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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 (function(global, utils) { | 5 (function(global, utils) { |
6 | 6 |
7 "use strict"; | 7 "use strict"; |
8 | 8 |
9 %CheckIsBootstrapping(); | 9 %CheckIsBootstrapping(); |
10 | 10 |
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145 var name = names[i] | 145 var name = names[i] |
146 if (IS_SYMBOL(name)) continue | 146 if (IS_SYMBOL(name)) continue |
147 var desc = this.getOwnPropertyDescriptor(TO_STRING(name)) | 147 var desc = this.getOwnPropertyDescriptor(TO_STRING(name)) |
148 if (!IS_UNDEFINED(desc) && desc.enumerable) { | 148 if (!IS_UNDEFINED(desc) && desc.enumerable) { |
149 enumerableNames[count++] = names[i] | 149 enumerableNames[count++] = names[i] |
150 } | 150 } |
151 } | 151 } |
152 return enumerableNames | 152 return enumerableNames |
153 } | 153 } |
154 | 154 |
155 // Implements part of ES6 9.5.11 Proxy.[[Enumerate]]: | 155 function DerivedEnumerateTrap() { |
156 // Call the trap, which should return an iterator, exhaust the iterator, | 156 var names = this.getPropertyNames() |
157 // and return an array containing the values. | 157 var enumerableNames = [] |
158 function ProxyEnumerate(trap, handler, target) { | 158 for (var i = 0, count = 0; i < names.length; ++i) { |
159 // 7. Let trapResult be ? Call(trap, handler, «target»). | 159 var name = names[i] |
160 var trap_result = %_Call(trap, handler, target); | 160 if (IS_SYMBOL(name)) continue |
161 // 8. If Type(trapResult) is not Object, throw a TypeError exception. | 161 var desc = this.getPropertyDescriptor(TO_STRING(name)) |
162 if (!IS_SPEC_OBJECT(trap_result)) { | 162 if (!IS_UNDEFINED(desc)) { |
163 throw MakeTypeError(kProxyHandlerReturned, handler, "non-Object", | 163 if (!desc.configurable) { |
164 "enumerate"); | 164 throw MakeTypeError(kProxyPropNotConfigurable, |
| 165 this, name, "getPropertyDescriptor") |
| 166 } |
| 167 if (desc.enumerable) enumerableNames[count++] = names[i] |
| 168 } |
165 } | 169 } |
166 // 9. Return trapResult. | 170 return enumerableNames |
167 var result = []; | 171 } |
168 for (var it = trap_result.next(); !it.done; it = trap_result.next()) { | 172 |
169 var key = it.value; | 173 function ProxyEnumerate(proxy) { |
170 // Not yet spec'ed as of 2015-11-25, but will be spec'ed soon: | 174 var handler = %GetHandler(proxy) |
171 // If the iterator returns a non-string value, throw a TypeError. | 175 if (IS_UNDEFINED(handler.enumerate)) { |
172 if (!IS_STRING(key)) { | 176 return %Apply(DerivedEnumerateTrap, handler, [], 0, 0) |
173 throw MakeTypeError(kProxyHandlerReturned, handler, "non-String", | 177 } else { |
174 "enumerate-iterator"); | 178 return ToNameArray(handler.enumerate(), "enumerate", false) |
175 } | |
176 result.push(key); | |
177 } | 179 } |
178 return result; | |
179 } | 180 } |
180 | 181 |
181 //------------------------------------------------------------------- | 182 //------------------------------------------------------------------- |
182 %SetCode(GlobalProxy, ProxyCreate); | 183 %SetCode(GlobalProxy, ProxyCreate); |
183 | 184 |
184 //Set up non-enumerable properties of the Proxy object. | 185 //Set up non-enumerable properties of the Proxy object. |
185 utils.InstallFunctions(GlobalProxy, DONT_ENUM, [ | 186 utils.InstallFunctions(GlobalProxy, DONT_ENUM, [ |
186 "createFunction", ProxyCreateFunction | 187 "createFunction", ProxyCreateFunction |
187 ]); | 188 ]); |
188 | 189 |
189 // ------------------------------------------------------------------- | 190 // ------------------------------------------------------------------- |
190 // Exports | 191 // Exports |
191 | 192 |
192 utils.Export(function(to) { | 193 utils.Export(function(to) { |
193 to.ProxyDelegateCallAndConstruct = DelegateCallAndConstruct; | 194 to.ProxyDelegateCallAndConstruct = DelegateCallAndConstruct; |
194 to.ProxyDerivedHasOwnTrap = DerivedHasOwnTrap; | 195 to.ProxyDerivedHasOwnTrap = DerivedHasOwnTrap; |
195 to.ProxyDerivedKeysTrap = DerivedKeysTrap; | 196 to.ProxyDerivedKeysTrap = DerivedKeysTrap; |
196 }); | 197 }); |
197 | 198 |
198 %InstallToContext([ | 199 %InstallToContext([ |
199 "derived_get_trap", DerivedGetTrap, | 200 "derived_get_trap", DerivedGetTrap, |
200 "derived_has_trap", DerivedHasTrap, | 201 "derived_has_trap", DerivedHasTrap, |
201 "derived_set_trap", DerivedSetTrap, | 202 "derived_set_trap", DerivedSetTrap, |
202 "proxy_enumerate", ProxyEnumerate, | 203 "proxy_enumerate", ProxyEnumerate, |
203 ]); | 204 ]); |
204 | 205 |
205 }) | 206 }) |
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