Remove lazy binding evaluation

Too much of the existing code in Qt requires eager evaluation without
large scale modifications. Combined with the fact that supporting both
eager and lazy evaluation has a high maintenance burden, keeping lazy
evaluation, at least in its current state, is not worth it.

This does not diminish other benefits of the new property system, which
include
- a C++ API to setup and modify bindings and
- faster execution compared to QML's existing bindings and the ability
  to use them without having a QML engine.

We do no longer benefit from doing less work thanks to laziness. A later
commit will introduce grouping support to recapture some of this
benefit.

[ChangeLog][Import Behavior Change][QProperty] QProperty uses always
eager evaluation now when a dependency in a binding changes.

Change-Id: I34694fd5c7bcb1d31a0052d2e3da8b68d016671b
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Andreas Buhr <andreas.buhr@qt.io>
Reviewed-by: Andrei Golubev <andrei.golubev@qt.io>

1 files changed, 1 insertions, 2 deletions

diff --git a/src/corelib/kernel/qpropertyprivate.h b/src/corelib/kernel/qpropertyprivate.h
index 896ad17395..b6d93529d1 100644
--- a/src/corelib/kernel/qpropertyprivate.h
+++ b/src/corelib/kernel/qpropertyprivate.h
@@ -249,8 +249,7 @@ public:
 
     }
 
-    void evaluateIfDirty(const QUntypedPropertyData *property) const;
-    void markDirty();
+    void evaluateIfDirty(const QUntypedPropertyData *) const; // ### Kept for BC reasons, unused
 
     void removeBinding()
     {