Function format

include/fmt/ranges.h:472–490

  template <typename R, typename FormatContext>
  FMT_CONSTEXPR auto format(R&& range, FormatContext& ctx) const
      -> decltype(ctx.out()) {
    auto out = ctx.out();
    auto it = detail::range_begin(range);
    auto end = detail::range_end(range);
    if (is_debug) return write_debug_string(out, std::move(it), end);

    out = detail::copy<Char>(opening_bracket_, out);
    int i = 0;
    for (; it != end; ++it) {
      if (i > 0) out = detail::copy<Char>(separator_, out);
      ctx.advance_to(out);
      auto&& item = *it;  // Need an lvalue
      out = underlying_.format(item, ctx);
      ++i;
    }
    out = detail::copy<Char>(closing_bracket_, out);
    return out;
  }
};

FMT_EXPORT