Function simple_conjoin

Lib/test/test_generators.py:1911–1924

(gs)

# each slot depend on the values iterated at previous slots.

def simple_conjoin(gs):

    values = [None] * len(gs)

    def gen(i):
        if i >= len(gs):
            yield values
        else:
            for values[i] in gs[i]():
                for x in gen(i+1):
                    yield x

    for x in gen(0):
        yield x

# That works fine, but recursing a level and checking i against len(gs) for
# each item produced is inefficient.  By doing manual loop unrolling across