• Tobias Decking's avatar
    Add fusion rules for the zipWith functions in base (#15263) · fb669f51
    Tobias Decking authored
    This patch will allow `zip3` and `zipWith3` in `GHC.List` as well
    as `zipWith4`, `zipWith5`, `zipWith6` and `zipWith7` in `Data.OldList` to fuse.
    These rules are kept in a similar style as the rules for `zip` and `zipWith`.
    Added a corresponding test case.
    Test Plan: validate
    Reviewers: hvr, bgamari, simonpj
    Reviewed By: simonpj
    Subscribers: simonpj, rockbmb, rwbarton, carter
    GHC Trac Issues: #15263
    Differential Revision: https://phabricator.haskell.org/D5241
List.hs 37.5 KB