attribute names with encoded information

[evbo]

Say I have some field name that encodes additional information:

{
  "gsi1pk": "p",
  "gsi1sk": "s",
}

What's the simplest way to deserialize it into a structure based on string (regex) patterns?:

struct Gsi {
  ordinal: u8,
  partition: String,
  sort: String 
}

So the result would be:

Gsi{ordinal: 1, partition: "p".into(), sort: "s".into() }

If this is too difficult, what about deserializing the fields individually, to at least get something like?:

GsiPk{ordinal: 1, partition: "p".into()}
GsiSk{ordinal: 1, sort: "s".into()}