std

[jhkkhtd]

you use many symbols like "std ::" , adding one line that using namespace std will be ok!

[Dobiasd]

I'm not sure if you are talking about the header files or the documentation, so I will answer both.

• header files: using namespace std here would mean every client automatically also has std imported. This can produce unneeded name colisions. So header files should never be using any namespace to give the client the freedom to decide on their own.
• documentation: I intentionally explicitly qualified every call here, to make clear what comes from std and what comes from fplus. Some even consider using namespace std bad practice in general. But if you use FunctionalPlus you can of course utilize using namespace std as you like in your code.

[jhkkhtd]

ok ,,,i think that you have teached me something, you are right !