Example:
Any a(13);
Any a(string("12345"));
Any
Copy constructor, works with both empty and initialized Any values.
Destructor
~Any
~Any();
Destructor. If Any is locally held, calls ValueHolder destructor; otherwise, deletes the placeholder from the heap.
Member Functions
empty
bool empty() const;
Returns true if the Any is empty.
local
bool local() const;
Returns true if data is held locally (ie. not allocated on the heap). If POCO_NO_SOO is defined, it always return false. The main purpose of this function is use for testing.
operator =
template < typename ValueType > Any & operator = (
const ValueType & rhs
);
operator =
Any & operator = (
const Any & rhs
);
Assignment operator for Any.
swap
Any & swap(
Any & other
) noexcept;
Swaps the content of the two Anys.
If an exception occurs during swapping, the program execution is aborted.
type
const std::type_info & type() const;
Returns the type information of the stored content. If the Any is empty typeid(void) is returned. It is recommended to always query an Any for its type info before trying to extract data via an AnyCast/RefAnyCast.