On Wednesday, 6 November 2024 at 00:00:48 UTC, Dennis wrote:
That's right, it only removes the deprecation that requires a
double cast to fix, but you still need an explicit cast to
truncate the result of `-s` (which got promoted to `int`) back
to a `short`, unless the compiler can prove at compile time it
will always fit in 16 bits. This analysis is called Value Range
Propagation (VRP) in the specification: You can also use an
assignment operator, which allows overflow without explicit
cast:
s *= -1;
Thank you! *= it is, then. I guess the oddity is actually that
the negation of a long is a long, an int--int. But short and
byte -> int. All of them have a value which won't fit in the
type when negated. I don't mind much, as I have no plans to do a
lot of math on short. But you may get visited by the 8- and
16-bit Mafia at some point! :-)
Andy
long l = -5;
l = -l;
writeln(l);
int i = -5;
i = -i;
writeln(i);
short s = -5;
s = -s;
writeln(s);
byte b = -5;
b = -b;
writeln(b);
