STL compatibility: use front() instead of first()

This is a simple find and replace with manual sanity check.

Change-Id: I82f0eb38b6a5a3b75a4ed38d97bdb6ce164d09b3
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

30 files changed, 161 insertions, 161 deletions

diff --git a/src/app/config-ui/commandlineparser.cpp b/src/app/config-ui/commandlineparser.cpp
index 718b64b0a..5c5606442 100644
--- a/src/app/config-ui/commandlineparser.cpp
+++ b/src/app/config-ui/commandlineparser.cpp
@@ -59,7 +59,7 @@ void CommandLineParser::parse(const QStringList &commandLine)
 
     if (m_commandLine.isEmpty())
         return;
-    const QString &arg = m_commandLine.first();
+    const QString &arg = m_commandLine.front();
     if (arg == helpOptionShort() || arg == helpOptionLong()) {
         m_commandLine.removeFirst();
         m_helpRequested = true;
diff --git a/src/app/config-ui/mainwindow.cpp b/src/app/config-ui/mainwindow.cpp
index c5f629278..4de5c85d8 100644
--- a/src/app/config-ui/mainwindow.cpp
+++ b/src/app/config-ui/mainwindow.cpp
@@ -184,7 +184,7 @@ bool MainWindow::eventFilter(QObject *watched, QEvent *event)
         if (keyEvent->matches(QKeySequence::Delete)) {
             const QModelIndexList indexes = ui->treeView->selectionModel()->selectedRows();
             if (indexes.count() == 1) {
-                const QModelIndex index = indexes.first();
+                const QModelIndex index = indexes.front();
                 if (index.isValid()) {
                     m_model->removeKey(index);
                     return true;
diff --git a/src/app/config/configcommandexecutor.cpp b/src/app/config/configcommandexecutor.cpp
index 9341663dd..a8ae28f66 100644
--- a/src/app/config/configcommandexecutor.cpp
+++ b/src/app/config/configcommandexecutor.cpp
@@ -63,7 +63,7 @@ void ConfigCommandExecutor::execute(const ConfigCommand &command)
         printSettings(command);
         break;
     case ConfigCommand::CfgSet:
-        setValue(command.varNames.first(), command.varValue);
+        setValue(command.varNames.front(), command.varValue);
         break;
     case ConfigCommand::CfgUnset:
         foreach (const QString &varName, command.varNames)
diff --git a/src/app/config/configcommandlineparser.cpp b/src/app/config/configcommandlineparser.cpp
index 595a23ef4..45fb79231 100644
--- a/src/app/config/configcommandlineparser.cpp
+++ b/src/app/config/configcommandlineparser.cpp
@@ -55,13 +55,13 @@ void ConfigCommandLineParser::parse(const QStringList &commandLine)
     m_commandLine = commandLine;
     if (m_commandLine.isEmpty())
         throw ErrorInfo(Tr::tr("No parameters supplied."));
-    if (m_commandLine.count() == 1 && (m_commandLine.first() == QLatin1String("--help")
-                              || m_commandLine.first() == QLatin1String("-h"))) {
+    if (m_commandLine.count() == 1 && (m_commandLine.front() == QLatin1String("--help")
+                              || m_commandLine.front() == QLatin1String("-h"))) {
         m_helpRequested = true;
         return;
     }
 
-    while (!m_commandLine.isEmpty() && m_commandLine.first().startsWith(QLatin1String("--"))) {
+    while (!m_commandLine.isEmpty() && m_commandLine.front().startsWith(QLatin1String("--"))) {
         const QString arg = m_commandLine.takeFirst().mid(2);
         if (arg == QLatin1String("list"))
             setCommand(ConfigCommand::CfgList);
@@ -83,7 +83,7 @@ void ConfigCommandLineParser::parse(const QStringList &commandLine)
             throw ErrorInfo(Tr::tr("No parameters supplied."));
         if (m_commandLine.count() > 2)
             throw ErrorInfo(Tr::tr("Too many arguments."));
-        m_command.varNames << m_commandLine.first();
+        m_command.varNames << m_commandLine.front();
         if (m_commandLine.count() == 1) {
             setCommand(ConfigCommand::CfgList);
         } else {
@@ -99,12 +99,12 @@ void ConfigCommandLineParser::parse(const QStringList &commandLine)
     case ConfigCommand::CfgExport:
         if (m_commandLine.count() != 1)
             throw ErrorInfo(Tr::tr("Need name of file to which to export."));
-        m_command.fileName = m_commandLine.first();
+        m_command.fileName = m_commandLine.front();
         break;
     case ConfigCommand::CfgImport:
         if (m_commandLine.count() != 1)
             throw ErrorInfo(Tr::tr("Need name of file from which to import."));
-        m_command.fileName = m_commandLine.first();
+        m_command.fileName = m_commandLine.front();
         break;
     case ConfigCommand::CfgList:
         m_command.varNames = m_commandLine;
diff --git a/src/app/qbs-setup-android/commandlineparser.cpp b/src/app/qbs-setup-android/commandlineparser.cpp
index f5a5c3aa3..d2465f395 100644
--- a/src/app/qbs-setup-android/commandlineparser.cpp
+++ b/src/app/qbs-setup-android/commandlineparser.cpp
@@ -72,7 +72,7 @@ void CommandLineParser::parse(const QStringList &commandLine)
         throwError(Tr::tr("No command-line arguments provided."));
 
     while (!m_commandLine.isEmpty()) {
-        const QString arg = m_commandLine.first();
+        const QString arg = m_commandLine.front();
         if (!arg.startsWith(QLatin1Char('-')))
             break;
         m_commandLine.removeFirst();
diff --git a/src/app/qbs-setup-qt/commandlineparser.cpp b/src/app/qbs-setup-qt/commandlineparser.cpp
index 9a6a003f7..c51af58a0 100644
--- a/src/app/qbs-setup-qt/commandlineparser.cpp
+++ b/src/app/qbs-setup-qt/commandlineparser.cpp
@@ -65,7 +65,7 @@ void CommandLineParser::parse(const QStringList &commandLine)
         throwError(Tr::tr("No command-line arguments provided."));
 
     while (!m_commandLine.isEmpty()) {
-        const QString arg = m_commandLine.first();
+        const QString arg = m_commandLine.front();
         if (!arg.startsWith(QLatin1Char('-')))
             break;
         m_commandLine.removeFirst();
diff --git a/src/app/qbs-setup-qt/setupqt.cpp b/src/app/qbs-setup-qt/setupqt.cpp
index d6eb282eb..23a5b2736 100644
--- a/src/app/qbs-setup-qt/setupqt.cpp
+++ b/src/app/qbs-setup-qt/setupqt.cpp
@@ -566,9 +566,9 @@ void SetupQt::saveToQbsSettings(const QString &qtVersionName, const QtEnvironmen
 
     QString bestMatch;
     if (fullMatches.count() == 1)
-        bestMatch = fullMatches.first();
+        bestMatch = fullMatches.front();
     else if (fullMatches.isEmpty() && partialMatches.count() == 1)
-        bestMatch = partialMatches.first();
+        bestMatch = partialMatches.front();
     if (bestMatch.isEmpty()) {
         QString message = Tr::tr("You need to set up toolchain information before you can "
                                  "use this Qt version for building. ");
diff --git a/src/app/qbs-setup-toolchains/commandlineparser.cpp b/src/app/qbs-setup-toolchains/commandlineparser.cpp
index b1cbc9129..f67a24ab3 100644
--- a/src/app/qbs-setup-toolchains/commandlineparser.cpp
+++ b/src/app/qbs-setup-toolchains/commandlineparser.cpp
@@ -67,7 +67,7 @@ void CommandLineParser::parse(const QStringList &commandLine)
         throwError(Tr::tr("No command-line arguments provided."));
 
