But code using these monadic operations can also be quite clean… toy example: auto askForUsername = [&] { … }; auto lookupUserByName = [&](auto name) { …

But code using these monadic operations can also be quite clean… toy example: auto askForUsername = [&] { … }; auto lookupUserByName = [&](auto name) { … }; auto printUserDetails = [&](auto userId) { … }; auto details = askForUsername() .and_then(lookupUserByName) .and_then(printUserDetails);