On Sat, 11 Jun 2011 18:32:59 -0400, Jonathan M Davis <[email protected]>
wrote:
On 2011-06-11 14:54, Renoir wrote:
Sorry for the question but i'm an absolutely noob
I have:
byte x = 10;
byte y = 3;
x = x + y;
why compilers complains?
Error: cannot implicitly convert expression (cast(int)x + cast(int)
y
) of type int to byte
Have i to make another cast to sum byte + byte?
All integral operations where the types are int or smaller result in an
int
(unless you're dealing with unsigned types, in which case, I believe
that the
result would be uint). So, in this case the result of x + y is int. So,
if you
want the result to be byte, you have to do
x = cast(byte)(x + y);
If I'm not mistaken, the original code should be handled (and compile
without errors) by range propagation. Is that not fully implemented?
-steve
