Re: [boost] [python] [concept] CallPolicies implementation

Subject: Re: [boost] [python] [concept] CallPolicies implementation
From: Dave Abrahams (dave_at_[hidden])
Date: 2011-12-15 07:20:40

on Sun Dec 04 2011, Lorenzo Caminiti <lorcaminiti-AT-gmail.com> wrote:

> Hello all,
>
> Does Boost.Python implement the CallPolicies concept? I couldn't find it...
> http://www.boost.org/doc/libs/1_48_0/libs/python/doc/v2/CallPolicies.html

AFAIK there are no concept-checking classes for Boost.Python.

> If not, would something like this be OK??
>
> template<class P>
> struct CallPolicies
> {
>     BOOST_CONCEPT_ASSERT((ResultConverterGenerator<P::result_converter>));
>     BOOST_CONCEPT_ASSERT((Metafunction<P::extract_return_type>))
>
>     BOOST_CONCEPT_USAGE(CallPolicies)
>     {
>         bool b = x.precall(a); // convertible to bool
>         PyObject* o = x.postcall(a, r); // convertible to PyObject*
>     }
>
> private:
>     P x;
>     PyObject* a;
>     PyObject* r;
> };

I suppose so.

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com