[C++-sig] Output iterator parameters
David Abrahams
dave at boost-consulting.com
Fri Feb 17 05:20:58 CET 2006
François Duranleau <duranlef at iro.umontreal.ca> writes:
> Hi!
>
> I have a few functions/member functions to export to Python that pose me
> some problems. They all take at least an output iterator as a parameter,
> e.g.:
>
> template < typename OutputIterator >
> OutputIterator
> nearest_neighbors( const sample_set& s ,
> std::size_t k_nearest ,
> OutputIterator out )
> {
> // ...
> return out ;
> }
>
> In a previous thread about 'optimizing away calls to the python runtime',
> I also mentioned a similar problem with functor arguments. In that case we
> could handle it using boost::function and a function converting (actually,
> wrapping) Python callable objects to boost::function objects. But we do
> not have such an abstraction class for iterators, although maybe it could
> be possible to write one. Bar that, what could I do? Some "solutions" I
> can see so far are:
See any_iterator in the Adobe open source library.
Aleksey, maybe meta-comm should contribute its versions to the
iterator library. We keep getting requests for it. What do you
think?
--
Dave Abrahams
Boost Consulting
www.boost-consulting.com
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