[Haskell-cafe] Installing grapefruit: "lexical error at character 'i'"

Jeffrey Brown jeffbrown.the at gmail.com
Mon Jan 5 22:54:00 UTC 2015

I did not realize UIItem.hs and UIItem.hs-boot were separate things; I
thank Matthew Pickering for pointing out that potential error in a private

It looks like Alan or Kim was right: the 12th line of the boot file reads
"#if MIN_VERSION_base(4,7,0)", and the file contains no mention of CPP. I
am left with two questions:

How to enable CPP?
Do I just include the following liine at the top of the boot file?

How to replace the boot file?
In my hackage.haskell.org folder there are a lot of subfolders named after
Haskell libraries -- arrows, cairo, etc. Almost every one of those includes
in turn a single folder with a version number, and within that a .tar.gz
file. In order to find the error you all helped me locate, I uncompressed
the .tar.gz file in the grapefruit-ui folder. I could alter that object,
but that does not seem likely to help, because I would not be altering the
data that Haskell actually uses.

Thanks! This is exciting!

On Mon, Jan 5, 2015 at 2:22 PM, Jeffrey Brown <jeffbrown.the at gmail.com>

> Thanks guys!
> I found the library, though, as a .tar.gz file under
> /home/jeff/.cabal/packages/hackage.haskell.org/grapefruit-ui/, and
> when I uncompressed that, found the UIItem file.
> I can't find the offending character in it, though. Supposedly it was at
> position 12.2 (line 12, column 2, right?), but I only see whitespace there.
> The first few lines of it are these ("module" being the first word of the
> first line):
> module Internal.UIItem (
>     -- * User interface items in general
>     UIItem (UIItem),
>     item,
>     -- * Bricks
>     Brick,
>     brick,
>     just,
>     -- * Boxes
>     Box,
>     box,
>     with,
>     With (With),
> On Mon, Jan 5, 2015 at 2:00 PM, Brandon Allbery <allbery.b at gmail.com>
> wrote:
>> On Mon, Jan 5, 2015 at 4:56 PM, Jeffrey Brown <jeffbrown.the at gmail.com>
>> wrote:
>>> I wanted to find the offending 'i' character, but the file
>>> "src/Internal/UIItem.hs-boot" I was unable to find anywhere:
>> It won't be there, it was removed during cleanup from the failed install.
>> Use "cabal get grapefruit-ui" to get a more permanent copy of the source.
>> --
>> brandon s allbery kf8nh                               sine nomine
>> associates
>> allbery.b at gmail.com
>> ballbery at sinenomine.net
>> unix, openafs, kerberos, infrastructure, xmonad
>> http://sinenomine.net
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