Method isHexDigit

src/main/java/org/dynjs/parser/js/Lexer.java:541–543

(int c)

    }

    private boolean isHexDigit(int c) {
        return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
    }

    public Token regexpLiteral() {
        StringBuilder text = new StringBuilder();