Re: Difference between \\w and [:word:]?

[Eric Abrahamsen]

Robert Pluim <rpluim@gmail.com> writes:

> Eric Abrahamsen <eric@ericabrahamsen.net> writes:
>
>> Can someone explain to me what's happening here? What's the difference
>> between \\w and [:word:], inside and outside of a bracket construction?
>>
>> (setq case-fold-search nil)
>> (string-match-p "[:word:]" "P") => nil
>> (string-match-p "[[:word:]]" "P") => 0
>> (string-match-p "\\w" "P") => 0
>> (string-match-p "[\\w]" "P") = nil
>
> Consider
>
> (string-match-p "[\\w]" "w") => ?

Oh, ha.

(string-match-p "[\\w]" "\\") => 0

And my other confusion (about character classes) was cleared up by
reading the manual more carefully.

Thanks,
Eric