Create fewer local v8::TryCatch objects in generated bindings code

Source/bindings/v8/V8BindingMacros.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 28 matching lines @@
 
 #define TONATIVE_EXCEPTION(type, var, value) \
     type var;                                \
     {                                        \
         v8::TryCatch block;                  \
         var = (value);                       \
         if (UNLIKELY(block.HasCaught()))     \
             return block.ReThrow();          \
     }
 
+#define TONATIVE_VOID_INTERNAL(var, value) \
+    var = (value);                        \
+    if (UNLIKELY(block.HasCaught())) {    \
+        block.ReThrow();                  \
+        return;                           \
+    }
+
 #define TONATIVE_VOID(type, var, value)    \
     type var;                              \
     {                                      \
         v8::TryCatch block;                \
-        var = (value);                     \
-        if (UNLIKELY(block.HasCaught())) { \
-            block.ReThrow();               \
-            return;                        \
-        }                                  \
+        TONATIVE_VOID_INTERNAL(var, value); \
     }
 
 #define TONATIVE_DEFAULT(type, var, value, retVal) \
     type var;                                      \
     {                                              \
         v8::TryCatch block;                        \
         var = (value);                             \
         if (UNLIKELY(block.HasCaught())) {         \
             block.ReThrow();                       \
             return retVal;                         \
         }                                          \
     }
 
-#define TONATIVE_VOID_EXCEPTIONSTATE(type, var, value, exceptionState) \
-    type var;                                                          \
-    {                                                                  \
-        v8::TryCatch block;                                            \
-        var = (value);                                                 \
-        if (UNLIKELY(block.HasCaught()))                               \
-            exceptionState.rethrowV8Exception(block.Exception());      \
-        if (UNLIKELY(exceptionState.throwIfNeeded()))                  \
-            return;                                                    \
+#define TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(var, value, exceptionState) \
+    var = (value);                                                       \
+    if (UNLIKELY(block.HasCaught()))                                     \
+        exceptionState.rethrowV8Exception(block.Exception());            \
+    if (UNLIKELY(exceptionState.throwIfNeeded()))                        \
+        return;
+
+#define TONATIVE_VOID_EXCEPTIONSTATE(type, var, value, exceptionState)    \
+    type var;                                                             \
+    {                                                                     \
+        v8::TryCatch block;                                               \
+        TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(var, value, exceptionState); \
     }
 
 #define TONATIVE_DEFAULT_EXCEPTIONSTATE(type, var, value, exceptionState, retVal) \
     type var;                                                                 \
     {                                                                         \
         v8::TryCatch block;                                                   \
         var = (value);                                                        \
         if (UNLIKELY(block.HasCaught()))                                      \
             exceptionState.rethrowV8Exception(block.Exception());             \
         if (UNLIKELY(exceptionState.throwIfNeeded()))                         \
             return retVal;                                                    \
     }
 
 // type is an instance of class template V8StringResource<>,
 // but Mode argument varies; using type (not Mode) for consistency
 // with other macros and ease of code generation
 #define TOSTRING_VOID(type, var, value) \
     type var(value);                    \
     if (UNLIKELY(!var.prepare()))       \
         return;
 
+#define TOSTRING_VOID_INTERNAL(var, value) \
+    var = (value);                         \
+    if (UNLIKELY(!var.prepare()))          \
+        return;
+
+#define TOSTRING_VOID_INTERNAL_RETHROW(var, value, block) \
+    var = (value);                                        \
+    if (UNLIKELY(!var.prepare())) {                       \
+        block.ReThrow();                                  \
+        return;                                           \
+    }
+
 #define TOSTRING_DEFAULT(type, var, value, retVal) \
     type var(value);                               \
     if (UNLIKELY(!var.prepare()))                  \
         return retVal;
 
 } // namespace WebCore
 
 #endif // V8BindingMacros_h