X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2FHaskCoreToWeak.v;h=1cbaf228293a9bb6c296ce7efc69523ecf3a2292;hb=273645efdb974dd04042e6c59bbedbe0ad658298;hp=c7fb0e93270951939ce2cc84eea098722cb6d605;hpb=703bff3b209bd7d114b49cb736da8af167a4ec71;p=coq-hetmet.git diff --git a/src/HaskCoreToWeak.v b/src/HaskCoreToWeak.v index c7fb0e9..1cbaf22 100644 --- a/src/HaskCoreToWeak.v +++ b/src/HaskCoreToWeak.v @@ -6,43 +6,106 @@ Generalizable All Variables. Require Import Preamble. Require Import General. Require Import Coq.Lists.List. -Require Import HaskGeneral. -Require Import HaskLiterals. +Require Import HaskKinds. +Require Import HaskCoreLiterals. Require Import HaskCoreVars. Require Import HaskCoreTypes. Require Import HaskCore. Require Import HaskWeakVars. +Require Import HaskWeakTypes. Require Import HaskWeak. -Variable coreVarToWeakVar : CoreVar -> WeakVar. Extract Inlined Constant coreVarToWeakVar => "coreVarToWeakVar". +Axiom tycons_distinct : ~(ArrowTyCon=ModalBoxTyCon). +Variable tyConOrTyFun : CoreTyCon -> sum TyCon TyFun. Extract Inlined Constant tyConOrTyFun => "tyConOrTyFun". + +Fixpoint coreTypeToWeakType' (ct:CoreType) : ???WeakType := + match ct with + | TyVarTy cv => match coreVarToWeakVar cv with + | WExprVar _ => Error "encountered expression variable in a type" + | WTypeVar tv => OK (WTyVarTy tv) + | WCoerVar _ => Error "encountered coercion variable in a type" + end + + | AppTy t1 t2 => coreTypeToWeakType' t2 >>= fun t2' => coreTypeToWeakType' t1 >>= fun t1' => OK (WAppTy t1' t2') + + | TyConApp tc_ lct => + let recurse := ((fix rec tl := match tl with + | nil => OK nil + | a::b => coreTypeToWeakType' a >>= fun a' => rec b >>= fun b' => OK (a'::b') + end) lct) + in match tyConOrTyFun tc_ with + | inr tf => recurse >>= fun recurse' => OK (WTyFunApp tf recurse') + | inl tc => if eqd_dec tc ModalBoxTyCon + then match lct with + | ((TyVarTy ec)::tbody::nil) => + match coreVarToWeakVar ec with + | WTypeVar ec' => coreTypeToWeakType' tbody >>= fun tbody' => OK (WCodeTy ec' tbody') + | WExprVar _ => Error "encountered expression variable in a modal box type" + | WCoerVar _ => Error "encountered coercion variable in a modal box type" + end + | _ => Error ("mis-applied modal box tycon: " +++ ct) + end + else let tc' := if eqd_dec tc ArrowTyCon + then WFunTyCon + else WTyCon tc + in recurse >>= fun recurse' => OK (fold_left (fun x y => WAppTy x y) recurse' tc') + end + | FunTy (PredTy (EqPred t1 t2)) t3 => coreTypeToWeakType' t1 >>= fun t1' => + coreTypeToWeakType' t2 >>= fun t2' => + coreTypeToWeakType' t3 >>= fun t3' => + OK (WCoFunTy t1' t2' t3') + | FunTy t1 t2 => coreTypeToWeakType' t1 >>= fun t1' => + coreTypeToWeakType' t2 >>= fun t2' => + OK (WAppTy (WAppTy WFunTyCon t1') t2') + | ForAllTy cv t => match coreVarToWeakVar cv with + | WExprVar _ => Error "encountered expression variable in a type" + | WTypeVar tv => coreTypeToWeakType' t >>= fun t' => OK (WForAllTy tv t') + | WCoerVar _ => Error "encountered coercion variable in a type" + end + | PredTy (ClassP cl lct) => ((fix rec tl := match tl with + | nil => OK nil + | a::b => coreTypeToWeakType' a >>= fun a' => + rec b >>= fun b' => OK (a'::b') + end) lct) >>= fun lct' => OK (WClassP cl lct') + | PredTy (IParam ipn ct) => coreTypeToWeakType' ct >>= fun ct' => OK (WIParam ipn ct') + | PredTy (EqPred _ _) => Error "hit a bare EqPred" + end. + +Variable coreViewDeep : CoreType -> CoreType. Extract Inlined Constant coreViewDeep => "coreViewDeep". +Definition coreTypeToWeakType t := coreTypeToWeakType' (coreViewDeep t). (* detects our crude Core-encoding of modal type introduction/elimination forms *) -Definition isBrak (ce:@CoreExpr CoreVar) : ??(WeakTypeVar * CoreType) := +Definition isBrak (ce:@CoreExpr CoreVar) : ??(CoreVar * WeakTypeVar * CoreType) := match ce with | (CoreEApp (CoreEApp (CoreEVar v) (CoreEType (TyVarTy ec))) (CoreEType tbody)) => if coreName_eq hetmet_brak_name (coreVarCoreName v) then - match coreVarToWeakVar v with + match coreVarToWeakVar ec with | WExprVar _ => None - | WTypeVar tv => Some (tv,tbody) + | WTypeVar tv => Some (v,tv,tbody) | WCoerVar _ => None end else None | _ => None end. -Definition isEsc (ce:@CoreExpr CoreVar) : ??(WeakTypeVar * CoreType) := +Definition isEsc (ce:@CoreExpr CoreVar) : ??