1 /*============================================================================= 2 Copyright (c) 2001-2007 Joel de Guzman 3 Copyright (c) 2014 John Fletcher 4 5 Distributed under the Boost Software License, Version 1.0. (See accompanying 6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 7 ==============================================================================*/ 8 9 #include <cmath> 10 #include <boost/function.hpp> 11 #include <boost/phoenix/core.hpp> 12 #include <boost/phoenix/operator.hpp> 13 #include <boost/phoenix/stl/cmath.hpp> 14 #include <boost/core/lightweight_test.hpp> 15 main()16int main() 17 { 18 double eps = 0.000001; 19 using namespace boost::phoenix::arg_names; 20 boost::function<bool(double, double)> f = boost::phoenix::fabs(_1 - _2) < eps; 21 22 double x = boost::phoenix::pow(_1,_2)(2.,2.); 23 double y = boost::phoenix::atan2(_1,_2)(1.,1.); 24 double z = boost::phoenix::tan(_1)(y); 25 26 BOOST_TEST(f(0.0, 0 * eps)); 27 BOOST_TEST(!f(0.0, eps)); 28 BOOST_TEST(std::fabs(x-4.) < eps ); 29 BOOST_TEST(std::fabs(z-1.) < eps ); 30 return boost::report_errors(); 31 } 32