> The release notes for ghc 5.02.1 say:
>
> 1.4.4. New experimental features
>
> Partial support for hierarchical module names.
>
> - but I could not find a document describing how to use this feature.
>
> Is it possible to use hierarchical module names with ghc at
> present, and if so,
> how does one write and use a hierarchically-named module ?
Module names may include the '.' character with -fglsagow-exts on.
Searching for interfaces to include is extended as follows: if our
search path contains directories D1...Dn, then a module A.B.C is
searched for in D1/A/B/C.hi ... Dn/A/B/C.hi. You must give the full
module name in the header, eg.
module A.B.C where
This support *is* experimental though, so it is subject to change. Also
note that certain parts of the hierarchy are reserved for
system-supplied libraries - see the current proposal at
http://www.haskell.org/~simonmar/libraries/libraries.html
Cheers,
Simon
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