Is there a way to deserialize arbitrary JSON using Serde without creating fine-grained objects?
This was added in serde_json 1.0.29 as the type RawValue. It must be enabled using the raw_value feature and then placed behind a reference:
extern crate serde; // 1.0.79#[macro_use]extern crate serde_derive; // 1.0.79extern crate serde_json; // 1.0.30, features = ["raw_value"]#[derive(Serialize, Deserialize)]struct DataBlob<'a> { id: &'a str, priority: u8, payload: &'a serde_json::value::RawValue,}fn main() { let input = r#"{ "id": "cat", "priority": 42, "payload": [1, 2, 3, 4] }"#; let parsed = serde_json::from_str::<DataBlob>(input).expect("Could not deserialize"); let output = serde_json::to_string(&parsed).expect("Could not serialize"); assert!(output.contains("payload"));}