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Re^3: Named capture backreferences cannot be used in character classes?

by kcott (Canon)
on Sep 27, 2013 at 13:09 UTC ( #1055975=note: print w/replies, xml ) Need Help??


in reply to Re^2: Named capture backreferences cannot be used in character classes?
in thread Named capture backreferences cannot be used in character classes?

"... I don't have a problem with it being "experimental"; as far as I have observed it hasn't changed in all the years it has been there ..."

When I read that this afternoon, that was my understanding too. However, poking aroung in perl5180delta some hours later (on a completely unrelated matter), I found: "/(?{})/ and /(??{})/ have been heavily reworked".

That's really just an FYI, if you're interested. It's still marked "experimental" and I saw nothing to indicate any specific performance enhancements.

-- Ken

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Re^4: Named capture backreferences cannot be used in character classes?
by BrowserUk (Pope) on Sep 27, 2013 at 13:43 UTC
    That's really just an FYI,

    Thanks for the heads up. I haven't moved onto 5.18 yet, but I will be doing so soon.

    Thankfully, my primary use of the feature is where I have regex elements that are codependent. EG.

    A => qr[...${B()}...], B => qr[...${C()}...], C => qr[...${A()}...],

    Which doesn't work because there is no way to order them such that all dependancies can be resolved at compile-time.

    Instead I have to use:

    A => qr[...(??{B()})...], B => qr[...(??{C()})...], C => qr[...(??{A()})...],

    Which doesn't seem to be affected by the changes.


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    "Science is about questioning the status quo. Questioning authority".
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[choroba]: Unfortunately, none of it is online
[haukex]: I figured that POD tests make sense, but only as author tests
[choroba]: I mean, the slides are, but not the makefile with scripts to create them
[Corion]: haukex: I've only now arrived at that revelation ;)
[Corion]: choroba: I use spod5, which also has that support, and also implements its own kinda-make stuff
[haukex]: But that module I just linked to assumes that most verbatim blocks are runnable code, I have other modules where that's not the case, so there I just copy-and-paste the synopsis into the author tests...
[haukex]: not the most efficient, but then again, I don't have that many modules on CPAN :-)
[Corion]: haukex: Yes, but if it's only supposed to run on my machine, I can be far more liberal with how I extract the code etc.
[Corion]: haukex: Yes - I see the benefit of using Dist::Zilla for people with 150+ modules on CPAN, but I don't see it for myself, and I'm always put off from contributing to such modules because they require a lot of toolchain setup that I don't want to ...
[Corion]: ... spend time on if I only want to provide a short patch

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