auto splitWhen(alias pred, Range)(Range r) if (is(typeof(binaryFun!pred(r.front, r.front)) : bool) && isForwardRange!Range)Splits a forward range into subranges in places determined by a binary predicate called with adjacent elements.
When iterating, one element of r is compared with pred to the next element. If pred returns true, a new subrange is started for the next element. Otherwise, they are part of the same subrange.
If the elements are compared with an inequality (!=) operator, consider
chunkBy instead, as it's likely faster to execute.pred | Predicate for determining where to split. The earlier element in the source range is always given as the first argument. |
r | A forward range to be split. |
r, split such that within a given subrange,
calling pred with any pair of adjacent elements as arguments returns false. Copying the range currently has reference semantics, but this may change in the future.
See_also:
splitter, which uses elements as splitters instead of element-to-elementrelations.