public Value Evaluate(ArrayYielder yielder)
{
var array = new Array();
foreach (Closure closure in yielder.Items)
{
Value value = closure.Evaluate(new Arguments());
if (value.Type == Value.ValueType.Nil)
{
return(array);
}
var skip = false;
foreach (Item item in items)
{
var iterItem = new Array.IterItem
{
Value = value,
Key = Array.GetKey(),
Index = array.Length
};
value = item.Process(iterItem, array.Length);
if (value == null || value.Type == Value.ValueType.Nil)
{
skip = true;
break;
}
}
if (!skip)
{
array.Add(value);
}
}
return(array);
}
public override Value Process(Array.IterItem item, int length)
{
using (var assistant = new ParameterAssistant(parameterBlock))
{
Block block = assistant.Block();
assistant.ArrayParameters();
assistant.SetParameterValues(item);
return(block.Evaluate().IsTrue ? item.Value : null);
}
}
public override Value Process(Array.IterItem item, int length)
{
signal = SignalType.None;
using (var assistant = new ParameterAssistant(parameterBlock))
{
var block = assistant.Block();
assistant.ArrayParameters();
assistant.SetParameterValues(item);
var value = block.Evaluate();
signal = Signal();
return(value);
}
}
public Value Evaluate(ArrayStream stream)
{
var array = new Array();
while (array.Length < stream.Limit)
{
Value value = stream.Next();
if (value.Type == Value.ValueType.Nil)
{
return(array);
}
var skip = false;
foreach (Item item in items)
{
var iterItem = new Array.IterItem
{
Value = value,
Key = Array.GetKey(),
Index = array.Length
};
value = item.Process(iterItem, array.Length);
if (value == null || value.Type == Value.ValueType.Nil)
{
/* if (item.IsTerminating)
* return array;*/
skip = true;
break;
}
}
if (!skip)
{
array.Add(value);
}
}
return(array);
}
public override Value Process(Array.IterItem item, int length)
{
return(length < limit ? item.Value : null);
}
public abstract Value Process(Array.IterItem item, int length);
