From: "Roland Winkler" <winkler@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: let-bind a varlist only known at run time
Date: Sun, 4 Jun 2017 15:43:37 -0500 [thread overview]
Message-ID: <28921.59572.342625.22836@gargle.gargle.HOWL> (raw)
Normally the varlist for the special let form is hardcoded. Is it
possible to specify the varlist only at runtime?
The usage scenario I have in mind is that a user variable foo-alist
may hold an alist that becomes the varlist for the let-binding. So
it's not known at compile time which bindings a user might want to
specify in foo-alist. Also, it might be hard to predict an
exhaustive list of "candidate variables" a user might want to put into
foo-alist (and certainly such a list would be hard to maintain).
On the other hand, I expect that efficiency is not an issue for the
body appearing in let. So if there is nothing else I could
construct the complete let-form at runtime and pass it on to `eval'.
But maybe there is a better solution...
Thanks!
Roland
next reply other threads:[~2017-06-04 20:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-04 20:43 Roland Winkler [this message]
2017-06-05 2:49 ` let-bind a varlist only known at run time Michael Heerdegen
2017-06-05 3:08 ` Roland Winkler
2017-07-12 21:59 ` Michael Heerdegen
2017-07-12 23:09 ` Roland Winkler
2017-06-05 13:44 ` Philipp Stephani
2017-06-05 15:07 ` Roland Winkler
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