PUBLIC
Hi,
I'm looking for ways to map Core fragments back to source locations.
I see there is an annotated version of Core in `GHC/Core.hs` called `AnnExpr`,
which I could see being useful for this if I set the annotation type to
`SrcSpan`, but that's not what I get out of GHC's desugarer, simplifier or
tidier.
If there's no built-in mechanism for this, my only idea would be to create a
HsExpr-to-HsExpr transformation that wraps every node in a call that is opaque
enough to be persisted through Core-to-Core transformations but still
transparent enough that it doesn't block optimization opportunities. Is that
even possible?
Alternatively, would it make it easer if I was content with only getting source
locations for variable occurrences?
Thanks,
Gergo
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