Add comments about how zip fusion
authorSimon Peyton Jones <simonpj@microsoft.com>
Mon, 18 Feb 2019 09:03:01 +0000 (09:03 +0000)
committerMarge Bot <ben+marge-bot@smart-cactus.org>
Wed, 20 Feb 2019 15:17:34 +0000 (10:17 -0500)
commit2209ea86cbdfb1e08772a41f74b28563119b4385
tree5e449a86bc54aeff90e52cd5eab55369795270e9
parent2e96ce1fced5ea4f005edea2eeab50f67acb9114
Add comments about how zip fusion

Alexandre Balde (rockbmb) points out that the fusion technology
for foldr2, zip, zipWith, etc is undocumented.  This patch adds
comments to explain.
libraries/base/Control/Monad.hs
libraries/base/GHC/List.hs