D popularity

[H. S. Teoh]

On Mon, Jan 21, 2013 at 09:53:35PM +0100, F i L wrote:
> On Monday, 21 January 2013 at 20:48:22 UTC, Walter Bright wrote:
> >On 1/21/2013 12:31 PM, Rob T wrote:
> >>I have to wonder if many of the features can be generalized down
> >>into less
> >>features without sacrificing anything.
> >
> >Yeah, well, that's the major thing about any language design!
> 
> and on that note I hear the C++ community (at least one key member)
> is proposing a:
> 
>     auto add(auto a, auto b) {
>         return a + b;
>     }
> 
> pretty-template syntax! I wouldn't feel right if C++ had something
> that elegant and D did not *wink* *wink* :-)

D already has that:

	auto add(T,U)(T a, U b) {
		return a + b;
	}

In fact, D does it one step better with signature constraints:

	auto add(T,U)(T a, U b)
		if (is(typeof(a+b)))
	{
		return a + b;
	}

That way, the compiler won't even bother to instantiate the template if
the two types can't be added in the first place.


T

-- 
Life would be easier if I had the source code. -- YHL