     while (!m_commandLine.isEmpty()) {
-        const QString arg = m_commandLine.first();
+        const QString arg = m_commandLine.front();
         if (!arg.startsWith(QLatin1Char('-')))
             break;
         m_commandLine.removeFirst();
diff --git a/src/app/qbs-setup-toolchains/probe.cpp b/src/app/qbs-setup-toolchains/probe.cpp
index 2bb99abfd..c2bc06c7d 100644
--- a/src/app/qbs-setup-toolchains/probe.cpp
+++ b/src/app/qbs-setup-toolchains/probe.cpp
@@ -290,7 +290,7 @@ void probe(Settings *settings)
     if (profiles.isEmpty()) {
         qStderr << Tr::tr("Could not detect any toolchains. No profile created.") << endl;
     } else if (profiles.count() == 1 && settings->defaultProfile().isEmpty()) {
-        const QString profileName = profiles.first().name();
+        const QString profileName = profiles.front().name();
         qStdout << Tr::tr("Making profile '%1' the default.").arg(profileName) << endl;
         settings->setValue(QLatin1String("defaultProfile"), profileName);
     }
diff --git a/src/app/qbs/commandlinefrontend.cpp b/src/app/qbs/commandlinefrontend.cpp
index 2a6dae2b6..2c4290c46 100644
--- a/src/app/qbs/commandlinefrontend.cpp
+++ b/src/app/qbs/commandlinefrontend.cpp
@@ -374,7 +374,7 @@ void CommandLineFrontend::handleProjectsResolved()
         qApp->exit(runShell());
         break;
     case StatusCommandType:
-        qApp->exit(printStatus(m_projects.first().projectData()));
+        qApp->exit(printStatus(m_projects.front().projectData()));
         break;
     case GenerateCommandType:
         checkGeneratorName();
@@ -431,20 +431,20 @@ int CommandLineFrontend::runShell()
     case 0: // No specific product, use project-global environment.
         break;
     case 1:
-        productToRun = productsToUse().values().first().first();
+        productToRun = productsToUse().values().front().front();
         break;
     default:
         throw ErrorInfo(Tr::tr("The command '%1' cannot take more than one product."));
     }
-    RunEnvironment runEnvironment = m_projects.first().getRunEnvironment(productToRun,
-            m_parser.installOptions(m_projects.first().profile()),
+    RunEnvironment runEnvironment = m_projects.front().getRunEnvironment(productToRun,
+            m_parser.installOptions(m_projects.front().profile()),
             QProcessEnvironment::systemEnvironment(), m_settings);
     return runEnvironment.doRunShell();
 }
 
 BuildOptions CommandLineFrontend::buildOptions(const Project &project) const
 {
-    BuildOptions options = m_parser.buildOptions(m_projects.first().profile());
+    BuildOptions options = m_parser.buildOptions(m_projects.front().profile());
     if (options.maxJobCount() <= 0) {
         const QString profileName = project.profile();
         QBS_CHECK(!profileName.isEmpty());
@@ -541,8 +541,8 @@ int CommandLineFrontend::runTarget()
         throw ErrorInfo(Tr::tr("Cannot run: Product '%1' is not an application.")
                     .arg(productToRun.name()));
     }
-    RunEnvironment runEnvironment = m_projects.first().getRunEnvironment(productToRun,
-            m_parser.installOptions(m_projects.first().profile()),
+    RunEnvironment runEnvironment = m_projects.front().getRunEnvironment(productToRun,
+            m_parser.installOptions(m_projects.front().profile()),
             QProcessEnvironment::systemEnvironment(), m_settings);
     return runEnvironment.doRunTarget(executableFilePath, m_parser.runArgs());
 }
@@ -560,8 +560,8 @@ void CommandLineFrontend::dumpNodesTree()
 {
     QFile stdOut;
     stdOut.open(stdout, QIODevice::WriteOnly);
-    const ErrorInfo error = m_projects.first().dumpNodesTree(stdOut, productsToUse()
-                                                             .value(m_projects.first()));
+    const ErrorInfo error = m_projects.front().dumpNodesTree(stdOut, productsToUse()
+                                                             .value(m_projects.front()));
     if (error.hasError())
         throw error;
 }
@@ -615,8 +615,8 @@ ProductData CommandLineFrontend::getTheOneRunnableProduct()
     QBS_CHECK(m_projects.count() == 1); // Has been checked earlier.
 
     if (m_parser.products().count() == 1) {
-        foreach (const ProductData &p, m_projects.first().projectData().allProducts()) {
-            if (p.name() == m_parser.products().first())
+        foreach (const ProductData &p, m_projects.front().projectData().allProducts()) {
+            if (p.name() == m_parser.products().front())
                 return p;
         }
         QBS_CHECK(false);
@@ -624,13 +624,13 @@ ProductData CommandLineFrontend::getTheOneRunnableProduct()
     QBS_CHECK(m_parser.products().count() == 0);
 
     QList<ProductData> runnableProducts;
-    foreach (const ProductData &p, m_projects.first().projectData().allProducts()) {
+    foreach (const ProductData &p, m_projects.front().projectData().allProducts()) {
         if (p.isRunnable())
             runnableProducts << p;
     }
 
     if (runnableProducts.count() == 1)
-        return runnableProducts.first();
+        return runnableProducts.front();
 
     if (runnableProducts.isEmpty()) {
         throw ErrorInfo(Tr::tr("Cannot execute command '%1': Project has no runnable product.")
@@ -642,7 +642,7 @@ ProductData CommandLineFrontend::getTheOneRunnableProduct()
     error.append(Tr::tr("Use the '--products' option with one of the following products:"));
     foreach (const ProductData &p, runnableProducts) {
         QString productRepr = QLatin1String("\t") + p.name();
-        if (p.profile() != m_projects.first().profile()) {
+        if (p.profile() != m_projects.front().profile()) {
             productRepr.append(QLatin1String(" [")).append(p.profile())
                     .append(QLatin1Char(']'));
         }
@@ -654,7 +654,7 @@ ProductData CommandLineFrontend::getTheOneRunnableProduct()
 void CommandLineFrontend::install()
 {
     Q_ASSERT(m_projects.count() == 1);
-    const Project project = m_projects.first();
+    const Project project = m_projects.front();
     InstallJob *installJob;
     if (m_parser.products().isEmpty()) {
         const Project::ProductSelection productSelection = m_parser.withNonDefaultProducts()
@@ -662,7 +662,7 @@ void CommandLineFrontend::install()
         installJob = project.installAllProducts(m_parser.installOptions(project.profile()),
                                                 productSelection);
     } else {
-        const Project project = m_projects.first();
+        const Project project = m_projects.front();
         const ProductMap products = productsToUse();
         installJob = project.installSomeProducts(products.value(project),
                                                  m_parser.installOptions(project.profile()));
diff --git a/src/app/qbs/parser/commandlineparser.cpp b/src/app/qbs/parser/commandlineparser.cpp
index 434ddf126..c223ea735 100644
--- a/src/app/qbs/parser/commandlineparser.cpp
+++ b/src/app/qbs/parser/commandlineparser.cpp
@@ -321,16 +321,16 @@ void CommandLineParser::CommandLineParserPrivate::doParse()
     if (commandLine.isEmpty()) { // No command given, use default.
         command = commandPool.getCommand(BuildCommandType);
     } else {
-        command = commandFromString(commandLine.first());
+        command = commandFromString(commandLine.front());
         if (command) {
             commandLine.removeFirst();
         } else { // No command given.
-            if (commandLine.first() == QLatin1String("-h")
-                    || commandLine.first() == QLatin1String("--help")) {
+            if (commandLine.front() == QLatin1String("-h")
+                    || commandLine.front() == QLatin1String("--help")) {
                 command = commandPool.getCommand(HelpCommandType);
                 commandLine.takeFirst();
-            } else if (commandLine.first() == QLatin1String("-V")
-                       || commandLine.first() == QLatin1String("--version")) {
+            } else if (commandLine.front() == QLatin1String("-V")
+                       || commandLine.front() == QLatin1String("--version")) {
                 command = commandPool.getCommand(VersionCommandType);
                 commandLine.takeFirst();
             } else {
diff --git a/src/app/qbs/parser/parsercommand.cpp b/src/app/qbs/parser/parsercommand.cpp
index dd07f2cce..7bf147cea 100644
--- a/src/app/qbs/parser/parsercommand.cpp
+++ b/src/app/qbs/parser/parsercommand.cpp
@@ -101,7 +101,7 @@ QList<CommandLineOption::Type> Command::actualSupportedOptions() const
 
 void Command::parseOption(QStringList &input)
 {
-    const QString optionString = input.first();
+    const QString optionString = input.front();
     QBS_CHECK(optionString.startsWith(QLatin1Char('-')));
     input.removeFirst();
     if (optionString.count() == 1)
@@ -148,7 +148,7 @@ void Command::parseOption(QStringList &input)
 void Command::parseNext(QStringList &input)
 {
     QBS_CHECK(!input.empty());
-    if (input.first().startsWith(QLatin1Char('-')))
+    if (input.front().startsWith(QLatin1Char('-')))
         parseOption(input);
     else
         parsePropertyAssignment(input.takeFirst());
@@ -392,7 +392,7 @@ QList<CommandLineOption::Type> RunCommand::supportedOptions() const
 void RunCommand::parseNext(QStringList &input)
 {
     QBS_CHECK(!input.empty());
-    if (input.first() != QLatin1String("--")) {
+    if (input.front() != QLatin1String("--")) {
         Command::parseNext(input);
         return;
     }
diff --git a/src/lib/corelib/api/changeset.cpp b/src/lib/corelib/api/changeset.cpp
index ad070744c..bd04fe006 100644
--- a/src/lib/corelib/api/changeset.cpp
+++ b/src/lib/corelib/api/changeset.cpp
@@ -373,7 +373,7 @@ void ChangeSet::apply_helper()
     QList<EditOp> replaceList;
     {
         while (!m_operationList.isEmpty()) {
-            const EditOp cmd(m_operationList.first());
+            const EditOp cmd(m_operationList.front());
             m_operationList.removeFirst();
             convertToReplace(cmd, &replaceList);
         }
@@ -384,7 +384,7 @@ void ChangeSet::apply_helper()
         m_cursor->beginEditBlock();
 
     while (!replaceList.isEmpty()) {
-        const EditOp cmd(replaceList.first());
+        const EditOp cmd(replaceList.front());
         replaceList.removeFirst();
         doReplace(cmd, &replaceList);
     }
diff --git a/src/lib/corelib/api/project.cpp b/src/lib/corelib/api/project.cpp
index 648022b32..4101f705d 100644
--- a/src/lib/corelib/api/project.cpp
+++ b/src/lib/corelib/api/project.cpp
@@ -337,14 +337,14 @@ void ProjectPrivate::addGroup(const ProductData &product, const QString &groupNa
     const QList<ResolvedProductPtr> resolvedProducts = internalProducts(products);
     QBS_CHECK(products.count() == resolvedProducts.count());
 
