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From: Rich <rich@example.invalid>
Newsgroups: comp.lang.tcl
Subject: Re: Why do we need "eval"? (Expect question)
Date: Fri, 13 Sep 2024 04:32:55 -0000 (UTC)
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Kenny McCormack <gazelle@shell.xmission.com> wrote:
> ISTM that this {*} thing is a relatively recent addition to the langauge,

Not really, it was added in 8.5, which was released Feb 12, 2016 [1].  
Although 2016 *is* relatively recent in regards to many expect scripts.

> since Expect has been around for a long time, and most of the scripts that
> do this sort of thing were written long ago.

Before 8.5, 'eval' was the way to perform the "splicing" that {*} 
provides.


[1] https://www.tcl.tk/software/tcltk/8.5.tml