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From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <160602151123.ZM21157@torch.brasslantern.com>
Date: Thu, 2 Jun 2016 15:11:23 -0700
In-Reply-To: <CAKc7PVDXOUzJfhQMtCuW8mknM+OzyXQzafj9BKWPHDzkxAwXLA@mail.gmail.com>
Comments: In reply to Sebastian Gniazdowski <sgniazdowski@gmail.com>
        "MBEGIN, MEND in #m when pattern has "|"" (Jun  2,  7:41pm)
References: <CAKc7PVDXOUzJfhQMtCuW8mknM+OzyXQzafj9BKWPHDzkxAwXLA@mail.gmail.com>
To: Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: MBEGIN, MEND in #m when pattern has "|"
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On Jun 2,  7:41pm, Sebastian Gniazdowski wrote:
}
} below is a code that uses indexes set by (#m) or (#b). Turns out the
} indexes are set only when using (#b). For (#m) they are set when there
} is no "|" in the pattern. Why?

MATCH MBEGIN and MEND are set only if there is a single possible match
(more precisely, when the string can be matched with only a combination
of strcmp() and simple wildcards).  In //pat/repl/, there are multiple
possible match positions; which begin and end do you want?

This probably should have been documented better.