From 2b0a1d92dda37fb80420e80d1d3933d9287be21f Mon Sep 17 00:00:00 2001
From: Eric Traut <eric@traut.com>
Date: Mon, 10 Jun 2024 19:39:33 -0700
Subject: [PATCH] Simplified FunctionType.cloneForSpecialization method.

---
 packages/pyright-internal/src/analyzer/types.ts | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/packages/pyright-internal/src/analyzer/types.ts b/packages/pyright-internal/src/analyzer/types.ts
index 337151c2c..dcb989825 100644
--- a/packages/pyright-internal/src/analyzer/types.ts
+++ b/packages/pyright-internal/src/analyzer/types.ts
@@ -1689,25 +1689,15 @@ export namespace FunctionType {
         specializedTypes: SpecializedFunctionTypes,
         specializedInferredReturnType: Type | undefined
     ): FunctionType {
-        const newFunction = create(
-            type.details.name,
-            type.details.fullName,
-            type.details.moduleName,
-            type.details.flags,
-            type.flags,
-            type.details.docString
-        );
-        newFunction.details = type.details;
+        const newFunction = TypeBase.cloneType(type);
 
         assert(specializedTypes.parameterTypes.length === type.details.parameters.length);
         if (specializedTypes.parameterDefaultArgs) {
             assert(specializedTypes.parameterDefaultArgs.length === type.details.parameters.length);
         }
-        newFunction.specializedTypes = specializedTypes;
 
-        if (specializedInferredReturnType) {
-            newFunction.inferredReturnType = specializedInferredReturnType;
-        }
+        newFunction.specializedTypes = specializedTypes;
+        newFunction.inferredReturnType = specializedInferredReturnType;
 
         return newFunction;
     }