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Re: [Emacs-diffs] master c13a4df: Remove the calls to `seq-into` from `s


From: Nicolas Petton
Subject: Re: [Emacs-diffs] master c13a4df: Remove the calls to `seq-into` from `seq-concatenate`
Date: Tue, 25 Aug 2015 10:32:46 +0200
User-agent: Notmuch/0.19 (http://notmuchmail.org) Emacs/25.0.50.2 (x86_64-unknown-linux-gnu)

Stefan Monnier <address@hidden> writes:

>>> I don't understand this change.  Can't it cause two CL-structs to be
>>> vconcat'd together, which wouldn't make much sense?
>> The previous version of `seq-concatenate' did not prevent that, since
>> CL-structs are vectors, thus sequences, and the function was using
>> `sequencep' to determine if the seq had to be converted or not.
>
> Indeed, but if we intend to work for new "sequence" types defined via
> CL-struct, that's still a problem.

Yes, it is still a problem.  One solution would be to test if the seq is
a cl-struct with, in which case we could use `seq-into'.  But then that
would only fix the cl-struct case, not any other.

Nico

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