ES3Parser.expression C# (CSharp) Method

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

        object root_0 = null;

        IToken COMMA80 = null;
        ES3Parser.assignmentExpression_return first = default(ES3Parser.assignmentExpression_return);

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


        object COMMA80_tree=null;


        	var cs = new CommaOperatorStatement();

        try 
    	{
            // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1353:2: (first= assignmentExpression ( COMMA follow= assignmentExpression )* )
            // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1353:4: first= assignmentExpression ( COMMA follow= assignmentExpression )*
            {
            	root_0 = (object)adaptor.GetNilNode();

            	PushFollow(FOLLOW_assignmentExpression_in_expression5077);
            	first = assignmentExpression();
            	state.followingStackPointer--;

            	adaptor.AddChild(root_0, first.Tree);
            	 retval.value =  first.value; 
            	// C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1353:57: ( COMMA follow= assignmentExpression )*
            	do 
            	{
            	    int alt54 = 2;
            	    int LA54_0 = input.LA(1);

            	    if ( (LA54_0 == COMMA) )
            	    {
            	        alt54 = 1;
            	    }


            	    switch (alt54) 
            		{
            			case 1 :
            			    // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1353:59: COMMA follow= assignmentExpression
            			    {
            			    	COMMA80=(IToken)Match(input,COMMA,FOLLOW_COMMA_in_expression5083); 
            			    		COMMA80_tree = (object)adaptor.Create(COMMA80);
            			    		adaptor.AddChild(root_0, COMMA80_tree);

            			    	 if(cs.Statements.Count == 0) { cs.Statements.Add(retval.value); retval.value =  cs; } 
            			    	PushFollow(FOLLOW_assignmentExpression_in_expression5089);
            			    	follow = assignmentExpression();
            			    	state.followingStackPointer--;

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

            			    }
            			    break;

            			default:
            			    goto loop54;
            	    }
            	} while (true);

            	loop54:
            		;	// Stops C# compiler whining that label 'loop54' has no statements


            }

            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 "expression"

        public static JsExpression ParseExpression(string source)
        {
            var lex = new ES3Lexer(new ANTLRStringStream(source));
            CommonTokenStream tokens = new CommonTokenStream(lex);
            var parser = new ES3Parser(tokens);

            var r    = parser.expression();
            var tree = new ES3Walker(new CommonTreeNodeStream(r.Tree));

            return(tree.expression());
        }