121541 2013-09-18 00:11:24 -0700 Update identifier syntax to disallow U+2E2F in preparation for ES6 2020-03-13 06:53:34 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED http://mathias.html5.org/tests/javascript/identifiers/ InRadar P2 Normal --- 0 mathias webkit-unassigned annevk ap claude.pache fpizlo ggaren keith_miller mathias m.goleb+bugzilla oliver syoichi webkit-bug-importer ysuzuki oldest_to_newest 930548 0 mathias 2013-09-18 00:11:24 -0700 TC39 discussed http://esdiscuss.org/topic/backwards-compatibility-and-u-2e2f-in-identifier-s and concluded that we should not deviate from Unicode because we don’t want separate lists from Unicode. That means `\u2E2F` and `ⸯ` need to throw when used as identifier. For reference, here’s the same bug ticket for SpiderMonkey: https://bugzilla.mozilla.org/show_bug.cgi?id=917436 And for V8: https://code.google.com/p/v8/issues/detail?id=2892 930691 1 webkit-bug-importer 2013-09-18 11:42:47 -0700 <rdar://problem/15022545> 1074070 2 mathias 2015-03-04 08:31:31 -0800 Some more info & examples of what it means to update to the ES6 grammar for identifiers: https://mathiasbynens.be/notes/javascript-identifiers-es6 1075763 3 mathias 2015-03-09 14:54:12 -0700 Tests based on ES6 and Unicode 5.1.0, i.e. the minimum required Unicode version as per the spec: https://mathias.html5.org/tests/javascript/identifiers/ 1274024 4 claude.pache 2017-02-07 09:18:22 -0800 For reference, the relevant section in the spec is: https://tc39.github.io/ecma262/#prod-IdentifierName 1274665 5 ap 2017-02-08 17:22:17 -0800 Is this still needed for ES6?yus 1274774 6 mathias 2017-02-09 00:05:44 -0800 (In reply to comment #5) > Is this still needed for ES6? Yes. 1629594 7 mathias 2020-03-13 06:53:34 -0700 This seems to have been fixed: ``` $ eshost -sx 'var \u2E2F' #### Chakra SyntaxError: Invalid character #### JavaScriptCore SyntaxError: Invalid unicode escape in identifier: '\u2E2F' #### SpiderMonkey SyntaxError: invalid escape sequence: #### V8, V8 --harmony SyntaxError: Invalid or unexpected token #### XS SyntaxError: invalid character 10 ``` …and… ``` $ eshost -sx 'var ⸯ' #### Chakra SyntaxError: Invalid character #### JavaScriptCore SyntaxError: Invalid character '\u2e2f' #### SpiderMonkey SyntaxError: illegal character: #### V8, V8 --harmony SyntaxError: Invalid or unexpected token #### XS SyntaxError: invalid character 11823 ```