A library design for programming with effects and handlers in C# 7, inspired by the Eff programming language and the implementation of Algebraic Effects in OCaml, Eff Directly in OCaml. Eff can handle effect interpretation, detailed exception tracing and trace logging.
// Effect example
async Eff<int> Foo()
{
var y = await Effect.Random();
return y;
}
// Effect handler
public class CustomEffectHandler : EffectHandler
{
private readonly Random random;
public CustomEffectHandler(Random random)
{
this.random = random;
}
public override async Task Handle<TResult>(IEffect<TResult> effect)
{
switch (effect)
{
case RandomEffect randomEffect:
randomEffect.SetResult(random.Next());
break;
}
}
}
// Set effect handler and execute
var handler = new CustomEffectHandler(new Random());
var x = Foo().Run(handler).Result;via NuGet:
PM> Install-Package Eff