GitPlugin: Simplify return statements

Change-Id: If09c93acade749326b95bb1c6068b2d43a4d8551
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/branchmodel.cpp

@@ -264,22 +264,22 @@ BranchModel::~BranchModel()
 QModelIndex BranchModel::index(int row, int column, const QModelIndex &parentIdx) const
 {
     if (column > 1)
-        return QModelIndex();
+        return {};
     BranchNode *parentNode = indexToNode(parentIdx);
 
     if (row >= parentNode->count())
-        return QModelIndex();
+        return {};
     return nodeToIndex(parentNode->children.at(row), column);
 }
 
 QModelIndex BranchModel::parent(const QModelIndex &index) const
 {
     if (!index.isValid())
-        return QModelIndex();
+        return {};
 
     BranchNode *node = indexToNode(index);
     if (node->parent == d->rootNode)
-        return QModelIndex();
+        return {};
     return nodeToIndex(node->parent, ColumnBranch);
 }
 
@@ -304,7 +304,7 @@ QVariant BranchModel::data(const QModelIndex &index, int role) const
 
     BranchNode *node = indexToNode(index);
     if (!node)
-        return QVariant();
+        return {};
 
     switch (role) {
     case Qt::DisplayRole: {
@@ -330,7 +330,7 @@ QVariant BranchModel::data(const QModelIndex &index, int role) const
         return index.column() == 0 ? node->fullRef() : QVariant();
     case Qt::ToolTipRole:
         if (!node->isLeaf())
-            return QVariant();
+            return {};
         if (node->toolTip.isEmpty())
             node->toolTip = toolTip(node->sha);
         return node->toolTip;
@@ -346,7 +346,7 @@ QVariant BranchModel::data(const QModelIndex &index, int role) const
         return font;
     }
     default:
-        return QVariant();
+        return {};
     }
 }
 
@@ -524,17 +524,17 @@ FilePath BranchModel::workingDirectory() const
 QModelIndex BranchModel::currentBranch() const
 {
     if (!d->currentBranch)
-        return QModelIndex();
+        return {};
     return nodeToIndex(d->currentBranch, ColumnBranch);
 }
 
 QString BranchModel::fullName(const QModelIndex &idx, bool includePrefix) const
 {
     if (!idx.isValid())
-        return QString();
+        return {};
     BranchNode *node = indexToNode(idx);
     if (!node || !node->isLeaf())
-        return QString();
+        return {};
     if (node == d->headNode)
         return QString("HEAD");
     return node->fullRef(includePrefix);
@@ -550,7 +550,7 @@ QStringList BranchModel::localBranchNames() const
 QString BranchModel::sha(const QModelIndex &idx) const
 {
     if (!idx.isValid())
-        return QString();
+        return {};
     BranchNode *node = indexToNode(idx);
     return node->sha;
 }
@@ -558,13 +558,11 @@ QString BranchModel::sha(const QModelIndex &idx) const
 QDateTime BranchModel::dateTime(const QModelIndex &idx) const
 {
     if (!idx.isValid())
-        return QDateTime();
+        return {};
     BranchNode *node = indexToNode(idx);
     return node->dateTime;
 }
 
-
-
 bool BranchModel::isHead(const QModelIndex &idx) const
 {
     if (!idx.isValid())
@@ -679,7 +677,7 @@ static int positionForName(BranchNode *node, const QString &name)
 QModelIndex BranchModel::addBranch(const QString &name, bool track, const QModelIndex &startPoint)
 {
     if (!d->rootNode || !d->rootNode->count())
-        return QModelIndex();
+        return {};
 
     const QString trackedBranch = fullName(startPoint);
     const QString fullTrackedBranch = fullName(startPoint, true);
@@ -705,7 +703,7 @@ QModelIndex BranchModel::addBranch(const QString &name, bool track, const QModel
 
     if (!gitClient().synchronousBranchCmd(d->workingDirectory, args, &output, &errorMessage)) {
         VcsOutputWindow::appendError(errorMessage);
-        return QModelIndex();
+        return {};
     }
 