-    for (const GroupPtr &resolvedGroup : qAsConst(resolvedProducts.first()->groups)) {
+    for (const GroupPtr &resolvedGroup : qAsConst(resolvedProducts.front()->groups)) {
         if (resolvedGroup->name == groupName) {
             throw ErrorInfo(Tr::tr("Group '%1' already exists in product '%2'.")
                             .arg(groupName, product.name()), resolvedGroup->location);
         }
     }
 
-    ProjectFileGroupInserter groupInserter(products.first(), groupName);
+    ProjectFileGroupInserter groupInserter(products.front(), groupName);
     groupInserter.apply();
 
     m_projectData.d.detach(); // The data we already gave out must stay as it is.
@@ -354,7 +354,7 @@ void ProjectPrivate::addGroup(const ProductData &product, const QString &groupNa
     updateExternalCodeLocations(m_projectData, groupInserter.itemPosition(),
                                 groupInserter.lineOffset());
 
-    products = findProductsByName(products.first().name()); // These are new objects.
+    products = findProductsByName(products.front().name()); // These are new objects.
     QBS_CHECK(products.count() == resolvedProducts.count());
     for (int i = 0; i < products.count(); ++i) {
         const GroupPtr resolvedGroup = ResolvedGroup::create();
@@ -451,7 +451,7 @@ ProjectPrivate::FileListUpdateContext ProjectPrivate::getFileListContext(const P
             throw ErrorInfo(Tr::tr("File '%1' appears more than once.").arg(absPath));
         if (forAdding && !FileInfo(absPath).exists())
             throw ErrorInfo(Tr::tr("File '%1' does not exist.").arg(absPath));
-        if (matchesWildcard(absPath, groupContext.resolvedGroups.first())) {
+        if (matchesWildcard(absPath, groupContext.resolvedGroups.front())) {
             filesContext.absoluteFilePathsFromWildcards << absPath;
         } else {
             filesContext.absoluteFilePaths << absPath;
@@ -490,8 +490,8 @@ void ProjectPrivate::addFiles(const ProductData &product, const GroupData &group
         }
     }
 
-    ProjectFileFilesAdder adder(groupContext.products.first(),
-            group.isValid() ? groupContext.groups.first() : GroupData(),
+    ProjectFileFilesAdder adder(groupContext.products.front(),
+            group.isValid() ? groupContext.groups.front() : GroupData(),
             filesContext.relativeFilePaths);
     adder.apply();
 
@@ -559,7 +559,7 @@ void ProjectPrivate::removeFiles(const ProductData &product, const GroupData &gr
     }
     QStringList filesNotFound = filesContext.absoluteFilePaths;
     QList<SourceArtifactPtr> sourceArtifacts;
-    for (const SourceArtifactPtr &sa : qAsConst(groupContext.resolvedGroups.first()->files)) {
+    for (const SourceArtifactPtr &sa : qAsConst(groupContext.resolvedGroups.front()->files)) {
         if (filesNotFound.removeOne(sa->absoluteFilePath))
             sourceArtifacts << sa;
     }
@@ -568,8 +568,8 @@ void ProjectPrivate::removeFiles(const ProductData &product, const GroupData &gr
                         .arg(filesNotFound.join(QLatin1String(", "))));
     }
 
-    ProjectFileFilesRemover remover(groupContext.products.first(),
-            group.isValid() ? groupContext.groups.first() : GroupData(),
+    ProjectFileFilesRemover remover(groupContext.products.front(),
+            group.isValid() ? groupContext.groups.front() : GroupData(),
             filesContext.relativeFilePaths);
     remover.apply();
 
@@ -595,7 +595,7 @@ void ProjectPrivate::removeGroup(const ProductData &product, const GroupData &gr
 {
     GroupUpdateContext context = getGroupContext(product, group);
 
-    ProjectFileGroupRemover remover(context.products.first(), context.groups.first());
+    ProjectFileGroupRemover remover(context.products.front(), context.groups.front());
     remover.apply();
 
     for (int i = 0; i < context.resolvedProducts.count(); ++i) {
diff --git a/src/lib/corelib/api/projectfileupdater.cpp b/src/lib/corelib/api/projectfileupdater.cpp
index 942ab0efa..ced85e123 100644
--- a/src/lib/corelib/api/projectfileupdater.cpp
+++ b/src/lib/corelib/api/projectfileupdater.cpp
@@ -233,7 +233,7 @@ void ProjectFileGroupInserter::doApply(QString &fileContent, UiProgram *ast)
     int lineOffset = 3 + 1; // Our text + a leading newline that is always added by the rewriter.
     const QList<ChangeSet::EditOp> &editOps = changeSet.operationList();
     QBS_CHECK(editOps.count() == 1);
-    const ChangeSet::EditOp &insertOp = editOps.first();
+    const ChangeSet::EditOp &insertOp = editOps.front();
     setLineOffset(lineOffset);
 
     int insertionLine = fileContent.left(insertOp.pos1).count(QLatin1Char('\n'));
@@ -256,7 +256,7 @@ static const ChangeSet::EditOp &getEditOp(const ChangeSet &changeSet)
 {
     const QList<ChangeSet::EditOp> &editOps = changeSet.operationList();
     QBS_CHECK(editOps.count() == 1);
-    return editOps.first();
+    return editOps.front();
 }
 
 static int getLineOffsetForChangedBinding(const ChangeSet &changeSet, const QString &oldRhs)
@@ -345,9 +345,9 @@ void ProjectFileFilesAdder::doApply(QString &fileContent, UiProgram *ast)
             }
 
             // Insert new files "sorted", but do not change the order of existing files.
-            const QString firstNewFileRepr = toJSLiteral(sortedFiles.first());
+            const QString firstNewFileRepr = toJSLiteral(sortedFiles.front());
             while (!oldFileReprs.isEmpty()) {
-                if (oldFileReprs.first() > firstNewFileRepr)
+                if (oldFileReprs.front() > firstNewFileRepr)
                     break;
                 addToFilesRepr(filesRepresentation, oldFileReprs.takeFirst(), arrayElemIndentation);
             }
@@ -486,9 +486,9 @@ void ProjectFileFilesRemover::doApply(QString &fileContent, UiProgram *ast)
         }
         const QString existingFile
                 = static_cast<StringLiteral *>(exprStatement->expression)->value.toString();
-        if (existingFile != m_files.first()) {
+        if (existingFile != m_files.front()) {
             throw ErrorInfo(Tr::tr("File '%1' could not be found in the 'files' list.")
-                            .arg(m_files.first()), bindingLocation);
+                            .arg(m_files.front()), bindingLocation);
         }
         rewriter.changeBinding(itemFinder.item()->initializer, QLatin1String("files"),
                                QLatin1String("[]"), Rewriter::ScriptBinding);
@@ -539,7 +539,7 @@ void ProjectFileGroupRemover::doApply(QString &fileContent, UiProgram *ast)
     setItemPosition(m_group.location());
     const QList<ChangeSet::EditOp> &editOps = changeSet.operationList();
     QBS_CHECK(editOps.count() == 1);
-    const ChangeSet::EditOp &op = editOps.first();
+    const ChangeSet::EditOp &op = editOps.front();
     const QString removedText = fileContent.mid(op.pos1, op.length1);
     setLineOffset(-removedText.count(QLatin1Char('\n')));
 
diff --git a/src/lib/corelib/buildgraph/executor.cpp b/src/lib/corelib/buildgraph/executor.cpp
index 8913c5469..0d86142ef 100644
--- a/src/lib/corelib/buildgraph/executor.cpp
+++ b/src/lib/corelib/buildgraph/executor.cpp
@@ -257,7 +257,7 @@ void Executor::doBuild()
 
