[GHC] #3464: Find import declaration importing a certain function

[GHC]

#3464: Find import declaration importing a certain function
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Reporter:  fasta             |          Owner:                  
    Type:  feature request   |         Status:  new             
Priority:  normal            |      Component:  GHCi            
 Version:  6.10.4            |       Severity:  normal          
Keywords:                    |       Testcase:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
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 Given the command

 {{{:find foo}}}

 , find all import declaration that import this symbol.

 Example:

 > *ModA *ModB *ModC are loaded.

 Suppose the modules all export Data.List.

 So,
 given

 module ModX(module Data.List) where import Data.List
 with X \in {A,B,C}

 Now, when one currently does :i for a function in Data.List, one gets back
 that it is defined in Data.List, but that's not the information the user
 is interested in. The user wants to know which _modules_ define a certain
 symbol, so in this case it should say that modules ModA, ModB and ModC
 brought that symbol into scope.

 The user-interface could also simply be :i as it is now, but with one
 extra line saying where it was imported.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3464>
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