CicTypeChecker.type_of_aux' ~subst metasenv context term ugraph
with
CicTypeChecker.TypeCheckerFailure msg ->
- let msg =
- (sprintf
- "Kernel Type checking error:
+ let msg =
+ (sprintf
+ "Kernel Type checking error:
%s\n%s\ncontext=\n%s\nmetasenv=\n%s\nsubstitution=\n%s\nException:\n%s.\nToo bad."
(CicMetaSubst.ppterm subst term)
(CicMetaSubst.ppterm [] term)
let snd (_,a,_) = a in
function
Cic.Meta(n,l) as t ->
- (try
- deref subst
- (CicSubstitution.subst_meta
- l (snd (CicUtil.lookup_subst n subst)))
- with
- CicUtil.Subst_not_found _ -> t)
+ (try
+ deref subst
+ (CicSubstitution.subst_meta
+ l (snd (CicUtil.lookup_subst n subst)))
+ with
+ CicUtil.Subst_not_found _ -> t)
| t -> t
;; *)
let snd (_,a,_) = a in
match t with
Cic.Meta(n,l) ->
- (try
- deref subst
- (CicSubstitution.subst_meta
- l (snd (CicUtil.lookup_subst n subst)))
- with
- CicUtil.Subst_not_found _ -> t)
+ (try
+ deref subst
+ (CicSubstitution.subst_meta
+ l (snd (CicUtil.lookup_subst n subst)))
+ with
+ CicUtil.Subst_not_found _ -> t)
| Cic.Appl(Cic.Meta(n,l)::args) ->
- (match deref subst (Cic.Meta(n,l)) with
- | Cic.Lambda _ as t ->
- deref subst (beta_reduce (Cic.Appl(t::args)))
- | r -> Cic.Appl(r::args))
+ (match deref subst (Cic.Meta(n,l)) with
+ | Cic.Lambda _ as t ->
+ deref subst (beta_reduce (Cic.Appl(t::args)))
+ | r -> Cic.Appl(r::args))
+ | Cic.Appl(((Cic.Lambda _) as t)::args) ->
+ deref subst (beta_reduce (Cic.Appl(t::args)))
| t -> t
;;
in
subst,metasenv,C.Var (uri,exp_named_subst'),ugraph1
| C.Meta (i,l) ->
- (* andrea: in general, beta_expand can create badly typed
+ (* andrea: in general, beta_expand can create badly typed
terms. This happens quite seldom in practice, UNLESS we
iterate on the local context. For this reason, we renounce
to iterate and just lift *)
let l =
- List.map
- (function
- Some t -> Some (CicSubstitution.lift 1 t)
- | None -> None) l in
- subst, metasenv, C.Meta (i,l), ugraph
+ List.map
+ (function
+ Some t -> Some (CicSubstitution.lift 1 t)
+ | None -> None) l in
+ subst, metasenv, C.Meta (i,l), ugraph
| C.Sort _
| C.Implicit _ as t -> subst,metasenv,t,ugraph
| C.Cast (te,ty) ->
aux metasenv subst n context s ugraph in
let subst,metasenv,t',ugraph2 =
aux metasenv subst (n+1) ((Some (nn, C.Decl s))::context) t
- ugraph1
+ ugraph1
in
(* TASSI: sure this is in serial? *)
subst,metasenv,(C.Prod (nn, s', t')),ugraph2
in
C.Fix (i, substitutedfl)
*)
- subst,metasenv,(CicSubstitution.lift 1 t' ),ugraph
+ subst,metasenv,(CicSubstitution.lift 1 t' ),ugraph
| C.CoFix (i,fl) ->
(*CSC: not implemented
let tylen = List.length fl in
C.CoFix (i, substitutedfl)
*)
- subst,metasenv,(CicSubstitution.lift 1 t'), ugraph
+ subst,metasenv,(CicSubstitution.lift 1 t'), ugraph
and aux_exp_named_subst metasenv subst n context ens ugraph =
List.fold_right
List.fold_right
(fun arg (subst,metasenv,t,ugraph) ->
let subst,metasenv,t,ugraph1 =
- beta_expand test_equality_only
- metasenv subst context t arg ugraph
- in
+ beta_expand test_equality_only
+ metasenv subst context t arg ugraph
+ in
subst,metasenv,t,ugraph1
) args (subst,metasenv,t,ugraph)
in
else
match (t1, t2) with
| (C.Meta (n,ln), C.Meta (m,lm)) when n=m ->
- let _,subst,metasenv,ugraph1 =
- (try
+ let _,subst,metasenv,ugraph1 =
+ (try
List.fold_left2
- (fun (j,subst,metasenv,ugraph) t1 t2 ->
- match t1,t2 with
- None,_
- | _,None -> j+1,subst,metasenv,ugraph
- | Some t1', Some t2' ->
- (* First possibility: restriction *)
- (* Second possibility: unification *)
- (* Third possibility: convertibility *)
- let b, ugraph1 =
- R.are_convertible
- ~subst ~metasenv context t1' t2' ugraph
- in
- if b then
- j+1,subst,metasenv, ugraph1
- else
- (try
- let subst,metasenv,ugraph2 =
- fo_unif_subst
- test_equality_only
- subst context metasenv t1' t2' ugraph
