Use Qt provided forward declaration header

src/base/bittorrent/session.h

@@ -41,6 +41,7 @@
 #include <QHash>
 #include <QPointer>
 #include <QSet>
+#include <QtContainerFwd>
 #include <QVector>
 
 #include "base/settingvalue.h"
@@ -58,7 +59,6 @@ class QFile;
 class QNetworkConfiguration;
 class QNetworkConfigurationManager;
 class QString;
-class QStringList;
 class QThread;
 class QTimer;
 class QUrl;

src/base/bittorrent/torrenthandle.cpp

@@ -31,6 +31,8 @@
 
 #include <type_traits>
 
+#include <QHash>
+
 namespace BitTorrent
 {
     uint qHash(const TorrentState key, const uint seed)

src/base/bittorrent/torrenthandle.h

@@ -29,15 +29,12 @@
 
 #pragma once
 
-#include <QHash>
 #include <QMetaType>
-#include <QSet>
 #include <QString>
-#include <QVector>
+#include <QtContainerFwd>
 
 class QBitArray;
 class QDateTime;
-class QStringList;
 class QUrl;
 
 namespace BitTorrent

src/base/bittorrent/torrentinfo.cpp

@@ -40,6 +40,7 @@
 #include <QString>
 #include <QStringList>
 #include <QUrl>
+#include <QVector>
 
 #include "base/exceptions.h"
 #include "base/global.h"

src/base/bittorrent/torrentinfo.h

@@ -32,14 +32,13 @@
 #include <libtorrent/torrent_info.hpp>
 
 #include <QCoreApplication>
-#include <QVector>
+#include <QtContainerFwd>
 
 #include "base/indexrange.h"
 
 class QByteArray;
 class QDateTime;
 class QString;
-class QStringList;
 class QUrl;
 
 namespace BitTorrent

src/base/filesystemwatcher.h

@@ -32,11 +32,10 @@
 #include <QDir>
 #include <QFileSystemWatcher>
 #include <QHash>
+#include <QtContainerFwd>
 #include <QTimer>
 #include <QVector>
 
-class QStringList;
-
 /*
  * Subclassing QFileSystemWatcher in order to support Network File
  * System watching (NFS, CIFS) on Linux and Mac OS.

src/base/logger.cpp

@@ -31,6 +31,7 @@
 #include <algorithm>
 
 #include <QDateTime>
+#include <QVector>
 
 namespace
 {

src/base/logger.h

@@ -34,7 +34,7 @@
 #include <QObject>
 #include <QReadWriteLock>
 #include <QString>
-#include <QVector>
+#include <QtContainerFwd>
 
 const int MAX_LOG_MESSAGES = 20000;
 

src/base/preferences.cpp

@@ -41,6 +41,7 @@
 #include <QCoreApplication>
 #include <QDateTime>
 #include <QDir>
+#include <QList>
 #include <QLocale>
 #include <QNetworkCookie>
 #include <QSettings>

src/base/preferences.h

@@ -30,16 +30,15 @@
 #ifndef PREFERENCES_H
 #define PREFERENCES_H
 
-#include <QList>
+#include <QtContainerFwd>
+#include <QVariant>
 
 #include "base/utils/net.h"
 
 class QDateTime;
 class QNetworkCookie;
 class QSize;
-class QStringList;
 class QTime;
-class QVariant;
 
 enum SchedulerDays
 {

src/base/scanfoldersmodel.h

@@ -31,8 +31,7 @@
 
 #include <QAbstractListModel>
 #include <QList>
-
-class QStringList;
+#include <QtContainerFwd>
 
 class FileSystemWatcher;
 

src/base/search/searchhandler.cpp

@@ -31,6 +31,7 @@
 
 #include <QProcess>
 #include <QTimer>
+#include <QVector>
 
 #include "base/global.h"
 #include "base/utils/foreignapps.h"

src/base/search/searchhandler.h

@@ -33,7 +33,7 @@
 #include <QList>
 #include <QObject>
 #include <QString>
-#include <QVector>
+#include <QtContainerFwd>
 
 class QProcess;
 class QTimer;

src/base/types.h

@@ -29,7 +29,7 @@
 #ifndef TYPES_H
 #define TYPES_H
 
-#include <QMap>
+#include <QtContainerFwd>
 
 const qlonglong MAX_ETA = 8640000;
 

src/base/utils/bytearray.cpp

@@ -29,6 +29,7 @@
 #include "bytearray.h"
 
 #include <QByteArray>
+#include <QVector>
 
 QVector<QByteArray> Utils::ByteArray::splitToViews(const QByteArray &in, const QByteArray &sep, const QString::SplitBehavior behavior)
 {

src/base/utils/bytearray.h

@@ -29,7 +29,7 @@
 #pragma once
 
 #include <QString>
-#include <QVector>
+#include <QtContainerFwd>
 
 class QByteArray;
 

src/base/utils/misc.cpp

@@ -52,6 +52,7 @@
 #include <QRegularExpression>
 #include <QSet>
 #include <QSysInfo>
+#include <QVector>
 
 #if (defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)) && defined(QT_DBUS_LIB)
 #include <QDBusInterface>

src/base/utils/net.cpp

@@ -28,10 +28,13 @@
 
 #include "net.h"
 
+#include <QList>
 #include <QNetworkInterface>
+#include <QPair>
 #include <QSslCertificate>
 #include <QSslKey>
 #include <QString>
+#include <QVector>
 
 namespace Utils
 {

src/base/utils/net.h

@@ -30,9 +30,7 @@
 #define BASE_UTILS_NET_H
 
 #include <QHostAddress>
-#include <QList>
-#include <QPair>
-#include <QVector>
+#include <QtContainerFwd>
 
 class QSslCertificate;
 class QSslKey;

src/base/utils/password.cpp

@@ -34,6 +34,7 @@
 
 #include <QByteArray>
 #include <QString>
+#include <QVector>
 
 #include "bytearray.h"
 #include "random.h"

src/base/utils/string.cpp

@@ -35,6 +35,7 @@
 #include <QLocale>
 #include <QRegExp>
 #include <QtGlobal>
+#include <QVector>
 
 #if defined(Q_OS_MACOS) || defined(__MINGW32__)
 #define QBT_USES_QTHREADSTORAGE

src/base/utils/string.h

@@ -31,9 +31,10 @@
 #define UTILS_STRING_H
 
 #include <QChar>
-#include <QVector>
+#include <QString>
+#include <Qt>
+#include <QtContainerFwd>
 
-class QString;
 class QStringRef;
 
 class TriStateBool;