Railway Oriented Programming In CSharp

 Railway Oriented Programming My Implementation In CSharp

Error handling using ROP

Implementation of Either Monad using Interface

	public interface IResult<T>
	{
	TResult Match<TResult>(
	Func<T, TResult> onSuccess,
	Func<ErrorType, TResult> onError
	);
	IResult<TResult> Map<TResult>(Func<T, TResult> f);
	IResult<TResult> Bind<TResult>(Func<T, IResult<TResult>> f);
	}
	public class Success<T> : IResult<T>
	{
	private readonly T _results;
	public Success(T results)
	{
	_results = results;
	}
	public TResult Match<TResult>(Func<T, TResult> onSuccess, Func<ErrorType, TResult> _) => onSuccess(_results);
	public IResult<TResult> Map<TResult>(Func<T, TResult> f) => new Success<TResult>(f(_results));
	public IResult<TResult> Bind<TResult>(Func<T, IResult<TResult>> f) => f(_results);
	}
	public class Error<T> : IResult<T>
	{
	private readonly ErrorType _error;
	public Error(ErrorType error)
	{
	_error = error;
	}
	public TResult Match<TResult>(Func<T, TResult> _, Func<ErrorType, TResult> onError) => onError(_error);
	public IResult<TResult> Map<TResult>(Func<T, TResult> _) => new Error<TResult>(_error);
	public IResult<TResult> Bind<TResult>(Func<T, IResult<TResult>> _) => new Error<TResult>(_error);
	}

view raw Result.cs hosted with ❤ by GitHub

Keeping all our errors in a single enum

	public enum ErrorType
	{
	NameCanNotBeBlank,
	EmailCanNotBeBlank,
	EmailNotValid,
	UserNotFound,
	DatabaseUpdateError,
	EmailNotSend
	}

view raw ErrorType.cs hosted with ❤ by GitHub

Github Repo

Example taken from Railway Oriented Programming