internal void PushPipeArguments()
{
var arguments = _availablePipeArguments.Count > 0 ? _availablePipeArguments.Pop() : new ScriptPipeArguments(1);
_pipeArguments.Push(arguments);
_currentPipeArguments = arguments;
}
internal void PushPipeArguments()
{
ScriptPipeArguments pipeArguments = _availablePipeArguments.Count > 0
? _availablePipeArguments.Pop()
: new ScriptPipeArguments(4);
_pipeArguments.Push(pipeArguments);
_currentPipeArguments = pipeArguments;
}
internal void PopPipeArguments()
{
if (_pipeArguments.Count == 0)
{
throw new InvalidOperationException("Cannot PopPipeArguments more than PushPipeArguments");
}
var pipeFrom = _pipeArguments.Pop();
pipeFrom.Clear();
_currentPipeArguments = _pipeArguments.Count > 0 ? _pipeArguments.Peek() : null;
_availablePipeArguments.Push(pipeFrom);
}
internal void PopPipeArguments()
{
if (_pipeArguments.Count == 0)
{
throw new InvalidOperationException("Cannot PopPipeArguments more than PushPipeArguments");
}
var pipeArguments = _pipeArguments.Pop();
// Might be not null in case of an exception
pipeArguments.Clear();
_availablePipeArguments.Push(pipeArguments);
_currentPipeArguments = _pipeArguments.Count > 0 ? _pipeArguments.Peek() : null;
}
internal void PopPipeArguments()
{
if (_pipeArguments.Count == 1)
{
throw new InvalidOperationException(RS.PopPipeArgOverflow);
}
ScriptPipeArguments pipeArguments = _pipeArguments.Pop();
// Might be not null in case of an exception
pipeArguments.Clear();
_availablePipeArguments.Push(pipeArguments);
_currentPipeArguments = _pipeArguments.Peek();
}
public override object Evaluate(TemplateContext context)
{
int beforePipeArgumentCount = context.PipeArguments.Count + 1;
// We don't evaluate the From but we let the pipe evalute it later
var leftResult = context.Evaluate(From);
// Support for Parameters expansion
var unaryExpression = From as ScriptUnaryExpression;
if (unaryExpression != null && unaryExpression.Operator == ScriptUnaryOperator.FunctionParametersExpand)
{
// TODO: Pipe calls will not work correctly in case of (a | b) | ( c | d)
var valueEnumerator = leftResult as IEnumerable;
if (valueEnumerator != null)
{
ScriptPipeArguments pipeArguments = context.PipeArguments;
foreach (var subValue in valueEnumerator)
{
pipeArguments.Add(subValue);
}
}
else
{
context.PipeArguments.Add(leftResult);
}
}
else
{
context.PipeArguments.Add(leftResult);
}
var result = context.Evaluate(To);
int afterPipeArgumentCount = context.PipeArguments.Count;
if (afterPipeArgumentCount >= beforePipeArgumentCount)
{
throw new ScriptRuntimeException(To.Span, string.Format(RS.PipeDestNotFunc, To));
}
return(result);
}