     InstallOptions installOptions;
     installOptions.setDryRun(m_buildOptions.dryRun());
-    installOptions.setInstallRoot(m_productsToBuild.first()->moduleProperties
+    installOptions.setInstallRoot(m_productsToBuild.front()->moduleProperties
                                   ->qbsPropertyValue(QLatin1String("installRoot")).toString());
     installOptions.setKeepGoing(m_buildOptions.keepGoing());
     m_productInstaller = new ProductInstaller(m_project, m_productsToBuild, installOptions,
diff --git a/src/lib/corelib/buildgraph/productinstaller.cpp b/src/lib/corelib/buildgraph/productinstaller.cpp
index 1b1e507bb..89e7c94a9 100644
--- a/src/lib/corelib/buildgraph/productinstaller.cpp
+++ b/src/lib/corelib/buildgraph/productinstaller.cpp
@@ -192,7 +192,7 @@ void ProductInstaller::copyFile(const Artifact *artifact)
 {
     if (m_observer->canceled()) {
         throw ErrorInfo(Tr::tr("Installation canceled for configuration '%1'.")
-                    .arg(m_products.first()->project->topLevelProject()->id()));
+                    .arg(m_products.front()->project->topLevelProject()->id()));
     }
 
     const QString targetFilePath = this->targetFilePath(m_project.get(),
diff --git a/src/lib/corelib/buildgraph/qtmocscanner.cpp b/src/lib/corelib/buildgraph/qtmocscanner.cpp
index 3251ff167..9f369bdd1 100644
--- a/src/lib/corelib/buildgraph/qtmocscanner.cpp
+++ b/src/lib/corelib/buildgraph/qtmocscanner.cpp
@@ -216,15 +216,15 @@ QScriptValue QtMocScanner::apply(QScriptEngine *engine, const Artifact *artifact
         QList<ScannerPlugin *> scanners = ScannerPluginManager::scannersForFileTag(m_tags.cpp);
         if (scanners.count() != 1)
             return scannerCountError(engine, scanners.count(), m_tags.cpp.toString());
-        m_cppScanner = scanners.first();
+        m_cppScanner = scanners.front();
         scanners = ScannerPluginManager::scannersForFileTag(m_tags.objcpp);
         if (scanners.count() != 1)
             return scannerCountError(engine, scanners.count(), m_tags.objcpp.toString());
-        m_objcppScanner = scanners.first();
+        m_objcppScanner = scanners.front();
         scanners = ScannerPluginManager::scannersForFileTag(m_tags.hpp);
         if (scanners.count() != 1)
             return scannerCountError(engine, scanners.count(), m_tags.hpp.toString());
-        m_hppScanner = scanners.first();
+        m_hppScanner = scanners.front();
     }
 
     findIncludedMocCppFiles();
diff --git a/src/lib/corelib/language/astimportshandler.cpp b/src/lib/corelib/language/astimportshandler.cpp
index c4c701f22..1f3c10a0f 100644
--- a/src/lib/corelib/language/astimportshandler.cpp
+++ b/src/lib/corelib/language/astimportshandler.cpp
@@ -87,8 +87,8 @@ void ASTImportsHandler::handleImport(const QbsQmlJS::AST::UiImport *import)
     bool isBase = false;
     if (import->importUri) {
         importUri = toStringList(import->importUri);
-        isBase = (importUri.size() == 1 && importUri.first() == QLatin1String("qbs"))
-                || (importUri.size() == 2 && importUri.first() == QLatin1String("qbs")
+        isBase = (importUri.size() == 1 && importUri.front() == QLatin1String("qbs"))
+                || (importUri.size() == 2 && importUri.front() == QLatin1String("qbs")
                     && importUri.last() == QLatin1String("base"));
         if (isBase) {
             checkImportVersion(import->versionToken);
@@ -105,7 +105,7 @@ void ASTImportsHandler::handleImport(const QbsQmlJS::AST::UiImport *import)
                         toCodeLocation(m_file->filePath(), import->importIdToken));
         }
     } else {
-        if (importUri.count() == 2 && importUri.first() == QLatin1String("qbs")) {
+        if (importUri.count() == 2 && importUri.front() == QLatin1String("qbs")) {
             const QString extensionName = importUri.last();
             if (JsExtensions::hasExtension(extensionName)) {
                 if (Q_UNLIKELY(!import->importId.isNull())) {
diff --git a/src/lib/corelib/language/itemreaderastvisitor.cpp b/src/lib/corelib/language/itemreaderastvisitor.cpp
index 9d77472c2..76bdc7ff0 100644
--- a/src/lib/corelib/language/itemreaderastvisitor.cpp
+++ b/src/lib/corelib/language/itemreaderastvisitor.cpp
@@ -195,7 +195,7 @@ bool ItemReaderASTVisitor::visit(AST::UiScriptBinding *ast)
 
     const QStringList bindingName = toStringList(ast->qualifiedId);
 
-    if (bindingName.length() == 1 && bindingName.first() == QLatin1String("id")) {
+    if (bindingName.length() == 1 && bindingName.front() == QLatin1String("id")) {
         const auto * const expStmt = AST::cast<AST::ExpressionStatement *>(ast->statement);
         if (Q_UNLIKELY(!expStmt))
             throw ErrorInfo(Tr::tr("id: must be followed by identifier"));
diff --git a/src/lib/corelib/language/loader.cpp b/src/lib/corelib/language/loader.cpp
index d7da2ca67..6926ed61f 100644
--- a/src/lib/corelib/language/loader.cpp
+++ b/src/lib/corelib/language/loader.cpp
@@ -204,7 +204,7 @@ void Loader::setupProjectFilePath(SetupProjectParameters &parameters)
         throw ErrorInfo(Tr::tr("More than one project file found in directory '%1'.")
                 .arg(projectFilePath));
     }
-    projectFilePath.append(QLatin1Char('/')).append(actualFileNames.first());
+    projectFilePath.append(QLatin1Char('/')).append(actualFileNames.front());
 
     projectFilePath = QDir::current().filePath(projectFilePath);
     projectFilePath = QDir::cleanPath(projectFilePath);
diff --git a/src/lib/corelib/language/moduleloader.cpp b/src/lib/corelib/language/moduleloader.cpp
index 1ee216100..9b683c5dd 100644
--- a/src/lib/corelib/language/moduleloader.cpp
+++ b/src/lib/corelib/language/moduleloader.cpp
@@ -1752,11 +1752,11 @@ void ModuleLoader::propagateModulesFromParent(ProductContext *productContext, It
         for (Item::Module depMod : oldModules) {
             depMod.item = moduleInstancesForGroup.value(depMod.name);
             adaptedModules << depMod;
-            if (depMod.name.first() == module.name.first())
+            if (depMod.name.front() == module.name.front())
                 continue;
-            const ItemValuePtr &modulePrefix = groupItem->itemProperty(depMod.name.first());
+            const ItemValuePtr &modulePrefix = groupItem->itemProperty(depMod.name.front());
             QBS_CHECK(modulePrefix);
-            module.item->setProperty(depMod.name.first(), modulePrefix);
+            module.item->setProperty(depMod.name.front(), modulePrefix);
         }
         module.item->setModules(adaptedModules);
     }
@@ -2114,7 +2114,7 @@ void ModuleLoader::resolveDependsItem(DependsContext *dependsContext, Item *pare
             ErrorInfo e(Tr::tr("Dependency '%1' not found for product '%2'.")
                         .arg(moduleName.toString(), dependsContext->product->name),
                         dependsItem->location());
-            if (moduleName.count() == 2 && moduleName.first() == QLatin1String("Qt")) {
+            if (moduleName.count() == 2 && moduleName.front() == QLatin1String("Qt")) {
                 e.append(Tr::tr("Please create a Qt profile using the qbs-setup-qt tool "
                                 "if you haven't already done so."));
             }
@@ -2355,7 +2355,7 @@ private:
 
 static bool isBaseModule(const QualifiedId &moduleName)
 {
-    return moduleName.count() == 1 && moduleName.first() == QLatin1String("qbs");
+    return moduleName.count() == 1 && moduleName.front() == QLatin1String("qbs");
 }
 
 class DelayedPropertyChanger
@@ -2419,7 +2419,7 @@ Item *ModuleLoader::loadModule(ProductContext *productContext, Item *exportingPr
 
