Support flattened externally tagged enums with default attributes #2687
+99
−9
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This adds a custom error type for
FlatMapDeserializer
, which distinguishes the specificno variant of enum {name} found in flattened data
error.This error is then used in
deserialize_map
inserde_derive
tomatch
on the returned error, and if the field or container has adefault
attribute it uses theexpr_is_missing
to provide a default value.Fixes #1626