From 036b34d3c08fc85acb934195688e9fff110d1d52 Mon Sep 17 00:00:00 2001
From: JustFixMe <just@jstdev.ru>
Date: Fri, 8 Dec 2023 00:07:24 +0400
Subject: [PATCH] added basic Try extensions

---
 Railway/Result.cs |  26 ++++++++++-
 Railway/Try.cs    | 108 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 133 insertions(+), 1 deletion(-)
 create mode 100644 Railway/Try.cs

diff --git a/Railway/Result.cs b/Railway/Result.cs
index 7731858..bfcab13 100644
--- a/Railway/Result.cs
+++ b/Railway/Result.cs
@@ -38,9 +38,16 @@ public readonly partial struct Result : IEquatable<Result>
 
     [Pure, MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static Result Failure(Error error) => new(error ?? throw new ArgumentNullException(nameof(error)));
+
+    [Pure, MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static Result Failure(Exception exception) => new(Error.New(exception) ?? throw new ArgumentNullException(nameof(exception)));
+
     [Pure, MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static Result<T> Failure<T>(Error error) => new(error ?? throw new ArgumentNullException(nameof(error)));
 
+    [Pure, MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static Result<T> Failure<T>(Exception exception) => new(Error.New(exception) ?? throw new ArgumentNullException(nameof(exception)));
+
     [Pure, MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static implicit operator Result(Error error) => new(error ?? throw new ArgumentNullException(nameof(error)));
     [Pure, MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -54,6 +61,23 @@ public readonly partial struct Result : IEquatable<Result>
     [Pure] public bool IsSuccess => Error is null;
     [Pure] public bool IsFailure => Error is not null;
 
+    [Pure] public bool Success([MaybeNullWhen(false)]out SuccessUnit? u, [MaybeNullWhen(true), NotNullWhen(false)]out Error? error)
+    {
+        switch (State)
+        {
+            case ResultState.Success:
+                u = new SuccessUnit();
+                error = default;
+                return true;
+
+            case ResultState.Error:
+                u = default;
+                error = Error!;
+                return false;
+
+            default: throw new ResultNotInitializedException();
+        }
+    }
     [Pure] public bool TryGetError([MaybeNullWhen(false)]out Error error)
     {
         if (IsSuccess)
@@ -125,7 +149,7 @@ public readonly struct Result<T> : IEquatable<Result<T>>
     [Pure] public bool IsSuccess => State == ResultState.Success;
     [Pure] public bool IsFailure => State == ResultState.Error;
 
-    [Pure] public bool Unwrap([MaybeNullWhen(false)]out T value, [MaybeNullWhen(true)]out Error error)
+    [Pure] public bool Success([MaybeNullWhen(false)]out T value, [MaybeNullWhen(true), NotNullWhen(false)]out Error? error)
     {
         switch (State)
         {
diff --git a/Railway/Try.cs b/Railway/Try.cs
new file mode 100644
index 0000000..1d598c6
--- /dev/null
+++ b/Railway/Try.cs
@@ -0,0 +1,108 @@
+namespace Just.Railway;
+
+public static class Try
+{
+    public static Result Run(Action action)
+    {
+        try
+        {
+            action();
+            return Result.Success();
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure(ex);
+        }
+    }
+    public static async Task<Result> Run(Func<Task> action)
+    {
+        try
+        {
+            await action().ConfigureAwait(false);
+            return Result.Success();
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure(ex);
+        }
+    }
+    public static async ValueTask<Result> Run(Func<ValueTask> action)
+    {
+        try
+        {
+            await action().ConfigureAwait(false);
+            return Result.Success();
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure(ex);
+        }
+    }
+    public static Result<T> Run<T>(Func<T> func)
+    {
+        try
+        {
+            return Result.Success(func());
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure<T>(ex);
+        }
+    }
+    public static async Task<Result<T>> Run<T>(Func<Task<T>> func)
+    {
+        try
+        {
+            return Result.Success(await func().ConfigureAwait(false));
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure<T>(ex);
+        }
+    }
+    public static async ValueTask<Result<T>> Run<T>(Func<ValueTask<T>> func)
+    {
+        try
+        {
+            return Result.Success(await func().ConfigureAwait(false));
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure<T>(ex);
+        }
+    }
+
+    public static Result<T> Run<T>(Func<Result<T>> func)
+    {
+        try
+        {
+            return func();
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure<T>(ex);
+        }
+    }
+    public static async Task<Result<T>> Run<T>(Func<Task<Result<T>>> func)
+    {
+        try
+        {
+            return await func().ConfigureAwait(false);
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure<T>(ex);
+        }
+    }
+    public static async ValueTask<Result<T>> Run<T>(Func<ValueTask<Result<T>>> func)
+    {
+        try
+        {
+            return await func().ConfigureAwait(false);
+        }
+        catch (Exception ex)
+        {
+            return Result.Failure<T>(ex);
+        }
+    }
+}