- in
- j+1,subst,metasenv,ugraph2
- with
- Uncertain _
- | UnificationFailure _ ->
+ (fun (j,subst,metasenv,ugraph) t1 t2 ->
+ match t1,t2 with
+ None,_
+ | _,None -> j+1,subst,metasenv,ugraph
+ | Some t1', Some t2' ->
+ (* First possibility: restriction *)
+ (* Second possibility: unification *)
+ (* Third possibility: convertibility *)
+ let b, ugraph1 =
+ R.are_convertible
+ ~subst ~metasenv context t1' t2' ugraph
+ in
+ if b then
+ j+1,subst,metasenv, ugraph1
+ else
+ (try
+ let subst,metasenv,ugraph2 =
+ fo_unif_subst
+ test_equality_only
+ subst context metasenv t1' t2' ugraph
+ in
+ j+1,subst,metasenv,ugraph2
+ with
+ Uncertain _
+ | UnificationFailure _ ->
debug_print ("restringo Meta n." ^ (string_of_int n) ^ "on variable n." ^ (string_of_int j));
- let metasenv, subst =
- CicMetaSubst.restrict
- subst [(n,j)] metasenv in
- j+1,subst,metasenv,ugraph1)
- ) (1,subst,metasenv,ugraph) ln lm
- with
- Exit ->
- raise
- (UnificationFailure "1")
- (*
- (sprintf
- "Error trying to unify %s with %s: the algorithm tried to check whether the two substitutions are convertible; if they are not, it tried to unify the two substitutions. No restriction was attempted."
- (CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2))) *)
- | Invalid_argument _ ->
- raise
- (UnificationFailure "2"))
- (*
- (sprintf
- "Error trying to unify %s with %s: the lengths of the two local contexts do not match."
- (CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2)))) *)
- in subst,metasenv,ugraph1
+ let metasenv, subst =
+ CicMetaSubst.restrict
+ subst [(n,j)] metasenv in
+ j+1,subst,metasenv,ugraph1)
+ ) (1,subst,metasenv,ugraph) ln lm
+ with
+ Exit ->
+ raise
+ (UnificationFailure "1")
+ (*
+ (sprintf
+ "Error trying to unify %s with %s: the algorithm tried to check whether the two substitutions are convertible; if they are not, it tried to unify the two substitutions. No restriction was attempted."
+ (CicMetaSubst.ppterm subst t1)
+ (CicMetaSubst.ppterm subst t2))) *)
+ | Invalid_argument _ ->
+ raise
+ (UnificationFailure "2"))
+ (*
+ (sprintf
+ "Error trying to unify %s with %s: the lengths of the two local contexts do not match."
+ (CicMetaSubst.ppterm subst t1)
+ (CicMetaSubst.ppterm subst t2)))) *)
+ in subst,metasenv,ugraph1
| (C.Meta (n,_), C.Meta (m,_)) when n>m ->
- fo_unif_subst test_equality_only subst context metasenv t2 t1 ugraph
+ fo_unif_subst test_equality_only subst context metasenv t2 t1 ugraph
| (C.Meta (n,l), t)
| (t, C.Meta (n,l)) ->
- let swap =
+ let swap =
match t1,t2 with
C.Meta (n,_), C.Meta (m,_) when n < m -> false
| _, C.Meta _ -> false
| _,_ -> true
- in
- let lower = fun x y -> if swap then y else x in
- let upper = fun x y -> if swap then x else y in
- let fo_unif_subst_ordered
+ in
+ let lower = fun x y -> if swap then y else x in
+ let upper = fun x y -> if swap then x else y in
+ let fo_unif_subst_ordered
test_equality_only subst context metasenv m1 m2 ugraph =
fo_unif_subst test_equality_only subst context metasenv
(lower m1 m2) (upper m1 m2) ugraph
- in
+ in
begin
let subst,metasenv,ugraph1 =
let (_,_,meta_type) = CicUtil.lookup_meta n metasenv in
(try
let tyt,ugraph1 =
- type_of_aux' metasenv subst context t ugraph
- in
- fo_unif_subst
- test_equality_only
- subst context metasenv tyt (S.subst_meta l meta_type) ugraph1
+ type_of_aux' metasenv subst context t ugraph
+ in
+ fo_unif_subst
+ test_equality_only
+ subst context metasenv tyt (S.subst_meta l meta_type) ugraph1
with
- UnificationFailure msg
- | Uncertain msg ->
- (* debug_print msg; *)raise (UnificationFailure msg)
+ UnificationFailure msg
+ | Uncertain msg ->
+ (* debug_print msg; *)raise (UnificationFailure msg)
| AssertFailure _ ->
- debug_print "siamo allo huge hack";
- (* TODO huge hack!!!!
