Antlr3.Tool.Grammar.GetNFAStateForAltOfDecision C# (CSharp) Method

        public virtual NFAState GetNFAStateForAltOfDecision( NFAState decisionState, int alt )
        {
            if ( decisionState == null || alt <= 0 )
            {
                return null;
            }
            int n = 1;
            NFAState p = decisionState;
            while ( p != null )
            {
                if ( n == alt )
                {
                    return p;
                }
                n++;
                Transition next = p.transition[1];
                p = null;
                if ( next != null )
                {
                    p = (NFAState)next.Target;
                }
            }
            return null;
        }