code::ConstDynamicCast< FromClass > Class Template Reference

List of all members.

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Detailed Description

template<class FromClass>
class code::ConstDynamicCast< FromClass >

Will dynamic cast one const* pointer into another const* pointer.

Background:
In C++, the following dynamic cast is not valid:

     const BaseClass* base = ...;
     const SubClass* sub = dynamic_cast<const SubClass*>( base );
     

Such a cast is needed at many places. So, this class makes such a cast possible.

Typical Usage:

     const FromClass* base = ...;
     const ToClass* sub = ConstDynamicCast<FromClass>(base).get<ToClass>();
     

Author:

Lakshman

Version:

Id

code_ConstDynamicCast.h,v 1.3 2009/06/02 20:17:39 lakshman Exp

Public Member Functions
	ConstDynamicCast (const FromClass *from_ptr)
	Create an object ready for dynamic casting with get().
template<class ToClass>
const ToClass *	get () const
	Dynamic cast to the class ToClass.

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Constructor & Destructor Documentation

template<class FromClass>

code::ConstDynamicCast< FromClass >::ConstDynamicCast

(

const FromClass *

from_ptr

)

[inline]

Create an object ready for dynamic casting with get().

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Member Function Documentation

template<class FromClass>

template<class ToClass>

const ToClass* code::ConstDynamicCast< FromClass >::get

(

)

const [inline]

Dynamic cast to the class ToClass.

Returns:

0 on error and a valid ToClass pointer on success.

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