Question: How to deserialize arbitrary tag

[thorstenhater]

I have a question and I hope this is right channel to ask. I am trying to deserialize a data format based
on XML using serde, which essentially boils down to

<root>
  <kind name="A" />
  <item kind="A">
    ...
  </item>
  <kind name="B" />
  <B>
    ...
  </B>
</root>

Note how the B tag can be used a shorthand for item kind="B".
I have a working implemention for the non-shorthand part that looks like this

// These have more inner structure, omitted for brevity
#[deriving(Deserialize)]
struct Kind { ... }
#[deriving(Deserialize)]
struct Item { ... }

#[deriving(Deserialize)]
enum RootBody {
   Item(Item),
   Kind(Kind),
}

#[deriving(Deserialize)]
struct Root {
  #[serde(rename="$value")]
  body: Vec<RootBody>,
}

However, how to capture the short-hand feature? Using the pattern from the
JSON examples

#[deriving(Deserialize)]
struct Root {
  #[serde(rename="$value")]
  body: Vec<RootBody>,
  #[serde(flatten)]
  unknown: Map<String, Value>
}

fails with Custom("missing field $value")'. I have also tried deserialize-enum-str and
had no success.

[Mingun]

Duplicate of #326