diff options
Diffstat (limited to 'theories/Program/Subset.v')
| -rw-r--r-- | theories/Program/Subset.v | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/theories/Program/Subset.v b/theories/Program/Subset.v index ca4002d7f4..dda0ed68d6 100644 --- a/theories/Program/Subset.v +++ b/theories/Program/Subset.v @@ -79,14 +79,14 @@ Qed. (* Somewhat trivial definition, but not unfolded automatically hence we can match on [match_eq ?A ?B ?x ?f] in tactics. *) -Definition match_eq (A B : Type) (x : A) (fn : forall (y : A | y = x), B) : B := +Definition match_eq (A B : Type) (x : A) (fn : {y : A | y = x} -> B) : B := fn (exist _ x eq_refl). (* This is what we want to be able to do: replace the originaly matched object by a new, propositionally equal one. If [fn] works on [x] it should work on any [y | y = x]. *) -Lemma match_eq_rewrite : forall (A B : Type) (x : A) (fn : forall (y : A | y = x), B) - (y : A | y = x), +Lemma match_eq_rewrite : forall (A B : Type) (x : A) (fn : {y : A | y = x} -> B) + (y : {y:A | y = x}), match_eq A B x fn = fn y. Proof. intros. |