Support per-overload [RuntimeEnabled] extended attribute

Source/bindings/scripts/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 # coding=utf-8
 #
 # 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 233 matching lines @@
         'has_per_context_enabled_attributes': any(attribute['per_context_enabled_function'] for attribute in attributes),
         'has_replaceable_attributes': any(attribute['is_replaceable'] for attribute in attributes),
     })
 
     # Methods
     methods = [v8_methods.generate_method(interface, method)
                for method in interface.operations
                if method.name]  # Skip anonymous special operations (methods)
     generate_method_overloads(methods)
     for method in methods:
-        method['do_generate_method_configuration'] = (
-            method['do_not_check_signature'] and
-            not method['per_context_enabled_function'] and
-            # For overloaded methods, only generate one accessor
-            ('overload_index' not in method or method['overload_index'] == 1))
+        if 'overloads' in method:
+            overloads = method['overloads']
+            method['do_generate_method_configuration'] = (
+                overloads['do_not_check_signature_all'] and
+                not overloads['per_context_enabled_function_all'])
+        else:
+            method['do_generate_method_configuration'] = (
+                method['do_not_check_signature'] and
+                not method['per_context_enabled_function'] and
+                # Ignore any overload not handled by the case above
+                'overload_index' not in method)
 
     template_contents.update({
         'has_origin_safe_method_setter': any(
             method['is_check_security_for_frame'] and not method['is_read_only']
             for method in methods),
         'has_method_configuration': any(method['do_generate_method_configuration'] for method in methods),
         'has_per_context_enabled_methods': any(method['per_context_enabled_function'] for method in methods),
         'methods': methods,
     })
 
@@ skipping 83 matching lines @@
     """
     assert len(overloads) > 1  # only apply to overloaded names
     for index, method in enumerate(overloads, 1):
         method['overload_index'] = index
 
     effective_overloads_by_length = effective_overload_set_by_length(overloads)
     lengths = [length for length, _ in effective_overloads_by_length]
 
     return {
         'deprecate_all_as': common_value(overloads, 'deprecate_as'),  # [DeprecateAs]
+        'do_not_check_signature_all': common_value(overloads, 'do_not_check_signature'),
         'length_tests_methods': length_tests_methods(effective_overloads_by_length),
         'minarg': lengths[0],
         # 1. Let maxarg be the length of the longest type list of the
         # entries in S.
         'maxarg': lengths[-1],
         'measure_all_as': common_value(overloads, 'measure_as'),  # [MeasureAs]
+        'per_context_enabled_function_all': common_value(overloads, 'per_context_enabled_function'),  # [PerContextEnabled]
+        'runtime_enabled_function_all': common_value(overloads, 'runtime_enabled_function'),  # [RuntimeEnabled]
         'valid_arities': lengths
             # Only need to report valid arities if there is a gap in the
             # sequence of possible lengths, otherwise invalid length means
             # "not enough arguments".
             if lengths[-1] - lengths[0] != len(lengths) - 1 else None,
     }
 
 
 def effective_overload_set(F):
     """Returns the effective overload set of an overloaded function.
@@ skipping 302 matching lines @@
             # • a numeric type
             try:
                 method = next(method for idl_type, method in idl_types_methods
                               if idl_type.is_numeric_type)
                 test = '%s->IsNumber()' % cpp_value
                 yield test, method
             except StopIteration:
                 pass
 
     # (Perform automatic type conversion, in order. If any of these match,
-    # that’s the end, and no other tests are needed.)
+    # that’s the end, and no other tests are needed.) To keep this code simple,
+    # we rely on the C++ compiler's dead code elimination to deal with the
+    # redundancy if both cases below trigger.
 
     # 11. Otherwise: if there is an entry in S that has one of the following
     # types at position i of its type list,
     # • DOMString
     # • an enumeration type
     try:
         method = next(method for idl_type, method in idl_types_methods
                       if idl_type.name == 'String' or idl_type.is_enum)
         yield 'true', method
-        return
     except StopIteration:
         pass
 
     # 12. Otherwise: if there is an entry in S that has one of the following
     # types at position i of its type list,
     # • a numeric type
     try:
         method = next(method for idl_type, method in idl_types_methods
                       if idl_type.is_numeric_type)
         yield 'true', method
-        return
     except StopIteration:
         pass
 
 
 ################################################################################
 # Utility functions
 ################################################################################
 
 def Counter(iterable):
     # Once using Python 2.7, using collections.Counter
@@ skipping 285 matching lines @@
         deleter = next(
             method
             for method in interface.operations
             if ('deleter' in method.specials and
                 len(method.arguments) == 1 and
                 str(method.arguments[0].idl_type) == 'DOMString'))
     except StopIteration:
         return None
 
     return property_deleter(deleter)