[commit: ghc] master: Drop NFData constraint from compact. (5841574)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/58415741882b8e350beaf81ccedb74ee9c99257d/ghc

>---------------------------------------------------------------

commit 58415741882b8e350beaf81ccedb74ee9c99257d
Author: Edward Z. Yang <ezyang at cs.stanford.edu>
Date:   Mon Feb 20 21:50:41 2017 -0800

    Drop NFData constraint from compact.
    
    Summary:
    It's both unsound (easy to write a bogus NFData instance) and
    incomplete (you might want to serialize data that doesn't have
    an NFData instance, and will be fine at runtime.)  So better
    just to drop it.  (By the way, we used to need the NFData
    instance to "pre-evaluate" the data before we copied it into
    the region, but since Simon Marlow rewrote the code to directly
    evaluate and copy, this is no longer necessary.)
    
    Signed-off-by: Edward Z. Yang <ezyang at cs.stanford.edu>
    
    Test Plan: validate
    
    Reviewers: simonmar, austin, dfeuer, bgamari
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D3168


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58415741882b8e350beaf81ccedb74ee9c99257d
 libraries/compact/Data/Compact.hs               | 38 +++++++++++--------------
 libraries/compact/Data/Compact/Internal.hs      |  3 +-
 libraries/compact/Data/Compact/Serialized.hs    | 19 ++++++-------
 libraries/compact/compact.cabal                 |  8 ++----
 libraries/compact/tests/compact_function.hs     |  4 ---
 libraries/compact/tests/compact_huge_array.hs   |  4 ---
 libraries/compact/tests/compact_loop.hs         |  5 ----
 libraries/compact/tests/compact_mutable.hs      |  4 ---
 libraries/compact/tests/compact_pinned.hs       |  1 -
 libraries/compact/tests/compact_serialize.hs    |  3 +-
 libraries/compact/tests/compact_simple_array.hs |  4 ---
 11 files changed, 31 insertions(+), 62 deletions(-)

Diff suppressed because of size. To see it, use:

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc 58415741882b8e350beaf81ccedb74ee9c99257d