private Filtering(Expression <Func <TSourceItem, bool> > predicateExpression,
int sourceCapacity, int capacity) : base(capacity)
{
_initialCapacity = capacity;
_filteredPositions = new Positions <Position>(new List <Position>(_initialCapacity));
_itemInfos = new List <ItemInfo>(sourceCapacity);
_sourcePositions = new Positions <ItemInfo>(_itemInfos);
_predicateExpressionOriginal = predicateExpression;
CallToConstantConverter callToConstantConverter =
new CallToConstantConverter(predicateExpression.Parameters);
_predicateExpression =
(Expression <Func <TSourceItem, bool> >)callToConstantConverter.Visit(predicateExpression);
_predicateContainsParametrizedObservableComputationsCalls =
callToConstantConverter.ContainsParametrizedObservableComputationCalls;
if (!_predicateContainsParametrizedObservableComputationsCalls)
{
_predicateExpressionInfo = ExpressionWatcher.GetExpressionInfo(_predicateExpression);
// ReSharper disable once PossibleNullReferenceException
_predicateFunc = _predicateExpression.Compile();
}
}
public Computing(
Expression <Func <TResult> > getValueExpression)
{
_changeValueAction = () => setValue(getResult());
_getValueExpressionOriginal = getValueExpression;
CallToConstantConverter callToConstantConverter = new CallToConstantConverter(_getValueExpressionOriginal.Parameters);
Expression <Func <TResult> > getValueExpression1 =
(Expression <Func <TResult> >)callToConstantConverter.Visit(_getValueExpressionOriginal);
// ReSharper disable once PossibleNullReferenceException
_getValueFunc = getValueExpression1.Compile();
_expressionInfo = ExpressionWatcher.GetExpressionInfo(getValueExpression1);
}
private Selecting(Expression <Func <TSourceItem, TResultItem> > selectorExpression, int capacity) : base(capacity)
{
_itemInfos = new List <ItemInfo>(capacity);
_sourcePositions = new Positions <ItemInfo>(_itemInfos);
_selectorExpressionOriginal = selectorExpression;
CallToConstantConverter callToConstantConverter =
new CallToConstantConverter(_selectorExpressionOriginal.Parameters);
_selectorExpression =
(Expression <Func <TSourceItem, TResultItem> >)callToConstantConverter.Visit(
_selectorExpressionOriginal);
_selectorContainsParametrizedObservableComputationsCalls =
callToConstantConverter.ContainsParametrizedObservableComputationCalls;
if (!_selectorContainsParametrizedObservableComputationsCalls)
{
_selectorExpressionInfo = ExpressionWatcher.GetExpressionInfo(_selectorExpression);
// ReSharper disable once PossibleNullReferenceException
_selectorFunc = _selectorExpression.Compile();
}
}