cs2 : CodeSegment ds1 ds1
cs2 = cs id

cs1 : CodeSegment ds1 ds1
cs1 = cs (\d -> goto cs2 d)

cs0 : CodeSegment ds0 ds1
cs0 = cs (\d -> goto cs1 (record {c = (ds0.a d) + (ds0.b d)}))

main : ds1
main = goto cs0 (record {a = 100 ; b = 50})