[TUHS] Question: stdio - Who invented and ...

[Greg A. Woods]

At Mon, 23 Mar 2020 09:46:52 -0400, Clem Cole <clemc at ccc.com> wrote:
Subject: Re: [TUHS] Question: stdio - Who invented and ...
>
> I've forgotten when 'enum' and 'void' got added (which are not in the white
> book - Steve Johnson or Doug may remember).   But, I think they were in the
> V7 compiler, and not Typesetter C.

Since I was recently researching these myself:

There was an extra page in the 7th Edition manual titled "Recent Changes
to C" which described both structure assignment and the enumeration
type:

	https://www.bell-labs.com/usr/dmr/www/cchanges.pdf

This paper appears in the UNIX System III "The C Programming Language
Reference Manual", but there's no mention of "void" in that manual.  On
the other hand the UNIX System III PDP-11 compiler mentions "void" (1980).

I don't see any mention of "void" in 7th Edition sources.  However the
version of 'awk' on the v7addenda tape from "12/2/80" has one "(void)"
cast.  The only mention of "void" in dmr's "The Development of the C
Language" paper (from HOPL-II, 1993) seems to be in the
"Standardization" section where it's mentioned that it's not described
in the first edition of K&R.  There's mention in the CSTR#102 paper from
Sept. 1981 of the "void" type.  The 2.9BSD code uses "void", but the
sources I have don't include a copy of the compiler.

--
					Greg A. Woods <gwoods at acm.org>

Kelowna, BC     +1 250 762-7675           RoboHack <woods at robohack.ca>
Planix, Inc. <woods at planix.com>     Avoncote Farms <woods at avoncote.ca>
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