Path: utzoo!attcan!uunet!kddlab!titcca!sragwa!wsgw!socslgw!diamond
From: diamond@csl.sony.co.jp (Norman Diamond)
Newsgroups: comp.std.c
Subject: Token pasting in #include directive [repost]
Message-ID: <11160@riks.csl.sony.co.jp>
Date: 21 Nov 89 06:45:03 GMT
Reply-To: diamond@ws.sony.junet (Norman Diamond)
Organization: Sony Computer Science Laboratory Inc., Tokyo, Japan
Lines: 25

This question is also a repost.  It seems to have gotten lost between
kddlabs and the rest of the world, and never got a reply.

According to section 3.8.2, page 89 lines 14 to 17, if pp-tokens are
macro replaced in an #include directive, the implementation might choose
to combine preprocessor tokens between a pair of " characters by, for
example, putting a space between each pair of preprocessor tokens.
(An implementation might do this because it always puts spaces between
preprocessor tokens, because two adjacent preprocessor tokens of - -
are not supposed to become a single real token --.)

Therefore in the example on page 93, line 17 might not yield the result
shown on line 23.  Line 23 is certainly a possibility, but another
possibility, depending on the implementation, is:
  #include "vers2 .h"
with an imbedded space.

I must ask again which carries more weight, the stated rules or the
examples.

-- 
Norman Diamond, Sony Corp. (diamond%ws.sony.junet@uunet.uu.net seems to work)
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