Messages in this thread | | | Subject | Re: RFC: booleans and the kernel | From | Xavier Bestel <> | Date | 24 Jan 2002 23:53:46 +0100 |
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le ven 25-01-2002 à 23:47, Timothy Covell a écrit : > On Thursday 24 January 2002 16:33, Xavier Bestel wrote: > > le ven 25-01-2002 à 22:24, Timothy Covell a écrit : > > > On Thursday 24 January 2002 14:39, Oliver Xymoron wrote: > > > > The compiler _will_ turn if(a==0) into a test of a with itself rather > > > > than a comparison against a constant. Since PDP days, no doubt. > > > > > > I thought that the whole point of booleans was to stop silly errors > > > like > > > > > > if ( x = 1 ) > > > { > > > printf ("\nX is true\n"); > > > } > > > else > > > { > > > // we never get here... > > > } > > > > gcc already warns you about such errors. > > > > Xav > > That's funny, I compiled it with "gcc -Wall foo.c" and got no > warnings. Please show me what I'm doing wrong and how > it's _my_ mistake and not the compilers.
[xav@bip:~]$ gcc -Wall a.c a.c: In function `main': a.c:8: warning: suggest parentheses around assignment used as truth value
Xav
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