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Re: [netmod] Potential additions to rfc6087bis: RegEx guidelines

Carsten Bormann <cabo@tzi.org> Mon, 04 September 2017 11:18 UTC

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From: Carsten Bormann <cabo@tzi.org>
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Date: Mon, 04 Sep 2017 13:18:08 +0200
Cc: Alex Campbell <Alex.Campbell@Aviatnet.com>, "netmod@ietf.org" <netmod@ietf.org>
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References: <c8de6140-af50-0a4b-a479-b011a8dfbbe7@cisco.com> <CABCOCHRNt3Tkxy8Ffz3JGgPe-rQYwZ3MTLmD43OQi4P6tZQJmg@mail.gmail.com> <f7151a6b-9deb-52ad-62a9-78b29a552540@cisco.com> <20170830102902.2n5q6rgq2x2dxfq2@elstar.local> <e8482a9c-cba3-28e2-9ffa-ec5eb5c1c0a4@cisco.com> <20170830123156.cssrg5kklpo67fie@elstar.local> <CABCOCHTtN611FO2ov2kTLtZx-Q3=tzgH7Xk9uGvFUD1WuyMZyw@mail.gmail.com> <b13c5e9a-e9f9-96e9-8823-0402fb74af09@cisco.com> <1504223854014.55228@Aviatnet.com> <847e5bf9-7b3d-9ff8-9954-970f32a2094c@cisco.com> <20170902073342.xoziwor4tdr5bipw@elstar.local> <e92d63dc-012c-c37f-e94e-8013def8c736@cisco.com>
To: Robert Wilton <rwilton@cisco.com>
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Subject: Re: [netmod] Potential additions to rfc6087bis: RegEx guidelines
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I’m not going to say we have solved the underlying problem (too many flavors of regular expression) completely for CDDL, but in CDDL we are using PCRE with anchors then added:

https://tools.ietf.org/html/draft-ietf-cbor-cddl-00#section-3.8.3

(And here is the implementation:
      h[k] = Regexp.new("\\A#{k}\\z")
That should not be too hard to replicate in any language :-)

Grüße, Carsten

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