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| author | Simon Peyton Jones <simonpj@microsoft.com> | 2021-03-04 18:05:14 +0000 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-03-09 18:52:32 -0500 |
| commit | 8fe274e27b9bd42c68e931da875d3f8e9c20e53f (patch) | |
| tree | 4776c24d11989f8563346820cddd9014f7d3c1e3 /compiler/GHC/Rename | |
| parent | aaa5fc21af8dda26bf6c497d1036833225c94fa1 (diff) | |
| download | haskell-8fe274e27b9bd42c68e931da875d3f8e9c20e53f.tar.gz | |
Fixes to dealing with the export of main
It's surprisingly tricky to deal with 'main' (#19397). This
patch does quite bit of refactoring do to it right. Well,
more-right anyway!
The moving parts are documented in GHC.Tc.Module
Note [Dealing with main]
Some other oddments:
* Rename tcRnExports to rnExports; no typechecking here!
* rnExports now uses checkNoErrs rather than failIfErrsM;
the former fails only if rnExports itself finds errors
* Small improvements to tcTyThingCategory, which ultimately
weren't important to the patch, but I've retained as
a minor improvement.
Diffstat (limited to 'compiler/GHC/Rename')
| -rw-r--r-- | compiler/GHC/Rename/Env.hs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/GHC/Rename/Env.hs b/compiler/GHC/Rename/Env.hs index b1a8ce0351..483c6145b8 100644 --- a/compiler/GHC/Rename/Env.hs +++ b/compiler/GHC/Rename/Env.hs @@ -690,7 +690,7 @@ lookupSubBndrOcc_helper must_have_parent warn_if_deprec parent rdr_name -- `checkPatSynParent`. traceRn "parent" (ppr parent) traceRn "lookupExportChild original_gres:" (ppr original_gres) - traceRn "lookupExportChild picked_gres:" (ppr $ picked_gres original_gres) + traceRn "lookupExportChild picked_gres:" (ppr (picked_gres original_gres) $$ ppr must_have_parent) case picked_gres original_gres of NoOccurrence -> noMatchingParentErr original_gres @@ -720,6 +720,7 @@ lookupSubBndrOcc_helper must_have_parent warn_if_deprec parent rdr_name -- constructors, neither of which is the parent. noMatchingParentErr :: [GlobalRdrElt] -> RnM ChildLookupResult noMatchingParentErr original_gres = do + traceRn "npe" (ppr original_gres) dup_fields_ok <- xoptM LangExt.DuplicateRecordFields case original_gres of [] -> return NameNotFound |