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| From: | Julian Foad |
| Subject: | Re: lowercase letters for binaries |
| Date: | Mon, 07 Nov 2005 01:53:17 +0000 |
| User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/20050511 |
Charles Levert wrote: [...]
Hence, my question was: is that the justification used by the POSIX committee when they standardized on this behavior for EREs?
No. See the Open Group's rationale: http://www.opengroup.org/onlinepubs/009695399/xrat/xbd_chap09.html#tag_01_09_04"It was suggested that, in addition to interval expressions, back-references ( '\n' ) should also be added to EREs. This was rejected by the standard developers as likely to decrease consensus."
Presumably the lack of historical support for back-refs in ERE made it too controversial.
- Julian
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