SOURCE_FILE
  TYPE_ALIAS
    TYPE_KW "type"
    WHITESPACE " "
    NAME
      IDENT "T"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    TUPLE_TYPE
      L_PAREN "("
      PATH_TYPE
        PATH
          PATH_SEGMENT
            NAME_REF
              IDENT "i32"
      COMMA ","
      R_PAREN ")"
    SEMICOLON ";"
  WHITESPACE "\n"
