Add toDouble() helper, and use toFloat()/toDouble() for conversions

Source/bindings/scripts/v8_types.py

 # Copyright (C) 2013 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
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 430 matching lines @@
 # V8 -> C++
 ################################################################################
 
 V8_VALUE_TO_CPP_VALUE = {
     # Basic
     'Date': 'toCoreDate({v8_value})',
     'DOMString': '{v8_value}',
     'ByteString': 'toByteString({arguments})',
     'ScalarValueString': 'toScalarValueString({arguments})',
     'boolean': '{v8_value}->BooleanValue()',
-    'float': 'static_cast<float>({v8_value}->NumberValue())',
-    'unrestricted float': 'static_cast<float>({v8_value}->NumberValue())',
-    'double': 'static_cast<double>({v8_value}->NumberValue())',
-    'unrestricted double': 'static_cast<double>({v8_value}->NumberValue())',
+    'float': 'toFloat({arguments})',
+    'unrestricted float': 'toFloat({arguments})',
+    'double': 'toDouble({arguments})',
+    'unrestricted double': 'toDouble({arguments})',
     'byte': 'toInt8({arguments})',
     'octet': 'toUInt8({arguments})',
     'short': 'toInt16({arguments})',
     'unsigned short': 'toUInt16({arguments})',
     'long': 'toInt32({arguments})',
     'unsigned long': 'toUInt32({arguments})',
     'long long': 'toInt64({arguments})',
     'unsigned long long': 'toUInt64({arguments})',
     # Interface types
     'CompareHow': 'static_cast<Range::CompareHow>({v8_value}->Int32Value())',
     'Dictionary': 'Dictionary({v8_value}, {isolate})',
     'EventTarget': 'V8DOMWrapper::isDOMWrapper({v8_value}) ? toWrapperTypeInfo(v8::Handle<v8::Object>::Cast({v8_value}))->toEventTarget(v8::Handle<v8::Object>::Cast({v8_value})) : 0',
     'NodeFilter': 'toNodeFilter({v8_value}, info.Holder(), ScriptState::current({isolate}))',
     'Promise': 'ScriptPromise::cast(ScriptState::current({isolate}), {v8_value})',
     'SerializedScriptValue': 'SerializedScriptValue::create({v8_value}, {isolate})',
     'ScriptValue': 'ScriptValue(ScriptState::current({isolate}), {v8_value})',
     'Window': 'toDOMWindow({v8_value}, {isolate})',
     'XPathNSResolver': 'toXPathNSResolver({v8_value}, {isolate})',
 }
 
 
 def v8_conversion_needs_exception_state(idl_type):
-    return (idl_type.is_integer_type or
+    return (idl_type.is_numeric_type or
             idl_type.is_dictionary or
             idl_type.name in ('ByteString', 'ScalarValueString'))
 
 IdlType.v8_conversion_needs_exception_state = property(v8_conversion_needs_exception_state)
 
 
 def v8_value_to_cpp_value(idl_type, extended_attributes, v8_value, index, isolate):
     if idl_type.name == 'void':
         return ''
 
@@ skipping 333 matching lines @@
 
 
 def is_explicit_nullable(idl_type):
     # Nullable type that isn't implicit nullable (see above.) For such types,
     # we use Nullable<T> or similar explicit ways to represent a null value.
     return idl_type.is_nullable and not idl_type.is_implicit_nullable
 
 IdlTypeBase.is_implicit_nullable = property(is_implicit_nullable)
 IdlUnionType.is_implicit_nullable = False
 IdlTypeBase.is_explicit_nullable = property(is_explicit_nullable)