I took the liberty of cross posting this earlier to TUHS and I got an authoritative answer :) -Larry
> Begin forwarded message: > > From: Ken Thompson <k...@google.com> > Subject: Re: [TUHS] Fwd: [Simh] An abandoned piece of K&R C > Date: 2017, November 3 at 2:30:08 PM EDT > To: Lawrence Stewart <stew...@serissa.com> > > it's news to me. > > > On Fri, Nov 3, 2017 at 5:53 AM, Lawrence Stewart <stew...@serissa.com> wrote: >> This caught my attention. Did early C really have min and max? Were they >> used for anything? In those days I was a BCPL user, which IIRC, did not >> have such things. >> >> -Larry >> >> Begin forwarded message: >> >> From: Leo Broukhis <l...@mailcom.com> >> Subject: [Simh] An abandoned piece of K&R C >> Date: 2017, November 3 at 1:14:42 AM EDT >> To: "simh@trailing-edge.com" <simh@trailing-edge.com> >> >> https://retrocomputing.stackexchange.com/q/4965/4025 >> >> >> In the UNIX V7 version of the C language, there were the /\ (min) and the \/ >> (max) operators. In the source of the scanner part of the compiler, >> >> case BSLASH: >> if (subseq('/', 0, 1)) >> return(MAX); >> goto unkn; >> >> case DIVIDE: >> if (subseq('\\', 0, 1)) >> return(MIN); >> ... >> >> However, attempting to use them reveals that the corresponding part in the >> code generator is missing. Trying to compile >> >> foo(a, b) { return a \/ b; } >> >> results in >> >> 1: No code table for op: \/ >> >> The scanner piece survived in the copies of the compiler for various systems >> for several years. I tried to look for copies of the code generator table >> which would contain an implementation, but failed. Has anyone ever seen a >> working MIN/MAX operator in K&R C? >> >> Thanks,Leo >> >> _______________________________________________ >> Simh mailing list >> Simh@trailing-edge.com >> http://mailman.trailing-edge.com/mailman/listinfo/simh >> >>
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