[commit: ghc] master: Implement -fwarn-missing-pat-syn-sigs (1883afb)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/1883afb2eee88c828adf6aa8014bab64dd6e8096/ghc

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commit 1883afb2eee88c828adf6aa8014bab64dd6e8096
Author: Matthew Pickering <matthewtpickering at gmail.com>
Date:   Sat Dec 12 16:38:07 2015 +0000

    Implement -fwarn-missing-pat-syn-sigs
    
    This adds a warning when a pattern synonym is not accompanied by a
    signature in the style of `-fwarn-missing-sigs`.
    
    It is turned on by -Wall.
    
    If the user specifies, `-fwarn-missing-exported-signatures` with
    `-fwarn-missing-pat-syn-sigs` then it will only warn when the pattern
    synonym is exported.
    
    Test Plan: ./validate
    
    Reviewers: hvr, austin, bgamari
    
    Reviewed By: bgamari
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D1596
    
    GHC Trac Issues: #11053


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1883afb2eee88c828adf6aa8014bab64dd6e8096
 compiler/hsSyn/HsBinds.hs                        | 13 +++++-
 compiler/main/DynFlags.hs                        |  7 +++-
 compiler/rename/RnNames.hs                       | 50 ++++++++++++++++--------
 docs/users_guide/7.12.1-notes.rst                |  4 ++
 docs/users_guide/using-warnings.rst              | 11 ++++++
 libraries/base/GHC/Exception.hs                  |  1 +
 testsuite/tests/patsyn/should_compile/all.T      |  2 -
 testsuite/tests/patsyn/should_fail/T11053.hs     | 18 +++++++++
 testsuite/tests/patsyn/should_fail/T11053.stderr | 19 +++++++++
 testsuite/tests/patsyn/should_fail/all.T         |  1 +
 10 files changed, 104 insertions(+), 22 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 1883afb2eee88c828adf6aa8014bab64dd6e8096