open Printf
-exception RefineFailure of string;;
+type failure_msg =
+ Reason of string
+ | UnificationFailure of CicUnification.failure_msg
+
+let explain_error =
+ function
+ Reason msg -> msg
+ | UnificationFailure msg -> CicUnification.explain_error msg
+
+exception RefineFailure of failure_msg;;
exception Uncertain of string;;
exception AssertFailure of string;;
try
CicUnification.fo_unif_subst subst context metasenv t1 t2 ugraph
with
- (CicUnification.UnificationFailure msg) -> raise (RefineFailure msg)
+ (CicUnification.UnificationFailure msg) -> raise (RefineFailure (UnificationFailure msg))
| (CicUnification.Uncertain msg) -> raise (Uncertain msg)
;;
| C.CurrentProof (_,_,_,ty,_,_) -> ty,u
| _ ->
raise
- (RefineFailure ("Unknown constant definition " ^ U.string_of_uri uri))
+ (RefineFailure (Reason ("Unknown constant definition " ^ U.string_of_uri uri)))
and type_of_variable uri ugraph =
let module C = Cic in
| _ ->
raise
(RefineFailure
- ("Unknown variable definition " ^ UriManager.string_of_uri uri))
+ (Reason ("Unknown variable definition " ^ UriManager.string_of_uri uri)))
and type_of_mutual_inductive_defs uri i ugraph =
let module C = Cic in
| _ ->
raise
(RefineFailure
- ("Unknown mutual inductive definition " ^ U.string_of_uri uri))
+ (Reason ("Unknown mutual inductive definition " ^ U.string_of_uri uri)))
and type_of_mutual_inductive_constr uri i j ugraph =
let module C = Cic in
| _ ->
raise
(RefineFailure
- ("Unkown mutual inductive definition " ^ U.string_of_uri uri))
+ (Reason ("Unkown mutual inductive definition " ^ U.string_of_uri uri)))
(* type_of_aux' is just another name (with a different scope) for type_of_aux *)
(S.lift n bo) ugraph
in
t,ty,subst,metasenv,ugraph
- | None -> raise (RefineFailure "Rel to hidden hypothesis")
+ | None -> raise (RefineFailure (Reason "Rel to hidden hypothesis"))
with
- _ -> raise (RefineFailure "Not a close term")
+ _ -> raise (RefineFailure (Reason "Not a close term"))
)
| C.Var (uri,exp_named_subst) ->
let exp_named_subst',subst',metasenv',ugraph1 =
in
C.Cast (te',ty'),ty',subst''',metasenv''',ugraph3
with
- _ -> raise (RefineFailure "Cast"))
+ _ -> raise (RefineFailure (Reason "Cast")))
| C.Prod (name,s,t) ->
let s',sort1,subst',metasenv',ugraph1 =
type_of_aux subst metasenv context s ugraph
C.Meta _
| C.Sort _ -> ()
| _ ->
- raise (RefineFailure (sprintf
+ raise (RefineFailure (Reason (sprintf
"Not well-typed lambda-abstraction: the source %s should be a type;
instead it is a term of type %s" (CicPp.ppterm s)
- (CicPp.ppterm sort1)))
+ (CicPp.ppterm sort1))))
) ;
let t',type2,subst'',metasenv'',ugraph2 =
type_of_aux subst' metasenv'
hetype tlbody_and_type ugraph2
in
C.Appl (he'::tl'), applty,subst''',metasenv''',ugraph3
- | C.Appl _ -> raise (RefineFailure "Appl: no arguments")
+ | C.Appl _ -> raise (RefineFailure (Reason "Appl: no arguments"))
| C.Const (uri,exp_named_subst) ->
let exp_named_subst',subst',metasenv',ugraph1 =
check_exp_named_subst subst metasenv context
| _ ->
raise
(RefineFailure
- ("Unkown mutual inductive definition " ^
- U.string_of_uri uri))
+ (Reason ("Unkown mutual inductive definition " ^
+ U.string_of_uri uri)))
in
let rec count_prod t =
match CicReduction.whd ~subst context t with
let subst',metasenv',ugraph' =
(try
fo_unif_subst subst context metasenv t ct ugraph
- with e -> raise (RefineFailure (sprintf "The local context is not consistent with the canonical context, since %s cannot be unified with %s. Reason: %s" (CicMetaSubst.ppterm subst t) (CicMetaSubst.ppterm subst ct) (match e with AssertFailure msg -> msg | _ -> (Printexc.to_string e)))))
+ with e -> raise (RefineFailure (Reason (sprintf "The local context is not consistent with the canonical context, since %s cannot be unified with %s. Reason: %s" (CicMetaSubst.ppterm subst t) (CicMetaSubst.ppterm subst ct) (match e with AssertFailure msg -> msg | _ -> (Printexc.to_string e))))))
in
l @ [Some t],subst',metasenv',ugraph'
| Some t,Some (_,C.Decl ct) ->
(try
fo_unif_subst
subst' context metasenv' inferredty ct ugraph1
