UlrikenResult 22.2.23

UlrikenResult

What is it?

UlrikenResult is methods and extensions helping you writing c# in a more functional manner. It is my own helpers and extensions which I have collected into one assembly.

How can you use it?

The Result-class

The Result-class is like the Either-monad in Haskell. Combined with the static Do-function I can write code that handles exceptions. I use it like this:

public Result MyMethod(int aParameter) => Do.Try(()=>
{
    // Do something wich throws an exception
});


public void CallMyMethod()
{
    MyMethod(1)
        .Then(()=> /* MyMethod didnt throw an exception */)
        .Fail(r => /* MyMethod throw an exception, can be accessed in r.Exception */)
        .Always(() => /* This code is always executed, even if MyMethod fails */);
}

The Do-class

The Do-class is used as a wrapper around your methods. It's static, and you can add a logger to it so that all exceptions are logged.

It has the following methods:

RaiseIf

void RaiseIf(Func<bool> func, string errorMessage)

This raises an application-exception with the given message if func is false.

void RaiseIf(Func<bool> func, Exception exception)

This raises the given exception if func is false.

Try

Result<T> Try<T>(Func<T> func, string messageOnFail = "", string logMessage = "")

Result Try(Action func, string messageOnFail = "", string logMessage = "")