Is this a bug?

[Lars T. Kyllingstad]

On Sun, 09 Jan 2011 23:09:26 -0600, Christopher Nicholson-Sauls wrote:

> On 01/09/11 16:28, Sean Eskapp wrote:
>> This code works fine:
>> 
>> 	int[] arr = [ 1, 2, 3, 4, 5 ];
>> 	auto myMax = function int(int a, int b) { return (a > b) ? a : 
b; };
>> 	auto biggest = reduce!(myMax)(arr);
>> 
>> But passing the function literal directly to reduce causes an error. Is
>> this intentional?
> 
> I believe this is because binaryFun (which reduce uses) takes a template
> alias parameter, which must refer to something bound -- aka, having a
> name.

Template alias parameters do accept anonymous functions now (but I don't 
think it's that long ago that they didn't).  This works in DMD 2.051, at 
least:

  auto biggest = reduce!((a, b) { return a > b ? a : b; })(arr);

-Lars