Require Import HaskStrong.
Require Import HaskProof.
-Axiom fail : forall {A}, string -> A.
- Extract Inlined Constant fail => "Prelude.error".
-
Section HaskStrongToProof.
-(* Whereas RLeft/RRight perform left and right context expansion on a single uniform rule, these functions perform
- * expansion on an entire uniform proof *)
-Definition ext_left {Γ}{Δ}(ctx:Tree ??(LeveledHaskType Γ ★))
- := @nd_map' _ _ _ _ (ext_tree_left ctx) (fun h c r => nd_rule (@RLeft Γ Δ h c ctx r)).
-Definition ext_right {Γ}{Δ}(ctx:Tree ??(LeveledHaskType Γ ★))
- := @nd_map' _ _ _ _ (ext_tree_right ctx) (fun h c r => nd_rule (@RRight Γ Δ h c ctx r)).
-
-Definition pivotContext {Γ}{Δ} a b c τ :
- @ND _ (@URule Γ Δ)
- [ Γ >> Δ > (a,,b),,c |- τ]
- [ Γ >> Δ > (a,,c),,b |- τ].
- set (ext_left a _ _ (nd_rule (@RExch Γ Δ τ c b))) as q.
- simpl in *.
- eapply nd_comp ; [ eapply nd_rule; apply RCossa | idtac ].
- eapply nd_comp ; [ idtac | eapply nd_rule; apply RAssoc ].
- apply q.
- Defined.
-
-Definition copyAndPivotContext {Γ}{Δ} a b c τ :
- @ND _ (@URule Γ Δ)
- [ Γ >> Δ > (a,,b),,(c,,b) |- τ]
- [ Γ >> Δ > (a,,c),,b |- τ].
- set (ext_left (a,,c) _ _ (nd_rule (@RCont Γ Δ τ b))) as q.
- simpl in *.
- eapply nd_comp; [ idtac | apply q ].
- clear q.
- eapply nd_comp ; [ idtac | eapply nd_rule; apply RCossa ].
- set (ext_right b _ _ (@pivotContext _ Δ a b c τ)) as q.
- simpl in *.
- eapply nd_comp ; [ idtac | apply q ].
- clear q.
- apply nd_rule.
- apply RAssoc.
- Defined.
-
+Definition pivotContext {T} a b c : @Arrange T ((a,,b),,c) ((a,,c),,b) :=
+ RComp (RComp (RCossa _ _ _) (RLeft a (RExch c b))) (RAssoc _ _ _).
+Definition copyAndPivotContext {T} a b c : @Arrange T ((a,,b),,(c,,b)) ((a,,c),,b).
+ eapply RComp; [ idtac | apply (RLeft (a,,c) (RCont b)) ].
+ eapply RComp; [ idtac | apply RCossa ].
+ eapply RComp; [ idtac | apply (RRight b (pivotContext a b c)) ].
+ apply RAssoc.
+ Defined.
Context {VV:Type}{eqd_vv:EqDecidable VV}.
- (* maintenance of Xi *)
- Definition dropVar (lv:list VV)(v:VV) : ??VV :=
- if fold_left
- (fun a b:bool => if a then true else if b then true else false)
- (map (fun lvv => if eqd_dec lvv v then true else false) lv)
- false
- then None
- else Some v.
+(* maintenance of Xi *)
+Fixpoint dropVar (lv:list VV)(v:VV) : ??VV :=
+ match lv with
+ | nil => Some v
+ | v'::lv' => if eqd_dec v v' then None else dropVar lv' v
+ end.
+
+Fixpoint mapOptionTree' {a b:Type}(f:a->??b)(t:@Tree ??a) : @Tree ??b :=
+ match t with
+ | T_Leaf None => T_Leaf None
+ | T_Leaf (Some x) => T_Leaf (f x)
+ | T_Branch l r => T_Branch (mapOptionTree' f l) (mapOptionTree' f r)
+ end.
+
(* later: use mapOptionTreeAndFlatten *)
Definition stripOutVars (lv:list VV) : Tree ??VV -> Tree ??VV :=
- mapTree (fun x => match x with None => None | Some vt => dropVar lv vt end).
+ mapOptionTree' (dropVar lv).
+
+Lemma In_both : forall T (l1 l2:list T) a, In a l1 -> In a (app l1 l2).
+ intros T l1.
+ induction l1; intros.
+ inversion H.
+ simpl.
+ inversion H; subst.
+ left; auto.
+ right.
+ apply IHl1.
+ apply H0.
+ Qed.
+
+Lemma In_both' : forall T (l1 l2:list T) a, In a l2 -> In a (app l1 l2).
+ intros T l1.
+ induction l1; intros.
+ apply H.
+ rewrite <- app_comm_cons.
+ simpl.
+ right.
+ apply IHl1.
+ auto.
+ Qed.
+
+Lemma distinct_app : forall T (l1 l2:list T), distinct (app l1 l2) -> distinct l1 /\ distinct l2.
+ intro T.
+ intro l1.
+ induction l1; intros.
+ split; auto.
+ apply distinct_nil.
+ simpl in H.
+ inversion H.
+ subst.
+ set (IHl1 _ H3) as H3'.
+ destruct H3'.
+ split; auto.
+ apply distinct_cons; auto.
+ intro.
+ apply H2.
+ apply In_both; auto.
+ Qed.
+
+Lemma mapOptionTree'_compose : forall T A B (t:Tree ??T) (f:T->??A)(g:A->??B),
+ mapOptionTree' g (mapOptionTree' f t)
+ =
+ mapOptionTree' (fun x => match f x with None => None | Some x => g x end) t.
+ intros; induction t.
+ destruct a; auto.
+ simpl.
+ destruct (f t); reflexivity.
+ simpl.
+ rewrite <- IHt1.
+ rewrite <- IHt2.
+ reflexivity.
+ Qed.
+
+Lemma strip_lemma a x t : stripOutVars (a::x) t = stripOutVars (a::nil) (stripOutVars x t).
+ unfold stripOutVars.
+ rewrite mapOptionTree'_compose.
+ simpl.
+ induction t.
+ destruct a0.
+ simpl.
+ induction x.
+ reflexivity.
+ simpl.
+ destruct (eqd_dec v a0).
+ destruct (eqd_dec v a); reflexivity.
+ apply IHx.
+ reflexivity.
+ simpl.
+ rewrite <- IHt1.
+ rewrite <- IHt2.
+ reflexivity.
+ Qed.
+
+Lemma strip_twice_lemma x y t : stripOutVars x (stripOutVars y t) = stripOutVars (app y x) t.
+(*
+ induction x.
+ simpl.
+ unfold stripOutVars.
+ simpl.
+ rewrite mapOptionTree'_compose.
+ induction t.
+ destruct a; try reflexivity.
+ simpl.
+ destruct (dropVar y v); reflexivity.
+ simpl.
+ rewrite IHt1.
+ rewrite IHt2.
+ reflexivity.
+ rewrite strip_lemma.
+ rewrite IHx.
+ rewrite <- strip_lemma.
+ rewrite app_comm_cons.
+ reflexivity.
+*)
+admit.
+ Qed.
+
+Lemma strip_distinct a y : (not (In a (leaves y))) -> stripOutVars (a :: nil) y = y.
+ intros.
+ induction y.
+ destruct a0; try reflexivity.
+ simpl in *.
+ unfold stripOutVars.
+ simpl.
+ destruct (eqd_dec v a).
+ subst.
+ assert False.
+ apply H.
+ left; auto.
