ghc/buildpath-abi-stability-2.p...

88 lines
3.1 KiB
Diff

Description: Don't include BufPos in interface files
Author: Matthew Pickering
Origin: https://gitlab.haskell.org/ghc/ghc/-/merge_requests/8972
Bug: https://gitlab.haskell.org/ghc/ghc/-/issues/22162
Index: b/compiler/GHC/Iface/Ext/Types.hs
===================================================================
--- a/compiler/GHC/Iface/Ext/Types.hs
+++ b/compiler/GHC/Iface/Ext/Types.hs
@@ -746,5 +746,5 @@ toHieName name
| isKnownKeyName name = KnownKeyName (nameUnique name)
| isExternalName name = ExternalName (nameModule name)
(nameOccName name)
- (nameSrcSpan name)
- | otherwise = LocalName (nameOccName name) (nameSrcSpan name)
+ (removeBufSpan $ nameSrcSpan name)
+ | otherwise = LocalName (nameOccName name) (removeBufSpan $ nameSrcSpan name)
Index: b/compiler/GHC/Types/SrcLoc.hs
===================================================================
--- a/compiler/GHC/Types/SrcLoc.hs
+++ b/compiler/GHC/Types/SrcLoc.hs
@@ -72,6 +72,7 @@ module GHC.Types.SrcLoc (
getBufPos,
BufSpan(..),
getBufSpan,
+ removeBufSpan,
-- * Located
Located,
@@ -397,6 +398,10 @@ data UnhelpfulSpanReason
| UnhelpfulOther !FastString
deriving (Eq, Show)
+removeBufSpan :: SrcSpan -> SrcSpan
+removeBufSpan (RealSrcSpan s _) = RealSrcSpan s Nothing
+removeBufSpan s = s
+
{- Note [Why Maybe BufPos]
~~~~~~~~~~~~~~~~~~~~~~~~~~
In SrcLoc we store (Maybe BufPos); in SrcSpan we store (Maybe BufSpan).
Index: b/compiler/GHC/Utils/Binary.hs
===================================================================
--- a/compiler/GHC/Utils/Binary.hs
+++ b/compiler/GHC/Utils/Binary.hs
@@ -1444,19 +1444,6 @@ instance Binary RealSrcSpan where
return (mkRealSrcSpan (mkRealSrcLoc f sl sc)
(mkRealSrcLoc f el ec))
-instance Binary BufPos where
- put_ bh (BufPos i) = put_ bh i
- get bh = BufPos <$> get bh
-
-instance Binary BufSpan where
- put_ bh (BufSpan start end) = do
- put_ bh start
- put_ bh end
- get bh = do
- start <- get bh
- end <- get bh
- return (BufSpan start end)
-
instance Binary UnhelpfulSpanReason where
put_ bh r = case r of
UnhelpfulNoLocationInfo -> putByte bh 0
@@ -1475,10 +1462,11 @@ instance Binary UnhelpfulSpanReason wher
_ -> UnhelpfulOther <$> get bh
instance Binary SrcSpan where
- put_ bh (RealSrcSpan ss sb) = do
+ put_ bh (RealSrcSpan ss _sb) = do
putByte bh 0
+ -- BufSpan doesn't ever get serialised because the positions depend
+ -- on build location.
put_ bh ss
- put_ bh sb
put_ bh (UnhelpfulSpan s) = do
putByte bh 1
@@ -1488,8 +1476,7 @@ instance Binary SrcSpan where
h <- getByte bh
case h of
0 -> do ss <- get bh
- sb <- get bh
- return (RealSrcSpan ss sb)
+ return (RealSrcSpan ss Nothing)
_ -> do s <- get bh
return (UnhelpfulSpan s)