From ed1776eb59b586969fa336dea60cca519d19a3e6 Mon Sep 17 00:00:00 2001
From: Markus Hauru <mhauru@turing.ac.uk>
Date: Thu, 12 Sep 2024 10:19:21 +0100
Subject: [PATCH] Expand Enzyme extension comment

---
 ext/DynamicPPLEnzymeCoreExt.jl | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ext/DynamicPPLEnzymeCoreExt.jl b/ext/DynamicPPLEnzymeCoreExt.jl
index 20e325fcd..ceb3f4981 100644
--- a/ext/DynamicPPLEnzymeCoreExt.jl
+++ b/ext/DynamicPPLEnzymeCoreExt.jl
@@ -10,7 +10,9 @@ end
 
 @inline EnzymeCore.EnzymeRules.inactive_type(::Type{<:DynamicPPL.SamplingContext}) = true
 
-# Mark istrans as having 0 derivative
-@inline EnzymeCore.EnzymeRules.inactive_noinl(::typeof(DynamicPPL.istrans), args...) = nothing
+# Mark istrans as having 0 derivative. The `nothing` return value is not significant, Enzyme
+# only checks whether such a method exists, and never runs it.
+@inline EnzymeCore.EnzymeRules.inactive_noinl(::typeof(DynamicPPL.istrans), args...) =
+    nothing
 
 end