* bug#60895: Make lambda warning easier to understand
@ 2023-01-17 22:50 Dan Jacobson
2023-01-17 23:25 ` Drew Adams
0 siblings, 1 reply; 2+ messages in thread
From: Dan Jacobson @ 2023-01-17 22:50 UTC (permalink / raw)
To: 60895
After saying
Warning: (lambda nil \.\.\.) quoted with ' rather than with #'
please also say
Just change '(lambda into #'(lambda
That way people will understand it.
https://emacs.stackexchange.com/questions/74318/warning-quoted-with-rather-than-with
^ permalink raw reply [flat|nested] 2+ messages in thread
* bug#60895: Make lambda warning easier to understand
2023-01-17 22:50 bug#60895: Make lambda warning easier to understand Dan Jacobson
@ 2023-01-17 23:25 ` Drew Adams
0 siblings, 0 replies; 2+ messages in thread
From: Drew Adams @ 2023-01-17 23:25 UTC (permalink / raw)
To: Dan Jacobson, 60895@debbugs.gnu.org
> After saying
> Warning: (lambda nil \.\.\.) quoted with ' rather than with #'
>
> please also say
> Just change '(lambda into #'(lambda
>
> That way people will understand it.
> https://urldefense.com/v3/__https://emacs.stackexchange.com/questions/743
> 18/warning-quoted-with-rather-than-
> with__;!!ACWV5N9M2RV99hQ!IsLX9TB5zcLT0PwRzmL0cCiiGzx62LVQbGMPk3EiStP6kJvG
> Um6D1reVbucpBxlw8r6g-KjbeT19F7SFjA$
Users should be told, so they understand:
1. Not to quote lambdas. Tell them that the result
is a _list_, which only in some cases will be
interpreted as a function. (And mention that the
byte compiler often can't know the intended use
is as a function, if it's quoted.)
2. lambdas don't need to be quoted - they're
self-evaluating in Elisp - like t and nil.
3. Using #' makes the intention/use clear for all,
including the byte-compiler.
A byte-compiler warning is appropriate. Preferably
it would also point you to doc explaining this in
more detail in the Elisp manual.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-01-17 22:50 bug#60895: Make lambda warning easier to understand Dan Jacobson
2023-01-17 23:25 ` Drew Adams
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