Bug. In fact, if I run the example in the documentation, I don't get the documented results. 
use strict;
use warnings;
use Quantum::Superpositions;

print(Quantum::Superpositions->VERSION(), "\n");

if (all(1,2,3)*any(5,6) < 21)
   { print "no alcohol\n"; }
                
if (all(1,2,3)*any(5,6) < 18)
   { print "no entry\n"; }
                
if (any(1,2,3)*all(5,6) < 18)
   { print "under-age\n" }


print(all(1,2,3)*any(5,6), "\n");
print(all(1,2,3)*any(5,6), "\n");
print(any(1,2,3)*all(5,6), "\n");

[download]

I get: 

2.02
no alcohol
no entry
all(any(6,5),any(10,12),any(18,15))
all(any(6,5),any(10,12),any(18,15))
any()

[download]

The documentation says I should get: 

2.02
no alcohol
under-age
all(5,6,10,12,15,18)
all(5,6,10,12,15,18)
any(5,6,10,12,15,18)

[download]

The bug might have been introduced by this change in 2.00:

Replaced the cross product with an iterator. this means that any(@these) != all(@those) does not need to generate the full cartesian product up front. The prime sieve (demo/demo_Primes) now runs in reasonable time/memory.

In reply to Re: Quantum::Superpositions problem by ikegami
in thread Quantum::Superpositions problem by orange

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