[GHC] #14268: Implement Explicit Foralls Proposal

[GHC]

#14268: Implement Explicit Foralls Proposal
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        Reporter:  johnleo           |                Owner:  johnleo
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #13809            |  Differential Rev(s):
       Wiki Page:                    |
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Description changed by johnleo:

Old description:

> Implement Richard Eisenberg's Explicit Foralls proposal.
> https://github.com/ghc-proposals/ghc-proposals/pull/55
>
> For details see the proposal:
> https://github.com/goldfirere/ghc-proposals/blob/instance-
> forall/proposals/0000-instance-foralls.rst

New description:

 Implement Richard Eisenberg's Explicit Foralls proposal.
 https://github.com/ghc-proposals/ghc-proposals/pull/55

 For details see the proposal:
 https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0007
 -instance-foralls.rst

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14268#comment:4>
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