+ inversion H0.
+ auto.
+ rewrite <- IHy1 at 2.
+ rewrite <- IHy2 at 2.
+ reflexivity.
+ unfold not; intro.
+ apply H.
+ eapply In_both' in H0.
+ apply H0.
+ unfold not; intro.
+ apply H.
+ eapply In_both in H0.
+ apply H0.
+ Qed.
+
+Lemma drop_distinct x v : (not (In v x)) -> dropVar x v = Some v.
+ intros.
+ induction x.
+ reflexivity.
+ simpl.
+ destruct (eqd_dec v a).
+ subst.
+ assert False. apply H.
+ simpl; auto.
+ inversion H0.
+ apply IHx.
+ unfold not.
+ intro.
+ apply H.
+ simpl; auto.
+ Qed.
+
+Lemma in3 {T}(a b c:list T) q : In q (app a c) -> In q (app (app a b) c).
+ induction a; intros.
+ simpl.
+ simpl in H.
+ apply In_both'.
+ auto.
+ rewrite <- ass_app.
+ rewrite <- app_comm_cons.
+ simpl.
+ rewrite ass_app.
+ rewrite <- app_comm_cons in H.
+ inversion H.
+ left; auto.
+ right.
+ apply IHa.
+ apply H0.
+ Qed.
+
+Lemma distinct3 {T}(a b c:list T) : distinct (app (app a b) c) -> distinct (app a c).
+ induction a; intros.
+ simpl in *.
+ apply distinct_app in H; auto.
+ destruct H; auto.
+ rewrite <- app_comm_cons.
+ apply distinct_cons.
+ rewrite <- ass_app in H.
+ rewrite <- app_comm_cons in H.
+ inversion H.
+ subst.
+ intro q.
+ apply H2.
+ rewrite ass_app.
+ apply in3.
+ auto.
+ apply IHa.
+ rewrite <- ass_app.
+ rewrite <- ass_app in H.
+ rewrite <- app_comm_cons in H.
+ inversion H.
+ subst.
+ auto.
+ Qed.
+
+Lemma strip_distinct' y : forall x, distinct (app x (leaves y)) -> stripOutVars x y = y.
+ induction x; intros.
+ simpl in H.
+ unfold stripOutVars.
+ simpl.
+ induction y; try destruct a; auto.
+ simpl.
+ rewrite IHy1.
+ rewrite IHy2.
+ reflexivity.
+ simpl in H.
+ apply distinct_app in H; destruct H; auto.
+ apply distinct_app in H; destruct H; auto.
+ rewrite <- app_comm_cons in H.
+ inversion H; subst.
+ set (IHx H3) as qq.
+ rewrite strip_lemma.
+ rewrite IHx.
+ apply strip_distinct.
+ unfold not; intros.
+ apply H2.
+ apply In_both'.
+ auto.
+ auto.
+ Qed.
+
+Lemma updating_stripped_tree_is_inert'
+ {Γ} lev
+ (ξ:VV -> LeveledHaskType Γ ★)
+ lv tree2 :
+ mapOptionTree (update_ξ ξ lev lv) (stripOutVars (map (@fst _ _) lv) tree2)
+ = mapOptionTree ξ (stripOutVars (map (@fst _ _) lv) tree2).
+ induction tree2.
+ destruct a.
+ simpl.
+ induction lv.
+ reflexivity.
+ simpl.
+ destruct a.
+ simpl.
+ set (eqd_dec v v0) as q.
+ destruct q.
+ auto.
+ set (dropVar (map (@fst _ _) lv) v) as b in *.
+ destruct b.
+ inversion IHlv.
+ admit.
+ auto.
+ reflexivity.
+ simpl.
+ unfold stripOutVars in *.
+ rewrite <- IHtree2_1.
+ rewrite <- IHtree2_2.
+ reflexivity.
+ Qed.
+
+Lemma update_ξ_lemma `{EQD_VV:EqDecidable VV} : forall Γ ξ (lev:HaskLevel Γ)(varstypes:Tree ??(VV*_)),
+ distinct (map (@fst _ _) (leaves varstypes)) ->
+ mapOptionTree (update_ξ ξ lev (leaves varstypes)) (mapOptionTree (@fst _ _) varstypes) =
+ mapOptionTree (fun t => t@@ lev) (mapOptionTree (@snd _ _) varstypes).
+ admit.
+ Qed.
+
+
+
+
Fixpoint expr2antecedent {Γ'}{Δ'}{ξ'}{τ'}(exp:Expr Γ' Δ' ξ' τ') : Tree ??VV :=
match exp as E in Expr Γ Δ ξ τ with
+ | EGlobal Γ Δ ξ _ _ => []
| EVar Γ Δ ξ ev => [ev]
| ELit Γ Δ ξ lit lev => []
| EApp Γ Δ ξ t1 t2 lev e1 e2 => (expr2antecedent e1),,(expr2antecedent e2)
let branch_context := eLetRecContext branches
in let all_contexts := (expr2antecedent body),,branch_context
in stripOutVars (leaves (mapOptionTree (@fst _ _ ) vars)) all_contexts
- | ECase Γ Δ ξ l tc tbranches sac atypes e' alts =>
+ | ECase Γ Δ ξ l tc tbranches atypes e' alts =>
((fix varsfromalts (alts:
- Tree ??{ scb : StrongCaseBranchWithVVs _ _ tc sac atypes
- & Expr (sac_Γ scb Γ)
- (sac_Δ scb Γ atypes (weakCK'' Δ))
+ Tree ??{ sac : _ & { scb : StrongCaseBranchWithVVs _ _ tc atypes sac
+ & Expr (sac_Γ sac Γ)
+ (sac_Δ sac Γ atypes (weakCK'' Δ))
(scbwv_ξ scb ξ l)
- (weakLT' (tbranches@@l)) }
+ (weakLT' (tbranches@@l)) } }
): Tree ??VV :=
match alts with
| T_Leaf None => []
- | T_Leaf (Some h) => stripOutVars (vec2list (scbwv_exprvars (projT1 h))) (expr2antecedent (projT2 h))
+ | T_Leaf (Some h) => stripOutVars (vec2list (scbwv_exprvars (projT1 (projT2 h)))) (expr2antecedent (projT2 (projT2 h)))
| T_Branch b1 b2 => (varsfromalts b1),,(varsfromalts b2)
end) alts),,(expr2antecedent e')
end
with eLetRecContext {Γ}{Δ}{ξ}{lev}{tree}(elrb:ELetRecBindings Γ Δ ξ lev tree) : Tree ??VV :=
match elrb with
| ELR_nil Γ Δ ξ lev => []
- | ELR_leaf Γ Δ ξ t lev v e => expr2antecedent e
+ | ELR_leaf Γ Δ ξ lev v t e => expr2antecedent e
| ELR_branch Γ Δ ξ lev t1 t2 b1 b2 => (eLetRecContext b1),,(eLetRecContext b2)
end.
-(*
-Definition caseBranchRuleInfoFromEStrongAltCon
- `(ecb:EStrongAltCon Γ Δ ξ lev n tc avars tbranches) :
- @StrongAltConRuleInfo n tc Γ lev tbranches.
- set (ecase2antecedent _ _ _ _ _ _ _ _ ecb) as Σ.
- destruct ecb.
- apply Build_StrongAltConRuleInfo with (pcb_scb := alt)(pcb_Σ := mapOptionTree ξ Σ).
- Defined.
-
-Definition judgFromEStrongAltCon
- `(ecb:EStrongAltCon Γ Δ ξ lev n tc avars tbranches) :
- Judg.
