Funcy is one of the functional libraries for C#/VB.
C#:
using System;
using Funcy;
using Funcy.Patterns;
using Funcy.Future;
namespace Hello
{
class Program
{
static void Main(string[] args)
{
// This is the classical style.
var maybe = Maybe<string>.Some("Hello").ComputeWith(hello =>
Maybe<string>.Some("World").Compute(world =>
hello + " " + world + "!"
)
);
Matcher.Match(maybe).With(
Case<string>.From<Some<string>>().Then(s => Console.WriteLine(s)),
Case<string>.Else().Then(() => Console.WriteLine("Fmm... Are there any troubles?"))
);
// This is the newer style.
var either = EitherTC<Exception>.Right("Thank").ComputeWith(thank =>
EitherTC<Exception>.Right("you").Compute(you =>
thank + " " + you + "!"
)
);
Matcher.Match(either).With(
Case<string>.From<Right<Exception, string>>().Then(s => Console.WriteLine(s)),
Case<string>.Else().Then(() => Console.WriteLine("Fmm... Are there any troubles?"))
);
}
}
}VB:
Imports Funcy
Imports Funcy.Patterns
Imports Funcy.Future
Module Module1
Sub Main()
' This is the classical style.
Dim maybeHello = Maybe(Of String).Some("Hello").ComputeWith(
Function(hello) Maybe(Of String).Some("World").Compute(
Function(world) hello + " " + world + "!"
)
)
Matcher.Match(maybeHello).With(
[Case](Of String).From(Of Some(Of String))().Then(Sub(s) Console.WriteLine(s)),
[Case](Of String).Else().Then(Sub() Console.WriteLine("Fmm... Are there any troubles?"))
)
' This is the newer style.
Dim eitherThankYou = EitherTC(Of Exception).Right("Thank").ComputeWith(
Function(thank) EitherTC(Of Exception).Rigt("you").Compute(
Function(you) thank + " " + you + "!"
)
)
Matcher.Match(eitherThankYou).With(
[Case](Of String).From(Of Right(Of Exception, String))().Then(Sub(s) Console.WriteLine(s)),
[Case](Of String).Else().Then(Sub() Console.WriteLine("Fmm... Are there any troubles?"))
)
End Sub
End ModulePull Requests are very welcome! You can also open issues freely. The one and only important point is Funcy's tests, which are written in F# and use Persimmon. Try it and familiarize yourself with it!
The MIT License - see LICENSE