BuildError: Cannot lower Set node

[jon-wurtz]

Cannot represent sets in kirin. This is useful for many things, such as comparing sets and other unordered collections of elements. The specific use case is for a switch statement:

if {ind1, ind2} == {0, 1}:
    # Do this
elif {ind1, ind2} == {0, 2}:
    # Do that
elif {ind1, ind2} == {1, 2}:
   # Do the other thing
else:
    raise #659 

This can be overcome right now by (ind1, ind2)==(0,1) or (ind1, ind2)==(1,0) but this gets tiresome for large sets.