-let basic_eval_ncoercion (name,t,s,d,p,a) status =
- let to_s =
- NCicCoercion.look_for_coercion status [] [] [] (NCic.Implicit `Type) s
- in
- let from_d =
- NCicCoercion.look_for_coercion status [] [] [] d (NCic.Implicit `Type)
- in
- let status = NCicCoercion.index_coercion status t s d a p in
- let c =
- List.find
- (function (_,NCic.Appl (x::_),_,_) -> x = t | _ -> assert false)
- (NCicCoercion.look_for_coercion status [] [] [] s d)
- in
- let composites =
- let to_s_o_c =
- product (fun (m1,t1,_,j) (mc,c,_,i) -> m1@mc,c,[i,t1],j,a)
- to_s [c]
- in
- let c_o_from_d =
- product (fun (mc,c,_,j) (m1,t1,ty,i) -> m1@mc,t1,[i,c],j,count_prod ty)
- [c] from_d
- in
- let to_s_o_c_o_from_d =
- product (fun (m1,t1,_,j) (m,t,upl,i,a)->
- m@m1,t,(i,t1)::upl,j,a)
- to_s c_o_from_d
- in
- to_s_o_c @ c_o_from_d @ to_s_o_c_o_from_d
- in
- let composites =
- HExtlib.filter_map
- (fun (metasenv, bo, upl, p, arity) ->
- try
- let metasenv, subst =
- List.fold_left
- (fun (metasenv,subst) (a,b) ->
- NCicUnification.unify status metasenv subst [] a b)
- (metasenv,[]) upl
- in
- let bo = NCicUntrusted.apply_subst subst [] bo in
- let metasenv = toposort metasenv in
- let bo = close_in_context bo metasenv in
- let pos =
- match p with
- | NCic.Meta (p,_) -> pos_in_list p (List.map fst metasenv)
- | _ -> assert false
- in
- let ty = NCicTypeChecker.typeof ~metasenv:[] ~subst:[] [] bo in
- let src,tgt = src_tgt_of_ty_cpos_arity ty pos arity in
-(*
- prerr_endline (
- NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] bo ^ " : " ^
- NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] ty ^ " as " ^
- NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] src ^ " ===> " ^
- NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] tgt ^
- " cpos=" ^ string_of_int pos ^ " arity=" ^ string_of_int arity);
-*)
- Some (bo,src,tgt,arity,pos)
- with
- | NCicTypeChecker.TypeCheckerFailure _
- | NCicUnification.UnificationFailure _
- | NCicUnification.Uncertain _ -> None
- ) composites
- in
- List.fold_left
- (fun st (t,s,d,a,p) -> NCicCoercion.index_coercion st t s d a p)
- status composites
-;;
-
-let inject_ncoercion =
- let basic_eval_ncoercion x ~refresh_uri_in_universe ~refresh_uri_in_term =
- basic_eval_ncoercion x