Sealed types

Mark Raynsford mark at
Fri Nov 30 16:53:00 UTC 2018

On 2018-11-30T11:16:51 -0500
Brian Goetz <brian.goetz at> wrote:
> Yes.  As mentioned before, I expect unsealing a _class_ to be more 
> common than unsealing an _interface_, because classes have more tools 
> with which to defend against rogue subtypes.

Sounds good, thanks!

Do you have any documentation on how Scala's opt-in (not transitive)
sealing became a source of bugs? This is news to me, I actually would
have expected the opposite.

Mark Raynsford |

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