SOURCE_FILE
  TYPE_ALIAS
    TYPE_KW "type"
    WHITESPACE " "
    NAME
      IDENT "T"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    SLICE_TYPE
      L_BRACK "["
      TUPLE_TYPE
        L_PAREN "("
        R_PAREN ")"
      R_BRACK "]"
    SEMICOLON ";"
  WHITESPACE "\n"
