unison/unison-src/transcripts/any-extract.output.md

Unit tests for Any.unsafeExtract

Any.unsafeExtract is a way to extract the value contained in an Any. This is unsafe because it allows the programmer to coerce a value into any type, which would cause undefined behaviour if used to coerce a value to the wrong type.

test> Any.unsafeExtract.works = 
  use Nat !=
  checks [1 == Any.unsafeExtract (Any 1), 
          not (1 == Any.unsafeExtract (Any 2)),
          (Some 1) == Any.unsafeExtract (Any (Some 1))
         ]

  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`:
    
      Any.unsafeExtract.works : [Result]
  
  Now evaluating any watch expressions (lines starting with
  `>`)... Ctrl+C cancels.

    3 |   checks [1 == Any.unsafeExtract (Any 1), 
    
    ✅ Passed Passed

.> add

  ⍟ I've added these definitions:
  
    Any.unsafeExtract.works : [Result]