Path: csiph.com!eternal-september.org!feeder.eternal-september.org!nntp.eternal-september.org!.POSTED!not-for-mail From: Tim Rentsch Newsgroups: comp.lang.c Subject: Re: Constants and undefined behavior Date: Sat, 15 Aug 2026 07:36:36 -0700 Organization: A noiseless patient Spider Lines: 23 Message-ID: <86bjb35u2z.fsf@linuxsc.com> References: <10v7b32$2u85v$1@dont-email.me> <110k0mp$329k6$1@dont-email.me> <110me3t$gli$1@reader1.panix.com> <86mrwd7c49.fsf@linuxsc.com> <111u2lj$8q3$1@reader1.panix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Date: Sat, 15 Aug 2026 14:36:37 +0000 (UTC) Injection-Info: dont-email.me; logging-data="3635087"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX199g8sWJrBCtDKSDWpWsmyWUOeedI43MdY="; posting-host="f88cfb7384c39afe54609bf3101f3803" User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.4 (gnu/linux) Cancel-Lock: sha1:wiFPLQACrHOB+EzLAFW19oVBYvs= sha1:6bnuqh5w35R59qLkdqW2GmQ6RHU= sha256:q1s1EQHb7Ln3fyUvr2RqT0nqyCAnqeD3l9s/6oV7LX0= sha1:3dcUSGGRRdf/hS5ASDG38+ZmP0Q= sha256:XZYA20NpWNua0zINfKRnUenUwVCq8mHp2iPLAqNPZDs= Xref: csiph.com comp.lang.c:401209 cross@spitfire.i.gajendra.net (Dan Cross) writes: > In article <86mrwd7c49.fsf@linuxsc.com>, > Tim Rentsch wrote: > >> cross@spitfire.i.gajendra.net (Dan Cross) writes: >> >> [...] >> >>> "Undefined Behavior", in C, in the manner usually discussed in >>> this newsgroup, was introduced with the first standard. >> >> The term but not the concept, which was there since the >> early days of C -- at least since K&R in 1978, and very >> likely earlier (I haven't reviewed any of the earlier >> descriptions of the language). > > [...] not really. I've read K&R, both editions, and the > first really doesn't define a concept that gives such supreme > latitude to the compiler. [...] I didn't say any term was defined, only that such a concept is present in the writing.