SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "foo"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          RANGE_EXPR
            DOT2 ".."
            BIN_EXPR
              LITERAL
                INT_NUMBER "1"
              WHITESPACE " "
              PLUS "+"
              WHITESPACE " "
              LITERAL
                INT_NUMBER "1"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          BIN_EXPR
            RANGE_EXPR
              DOT2 ".."
              PATH_EXPR
                PATH
                  PATH_SEGMENT
                    NAME_REF
                      IDENT "z"
            WHITESPACE " "
            EQ "="
            WHITESPACE " "
            LITERAL
              INT_NUMBER "2"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          BIN_EXPR
            PATH_EXPR
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "x"
            WHITESPACE " "
            EQ "="
            WHITESPACE " "
            RANGE_EXPR
              LITERAL
                FALSE_KW "false"
              DOT2 ".."
              BIN_EXPR
                LITERAL
                  INT_NUMBER "1"
                WHITESPACE " "
                EQ2 "=="
                WHITESPACE " "
                LITERAL
                  INT_NUMBER "1"
          SEMICOLON ";"
        WHITESPACE "\n    "
        LET_STMT
          LET_KW "let"
          WHITESPACE " "
          IDENT_PAT
            NAME
              IDENT "x"
          WHITESPACE " "
          EQ "="
          WHITESPACE " "
          RANGE_EXPR
            LITERAL
              INT_NUMBER "1"
            DOT2 ".."
          SEMICOLON ";"
        WHITESPACE "\n    \n    "
        EXPR_STMT
          RANGE_EXPR
            DOT2EQ "..="
            BIN_EXPR
              LITERAL
                INT_NUMBER "1"
              WHITESPACE " "
              PLUS "+"
              WHITESPACE " "
              LITERAL
                INT_NUMBER "1"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          BIN_EXPR
            RANGE_EXPR
              DOT2EQ "..="
              PATH_EXPR
                PATH
                  PATH_SEGMENT
                    NAME_REF
                      IDENT "z"
            WHITESPACE " "
            EQ "="
            WHITESPACE " "
            LITERAL
              INT_NUMBER "2"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          BIN_EXPR
            PATH_EXPR
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "x"
            WHITESPACE " "
            EQ "="
            WHITESPACE " "
            RANGE_EXPR
              LITERAL
                FALSE_KW "false"
              DOT2EQ "..="
              BIN_EXPR
                LITERAL
                  INT_NUMBER "1"
                WHITESPACE " "
                EQ2 "=="
                WHITESPACE " "
                LITERAL
                  INT_NUMBER "1"
          SEMICOLON ";"
        WHITESPACE "\n    "
        LET_STMT
          LET_KW "let"
          WHITESPACE " "
          IDENT_PAT
            NAME
              IDENT "x"
          WHITESPACE " "
          EQ "="
          WHITESPACE " "
          RANGE_EXPR
            LITERAL
              INT_NUMBER "1"
            DOT2 ".."
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"