Re: behavior of '-'

Hi, KANEMATSU Daiji <kanematu(a)sra.co.jp&gt; reported in xemacs-beta-ja that there is a bug in the byte-compiled math function under XEmacs 21.2 as follows: I found the cause of this in the function `byte-optimize-minus'. Here is a patch for it. 2001-03-21 Katsumi Yamaoka <yamaoka(a)jpl.org&gt; * byte-optimize.el (byte-optimize-minus): Fix. --- byte-optimize.el~ Mon Jan 15 22:05:01 2001 +++ byte-optimize.el Wed Mar 21 09:09:02 2001 ＠＠ -729,8 +729,12 ＠＠ (decf (nth 1 form) last) (butlast form)) + ;; (- 0 x) --> (- x) + ((and (eq 0 (nth 1 form)) (= (length form) 3)) + `(- ,(nth 2 form))) + ;; (- 0 x ...) --> (- (- x) ...) - ((and (eq 0 (nth 1 form)) (>= (length form) 3)) + ((and (eq 0 (nth 1 form)) (> (length form) 3)) `(- (- ,(nth 2 form)) ,＠(nthcdr 3 form))) (t (byte-optimize-predicate form))))) -- Katsumi Yamaoka <yamaoka(a)jpl.org&gt;