bug#20566: perl-mode: maybe have the parentheses of s{a}{b} also blink

bug#20566: perl-mode: maybe have the parentheses of s{a}{b} also blink

[積丹尼 Dan Jacobson]

Just like the matching parentheses if(1){$k++;} blink,
also maybe do the same for s{a}{b} etc.

bug#20566: perl-mode: maybe have the parentheses of s{a}{b} also blink

[Stefan Kangas]

積丹尼 Dan Jacobson <jidanni@jidanni.org> writes:

> Just like the matching parentheses if(1){$k++;} blink,
> also maybe do the same for s{a}{b} etc.

Trying this on the most recent version of Emacs, 26.2:

0. emacs -Q
1. C-x b foo <RET>
2. M-x perl-mode <RET>
3. s{a}{b}

I do get a blinking effect, i.e. that when I type the "}" after "a"
and "b", Emacs briefly highlights the "{" character.

If this is indeed the issue, could you please test this on the most
recent version of Emacs (26.2) and see if you can reproduce it?

Also, could you clarify what "s{a}{b} etc." means above -- are there
any other expressions which you think should exhibit this behaviour
but do not?

If I don't get a response in a couple of weeks, I will close this as
unreproducible.

Thanks,
Stefan Kangas

bug#20566: perl-mode: maybe have the parentheses of s{a}{b} also blink

[積丹尼 Dan Jacobson]

I think I am saying that when one types in
if(1),
even here in a non-perl mode as I type this email message,
emacs makes the ( and ) very bright, indeed as long as I don't move the
cursor more.

So I'm saying that something just the same should be done
on s/a/b/ s{a}{b}
where all three /'s or all four brackets light up.

>>>>> "SK" == Stefan Kangas <stefan@marxist.se> writes:

SK> I do get a blinking effect, i.e. that when I type the "}" after "a"
SK> and "b", Emacs briefly highlights the "{" character.

Well not only briefly, but it should stay lit, until the cursor moves
away, All four of {}{} too.

Same for [][], !!!, etc.

bug#20566: perl-mode: maybe have the parentheses of s{a}{b} also blink

[Lars Ingebrigtsen]

積丹尼 Dan Jacobson <jidanni@jidanni.org> writes:

> I think I am saying that when one types in
> if(1),
> even here in a non-perl mode as I type this email message,
> emacs makes the ( and ) very bright, indeed as long as I don't move the
> cursor more.
>
> So I'm saying that something just the same should be done
> on s/a/b/ s{a}{b}
> where all three /'s or all four brackets light up.

I don't think that sounds very useful -- the blinking stuff is supposed
to match the matching brace, not wider language constructs.  So I'm
closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no