message: Use CONSTDATA in function parse making compiler without constexpr support happy
diff: @@ -5165,25 +5165,25 @@ parse(std::basic_istream<CharT, Traits>& is,
  const CharT* command = nullptr;
  auto modified = CharT{};
  auto width = -1;
  - constexpr int not_a_year = 33000;
  + CONSTDATA int not_a_year = 33000;
  int Y = not_a_year;
  - constexpr int not_a_century = not_a_year / 100;
  + CONSTDATA int not_a_century = not_a_year / 100;
  int C = not_a_century;
  - constexpr int not_a_2digit_year = 100;
  + CONSTDATA int not_a_2digit_year = 100;
  int y = not_a_2digit_year;
  int m{};
  int d{};
  int j{};
  - constexpr int not_a_weekday = 7;
  + CONSTDATA int not_a_weekday = 7;
  int wd = not_a_weekday;
  - constexpr int not_a_hour_12_value = 0;
  + CONSTDATA int not_a_hour_12_value = 0;
  int I = not_a_hour_12_value;
  hours h{};
  minutes min{};
  Duration s{};
  int g = not_a_2digit_year;
  int G = not_a_year;
  - constexpr int not_a_week_num = 100;
  + CONSTDATA int not_a_week_num = 100;
  int V = not_a_week_num;
  int U = not_a_week_num;
  int W = not_a_week_num;
  