SOURCE_FILE
  ENUM
    ENUM_KW "enum"
    WHITESPACE " "
    NAME
      IDENT "E"
    WHITESPACE " "
    VARIANT_LIST
      L_CURLY "{"
      WHITESPACE " "
      VARIANT
        NAME
          IDENT "X"
        TUPLE_FIELD_LIST
          L_PAREN "("
          TUPLE_FIELD
            PATH_TYPE
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "i32"
          R_PAREN ")"
        WHITESPACE " "
        EQ "="
        WHITESPACE " "
        CONST_ARG
          LITERAL
            INT_NUMBER "10"
      WHITESPACE " "
      R_CURLY "}"
  WHITESPACE "\n"
