Any Class Reference

An Any class represents a general type and is capable of storing any type, supporting type-safe extraction of the internally stored data. More...

Public Member Functions
	Any ()
	Creates an empty any type. More...
template<typename ValueType >
	Any (const ValueType &value)
	Creates an Any which stores the init parameter inside. More...
	Any (const Any &other)
	Copy constructor, works with empty Anys and initialized Any values. More...
	~Any ()
Any &	Swap (Any &rhs)
	Swaps the content of the two Anys. More...
template<typename ValueType >
Any &	operator= (const ValueType &rhs)
	Assignment operator for all types != Any. More...
Any &	operator= (const Any &rhs)
	Assignment operator for Any. More...
bool	Empty () const
	returns true if the Any is empty More...
std::string	ToString () const
	Returns a string representation for the content. More...
const std::type_info &	Type () const
	Returns the type information of the stored content. More...

Friends
template<typename ValueType >
ValueType *	any_cast (Any *)
	any_cast operator used to extract the ValueType from an Any*. More...
template<typename ValueType >
ValueType *	unsafe_any_cast (Any *)

Detailed Description

An 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 1.46.1 library. Original copyright by Kevlin Henney. Modified for CppMicroServices.

Constructor & Destructor Documentation

Any::Any ( )

inline

Creates an empty any type.

Referenced by operator=().

template<typename ValueType >

Any::Any ( const ValueType &  value )

inline

Creates an Any which stores the init parameter inside.

Parameters

value

The content of the Any

Example:

* Any a(13);
* Any a(string("12345"));
* 

Any::Any ( const Any &  other )

inline

Copy constructor, works with empty Anys and initialized Any values.

Parameters

other

The Any to copy

Any::~Any ( )

inline

Member Function Documentation

bool Any::Empty ( ) const

inline

returns true if the Any is empty

template<typename ValueType >

Any& Any::operator= ( const ValueType &  rhs )

inline

Assignment operator for all types != Any.

Parameters

rhs	The value which should be assigned to this Any.

Example:

* Any a = 13;
* Any a = string("12345");
* 

References Any().

Any& Any::operator= ( const Any &  rhs )

inline

Assignment operator for Any.

Parameters

rhs	The Any which should be assigned to this Any.

References Any().

Any& Any::Swap ( Any &  rhs )

inline

Swaps the content of the two Anys.

Parameters

rhs	The Any to swap this Any with.

std::string Any::ToString ( ) const

inline

Returns a string representation for the content.

Custom types should either provide a std::ostream& operator<<(std::ostream& os, const CustomType& ct) function or specialize the any_value_to_string template function for meaningful output.

const std::type_info& Any::Type ( ) const

inline

Returns the type information of the stored content.

If the Any is empty typeid(void) is returned. It is suggested to always query an Any for its type info before trying to extract data via an any_cast/ref_any_cast.

Friends And Related Function Documentation

template<typename ValueType >

ValueType* any_cast ( Any *  operand )

friend

any_cast operator used to extract the ValueType from an Any*.

Will return a pointer to the stored value.

Example Usage:

* MyType* pTmp = any_cast<MyType*>(pAny)
* 

Will return NULL if the cast fails, i.e. types don't match.

template<typename ValueType >

ValueType* unsafe_any_cast ( Any *  operand )

friend