[Hat] using hmake with hat

[Malcolm Wallace]

Hal Daume III <hdaume@ISI.EDU> writes:

> when I use hat, hmake seems to look in the wrong place for the generated files:
> 
>   hat-trans  ../Util/STM.hs
>   Wrote ../Util/TSTM.hs
>   ghc  [...]  ../TUtil/STM.hs
>   ghc-5.02.3: file `../TUtil/STM.hs' does not exist
> 
> so it seems hat is creating ../Util/TSTM.hs, but hmake prepends the "T"
> to"Util" instead of "STM".

Yes, this is an hmake bug, specifically in how it handles the -hat flag
in the presence of multiple source directories.  I think it is not
particularly related to the hierarchical namespace however.

> This seems to be a hat problem; even though it creates Util/TSTM.hs, the
> name of the generated module is "TUtil.STM".

hat-trans does have a couple of small problems with hierarchical namespaces.
As you notice, it has named the module wrongly.  You will also find that
some variables are named wrongly (syntactically incorrect) within the module.

> Any suggestions on what to do about this?  I can't imagine people
> haven't hit this wall before...

The standard caveat applies - Hat 2.00 is designed for pure Haskell'98,
with almost no extensions.  However, we do certainly plan to support
hierarchical namespaces in the near future, because they are now
supported by all Haskell implementations.  Some ghc extensions are
also likely to supported soon.  Watch this space.

Regards,
    Malcolm