[project @ 2003-10-09 11:58:39 by simonpj]

[ghc-hetmet.git] / ghc / compiler / typecheck / TcRules.lhs

diff --git a/ghc/compiler/typecheck/TcRules.lhs b/ghc/compiler/typecheck/TcRules.lhs
index 0367f69..27072a2 100644 (file)
--- a/ghc/compiler/typecheck/TcRules.lhs
+++ b/ghc/compiler/typecheck/TcRules.lhs
@@ -9,17 +9,15 @@ module TcRules ( tcRules ) where
 #include "HsVersions.h"
 
 import HsSyn           ( RuleDecl(..), RuleBndr(..), collectRuleBndrSigTys )
-import CoreSyn         ( CoreRule(..) )
 import RnHsSyn         ( RenamedRuleDecl )
 import TcHsSyn         ( TypecheckedRuleDecl, mkHsLet )
 import TcRnMonad
 import TcSimplify      ( tcSimplifyToDicts, tcSimplifyInferCheck )
 import TcMType         ( newTyVarTy )
 import TcType          ( tyVarsOfTypes, openTypeKind )
-import TcIfaceSig      ( tcCoreExpr, tcCoreLamBndrs )
-import TcMonoType      ( tcHsSigType, UserTypeCtxt(..), tcAddScopedTyVars )
+import TcHsType                ( tcHsSigType, UserTypeCtxt(..), tcAddScopedTyVars )
 import TcExpr          ( tcCheckRho )
-import TcEnv           ( tcExtendLocalValEnv, tcLookupGlobalId, tcLookupId )
+import TcEnv           ( tcExtendLocalValEnv )
 import Inst            ( instToId )
 import Id              ( idType, mkLocalId )
 import Outputable
@@ -30,30 +28,12 @@ tcRules :: [RenamedRuleDecl] -> TcM [TypecheckedRuleDecl]
 tcRules decls = mappM tcRule decls
 
 tcRule :: RenamedRuleDecl -> TcM TypecheckedRuleDecl
-tcRule (IfaceRule name act vars fun args rhs src_loc)
-  = addSrcLoc src_loc          $
-    addErrCtxt (ruleCtxt name) $
-    tcLookupGlobalId fun               `thenM` \ fun' ->
-    tcCoreLamBndrs vars                        $ \ vars' ->
-    mappM tcCoreExpr args              `thenM` \ args' ->
-    tcCoreExpr rhs                     `thenM` \ rhs' ->
-    returnM (IfaceRuleOut fun' (Rule name act vars' args' rhs'))
-
-tcRule (IfaceRuleOut fun rule) -- Built-in rules, and only built-in rules, 
-                               -- come this way.  Usually IfaceRuleOut is only
-                               -- used for the *output* of the type checker
-  = tcLookupId fun             `thenM` \ fun' ->
-       -- NB: tcLookupId, not tcLookupGlobalId
-       -- Reason: when compiling GHC.Base, where eqString is defined,
-       --         we'll get the builtin rule for eqString, but eqString
-       --         will be in the *local* type environment.
-       -- Seems like a bit of a hack
-    returnM (IfaceRuleOut fun' rule)   
-
 tcRule (HsRule name act vars lhs rhs src_loc)
   = addSrcLoc src_loc                          $
     addErrCtxt (ruleCtxt name)                 $
-    newTyVarTy openTypeKind                            `thenM` \ rule_ty ->
+    traceTc (ptext SLIT("---- Rule ------")
+                <+> ppr name)                  `thenM_` 
+    newTyVarTy openTypeKind                    `thenM` \ rule_ty ->
 
        -- Deal with the tyvars mentioned in signatures
     tcAddScopedTyVars (collectRuleBndrSigTys vars) (