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![Re: [3.4-stable] lib/libc/stdlib/getopt_long.c](http://unixadmintalk.com/iconimages/f20/re-3-4-stable-lib-libc-stdlib-getopt_long-c_ltr.gif)
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02-18-2008, 06:47 AM
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 Re: [3.4-stable] lib/libc/stdlib/getopt_long.c My copy of Kernighan & Ritchie, 2nd edition, has 4 entries in the index for the && operator, and they ALL make specific mention that left to right order of evaluation for the && and || operators is guaranteed. Less emphasis is given to the equally important fact that evaluation of the expression is stopped "as soon as truth or falsehood is known". The book comments: "Most C programs rely on these properties." On Fri, Feb 13, 2004 at 05:43:50PM +0100, Ed White wrote: > On Friday 13 February 2004 17:32, Ed White wrote: > > if (place[1] != '\0' && *++place == '-' && place[1] == '\0') { > > Little note: the code works only if the compiler build the executable keeping > the same checks order > > 1) place[1] != '\0' > 2) *++place == '-' > 3) place[1] == '\0' > > > I've always read that it shouldn't be trusted so much...      |
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