From 2ff94f5308bfc0b61391ce45b4fd8d0dcdbfde26 Mon Sep 17 00:00:00 2001
From: Matthew Treinish <mtreinish@kortar.org>
Date: Mon, 9 Sep 2024 07:10:47 -0400
Subject: [PATCH] Use Fn trait instead of FnMut for callback

We don't need the callback to be mutable currently so relax the trait to
just be `Fn` instead of `FnMut`. If we have a need for a mutable
environment callback in the future we can change this easily enough
without any issues.
---
 crates/circuit/src/dag_circuit.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/crates/circuit/src/dag_circuit.rs b/crates/circuit/src/dag_circuit.rs
index 072ac4b2e074..766fae7b528a 100644
--- a/crates/circuit/src/dag_circuit.rs
+++ b/crates/circuit/src/dag_circuit.rs
@@ -6292,10 +6292,10 @@ impl DAGCircuit {
         &mut self,
         py: Python, // Unused if cache_pygates isn't enabled
         node: NodeIndex,
-        mut insert: F,
+        insert: F,
     ) -> PyResult<()>
     where
-        F: FnMut(&Wire) -> PyResult<OperationFromPython>,
+        F: Fn(&Wire) -> PyResult<OperationFromPython>,
     {
         let edges: Vec<(NodeIndex, EdgeIndex, Wire)> = self
             .dag