diff options
Diffstat (limited to 'tactics/leminv.ml')
| -rw-r--r-- | tactics/leminv.ml | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/tactics/leminv.ml b/tactics/leminv.ml index e798f59a..4cbfa6c2 100644 --- a/tactics/leminv.ml +++ b/tactics/leminv.ml @@ -6,7 +6,7 @@ (* * GNU Lesser General Public License Version 2.1 *) (************************************************************************) -(* $Id: leminv.ml 11897 2009-02-09 19:28:02Z barras $ *) +(* $Id: leminv.ml 13126 2010-06-13 11:09:51Z herbelin $ *) open Pp open Util @@ -291,11 +291,15 @@ let add_inversion_lemma_exn na com comsort bool tac = (* ================================= *) let lemInv id c gls = + ignore (pf_get_hyp gls id); (* ensure id exists *) try let clause = mk_clenv_type_of gls c in let clause = clenv_constrain_last_binding (mkVar id) clause in Clenvtac.res_pf clause ~allow_K:true gls with + | NoSuchBinding -> + errorlabstrm "" + (hov 0 (pr_constr c ++ spc () ++ str "does not refer to an inversion lemma.")) | UserError (a,b) -> errorlabstrm "LemInv" (str "Cannot refine current goal with the lemma " ++ |