feat: add none generic result type

This adds a none generic result type and refactors the result to be a
class. The Result has the same inheritance like `Task` and `Task<T>`

src/request.result.tests/ExtensionsTaskTests.cs

@@ -0,0 +1,107 @@
+// Copyright (c) The Geekeey Authors
+// SPDX-License-Identifier: EUPL-1.2
+
+using System.Globalization;
+
+namespace Geekeey.Request.Result.Tests;
+
+internal sealed class ExtensionsTaskTests
+{
+	[Test]
+	public async Task I_can_map_on_task_and_it_returns_success_for_success()
+	{
+		var start = Task.FromResult(Prelude.Success(2));
+		var result = await start.Map(value => value.ToString(CultureInfo.InvariantCulture));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo("2");
+	}
+
+	[Test]
+	public async Task I_can_try_map_on_task_and_it_returns_failure_for_success_with_throwing()
+	{
+		var start = Task.FromResult(Prelude.Success(2));
+		var result = await start.TryMap<int, string>(value => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_map_async_on_task_and_it_returns_success_for_success()
+	{
+		var start = Task.FromResult(Prelude.Success(2));
+		var result = await start.MapAsync(value => Task.FromResult(value.ToString(CultureInfo.InvariantCulture)));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo("2");
+	}
+
+	[Test]
+	public async Task I_can_then_on_task_and_it_returns_success_for_success()
+	{
+		var start = Task.FromResult(Prelude.Success(2));
+		var result = await start.Then(value => Prelude.Success(value.ToString(CultureInfo.InvariantCulture)));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo("2");
+	}
+
+	[Test]
+	public async Task I_can_then_non_generic_on_task_and_it_returns_success_for_success()
+	{
+		var start = Task.FromResult(Prelude.Success(2));
+		var result = await start.Then(value => Prelude.Success());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_map_on_value_task_and_it_returns_success_for_success()
+	{
+		var start = ValueTask.FromResult(Prelude.Success(2));
+		var result = await start.Map(value => value.ToString(CultureInfo.InvariantCulture));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo("2");
+	}
+
+	[Test]
+	public async Task I_can_map_on_task_result_and_it_returns_success_for_success()
+	{
+		var start = Task.FromResult(Prelude.Success());
+		var result = await start.Map(() => "2");
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo("2");
+	}
+
+	[Test]
+	public async Task I_can_then_on_task_result_and_it_returns_success_for_success()
+	{
+		var start = Task.FromResult(Prelude.Success());
+		var result = await start.Then(Prelude.Success);
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_then_generic_on_task_result_and_it_returns_success_for_success()
+	{
+		var start = Task.FromResult(Prelude.Success());
+		var result = await start.Then(() => Prelude.Success("2"));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo("2");
+	}
+}

src/request.result.tests/IResultFactoryTests.cs

@@ -0,0 +1,34 @@
+// Copyright (c) The Geekeey Authors
+// SPDX-License-Identifier: EUPL-1.2
+
+namespace Geekeey.Request.Result.Tests;
+
+public class IResultFactoryTests
+{
+	[Test]
+	public async Task I_can_assign_result_to_result_factory()
+	{
+		await Assert.That(typeof(IResultFactory<Result>).IsAssignableFrom(typeof(Result))).IsTrue();
+		await Assert.That(typeof(IResultFactory<Result<int>>).IsAssignableFrom(typeof(Result<int>))).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_create_failure_result_from_error_with_result_factory()
+	{
+		{
+			var error = new StringError("error");
+			var result = CreateFailure<Result>(error);
+			await Assert.That(result.IsFailure).IsTrue();
+		}
+		{
+			var error = new StringError("error");
+			var result = CreateFailure<Result<int>>(error);
+			await Assert.That(result.IsFailure).IsTrue();
+		}
+	}
+
+	private static TResult CreateFailure<TResult>(Error error) where TResult : IResultFactory<TResult>
+	{
+		return TResult.Failure(error);
+	}
+}

src/request.result.tests/PreludeTests.cs

@@ -97,4 +97,84 @@ internal sealed class PreludeTests
 		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
 		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
 	}
+
+	[Test]
+	public async Task I_can_create_success_result_using_prelude()
+	{
+		var result = Prelude.Success();
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.IsFailure).IsFalse();
+	}
+
+	[Test]
+	public async Task I_can_create_failure_result_using_prelude()
+	{
+		var result = Prelude.Failure("error");
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.IsFailure).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_action_with_success_and_get_a_success_result()
+	{
+		var result = Prelude.Try(() => { });
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_action_with_throwing_exception_and_get_a_failure_result()
+	{
+		var result = Prelude.Try(() => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_async_action_with_success_and_get_a_success_result()
+	{
+		var result = await Prelude.TryAsync(() => Task.CompletedTask);
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_async_action_with_throwing_exception_and_get_a_failure_result()
+	{
+		var result = await Prelude.TryAsync(Task () => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_async_value_action_with_success_and_get_a_success_result()
+	{
+		var result = await Prelude.TryAsync(() => ValueTask.CompletedTask);
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_async_value_action_with_throwing_exception_and_get_a_failure_result()
+	{
+		var result = await Prelude.TryAsync(ValueTask () => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
 }

src/request.result.tests/ResultConversionTests.cs

@@ -61,4 +61,16 @@ internal sealed class ResultConversionTests
 
 		await Assert.That(() => (int)result).Throws<UnwrapException>();
 	}
+
+	[Test]
+	public async Task I_can_implicitly_convert_from_error_to_non_generic_result()
+	{
+		var error = new CustomTestError();
+		Result result = error;
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.IsFailure).IsTrue();
+		await Assert.That(result.Error).IsTypeOf<CustomTestError>();
+	}
 }

src/request.result.tests/ResultEqualityTests.cs

@@ -172,4 +172,31 @@ internal sealed class ResultEqualityTests
 
 		await Assert.That(result.GetHashCode()).IsZero();
 	}
+
+	[Test]
+	public async Task I_can_equal_non_generic_result_and_get_true_for_success_and_success()
+	{
+		var a = Prelude.Success();
+		var b = Prelude.Success();
+
+		await Assert.That(a.Equals(b)).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_equal_non_generic_result_and_get_true_for_failure_and_failure()
+	{
+		var a = Prelude.Failure("error 1");
+		var b = Prelude.Failure("error 2");
+
+		await Assert.That(a.Equals(b)).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_equal_non_generic_result_and_get_false_for_success_and_failure()
+	{
+		var a = Prelude.Success();
+		var b = Prelude.Failure("error");
+
+		await Assert.That(a.Equals(b)).IsFalse();
+	}
 }

src/request.result.tests/ResultMatchingTests.cs

@@ -229,4 +229,137 @@ internal sealed class ResultMatchingTests
 			return ValueTask.CompletedTask;
 		}
 	}
+
+	[Test]
+	public async Task I_can_match_non_generic_result_and_it_calls_success_func_for_success()
+	{
+		var result = Prelude.Success();
+		var match = result.Match(
+			() => "success",
+			_ => throw new InvalidOperationException());
+
+		await Assert.That(match).IsEqualTo("success");
+	}
+
+	[Test]
+	public async Task I_can_match_non_generic_result_and_it_calls_failure_func_for_failure()
+	{
+		var result = Prelude.Failure("error");
+		var match = result.Match(
+			() => throw new InvalidOperationException(),
+			e => e);
+
+		await Assert.That(match.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_switch_non_generic_result_and_it_calls_success_action_for_success()
+	{
+		var called = false;
+
+		var result = Prelude.Success();
+		result.Switch(OnSuccess, OnFailure);
+
+		await Assert.That(called).IsTrue();
+
+		void OnSuccess()
+		{
+			called = true;
+		}
+
+		void OnFailure(Error e)
+		{
+			throw new InvalidOperationException();
+		}
+	}
+
+	[Test]
+	public async Task I_can_switch_non_generic_result_and_it_calls_failure_action_for_failure()
+	{
+		var called = false;
+		var value = default(Error);
+
+		var result = Prelude.Failure("error");
+		result.Switch(OnSuccess, OnFailure);
+
+		await Assert.That(called).IsTrue();
+		await Assert.That(value?.Message).IsEqualTo("error");
+
+		void OnSuccess()
+		{
+			throw new InvalidOperationException();
+		}
+
+		void OnFailure(Error e)
+		{
+			value = e;
+			called = true;
+		}
+	}
+
+	[Test]
+	public async Task I_can_match_async_non_generic_result_and_it_calls_success_func_for_success()
+	{
+		var result = Prelude.Success();
+		var match = await result.MatchAsync(
+			() => Task.FromResult("success"),
+			_ => throw new InvalidOperationException());
+
+		await Assert.That(match).IsEqualTo("success");
+	}
+
+	[Test]
+	public async Task I_can_switch_async_non_generic_result_and_it_calls_success_action_for_success()
+	{
+		var called = false;
+
+		var result = Prelude.Success();
+		await result.SwitchAsync(OnSuccess, OnFailure);
+
+		await Assert.That(called).IsTrue();
+
+		Task OnSuccess()
+		{
+			called = true;
+			return Task.CompletedTask;
+		}
+
+		Task OnFailure(Error e)
+		{
+			throw new InvalidOperationException();
+		}
+	}
+
+	[Test]
+	public async Task I_can_match_async_non_generic_result_and_it_calls_success_func_for_success_ValueTask()
+	{
+		var result = Prelude.Success();
+		var match = await result.MatchAsync(
+			() => ValueTask.FromResult("success"),
+			_ => throw new InvalidOperationException());
+
+		await Assert.That(match).IsEqualTo("success");
+	}
+
+	[Test]
+	public async Task I_can_switch_async_non_generic_result_and_it_calls_success_action_for_success_ValueTask()
+	{
+		var called = false;
+
+		var result = Prelude.Success();
+		await result.SwitchAsync(OnSuccess, OnFailure);
+
+		await Assert.That(called).IsTrue();
+
+		ValueTask OnSuccess()
+		{
+			called = true;
+			return ValueTask.CompletedTask;
+		}
+
+		ValueTask OnFailure(Error e)
+		{
+			throw new InvalidOperationException();
+		}
+	}
 }

