Antlr.Runtime.BitSet.Size C# (CSharp) Method

        public int Size()
        {
            int deg = 0;
            for ( int i = _bits.Length - 1; i >= 0; i-- )
            {
                ulong word = _bits[i];
                if ( word != 0L )
                {
                    for ( int bit = BITS - 1; bit >= 0; bit-- )
                    {
                        if ( ( word & ( 1UL << bit ) ) != 0 )
                        {
                            deg++;
                        }
                    }
                }
            }
            return deg;
        }