Add absentError.
authorsimonpj@microsoft.com <unknown>
Tue, 14 Sep 2010 13:46:39 +0000 (13:46 +0000)
committersimonpj@microsoft.com <unknown>
Tue, 14 Sep 2010 13:46:39 +0000 (13:46 +0000)
commitf5876f9fc3651f757556ca9c78ade3e253639b33
tree119a13e0df3e670312636d21f9cbfea22f2bd58e
parent4ecb4fe89491554ecc6aec0ac45d4df7372c64bf
Add absentError.

This patch accompanies the HEAD patch:

  Tue Sep 14 12:38:27 BST 2010  simonpj@microsoft.com
    * Make absent-arg wrappers work for unlifted types (fix Trac #4306)

    Previously we were simply passing arguments of unlifted
    type to a wrapper, even if they were absent, which was
    stupid.

    See Note [Absent error Id] in WwLib.
Control/Exception/Base.hs