Re: [Toon-members] TooN slice<0,End<-1>> problem in MSVC++

[Gerhard Reitmayr]

On 2 Nov 2009, at 13:12, E. Rosten wrote:

> On Sat, 31 Oct 2009, Gerhard Reitmayr wrote:
>
> > ok, I have a short term solution :)
> >
> > End is only used in project/unproject functions in TooN. so I  
> > rewrote them to use the general slice functions and put ifdefs  
> > around the slices members with End markers to not be used under  
> > Win32...
> >
> > I will check that in, if that is acceptable for now.
>
> That's fine. I'll delete the feature. I wasn't too fond of it since  
> it required rather nasty evaluation of all available slices.

sure. I also just realized something else, the End<X> notation and the  
usual slice notation use different semantics...

slice<start, length>() vs
slice<start, end_position>()  // End<-1> encodes an end position

not sure how they should be reconciled anyway ?

> Any ideas for a good replacement?

not really. I tried playing around with constructions similar to yours  
but didn't find any.

cheers,
  Gerhard

> -Ed
>
> > cheers,
> > Gerhard
> >
> >
> > On 31 Oct 2009, at 00:22, Gerhard Reitmayr wrote:
> >
> > > Hi guys,
> > > There is a problem with the nice new End<X> notation and MSVC++  
> > > (yeah latest version).
> > > basically, it accepts the construct and swallows the
> > > slice<X, End<Y> >()
> > > but does not resolve the original one
> > > slice<X,Y>()
> > > anymore. It tries to match it against the first one and fails (no  
> > > casting of int to End<Y>).
> > > Basically, the following simple test case fails:
> > > template <int A, int B> int f() { return A; }
> > > template <int X> struct S {};
> > > template <int X> S<X> End();
> > > template <int A, S<2> (*End)() > int f() { return 2; }
> > > void bla(){
> > >  f<1,2>();   // this one doesn't work
> > >  f<1, End<2> >();
> > > }
> > > not sure what to do about this one?
> > > cheers,
> > > Gerhard
> > > --
> > > Gerhard Reitmayr
> > > MIL, Engineering Department, Cambridge University
> > > http://mi.eng.cam.ac.uk/~gr281/
> > > _______________________________________________
> > > Toon-members mailing list
> > > address@hidden
> > > http://lists.nongnu.org/mailman/listinfo/toon-members
> >
> > --
> > Gerhard Reitmayr
> > MIL, Engineering Department, Cambridge University
> > http://mi.eng.cam.ac.uk/~gr281/
> >
> >
> >
> >
> > _______________________________________________
> > Toon-members mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/toon-members
>
> --
> (You can't go wrong with psycho-rats.)(http://mi.eng.cam.ac.uk/~er258)
>
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--
Gerhard Reitmayr
MIL, Engineering Department, Cambridge University
http://mi.eng.cam.ac.uk/~gr281/