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From: David Bremner <david@tethera.net>
To: "yury.t" <tptlab@tuta.io>, notmuch@notmuchmail.org
Subject: Re: regex [X-Z] with non-ascii char returns different results from
 (X|Y|Z)
In-Reply-To: <LmoFLlW--3-1@tuta.io>
References: <LmoFLlW--3-1@tuta.io>
Date: Wed, 21 Aug 2019 11:38:07 -0300
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"yury.t" <tptlab@tuta.io> writes:

> Some regular expression returns incorrect results if the pattern
> contains multibyte characters in square brackets.  The following
> bracket expression matches subjects not starting with `[=EF=BC=91-=EF=BC=
=99]` and
> returns more results than the parenthesis expression.

We rely on POSIX.2 regex functions (regcomp, regexec). I would be
interested to know if the searches you are interested in work in a
standalone C program using regcomp and regexec.

d