fix: minor warnings (#5409)

* chore: fix readability-qualified-auto warnings

* chore: fix clang-analyzer-core.uninitialized.Branch warning

* fix: collision of key 'ERROR' in transmission-qt

* chore: silence -Wshadow warning

* chore: silence warning C4100: 'iter': unreferenced formal parameter

* chore: fix warning C4127: conditional expression is constant warning

gtk/Session.cc

@@ -645,7 +645,7 @@ void Session::Impl::on_torrent_metadata_changed(tr_torrent* raw_torrent)
         [this, core = get_core_ptr(), torrent_id = tr_torrentId(raw_torrent)]()
         {
             /* update the torrent's collated name */
-            if (auto const [torrent, position] = find_torrent_by_id(torrent_id); torrent != nullptr)
+            if (auto const& [torrent, position] = find_torrent_by_id(torrent_id); torrent)
             {
                 torrent->update();
             }
@@ -912,7 +912,7 @@ void Session::Impl::torrents_added()
 
 void Session::torrent_changed(tr_torrent_id_t id)
 {
-    if (auto const [torrent, position] = impl_->find_torrent_by_id(id); torrent != nullptr)
+    if (auto const& [torrent, position] = impl_->find_torrent_by_id(id); torrent)
     {
         torrent->update();
     }
@@ -920,7 +920,7 @@ void Session::torrent_changed(tr_torrent_id_t id)
 
 void Session::remove_torrent(tr_torrent_id_t id, bool delete_files)
 {
-    if (auto const [torrent, position] = impl_->find_torrent_by_id(id); torrent != nullptr)
+    if (auto const& [torrent, position] = impl_->find_torrent_by_id(id); torrent)
     {
         /* remove from the gui */
         impl_->get_raw_model()->remove(position);

libtransmission/tr-dht.cc

@@ -379,11 +379,11 @@ private:
 
     static auto remove_bad_pex(std::vector<tr_pex>&& pex)
     {
-        static constexpr auto IsBadPex = [](tr_pex const& pex)
+        static constexpr auto IsBadPex = [](tr_pex const& candidate)
         {
             // paper over a bug in some DHT implementation that gives port 1.
             // Xref: https://github.com/transmission/transmission/issues/527
-            return pex.port.host() == 1;
+            return candidate.port == tr_port::fromHost(1);
         };
 
         pex.erase(std::remove_if(std::begin(pex), std::end(pex), IsBadPex), std::end(pex));

qt/Filters.h

@@ -37,12 +37,13 @@ public:
 
     /* The Torrent properties that can affect this filter.
        When one of these changes, it's time to refilter. */
-    static Torrent::fields_t constexpr TorrentFields = //
+    static constexpr auto TorrentFields = Torrent::fields_t{
-        (uint64_t(1) << Torrent::ERROR) | //
+        (uint64_t{ 1 } << Torrent::TORRENT_ERROR) | //
-        (uint64_t(1) << Torrent::IS_FINISHED) | //
+        (uint64_t{ 1 } << Torrent::IS_FINISHED) | //
-        (uint64_t(1) << Torrent::PEERS_GETTING_FROM_US) | //
+        (uint64_t{ 1 } << Torrent::PEERS_GETTING_FROM_US) | //
-        (uint64_t(1) << Torrent::PEERS_SENDING_TO_US) | //
+        (uint64_t{ 1 } << Torrent::PEERS_SENDING_TO_US) | //
-        (uint64_t(1) << Torrent::STATUS);
+        (uint64_t{ 1 } << Torrent::STATUS) //
+    };
 
     static bool test(Torrent const& tor, int mode);
 

qt/Torrent.cc

@@ -210,7 +210,7 @@ Torrent::fields_t Torrent::update(tr_quark const* keys, tr_variant const* const*
             HANDLE_KEY(downloadLimited, download_limited, DOWNLOAD_LIMITED)
             HANDLE_KEY(downloadedEver, downloaded_ever, DOWNLOADED_EVER)
             HANDLE_KEY(editDate, edit_date, EDIT_DATE)
-            HANDLE_KEY(error, error, ERROR)
+            HANDLE_KEY(error, error, TORRENT_ERROR)
             HANDLE_KEY(eta, eta, ETA)
             HANDLE_KEY(fileStats, files, FILES)
             HANDLE_KEY(files, files, FILES)
@@ -269,7 +269,7 @@ Torrent::fields_t Torrent::update(tr_quark const* keys, tr_variant const* const*
             HANDLE_KEY(comment, comment, COMMENT)
             HANDLE_KEY(creator, creator, CREATOR)
             HANDLE_KEY(downloadDir, download_dir, DOWNLOAD_DIR)
-            HANDLE_KEY(errorString, error_string, ERROR_STRING)
+            HANDLE_KEY(errorString, error_string, TORRENT_ERROR_STRING)
 
 #undef HANDLE_KEY
         default:

qt/Torrent.h

@@ -27,10 +27,6 @@
 #include "IconCache.h"
 #include "Speed.h"
 
-#ifdef ERROR
-#undef ERROR
-#endif
-
 class QPixmap;
 
 class Prefs;
@@ -572,8 +568,8 @@ public:
         DOWNLOAD_LIMITED,
         DOWNLOAD_SPEED,
         EDIT_DATE,
-        ERROR,
+        TORRENT_ERROR,
-        ERROR_STRING,
+        TORRENT_ERROR_STRING,
         ETA,
         FAILED_EVER,
         FILE_COUNT,