On Friday, 9 August 2013 at 15:18:47 UTC, Dicebot wrote:
On Friday, 9 August 2013 at 15:11:42 UTC, michaelc37 wrote:
forgive me if i'm doing something stupid, i'm extremely tired
and trying to avoid drinking coffee.
void main()
{
int[] arr = [0, 1, 2, 3, 4, 5, 6];
//check 1
if (-1 > arr.length)
writefln("WTF -> %d is greater than %d ????", -1,
arr.length);
else
writefln("GOOD -> %d is NOT greater than %d", -1,
arr.length);
}
here is my output:
WTF -> -1 is greater than 7 ????
And signed vs unsigned design issues pops up again! :)
*summoning bearophile*
On topic: arr.length has type size_t which is unsigned integer.
-1 gets silently casted to unsigned, resulting in size_t.max
value (0xFFF..) - which is obviously bigger than actual length.
I believe it should be a compile-time error but, unfortunately,
this is unlikely to happen.
Ahhh thanks for the explaination. if this was a compile time
error, i would have saved precious time; I found strange behavior
while writing some other related code, and I kept overlooking the
condition thinking "it cant be that".
