From 5d9fa7651013305bfcc73c57441fa77b0ca1d4b4 Mon Sep 17 00:00:00 2001
From: Justin Lovinger <git@justinlovinger.com>
Date: Mon, 21 Oct 2024 19:53:00 +0000
Subject: [PATCH] optimal-compute-core: fix blanket-implementation of
 `ComputationFn` for `Box`

---
 optimal-compute-core/src/lib.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/optimal-compute-core/src/lib.rs b/optimal-compute-core/src/lib.rs
index 371b07a..44196d9 100644
--- a/optimal-compute-core/src/lib.rs
+++ b/optimal-compute-core/src/lib.rs
@@ -475,11 +475,21 @@ where
 ///
 /// Most computations should implement this,
 /// even if they represent a function with zero arguments.
-#[blanket(derive(Ref, Mut, Box, Rc, Arc, Cow))]
+#[blanket(derive(Ref, Mut, Rc, Arc, Cow))]
 pub trait ComputationFn: Computation {
     fn args(&self) -> Args;
 }
 
+// `blanket` version `0.4.0` derives this without `?Sized`.
+impl<T> ComputationFn for Box<T>
+where
+    T: ComputationFn + ?Sized,
+{
+    fn args(&self) -> Args {
+        (*(*self)).args()
+    }
+}
+
 #[derive(Clone, Copy, Debug)]
 pub struct Val<Dim, A>
 where