Function advance_to

extlibs/fmt/include/fmt/format.h:3137–3140

template <typename Char, typename ErrorHandler>
FMT_CONSTEXPR void advance_to(
    basic_format_parse_context<Char, ErrorHandler>& ctx, const Char* p) {
  ctx.advance_to(ctx.begin() + (p - &*ctx.begin()));
}

template <typename ArgFormatter, typename Char, typename Context>
struct format_handler : internal::error_handler {