expose minf_rdr_env

Motivation

The GlobalRdrEnv of a module is very useful for tooling authors, see https://gitlab.com/tseenshe/hsinspect/blob/503cd48faba5b308be29ed44a12f7d6b22105f2b/exe/Main.hs#L53-61 for a working example.

However, minf_rdr_env is not exposed (an oversight?) so users of the api must invoke a full typecheck phase on the full file (or manually parse just the import section).

Proposal

Adding and exporting the following from GHC.hs

   modInfoRdrEnv :: ModuleInfo -> Maybe GlobalRdrEnv
   modInfoRdrEnv = minf_rdr_env

Would it make sense to backport this for any upcoming 8.6 releases?

Edited Aug 06, 2019 by Sam Halliday

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