Article View: comp.std.c
Article #4320Re: Grammar for Switch Statement
From: Tanmoy Bhattacharya
Date: Thu, 02 Nov 1995 14:47
Date: Thu, 02 Nov 1995 14:47
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2074 bytes
In article <4797ni$avq@news0.rain.rg.net>, Paul Long <plong@perf.com> writes: <snip> |> >Next question is why they require parentheses... |> |> I see what you mean--switch doesn't really need parentheses. |> (That is, if we keep the case keyword. For example, |> "switch 5+2 case -3:..." is okay, whereas "switch 5+2 -3:..." |> is ambiguous.) Maybe it was done to make it look like the |> other control statements, which need parentheses (for example, |> "if a + 3;" would be ambiguous). I'll bet that's it. Isn't `switch (5) - 3;' perfectly valid though useless (i.e. has the same effect as the null statement) statement? I think the grammar becomes ambiguous the moment `statement' is allowed to follow `expression' without any delimiter. <snip> |> This is off-topic (not Standard-C related), but why do most |> programmers use parentheses around the value in a return |> statement? They are absolutely not needed, and I think it looks a |> lot cleaner without them. A colleague of mine said that she Wasn't it needed in some early versions of C? Maybe it is a frozen piece of history. Cheers Tanmoy -- tanmoy@qcd.lanl.gov(128.165.23.46) DECNET: BETA::"tanmoy@lanl.gov"(1.218=1242) Tanmoy Bhattacharya O:T-8(MS B285)LANL,NM87545 H:#9,3000,Trinity Drive,NM87544 Others see <gopher://yaleinfo.yale.edu:7700/00/Internet-People/internet-mail>, <http://alpha.acast.nova.edu/cgi-bin/inmgq.pl>or<ftp://csd4.csd.uwm.edu/pub/ internetwork-mail-guide>. -- <http://nqcd.lanl.gov/people/tanmoy/tanmoy.html> fax: 1 (505) 665 3003 voice: 1 (505) 665 4733 [ Home: 1 (505) 662 5596 ]
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Path: arc1-ca.pugleaf.net!qcd.lanl.gov!tanmoy From: tanmoy@qcd.lanl.gov (Tanmoy Bhattacharya) Newsgroups: comp.std.c Subject: Re: Grammar for Switch Statement Date: 2 Nov 1995 14:47:19 GMT Organization: Los Alamos National Laboratory Distribution: world Message-ID: <47alln$ph1@newshost.lanl.gov> References: <470ih7$mvh@gaia.ns.utk.edu> <4713rc$3d9@solutions.solon.com> <476n45$8g0@jrdgwm.jrd.dec.com> <4797ni$avq@news0.rain.rg.net> NNTP-Posting-Host: qcd.lanl.gov