diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Data/Setoid/Indexed.idr | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/Data/Setoid/Indexed.idr b/src/Data/Setoid/Indexed.idr index 7277932..a04b647 100644 --- a/src/Data/Setoid/Indexed.idr +++ b/src/Data/Setoid/Indexed.idr @@ -40,5 +40,9 @@ public export (.index) x i = MkSetoid (x.U i) (x.relation i) (x.equivalence i) public export +reindex : (a -> b) -> ISetoid b -> ISetoid a +reindex f x = MkISetoid (x.U . f) (\i => x.relation $ f i) (\i => x.equivalence $ f i) + +public export isetoid : (a -> Type) -> ISetoid a isetoid u = MkISetoid u (\_ => Equal) (\_ => equiv) |