id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
10933	"Boost.Python incomplete type in ""contains"""	a.huebl@…	Stefan Seefeld	"Hi,

I am compiling Boost.Python with '''nvcc/6.5''', '''gcc/4.6.2''', '''python/2.7.8''' and '''cmake/3.0.1''' right now.

As a side note, I modified the standard ''FindPythonLibs.cmake'' a bit to match the ''cuda_add_library calls''.

During compile, I get the error

{{{
boost/python/object_core.hpp(499): error: function ""boost::python::api::object_operators<U>::attr(const char *) const"" returns incomplete type ""boost::python::api::const_object_attribute""
}}}

from ''include/boost/python/object_core.hpp''
{{{
template <typename U>
template <class T>
object api::object_operators<U>::contains(T const& key) const
{
    return this->attr(""__contains__"")(object(key));
}
}}}

Replacing the return statement with
{{{
    return (*this)[object(key)];
}}}
seems to compile and my modules work, but I am not sure if the functionality is still ok since I have no idea what this function actually does (nor how to test/trigger it).

It would be great if we can fix that compile error and someone could give me a review."	Bugs	new	To Be Determined	python USE GITHUB	Boost 1.57.0	Showstopper		nvcc python compile