C++ (Cpp) qi::attr Exemples

Exemple #1

Fichier : attr.cpp Projet : LancelotGHX/Simula

int
main()
{
    using spirit_test::test_attr;
    namespace qi = boost::spirit::qi;

    using qi::attr;
    using qi::double_;

    {
        double d = 0.0;
        BOOST_TEST(test_attr("", attr(1.0), d) && d == 1.0);

        double d1 = 1.0;
        BOOST_TEST(test_attr("", attr(d1), d) && d == 1.0);

        std::pair<double, double> p;
        BOOST_TEST(test_attr("1.0", double_ >> attr(1.0), p) && 
            p.first == 1.0 && p.second == 1.0);

        char c = '\0';
        BOOST_TEST(test_attr("", attr('a'), c) && c == 'a');
        std::string str;
        BOOST_TEST(test_attr("", attr("test"), str) && str == "test");
    }

    {   // testing lazy constructs
        using boost::phoenix::val;
        using boost::phoenix::ref;

        double d = 0.0;
        BOOST_TEST(test_attr("", attr(val(1.0)), d) && d == 1.0);

        double d1 = 2.0;
        BOOST_TEST(test_attr("", attr(ref(d1)), d) && d == 2.0);
    }

    {
        std::string s;
        BOOST_TEST(test_attr("s", "s" >> qi::attr(std::string("123")), s) && 
            s == "123");
    }

    return boost::report_errors();
}