From a3ac6e71cbc922b7c941c45f23ee18a9fc274d1f Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Wed, 11 Jan 2023 15:33:28 -0800
Subject: Make backward differentiation work with generics. (#2586)

* Make backward differentiation work with generics.

* Fix.

* Another fix.

* More fix.

Co-authored-by: Yong He <yhe@nvidia.com>
---
 source/slang/slang-check-expr.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'source/slang/slang-check-expr.cpp')

diff --git a/source/slang/slang-check-expr.cpp b/source/slang/slang-check-expr.cpp
index 1ffc45fbd..2fc18628e 100644
--- a/source/slang/slang-check-expr.cpp
+++ b/source/slang/slang-check-expr.cpp
@@ -2129,7 +2129,7 @@ namespace Slang
                 {
                     derivType = outType->getValueType();
                 }
-                else if (!as<PtrTypeBase>(derivType))
+                else if (as<DifferentialPairType>(derivType))
                 {
                     derivType = m_astBuilder->getInOutType(derivType);
                 }
-- 
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