     BranchNode *local = d->rootNode->children.at(LocalBranches);
@@ -761,7 +759,7 @@ std::optional<QString> BranchModel::remoteName(const QModelIndex &idx) const
     if (!node)
         return std::nullopt;
     if (node == remotesNode)
-        return QString();
+        return {};
     if (node->parent == remotesNode)
         return node->name;
     return std::nullopt;
@@ -888,7 +886,7 @@ BranchNode *BranchModel::indexToNode(const QModelIndex &index) const
 QModelIndex BranchModel::nodeToIndex(BranchNode *node, int column) const
 {
     if (node == d->rootNode)
-        return QModelIndex();
+        return {};
     return createIndex(node->parent->rowOf(node), column, static_cast<void *>(node));
 }
 

src/plugins/git/branchview.cpp

@@ -333,7 +333,7 @@ QModelIndex BranchView::selectedIndex()
 {
     QModelIndexList selected = m_branchView->selectionModel()->selectedIndexes();
     if (selected.isEmpty())
-        return QModelIndex();
+        return {};
     return m_filterModel->mapToSource(selected.at(0));
 }
 

src/plugins/git/gerrit/authenticationdialog.cpp

@@ -39,7 +39,7 @@ static QString findEntry(const QString &line, const QString &type)
     const QRegularExpressionMatch match = entryMatch(line, type);
     if (match.hasMatch())
         return match.captured(1);
-    return QString();
+    return {};
 }
 
 static bool replaceEntry(QString &line, const QString &type, const QString &value)

src/plugins/git/gerrit/gerritmodel.cpp

@@ -81,7 +81,7 @@ static inline QString defaultUrl(const QSharedPointer<GerritParameters> &p,
 QString GerritPatchSet::approvalsToHtml() const
 {
     if (approvals.isEmpty())
-        return QString();
+        return {};
 
     QString result;
     QTextStream str(&result);
@@ -411,7 +411,7 @@ QString GerritModel::toHtml(const QModelIndex& index) const
     static const QString neededByHeader = Git::Tr::tr("Needed by");
 
     if (!index.isValid())
-        return QString();
+        return {};
     const GerritChangePtr c = change(index);
     const QString serverPrefix = c->url.left(c->url.lastIndexOf('/') + 1);
     QString result;

src/plugins/git/gerrit/gerritpushdialog.cpp

@@ -56,7 +56,7 @@ QString GerritPushDialog::determineRemoteBranch(const QString &localBranch)
 
     if (!gitClient().synchronousBranchCmd(
                 m_workingDir, {"-r", "--contains", earliestCommit + '^'}, &output, &error)) {
-        return QString();
+        return {};
     }
     const QString head = "/HEAD";
     const QStringList refs = output.split('\n');

src/plugins/git/gitclient.cpp

@@ -1677,7 +1677,7 @@ QString GitClient::synchronousTopic(const FilePath &workingDirectory) const
     // Detached HEAD, try a tag or remote branch
     QStringList references;
     if (!synchronousHeadRefs(workingDirectory, &references))
-        return QString();
+        return {};
 
     const QString tagStart("refs/tags/");
     const QString remoteStart("refs/remotes/");
@@ -2262,7 +2262,7 @@ QString GitClient::commandInProgressDescription(const FilePath &workingDirectory
     case Merge:
         return Tr::tr("MERGING");
     }
-    return QString();
+    return {};
 }
 
 GitClient::CommandInProgress GitClient::checkCommandInProgress(const FilePath &workingDirectory) const

src/plugins/git/giteditor.cpp

@@ -110,11 +110,11 @@ QString GitEditorWidget::changeUnderCursor(const QTextCursor &c) const
     // Any number is regarded as change number.
     cursor.select(QTextCursor::WordUnderCursor);
     if (!cursor.hasSelection())
-        return QString();
+        return {};
     const QString change = cursor.selectedText();
     if (m_changeNumberPattern.match(change).hasMatch())
         return change;
-    return QString();
+    return {};
 }
 
