Status: Assigned
Owner: [email protected]
CC: [email protected], [email protected]
Labels: Type-Bug Priority-Medium Harmony
New issue 3617 by [email protected]: Supplementary characters are
allowed as identifier names in ES6
https://code.google.com/p/v8/issues/detail?id=3617
ES6 allows supplementary characters (i.e. characters with code point >
0xFFFF)
in identifiers, while ES5 doesn't. See
https://people.mozilla.org/~jorendorff/es6-draft.html#sec-names-and-keywords,
and note how `IdentifierStart` refers to `UnicodeIDStart` which is defined
as
'any Unicode code point with the Unicode property "ID_Start" or
"Other_ID_Start"' -- this doesn't exclude supplementary code points. But ES5
did:
https://bugs.ecmascript.org/show_bug.cgi?id=469#c0 The same thing goes for
`IdentifierPart` and `UnicodeIDContinue`.
To illustrate the difference in code: compare
https://gist.github.com/mathiasbynens/6334847#file-javascript-identifier-rege...
(ES5) with
https://gist.github.com/mathiasbynens/6334847#file-javascript-identifier-rege...
(ES6).
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