Function main

sample/customDs.cpp:72–79

static_assert(dsByMember(DummyStruct{2, "123"}) == std::string_view{"123"});

int32_t main()
{
  std::cout << getSecond(DummyStruct{1, "123"}) << std::endl;
  std::cout << dsByMember(DummyStruct{1, "123"}) << std::endl;
  std::cout << getSecond(DummyStruct{2, "123"}) << std::endl;
  std::cout << dsByMember(DummyStruct{2, "123"}) << std::endl;
  return 0;
}