(match l1, l2 with
| (((Cic.Const (uri1, ens1)) as c1) :: tl1),
(((Cic.Const (uri2, ens2)) as c2) :: tl2) when
- CoercGraph.is_a_coercion c1 &&
- CoercGraph.is_a_coercion c2 &&
+ CoercDb.is_a_coercion' c1 &&
+ CoercDb.is_a_coercion' c2 &&
not (UriManager.eq uri1 uri2) ->
- let body1, attrs1, ugraph =
- match CicEnvironment.get_obj ugraph uri1 with
- | Cic.Constant (_,Some bo, _, _, attrs),u -> bo,attrs,u
- | _ -> assert false
- in
- let body2, attrs2, ugraph =
- match CicEnvironment.get_obj ugraph uri2 with
- | Cic.Constant (_,Some bo, _, _, attrs),u -> bo, attrs,u
- | _ -> assert false
- in
- let is_composite1 =
- List.exists
- (function `Class (`Coercion _) -> true | _-> false)
- attrs1
- in
- let is_composite2 =
- List.exists
- (function `Class (`Coercion _) -> true | _-> false)
- attrs2
- in
- (match is_composite1, is_composite2 with
- | false, false -> raise exn
- | true, false ->
- let body1 = CicSubstitution.subst_vars ens1 body1 in
- let appl = Cic.Appl (body1::tl1) in
- let redappl = CicReduction.head_beta_reduce appl in
- fo_unif_subst
- test_equality_only subst context metasenv
- redappl t2 ugraph
- | false, true ->
- let body2 = CicSubstitution.subst_vars ens2 body2 in
- let appl = Cic.Appl (body2::tl2) in
- let redappl = CicReduction.head_beta_reduce appl in
- fo_unif_subst
- test_equality_only subst context metasenv
- t1 redappl ugraph
- | true, true ->
- let body1 = CicSubstitution.subst_vars ens1 body1 in
- let appl1 = Cic.Appl (body1::tl1) in
- let redappl1 = CicReduction.head_beta_reduce appl1 in
- let body2 = CicSubstitution.subst_vars ens2 body2 in
- let appl2 = Cic.Appl (body2::tl2) in
- let redappl2 = CicReduction.head_beta_reduce appl2 in
- fo_unif_subst
- test_equality_only subst context metasenv
- redappl1 redappl2 ugraph)
+(*DEBUGGING ONLY:
+prerr_endline ("<<<< " ^ CicMetaSubst.ppterm_in_context ~metasenv subst (C.Appl l1) context ^ " <==> " ^ CicMetaSubst.ppterm_in_context ~metasenv subst (C.Appl l2) context);
+let res =
+*)
+ let rec look_for_first_coercion c tl =
+ match
+ CicMetaSubst.apply_subst subst (HExtlib.list_last tl)
+ with
+ Cic.Appl ((Cic.Const (uri1,ens1) as c')::tl')
+ when CoercDb.is_a_coercion' c' ->
+ look_for_first_coercion c' tl'
+ | last_tl -> c,last_tl
+ in
+ let c1,last_tl1 = look_for_first_coercion c1 tl1 in
+ let c2,last_tl2 = look_for_first_coercion c2 tl2 in
+ let car1 =
+ CoercDb.coerc_carr_of_term (CoercGraph.source_of c1) in
+ let car2 =
+ CoercDb.coerc_carr_of_term (CoercGraph.source_of c2) in
+ if CoercDb.eq_carr car1 car2 then
+ (match last_tl1,last_tl2 with
+ C.Meta (i1,_),C.Meta(i2,_) when i1=i2 -> raise exn
+ | C.Meta _, _
+ | _, C.Meta _ ->
+ let subst,metasenv,ugraph =
+ fo_unif_subst test_equality_only subst context
+ metasenv last_tl1 last_tl2 ugraph
+ in
+ fo_unif_subst test_equality_only subst context
+ metasenv (C.Appl l1) (C.Appl l2) ugraph
+ | _ -> raise exn)
+ else
+ let meets = CoercGraph.meets car1 car2 in
+ (match meets with
+ | [] -> raise exn
+ | _::_::_ ->
+prerr_endline ("1: NON DOVEVA SUCCEDERE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+assert false
+ | [m] ->
+ let last_tl1',(subst,metasenv,ugraph) =
+ match last_tl1 with
+ | Cic.Meta (i1,l1)
+ when not (CoercDb.eq_carr m car1) ->
+ (match
+ CoercGraph.look_for_coercion' metasenv subst
+ context m car1
+ with
+ | CoercGraph.SomeCoercion [metasenv,last,coerced]
+ ->
+ last,
+ fo_unif_subst test_equality_only subst context
+ metasenv coerced last_tl1 ugraph
+ | _ ->
+prerr_endline ("2: NON DOVEVA SUCCEDERE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+assert false)
+ | _ -> last_tl1,(subst,metasenv,ugraph) in
+ let last_tl2',(subst,metasenv,ugraph) =
+ match last_tl2 with
+ Cic.Meta (i2,l2) when not (CoercDb.eq_carr m car2) ->
+ (match
+ CoercGraph.look_for_coercion' metasenv subst
+ context m car2
+ with
+ | CoercGraph.SomeCoercion [metasenv,last,coerced]
+ ->
+ last,
+ fo_unif_subst test_equality_only subst context
+ metasenv coerced last_tl2 ugraph
+ | _ ->
+prerr_endline ("3: NON DOVEVA SUCCEDERE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
+assert false)
+ | _ -> last_tl2,(subst,metasenv,ugraph)
+ in
+(*DEBUGGING ONLY:
+prerr_endline ("OK " ^ CicMetaSubst.ppterm_in_context ~metasenv subst last_tl1' context ^ " <==> " ^ CicMetaSubst.ppterm_in_context ~metasenv subst last_tl2' context);
+*)
+ let subst,metasenv,ugraph =
+ fo_unif_subst test_equality_only subst context
+ metasenv last_tl1' last_tl2' ugraph
+ in
+ fo_unif_subst test_equality_only subst context
+ metasenv (C.Appl l1) (C.Appl l2) ugraph)
+(*DEBUGGING ONLY:
+in
+let subst,metasenv,ugraph = res in
+prerr_endline (">>>> " ^ CicMetaSubst.ppterm_in_context ~metasenv subst (C.Appl l1) context ^ " <==> " ^ CicMetaSubst.ppterm_in_context ~metasenv subst (C.Appl l2) context);
+res
+*)
(*CSC: This is necessary because of the "elim H" tactic
where the type of H is only reducible to an
inductive type. This could be extended from inductive
projects / helm.git / blobdiff