Clang: Fix parse errors in clazy/tidy demo project

...otherwise not all intended diagnostics can be demonstrated.

Change-Id: I2f69862cc6c8a2e58059d9075ad6fd7c7e72b4a5
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

share/qtcreator/cplusplus/examples/clazy_example.cpp

@@ -42,7 +42,7 @@ class TestObject : public QObject
 
 public:
     TestObject();
-    TestObject(const TestObject& other);
+    TestObject(const TestObject& other) {}
 
     bool event(QEvent *event) override
     {
@@ -51,7 +51,7 @@ public:
     }
 
 public slots:
-    void someSlot();
+    void someSlot() {}
 
     // -Wclazy-function-args-by-value
     void someOtherSlot(const QPoint &point)
@@ -136,3 +136,6 @@ TestObject::TestObject()
     // -Wclazy-qstring-arg
     QString("%1 %2").arg("1").arg("2");
 }
+
+// Note: A fatal error like an unresolved include will make clazy stop emitting any diagnostics.
+// #include "clazy_example.moc"

share/qtcreator/cplusplus/examples/tidy_example.cpp

@@ -29,6 +29,8 @@
 #include <algorithm>
 #include <cstdlib>
 #include <vector>
+#include <cstring>
+#include <csetjmp>
 
 #include "tidy_example.h"
 
@@ -57,11 +59,11 @@ nb::A a;
 class Base
 {
 public:
-    Base();
+    Base() {}
 
     // google-explicit-constructor
-    Base(int arg);
-    virtual ~Base();
+    Base(int arg) {}
+    virtual ~Base() = default;
     Base(const Base &) = default;
     Base(Base &&) = default;
 
@@ -175,7 +177,7 @@ public:
         }
 
         // cppcoreguidelines-pro-type-reinterpret-cast
-        return a + c + reinterpret_cast<int>(&val);
+        return a + c + reinterpret_cast<int64_t>(&val);
     }
 };