From 94640e9efe49e062ceb544941a47293f41ffff0c Mon Sep 17 00:00:00 2001
From: Simon Cruanes <simon.cruanes.2007@m4x.org>
Date: Fri, 31 Mar 2023 22:42:18 -0400
Subject: [PATCH] comment

---
 src/pp/containers_pp.ml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/pp/containers_pp.ml b/src/pp/containers_pp.ml
index 36a78bbc..5b8a68ed 100644
--- a/src/pp/containers_pp.ml
+++ b/src/pp/containers_pp.ml
@@ -287,7 +287,9 @@ module Pretty = struct
     Buffer.contents buf
 
   let to_format ~width out self : unit =
-    (* TODO: more efficient implementation based on out *)
+    (* TODO: more efficient implementation based on:
+      open a vbox; make custom out that directly emit Format.pp_foo calls;
+      render to this out. *)
     CCFormat.string_lines out (to_string ~width self)
 end