1. You're writing C++. You've really lost half the battle laready :) and
2. Writing correct templated code is difficult and should generally be reserved for when you're writing a library; and
3. For complicatred types like this, one should strive to increase readability by using type aliases, assuming your language supports it (eg C++ and Hack do). It's not always possible.
I generally agree but there are two problems:
1. You're writing C++. You've really lost half the battle laready :) and
2. Writing correct templated code is difficult and should generally be reserved for when you're writing a library; and
3. For complicatred types like this, one should strive to increase readability by using type aliases, assuming your language supports it (eg C++ and Hack do). It's not always possible.
Complicatred: The hatred we feel for complication.