src/request.result.tests/ResultOperatorTests.cs

@@ -0,0 +1,104 @@
+// Copyright (c) The Geekeey Authors
+// SPDX-License-Identifier: EUPL-1.2
+
+using Geekeey.Request.Result;
+
+namespace Geekeey.Request.Result.Tests;
+
+internal sealed class ResultOperatorTests
+{
+	[Test]
+	public async Task I_can_compare_non_generic_results_with_operator_and_get_true_for_success_and_success()
+	{
+		var a = Prelude.Success();
+		var b = Prelude.Success();
+
+		await Assert.That(a == b).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_compare_non_generic_results_with_operator_and_get_true_for_failure_and_failure()
+	{
+		var a = Prelude.Failure("error 1");
+		var b = Prelude.Failure("error 2");
+
+		await Assert.That(a == b).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_compare_non_generic_results_with_operator_and_get_false_for_success_and_failure()
+	{
+		var a = Prelude.Success();
+		var b = Prelude.Failure("error");
+
+		await Assert.That(a == b).IsFalse();
+	}
+
+	[Test]
+	public async Task I_can_compare_non_generic_results_with_operator_and_handle_nulls()
+	{
+		Result? a = null;
+		Result? b = null;
+		var c = Prelude.Success();
+
+		await Assert.That(a == b).IsTrue();
+		await Assert.That(a == c).IsFalse();
+		await Assert.That(c == a).IsFalse();
+		await Assert.That(a != b).IsFalse();
+	}
+
+	[Test]
+	public async Task I_can_compare_generic_results_with_operator_and_get_true_for_success_with_equal_value()
+	{
+		var a = Prelude.Success(2);
+		var b = Prelude.Success(2);
+
+		await Assert.That(a == b).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_compare_generic_results_with_operator_and_get_false_for_success_with_unequal_value()
+	{
+		var a = Prelude.Success(2);
+		var b = Prelude.Success(3);
+
+		await Assert.That(a == b).IsFalse();
+	}
+
+	[Test]
+	public async Task I_can_compare_generic_results_with_operator_and_get_true_for_failure_and_failure()
+	{
+		var a = Prelude.Failure<int>("error 1");
+		var b = Prelude.Failure<int>("error 2");
+
+		await Assert.That(a == b).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_compare_generic_result_with_value_using_operator_true_when_success_and_equal()
+	{
+		var a = Prelude.Success(2);
+		var b = 2;
+
+		await Assert.That(a == b).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_compare_generic_result_with_value_using_operator_false_when_failure()
+	{
+		var a = Prelude.Failure<int>("error");
+		var b = 2;
+
+		await Assert.That(a == b).IsFalse();
+	}
+
+	[Test]
+	public async Task I_can_get_hashcode_non_generic_success_and_failure()
+	{
+		var success = Prelude.Success();
+		var failure = Prelude.Failure("error");
+
+		await Assert.That(success.GetHashCode()).IsEqualTo(true.GetHashCode());
+		await Assert.That(failure.GetHashCode()).IsEqualTo(false.GetHashCode());
+	}
+}

src/request.result.tests/ResultTests.cs

@@ -29,18 +29,6 @@ internal sealed class ResultTests
 		await Assert.That(result.Error).IsTypeOf<CustomTestError>();
 	}
 
-	[Test]
-	public async Task I_can_distinguish_default_result_from_created()
-	{
-		var result = default(Result<int>);
-
-		using var scope = Assert.Multiple();
-		await Assert.That(result.IsSuccess).IsFalse();
-		await Assert.That(result.IsFailure).IsTrue();
-		await Assert.That(result.Value).IsEqualTo(default(int));
-		await Assert.That(result.Error).IsEqualTo(Error.DefaultValueError);
-	}
-
 	[Test]
 	public async Task I_can_to_string_success_result_value()
 	{
@@ -56,4 +44,53 @@ internal sealed class ResultTests
 
 		await Assert.That(result.ToString()).IsEqualTo("Failure { error }");
 	}
+
+	[Test]
+	public async Task I_can_create_new_success_result()
+	{
+		var result = new Result();
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.IsFailure).IsFalse();
+		await Assert.That(result.Error).IsNull();
+	}
+
+	[Test]
+	public async Task I_can_create_new_failure_result()
+	{
+		var result = new Result(new CustomTestError());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.IsFailure).IsTrue();
+		await Assert.That(result.Error).IsTypeOf<CustomTestError>();
+	}
+
+	[Test]
+	public async Task I_can_to_string_success_result()
+	{
+		var result = new Result();
+
+		await Assert.That(result.ToString()).IsEqualTo("Success");
+	}
+
+	[Test]
+	public async Task I_can_to_string_failure_result()
+	{
+		var result = new Result(new StringError("error"));
+
+		await Assert.That(result.ToString()).IsEqualTo("Failure { error }");
+	}
+
+	[Test]
+	public async Task I_can_use_generic_result_as_non_generic_result()
+	{
+		Result result = new Result<int>(1);
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.IsFailure).IsFalse();
+		await Assert.That(result.Error).IsNull();
+	}
 }

