Antlr.Runtime.LegacyCommonTokenStream.FillBuffer C# (CSharp) Method

        public virtual void FillBuffer()
        {
            // fast return if the buffer is already full
            if ( p != -1 )
                return;

            int index = 0;
            IToken t = _tokenSource.NextToken();
            while ( t != null && t.Type != CharStreamConstants.EndOfFile )
            {
                bool discard = false;
                // is there a channel override for token type?
                int channelI;
                if ( channelOverrideMap != null && channelOverrideMap.TryGetValue( t.Type, out channelI ) )
                    t.Channel = channelI;

                //if ( channelOverrideMap != null && channelOverrideMap.ContainsKey( t.getType() ) )
                //{
                //    object channelI = channelOverrideMap.get( t.getType() );
                //    if ( channelI != null )
                //    {
                //        t.setChannel( (int)channelI );
                //    }
                //}
                if ( discardSet != null &&
                     discardSet.Contains( t.Type ) )
                {
                    discard = true;
                }
                else if ( discardOffChannelTokens && t.Channel != this.channel )
                {
                    discard = true;
                }
                if ( !discard )
                {
                    t.TokenIndex = index;
                    tokens.Add( t );
                    index++;
                }
                t = _tokenSource.NextToken();
            }
            // leave p pointing at first token on channel
            p = 0;
            p = SkipOffTokenChannels( p );
        }