Don't test for equality if types can't be compared

For types that don't have an operator==(), always trigger the binding
and the changed notification.

Task-number: QTBUG-85578
Change-Id: I41374f6d13c88106f4de83864e82172f3a248150
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 8 insertions, 4 deletions

diff --git a/src/corelib/kernel/qpropertyprivate.h b/src/corelib/kernel/qpropertyprivate.h
index ad5ed59e88..dde6bb8d01 100644
--- a/src/corelib/kernel/qpropertyprivate.h
+++ b/src/corelib/kernel/qpropertyprivate.h
@@ -139,15 +139,19 @@ public:
     T getValue() const { return value; }
     bool setValueAndReturnTrueIfChanged(T &&v)
     {
-        if (v == value)
-            return false;
+        if constexpr (QTypeTraits::has_operator_equal_v<T>) {
+            if (v == value)
+                return false;
+        }
         value = std::move(v);
         return true;
     }
     bool setValueAndReturnTrueIfChanged(const T &v)
     {
-        if (v == value)
-            return false;
+        if constexpr (QTypeTraits::has_operator_equal_v<T>) {
+            if (v == value)
+                return false;
+        }
         value = v;
         return true;
     }