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From: diamond@jit345.swstokyo.dec.com (Norman Diamond)
Newsgroups: comp.std.c
Subject: Re: stringizing
Message-ID: <1991Apr23.075527.19443@tkou02.enet.dec.com>
Date: 23 Apr 91 07:55:27 GMT
References: <14888@darkstar.ucsc.edu>
Sender: usenet@tkou02.enet.dec.com (USENET News System)
Reply-To: diamond@jit345.enet@tkou02.enet.dec.com (Norman Diamond)
Organization: Digital Equipment Corporation Japan , Tokyo
Lines: 22

In article <14888@darkstar.ucsc.edu> daniel@terra.ucsc.edu (Daniel Edelson) writes:
>	#define  str(x) #x
>		printf("%s\n", str(  hello\t\n\vworld\n\n));
>Is the output from this program supposed to be:
>	hello world

Section 2.1.1.2, page 6 lines 35-36 in the Dec. 1988 draft:
  Whether each nonempty sequence of white-space characters other than newline
  is retained or replaced by one space character is implementation-defined.
[This is before preprocessing.]

Therefore, the output can be either (with two leading spaces):
  hello\t\n\vworld\n\n\n
or (with one leading space and two imbedded spaces):
 hello \n world\n\n\n
(including, in each case, the last \n from the printf format string).

However, it cannot be (regardless of the number of leading spaces) just:
 hello world\n
--
Norman Diamond       diamond@tkov50.enet.dec.com
If this were the company's opinion, I wouldn't be allowed to post it.