@ -8,6 +8,18 @@
* * Non-BMP characters are completely ignored to avoid surrogate pair
* * One can create identifiers containing illegal characters using Unicode
* escape sequences. For example, "abcd\u0020efgh" is not a valid
* identifier, but it is accepted by the parser.
* Both limitations could be resolved, but the costs would likely outweigh
* the benefits.
*  http://www.ecma-international.org/publications/standards/Ecma-262.htm