public static IFlowState <TResult> Select <TSource, TResult>(this IFlowState <TSource> state,
Func <TSource, TResult> valueSelector,
Func <Exception, TResult> errorSelector)
{
return(state.SelectMany(t => new Value <TResult>(valueSelector(t)),
e => new Value <TResult>(errorSelector(e))));
}
public static IFlowState <TResult> Select <TSource, TResult>(this IFlowState <TSource> state,
Func <TSource, TResult> selector)
{
return(state.SelectMany(t => new Value <TResult>(selector(t))));
}
public static IFlowState <TResult> SelectMany <TSource, TResult>(this IFlowState <TSource> state,
Func <TSource, IFlowState <TResult> > selector)
{
return(state.SelectMany(selector, e => new Error <TResult>(e)));
}
public static IFlowState <TResult> SelectMany <TSource, TFlow, TResult>(this IFlowState <TSource> source,
Func <TSource, IFlowState <TFlow> > flowSelector, Func <TSource, TFlow, TResult> resultSelector)
{
return(source.SelectMany(s => flowSelector(s).Select(t => resultSelector(s, t))));
}
public static IFlowState <T> Flatten <T>(this IFlowState <IFlowState <T> > state)
{
return(state.SelectMany(t => t));
}