// Copyright Louis Dionne 2013-2016 // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) #include #include #include #include #include namespace hana = boost::hana; constexpr auto xs = hana::make_tuple(0, '1', 2.0); static_assert(hana::drop_front_exactly(xs, hana::size_c<1>) == hana::make_tuple('1', 2.0), ""); static_assert(hana::drop_front_exactly(xs, hana::size_c<2>) == hana::make_tuple(2.0), ""); BOOST_HANA_CONSTANT_CHECK(hana::drop_front_exactly(xs, hana::size_c<3>) == hana::make_tuple()); // drop_front_exactly(xs) is equivalent to drop_front_exactly(xs, size_t<1>) static_assert(hana::drop_front_exactly(xs) == hana::make_tuple('1', 2.0), ""); int main() { }