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Re: How to specialize seq-concatenate and seq-into-sequence?
From: |
Philipp Stephani |
Subject: |
Re: How to specialize seq-concatenate and seq-into-sequence? |
Date: |
Fri, 4 Mar 2022 21:56:12 +0100 |
> Am 04.03.2022 um 03:35 schrieb Michael Heerdegen <michael_heerdegen@web.de>:
>
> Philipp Stephani <p.stephani2@gmail.com> writes:
>
>>> Define `it`.
>>> The dispatch is expected to be on the `type` argument (using an
>>> `eql` specializer).
>>>
>>
>> Doesn't that contradict the docstring?
>
> I'm also a bit confused. How would you concatenate a list and a stream
> to a list? Or how would you implement it?
I guess the idea is that `seq-concatenate' can only be specialized for new
*result* types, not for new *argument* types. That is, if you have a new
sequence-like type `my-sequence', you can specialize it like so:
(cl-defmethod ((_type (eql my-sequence)) &rest sequences)
(my-sequence-concatenate (mapcar #'convert-to-my-sequence sequences)))
where `my-sequence-concatenate' and `convert-to-my-sequence' are functions
specific to the new sequence type. It's not possible to convert a
`my-sequence' to a list this way; for that you'd need to specialize `seq-into'
or `seq-into-sequence' instead.
- How to specialize seq-concatenate and seq-into-sequence?, Philipp Stephani, 2022/03/03
- Re: How to specialize seq-concatenate and seq-into-sequence?, Stefan Monnier, 2022/03/03
- Re: How to specialize seq-concatenate and seq-into-sequence?, Philipp Stephani, 2022/03/03
- Re: How to specialize seq-concatenate and seq-into-sequence?, Stefan Monnier, 2022/03/03
- Re: How to specialize seq-concatenate and seq-into-sequence?, Philipp Stephani, 2022/03/03
- Re: How to specialize seq-concatenate and seq-into-sequence?, Michael Heerdegen, 2022/03/03
- Re: How to specialize seq-concatenate and seq-into-sequence?, Stefan Monnier, 2022/03/04
- Re: How to specialize seq-concatenate and seq-into-sequence?, Michael Heerdegen, 2022/03/04
- Re: How to specialize seq-concatenate and seq-into-sequence?, Stefan Monnier, 2022/03/04
- Re: How to specialize seq-concatenate and seq-into-sequence?,
Philipp Stephani <=
- Re: How to specialize seq-concatenate and seq-into-sequence?, Michael Heerdegen, 2022/03/04
- Re: How to specialize seq-concatenate and seq-into-sequence?, Stefan Monnier, 2022/03/04