Function vfprintf

ThirdParty/fmt/vtkfmt/vtkfmt/printf.h:580–588

template <typename Char>
auto vfprintf(std::FILE* f, basic_string_view<Char> fmt,
              typename vprintf_args<Char>::type args) -> int {
  auto buf = basic_memory_buffer<Char>();
  detail::vprintf(buf, fmt, args);
  size_t size = buf.size();
  return std::fwrite(buf.data(), sizeof(Char), size, f) < size
             ? -1
             : static_cast<int>(size);
}

/**
 * Formats `args` according to specifications in `fmt` and writes the output