C++ Ranges proposal for the Standard Library

[Walter Bright via Digitalmars-d]

On 10/18/2014 8:17 AM, Andrei Alexandrescu wrote:
> On 10/18/14, 4:43 AM, John Colvin wrote:
>> auto kahanSum(R)(R input)
>> {
>>      double sum = 0.0;
>>      double c = 0.0;
>>      foreach(double el; input)
>>      {
>>          double y = el - c;
>>          double t = sum + y;
>>          c = (t - sum) - y;
>>          sum = t;
>>      }
>>      return sum;
>> }
>
> No need to implement it. http://dlang.org/phobos/std_algorithm.html#.sum

Wow, I hadn't noticed that before. Sweet!