Revamp the Console Asynchronous Writer Example

* Use the 'const' keywords more.
* Split very long lines.
* Remove QT_USE_NAMESPACE macro.
* Update includes to common style.
* Use more member class initializations.
* Remove empy dtor.

Task-number: QTBUG-60652
Change-Id: Ia9b108ad9fd65d55dd88e2d6c1e3ee36830abb6e
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

1 files changed, 14 insertions, 12 deletions

diff --git a/examples/serialport/cwriterasync/main.cpp b/examples/serialport/cwriterasync/main.cpp
index 4ffb44b..4d65e0a 100644
--- a/examples/serialport/cwriterasync/main.cpp
+++ b/examples/serialport/cwriterasync/main.cpp
@@ -50,33 +50,32 @@
 
 #include "serialportwriter.h"
 
-#include <QtSerialPort/QSerialPort>
-
-#include <QTextStream>
 #include <QCoreApplication>
 #include <QFile>
+#include <QSerialPort>
 #include <QStringList>
-
-QT_USE_NAMESPACE
+#include <QTextStream>
 
 int main(int argc, char *argv[])
 {
     QCoreApplication coreApplication(argc, argv);
-    int argumentCount = QCoreApplication::arguments().size();
-    QStringList argumentList = QCoreApplication::arguments();
+    const int argumentCount = QCoreApplication::arguments().size();
+    const QStringList argumentList = QCoreApplication::arguments();
 
     QTextStream standardOutput(stdout);
 
     if (argumentCount == 1) {
-        standardOutput << QObject::tr("Usage: %1 <serialportname> [baudrate]").arg(argumentList.first()) << endl;
+        standardOutput << QObject::tr("Usage: %1 <serialportname> [baudrate]")
+                          .arg(argumentList.first()) << endl;
         return 1;
     }
 
     QSerialPort serialPort;
-    QString serialPortName = argumentList.at(1);
+    const QString serialPortName = argumentList.at(1);
     serialPort.setPortName(serialPortName);
 
-    int serialPortBaudRate = (argumentCount > 2) ? argumentList.at(2).toInt() : QSerialPort::Baud9600;
+    const int serialPortBaudRate = (argumentCount > 2)
+            ? argumentList.at(2).toInt() : QSerialPort::Baud9600;
     serialPort.setBaudRate(serialPortBaudRate);
 
     serialPort.open(QIODevice::WriteOnly);
@@ -87,11 +86,14 @@ int main(int argc, char *argv[])
         return 1;
     }
 
-    QByteArray writeData(dataFile.readAll());
+    const QByteArray writeData(dataFile.readAll());
     dataFile.close();
 
     if (writeData.isEmpty()) {
-        standardOutput << QObject::tr("Either no data was currently available on the standard input for reading, or an error occurred for port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
+        standardOutput << QObject::tr("Either no data was currently available on "
+                                      "the standard input for reading, "
+                                      "or an error occurred for port %1, error: %2")
+                          .arg(serialPortName).arg(serialPort.errorString()) << endl;
         return 1;
     }