src/request.result.tests/ResultTransformTests.cs

@@ -641,4 +641,633 @@ internal sealed class ResultTransformTests
 		await Assert.That(result.Error).IsTypeOf<StringError>();
 		await Assert.That(result.Error?.Message).IsEqualTo("error");
 	}
+
+	[Test]
+	public async Task I_can_map_non_generic_result_and_it_returns_success_for_success()
+	{
+		var start = Prelude.Success();
+		var result = start.Map(() => 42);
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_map_non_generic_result_and_it_returns_failure_for_failure()
+	{
+		var start = Prelude.Failure("error");
+		var result = start.Map(() => 42);
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_and_it_returns_failure_for_exception()
+	{
+		var start = Prelude.Success();
+		var result = start.TryMap<int>(() => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_with_then_and_it_returns_success_for_success()
+	{
+		var start = Prelude.Success();
+		var result = start.Then(Prelude.Success);
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_with_then_to_generic_and_it_returns_success_for_success()
+	{
+		var start = Prelude.Success();
+		var result = start.Then(() => Prelude.Success(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_transform_generic_result_with_then_to_non_generic_and_it_returns_success_for_success()
+	{
+		var start = Prelude.Success(42);
+		var result = start.Then(_ => Prelude.Success());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_map_non_generic_result_async_and_it_returns_success_for_success_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.MapAsync(() => Task.FromResult(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_async_and_it_returns_failure_for_exception_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.TryMapAsync((Func<Task<int>>)(() => throw new CustomTestException()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_async_with_then_and_it_returns_success_for_success_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenAsync(() => Task.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_transform_generic_result_async_with_then_to_non_generic_and_it_returns_success_for_success_Task()
+	{
+		var start = Prelude.Success(42);
+		var result = await start.ThenAsync(_ => Task.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_map_non_generic_result_async_and_it_returns_success_for_success_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.MapAsync(() => ValueTask.FromResult(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_async_and_it_returns_failure_for_exception_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.TryMapAsync((Func<ValueTask<int>>)(() => throw new CustomTestException()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_transform_generic_result_async_with_then_to_non_generic_and_it_returns_success_for_success_ValueTask()
+	{
+		var start = Prelude.Success(42);
+		var result = await start.ThenAsync(_ => ValueTask.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_to_non_generic_and_it_returns_success_for_success()
+	{
+		var start = Prelude.Success(2);
+		var result = start.ThenTry(value => Prelude.Success());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_to_non_generic_and_it_returns_failure_for_success_and_mapping_returning_failure()
+	{
+		var start = Prelude.Success(2);
+		var result = start.ThenTry(_ => Prelude.Failure("error"));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_to_non_generic_and_it_returns_failure_for_success_and_mapping_throwing()
+	{
+		var start = Prelude.Success(2);
+		var result = start.ThenTry(_ => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_async_to_non_generic_and_it_returns_success_for_success_Task()
+	{
+		var start = Prelude.Success(2);
+		var result = await start.ThenTryAsync(value => Task.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_async_to_non_generic_and_it_returns_failure_for_success_and_mapping_throwing_Task()
+	{
+		var start = Prelude.Success(2);
+		var result = await start.ThenTryAsync(Task<Result> (_) => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_async_to_non_generic_and_it_returns_success_for_success_ValueTask()
+	{
+		var start = Prelude.Success(2);
+		var result = await start.ThenTryAsync(value => ValueTask.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_async_to_non_generic_and_it_returns_failure_for_success_and_mapping_throwing_ValueTask()
+	{
+		var start = Prelude.Success(2);
+		var result = await start.ThenTryAsync(ValueTask<Result> (_) => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_with_then_and_it_returns_success_for_success()
+	{
+		var start = Prelude.Success();
+		var result = start.ThenTry(Prelude.Success);
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_with_then_and_it_returns_failure_for_exception()
+	{
+		var start = Prelude.Success();
+		var result = start.ThenTry(() => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_with_then_to_generic_and_it_returns_success_for_success()
+	{
+		var start = Prelude.Success();
+		var result = start.ThenTry(() => Prelude.Success(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_with_then_to_generic_and_it_returns_failure_for_exception()
+	{
+		var start = Prelude.Success();
+		var result = start.ThenTry<int>(() => throw new CustomTestException());
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_map_non_generic_result_async_and_it_returns_failure_for_failure_Task()
+	{
+		var start = Prelude.Failure("error");
+		var result = await start.MapAsync(() => Task.FromResult(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_async_and_it_returns_success_for_success_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.TryMapAsync(() => Task.FromResult(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_async_and_it_returns_failure_for_failure_Task()
+	{
+		var start = Prelude.Failure("error");
+		var result = await start.TryMapAsync(() => Task.FromResult(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_async_and_it_returns_failure_for_await_exception_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.TryMapAsync((Func<Task<int>>)(async () =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		}));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_async_with_then_and_it_returns_failure_for_failure_Task()
+	{
+		var start = Prelude.Failure("error");
+		var result = await start.ThenAsync(() => Task.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_and_it_returns_success_for_success_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync(() => Task.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_and_it_returns_failure_for_exception_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync((Func<Task<Result>>)(() => throw new CustomTestException()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_and_it_returns_failure_for_await_exception_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync((Func<Task<Result>>)(async () =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		}));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_async_with_then_to_generic_and_it_returns_success_for_success_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenAsync(() => Task.FromResult(Prelude.Success(42)));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_async_with_then_to_generic_and_it_returns_failure_for_failure_Task()
+	{
+		var start = Prelude.Failure("error");
+		var result = await start.ThenAsync(() => Task.FromResult(Prelude.Success(42)));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_to_generic_and_it_returns_success_for_success_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync(() => Task.FromResult(Prelude.Success(42)));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_to_generic_and_it_returns_failure_for_exception_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync((Func<Task<Result<int>>>)(() => throw new CustomTestException()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_to_generic_and_it_returns_failure_for_await_exception_Task()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync((Func<Task<Result<int>>>)(async () =>
+		{
+			await Task.CompletedTask;
+			throw new CustomTestException();
+		}));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_transform_generic_result_async_with_then_to_non_generic_and_it_returns_failure_for_failure_ValueTask()
+	{
+		var start = Prelude.Failure<int>("error");
+		var result = await start.ThenAsync(_ => ValueTask.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_async_to_non_generic_and_it_returns_failure_for_success_and_mapping_returning_failure_ValueTask()
+	{
+		var start = Prelude.Success(2);
+		var result = await start.ThenTryAsync(_ => ValueTask.FromResult(Prelude.Failure("error")));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_transform_result_async_to_non_generic_and_it_returns_failure_for_success_and_mapping_await_throwing_ValueTask()
+	{
+		var start = Prelude.Success(2);
+		var result = await start.ThenTryAsync(async ValueTask<Result> (_) =>
+		{
+			await ValueTask.CompletedTask;
+			throw new CustomTestException();
+		});
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_map_non_generic_result_async_and_it_returns_failure_for_failure_ValueTask()
+	{
+		var start = Prelude.Failure("error");
+		var result = await start.MapAsync(() => ValueTask.FromResult(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_async_and_it_returns_success_for_success_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.TryMapAsync(() => ValueTask.FromResult(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_async_and_it_returns_failure_for_failure_ValueTask()
+	{
+		var start = Prelude.Failure("error");
+		var result = await start.TryMapAsync(() => ValueTask.FromResult(42));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_map_non_generic_result_async_and_it_returns_failure_for_await_exception_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.TryMapAsync((Func<ValueTask<int>>)(async () =>
+		{
+			await ValueTask.CompletedTask;
+			throw new CustomTestException();
+		}));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_async_with_then_and_it_returns_success_for_success_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenAsync(() => ValueTask.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_async_with_then_and_it_returns_failure_for_failure_ValueTask()
+	{
+		var start = Prelude.Failure("error");
+		var result = await start.ThenAsync(() => ValueTask.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_and_it_returns_success_for_success_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync(() => ValueTask.FromResult(Prelude.Success()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_and_it_returns_failure_for_exception_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync((Func<ValueTask<Result>>)(() => throw new CustomTestException()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_and_it_returns_failure_for_await_exception_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync((Func<ValueTask<Result>>)(async () =>
+		{
+			await ValueTask.CompletedTask;
+			throw new CustomTestException();
+		}));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_async_with_then_to_generic_and_it_returns_success_for_success_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenAsync(() => ValueTask.FromResult(Prelude.Success(42)));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_transform_non_generic_result_async_with_then_to_generic_and_it_returns_failure_for_failure_ValueTask()
+	{
+		var start = Prelude.Failure("error");
+		var result = await start.ThenAsync(() => ValueTask.FromResult(Prelude.Success(42)));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		await Assert.That(result.Error?.Message).IsEqualTo("error");
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_to_generic_and_it_returns_success_for_success_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync(() => ValueTask.FromResult(Prelude.Success(42)));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsTrue();
+		await Assert.That(result.Value).IsEqualTo(42);
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_to_generic_and_it_returns_failure_for_exception_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync((Func<ValueTask<Result<int>>>)(() => throw new CustomTestException()));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
+
+	[Test]
+	public async Task I_can_try_transform_non_generic_result_async_with_then_to_generic_and_it_returns_failure_for_await_exception_ValueTask()
+	{
+		var start = Prelude.Success();
+		var result = await start.ThenTryAsync((Func<ValueTask<Result<int>>>)(async () =>
+		{
+			await ValueTask.CompletedTask;
+			throw new CustomTestException();
+		}));
+
+		using var scope = Assert.Multiple();
+		await Assert.That(result.IsSuccess).IsFalse();
+		var instance = await Assert.That(result.Error).IsTypeOf<ExceptionError>();
+		await Assert.That(instance?.Exception).IsTypeOf<CustomTestException>();
+	}
 }

src/request.result/IResultFactory.cs

@@ -0,0 +1,20 @@
+// Copyright (c) The Geekeey Authors
+// SPDX-License-Identifier: EUPL-1.2
+
+using System.Diagnostics.CodeAnalysis;
+
+namespace Geekeey.Request.Result;
+
+/// <summary>
+/// An interface for a result.
+/// </summary>
+[SuppressMessage("Naming", "CA1716:Identifiers should not match keywords")]
+public interface IResultFactory<out TSelf> where TSelf : IResultFactory<TSelf>
+{
+	/// <summary>
+	/// Creates a new result with a failure value.
+	/// </summary>
+	/// <param name="error">The error of the result.</param>
+	/// <returns>A new result with a failure value.</returns>
+	static abstract TSelf Failure(Error error);
+}

src/request.result/Prelude.cs

@@ -14,6 +14,25 @@ namespace Geekeey.Request.Result;
 /// </remarks>
 public static class Prelude
 {
+	/// <summary>
+	/// Creates a result containing a success.
+	/// </summary>
+	[Pure]
+	public static Result Success()
+	{
+		return new Result();
+	}
+
+	/// <summary>
+	/// Creates a result containing a failure.
+	/// </summary>
+	/// <param name="error">The failure value to create the result from.</param>
+	[Pure]
+	public static Result Failure(Error error)
+	{
+		return new Result(error);
+	}
+
 	/// <summary>
 	/// Creates a result containing a success value.
 	/// </summary>
@@ -36,6 +55,69 @@ public static class Prelude
 		return new Result<T>(error);
 	}
 
+	/// <summary>
+	/// Tries to execute an action and return the result. If the action throws an exception, the exception will be
+	/// returned wrapped in an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="function">The action to try to execute.</param>
+	/// <returns>A result containing success or an <see cref="ExceptionError"/> containing the exception thrown by the
+	/// action.</returns>
+	[Pure]
+	public static Result Try(Action function)
+	{
+		try
+		{
+			function();
+			return new Result();
+		}
+		catch (Exception exception)
+		{
+			return new Result(new ExceptionError(exception));
+		}
+	}
+
+	/// <summary>
+	/// Tries to execute an asynchronous function and return the result. If the function throws an exception, the
+	/// exception will be returned wrapped in an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="function">The function to try to execute.</param>
+	/// <returns>A result containing success or an <see cref="ExceptionError"/> containing the exception thrown by the
+	/// function.</returns>
+	[Pure]
+	public static async ValueTask<Result> TryAsync(Func<ValueTask> function)
+	{
+		try
+		{
+			await function();
+			return new Result();
+		}
+		catch (Exception exception)
+		{
+			return new Result(new ExceptionError(exception));
+		}
+	}
+
+	/// <summary>
+	/// Tries to execute an asynchronous function and return the result. If the function throws an exception, the
+	/// exception will be returned wrapped in an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="function">The function to try to execute.</param>
+	/// <returns>A result containing success or an <see cref="ExceptionError"/> containing the exception thrown by the
+	/// function.</returns>
+	[Pure]
+	public static async Task<Result> TryAsync(Func<Task> function)
+	{
+		try
+		{
+			await function();
+			return new Result();
+		}
+		catch (Exception exception)
+		{
+			return new Result(new ExceptionError(exception));
+		}
+	}
+
 	/// <summary>
 	/// Tries to execute a function and return the result. If the function throws an exception, the exception will be
 	/// returned wrapped in an <see cref="ExceptionError"/>.

