Dv::Any Class Reference

An Any object can hold any kind of value. More...

#include <any.h>

Collaboration diagram for Dv::Any:

[legend]

List of all members.

Classes
struct	AbstractObject
struct	Object
Public Member Functions
	Any ()
	~Any ()
	Any (const Any &a)
template<typename T >
	Any (const T &t)
	Constructor.
	Any (const char *s)
	Constructor for const char* objects.
const std::type_info &	type () const
	Return type of value in Any object.
bool	null () const
	Does this object contain a value?
Private Member Functions
template<typename T >
	Any (const T *)
	Forbid Any values containing pointers.
Private Attributes
AbstractObject *	it_
Friends
template<typename U >
U *	any_cast (const Any *any)
	Convert an Any object to its underlying value type.

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Detailed Description

An Any object can hold any kind of value.

This class is inspired by boost::any_cast but without the typical boost bloat.

Definition at line 13 of file any.h.

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Constructor & Destructor Documentation

Dv::Any::Any

(

)

[inline]

Definition at line 15 of file any.h.

Dv::Any::~Any

(

)

[inline]

Definition at line 16 of file any.h.

References it_.

Dv::Any::Any

(

const Any &

a

)

[inline]

Definition at line 17 of file any.h.

template<typename T >

Dv::Any::Any

(

const T &

t

)

[inline]

Constructor.

You can stuff an object of any type, except pointer types, in an Any object. However, const char* are converted to std::string values before storing them.

Parameters:

t

value of a non-pointer type, or of type const char*

Definition at line 25 of file any.h.

Dv::Any::Any

(

const char *

s

)

[inline]

Constructor for const char* objects.

Parameters:

s

value to store in an Any object.

Definition at line 30 of file any.h.

template<typename T >

Dv::Any::Any

(

const T *

)

[inline, private]

Forbid Any values containing pointers.

Use e.g. vectors. Except const char*, see above.

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Member Function Documentation

const std::type_info& Dv::Any::type

(

)

const [inline]

Return type of value in Any object.

This almost only be used for comparing with another typeid(T).

Returns:

type info on value in this object

Definition at line 36 of file any.h.

References it_, and Dv::Any::AbstractObject::type().

bool Dv::Any::null

(

)

const [inline]

Does this object contain a value?

Returns:

true iff this object does not contain a value.

Definition at line 40 of file any.h.

References it_.

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Friends And Related Function Documentation

template<typename U >

U* any_cast

(

const Any *

any

)

[friend]

Convert an Any object to its underlying value type.

Parameters:

any

pointer to an Any object to convert to type T

Returns:

pointer to underlying T-value or 0 if none (including if type mismatch)

Definition at line 47 of file any.h.

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Member Data Documentation

AbstractObject* Dv::Any::it_ [private]

Definition at line 74 of file any.h.

Referenced by null(), type(), and ~Any().

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The documentation for this class was generated from the following file:

• any.h