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Re: Elisps rplacd vs CL's one
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From: |
Stefan Monnier |
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Subject: |
Re: Elisps rplacd vs CL's one |
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Date: |
Sat, 29 Aug 2015 18:05:04 -0400 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) |
> Emacs Lisp's rplacd and Common Lisp's RPLACD are called the same, but
> behave differently (ELisp's one returns the NEWCDR and CL's one returns
> the modified cons). What is the reason for that? Is it an accident?
> While I do understand that EL ≠ CL, having a function called the same in
> both, doing roughly the same thing, but not quite, seems a bit
> misleading, and I was just curious whether there was a deep reason for
> that.
FWIW, I consider the use of rplacd's return value to be a very bad idea.
Stefan