// 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::indeterminate; using boost::logic::tribool; tribool i(indeterminate); return i; // expect to see: error: no viable conversion from returned value of type 'boost::logic::tribool' to function return type 'int' }