std.complex

[Shammah Chancellor]

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.