boostorg/type_traits — pull request #5 by igaztanaga (2014-08-17 23:13:10+00:00)
Title: Fix for MSVC 12.0 std::is_copy_constructible and boost::is_copy_construc...

MSVC 12.0 (Visual 2013) has problems when the copy constructor has been deleted. See:
// https://connect.microsoft.com/VisualStudio/feedback/details/800328/std-is-copy-constructible-is-broken

BOOST_NO_CXX11_DELETED_FUNCTIONS based code seems to return false for those types.