[ ghc-Bugs-1167383 ] GHCi reports too few instances

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Mon Mar 21 04:01:12 EST 2005


Bugs item #1167383, was opened at 2005-03-21 09:01
Message generated for change (Tracker Item Submitted) made by Item Submitter
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Category: GHCi
Group: None
Status: Open
Resolution: None
Priority: 4
Submitted By: Simon Peyton Jones (simonpj)
Assigned to: Nobody/Anonymous (nobody)
Summary: GHCi reports too few instances

Initial Comment:
GHCi aspires to report all instances that can be written 
unqualified in the current scope; but it doesn't.


| ~% ghci
|    ___         ___ _
|   / _ \ /\  /\/ __(_)
|  / /_\// /_/ / /  | |      GHC Interactive, version 6.4, for 
Haskell 98.
| / /_\/ __  / /___| |      http://www.haskell.org/ghc/
| \____/\/ /_/\____/|_|      Type :? for help.
| 
| Loading package base-1.0 ... linking ... done.
| 
| Prelude> :i Bool
| data Bool = False | True 	-- <wired into compiler>
| instance Eq Bool 	-- Imported from GHC.Base
| instance Ord Bool 	-- Imported from GHC.Base
| 
| Prelude> :i Bool
| data Bool = False | True 	-- <wired into compiler>
| instance Bounded Bool 	-- Imported from 
GHC.Enum
| instance Enum Bool 	-- Imported from 
GHC.Enum
| instance Eq Bool 	-- Imported from GHC.Base
| instance Ord Bool 	-- Imported from GHC.Base
| instance Read Bool 	-- Imported from GHC.Read
| instance Show Bool 	-- Imported from GHC.Show


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