Success and Failure async methods

CSharpFunctionalExtensions/Result/Methods/FailureAsync.cs

@@ -0,0 +1,31 @@
+using System.Threading.Tasks;
+
+namespace CSharpFunctionalExtensions
+{
+    public partial struct Result
+    {
+        /// <summary>
+        ///     Creates a failure async result with the given error message.
+        /// </summary>
+        public static Task<Result> FailureAsync(string error)
+        {
+            return new Task<Result>(() => Failure(error));
+        }
+
+        /// <summary>
+        ///     Creates a failure async result with the given error message.
+        /// </summary>
+        public static Task<Result<T>> FailureAsync<T>(string error)
+        {
+            return new Task<Result<T>>(() => Failure<T>(error));
+        }
+
+        /// <summary>
+        ///     Creates a failure async result with the given error.
+        /// </summary>
+        public static Task<Result<T, E>> FailureAsync<T, E>(E error)
+        {
+            return new Task<Result<T, E>>(() => Failure<T, E>(error));
+        }
+    }
+}

CSharpFunctionalExtensions/Result/Methods/SuccessAsync.cs

@@ -0,0 +1,31 @@
+using System.Threading.Tasks;
+
+namespace CSharpFunctionalExtensions
+{
+    public partial struct Result
+    {
+        /// <summary>
+        ///     Creates a success async result.
+        /// </summary>
+        public static Task<Result> SuccessAsync()
+        {
+            return new Task<Result>(() => Success());
+        }
+
+        /// <summary>
+        ///     Creates a success async result containing the given value.
+        /// </summary>
+        public static Task<Result<T>> SuccessAsync<T>(T value)
+        {
+            return new Task<Result<T>>(() => Success<T>(value));
+        }
+
+        /// <summary>
+        ///     Creates a success async result containing the given value.
+        /// </summary>
+        public static Task<Result<T, E>> SuccessAsync<T, E>(T value)
+        {
+            return new Task<Result<T,E>>(() => Success<T, E>(value));
+        }
+    }
+}