Fix #9381 (alias in namespace not replaced in method declaration) (#2232)

lib/tokenize.cpp

@@ -1855,6 +1855,7 @@ namespace {
         std::string newScope1 = scope1;
 
         // scopes didn't match so try higher scopes
+        index = newScope1.size();
         while (!newScope1.empty()) {
             std::string::size_type separator = newScope1.rfind(" :: ", index - 1);
             if (separator != std::string::npos)

test/testsimplifyusing.cpp

@@ -65,6 +65,7 @@ private:
         TEST_CASE(simplifyUsing9040);
         TEST_CASE(simplifyUsing9042);
         TEST_CASE(simplifyUsing9191);
+        TEST_CASE(simplifyUsing9381);
     }
 
     std::string tok(const char code[], bool simplify = true, Settings::PlatformType type = Settings::Native, bool debugwarnings = true) {
@@ -524,6 +525,30 @@ private:
         ASSERT_EQUALS(exp, tok(code, false));
     }
 
+    void simplifyUsing9381() {
+        const char code[] = "namespace ns {\n"
+                            "    class Result;\n"
+                            "    using UniqueResultPtr = std::unique_ptr<Result>;\n"
+                            "    class A {\n"
+                            "    public:\n"
+                            "        void func(UniqueResultPtr);\n"
+                            "    };\n"
+                            "    void A::func(UniqueResultPtr) {\n"
+                            "    }\n"
+                            "}";
+        const char exp[] = "namespace ns { "
+                           "class Result ; "
+                           "class A { "
+                           "public: "
+                           "void func ( std :: unique_ptr < Result > ) ; "
+                           "} ; "
+                           "void A :: func ( std :: unique_ptr < Result > ) { "
+                           "} "
+                           "}";
+
+        ASSERT_EQUALS(exp, tok(code, false));
+    }
+
 };
 
 REGISTER_TEST(TestSimplifyUsing)