Bug 159203

Summary: Use Unicode 9’s `ID_Start` & `ID_Continue` for identifiers
Product: WebKit Reporter: Mathias Bynens <mathias>
Component: JavaScriptCoreAssignee: Yusuke Suzuki <ysuzuki>
Status: NEW    
Severity: Normal CC: mathias, msaboff, ysuzuki
Priority: P2    
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugzilla.mozilla.org/show_bug.cgi?id=1282724
https://bugs.chromium.org/p/v8/issues/detail?id=5155
Attachments:
Description Flags
Node.js script that outputs lists of new `ID_Start` and `ID_Continue` symbols
none
results.js none

Mathias Bynens
Reported 2016-06-28 02:32:40 PDT
* Unicode 8 has 2,518 `ID_Start` symbols; Unicode 9 has 2,669, i.e. 151 more (no removals). * Unicode 8 has 109,830 `ID_Continue` symbols; Unicode 9 has 117,007, i.e. 7,177 more (no removals). E.g. these should not throw per Unicode 9: Function('var \u{1E943}'); // new ID_Start Function('var _\u{1E959}'); // new ID_Continue I’ve attached `results.js` which contains the full list of new `ID_Start` and `ID_Continue` symbols in Unicode 9, and the Node.js script used to generate it.
Attachments
Node.js script that outputs lists of new `ID_Start` and `ID_Continue` symbols (536 bytes, text/javascript)
2016-06-28 02:33 PDT, Mathias Bynens 		no flags
Details
results.js (198.34 KB, text/javascript)
2016-06-28 02:33 PDT, Mathias Bynens 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Mathias Bynens
Comment 1 2016-06-28 02:33:21 PDT
Created attachment 282228 [details] Node.js script that outputs lists of new `ID_Start` and `ID_Continue` symbols
Mathias Bynens
Comment 2 2016-06-28 02:33:36 PDT
Created attachment 282229 [details] results.js
Mathias Bynens
Comment 3 2016-06-28 02:41:36 PDT
Bugzilla won’t allow me to add https://github.com/Microsoft/ChakraCore/issues/1208 to the “See also” list. Can that be fixed?
Alexey Proskuryakov
Comment 4 2016-06-28 20:09:11 PDT
Per <http://www.ecma-international.org/ecma-262/7.0/>, "A conforming implementation of ECMAScript must interpret source text input in conformance with the Unicode Standard, Version 8.0.0 or later and ISO/IEC 10646".
Mathias Bynens
Comment 5 2016-06-28 23:32:45 PDT
The intent is to use the latest available Unicode version. See https://github.com/tc39/ecma262/pull/620 for some discussion.
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