#1792: -ddump-minimal-imports breaks qualified imports (import...as)
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Reporter: guest | Owner:
Type: bug | Status: new
Priority: low | Milestone: 6.10 branch
Component: Compiler | Version: 6.6.1
Severity: minor | Resolution:
Keywords: | Difficulty: Unknown
Os: Unknown | Testcase:
Architecture: Unknown |
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Changes (by simonpj):
* priority: normal => low
* milestone: => 6.10 branch
Old description:
> When using the -ddump-minimal-imports option on a Haskell file, it breaks
> qualified imports.
>
> Ie, suppose one has a line in a file thus:
>
> import qualified Data.ByteString as B (putStr, readFile)
>
> Using -ddump-minimal-imports will give you something like this:
> import Data.ByteString(B.putStr, B.readFile)
>
> There are 3 things wrong here:
>
> #putStr and readFile should not be renamed thus, as obviously
> Data.ByteString has nothing under those names
>
> #Data.ByteString is no longer being imported under a different name, so
> all function uses relying on B.putStr etc. will break
>
> #Finally, it's just ugly to have no spaces between the last letter of the
> module's name and the opening parenthesis.
>
> I see this behavior under GHC 6.6.1, and asl of #haskell tells me he
> duplicated the import problem using GHCi version 6.8.0.20071019.
>
> --
> gwern
New description:
When using the `-ddump-minimal-imports` option on a Haskell file, it
breaks qualified imports.
Ie, suppose one has a line in a file thus:
{{{
import qualified Data.ByteString as B (putStr, readFile)
}}}
Using `-ddump-minimal-imports` will give you something like this:
{{{
import Data.ByteString(B.putStr, B.readFile)
}}}
There are 3 things wrong here:
* `putStr` and `readFile` should not be renamed thus, as obviously
`Data.ByteString` has nothing under those names
* `Data.ByteString` is no longer being imported under a different name,
so all function uses relying on `B.putStr` etc. will break
* Finally, it's just ugly to have no spaces between the last letter of
the module's name and the opening parenthesis.
I see this behavior under GHC 6.6.1, and asl of #haskell tells me he
duplicated the import problem using GHCi version 6.8.0.20071019.
--
gwern
Comment:
Good point. This is one of those fiddly things, and few people use it. So
I'm going to put it as low priority, currently provisionally in the 6.10
queue.
Others: pls yell and add yourselves to the cc list if you use `-ddump-
minimal-imports`.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1792#comment:2>
GHC <http://www.haskell.org/ghc/>
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