Re: Why do some T.init evaluate to true while others to false?

[ArturG via Digitalmars-d-learn]

On Friday, 27 May 2016 at 15:07:50 UTC, Adam D. Ruppe wrote:

On Friday, 27 May 2016 at 14:56:28 UTC, ArturG wrote:

   float f;
   if(f is float.init) "float init".writeln;
   f = float.nan;
   if(f is float.init) "float nan".writeln;

You changed it to a value that isn't float.init, so of course it isn't going to match!

float.nan and float.init are NOT the same thing. float.init is a kind of NAN, but not the same kind.

yes but i have to check for that when some one does

float.nan.checkThen!((f){ this fun should not run });

which should be the same as

float.init.checkThen!((f){ this fun should not run });