Fixed #4302 (Member variable not initialized in public delegate constructor)

lib/checkclass.cpp

@@ -469,7 +469,34 @@ void CheckClass::initializeVarList(const Function &func, std::list<const Functio
                     }
                 }
             } else if (level == 0 && Token::Match(ftok, "%var% {") && ftok->str() != "const" && Token::Match(ftok->next()->link()->next(), "%type%|,|{")) {
-                initVar(ftok->str(), scope, usage);
+                if (ftok->str() != func.name()) {
+                    initVar(ftok->str(), scope, usage);
+                } else { // c++11 delegate constructor
+                    const Function *member = scope->findFunction(ftok);
+                    // member function found
+                    if (member) {
+                        // recursive call
+                        // assume that all variables are initialized
+                        if (std::find(callstack.begin(), callstack.end(), member) != callstack.end()) {
+                            /** @todo false negative: just bail */
+                            assignAllVar(usage);
+                            return;
+                        }
+
+                        // member function has implementation
+                        if (member->hasBody) {
+                            // initialize variable use list using member function
+                            callstack.push_back(member);
+                            initializeVarList(*member, callstack, scope, usage);
+                            callstack.pop_back();
+                        }
+
+                        // there is a called member function, but it has no implementation, so we assume it initializes everything
+                        else {
+                            assignAllVar(usage);
+                        }
+                    }
+                }
                 ftok = ftok->linkAt(1);
             } else if (level != 0 && Token::Match(ftok, "%var% =")) // assignment in the initializer: var(value = x)
                 assignVar(ftok->str(), scope, usage);

lib/symboldatabase.cpp

@@ -2500,11 +2500,12 @@ const Function* Scope::findFunction(const Token *tok) const
     for (std::list<Function>::const_iterator i = functionList.begin(); i != functionList.end(); ++i) {
         if (i->tokenDef->str() == tok->str()) {
             const Function *func = &*i;
-            if (tok->strAt(1) == "(" && tok->tokAt(2)) {
+            if ((tok->strAt(1) == "(" || (func->name() == tok->str() && tok->strAt(1) == "{" && func->type == Function::eConstructor)) && tok->tokAt(2)) {
+                std::string end(tok->strAt(1) == "{" ? "}" : ")");
                 // check the arguments
                 unsigned int args = 0;
                 const Token *arg = tok->tokAt(2);
-                while (arg && arg->str() != ")") {
+                while (arg && arg->str() != end) {
                     /** @todo check argument type for match */
 
                     // mismatch parameter: passing parameter by address to function, argument is reference

test/testconstructors.cpp

@@ -832,6 +832,40 @@ private:
               "    A() { number = 42; }\n"
               "};");
         ASSERT_EQUALS("", errout.str());
+
+        check("class A {\n"
+              "    int number;\n"
+              "public:\n"
+              "    A(int n) { }\n"
+              "    A() : A{42} {}\n"
+              "};");
+        ASSERT_EQUALS("[test.cpp:4]: (warning) Member variable 'A::number' is not initialized in the constructor.\n"
+                      "[test.cpp:5]: (warning) Member variable 'A::number' is not initialized in the constructor.\n", errout.str());
+
+        check("class A {\n"
+              "    int number;\n"
+              "public:\n"
+              "    A(int n) { number = n; }\n"
+              "    A() : A{42} {}\n"
+              "};");
+        ASSERT_EQUALS("", errout.str());
+
+        check("class A {\n"
+              "    int number;\n"
+              "public:\n"
+              "    A(int n) : A{} { }\n"
+              "    A() {}\n"
+              "};", true);
+        ASSERT_EQUALS("[test.cpp:4]: (warning) Member variable 'A::number' is not initialized in the constructor.\n"
+                      "[test.cpp:5]: (warning, inconclusive) Member variable 'A::number' is not initialized in the constructor.\n", errout.str());
+
+        check("class A {\n"
+              "    int number;\n"
+              "public:\n"
+              "    A(int n) : A{} { }\n"
+              "    A() { number = 42; }\n"
+              "};");
+        ASSERT_EQUALS("", errout.str());
     }