public static TAcc Transduce <TAcc, TIn, TOut>(this IEnumerable <TIn> source, ITransducer <TIn, TOut> transducer, Func <TAcc, TOut, TAcc> reducer, TAcc seed)
{
var sourceEnum = source.GetEnumerator();
var status = new ReductionStatus();
var res = seed;
var red = transducer.Transform(status, reducer);
while (!status.Complete && sourceEnum.MoveNext())
{
res = red(res, sourceEnum.Current);
}
return(res);
}
public Func <TAcc, TSource, TAcc> Transform <TAcc>(ReductionStatus status, Func <TAcc, TSource, TAcc> reducer)
{
var prefixComplete = _prefixCompleteFactory();
return((acc, source) => {
if (prefixComplete(source))
{
status.Complete = true;
return acc;
}
return reducer(acc, source);
});
}
public static IEnumerable <TOut> Transduce <TIn, TOut>(this IEnumerable <TIn> source, ITransducer <TIn, TOut> transducer)
{
var sourceEnum = source.GetEnumerator();
var status = new ReductionStatus();
var red = transducer.Transform <Optional <TOut> >(status, Utils.Enumerator);
while (sourceEnum.MoveNext())
{
var res = red(new Optional <TOut>(), sourceEnum.Current);
if (status.Complete)
{
break;
}
if (res.HasValue)
{
yield return(res.Value);
}
}
}
public Func <TAcc, TSource, TAcc> Transform <TAcc>(ReductionStatus status, Func <TAcc, TSource, TAcc> reducer)
{
var prefixComplete = _prefixCompleteFactory();
bool skipping = true;
return((acc, source) => {
if (!skipping)
{
return reducer(acc, source);
}
else if (prefixComplete(source))
{
skipping = false;
return reducer(acc, source);
}
else
{
return acc;
}
});
}
public Func <TAcc, TIn, TAcc> Transform <TAcc>(ReductionStatus status, Func <TAcc, TOut, TAcc> reducer)
{
return(_transducer1.Transform(status, _transducer2.Transform(status, reducer)));
}
public Func <TAcc, TIn, TAcc> Transform <TAcc>(ReductionStatus status, Func <TAcc, TOut, TAcc> reducer)
{
return((acc, source) => reducer(acc, _selector(source)));
}
public Func <TAcc, TSource, TAcc> Transform <TAcc>(ReductionStatus status, Func <TAcc, TSource, TAcc> reducer)
{
return((acc, source) => _predicate(source) ? reducer(acc, source) : acc);
}
