Method unicodeEscape

src/helpers/parser.js:54–59

(s)

            ? new RegExp("[\\p{C}\\p{Mn}\\p{Mc}]", "gu")
            : null;
        function unicodeEscape(s) {
            if (nonPrintable) {
                return s.replace(nonPrintable,  ch => "\\u{" + hex(ch) + "}");
            }
            return s;
        }

        function literalEscape(s) {
            return unicodeEscape(s