| Summary: | Integral promotion rules not being followed | ||
|---|---|---|---|
| Product: | D | Reporter: | Walter Bright <bugzilla> |
| Component: | dmd | Assignee: | No Owner <nobody> |
| Status: | RESOLVED DUPLICATE | ||
| Severity: | normal | CC: | eyal |
| Priority: | P1 | ||
| Version: | D2 | ||
| Hardware: | All | ||
| OS: | All | ||
| See Also: |
https://issues.dlang.org/show_bug.cgi?id=16997 https://issues.dlang.org/show_bug.cgi?id=17633 https://issues.dlang.org/show_bug.cgi?id=5132 |
||
Johan Engelen reports:
import core.stdc.stdio;
void main() {
uint total = 0;
void add(int x) { total += x; }
ubyte popCount() { return 5; }
add(popCount());
add(-popCount());
printf("%u\n", total); // different result from C
}
The trouble is that -popCount() negates the ubyte before promoting to int, instead of after.
16997 has a more succint test case. *** This issue has been marked as a duplicate of issue 16997 ***