Re: Patterns: Why are anchors not character classes?

["Soni L." <fakedme@...>]

On 16/07/15 05:44 PM, Jonathan Goble wrote:
> On Thu, Jul 16, 2015 at 4:36 PM, Rena <hyperhacker@gmail.com> wrote:
> > On Jul 16, 2015 6:04 AM, "John Hind" <john.hind@zen.co.uk> wrote:
> >
> > > New character classes are unlikely to break existing code.
> > Except code that builds patterns from user input and escapes it like gsub(s,
> > "%W", "%%1").
> Solution: forget %^ and %$ completely and use %b (beginning) and %e
> (end) instead. Neither of those letters are currently in use for
> character classes, so nothing would break, and the letters would be
> easy to remember.
%b is already in use, actually, but for %b() or %b[] or %b`'

See "Pattern Item": http://www.lua.org/manual/5.3/manual.html#6.4.1
> Plus, by using letters, the standard trick of capitalizing the letter
> can be used to say "anything but the beginning/end of the string". Not
> sure how useful that would be, but it would be available if someone
> wanted it.

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