in include/spotify/json/codec/tuple.hpp [46:57]
static void encode(
const std::tuple<codecs_type...> &codecs,
encode_context &context,
const T &object) {
const auto &codec = std::get<element_idx>(codecs);
const auto &element = std::get<element_idx>(object);
if (json_likely(detail::should_encode(codec, element))) {
codec.encode(context, element);
context.append(',');
}
tuple_field<T, remaining_count - 1, codecs_type...>::encode(codecs, context, object);
}