private static SubExpressionExpression BuildSubExpression(IEnumerator <object> enumerator)
{
object item = GetNext(enumerator);
var path = item as PathExpression;
if (path == null)
{
throw new HandlebarsCompilerException("Found a sub-expression that does not contain a path expression");
}
var helperArguments = AccumulateSubExpression(enumerator);
return(HandlebarsExpression.SubExpression(
HandlebarsExpression.Helper(
path.Path,
helperArguments)));
}
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 word)
{
if (IsRegisteredHelperName(word.Value))
{
yield return(HandlebarsExpression.Helper(word.Value));
}
else if (IsRegisteredBlockHelperName(word.Value))
{
yield return(HandlebarsExpression.Helper(word.Value));
}
else
{
yield return(item);
}
}
else
{
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 HelperExpression)
{
var helper = item as HelperExpression;
var helperArguments = AccumulateArguments(enumerator);
yield return(HandlebarsExpression.Helper(
helper.HelperName,
helperArguments));
yield return(enumerator.Current);
}
else if (item is PathExpression)
{
var helperArguments = AccumulateArguments(enumerator);
if (helperArguments.Count > 0)
{
var path = item as PathExpression;
yield return(HandlebarsExpression.Helper(
path.Path,
helperArguments));
yield return(enumerator.Current);
}
else
{
yield return(item);
yield return(enumerator.Current);
}
}
else
{
yield return(item);
}
}
}
protected override System.Linq.Expressions.Expression VisitHelperExpression(HelperExpression hex)
{
return(HandlebarsExpression.Helper(
hex.HelperName,
hex.Arguments.Select(Visit)));
}
