ES3Parser.functionExpression C# (CSharp) Method

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

        object root_0 = null;

        IToken name = null;
        IToken FUNCTION177 = null;
        ES3Parser.formalParameterList_return formalParameterList178 = default(ES3Parser.formalParameterList_return);

        ES3Parser.functionBody_return functionBody179 = default(ES3Parser.functionBody_return);


        object name_tree=null;
        object FUNCTION177_tree=null;


        	retval.value =  new FunctionExpression();

        try 
    	{
            // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1812:2: ( FUNCTION (name= Identifier )? formalParameterList functionBody )
            // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1812:4: FUNCTION (name= Identifier )? formalParameterList functionBody
            {
            	root_0 = (object)adaptor.GetNilNode();

            	FUNCTION177=(IToken)Match(input,FUNCTION,FOLLOW_FUNCTION_in_functionExpression6622); 
            		FUNCTION177_tree = (object)adaptor.Create(FUNCTION177);
            		adaptor.AddChild(root_0, FUNCTION177_tree);

            	// C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1812:13: (name= Identifier )?
            	int alt83 = 2;
            	int LA83_0 = input.LA(1);

            	if ( (LA83_0 == Identifier) )
            	{
            	    alt83 = 1;
            	}
            	switch (alt83) 
            	{
            	    case 1 :
            	        // C:\\Users\\s.ros\\Projets\\Jint\\Jint\\ES3.g:1812:14: name= Identifier
            	        {
            	        	name=(IToken)Match(input,Identifier,FOLLOW_Identifier_in_functionExpression6627); 
            	        		name_tree = (object)adaptor.Create(name);
            	        		adaptor.AddChild(root_0, name_tree);

            	        	 retval.value.Name = name.Text; 

            	        }
            	        break;

            	}

            	PushFollow(FOLLOW_formalParameterList_in_functionExpression6634);
            	formalParameterList178 = formalParameterList();
            	state.followingStackPointer--;

            	adaptor.AddChild(root_0, formalParameterList178.Tree);
            	 retval.value.Parameters.AddRange(((formalParameterList178 != null) ? formalParameterList178.value : default(List<string>))) ;
            	PushFollow(FOLLOW_functionBody_in_functionExpression6638);
            	functionBody179 = functionBody();
            	state.followingStackPointer--;

            	adaptor.AddChild(root_0, functionBody179.Tree);
            	 retval.value.Statement = ((functionBody179 != null) ? functionBody179.value : default(Statement)); 

            }

            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 "functionExpression"