// Copyright 2018 James E. King III. Use, modification and // distribution is subject to the Boost Software License, Version // 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) #include int main(int, char*[]) { using boost::logic::tribool; tribool t(true); return t < 1; // expect to see: error: invalid operands to binary expression ('boost::logic::tribool' and 'int') }