On Mon, Feb 05, 2018 at 03:23:20PM -0500, Steven Schveighoffer via
Digitalmars-d wrote:
> On 2/5/18 2:30 PM, H. S. Teoh wrote:
> > Even better yet:
> >
> > byte b;
> > b = -b; // Deprecation error
> >
> > WAT????
>
> In the future, -b will be typed as an int, so you can't reassign it to
> b. You can see this today with -transition=intpomote:
>
> Error: cannot implicitly convert expression -cast(int)b of type int to
> byte
[...]
Honestly, this just makes narrow int types basically useless when it
comes to any arithmetic at all.
Sticking to C promotion rules is one of the scourges that continue to
plague D; another example is char -> byte confusion no thanks to C
traditions:
int f(dchar ch) { return 1; }
int f(byte i) { return 2; }
void main() {
pragma(msg, f('a'));
pragma(msg, f(1));
}
Exercise for reader: guess compiler output.
T
--
Trying to define yourself is like trying to bite your own teeth. -- Alan Watts