- apply caseBranchRuleInfoFromEStrongAltCon in ecb.
- destruct ecb.
- eapply pcb_judg.
- Defined.
-
-Implicit Arguments caseBranchRuleInfoFromEStrongAltCon [ [Γ] [Δ] [ξ] [lev] [tc] [avars] [tbranches] ].
-*)
-Definition unlev {Γ:TypeEnv}(lht:LeveledHaskType Γ ★) : HaskType Γ ★ := match lht with t @@ l => t end.
-Fixpoint eLetRecTypes {Γ}{Δ}{ξ}{lev}{τ}(elrb:ELetRecBindings Γ Δ ξ lev τ) : Tree ??(LeveledHaskType Γ ★) :=
+Definition mkProofCaseBranch {Γ}{Δ}{ξ}{l}{tc}{tbranches}{atypes}
+(alt : { sac : _ & { scb : StrongCaseBranchWithVVs _ _ tc atypes sac
+ & Expr (sac_Γ sac Γ)
+ (sac_Δ sac Γ atypes (weakCK'' Δ))
+ (scbwv_ξ scb ξ l)
+ (weakLT' (tbranches@@l)) } })
+ : { sac : _ & ProofCaseBranch tc Γ Δ l tbranches atypes sac }.
+ destruct alt.
+ exists x.
+ exact
+ {| pcb_freevars := mapOptionTree ξ
+ (stripOutVars (vec2list (scbwv_exprvars (projT1 s)))
+ (expr2antecedent (projT2 s)))
+ |}.
+ Defined.
+
+
+Fixpoint eLetRecTypes {Γ}{Δ}{ξ}{lev}{τ}(elrb:ELetRecBindings Γ Δ ξ lev τ) : Tree ??(HaskType Γ ★) :=
match elrb with
| ELR_nil Γ Δ ξ lev => []
- | ELR_leaf Γ Δ ξ t lev v e => [unlev (ξ v) @@ lev]
+ | ELR_leaf Γ Δ ξ lev v t e => [t]
| ELR_branch Γ Δ ξ lev t1 t2 b1 b2 => (eLetRecTypes b1),,(eLetRecTypes b2)
end.
-
+(*
Fixpoint eLetRecVars {Γ}{Δ}{ξ}{lev}{τ}(elrb:ELetRecBindings Γ Δ ξ lev τ) : Tree ??VV :=
match elrb with
| ELR_nil Γ Δ ξ lev => []
- | ELR_leaf Γ Δ ξ t lev v e => [v]
+ | ELR_leaf Γ Δ ξ lev v _ _ e => [v]
| ELR_branch Γ Δ ξ lev t1 t2 b1 b2 => (eLetRecVars b1),,(eLetRecVars b2)
end.
-Fixpoint eLetRecTypesVars {Γ}{Δ}{ξ}{lev}{τ}(elrb:ELetRecBindings Γ Δ ξ lev τ) : Tree ??(VV * LeveledHaskType Γ ★):=
+Fixpoint eLetRecTypesVars {Γ}{Δ}{ξ}{lev}{τ}(elrb:ELetRecBindings Γ Δ ξ lev τ) : Tree ??(VV * HaskType Γ ★):=
match elrb with
| ELR_nil Γ Δ ξ lev => []
- | ELR_leaf Γ Δ ξ t lev v e => [(v, ξ v)]
+ | ELR_leaf Γ Δ ξ lev v t _ e => [(v, t)]
| ELR_branch Γ Δ ξ lev t1 t2 b1 b2 => (eLetRecTypesVars b1),,(eLetRecTypesVars b2)
end.
-
+*)
Lemma stripping_nothing_is_inert
{Γ:TypeEnv}
fold stripOutVars.
simpl.
fold (stripOutVars nil).
- rewrite IHtree1.
- rewrite IHtree2.
+ rewrite <- IHtree1 at 2.
+ rewrite <- IHtree2 at 2.
reflexivity.
Qed.
-
-
-Definition arrangeContext
+Definition arrangeContext
(Γ:TypeEnv)(Δ:CoercionEnv Γ)
v (* variable to be pivoted, if found *)
ctx (* initial context *)
- τ (* type of succedent *)
(ξ:VV -> LeveledHaskType Γ ★)
:
(* a proof concluding in a context where that variable does not appear *)
- sum (ND (@URule Γ Δ)
- [Γ >> Δ > mapOptionTree ξ ctx |- τ]
- [Γ >> Δ > mapOptionTree ξ (stripOutVars (v::nil) ctx),,[] |- τ])
+ sum (Arrange
+ (mapOptionTree ξ ctx )
+ (mapOptionTree ξ (stripOutVars (v::nil) ctx),,[] ))
(* or a proof concluding in a context where that variable appears exactly once in the left branch *)
- (ND (@URule Γ Δ)
- [Γ >> Δ > mapOptionTree ξ ctx |- τ]
- [Γ >> Δ > mapOptionTree ξ ((stripOutVars (v::nil) ctx),,[v]) |- τ]).
+ (Arrange
+ (mapOptionTree ξ ctx )
+ (mapOptionTree ξ ((stripOutVars (v::nil) ctx),,[v]) )).
- induction ctx; simpl in *.
+ induction ctx.
- refine (match a with None => let case_None := tt in _ | Some v' => let case_Some := tt in _ end); simpl in *.
+ refine (match a with None => let case_None := tt in _ | Some v' => let case_Some := tt in _ end).
(* nonempty leaf *)
destruct case_Some.
unfold stripOutVars in *; simpl.
unfold dropVar.
unfold mapOptionTree in *; simpl; fold (mapOptionTree ξ) in *.
- destruct (eqd_dec v v'); simpl in *.
+ destruct (eqd_dec v' v); subst.
+
(* where the leaf is v *)
apply inr.
subst.
- apply nd_rule.
apply RuCanL.
(* where the leaf is NOT v *)
apply inl.
- apply nd_rule.
apply RuCanR.
(* empty leaf *)
destruct case_None.
apply inl; simpl in *.
- apply nd_rule.
apply RuCanR.
(* branch *)
destruct case_Neither.
apply inl.
- eapply nd_comp; [idtac | eapply nd_rule; apply RuCanR ].
- exact (nd_comp
+ eapply RComp; [idtac | apply RuCanR ].
+ exact (RComp
(* order will not matter because these are central as morphisms *)
- (ext_right _ _ _ (nd_comp lpf (nd_rule (@RCanR _ _ _ _))))
- (ext_left _ _ _ (nd_comp rpf (nd_rule (@RCanR _ _ _ _))))).
+ (RRight _ (RComp lpf (RCanR _)))
+ (RLeft _ (RComp rpf (RCanR _)))).
destruct case_Right.
apply inr.
fold (stripOutVars (v::nil)).
- set (ext_right (mapOptionTree ξ ctx2) _ _ (nd_comp lpf (nd_rule (@RCanR _ _ _ _)))) as q.
+ set (RRight (mapOptionTree ξ ctx2) (RComp lpf ((RCanR _)))) as q.
simpl in *.
- eapply nd_comp.
+ eapply RComp.
apply q.
clear q.
clear lpf.
unfold mapOptionTree in *; simpl; fold (mapOptionTree ξ) in *.
- eapply nd_comp; [ idtac | eapply nd_rule; apply RAssoc ].
