Date: Thu, 10 Jul 2008 01:10:45 +0200 From: Daniel Gerzo <danger@FreeBSD.org> To: Roman Kurakin <rik@inse.ru> Cc: David Malone <dwmalone@maths.tcd.ie>, cvs-src@FreeBSD.ORG, Daniel Gerzo <danger@FreeBSD.ORG>, src-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re[2]: cvs commit: src/share/man/man9 style.9 Message-ID: <753889164.20080710011045@rulez.sk> In-Reply-To: <4874FE82.5090809@localhost.inse.ru> References: <200807091404.m69E4jiC075715@repoman.freebsd.org> <20080709154945.GA47824@zim.MIT.EDU> <4874FE82.5090809@localhost.inse.ru>
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Hello guys, Wednesday, July 9, 2008, 8:08:02 PM, has been written: >>> -Do not declare functions inside other functions; ANSI C says that >>> -such declarations have file scope regardless of the nesting of the >>> -declaration. >>> -Hiding file declarations in what appears to be a local >>> -scope is undesirable and will elicit complaints from a good compiler. >>> +Do not declare functions inside other functions; nested functions are >>> +a GCC extension and are not permitted by ANSI C. >>> >> >> We use lots of extensions that aren't strict ANSI C. I think the >> real reason not to use them is that gcc's nested functions are >> particularly unwieldily. First, they're not true lexical closures >> (and can't be), which makes them much less useful. Second, they >> are unsupported unless a number of assumptions are met, e.g., must >> have an executable stack, must be able to invalidate the I cache >> from userland, and must not have separate I and D address spaces. >> Nested functions abominable enough that Apple disabled the feature >> in OS X's build of gcc --- and the Sun and Intel compilers don't >> support them, even though Intel claims nearly complete gcc >> compatibility. >> > I think from non-technical side, nested functions are not expected by > most programmers. > From my point of view there are many new extensions that a good for > quick hacking, but > not for the production code. So may I leave my change in the current state, or do you guys want me to do some additional changes? -- Best regards, Daniel mailto:danger@FreeBSD.org
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