// Parse type.
    if (*s != '}' && *s){


      std::vector<char> buffer;
      const Char* p = s;
      Char c = *p;
      while(p) {
        if (c == '}' || c == ':') {
          break;
        }
        buffer.push_back(c);
        c = *(++p);
      }
      auto str = std::string(&buffer[0], buffer.size());
      std::vector<std::string> formats{"safe"};

      if (str.length() > 1 && (std::find(formats.begin(), formats.end(), str) == formats.end())){
        FMT_THROW(FormatError("wrong format!!!"));
      }


      std::cout << str << std::endl;
      spec.type_ = static_cast<char>(*s++);
    }