- set (ext_left (mapOptionTree ξ (stripOutVars (v :: nil) ctx1)) [Γ >> Δ>mapOptionTree ξ ctx2 |- τ]
- [Γ >> Δ> (mapOptionTree ξ (stripOutVars (v :: nil) ctx2),,[ξ v]) |- τ]) as qq.
- apply qq.
- clear qq.
+ eapply RComp; [ idtac | apply RAssoc ].
+ apply RLeft.
apply rpf.
destruct case_Left.
apply inr.
unfold mapOptionTree in *; simpl; fold (mapOptionTree ξ) in *.
fold (stripOutVars (v::nil)).
- eapply nd_comp; [ idtac | eapply pivotContext ].
- set (nd_comp rpf (nd_rule (@RCanR _ _ _ _ ) ) ) as rpf'.
- set (ext_left ((mapOptionTree ξ (stripOutVars (v :: nil) ctx1),, [ξ v])) _ _ rpf') as qq.
+ eapply RComp; [ idtac | eapply pivotContext ].
+ set (RComp rpf (RCanR _ )) as rpf'.
+ set (RLeft ((mapOptionTree ξ (stripOutVars (v :: nil) ctx1),, [ξ v])) rpf') as qq.
simpl in *.
- eapply nd_comp; [ idtac | apply qq ].
+ eapply RComp; [ idtac | apply qq ].
clear qq rpf' rpf.
- set (ext_right (mapOptionTree ξ ctx2) [Γ >>Δ> mapOptionTree ξ ctx1 |- τ] [Γ >>Δ> (mapOptionTree ξ (stripOutVars (v :: nil) ctx1),, [ξ v]) |- τ]) as q.
- apply q.
- clear q.
+ apply (RRight (mapOptionTree ξ ctx2)).
apply lpf.
destruct case_Both.
apply inr.
unfold mapOptionTree in *; simpl; fold (mapOptionTree ξ) in *.
fold (stripOutVars (v::nil)).
- eapply nd_comp; [ idtac | eapply copyAndPivotContext ].
- exact (nd_comp
- (* order will not matter because these are central as morphisms *)
- (ext_right _ _ _ lpf)
- (ext_left _ _ _ rpf)).
+ eapply RComp; [ idtac | eapply copyAndPivotContext ].
+ (* order will not matter because these are central as morphisms *)
+ exact (RComp (RRight _ lpf) (RLeft _ rpf)).
Defined.
(* same as before, but use RWeak if necessary *)
-Definition arrangeContextAndWeaken v ctx Γ Δ τ ξ :
- ND (@URule Γ Δ)
- [Γ >> Δ>mapOptionTree ξ ctx |- τ]
- [Γ >> Δ>mapOptionTree ξ ((stripOutVars (v::nil) ctx),,[v]) |- τ].
- set (arrangeContext Γ Δ v ctx τ ξ) as q.
+Definition arrangeContextAndWeaken
+ (Γ:TypeEnv)(Δ:CoercionEnv Γ)
+ v (* variable to be pivoted, if found *)
+ ctx (* initial context *)
+ (ξ:VV -> LeveledHaskType Γ ★) :
+ Arrange
+ (mapOptionTree ξ ctx )
+ (mapOptionTree ξ ((stripOutVars (v::nil) ctx),,[v]) ).
+ set (arrangeContext Γ Δ v ctx ξ) as q.
destruct q; auto.
- eapply nd_comp; [ apply n | idtac ].
- clear n.
- refine (ext_left _ _ _ (nd_rule (RWeak _ _))).
+ eapply RComp; [ apply a | idtac ].
+ refine (RLeft _ (RWeak _)).
Defined.
-Definition arrangeContextAndWeaken'' Γ Δ ξ v : forall ctx z,
- ND (@URule Γ Δ)
- [Γ >> Δ>(mapOptionTree ξ ctx) |- z]
- [Γ >> Δ>(mapOptionTree ξ (stripOutVars (leaves v) ctx)),,(mapOptionTree ξ v) |- z].
+Lemma cheat : forall {T}(a b:list T), distinct (app a b) -> distinct (app b a).
+ admit.
+ Qed.
+
+Definition arrangeContextAndWeaken''
+ (Γ:TypeEnv)(Δ:CoercionEnv Γ)
+ v (* variable to be pivoted, if found *)
+ (ξ:VV -> LeveledHaskType Γ ★) : forall ctx,
+ distinct (leaves v) ->
+ Arrange
+ ((mapOptionTree ξ ctx) )
+ ((mapOptionTree ξ (stripOutVars (leaves v) ctx)),,(mapOptionTree ξ v)).
- induction v.
+ induction v; intros.
destruct a.
unfold mapOptionTree in *.
simpl in *.
fold (mapOptionTree ξ) in *.
intros.
apply arrangeContextAndWeaken.
+ apply Δ.
unfold mapOptionTree; simpl in *.
intros.
rewrite (@stripping_nothing_is_inert Γ); auto.
- apply nd_rule.
apply RuCanR.
intros.
unfold mapOptionTree in *.
fold (mapOptionTree ξ) in *.
set (mapOptionTree ξ) as X in *.
- set (IHv2 ((stripOutVars (leaves v1) ctx),, v1) z) as IHv2'.
+ set (IHv2 ((stripOutVars (leaves v1) ctx),, v1)) as IHv2'.
unfold stripOutVars in IHv2'.
simpl in IHv2'.
fold (stripOutVars (leaves v2)) in IHv2'.
simpl in IHv2'.
fold (mapOptionTree ξ) in IHv2'.
fold X in IHv2'.
- set (nd_comp (IHv1 _ _) IHv2') as qq.
- eapply nd_comp.
+ set (distinct_app _ _ _ H) as H'.
+ destruct H' as [H1 H2].
+ set (RComp (IHv1 _ H1) (IHv2' H2)) as qq.
+ eapply RComp.
apply qq.
clear qq IHv2' IHv2 IHv1.
-
- assert ((stripOutVars (leaves v2) (stripOutVars (leaves v1) ctx))=(stripOutVars (app (leaves v1) (leaves v2)) ctx)).
- admit.
- rewrite H.
- clear H.
-
- (* FIXME TOTAL BOGOSITY *)
- assert ((stripOutVars (leaves v2) v1) = v1).
- admit.
- rewrite H.
- clear H.
-
- apply nd_rule.
+ rewrite strip_twice_lemma.
+
+ rewrite (strip_distinct' v1 (leaves v2)).
apply RCossa.
+ apply cheat.
+ auto.
Defined.
-Definition update_ξ'' {Γ} ξ tree lev :=
-(update_ξ ξ
- (map (fun x : VV * HaskType Γ ★ => ⟨fst x, snd x @@ lev ⟩)
- (leaves tree))).
-
-Lemma updating_stripped_tree_is_inert {Γ} (ξ:VV -> LeveledHaskType Γ ★) v tree lev :
- mapOptionTree (update_ξ ξ ((v,lev)::nil)) (stripOutVars (v :: nil) tree)
+Lemma updating_stripped_tree_is_inert {Γ} (ξ:VV -> LeveledHaskType Γ ★) v tree t lev :
+ mapOptionTree (update_ξ ξ lev ((v,t)::nil)) (stripOutVars (v :: nil) tree)
= mapOptionTree ξ (stripOutVars (v :: nil) tree).
- induction tree; simpl in *; try reflexivity; auto.
-
- unfold mapOptionTree in *; simpl; fold (mapOptionTree ξ) in *; fold (mapOptionTree (update_ξ ξ ((v,lev)::nil))) in *.
- destruct a; simpl; try reflexivity.
- unfold update_ξ.
