phoenix/test/operator/arithmetic_tests.cpp

/*=============================================================================
    Copyright (c) 2001-2007 Joel de Guzman

    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 <boost/detail/lightweight_test.hpp>
#include <boost/phoenix/core.hpp>
#include <boost/phoenix/operator.hpp>

using namespace boost::phoenix;
using namespace std;

int
main()
{
    {
        int x = 123;

        BOOST_TEST((ref(x) += 456)(0) == (123 + 456));
        BOOST_TEST(x == 123 + 456);
        BOOST_TEST((ref(x) -= 456)(0) == 123);
        BOOST_TEST(x == 123);
        BOOST_TEST((ref(x) *= 456)(0) == 123 * 456);
        BOOST_TEST(x == 123 * 456);
        BOOST_TEST((ref(x) /= 456)(0) == 123);
        BOOST_TEST(x == 123);

        int& r1 = (ref(x) += 456)(0); // should be an lvalue
        int& r2 = (ref(x) -= 456)(0); // should be an lvalue
        int& r3 = (ref(x) *= 456)(0); // should be an lvalue
        int& r4 = (ref(x) /= 456)(0); // should be an lvalue
        BOOST_TEST(r1 == 123 && r2 == 123 && r3 == 123 && r4 == 123);

        BOOST_TEST((ref(x) %= 456)(0) == 123 % 456);
        BOOST_TEST(x == 123 % 456);
    }

    {
        BOOST_TEST((val(123) + 456)(0) == 123 + 456);
        BOOST_TEST((val(123) - 456)(0) == 123 - 456);
        BOOST_TEST((val(123) * 456)(0) == 123 * 456);
        BOOST_TEST((val(123) / 456)(0) == 123 / 456);
        BOOST_TEST((val(123) % 456)(0) == 123 % 456);

        BOOST_TEST((123 + val(456))(0) == 123 + 456);
        BOOST_TEST((123 - val(456))(0) == 123 - 456);
        BOOST_TEST((123 * val(456))(0) == 123 * 456);
        BOOST_TEST((123 / val(456))(0) == 123 / 456);
        BOOST_TEST((123 % val(456))(0) == 123 % 456);
    }

    return boost::report_errors();
}