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From: John Mastro <john.b.mastro@gmail.com>
To: "help-gnu-emacs@gnu.org" <help-gnu-emacs@gnu.org>
Cc: Plamen Tanovski <pgt@arcor.de>
Subject: Re: seq-mapn and circular lists
Date: Wed, 14 Dec 2016 15:32:44 -0800	[thread overview]
Message-ID: <CAOj2CQS=dLimPL30wFH0vM9NnSGs+JgE+HpF+nhFX5SwEE8f_g@mail.gmail.com> (raw)
In-Reply-To: <o2sghh$1snc$1@gioia.aioe.org>

Plamen Tanovski <pgt@arcor.de> wrote:
> Hi,
>
> while cl-map works fine on circular lists, seq-mapn just freezes
>
> (let ((l1 '#1=(1 . #1#)))
>   ; (map 'list #'+ '(3 4 5 7) l1)
>   (seq-mapn #'+ '(3 4 5 7) l1))
>
> Making the circular list with setcdr or nconc doesn't help. Any
> suggestions?

Indeed, seq-map and seq-mapn do not attempt to identify or handle circular
lists. My advice would be to avoid circular lists, or stick to `cl-map' if you
must accommodate them :)

Since seq.el is developed as part of Emacs, you can use `M-x report-emacs-bug'
to submit a feature request.

        John



  reply	other threads:[~2016-12-14 23:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-14 22:19 seq-mapn and circular lists Plamen Tanovski
2016-12-14 23:32 ` John Mastro [this message]
2016-12-14 23:57   ` Michael Heerdegen
2016-12-15  9:26     ` Nicolas Petton
2016-12-15  9:33       ` Nicolas Petton

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