diff options
Diffstat (limited to 'tactics/inv.ml')
| -rw-r--r-- | tactics/inv.ml | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/tactics/inv.ml b/tactics/inv.ml index 46b10bf33..cb0bbfd0e 100644 --- a/tactics/inv.ml +++ b/tactics/inv.ml @@ -334,6 +334,16 @@ let remember_first_eq id x = if !x == MoveLast then x := MoveAfter id If it can discriminate then the goal is proved, if not tries to use it as a rewrite rule. It erases the clause which is given as input *) +let dest_nf_eq env sigma t = match EConstr.kind sigma t with +| App (r, [| t; x; y |]) -> + let open Reductionops in + let lazy eq = Coqlib.coq_eq_ref in + if EConstr.is_global sigma eq r then + (t, whd_all env sigma x, whd_all env sigma y) + else user_err Pp.(str "Not an equality.") +| _ -> + user_err Pp.(str "Not an equality.") + let projectAndApply as_mode thin avoid id eqname names depids = let subst_hyp l2r id = tclTHEN (tclTRY(rewriteInConcl l2r (EConstr.mkVar id))) @@ -344,7 +354,7 @@ let projectAndApply as_mode thin avoid id eqname names depids = let sigma = project gl in (** We only look at the type of hypothesis "id" *) let hyp = pf_nf_evar gl (pf_get_hyp_typ id (Proofview.Goal.assume gl)) in - let (t,t1,t2) = Hipattern.dest_nf_eq gl hyp in + let (t,t1,t2) = dest_nf_eq (pf_env gl) sigma hyp in match (EConstr.kind sigma t1, EConstr.kind sigma t2) with | Var id1, _ -> generalizeRewriteIntros as_mode (subst_hyp true id) depids id1 | _, Var id2 -> generalizeRewriteIntros as_mode (subst_hyp false id) depids id2 |