examples: Fix -Wdeprecated-copy warnings

examples/corelib/tools/customtypesending/window.cpp: In member function ‘void Window::sendMessage()’:
examples/corelib/tools/customtypesending/window.cpp:79:71: warning: implicitly-declared ‘Message& Message::operator=(const Message&)’ is deprecated [-Wdeprecated-copy]
   79 |     thisMessage = Message(editor->toPlainText(), thisMessage.headers());
      |                                                                       ^
In file included from examples/corelib/tools/customtypesending/window.h:55,
                 from examples/corelib/tools/customtypesending/window.cpp:52:
examples/corelib/tools/customtypesending/message.h:62:5: note: because ‘Message’ has user-provided ‘Message::Message(const Message&)’
   62 |     Message(const Message &other);
      |     ^~~~~~~
examples/corelib/tools/customtypesending/window.cpp: In member function ‘void Window::setMessage(const Message&)’:
examples/corelib/tools/customtypesending/window.cpp:87:19: warning: implicitly-declared ‘Message& Message::operator=(const Message&)’ is deprecated [-Wdeprecated-copy]
   87 |     thisMessage = message;
      |                   ^~~~~~~
In file included from examples/corelib/tools/customtypesending/window.h:55,
                 from examples/corelib/tools/customtypesending/window.cpp:52:
examples/corelib/tools/customtypesending/message.h:62:5: note: because ‘Message’ has user-provided ‘Message::Message(const Message&)’
   62 |     Message(const Message &other);
      |     ^~~~~~~

Change-Id: I563d53f7dd1e0e0dc5fd4db06299b2d0a70c62ff
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

5 files changed, 8 insertions, 39 deletions

diff --git a/examples/corelib/tools/customtype/message.cpp b/examples/corelib/tools/customtype/message.cpp
index cc96aee978..e83697cb74 100644
--- a/examples/corelib/tools/customtype/message.cpp
+++ b/examples/corelib/tools/customtype/message.cpp
@@ -52,21 +52,6 @@
 
 #include <QDebug>
 
-//! [Message class implementation]
-Message::Message()
-{
-}
-
-Message::Message(const Message &other)
-    : m_body(other.m_body), m_headers(other.m_headers)
-{
-}
-
-Message::~Message()
-{
-}
-//! [Message class implementation]
-
 Message::Message(const QString &body, const QStringList &headers)
     : m_body(body), m_headers(headers)
 {
diff --git a/examples/corelib/tools/customtype/message.h b/examples/corelib/tools/customtype/message.h
index c1b8243237..bc30c45425 100644
--- a/examples/corelib/tools/customtype/message.h
+++ b/examples/corelib/tools/customtype/message.h
@@ -58,9 +58,10 @@
 class Message
 {
 public:
-    Message();
-    Message(const Message &other);
-    ~Message();
+    Message() = default;
+    ~Message() = default;
+    Message(const Message &) = default;
+    Message &operator=(const Message &) = default;
 
     Message(const QString &body, const QStringList &headers);
 
diff --git a/examples/corelib/tools/customtypesending/message.cpp b/examples/corelib/tools/customtypesending/message.cpp
index 9386b93898..76f90e5144 100644
--- a/examples/corelib/tools/customtypesending/message.cpp
+++ b/examples/corelib/tools/customtypesending/message.cpp
@@ -50,19 +50,6 @@
 
 #include "message.h"
 
-Message::Message()
-{
-}
-
-Message::Message(const Message &other)
-    : m_body(other.m_body), m_headers(other.m_headers)
-{
-}
-
-Message::~Message()
-{
-}
-
 Message::Message(const QString &body, const QStringList &headers)
     : m_body(body), m_headers(headers)
 {
diff --git a/examples/corelib/tools/customtypesending/message.h b/examples/corelib/tools/customtypesending/message.h
index a93f111e45..38b5c8205f 100644
--- a/examples/corelib/tools/customtypesending/message.h
+++ b/examples/corelib/tools/customtypesending/message.h
@@ -58,9 +58,10 @@
 class Message
 {
 public:
-    Message();
-    Message(const Message &other);
-    ~Message();
+    Message() = default;
+    ~Message() = default;
+    Message(const Message &) = default;
+    Message &operator=(const Message &) = default;
 
     Message(const QString &body, const QStringList &headers);
 
diff --git a/examples/corelib/tools/doc/src/customtype.qdoc b/examples/corelib/tools/doc/src/customtype.qdoc
index 7ccfc95c70..fb63bc539c 100644
--- a/examples/corelib/tools/doc/src/customtype.qdoc
+++ b/examples/corelib/tools/doc/src/customtype.qdoc
@@ -81,11 +81,6 @@
 
     \section1 The Message Class Implementation
 
-    The implementation of the default constructor, copy constructor and destructor
-    are straightforward for the \c Message class:
-
-    \snippet tools/customtype/message.cpp Message class implementation
-
     The streaming operator is implemented in the following way:
 
     \snippet tools/customtype/message.cpp custom type streaming operator