Refer to Triangle via new Handle

experiments/2024-12-09/src/geometry/operation.rs

@@ -8,6 +8,41 @@ pub trait Operation: fmt::Display {
     fn children(&self) -> Vec<HandleAny>;
 }
 
+#[derive(Debug, Eq, Ord, PartialEq, PartialOrd)]
+pub struct Handle<T> {
+    inner: Rc<T>,
+}
+
+impl<T> Handle<T> {
+    pub fn new(inner: T) -> Self {
+        Self {
+            inner: Rc::new(inner),
+        }
+    }
+
+    pub fn to_any(&self) -> HandleAny
+    where
+        T: Operation + 'static,
+    {
+        self.clone().into_any()
+    }
+
+    pub fn into_any(self) -> HandleAny
+    where
+        T: Operation + 'static,
+    {
+        HandleAny { inner: self.inner }
+    }
+}
+
+impl<T> Clone for Handle<T> {
+    fn clone(&self) -> Self {
+        Self {
+            inner: self.inner.clone(),
+        }
+    }
+}
+
 #[derive(Clone)]
 pub struct HandleAny {
     inner: Rc<dyn Operation>,

experiments/2024-12-09/src/geometry/shape.rs

@@ -2,7 +2,10 @@ use std::fmt;
 
 use tuples::CombinRight;
 
-use super::{operation::HandleAny, Operation, Triangle, Vertex};
+use super::{
+    operation::{Handle, HandleAny},
+    Operation, Triangle, Vertex,
+};
 
 #[derive(Default)]
 pub struct Shape {
@@ -33,11 +36,11 @@ impl Shape {
     pub fn triangle(
         &mut self,
         triangle: impl Into<Triangle>,
-    ) -> OperationResult<(Triangle,)> {
+    ) -> OperationResult<(Handle<Triangle>,)> {
-        let triangle = triangle.into();
+        let triangle = Handle::new(triangle.into());
 
         self.operations.push(OperationInSequence {
-            operation: HandleAny::new(triangle.clone()),
+            operation: triangle.to_any(),
             previous: self
                 .operations
                 .last()
@@ -138,7 +141,7 @@ impl<'r, T> OperationResult<'r, T> {
         triangle: impl Into<Triangle>,
     ) -> OperationResult<'r, T::Out>
     where
-        T: CombinRight<Triangle>,
+        T: CombinRight<Handle<Triangle>>,
     {
         let OperationResult {
             results: (triangle,),