Article View: comp.lang.misc
Article #5732Re: Third public review of X3J11 C
From: Richard A. O'Keefe
Date: Mon, 12 Sep 1988 06:38
Date: Mon, 12 Sep 1988 06:38
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In article <769@etive.ed.ac.uk> db@lfcs.ed.ac.uk (Dave Berry) writes:
>In article <340@quintus.UUCP> ok@quintus.UUCP (Richard A. O'Keefe) writes:
>>As for infix notation, I wish someone would come up with a standard
>>notation for sequence concatenation: I've seen "+" (which mathematical
============
>>convention reserves for commutative operations) ....
>I've seen "+" used for non-commutative operations, e.g. the definition
>of Standard ML uses it for environment modification.
ML is not mathematics. It would be *so* sensible to use a "product"
symbol "x" or even "*" for string concatenation, because it is
associative with an identity, and exponentiation is exactly the
right operation for iterated concatenation ("ab"**3 = "ababab").
>I've seen concatenation used too (in Icon?).
Not Icon. Icon uses "||", just like PL/I.
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!husc6!think!ames!zodiac!joyce!sri-unix!quintus!ok From: ok@quintus.uucp (Richard A. O'Keefe) Newsgroups: comp.lang.misc Subject: Re: Third public review of X3J11 C Message-ID: <381@quintus.UUCP> Date: 12 Sep 88 06:38:16 GMT References: <8365@smoke.ARPA> <225800053@uxe.cso.uiuc.edu> <8374@smoke.ARPA> <8660@ihlpb.ATT.COM> <908@l.cc.purdue.edu> <340@quintus.UUCP> <769@etive.ed.ac.uk> Sender: news@quintus.UUCP Reply-To: ok@quintus.UUCP (Richard A. O'Keefe) Organization: Quintus Computer Systems, Inc. Lines: 18