public static Either <TResult, TRight> ReplaceBy <TSource, TResult, TRight>(
this Either <TSource, TRight> @this,
TResult value)
{
Require.NotNull(@this, nameof(@this));
return(@this.Select(_ => value));
}
public static Either <IEnumerable <TSource>, TRight> Repeat <TSource, TRight>(
Either <TSource, TRight> source,
int count)
{
Require.NotNull(source, nameof(source));
Require.Range(count >= 0, nameof(count));
return(source.Select(val => Enumerable.Repeat(val, count)));
}
/// <seealso cref="Apply{TSource, TResult, TRight}(Either{Func{TSource, TResult}, TRight}, Either{TSource, TRight})" />
public static Either <TResult, TRight> Gather <TSource, TResult, TRight>(
this Either <TSource, TRight> @this,
Either <Func <TSource, TResult>, TRight> applicative)
{
Require.NotNull(@this, nameof(@this));
Require.NotNull(applicative, nameof(applicative));
return(applicative.Bind(func => @this.Select(func)));
}
// Select() with automatic resource management.
public static Either <TResult, TRight> Using <TSource, TResult, TRight>(
this Either <TSource, TRight> @this,
Func <TSource, TResult> selector)
where TSource : IDisposable
{
Require.NotNull(@this, nameof(@this));
Require.NotNull(selector, nameof(selector));
return(@this.Select(val => { using (val) { return selector(val); } }));
}
/// <seealso cref="Either.Lift{T1, T2, TResult, TRight}"/>
public static Either <TResult, TRight> ZipWith <T1, T2, TResult, TRight>(
this Either <T1, TRight> @this,
Either <T2, TRight> second,
Func <T1, T2, TResult> zipper)
{
Require.NotNull(@this, nameof(@this));
Require.NotNull(second, nameof(second));
Require.NotNull(zipper, nameof(zipper));
return(@this.Bind(
arg1 => second.Select(
arg2 => zipper(arg1, arg2))));
}