src/request.result/Result.Conversion.cs

@@ -5,7 +5,20 @@ using System.Diagnostics.Contracts;
 
 namespace Geekeey.Request.Result;
 
-public readonly partial struct Result<T>
+public partial class Result
+{
+	/// <summary>
+	/// Implicitly constructs a result from a failure value.
+	/// </summary>
+	/// <param name="error">The error to construct the result from.</param>
+	[Pure]
+	public static implicit operator Result(Error error)
+	{
+		return new Result(error);
+	}
+}
+
+public partial class Result<T>
 {
 	/// <summary>
 	/// Implicitly constructs a result from a success value.

src/request.result/Result.Equality.cs

@@ -7,7 +7,73 @@ using System.Numerics;
 
 namespace Geekeey.Request.Result;
 
-public readonly partial struct Result<T> : IEquatable<Result<T>>, IEquatable<T>
+public partial class Result : IEquatable<Result>
+{
+	/// <inheritdoc/>
+	[Pure]
+	public bool Equals(Result? other)
+	{
+		return Equals(this, other);
+	}
+
+	/// <inheritdoc/>
+	[Pure]
+	public override bool Equals(object? obj)
+	{
+		return obj is Result r && Equals(r);
+	}
+
+	/// <inheritdoc/>
+	[Pure]
+	public override int GetHashCode()
+	{
+		return GetHashCode(this);
+	}
+
+	internal static bool Equals(Result? a, Result? b)
+	{
+		if (a is null || b is null)
+		{
+			return a is null && b is null;
+		}
+
+		return a.IsSuccess == b.IsSuccess;
+	}
+
+	internal static int GetHashCode(Result? result)
+	{
+		return result?.IsSuccess.GetHashCode() ?? 0;
+	}
+}
+
+public partial class Result : IEqualityOperators<Result, Result, bool>
+{
+	/// <summary>
+	/// Checks whether two results are equal. Results are equal if they are both success or both failure.
+	/// </summary>
+	/// <param name="a">The first result to compare.</param>
+	/// <param name="b">The second result to compare.</param>
+	[Pure]
+	[ExcludeFromCodeCoverage]
+	public static bool operator ==(Result? a, Result? b)
+	{
+		return Equals(a, b);
+	}
+
+	/// <summary>
+	/// Checks whether two results are not equal. Results are equal if they are both success or both failure.
+	/// </summary>
+	/// <param name="a">The first result to compare.</param>
+	/// <param name="b">The second result to compare.</param>
+	[Pure]
+	[ExcludeFromCodeCoverage]
+	public static bool operator !=(Result? a, Result? b)
+	{
+		return !Equals(a, b);
+	}
+}
+
+public partial class Result<T> : IEquatable<Result<T>>, IEquatable<T>
 {
 	/// <summary>
 	/// Checks whether the result is equal to another result. Results are equal if both results are success values and
@@ -15,7 +81,7 @@ public readonly partial struct Result<T> : IEquatable<Result<T>>, IEquatable<T>
 	/// </summary>
 	/// <param name="other">The result to check for equality with the current result.</param>
 	[Pure]
-	public bool Equals(Result<T> other)
+	public bool Equals(Result<T>? other)
 	{
 		return Equals(this, other, EqualityComparer<T>.Default);
 	}
@@ -68,8 +134,13 @@ public readonly partial struct Result<T> : IEquatable<Result<T>>, IEquatable<T>
 		return GetHashCode(this, EqualityComparer<T>.Default);
 	}
 
-	internal static bool Equals(Result<T> a, Result<T> b, IEqualityComparer<T> comparer)
+	internal static bool Equals(Result<T>? a, Result<T>? b, IEqualityComparer<T> comparer)
 	{
+		if (a is null || b is null)
+		{
+			return a is null && b is null;
+		}
+
 		if (!a.IsSuccess || !b.IsSuccess)
 		{
 			return !a.IsSuccess && !b.IsSuccess;
@@ -83,8 +154,13 @@ public readonly partial struct Result<T> : IEquatable<Result<T>>, IEquatable<T>
 		return comparer.Equals(a.Value, b.Value);
 	}
 
-	internal static bool Equals(Result<T> a, T? b, IEqualityComparer<T> comparer)
+	internal static bool Equals(Result<T>? a, T? b, IEqualityComparer<T> comparer)
 	{
+		if (a is null)
+		{
+			return b is null;
+		}
+
 		if (!a.IsSuccess)
 		{
 			return false;
@@ -109,7 +185,7 @@ public readonly partial struct Result<T> : IEquatable<Result<T>>, IEquatable<T>
 	}
 }
 
-public readonly partial struct Result<T> : IEqualityOperators<Result<T>, Result<T>, bool>, IEqualityOperators<Result<T>, T, bool>
+public partial class Result<T> : IEqualityOperators<Result<T>, Result<T>, bool>, IEqualityOperators<Result<T>, T, bool>
 {
 	/// <summary>
 	/// Checks whether two results are equal. Results are equal if both results are success values and the success
@@ -119,7 +195,7 @@ public readonly partial struct Result<T> : IEqualityOperators<Result<T>, Result<
 	/// <param name="b">The second result to compare.</param>
 	[Pure]
 	[ExcludeFromCodeCoverage]
-	public static bool operator ==(Result<T> a, Result<T> b)
+	public static bool operator ==(Result<T>? a, Result<T>? b)
 	{
 		return Equals(a, b, EqualityComparer<T>.Default);
 	}
@@ -132,7 +208,7 @@ public readonly partial struct Result<T> : IEqualityOperators<Result<T>, Result<
 	/// <param name="b">The second result to compare.</param>
 	[Pure]
 	[ExcludeFromCodeCoverage]
-	public static bool operator !=(Result<T> a, Result<T> b)
+	public static bool operator !=(Result<T>? a, Result<T>? b)
 	{
 		return !Equals(a, b, EqualityComparer<T>.Default);
 	}
@@ -144,7 +220,7 @@ public readonly partial struct Result<T> : IEqualityOperators<Result<T>, Result<
 	/// <param name="b">The value to check for equality with the success value in the result.</param>
 	[Pure]
 	[ExcludeFromCodeCoverage]
-	public static bool operator ==(Result<T> a, T? b)
+	public static bool operator ==(Result<T>? a, T? b)
 	{
 		return Equals(a, b, EqualityComparer<T>.Default);
 	}
@@ -156,7 +232,7 @@ public readonly partial struct Result<T> : IEqualityOperators<Result<T>, Result<
 	/// <param name="b">The value to check for inequality with the success value in the result.</param>
 	[Pure]
 	[ExcludeFromCodeCoverage]
-	public static bool operator !=(Result<T> a, T? b)
+	public static bool operator !=(Result<T>? a, T? b)
 	{
 		return !Equals(a, b, EqualityComparer<T>.Default);
 	}

src/request.result/Result.Matching.cs

@@ -5,7 +5,102 @@ using System.Diagnostics.Contracts;
 
 namespace Geekeey.Request.Result;
 
