2chevskii / result

Result type for C#

result's Issues

Add easy-to-use type conversion

Description

Users (me, in particular) do not like to write too much of <,,,,> stuff,
so we need to be able to allow automatic type conversion between results with different type arguments when they do not affect it's state (see usage examples)

Usage Example

Result<int, ExampleException> DoStuff() {

  if(allOk) {
    return Result.Ok(42); // Result.Ok here returns Result<int, Exception>, so we convert it to Result<int, ExampleException>
  }
 
  return Result.Err(new ExampleException()); // Result.Err here returns Result<object, ExampleException>, so we convert it to Result<int, ExampleException>
}

Since in C# we are not allowed to make generic type casting operators, or in any other
way cast from base classes and interfaces, we probably need some intermediate type like ConvertibleResult<T> which will only hold it's state and current value, without carrying
information about another possible value type

Alternative

No response

Could you help with a pull-request?

Yup

Async mapping

Description

We need to provide less-nested way to map results which are part of an async flow.
For example: Task<Result<T,E>> should be mappable on the top level (without await or ContinueWith usage)

Maybe we should also provide methods for the invert situation (when Result's T or E are Tasks/ValueTasks)

Usage Example

No response

Alternative

No response

Could you help with a pull-request?

Yup