24-Nov-2013 22:03, Shammah Chancellor пишет:
On 2013-11-24 18:00:45 +0000, Andrei Alexandrescu said:
On 11/24/13 9:54 AM, Joseph Rushton Wakeling wrote:
On 23/11/13 08:43, Ali Çehreli wrote:
import std.stdio;
import std.complex;
void main()
{
writeln(complex(1.0L, -real.infinity) * complex(0.0, 1.0L));
writeln((1L - ireal.infinity) * 1i);
}
The output:
inf-nani <-- "incorrect" according to the quoted page
inf+1i <-- correct
It's because 0.0L * (-real.infinity) evaluates to nan.
Has this been submitted as a bug report?
Andrei
It's more a fundamental problem with a complex type in general. C++
has this issue as well. You need a purely imaginary type with the
appropiate operations between Complex and Imaginary defined.
Can't it just check for the real part being exactly zero and special-
case multiplication for that?
--
Dmitry Olshansky