-public readonly partial struct Result<T>
+public partial class Result
+{
+	/// <summary>
+	/// Matches over the success or failure of the result and returns another value. Can be conceptualized as an
+	/// exhaustive <c>switch</c> expression matching all possible states of the type.
+	/// </summary>
+	/// <typeparam name="TResult">The type to return from the match.</typeparam>
+	/// <param name="success">The function to invoke if the result is a success.</param>
+	/// <param name="failure">The function to apply to the failure value of the result if the result is a failure.</param>
+	/// <returns>The result of applying either <paramref name="success"/> or <paramref name="failure"/> on the result.</returns>
+	[Pure]
+	public TResult Match<TResult>(Func<TResult> success, Func<Error, TResult> failure)
+	{
+		return IsSuccess ? success() : failure(Error);
+	}
+
+	/// <summary>
+	/// Matches over the success or failure of the result and invokes an effectful action. Can be conceptualized as an
+	/// exhaustive <c>switch</c> statement matching all possible states of the type.
+	/// </summary>
+	/// <param name="success">The function to call if the result is a success.</param>
+	/// <param name="failure">The function to call with the failure value of the result if the result is a failure.</param>
+	public void Switch(Action success, Action<Error> failure)
+	{
+		if (IsSuccess)
+		{
+			success();
+		}
+		else
+		{
+			failure(Error);
+		}
+	}
+}
+
+public partial class Result
+{
+	/// <summary>
+	/// Asynchronously matches over the success or failure of the result and returns another value. Can be
+	/// conceptualized as an exhaustive <c>switch</c> expression matching all possible states of the type.
+	/// </summary>
+	/// <typeparam name="TResult">The type to return from the match.</typeparam>
+	/// <param name="success">The function to invoke if the result is a success.</param>
+	/// <param name="failure">The function to apply to the failure value of the result if the result is a failure.</param>
+	/// <returns>A task completing with the result of applying either <paramref name="success"/> or
+	/// <paramref name="failure"/> on the failure value of the result.</returns>
+	[Pure]
+	public async Task<TResult> MatchAsync<TResult>(Func<Task<TResult>> success, Func<Error, Task<TResult>> failure)
+	{
+		return IsSuccess ? await success() : await failure(Error);
+	}
+
+	/// <summary>
+	/// Asynchronously matches over the success or failure of the result and invokes an effectful action onto the
+	/// failure value. Can be conceptualized as an exhaustive <c>switch</c> statement matching all possible states of
+	/// the type.
+	/// </summary>
+	/// <param name="success">The function to call if the result is a success.</param>
+	/// <param name="failure">The function to call with the failure value of the result if the result is a failure.</param>
+	public Task SwitchAsync(Func<Task> success, Func<Error, Task> failure)
+	{
+		return IsSuccess ? success() : failure(Error);
+	}
+}
+
+public partial class Result
+{
+	/// <summary>
+	/// Asynchronously matches over the success or failure of the result and returns another value. Can be
+	/// conceptualized as an exhaustive <c>switch</c> expression matching all possible states of the type.
+	/// </summary>
+	/// <typeparam name="TResult">The type to return from the match.</typeparam>
+	/// <param name="success">The function to invoke if the result is a success.</param>
+	/// <param name="failure">The function to apply to the failure value of the result if the result is a failure.</param>
+	/// <returns>A task completing with the result of applying either <paramref name="success"/> or
+	/// <paramref name="failure"/> on the failure value of the result.</returns>
+	[Pure]
+	public ValueTask<TResult> MatchAsync<TResult>(Func<ValueTask<TResult>> success, Func<Error, ValueTask<TResult>> failure)
+	{
+		return IsSuccess ? success() : failure(Error);
+	}
+
+	/// <summary>
+	/// Asynchronously matches over the success or failure of the result and invokes an effectful action onto the
+	/// failure value. Can be conceptualized as an exhaustive <c>switch</c> statement matching all possible states of
+	/// the type.
+	/// </summary>
+	/// <param name="success">The function to call if the result is a success.</param>
+	/// <param name="failure">The function to call with the failure value of the result if the result is a failure.</param>
+	public ValueTask SwitchAsync(Func<ValueTask> success, Func<Error, ValueTask> failure)
+	{
+		return IsSuccess ? success() : failure(Error);
+	}
+}
+
+public partial class Result<T>
 {
 	/// <summary>
 	/// Matches over the success value or failure value of the result and returns another value. Can be conceptualized
@@ -42,7 +137,7 @@ public readonly partial struct Result<T>
 	}
 }
 
-public readonly partial struct Result<T>
+public partial class Result<T>
 {
 	/// <summary>
 	/// Asynchronously matches over the success value or failure value of the result and returns another value. Can be
@@ -73,7 +168,7 @@ public readonly partial struct Result<T>
 	}
 }
 
-public readonly partial struct Result<T>
+public partial class Result<T>
 {
 	/// <summary>
 	/// Asynchronously matches over the success value or failure value of the result and returns another value. Can be

src/request.result/Result.Transform.cs

@@ -5,7 +5,7 @@ using System.Diagnostics.Contracts;
 
 namespace Geekeey.Request.Result;
 
-public readonly partial struct Result<T>
+public partial class Result<T>
 {
 	/// <summary>
 	/// Maps the success value of the result using a mapping function, or does nothing if the result is a failure.
@@ -79,7 +79,7 @@ public readonly partial struct Result<T>
 	}
 }
 
-public readonly partial struct Result<T>
+public partial class Result<T>
 {
 	/// <summary>
 	/// Maps the success value of the result using an asynchronous mapping function, or does nothing if the result is
@@ -222,7 +222,7 @@ public readonly partial struct Result<T>
 	}
 }
 
