OLD | NEW |
---|---|
(Empty) | |
1 // Copyright 2014 the V8 project authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef V8_UNSCOPABLES_H_ | |
rossberg
2014/08/06 09:53:02
I don't think it's worth putting this into an extr
arv (Not doing code reviews)
2014/08/06 15:08:28
Agreed. Now that it is only used in one place.
I
| |
6 #define V8_UNSCOPABLES_H_ | |
7 | |
8 #include "src/isolate.h" | |
9 #include "src/lookup.h" | |
10 #include "src/objects.h" | |
11 #include "src/prototype.h" | |
12 | |
13 namespace v8 { | |
14 namespace internal { | |
15 | |
16 /** | |
17 * Lookups a property in an object environment, taking the unscopables into | |
18 * account. This is used For HasBinding spec algorithms for ObjectEnvironment. | |
19 */ | |
20 static Maybe<PropertyAttributes> UnscopableLookup(LookupIterator* it) { | |
21 Isolate* isolate = it->isolate(); | |
22 PropertyAttributes attrs; | |
23 if (!JSReceiver::GetPropertyAttributes(it).ToValue(&attrs)) { | |
rossberg
2014/08/06 09:53:02
I think it's clearer and simpler to avoid ToValue
arv (Not doing code reviews)
2014/08/06 15:08:28
Done.
| |
24 DCHECK(isolate->has_pending_exception()); | |
25 return Maybe<PropertyAttributes>(); | |
26 } | |
27 if (attrs == ABSENT) return maybe(ABSENT); | |
28 | |
29 Handle<Symbol> unscopables_symbol( | |
30 isolate->native_context()->unscopables_symbol(), isolate); | |
31 Handle<Object> receiver = it->GetReceiver(); | |
32 Handle<Object> unscopables; | |
33 MaybeHandle<Object> maybe_unscopables = | |
34 Object::GetProperty(receiver, unscopables_symbol); | |
35 if (!maybe_unscopables.ToHandle(&unscopables)) { | |
36 return Maybe<PropertyAttributes>(); | |
37 } | |
38 if (!unscopables->IsSpecObject()) return maybe(attrs); | |
39 bool blacklist; | |
40 if (!JSReceiver::HasProperty(Handle<JSReceiver>::cast(unscopables), | |
41 it->name()).ToValue(&blacklist)) { | |
42 DCHECK(isolate->has_pending_exception()); | |
43 return Maybe<PropertyAttributes>(); | |
44 } | |
45 if (blacklist) return maybe(ABSENT); | |
46 return maybe(attrs); | |
47 } | |
48 } | |
49 | |
50 } // namespace v8::internal | |
51 | |
52 #endif // V8_UNSCOPABLES_H_ | |
OLD | NEW |