Don't force nodes to store references to other nodes

node-graph/gcore/src/lib.rs

@@ -1,18 +1,50 @@
 #![no_std]
 #![cfg_attr(target_arch = "spirv", feature(register_attr), register_attr(spirv))]
 
+#[cfg(feature = "async")]
+extern crate alloc;
+#[cfg(feature = "async")]
+use alloc::boxed::Box;
+#[cfg(feature = "async")]
+use async_trait::async_trait;
+
 pub mod generic;
 pub mod ops;
 //pub mod structural;
 pub mod value;
 
-#[rustfmt::skip]
 pub trait Node<'n> {
     type Output: 'n; // TODO: replace with generic associated type
 
     fn eval(&'n self) -> Self::Output;
 }
 
+impl<'n, N: Node<'n>> Node<'n> for &'n N {
+    type Output = N::Output;
+
+    fn eval(&'n self) -> Self::Output {
+        Node::eval(*self)
+    }
+}
+
+#[cfg(feature = "async")]
+#[async_trait]
+pub trait AsyncNode<'n> {
+    type Output: 'n; // TODO: replace with generic associated type
+
+    async fn eval(&'n self) -> Self::Output;
+}
+
+#[cfg(feature = "async")]
+#[async_trait]
+impl<'n, N: Node<'n> + Sync> AsyncNode<'n> for N {
+    type Output = N::Output;
+
+    async fn eval(&'n self) -> Self::Output {
+        Node::eval(self)
+    }
+}
+
 pub trait Cache {
     fn clear(&mut self);
 }