DSL EXPRESSION:
$i /= 2


AST:
"block" [tt:block] [nt:StatementBlock]
    "/=" [tt:op_slash_equals] [nt:CompoundAssignment]
        "$i" [tt:field_name] [nt:DirectFieldValue]
        "/=" [tt:op_slash_equals] [nt:op_slash_equals]
        "2" [tt:int_literal] [nt:int_literal]

a   b   i          x          y
pan pan 0.50000000 0.34679014 0.72680286
eks pan 1          0.75867996 0.52215111
wye wye 1.50000000 0.20460331 0.33831853
eks wye 2          0.38139939 0.13418874
