diff options
Diffstat (limited to 'pretyping/indrec.ml')
| -rw-r--r-- | pretyping/indrec.ml | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/pretyping/indrec.ml b/pretyping/indrec.ml index 92573a94f..fb45be663 100644 --- a/pretyping/indrec.ml +++ b/pretyping/indrec.ml @@ -156,7 +156,7 @@ let type_rec_branch is_rec dep env sigma (vargs,depPvect,decP) tyi cs recargs = | Prod (n,t,c) -> let d = (n,None,t) in make_prod env (n,t,prec (push_rel d env) (i+1) (d::sign) c) - | LetIn (n,b,t,c) -> + | LetIn (n,b,t,c) when List.is_empty largs -> let d = (n,Some b,t) in mkLetIn (n,b,t,prec (push_rel d env) (i+1) (d::sign) c) | Ind (_,_) -> @@ -167,7 +167,10 @@ let type_rec_branch is_rec dep env sigma (vargs,depPvect,decP) tyi cs recargs = base [|applist (mkRel (i+1), Context.Rel.to_extended_list 0 sign)|] else base - | _ -> assert false + | _ -> + let t' = whd_betadeltaiota env sigma p in + if Term.eq_constr p' t' then assert false + else prec env i sign t' in prec env 0 [] in @@ -231,14 +234,17 @@ let make_rec_branch_arg env sigma (nparrec,fvect,decF) f cstr recargs = | Prod (n,t,c) -> let d = (n,None,t) in mkLambda_name env (n,t,prec (push_rel d env) (i+1) (d::hyps) c) - | LetIn (n,b,t,c) -> + | LetIn (n,b,t,c) when List.is_empty largs -> let d = (n,Some b,t) in mkLetIn (n,b,t,prec (push_rel d env) (i+1) (d::hyps) c) | Ind _ -> let realargs = List.skipn nparrec largs and arg = appvect (mkRel (i+1), Context.Rel.to_extended_vect 0 hyps) in applist(lift i fk,realargs@[arg]) - | _ -> assert false + | _ -> + let t' = whd_betadeltaiota env sigma p in + if Term.eq_constr t' p' then assert false + else prec env i hyps t' in prec env 0 [] in |