Tools.Lexer.Match C# (CSharp) 메소드

        bool Match(ref TOKEN tok,Dfa dfa)
        {
            char ch=PeekChar();
            int op=m_pch, mark=0;
            Dfa next;

            if (m_debug)
            {
                Console.Write("state {0} with ",dfa.m_state);
                if (char.IsLetterOrDigit(ch)||char.IsPunctuation(ch))
                    Console.WriteLine(ch);
                else
                    Console.WriteLine("#"+(int)ch);
            }
            if (dfa.m_actions!=null)
            {
                mark = Mark();
            }
            if (// ch==0 ||
                (next=((Dfa)dfa.m_map[m_tokens.Filter(ch)]))==null)
            {
                if (m_debug)
                    Console.Write("{0} no arc",dfa.m_state);
                if (dfa.m_actions!=null)
                {
                    if (m_debug)
                        Console.WriteLine(" terminal");
                    return TryActions(dfa,ref tok); // fails on REJECT
                }
                if (m_debug)
                    Console.WriteLine(" fails");
                return false;
            }
            Advance();
            if (!Match(ref tok, next))
            { // rest of string fails
                if (m_debug)
                    Console.WriteLine("back to {0} with {1}",dfa.m_state,ch);
                if (dfa.m_actions!=null)
                { // this is still okay at a terminal
                    if (m_debug)
                        Console.WriteLine("{0} succeeds",dfa.m_state);
                    Restore(mark);
                    return TryActions(dfa,ref tok);
                }
                if (m_debug)
                    Console.WriteLine("{0} fails",dfa.m_state);
                return false;
            }
            if (dfa.m_reswds>=0)
            {
                ((ResWds)m_tokens.reswds[dfa.m_reswds]).Check(this,ref tok);
            }
            if (m_debug)
            {
                Console.Write("{0} matched ",dfa.m_state);
                if (m_pch<=m_buf.Length)
                    Console.WriteLine(m_buf.Substring(op,m_pch-op));
                else
                    Console.WriteLine(m_buf.Substring(op));
            }
            return true;
        }