Re: master ce63f91025: Add textsec functions for verifying email addresses

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> Because strings aren't used in isolation.  In this case we're checking
>> the name part of an email address headers, and:
>> 
>> (insert "Lars Ingebrigtsen\N{RIGHT-TO-LEFT OVERRIDE}" "larsi@gnus.org")
>> 
>> Boom.
>
> Then you must pass the entire concatenated string to the function.  Or
> call it on buffer text after inserting the string there.  This
> function must see the characters affected by the bidi controls, to
> tell whether the control do any harm.

I see.  Perhaps we should have another function in addition -- one that
says "does this string (if inserted into a buffer) possibly affect other
text"?  I.e., "does it have dangling directional modifiers"?  I think
that's really what we want here (and why the Unicode recommendations are
like they are in this area).

If we had such a function, then textsec-name-suspicious-p use both the
current bidi-find-overridden-directionality and the new predicate as a
filter.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no