Reference Examples: Fix calls to exec() and exit codes

exec() is a static member of QCoreApplication and should be called as
such. In case of errors we should return a non-0 exit code from main().

Change-Id: I0fefa006841b367d06a9de1fd1284cb7caf467bd
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

11 files changed, 34 insertions, 32 deletions

diff --git a/examples/qml/referenceexamples/adding/main.cpp b/examples/qml/referenceexamples/adding/main.cpp
index e312149da1..87a7b75764 100644
--- a/examples/qml/referenceexamples/adding/main.cpp
+++ b/examples/qml/referenceexamples/adding/main.cpp
@@ -70,5 +70,5 @@ int main(int argc, char ** argv)
         qWarning() << component.errors();
     }
 
-    return 0;
+    return EXIT_SUCCESS;
 }
diff --git a/examples/qml/referenceexamples/attached/main.cpp b/examples/qml/referenceexamples/attached/main.cpp
index 444acfdee7..eb70625bea 100644
--- a/examples/qml/referenceexamples/attached/main.cpp
+++ b/examples/qml/referenceexamples/attached/main.cpp
@@ -93,9 +93,9 @@ int main(int argc, char ** argv)
                 qWarning() << "   " << guest->name() << "RSVP date:" << qPrintable(rsvpDate.toString());
         }
 
-    } else {
-        qWarning() << component.errors();
+        return EXIT_SUCCESS;
     }
 
-    return 0;
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/binding/main.cpp b/examples/qml/referenceexamples/binding/main.cpp
index 18a424ff38..eca524dfe2 100644
--- a/examples/qml/referenceexamples/binding/main.cpp
+++ b/examples/qml/referenceexamples/binding/main.cpp
@@ -94,9 +94,9 @@ int main(int argc, char ** argv)
         }
 
         party->startParty();
-    } else {
-        qWarning() << component.errors();
+        return QCoreApplication::exec();
     }
 
-    return app.exec();
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/coercion/main.cpp b/examples/qml/referenceexamples/coercion/main.cpp
index b7d211b73a..39064f8b89 100644
--- a/examples/qml/referenceexamples/coercion/main.cpp
+++ b/examples/qml/referenceexamples/coercion/main.cpp
@@ -82,9 +82,10 @@ int main(int argc, char ** argv)
 
         for (int ii = 0; ii < party->guestCount(); ++ii)
             qWarning() << "   " << party->guest(ii)->name();
-    } else {
-        qWarning() << component.errors();
+
+        return EXIT_SUCCESS;
     }
 
-    return 0;
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/default/main.cpp b/examples/qml/referenceexamples/default/main.cpp
index c63a3a5788..f6ca77e82d 100644
--- a/examples/qml/referenceexamples/default/main.cpp
+++ b/examples/qml/referenceexamples/default/main.cpp
@@ -77,9 +77,10 @@ int main(int argc, char ** argv)
 
         for (int ii = 0; ii < party->guestCount(); ++ii)
             qWarning() << "   " << party->guest(ii)->name();
-    } else {
-        qWarning() << component.errors();
+
+        return EXIT_SUCCESS;
     }
 
-    return 0;
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/extended/main.cpp b/examples/qml/referenceexamples/extended/main.cpp
index f91cec76b1..5f8582d08f 100644
--- a/examples/qml/referenceexamples/extended/main.cpp
+++ b/examples/qml/referenceexamples/extended/main.cpp
@@ -70,9 +70,9 @@ int main(int argc, char ** argv)
 
     if (edit) {
         edit->show();
-        return app.exec();
-    } else {
-        qWarning() << component.errors();
-        return 0;
+        return QApplication::exec();
     }
+
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/grouped/main.cpp b/examples/qml/referenceexamples/grouped/main.cpp
index a237006e29..4f4b828cef 100644
--- a/examples/qml/referenceexamples/grouped/main.cpp
+++ b/examples/qml/referenceexamples/grouped/main.cpp
@@ -87,9 +87,9 @@ int main(int argc, char ** argv)
         if (bestShoe)
             qWarning() << bestShoe->name() << "is wearing the best shoes!";
 
-    } else {
-        qWarning() << component.errors();
+        return EXIT_SUCCESS;
     }
 
-    return 0;
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/methods/main.cpp b/examples/qml/referenceexamples/methods/main.cpp
index 89404ec822..e2a1a28c8b 100644
--- a/examples/qml/referenceexamples/methods/main.cpp
+++ b/examples/qml/referenceexamples/methods/main.cpp
@@ -70,9 +70,9 @@ int main(int argc, char ** argv)
         qWarning() << "They are inviting:";
         for (int ii = 0; ii < party->guestCount(); ++ii)
             qWarning() << "   " << party->guest(ii)->name();
-    } else {
-        qWarning() << component.errors();
+        return EXIT_SUCCESS;
     }
 
-    return 0;
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/properties/main.cpp b/examples/qml/referenceexamples/properties/main.cpp
index a0a2335034..60b56bd247 100644
--- a/examples/qml/referenceexamples/properties/main.cpp
+++ b/examples/qml/referenceexamples/properties/main.cpp
@@ -72,9 +72,9 @@ int main(int argc, char ** argv)
         qWarning() << "They are inviting:";
         for (int ii = 0; ii < party->guestCount(); ++ii)
             qWarning() << "   " << party->guest(ii)->name();
-    } else {
-        qWarning() << component.errors();
+        return EXIT_SUCCESS;
     }
 
-    return 0;
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/signal/main.cpp b/examples/qml/referenceexamples/signal/main.cpp
index c62dd8ffc0..f55b4cb419 100644
--- a/examples/qml/referenceexamples/signal/main.cpp
+++ b/examples/qml/referenceexamples/signal/main.cpp
@@ -93,9 +93,9 @@ int main(int argc, char ** argv)
         }
 
         party->startParty();
-    } else {
-        qWarning() << component.errors();
+        return EXIT_SUCCESS;
     }
 
-    return 0;
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }
diff --git a/examples/qml/referenceexamples/valuesource/main.cpp b/examples/qml/referenceexamples/valuesource/main.cpp
index 246954005a..ab50f00696 100644
--- a/examples/qml/referenceexamples/valuesource/main.cpp
+++ b/examples/qml/referenceexamples/valuesource/main.cpp
@@ -95,9 +95,9 @@ int main(int argc, char ** argv)
         }
 
         party->startParty();
-    } else {
-        qWarning() << component.errors();
+        return QCoreApplication::exec();
     }
 
-    return app.exec();
+    qWarning() << component.errors();
+    return EXIT_FAILURE;
 }