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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add proc-macros for DeepClone and ByteRepr","articleBody":"Currently we generate:\n\n```rs\n#[derive(Default)]\npub struct woff2_Point {\n    pub x: Value\u003ci32\u003e,\n    pub y: Value\u003ci32\u003e,\n    pub on_curve: Value\u003cbool\u003e,\n}\nimpl Clone for woff2_Point {\n    fn clone(\u0026self) -\u003e Self {\n        let mut this = Self {\n            x: Rc::new(RefCell::new((*self.x.borrow()))),\n            y: Rc::new(RefCell::new((*self.y.borrow()))),\n            on_curve: Rc::new(RefCell::new((*self.on_curve.borrow()))),\n        };\n        this\n    }\n}\nimpl ByteRepr for woff2_Point {\n    fn to_bytes(\u0026self, buf: \u0026mut [u8]) {\n        (*self.x.borrow()).to_bytes(\u0026mut buf[0..4]);\n        (*self.y.borrow()).to_bytes(\u0026mut buf[4..8]);\n        (*self.on_curve.borrow()).to_bytes(\u0026mut buf[8..9]);\n    }\n    fn from_bytes(buf: \u0026[u8]) -\u003e Self {\n        Self {\n            x: Rc::new(RefCell::new(\u003ci32\u003e::from_bytes(\u0026buf[0..4]))),\n            y: Rc::new(RefCell::new(\u003ci32\u003e::from_bytes(\u0026buf[4..8]))),\n            on_curve: Rc::new(RefCell::new(\u003cbool\u003e::from_bytes(\u0026buf[8..9]))),\n        }\n    }\n}\n```\n\nThat's a lot of code. We can write 2 proc-macros: `DeepClone` and `ByteRepr` and generate the following code instead:\n\n```rs\n#[derive(Default, DeepClone, ByteRepr)]\npub struct woff2_Point {\n    pub x: Value\u003ci32\u003e,\n    pub y: Value\u003ci32\u003e,\n    pub on_curve: Value\u003cbool\u003e,\n}\n```","author":{"url":"https://github.com/lucic71","@type":"Person","name":"lucic71"},"datePublished":"2026-07-01T09:26:03.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/216/cpp2rust/issues/216"}