Add Note [Role twiddling functions] to Coercion.
authorRichard Eisenberg <eir@cis.upenn.edu>
Tue, 29 Apr 2014 15:55:56 +0000 (11:55 -0400)
committerRichard Eisenberg <eir@cis.upenn.edu>
Tue, 29 Apr 2014 15:57:02 +0000 (11:57 -0400)
commit91cc88b3d2dbbd64c63d6359bd32cf3ba3f546ab
tree072611a1cc51f5aae54873be1ddd2a36f9ff8371
parent7400810e3fb0af85da0cfb2b940bfe563687863f
Add Note [Role twiddling functions] to Coercion.

This commit also makes better names for several of these functions,
and removes one that went unused.
compiler/types/Coercion.lhs
compiler/types/OptCoercion.lhs