Re: Bizarre behavior of \w in a regular expression bracket construct

Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> writes:
> On 2021-Feb-23, Tom Lane wrote:
>> * Create infrastructure to allow treating \w as a character class
>> in its own right. (I did not expose [[:word:]] as a class name,
>> though it would be a little more symmetric to do so; should we?)

> Apparently [:word:] is a GNU extension (or at least a "bash-specific
> character class"[1] but apparently Emacs also supports it?); all the
> others are mandated by POSIX[2].
> I think it'd be fine to expose [:word:] ...

Yeah, I'd independently come to the same conclusion. This GNU precedent
offers even more basis for that, though.

regards, tom lane