-public readonly partial struct Result<T>
+public partial class Result<T>
 {
 	/// <summary>
 	/// Maps the success value of the result using an asynchronous mapping function, or does nothing if the result is
@@ -364,3 +364,696 @@ public readonly partial struct Result<T>
 		}
 	}
 }
+
+public partial class Result<T>
+{
+	/// <summary>
+	/// Chains a non-generic result to this result if it is a success, or does nothing if the result is a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A result which is either the mapped result or a new result containing the failure value of the original
+	/// result.</returns>
+	[Pure]
+	public Result Then(Func<T, Result> func)
+	{
+		return IsSuccess ? func(Value) : new Result(Error);
+	}
+
+	/// <summary>
+	/// Tries to chain a non-generic result to this result if it is a success, or does nothing if the result is a
+	/// failure. If the function throws an exception, the exception will be returned wrapped in an
+	/// <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A result which is either the mapped result, the exception thrown by <paramref name="func"/> wrapped in
+	/// an <see cref="ExceptionError"/>, or a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Result ThenTry(Func<T, Result> func)
+	{
+		try
+		{
+			return Then(func);
+		}
+		catch (Exception exception)
+		{
+			return new Result(new ExceptionError(exception));
+		}
+	}
+}
+
+public partial class Result<T>
+{
+	/// <summary>
+	/// Chains a non-generic result to this result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result> ThenAsync(Func<T, Task<Result>> func)
+	{
+		if (!IsSuccess)
+		{
+			return Task.FromResult(new Result(Error));
+		}
+
+		var task = func(Value);
+		return CreateResult(task);
+
+		static async Task<Result> CreateResult(Task<Result> task)
+		{
+			var result = await task;
+			return result;
+		}
+	}
+
+	/// <summary>
+	/// Tries to chain a non-generic result to this result using an asynchronous mapping function, or does nothing if the
+	/// result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in
+	/// an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function,
+	/// returning any exception thrown by <paramref name="func"/> wrapped in an <see cref="ExceptionError"/>, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result> ThenTryAsync(Func<T, Task<Result>> func)
+	{
+		if (!IsSuccess)
+		{
+			return Task.FromResult(new Result(Error));
+		}
+
+		try
+		{
+			var task = func(Value);
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return Task.FromResult(new Result(new ExceptionError(exception)));
+		}
+
+		static async Task<Result> CreateResult(Task<Result> task)
+		{
+			try
+			{
+				var value = await task;
+				return value;
+			}
+			catch (Exception exception)
+			{
+				return new Result(new ExceptionError(exception));
+			}
+		}
+	}
+}
+
+public partial class Result<T>
+{
+	/// <summary>
+	/// Chains a non-generic result to this result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result> ThenAsync(Func<T, ValueTask<Result>> func)
+	{
+		if (!IsSuccess)
+		{
+			return ValueTask.FromResult(new Result(Error));
+		}
+
+		var task = func(Value);
+		return CreateResult(task);
+
+		static async ValueTask<Result> CreateResult(ValueTask<Result> task)
+		{
+			var result = await task;
+			return result;
+		}
+	}
+
+	/// <summary>
+	/// Tries to chain a non-generic result to this result using an asynchronous mapping function, or does nothing if the
+	/// result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in
+	/// an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function,
+	/// returning any exception thrown by <paramref name="func"/> wrapped in an <see cref="ExceptionError"/>, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result> ThenTryAsync(Func<T, ValueTask<Result>> func)
+	{
+		if (!IsSuccess)
+		{
+			return ValueTask.FromResult(new Result(Error));
+		}
+
+		try
+		{
+			var task = func(Value);
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return ValueTask.FromResult(new Result(new ExceptionError(exception)));
+		}
+
+		static async ValueTask<Result> CreateResult(ValueTask<Result> task)
+		{
+			try
+			{
+				var value = await task;
+				return value;
+			}
+			catch (Exception exception)
+			{
+				return new Result(new ExceptionError(exception));
+			}
+		}
+	}
+}
+
+public partial class Result
+{
+	/// <summary>
+	/// Maps the success of the result to a new success value using a mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success to a new value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A new result containing either the mapped success value or the failure value of the original
+	/// result.</returns>
+	[Pure]
+	public Result<TNew> Map<TNew>(Func<TNew> func)
+	{
+		return IsSuccess ? new Result<TNew>(func()) : new Result<TNew>(Error);
+	}
+
+	/// <summary>
+	/// Tries to map the success of the result to a new success value using a mapping function, or does nothing if the
+	/// result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in an
+	/// <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success to a new value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A new result containing either the mapped value, the exception thrown by <paramref name="func"/>
+	/// wrapped in an <see cref="ExceptionError"/>, or the failure value of the original result.</returns>
+	[Pure]
+	public Result<TNew> TryMap<TNew>(Func<TNew> func)
+	{
+		try
+		{
+			return Map(func);
+		}
+		catch (Exception exception)
+		{
+			return new Result<TNew>(new ExceptionError(exception));
+		}
+	}
+
+	/// <summary>
+	/// Chains another result to this result if it is a success, or does nothing if the result is a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A result which is either the mapped result or a new result containing the failure value of the original
+	/// result.</returns>
+	[Pure]
+	public Result Then(Func<Result> func)
+	{
+		return IsSuccess ? func() : new Result(Error);
+	}
+
+	/// <summary>
+	/// Tries to chain another result to this result if it is a success, or does nothing if the result is a failure. If
+	/// the function throws an exception, the exception will be returned wrapped in an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A result which is either the mapped result, the exception thrown by <paramref name="func"/> wrapped in
+	/// an <see cref="ExceptionError"/>, or a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Result ThenTry(Func<Result> func)
+	{
+		try
+		{
+			return Then(func);
+		}
+		catch (Exception exception)
+		{
+			return new Result(new ExceptionError(exception));
+		}
+	}
+
+	/// <summary>
+	/// Chains a generic result to this result if it is a success, or does nothing if the result is a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next generic result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A result which is either the mapped result or a new result containing the failure value of the original
+	/// result.</returns>
+	[Pure]
+	public Result<TNew> Then<TNew>(Func<Result<TNew>> func)
+	{
+		return IsSuccess ? func() : new Result<TNew>(Error);
+	}
+
+	/// <summary>
+	/// Tries to chain a generic result to this result if it is a success, or does nothing if the result is a failure. If
+	/// the function throws an exception, the exception will be returned wrapped in an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next generic result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A result which is either the mapped result, the exception thrown by <paramref name="func"/> wrapped in
+	/// an <see cref="ExceptionError"/>, or a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Result<TNew> ThenTry<TNew>(Func<Result<TNew>> func)
+	{
+		try
+		{
+			return Then(func);
+		}
+		catch (Exception exception)
+		{
+			return new Result<TNew>(new ExceptionError(exception));
+		}
+	}
+}
+
+public partial class Result
+{
+	/// <summary>
+	/// Maps the success of the result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function and
+	/// constructing a new result containing the mapped value, or completes synchronously by returning a new result
+	/// containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result<TNew>> MapAsync<TNew>(Func<Task<TNew>> func)
+	{
+		if (!IsSuccess)
+		{
+			return Task.FromResult(new Result<TNew>(Error));
+		}
+
+		var task = func();
+		return CreateResult(task);
+
+		static async Task<Result<TNew>> CreateResult(Task<TNew> task)
+		{
+			var value = await task;
+			return new Result<TNew>(value);
+		}
+	}
+
+	/// <summary>
+	/// Maps the success of the result using an asynchronous mapping function, or does nothing if the result is a
+	/// failure. If the mapping function throws an exception, the exception will be returned wrapped in an
+	/// <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function and
+	/// constructing a new result containing the mapped value, returning any exception thrown by <paramref name="func"/>
+	/// wrapped in an <see cref="ExceptionError"/> or completes synchronously by returning a new result containing the
+	/// failure value of the original result.</returns>
+	[Pure]
+	public Task<Result<TNew>> TryMapAsync<TNew>(Func<Task<TNew>> func)
+	{
+		if (!IsSuccess)
+		{
+			return Task.FromResult(new Result<TNew>(Error));
+		}
+
+		try
+		{
+			var task = func();
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return Task.FromResult(new Result<TNew>(new ExceptionError(exception)));
+		}
+
+		static async Task<Result<TNew>> CreateResult(Task<TNew> task)
+		{
+			try
+			{
+				var value = await task;
+				return new Result<TNew>(value);
+			}
+			catch (Exception exception)
+			{
+				return new Result<TNew>(new ExceptionError(exception));
+			}
+		}
+	}
+
+	/// <summary>
+	/// Chains another result to this result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result> ThenAsync(Func<Task<Result>> func)
+	{
+		if (!IsSuccess)
+		{
+			return Task.FromResult(new Result(Error));
+		}
+
+		var task = func();
+		return CreateResult(task);
+
+		static async Task<Result> CreateResult(Task<Result> task)
+		{
+			var result = await task;
+			return result;
+		}
+	}
+
+	/// <summary>
+	/// Tries to chain another result to this result using an asynchronous mapping function, or does nothing if the
+	/// result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in
+	/// an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function,
+	/// returning any exception thrown by <paramref name="func"/> wrapped in an <see cref="ExceptionError"/>, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result> ThenTryAsync(Func<Task<Result>> func)
+	{
+		if (!IsSuccess)
+		{
+			return Task.FromResult(new Result(Error));
+		}
+
+		try
+		{
+			var task = func();
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return Task.FromResult(new Result(new ExceptionError(exception)));
+		}
+
+		static async Task<Result> CreateResult(Task<Result> task)
+		{
+			try
+			{
+				var value = await task;
+				return value;
+			}
+			catch (Exception exception)
+			{
+				return new Result(new ExceptionError(exception));
+			}
+		}
+	}
+
+	/// <summary>
+	/// Chains a generic result to this result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result<TNew>> ThenAsync<TNew>(Func<Task<Result<TNew>>> func)
+	{
+		if (!IsSuccess)
+		{
+			return Task.FromResult(new Result<TNew>(Error));
+		}
+
+		var task = func();
+		return CreateResult(task);
+
+		static async Task<Result<TNew>> CreateResult(Task<Result<TNew>> task)
+		{
+			var result = await task;
+			return result;
+		}
+	}
+
+	/// <summary>
+	/// Tries to chain a generic result to this result using an asynchronous mapping function, or does nothing if the
+	/// result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in
+	/// an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="Task{T}"/> which either completes asynchronously by invoking the mapping function,
+	/// returning any exception thrown by <paramref name="func"/> wrapped in an <see cref="ExceptionError"/>, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public Task<Result<TNew>> ThenTryAsync<TNew>(Func<Task<Result<TNew>>> func)
+	{
+		if (!IsSuccess)
+		{
+			return Task.FromResult(new Result<TNew>(Error));
+		}
+
+		try
+		{
+			var task = func();
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return Task.FromResult(new Result<TNew>(new ExceptionError(exception)));
+		}
+
+		static async Task<Result<TNew>> CreateResult(Task<Result<TNew>> task)
+		{
+			try
+			{
+				var value = await task;
+				return value;
+			}
+			catch (Exception exception)
+			{
+				return new Result<TNew>(new ExceptionError(exception));
+			}
+		}
+	}
+}
+
+public partial class Result
+{
+	/// <summary>
+	/// Maps the success of the result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to map the success.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function and
+	/// constructing a new result containing the mapped value, or completes synchronously by returning a new result
+	/// containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result<TNew>> MapAsync<TNew>(Func<ValueTask<TNew>> func)
+	{
+		if (!IsSuccess)
+		{
+			return ValueTask.FromResult(new Result<TNew>(Error));
+		}
+
+		var task = func();
+		return CreateResult(task);
+
+		static async ValueTask<Result<TNew>> CreateResult(ValueTask<TNew> task)
+		{
+			var value = await task;
+			return new Result<TNew>(value);
+		}
+	}
+
+	/// <summary>
+	/// Maps the success of the result using an asynchronous mapping function, or does nothing if the result is a
+	/// failure. If the mapping function throws an exception, the exception will be returned wrapped in an
+	/// <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to map the success.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function and
+	/// constructing a new result containing the mapped value, returning any exception thrown by <paramref name="func"/>
+	/// wrapped in an <see cref="ExceptionError"/> or completes synchronously by returning a new result containing the
+	/// failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result<TNew>> TryMapAsync<TNew>(Func<ValueTask<TNew>> func)
+	{
+		if (!IsSuccess)
+		{
+			return ValueTask.FromResult(new Result<TNew>(Error));
+		}
+
+		try
+		{
+			var task = func();
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return ValueTask.FromResult(new Result<TNew>(new ExceptionError(exception)));
+		}
+
+		static async ValueTask<Result<TNew>> CreateResult(ValueTask<TNew> task)
+		{
+			try
+			{
+				var value = await task;
+				return new Result<TNew>(value);
+			}
+			catch (Exception exception)
+			{
+				return new Result<TNew>(new ExceptionError(exception));
+			}
+		}
+	}
+
+	/// <summary>
+	/// Chains another result to this result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result> ThenAsync(Func<ValueTask<Result>> func)
+	{
+		if (!IsSuccess)
+		{
+			return ValueTask.FromResult(new Result(Error));
+		}
+
+		var task = func();
+		return CreateResult(task);
+
+		static async ValueTask<Result> CreateResult(ValueTask<Result> task)
+		{
+			var result = await task;
+			return result;
+		}
+	}
+
+	/// <summary>
+	/// Tries to chain another result to this result using an asynchronous mapping function, or does nothing if the
+	/// result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in
+	/// an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function,
+	/// returning any exception thrown by <paramref name="func"/> wrapped in an <see cref="ExceptionError"/>, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result> ThenTryAsync(Func<ValueTask<Result>> func)
+	{
+		if (!IsSuccess)
+		{
+			return ValueTask.FromResult(new Result(Error));
+		}
+
+		try
+		{
+			var task = func();
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return ValueTask.FromResult(new Result(new ExceptionError(exception)));
+		}
+
+		static async ValueTask<Result> CreateResult(ValueTask<Result> task)
+		{
+			try
+			{
+				var value = await task;
+				return value;
+			}
+			catch (Exception exception)
+			{
+				return new Result(new ExceptionError(exception));
+			}
+		}
+	}
+
+	/// <summary>
+	/// Chains a generic result to this result using an asynchronous mapping function, or does nothing if the result is
+	/// a failure.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result<TNew>> ThenAsync<TNew>(Func<ValueTask<Result<TNew>>> func)
+	{
+		if (!IsSuccess)
+		{
+			return ValueTask.FromResult(new Result<TNew>(Error));
+		}
+
+		var task = func();
+		return CreateResult(task);
+
+		static async ValueTask<Result<TNew>> CreateResult(ValueTask<Result<TNew>> task)
+		{
+			var result = await task;
+			return result;
+		}
+	}
+
+	/// <summary>
+	/// Tries to chain a generic result to this result using an asynchronous mapping function, or does nothing if the
+	/// result is a failure. If the mapping function throws an exception, the exception will be returned wrapped in
+	/// an <see cref="ExceptionError"/>.
+	/// </summary>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A <see cref="ValueTask{T}"/> which either completes asynchronously by invoking the mapping function,
+	/// returning any exception thrown by <paramref name="func"/> wrapped in an <see cref="ExceptionError"/>, or
+	/// completes synchronously by returning a new result containing the failure value of the original result.</returns>
+	[Pure]
+	public ValueTask<Result<TNew>> ThenTryAsync<TNew>(Func<ValueTask<Result<TNew>>> func)
+	{
+		if (!IsSuccess)
+		{
+			return ValueTask.FromResult(new Result<TNew>(Error));
+		}
+
+		try
+		{
+			var task = func();
+			return CreateResult(task);
+		}
+		catch (Exception exception)
+		{
+			return ValueTask.FromResult(new Result<TNew>(new ExceptionError(exception)));
+		}
+
+		static async ValueTask<Result<TNew>> CreateResult(ValueTask<Result<TNew>> task)
+		{
+			try
+			{
+				var value = await task;
+				return value;
+			}
+			catch (Exception exception)
+			{
+				return new Result<TNew>(new ExceptionError(exception));
+			}
+		}
+	}
+}

