id summary reporter owner description type status milestone component version severity resolution keywords cc 2761 Array::static_size needs to be cast to int in adapted array_iterator.hpp Stjepan Rajko Joel de Guzman "The line: BOOST_MPL_ASSERT_RELATION(Pos, <=, Array::static_size); Can cause: /boost/boost/fusion/adapted/array/array_iterator.hpp:29: error: 'boost::array::' is/uses anonymous type /boost/boost/fusion/adapted/array/array_iterator.hpp:29: error: trying to instantiate 'template struct boost::fusion::detail::enable_comparison' Casting Array::static_size to int solves the problem. See: http://www.nabble.com/-fusion--mpl--array--making-boost-array-a-conforming-mpl-sequence-(through-fusion)-td21940889.html " Bugs closed Boost 1.39.0 fusion Boost 1.38.0 Problem fixed