Messages in this thread | | | Date | Tue, 29 Aug 2006 14:17:12 +0200 (MEST) | From | Jan Engelhardt <> | Subject | Re: Conversion to generic boolean |
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>> > That is error-prone. Not "==FALSE" but what happens if x is (for some >> > reason) not 1 and then "if (x==TRUE)". >> >> If you're using _Bool, that isn't possible. (Except at the boundaries >> where you have to validate untrusted data -- and the compiler makes that >> more difficult, because it "knows" that a _Bool can only be 0 or 1 and >> therefore your check to see if it's not 0 or 1 can "safely" be >> eliminated.) > >gcc lets you happily assign any integer value to bool/_Bool, so unless
But, it coerces the rvalue into 0 or 1, which may be a gain.
>you write sparse support for actually checking things there's not the >slightest advantage in value range checking.
Jan Engelhardt -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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