half datatype?

[Manu]

On 19 November 2012 01:58, Manu <turkeyman at gmail.com> wrote:

> 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.


**cough** IMPLICIT casting.

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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