[phobos] Fw: cast(bool) vs. opUnary!"!"

[Andrei Alexandrescu]

Walter and I agreed that cast to bool is as good as opUnary. Overloading 
unary "!" is now not possible.

Andrei

Steve Schveighoffer wrote:
> D'oh!
> 
> Sorry, this went to the old list.
> 
> -Steve
> 
> 
> 
> ----- Forwarded Message ----
>> From: Steve Schveighoffer <schveiguy at yahoo.com>
>> To: Phobos <phobos at erdani.com>
>> Sent: Tue, March 9, 2010 9:30:16 AM
>> Subject: cast(bool) vs. opUnary!"!"
>>
>> In the latest dmd 2.041, cast!T was added, and if statements were changed to do:
>>
>> if(s) => if(cast!bool(s))
>>
>> What happened to if translating to:
>>
>> if(!!s)
>>
>> which translates to ! opUnary!("!).  Hm... that's a lot of !'s :)
>>
>> I thought that was the plan, at least it was in the book.  Is that going away?
>>
>> It does make more sense to use cast(bool) because opUnary!"!" could potentially 
>> return a non-bool value.
>>
>> -Steve
> 
> 
> 
>       
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