New syntax for stand-alone deriving. Implemented fully.

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

diff --git a/compiler/typecheck/TcRnDriver.lhs b/compiler/typecheck/TcRnDriver.lhs
index 875d4f6..fefb21a 100644 (file)
--- a/compiler/typecheck/TcRnDriver.lhs
+++ b/compiler/typecheck/TcRnDriver.lhs
@@ -380,7 +380,6 @@ tcRnSrcDecls decls
              TcGblEnv { tcg_type_env = type_env, tcg_binds = binds, 
                         tcg_rules = rules, tcg_fords = fords } = tcg_env } ;
 
-       tcDump tcg_env ;
        (bind_ids, binds', fords', rules') <- zonkTopDecls (binds `unionBags` inst_binds)
                                                           rules fords ;
 
@@ -474,7 +473,8 @@ tcRnHsBootDecls decls
 
                -- Typecheck instance decls
        ; traceTc (text "Tc3")
-       ; (tcg_env, inst_infos, _binds) <- tcInstDecls1 tycl_decls (hs_instds rn_group)
+       ; (tcg_env, inst_infos, _binds) 
+            <- tcInstDecls1 tycl_decls (hs_instds rn_group) (hs_derivds rn_group)
        ; setGblEnv tcg_env     $ do {
 
                -- Typecheck value declarations
@@ -630,6 +630,7 @@ tcTopSrcDecls :: ModDetails -> HsGroup Name -> TcM (TcGblEnv, TcLclEnv)
 tcTopSrcDecls boot_details
        (HsGroup { hs_tyclds = tycl_decls, 
                   hs_instds = inst_decls,
+                   hs_derivds = deriv_decls,
                   hs_fords  = foreign_decls,
                   hs_defds  = default_decls,
                   hs_ruleds = rule_decls,
@@ -650,7 +651,8 @@ tcTopSrcDecls boot_details
                -- Source-language instances, including derivings,
                -- and import the supporting declarations
         traceTc (text "Tc3") ;
-       (tcg_env, inst_infos, deriv_binds) <- tcInstDecls1 tycl_decls inst_decls ;
+       (tcg_env, inst_infos, deriv_binds) 
+            <- tcInstDecls1 tycl_decls inst_decls deriv_decls;
        setGblEnv tcg_env       $ do {
 
                -- Foreign import declarations next.  No zonking necessary
@@ -965,15 +967,20 @@ mkPlan stmt@(L loc (BindStmt {}))
   | [L _ v] <- collectLStmtBinders stmt                -- One binder, for a bind stmt 
   = do { let print_v  = L loc $ ExprStmt (nlHsApp (nlHsVar printName) (nlHsVar v))
                                           (HsVar thenIOName) placeHolderType
+
+       ; print_bind_result <- doptM Opt_PrintBindResult
+       ; let print_plan = do
+                 { stuff@([v_id], _) <- tcGhciStmts [stmt, print_v]
+                 ; v_ty <- zonkTcType (idType v_id)
+                 ; ifM (isUnitTy v_ty || not (isTauTy v_ty)) failM
+                 ; return stuff }
+
        -- The plans are:
        --      [stmt; print v]         but not if v::()
        --      [stmt]
-       ; runPlans [do { stuff@([v_id], _) <- tcGhciStmts [stmt, print_v]
-                      ; v_ty <- zonkTcType (idType v_id)
-                      ; ifM (isUnitTy v_ty || not (isTauTy v_ty)) failM
-                      ; return stuff },
-                   tcGhciStmts [stmt]
-         ]}
+       ; runPlans ((if print_bind_result then [print_plan] else []) ++
+                   [tcGhciStmts [stmt]])
+       }
 
 mkPlan stmt
   = tcGhciStmts [stmt]