Re: [Boost-users] phoenix vs. python

Subject: Re: [Boost-users] phoenix vs. python
From: Dave Abrahams (dave_at_[hidden])
Date: 2011-03-03 10:20:29

At Thu, 03 Mar 2011 09:05:03 -0500,
Neal Becker wrote:
> 
> Can I use phoenix lambda in boost::python?  Let's see:
> ------------------------------------
> #include <boost/python/module.hpp>
> #include <boost/python/def.hpp>
> #include <boost/spirit/home/phoenix.hpp>
> 
> namespace bp=boost::python;
> 
> BOOST_PYTHON_MODULE (test_phoenix) {
>   bp::def ("test1", &boost::phoenix::val(1));
> }
> ----------------------------------------
> 
> Any suggestions?  Here's what gcc-4.5 says:

Do the Boost.Python docs say you can wrap pointers to arbitrary
function objects that way?  I seriously doubt it.  Part of the reason
it can't work is that you're passing a pointer (pointers to actual
functions are special) and part is that phoenix functions are
compile-time polymorphic and take an arbitrary number of arguments.
Boost.Python can't deduce the desired properties of the python
function you want to generate from that.

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