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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/find.hpp>
- #include <boost/hana/integral_constant.hpp>
- #include <boost/hana/optional.hpp>
- #include <boost/hana/string.hpp>
- namespace hana = boost::hana;
- struct invalid { };
- int main() {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::find(BOOST_HANA_STRING("abcd"), hana::char_c<'a'>),
- hana::just(hana::char_c<'a'>)
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::find(BOOST_HANA_STRING("abcd"), hana::char_c<'c'>),
- hana::just(hana::char_c<'c'>)
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::find(BOOST_HANA_STRING("abcd"), invalid{}),
- hana::nothing
- ));
- }
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