- * we keep on unifying/refining in the hope that
- * the problem will be eventually solved.
- * In the meantime we're breaking a big invariant:
- * the terms that we are unifying are no longer well
- * typed in the current context (in the worst case
- * we could even diverge) *)
- (subst, metasenv,ugraph)) in
- let t',metasenv,subst =
- try
- CicMetaSubst.delift n subst context metasenv l t
- with
- (CicMetaSubst.MetaSubstFailure msg)->
- raise (UnificationFailure msg)
- | (CicMetaSubst.Uncertain msg) -> raise (Uncertain msg)
- in
- let t'',ugraph2 =
- match t' with
- C.Sort (C.Type u) when not test_equality_only ->
- let u' = CicUniv.fresh () in
- let s = C.Sort (C.Type u') in
- let ugraph2 =
- CicUniv.add_ge (upper u u') (lower u u') ugraph1
- in
- s,ugraph2
- | _ -> t',ugraph1
- in
- (* Unifying the types may have already instantiated n. Let's check *)
- try
- let (_, oldt,_) = CicUtil.lookup_subst n subst in
- let lifted_oldt = S.subst_meta l oldt in
- fo_unif_subst_ordered
- test_equality_only subst context metasenv t lifted_oldt ugraph2
- with
- CicUtil.Subst_not_found _ ->
- let (_, context, ty) = CicUtil.lookup_meta n metasenv in
- let subst = (n, (context, t'',ty)) :: subst in
- let metasenv =
- List.filter (fun (m,_,_) -> not (n = m)) metasenv in
- subst, metasenv, ugraph2
- end
+ debug_print "siamo allo huge hack";
+ (* TODO huge hack!!!!
+ * we keep on unifying/refining in the hope that
+ * the problem will be eventually solved.
+ * In the meantime we're breaking a big invariant:
+ * the terms that we are unifying are no longer well
+ * typed in the current context (in the worst case
+ * we could even diverge) *)
+ (subst, metasenv,ugraph)) in
+ let t',metasenv,subst =
+ try
+ CicMetaSubst.delift n subst context metasenv l t
+ with
+ (CicMetaSubst.MetaSubstFailure msg)->
+ raise (UnificationFailure msg)
+ | (CicMetaSubst.Uncertain msg) -> raise (Uncertain msg)
+ in
+ let t'',ugraph2 =
+ match t' with
+ C.Sort (C.Type u) when not test_equality_only ->
+ let u' = CicUniv.fresh () in
+ let s = C.Sort (C.Type u') in
+ let ugraph2 =
+ CicUniv.add_ge (upper u u') (lower u u') ugraph1
+ in
+ s,ugraph2
+ | _ -> t',ugraph1
+ in
+ (* Unifying the types may have already instantiated n. Let's check *)
+ try
+ let (_, oldt,_) = CicUtil.lookup_subst n subst in
+ let lifted_oldt = S.subst_meta l oldt in
+ fo_unif_subst_ordered
+ test_equality_only subst context metasenv t lifted_oldt ugraph2
+ with
+ CicUtil.Subst_not_found _ ->
+ let (_, context, ty) = CicUtil.lookup_meta n metasenv in
+ let subst = (n, (context, t'',ty)) :: subst in
+ let metasenv =
+ List.filter (fun (m,_,_) -> not (n = m)) metasenv in
+ subst, metasenv, ugraph2
+ end
| (C.Var (uri1,exp_named_subst1),C.Var (uri2,exp_named_subst2))
| (C.Const (uri1,exp_named_subst1),C.Const (uri2,exp_named_subst2)) ->
if UriManager.eq uri1 uri2 then
exp_named_subst1 exp_named_subst2 ugraph
else
raise (UnificationFailure "3")
- (* (sprintf
+ (* (sprintf
"Can't unify %s with %s due to different constants"
(CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2))) *)
+ (CicMetaSubst.ppterm subst t2))) *)
| C.MutInd (uri1,i1,exp_named_subst1),C.MutInd (uri2,i2,exp_named_subst2) ->
if UriManager.eq uri1 uri2 && i1 = i2 then
