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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/contains.hpp>
- #include <boost/hana/drop_while.hpp>
- #include <boost/hana/integral_constant.hpp>
- #include <boost/hana/is_empty.hpp>
- #include <boost/hana/string.hpp>
- namespace hana = boost::hana;
- int main() {
- BOOST_HANA_CONSTANT_CHECK(!hana::is_empty(BOOST_HANA_STRING("abcd")));
- BOOST_HANA_CONSTANT_CHECK(hana::is_empty(BOOST_HANA_STRING("")));
- BOOST_HANA_CONSTANT_CHECK(BOOST_HANA_STRING("abcd")[hana::size_c<2>] == hana::char_c<'c'>);
- auto is_vowel = [](auto c) {
- return c ^hana::in^ BOOST_HANA_STRING("aeiouy");
- };
- BOOST_HANA_CONSTANT_CHECK(
- hana::drop_while(BOOST_HANA_STRING("aioubcd"), is_vowel) == BOOST_HANA_STRING("bcd")
- );
- }
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