diff options
Diffstat (limited to 'theories/FSets/FSetAVL.v')
| -rw-r--r-- | theories/FSets/FSetAVL.v | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/theories/FSets/FSetAVL.v b/theories/FSets/FSetAVL.v index 6a1e07185..10e06711f 100644 --- a/theories/FSets/FSetAVL.v +++ b/theories/FSets/FSetAVL.v @@ -1881,6 +1881,14 @@ Module IntMake (I:Int)(X: OrderedType) <: S with Module E := X. destruct Raw.compare; intros; [apply EQ|apply LT|apply GT]; red; auto. Defined. + Definition eq_dec (s s':t) : { eq s s' } + { ~ eq s s' }. + Proof. + intros (s,b) (s',b'); unfold eq; simpl. + case_eq (Raw.equal s s'); intro H; [left|right]. + apply equal_2; auto. + intro H'; rewrite equal_1 in H; auto; discriminate. + Defined. + (* specs *) Section Specs. Variable s s' s'': t. |