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From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: S-expression I/O in Ada
Date: Thu, 12 Aug 2010 15:25:06 -0700
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Date: 2010-08-12T15:25:06-07:00
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On 08/12/2010 12:59 PM, Ludovic Brenta wrote:
>
> If I understand your quasi-BNF correctly, an S-Expression in your
> grammar can have only one or two, but not three elements.  This
> contradicts the "(TCP-something (host abc) (port 42) )" example, which
> has three elements.

No, {} means zero or more, so an S-expression can have one or more elements.

Kerensikova (or is it Port�?) provided a more detailed grammar (using the 
trailing '*' from regexps rather than {}) with some additional options.

> http://en.wikipedia.org/wiki/S-expression#Definition

But maybe we're both wrong.

-- 
Jeff Carter
"What I wouldn't give for a large sock with horse manure in it."
Annie Hall
42