1 files changed, 3 insertions, 8 deletions
diff --git a/Source/JavaScriptCore/heap/Handle.h b/Source/JavaScriptCore/heap/Handle.h
index 28ac30cd9..ba4161c25 100644
--- a/Source/JavaScriptCore/heap/Handle.h
+++ b/Source/JavaScriptCore/heap/Handle.h
@@ -23,8 +23,7 @@
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef Handle_h
-#define Handle_h
+#pragma once
 
 #include "HandleTypes.h"
 
@@ -52,9 +51,7 @@ class HandleBase {
 public:
     bool operator!() const { return !m_slot || !*m_slot; }
 
-    // This conversion operator allows implicit conversion to bool but not to other integer types.
-    typedef JSValue (HandleBase::*UnspecifiedBoolType);
-    operator UnspecifiedBoolType*() const { return (m_slot && *m_slot) ? reinterpret_cast<UnspecifiedBoolType*>(1) : 0; }
+    explicit operator bool() const { return m_slot && *m_slot; }
 
     HandleSlot slot() const { return m_slot; }
 
@@ -184,6 +181,4 @@ template <typename T, typename U> inline bool operator!=(JSValue a, const Handle
     return a != b.get(); 
 }
 
-}
-
-#endif
+} // namespace JSC