SOURCE_FILE
  TYPE_ALIAS
    TYPE_KW "type"
    WHITESPACE " "
    NAME
      IDENT "M"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    PTR_TYPE
      STAR "*"
      MUT_KW "mut"
      WHITESPACE " "
      TUPLE_TYPE
        L_PAREN "("
        R_PAREN ")"
    SEMICOLON ";"
  WHITESPACE "\n"
  TYPE_ALIAS
    TYPE_KW "type"
    WHITESPACE " "
    NAME
      IDENT "C"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    PTR_TYPE
      STAR "*"
      MUT_KW "mut"
      WHITESPACE " "
      TUPLE_TYPE
        L_PAREN "("
        R_PAREN ")"
    SEMICOLON ";"
  WHITESPACE "\n"
