allow rank-1 polymorphic types for globals

[coq-hetmet.git] / src / HaskWeakToStrong.v

diff --git a/src/HaskWeakToStrong.v b/src/HaskWeakToStrong.v
index b2521e3..b9ac068 100644 (file)
--- a/src/HaskWeakToStrong.v
+++ b/src/HaskWeakToStrong.v
@@ -19,9 +19,6 @@ Require Import HaskStrongTypes.
 Require Import HaskStrong.
 Require Import HaskCoreVars.
 
-(* can remove *)
-Require Import HaskStrongToWeak.
-
 Open Scope string_scope.
 Definition TyVarResolver Γ   := forall wt:WeakTypeVar, ???(HaskTyVar Γ wt).
 Definition CoVarResolver Γ Δ := forall wt:WeakCoerVar, ???(HaskCoVar Γ Δ).
@@ -179,7 +176,7 @@ Definition weakTypeToType : forall {Γ:TypeEnv}(φ:TyVarResolver Γ)(t:WeakType)
     apply OK.
     eapply haskTypeOfSomeKind.
     unfold HaskType; intros.
-    apply TyFunApp.
+    apply (TyFunApp tc (fst (tyFunKind tc)) (snd (tyFunKind tc))).
     apply lt'.
     apply X.
 
@@ -513,7 +510,22 @@ Fixpoint doesWeakVarOccurAlts (wev:WeakExprVar)
     | T_Branch b1 b2                                           => doesWeakVarOccurAlts wev b1 || doesWeakVarOccurAlts wev b2
   end.
 
-(*Definition ensureCaseBindersAreNotUsed (we:WeakExpr) : UniqM WeakExpr := FIXME *)
+Definition checkDistinct :
+  forall {V}(EQ:EqDecidable V)(lv:list V), ???(distinct lv).
+  intros.
+  set (distinct_decidable lv) as q.
+  destruct q.
+  exact (OK d).
+  exact (Error "checkDistinct failed").
+  Defined.
+
+(* FIXME: check the kind of the type of the weakexprvar to support >0 *)
+Definition mkGlobal Γ (τ:HaskType Γ ★) (wev:WeakExprVar) : Global Γ.
+  refine {| glob_kinds := nil |}.
+  apply wev.
+  intros.
+  apply τ.
+  Defined.
 
 Definition weakExprToStrongExpr : forall
     (Γ:TypeEnv)
@@ -540,7 +552,7 @@ Definition weakExprToStrongExpr : forall
     match we with
 
     | WEVar   v                         => if ig v
-                                              then OK (EGlobal Γ Δ ξ (τ@@lev) v)
+                                              then OK ((EGlobal Γ Δ ξ (mkGlobal Γ τ v) INil lev) : Expr Γ Δ ξ (τ@@lev))
                                               else castExpr we ("WEVar "+++toString (v:CoreVar)) (τ @@ lev) (EVar Γ Δ ξ v)
 
     | WELit   lit                       => castExpr we ("WELit "+++toString lit) (τ @@ lev) (ELit Γ Δ ξ lit lev)
@@ -647,8 +659,9 @@ Definition weakExprToStrongExpr : forall
                 OK (ELR_branch Γ Δ ξ' lev _ _ b1' b2')
         end) rb
       in binds >>= fun binds' =>
+         checkDistinct CoreVarEqDecidable (map (@fst _ _) (leaves (varsTypes rb φ))) >>= fun rb_distinct =>
            weakExprToStrongExpr Γ Δ φ ψ ξ' ig' τ lev e >>= fun e' =>       
-             OK (ELetRec Γ Δ ξ lev τ _ binds' e')
+             OK (ELetRec Γ Δ ξ lev τ _ _ binds' e')
 
     | WECase vscrut escrut tbranches tc avars alts =>
         weakTypeOfWeakExpr escrut >>= fun tscrut =>
@@ -703,6 +716,8 @@ Definition weakExprToStrongExpr : forall
         destruct (ξ c).
         simpl.
       apply e1.
+      rewrite mapleaves.
+      apply rb_distinct.
 
     destruct case_pf.
       set (distinct_decidable (vec2list exprvars')) as dec.