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From: Ralf W. Grosse-Kunstleve (rwgk_at_[hidden])
Date: 2003-03-18 15:34:12

--- Beman Dawes <bdawes_at_[hidden]> wrote:
> At 09:48 AM 3/18/2003, David Abrahams wrote:
> >Gottfried.Ganssauge_at_[hidden] writes:
> >
> >>> it seems to me that these aren't actually legal specializations
> >>> (though I've never specialized functions before so I could be wrong).
> >>> Shouldn't that be:
> >>>
> >>> template <>
> >>> inline type_info type_id<Pointee>(boost::type<Pointee>*) {
> >>> return type_info(typeid(Pointee*));
> >>> }
> >>>
> >>> template <>
> >>> inline type_info type_id<const volatile Pointee&>(
> >>> boost::type<const volatile Pointee&>*) {
> >>> return type_info(typeid(Pointee*));
> >>> }
> >>>
> >> You're probably right, but the other compilers didn't
> >> complain... Anyway, that wasn't the cause of the problem; the
> >> problem seems to be that gcc-2.9x doesn't recognize the defaulted
> >> argument but insists on having an argument anyway. Now i have
> >> changed my specializations such that these have *no* arguments and
> >> now it works on all my compilers (MSVC6, VC7.1ß, gcc-2.95.3,
> >> gcc-3.2).
> >
> >I think we need to keep the argument for VC6 at least; the problem is
> >one that shows up at link time because VC6 seems to distinguish
> >function template instantiations only by the types of the arguments
> >and not the template parameters. If you amend the patch so that it
> >still uses the default argument for VC6, I will be happy for Ralf to
> >apply it.
> >
> >Beman, can we get this in under the wire? It only affects
> >Boost.Python and then only a new feature of Boost.Python.
> Yes, if it is ready in the next couple of hours. Please let me know when it
> is committed.

I have the patch ready to go and it fixes the gcc 2.96 problem. However, I am
in limbo because I am waiting for a word from David. I don't think his concern
above is valid, but I am not certain.

Beman, here is an idea: I could check in the patch now and restart our
multi-platform Boost.Python regression tests. When we hear back from David we
have the results already. Then we can decide what to do based on all the
information that we have.


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