[C++-sig] bpl_utils explained

[Ralf W. Grosse-Kunstleve]

--- David Abrahams <dave at boost-consulting.com> wrote:
> > Now say std::vector<int> is class 1 & 2 convertible, and
> > std::vector<double> only class 2. If the object to be converted
> > is a wrapped std::vector<int> it will be converted class 1,
> > otherwise the overload tried first will be used.
> 
> That would be nice, but it ain't so. If the vector<double> overload is
> tried first it will match, and overload resolution will stop there.

Ouch.

Please forgive me, but I still feel I can protect myself from confusing
situations due to the "naive" overload resolution mechanism by restricting the
from_python_sequence converters to lists, tuples, iterators and xranges. For
the time being. To be relaxed once the overload resolution mechanism is
enhanced. Does that make sense as an interim approach?

Ralf


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