RE: [Mingw-users] I'm trying to port some code from VC++ to Mingw

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: Ioannis Vranos [mailto:no...@ho...] 
> Sent: Friday, June 21, 2002 1:48 AM
> To: 'Min...@li...'
> Subject: RE: [Mingw-users] I'm trying to port some code from 
> VC++ to Mingw
> 
> 
> > -----Original Message-----
> > From: Garrett Serack [mailto:gs...@ex...] 
> > Sent: Friday, June 21, 2002 12:36 AM
> > To: Min...@li...
> > Cc: Ioannis Vranos
> > Subject: Re: [Mingw-users] I'm trying to port some code from 
> > VC++ to Mingw
> > 
> > Oh I completely understand. Were this starting from 
> scratch, I would 
> > tend to do things a quite a bit different.I think I've missed 
> > explaining 
> > some of the stuff around it.
> > 
> > There is an extremely large codebase on Visual C++ that works 
> > quite fine 
> > here. I'm hoping to port it across to GCC on Windows first, 
> and then 
> > possilby onto Linux once it's functioning nicely there.
> > 
> > This existing codebase predates the STL by a smidgen. Heck, 
> a rather 
> > large portion predates 32 bit Windows. The core code runs on 
> > OS/2(!!!) 
> > and Windows, and still cross complies between the two.
> > 
> > Whilst I could go around fixing up thse types of operations, 
> > it would be 
> > much more convenient if GCC would bend a little. Both the 
> > MSVC++(6 and 
> > 7) don't have any trouble with the existing code, and VisualAge C++ 
> > compiles it just fine too. Although I haven't checked, rumor 
> > has it that 
> > it compiles fine under Watcom too :)
> > 
> > I'll try it out on the Intel compiler next, and see what 
> that's doing.
> 
> 
> Well it is a good thing the compiler asks you what you mean. 
> The code is indeed an error because of ambiguity. I find it 
> strange it compiles anywhere.
> 
> 
> Try to solve the ambiguities by direct calls to the constructors.


Ok i found what the real problem is.

The copy constructor is ptr( &ptr). But this is not good for
temporaries. A reference to a temporary is illegal. However temporaries
can be pointed by const references.

So make the constructor:

ptr( const ptr& a )
    {
       _p = a._p;
    }

and everything will be happy.



Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
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