Re: [Boost-users] Need a method to compare types of data objects at runtime

On Sun, 24 Apr 2005 14:46:22 -0400, Stephen Torri wrote

...snip...

Each item expect a distinctive input type. If it receives something that it does not know how to handle or need I want to throw an error.

In order to do this I would like to do something like:

void process (Base* sobj) { if (! (isExpectedType(sobj)) { throw NotForMeException (); }

Brake_Pedal* bp = dynamic_cast(sobj); bp.set_pressure (50); }

So perhaps my design is flawed that I am running into this situation.

I'd say so. You might want to read about the Liskov Substitution Principle: http://www.objectmentor.com/resources/articles/lsp.pdf Jeff