Tweak the alternative layout rule: {} contains commas

[ghc-hetmet.git] / compiler / parser / Lexer.x

diff --git a/compiler/parser/Lexer.x b/compiler/parser/Lexer.x
index 43ddf7c..c6457a4 100644 (file)
--- a/compiler/parser/Lexer.x
+++ b/compiler/parser/Lexer.x
@@ -2002,9 +2002,9 @@ alternativeLayoutRuleToken t
                     return (L thisLoc ITocurly)
               | otherwise ->
                  do setAlrExpectingOCurly Nothing
-                    setPendingImplicitTokens [L thisLoc ITccurly]
+                    setPendingImplicitTokens [L lastLoc ITccurly]
                     setNextToken t
-                    return (L thisLoc ITocurly)
+                    return (L lastLoc ITocurly)
              (_, _, Just expectingOCurly) ->
                  do setAlrExpectingOCurly Nothing
                     setALRContext (ALRLayout expectingOCurly thisCol : context)
@@ -2100,6 +2100,10 @@ isNonDecreasingIntentation _           = False
 containsCommas :: Token -> Bool
 containsCommas IToparen = True
 containsCommas ITobrack = True
+-- John doesn't have {} as containing commas, but records contain them,
+-- which caused a problem parsing Cabal's Distribution.Simple.InstallDirs
+-- (defaultInstallDirs).
+containsCommas ITocurly = True
 -- GHC Extensions:
 containsCommas IToubxparen = True
 containsCommas _        = False