I'm trying to generate permutations of a couple lists. After searching here and on CPAN, I've decided that Algorithm::Loops is exactly what I need! Well, almost exactly.

The problem is that instead of having arrays, I have iterators, so I'm wondering if there is any way to use iterators instead of arrays with Algorithm::Loops.

My iterators are used like:

while( defined( my $a = $iter->() ) ) {
    # do something with $a
}

#note: $iter->() returns a useful value, or undef

[download]

So, I guess what I want is to nest an arbitrary number of while loops instead of an arbitrary number of for loops, conceptually.

I can't just stick everything from $iter into an array, because $iter may be infinite. Does anybody have any ideas on how I could do this?

    -Bryan

In reply to NestedLoops (Algorithm::Loops) and Iterators by mrborisguy

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