/*
 * Copyright Louis Dionne 2014
 * Distributed under the Boost Software License, Version 1.0.
 *         (See accompanying file LICENSE.md or copy at
 *             http://www.boost.org/LICENSE_1_0.txt)
 */

#include <boost/hana/list.hpp>

#include <boost/hana/detail/constexpr.hpp>
#include <boost/hana/detail/static_assert.hpp>
#include <boost/hana/integral.hpp>
using namespace boost::hana;


template <int ...i>
BOOST_HANA_CONSTEXPR_LAMBDA auto ilist = list_c<int, i...>;

constexpr struct _odd {
    template <typename I>
    constexpr auto operator()(I i) const { return i % int_<2> != int_<0>; }
} odd{};

int main() {
    BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<>) == ilist<>);
    BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<0>) == ilist<>);
    BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<0, 2>) == ilist<>);

    BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<0, 1, 3>) == ilist<>);
    BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<1, 0, 3>) == ilist<1>);
    BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<1, 3, 0>) == ilist<1, 3>);
    BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<1, 3, 0, 2>) == ilist<1, 3>);
}