/// <summary>
/// Projects each element in a generator to a new form.
/// </summary>
/// <typeparam name="T">The type of the generator's value.</typeparam>
/// <typeparam name="TResult">The type of the resultant generator's value.</typeparam>
/// <param name="gen">The generator to apply the projection to.</param>
/// <param name="selector">A projection function to apply to each value.</param>
/// <returns>A new generator with the projection applied.</returns>
/// <summary>
/// Projects each element in a generator to a new form.
/// </summary>
/// <typeparam name="T">The type of the generator's value.</typeparam>
/// <typeparam name="TResult">The type of the resultant generator's value.</typeparam>
/// <param name="gen">The generator to apply the projection to.</param>
/// <param name="selector">A projection function to apply to each value.</param>
/// <returns>A new generator with the projection applied.</returns>
public static IGen <TResult> Select <T, TResult>(this IGen <T> gen, Func <T, TResult> selector)
{
GenInstanceTransformation <T, TResult> transformation = (instance) => {
var sourceExampleSpace = instance.ExampleSpace;
var projectedExampleSpace = instance.ExampleSpace.Map(selector);
return(GenIterationFactory.Instance(
instance.ReplayParameters,
instance.NextParameters,
projectedExampleSpace,
instance.ExampleSpaceHistory));
};
return(gen.TransformInstances(transformation));
}
public static IGen <T> Unfold <T>(
this IGen <T> gen,
Func <T, IExampleSpace <T> > unfolder)
{
GenInstanceTransformation <T, T> transformation = (instance) =>
{
return(GenIterationFactory.Instance(
instance.ReplayParameters,
instance.NextParameters,
unfolder(instance.ExampleSpace.Current.Value),
instance.ExampleSpaceHistory));
};
return(gen.TransformInstances(transformation));
}
public static IGen <T> NoShrink <T>(this IGen <T> gen) =>
gen.TransformInstances(instance => GenIterationFactory.Instance(
instance.ReplayParameters,
instance.NextParameters,
ExampleSpaceFactory.Singleton(instance.ExampleSpace.Current.Id, instance.ExampleSpace.Current.Value),
instance.ExampleSpaceHistory));
