Project Elvis

[Nemanja Boric]

On Sunday, 29 October 2017 at 17:19:44 UTC, Jonathan M Davis 
wrote:
> On Sunday, October 29, 2017 16:44:39 Ola Fosheim Grøstad via 
> Digitalmars-d wrote:
>> On Sunday, 29 October 2017 at 16:29:57 UTC, Jonathan M Davis
>>
>> wrote:
>> > valid using ?:, I would think that you'd want to be doing 
>> > the same check with stuff like if statements anyway. So, it 
>> > sounds to me like overloading opCast!bool would work just 
>> > fine.
>>
>> If you try to do:
>>
>> some_float ?: 0.0
>>
>> then it will do nothing as cast(bool)std.math.NaN(0) => true
>
> NaN is supposed to always be false.

OT, but I had to :-)

```
void main()
{
	import std.stdio;
	
	float x;
	x? writeln("Oh no, a NaN!") : writeln("All good.");
}
```

Same happens for assert(float.nan) - it doesn't fail.