[commit: ghc] master: Improve kind-checking for 'deriving' clauses (9a34864)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/9a348640c5ddd63c3385d3722fb3ade38013a148/ghc

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commit 9a348640c5ddd63c3385d3722fb3ade38013a148
Author: Simon Peyton Jones <simonpj at microsoft.com>
Date:   Thu Jun 25 15:48:37 2015 +0100

    Improve kind-checking for 'deriving' clauses
    
    The main payload is in 'mk_functor_like_constraints' in
    TcDeriv.inferConstraints.
    
    This is moving towards a fix for Trac #10561


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9a348640c5ddd63c3385d3722fb3ade38013a148
 compiler/typecheck/TcDeriv.hs                      | 44 ++++++++++++++++------
 testsuite/tests/deriving/should_compile/T10561.hs  | 19 ++++++++++
 .../tests/deriving/should_compile/T10561.stderr    |  5 +++
 testsuite/tests/deriving/should_compile/all.T      |  1 +
 testsuite/tests/deriving/should_fail/T9071.stderr  |  7 +---
 .../tests/deriving/should_fail/T9071_2.stderr      |  7 +---
 testsuite/tests/typecheck/should_fail/T9305.stderr |  7 +---
 7 files changed, 63 insertions(+), 27 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 9a348640c5ddd63c3385d3722fb3ade38013a148