Re: Word boundary anchors \< and \> not parsed correctly on the right side of =~

From	Paulo Marcel Coelho Aragão <marcelpaulo@gmail.com>
Newsgroups	gnu.bash.bug
Subject	Re: Word boundary anchors \< and \> not parsed correctly on the right side of =~
Date	2018-07-10 12:07 -0300
Message-ID	<mailman.3380.1531235244.1292.bug-bash@gnu.org> (permalink)
References	<5b440fe8.1c69fb81.948f6.4d1e@mx.google.com> <20180710122718.wrrzjuqpmpns4o4o@eeg.ccf.org> <20180710130234.r5mwjc62adids7m5@monk> <69409432-a74c-a489-4d66-64a9f61cb9bf@case.edu>

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On Tue, Jul 10, 2018 at 10:50:05AM -0400, Chet Ramey wrote:
>> […] However, this indicates to me that bash recognizes \< \> as word
>> anchors:
 
> No, it doesn't. It indicates that the system's POSIX regular expression
> implementation has extensions.

>> 3. bash evaluates them correctly when used with parameter expansion

> No. It passes them to the system's POSIX regexp library function, which
> understands them as an extension.

A subtle point, which makes sense. It really brings home what the reference
manual means by "as in regex3". Thanks for shedding light on this !

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Re: Word boundary anchors \< and \> not parsed correctly on the right side of =~ Paulo Marcel Coelho Aragão <marcelpaulo@gmail.com> - 2018-07-10 12:07 -0300

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