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From: henry@utzoo.UUCP (Henry Spencer)
Newsgroups: net.lang.c
Subject: Re: mod.std.c Digest Volume 4 : Issue  14
Message-ID: <5253@utzoo.UUCP>
Date: Fri, 15-Mar-85 13:15:52 EST
Article-I.D.: utzoo.5253
Posted: Fri Mar 15 13:15:52 1985
Date-Received: Fri, 15-Mar-85 13:15:52 EST
References: <9178@brl-tgr.ARPA>
Organization: U of Toronto Zoology
Lines: 19

>    |My personal view is that the
>    |occurrence of trigraph escapes in the same file as non-ISO characters
>    |(i.e., stuff written both ways) should be cause for an error message.
>    |This would at least simplify conversion.
> 
> It may be a blind spot on my part, but how is the compiler to know
> that 
> 	"??<whatever> ... \<whatever>" 
> is not really,
> 	"??<whatever> ... <Nat'l char><whatever>",
> which ought to be permissible?

The compiler has to know what character code its input is using, so
it already knows whether an octal 0134 is a backslash or something
else.  The situation in which I propose an error message can arise
only in an ASCII compiler.
-- 
				Henry Spencer @ U of Toronto Zoology
				{allegra,ihnp4,linus,decvax}!utzoo!henry