Re: [Openexr-devel] OpenEXR Windows port

[E. Scott Larsen]

Dustin Graves wrote:
> Luc-Eric Rousseau wrote:
>
> >  > -----Original Message-----
> >  > From: Dustin Graves [mailto:address@hidden
> >  >
> >  > Last night I did a rough port to Windows with Visual Studio 6 + Intel
> >  > 5.0 Compiler.  I was unable to use the compilers provided with both
> >  > Visual Studio 6.0 and .NET because they do not recognize this
> >  > as legal syntax:
> >  >
> >  > template <class T>
> >  > template <class S>
> >  > inline bool
> >  > Vec2<T>::operator != (const Vec2<S> &v) const
> >  > ...
> >  > The template followed by a template causes a syntax error.  This is a
> >  > bug with the compiler, which I'll try reporting to Microsoft.
> >
> > try template <class T, class S>, should be the same
>
>
> I'd tried this, but these actually aren't the same thing.  A template 
> parameter list of a template and its template member cannot be conbined, 
> so there isn't going to be a simple work around for this with the 
> current Microsoft compiler.

exactly right, they're not the same.  The work around is to inline the 
implementation.  ugly, but it works for MSVC.  Eg:
template <class T>
class A {
        template <class S> void f(){
                //code goes here
        }
}
since yes, MS acknoledges that there is no workaround for their bug that 
would not let you do:

template <class T>
class A {
        template <class S> void f();
}
template <class T>
template <class S>
void A<T>::f(){
        //code here
}

this is in some docs on their page somewhere, don't remember.

//Scott
> >  > 3.  std::min and std::max are unavailable (due to conflict
> >  > with min and
> >  > max in windefs.h), so std::_MIN and std::_MAX are provided instead.
> >
> > When you need to include windows.h, use #define NOMINMAX before
> > including it.  See windef.h.  you may also #define WIN32_LEAN_AND_MEAN
> > to speed up compile.
>
>
> The problem here is that std::min and std::max do not seem to exist with 
> VC6.  They are provided with VC .NET, but with VC6 they are renamed to 
> _cpp_min and _cpp_max and then #defined to _MIN and _MAX.
>
>
> >  > 5.  Scoping error with variable declarations within 'for' loops,
> >  > resulting in multiple defines, required variables to be
> >  > declared outside
> >  > of the 'for' loop, once per function.
> >
> > I'm not too fond of the new scoping rule, but you can enable it in
> > VC++ 6.0 with "Disable language extensions", in the compiler settings.
> > It's off by default because it breaks existing code, in some cases
> > silently.
>
>
> This works nicely.  I will update the project files to include this 
> setting.
>
>
>
>
>
>
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