From 1343ab79fcd0ff9e5ffebbcf95414e51ab19e9cd Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 25 Jul 2024 11:49:07 -0700
Subject: Fix around extensions and `IDifferentiable` requirement synthesis. 
 (#4729)

* Check extensions before function parameters.
Fix decl ref formation for synthesized differentiable requirements that are inside an extension.

* Fix clang errors.

* More clang fix.

* Fix warnings.

* Fix build error.

* Fix.

* Fix typo.
---
 source/slang/slang-ast-type.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'source/slang/slang-ast-type.cpp')

diff --git a/source/slang/slang-ast-type.cpp b/source/slang/slang-ast-type.cpp
index 2dc746e09..47cd68b9e 100644
--- a/source/slang/slang-ast-type.cpp
+++ b/source/slang/slang-ast-type.cpp
@@ -559,7 +559,7 @@ DeclRef<ThisTypeDecl> ExtractExistentialType::getThisTypeDeclRef()
         }
     SLANG_ASSERT(thisTypeDecl);
 
-    DeclRef<ThisTypeDecl> specialiedInterfaceDeclRef = getCurrentASTBuilder()->getLookupDeclRef(openedWitness, thisTypeDecl);
+    DeclRef<ThisTypeDecl> specialiedInterfaceDeclRef = getCurrentASTBuilder()->getLookupDeclRef(openedWitness, thisTypeDecl).as<ThisTypeDecl>();
 
     this->cachedThisTypeDeclRef = specialiedInterfaceDeclRef;
     return specialiedInterfaceDeclRef;
-- 
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