diff options
Diffstat (limited to 'tactics')
| -rw-r--r-- | tactics/equality.ml | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/tactics/equality.ml b/tactics/equality.ml index fe0ca61c66..ccb0425f4a 100644 --- a/tactics/equality.ml +++ b/tactics/equality.ml @@ -205,9 +205,47 @@ let rewrite_conv_closed_unif_flags = { resolve_evars = false } +let rewrite_keyed_core_unif_flags = { + modulo_conv_on_closed_terms = Some full_transparent_state; + (* We have this flag for historical reasons, it has e.g. the consequence *) + (* to rewrite "?x+2" in "y+(1+1)=0" or to rewrite "?x+?x" in "2+(1+1)=0" *) + + use_metas_eagerly_in_conv_on_closed_terms = true; + use_evars_eagerly_in_conv_on_closed_terms = false; + (* Combined with modulo_conv_on_closed_terms, this flag allows since 8.2 *) + (* to rewrite e.g. "?x+(2+?x)" in "1+(1+2)=0" *) + + modulo_delta = full_transparent_state; + modulo_delta_types = full_transparent_state; + check_applied_meta_types = true; + use_pattern_unification = true; + (* To rewrite "?n x y" in "y+x=0" when ?n is *) + (* a preexisting evar of the goal*) + + use_meta_bound_pattern_unification = true; + + frozen_evars = Evar.Set.empty; + (* This is set dynamically *) + + restrict_conv_on_strict_subterms = false; + modulo_betaiota = true; + (* Different from conv_closed *) + modulo_eta = true; +} + +let rewrite_keyed_unif_flags = { + core_unify_flags = rewrite_keyed_core_unif_flags; + merge_unify_flags = rewrite_keyed_core_unif_flags; + subterm_unify_flags = rewrite_keyed_core_unif_flags; + allow_K_in_toplevel_higher_order_unification = false; + resolve_evars = false +} + let rewrite_elim with_evars frzevars cls c e = Proofview.Goal.enter begin fun gl -> - let flags = make_flags frzevars (Proofview.Goal.sigma gl) rewrite_conv_closed_unif_flags c in + let flags = if Unification.is_keyed_unification () + then rewrite_keyed_unif_flags else rewrite_conv_closed_unif_flags in + let flags = make_flags frzevars (Proofview.Goal.sigma gl) flags c in general_elim_clause with_evars flags cls c e end |