Re: [GHC] #10576: REPL returns list of all imported names when operator completion requested

27 Jun 2015

      #10576: REPL returns list of all imported names when operator completion requested
-------------------------------------+-------------------------------------
        Reporter:  Geraldus          |                   Owner:  thomie
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  GHCi              |                 Version:  7.8.4
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |  completions complete command
 Type of failure:  Incorrect result  |  operator
  at runtime                         |            Architecture:
      Blocked By:                    |  Unknown/Multiple
 Related Tickets:  #9996             |               Test Case:
                                     |                Blocking:
                                     |  Differential Revisions:
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Description changed by Geraldus:

Old description:
...
When querying completions for operators GHCi returns a list containing
all imported names rather than suitable completions.
For example, if you simply start GHCi and run `:complete repl ">>"`
command it will give you all names from base and Prelude.  Then if you
import something else, for example `:m +Data.Text`, the result of query
will contain names from Data.Text also.
In case of projects (`cabal repl`) things are worst, because returned
list contains all names imported project-wise and it could be really
huge.
GHCi behaves similarly with following queries:
:complete repl "(>>"
:complete repl "Prelude.>>"
:complete repl "Prelude.(>>"
I only tested this on OS X 10.9, GHC 7.8.4
New description:

 When querying completions for operators GHCi returns a list containing all
 imported names rather than suitable completions.

 For example, if you simply start GHCi and run `:complete repl ">>"`
 command it will give you all names from base and Prelude.  Then if you
 import something else, for example `:m +Data.Text`, the result of query
 will contain names from Data.Text also.

 In case of projects (`cabal repl`) things are worst, because returned list
 contains all names imported project-wise and it could be really huge.

 GHCi behaves similarly with following queries:
 {{{
 :complete repl "(>>"
 :complete repl "Prelude.>>"
 :complete repl "Prelude.(>>"
 }}}

 I only tested this on OS X 10.9, GHC 7.8.4

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10576#comment:5
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