I dunno, I've never actually worked in C++, but I tried it out online and it didn't seem to work.

Using the C++ standard library beyond the C backwards compatible parts? What devilry is this‽

I ran

#include 
#include 

int main()
{
  std::string name;
  std::cout << "you"+"me";
}

Using cpp.sh, and got the following error:

main.cpp:7:21: error: invalid operands to binary expression ('const char[4]' and 'const char[3]')
  std::cout << "you"+"me";
               ~~~~~^~~~~
1 error generated.

edit: lemmy seems to be determined to convert my less than characters to their HTML entity codes, but the error is meant to point to the "+" sign.

I think your link has a double encoded % at the end: %25

The correct link is https://en.cppreference.com/w/cpp/string/basic_string/operator2B