SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "main"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          RANGE_EXPR
            CAST_EXPR
              LITERAL
                INT_NUMBER "0"
              WHITESPACE " "
              AS_KW "as"
              WHITESPACE " "
              PATH_TYPE
                PATH
                  PATH_SEGMENT
                    NAME_REF
                      IDENT "usize"
            WHITESPACE " "
            DOT2 ".."
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          RANGE_EXPR
            BIN_EXPR
              LITERAL
                INT_NUMBER "1"
              WHITESPACE " "
              PLUS "+"
              WHITESPACE " "
              CAST_EXPR
                LITERAL
                  INT_NUMBER "2"
                WHITESPACE " "
                AS_KW "as"
                WHITESPACE " "
                PATH_TYPE
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "usize"
            WHITESPACE " "
            DOT2 ".."
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"