half datatype?

[Manu]

I'm sure that's true, I've just always used it to gain access to members of
embedded types, kinda of like abstraction for 'struct's. It hadn't occurred
to me to support explicit casting in that way.


On 18 November 2012 18:31, Andrei Alexandrescu <
SeeWebsiteForEmail at erdani.org> wrote:

> On 11/18/12 7:30 AM, Manu wrote:
>
>> On 18 November 2012 14:01, David Nadlinger <see at klickverbot.at
>>
>> <mailto:see at klickverbot.at>> wrote:
>>
>>     On Sunday, 18 November 2012 at 11:21:37 UTC, Manu wrote:
>>
>>         someFloat = someHalf <- doesn't work, because a cast operator
>>         expects an
>>         explicit cast, even though this is a lossless conversion and
>>         should be
>>         exactly the same as someDouble = someFloat.
>>
>>         Thoughts?
>>
>>
>>     ---
>>     struct Half {
>>          float toFloat() { return 3.14f; }
>>          alias toFloat this;
>>     }
>>
>>     void test() {
>>          Half h;
>>          float f = h;
>>          double d = h;
>>     }
>>     ---
>>
>>     Works for you?
>>
>>
>> Interesting approach to the implicit cast problem. Very handy trick.
>>
>
> Well that was quite explicitly part of the purpose of alias this.
>
> Andrei
>
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