diff options
| author |  Gaëtan Gilbert <gaetan.gilbert@skyskimmer.net> | 2018-02-20 00:27:40 +0100 |
|---|---|---|
| committer | Gaëtan Gilbert <gaetan.gilbert@skyskimmer.net> | 2018-03-09 16:29:06 +0100 |
| commit | db0918bfa5089f9ab44374504cbd0ddc758ea1e5 (patch) | |
| tree | 5b68a2bd48fc961987a193f4361c46f7b9940b33 /engine/evarutil.mli | |
| parent | 17a0dccfe91d6f837ce285e62b8d843720f8c1a1 (diff) | |
Cumulativity: improve treatment of irrelevant universes.
In Reductionops.infer_conv we did not have enough information to
properly try to unify irrelevant universes. This requires changing the
Reduction.universe_compare type a bit.
Diffstat (limited to 'engine/evarutil.mli')
| -rw-r--r-- | engine/evarutil.mli | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/engine/evarutil.mli b/engine/evarutil.mli index 373875bd0..e289ca169 100644 --- a/engine/evarutil.mli +++ b/engine/evarutil.mli @@ -203,6 +203,20 @@ val kind_of_term_upto : evar_map -> Constr.constr -> assumed to be an extention of those in [sigma1]. *) val eq_constr_univs_test : evar_map -> evar_map -> Constr.constr -> Constr.constr -> bool +(** [compare_cumulative_instances cv_pb variance u1 u2 sigma] Returns + [Inl sigma'] where [sigma'] is [sigma] augmented with universe + constraints such that [u1 cv_pb? u2] according to [variance]. + Additionally flexible universes in irrelevant positions are unified + if possible. Returns [Inr p] when the former is impossible. *) +val compare_cumulative_instances : Reduction.conv_pb -> Univ.Variance.t array -> + Univ.Instance.t -> Univ.Instance.t -> evar_map -> + (evar_map, Univ.univ_inconsistency) Util.union + +(** We should only compare constructors at convertible types, so this + is only an opportunity to unify universes. *) +val compare_constructor_instances : evar_map -> + Univ.Instance.t -> Univ.Instance.t -> evar_map + (** {6 Removing hyps in evars'context} raise OccurHypInSimpleClause if the removal breaks dependencies *) |