+ var recv = arguments.first
+ var arg = arguments[1]
+ if is_optional then
+ var value = v.new_var(self.mpropdef.static_mtype.as(not null))
+ v.add("if ({arg} == NULL) \{")
+ v.assign(value, evaluate_expr(v, recv))
+ v.add("\} else \{")
+ v.assign(value, arg)
+ v.add("\}")
+ arg = value
+ end
+ v.write_attribute(self.mpropdef.mproperty, arguments.first, arg)