[commit: ghc] master: Add Note [Role twiddling functions] to Coercion. (91cc88b)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/91cc88b3d2dbbd64c63d6359bd32cf3ba3f546ab/ghc

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

commit 91cc88b3d2dbbd64c63d6359bd32cf3ba3f546ab
Author: Richard Eisenberg <eir at cis.upenn.edu>
Date:   Tue Apr 29 11:55:56 2014 -0400

    Add Note [Role twiddling functions] to Coercion.
    
    This commit also makes better names for several of these functions,
    and removes one that went unused.


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

91cc88b3d2dbbd64c63d6359bd32cf3ba3f546ab
 compiler/types/Coercion.lhs    |  152 ++++++++++++++++++++++++++--------------
 compiler/types/OptCoercion.lhs |    2 +-
 2 files changed, 100 insertions(+), 54 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 91cc88b3d2dbbd64c63d6359bd32cf3ba3f546ab