Re: [cdt-dev] Problems with parser

[Andrew Niefer <aniefer@xxxxxxxxxx>]

Unfortunately, at the moment, the default parameters are only considered at
instantiation time if required.

The plan when I get time to work on templates, is basically to assume that
things are compilable and to make a kind of shadow symbol to represent
things we can't know until instatiation.  This will at least allow us to
parse these kinds of declarations.  We would just report errors at
instantiation if things don't turn out as hoped.

I'll have to think on this a little, but you have given me the idea that
for something like content assist, we could use the default parameters to
provide possible completion suggestions when there otherwise would have
been none.

I don't think there's an update site for 2.0.1 builds, but you can download
zips from http://download.eclipse.org/tools/cdt/builds/2.1.0

-Andrew

cdt-dev-admin@xxxxxxxxxxx wrote on 08/24/2004 11:24:00 AM:

> Andrew Niefer wrote:
>
>
> > I did fix a defect related to classes inheriting from template
parameters
> > (71410), the fix is in head and the 2.0.1 stream.
> >
> > In general we have problems  with code patterns that contain
assumptions
> > about what a template parameter is before we actually instantiate the
> > template (60307).
> >       template < class T > class B {
> >           typedef typename T::myInt int_type;
> >       };
> > This compiles as long as you instantiate the template with something
that
> > contains a myInt.
>
>
> Granted, but what do you do in case a default parameter is provided?
>
> I have lots of templates following some sort of policy based design. I
> have classes which inherit from a class provided from a template
> parameter. I do have defaults for these parameters, but to me it looks
> like cdt can't / won't take that into account when parsing these
templates.
>
> I know, its impossible to know what to do in the source of this "upper"
> class since you cannot know what it will inherit from when its
> instantiated, but I do provide defaults ..
>
>
> Aw, I'll give this 2.0.1 version a try, is there a way to get it through
>   the online update?
>
> kind regards Philip
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