NCalcParser.expressionList C# (CSharp) Method

    public NCalcParser.expressionList_return expressionList()
    {
        NCalcParser.expressionList_return retval = new NCalcParser.expressionList_return();
        retval.Start = input.LT(1);

        CommonTree root_0 = null;

        IToken char_literal43 = null;
        NCalcParser.logicalExpression_return first = null;

        NCalcParser.logicalExpression_return follow = null;

        CommonTree char_literal43_tree=null;

        List<LogicalExpression> expressions = new List<LogicalExpression>();

        try
        {
            // C:\\Users\\s.ros\\Documents\\Développement\\NCalc\\Grammar\\NCalc.g:225:2: (first= logicalExpression ( ',' follow= logicalExpression )* )
            // C:\\Users\\s.ros\\Documents\\Développement\\NCalc\\Grammar\\NCalc.g:225:4: first= logicalExpression ( ',' follow= logicalExpression )*
            {
                root_0 = (CommonTree)adaptor.GetNilNode();

                PushFollow(FOLLOW_logicalExpression_in_expressionList966);
                first = logicalExpression();
                state.followingStackPointer--;

                adaptor.AddChild(root_0, first.Tree);
                expressions.Add(((first != null) ? first.value : null));
                // C:\\Users\\s.ros\\Documents\\Développement\\NCalc\\Grammar\\NCalc.g:225:62: ( ',' follow= logicalExpression )*
                do
                {
                    int alt22 = 2;
                    int LA22_0 = input.LA(1);

                    if ( (LA22_0 == 48) )
                    {
                        alt22 = 1;
                    }

                    switch (alt22)
                    {
                        case 1 :
                            // C:\\Users\\s.ros\\Documents\\Développement\\NCalc\\Grammar\\NCalc.g:225:64: ',' follow= logicalExpression
                            {
                                char_literal43=(IToken)Match(input,48,FOLLOW_48_in_expressionList973);
                                    char_literal43_tree = (CommonTree)adaptor.Create(char_literal43);
                                    adaptor.AddChild(root_0, char_literal43_tree);

                                PushFollow(FOLLOW_logicalExpression_in_expressionList977);
                                follow = logicalExpression();
                                state.followingStackPointer--;

                                adaptor.AddChild(root_0, follow.Tree);
                                expressions.Add(((follow != null) ? follow.value : null));

                            }
                            break;

                        default:
                            goto loop22;
                    }
                } while (true);

                loop22:
                    ;	// Stops C# compiler whining that label 'loop22' has no statements

                 retval.value =  expressions;

            }

            retval.Stop = input.LT(-1);

                retval.Tree = (CommonTree)adaptor.RulePostProcessing(root_0);
                adaptor.SetTokenBoundaries(retval.Tree, (IToken) retval.Start, (IToken) retval.Stop);
        }
        catch (RecognitionException re)
        {
            ReportError(re);
            Recover(input,re);
        // Conversion of the second argument necessary, but harmless
        retval.Tree = (CommonTree)adaptor.ErrorNode(input, (IToken) retval.Start, input.LT(-1), re);

        }
        finally
        {
        }
        return retval;
    }