Don't import FastString in HsVersions.h

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

diff --git a/compiler/basicTypes/BasicTypes.lhs b/compiler/basicTypes/BasicTypes.lhs
index c43280f..d60321a 100644 (file)
--- a/compiler/basicTypes/BasicTypes.lhs
+++ b/compiler/basicTypes/BasicTypes.lhs
@@ -1,4 +1,5 @@
 %
+% (c) The University of Glasgow 2006
 % (c) The GRASP/AQUA Project, Glasgow University, 1997-1998
 %
 \section[BasicTypes]{Miscellanous types}
@@ -57,7 +58,7 @@ module BasicTypes(
 
 #include "HsVersions.h"
 
-import FastString( FastString )
+import FastString
 import Outputable
 \end{code}
 
@@ -150,7 +151,9 @@ instance Outputable FixityDirection where
     ppr InfixN = ptext SLIT("infix")
 
 ------------------------
-maxPrecedence = (9::Int)
+maxPrecedence :: Int
+maxPrecedence = 9
+defaultFixity :: Fixity
 defaultFixity = Fixity maxPrecedence InfixL
 
 negateFixity, funTyFixity :: Fixity
@@ -235,7 +238,7 @@ isBoxed Unboxed = False
 %*                                                                     *
 %************************************************************************
 
-\begin{code} 
+\begin{code}
 data RecFlag = Recursive 
             | NonRecursive
             deriving( Eq )
@@ -377,10 +380,8 @@ data OccInfo
 
   | IAmALoopBreaker    -- Used by the occurrence analyser to mark loop-breakers
                        -- in a group of recursive definitions
-       !RulesOnly      -- True <=> This loop breaker mentions the other binders
-                       --          in its recursive group only in its RULES, not
-                       --          in its rhs
-                       --  See OccurAnal Note [RulesOnly]
+       !RulesOnly      -- True <=> This is a weak or rules-only loop breaker
+                       --  See OccurAnal Note [Weak loop breakers]
 
 type RulesOnly = Bool
 \end{code}
@@ -389,7 +390,7 @@ type RulesOnly = Bool
 \begin{code}
 isNoOcc :: OccInfo -> Bool
 isNoOcc NoOccInfo = True
-isNoOcc other     = False
+isNoOcc _         = False
 
 seqOccInfo :: OccInfo -> ()
 seqOccInfo occ = occ `seq` ()
@@ -403,33 +404,36 @@ type InterestingCxt = Bool        -- True <=> Function: is applied
 type InsideLam = Bool  -- True <=> Occurs inside a non-linear lambda
                        -- Substituting a redex for this occurrence is
                        -- dangerous because it might duplicate work.
+insideLam, notInsideLam :: InsideLam
 insideLam    = True
 notInsideLam = False
 
 -----------------
 type OneBranch = Bool  -- True <=> Occurs in only one case branch
                        --      so no code-duplication issue to worry about
+oneBranch, notOneBranch :: OneBranch
 oneBranch    = True
 notOneBranch = False
 
 isLoopBreaker :: OccInfo -> Bool
 isLoopBreaker (IAmALoopBreaker _) = True
-isLoopBreaker other              = False
+isLoopBreaker _                   = False
 
 isNonRuleLoopBreaker :: OccInfo -> Bool
-isNonRuleLoopBreaker (IAmALoopBreaker False) = True    -- Loop-breaker that breaks a non-rule cycle
-isNonRuleLoopBreaker other                  = False
+isNonRuleLoopBreaker (IAmALoopBreaker False) = True   -- Loop-breaker that breaks a non-rule cycle
+isNonRuleLoopBreaker _                       = False
 
 isDeadOcc :: OccInfo -> Bool
 isDeadOcc IAmDead = True
-isDeadOcc other          = False
+isDeadOcc _       = False
 
+isOneOcc :: OccInfo -> Bool
 isOneOcc (OneOcc _ _ _) = True
-isOneOcc other         = False
+isOneOcc _              = False
 
 isFragileOcc :: OccInfo -> Bool
 isFragileOcc (OneOcc _ _ _) = True
-isFragileOcc other         = False
+isFragileOcc _              = False
 \end{code}
 
 \begin{code}
@@ -468,11 +472,13 @@ data StrictnessMark       -- Used in interface decls only
    | NotMarkedStrict   
    deriving( Eq )
 
+isMarkedUnboxed :: StrictnessMark -> Bool
 isMarkedUnboxed MarkedUnboxed = True
-isMarkedUnboxed other        = False
+isMarkedUnboxed _             = False
 
+isMarkedStrict :: StrictnessMark -> Bool
 isMarkedStrict NotMarkedStrict = False
-isMarkedStrict other          = True   -- All others are strict
+isMarkedStrict _               = True   -- All others are strict
 
 instance Outputable StrictnessMark where
   ppr MarkedStrict     = ptext SLIT("!")
@@ -490,6 +496,10 @@ instance Outputable StrictnessMark where
 \begin{code}
 data SuccessFlag = Succeeded | Failed
 
+instance Outputable SuccessFlag where
+    ppr Succeeded = ptext SLIT("Succeeded")
+    ppr Failed    = ptext SLIT("Failed")
+
 successIf :: Bool -> SuccessFlag
 successIf True  = Succeeded
 successIf False = Failed
@@ -529,31 +539,40 @@ data InlineSpec
                        --          is enabled, it will definitely actually happen
   deriving( Eq )
 
+defaultInlineSpec, alwaysInlineSpec, neverInlineSpec :: InlineSpec
+
 defaultInlineSpec = Inline AlwaysActive False  -- Inlining is OK, but not forced
 alwaysInlineSpec  = Inline AlwaysActive True   -- INLINE always
 neverInlineSpec   = Inline NeverActive  False  -- NOINLINE 
 
 instance Outputable Activation where
-   ppr AlwaysActive     = empty                -- The default
+   ppr NeverActive      = ptext SLIT("NEVER")
+   ppr AlwaysActive     = ptext SLIT("ALWAYS")
    ppr (ActiveBefore n) = brackets (char '~' <> int n)
    ppr (ActiveAfter n)  = brackets (int n)
-   ppr NeverActive      = ptext SLIT("NEVER")
     
 instance Outputable InlineSpec where
-   ppr (Inline act True)  = ptext SLIT("INLINE") <> ppr act
-   ppr (Inline act False) = ptext SLIT("NOINLINE") <> ppr act
+   ppr (Inline act is_inline)  
+       | is_inline = ptext SLIT("INLINE")
+                     <> case act of
+                           AlwaysActive -> empty
+                           _            -> ppr act
+       | otherwise = ptext SLIT("NOINLINE")
+                     <> case act of
+                           NeverActive  -> empty
+                           _            -> ppr act
 
 isActive :: CompilerPhase -> Activation -> Bool
-isActive p NeverActive      = False
-isActive p AlwaysActive     = True
+isActive _ NeverActive      = False
+isActive _ AlwaysActive     = True
 isActive p (ActiveAfter n)  = p <= n
 isActive p (ActiveBefore n) = p >  n
 
 isNeverActive, isAlwaysActive :: Activation -> Bool
 isNeverActive NeverActive = True
-isNeverActive act        = False
+isNeverActive _           = False
 
 isAlwaysActive AlwaysActive = True
-isAlwaysActive other       = False
+isAlwaysActive _            = False
 \end{code}