DERIVED_FROM_P

[Mike Stump]

On Sep 26, 2005, at 5:25 PM, Humberto Rocha wrote:
> I need know what DERIVED_FROM_P do and How use this...

What part of the comment:

/* Nonzero iff TYPE is derived from PARENT. Ignores accessibility and
    ambiguity issues.  */
#define DERIVED_FROM_P(PARENT, TYPE) \

was unclear?  If you didn't read that comment, you'll want to examine  
the various files in doc/*.texi for documentation, as well as the  
definitions themselves.

> Is there any source code sample?

Yes, please see the gcc source code.