ceph/src/boost/libs/pfr/test/run/tie_anonymous_const_field.cpp

   1 // Copyright (c) 2020-2022 Antony Polukhin
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include <boost/core/lightweight_test.hpp>
   7
   8 #include <boost/pfr/core.hpp>
   9
  10 #include <string>
  11 #include <typeindex>
  12 #include <type_traits>
  13
  14 namespace testing {
  15
  16 namespace {
  17
  18 struct other_anon {
  19     int data;
  20 };
  21
  22 struct anon {
  23     other_anon a;
  24     const other_anon b;
  25 };
  26
  27 void test_in_anon_ns_const_field() {
  28     anon x{{1}, {2}};
  29
  30     auto v = boost::pfr::structure_tie(x);
  31     using v_type = decltype(v);
  32     using expected_type = std::tuple<other_anon&, const other_anon&>;
  33
  34     // Use runtime check to make sure that Loophole fails to compile structure_tie
  35     BOOST_TEST(typeid(expected_type) == typeid(v_type));
  36 }
  37
  38 } // anonymous namespace
  39
  40 void test_in_non_non_ns_const_field() {
  41     anon x{{1}, {2}};
  42
  43     auto v = boost::pfr::structure_tie(x);
  44     using v_type = decltype(v);
  45     using expected_type = std::tuple<other_anon&, const other_anon&>;
  46
  47     // Use runtime check to make sure that Loophole fails to compile structure_tie
  48     BOOST_TEST(typeid(expected_type) == typeid(v_type));
  49 }
  50
  51 } // namespace testing
  52
  53 int main() {
  54     testing::test_in_anon_ns_const_field();
  55     testing::test_in_non_non_ns_const_field();
  56
  57     return boost::report_errors();
  58 }
  59
  60