typeid

[moleskyca1]

If I use RTTI, will every class have a typeid info? I am confused. When
does compiler generate this info? Is it at run-time or at compile time?


What if I have a template class, or the STL classes, will they also
have typeid info?

 

[Alf P. Steinbach]

* (e-mail address removed):

If I use RTTI, will every class have a typeid info?

Not necessarily, and doesn't necessarily depend on whether you use RTTI
or not.

I am confused. When
does compiler generate this info? Is it at run-time or at compile time?

The RTTI information itself is generated at compile time. The
association from object to RTTI information is necessarily generated at
run-time.

What if I have a template class, or the STL classes, will they also
have typeid info?

All classes support typeid. For actual run-time determination of type
the statically known class for an object must have at least one virtual
member function.