- fo_unif_subst_exp_named_subst
- test_equality_only
- subst context metasenv exp_named_subst1 exp_named_subst2 ugraph
+ fo_unif_subst_exp_named_subst
+ test_equality_only
+ subst context metasenv exp_named_subst1 exp_named_subst2 ugraph
else
- raise (UnificationFailure "4")
+ raise (UnificationFailure "4")
(* (sprintf
"Can't unify %s with %s due to different inductive principles"
(CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2))) *)
+ (CicMetaSubst.ppterm subst t2))) *)
| C.MutConstruct (uri1,i1,j1,exp_named_subst1),
C.MutConstruct (uri2,i2,j2,exp_named_subst2) ->
if UriManager.eq uri1 uri2 && i1 = i2 && j1 = j2 then
- fo_unif_subst_exp_named_subst
- test_equality_only
- subst context metasenv exp_named_subst1 exp_named_subst2 ugraph
+ fo_unif_subst_exp_named_subst
+ test_equality_only
+ subst context metasenv exp_named_subst1 exp_named_subst2 ugraph
else
- raise (UnificationFailure "5")
- (* (sprintf
+ raise (UnificationFailure "5")
+ (* (sprintf
"Can't unify %s with %s due to different inductive constructors"
(CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2))) *)
+ (CicMetaSubst.ppterm subst t2))) *)
| (C.Implicit _, _) | (_, C.Implicit _) -> assert false
| (C.Cast (te,ty), t2) -> fo_unif_subst test_equality_only
subst context metasenv te t2 ugraph
let subst',metasenv',ugraph1 =
fo_unif_subst true subst context metasenv s1 s2 ugraph
in
- fo_unif_subst test_equality_only
+ fo_unif_subst test_equality_only
subst' ((Some (n1,(C.Decl s1)))::context) metasenv' t1 t2 ugraph1
| (C.Lambda (n1,s1,t1), C.Lambda (_,s2,t2)) ->
let subst',metasenv',ugraph1 =
fo_unif_subst test_equality_only subst context metasenv s1 s2 ugraph
in
- fo_unif_subst test_equality_only
- subst' ((Some (n1,(C.Decl s1)))::context) metasenv' t1 t2 ugraph1
+ fo_unif_subst test_equality_only
+ subst' ((Some (n1,(C.Decl s1)))::context) metasenv' t1 t2 ugraph1
| (C.LetIn (_,s1,t1), t2)
| (t2, C.LetIn (_,s1,t1)) ->
fo_unif_subst
test_equality_only subst context metasenv t2 (S.subst s1 t1) ugraph
| (C.Appl l1, C.Appl l2) ->
(* andrea: this case should be probably rewritten in the
- spirit of deref *)
+ spirit of deref *)
(match l1,l2 with
| C.Meta (i,_)::args1, C.Meta (j,_)::args2 when i = j ->
- (try
- List.fold_left2
- (fun (subst,metasenv,ugraph) t1 t2 ->
- fo_unif_subst
- test_equality_only subst context metasenv t1 t2 ugraph)
- (subst,metasenv,ugraph) l1 l2
- with (Invalid_argument msg) ->
- raise (UnificationFailure msg))
+ (try
+ List.fold_left2
+ (fun (subst,metasenv,ugraph) t1 t2 ->
+ fo_unif_subst
+ test_equality_only subst context metasenv t1 t2 ugraph)
+ (subst,metasenv,ugraph) l1 l2
+ with (Invalid_argument msg) ->
+ raise (UnificationFailure msg))
| C.Meta (i,l)::args, _ when not(exists_a_meta args) ->
- (* we verify that none of the args is a Meta,
+ (* we verify that none of the args is a Meta,
since beta expanding with respoect to a metavariable
makes no sense *)
(*
(try
- let (_,t,_) = CicUtil.lookup_subst i subst in
- let lifted = S.subst_meta l t in
- let reduced = beta_reduce (Cic.Appl (lifted::args)) in
- fo_unif_subst
- test_equality_only
- subst context metasenv reduced t2 ugraph
- with CicUtil.Subst_not_found _ -> *)
- let subst,metasenv,beta_expanded,ugraph1 =
