Fix FN uninitMemberVar with std::array (#4935)

Author: chrchr-github

lib/checkclass.cpp

@@ -252,8 +252,17 @@ void CheckClass::constructors()
                 // Check if this is a class constructor
                 if (!var.isPointer() && !var.isPointerArray() && var.isClass() && func.type == Function::eConstructor) {
                     // Unknown type so assume it is initialized
-                    if (!var.type())
-                        continue;
+                    if (!var.type()) {
+                        if (var.isStlType() && var.valueType() && var.valueType()->containerTypeToken && var.getTypeName() == "std::array") {
+                            const Token* ctt = var.valueType()->containerTypeToken;
+                            if (!ctt->isStandardType() &&
+                                (!ctt->type() || ctt->type()->needInitialization != Type::NeedInitialization::True) &&
+                                !mSettings->library.podtype(ctt->str())) // TODO: handle complex type expression
+                                continue;
+                        }
+                        else
+                            continue;
+                    }
 
                     // Known type that doesn't need initialization or
                     // known type that has member variables of an unknown type

test/testconstructors.cpp

@@ -194,6 +194,7 @@ class TestConstructors : public TestFixture {
         TEST_CASE(uninitVarArray7);
         TEST_CASE(uninitVarArray8);
         TEST_CASE(uninitVarArray9); // ticket #6957, #6959
+        TEST_CASE(uninitVarArray10);
         TEST_CASE(uninitVarArray2D);
         TEST_CASE(uninitVarArray3D);
         TEST_CASE(uninitVarCpp11Init1);
@@ -3117,6 +3118,28 @@ class TestConstructors : public TestFixture {
         ASSERT_EQUALS("[test.cpp:6]: (warning) Member variable 'sRAIUnitDef::List' is not initialized in the constructor.\n", errout.str());
     }
 
+    void uninitVarArray10() { // #11650
+        Settings s(settings);
+        LOAD_LIB_2(s.library, "std.cfg");
+        check("struct T { int j; };\n"
+              "struct U { int k{}; };\n"
+              "struct S {\n"
+              "    std::array<int, 2> a;\n"
+              "    std::array<T, 2> b;\n"
+              "    std::array<std::size_t, 2> c;\n"
+              "    std::array<clock_t, 2> d;\n"
+              "    std::array<std::string, 2> e;\n"
+              "    std::array<U, 2> f;\n"
+              "S() {}\n"
+              "};\n", s);
+
+        ASSERT_EQUALS("[test.cpp:10]: (warning) Member variable 'S::a' is not initialized in the constructor.\n"
+                      "[test.cpp:10]: (warning) Member variable 'S::b' is not initialized in the constructor.\n"
+                      "[test.cpp:10]: (warning) Member variable 'S::c' is not initialized in the constructor.\n"
+                      "[test.cpp:10]: (warning) Member variable 'S::d' is not initialized in the constructor.\n",
+                      errout.str());
+    }
+
     void uninitVarArray2D() {
         check("class John\n"
               "{\n"