On Saturday, 22 November 2014 at 01:57:05 UTC, Andrei
Alexandrescu wrote:
On 11/21/14 1:55 PM, Marco Leise wrote:
Am Wed, 19 Nov 2014 18:20:24 +0000
schrieb "Marc Schütz" <[email protected]>:
I'd say length being unsigned is fine. The real mistake is
that
the difference between two unsigned values isn't signed, which
would be the most "correct" behaviour.
Now take my position where I explicitly write code relying
on the fact that `bigger - smaller` yields correct results.
uint bigger = uint.max;
uint smaller = 2;
if (bigger > smaller)
{
auto added = bigger - smaller;
// Now 'added' is an int with the value -3 !
}
else
{
auto removed = smaller - bigger;
}
Interesting insight. Thanks for the many analytical examples
you're giving in this thread. -- Andrei
It's right.
------smalltest----------------
import std.stdio;
void main()
{
uint a =100;
int b =80;
auto c = a-b;
auto d = b-a;
writeln("c is ",c,", c's type is ",typeid(c));
writeln("d is ",d,", d's type is ",typeid(d));
auto e = b- a;
writeln("e is ",e," e's type is ",typeid(e));
auto f = cast(int)b- cast(int)a;
writeln("f is ",f," f's type is ",typeid(f));
}
-------------end-----------------------------
Only c and f's result is ok.
