IResult Abstractions (#18)

* added `IResult` and `IResult<TValue>` abstractions

src/RailwayResult/IResult.cs

@@ -0,0 +1,13 @@
+namespace RailwayResult;
+
+public interface IResult
+{
+	public bool IsSuccess { get; }
+	public bool IsFailure { get; }
+	public Error Error { get; }
+}
+
+public interface IResult<TValue> : IResult
+{
+	public TValue Value { get; }
+}

src/RailwayResult/Result.Generic.cs

@@ -2,7 +2,7 @@
 
 namespace RailwayResult;
 
-public sealed class Result<TValue>
+public sealed class Result<TValue> : IResult<TValue>
 {
 	public bool IsSuccess { get; }
 	public bool IsFailure => !IsSuccess;

src/RailwayResult/Result.cs

@@ -2,7 +2,7 @@
 
 namespace RailwayResult;
 
-public sealed class Result
+public sealed class Result : IResult
 {
 	public bool IsSuccess { get; }
 	public bool IsFailure => !IsSuccess;