Also, std::optional, which is analogous to Maybe. Of course, both have been in boost for some time now. C++ so far has been doing this at the library level. Bu

Also, std::optional, which is analogous to Maybe. Of course, both have been in boost for some time now. C++ so far has been doing this at the library level. But it remains to be seen if they will make their way into actual interfaces, for example in standard algorithms.