func (f *Function) Builtin(call *ssa.Call, builtin *ssa.Builtin) (string, *Error) {
obj := builtin.Object()
if builtin.Name() == "len" && obj.String() == "builtin len" {
return f.Len(call)
} else {
return ErrorMsg(fmt.Sprintf("builtin (%v) not supported", builtin.Name()))
}
}
