Macro apply 

macro_rules! apply {
    ($current:expr, $patch_json:expr) => { ... };
}

Applies a JSON Merge Patch (RFC 7396).

Consumes the current value and returns the updated value.

Example

use serde_patch::apply;

#[derive(serde::Serialize, serde::Deserialize, PartialEq, Debug)]
struct User { id: u32, name: String }

let current = User { id: 1, name: "old".to_string() };
let patch = r#"{ "name": "new" }"#;

let updated = apply!(current, patch).unwrap();
assert_eq!(updated.name, "new");
assert_eq!(updated.id, 1);