[boost] what is polymorphic_cast good for?

From: Thorsten Ottosen (nesotto_at_[hidden])
Date: 2003-09-12 22:22:08

>From the documentation:

>The C++ built-in dynamic_cast can be used for downcasts and crosscasts of
pointers to polymorphic objects, but error notification in the form of a
>returned value of 0 is inconvenient to test, or worse yet, easy to forget
to test. The polymorphic_cast template performs a dynamic_cast, and throws
an >exception if the dynamic_cast returns 0.

what is the difference between this and

dynamic_cast<Derived&>( *obj ) ?

Thorsten Ottosen
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