From owner-freebsd-current  Wed May 20 00:58:05 1998
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Date: Wed, 20 May 1998 17:52:18 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199805200752.RAA21587@godzilla.zeta.org.au>
To: grog@lemis.com, jdp@polstra.com
Subject: Re: /sys/device.h: warning: 1 trigraph(s) encountered
Cc: current@FreeBSD.ORG
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>>       DV_TTY                  /* serial line interface (???) */
>> 
>> The ??? have the form of a trigraph, but for some reason the compiler
>> complains about them though they're in a comment.
>
>That's because the ISO C standard says that the compiler must map
>trigraphs in phase 1 of the translation, but it doesn't eliminate
>comments until phase 3.

Also, there is a trigraph here, namely ??).  (???) here gets converted
to (?].

Bruce

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