- with e -> raise (RefineFailure (sprintf "The local context is not consistent with the canonical context, since the type %s of %s cannot be unified with the expected type %s. Reason: %s" (CicMetaSubst.ppterm subst' inferredty) (CicMetaSubst.ppterm subst' t) (CicMetaSubst.ppterm subst' ct) (match e with AssertFailure msg -> msg | _ -> (Printexc.to_string e)))))
+ with e -> raise (RefineFailure (Reason (sprintf "The local context is not consistent with the canonical context, since the type %s of %s cannot be unified with the expected type %s. Reason: %s" (CicMetaSubst.ppterm subst' inferredty) (CicMetaSubst.ppterm subst' t) (CicMetaSubst.ppterm subst' ct) (match e with AssertFailure msg -> msg | _ -> (Printexc.to_string e))))))
in
l @ [Some t'], subst'',metasenv'',ugraph2
| None, Some _ ->
- raise (RefineFailure (sprintf
+ raise (RefineFailure (Reason (sprintf
"Not well typed metavariable instance %s: the local context does not instantiate an hypothesis even if the hypothesis is not restricted in the canonical context %s"
(CicMetaSubst.ppterm subst (Cic.Meta (metano, l)))
- (CicMetaSubst.ppcontext subst canonical_context)))
+ (CicMetaSubst.ppcontext subst canonical_context))))
) ([],subst,metasenv,ugraph) l lifted_canonical_context
with
Invalid_argument _ ->
raise
(RefineFailure
- (sprintf
+ (Reason (sprintf
"Not well typed metavariable instance %s: the length of the local context does not match the length of the canonical context %s"
(CicMetaSubst.ppterm subst (Cic.Meta (metano, l)))
- (CicMetaSubst.ppcontext subst canonical_context)))
+ (CicMetaSubst.ppcontext subst canonical_context))))
and check_exp_named_subst metasubst metasenv context tl ugraph =
let rec check_exp_named_subst_aux metasubst metasenv substs tl ugraph =
(match CicEnvironment.get_cooked_obj ~trust:false uri with
Cic.Variable (_,Some bo,_,_) ->
raise
- (RefineFailure
- "A variable with a body can not be explicit substituted")
+ (RefineFailure (Reason
+ "A variable with a body can not be explicit substituted"))
| Cic.Variable (_,None,_,_) -> ()
| _ ->
raise
- (RefineFailure
- ("Unkown variable definition " ^ UriManager.string_of_uri uri))
+ (RefineFailure (Reason
+ ("Unkown variable definition " ^ UriManager.string_of_uri uri)))
) ;
*)
let t',typeoft,metasubst',metasenv',ugraph2 =
fo_unif_subst
metasubst' context metasenv' typeoft typeofvar ugraph2
with _ ->
- raise (RefineFailure
+ raise (RefineFailure (Reason
("Wrong Explicit Named Substitution: " ^
CicMetaSubst.ppterm metasubst' typeoft ^
" not unifiable with " ^
- CicMetaSubst.ppterm metasubst' typeofvar))
+ CicMetaSubst.ppterm metasubst' typeofvar)))
in
(* FIXME: no mere tail recursive! *)
let exp_name_subst, metasubst''', metasenv''', ugraph4 =
in
t2'',subst,metasenv,ugraph1
| (_,_) ->
- raise (RefineFailure (sprintf
+ raise (RefineFailure (Reason (sprintf
"Two sorts were expected, found %s (that reduces to %s) and %s (that reduces to %s)"
(CicPp.ppterm t1) (CicPp.ppterm t1'') (CicPp.ppterm t2)
- (CicPp.ppterm t2'')))
+ (CicPp.ppterm t2''))))
and eat_prods subst metasenv context hetype tlbody_and_type ugraph =
let rec mk_prod metasenv context =
try
type_of_aux' metasenv context term ugraph
with
- CicUniv.UniverseInconsistency msg -> raise (RefineFailure msg)
+ CicUniv.UniverseInconsistency msg -> raise (RefineFailure (Reason msg))
(*CSC: this is a very very rough approximation; to be finished *)
let are_all_occurrences_positive uri =
Cic.Appl (Cic.MutInd (uri',_,_)::_) when uri = uri' -> ()
| Cic.MutInd (uri',_,_) when uri = uri' -> ()
| Cic.Prod (_,_,t) -> aux t
- | _ -> raise (RefineFailure "not well formed constructor type")
+ | _ -> raise (RefineFailure (Reason "not well formed constructor type"))
in
aux
(* instead of raising Uncertain, let's hope that the meta will become
a sort *)
| Cic.Meta _ -> ()
- | _ -> raise (RefineFailure "The term provided is not a type")
+ | _ -> raise (RefineFailure (Reason "The term provided is not a type"))
end;
let subst,metasenv,ugraph = fo_unif_subst [] [] metasenv boty ty' ugraph in
let bo' = CicMetaSubst.apply_subst subst bo' in
projects / helm.git / blobdiff