I'm working fine in VS but it's wrong here, is it my problem?

In file included from main.cpp:7:
./tests.cpp:6:23: error: static_assert expression is not an integral constant expression
        static_assert(Hi::value[0] == 'H' && Hi::value[1] == 'i' && Hi::value[2] == '\0', "");
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./tests.cpp:6:23: note: read of pointer to element of array without known bound is not allowed in a constant expression
1 error generated.

what's this kata want to ask me?

I believe this Kate deserves a higher rank. It took me approximately an hour to engage in mathematical reasoning and resolve precision-related matters.

There will be 'RVO'.

perhaps you can use signature.cbegin()

So how should it pronouce in Italian?

what's this??

cute

WTF

Woah! I just found out you can use boost here！

I'm sorry... My first day using this site.. How do I delete this line of code? I can't find the edit button...