     if (Q_UNLIKELY(moduleInstance->type() == ItemType::ModulePrefix)) {
         for (const Item::Module &m : item->modules()) {
-            if (m.name.first() == moduleName.first())
+            if (m.name.front() == moduleName.front())
                 throwModuleNamePrefixError(moduleName, m.name, dependsItemLocation);
         }
     }
@@ -2849,7 +2849,7 @@ void ModuleLoader::instantiateModule(ProductContext *productContext, Item *expor
         Item *item = moduleInstanceItem(moduleInstance, iip.first);
         item->setPrototype(iip.second->item());
         if (iip.second->createdByPropertiesBlock()) {
-            ItemValuePtr itemValue = moduleInstance->itemProperty(iip.first.first());
+            ItemValuePtr itemValue = moduleInstance->itemProperty(iip.first.front());
             for (int i = 1; i < iip.first.size(); ++i)
                 itemValue = itemValue->item()->itemProperty(iip.first.at(i));
             itemValue->setCreatedByPropertiesBlock(true);
diff --git a/src/lib/corelib/tools/applecodesignutils.cpp b/src/lib/corelib/tools/applecodesignutils.cpp
index f5f8b06fa..b77850a55 100644
--- a/src/lib/corelib/tools/applecodesignutils.cpp
+++ b/src/lib/corelib/tools/applecodesignutils.cpp
@@ -90,7 +90,7 @@ QVariantMap certificateInfo(const QByteArray &data)
     const auto subjectInfo = [](const QSslCertificate &cert) {
         QVariantMap map;
         for (const auto &attr : cert.subjectInfoAttributes())
-            map.insert(QString::fromLatin1(attr), cert.subjectInfo(attr).first());
+            map.insert(QString::fromLatin1(attr), cert.subjectInfo(attr).front());
         return map;
     };
 
diff --git a/src/lib/corelib/tools/scripttools.cpp b/src/lib/corelib/tools/scripttools.cpp
index 7f094f9bb..adf930cf0 100644
--- a/src/lib/corelib/tools/scripttools.cpp
+++ b/src/lib/corelib/tools/scripttools.cpp
@@ -49,9 +49,9 @@ namespace Internal {
 void setConfigProperty(QVariantMap &cfg, const QStringList &name, const QVariant &value)
 {
     if (name.length() == 1) {
-        cfg.insert(name.first(), value);
+        cfg.insert(name.front(), value);
     } else {
-        QVariant &subCfg = cfg[name.first()];
+        QVariant &subCfg = cfg[name.front()];
         QVariantMap subCfgMap = subCfg.toMap();
         setConfigProperty(subCfgMap, name.mid(1), value);
         subCfg = subCfgMap;
@@ -61,9 +61,9 @@ void setConfigProperty(QVariantMap &cfg, const QStringList &name, const QVariant
 QVariant getConfigProperty(const QVariantMap &cfg, const QStringList &name)
 {
     if (name.length() == 1)
-        return cfg.value(name.first());
+        return cfg.value(name.front());
     else
-        return getConfigProperty(cfg.value(name.first()).toMap(), name.mid(1));
+        return getConfigProperty(cfg.value(name.front()).toMap(), name.mid(1));
 }
 
 TemporaryGlobalObjectSetter::TemporaryGlobalObjectSetter(const QScriptValue &object)
diff --git a/src/lib/corelib/tools/settingsmodel.cpp b/src/lib/corelib/tools/settingsmodel.cpp
index ed52455ea..4544fa5d0 100644
--- a/src/lib/corelib/tools/settingsmodel.cpp
+++ b/src/lib/corelib/tools/settingsmodel.cpp
@@ -329,7 +329,7 @@ void SettingsModel::SettingsModelPrivate::readSettings()
     for (QVariantMap::ConstIterator it = additionalProperties.constBegin();
          it != additionalProperties.constEnd(); ++it) {
         const QStringList nameAsList = it.key().split(QLatin1Char('.'), QString::SkipEmptyParts);
-        addNode(&rootNode, nameAsList.first(), nameAsList.mid(1), it.value());
+        addNode(&rootNode, nameAsList.front(), nameAsList.mid(1), it.value());
     }
     dirty = false;
 }
@@ -371,7 +371,7 @@ void SettingsModel::SettingsModelPrivate::addNode(qbs::Internal::Node *parentNod
         currentNode->value = settingsValueToRepresentation(value);
         currentNode->isFromSettings = false;
     } else {
-        addNode(currentNode, restOfName.first(), restOfName.mid(1), value);
+        addNode(currentNode, restOfName.front(), restOfName.mid(1), value);
     }
 }
 
diff --git a/src/lib/corelib/tools/shellutils.cpp b/src/lib/corelib/tools/shellutils.cpp
index 4521e018c..c1992551f 100644
--- a/src/lib/corelib/tools/shellutils.cpp
+++ b/src/lib/corelib/tools/shellutils.cpp
@@ -54,7 +54,7 @@ QString shellInterpreter(const QString &filePath) {
         const QString shebang = ts.readLine();
         if (shebang.startsWith(QLatin1String("#!"))) {
             return (shebang.mid(2).split(QRegExp(QLatin1String("\\s")),
-                                         QString::SkipEmptyParts) << QString()).first();
+                                         QString::SkipEmptyParts) << QString()).front();
         }
     }
 
diff --git a/tests/auto/api/tst_api.cpp b/tests/auto/api/tst_api.cpp
index 6b64bc2ea..9d859880e 100644
--- a/tests/auto/api/tst_api.cpp
+++ b/tests/auto/api/tst_api.cpp
@@ -295,7 +295,7 @@ void TestApi::buildErrorCodeLocation()
     const qbs::ErrorInfo errorInfo
             = doBuildProject("build-error-code-location/build-error-code-location.qbs");
     QVERIFY(errorInfo.hasError());
-    const qbs::ErrorItem errorItem = errorInfo.items().first();
+    const qbs::ErrorItem errorItem = errorInfo.items().front();
     QCOMPARE(errorItem.description(),
              QString("Rule.outputArtifacts must return an array of objects."));
     const qbs::CodeLocation errorLoc = errorItem.codeLocation();
@@ -657,7 +657,7 @@ void TestApi::changeContent()
     qbs::Project project = job->project();
     qbs::ProjectData projectData = project.projectData();
     QCOMPARE(projectData.allProducts().count(), 1);
-    qbs::ProductData product = projectData.allProducts().first();
+    qbs::ProductData product = projectData.allProducts().front();
     QVERIFY(product.groups().count() >= 8);
 
     // Error handling: Invalid product.
@@ -690,7 +690,7 @@ void TestApi::changeContent()
     // Add files to empty array literal.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     QVERIFY(product.groups().count() >= 10);
     qbs::GroupData group = findGroup(product, "New Group 1");
     QVERIFY(group.isValid());
@@ -700,7 +700,7 @@ void TestApi::changeContent()
     // Error handling: Add the same file again.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     QVERIFY(product.groups().count() >= 10);
     group = findGroup(product, "New Group 1");
     QVERIFY(group.isValid());
@@ -715,7 +715,7 @@ void TestApi::changeContent()
     // Error handling: Try to remove the same file again.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     QVERIFY(product.groups().count() >= 10);
     group = findGroup(product, "New Group 1");
     QVERIFY(group.isValid());
@@ -737,7 +737,7 @@ void TestApi::changeContent()
     // Add file to non-empty array literal.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Existing Group 1");
     QVERIFY(group.isValid());
     errorInfo = project.addFiles(product, group, QStringList() << "newfile1.txt");
@@ -746,14 +746,14 @@ void TestApi::changeContent()
     // Add files to list represented as a single string.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     errorInfo = project.addFiles(product, qbs::GroupData(), QStringList() << "newfile2.txt");
     VERIFY_NO_ERROR(errorInfo);
 
     // Add files to list represented as an identifier.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Existing Group 2");
     QVERIFY(group.isValid());
     errorInfo = project.addFiles(product, group, QStringList() << "newfile3.txt");
@@ -762,7 +762,7 @@ void TestApi::changeContent()
     // Add files to list represented as a block of code (not yet implemented).
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Existing Group 3");
     QVERIFY(group.isValid());
     errorInfo = project.addFiles(product, group, QStringList() << "newfile4.txt");
@@ -772,7 +772,7 @@ void TestApi::changeContent()
     // Add file to group with directory prefix.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Existing Group 4");
     QVERIFY(group.isValid());
     errorInfo = project.addFiles(product, group, QStringList() << "file.txt");
@@ -781,7 +781,7 @@ void TestApi::changeContent()
     // Error handling: Add file to group with non-directory prefix.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Existing Group 5");
     QVERIFY(group.isValid());
     errorInfo = project.addFiles(product, group, QStringList() << "newfile1.txt");
@@ -791,14 +791,14 @@ void TestApi::changeContent()
     // Remove group.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Existing Group 5");
     QVERIFY(group.isValid());
     errorInfo = project.removeGroup(product, group);
     VERIFY_NO_ERROR(errorInfo);
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    QVERIFY(projectData.products().first().groups().count() >= 9);
+    QVERIFY(projectData.products().front().groups().count() >= 9);
 
