X-Git-Url: http://git.megacz.com/?p=coq-hetmet.git;a=blobdiff_plain;f=src%2FHaskCoreToWeak.v;h=d269cd10dd1c70be83cfdef3c4d6554b718df20f;hp=3555a8a6d473c07650142f10b60e6138084700c0;hb=bcb16a7fa1ff772f12807c4587609fd756b7762e;hpb=8282f5a7639dbe862bba29d3170d58b81bbb1446 diff --git a/src/HaskCoreToWeak.v b/src/HaskCoreToWeak.v index 3555a8a..d269cd1 100644 --- a/src/HaskCoreToWeak.v +++ b/src/HaskCoreToWeak.v @@ -6,16 +6,75 @@ 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. +(* this distinguishes SystemFC "type functions" (true) which are always fully applied from "type constructors" which aren't *) +Variable isFamilyTyCon : TyCon -> bool. Extract Inlined Constant isFamilyTyCon => "TyCon.isFamilyTyCon". + + +Axiom tycons_distinct : ~(ArrowTyCon=ModalBoxTyCon). + Variable coreVarToWeakVar : CoreVar -> WeakVar. Extract Inlined Constant coreVarToWeakVar => "coreVarToWeakVar". +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 if (isFamilyTyCon tc) + then recurse >>= fun recurse' => OK (WTyFunApp tc recurse') + else 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" + 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') + | 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. + (* detects our crude Core-encoding of modal type introduction/elimination forms *) Definition isBrak (ce:@CoreExpr CoreVar) : ??(WeakTypeVar * CoreType) := match ce with @@ -40,9 +99,11 @@ match ce with | _ => None end. -Definition coreCoercionToWeakCoercion (cc:CoreCoercion) : WeakCoercion := +Definition coreCoercionToWeakCoercion (cc:CoreCoercion) : ???WeakCoercion := let (t1,t2) := coreCoercionKind cc - in weakCoercion t1 t2 cc. + in coreTypeToWeakType t1 >>= fun t1' => + coreTypeToWeakType t2 >>= fun t2' => + OK (weakCoercion t1' t2' cc). Fixpoint coreExprToWeakExpr (ce:@CoreExpr CoreVar) : ???WeakExpr := match ce with @@ -50,7 +111,8 @@ 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)) + coreCoercionToWeakCoercion co >>= fun co' => + OK (WECast e' co') | CoreEVar v => match coreVarToWeakVar v with | WExprVar ev => OK (WEVar ev) @@ -59,12 +121,20 @@ 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 (tv,t) => + coreExprToWeakExpr e2 >>= fun e' => + coreTypeToWeakType t >>= fun t' => + OK (WEBrak tv e' t') | None => match isEsc e1 with - | Some (tv,t) => coreExprToWeakExpr e2 >>= fun e' => OK (WEEsc tv e' t) + | Some (tv,t) => + coreExprToWeakExpr e2 >>= fun e' => + coreTypeToWeakType t >>= fun t' => + OK (WEEsc 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 @@ -105,10 +175,11 @@ 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 => + coreExprToWeakExpr e >>= fun e' => + weakTypeOfWeakExpr e' >>= fun te' => + (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 WeakTypeVar*list WeakCoerVar*list WeakExprVar*WeakExpr)) := match branches with @@ -119,20 +190,18 @@ Fixpoint coreExprToWeakExpr (ce:@CoreExpr CoreVar) : ???WeakExpr := match alt with | DEFAULT => OK ((DEFAULT,nil,nil,nil,e')::rest') | LitAlt lit => OK ((LitAlt lit,nil,nil,nil,e')::rest') - | DataAlt _ _ _ _ tc' dc => let vars := map coreVarToWeakVar vars in - OK (((DataAlt _ dc), + | 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 (WELet ev scrutinee (WECase (WEVar ev) tbranches' tc lt (unleaves branches))) end end.