ES3Parser.arguments C# (CSharp) Method

    public ES3Parser.arguments_return arguments() // throws RecognitionException [1]
    {   
        ES3Parser.arguments_return retval = new ES3Parser.arguments_return();
        retval.Start = input.LT(1);

        object root_0 = null;

        IToken LPAREN22 = null;
        IToken COMMA23 = null;
        IToken RPAREN24 = null;
        ES3Parser.assignmentExpression_return first = default(ES3Parser.assignmentExpression_return);

        ES3Parser.assignmentExpression_return follow = default(ES3Parser.assignmentExpression_return);


        object LPAREN22_tree=null;
        object COMMA23_tree=null;
        object RPAREN24_tree=null;


        	retval.value =  new List<Expression>();

        try 
    	{
            // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1047:2: ( LPAREN (first= assignmentExpression ( COMMA follow= assignmentExpression )* )? RPAREN )
            // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1047:4: LPAREN (first= assignmentExpression ( COMMA follow= assignmentExpression )* )? RPAREN
            {
            	root_0 = (object)adaptor.GetNilNode();

            	LPAREN22=(IToken)Match(input,LPAREN,FOLLOW_LPAREN_in_arguments3581); 
            		LPAREN22_tree = (object)adaptor.Create(LPAREN22);
            		adaptor.AddChild(root_0, LPAREN22_tree);

            	// C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1047:11: (first= assignmentExpression ( COMMA follow= assignmentExpression )* )?
            	int alt17 = 2;
            	int LA17_0 = input.LA(1);

            	if ( ((LA17_0 >= NULL && LA17_0 <= FALSE) || LA17_0 == DELETE || LA17_0 == FUNCTION || LA17_0 == NEW || LA17_0 == THIS || LA17_0 == TYPEOF || LA17_0 == VOID || LA17_0 == LBRACE || LA17_0 == LPAREN || LA17_0 == LBRACK || (LA17_0 >= ADD && LA17_0 <= SUB) || (LA17_0 >= INC && LA17_0 <= DEC) || (LA17_0 >= NOT && LA17_0 <= INV) || (LA17_0 >= Identifier && LA17_0 <= StringLiteral) || LA17_0 == RegularExpressionLiteral || (LA17_0 >= DecimalLiteral && LA17_0 <= HexIntegerLiteral)) )
            	{
            	    alt17 = 1;
            	}
            	switch (alt17) 
            	{
            	    case 1 :
            	        // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1047:13: first= assignmentExpression ( COMMA follow= assignmentExpression )*
            	        {
            	        	PushFollow(FOLLOW_assignmentExpression_in_arguments3587);
            	        	first = assignmentExpression();
            	        	state.followingStackPointer--;

            	        	adaptor.AddChild(root_0, first.Tree);
            	        	 retval.value.Add(first.value); 
            	        	// C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1047:69: ( COMMA follow= assignmentExpression )*
            	        	do 
            	        	{
            	        	    int alt16 = 2;
            	        	    int LA16_0 = input.LA(1);

            	        	    if ( (LA16_0 == COMMA) )
            	        	    {
            	        	        alt16 = 1;
            	        	    }


            	        	    switch (alt16) 
            	        		{
            	        			case 1 :
            	        			    // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1047:71: COMMA follow= assignmentExpression
            	        			    {
            	        			    	COMMA23=(IToken)Match(input,COMMA,FOLLOW_COMMA_in_arguments3593); 
            	        			    		COMMA23_tree = (object)adaptor.Create(COMMA23);
            	        			    		adaptor.AddChild(root_0, COMMA23_tree);

            	        			    	PushFollow(FOLLOW_assignmentExpression_in_arguments3597);
            	        			    	follow = assignmentExpression();
            	        			    	state.followingStackPointer--;

            	        			    	adaptor.AddChild(root_0, follow.Tree);
            	        			    	 retval.value.Add(follow.value); 

            	        			    }
            	        			    break;

            	        			default:
            	        			    goto loop16;
            	        	    }
            	        	} while (true);

            	        	loop16:
            	        		;	// Stops C# compiler whining that label 'loop16' has no statements


            	        }
            	        break;

            	}

            	RPAREN24=(IToken)Match(input,RPAREN,FOLLOW_RPAREN_in_arguments3606); 
            		RPAREN24_tree = (object)adaptor.Create(RPAREN24);
            		adaptor.AddChild(root_0, RPAREN24_tree);


            }

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

            	retval.Tree = (object)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 = (object)adaptor.ErrorNode(input, (IToken) retval.Start, input.LT(-1), re);

        }
        finally 
    	{
        }
        return retval;
    }
    // $ANTLR end "arguments"