147925 2015-08-11 23:32:05 -0700 [ES6] Implement Reflect.get 2015-08-17 11:56:56 -0700 1 1 1 Unclassified WebKit New Bugs 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 ysuzuki ysuzuki darin ggaren oliver rniwa saam sam oldest_to_newest 1116902 0 ysuzuki 2015-08-11 23:32:05 -0700 [ES6] Implement Reflect.get 1116903 1 258809 ysuzuki 2015-08-11 23:33:22 -0700 Created attachment 258809 Patch 1116904 2 258809 ysuzuki 2015-08-11 23:34:28 -0700 Comment on attachment 258809 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=258809&action=review > Source/JavaScriptCore/runtime/SparseArrayValueMap.cpp:-154 > -} This is only the place that does not use the PropertySlot::thisValue() as the |this| value. But this code is not used anymore, so just drop it. 1118161 3 258809 ggaren 2015-08-17 11:16:42 -0700 Comment on attachment 258809 Patch Should we be implementing these in JavaScript? Seems like it might be faster that way. 1118166 4 ysuzuki 2015-08-17 11:22:05 -0700 (In reply to comment #3) > Comment on attachment 258809 [details] > Patch > > Should we be implementing these in JavaScript? Seems like it might be faster > that way. Reflect.get can take the receiver as its optional argument. `Reflect.get ( target, propertyKey [ , receiver ])` When the receiver is specified, we need to call the getter with the receiver as the |this|. So, how about the mixed implementation? in JS: if (receiver === target) return target[propertyName]; return @getSlowCase(target, propertyKey, receiver); in C++ the above code. http://www.ecma-international.org/ecma-262/6.0/#sec-reflect.get 1118171 5 ggaren 2015-08-17 11:28:34 -0700 > When the receiver is specified, we need to call the getter with the receiver > as the |this|. > So, how about the mixed implementation? > > in JS: > > if (receiver === target) > return target[propertyName]; > return @getSlowCase(target, propertyKey, receiver); Interesting. Ryosuke is working on a similar problem, where the same behavior is required by super.getter. I can see that it would be awkward to override the receiver in JS. Perhaps we should just go with your current patch for now. 1118177 6 ysuzuki 2015-08-17 11:46:34 -0700 (In reply to comment #5) > > When the receiver is specified, we need to call the getter with the receiver > > as the |this|. > > So, how about the mixed implementation? > > > > in JS: > > > > if (receiver === target) > > return target[propertyName]; > > return @getSlowCase(target, propertyKey, receiver); > > Interesting. > > Ryosuke is working on a similar problem, where the same behavior is required > by super.getter. > > I can see that it would be awkward to override the receiver in JS. Perhaps > we should just go with your current patch for now. Oh, that's very nice! Maybe, super.setter = value; also has the same problem. Reflect.set has the receiver argument optionally. Anyway, if Ryosuke is working on this "taking receiver optionally" by adding the byte code, when landing this change, we can easily use it for Reflect.get by adding the byte code intrinsics (maybe @get()?). This makes the Reflect.get written in JS (in the future) and seems cleanest way. So agree with you. In the meantime, I'll land this current C++ implementation patch. When the new byte code is introduced, we'll replace Reflect.get with the JS implementation :) 1118184 7 ysuzuki 2015-08-17 11:56:56 -0700 Committed r188532: <http://trac.webkit.org/changeset/188532> 258809 2015-08-11 23:33:22 -0700 2015-08-17 11:16:42 -0700 Patch bug-147925-20150811233305.patch text/plain 8151 ysuzuki U3VidmVyc2lvbiBSZXZpc2lvbjogMTg4MzE5CmRpZmYgLS1naXQgYS9Tb3VyY2UvSmF2YVNjcmlw dENvcmUvQ2hhbmdlTG9nIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwppbmRleCAz NzUzYWZiMjQ4YTY3MGE4NjIyMDcxZjE5ZDY1ZDA0OWFjZjJhNzFkLi4wOTI3MWFjNTMzZTUyMmMz ZDI5ZDNjZGQ0N2RlNzUxMjBlNWJlNDJmIDEwMDY0NAotLS0gYS9Tb3VyY2UvSmF2YVNjcmlwdENv cmUvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKQEAgLTEs MyArMSwyOSBAQAorMjAxNS0wOC0xMSAgWXVzdWtlIFN1enVraSAgPHV0YXRhbmUudGVhQGdtYWls LmNvbT4KKworICAgICAgICBbRVM2XSBJbXBsZW1lbnQgUmVmbGVjdC5nZXQKKyAgICAgICAgaHR0 cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE0NzkyNQorCisgICAgICAgIFJl 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