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Diffstat (limited to 'backend/Locations.v')
| -rw-r--r-- | backend/Locations.v | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/backend/Locations.v b/backend/Locations.v index 1270e1d3..8a0b5ea2 100644 --- a/backend/Locations.v +++ b/backend/Locations.v @@ -280,6 +280,15 @@ Module Loc. apply overlap_aux_false_1. exact H0. Qed. + Definition diff_dec (l1 l2: loc) : { Loc.diff l1 l2 } + {~Loc.diff l1 l2}. + Proof. + intros. case (eq l1 l2); intros. + right. rewrite e. apply same_not_diff. + case_eq (overlap l1 l2); intros. + right. apply overlap_not_diff; auto. + left. apply non_overlap_diff; auto. + Qed. + (** We now redefine some standard notions over lists, using the [Loc.diff] predicate instead of standard disequality [<>]. |