Posted 2011-07-09 10:51:00 GMT
Date: 15 JUN 1980 0023-EDT From: RMS at MIT-AI (Richard M. Stallman) Subject: Incompatible change to PROG To: INFO-LISPM at MIT-AIこれだけでは、PROGの変数が直列に束縛されるものをPROG*にしたのがRMSかどうかははっきりしませんが、LET*はRMSの創案かもしれないですね。
Soon PROG will bind all the variables in parallel instead of sequentially. This only makes a difference if you have initializations which depend on other variables bound by the same PROG.
If you want to bind variables sequentially, use PROG*, which is presently the same as PROG and will not change.
Old QFASL files will continue to work as before. The change takes effect only when the program is recompiled.
I plan to create LET* and DO*, which will both do sequential binding like PROG*, at some time in the future.