[project @ 2002-09-13 15:02:25 by simonpj]

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

diff --git a/ghc/compiler/basicTypes/BasicTypes.lhs b/ghc/compiler/basicTypes/BasicTypes.lhs
index 62a68a9..1f74e7f 100644 (file)
--- a/ghc/compiler/basicTypes/BasicTypes.lhs
+++ b/ghc/compiler/basicTypes/BasicTypes.lhs
@@ -20,7 +20,7 @@ module BasicTypes(
 
        Unused, unused,
 
-       Fixity(..), FixityDirection(..),
+       FixitySig(..), Fixity(..), FixityDirection(..),
        defaultFixity, maxPrecedence, 
        arrowFixity, negateFixity, negatePrecedence,
        compareFixity,
@@ -46,12 +46,15 @@ module BasicTypes(
        StrictnessMark(..), isMarkedUnboxed, isMarkedStrict,
 
        CompilerPhase, 
-       Activation(..), isActive, isNeverActive, isAlwaysActive
+       Activation(..), isActive, isNeverActive, isAlwaysActive,
+
+       SuccessFlag(..), succeeded, failed, successIf
    ) where
 
 #include "HsVersions.h"
 
 import Outputable
+import SrcLoc
 \end{code}
 
 %************************************************************************
@@ -137,21 +140,34 @@ mapIPName f (Linear  n) = Linear  (f n)
 %************************************************************************
 
 \begin{code}
+------------------------
+data FixitySig name = FixitySig name Fixity SrcLoc 
+
+instance Eq name => Eq (FixitySig name) where
+   (FixitySig n1 f1 _) == (FixitySig n2 f2 _) = n1==n2 && f1==f2
+
+instance Outputable name => Outputable (FixitySig name) where
+  ppr (FixitySig name fixity loc) = sep [ppr fixity, ppr name]
+
+------------------------
 data Fixity = Fixity Int FixityDirection
-data FixityDirection = InfixL | InfixR | InfixN 
-                    deriving(Eq)
 
 instance Outputable Fixity where
     ppr (Fixity prec dir) = hcat [ppr dir, space, int prec]
 
+instance Eq Fixity where               -- Used to determine if two fixities conflict
+  (Fixity p1 dir1) == (Fixity p2 dir2) = p1==p2 && dir1 == dir2
+
+------------------------
+data FixityDirection = InfixL | InfixR | InfixN 
+                    deriving(Eq)
+
 instance Outputable FixityDirection where
     ppr InfixL = ptext SLIT("infixl")
     ppr InfixR = ptext SLIT("infixr")
     ppr InfixN = ptext SLIT("infix")
 
-instance Eq Fixity where               -- Used to determine if two fixities conflict
-  (Fixity p1 dir1) == (Fixity p2 dir2) = p1==p2 && dir1 == dir2
-
+------------------------
 maxPrecedence = (9::Int)
 defaultFixity = Fixity maxPrecedence InfixL
 
@@ -407,6 +423,28 @@ instance Outputable StrictnessMark where
 
 %************************************************************************
 %*                                                                     *
+\subsection{Success flag}
+%*                                                                     *
+%************************************************************************
+
+\begin{code}
+data SuccessFlag = Succeeded | Failed
+
+successIf :: Bool -> SuccessFlag
+successIf True  = Succeeded
+successIf False = Failed
+
+succeeded, failed :: SuccessFlag -> Bool
+succeeded Succeeded = True
+succeeded Failed    = False
+
+failed Succeeded = False
+failed Failed    = True
+\end{code}
+
+
+%************************************************************************
+%*                                                                     *
 \subsection{Activation}
 %*                                                                     *
 %************************************************************************
@@ -443,3 +481,4 @@ isNeverActive act     = False
 isAlwaysActive AlwaysActive = True
 isAlwaysActive other       = False
 \end{code}
+