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Postings from October 2015
On Tue, Oct 13, 2015 at 11:13:25AM -0400, Eric Brine wrote:
> On Mon, Oct 12, 2015 at 6:17 AM, Dave Mitchell <davem@iabyn.com> wrote:
>
> > On Wed, Oct 07, 2015 at 07:07:53PM +0200, Lukas Mai wrote:
> > > This would mean 'when (qr/.../)' becomes 'when { $_ eq qr/.../ }'.
> >
> > Good point. So a literal qr// will have to be accepted as well as a
> > literal //, perhaps along with a warning that "given(qr/.../) better
> > written as given(/.../)" ?
> >
>
> Why?
Because its inefficient. It has to clone a new regex each time. Its like
doing sub {...}->(...) rather than f(...).
> "split(qr{...}, ...)" doesn't warn, and I use that whenever I want a
> delimiter other than "/".
Why not use m{....} ?
> Even "$_ =~ qr{...}" doesn't warn.
Yes, it's too late to change that. But if I had a time machine, I would
have added such a warning when qr// was introduced. But since this is new
(kinda), we have the opportunity to add a new warning without backcompat
issues.
--
My Dad used to say 'always fight fire with fire', which is probably why
he got thrown out of the fire brigade.
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