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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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157 class CallbacksDescriptor: public Descriptor { | 157 class CallbacksDescriptor: public Descriptor { |
158 public: | 158 public: |
159 CallbacksDescriptor(String* key, | 159 CallbacksDescriptor(String* key, |
160 Object* foreign, | 160 Object* foreign, |
161 PropertyAttributes attributes, | 161 PropertyAttributes attributes, |
162 int index = 0) | 162 int index = 0) |
163 : Descriptor(key, foreign, attributes, CALLBACKS, index) {} | 163 : Descriptor(key, foreign, attributes, CALLBACKS, index) {} |
164 }; | 164 }; |
165 | 165 |
166 | 166 |
| 167 template <class T> |
| 168 bool IsPropertyDescriptor(T* desc) { |
| 169 switch (desc->type()) { |
| 170 case NORMAL: |
| 171 case FIELD: |
| 172 case CONSTANT_FUNCTION: |
| 173 case HANDLER: |
| 174 case INTERCEPTOR: |
| 175 return true; |
| 176 case CALLBACKS: { |
| 177 Object* callback_object = desc->GetCallbackObject(); |
| 178 // Non-JavaScript (i.e. native) accessors are always a property, otherwise |
| 179 // either the getter or the setter must be an accessor. Put another way: |
| 180 // If we only see map transitions and holes in a pair, this is not a |
| 181 // property. |
| 182 return (!callback_object->IsAccessorPair() || |
| 183 AccessorPair::cast(callback_object)->ContainsAccessor()); |
| 184 } |
| 185 case MAP_TRANSITION: |
| 186 case ELEMENTS_TRANSITION: |
| 187 case CONSTANT_TRANSITION: |
| 188 case NULL_DESCRIPTOR: |
| 189 return false; |
| 190 } |
| 191 UNREACHABLE(); // keep the compiler happy |
| 192 return false; |
| 193 } |
| 194 |
| 195 |
167 class LookupResult BASE_EMBEDDED { | 196 class LookupResult BASE_EMBEDDED { |
168 public: | 197 public: |
169 explicit LookupResult(Isolate* isolate) | 198 explicit LookupResult(Isolate* isolate) |
170 : isolate_(isolate), | 199 : isolate_(isolate), |
171 next_(isolate->top_lookup_result()), | 200 next_(isolate->top_lookup_result()), |
172 lookup_type_(NOT_FOUND), | 201 lookup_type_(NOT_FOUND), |
173 holder_(NULL), | 202 holder_(NULL), |
174 cacheable_(true), | 203 cacheable_(true), |
175 details_(NONE, NORMAL) { | 204 details_(NONE, NORMAL) { |
176 isolate->SetTopLookupResult(this); | 205 isolate->SetTopLookupResult(this); |
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254 return details_; | 283 return details_; |
255 } | 284 } |
256 | 285 |
257 bool IsReadOnly() { return details_.IsReadOnly(); } | 286 bool IsReadOnly() { return details_.IsReadOnly(); } |
258 bool IsDontDelete() { return details_.IsDontDelete(); } | 287 bool IsDontDelete() { return details_.IsDontDelete(); } |
259 bool IsDontEnum() { return details_.IsDontEnum(); } | 288 bool IsDontEnum() { return details_.IsDontEnum(); } |
260 bool IsDeleted() { return details_.IsDeleted(); } | 289 bool IsDeleted() { return details_.IsDeleted(); } |
261 bool IsFound() { return lookup_type_ != NOT_FOUND; } | 290 bool IsFound() { return lookup_type_ != NOT_FOUND; } |
262 bool IsHandler() { return lookup_type_ == HANDLER_TYPE; } | 291 bool IsHandler() { return lookup_type_ == HANDLER_TYPE; } |
263 | 292 |
264 // Is the result is a property excluding transitions and the null | 293 // Is the result is a property excluding transitions and the null descriptor? |
265 // descriptor? | |
266 bool IsProperty() { | 294 bool IsProperty() { |
267 return IsFound() && IsRealProperty(GetPropertyDetails().type()); | 295 return IsFound() && IsPropertyDescriptor(this); |
268 } | 296 } |
269 | 297 |
270 bool IsCacheable() { return cacheable_; } | 298 bool IsCacheable() { return cacheable_; } |
271 void DisallowCaching() { cacheable_ = false; } | 299 void DisallowCaching() { cacheable_ = false; } |
272 | 300 |
273 Object* GetLazyValue() { | 301 Object* GetLazyValue() { |
274 switch (type()) { | 302 switch (type()) { |
275 case FIELD: | 303 case FIELD: |
276 return holder()->FastPropertyAt(GetFieldIndex()); | 304 return holder()->FastPropertyAt(GetFieldIndex()); |
277 case NORMAL: { | 305 case NORMAL: { |
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375 JSReceiver* holder_; | 403 JSReceiver* holder_; |
376 int number_; | 404 int number_; |
377 bool cacheable_; | 405 bool cacheable_; |
378 PropertyDetails details_; | 406 PropertyDetails details_; |
379 }; | 407 }; |
380 | 408 |
381 | 409 |
382 } } // namespace v8::internal | 410 } } // namespace v8::internal |
383 | 411 |
384 #endif // V8_PROPERTY_H_ | 412 #endif // V8_PROPERTY_H_ |
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