6 files changed, 7 insertions, 7 deletions
diff --git a/src/corelib/doc/snippets/code/doc_src_properties.cpp b/src/corelib/doc/snippets/code/doc_src_properties.cpp
index 47dff630f8..5a5627abfd 100644
--- a/src/corelib/doc/snippets/code/doc_src_properties.cpp
+++ b/src/corelib/doc/snippets/code/doc_src_properties.cpp
@@ -106,7 +106,7 @@ class MyClass : public QObject
     Q_PROPERTY(Priority priority READ priority WRITE setPriority NOTIFY priorityChanged)
 
 public:
-    MyClass(QObject *parent = 0);
+    MyClass(QObject *parent = nullptr);
     ~MyClass();
 
     enum Priority { High, Low, VeryHigh, VeryLow };
diff --git a/src/corelib/doc/snippets/eventfilters/filterobject.h b/src/corelib/doc/snippets/eventfilters/filterobject.h
index 354aa4ff5c..d249743a15 100644
--- a/src/corelib/doc/snippets/eventfilters/filterobject.h
+++ b/src/corelib/doc/snippets/eventfilters/filterobject.h
@@ -58,7 +58,7 @@ class FilterObject : public QObject
     Q_OBJECT
 
 public:
-    FilterObject(QObject *parent = 0);
+    FilterObject(QObject *parent = nullptr);
     bool eventFilter(QObject *object, QEvent *event) override;
     void setFilteredObject(QObject *object);
 
diff --git a/src/corelib/doc/snippets/qsortfilterproxymodel-details/main.cpp b/src/corelib/doc/snippets/qsortfilterproxymodel-details/main.cpp
index 2a7b310716..a79f07c3ae 100644
--- a/src/corelib/doc/snippets/qsortfilterproxymodel-details/main.cpp
+++ b/src/corelib/doc/snippets/qsortfilterproxymodel-details/main.cpp
@@ -55,7 +55,7 @@
 class MyItemModel : public QStandardItemModel
 {
 public:
-    MyItemModel(QWidget *parent = 0);
+    MyItemModel(QWidget *parent = nullptr);
 };
 
 MyItemModel::MyItemModel(QWidget *parent)
@@ -65,7 +65,7 @@ MyItemModel::MyItemModel(QWidget *parent)
 class Widget : public QWidget
 {
 public:
-    Widget(QWidget *parent = 0);
+    Widget(QWidget *parent = nullptr);
 };
 
 Widget::Widget(QWidget *parent)
diff --git a/src/corelib/doc/snippets/qstring/main.cpp b/src/corelib/doc/snippets/qstring/main.cpp
index cb557ac023..419b98366d 100644
--- a/src/corelib/doc/snippets/qstring/main.cpp
+++ b/src/corelib/doc/snippets/qstring/main.cpp
@@ -55,7 +55,7 @@
 class Widget : public QWidget
 {
 public:
-    Widget(QWidget *parent = 0);
+    Widget(QWidget *parent = nullptr);
 
     void constCharPointer();
     void constCharArray();
diff --git a/src/corelib/doc/snippets/qstringlist/main.cpp b/src/corelib/doc/snippets/qstringlist/main.cpp
index 5284a5fb78..fceadc4e99 100644
--- a/src/corelib/doc/snippets/qstringlist/main.cpp
+++ b/src/corelib/doc/snippets/qstringlist/main.cpp
@@ -55,7 +55,7 @@ using namespace std;
 class Widget : public QWidget
 {
 public:
-    Widget(QWidget *parent = 0);
+    Widget(QWidget *parent = nullptr);
 };
 
 Widget::Widget(QWidget *parent)
diff --git a/src/corelib/doc/snippets/qstringlistmodel/main.cpp b/src/corelib/doc/snippets/qstringlistmodel/main.cpp
index 4c9519d2b2..fa7f414526 100644
--- a/src/corelib/doc/snippets/qstringlistmodel/main.cpp
+++ b/src/corelib/doc/snippets/qstringlistmodel/main.cpp
@@ -53,7 +53,7 @@
 class Widget : public QWidget
 {
 public:
-    Widget(QWidget *parent = 0);
+    Widget(QWidget *parent = nullptr);
 };
 
 Widget::Widget(QWidget *parent)