- | TyFunApp tfc tls => WTyFunApp tfc (rawHaskTypeListToWeakType f tls)
-end
-with rawHaskTypeListToWeakType (f:Fresh Kind (fun _ => WeakTypeVar)){κ}(rht:RawHaskTypeList κ) :=
-match rht with
- | TyFunApp_nil => nil
- | TyFunApp_cons κ kl rht' rhtl' => (rawHaskTypeToWeakType f rht')::(rawHaskTypeListToWeakType f rhtl')
-end.
-
-Definition typeToWeakType (f:Fresh Kind (fun _ => WeakTypeVar))
- {Γ}{κ}(τ:HaskType Γ κ)(φ:InstantiatedTypeEnv (fun _ => WeakTypeVar) Γ) : WeakType :=
- rawHaskTypeToWeakType f (τ _ φ).
-
-Variable unsafeCoerce : WeakCoercion. Extract Inlined Constant unsafeCoerce => "Coercion.unsafeCoerce".
-
-Definition strongCoercionToWeakCoercion {Γ}{Δ}{ck}(τ:HaskCoercion Γ Δ ck)(φ:InstantiatedTypeEnv (fun _ => WeakTypeVar) Γ)
- : WeakCoercion := unsafeCoerce.
-
-(* This can be used to turn HaskStrong's with arbitrary expression variables into HaskStrong's which use WeakExprVar's
- * for their variables; those can subsequently be passed to the following function (strongExprToWeakExpr) *)
-(*
-Definition reindexStrongExpr {VV}{HH}{eqVV:EqDecidable VV}{eqHH:EqDecidable HH}
- {Γ}{Δ}{ξ}{lev}(exp:@Expr VV eqVV Γ Δ ξ lev) : { ξ' : HH -> LeveledHaskType Γ & @Expr HH eqHH Γ Δ ξ' lev }.
- Defined.
- *)
-
-Definition updateITE {Γ:TypeEnv}{TV:Kind->Type}{κ}(tv:TV κ)(ite:InstantiatedTypeEnv TV Γ) : InstantiatedTypeEnv TV (κ::Γ)
- := tv::::ite.
-
-Section strongExprToWeakExpr.
-
- Context (hetmet_brak : CoreVar).
- Context (hetmet_esc : CoreVar).
-Axiom FIXME : forall {t}, t.
-
-Fixpoint strongExprToWeakExpr {Γ}{Δ}{ξ}{τ}
- (ftv:Fresh Kind (fun _ => WeakTypeVar))
- (fcv:Fresh (WeakType*WeakType) (fun _ => WeakCoerVar))
- (exp:@Expr _ CoreVarEqDecidable Γ Δ ξ τ)
- : InstantiatedTypeEnv (fun _ => WeakTypeVar) Γ -> WeakExpr :=
-match exp as E in @Expr _ _ G D X L return InstantiatedTypeEnv (fun _ => WeakTypeVar) G -> WeakExpr with
-| EVar Γ' _ ξ' ev => fun ite => WEVar (weakExprVar ev (@typeToWeakType ftv Γ' ★ (unlev (ξ' ev)) ite))
-| ELit _ _ _ lit _ => fun ite => WELit lit
-| EApp Γ' _ _ _ _ _ e1 e2 => fun ite => WEApp (strongExprToWeakExpr ftv fcv e1 ite) (strongExprToWeakExpr ftv fcv e2 ite)
-| ELam Γ' _ _ _ t _ cv e => fun ite => WELam (weakExprVar cv (typeToWeakType ftv t ite)) (strongExprToWeakExpr ftv fcv e ite)
-| ELet Γ' _ _ t _ _ ev e1 e2 => fun ite => WELet (weakExprVar ev (typeToWeakType ftv t ite)) (strongExprToWeakExpr ftv fcv e1 ite) (strongExprToWeakExpr ftv fcv e2 ite)
-| EEsc Γ' _ _ ec t _ e => fun ite => WEEsc hetmet_esc (ec _ ite) (strongExprToWeakExpr ftv fcv e ite) (typeToWeakType ftv t ite)
-| EBrak Γ' _ _ ec t _ e => fun ite => WEBrak hetmet_brak (ec _ ite) (strongExprToWeakExpr ftv fcv e ite) (typeToWeakType ftv t ite)
-| ECast Γ Δ ξ t1 t2 γ l e => fun ite => WECast (strongExprToWeakExpr ftv fcv e ite) (strongCoercionToWeakCoercion γ ite)
-| ENote _ _ _ _ n e => fun ite => WENote n (strongExprToWeakExpr ftv fcv e ite)
-| ETyApp Γ Δ κ σ τ ξ l e => fun ite => WETyApp (strongExprToWeakExpr ftv fcv e ite) (typeToWeakType ftv τ ite)
-| ELetRec _ _ _ _ _ vars elrb e =>fun ite=>WELetRec (exprLetRec2WeakExprLetRec ftv fcv elrb ite)(strongExprToWeakExpr ftv fcv e ite)
-| ECoApp Γ Δ κ σ₁ σ₂ γ σ ξ l e => fun ite => WECoApp (strongExprToWeakExpr ftv fcv e ite) (strongCoercionToWeakCoercion γ ite)
-| ECase Γ Δ ξ l tc tbranches atypes e alts =>
- fun ite => WECase
