private EmitNodeVisitor(EmitExpressionVisitor expressionVisitor) : base(expressionVisitor)
{
_expressionVisitor = expressionVisitor;
}
public bool BeforeVisit(Statement statement)
{
var expression = statement.Expression;
var iterationExpression = expression as IterationExpression;
if (iterationExpression != null)
{
var scope = new Scope();
_scopes.Push(scope);
var visitor = new EmitExpressionVisitor(_dataBinder, new NullHelperBinder());
iterationExpression.Expression.Accept(visitor);
var context = _dataBinder.Context();
IEvaluator<IEnumerable> evaluator;
if (!context.TryCreateEvaluation(out evaluator))
return false;
Action<TextWriter, IDataContext, IRenderingContext> ext = (writer, dataContext, renderingContext) =>
{
var items = evaluator.Evaluate(dataContext);
foreach (var item in items)
{
}
};
scope.Elements.Add(ext);
//IEvaluator<string> evaluator;
//if (result.TryCreateEvaluation(out evaluator))
//{
// scope.Elements.Add((writer, dataContext, renderingContext) =>
// {
// var value = evaluator.Evaluate(dataContext);
// writer.Write(value);
// });
//}
}
return true;
}