diff options
Diffstat (limited to 'compiler/GHC/Utils/Trace.hs')
| -rw-r--r-- | compiler/GHC/Utils/Trace.hs | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/compiler/GHC/Utils/Trace.hs b/compiler/GHC/Utils/Trace.hs index c5f07df248..112d2f9ba5 100644 --- a/compiler/GHC/Utils/Trace.hs +++ b/compiler/GHC/Utils/Trace.hs @@ -13,7 +13,18 @@ module GHC.Utils.Trace ) where -import GHC.Prelude +{- Note [Exporting pprTrace from GHC.Prelude] +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +For our own sanity we want to export pprTrace from GHC.Prelude. +Since calls to traces should never be performance sensitive it's okay for these +to be source imports/exports. However we still need to make sure that all +transitive imports from Trace.hs-boot do not import GHC.Prelude. + +To get there we import the basic GHC.Prelude.Basic prelude instead of GHC.Prelude +within the transitive dependencies of Trace.hs +-} + +import GHC.Prelude.Basic import GHC.Utils.Outputable import GHC.Utils.Exception import GHC.Utils.Panic |