[libcalamares] Distinguish logging raw, shared and unique pointers

- It shouldn't be necessary to explicitly .get() pointers for
  logging, and it's convenient to know when a pointer is smart.
  * no annotation means raw (e.g. @0x0)
  * S means shared
  * U means unique

src/libcalamares/utils/Logger.h

@@ -13,9 +13,12 @@
 #ifndef UTILS_LOGGER_H
 #define UTILS_LOGGER_H
 
+#include "DllMacro.h"
+
 #include <QDebug>
+#include <QSharedPointer>
 
-#include "DllMacro.h"
+#include <memory>
 
 namespace Logger
 {
@@ -206,16 +209,34 @@ public:
  * Pointers are printed as void-pointer, so just an address (unlike, say,
  * QObject pointers which show an address and some metadata) preceded
  * by an '@'. This avoids C-style (void*) casts in the code.
+ *
+ * Shared pointers are indicated by 'S@' and unique pointers by 'U@'.
  */
 struct Pointer
 {
 public:
     explicit Pointer( const void* p )
         : ptr( p )
+        , kind( 0 )
+    {
+    }
+
+    template < typename T >
+    explicit Pointer( const std::shared_ptr< T >& p )
+        : ptr( p.get() )
+        , kind( 'S' )
+    {
+    }
+
+    template < typename T >
+    explicit Pointer( const std::unique_ptr< T >& p )
+        : ptr( p.get() )
+        , kind( 'U' )
     {
     }
 
     const void* const ptr;
+    const char kind;
 };
 
 /** @brief output operator for DebugRow */
@@ -256,7 +277,12 @@ operator<<( QDebug& s, const DebugMap& t )
 inline QDebug&
 operator<<( QDebug& s, const Pointer& p )
 {
-    s << NoQuote << '@' << p.ptr << Quote;
+    s << NoQuote;
+    if ( p.kind )
+    {
+        s << p.kind;
+    }
+    s << '@' << p.ptr << Quote;
     return s;
 }
 }  // namespace Logger

src/modules/partition/jobs/AutoMountManagementJob.cpp

@@ -25,7 +25,7 @@ AutoMountManagementJob::prettyName() const
 Calamares::JobResult
 AutoMountManagementJob::exec()
 {
-    Logger::CDebug(Logger::LOGVERBOSE) << "this" << Logger::Pointer( this ) << "value" << Logger::Pointer( m_stored.get() );
+    Logger::CDebug(Logger::LOGVERBOSE) << "this" << Logger::Pointer( this ) << "value" << Logger::Pointer( m_stored );
     if ( m_stored )
     {
         CalamaresUtils::Partition::automountRestore( m_stored );

src/modules/partition/tests/AutoMountTests.cpp

@@ -40,7 +40,7 @@ AutoMountJobTests::testRunThrice()
     Logger::setupLogLevel( Logger::LOGVERBOSE );
 
     auto original = CalamaresUtils::Partition::automountDisable( true );
-    cDebug() << "Got automount info" << Logger::Pointer( original.get() );
+    cDebug() << "Got automount info" << Logger::Pointer( original );
 
     AutoMountManagementJob j( false );
     QVERIFY( j.exec() );