| /*============================================================================= |
| Copyright (c) 2001-2007 Joel de Guzman |
| Copyright (c) 2014 John Fletcher |
| |
| Distributed under 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 <cmath> |
| #include <boost/function.hpp> |
| #include <boost/phoenix/core.hpp> |
| #include <boost/phoenix/operator.hpp> |
| #include <boost/phoenix/stl/cmath.hpp> |
| #include <boost/detail/lightweight_test.hpp> |
| |
| int main() |
| { |
| double eps = 0.000001; |
| using namespace boost::phoenix::arg_names; |
| boost::function<bool(double, double)> f = boost::phoenix::fabs(_1 - _2) < eps; |
| |
| double x = boost::phoenix::pow(_1,_2)(2.,2.); |
| double y = boost::phoenix::atan2(_1,_2)(1.,1.); |
| double z = boost::phoenix::tan(_1)(y); |
| |
| BOOST_TEST(f(0.0, 0 * eps)); |
| BOOST_TEST(!f(0.0, eps)); |
| BOOST_TEST(std::fabs(x-4.) < eps ); |
| BOOST_TEST(std::fabs(z-1.) < eps ); |
| } |