Antlr4.Runtime.AntlrInputStream.LA C# (CSharp) Метод

        public virtual int LA(int i)
        {
            if (i == 0)
            {
                return 0;
            }
            // undefined
            if (i < 0)
            {
                i++;
                // e.g., translate LA(-1) to use offset i=0; then data[p+0-1]
                if ((p + i - 1) < 0)
                {
                    return IntStreamConstants.EOF;
                }
            }
            // invalid; no char before first char
            if ((p + i - 1) >= n)
            {
                //System.out.println("char LA("+i+")=EOF; p="+p);
                return IntStreamConstants.EOF;
            }
            //System.out.println("char LA("+i+")="+(char)data[p+i-1]+"; p="+p);
            //System.out.println("LA("+i+"); p="+p+" n="+n+" data.length="+data.length);
            return data[p + i - 1];
        }