Macro support for unpacking weak pointers.

src/Assert.hpp

@@ -18,3 +18,6 @@
 #endif
 
 #define AssertNotNull(value) Assert(value != nullptr)
+#define UnpackWeakPtr(weakPtr, sharedPtr)                                                                              \
+    Assert(!weakPtr.expired());                                                                                        \
+    auto sharedPtr = weakPtr.lock();