def ref(t):
if isvar(t):
newt = l + t
vs.add(newt)
return newt
elif not istuple(t):
return t
else:
return tuple(map(ref, t))
def relocate(t):
if isvar(t):
newt = vtop + t
if newt >= len(vs):
extendTo(newt, vs)
return newt
elif not istuple(t):
return t
else:
return tuple(map(relocate, t))