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We don't need to produce groups from the ABNF itself.

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Dimitri Fontaine 2013-09-07 23:32:36 +02:00
parent cc50052160
commit fb0370ea4b
1 changed files with 5 additions and 1 deletions
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6
abnf.lisp
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@ -251,7 +251,11 @@ This table comes from http://tools.ietf.org/html/rfc2234#page-11 and 12.
(:lambda (group)
(destructuring-bind (open ws1 a ws2 close) group
(declare (ignore open close ws1 ws2))
`(:group ,a))))
;; we need the grouping when parsing the ABNF syntax, but once this
;; parsing is done there's no ambiguity possible left and we don't
;; need the grouping anymore in the resulting regular-expression parse
;; tree.
a)))
(defrule option (and "[" n-wsp alternation n-wsp "]")
(:lambda (option)