simplify known value: insert known variable value into calculations

src/cppcheck.cpp

@@ -37,6 +37,7 @@
 #include <cstring>
 #include <fstream>
 #include <map>
+#include <iomanip>
 
 //---------------------------------------------------------------------------
 
@@ -333,6 +334,9 @@ void CppCheck::checkFile(const std::string &code, const char FileName[])
 
     _tokenizer.simplifyTokenList();
 
+    // Write simplified token list to a file..
+    std::cout << _tokenizer.tokens()->stringifyList(true) << std::endl;
+
     if (_settings._unusedFunctions)
         _checkFunctionUsage.parseTokens(_tokenizer);
 

src/tokenize.cpp

@@ -1570,6 +1570,14 @@ bool Tokenizer::simplifyKnownVariables()
                         tok3->str(tok2->strAt(2));
                         ret = true;
                     }
+
+                    // Variable is used in calculation..
+                    if (Token::Match(tok3, "[=+-*/] %varid% [+-*/;]", varid))
+                    {
+                        tok3 = tok3->next();
+                        tok3->str(tok2->strAt(2));
+                        ret = true;
+                    }
                 }
             }
         }