Replace qAsConst with C++17 std::as_const

src/collection/collectionmodel.cpp

@@ -24,6 +24,7 @@
 #include <memory>
 #include <functional>
 #include <algorithm>
+#include <utility>
 
 #include <QObject>
 #include <QtGlobal>
@@ -586,7 +587,7 @@ void CollectionModel::SongsDeleted(const SongList &songs) {
   }
 
   // Delete empty dividers
-  for (const QString &divider_key : qAsConst(divider_keys)) {
+  for (const QString &divider_key : std::as_const(divider_keys)) {
     if (!divider_nodes_.contains(divider_key)) continue;
 
     // Look to see if there are any other items still under this divider

src/collection/collectionwatcher.cpp

@@ -21,6 +21,7 @@
 
 #include "config.h"
 
+#include <utility>
 #include <chrono>
 #include <cassert>
 
@@ -163,8 +164,7 @@ void CollectionWatcher::ReloadSettings() {
   }
   else if (monitor_ && !was_monitoring_before) {
     // Add all directories to all QFileSystemWatchers again
-    QList<Directory> dirs = watched_dirs_.values();
-    for (const Directory &dir : dirs) {
+    for (const Directory &dir : std::as_const(watched_dirs_)) {
       SubdirectoryList subdirs = backend_->SubdirsInDirectory(dir.id);
       for (const Subdirectory &subdir : subdirs) {
         AddWatch(dir, subdir.path);
@@ -414,7 +414,7 @@ void CollectionWatcher::ScanSubdirectory(const QString &path, const Subdirectory
   // Do not scan symlinked dirs that are already in collection
   if (path_info.isSymLink()) {
     QString real_path = path_info.symLinkTarget();
-    for (const Directory &dir : qAsConst(watched_dirs_)) {
+    for (const Directory &dir : std::as_const(watched_dirs_)) {
       if (real_path.startsWith(dir.path)) {
         return;
       }
@@ -1145,8 +1145,7 @@ void CollectionWatcher::PerformScan(const bool incremental, const bool ignore_mt
 
   stop_requested_ = false;
 
-  QList<Directory> dirs = watched_dirs_.values();
-  for (const Directory &dir : dirs) {
+  for (const Directory &dir : std::as_const(watched_dirs_)) {
 
     if (stop_requested_) break;
 
@@ -1195,7 +1194,7 @@ quint64 CollectionWatcher::FilesCountForPath(ScanTransaction *t, const QString &
       }
       if (path_info.isSymLink()) {
         QString real_path = path_info.symLinkTarget();
-        for (const Directory &dir : qAsConst(watched_dirs_)) {
+        for (const Directory &dir : std::as_const(watched_dirs_)) {
           if (real_path.startsWith(dir.path)) {
             continue;
           }

src/device/udisks2lister.cpp

@@ -22,6 +22,7 @@
 #include "config.h"
 
 #include <memory>
+#include <utility>
 
 #include <dbus/objectmanager.h>
 #include <dbus/udisks2block.h>
@@ -273,7 +274,7 @@ void Udisks2Lister::RemoveDevice(const QDBusObjectPath &device_path) {
 
   QWriteLocker locker(&device_data_lock_);
   QString id;
-  for (const auto &data : qAsConst(device_data_)) {
+  for (const PartitionData &data : std::as_const(device_data_)) {
     if (data.dbus_path == device_path.path()) {
       id = data.unique_id();
       break;

src/moodbar/moodbaritemdelegate.cpp

@@ -278,7 +278,7 @@ void MoodbarItemDelegate::ImageLoaded(const QUrl &url, const QImage &image) {
   const QSortFilterProxyModel *filter = playlist->proxy();
 
   // Update all the indices with the new pixmap.
-  for (const QPersistentModelIndex &idx : qAsConst(data->indexes_)) {
+  for (const QPersistentModelIndex &idx : std::as_const(data->indexes_)) {
     if (idx.isValid() && idx.sibling(idx.row(), Playlist::Column_Filename).data().toUrl() == url) {
       QModelIndex source_index = idx;
       if (idx.model() == filter) {

src/playlist/playlistlistcontainer.cpp

@@ -22,6 +22,7 @@
 #include "config.h"
 
 #include <memory>
+#include <utility>
 
 #include <QObject>
 #include <QWidget>
@@ -416,7 +417,7 @@ void PlaylistListContainer::Delete() {
   }
 
   // Unfavorite the playlists
-  for (const int id : qAsConst(ids)) {
+  for (const int id : std::as_const(ids)) {
     app_->playlist_manager()->Favorite(id, false);
   }
 

src/playlist/playlistmanager.cpp

@@ -23,6 +23,7 @@
 
 #include <memory>
 #include <functional>
+#include <utility>
 
 #include <QtGlobal>
 #include <QObject>
@@ -496,7 +497,7 @@ void PlaylistManager::SongsDiscovered(const SongList &songs) {
   // Some songs might've changed in the collection, let's update any playlist items we have that match those songs
 
   for (const Song &song : songs) {
-    for (const Data &data : qAsConst(playlists_)) {
+    for (const Data &data : std::as_const(playlists_)) {
       PlaylistItemList items = data.p->collection_items_by_id(song.id());
       for (PlaylistItemPtr item : items) {
         if (item->Metadata().directory_id() != song.directory_id()) continue;

src/widgets/fancytabwidget.cpp

@@ -22,6 +22,7 @@
 #include "config.h"
 
 #include <algorithm>
+#include <utility>
 #include <chrono>
 
 #include <QtGlobal>
@@ -477,7 +478,7 @@ void FancyTabWidget::Load(const QString &kSettingsGroup) {
   QSettings s;
   s.beginGroup(kSettingsGroup);
   QMultiMap <int, TabData*> tabs;
-  for (TabData *tab : qAsConst(tabs_)) {
+  for (TabData *tab : std::as_const(tabs_)) {
     int idx = s.value("tab_" + tab->name(), tab->index()).toInt();
     while (tabs.contains(idx)) { ++idx; }
     tabs.insert(idx, tab);
@@ -505,7 +506,7 @@ void FancyTabWidget::SaveSettings(const QString &kSettingsGroup) {
   s.setValue("tab_mode", mode_);
   s.setValue("current_tab", currentIndex());
 
-  for (TabData *tab : qAsConst(tabs_)) {
+  for (TabData *tab : std::as_const(tabs_)) {
     QString k = "tab_" + tab->name();
     int idx = QTabWidget::indexOf(tab->page());
     if (idx < 0) {