| 1 | // Copyright Louis Dionne 2013-2022 |
|---|---|
| 2 | // Distributed under the Boost Software License, Version 1.0. |
| 3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) |
| 4 | |
| 5 | #include <boost/hana/assert.hpp> |
| 6 | #include <boost/hana/bool.hpp> |
| 7 | #include <boost/hana/equal.hpp> |
| 8 | #include <boost/hana/find_if.hpp> |
| 9 | #include <boost/hana/functional/always.hpp> |
| 10 | #include <boost/hana/integral_constant.hpp> |
| 11 | #include <boost/hana/optional.hpp> |
| 12 | #include <boost/hana/string.hpp> |
| 13 | namespace hana = boost::hana; |
| 14 | |
| 15 | |
| 16 | int main() { |
| 17 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 18 | hana::find_if(BOOST_HANA_STRING(""), hana::always(hana::true_c)), |
| 19 | hana::nothing |
| 20 | )); |
| 21 | |
| 22 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 23 | hana::find_if(BOOST_HANA_STRING("abcd"), hana::equal.to(hana::char_c<'a'>)), |
| 24 | hana::just(hana::char_c<'a'>) |
| 25 | )); |
| 26 | |
| 27 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 28 | hana::find_if(BOOST_HANA_STRING("abcd"), hana::equal.to(hana::char_c<'c'>)), |
| 29 | hana::just(hana::char_c<'c'>) |
| 30 | )); |
| 31 | |
| 32 | BOOST_HANA_CONSTANT_CHECK(hana::equal( |
| 33 | hana::find_if(BOOST_HANA_STRING("abcd"), hana::equal.to(hana::char_c<'d'>)), |
| 34 | hana::just(hana::char_c<'d'>) |
| 35 | )); |
| 36 | } |
| 37 |