Funcky 3.2.0 | Funcky.Async 1.2.0

List Pattern for Option

We've added support for C# 11's List Patterns to Option<T>.
This means that you can use regular switch expressions / statements to match on options:

var greeting = person switch
{
    { FirstName: var firstName, LastName: [var lastName] } => $"Hello {firstName} {lastName}",
    { FirstName: var firstName } => $"Hi {firstName}",
};

record Person(string FirstName, Option<string> LastName);

Discard

The new Discard.__ field provides a short-hand for Unit.Value to be used with switch expressions.

using static Funcky.Discard;

return __ switch
{
    _ when user.IsFrenchAdmin() => "le sécret",
    _ when user.IsAdmin() => "secret",
    _ => "(redacted)",
};

Retry with Exception

We've added overloads to the Retry and RetryAsync functions that allow retrying a function
as long as an exception is thrown.

Example from IoRetrier:

// Retries an action until the file is no longer in use.
Task RetryWhileFileIsInUseAsync(IRetryPolicy policy, Action action)
    => RetryAsync(ActionToUnit(action), exception => exception is IOException && exception.HResult == FileInUseHResult, policy);