IDL: Add support for serializer definitions

Source/bindings/scripts/v8_interface.py

Index: Source/bindings/scripts/v8_interface.py
diff --git a/Source/bindings/scripts/v8_interface.py b/Source/bindings/scripts/v8_interface.py
index 6e4f37812c3fede093a6b387f19839620cd78a2e..40fc74272a659062fea4661d44e806f63679b5de 100644
--- a/Source/bindings/scripts/v8_interface.py
+++ b/Source/bindings/scripts/v8_interface.py
@@ -467,19 +467,39 @@ def interface_context(interface):
         # FIXME: maplike<> and setlike<> should also imply the presence of a
         # 'size' attribute.
 
+    # Serializer
+    if interface.serializer:
+        serializer = interface.serializer
+        serializer_ext_attrs = serializer.extended_attributes.copy()
+        if serializer.operation:
+            return_type = serializer.operation.idl_type
+            implemented_as = serializer.operation.name
+        else:
+            return_type = IdlType('any')
+            implemented_as = None
+            if 'CallWith' not in serializer_ext_attrs:

[haraken, 2015/03/26 01:39:20]

What if the serializer has [CallWith] but the [CallWith=...] doesn't have
'ScriptState'?

[Jens Widell, 2015/03/26 05:34:10]

We could call that a bug in the IDL; it needs a ScriptState to construct a
ScriptValue, after all.

To be honest, I just didn't want to complicate this code by supporting extending
an existing CallWith attribute.

[haraken, 2015/03/26 05:36:02]

Makes sense.

+                serializer_ext_attrs['CallWith'] = 'ScriptState'
+        methods.append(generated_method(
+            return_type=return_type,
+            name='toJSON',
+            extended_attributes=serializer_ext_attrs,
+            implemented_as=implemented_as))
+
     # Stringifier
     if interface.stringifier:
         stringifier = interface.stringifier
         stringifier_ext_attrs = stringifier.extended_attributes.copy()
         if stringifier.attribute:
-            stringifier_ext_attrs['ImplementedAs'] = stringifier.attribute.name
+            implemented_as = stringifier.attribute.name
         elif stringifier.operation:
-            stringifier_ext_attrs['ImplementedAs'] = stringifier.operation.name
+            implemented_as = stringifier.operation.name
+        else:
+            implemented_as = 'toString'
         methods.append(generated_method(
             return_type=IdlType('DOMString'),
             name='toString',
             extended_attributes=stringifier_ext_attrs,
-            implemented_as='toString'))
+            implemented_as=implemented_as))
 
     conditionally_enabled_methods = []
     custom_registration_methods = []