Add restrictVarEnv :: VarEnv a -> VarSet -> VarEnv a
authorsimonpj@microsoft.com <unknown>
Fri, 23 Oct 2009 16:17:35 +0000 (16:17 +0000)
committersimonpj@microsoft.com <unknown>
Fri, 23 Oct 2009 16:17:35 +0000 (16:17 +0000)
I needed it, and then didn't need it, so it's not currently
called, but its generally useful kind of thing.


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