Path: ...!feeds.phibee-telecom.net!news.mixmin.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Tim Rentsch Newsgroups: comp.lang.c Subject: Re: Top 10 most common hard skills listed on resumes... Date: Sat, 31 Aug 2024 20:01:10 -0700 Organization: A noiseless patient Spider Lines: 37 Message-ID: <86o758t6vd.fsf@linuxsc.com> References: <87mskwy9t1.fsf@bsb.me.uk> <875xrkxlgo.fsf@bsb.me.uk> <87o75bwlp8.fsf@bsb.me.uk> <871q27weeh.fsf@bsb.me.uk> <20240829083200.195@kylheku.com> <87v7zjuyd8.fsf@bsb.me.uk> <20240829084851.962@kylheku.com> <87mskvuxe9.fsf@bsb.me.uk> <875xrivrg0.fsf@bsb.me.uk> <20240829191404.887@kylheku.com> <86cylqw2f8.fsf@linuxsc.com> <871q2568vl.fsf@nosuchdomain.example.com> <87cylo494u.fsf@nosuchdomain.example.com> <878qwc41g7.fsf@nosuchdomain.example.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Date: Sun, 01 Sep 2024 05:01:10 +0200 (CEST) Injection-Info: dont-email.me; posting-host="1ccc4d5fef9c2c82c9c978d9286151e6"; logging-data="1302907"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19HP/fOs/YDpp8WSepR/OULUdLmc2a1hdo=" User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.4 (gnu/linux) Cancel-Lock: sha1:qI4TizMTTKh66+zuBA7LnCNXfZY= sha1:y2YCMiyYnP0X8NDOwwL2DfJTLCg= Bytes: 3344 Keith Thompson writes: > Bart writes: [...] >> I can also say that the C grammar is buggy: >> >> assignment-expression: >> conditional-expression >> unary-expression asssignment-operator assignment-expression >> >> When attempting to parse an assignment-expression, do you go for a >> conditional-expression or unary-expression? >> >> The latter is a subset of the former. If you go for a >> conditional-expression and find that an assignment-operator >> follows, now you have to perform some analysis on the LHS to see >> if that conditional-expression contains only a unary-expression. >> [...] > > [...] I'm skeptical that the C grammar is buggy. [...] It appears that what Bart means by buggy is different from what you mean. I think what Bart means is that the grammar is not suitable for being used by a particular parsing algorithm. Of course that is not what the C standard means to supply, which is rules of grammar that exactly reflect what syntactic forms are suitable (syntactically) as C programs, without regard to how input source is processed. The C standard's rules of grammar are meant as a declarative specification, not as a procedural description. Bart's complaint is, I believe, a complaint that the grammar rules in the C standard do not provide a suitable procedural description (for the procedural framework he has in mind). They aren't meant to. Your comment is meant, I believe, to be about whether the grammar rules in the C standard provide an accurate declarative specification, which they almost certainly do, especially as regards to the limited area of expression syntax.