Re: :alnum: broken?

[Paul Eggert]

On 2/21/20 11:48 PM, Eli Zaretskii wrote:
> "[:space:]" is a valid, though peculiar, character class

Yes, but point of my suggestion was to suggest that we change Emacs to make it 
not a valid character class. In practice it would be a win to change Emacs in 
this way, since the aggravation of the current approach (which regularly bites 
people as this thread illustrates) far outweighs the aggravation of making 
classes like "[:space:]" invalid when they're intended (which they're invariably 
not).

A similar change went into GNU grep a decade ago, and in practice it's been a 
win. It would also be a win with Emacs.