}
});
} : function(str) {
- return str.replace(/[\ud800-\udbff](?![\udc00-\udfff])/g, function(ch) {
- return "\\u" + ch.charCodeAt(0).toString(16);
- }).replace(/(^|[^\ud800-\udbff])([\udc00-\udfff])/g, function(match, prefix, ch) {
- return prefix + "\\u" + ch.charCodeAt(0).toString(16);
- });
+ var s = "";
+ for (var i = 0, len = str.length; i < len; i++) {
+ if (is_surrogate_pair_head(str[i]) && !is_surrogate_pair_tail(str[i + 1])
+ || is_surrogate_pair_tail(str[i]) && !is_surrogate_pair_head(str[i - 1])) {
+ s += "\\u" + str.charCodeAt(i).toString(16);
+ } else {
+ s += str[i];
+ }
+ }
+ return s;
};
function make_string(str, quote) {
|| (code >= 0xaa && UNICODE.letter.test(String.fromCharCode(code)));
};
+function is_surrogate_pair_head(code) {
+ if (typeof code == "string")
+ code = code.charCodeAt(0);
+ return code >= 0xd800 && code <= 0xdbff;
+}
+
+function is_surrogate_pair_tail(code) {
+ if (typeof code == "string")
+ code = code.charCodeAt(0);
+ return code >= 0xdc00 && code <= 0xdfff;
+}
+
function is_digit(code) {
return code >= 48 && code <= 57;
};
}
expect_exact: 'console.log("\ud83d\ude00","\\ud83d@\\ude00");'
}
+
+issue_2569: {
+ input: {
+ new RegExp("[\udc42-\udcaa\udd74-\udd96\ude45-\ude4f\udea3-\udecc]");
+ }
+ expect_exact: 'new RegExp("[\\udc42-\\udcaa\\udd74-\\udd96\\ude45-\\ude4f\\udea3-\\udecc]");'
+}