Reading source annotations during type checking

Wed Nov 23 13:57:52 UTC 2016

Dear GHC devs,
Is there a way to retrieve "source annotations" (as defined by
https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/extending_ghc.html#source-annotations)
during type checking. In particular, I am interested in reading them in
TcExpr and TcCanonical.

Regards,
Alejandro
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