Method format

extlibs/fmt/include/fmt/printf.h:314–317

  template <typename FormatContext>
  auto format(const T& value, FormatContext& ctx) -> decltype(ctx.out()) {
    internal::format_value(internal::get_container(ctx.out()), value);
    return ctx.out();
  }
};

/** This template formats data and writes the output to a writer. */