- beta_expand_many
- test_equality_only metasenv subst context t2 args ugraph
- in
+ let (_,t,_) = CicUtil.lookup_subst i subst in
+ let lifted = S.subst_meta l t in
+ let reduced = beta_reduce (Cic.Appl (lifted::args)) in
+ fo_unif_subst
+ test_equality_only
+ subst context metasenv reduced t2 ugraph
+ with CicUtil.Subst_not_found _ -> *)
+ let subst,metasenv,beta_expanded,ugraph1 =
+ beta_expand_many
+ test_equality_only metasenv subst context t2 args ugraph
+ in
fo_unif_subst test_equality_only subst context metasenv
- (C.Meta (i,l)) beta_expanded ugraph1
+ (C.Meta (i,l)) beta_expanded ugraph1
| _, C.Meta (i,l)::args when not(exists_a_meta args) ->
(* (try
- let (_,t,_) = CicUtil.lookup_subst i subst in
- let lifted = S.subst_meta l t in
- let reduced = beta_reduce (Cic.Appl (lifted::args)) in
- fo_unif_subst
- test_equality_only
- subst context metasenv t1 reduced ugraph
- with CicUtil.Subst_not_found _ -> *)
- let subst,metasenv,beta_expanded,ugraph1 =
- beta_expand_many
- test_equality_only
- metasenv subst context t1 args ugraph in
- fo_unif_subst test_equality_only subst context metasenv
- (C.Meta (i,l)) beta_expanded ugraph1
+ let (_,t,_) = CicUtil.lookup_subst i subst in
+ let lifted = S.subst_meta l t in
+ let reduced = beta_reduce (Cic.Appl (lifted::args)) in
+ fo_unif_subst
+ test_equality_only
+ subst context metasenv t1 reduced ugraph
+ with CicUtil.Subst_not_found _ -> *)
+ let subst,metasenv,beta_expanded,ugraph1 =
+ beta_expand_many
+ test_equality_only
+ metasenv subst context t1 args ugraph
+ in
+ fo_unif_subst test_equality_only subst context metasenv
+ (C.Meta (i,l)) beta_expanded ugraph1
| _,_ ->
- let lr1 = List.rev l1 in
+ let lr1 = List.rev l1 in
let lr2 = List.rev l2 in
let rec
- fo_unif_l test_equality_only subst metasenv (l1,l2) ugraph =
+ fo_unif_l test_equality_only subst metasenv (l1,l2) ugraph =
match (l1,l2) with
[],_
| _,[] -> assert false
| ([h1],[h2]) ->
fo_unif_subst
- test_equality_only subst context metasenv h1 h2 ugraph
+ test_equality_only subst context metasenv h1 h2 ugraph
| ([h],l)
| (l,[h]) ->
fo_unif_subst test_equality_only subst context metasenv
- h (C.Appl (List.rev l)) ugraph
+ h (C.Appl (List.rev l)) ugraph
| ((h1::l1),(h2::l2)) ->
let subst', metasenv',ugraph1 =
- fo_unif_subst
- test_equality_only
- subst context metasenv h1 h2 ugraph
+ fo_unif_subst
+ test_equality_only
+ subst context metasenv h1 h2 ugraph
in
- fo_unif_l
- test_equality_only subst' metasenv' (l1,l2) ugraph1
+ fo_unif_l
+ test_equality_only subst' metasenv' (l1,l2) ugraph1
in
- fo_unif_l
- test_equality_only subst metasenv (lr1, lr2) ugraph)
+ fo_unif_l
+ test_equality_only subst metasenv (lr1, lr2) ugraph)
| (C.MutCase (_,_,outt1,t1',pl1), C.MutCase (_,_,outt2,t2',pl2))->
let subst', metasenv',ugraph1 =
fo_unif_subst test_equality_only subst context metasenv outt1 outt2
List.fold_left2
(fun (subst,metasenv,ugraph) t1 t2 ->
fo_unif_subst
- test_equality_only subst context metasenv t1 t2 ugraph
+ test_equality_only subst context metasenv t1 t2 ugraph
) (subst'',metasenv'',ugraph2) pl1 pl2
with
Invalid_argument _ ->
raise (UnificationFailure "6"))
(* (sprintf
"Error trying to unify %s with %s: the number of branches is not the same."
