[commit: ghc] ghc-8.0: (Alternative way to) address #8710 (680557c)

[git at git.haskell.org]

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

On branch  : ghc-8.0
Link       : http://ghc.haskell.org/trac/ghc/changeset/680557c125021a1f248ef010418b1234d9a2aa4a/ghc

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

commit 680557c125021a1f248ef010418b1234d9a2aa4a
Author: George Karachalias <george.karachalias at gmail.com>
Date:   Thu Feb 25 15:50:35 2016 +0100

    (Alternative way to) address #8710
    
    Issue a separate warning per redundant (or inaccessible) clause.
    This way each warning can have more precice location information
    (the location of the clause under consideration and not the whole
    match).
    
    I thought that this could be too much but actually the number of
    such warnings is bound by the number of cases matched against (in
    contrast to the non-exhaustive warnings which may be exponentially
    more).
    
    Test Plan: validate
    
    Reviewers: simonpj, austin, bgamari
    
    Reviewed By: bgamari
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D1920
    
    GHC Trac Issues: #8710
    
    (cherry picked from commit 67393977489942ef41f4f7d4a77076c15db18b92)


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

680557c125021a1f248ef010418b1234d9a2aa4a
 compiler/deSugar/Check.hs                          | 45 +++++++++++++---------
 .../tests/deSugar/should_compile/T2395.stderr      |  4 +-
 .../tests/deSugar/should_compile/T5117.stderr      |  4 +-
 .../tests/deSugar/should_compile/ds002.stderr      | 16 ++++----
 .../tests/deSugar/should_compile/ds003.stderr      | 12 +++---
 .../tests/deSugar/should_compile/ds019.stderr      | 17 +++++---
 .../tests/deSugar/should_compile/ds020.stderr      | 24 ++++++------
 .../tests/deSugar/should_compile/ds022.stderr      | 12 +++---
 .../tests/deSugar/should_compile/ds043.stderr      |  4 +-
 .../tests/deSugar/should_compile/ds051.stderr      | 12 +++---
 .../tests/deSugar/should_compile/ds056.stderr      |  4 +-
 .../tests/deSugar/should_compile/ds058.stderr      |  4 +-
 testsuite/tests/driver/werror.stderr               |  8 ++--
 testsuite/tests/gadt/T7294.stderr                  |  4 +-
 testsuite/tests/ghci/scripts/Defer02.stderr        |  4 +-
 .../tests/pmcheck/should_compile/pmc003.stderr     |  5 ++-
 .../tests/pmcheck/should_compile/pmc004.stderr     |  5 ++-
 .../tests/pmcheck/should_compile/pmc005.stderr     |  7 ++--
 testsuite/tests/th/TH_repUnboxedTuples.stderr      |  2 +-
 .../tests/typecheck/should_compile/T5490.stderr    |  8 ++--
 20 files changed, 112 insertions(+), 89 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 680557c125021a1f248ef010418b1234d9a2aa4a