diff options
Diffstat (limited to 'compiler/basicTypes/OccName.hs')
| -rw-r--r-- | compiler/basicTypes/OccName.hs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler/basicTypes/OccName.hs b/compiler/basicTypes/OccName.hs index 3032c0ccd8..c4c5db4767 100644 --- a/compiler/basicTypes/OccName.hs +++ b/compiler/basicTypes/OccName.hs @@ -858,10 +858,15 @@ avoidClashesOccEnv env occs = go env emptyUFM occs tidyOccName :: TidyOccEnv -> OccName -> (TidyOccEnv, OccName) tidyOccName env occ@(OccName occ_sp fs) +{- | not (fs `elemUFM` env) && (fs /= fsLit "_") -- See Note [Always number wildcard types when tidying] = (addToUFM env fs 1, occ) -- Desired OccName is free +-} + | isUnderscoreFS fs + = (env, occ) + | otherwise = case lookupUFM env base1 of Nothing -> (addToUFM env base1 2, OccName occ_sp base1) |