Arc Forum | Yeah, it's still a problem. Oddly enough, I only ever noticed it in test code t...

Arc Forum

1 point by fallintothis 5420 days ago | link | parent

Yeah, it's still a problem. Oddly enough, I only ever noticed it in test code that expanded ssyntax tree-wise (vs. Arc's symbol-wise ssexpand). I didn't put deliberate thought into making sscontract aware of the bug, but I think it's avoided because of careful precedence separation.

  arc> (sscontract '(andf f (complement g)))
  (andf f ~g)
  arc> (sscontract '(compose f (complement g)))
  f:~g
  arc> (sscontract '(f ~g))
  (f:complement g) ; ew...should probably return (f ~g)
  arc> (sscontract '(f '~g))
  (f (quote ~g))

Thanks for the andf case, by the way. Hadn't thought of that one. If you find any incorrect contractions, please let me know. If you want, you can use bitbucket's issue tracker: http://bitbucket.org/fallintothis/contract/issues/