multiwayUnion

fnauto multiwayUnion(alias less = "a < b", RangeOfRanges)(RangeOfRanges ror)

Computes the union of multiple ranges. The

as a range of ranges and each is assumed to be sorted by less. Computation is done lazily, one union element at a time. multiwayUnion(ror) is functionally equivalent to multiwayMerge(ror).uniq.

"The output of multiwayUnion has no duplicates even when its inputs contain duplicates."

Parameters

`less`	Predicate the given ranges are sorted by.
`ror`	A range of ranges sorted by `less` to compute the intersection for.

Returns

A range of the union of the ranges in ror.