5 files changed, 13 insertions, 12 deletions
diff --git a/src/corelib/tools/qcommandlineparser.cpp b/src/corelib/tools/qcommandlineparser.cpp
index 6587d900d2..a7ab8b9e70 100644
--- a/src/corelib/tools/qcommandlineparser.cpp
+++ b/src/corelib/tools/qcommandlineparser.cpp
@@ -887,7 +887,8 @@ QStringList QCommandLineParser::values(const QString &optionName) const
 bool QCommandLineParser::isSet(const QCommandLineOption &option) const
 {
     // option.names() might be empty if the constructor failed
-    return !option.names().isEmpty() && isSet(option.names().first());
+    const auto names = option.names();
+    return !names.isEmpty() && isSet(names.first());
 }
 
 /*!
@@ -905,7 +906,7 @@ bool QCommandLineParser::isSet(const QCommandLineOption &option) const
 */
 QString QCommandLineParser::value(const QCommandLineOption &option) const
 {
-    return value(option.names().first());
+    return value(option.names().constFirst());
 }
 
 /*!
@@ -923,7 +924,7 @@ QString QCommandLineParser::value(const QCommandLineOption &option) const
 */
 QStringList QCommandLineParser::values(const QCommandLineOption &option) const
 {
-    return values(option.names().first());
+    return values(option.names().constFirst());
 }
 
 /*!
diff --git a/src/corelib/tools/qeasingcurve.cpp b/src/corelib/tools/qeasingcurve.cpp
index 2851dc81d6..4b5f5e7830 100644
--- a/src/corelib/tools/qeasingcurve.cpp
+++ b/src/corelib/tools/qeasingcurve.cpp
@@ -444,7 +444,7 @@ struct BezierEase : public QEasingCurveFunction
 
     void init()
     {
-        if (_bezierCurves.last() == QPointF(1.0, 1.0)) {
+        if (_bezierCurves.constLast() == QPointF(1.0, 1.0)) {
             _init = true;
             _curveCount = _bezierCurves.count() / 3;
 
diff --git a/src/corelib/tools/qlocale_unix.cpp b/src/corelib/tools/qlocale_unix.cpp
index 9b0d338e46..095001e0a3 100644
--- a/src/corelib/tools/qlocale_unix.cpp
+++ b/src/corelib/tools/qlocale_unix.cpp
@@ -122,7 +122,7 @@ QLocale QSystemLocale::fallbackUiLocale() const
     // the first part of LANGUAGE if LANGUAGE is set and has a first part:
     QByteArray language = qgetenv("LANGUAGE");
     if (!language.isEmpty()) {
-        language = language.split(':').first();
+        language = language.split(':').constFirst();
         if (!language.isEmpty())
             return QLocale(QString::fromLatin1(language));
     }
diff --git a/src/corelib/tools/qringbuffer.cpp b/src/corelib/tools/qringbuffer.cpp
index db2004dfd9..4a2dfdec2b 100644
--- a/src/corelib/tools/qringbuffer.cpp
+++ b/src/corelib/tools/qringbuffer.cpp
@@ -74,14 +74,14 @@ void QRingBuffer::free(qint64 bytes)
     Q_ASSERT(bytes <= bufferSize);
 
     while (bytes > 0) {
-        const qint64 blockSize = buffers.first().size() - head;
+        const qint64 blockSize = buffers.constFirst().size() - head;
 
         if (tailBuffer == 0 || blockSize > bytes) {
             // keep a single block around if it does not exceed
             // the basic block size, to avoid repeated allocations
             // between uses of the buffer
             if (bufferSize <= bytes) {
-                if (buffers.first().size() <= basicBlockSize) {
+                if (buffers.constFirst().size() <= basicBlockSize) {
                     bufferSize = 0;
                     head = tail = 0;
                 } else {
@@ -114,8 +114,8 @@ char *QRingBuffer::reserve(qint64 bytes)
     } else {
         const qint64 newSize = bytes + tail;
         // if need buffer reallocation
-        if (newSize > buffers.last().size()) {
-            if (newSize > buffers.last().capacity() && (tail >= basicBlockSize
+        if (newSize > buffers.constLast().size()) {
+            if (newSize > buffers.constLast().capacity() && (tail >= basicBlockSize
                     || newSize >= MaxByteArraySize)) {
                 // shrink this buffer to its current size
                 buffers.last().resize(tail);
@@ -180,7 +180,7 @@ void QRingBuffer::chop(qint64 bytes)
             // the basic block size, to avoid repeated allocations
             // between uses of the buffer
             if (bufferSize <= bytes) {
-                if (buffers.first().size() <= basicBlockSize) {
+                if (buffers.constFirst().size() <= basicBlockSize) {
                     bufferSize = 0;
                     head = tail = 0;
                 } else {
@@ -198,7 +198,7 @@ void QRingBuffer::chop(qint64 bytes)
         bytes -= tail;
         buffers.removeLast();
         --tailBuffer;
-        tail = buffers.last().size();
+        tail = buffers.constLast().size();
     }
 }
 
diff --git a/src/corelib/tools/qtimezoneprivate_mac.mm b/src/corelib/tools/qtimezoneprivate_mac.mm
index 14b0523ca7..3a665c2b00 100644
--- a/src/corelib/tools/qtimezoneprivate_mac.mm
+++ b/src/corelib/tools/qtimezoneprivate_mac.mm
@@ -243,7 +243,7 @@ QTimeZonePrivate::Data QMacTimeZonePrivate::previousTransition(qint64 beforeMSec
         }
     }
     if (secsList.size() >= 1)
-        return data(qint64(secsList.last()) * 1000);
+        return data(qint64(secsList.constLast()) * 1000);
     else
         return invalidData();
 }