public override IEnumerable <object> ConvertTokens(IEnumerable <object> sequence)
{
var enumerator = sequence.GetEnumerator();
while (enumerator.MoveNext())
{
var item = enumerator.Current;
if (item is HelperExpression)
{
var helper = item as HelperExpression;
item = GetNext(enumerator);
List <Expression> helperArguments = new List <Expression>();
while ((item is EndExpressionToken) == false)
{
if ((item is Expression) == false)
{
throw new HandlebarsCompilerException(
string.Format("Token '{0}' could not be converted to an expression", item));
}
helperArguments.Add((Expression)item);
item = GetNext(enumerator);
}
yield return(HandlebarsExpression.Helper(
helper.HelperName,
helperArguments));
yield return(item);
}
else
{
yield return(item);
}
}
}
public override IEnumerable <object> ConvertTokens(IEnumerable <object> sequence)
{
var enumerator = sequence.GetEnumerator();
while (enumerator.MoveNext())
{
var item = enumerator.Current;
if (item is StartExpressionToken)
{
yield return(item);
item = GetNext(enumerator);
if (item is Expression)
{
yield return(item);
continue;
}
if ((item is WordExpressionToken) == false)
{
throw new HandlebarsCompilerException("Encountered a non-word symbol at the beginning of the handlebars expression.");
}
var word = item as WordExpressionToken;
if (IsRegisteredHelperName(word.Value))
{
yield return(HandlebarsExpression.Helper(word.Value));
}
else
{
yield return(word);
}
}
else
{
yield return(item);
}
}
}
protected override Expression VisitHelperExpression(HelperExpression hex)
{
return(HandlebarsExpression.Helper(
hex.HelperName,
hex.Arguments.Select(arg => Visit(arg))));
}
