Creates Cartesian product of iterators.
.create_Cartesian_iterable(initializers, get_next, sspace)
A function that returns list of values, and stops with "StopIteration" message when finished, so that it can be used with the iterators::iter() function to create an iterator that works with foreach.
A list of initializer functions (with no arguments) for iterators.
A function for retrieving next item for an iterator argument; it assumes that the iterator returns NULL when finished.
elements to be used (a list of vectors)