edition = "2023";

package a;

enum C1 {
  C1_ZERO = 0;
}

enum C2 {
  C2_ZERO = 0;
}

enum C3 {
  C3_ZERO = 0;
}

enum C4 {
  option features.enum_type = CLOSED;
  C4_ZERO = 0;
}

enum C5 {
  option features.enum_type = CLOSED;
  C5_ZERO = 0;
}

enum C6 {
  option features.enum_type = CLOSED;
  C6_ZERO = 0;
}
