Add GPU support for node graph

node-graph/gcore/src/lib.rs

@@ -1,4 +1,5 @@
 #![no_std]
+#![cfg_attr(target_arch = "spirv", feature(register_attr), register_attr(spirv))]
 
 pub mod generic;
 pub mod ops;
@@ -9,12 +10,13 @@ pub mod value;
 pub trait Node< 'n, Input> {
     type Output : 'n;
 
-    fn eval(&'n self, input: &'n Input) -> Self::Output;
+    fn eval(&'n self, input: Input) -> Self::Output;
 }
 
+// TODO: Fix exec trait
 pub trait Exec<'n>: Node<'n, ()> {
     fn exec(&'n self) -> Self::Output {
-        self.eval(&())
+        self.eval(())
     }
 }
 impl<'n, T: Node<'n, ()>> Exec<'n> for T {}
@@ -23,7 +25,9 @@ pub trait Cache {
     fn clear(&mut self);
 }
 
+#[cfg(not(feature = "gpu"))]
 extern crate alloc;
+#[cfg(not(feature = "gpu"))]
 impl<'n, I, O: 'n> Node<'n, I> for alloc::boxed::Box<dyn Node<'n, I, Output = O>> {
     type Output = O;