[commit: ghc] master: Tidy up some convoluted "child/parent" code (7720c29)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/7720c293e7f5ca5089e3d154aad99e8060d6ac63/ghc

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commit 7720c293e7f5ca5089e3d154aad99e8060d6ac63
Author: Simon Peyton Jones <simonpj at microsoft.com>
Date:   Wed Oct 4 10:48:10 2017 +0100

    Tidy up some convoluted "child/parent" code
    
    In investigating something else (Trac #14307) I encountered the
    wonders of TcRnExports.lookupChildrenExport, and the data
    type ChildLookupResult.
    
    I managed to remove the NameErr constructor from ChildLookupResult,
    and simplify the code significantly at the same time.
    
    This is just refactoring; no change in behaviour.


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7720c293e7f5ca5089e3d154aad99e8060d6ac63
 compiler/rename/RnEnv.hs          |  15 ++---
 compiler/typecheck/TcRnExports.hs | 133 +++++++++++++++++---------------------
 2 files changed, 65 insertions(+), 83 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 7720c293e7f5ca5089e3d154aad99e8060d6ac63