Make pprNameLoc more robust in absence of loc information

[ghc-hetmet.git] / compiler / basicTypes / Var.lhs

diff --git a/compiler/basicTypes/Var.lhs b/compiler/basicTypes/Var.lhs
index f2bef26..e66286e 100644 (file)
--- a/compiler/basicTypes/Var.lhs
+++ b/compiler/basicTypes/Var.lhs
@@ -9,7 +9,7 @@
 -- The above warning supression flag is a temporary kludge.
 -- While working on this module you are encouraged to remove it and fix
 -- any warnings in the module. See
---     http://hackage.haskell.org/trac/ghc/wiki/CodingStyle#Warnings
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
 -- for details
 
 module Var (
@@ -47,9 +47,7 @@ import {-# SOURCE #-} TypeRep( Type, Kind )
 import {-# SOURCE #-}  TcType( TcTyVarDetails, pprTcTyVarDetails )
 import {-# SOURCE #-}  IdInfo( GlobalIdDetails, notGlobalId, 
                                 IdInfo, seqIdInfo )
-#ifdef DEBUG
 import {-# SOURCE #-}  TypeRep( isCoercionKind )
-#endif
 
 import Name hiding (varName)
 import Unique
@@ -233,10 +231,11 @@ setCoVarName   = setVarName
 
 mkCoVar :: Name -> Kind -> CoVar
 mkCoVar name kind = ASSERT( isCoercionKind kind )
-                   TyVar { varName    = name
-                         , realUnique = getKey# (nameUnique name)
-                         , varType  = kind
-                          , isCoercionVar    = True
+                   TyVar { varName       = name
+                         , realUnique    = getKey# (nameUnique name)
+                         , varType       = kind        
+                               -- varType is always PredTy (EqPred t1 t2)
+                          , isCoercionVar = True
                        }
 
 mkWildCoVar :: Kind -> TyVar