parser/test/hl.cpp

/**
 *   Copyright (C) 2020 T. Zachary Laine
 *
 *   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/parser/detail/hl.hpp>

#include <optional>
#include <sstream>
#include <tuple>

#include <boost/core/lightweight_test.hpp>


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

// contains
{
    tuple<std::string, int, double> t{"foo", 4, 3.0};
    BOOST_TEST(detail::hl::contains(t, 3.0));
    BOOST_TEST(detail::hl::contains(t, "foo"));
    BOOST_TEST(detail::hl::contains(t, std::string_view("foo")));
    BOOST_TEST(!detail::hl::contains(t, std::string_view("banana")));
}

// front_back
{
    tuple<std::string, int> t{"foo", 4};
    BOOST_TEST(detail::hl::front(t) == "foo");
    BOOST_TEST(detail::hl::back(t) == 4);
}

// drop_front
{
    {
        tuple<std::string, int> t{"foo", 4};
        auto t2 = detail::hl::drop_front(t);
        BOOST_TEST(get(t, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<0>{}) == 4);
    }
    {
        tuple<std::string, int, double> t{"foo", 4, 3.0};
        auto t2 = detail::hl::drop_front(std::move(t));
        BOOST_TEST(get(t, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<0>{}) == 4);
        BOOST_TEST(get(t2, llong<1>{}) == 3.0);
    }
}

// drop_back
{
    {
        tuple<std::string, int> t{"foo", 4};
        auto t2 = detail::hl::drop_back(t);
        BOOST_TEST(get(t, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<0>{}) == "foo");
    }
    {
        tuple<std::string, int, double> t{"foo", 4, 3.0};
        auto t2 = detail::hl::drop_back(std::move(t));
        BOOST_TEST(get(t, llong<0>{}) == "");
        BOOST_TEST(get(t2, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<1>{}) == 4);
    }
}

// first_second
{
    tuple<std::string, int> t{"foo", 4};
    BOOST_TEST(detail::hl::first(t) == "foo");
    BOOST_TEST(detail::hl::second(t) == 4);
}

// append
{
    {
        tuple<std::string> t{"foo"};
        auto t2 = detail::hl::append(t, 4);
        BOOST_TEST(get(t, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<1>{}) == 4);
    }
    {
        tuple<std::string, int> t{"foo", 4};
        auto t2 = detail::hl::append(std::move(t), 3.0);
        BOOST_TEST(get(t, llong<0>{}) == "");
        BOOST_TEST(get(t2, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<1>{}) == 4);
        BOOST_TEST(get(t2, llong<2>{}) == 3.0);
    }
}

// prepend
{
    {
        tuple<std::string> t{"foo"};
        auto t2 = detail::hl::prepend(t, 4);
        BOOST_TEST(get(t, llong<0>{}) == "foo");
        BOOST_TEST(get(t2, llong<0>{}) == 4);
        BOOST_TEST(get(t2, llong<1>{}) == "foo");
    }
    {
        tuple<std::string, int> t{"foo", 4};
        auto t2 = detail::hl::prepend(std::move(t), 3.0);
        BOOST_TEST(get(t, llong<0>{}) == "");
        BOOST_TEST(get(t2, llong<0>{}) == 3.0);
        BOOST_TEST(get(t2, llong<1>{}) == "foo");
        BOOST_TEST(get(t2, llong<2>{}) == 4);
    }
}

// zip
{
    {
        tuple<std::string, int> t1{"foo", 4};
        tuple<double, std::string> t2{3.0, "bar"};
        auto t3 = detail::hl::zip(t1, t2);
        BOOST_TEST(
            get(t3, llong<0>{}) == (tuple<std::string, double>("foo", 3.0)));
        BOOST_TEST(get(t3, llong<1>{}) == (tuple<int, std::string>(4, "bar")));
    }
    {
        tuple<std::string, int> t1{"foo", 4};
        tuple<double, std::string> t2{3.0, "bar"};
        tuple<std::string, std::string> t3{"baz", "baz"};
        auto t4 = detail::hl::zip(t1, t2, t3);
        BOOST_TEST(
            get(t4, llong<0>{}) ==
            (tuple<std::string, double, std::string>("foo", 3.0, "baz")));
        BOOST_TEST(
            get(t4, llong<1>{}) ==
            (tuple<int, std::string, std::string>(4, "bar", "baz")));
    }
}

return boost::report_errors();
}