public ConditionalBlockAccumulatorContext(Expression startingNode)
{
var item = (HelperExpression)UnwrapStatement(startingNode);
BlockName = item.HelperName.Replace("#", "");
if (new [] { "if", "unless" }.Contains(BlockName) == false)
{
throw new HandlebarsCompilerException(string.Format(
"Tried to convert {0} expression to conditional block", BlockName));
}
var testType = BlockName == "if";
var argument = HandlebarsExpression.BoolishExpression(item.Arguments.Single());
_currentCondition = testType ? (Expression)argument : Expression.Not(argument);
}
private static Expression GetElseIfTestExpression(Expression item)
{
item = UnwrapStatement(item);
return(HandlebarsExpression.BoolishExpression(((HelperExpression)item).Arguments.Skip(1).Single()));
}
protected override Expression VisitBoolishExpression(BoolishExpression bex)
{
return(HandlebarsExpression.BoolishExpression(Visit(bex.ConditionExpression)));
}