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| author | Tobias Decking <Tobias.Decking@gmail.com> | 2018-12-06 15:32:18 -0500 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2018-12-06 15:33:06 -0500 |
| commit | fb669f51b3f2cae79511ac3d1c43939d951b1f69 (patch) | |
| tree | c131f28650d54ce012d789955718845148b9da20 /docs | |
| parent | 1ef90f990da90036d481c830d8832e21b8f1571b (diff) | |
| download | haskell-fb669f51b3f2cae79511ac3d1c43939d951b1f69.tar.gz | |
Add fusion rules for the zipWith functions in base (#15263)
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
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/8.8.1-notes.rst | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/users_guide/8.8.1-notes.rst b/docs/users_guide/8.8.1-notes.rst index c98c7e386c..ea38029a0a 100644 --- a/docs/users_guide/8.8.1-notes.rst +++ b/docs/users_guide/8.8.1-notes.rst @@ -149,6 +149,10 @@ Template Haskell a representational one. There is really no reason to care about the type of the underlying object. +- The functions ``zipWith3`` and ``zip3`` in ``Prelude`` can now fuse, + together with ``zipWith4`` to ``zipWith7`` as well as their + tuple counterparts in ``Data.List``. + Build system ~~~~~~~~~~~~ |