Bartosz Milewski seems to like D more than C++ now :)

[QAston]

On Friday, 20 September 2013 at 07:39:47 UTC, QAston wrote:
> On Thursday, 19 September 2013 at 22:46:09 UTC, Andrei 
> Alexandrescu wrote:
>> On 9/19/13 3:18 PM, Szymon Gatner wrote:
>>> I had similar thoughts when watching GoingNaive 2013:
>>> http://bartoszmilewski.com/2013/09/19/edward-chands/
>>
>> Nice piece.
>>
>>> I was more and more scared with every talk and now I am 
>>> valualizing my
>>> polymorphic types a'la Sean Parent
>>
>> That I think is sketchy advice.
>>
>>
>> Andrei
>
> What Sean Parent does in his value semantics talk is basically 
> an interface adapter for a struct, wrapped in a struct 
> providing implicit conversions.
>
> By using structs by default and adapting them to interfaces as 
> needed you get to have the smallest possible overhead on a 
> single function call - either no virtual dispatch or 1 virtual 
> dispatch. When writing adapters to interfaces you get 2 or more.
>
> The other benefit is that approach is reducing dependencies you 
> need to know about when you use the wrapper type - the approach 
> would not work in D due to lack of argument dependent lookup so 
> you need to write the adapter type (for a particular type you 
> want to convert) yourself anyways. And I think it's better that 
> way.
>
> In the end the whole thing is just adapter design pattern 
> applied to C++.
http://dpaste.dzfl.pl/811800a5