     // Error handling: Try to remove the same group again.
     errorInfo = project.removeGroup(product, group);
@@ -808,7 +808,7 @@ void TestApi::changeContent()
     // Add a file to a group where the file name is already matched by a wildcard.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Group with wildcards");
     QVERIFY(group.isValid());
     QFile newFile("koerper.klaus");
@@ -818,17 +818,17 @@ void TestApi::changeContent()
     VERIFY_NO_ERROR(errorInfo);
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Group with wildcards");
     QVERIFY(group.isValid());
     QCOMPARE(group.sourceArtifactsFromWildcards().count(), 1);
-    QCOMPARE(group.sourceArtifactsFromWildcards().first().filePath(),
+    QCOMPARE(group.sourceArtifactsFromWildcards().front().filePath(),
              QFileInfo(newFile).absoluteFilePath());
 
     // Error checking: Try to remove a file that originates from a wildcard pattern.
     projectData = project.projectData();
     QVERIFY(projectData.products().count() == 1);
-    product = projectData.products().first();
+    product = projectData.products().front();
     group = findGroup(product, "Other group with wildcards");
     QVERIFY(group.isValid());
     errorInfo = project.removeFiles(product, group, QStringList() << "test.wildcard");
@@ -861,7 +861,7 @@ void TestApi::changeContent()
     // not having run yet.
     bool projectDataMatches = newProjectData.products().count() == 1
             && projectData.products().count() == 1
-            && newProjectData.products().first().groups() == projectData.products().first().groups();
+            && newProjectData.products().front().groups() == projectData.products().front().groups();
     if (!projectDataMatches) {
         qDebug("This is the assumed project:");
         printProjectData(projectData);
@@ -884,11 +884,11 @@ void TestApi::changeContent()
 
     // Error handling: Try to change the project during a build.
     buildJob.reset(project.buildAllProducts(buildOptions, defaultProducts(), this));
-    errorInfo = project.addGroup(newProjectData.products().first(), "blubb");
+    errorInfo = project.addGroup(newProjectData.products().front(), "blubb");
     QVERIFY(errorInfo.hasError());
     QVERIFY2(errorInfo.toString().contains("in process"), qPrintable(errorInfo.toString()));
     waitForFinished(buildJob.get());
-    errorInfo = project.addGroup(newProjectData.products().first(), "blubb");
+    errorInfo = project.addGroup(newProjectData.products().front(), "blubb");
     VERIFY_NO_ERROR(errorInfo);
 
     project = qbs::Project();
@@ -905,7 +905,7 @@ void TestApi::changeContent()
     project = job->project();
     projectData = project.projectData();
     QCOMPARE(projectData.allProducts().count(), 1);
-    product = projectData.allProducts().first();
+    product = projectData.allProducts().front();
     errorInfo = project.addFiles(product, qbs::GroupData(), QStringList("main.cpp"));
     VERIFY_NO_ERROR(errorInfo);
     projectData = project.projectData();
@@ -924,7 +924,7 @@ void TestApi::changeContent()
     newProjectData = job->project().projectData();
     projectDataMatches = newProjectData.products().count() == 1
             && projectData.products().count() == 1
-            && newProjectData.products().first().groups() == projectData.products().first().groups();
+            && newProjectData.products().front().groups() == projectData.products().front().groups();
     if (!projectDataMatches) {
         printProjectData(projectData);
         qDebug("\n====\n");
@@ -945,7 +945,7 @@ void TestApi::commandExtraction()
     qbs::Project project = setupJob->project();
     qbs::ProjectData projectData = project.projectData();
     QCOMPARE(projectData.allProducts().count(), 1);
-    qbs::ProductData productData = projectData.allProducts().first();
+    qbs::ProductData productData = projectData.allProducts().front();
     qbs::ErrorInfo errorInfo;
     const QString projectDirPath = QDir::cleanPath(QFileInfo(setupParams.projectFilePath()).path());
     const QString sourceFilePath = projectDirPath + "/main.cpp";
@@ -964,14 +964,14 @@ void TestApi::commandExtraction()
     QVERIFY2(!buildJob->error().hasError(), qPrintable(buildJob->error().toString()));
     projectData = project.projectData();
     QCOMPARE(projectData.allProducts().count(), 1);
-    productData = projectData.allProducts().first();
+    productData = projectData.allProducts().front();
     errorInfo = qbs::ErrorInfo();
 
     // After the build, the compile command must be found.
     commands = project.ruleCommands(productData, sourceFilePath, "obj", &errorInfo);
     QCOMPARE(commands.count(), 1);
     QVERIFY2(!errorInfo.hasError(), qPrintable(errorInfo.toString()));
-    const qbs::RuleCommand command = commands.first();
+    const qbs::RuleCommand command = commands.front();
     QCOMPARE(command.type(), qbs::RuleCommand::ProcessCommandType);
     QVERIFY(!command.executable().isEmpty());
     QVERIFY(!command.arguments().isEmpty());
@@ -1042,7 +1042,7 @@ void TestApi::errorInSetupRunEnvironment()
     const qbs::Project project = job->project();
     QVERIFY(project.isValid());
     QCOMPARE(project.projectData().products().count(), 1);
-    const qbs::ProductData product = project.projectData().products().first();
+    const qbs::ProductData product = project.projectData().products().front();
 
     bool exceptionCaught = false;
     try {
@@ -1083,14 +1083,14 @@ void TestApi::disabledInstallGroup()
 
     qbs::ProjectData projectData = project.projectData();
     QCOMPARE(projectData.allProducts().count(), 1);
-    qbs::ProductData product = projectData.allProducts().first();
+    qbs::ProductData product = projectData.allProducts().front();
     const QList<qbs::ArtifactData> targets = product.targetArtifacts();
     QCOMPARE(targets.count(), 1);
-    QVERIFY(targets.first().isGenerated());
-    QVERIFY(targets.first().isExecutable());
-    QVERIFY(targets.first().isTargetArtifact());
+    QVERIFY(targets.front().isGenerated());
+    QVERIFY(targets.front().isExecutable());
+    QVERIFY(targets.front().isTargetArtifact());
     QCOMPARE(projectData.installableArtifacts().count(), 0);
-    QCOMPARE(product.targetExecutable(), targets.first().filePath());
+    QCOMPARE(product.targetExecutable(), targets.front().filePath());
 }
 
 void TestApi::disabledProduct()
@@ -1205,10 +1205,10 @@ void TestApi::fileTagsFilterOverride()
 
     qbs::ProjectData projectData = project.projectData();
     QCOMPARE(projectData.allProducts().count(), 1);
-    const qbs::ProductData product = projectData.allProducts().first();
+    const qbs::ProductData product = projectData.allProducts().front();
     QList<qbs::ArtifactData> installableFiles = product.installableArtifacts();
     QCOMPARE(installableFiles.count(), 1);
-    QVERIFY(installableFiles.first().installData().installFilePath().contains("habicht"));
+    QVERIFY(installableFiles.front().installData().installFilePath().contains("habicht"));
 }
 
 void TestApi::generatedFilesList()
@@ -1227,7 +1227,7 @@ void TestApi::generatedFilesList()
     VERIFY_NO_ERROR(buildJob->error());
     const qbs::ProjectData projectData = project.projectData();
     QCOMPARE(projectData.products().count(), 1);
-    const qbs::ProductData product = projectData.products().first();
+    const qbs::ProductData product = projectData.products().front();
     QString uiFilePath;
     QVERIFY(product.generatedArtifacts().count() >= 6);
     foreach (const qbs::ArtifactData &a, product.generatedArtifacts()) {
@@ -1258,7 +1258,7 @@ void TestApi::generatedFilesList()
     QVERIFY(!uiFilePath.isEmpty());
     const QStringList directParents = project.generatedFiles(product, uiFilePath, false);
     QCOMPARE(directParents.count(), 1);
-    const QFileInfo uiHeaderFileInfo(directParents.first());
+    const QFileInfo uiHeaderFileInfo(directParents.front());
     QCOMPARE(uiHeaderFileInfo.fileName(), QLatin1String("ui_mainwindow.h"));
     QVERIFY(!uiHeaderFileInfo.exists());
     const QStringList allParents = project.generatedFiles(product, uiFilePath, true);
@@ -1373,12 +1373,12 @@ void TestApi::installableFiles()
     project = job->project();
     projectData = project.projectData();
     QCOMPARE(projectData.allProducts().count(), 1);
-    product = projectData.allProducts().first();
+    product = projectData.allProducts().front();
     installableFiles = product.installableArtifacts();
     QCOMPARE(installableFiles.count(), 2);
     foreach (const qbs::ArtifactData &f, installableFiles)
         QVERIFY(!f.isExecutable());
-    QCOMPARE(installableFiles.first().installData().localInstallFilePath(),
+    QCOMPARE(installableFiles.front().installData().localInstallFilePath(),
              QLatin1String("/tmp/dir/file1.txt"));
     QCOMPARE(installableFiles.last().installData().localInstallFilePath(),
              QLatin1String("/tmp/dir/file2.txt"));
@@ -1621,9 +1621,9 @@ void TestApi::missingSourceFile()
     QVERIFY2(!job->error().hasError(), qPrintable(job->error().toString()));
     qbs::ProjectData project = job->project().projectData();
     QCOMPARE(project.allProducts().count(), 1);
-    qbs::ProductData product = project.allProducts().first();
+    qbs::ProductData product = project.allProducts().front();
     QCOMPARE(product.groups().count(), 1);
-    qbs::GroupData group = product.groups().first();
+    qbs::GroupData group = product.groups().front();
     QCOMPARE(group.allSourceArtifacts().count(), 2);
 
