On Tuesday, 11 July 2017 at 19:57:06 UTC, Johan Engelen wrote:
On Tuesday, 11 July 2017 at 19:46:00 UTC, Johan Engelen wrote:
The Weka folks would like to see a compile error on negating
unsigned types:
Also this nice hackery would need a workaround:
```
if ((y&(-y))==y)
```
http://www.exploringbinary.com/ten-ways-to-check-if-an-integer-is-a-power-of-two-in-c/
"The two’s complement of x is computed with ~x + 1, which inverts
the bits of x and adds 1 (~x + 1 is equivalent to -x, but
negation is technically illegal for an unsigned integer)."
