[pythran] Re: gmp

  • From: serge Guelton <serge.guelton@xxxxxxxxxxxxxxxx>
  • To: pythran@xxxxxxxxxxxxx
  • Date: Sun, 28 Oct 2012 09:26:09 +0100

On Sat, Oct 27, 2012 at 11:56:21PM +0200, serge Guelton wrote:
> > >Does it mean we have to make all arguments assignable ?
> > 
> > The problem is not with assignable. For now, when we have a
> > __gmp_expr<T,G>, Assignable say : "ho, I have a specialisation which
> > say it is a mpz_class" but in fact, is is not really a mpz_class. It
> > is for exemple a __gmp_expr<mpz_struct,
> > gmp_binary<__gmp_expr<mpz_struct,mpz_struct>,double,binary_plus> >
> > or something like this.
> > As you can see, in fact this is the result of an addition between a
> > double and a mpz_class and it should be a mpf_class because we can
> > see a double in this expression. But it should be more complicated
> > otherwise gmp developper may have fix this problem isn't it?
> 
> OK I got it. Pythran cast the result to long and python to float,
> because we do not try to expand the __gmp_expr...

ISTM that __gmp_resolve_ref::ref_type is the way to go.

-- 
serge

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