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bug#40972: 27.0.91; assoc TESTFN's args reversed?
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From: |
Michael Heerdegen |
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Subject: |
bug#40972: 27.0.91; assoc TESTFN's args reversed? |
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Date: |
Thu, 30 Apr 2020 01:30:13 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Shigeru Fukaya <shigeru.fukaya@gmail.com> writes:
> It seems to me, for third argument of `assoc', arguments are passed in a
> reverse order.
>
> (assoc "assoc" '(("cl-assoc" A) ("cl-member" B))
> (lambda (x y) (equal (concat "cl-" x) y)))
> ==> nil
>
> (assoc "assoc" '(("cl-assoc" A) ("cl-member" B))
> (lambda (y x) (equal (concat "cl-" x) y)))
> ==> ("cl-assoc" A)
>
> Or, is this intended behavior??
Dunno what others expect, but note that your predicate is not an
equality predicate (it's not symmetric), and the docstring doesn't
specify a behavior for this case.
Michael.