Fixed #2465 (False positive: not initialised variable, but there is default constructor for it.)

lib/symboldatabase.cpp

@@ -411,12 +411,18 @@ SymbolDatabase::SymbolDatabase(const Tokenizer *tokenizer, const Settings *setti
                     if (func->type == SymbolDatabase::Func::Constructor)
                     {
                         // check for no arguments: func ( )
-                        /** @todo check for arguments with default values someday */
                         if (func->argDef->next() == func->argDef->link())
                         {
                             hasDefaultConstructor = true;
                             break;
                         }
+
+                        /** check for arguments with default values */
+                        else if (func->argCount() == func->initializedArgCount())
+                        {
+                            hasDefaultConstructor = true;
+                            break;
+                        }
                     }
                 }
 
@@ -908,6 +914,43 @@ const Token *SymbolDatabase::initBaseInfo(SpaceInfo *info, const Token *tok)
 
     return tok2;
 }
+
+//---------------------------------------------------------------------------
+
+unsigned int SymbolDatabase::Func::argCount() const
+{
+    unsigned int count = 0;
+
+    if (argDef->link() != argDef->next())
+    {
+        count++;
+
+        for (const Token *tok = argDef->next(); tok && tok->next() && tok->next() != argDef->link(); tok = tok->next())
+        {
+            if (tok->str() == ",")
+                count++;
+        }
+    }
+
+    return count;
+}
+
+unsigned int SymbolDatabase::Func::initializedArgCount() const
+{
+    unsigned int count = 0;
+
+    if (argDef->link() != argDef->next())
+    {
+        for (const Token *tok = argDef->next(); tok && tok->next() && tok->next() != argDef->link(); tok = tok->next())
+        {
+            if (tok->str() == "=")
+                count++;
+        }
+    }
+
+    return count;
+}
+
 //---------------------------------------------------------------------------
 
 SymbolDatabase::SpaceInfo::SpaceInfo(SymbolDatabase *check_, const Token *classDef_, SymbolDatabase::SpaceInfo *nestedIn_) :

lib/symboldatabase.h

@@ -117,6 +117,9 @@ public:
         {
         }
 
+        unsigned int argCount() const;
+        unsigned int initializedArgCount() const;
+
         const Token *tokenDef; // function name token in class definition
         const Token *argDef;   // function argument start '(' in class definition
         const Token *token;    // function name token in implementation

test/testclass.cpp

@@ -61,6 +61,7 @@ private:
         TEST_CASE(uninitVar15);
         TEST_CASE(uninitVar16);
         TEST_CASE(uninitVar17);
+        TEST_CASE(uninitVar18); // ticket #2465
         TEST_CASE(uninitVarEnum);
         TEST_CASE(uninitVarStream);
         TEST_CASE(uninitVarTypedef);
@@ -2026,6 +2027,37 @@ private:
         ASSERT_EQUALS("[test.cpp:9]: (warning) Member variable 'Bar::foo' is not initialised in the constructor.\n", errout.str());
     }
 
+    void uninitVar18() // ticket #2465
+    {
+        checkUninitVar("struct Altren\n"
+                       "{\n"
+                       "    Altren(int _a = 0) : value(0) { }\n"
+                       "    int value;\n"
+                       "};\n"
+                       "class A\n"
+                       "{\n"
+                       "public:\n"
+                       "    A() { }\n"
+                       "private:\n"
+                       "    Altren value;\n"
+                       "};\n");
+        ASSERT_EQUALS("", errout.str());
+
+        checkUninitVar("struct Altren\n"
+                       "{\n"
+                       "    Altren(int _a) : value(0) { }\n"
+                       "    int value;\n"
+                       "};\n"
+                       "class A\n"
+                       "{\n"
+                       "public:\n"
+                       "    A() { }\n"
+                       "private:\n"
+                       "    Altren value;\n"
+                       "};\n");
+        ASSERT_EQUALS("[test.cpp:9]: (warning) Member variable 'A::value' is not initialised in the constructor.\n", errout.str());
+    }
+
     void uninitVarArray1()
     {
         checkUninitVar("class John\n"