doc: add LazyValue convert to serde_json::Value examples

src/lazyvalue/value.rs

@@ -66,6 +66,51 @@ use crate::{
 /// let data: TestLazyValue = sonic_rs::from_str(input).unwrap();
 /// assert_eq!(data.borrowed_lv.as_raw_str(), "\"hello\"");
 /// ```
+///
+/// # Convert to serde_json::Value
+///
+/// `LazyValue<'a>` can convert into `serde_json::Value` from bytes slice.
+///
+/// ```
+/// use sonic_rs::{pointer, JsonValueTrait};
+///
+/// let json: &str = r#"{
+/// "bool": true,
+/// "int": -1,
+/// "uint": 0,
+/// "float": 1.1,
+/// "string": "hello",
+/// "string_escape": "\"hello\"",
+/// "array": [1,2,3],
+/// "object": {"a":"aaa"},
+/// "strempty": "",
+/// "objempty": {},
+/// "arrempty": []
+/// }"#;
+/// let lazy_value = sonic_rs::get(json, pointer![].iter()).unwrap();
+///
+/// for (key, expect_value) in [
+/// ("bool", serde_json::json!(true)),
+/// ("int", serde_json::json!(-1)),
+/// ("uint", serde_json::json!(0)),
+/// ("float", serde_json::json!(1.1)),
+/// ("string", serde_json::json!("hello")),
+/// ("string_escape", serde_json::json!("\"hello\"")),
+/// ("array", serde_json::json!([1, 2, 3])),
+/// ("object", serde_json::json!({"a":"aaa"})),
+/// ("strempty", serde_json::json!("")),
+/// ("objempty", serde_json::json!({})),
+/// ("arrempty", serde_json::json!([])),
+/// ] {
+/// let value = lazy_value.get(key);
+///
+/// let trans_value =
+/// serde_json::from_slice::<serde_json::Value>(value.unwrap().as_raw_str().as_bytes())
+/// .unwrap();
+/// assert_eq!(trans_value, expect_value);
+/// println!("checked {key} with {trans_value:?}");
+/// }
+/// ```
 pub struct LazyValue<'a> {
  // the raw slice from origin json
  pub(crate) raw: JsonSlice<'a>,