ceph/src/boost/libs/hana/test/concept/struct/member_function.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/for_each.hpp>
   7 #include <boost/hana/fuse.hpp>
   8 #include <boost/hana/fwd/accessors.hpp>
   9 #include <boost/hana/pair.hpp>
  10 #include <boost/hana/string.hpp>
  11 #include <boost/hana/tuple.hpp>
  12
  13 #include <string>
  14 namespace hana = boost::hana;
  15
  16
  17 //
  18 // Unit test inspired by http://stackoverflow.com/q/32678647/627587
  19 //
  20
  21 struct Foo {
  22     std::string get_name() const { return "louis"; }
  23 };
  24
  25 namespace boost { namespace hana {
  26     template <>
  27     struct accessors_impl<Foo> {
  28         static auto apply() {
  29             return hana::make_tuple(
  30                 hana::make_pair(BOOST_HANA_STRING("get_name"), [](auto const& foo) {
  31                     return foo.get_name();
  32                 })
  33             );
  34         }
  35     };
  36 }}
  37
  38 int main() {
  39     Foo foo;
  40     hana::for_each(foo, hana::fuse([](auto /*key*/, std::string const& name) {
  41         BOOST_HANA_RUNTIME_CHECK(name == "louis");
  42     }));
  43 }