#2600: Bind type variables in RULES
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Reporter: simonpj | Owner: simonpj
Type: feature request | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.8.3
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Architecture: Unknown
Os: Unknown |
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Comment (by simonpj):
One other syntactic question: what if there are multiple type binders? We
could say
{{{
forall (type a :: *) (type b :: *) (f :: a->b). <blah>
}}}
or perhaps just one `type` keyword to introduce all type binders? But
then you'd need something to say when the type binders stopped. A
semicolon perhaps?
{{{
forall type (a :: *) (b :: *); (f :: a->b). <blah>
}}}
More syntactic suggestions welcome. Once we have the syntax, the
implementation should not be hard.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2600#comment:2>
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