// Copyright 2017, 2023 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt

#include <boost/mp11/algorithm.hpp>
#include <boost/mp11/integral.hpp>
#include <boost/mp11/integer_sequence.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>

template<class T, T... I> struct S;

template<char Ch> using mp_char = std::integral_constant<char, Ch>;

int main()
{
    using boost::mp11::mp_list;
    using boost::mp11::mp_list_c;
    using boost::mp11::mp_from_sequence;
    using boost::mp11::mp_int;
    using boost::mp11::mp_size_t;
    using boost::mp11::make_integer_sequence;
    using boost::mp11::make_index_sequence;

    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int>, mp_int<-3>>, mp_list<>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1>, mp_int<-3>>, mp_list<mp_int<-2>>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1, 3>, mp_int<-3>>, mp_list<mp_int<-2>, mp_int<0>>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1, 3, 5>, mp_int<-3>>, mp_list<mp_int<-2>, mp_int<0>, mp_int<+2>>>));

    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<char, 0, 3, 7>, mp_int<'0'>>, mp_list_c<char, '0', '3', '7'>>));

    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 0>, mp_int<-3>>, mp_list<>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 1>, mp_int<-3>>, mp_list<mp_int<-3>>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 2>, mp_int<-3>>, mp_list<mp_int<-3>, mp_int<-2>>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 3>, mp_int<-3>>, mp_list<mp_int<-3>, mp_int<-2>, mp_int<-1>>>));

    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<char, 5>, mp_size_t<'0'>>, mp_list_c<char, '0', '1', '2', '3', '4'>>));

    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<0>, mp_int<4>>, mp_list<>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<1>, mp_int<4>>, mp_list<mp_size_t<4>>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<2>, mp_int<4>>, mp_list<mp_size_t<4>, mp_size_t<5>>>));
    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<3>, mp_int<4>>, mp_list<mp_size_t<4>, mp_size_t<5>, mp_size_t<6>>>));

    return boost::report_errors();
}