NCalcParser.bitwiseOrExpression C# (CSharp) Method

    public NCalcParser.bitwiseOrExpression_return bitwiseOrExpression()
    {
        NCalcParser.bitwiseOrExpression_return retval = new NCalcParser.bitwiseOrExpression_return();
        retval.Start = input.LT(1);

        CommonTree root_0 = null;

        IToken char_literal7 = null;
        NCalcParser.bitwiseXOrExpression_return left = null;

        NCalcParser.bitwiseOrExpression_return right = null;

        CommonTree char_literal7_tree=null;

        BinaryExpressionType type = BinaryExpressionType.Unknown;

        try
        {
            // C:\\Users\\s.ros\\Documents\\Développement\\NCalc\\Grammar\\NCalc.g:109:2: (left= bitwiseXOrExpression ( '|' right= bitwiseOrExpression )* )
            // C:\\Users\\s.ros\\Documents\\Développement\\NCalc\\Grammar\\NCalc.g:109:4: left= bitwiseXOrExpression ( '|' right= bitwiseOrExpression )*
            {
                root_0 = (CommonTree)adaptor.GetNilNode();

                PushFollow(FOLLOW_bitwiseXOrExpression_in_bitwiseOrExpression237);
                left = bitwiseXOrExpression();
                state.followingStackPointer--;

                adaptor.AddChild(root_0, left.Tree);
                 retval.value =  ((left != null) ? left.value : null);
                // C:\\Users\\s.ros\\Documents\\Développement\\NCalc\\Grammar\\NCalc.g:109:56: ( '|' right= bitwiseOrExpression )*
                do
                {
                    int alt4 = 2;
                    int LA4_0 = input.LA(1);

                    if ( (LA4_0 == 25) )
                    {
                        alt4 = 1;
                    }

                    switch (alt4)
                    {
                        case 1 :
                            // C:\\Users\\s.ros\\Documents\\Développement\\NCalc\\Grammar\\NCalc.g:110:4: '|' right= bitwiseOrExpression
                            {
                                char_literal7=(IToken)Match(input,25,FOLLOW_25_in_bitwiseOrExpression246);
                                    char_literal7_tree = (CommonTree)adaptor.Create(char_literal7);
                                    adaptor.AddChild(root_0, char_literal7_tree);

                                 type = BinaryExpressionType.BitwiseOr;
                                PushFollow(FOLLOW_bitwiseOrExpression_in_bitwiseOrExpression256);
                                right = bitwiseOrExpression();
                                state.followingStackPointer--;

                                adaptor.AddChild(root_0, right.Tree);
                                 retval.value =  new BinaryExpression(type, retval.value, ((right != null) ? right.value : null));

                            }
                            break;

                        default:
                            goto loop4;
                    }
                } while (true);

                loop4:
                    ;	// Stops C# compiler whining that label 'loop4' has no statements

            }

            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;
    }