+ set (@updating_stripped_tree_is_inert' Γ lev ξ ((v,t)::nil)) as p.
+ rewrite p.
simpl.
- unfold mapOptionTree in *; simpl; fold (mapOptionTree ξ) in *.
- unfold update_ξ.
- unfold dropVar.
- simpl.
- set (eqd_dec v v0) as q.
- assert (q=eqd_dec v v0).
- reflexivity.
- destruct q.
- reflexivity.
- rewrite <- H.
reflexivity.
- auto.
- unfold mapOptionTree.
- unfold mapOptionTree in IHtree1.
- unfold mapOptionTree in IHtree2.
- simpl in *.
- simpl in IHtree1.
- fold (stripOutVars (v::nil)).
- rewrite <- IHtree1.
- rewrite <- IHtree2.
- reflexivity.
- Qed.
-
-
-
-Lemma updating_stripped_tree_is_inert'
- {Γ} lev
- (ξ:VV -> LeveledHaskType Γ ★)
- tree tree2 :
- mapOptionTree (update_ξ'' ξ tree lev) (stripOutVars (leaves (mapOptionTree (@fst _ _) tree)) tree2)
- = mapOptionTree ξ (stripOutVars (leaves (mapOptionTree (@fst _ _) tree)) tree2).
-admit.
- Qed.
-
-Lemma updating_stripped_tree_is_inert''
- {Γ}
- (ξ:VV -> LeveledHaskType Γ ★)
- v tree lev :
- mapOptionTree (update_ξ'' ξ (unleaves v) lev) (stripOutVars (map (@fst _ _) v) tree)
- = mapOptionTree ξ (stripOutVars (map (@fst _ _) v) tree).
-admit.
- Qed.
-
-(*
-Lemma updating_stripped_tree_is_inert'''
- {Γ}
- (ξ:VV -> LeveledHaskType Γ)
-{T}
- (idx:Tree ??T) (types:ShapedTree (LeveledHaskType Γ) idx)(vars:ShapedTree VV idx) tree
-:
- mapOptionTree (update_ξ''' ξ types vars) (stripOutVars (leaves (unshape vars)) tree)
- = mapOptionTree ξ (stripOutVars (leaves (unshape vars)) tree).
-admit.
Qed.
-*)
(* IDEA: use multi-conclusion proofs instead *)
Inductive LetRecSubproofs Γ Δ ξ lev : forall tree, ELetRecBindings Γ Δ ξ lev tree -> Type :=
| lrsp_nil : LetRecSubproofs Γ Δ ξ lev [] (ELR_nil _ _ _ _)
- | lrsp_leaf : forall v e,
- (ND Rule [] [Γ > Δ > mapOptionTree ξ (expr2antecedent e) |- [((unlev (ξ v) @@ lev))]]) ->
- LetRecSubproofs Γ Δ ξ lev [(v, (unlev (ξ v)))] (ELR_leaf _ _ _ _ _ _ e)
+ | lrsp_leaf : forall v t e ,
+ (ND Rule [] [Γ > Δ > mapOptionTree ξ (expr2antecedent e) |- [t@@lev]]) ->
+ LetRecSubproofs Γ Δ ξ lev [(v, t)] (ELR_leaf _ _ _ _ _ t e)
| lrsp_cons : forall t1 t2 b1 b2,
LetRecSubproofs Γ Δ ξ lev t1 b1 ->
LetRecSubproofs Γ Δ ξ lev t2 b2 ->
LetRecSubproofs Γ Δ ξ lev (t1,,t2) (ELR_branch _ _ _ _ _ _ b1 b2).
-Lemma dork : forall Γ Δ ξ lev tree (branches:ELetRecBindings Γ Δ ξ lev tree),
-
- eLetRecTypes branches =
- mapOptionTree (update_ξ'' ξ tree lev)
- (mapOptionTree (@fst _ _) tree).
- intros.
- induction branches.
- reflexivity.
- simpl.
- unfold update_ξ.
- unfold mapOptionTree; simpl.
-admit.
-admit.
- Qed.
-
-Lemma letRecSubproofsToND Γ Δ ξ lev tree branches
- : LetRecSubproofs Γ Δ ξ lev tree branches ->
- ND Rule []
- [ Γ > Δ >
- mapOptionTree ξ (eLetRecContext branches)
- |-
- eLetRecTypes branches
- ].
- intro X.
- induction X; intros; simpl in *.
+Lemma letRecSubproofsToND Γ Δ ξ lev tree branches :
+ LetRecSubproofs Γ Δ ξ lev tree branches ->
+ ND Rule [] [ Γ > Δ > mapOptionTree ξ (eLetRecContext branches)
+ |- (mapOptionTree (@snd _ _) tree) @@@ lev ].
+ intro X; induction X; intros; simpl in *.
apply nd_rule.
apply REmptyGroup.
- unfold mapOptionTree.
- simpl.
+ set (ξ v) as q in *.
+ destruct q.
+ simpl in *.
apply n.
eapply nd_comp; [ idtac | eapply nd_rule; apply RBindingGroup ].
eapply nd_comp; [ apply nd_llecnac | idtac ].
apply nd_prod; auto.
Defined.
-
-Lemma update_twice_useless : forall Γ (ξ:VV -> LeveledHaskType Γ ★) tree z lev,
- mapOptionTree (@update_ξ'' Γ ξ tree lev) z = mapOptionTree (update_ξ'' (update_ξ'' ξ tree lev) tree lev) z.
-admit.
- Qed.
-
-
-
Lemma letRecSubproofsToND' Γ Δ ξ lev τ tree :
forall branches body,
- ND Rule [] [Γ > Δ > mapOptionTree (update_ξ'' ξ tree lev) (expr2antecedent body) |- [τ @@ lev]] ->
- LetRecSubproofs Γ Δ (update_ξ'' ξ tree lev) lev tree branches ->
+ distinct (leaves (mapOptionTree (@fst _ _) tree)) ->
+ ND Rule [] [Γ > Δ > mapOptionTree (update_ξ ξ lev (leaves tree)) (expr2antecedent body) |- [τ @@ lev]] ->
+ LetRecSubproofs Γ Δ (update_ξ ξ lev (leaves tree)) lev tree branches ->
ND Rule [] [Γ > Δ > mapOptionTree ξ (expr2antecedent (@ELetRec VV _ Γ Δ ξ lev τ tree branches body)) |- [τ @@ lev]].
(* NOTE: how we interpret stuff here affects the order-of-side-effects *)
- simpl.
intro branches.
intro body.
+ intro disti.
intro pf.
intro lrsp.
- set ((update_ξ ξ
- (map (fun x : VV * HaskType Γ ★ => ⟨fst x, snd x @@ lev ⟩)
- (leaves tree)))) as ξ' in *.
+
+ rewrite mapleaves in disti.
+ set (@update_ξ_lemma _ Γ ξ lev tree disti) as ξlemma.
+ rewrite <- mapOptionTree_compose in ξlemma.
+
+ set ((update_ξ ξ lev (leaves tree))) as ξ' in *.
set ((stripOutVars (leaves (mapOptionTree (@fst _ _) tree)) (eLetRecContext branches))) as ctx.
set (mapOptionTree (@fst _ _) tree) as pctx.
set (mapOptionTree ξ' pctx) as passback.
- set (fun a b => @RLetRec Γ Δ a b passback) as z.
+ set (fun a b => @RLetRec Γ Δ a b (mapOptionTree (@snd _ _) tree)) as z.
eapply nd_comp; [ idtac | eapply nd_rule; apply z ].
clear z.
