[project @ 1997-03-14 07:52:06 by simonpj]

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

diff --git a/ghc/compiler/typecheck/TcClassDcl.lhs b/ghc/compiler/typecheck/TcClassDcl.lhs
index da8ea95..c28bce1 100644 (file)
--- a/ghc/compiler/typecheck/TcClassDcl.lhs
+++ b/ghc/compiler/typecheck/TcClassDcl.lhs
@@ -14,7 +14,7 @@ import HsSyn          ( HsDecl(..), ClassDecl(..), HsBinds(..), Bind(..), MonoBinds(..),
                          Match(..), GRHSsAndBinds(..), GRHS(..), HsExpr(..), 
                          DefaultDecl, TyDecl, InstDecl, IfaceSig, Fixity,
                          HsLit(..), OutPat(..), Sig(..), HsType(..), HsTyVar,
-                         Stmt, Qualifier, ArithSeqInfo, InPat, Fake )
+                         Stmt, DoOrListComp, ArithSeqInfo, InPat, Fake )
 import HsTypes         ( getTyVarName )
 import HsPragmas       ( ClassPragmas(..) )
 import RnHsSyn         ( RenamedClassDecl(..), RenamedClassPragmas(..),
@@ -25,7 +25,8 @@ import TcHsSyn                ( TcIdOcc(..), SYN_IE(TcHsBinds), SYN_IE(TcMonoBinds), SYN_IE(Tc
                          mkHsTyApp, mkHsTyLam, mkHsDictApp, mkHsDictLam, tcIdType )
 
 import Inst            ( Inst, InstOrigin(..), SYN_IE(LIE), emptyLIE, plusLIE, newDicts, newMethod )
-import TcEnv           ( tcLookupClass, tcLookupTyVar, tcLookupTyCon, newLocalIds, tcExtendGlobalTyVars )
+import TcEnv           ( tcLookupClass, tcLookupTyVar, tcLookupTyCon, newLocalIds, tcAddImportedIdInfo,
+                         tcExtendGlobalTyVars )
 import TcInstDcls      ( processInstBinds )
 import TcKind          ( unifyKind, TcKind )
 import TcMonad
@@ -204,9 +205,9 @@ tcClassSig :: Class                 -- Knot tying only!
                     Id)                -- default-method ids
 
 tcClassSig rec_clas rec_clas_tyvar rec_classop_spec_fn
-          (ClassOpSig op_name
+          (ClassOpSig op_name dm_name
                       op_ty
-                      pragmas src_loc)
+                      src_loc)
   = tcAddSrcLoc src_loc $
     fixTc ( \ ~(_, rec_sel_id, rec_defm_id) -> -- Knot for pragmas
 
@@ -227,13 +228,13 @@ tcClassSig rec_clas rec_clas_tyvar rec_classop_spec_fn
     in
 
        -- Build the selector id and default method id
-    tcGetUnique                                        `thenNF_Tc` \ d_uniq ->
     let
-       sel_id  = mkMethodSelId     op_name        rec_clas class_op       global_ty
-       defm_id = mkDefaultMethodId op_name d_uniq rec_clas class_op False global_ty
+       sel_id  = mkMethodSelId     op_name rec_clas class_op       global_ty
+       defm_id = mkDefaultMethodId dm_name rec_clas class_op False global_ty
                        -- ToDo: improve the "False"
     in
-    returnTc (class_op, sel_id, defm_id)
+    tcAddImportedIdInfo defm_id                        `thenNF_Tc` \ final_defm_id ->
+    returnTc (class_op, sel_id, final_defm_id)
     )
 \end{code}
 
@@ -431,6 +432,72 @@ buildDefaultMethodBinds clas clas_tyvar
     origin = ClassDeclOrigin
 \end{code}
 
+====================
+buildDefaultMethodBinds
+       :: Class
+       -> TcTyVar s
+       -> [Id]
+       -> RenamedMonoBinds
+       -> TcM s (LIE s, TcHsBinds s)
+
+buildDefaultMethodBinds clas clas_tyvar
+                       default_method_ids default_binds
+  = newDicts origin [(clas,inst_ty)]                   `thenNF_Tc` \ (this_dict, [this_dict_id]) ->
+    tcExtendGlobalTyVars clas_tyvar_set (
+       tcDefaultMethodBinds default_binds
+    )
+
+tcDefaultMethodBinds default_meth_ids default_binds
+  where
+    go (AndMonoBinds b1 b2)
+      = go b1          `thenTc` \ (new_b1, lie1) ->
+        go b2          `thenTc` \ (new_b2, lie2) ->
+       returnTc (new_b1 `ThenBinds` new_b2, lie1 `plusLIE` lie2)
+
+    go EmptyMonoBinds = EmptyBinds
+
+    go mbind = processInstBinds1 clas clas_dict meth_ids mbind `thenTc` \ (tags
+
+tcDefaultMethodBinds EmptyMonoBinds
+  
+
+
+       processInstBinds
+          clas
+          (makeClassDeclDefaultMethodRhs clas local_defm_ids)
+          avail_insts
+          local_defm_ids
+          default_binds
+    )                                  `thenTc` \ (insts_needed, default_binds') ->
+
+    let
+    mapAndUnzipNF_Tc mk_method default_method_ids      `thenNF_Tc` \ (insts_s, local_defm_ids) ->
+    let
+       avail_insts    = this_dict `plusLIE` unionManyBags insts_s      -- Insts available
+       clas_tyvar_set = unitTyVarSet clas_tyvar
+    in
+
+    tcSimplifyAndCheck
+       clas_tyvar_set
+       avail_insts
+       insts_needed                    `thenTc` \ (const_lie, dict_binds) ->
+       
+
+    let
+       defm_binds = AbsBinds
+                       [clas_tyvar]
+                       [this_dict_id]
+                       (local_defm_ids `zip` map RealId default_method_ids)
+                       dict_binds
+                       (RecBind default_binds')
+    in
+    returnTc (const_lie, defm_binds)
+  where
+    inst_ty = mkTyVarTy clas_tyvar
+    mk_method defm_id = newMethod origin (RealId defm_id) [inst_ty]
+    origin = ClassDeclOrigin
+==================
+
 @makeClassDeclDefaultMethodRhs@ builds the default method for a
 class declaration when no explicit default method is given.
 
@@ -466,5 +533,5 @@ Contexts
 ~~~~~~~~
 \begin{code}
 classDeclCtxt class_name sty
-  = ppCat [ppStr "In the class declaration for", ppr sty class_name]
+  = ppCat [ppPStr SLIT("In the class declaration for"), ppr sty class_name]
 \end{code}