Date: Fri, 8 Dec 2000 14:55:44 -0800 From: "David O'Brien" <obrien@freebsd.org> To: Mike Smith <msmith@freebsd.org> Cc: alpha@freebsd.org Subject: Re: cvs commit: src/sys/alpha/conf GENERIC Message-ID: <20001208145543.A46079@dragon.nuxi.com> In-Reply-To: <200012082109.eB8L9vF02129@mass.osd.bsdi.com>; from msmith@freebsd.org on Fri, Dec 08, 2000 at 01:09:57PM -0800 References: <20001208205603.C401D37B404@hub.freebsd.org> <200012082109.eB8L9vF02129@mass.osd.bsdi.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, Dec 08, 2000 at 01:09:57PM -0800, Mike Smith wrote: > > How is this not a syntax error? > > Because there's a comma between the two statements. > > i = 10, j = malloc(i); > > is a legal expression which returns 10. The comma operator really only > exists for things like Almost -- acutally the value of the expression is `malloc(i)'. ISO/IEC 9899:1999(E) 6.5.17 Comma operator Semantics: The left operand of a comma operator is evaluated as a void expression; thre is a sequence point after its evaluation. The the right operand is evaluated; the result has its type and value.[94] [94] A comma operator does not yeild an lvalue. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20001208145543.A46079>