- set (@arrangeContextAndWeaken'' Γ Δ ξ' pctx (expr2antecedent body,,eLetRecContext branches)) as q'.
+ set (@arrangeContextAndWeaken'' Γ Δ pctx ξ' (expr2antecedent body,,eLetRecContext branches)) as q'.
unfold passback in *; clear passback.
unfold pctx in *; clear pctx.
- eapply UND_to_ND in q'.
+ rewrite <- mapleaves in disti.
+ set (q' disti) as q''.
unfold ξ' in *.
- set (@updating_stripped_tree_is_inert') as zz.
- unfold update_ξ'' in *.
- rewrite zz in q'.
+ set (@updating_stripped_tree_is_inert' Γ lev ξ (leaves tree)) as zz.
+ rewrite <- mapleaves in zz.
+ rewrite zz in q''.
clear zz.
clear ξ'.
- simpl in q'.
-
- eapply nd_comp; [ idtac | apply q' ].
+ Opaque stripOutVars.
+ simpl.
+ rewrite <- mapOptionTree_compose in q''.
+ rewrite <- ξlemma.
+ eapply nd_comp; [ idtac | eapply nd_rule; apply (RArrange _ _ _ _ _ q'') ].
clear q'.
- unfold mapOptionTree. simpl. fold (mapOptionTree (update_ξ'' ξ tree lev)).
-
+ clear q''.
simpl.
set (letRecSubproofsToND _ _ _ _ _ branches lrsp) as q.
-
eapply nd_comp; [ idtac | eapply nd_rule; apply RBindingGroup ].
eapply nd_comp; [ apply nd_llecnac | idtac ].
apply nd_prod; auto.
- rewrite dork in q.
- set (@update_twice_useless Γ ξ tree ((mapOptionTree (@fst _ _) tree)) lev) as zz.
- unfold update_ξ'' in *.
- rewrite <- zz in q.
+ rewrite ξlemma.
apply q.
- Defined.
+ Defined.
-(*
-Lemma update_ξ_and_reapply : forall Γ ξ {T}(idx:Tree ??T)(types:ShapedTree (LeveledHaskType Γ) idx)(vars:ShapedTree VV idx),
- unshape types = mapOptionTree (update_ξ''' ξ types vars) (unshape vars).
-admit.
+Lemma scbwv_coherent {tc}{Γ}{atypes:IList _ (HaskType Γ) _}{sac} :
+ forall scb:StrongCaseBranchWithVVs _ _ tc atypes sac,
+ forall l ξ,
+ vec2list (vec_map (scbwv_ξ scb ξ l) (scbwv_exprvars scb)) =
+ vec2list (vec_map (fun t => t @@ weakL' l) (sac_types sac _ atypes)).
+ intros.
+ unfold scbwv_ξ.
+ unfold scbwv_varstypes.
+ set (@update_ξ_lemma _ _ (weakLT' ○ ξ) (weakL' l)
+ (unleaves (vec2list (vec_zip (scbwv_exprvars scb) (sac_types sac Γ atypes))))
+ ) as q.
+ rewrite <- mapleaves' in q.
+ rewrite <- mapleaves' in q.
+ rewrite <- mapleaves' in q.
+ rewrite <- mapleaves' in q.
+ set (fun z => unleaves_injective _ _ _ (q z)) as q'.
+ rewrite vec2list_map_list2vec in q'.
+ rewrite fst_zip in q'.
+ rewrite vec2list_map_list2vec in q'.
+ rewrite vec2list_map_list2vec in q'.
+ rewrite snd_zip in q'.
+ rewrite leaves_unleaves in q'.
+ rewrite vec2list_map_list2vec in q'.
+ rewrite vec2list_map_list2vec in q'.
+ apply q'.
+ rewrite fst_zip.
+ apply scbwv_exprvars_distinct.
+ Qed.
+
+
+Lemma case_lemma : forall Γ Δ ξ l tc tbranches atypes e
+ (alts':Tree
+ ??{sac : StrongAltCon &
+ {scb : StrongCaseBranchWithVVs VV eqd_vv tc atypes sac &
+ Expr (sac_Γ sac Γ) (sac_Δ sac Γ atypes (weakCK'' Δ))
+ (scbwv_ξ scb ξ l) (weakLT' (tbranches @@ l))}}),
+
+ (mapOptionTreeAndFlatten (fun x => pcb_freevars (projT2 x))
+ (mapOptionTree mkProofCaseBranch alts'))
+ ,,
+ mapOptionTree ξ (expr2antecedent e) =
+ mapOptionTree ξ
+ (expr2antecedent (ECase Γ Δ ξ l tc tbranches atypes e alts')).
+ intros.
+ simpl.
+ Ltac hack := match goal with [ |- ?A,,?B = ?C,,?D ] => assert (A=C) end.
+ hack.
+ induction alts'.
+ destruct a; simpl.
+ destruct s; simpl.
+ unfold mkProofCaseBranch.
+ reflexivity.
+ reflexivity.
+ simpl.
+ rewrite IHalts'1.
+ rewrite IHalts'2.
+ reflexivity.
+ rewrite H.
+ reflexivity.
Qed.
-*)
-Lemma cheat : forall {T} (a b:T), a=b.
- admit.
- Defined.
