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Re: How to avoid compiler warning `unused lexical variable' for `dolist'
From: |
Emanuel Berg |
Subject: |
Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'? |
Date: |
Fri, 08 Jan 2021 13:38:24 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
tomas wrote:
> I think Stefan explained that pretty well in this thread:
> dotimes is implemented as a macro (the alternative would be
> to special-case it) which introduces a let-binding
But surely this happens elsewhere as well?
> to the counting index... which is used in the result part,
> unless it's not used, which then causes the byte compiler to
> issue the warning.
But the warning isn't specifically introduced for this
situation, is it? Because then it could just say that, instead
of the confusing wasn't used thing.
But if it isn't, then why is it triggered by this at all and
how can it be so specific to even act upon a certain part of
the construct?
> Fixing that would take
>
> (a) special-casing dotimes somehow. For maintaniability
> reasons probably out of the question
No.
> (b) making the macro expander for dotimes smarter, to
> skip introducing the let-binding.
No.
> (c) (that seems Stefan's favourite, and I tend to trust him
> blindly in those things) discourage the three argument
> use of dotimes, since it's not that idiomatic in Elisp
> anyway (those idioms are more Common Lisp-y).
Ha :) Well, whatever.
> Makes more sense now?
No! Again, this is a problem with the byte compiler.
So rather, fixing it would take
(d) fixing the byte compiler
--
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http://user.it.uu.se/~embe8573
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- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, (continued)
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Stefan Monnier, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Tomas Hlavaty, 2021/01/09
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Stefan Monnier, 2021/01/09
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Tomas Hlavaty, 2021/01/10
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Stefan Monnier, 2021/01/10
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Tomas Hlavaty, 2021/01/11
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Jean Louis, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Stefan Monnier, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Emanuel Berg, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, tomas, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?,
Emanuel Berg <=
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, tomas, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Philipp Stephani, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Emanuel Berg, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Emanuel Berg, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Philipp Stephani, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Emanuel Berg, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, tomas, 2021/01/08
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Jean Louis, 2021/01/09
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Leo Butler, 2021/01/09
- Re: How to avoid compiler warning `unused lexical variable' for `dolist' or `dotimes'?, Philipp Stephani, 2021/01/09