[Opencxx-users] Re: [opencxx] Let's break OpenC++ up

[Grzegorz J. <ja...@he...>]

On Mon, 14 Apr 2003, James Michael DuPont wrote:

>
> --- Stefan Reuther <sr...@ma...> wrote:
> > Hi *.*,
> >
> > On Wed, Mar 19, 2003 at 01:38:26PM +0800, Grzegorz Jakacki wrote:
> > > On Tue, 18 Mar 2003, Stefan Reuther wrote:
> > > > I don't think it can be done much different. Ptree and Walker
> > > > have to "know each other".
> > >
> > > I believe that it is possible to introduce a layer in between,
> > > which would encapsualte the actual implementation of Ptree.
> >
> > Another possibility would be to put that knowledge into the
> > Walker interface. Here, we have such a thing for
> > PtreeDeclaration. Depending upon whether a PtreeDeclaration is a
> > class declaration ("class foo;"), a name declaration ("int x;")
> > or a function implementation ("void x() { }"), it nicely
> > dissects the tree node and calls different functions. "Class"
> > and "ClassWalker" already seem to do some other parts of this.
>
>
> The walker has only one problem.
> It does not only walk, but also has to interpret things.
> It has to know how to extract the data out of the parser
>
> How do you propose to hide the details of the parser from the walker?

I think it is possible by usage of user defined handles instead of
pointers. Pointers reveal actual implementation types used in syntax tree.
User-defined handles do not have to.

Best regards
Grzegorz

>
> mike
>
> =====
> James Michael DuPont
> http://introspector.sourceforge.net/
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Tax Center - File online, calculators, forms, and more
> http://tax.yahoo.com
>
>

##################################################################
# Grzegorz Jakacki                       Huada Electronic Design #
# Senior Engineer, CAD Dept.              1 Gaojiayuan, Chaoyang #
# tel. +86-10-64365577 x2074               Beijing 100015, China #
# Copyright (C) 2002 Grzegorz Jakacki, HED. All Rights Reserved. #
##################################################################