|
public static SubExpression ( |
||
| expression | ||
| return | SubExpressionExpression | |
Expression Visit(Expression expression)
{
if (expression is HelperExpression helperExpression)
{
var originalArguments = helperExpression.Arguments.ToArray();
var arguments = ConvertTokens(originalArguments)
.Cast <Expression>()
.ToArray();
if (!arguments.SequenceEqual(originalArguments))
{
return(HandlebarsExpression.Helper(
helperExpression.HelperName,
arguments,
helperExpression.IsRaw));
}
}
if (expression is SubExpressionExpression subExpression)
{
Expression childExpression = Visit(subExpression.Expression);
if (childExpression != subExpression.Expression)
{
return(HandlebarsExpression.SubExpression(childExpression));
}
}
return(expression);
}
protected virtual Expression VisitSubExpression(SubExpressionExpression subex)
{
Expression expression = Visit(subex.Expression);
if (expression != subex.Expression)
{
return(HandlebarsExpression.SubExpression(expression));
}
return(subex);
}
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)));
}
protected override Expression VisitSubExpression(SubExpressionExpression subex)
{
return(HandlebarsExpression.SubExpression(
Visit(subex.Expression)));
}
