ceph/src/boost/libs/hana/test/string/find_if.cpp

   1 // Copyright Louis Dionne 2013-2016
   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 }