Try and fail to make nodes object-safe in node graph

node-graph/gstd/src/value.rs

@@ -1,38 +0,0 @@
-use std::borrow::Borrow;
-
-use graphene_core::Node;
-
-pub struct IntNode<const N: u32>;
-impl<const N: u32> Node for IntNode<N> {
-    type Output<'a> = u32;
-    type Input<'a> = ();
-    fn eval<'a, I: Borrow<Self::Input<'a>>>(&self, _input: I) -> u32 {
-        N
-    }
-}
-
-#[derive(Default)]
-pub struct ValueNode<T>(T);
-impl<T> Node for ValueNode<T> {
-    type Output<'o> = &'o T where T: 'o;
-    type Input<'i> = () where T: 'i;
-    fn eval<'a, I: Borrow<Self::Input<'a>>>(&'a self, _input: I) -> &T {
-        &self.0
-    }
-}
-
-#[rustfmt::skip]
-pub trait OutputNode<'a, T>: Node<Output<'a> = T> where Self: 'a {}
-impl<T: std::default::Default> DefaultNode for T {}
-
-impl<T> ValueNode<T> {
-    pub fn new(value: T) -> ValueNode<T> {
-        ValueNode(value)
-    }
-}
-
-pub trait DefaultNode: Default {
-    fn default_node() -> ValueNode<Self> {
-        ValueNode::new(Self::default())
-    }
-}