A modern programming language that makes developers happier.

kotlinlang

the best I can offer (without annotation processing) is:
```
interface AndThen&lt;T&gt;

inline fun &lt;T : AndThen&lt;T&gt;, U&gt; T.andThen(func: (T) -&gt; AndThen&lt;U&gt;): AndThen&lt;U&gt; = func(this)
inline val &lt;T : AndThen&lt;T&gt;&gt; T.value get() = this

sealed class Result&lt;T&gt; : AndThen&lt;Result&lt;T&gt;&gt;
data class SuccessWithValue&lt;T&gt;(val result: T) : Result&lt;T&gt;()
class Success&lt;T&gt;() : Result&lt;T&gt;()
data class Failure&lt;T&gt;(val error: Exception) : Result&lt;T&gt;()
```