Method flush

Source/ThirdParty/fmt/base.h:1884–1890

  }

  void flush() {
    auto size = this->size();
    this->clear();
    const T* begin = data_;
    const T* end = begin + this->limit(size);
    while (begin != end) *out_++ = *begin++;
  }

 public:
  explicit iterator_buffer(OutputIt out, size_t n = buffer_size)