Function main

test/hl.cpp:20–205

using namespace boost::parser;

int main()
{

// for_each
{
    {
        tuple<std::string, int> t{"foo", 4};
        std::ostringstream oss;
        detail::hl::for_each(t, [&](auto x) { oss << x << ' '; });
        BOOST_TEST(get(t, llong<0>{}) == "foo");
        BOOST_TEST(oss.str() == "foo 4 ");
    }
    {
        tuple<std::string, int> t{"foo", 4};
        std::ostringstream oss;
        detail::hl::for_each(std::move(t), [&](auto x) { oss << x << ' '; });
        BOOST_TEST(get(t, llong<0>{}) == "");
        BOOST_TEST(oss.str() == "foo 4 ");
    }
}

// transform
{
    {
        tuple<std::string, int> t{"foo", 4};
        auto t2 = detail::hl::transform(
            t, [&](auto x) { return std::optional<decltype(x)>{x}; });
        BOOST_TEST(get(t, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<0>{}) == std::optional<std::string>{"foo"});
        BOOST_TEST(get(t2, llong<1>{}) == std::optional<int>{4});
    }
    {
        tuple<std::string, int> t{"foo", 4};
        auto t2 = detail::hl::transform(std::move(t), [&](auto x) {
            return std::optional<decltype(x)>{x};
        });
        BOOST_TEST(get(t, llong<0>{}) == "");
        BOOST_TEST(get(t2, llong<0>{}) == std::optional<std::string>{"foo"});
        BOOST_TEST(get(t2, llong<1>{}) == std::optional<int>{4});
    }
}

// fold_left
{
    tuple<std::string, int> t{"foo", 4};
    auto t2 =
        detail::hl::fold_left(t, tuple<>{}, [](auto const & state, auto x) {
            return detail::hl::append(state, x);
        });
    BOOST_TEST(t == t2);
}

// size
{
    {
        tuple<std::string, int> t{"foo", 4};
        BOOST_TEST(detail::hl::size(t).value == 2u);
    }