class Opal::Parser

def new_op_asgn1(lhs, args, op, rhs) 

def new_op_asgn1(lhs, args, op, rhs)
  arglist = s(:arglist, *args)
  sexp = s(:op_asgn1, lhs, arglist, value(op), rhs)
  sexp.source = source(op)
  sexp
end