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Postings from July 2022
On Sat, 9 Jul 2022 06:14:36 +0900
Yuki Kimoto <kimoto.yuki@gmail.com> wrote:
> I'm interested in this topic.
>
> I have questions.
>
> 1. Can this be resolved in tokenizer?
>
> This means ${^INPUT_LINE_NUMBER} is replaced with $. in toke.c.
No. That's really the variable's name, as can be demonstrated via
softrefs:
$ perl -E '"hello" =~ m/\w+/p; say ${^MATCH}; my $varname = "\cMATCH";
say $$varname'
hello
hello
> 2. Is the brace required?
>
> Is $^INPUT_LINE_NUMBER allowed?
Yes. $^ is already a variable on its own (a little-known part related
to formats).
> 3. Can only the aliases that are often used be added?
>
> For example, in my experience. I use $., $/, $$, $@, $!, $<, $> etc.
>
> If 1 and 3 are ok, I can write RFC.
I'm not sure what significance part 1 has on writing the RFC. That
feels like a purely implementation-level question.
--
Paul "LeoNerd" Evans
leonerd@leonerd.org.uk | https://metacpan.org/author/PEVANS
http://www.leonerd.org.uk/ | https://www.tindie.com/stores/leonerd/
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