(CoreVar * WeakTypeVar * CoreType) := match ce with | (CoreEApp (CoreEApp (CoreEVar v) (CoreEType (TyVarTy ec))) (CoreEType tbody)) => if coreName_eq hetmet_esc_name (coreVarCoreName v) then - match coreVarToWeakVar v with + match coreVarToWeakVar ec with | WExprVar _ => None - | WTypeVar tv => Some (tv,tbody) + | WTypeVar tv => Some (v,tv,tbody) | WCoerVar _ => None end else None | _ => None end. -Definition coreCoercionToWeakCoercion (cc:CoreCoercion) : WeakCoercion := +Variable coreCoercionToWeakCoercion : CoreCoercion -> WeakCoercion. + Extract Inlined Constant coreCoercionToWeakCoercion => "coreCoercionToWeakCoercion". +(* let (t1,t2) := coreCoercionKind cc - in weakCoercion t1 t2 cc. + in coreTypeToWeakType t1 >>= fun t1' => + coreTypeToWeakType t2 >>= fun t2' => + OK (WCoUnsafe t1' t2'). +*) Fixpoint coreExprToWeakExpr (ce:@CoreExpr CoreVar) : ???WeakExpr := match ce with @@ -50,7 +113,7 @@ Fixpoint coreExprToWeakExpr (ce:@CoreExpr CoreVar) : ???WeakExpr := | CoreENote n e => coreExprToWeakExpr e >>= fun e' => OK (WENote n e') | CoreEType t => Error "encountered CoreEType in a position where an Expr should have been" | CoreECast e co => coreExprToWeakExpr e >>= fun e' => - OK (WECast e' (coreCoercionToWeakCoercion co)) + OK (WECast e' (coreCoercionToWeakCoercion co)) | CoreEVar v => match coreVarToWeakVar v with | WExprVar ev => OK (WEVar ev) @@ -59,12 +122,20 @@ Fixpoint coreExprToWeakExpr (ce:@CoreExpr CoreVar) : ???WeakExpr := end | CoreEApp e1 e2 => match isBrak e1 with - | Some (tv,t) => coreExprToWeakExpr e2 >>= fun e' => OK (WEBrak tv e' t) + | Some (v,tv,t) => + coreExprToWeakExpr e2 >>= fun e' => + coreTypeToWeakType t >>= fun t' => + OK (WEBrak v tv e' t') | None => match isEsc e1 with - | Some (tv,t) => coreExprToWeakExpr e2 >>= fun e' => OK (WEEsc tv e' t) + | Some (v,tv,t) => + coreExprToWeakExpr e2 >>= fun e' => + coreTypeToWeakType t >>= fun t' => + OK (WEEsc v tv e' t') | None => coreExprToWeakExpr e1 >>= fun e1' => match e2 with - | CoreEType t => OK (WETyApp e1' t) + | CoreEType t => + coreTypeToWeakType t >>= fun t' => + OK (WETyApp e1' t') | _ => coreExprToWeakExpr e2 >>= fun e2' => OK (WEApp e1' e2') end end @@ -105,29 +176,36 @@ Fixpoint coreExprToWeakExpr (ce:@CoreExpr CoreVar) : ???WeakExpr := | WTypeVar _ => Error "found a type variable in a case" | WCoerVar _ => Error "found a coercion variable in a case" | WExprVar ev => - coreExprToWeakExpr e - >>= fun e' => coreTypeOfWeakExpr e' >>= fun te' => - match te' with - | TyConApp _ tc lt => + coreTypeToWeakType (coreTypeOfCoreExpr e) >>= fun te' => + coreExprToWeakExpr e >>= fun e' => + (match isTyConApp te' nil with None => Error "expectTyConApp encountered strange type" | Some x => OK x end) + >>= fun tca => + let (tc,lt) := tca in ((fix mkBranches (branches: list (@triple AltCon (list CoreVar) (@CoreExpr CoreVar))) - : ???(list (AltCon*list WeakVar*WeakExpr)) := + : ???(list (AltCon*list WeakTypeVar*list WeakCoerVar*list WeakExprVar*WeakExpr)) := match branches with | nil => OK nil | (mkTriple alt vars e)::rest => mkBranches rest >>= fun rest' => coreExprToWeakExpr e >>= fun e' => match alt with - | DEFAULT => OK ((DEFAULT,nil,e')::rest') - | LitAlt lit => OK ((LitAlt lit,nil,e')::rest') - | DataAlt _ _ _ _ tc' dc => OK (((DataAlt _ dc),(map coreVarToWeakVar vars),e')::rest') + | DEFAULT => OK ((DEFAULT,nil,nil,nil,e')::rest') + | LitAlt lit => OK ((LitAlt lit,nil,nil,nil,e')::rest') + | DataAlt dc => let vars := map coreVarToWeakVar vars in + OK (((DataAlt dc), + (General.filter (map (fun x => match x with WTypeVar v => Some v | _ => None end) vars)), + (General.filter (map (fun x => match x with WCoerVar v => Some v | _ => None end) vars)), + (General.filter (map (fun x => match x with WExprVar v => Some v | _ => None end) vars)), + e')::rest') end end) alts) - >>= fun branches => coreExprToWeakExpr e - >>= fun scrutinee => - list2vecOrError lt _ >>= fun lt' => - OK (WELet ev scrutinee (WECase (WEVar ev) tbranches tc lt' (unleaves branches))) - | _ => Error "found a case whose scrutinee's type wasn't a TyConApp" - end + >>= fun branches => + coreExprToWeakExpr e >>= fun scrutinee => + coreTypeToWeakType tbranches >>= fun tbranches' => + OK (WECase ev scrutinee tbranches' tc lt (unleaves branches)) end end. + + +