errmsg: Added 'unused struct member'

src/checkother.cpp

@@ -700,9 +700,7 @@ void CheckOther::CheckStructMemberUsage()
 
             if (! used)
             {
-                std::ostringstream errmsg;
-                errmsg << _tokenizer->fileLine(tok->next()) << ": struct or union member '" << structname << "::" << varname << "' is never used";
-                _errorLogger->reportErr(errmsg.str());
+                _errorLogger->reportErr(ErrorMessage::unusedStructMember(_tokenizer, tok->next(), structname, varname));
             }
         }
     }

src/cppcheck.cpp

@@ -319,6 +319,10 @@ void CppCheck::checkFile(const std::string &code, const char FileName[])
     if (ErrorMessage::ifNoAction(_settings))
         checkOther.WarningIf();
 
+    // Unused struct members..
+    if (ErrorMessage::unusedStructMember(_settings))
+        checkOther.CheckStructMemberUsage();
+
 
     if (_settings._checkCodingStyle)
     {
@@ -328,9 +332,6 @@ void CppCheck::checkFile(const std::string &code, const char FileName[])
         // Check if a constant function parameter is passed by value
         checkOther.CheckConstantFunctionParameter();
 
-        // Unused struct members..
-        checkOther.CheckStructMemberUsage();
-
         // Check for various types of incomplete statements that could for example
         // mean that an ';' has been added by accident
         checkOther.CheckIncompleteStatement();

src/errormessage.h

@@ -219,5 +219,14 @@ public:
         return s._showAll & s._checkCodingStyle;
     }
 
+    static std::string unusedStructMember(const Tokenizer *tokenizer, const Token *Location, const std::string &structname, const std::string &varname)
+    {
+        return msg1(tokenizer, Location) + "struct or union member '" + structname + "::" + varname + "' is never used";
+    }
+    static bool unusedStructMember(const Settings &s)
+    {
+        return s._checkCodingStyle;
+    }
+
 };
 #endif

tools/errmsg.cpp

@@ -83,6 +83,7 @@ int main()
     err.push_back(Message("sprintfOverlappingData", 0, "Overlapping data buffer %1", "varname"));
     err.push_back(Message("udivError", 0, "Unsigned division. The result will be wrong."));
     err.push_back(Message("udivWarning", Message::STYLE | Message::ALL, "Warning: Division with signed and unsigned operators"));
+    err.push_back(Message("unusedStructMember", Message::STYLE, "struct or union member '%1::%2' is never used", "structname", "varname"));
 
     // Generate code..
     std::cout << "Generate code.." << std::endl;