libs/hana/example/sequence/searchable.cpp

   1 // Copyright Louis Dionne 2013-2017
   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/contains.hpp>
   7 #include <boost/hana/core/is_a.hpp>
   8 #include <boost/hana/equal.hpp>
   9 #include <boost/hana/find_if.hpp>
  10 #include <boost/hana/optional.hpp>
  11 #include <boost/hana/tuple.hpp>
  12
  13 #include <string>
  14 namespace hana = boost::hana;
  15 using namespace std::string_literals;
  16
  17
  18 int main() {
  19     BOOST_HANA_RUNTIME_CHECK(
  20         hana::find_if(hana::make_tuple(1, '2', 3.3, "abc"s), hana::is_a<std::string>) == hana::just("abc"s)
  21     );
  22
  23     BOOST_HANA_RUNTIME_CHECK(
  24         "abc"s ^hana::in^ hana::make_tuple(1, '2', 3.3, "abc"s)
  25     );
  26 }