dal::ImplicitDowncast< B > Class Template Reference

#include <implicitdowncast.h>

List of all members.

Public Member Functions
	ImplicitDowncast (B &base)
template<typename D >
	operator D & ()

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Detailed Description

template<typename B>
class dal::ImplicitDowncast< B >

ImplicitDowncast< B > returns an object that can implictly be cast to classes derived from B. For example:

 class base {};
 class derived: public base {};

 int main() {
    derived d;
    base *b = &d;

    base    &b2 = ImplicitDowncast<base>(*b);
    derived &d2 = ImplicitDowncast<base>(*b);

    // Without ImplicitDowncast, C++ would require this instead:
    base    &b3 = dynamic_cast<base&>(*b);
    derived &d3 = dynamic_cast<derived&>(*b);
 }

Note that no check is performed whether the cast will be succesful.

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

• /home/amesfoort/DAL/dal/hdf5/types/implicitdowncast.h