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- // Copyright Louis Dionne 2013-2017
- // 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 <boost/hana/assert.hpp>
- #include <boost/hana/drop_while.hpp>
- #include <boost/hana/equal.hpp>
- #include <boost/hana/integral_constant.hpp>
- #include <boost/hana/less.hpp>
- #include <boost/hana/negate.hpp>
- #include <boost/hana/range.hpp>
- #include <boost/hana/tuple.hpp>
- namespace hana = boost::hana;
- using namespace hana::literals;
- auto negative = [](auto x) {
- return x < hana::int_c<0>;
- };
- BOOST_HANA_CONSTANT_CHECK(
- hana::drop_while(hana::make_range(hana::int_c<-3>, hana::int_c<6>), negative)
- ==
- hana::make_range(hana::int_c<0>, hana::int_c<6>)
- );
- BOOST_HANA_CONSTANT_CHECK(
- hana::drop_while(hana::make_tuple(1_c, -2_c, 4_c, 5_c), negative)
- ==
- hana::make_tuple(1_c, -2_c, 4_c, 5_c)
- );
- int main() { }
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