boost_1_45_0/libs/fusion/test/sequence/define_assoc_struct.cpp

/*=============================================================================
    Copyright (c) 2010 Christopher Schmidt

    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/fusion/sequence.hpp>
#include <boost/fusion/container.hpp>
#include <boost/fusion/support.hpp>
#include <boost/fusion/adapted/struct/define_assoc_struct.hpp>
#include <boost/preprocessor/empty.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/static_assert.hpp>
#include <iostream>

namespace ns
{
    struct x_member;
    struct y_member;
    struct z_member;
}

BOOST_FUSION_DEFINE_ASSOC_STRUCT(
    (ns),
    point,
    (int, x, ns::x_member)
    (int, y, ns::y_member)
)

int
main()
{
    using namespace boost::fusion;

    std::cout << tuple_open('[');
    std::cout << tuple_close(']');
    std::cout << tuple_delimiter(", ");

    {
        BOOST_MPL_ASSERT_NOT((traits::is_view<ns::point>));
        ns::point p(123, 456);

        std::cout << at_c<0>(p) << std::endl;
        std::cout << at_c<1>(p) << std::endl;
        std::cout << p << std::endl;
        BOOST_TEST(p == make_vector(123, 456));

        at_c<0>(p) = 6;
        at_c<1>(p) = 9;
        BOOST_TEST(p == make_vector(6, 9));

        BOOST_STATIC_ASSERT(result_of::size<ns::point>::value == 2);
        BOOST_STATIC_ASSERT(!result_of::empty<ns::point>::value);

        BOOST_TEST(front(p) == 6);
        BOOST_TEST(back(p) == 9);
    }

    {
        vector<int, float> v1(4, 2);
        ns::point v2(5, 3);
        vector<long, double> v3(5, 4);
        BOOST_TEST(v1 < v2);
        BOOST_TEST(v1 <= v2);
        BOOST_TEST(v2 > v1);
        BOOST_TEST(v2 >= v1);
        BOOST_TEST(v2 < v3);
        BOOST_TEST(v2 <= v3);
        BOOST_TEST(v3 > v2);
        BOOST_TEST(v3 >= v2);
    }

    {
        // conversion from ns::point to vector
        ns::point p(5, 3);
        vector<int, long> v(p);
        v = p;
    }

    {
        // conversion from ns::point to list
        ns::point p(5, 3);
        list<int, long> l(p);
        l = p;
    }

    {
        // assoc stuff
        BOOST_MPL_ASSERT((result_of::has_key<ns::point, ns::x_member>));
        BOOST_MPL_ASSERT((result_of::has_key<ns::point, ns::y_member>));
        BOOST_MPL_ASSERT((boost::mpl::not_<result_of::has_key<ns::point, ns::z_member> >));

        BOOST_MPL_ASSERT((boost::is_same<result_of::value_at_key<ns::point, ns::x_member>::type, int>));
        BOOST_MPL_ASSERT((boost::is_same<result_of::value_at_key<ns::point, ns::y_member>::type, int>));

        ns::point p(5, 3);
        
        BOOST_TEST(at_key<ns::x_member>(p) == 5);
        BOOST_TEST(at_key<ns::y_member>(p) == 3);
    }

    {
        ns::point p = make_list(5,3);
        BOOST_TEST(p == make_vector(5,3));

        p = make_list(3,5);
        BOOST_TEST(p == make_vector(3,5));
    }

    return boost::report_errors();
}