private static void IterateEnumerable(
BindingContext context,
EncodedTextWriter writer,
ChainSegment[] blockParamsVariables,
IEnumerable target,
TemplateDelegate template,
TemplateDelegate ifEmpty)
{
using var innerContext = context.CreateFrame();
var iterator = new IteratorValues(innerContext);
var blockParams = new BlockParamsValues(innerContext, blockParamsVariables);
blockParams.CreateProperty(0, out var _0);
blockParams.CreateProperty(1, out var _1);
var enumerator = new ExtendedEnumerator <object>(target.GetEnumerator());
var enumerated = false;
object boxedIndex;
object iteratorValue;
while (enumerator.MoveNext())
{
enumerated = true;
var enumerableValue = enumerator.Current;
if (enumerableValue.Index == 1)
{
iterator.First = BoxedValues.False;
}
if (enumerableValue.IsLast)
{
iterator.Last = BoxedValues.True;
}
boxedIndex = enumerableValue.Index;
iteratorValue = enumerableValue.Value;
iterator.Value = iteratorValue;
iterator.Index = boxedIndex;
blockParams[_0] = iteratorValue;
blockParams[_1] = boxedIndex;
innerContext.Value = iteratorValue;
template(writer, innerContext);
}
if (!enumerated)
{
innerContext.Value = context.Value;
ifEmpty(writer, innerContext);
}
}
private static void IterateList(
BindingContext context,
EncodedTextWriter writer,
ChainSegment[] blockParamsVariables,
IList target,
TemplateDelegate template,
TemplateDelegate ifEmpty)
{
using var innerContext = context.CreateFrame();
var iterator = new IteratorValues(innerContext);
var blockParams = new BlockParamsValues(innerContext, blockParamsVariables);
blockParams.CreateProperty(0, out var _0);
blockParams.CreateProperty(1, out var _1);
var count = target.Count;
object boxedIndex;
object iteratorValue;
var iterationIndex = 0;
var lastIndex = count - 1;
for (; iterationIndex < count; iterationIndex++)
{
iteratorValue = target[iterationIndex];
iterator.Value = iteratorValue;
if (iterationIndex == 1)
{
iterator.First = BoxedValues.False;
}
if (iterationIndex == lastIndex)
{
iterator.Last = BoxedValues.True;
}
boxedIndex = iterationIndex;
iterator.Index = boxedIndex;
blockParams[_0] = iteratorValue;
blockParams[_1] = boxedIndex;
innerContext.Value = iteratorValue;
template(writer, innerContext);
}
if (iterationIndex == 0)
{
innerContext.Value = context.Value;
ifEmpty(writer, innerContext);
}
}
