bufferingbreaks.rs

#[macro_use] extern crate serde_derive;
extern crate serde_json;
use std::collections::HashMap;

#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[serde(tag = "type")]
enum X {
    Hash { x: HashMap<u32, u32> },
}

fn main() {
    println!("{:#?}", serde_json::from_str::<X>(r#"
        {
            "type": "Hash",
            "x": {
                "1": 42,
                "2": 23
            }
        }
    "#).unwrap());
}

error.txt

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value:
 ErrorImpl { code: Message("invalid type: string \"1\", expected u32"), line: 0, column: 0 }'