Issue #4443 has been updated by ko1 (Koichi Sasada). Assignee changed from matz (Yukihiro Matsumoto) to ko1 (Koichi Sasada) ---------------------------------------- Bug #4443: odd evaluation order in a multiple assignment https://bugs.ruby-lang.org/issues/4443#change-28032 Author: mame (Yusuke Endoh) Status: Assigned Priority: Normal Assignee: ko1 (Koichi Sasada) Category: Target version: ruby -v: - =begin ?????¤ã?§ã?????core ??«æ???????¦ã????¾ã?£ã??????????ªã?®ã?§ç?»é?²ã????´ã????? Ruby ??¯å·¦????????«è??価ã????²ã????¨ä¿¡?????¦ã???????®ã?§ã????????å¤????代å?¥ã?§è????????????¾ã???????? def foo p :foo [] end def bar p :bar end x, foo[0] = bar, 0 bar ?????? foo ???å·¦ã?«ã???????®ã?§ã??:foo ???:bar ??®é????«å?ºå????????????????¨ã?????å¾?????????®ã?§ã??????????ªã????? :bar ???:foo ??«ã?ªã????¾ã????? ??·ä???????«ä???????°ã???????¨ã???????¨ã??ä¾??????? obj, obj.foo = obj.foo, obj ??«ã?? swap ??????å¾??????????????§ã????????????????ªã????¾ã??????????????????????³ã?¼ã????¯å???????«ã????¨ã?®å??転ã?ªã?©ã??å®?è£?????????¨ã????«ã????°ã????°æ?¸ã?????????ªã????¾ã??????????®æ???????«æ???????¤ã???????®ã?? splay tree ???å®?è£??????¦ã???????¨ã????§ã????????????????ªã??: t.left, t.left.right, t = t.left.right, t, t.left 1.9 ç³»å????§ä¿®æ£ã????¹ã????¨ã?¾ã?§ã?¯æ???????¾ã???????????2.0 ??§ç?´ã????½æ?§ã?¯ã???????§ã?????????????? IRC ??§è©±????????????????????§æ?®é???????¿ã???????ªå??å¿????????????¾ã??????????? foo[0] = bar ??¯ã?¡ã???????? :foo ???:bar ??®é????«å?ºã?¾ã????? -- Yusuke Endoh <mame / tsg.ne.jp> =end -- http://bugs.ruby-lang.org/