From bf67309454032b4f92d0bc9735b608e56b16882f Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Tue, 8 Nov 2022 10:07:57 -0800
Subject: Make `__BuiltinFloatingPointType` conform to `IDifferentiable`.
 (#2499)

---
 source/slang/slang-check-overload.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

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

diff --git a/source/slang/slang-check-overload.cpp b/source/slang/slang-check-overload.cpp
index 42fab94a6..38754d170 100644
--- a/source/slang/slang-check-overload.cpp
+++ b/source/slang/slang-check-overload.cpp
@@ -1573,10 +1573,15 @@ namespace Slang
                 {
                     for (auto item : overloadExpr->lookupResult2.items)
                     {
+                        auto funcType = as<FuncType>(GetTypeForDeclRef(item.declRef, item.declRef.decl->loc));
+                        if (!funcType)
+                            continue;
+                        funcType = as<FuncType>(processJVPFuncType(funcType));
+                        if (!funcType)
+                            continue;
                         OverloadCandidate candidate;
                         candidate.flavor = OverloadCandidate::Flavor::Expr;
-                        candidate.funcType = as<FuncType>(processJVPFuncType(
-                            as<FuncType>(GetTypeForDeclRef(item.declRef, item.declRef.decl->loc))));
+                        candidate.funcType = funcType;
                         candidate.resultType = candidate.funcType->getResultType();
                         candidate.item = LookupResultItem(item.declRef);
 
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