My first (and very small) mlc patch ever :). Index: ChangeLog from Ugo Jardonnet &lt;ugo.jardonnet(a)lrde.epita.fr&gt; Add : mlc_is_not_const. * mlc/cmp.hh: Fix. cmp.hh | 7 +++++++ 1 file changed, 7 insertions(+) Index: mlc/cmp.hh --- mlc/cmp.hh (revision 938) +++ mlc/cmp.hh (working copy) @@ -65,6 +65,7 @@ # define mlc_is_not_builtin(T) mlc::is_not_builtin_< T > # define mlc_is_const(T) mlc::is_const_< T > +# define mlc_is_not_const(T) mlc::is_not_const_< T > # define mlc_is_reference(T) mlc::is_reference_< T > /// \} @@ -230,9 +231,15 @@ struct is_const_< const T > : public bexpr_<true> { }; + + template <typename T> + struct is_not_const_ : public not_< is_const_<T> >::bexpr + { + }; /// \} + /// Check whether a type is a reference. /// \{ template <typename T>