     QFile::rename("file2.txt.missing", "file2.txt");
@@ -1632,9 +1632,9 @@ void TestApi::missingSourceFile()
     QVERIFY2(!job->error().hasError(), qPrintable(job->error().toString()));
     project = job->project().projectData();
     QCOMPARE(project.allProducts().count(), 1);
-    product = project.allProducts().first();
+    product = project.allProducts().front();
     QCOMPARE(product.groups().count(), 1);
-    group = product.groups().first();
+    group = product.groups().front();
     QCOMPARE(group.allSourceArtifacts().count(), 3);
 }
 
@@ -1699,9 +1699,9 @@ void TestApi::multiArch()
     }
     QCOMPARE(hostProducts.count(), 2);
     QCOMPARE(targetProducts.count(), 1);
-    QCOMPARE(targetProducts.first().name(), QLatin1String("p1"));
+    QCOMPARE(targetProducts.front().name(), QLatin1String("p1"));
     QStringList hostProductNames
-            = QStringList() << hostProducts.first().name() << hostProducts.last().name();
+            = QStringList() << hostProducts.front().name() << hostProducts.last().name();
     QCOMPARE(hostProductNames.count("p1"), 1);
     QCOMPARE(hostProductNames.count("p2"), 1);
 
@@ -2095,12 +2095,12 @@ void TestApi::projectDataAfterProductInvalidation()
     qbs::Project project = setupJob->project();
     QVERIFY(project.isValid());
     QCOMPARE(project.projectData().products().count(), 1);
-    QVERIFY(project.projectData().products().first().generatedArtifacts().isEmpty());
+    QVERIFY(project.projectData().products().front().generatedArtifacts().isEmpty());
     std::unique_ptr<qbs::BuildJob> buildJob(project.buildAllProducts(qbs::BuildOptions()));
     waitForFinished(buildJob.get());
     QVERIFY2(!buildJob->error().hasError(), qPrintable(buildJob->error().toString()));
     QCOMPARE(project.projectData().products().count(), 1);
-    const qbs::ProductData productAfterBulding = project.projectData().products().first();
+    const qbs::ProductData productAfterBulding = project.projectData().products().front();
     QVERIFY(!productAfterBulding.generatedArtifacts().isEmpty());
     QFile projectFile(setupParams.projectFilePath());
     WAIT_FOR_NEW_TIMESTAMP();
@@ -2118,13 +2118,13 @@ void TestApi::projectDataAfterProductInvalidation()
     project = setupJob->project();
     QVERIFY(project.isValid());
     QCOMPARE(project.projectData().products().count(), 1);
-    QVERIFY(project.projectData().products().first().generatedArtifacts()
+    QVERIFY(project.projectData().products().front().generatedArtifacts()
             == productAfterBulding.generatedArtifacts());
     buildJob.reset(project.buildAllProducts(qbs::BuildOptions()));
     waitForFinished(buildJob.get());
     QVERIFY2(!buildJob->error().hasError(), qPrintable(buildJob->error().toString()));
     QCOMPARE(project.projectData().products().count(), 1);
-    QVERIFY(project.projectData().products().first().generatedArtifacts()
+    QVERIFY(project.projectData().products().front().generatedArtifacts()
             != productAfterBulding.generatedArtifacts());
 }
 
@@ -2362,7 +2362,7 @@ void TestApi::references()
     const qbs::ProjectData topLevelProject = job->project().projectData();
     QCOMPARE(topLevelProject.subProjects().count(), 1);
     const QString subProjectFileName
-            = QFileInfo(topLevelProject.subProjects().first().location().filePath()).fileName();
+            = QFileInfo(topLevelProject.subProjects().front().location().filePath()).fileName();
     QCOMPARE(subProjectFileName, QString("p.qbs"));
 }
 
@@ -2576,7 +2576,7 @@ void TestApi::sourceFileInBuildDir()
     QVERIFY2(!job->error().hasError(), qPrintable(job->error().toString()));
     const qbs::ProjectData projectData = job->project().projectData();
     QCOMPARE(projectData.allProducts().count(), 1);
-    const qbs::ProductData product = projectData.allProducts().first();
+    const qbs::ProductData product = projectData.allProducts().front();
     QCOMPARE(product.profile(), profileName());
     const qbs::GroupData group = findGroup(product, "the group");
     QVERIFY(group.isValid());
@@ -2650,7 +2650,7 @@ void TestApi::toolInModule()
     const qbs::ProjectData projectData = project.projectData();
     const QList<qbs::ProductData> products = projectData.products();
     QCOMPARE(products.count(), 1);
-    const qbs::ProductData product = products.first();
+    const qbs::ProductData product = products.front();
     for (const qbs::GroupData &group : product.groups())
         QVERIFY(group.name() != "thetool binary");
     const std::unique_ptr<qbs::BuildJob> buildJob(setupJob->project()
diff --git a/tests/auto/cmdlineparser/tst_cmdlineparser.cpp b/tests/auto/cmdlineparser/tst_cmdlineparser.cpp
index 0b6963c67..333d949e2 100644
--- a/tests/auto/cmdlineparser/tst_cmdlineparser.cpp
+++ b/tests/auto/cmdlineparser/tst_cmdlineparser.cpp
@@ -105,19 +105,19 @@ private slots:
         // Second "global" profile overwrites first.
         QVERIFY(parser.parseCommandLine(QStringList() << "profile:a" << m_fileArgs << "profile:b"));
         QCOMPARE(parser.buildConfigurations().count(), 1);
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.profile").toString(), QLatin1String("b"));
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.profile").toString(), QLatin1String("b"));
 
         // Second build configuration-specific profile overwrites first.
         QVERIFY(parser.parseCommandLine(QStringList(m_fileArgs) << "config:debug" << "profile:a"
                                         << "profile:b"));
         QCOMPARE(parser.buildConfigurations().count(), 1);
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.profile").toString(), QLatin1String("b"));
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.profile").toString(), QLatin1String("b"));
 
         QVERIFY(parser.parseCommandLine(QStringList(m_fileArgs) << "config:a-debug" << "profile:a"
                                         << "config:b-debug" << "profile:b"));
         QCOMPARE(parser.buildConfigurations().count(), 2);
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.configurationName").toString(), QLatin1String("a-debug"));
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.profile").toString(), QLatin1String("a"));
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.configurationName").toString(), QLatin1String("a-debug"));
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.profile").toString(), QLatin1String("a"));
         QCOMPARE(parser.buildConfigurations().at(1).value("qbs.configurationName").toString(), QLatin1String("b-debug"));
         QCOMPARE(parser.buildConfigurations().at(1).value("qbs.profile").toString(), QLatin1String("b"));
 
@@ -129,8 +129,8 @@ private slots:
         QVERIFY(parser.parseCommandLine(QStringList() << "config:debug" << "profile:a"
                                         << "config:release" << "profile:b" << m_fileArgs));
         QCOMPARE(parser.buildConfigurations().count(), 2);
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.configurationName").toString(), QLatin1String("debug"));
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.profile").toString(), QLatin1String("a"));
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.configurationName").toString(), QLatin1String("debug"));
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.profile").toString(), QLatin1String("a"));
         QCOMPARE(parser.buildConfigurations().at(1).value("qbs.configurationName").toString(), QLatin1String("release"));
         QCOMPARE(parser.buildConfigurations().at(1).value("qbs.profile").toString(), QLatin1String("b"));
 
@@ -138,8 +138,8 @@ private slots:
         QVERIFY(parser.parseCommandLine(QStringList(m_fileArgs) << "profile:a" << "config:debug"
                                         << "profile:b"));
         QCOMPARE(parser.buildConfigurations().count(), 1);
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.configurationName").toString(), QLatin1String("debug"));
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.profile").toString(), QLatin1String("b"));
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.configurationName").toString(), QLatin1String("debug"));
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.profile").toString(), QLatin1String("b"));
 
