public static BackgroundGenerator <T> FromEnumerator(IEnumerator <T> Generator, int MaxCache = -1,
bool AutoStart = true)
{
return(BackgroundGenerator <T> .FromFunc(() =>
{
Generator.MoveNext();
return Generator.Current;
}, MaxCache, AutoStart));
}
public static BackgroundGenerator <T> FromFuncWithCarryover <R>(Func <R, Tuple <T, R> > CarryoverGenerateNext, int MaxCache = -1, bool AutoStart = true)
{
R ClosureCarryover = default(R);
return(BackgroundGenerator <T> .FromFunc(() =>
{
var tup = CarryoverGenerateNext(ClosureCarryover);
ClosureCarryover = tup.Item2;
return tup.Item1;
}));
}
public BackgroundGenerator <R> Chain <R>(Func <T, R> GenerateNext, int MaxCache = -1, bool AutoStart = true)
{
return(BackgroundGenerator <R> .FromFunc(() =>
{
if (this.MoveNext())
{
return GenerateNext(this.Current);
}
else
{
throw new OperationCanceledException("End of background generator reached");
}
}, MaxCache, AutoStart));
}
public static BackgroundGenerator <T> Chain <R>(Func <R, T> GenerateNext, IEnumerator <R> Source, int MaxCache = -1,
bool AutoStart = true)
{
return(BackgroundGenerator <T> .FromFunc(() =>
{
if (Source.MoveNext())
{
return GenerateNext(Source.Current);
}
else
{
throw new OperationCanceledException("End of background generator reached");
}
}, MaxCache, AutoStart));
}