On Friday, 27 February 2015 at 09:27:49 UTC, Ilya Yaroshenko
Unfortunate overlap in functionality is unfortunate.
$ git grep -i kahan
std/algorithm/iteration.d:$(D sum) uses the $(WEB
std/algorithm/iteration.d:Kahan summation) algorithm.)
std/algorithm/iteration.d: return sumKahan!E(seed,
std/algorithm/iteration.d:// Kahan algo
std/algorithm/iteration.d:private auto sumKahan(Result,
R)(Result result, R r)
Would one of the following solutions be fortunate ?
I. Use alias of fsum!(Summation. Appropriate) for floating
version of std.algorithm.sum.
Appropriate algorithm performs D Pairwise summation for
random access ranges.
Otherwise performs D KBN summation of floating point and
complex numbers and
Kahan summation of user defined types.
II. Move this submodule to std.algorithm.iteration.
III. Remove Kahan (including KBN and KB2) and Pairwise
algorithms from fsum, and use only Precise algorithm for
Probably, I have found good solution. Summator struct can be
represented in std.numeric and std.algorithm.sum can be extended
by the new functionality. So there will be no overlap in