Result and Option types

[Paul Backus]

On Saturday, 25 July 2020 at 18:06:51 UTC, powerboat9 wrote:
> Does dlang have an analog to Result or Option types from rust?

In addition to Nullable in the standard library, there are some 
packages on dub you might find useful:

* optional: an option type that can also function as a range, for 
compatibility with std.algorithm.
   Link: https://code.dlang.org/packages/optional

* expected: a result type with customizable error behavior (can 
panic or throw on failed unwrap) and utility functions for 
monadic error handling (map, andThen, orElse).
   Link: https://code.dlang.org/packages/expected