errmsg: Added 'assignment in if-condition'

src/checkfunctionusage.cpp

@@ -21,7 +21,6 @@
 #include "checkfunctionusage.h"
 #include "errormessage.h"
 #include "tokenize.h"
-#include <sstream>
 //---------------------------------------------------------------------------
 
 

src/checkother.cpp

@@ -377,9 +377,7 @@ void CheckOther::CheckIfAssignment()
             Token::Match(tok, "if ( %var% = %str% )") ||
             Token::Match(tok, "if ( %var% = %var% )"))
         {
-            std::ostringstream ostr;
-            ostr << _tokenizer->fileLine(tok) << ": Possible bug. Should it be '==' instead of '='?";
-            _errorLogger->reportErr(ostr.str());
+            _errorLogger->reportErr(ErrorMessage::ifAssignment(_tokenizer, tok));
         }
     }
 }

src/cppcheck.cpp

@@ -280,12 +280,9 @@ void CppCheck::checkFile(const std::string &code, const char FileName[])
     if (ErrorMessage::arrayIndexOutOfBounds(_settings) && ErrorMessage::bufferOverrun(_settings))
         checkBufferOverrun.bufferOverrun();
 
-    if (_settings._showAll)
-    {
-
     // Check for "if (a=b)"
+    if (ErrorMessage::ifAssignment(_settings))
         checkOther.CheckIfAssignment();
-    }
 
     // Dangerous functions, such as 'gets' and 'scanf'
     checkBufferOverrun.dangerousFunctions();

src/errormessage.h

@@ -309,5 +309,14 @@ public:
         return false;
     }
 
+    static std::string ifAssignment(const Tokenizer *tokenizer, const Token *Location)
+    {
+        return msg1(tokenizer, Location) + "Assignment in if-condition";
+    }
+    static bool ifAssignment(const Settings &s)
+    {
+        return s._checkCodingStyle;
+    }
+
 };
 #endif

tools/errmsg.cpp

@@ -92,6 +92,7 @@ int main()
     err.push_back(Message("charArrayIndex", Message::style, "Warning - using char variable as array index"));
     err.push_back(Message("charBitOp", Message::style, "Warning - using char variable in bit operation"));
     err.push_back(Message("variableScope", Message::never, "The scope of the variable %1 can be limited", "varname"));
+    err.push_back(Message("ifAssignment", Message::style, "Assignment in if-condition"));
 
     // Generate code..
     std::cout << "Generate code.." << std::endl;