5132 – ~ unary operator silently different from C

~ <type> => <type> for all integer types in D, however
~ <type> => int for small integer types in C.
This is a source of silently different behavior between D and C at least in unsigned integer types.
example:
// test.d
import std.stdio;
void main(){
 ushort x = 0xffff;
 writefln("%08x", ~x+1u);
}
// test.c
#include <stdio.h>
void main(void){
 unsigned short x = 0xffff;
 printf("%08x", ~x+1u);
}

Documented the difference.

Documented the difference.

https://github.com/dlang/dlang.org/commit/4cd3f38bbabdde30b280738dab4f4184c06f05f9