952985 - \u{nnnnnn} Unicode code point escapes

Status: RESOLVED DUPLICATE of bug 320500

(Core :: JavaScript Engine, defect)

Description

[Tom S. (please needinfo tschuster)]

I am going to do this.

Comment 1

[Tom S. (please needinfo tschuster)]

Attachment: unicode-point

Support these for strings is relatively easy. For identifier however it looks like we might need to extend the IsIdentifierStart and IsIdentifierPart function to support the whole unicode range. I am not sure if there are valid code points for that outside the 0xffff range, but I would assume so. Or maybe I misunderstood something.

Comment 2

[Till Schneidereit [:till]]

It wouldn't be terribly hard to adapt our vm/make_unicode.py script to also parse DerivedCoreProperties.txt and store a flag for ID_Start - which is what we need here.

Comment 3

[Tom S. (please needinfo tschuster)]

I think this would force us to handle the whole Unicode range, instead of just 0 - 0xffff like it's implemented right now. So this really isn't just about parsing some file, and storing a flag. Unless we add a special table just for ID_Start.

Comment 4

[Tom S. (please needinfo tschuster)]

I don't have time for this right now.

Comment 5

[Simon Montagu :smontagu]

Support for \u{nnnnnn} escapes in general was added in bug 320500. Making them work in identifiers per comment 1 seems to be covered by bug 917436.