Boo.Lang.Parser.BooParserBase.argument C# (CSharp) Метод

        protected void argument(
		INodeWithArguments node
	)
        {
            Expression value = null;
                ExpressionPair pair = null;

            try {      // for error handling
            bool synPredMatched658 = false;
            if (((tokenSet_5_.member(LA(1))) && (tokenSet_125_.member(LA(2)))))
            {
                int _m658 = mark();
                synPredMatched658 = true;
                inputState.guessing++;
                try {
                    {
                        expression_pair();
                    }
                }
                catch (RecognitionException)
                {
                    synPredMatched658 = false;
                }
                rewind(_m658);
                inputState.guessing--;
            }
            if ( synPredMatched658 )
            {
                {
                    pair=expression_pair();
                    if (0==inputState.guessing)
                    {
                        if (pair != null) node.NamedArguments.Add(pair);
                    }
                }
            }
            else if ((tokenSet_5_.member(LA(1))) && (tokenSet_126_.member(LA(2)))) {
                {
                    value=expression();
                    if (0==inputState.guessing)
                    {
                        if (value != null) node.Arguments.Add(value);
                    }
                }
            }
            else
            {
                throw new NoViableAltException(LT(1), getFilename());
            }

            }
            catch (RecognitionException ex)
            {
            if (0 == inputState.guessing)
            {
                reportError(ex, "argument");
                recover(ex,tokenSet_85_);
            }
            else
            {
                throw ex;
            }
            }
        }