# Function serde_json::to_value

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    pub fn to_value<T>(value: T) -> Result<Value, Error> where
        T: Serialize,

Expand description

Convert a `T` into `serde_json::Value` which is an enum that can represent any valid JSON data.

## Example

    use serde::Serialize;
    use serde_json::json;

    use std::error::Error;

    #[derive(Serialize)]
    struct User {
        fingerprint: String,
        location: String,
    }

    fn compare_json_values() -> Result<(), Box<Error>> {
        let u = User {
            fingerprint: "0xF9BA143B95FF6D82".to_owned(),
            location: "Menlo Park, CA".to_owned(),
        };

        // The type of `expected` is `serde_json::Value`
        let expected = json!({
            "fingerprint": "0xF9BA143B95FF6D82",
            "location": "Menlo Park, CA",
        });

        let v = serde_json::to_value(u).unwrap();
        assert_eq!(v, expected);

        Ok(())
    }

## Errors

This conversion can fail if `T`’s implementation of `Serialize` decides to fail, or if `T` contains a map with non-string keys.

    use std::collections::BTreeMap;

    fn main() {
        // The keys in this map are vectors, not strings.
        let mut map = BTreeMap::new();
        map.insert(vec![32, 64], "x86");

        println!("{}", serde_json::to_value(map).unwrap_err());
    }