fix(Rust): Box optional properties

Using a `Box` for optional properties reduces the stack size of structs substantially.
stencila · Jun 6, 2021 · be279c0 · be279c0
1 parent 9a650d1
commit be279c0
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diff --git a/rust/src/prelude.rs b/rust/src/prelude.rs
@@ -80,7 +80,10 @@ macro_rules! impl_struct {
             }
 
             fn id(&self) -> Option<String> {
-                self.id.clone()
+                match &self.id {
+                    None => None,
+                    Some(id) => Some(*id.clone()),
+                }
             }
         }
     };