| Error (?) with relative paths
| Version: March 1999
| OS Linux 2.0.35 (Suse5.3)
|
| Diagnosis:
| importing modules have to be higher in file hierarchy
| than imported modules
|
| ...
I think you're just running into one of the limitations of the
import chasing mechanism. A relevant quote from the Hugs user
manual is:
"You should also be aware that Hugs uses the names of files in
deciding whether a particular import has already been loaded, so
you should avoid situations where a single file is referred to
by more than one name. For example, you should not assume that
Hugs will be able to determine whether Demo.hs and ./Demo.hs are
references to the same file. "
In the first of your examples, it turns out that each file is
accessed by only one name. In the second, however, A gets accessed
by two different names, which confuses the import chasing mechanism.
Perhaps there is a way to make import chasing smart enough to avoid
this. But, for now, I'm afraid this is one of the rare situations
where you need to switch import chasing off (-i) and either load the
files manually or use a project file.
All the best,
Mark