- (strongExprToWeakExpr ftv fcv e ite)
- (@typeToWeakType ftv Γ _ tbranches ite)
- tc
- (ilist_to_list (@ilmap _ _ (fun _ => WeakType) _ (fun _ t => typeToWeakType ftv t ite) atypes))
- ((fix caseBranches
- (tree:Tree ??{ scb : StrongCaseBranchWithVVs _ _ tc atypes
- & Expr (sac_Γ scb Γ)
- (sac_Δ scb Γ atypes (weakCK'' Δ))
- (update_ξ (weakLT'○ξ) (vec2list (vec_map
- (fun x => ((fst x),(snd x @@ weakL' l))) (scbwv_varstypes scb))))
- (weakLT' (tbranches@@l)) })
- : Tree ??(AltCon * list WeakTypeVar * list WeakCoerVar * list WeakExprVar * WeakExpr) :=
- match tree with
- | T_Leaf None => []
- | T_Leaf (Some x) => let (scb,e) := x in
- let (ftv',evarsite') := mfresh ftv _ ite in
- let fcv' := fcv in
- let (evars,ite') := evarsite' in
- [(sac_altcon scb,
- vec2list evars,
- nil (*FIXME*),
- map (fun vt => weakExprVar (fst vt) (typeToWeakType ftv' (snd vt) ite')) (vec2list (scbwv_varstypes scb)),
- strongExprToWeakExpr ftv' fcv' e ite'
- )]
- | T_Branch b1 b2 => (caseBranches b1),,(caseBranches b2)
- end
- ) alts)
-| ETyLam _ _ _ k _ _ e => fun ite =>
- let (tv,ftv') := next _ _ ftv k in WETyLam tv (strongExprToWeakExpr ftv' fcv e (updateITE tv ite))
-| ECoLam Γ Δ κ σ σ₁ σ₂ ξ l e => fun ite =>
- let t1' := typeToWeakType ftv σ₁ ite in
- let t2' := typeToWeakType ftv σ₂ ite in
- let (cv,fcv') := next _ _ fcv (t1',t2') in WECoLam cv (strongExprToWeakExpr ftv fcv' e ite)
-end
-with exprLetRec2WeakExprLetRec {Γ}{Δ}{ξ}{τ}{vars}
- (ftv:Fresh Kind (fun _ => WeakTypeVar))
- (fcv:Fresh (WeakType*WeakType) (fun _ => WeakCoerVar))
- (elrb:@ELetRecBindings _ CoreVarEqDecidable Γ Δ ξ τ vars)
- : InstantiatedTypeEnv (fun _ => WeakTypeVar) Γ -> Tree ??(WeakExprVar * WeakExpr) :=
-match elrb as E in ELetRecBindings G D X L V
- return InstantiatedTypeEnv (fun _ => WeakTypeVar) G -> Tree ??(WeakExprVar * WeakExpr) with
-| ELR_nil _ _ _ _ => fun ite => []
-| ELR_leaf _ _ ξ' cv v e => fun ite => [((weakExprVar v (typeToWeakType ftv (unlev (ξ' v)) ite)),(strongExprToWeakExpr ftv fcv e ite))]
-| ELR_branch _ _ _ _ _ _ b1 b2 => fun ite => (exprLetRec2WeakExprLetRec ftv fcv b1 ite),, (exprLetRec2WeakExprLetRec ftv fcv b2 ite)
-end.
-End strongExprToWeakExpr.
\ No newline at end of file
+ with exprLetRec2WeakExprLetRec {Γ}{Δ}{ξ}{τ}(χ:VV->???WeakExprVar){vars}(elrb:@ELetRecBindings _ eqVV Γ Δ ξ τ vars)
+ : InstantiatedTypeEnv (fun _ => WeakTypeVar) Γ -> UniqM (Tree ??(WeakExprVar * WeakExpr)) :=
+ match elrb as E in ELetRecBindings G D X L V
+ return InstantiatedTypeEnv (fun _ => WeakTypeVar) G -> UniqM (Tree ??(WeakExprVar * WeakExpr)) with
+ | ELR_nil _ _ _ _ => fun ite => return []
+ | ELR_leaf _ _ ξ' cv v e => fun ite => bind t' = typeToWeakType (unlev (ξ' v)) ite
+ ; bind e' = exprToWeakExpr χ e ite
+ ; bind v' = match χ v with Error s => failM s | OK y => return y end
+ ; return [(v',e')]
+ | ELR_branch _ _ _ _ _ _ b1 b2 => fun ite => bind b1' = exprLetRec2WeakExprLetRec χ b1 ite
+ ; bind b2' = exprLetRec2WeakExprLetRec χ b2 ite
+ ; return b1',,b2'
+ end.
+
+
+ Fixpoint strongExprToWeakExpr (us:UniqSupply){Γ}{Δ}{ξ}{τ}(exp:@Expr _ eqVV Γ Δ ξ τ)
+ (ite:InstantiatedTypeEnv (fun _ => WeakTypeVar) Γ)
+ : ???WeakExpr :=
+ match exprToWeakExpr (fun v => Error ("unbound variable " +++ v)) exp ite with
+ uniqM f => f us >>= fun x => OK (snd x)
+ end.
+
+End HaskStrongToWeak.
\ No newline at end of file