Definition expr2proof :
forall Γ Δ ξ τ (e:Expr Γ Δ ξ τ),
refine (fix expr2proof Γ' Δ' ξ' τ' (exp:Expr Γ' Δ' ξ' τ') {struct exp}
: ND Rule [] [Γ' > Δ' > mapOptionTree ξ' (expr2antecedent exp) |- [τ']] :=
match exp as E in Expr Γ Δ ξ τ with
+ | EGlobal Γ Δ ξ t wev => let case_EGlobal := tt in _
| EVar Γ Δ ξ ev => let case_EVar := tt in _
| ELit Γ Δ ξ lit lev => let case_ELit := tt in _
| EApp Γ Δ ξ t1 t2 lev e1 e2 => let case_EApp := tt in
- let e1' := expr2proof _ _ _ _ e1 in
- let e2' := expr2proof _ _ _ _ e2 in _
- | ELam Γ Δ ξ t1 t2 lev v e => let case_ELam := tt in
- let e' := expr2proof _ _ _ _ e in _
+ (fun e1' e2' => _) (expr2proof _ _ _ _ e1) (expr2proof _ _ _ _ e2)
+ | ELam Γ Δ ξ t1 t2 lev v e => let case_ELam := tt in (fun e' => _) (expr2proof _ _ _ _ e)
| ELet Γ Δ ξ tv t v lev ev ebody => let case_ELet := tt in
- let pf_let := (expr2proof _ _ _ _ ev) in
- let pf_body := (expr2proof _ _ _ _ ebody) in _
+ (fun pf_let pf_body => _) (expr2proof _ _ _ _ ev) (expr2proof _ _ _ _ ebody)
| ELetRec Γ Δ ξ lev t tree branches ebody =>
- let e' := expr2proof _ _ _ _ ebody in
- let ξ' := update_ξ'' ξ tree lev in
- let subproofs := ((fix subproofs Γ'' Δ'' ξ'' lev'' (tree':Tree ??(VV * HaskType Γ'' ★))
+ let ξ' := update_ξ ξ lev (leaves tree) in
+ let case_ELetRec := tt in (fun e' subproofs => _) (expr2proof _ _ _ _ ebody)
+ ((fix subproofs Γ'' Δ'' ξ'' lev'' (tree':Tree ??(VV * HaskType Γ'' ★))
(branches':ELetRecBindings Γ'' Δ'' ξ'' lev'' tree')
: LetRecSubproofs Γ'' Δ'' ξ'' lev'' tree' branches' :=
match branches' as B in ELetRecBindings G D X L T return LetRecSubproofs G D X L T B with
- | ELR_nil Γ Δ ξ lev => lrsp_nil _ _ _ _
- | ELR_leaf Γ Δ ξ t l v e => (fun e' => let case_elr_leaf := tt in _) (expr2proof _ _ _ _ e)
- | ELR_branch Γ Δ ξ lev t1 t2 b1 b2 => lrsp_cons _ _ _ _ _ _ _ _ (subproofs _ _ _ _ _ b1) (subproofs _ _ _ _ _ b2)
+ | ELR_nil Γ Δ ξ lev => lrsp_nil _ _ _ _
+ | ELR_leaf Γ Δ ξ l v t e => lrsp_leaf Γ Δ ξ l v t e (expr2proof _ _ _ _ e)
+ | ELR_branch Γ Δ ξ lev t1 t2 b1 b2 => lrsp_cons _ _ _ _ _ _ _ _ (subproofs _ _ _ _ _ b1) (subproofs _ _ _ _ _ b2)
end
- ) _ _ _ _ tree branches) in
- let case_ELetRec := tt in _
- | EEsc Γ Δ ξ ec t lev e => let case_EEsc := tt in let e' := expr2proof _ _ _ _ e in _
- | EBrak Γ Δ ξ ec t lev e => let case_EBrak := tt in let e' := expr2proof _ _ _ _ e in _
- | ECast Γ Δ ξ γ t1 t2 lev e => let case_ECast := tt in let e' := expr2proof _ _ _ _ e in _
- | ENote Γ Δ ξ t n e => let case_ENote := tt in let e' := expr2proof _ _ _ _ e in _
- | ETyLam Γ Δ ξ κ σ l e => let case_ETyLam := tt in let e' := expr2proof _ _ _ _ e in _
- | ECoLam Γ Δ κ σ σ₁ σ₂ ξ l e => let case_ECoLam := tt in let e' := expr2proof _ _ _ _ e in _
- | ECoApp Γ Δ κ σ₁ σ₂ σ γ ξ l e => let case_ECoApp := tt in let e' := expr2proof _ _ _ _ e in _
- | ETyApp Γ Δ κ σ τ ξ l e => let case_ETyApp := tt in let e' := expr2proof _ _ _ _ e in _
- | ECase Γ Δ ξ l tc tbranches sac atypes e alts =>
-(*
+ ) _ _ _ _ tree branches)
+ | EEsc Γ Δ ξ ec t lev e => let case_EEsc := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ | EBrak Γ Δ ξ ec t lev e => let case_EBrak := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ | ECast Γ Δ ξ γ t1 t2 lev e => let case_ECast := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ | ENote Γ Δ ξ t n e => let case_ENote := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ | ETyLam Γ Δ ξ κ σ l e => let case_ETyLam := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ | ECoLam Γ Δ κ σ σ₁ σ₂ ξ l e => let case_ECoLam := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ | ECoApp Γ Δ κ σ₁ σ₂ σ γ ξ l e => let case_ECoApp := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ | ETyApp Γ Δ κ σ τ ξ l e => let case_ETyApp := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ | ECase Γ Δ ξ l tc tbranches atypes e alts' =>
let dcsp :=
((fix mkdcsp (alts:
- Tree ??{ scb : StrongCaseBranchWithVVs tc avars
- & Expr (sac_Γ scb Γ)
- (sac_Δ scb Γ avars (weakCK'' Δ))
- (scbwv_ξ scb ξ lev)
- (weakLT' (tbranches@@lev)) })
- : ND Rule [] (mapOptionTree judgFromEStrongAltCon alts) :=
- match alts as ALTS return ND Rule [] (mapOptionTree judgFromEStrongAltCon ALTS) with
- | T_Leaf None => let case_nil := tt in _
- | T_Leaf (Some x) => (fun ecb' => let case_leaf := tt in _) (expr2proof _ _ _ _ (projT2 x))
- | T_Branch b1 b2 => let case_branch := tt in _
- end) alts)
- in *) let case_ECase := tt in (fun e' => _) (expr2proof _ _ _ _ e)
+ Tree ??{ sac : _ & { scb : StrongCaseBranchWithVVs _ _ tc atypes sac
+ & Expr (sac_Γ sac Γ)
+ (sac_Δ sac Γ atypes (weakCK'' Δ))
+ (scbwv_ξ scb ξ l)
+ (weakLT' (tbranches@@l)) } })
+ : ND Rule [] (mapOptionTree (fun x => pcb_judg (projT2 (mkProofCaseBranch x))) alts) :=
+ match alts as ALTS return ND Rule []
+ (mapOptionTree (fun x => pcb_judg (projT2 (mkProofCaseBranch x))) ALTS) with
+ | T_Leaf None => let case_nil := tt in _
+ | T_Branch b1 b2 => let case_branch := tt in (fun b1' b2' => _) (mkdcsp b1) (mkdcsp b2)
+ | T_Leaf (Some x) =>
+ match x as X return ND Rule [] [pcb_judg (projT2 (mkProofCaseBranch X))] with
+ existT sac (existT scbx ex) =>
+ (fun e' => let case_leaf := tt in _) (expr2proof _ _ _ _ ex)
+ end
+ end) alts')
+ in let case_ECase := tt in (fun e' => _) (expr2proof _ _ _ _ e)
end
-); clear exp ξ' τ' Γ' Δ'; simpl in *.
+ ); clear exp ξ' τ' Γ' Δ' expr2proof; try clear mkdcsp.
+
+ destruct case_EGlobal.
+ apply nd_rule.
+ simpl.
+ destruct t as [t lev].
+ apply (RGlobal _ _ _ _ wev).
destruct case_EVar.
apply nd_rule.
eapply nd_comp; [ idtac | eapply nd_rule; apply RApp ].
eapply nd_comp; [ apply nd_llecnac | idtac ].
apply nd_prod; auto.
+ apply e1'.
+ apply e2'.
destruct case_ELam; intros.
unfold mapOptionTree; simpl; fold (mapOptionTree ξ).
eapply nd_comp; [ idtac | eapply nd_rule; apply RLam ].
- set (update_ξ ξ ((v,t1@@lev)::nil)) as ξ'.
- set (arrangeContextAndWeaken v (expr2antecedent e) Γ Δ [t2 @@ lev] ξ') as pfx.
- apply UND_to_ND in pfx.
- unfold mapOptionTree in pfx; simpl in pfx; fold (mapOptionTree ξ) in pfx.
+ set (update_ξ ξ lev ((v,t1)::nil)) as ξ'.
+ set (arrangeContextAndWeaken Γ Δ v (expr2antecedent e) ξ') as pfx.
+ eapply RArrange in pfx.
+ unfold mapOptionTree in pfx; simpl in pfx.
unfold ξ' in pfx.
- fold (mapOptionTree (update_ξ ξ ((v,(t1@@lev))::nil))) in pfx.
rewrite updating_stripped_tree_is_inert in pfx.
unfold update_ξ in pfx.
destruct (eqd_dec v v).
- eapply nd_comp; [ idtac | apply pfx ].
+ eapply nd_comp; [ idtac | apply (nd_rule pfx) ].
clear pfx.
apply e'.
assert False.
auto.
inversion H.
