Function vprintf

extlibs/fmt/include/fmt/printf.h:658–662

template <typename S, typename Char = char_t<S>>
inline int vprintf(
    const S& format,
    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args) {
  return vfprintf(stdout, to_string_view(format), args);
}

/**
  \rst