AMDG Edd Dawson wrote:
The following code compiles fine against Boost 1.34.1 and 1.35.0, but apparently not anything later. I've tried 1.36.0 and 1.39.0.
I'm compiling with Microsoft's Visual C++ 2005 and 2009 compilers (the express editions if it matters).
#include <boost/mpl/remove.hpp> #include <boost/mpl/vector.hpp> #include <boost/preprocessor/repetition/enum_params.hpp> #include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(BOOST_MPL_LIMIT_VECTOR_SIZE, typename T, void)> struct X { typedef typename
boost::mpl::vector<BOOST_PP_ENUM_PARAMS(BOOST_MPL_LIMIT_VECTOR_SIZE, T)>::type template_parameters; // mpl::vector of template parameters
typedef typename boost::mpl::remove < template_parameters, void > ::type template_parameters_no_voids; // voids removed };
int main() { X<int> x; return 0; }
The error messages using Boost 1.39.0 and Visual C++ 2005:
<snip>
Is this a problem with more recent versions of Boost, or am I doing something wrong?
It looks like it's complaining because an mpl::vector of maximal static size doesn't implement push_back, but it surely shouldn't need to for a remove operation?
The first problem is that remove is implemented by calling either push_back or push_front on an empty sequence. The error occurs when remove is deciding whether it can use push_back. inserter_algorithm.hpp.patch fixes the problem by calling clear on the argument before running the test. The second problem is that has_push_back is broken. push_back_impl.hpp.patch should fix it. In Christ, Steven Watanabe