Re: [boost] [wave] skip include directives

From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2006-05-15 15:53:42

Felipe Magno de Almeida wrote:

> > Felipe Magno de Almeida wrote:
> >
> > > I want to be able to preprocess a file without *needing* 
> the system 
> > > headers. Although, using them is a lot safer.
> >
> > That's the point: To get predictable / correct results you 
> can't skip 
> > processing included files. Anything else is heuristic.
> 
> You can if you know what it do. For instance, I dont need to 
> include a STL header to be able to preprocess a source file. 
> Most headers are safe to not include. Also, I should be able 
> to cache the modified state from a header and do not need to 
> re-preprocess it again for another file.

Wave is quite intelligent wrt skipping include files wherever possible. It
supports the #pragma once directive and uses a heuristic to recognize
standard header guarding schemes to avoid duplicate inclusion of a file. So
there is no need for you worry about that.

Regards Hartmut