Unused struct members: bail out upon casting

src/checkother.cpp

@@ -619,6 +619,11 @@ void CheckOther::checkStructMemberUsage()
                 if (tok2->str() == "}")
                     break;
             }
+
+            // Bail out if some data is casted to struct..
+            const std::string s("( struct " + tok->next()->str() + " * ) & %var% [");
+            if (Token::findmatch(tok, s.c_str()))
+                structname = 0;
         }
 
         if (tok->str() == "}")

src/checkother.h

@@ -54,6 +54,7 @@ public:
             checkOther.checkUnsignedDivision();
             checkOther.checkCharVariable();
             checkOther.checkVariableScope();
+            checkOther.checkStructMemberUsage();
         }
     }
 
@@ -65,7 +66,6 @@ public:
         {
             checkOther.warningRedundantCode();
             checkOther.checkConstantFunctionParameter();
-            checkOther.checkStructMemberUsage();
             checkOther.checkIncompleteStatement();
             if (settings->_showAll)
             {

test/testunusedvar.cpp

@@ -40,7 +40,6 @@ private:
         Tokenizer tokenizer;
         std::istringstream istr(code);
         tokenizer.tokenize(istr, "test.cpp");
-        tokenizer.simplifyTokenList();
 
         // Clear the error buffer..
         errout.str("");
@@ -58,6 +57,7 @@ private:
         TEST_CASE(structmember3);
         TEST_CASE(structmember4);
         TEST_CASE(structmember5);
+        TEST_CASE(structmember6);
     }
 
     void structmember1()
@@ -149,6 +149,22 @@ private:
               "}\n");
         ASSERT_EQUALS("", errout.str());
     }
+
+
+    void structmember6()
+    {
+        check("struct AB\n"
+              "{\n"
+              "    int a;\n"
+              "    int b;\n"
+              "};\n"
+              "\n"
+              "void foo(char *buf)\n"
+              "{\n"
+              "    struct AB *ab = (struct AB *)&buf[10];\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
+    }
 };
 
 REGISTER_TEST(TestUnusedVar)