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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/equal.hpp>
- #include <boost/hana/integral_constant.hpp>
- #include <boost/hana/less.hpp>
- #include <boost/hana/pair.hpp>
- #include <boost/hana/span.hpp>
- #include <boost/hana/tuple.hpp>
- namespace hana = boost::hana;
- constexpr auto xs = hana::make_tuple(hana::int_c<1>, hana::int_c<2>, hana::int_c<3>, hana::int_c<4>);
- BOOST_HANA_CONSTANT_CHECK(
- hana::span(xs, hana::less.than(hana::int_c<3>))
- ==
- hana::make_pair(hana::make_tuple(hana::int_c<1>, hana::int_c<2>),
- hana::make_tuple(hana::int_c<3>, hana::int_c<4>))
- );
- BOOST_HANA_CONSTANT_CHECK(
- hana::span(xs, hana::less.than(hana::int_c<0>))
- ==
- hana::make_pair(hana::make_tuple(), xs)
- );
- BOOST_HANA_CONSTANT_CHECK(
- hana::span(xs, hana::less.than(hana::int_c<5>))
- ==
- hana::make_pair(xs, hana::make_tuple())
- );
- // span.by is syntactic sugar
- BOOST_HANA_CONSTANT_CHECK(
- hana::span.by(hana::less.than(hana::int_c<3>), xs)
- ==
- hana::make_pair(hana::make_tuple(hana::int_c<1>, hana::int_c<2>),
- hana::make_tuple(hana::int_c<3>, hana::int_c<4>))
- );
- int main() { }
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