diff options
Diffstat (limited to 'src/Data/Setoid/Indexed.idr')
| -rw-r--r-- | src/Data/Setoid/Indexed.idr | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/Data/Setoid/Indexed.idr b/src/Data/Setoid/Indexed.idr index 7277932..db5fb07 100644 --- a/src/Data/Setoid/Indexed.idr +++ b/src/Data/Setoid/Indexed.idr @@ -40,5 +40,12 @@ public export (.index) x i = MkSetoid (x.U i) (x.relation i) (x.equivalence i) public export +(.reindex) : ISetoid b -> (f : a -> b) -> ISetoid a +(.reindex) x f = MkISetoid + (\i => x.U $ f i) + (\i => x.relation $ f i) + (\i => x.equivalence $ f i) + +public export isetoid : (a -> Type) -> ISetoid a isetoid u = MkISetoid u (\_ => Equal) (\_ => equiv) |