Commit a7ee334e authored by Robbert Krebbers's avatar Robbert Krebbers

Support `_ ∈ _ ⊎ _ ` in `set_solver`.

parent 453f5e30
......@@ -126,6 +126,14 @@ Qed.
Global Instance gmultiset_elem_of_dec : RelDecision (@{gmultiset A}).
Proof. refine (λ x X, cast_if (decide (0 < multiplicity x X))); done. Defined.
Global Instance set_unfold_gmultiset_disj_union x X Y P Q :
SetUnfold (x X) P SetUnfold (x Y) Q SetUnfold (x X Y) (P Q).
intros ??; constructor.
rewrite <-(set_unfold (x X) P), <-(set_unfold (x Y) Q).
rewrite !elem_of_multiplicity, multiplicity_disj_union. lia.
(* Algebraic laws *)
(** For union *)
Global Instance gmultiset_union_comm : Comm (=@{gmultiset A}) ().
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