On Saturday, 24 February 2018 at 20:17:12 UTC, Steven
Schveighoffer wrote:
On 2/24/18 3:07 PM, kdevel wrote:
I don't get the point of the deprecation message:
--- intprom.d
import std.stdio;
void main ()
{
short s, t;
t = -s;
}
---
https://dlang.org/changelog/2.078.0.html#fix16997
My goodness! So there is currently no negation operator defined
on short and some other types?
$ dmd intprom.d
intprom.d(6): Deprecation: integral promotion not done for -s,
use '-transition=intpromote' switch or -cast(int)(s)
What shall I do in order to get my template code
void mymain (T) ()
{
:
b[i] = -b [i];
:
}
compiled for any type for which negation is defined?
b[i] = cast(typeof(b[i]))-b[i];
And then use -transition=intpromote.
Note, your function wasn't real code, so maybe if you have the
type of b[i] somewhere it might look better than what I wrote
(like maybe cast(T)-b[i]).
Any objections against leaving out the compiler switch and using
b[i] = cast (T) (0 - b[i]);
instead?
