23607 - Identifiers don't support escapes

Status: VERIFIED FIXED

(Core :: JavaScript Engine, defect, P3)

Description

[Waldemar Horwat]

ECMA Edition 3 requires the support for escape sequences in identifiers.  For
example, the identifier A could also be specified as \u0041.  JavaScript
currently does not conform to the spec:

js> var \u0041 = 5
1: illegal character:
1: var \u0041 = 5
1: ....^
1: missing variable name:
1: var \u0041 = 5
1: ....^
js> \u0041 = 5
2: illegal character:
2: \u0041 = 5
2: ^
js> A = 5
5
js> \u0041
4: illegal character:
4: \u0041
4: ^

Non-ASCII letters or digits should also be allowed:

js> A\u03B2 = 5
6: illegal character:
6: A\u03B2 = 5
6: .^

However, other non-ASCII characters should be rejected (they are, but for the
wrong reason):

js> \u0020 = 5
7: illegal character:
7: \u0020 = 5
7: ^

Finally, an identifier with escapes that, when unescaped, would become a reserved
word is not itself a reserved word.  Thus, c\u0061se should be a valid identifier
name.

Comment 1

[Mike McCabe]

Passing this one on to Roger.

Comment 2

[Robert Ginda]

testcases ecma_3/Unicode/uc-002-n.js and ecma_3/Unicode/uc-003.js added.

Comment 3

[rogerl (gone)]

Fix checked in.

Comment 4

[Robert Ginda]

Marking Verified.