Add operator< for InfoHash class

src/base/bittorrent/infohash.cpp

@@ -84,6 +84,11 @@ bool BitTorrent::operator!=(const InfoHash &left, const InfoHash &right)
     return !(left == right);
 }
 
+bool BitTorrent::operator<(const InfoHash &left, const InfoHash &right)
+{
+    return static_cast<lt::sha1_hash>(left) < static_cast<lt::sha1_hash>(right);
+}
+
 uint BitTorrent::qHash(const InfoHash &key, const uint seed)
 {
     return ::qHash((std::hash<lt::sha1_hash> {})(key), seed);

src/base/bittorrent/infohash.h

@@ -61,6 +61,7 @@ namespace BitTorrent
 
     bool operator==(const InfoHash &left, const InfoHash &right);
     bool operator!=(const InfoHash &left, const InfoHash &right);
+    bool operator<(const InfoHash &left, const InfoHash &right);
     uint qHash(const InfoHash &key, uint seed);
 }
 

src/gui/transferlistsortmodel.cpp

@@ -102,8 +102,8 @@ bool TransferListSortModel::lessThan_impl(const QModelIndex &left, const QModelI
     const auto hashLessThan = [this, &left, &right]() -> bool
     {
         const TransferListModel *model = qobject_cast<TransferListModel *>(sourceModel());
-        const QString hashL = model->torrentHandle(left)->hash();
-        const QString hashR = model->torrentHandle(right)->hash();
+        const BitTorrent::InfoHash hashL = model->torrentHandle(left)->hash();
+        const BitTorrent::InfoHash hashR = model->torrentHandle(right)->hash();
         return hashL < hashR;
     };