* Alan Cox <[email protected]> [2006-07-28 22:14]:
Ar Iau, 2006-07-27 am 13:13 -0700, ysgrifennodd Nicholas Miell:
The compiler knows that "b = !!b;" is a no-op.
b = !!b isn't a no-op.
For _Bool it should be:
Try printf("%d", !!4);
printf("%d, %d", (_Bool)4, !!(_Bool)4);
prints "1, 1". From ISO/IEC 9899:1999:
When any scalar value is converted to _Bool, the result is 0 if the
value compares equal to 0; otherwise, the result is 1.
Greetings,
Lars
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