This was proposed in https://mail.haskell.org/pipermail/libraries/2015-July/026014.html Edward says the following modules are up for migration: - `Data.Functor.Classes` - `Data.Functor.Product` - `Data.Functor.Sum` - `Data.Functor.Compose` related/optionally/undecided: - `Data.Functor.Reverse` - `Control.Applicative.Backwards` not moved because redundant (c.f. `Const`): - `Data.Functor.Constant` <details><summary>Trac metadata</summary> | Trac field | Value | | ---------------------- | -------------- | | Version | 7.10.2 | | Type | Task | | TypeOfFailure | OtherFailure | | Priority | highest | | Resolution | Unresolved | | Component | libraries/base | | Test case | | | Differential revisions | | | BlockedBy | | | Related | | | Blocking | | | CC | ekmett | | Operating system | | | Architecture | | </details> <!-- {"blocked_by":[],"summary":"Migrate more of Data.Functor.* from transformers to base.","status":"New","operating_system":"","component":"libraries/base","related":[],"milestone":"8.0.1","resolution":"Unresolved","owner":{"tag":"Unowned"},"version":"7.10.2","keywords":[],"differentials":[],"test_case":"","architecture":"","cc":["ekmett"],"type":"Task","description":"This was proposed in https://mail.haskell.org/pipermail/libraries/2015-July/026014.html\r\n\r\nEdward says the following modules are up for migration:\r\n\r\n - `Data.Functor.Classes`\r\n - `Data.Functor.Product`\r\n - `Data.Functor.Sum`\r\n - `Data.Functor.Compose`\r\n\r\nrelated/optionally/undecided:\r\n\r\n - `Data.Functor.Reverse`\r\n - `Control.Applicative.Backwards`\r\n\r\nnot moved because redundant (c.f. `Const`):\r\n\r\n - `Data.Functor.Constant`","type_of_failure":"OtherFailure","blocking":[]} -->