Accessing 'Annotations' of modules in external packages
jhala at cs.ucsd.edu
Wed Apr 18 21:01:08 UTC 2018
I'm looking for some help using the GHC API to
access the 'Annotations' (created using the 'ANN'
mechanism) within modules of *external* packages
i.e. non-home modules.Currently I'm using
hscEPS :: HscEnv -> IO ExternalPackageState
and then using the field
eps_PIT :: !PackageIfaceTable
and from there, accessing the
mi_anns :: [IfaceAnnotation]
field of the
stored in the PackageIfaceTable but this ends in an unfortunate:
panic! (the 'impossible' happened)
(GHC version 8.2.2 for x86_64-apple-darwin):
No mi_anns in PIT
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Perhaps this is because, as the documentation for `mi_anns` says:
Annotations NOT STRICT! we read this field lazily from the interface file
but I am not sure how to proceed at this point? Do I need a _different_
HscEnv? Or perhaps I need to set up/initialize the HscEnv separately?
Any pointers would be most welcome!
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Glasgow-haskell-users