- (CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2)))) *)
+ (CicMetaSubst.ppterm subst t1)
+ (CicMetaSubst.ppterm subst t2)))) *)
| (C.Rel _, _) | (_, C.Rel _) ->
if t1 = t2 then
subst, metasenv,ugraph
(* (sprintf
"Can't unify %s with %s because they are not convertible"
(CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2))) *)
+ (CicMetaSubst.ppterm subst t2))) *)
| (C.Sort _ ,_) | (_, C.Sort _)
| (C.Const _, _) | (_, C.Const _)
| (C.MutInd _, _) | (_, C.MutInd _)
if t1 = t2 then
subst, metasenv, ugraph
else
- let b,ugraph1 =
- R.are_convertible ~subst ~metasenv context t1 t2 ugraph
- in
- if b then
- subst, metasenv, ugraph1
- else
+ let b,ugraph1 =
+ R.are_convertible ~subst ~metasenv context t1 t2 ugraph
+ in
+ if b then
+ subst, metasenv, ugraph1
+ else
raise (* (UnificationFailure "7") *)
(UnificationFailure (sprintf
- "Can't unify %s with %s because they are not convertible"
- (CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2)))
+ "Can't unify %s with %s because they are not convertible"
+ (CicMetaSubst.ppterm subst t1)
+ (CicMetaSubst.ppterm subst t2)))
| (C.Appl (C.Meta(i,l)::args),t2) when not(exists_a_meta args) ->
let subst,metasenv,beta_expanded,ugraph1 =
- beta_expand_many
- test_equality_only metasenv subst context t2 args ugraph
+ beta_expand_many
+ test_equality_only metasenv subst context t2 args ugraph
in
fo_unif_subst test_equality_only subst context metasenv
- (C.Meta (i,l)) beta_expanded ugraph1
+ (C.Meta (i,l)) beta_expanded ugraph1
| (t1,C.Appl (C.Meta(i,l)::args)) when not(exists_a_meta args) ->
let subst,metasenv,beta_expanded,ugraph1 =
- beta_expand_many
- test_equality_only metasenv subst context t1 args ugraph
+ beta_expand_many
+ test_equality_only metasenv subst context t1 args ugraph
in
fo_unif_subst test_equality_only subst context metasenv
- beta_expanded (C.Meta (i,l)) ugraph1
+ beta_expanded (C.Meta (i,l)) ugraph1
| (C.Prod _, t2) ->
let t2' = R.whd ~subst context t2 in
(match t2' with
- C.Prod _ ->
- fo_unif_subst test_equality_only
- subst context metasenv t1 t2' ugraph
- | _ -> raise (UnificationFailure "8"))
+ C.Prod _ ->
+ fo_unif_subst test_equality_only
+ subst context metasenv t1 t2' ugraph
+ | _ -> raise (UnificationFailure "8"))
| (t1, C.Prod _) ->
let t1' = R.whd ~subst context t1 in
(match t1' with
- C.Prod _ ->
- fo_unif_subst test_equality_only
- subst context metasenv t1' t2 ugraph
- | _ -> raise (UnificationFailure "9"))
- (* raise
- (UnificationFailure (sprintf
- "Can't unify %s with %s because they are not convertible"
- (CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2))))*)
+ C.Prod _ ->
+ fo_unif_subst test_equality_only
+ subst context metasenv t1' t2 ugraph
+ | _ -> (* raise (UnificationFailure "9")) *)
+ raise
+ (UnificationFailure (sprintf
+ "Can't unify %s with %s because they are not convertible"
+ (CicMetaSubst.ppterm subst t1)
+ (CicMetaSubst.ppterm subst t2))))
| (_,_) ->
let b,ugraph1 =
- R.are_convertible ~subst ~metasenv context t1 t2 ugraph
+ R.are_convertible ~subst ~metasenv context t1 t2 ugraph
in
- if b then
+ if b then
subst, metasenv, ugraph1
- else
- raise (UnificationFailure "10")
+ else
+ raise (UnificationFailure "10")
(* (sprintf
- "Can't unify %s with %s because they are not convertible"
- (CicMetaSubst.ppterm subst t1)
- (CicMetaSubst.ppterm subst t2))) *)
+ "Can't unify %s with %s because they are not convertible"
+ (CicMetaSubst.ppterm subst t1)
+ (CicMetaSubst.ppterm subst t2))) *)
and fo_unif_subst_exp_named_subst test_equality_only subst context metasenv
exp_named_subst1 exp_named_subst2 ugraph
projects / helm.git / commitdiff