- destruct case_ELet; intros.
+ destruct case_ELet; intros; simpl in *.
eapply nd_comp; [ idtac | eapply nd_rule; eapply RLet ].
eapply nd_comp; [ apply nd_llecnac | idtac ].
- apply nd_prod; [ idtac | apply pf_let].
- clear pf_let.
- eapply nd_comp; [ apply pf_body | idtac ].
- clear pf_body.
+ apply nd_prod.
+ apply pf_let.
+ clear pf_let.
+ eapply nd_comp; [ apply pf_body | idtac ].
+ clear pf_body.
fold (@mapOptionTree VV).
fold (mapOptionTree ξ).
- set (update_ξ ξ ((lev,(tv @@ v))::nil)) as ξ'.
- set (arrangeContextAndWeaken lev (expr2antecedent ebody) Γ Δ [t@@v] ξ') as n.
+ set (update_ξ ξ v ((lev,tv)::nil)) as ξ'.
+ set (arrangeContextAndWeaken Γ Δ lev (expr2antecedent ebody) ξ') as n.
unfold mapOptionTree in n; simpl in n; fold (mapOptionTree ξ') in n.
unfold ξ' in n.
rewrite updating_stripped_tree_is_inert in n.
destruct (eqd_dec lev lev).
unfold ξ'.
unfold update_ξ.
- apply UND_to_ND in n.
- apply n.
+ eapply RArrange in n.
+ apply (nd_rule n).
assert False. apply n0; auto. inversion H.
destruct case_EEsc.
auto.
destruct case_ENote.
+ destruct t.
eapply nd_comp; [ idtac | eapply nd_rule; apply RNote ].
apply e'.
auto.
- destruct case_ETyApp; intros.
+ destruct case_ETyApp; simpl in *; intros.
eapply nd_comp; [ idtac | eapply nd_rule; apply RAppT ].
apply e'.
auto.
- destruct case_ECoLam; intros.
+ destruct case_ECoLam; simpl in *; intros.
eapply nd_comp; [ idtac | eapply nd_rule; apply RAbsCo with (κ:=κ) ].
apply e'.
- destruct case_ECoApp; intros.
+ destruct case_ECoApp; simpl in *; intros.
eapply nd_comp; [ idtac | eapply nd_rule; apply (@RAppCo _ _ (mapOptionTree ξ (expr2antecedent e)) _ σ₁ σ₂ σ γ l) ].
apply e'.
auto.
unfold mapOptionTree.
apply e'.
+ destruct case_leaf.
+ clear o x alts alts' e.
+ eapply nd_comp; [ apply e' | idtac ].
+ clear e'.
+ apply nd_rule.
+ apply RArrange.
+ simpl.
+ rewrite mapleaves'.
+ simpl.
+ rewrite <- mapOptionTree_compose.
+ unfold scbwv_ξ.
+ rewrite <- mapleaves'.
+ rewrite vec2list_map_list2vec.
+ unfold sac_Γ.
+ rewrite <- (scbwv_coherent scbx l ξ).
+ rewrite <- vec2list_map_list2vec.
+ rewrite mapleaves'.
+ set (@arrangeContextAndWeaken'') as q.
+ unfold scbwv_ξ.
+ set (@updating_stripped_tree_is_inert' _ (weakL' l) (weakLT' ○ ξ) (vec2list (scbwv_varstypes scbx))) as z.
+ unfold scbwv_varstypes in z.
+ rewrite vec2list_map_list2vec in z.
+ rewrite fst_zip in z.
+ rewrite <- z.
+ clear z.
+ replace (stripOutVars (vec2list (scbwv_exprvars scbx))) with
+ (stripOutVars (leaves (unleaves (vec2list (scbwv_exprvars scbx))))).
+ apply q.
+ apply (sac_Δ sac Γ atypes (weakCK'' Δ)).
+ rewrite leaves_unleaves.
+ apply (scbwv_exprvars_distinct scbx).
+ rewrite leaves_unleaves.
+ reflexivity.
+
+ destruct case_nil.
+ apply nd_id0.
+
+ destruct case_branch.
+ simpl; eapply nd_comp; [ apply nd_llecnac | idtac ].
+ apply nd_prod.
+ apply b1'.
+ apply b2'.
+
destruct case_ECase.
- unfold mapOptionTree; simpl; fold (mapOptionTree ξ).
- apply (fail "ECase not implemented").
- (*
+ set (@RCase Γ Δ l tc) as q.
+ rewrite <- case_lemma.
eapply nd_comp; [ idtac | eapply nd_rule; eapply RCase ].
eapply nd_comp; [ apply nd_llecnac | idtac ]; apply nd_prod.
rewrite <- mapOptionTree_compose.
apply dcsp.
apply e'.
- *)
-
- destruct case_elr_leaf; intros.
- assert (unlev (ξ0 v) = t0).
- apply cheat.
- set (@lrsp_leaf Γ0 Δ0 ξ0 l v) as q.
- rewrite H in q.
- apply q.
- apply e'0.
destruct case_ELetRec; intros.
- set (@letRecSubproofsToND') as q.
- simpl in q.
- apply q.
- clear q.
+ unfold ξ'0 in *.
+ clear ξ'0.
+ unfold ξ'1 in *.
+ clear ξ'1.
+ apply letRecSubproofsToND'.
+ admit.
apply e'.
apply subproofs.
- (*
- destruct case_leaf.
- unfold pcb_judg.
- simpl.
- clear mkdcsp alts0 o ecb Γ Δ ξ lev tc avars e alts u.
- repeat rewrite <- mapOptionTree_compose in *.
- set (nd_comp ecb'
- (UND_to_ND _ _ _ _ (@arrangeContextAndWeaken'' _ _ _ (unshape corevars) _ _))) as q.
- idtac.
- assert (unshape (scb_types alt) = (mapOptionTree (update_ξ''' (weakenX' ξ0) (scb_types alt) corevars) (unshape corevars))).
- apply update_ξ_and_reapply.
- rewrite H.
- simpl in q.
- unfold mapOptionTree in q; simpl in q.
- set (@updating_stripped_tree_is_inert''') as u.
- unfold mapOptionTree in u.
- rewrite u in q.
- clear u H.
- unfold weakenX' in *.
- admit.
- unfold mapOptionTree in *.
- replace
- (@weakenT' _ (sac_ekinds alt) (coreTypeToType φ tbranches0))
- with
- (coreTypeToType (updatePhi φ (sac_evars alt)) tbranches0).
- apply q.
- apply cheat.
-
- destruct case_branch.
- simpl; eapply nd_comp; [ apply nd_llecnac | idtac ].
- apply nd_prod.
- apply (mkdcsp b1).
- apply (mkdcsp b2).
- *)
-
Defined.
End HaskStrongToProof.
-(*
-
-(* Figure 7, production "decl"; actually not used in this formalization *)
-Inductive Decl :=.
-| DeclDataType : forall tc:TyCon, (forall dc:DataCon tc, DataConDecl dc) -> Decl
-| DeclTypeFunction : forall n t l, TypeFunctionDecl n t l -> Decl
-| DeclAxiom : forall n ccon vk TV, @AxiomDecl n ccon vk TV -> Decl.
-
-(* Figure 1, production "pgm" *)
-Inductive Pgm Γ Δ :=
- mkPgm : forall (τ:HaskType Γ), list Decl -> ND Rule [] [Γ>Δ> [] |- [τ @@nil]] -> Pgm Γ Δ.
-*)
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