LET*の星はRMSが考えた? — #:g1

Posted 2011-07-09 10:51:00 GMT

古いLispMのメーリングリスト(info-lispm@mit-ai)を眺めていて発見した、新機能の告知メッセージ

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

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.

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。
おおー、RMSかー、などと思ってしまいました。こんなことに関心がある人も少ないかと思いますが。

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