From 61b2694a3a794af858c651eb7984fd575feea227 Mon Sep 17 00:00:00 2001
From: Alan Lawrence <alan.lawrence@cambridgequantum.com>
Date: Mon, 5 Feb 2024 14:43:31 +0000
Subject: [PATCH] ASCII art

---
 src/hugr/rewrite/inline_dfg.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/hugr/rewrite/inline_dfg.rs b/src/hugr/rewrite/inline_dfg.rs
index 967c90534..478d2dea1 100644
--- a/src/hugr/rewrite/inline_dfg.rs
+++ b/src/hugr/rewrite/inline_dfg.rs
@@ -332,6 +332,29 @@ mod test {
 
     #[test]
     fn order_edges() -> Result<(), Box<dyn std::error::Error>> {
+        /*      -----|-----|-----
+         *           |     |
+         *          H_a   H_b
+         *           |.    /         NB. Order edge H_a to nested DFG
+         *           | .  |
+         *           |  /-|--------\
+         *           |  | | .  Cst | NB. Order edge Input to LCst
+         *           |  | |  . |   |
+         *           |  | |   LCst |
+         *           |  |  \ /     |
+         *           |  |  RZ      |
+         *           |  |  |       |
+         *           |  |  meas    |
+         *           |  |  | \     |
+         *           |  |  |  if   |
+         *           |  |  |  .    | NB. State edge if to Output
+         *           |  \--|-------/
+         *           |  .  |
+         *           | .   |         NB. Order edge nested DFG to H_a2
+         *           H_a2  /
+         *             \  /
+         *              CX
+         */
         let delta = ExtensionSet::from_iter([float_types::EXTENSION_ID]);
         // Extension inference here relies on quantum ops not requiring their own test_quantum_extension
         let reg = ExtensionRegistry::try_new([