6 files changed, 18 insertions, 16 deletions
diff --git a/src/corelib/statemachine/qabstractstate.cpp b/src/corelib/statemachine/qabstractstate.cpp
index 1a9ad4601d..0db44bc427 100644
--- a/src/corelib/statemachine/qabstractstate.cpp
+++ b/src/corelib/statemachine/qabstractstate.cpp
@@ -155,7 +155,8 @@ QAbstractState::~QAbstractState()
 }
 
 /*!
-  Returns this state's parent state, or 0 if the state has no parent state.
+  Returns this state's parent state, or \nullptr if the state has no
+  parent state.
 */
 QState *QAbstractState::parentState() const
 {
@@ -166,8 +167,8 @@ QState *QAbstractState::parentState() const
 }
 
 /*!
-  Returns the state machine that this state is part of, or 0 if the state is
-  not part of a state machine.
+  Returns the state machine that this state is part of, or \nullptr if
+  the state is not part of a state machine.
 */
 QStateMachine *QAbstractState::machine() const
 {
diff --git a/src/corelib/statemachine/qabstracttransition.cpp b/src/corelib/statemachine/qabstracttransition.cpp
index ebf33e120a..d841fd3c8b 100644
--- a/src/corelib/statemachine/qabstracttransition.cpp
+++ b/src/corelib/statemachine/qabstracttransition.cpp
@@ -195,8 +195,8 @@ QAbstractTransition::~QAbstractTransition()
 }
 
 /*!
-  Returns the source state of this transition, or 0 if this transition has no
-  source state.
+  Returns the source state of this transition, or \nullptr if this
+  transition has no source state.
 */
 QState *QAbstractTransition::sourceState() const
 {
@@ -205,14 +205,14 @@ QState *QAbstractTransition::sourceState() const
 }
 
 /*!
-  Returns the target state of this transition, or 0 if the transition has no
-  target.
+  Returns the target state of this transition, or \nullptr if the
+  transition has no target.
 */
 QAbstractState *QAbstractTransition::targetState() const
 {
     Q_D(const QAbstractTransition);
     if (d->targetStates.isEmpty())
-        return 0;
+        return nullptr;
     return d->targetStates.first().data();
 }
 
@@ -325,8 +325,8 @@ void QAbstractTransition::setTransitionType(TransitionType type)
 }
 
 /*!
-  Returns the state machine that this transition is part of, or 0 if the
-  transition is not part of a state machine.
+  Returns the state machine that this transition is part of, or
+  \nullptr if the transition is not part of a state machine.
 */
 QStateMachine *QAbstractTransition::machine() const
 {
diff --git a/src/corelib/statemachine/qsignaleventgenerator_p.h b/src/corelib/statemachine/qsignaleventgenerator_p.h
index 271f6317bd..72592b8731 100644
--- a/src/corelib/statemachine/qsignaleventgenerator_p.h
+++ b/src/corelib/statemachine/qsignaleventgenerator_p.h
@@ -71,7 +71,7 @@ private:
     void execute(void **_a);
 
 private:
-    Q_DISABLE_COPY(QSignalEventGenerator)
+    Q_DISABLE_COPY_MOVE(QSignalEventGenerator)
 };
 
 QT_END_NAMESPACE
diff --git a/src/corelib/statemachine/qsignaltransition_p.h b/src/corelib/statemachine/qsignaltransition_p.h
index 0666e600a4..b3de334677 100644
--- a/src/corelib/statemachine/qsignaltransition_p.h
+++ b/src/corelib/statemachine/qsignaltransition_p.h
@@ -70,7 +70,7 @@ public:
     void unregister();
     void maybeRegister();
 
-    virtual void callOnTransition(QEvent *e) override;
+    void callOnTransition(QEvent *e) override;
 
     const QObject *sender;
     QByteArray signal;
diff --git a/src/corelib/statemachine/qstate.cpp b/src/corelib/statemachine/qstate.cpp
index 2531874a87..62dd4f0284 100644
--- a/src/corelib/statemachine/qstate.cpp
+++ b/src/corelib/statemachine/qstate.cpp
@@ -285,7 +285,7 @@ QAbstractState *QState::errorState() const
 
 /*!
   Sets this state's error state to be the given \a state. If the error state
-  is not set, or if it is set to 0, the state will inherit its parent's error
+  is not set, or if it is set to \nullptr, the state will inherit its parent's error
   state recursively. If no error state is set for the state itself or any of
   its ancestors, an error will cause the machine to stop executing and an error
   will be printed to the console.
@@ -473,7 +473,8 @@ void QState::onExit(QEvent *event)
 }
 
 /*!
-  Returns this state's initial state, or 0 if the state has no initial state.
+  Returns this state's initial state, or \nullptr if the state has no
+  initial state.
 */
 QAbstractState *QState::initialState() const
 {
diff --git a/src/corelib/statemachine/qstatemachine.cpp b/src/corelib/statemachine/qstatemachine.cpp
index 7388d496d9..ee3f7be279 100644
--- a/src/corelib/statemachine/qstatemachine.cpp
+++ b/src/corelib/statemachine/qstatemachine.cpp
@@ -1721,8 +1721,8 @@ QAbstractTransition *QStateMachinePrivate::createInitialTransition() const
             : QAbstractTransition()
         { setTargetStates(targets); }
     protected:
-        virtual bool eventTest(QEvent *) override { return true; }
-        virtual void onTransition(QEvent *) override {}
+        bool eventTest(QEvent *) override { return true; }
+        void onTransition(QEvent *) override {}
     };
 
     QState *root = rootState();