On Monday, 1 October 2012 at 11:36:43 UTC, Maxim Fomin wrote:
On Sunday, 30 September 2012 at 17:07:19 UTC, monarch_dodra
wrote:
As a rule of thumb, NEVER use opEqual with floating point
types aniways. You need to use some sort of comparison with
leway for error, such as std.math.approxEqual.
It is possible to compare exactly floating point types by
binary comparison, if it provides some benefits.
import std.stdio;
import std.math;
@property float getFloat()
{
return sqrt(1.1);
}
void main()
{
writeln(getFloat is getFloat); // doesn't fail
}
I think that what you are comparing here is the functions (the
address), and not the results of the call. Try
writeln(getFloat() is getFloat()); //*May* fail
Also, "is" works like opEqual on built in types, AFAIK, it
doesn't use any "binary" magic or anything like that.
