From d6a3893ac4c77accc497b51eb47597744e1a1c84 Mon Sep 17 00:00:00 2001
From: Greg Brown <greg.brown01@ed.ac.uk>
Date: Tue, 29 Nov 2022 14:37:16 +0000
Subject: Add conversions between indexed setoids.

---
 src/Data/Setoid/Indexed.idr | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src')

diff --git a/src/Data/Setoid/Indexed.idr b/src/Data/Setoid/Indexed.idr
index df5606d..7277932 100644
--- a/src/Data/Setoid/Indexed.idr
+++ b/src/Data/Setoid/Indexed.idr
@@ -31,6 +31,14 @@ record ISetoid (a : Type) where
   0 relation  : IRel U
   equivalence : IEquivalence U relation
 
+public export
+fromIndexed : (a -> Setoid) -> ISetoid a
+fromIndexed x = MkISetoid (\i => (x i).U) (\i => (x i).relation) (\i => (x i).equivalence)
+
+public export
+(.index) : ISetoid a -> a -> Setoid
+(.index) x i = MkSetoid (x.U i) (x.relation i) (x.equivalence i)
+
 public export
 isetoid : (a -> Type) -> ISetoid a
 isetoid u = MkISetoid u (\_ => Equal) (\_ => equiv)
-- 
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