martin-g commented on code in PR #3545:
URL: https://github.com/apache/avro/pull/3545#discussion_r2522606982
##########
lang/c++/include/avro/Specific.hh:
##########
@@ -165,6 +166,44 @@ struct codec_traits<double> {
}
};
+/**
+* codec_traits for Avro optional.
+*/
+template<typename T>
+struct codec_traits<std::optional<T>> {
+ /**
+ * Encodes a given value.
+ */
+ static void encode(Encoder &e, const std::optional<T> &b) {
Review Comment:
> AVRO optional
There is no such thing as `Avro optional`. The type is `Union`. It can have
from 2 to N variants.
"null" is not a mandatory variant. It could be at any index in the variants,
but usually it is the first one. Without a Schema it is a wild guess.
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