 BaseAnnotationHighlighter *GitEditorWidget::createAnnotationHighlighter(const QSet<QString> &changes) const
@@ -317,7 +317,7 @@ QString GitEditorWidget::revisionSubject(const QTextBlock &inBlock) const
             return block.text().trimmed();
         }
     }
-    return QString();
+    return {};
 }
 
 bool GitEditorWidget::supportChangeLinks() const
@@ -363,21 +363,21 @@ QWidget *GitEditorWidget::addFilterWidget()
 QString GitEditorWidget::grepValue() const
 {
     if (!m_logFilterWidget)
-        return QString();
+        return {};
     return m_logFilterWidget->grepLineEdit->text();
 }
 
 QString GitEditorWidget::pickaxeValue() const
 {
     if (!m_logFilterWidget)
-        return QString();
+        return {};
     return m_logFilterWidget->pickaxeLineEdit->text();
 }
 
 QString GitEditorWidget::authorValue() const
 {
     if (!m_logFilterWidget)
-        return QString();
+        return {};
     return m_logFilterWidget->authorLineEdit->text();
 }
 

src/plugins/git/logchangedialog.cpp

@@ -95,7 +95,7 @@ QString LogChangeWidget::commit() const
 {
     if (const QStandardItem *sha1Item = currentItem(Sha1Column))
         return sha1Item->text();
-    return QString();
+    return {};
 }
 
 int LogChangeWidget::commitIndex() const
@@ -113,7 +113,7 @@ QString LogChangeWidget::earliestCommit() const
         if (const QStandardItem *item = m_model->item(rows - 1, Sha1Column))
             return item->text();
     }
-    return QString();
+    return {};
 }
 
 void LogChangeWidget::setItemDelegate(QAbstractItemDelegate *delegate)
@@ -269,7 +269,7 @@ int LogChangeDialog::commitIndex() const
 QString LogChangeDialog::resetFlag() const
 {
     if (!m_resetTypeComboBox)
-        return QString();
+        return {};
     return m_resetTypeComboBox->itemData(m_resetTypeComboBox->currentIndex()).toString();
 }
 

src/plugins/git/mergetool.cpp

@@ -94,7 +94,7 @@ QString MergeTool::mergeTypeName()
     case DeletedMerge: return Tr::tr("Deleted");
     case SymbolicLinkMerge: return Tr::tr("Symbolic link");
     }
-    return QString();
+    return {};
 }
 
 QString MergeTool::stateName(MergeTool::FileState state, const QString &extraInfo)
@@ -107,7 +107,7 @@ QString MergeTool::stateName(MergeTool::FileState state, const QString &extraInf
     case SymbolicLinkState: return Tr::tr("Symbolic link -> %1").arg(extraInfo);
     default: break;
     }
-    return QString();
+    return {};
 }
 
 void MergeTool::chooseAction()

src/plugins/git/remotemodel.cpp

@@ -112,14 +112,13 @@ QVariant RemoteModel::data(const QModelIndex &index, int role) const
     default:
         break;
     }
-    return QVariant();
+    return {};
 }
 
 QVariant RemoteModel::headerData(int section, Qt::Orientation orientation, int role) const
 {
     if (role != Qt::DisplayRole || orientation != Qt::Horizontal)
-        return QVariant();
-
+        return {};
     return (section == 0) ? Tr::tr("Name") : Tr::tr("URL");
 }
 

src/plugins/git/stashdialog.cpp

@@ -234,14 +234,14 @@ static inline QString nextStash(const QString &stash)
 {
     const int openingBracePos = stash.indexOf('{');
     if (openingBracePos == -1)
-        return QString();
+        return {};
     const int closingBracePos = stash.indexOf('}', openingBracePos + 2);
     if (closingBracePos == -1)
-        return QString();
+        return {};
     bool ok;
     const int n = stash.mid(openingBracePos + 1, closingBracePos - openingBracePos - 1).toInt(&ok);
     if (!ok)
-        return QString();
+        return {};
     QString rc =  stash.left(openingBracePos + 1);
     rc += QString::number(n + 1);
     rc += '}';

src/plugins/gitlab/queryrunner.cpp

@@ -51,7 +51,7 @@ QString Query::toString() const
     QString query = API_PREFIX;
     switch (m_type) {
     case Query::NoQuery:
-        return QString();
+        return {};
     case Query::Project:
         QTC_ASSERT(!m_parameter.isEmpty(), return {});
         query += QLatin1String(QUERY_PROJECT).arg(QLatin1String(