unison/unison-src/transcripts/update-type-stray-constructor.output.md

unique type Foo = Bar Nat

  Loading changes detected in scratch.u.

  I found and typechecked these definitions in scratch.u. If you
  do an `add` or `update`, here's how your codebase would
  change:
  
    ⍟ These new definitions are ok to `add`:
    
      type Foo

scratch/main> add

  ⍟ I've added these definitions:
  
    type Foo

scratch/main> move.term Foo.Bar Stray.Bar

  Done.

Now we've set up a situation where the constructor is not where it's supposed to be; it's somewhere else.

unique type Foo = Bar Nat Nat

  Loading changes detected in scratch.u.

  I found and typechecked these definitions in scratch.u. If you
  do an `add` or `update`, here's how your codebase would
  change:
  
    ⍟ These names already exist. You can `update` them to your
      new definition:
    
      type Foo

Note that the constructor name shown here (implied to be called Foo.Stray.Bar) doesn't really exist, it's just showing up due to a pretty-printer bug.

scratch/main> view Foo

  type Foo = Stray.Bar Nat

scratch/main> update

  Sorry, I wasn't able to perform the update:
  
  The type Foo has some constructors with missing names, and I
  can't perform an update in this situation.
  
  You can use `view Foo` and
  `alias.term <hash> Foo.<ConstructorName>` to give names to
  each unnamed constructor, and then try the update again.