message: more tests in unit-udt
diff: @@ -394,15 +394,22 @@ namespace nlohmann
  template <>
  struct adl_serializer<std::vector<float>>
  {
  - static void to_json(json& j, std::vector<float> const&)
  + using type = std::vector<float>;
  + static void to_json(json& j, type const&)
  {
  j = "hijacked!";
  }
  - static void from_json(json const&, std::vector<float>& opt)
  + static void from_json(json const&, type& opt)
  {
  opt = {42.0, 42.0, 42.0};
  }
  +
  + // preferred version
  + static type from_json(json const&)
  + {
  + return {4.0, 5.0, 6.0};
  + }
  };
  }
  @@ -411,7 +418,8 @@ TEST_CASE("even supported types can be specialized", "[udt]")
  json j = std::vector<float> {1.0, 2.0, 3.0};
  CHECK(j.dump() == R"("hijacked!")");
  auto f = j.get<std::vector<float>>();
  - CHECK((f == std::vector<float>{42.0, 42.0, 42.0}));
  + // the single argument from_json method is preferred
  + CHECK((f == std::vector<float>{4.0, 5.0, 6.0}));
  }
  namespace nlohmann
  