Add Cast() for Int32 and Uint32

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1034 matching lines @@
   INLINE(bool IsException() const);
   INLINE(bool IsUninitialized() const);
   INLINE(bool IsTrue() const);
   INLINE(bool IsFalse() const);
   INLINE(bool IsArgumentsMarker() const);
 
   // Filler objects (fillers and free space objects).
   INLINE(bool IsFiller() const);
 
   // Extract the number.
-  inline double Number();
+  inline double Number() const;
   INLINE(bool IsNaN() const);
   INLINE(bool IsMinusZero() const);
+  INLINE(bool IsInt32() const);
+  INLINE(bool IsUint32() const);
   bool ToInt32(int32_t* value);
   bool ToUint32(uint32_t* value);
 
   inline Representation OptimalRepresentation() {
     if (!FLAG_track_fields) return Representation::Tagged();
     if (IsSmi()) {
       return Representation::Smi();
     } else if (FLAG_track_double_fields && IsHeapNumber()) {
       return Representation::Double();
     } else if (FLAG_track_computed_fields && IsUninitialized()) {
@@ skipping 9863 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_