SOURCE_FILE
  STRUCT
    STRUCT_KW "struct"
    WHITESPACE " "
    NAME
      IDENT "S"
    WHITESPACE " "
    RECORD_FIELD_LIST
      L_CURLY "{"
      WHITESPACE " "
      RECORD_FIELD
        NAME
          IDENT "f"
      WHITESPACE " "
      RECORD_FIELD
        VISIBILITY
          PUB_KW "pub"
        WHITESPACE " "
        NAME
          IDENT "g"
        COLON ":"
        WHITESPACE " "
        TUPLE_TYPE
          L_PAREN "("
          R_PAREN ")"
      WHITESPACE " "
      R_CURLY "}"
  WHITESPACE "\n"
error 12: expected COLON
error 12: expected type
error 12: expected COMMA
