Add explicit

src/collection/collection.h

@@ -43,7 +43,7 @@ class SCollection : public QObject {
   Q_OBJECT
 
  public:
-  SCollection(Application *app, QObject *parent);
+  explicit SCollection(Application *app, QObject *parent);
   ~SCollection();
 
   static const char *kSongsTable;

src/collection/collectionbackend.h

@@ -45,7 +45,7 @@ class CollectionBackendInterface : public QObject {
   Q_OBJECT
 
  public:
-  CollectionBackendInterface(QObject *parent = nullptr) : QObject(parent) {}
+  explicit CollectionBackendInterface(QObject *parent = nullptr) : QObject(parent) {}
   virtual ~CollectionBackendInterface() {}
 
   struct Album {

src/collection/collectiondirectorymodel.h

@@ -42,7 +42,7 @@ class CollectionDirectoryModel : public QStandardItemModel {
   Q_OBJECT
 
  public:
-  CollectionDirectoryModel(CollectionBackend* backend, QObject *parent = nullptr);
+  explicit CollectionDirectoryModel(CollectionBackend* backend, QObject *parent = nullptr);
   ~CollectionDirectoryModel();
 
   // To be called by GUIs

src/collection/collectionfilterwidget.h

@@ -48,7 +48,7 @@ class CollectionFilterWidget : public QWidget {
   Q_OBJECT
 
  public:
-  CollectionFilterWidget(QWidget *parent = nullptr);
+  explicit CollectionFilterWidget(QWidget *parent = nullptr);
   ~CollectionFilterWidget();
 
   static const int kFilterDelay = 500;  // msec

src/collection/collectionitem.h

@@ -37,12 +37,12 @@ class CollectionItem : public SimpleTreeItem<CollectionItem> {
     Type_LoadingIndicator,
   };
 
-  CollectionItem(SimpleTreeModel<CollectionItem> *model)
+  explicit CollectionItem(SimpleTreeModel<CollectionItem> *model)
       : SimpleTreeItem<CollectionItem>(Type_Root, model),
         container_level(-1),
         compilation_artist_node_(nullptr) {}
 
-  CollectionItem(Type type, CollectionItem *parent = nullptr)
+  explicit CollectionItem(Type type, CollectionItem *parent = nullptr)
       : SimpleTreeItem<CollectionItem>(type, parent),
         container_level(-1),
         compilation_artist_node_(nullptr) {}

src/collection/collectionitemdelegate.h

@@ -36,7 +36,7 @@ class CollectionItemDelegate : public QStyledItemDelegate {
   Q_OBJECT
 
  public:
-  CollectionItemDelegate(QObject *parent);
+  explicit CollectionItemDelegate(QObject *parent);
   void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;
 
  public slots:

src/collection/collectionmodel.h

@@ -62,7 +62,7 @@ class CollectionModel : public SimpleTreeModel<CollectionItem> {
   Q_ENUMS(GroupBy)
 
  public:
-  CollectionModel(CollectionBackend *backend, Application *app, QObject *parent = nullptr);
+  explicit CollectionModel(CollectionBackend *backend, Application *app, QObject *parent = nullptr);
   ~CollectionModel();
 
   static const char *kSavedGroupingsSettingsGroup;

src/collection/collectionplaylistitem.h

@@ -33,8 +33,8 @@ class SqlRow;
 
 class CollectionPlaylistItem : public PlaylistItem {
  public:
-  CollectionPlaylistItem();
-  CollectionPlaylistItem(const Song &song);
+  explicit CollectionPlaylistItem();
+  explicit CollectionPlaylistItem(const Song &song);
 
   bool InitFromQuery(const SqlRow &query);
   void Reload();

src/collection/collectionquery.h

@@ -72,7 +72,7 @@ struct QueryOptions {
 
 class CollectionQuery {
  public:
-  CollectionQuery(const QueryOptions &options = QueryOptions());
+  explicit CollectionQuery(const QueryOptions &options = QueryOptions());
 
   // Sets contents of SELECT clause on the query (list of columns to get).
   void SetColumnSpec(const QString &spec) { column_spec_ = spec; }

src/collection/collectionview.h

@@ -53,7 +53,7 @@ class CollectionView : public AutoExpandingTreeView {
   Q_OBJECT
 
  public:
-  CollectionView(QWidget *parent = nullptr);
+  explicit CollectionView(QWidget *parent = nullptr);
   ~CollectionView();
 
   // Returns Songs currently selected in the collection view.

src/collection/collectionviewcontainer.h

@@ -34,7 +34,7 @@ class CollectionViewContainer : public QWidget {
   Q_OBJECT
 
  public:
-  CollectionViewContainer(QWidget *parent = nullptr);
+  explicit CollectionViewContainer(QWidget *parent = nullptr);
   ~CollectionViewContainer();
 
   CollectionFilterWidget *filter() const;

src/collection/collectionwatcher.h

@@ -48,7 +48,7 @@ class CollectionWatcher : public QObject {
   Q_OBJECT
 
  public:
-  CollectionWatcher(Song::Source source, QObject *parent = nullptr);
+  explicit CollectionWatcher(Song::Source source, QObject *parent = nullptr);
 
   void set_backend(CollectionBackend *backend) { backend_ = backend; }
   void set_task_manager(TaskManager *task_manager) { task_manager_ = task_manager; }
@@ -64,7 +64,7 @@ class CollectionWatcher : public QObject {
 
   void ExitAsync();
 
-signals:
+ signals:
   void NewOrUpdatedSongs(const SongList &songs);
   void SongsMTimeUpdated(const SongList &songs);
   void SongsDeleted(const SongList &songs);

src/collection/groupbydialog.h

@@ -40,7 +40,7 @@ class GroupByDialog : public QDialog {
   Q_OBJECT
 
  public:
-  GroupByDialog(QWidget *parent = nullptr);
+  explicit GroupByDialog(QWidget *parent = nullptr);
   ~GroupByDialog();
 
  public slots:

src/collection/savedgroupingmanager.h

@@ -39,7 +39,7 @@ class SavedGroupingManager : public QDialog {
   Q_OBJECT
 
  public:
-  SavedGroupingManager(QWidget *parent = nullptr);
+  explicit SavedGroupingManager(QWidget *parent = nullptr);
   ~SavedGroupingManager();
 
   void UpdateModel();