[GHC] #9368: Add strictly accumulating scanl' to Data.List

[GHC]

#9368: Add strictly accumulating scanl' to Data.List
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              Reporter:  dfeuer      |            Owner:
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.8.3
             Component:  Core        |         Keywords:
  Libraries                          |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Easy (less than 1
      Operating System:              |  hour)
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:  #9345
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by thomie):

 * status:  patch => new


Comment:

 {{{
 commit d45693a5384460d22a6437b9cda463b4ec4b6a37
 Author: David Feuer <>
 Date:   Tue Oct 7 20:51:25 2014 +0200

     Make scanl fuse; add scanl'

     Summary:
     Make scanl a good producer and a good consumer for fold/build
     fusion. Add strictly-accumulating scanl', which is required for
     Data.List.inits.

     Reviewers: nomeata, austin

     Reviewed By: austin

     Subscribers: spacekitteh, thomie, carter, ezyang, simonmar

     Differential Revision: https://phabricator.haskell.org/D314

     GHC Trac Issues: #9356
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9368#comment:6>
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