Function to_pretty_string

libraries/fc/src/string.cpp:26–32

   };

  std::string to_pretty_string( int64_t value )
  {
     std::stringstream ss;
     ss.imbue( {std::locale(), new comma_numpunct} );
     ss << std::fixed << value;
     return ss.str();
  }

#ifdef USE_FC_STRING
  string::string(const char* s, int l) :my(s,l){ }