src/request.result/Result.Unbox.cs

@@ -6,7 +6,7 @@ using System.Diagnostics.Contracts;
 
 namespace Geekeey.Request.Result;
 
-public readonly partial struct Result<T>
+public partial class Result<T>
 {
 	/// <summary>
 	/// Tries to get the success value from the result.

src/request.result/Result.cs

@@ -10,18 +10,13 @@ namespace Geekeey.Request.Result;
 /// <summary>
 /// A type which contains either a success value or a failure value, which is represented by an <see cref="Error"/>.
 /// </summary>
-/// <typeparam name="T">The type of the success value.</typeparam>
+public partial class Result : IResultFactory<Result>
-[DebuggerTypeProxy(typeof(Result<>.ResultDebugProxy))]
-public readonly partial struct Result<T>
 {
 	/// <summary>
 	/// Creates a new result with a success value.
 	/// </summary>
-	/// <param name="value">The success value.</param>
+	public Result()
-	public Result(T value)
 	{
-		IsSuccess = true;
-		Value = value;
 		Error = default;
 	}
 
@@ -31,14 +26,17 @@ public readonly partial struct Result<T>
 	/// <param name="error">The error of the result.</param>
 	public Result(Error error)
 	{
-		IsSuccess = false;
-		Value = default;
 		Error = error;
 	}
 
-	internal T? Value { get; }
+	/// <summary>
-
+	/// Represents the error associated with a failed result.
-	internal Error? Error => IsSuccess ? null : (field ?? Error.DefaultValueError);
+	/// </summary>
+	/// <remarks>
+	/// When a result is unsuccessful, this property will hold an instance of a type derived from <see cref="Error"/>.
+	/// It is null when the result is successful.
+	/// </remarks>
+	public Error? Error { get; }
 
 	/// <summary>
 	/// Whether the result is a success.
@@ -46,9 +44,8 @@ public readonly partial struct Result<T>
 	/// <remarks>
 	/// This is always the inverse of <see cref="IsFailure"/> but is more specific about intent.
 	/// </remarks>
-	[MemberNotNullWhen(true, nameof(Value))]
 	[MemberNotNullWhen(false, nameof(Error))]
-	public bool IsSuccess { get; }
+	public virtual bool IsSuccess => Error is null;
 
 	/// <summary>
 	/// Whether the result is a failure.
@@ -57,8 +54,74 @@ public readonly partial struct Result<T>
 	/// This is always the inverse of <see cref="IsSuccess"/> but is more specific about intent.
 	/// </remarks>
 	[MemberNotNullWhen(true, nameof(Error))]
+	public virtual bool IsFailure => !IsSuccess;
+
+	/// <inheritdoc/>
+	[Pure]
+	static Result IResultFactory<Result>.Failure(Error error)
+	{
+		return new Result(error);
+	}
+
+	/// <summary>
+	/// Gets a string representation of the result.
+	/// </summary>
+	[Pure]
+	public override string ToString()
+	{
+		return IsSuccess ? $"Success" : $"Failure {{ {Error} }}";
+	}
+}
+
+/// <summary>
+/// A type which contains either a success value or a failure value, which is represented by an <see cref="Error"/>.
+/// </summary>
+/// <typeparam name="T">The type of the success value.</typeparam>
+[DebuggerTypeProxy(typeof(Result<>.ResultDebugProxy))]
+public partial class Result<T> : Result, IResultFactory<Result<T>>
+{
+	/// <summary>
+	/// Creates a new result with a success value.
+	/// </summary>
+	/// <param name="value">The success value.</param>
+	public Result(T value) : base()
+	{
+		Value = value;
+	}
+
+	/// <summary>
+	/// Creates a new result with a failure value.
+	/// </summary>
+	/// <param name="error">The error of the result.</param>
+	public Result(Error error) : base(error)
+	{
+		Value = default;
+	}
+
+	/// <summary>
+	/// Gets the success value of the result if the operation was successful.
+	/// </summary>
+	/// <remarks>
+	/// This property contains the value of type <typeparamref name="T"/> when the result is successful.
+	/// If the result is unsuccessful, this property will be null or default, depending on the type.
+	/// Accessing this property when the result is unsuccessful may raise an exception if not properly handled.
+	/// </remarks>
+	public T? Value { get; }
+
+	/// <inheritdoc/>
+	[MemberNotNullWhen(true, nameof(Value))]
+	public override bool IsSuccess => base.IsSuccess;
+
+	/// <inheritdoc/>
 	[MemberNotNullWhen(false, nameof(Value))]
-	public bool IsFailure => !IsSuccess;
+	public override bool IsFailure => base.IsFailure;
+
+	/// <inheritdoc/>
+	[Pure]
+	static Result<T> IResultFactory<Result<T>>.Failure(Error error)
+	{
+		return new Result<T>(error);
+	}
 
 	/// <summary>
 	/// Gets a string representation of the result.

src/request.result/_extensions/Extensions.Task.cs

@@ -31,6 +31,21 @@ public static partial class Extensions
 		return (await result).Map(func);
 	}
 
+	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result<TNew>> TryMap<T, TNew>(this Task<Result<T>> result, Func<T, TNew> func)
+	{
+		return (await result).TryMap(func);
+	}
+
+	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> MapAsync<T, TNew>(this Task<Result<T>> result, Func<T, Task<TNew>> func)
+	{
+		return await (await result).MapAsync(func);
+	}
+
 	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static async Task<Result<TNew>> MapAsync<T, TNew>(this Task<Result<T>> result, Func<T, ValueTask<TNew>> func)
@@ -38,6 +53,20 @@ public static partial class Extensions
 		return await (await result).MapAsync(func);
 	}
 
+	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> TryMapAsync<T, TNew>(this Task<Result<T>> result, Func<T, Task<TNew>> func)
+	{
+		return await (await result).TryMapAsync(func);
+	}
+
+	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> TryMapAsync<T, TNew>(this Task<Result<T>> result, Func<T, ValueTask<TNew>> func)
+	{
+		return await (await result).TryMapAsync(func);
+	}
+
 	/// <summary>
 	/// Maps the success value of the result object of the completed task to a new result using a mapping function, or
 	/// does nothing if the result object of the completed task is a failure.
@@ -55,6 +84,21 @@ public static partial class Extensions
 		return (await result).Then(func);
 	}
 
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result<TNew>> ThenTry<T, TNew>(this Task<Result<T>> result, Func<T, Result<TNew>> func)
+	{
+		return (await result).ThenTry(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> ThenAsync<T, TNew>(this Task<Result<T>> result, Func<T, Task<Result<TNew>>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
 	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static async Task<Result<TNew>> ThenAsync<T, TNew>(this Task<Result<T>> result, Func<T, ValueTask<Result<TNew>>> func)
@@ -62,6 +106,64 @@ public static partial class Extensions
 		return await (await result).ThenAsync(func);
 	}
 
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> ThenTryAsync<T, TNew>(this Task<Result<T>> result, Func<T, Task<Result<TNew>>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> ThenTryAsync<T, TNew>(this Task<Result<T>> result, Func<T, ValueTask<Result<TNew>>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result> Then<T>(this Task<Result<T>> result, Func<T, Result> func)
+	{
+		return (await result).Then(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result> ThenTry<T>(this Task<Result<T>> result, Func<T, Result> func)
+	{
+		return (await result).ThenTry(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result> ThenAsync<T>(this Task<Result<T>> result, Func<T, Task<Result>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result> ThenAsync<T>(this Task<Result<T>> result, Func<T, ValueTask<Result>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result> ThenTryAsync<T>(this Task<Result<T>> result, Func<T, Task<Result>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result> ThenTryAsync<T>(this Task<Result<T>> result, Func<T, ValueTask<Result>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
 	#endregion
 
