RWAny

Module:  Essential Tools Module   Group:  Miscellaneous Classes

Does not inherit

• Local Index
• Synopsis
• Description
• Persistence
• Public Constructors
• Public Member Functions

Members

address() get()

operator=() RWAny<T>()

RWAny() swap()

type()

#include <rw/any.h>
RWAny a;

RWAny encapsulates an object of an arbitrary type; it can:

• store objects of arbitrary types (by value or by pointer)

• retrieve the original object in a "type-safe" manner

• swap the object with another RWAny

• assign objects of type RWAny

Requirements for types held by RWAny are:

• the type must be complete

• the type must be copy constructible

• the type must be assignable

None

RWAny()

Default constructor. Creates an empty object. Post-condition: for any T, (address<T>() == 0).

RWAny(const RWAny& ref)

Copy constructor. Creates a deep copy of the argument.

template<class T>
RWAny<T>(const T& ref);

Template constructor for type any holding T. Creates RWAny object holding a deep copy of argument ref.

RWAny&
operator=(const RWAny& ref);

Assignment operator. Deep-copies the argument. Returns reference to self.

RWAny&
swap(RWAny& ref);

Implements a swap operation. After the swap, this object will contain the old content of the argument and vice versa.

const STD::type_info*
type() const;

Implements type retrieval. Returns &typeid (T) if any holds object of type T or 0 otherwise.

template<class T> T&
get();
template<class T> const T&
get() const;

Implements value retrieval. Returns *address<T>() if T is the type of the object stored in any or throws an exception of type (or derived of), bad_cast, otherwise.

template<class T> T*
address();
template<class T> const T*
address() const;

Implements address retrieval. Returns the address of the object held in any or 0 if the object is not of the type requested.

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