         // Digits are always handled as option parameters.
         QVERIFY(parser.parseCommandLine(QStringList(m_fileArgs) << "-j" << "123"));
@@ -152,14 +152,14 @@ private slots:
                                         << "-j123"));
         QCOMPARE(parser.command(), RunCommandType);
         QCOMPARE(parser.buildOptions(QString()).maxJobCount(), 123);
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.configurationName").toString(),
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.configurationName").toString(),
                  QLatin1String("custom"));
         QVERIFY(parser.runArgs().empty());
         QVERIFY(parser.parseCommandLine(QStringList("run") << m_fileArgs << "-j" << "123" << "--"
                 << "config:custom"));
         QCOMPARE(parser.command(), RunCommandType);
         QCOMPARE(parser.buildOptions(QString()).maxJobCount(), 123);
-        QCOMPARE(parser.buildConfigurations().first().value("qbs.configurationName").toString(),
+        QCOMPARE(parser.buildConfigurations().front().value("qbs.configurationName").toString(),
                  QLatin1String("default"));
         QCOMPARE(parser.runArgs(), QStringList({"config:custom"}));
 
diff --git a/tests/auto/language/tst_language.cpp b/tests/auto/language/tst_language.cpp
index e2e8d9409..20e0c1703 100644
--- a/tests/auto/language/tst_language.cpp
+++ b/tests/auto/language/tst_language.cpp
@@ -296,7 +296,7 @@ void TestLanguage::chainedProbes()
         const TopLevelProjectConstPtr project = loader->loadProject(parameters);
         QVERIFY(!!project);
         QCOMPARE(project->products.count(), 1);
-        const QString prop2Val = project->products.first()->moduleProperties
+        const QString prop2Val = project->products.front()->moduleProperties
                 ->moduleProperty("m", "prop2").toString();
         QCOMPARE(prop2Val, QLatin1String("probe1Valprobe2Val"));
     } catch (const ErrorInfo &e) {
@@ -595,11 +595,11 @@ void TestLanguage::enumerateProjectProperties()
         QVERIFY(!!project);
         auto products = productsFromProject(project);
         QCOMPARE(products.count(), 1);
-        auto product = products.values().first();
-        auto files = product->groups.first()->allFiles();
+        auto product = products.values().front();
+        auto files = product->groups.front()->allFiles();
         QCOMPARE(product->groups.count(), 1);
         QCOMPARE(files.count(), 1);
-        auto fileName = FileInfo::fileName(files.first()->absoluteFilePath);
+        auto fileName = FileInfo::fileName(files.front()->absoluteFilePath);
         QCOMPARE(fileName, QString("dummy.txt"));
     } catch (const ErrorInfo &e) {
         exceptionCaught = true;
@@ -1381,7 +1381,7 @@ void TestLanguage::jsImportUsedInMultipleScopes()
         QVERIFY(!!project);
         QHash<QString, ResolvedProductPtr> products = productsFromProject(project);
         QCOMPARE(products.count(), 1);
-        ResolvedProductPtr product = products.values().first();
+        ResolvedProductPtr product = products.values().front();
         QVERIFY(!!product);
         QCOMPARE(product->name, expectedProductName);
     }
@@ -1886,14 +1886,14 @@ void TestLanguage::outerInGroup()
         QVERIFY(!!group);
         QCOMPARE(group->name, product->name);
         QCOMPARE(group->files.count(), 1);
-        SourceArtifactConstPtr artifact = group->files.first();
+        SourceArtifactConstPtr artifact = group->files.front();
         QVariant installDir = artifact->properties->qbsPropertyValue("installDir");
         QCOMPARE(installDir.toString(), QString("/somewhere"));
         group = product->groups.at(1);
         QVERIFY(!!group);
         QCOMPARE(group->name, QString("Special Group"));
         QCOMPARE(group->files.count(), 1);
-        artifact = group->files.first();
+        artifact = group->files.front();
         installDir = artifact->properties->qbsPropertyValue("installDir");
         QCOMPARE(installDir.toString(), QString("/somewhere/else"));
     }
@@ -1916,7 +1916,7 @@ void TestLanguage::overriddenPropertiesAndPrototypes()
         TopLevelProjectConstPtr project = loader->loadProject(params);
         QVERIFY(!!project);
         QCOMPARE(project->products.count(), 1);
-        QCOMPARE(project->products.first()->moduleProperties->moduleProperty(
+        QCOMPARE(project->products.front()->moduleProperties->moduleProperty(
                      "multiple-backends", "prop").toString(), backendName);
     }
     catch (const ErrorInfo &e) {
@@ -2004,12 +2004,12 @@ void TestLanguage::profileValuesAndOverriddenValues()
         QVariantList values;
         values = product->moduleProperties->moduleProperty("dummy", "cxxFlags").toList();
         QCOMPARE(values.length(), 1);
-        QCOMPARE(values.first().toString(), QString("IN_PROFILE"));
+        QCOMPARE(values.front().toString(), QString("IN_PROFILE"));
         values = product->moduleProperties->moduleProperty("dummy", "defines").toList();
         QCOMPARE(values, QVariantList() << QLatin1String("IN_FILE") << QLatin1String("IN_PROFILE"));
         values = product->moduleProperties->moduleProperty("dummy", "cFlags").toList();
         QCOMPARE(values.length(), 1);
-        QCOMPARE(values.first().toString(), QString("OVERRIDDEN"));
+        QCOMPARE(values.front().toString(), QString("OVERRIDDEN"));
     } catch (const ErrorInfo &e) {
         exceptionCaught = true;
         qDebug() << e.toString();
@@ -2261,7 +2261,7 @@ void TestLanguage::propertiesBlockInGroup()
         const TopLevelProjectPtr project = loader->loadProject(defaultParameters);
         QVERIFY(!!project);
         QCOMPARE(project->allProducts().count(), 1);
-        const ResolvedProductConstPtr product = project->allProducts().first();
+        const ResolvedProductConstPtr product = project->allProducts().front();
         const auto groupIt = std::find_if(product->groups.constBegin(), product->groups.constEnd(),
                 [](const GroupConstPtr &g) { return g->name == "the group"; });
         QVERIFY(groupIt != product->groups.constEnd());
@@ -2376,8 +2376,8 @@ void TestLanguage::relaxedErrorMode()
         const ResolvedProductConstPtr missingFile = productMap.value("missing file");
         QVERIFY(missingFile->enabled);
         QCOMPARE(missingFile->groups.count(), 1);
-        QVERIFY(missingFile->groups.first()->enabled);
-        QCOMPARE(missingFile->groups.first()->allFiles().count(), 2);
+        QVERIFY(missingFile->groups.front()->enabled);
+        QCOMPARE(missingFile->groups.front()->allFiles().count(), 2);
         const ResolvedProductConstPtr fine = productMap.value("fine");
         QVERIFY(fine->enabled);
         QCOMPARE(fine->allFiles().count(), 1);
@@ -2530,7 +2530,7 @@ void TestLanguage::fileTags()
     GroupPtr group = product->groups.last();
     QVERIFY(!!group);
     QCOMPARE(group->files.count(), 1);
-    SourceArtifactConstPtr sourceFile = group->files.first();
+    SourceArtifactConstPtr sourceFile = group->files.front();
     QStringList fileTags = sourceFile->fileTags.toStringList();
     fileTags.sort();
     QCOMPARE(fileTags, expectedFileTags);
@@ -2753,7 +2753,7 @@ void TestLanguage::wildcards()
             }
         } else {
             QCOMPARE(product->groups.count(), HostOsInfo::isMacosHost() ? 2 : 1);
-            group = product->groups.first();
+            group = product->groups.front();
         }
         QVERIFY(!!group);
         QCOMPARE(group->files.count(), 0);
diff --git a/tests/benchmarker/commandlineparser.cpp b/tests/benchmarker/commandlineparser.cpp
index f33fdcaf4..115288f11 100644
--- a/tests/benchmarker/commandlineparser.cpp
+++ b/tests/benchmarker/commandlineparser.cpp
@@ -75,9 +75,9 @@ void CommandLineParser::parse()
             << oldCommitOption << newCommitOption << testProjectOption << qbsRepoOption;
     foreach (const QCommandLineOption &o, mandatoryOptions) {
         if (!parser.isSet(o))
-            throwException(o.names().first(), parser.helpText());
+            throwException(o.names().front(), parser.helpText());
         if (parser.value(o).isEmpty())
-            throwException(o.names().first(), QString(), parser.helpText());
+            throwException(o.names().front(), QString(), parser.helpText());
     }
     m_oldCommit = parser.value(oldCommitOption);
     m_newCommit = parser.value(newCommitOption);
@@ -96,7 +96,7 @@ void CommandLineParser::parse()
         } else if (activityString == nullBuildActivity()) {
             m_activities |= ActivityNullBuild;
         } else {
-            throwException(activitiesOption.names().first(), activityString, parser.helpText());
+            throwException(activitiesOption.names().front(), activityString, parser.helpText());
         }
     }
     m_regressionThreshold = 5;