 	#region ValueTask<Result<T>>
@@ -74,6 +176,21 @@ public static partial class Extensions
 		return (await result).Map(func);
 	}
 
+	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result<TNew>> TryMap<T, TNew>(this ValueTask<Result<T>> result, Func<T, TNew> func)
+	{
+		return (await result).TryMap(func);
+	}
+
+	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> MapAsync<T, TNew>(this ValueTask<Result<T>> result, Func<T, Task<TNew>> func)
+	{
+		return await (await result).MapAsync(func);
+	}
+
 	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static async ValueTask<Result<TNew>> MapAsync<T, TNew>(this ValueTask<Result<T>> result, Func<T, ValueTask<TNew>> func)
@@ -81,6 +198,20 @@ public static partial class Extensions
 		return await (await result).MapAsync(func);
 	}
 
+	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> TryMapAsync<T, TNew>(this ValueTask<Result<T>> result, Func<T, Task<TNew>> func)
+	{
+		return await (await result).TryMapAsync(func);
+	}
+
+	/// <inheritdoc cref="Map{T,TNew}(Task{Result{T}},Func{T,TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> TryMapAsync<T, TNew>(this ValueTask<Result<T>> result, Func<T, ValueTask<TNew>> func)
+	{
+		return await (await result).TryMapAsync(func);
+	}
+
 	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	// ReSharper disable once InconsistentNaming
@@ -89,6 +220,21 @@ public static partial class Extensions
 		return (await result).Then(func);
 	}
 
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result<TNew>> ThenTry<T, TNew>(this ValueTask<Result<T>> result, Func<T, Result<TNew>> func)
+	{
+		return (await result).ThenTry(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> ThenAsync<T, TNew>(this ValueTask<Result<T>> result, Func<T, Task<Result<TNew>>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
 	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	public static async ValueTask<Result<TNew>> ThenAsync<T, TNew>(this ValueTask<Result<T>> result, Func<T, ValueTask<Result<TNew>>> func)
@@ -96,5 +242,358 @@ public static partial class Extensions
 		return await (await result).ThenAsync(func);
 	}
 
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> ThenTryAsync<T, TNew>(this ValueTask<Result<T>> result, Func<T, Task<Result<TNew>>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> ThenTryAsync<T, TNew>(this ValueTask<Result<T>> result, Func<T, ValueTask<Result<TNew>>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result> Then<T>(this ValueTask<Result<T>> result, Func<T, Result> func)
+	{
+		return (await result).Then(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result> ThenTry<T>(this ValueTask<Result<T>> result, Func<T, Result> func)
+	{
+		return (await result).ThenTry(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result> ThenAsync<T>(this ValueTask<Result<T>> result, Func<T, Task<Result>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result> ThenAsync<T>(this ValueTask<Result<T>> result, Func<T, ValueTask<Result>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result> ThenTryAsync<T>(this ValueTask<Result<T>> result, Func<T, Task<Result>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{T,TNew}(Task{Result{T}},Func{T,Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result> ThenTryAsync<T>(this ValueTask<Result<T>> result, Func<T, ValueTask<Result>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	#endregion
+
+	#region Task<Result>
+
+	/// <summary>
+	/// Maps the success of the result object of the completed task to a new success value using a mapping function, or
+	/// does nothing if the result object of the completed task is a failure.
+	/// </summary>
+	/// <param name="result">A task object returning a result object when completing.</param>
+	/// <param name="func">The function used to map the success to a new value.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A new result containing either the mapped success value or the failure value of the original
+	/// result.</returns>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result<TNew>> Map<TNew>(this Task<Result> result, Func<TNew> func)
+	{
+		return (await result).Map(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result<TNew>> TryMap<TNew>(this Task<Result> result, Func<TNew> func)
+	{
+		return (await result).TryMap(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> MapAsync<TNew>(this Task<Result> result, Func<Task<TNew>> func)
+	{
+		return await (await result).MapAsync(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> MapAsync<TNew>(this Task<Result> result, Func<ValueTask<TNew>> func)
+	{
+		return await (await result).MapAsync(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> TryMapAsync<TNew>(this Task<Result> result, Func<Task<TNew>> func)
+	{
+		return await (await result).TryMapAsync(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> TryMapAsync<TNew>(this Task<Result> result, Func<ValueTask<TNew>> func)
+	{
+		return await (await result).TryMapAsync(func);
+	}
+
+	/// <summary>
+	/// Chains another result to the result object of the completed task if it is a success, or does nothing if the
+	/// result object of the completed task is a failure.
+	/// </summary>
+	/// <param name="result">A task object returning a result object when completing.</param>
+	/// <param name="func">The function used to create the next result.</param>
+	/// <returns>A result which is either the mapped result or a new result containing the failure value of the original
+	/// result.</returns>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result> Then(this Task<Result> result, Func<Result> func)
+	{
+		return (await result).Then(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result> ThenTry(this Task<Result> result, Func<Result> func)
+	{
+		return (await result).ThenTry(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result> ThenAsync(this Task<Result> result, Func<Task<Result>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result> ThenAsync(this Task<Result> result, Func<ValueTask<Result>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result> ThenTryAsync(this Task<Result> result, Func<Task<Result>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result> ThenTryAsync(this Task<Result> result, Func<ValueTask<Result>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <summary>
+	/// Chains a generic result to the result object of the completed task if it is a success, or does nothing if the
+	/// result object of the completed task is a failure.
+	/// </summary>
+	/// <param name="result">A task object returning a result object when completing.</param>
+	/// <param name="func">The function used to create the next generic result.</param>
+	/// <typeparam name="TNew">The type of the new value.</typeparam>
+	/// <returns>A result which is either the mapped result or a new result containing the failure value of the original
+	/// result.</returns>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result<TNew>> Then<TNew>(this Task<Result> result, Func<Result<TNew>> func)
+	{
+		return (await result).Then(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async Task<Result<TNew>> ThenTry<TNew>(this Task<Result> result, Func<Result<TNew>> func)
+	{
+		return (await result).ThenTry(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> ThenAsync<TNew>(this Task<Result> result, Func<Task<Result<TNew>>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> ThenAsync<TNew>(this Task<Result> result, Func<ValueTask<Result<TNew>>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> ThenTryAsync<TNew>(this Task<Result> result, Func<Task<Result<TNew>>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async Task<Result<TNew>> ThenTryAsync<TNew>(this Task<Result> result, Func<ValueTask<Result<TNew>>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	#endregion
+
+	#region ValueTask<Result>
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result<TNew>> Map<TNew>(this ValueTask<Result> result, Func<TNew> func)
+	{
+		return (await result).Map(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result<TNew>> TryMap<TNew>(this ValueTask<Result> result, Func<TNew> func)
+	{
+		return (await result).TryMap(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> MapAsync<TNew>(this ValueTask<Result> result, Func<Task<TNew>> func)
+	{
+		return await (await result).MapAsync(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> MapAsync<TNew>(this ValueTask<Result> result, Func<ValueTask<TNew>> func)
+	{
+		return await (await result).MapAsync(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> TryMapAsync<TNew>(this ValueTask<Result> result, Func<Task<TNew>> func)
+	{
+		return await (await result).TryMapAsync(func);
+	}
+
+	/// <inheritdoc cref="Map{TNew}(Task{Result},Func{TNew})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> TryMapAsync<TNew>(this ValueTask<Result> result, Func<ValueTask<TNew>> func)
+	{
+		return await (await result).TryMapAsync(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result> Then(this ValueTask<Result> result, Func<Result> func)
+	{
+		return (await result).Then(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result> ThenTry(this ValueTask<Result> result, Func<Result> func)
+	{
+		return (await result).ThenTry(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result> ThenAsync(this ValueTask<Result> result, Func<Task<Result>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result> ThenAsync(this ValueTask<Result> result, Func<ValueTask<Result>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result> ThenTryAsync(this ValueTask<Result> result, Func<Task<Result>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then(Task{Result},Func{Result})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result> ThenTryAsync(this ValueTask<Result> result, Func<ValueTask<Result>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result<TNew>> Then<TNew>(this ValueTask<Result> result, Func<Result<TNew>> func)
+	{
+		return (await result).Then(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	// ReSharper disable once InconsistentNaming
+	public static async ValueTask<Result<TNew>> ThenTry<TNew>(this ValueTask<Result> result, Func<Result<TNew>> func)
+	{
+		return (await result).ThenTry(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> ThenAsync<TNew>(this ValueTask<Result> result, Func<Task<Result<TNew>>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> ThenAsync<TNew>(this ValueTask<Result> result, Func<ValueTask<Result<TNew>>> func)
+	{
+		return await (await result).ThenAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> ThenTryAsync<TNew>(this ValueTask<Result> result, Func<Task<Result<TNew>>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
+	/// <inheritdoc cref="Then{TNew}(Task{Result},Func{Result{TNew}})"/>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static async ValueTask<Result<TNew>> ThenTryAsync<TNew>(this ValueTask<Result> result, Func<ValueTask<Result<TNew>>> func)
+	{
+		return await (await result).ThenTryAsync(func);
+	}
+
 	#endregion
 }