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Commit 370c0cf4 authored by Robbert Krebbers's avatar Robbert Krebbers
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Fix compatibility with old Coq versions.

parent 2f5854bd
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    theories/finite.v
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    ......@@ -154,7 +154,7 @@ Lemma finite_bijective A `{Finite A} B `{Finite B} :
    Proof.
    split.
    - intros; destruct (proj1 (finite_inj A B)) as [f ?]; auto with lia.
    exists f; eauto using finite_inj_surj.
    exists f; split; [done|]. by apply finite_inj_surj.
    - intros (f&?&?). apply (anti_symm (≤)); apply finite_inj.
    + by exists f.
    + destruct (surj_cancel f) as (g&?). exists g. apply cancel_inj.
    ......@@ -274,7 +274,7 @@ Next Obligation.
    Qed.
    Next Obligation.
    intros ?????? [x|y]; rewrite elem_of_app, !elem_of_list_fmap;
    eauto using elem_of_enum.
    [left|right]; (eexists; split; [done|apply elem_of_enum]).
    Qed.
    Lemma sum_card `{Finite A, Finite B} : card (A + B) = card A + card B.
    Proof. unfold card. simpl. by rewrite app_length, !fmap_length. Qed.
    ......
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