From 65b40d31f7fae15f525d07c0efeb0b4c950cfcd0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lars=20G=C3=B6ttgens?= <lars.goettgens@rwth-aachen.de>
Date: Fri, 29 Nov 2024 16:30:39 +0100
Subject: [PATCH] Add `hash(::QmodnZ)`

---
 src/GrpAb/Dual.jl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/GrpAb/Dual.jl b/src/GrpAb/Dual.jl
index 7196e6f356..60e70e8090 100644
--- a/src/GrpAb/Dual.jl
+++ b/src/GrpAb/Dual.jl
@@ -144,6 +144,12 @@ function Base.:(==)(a::QmodnZ, b::QmodnZ)
   return a.n == b.n && a.d == b.d
 end
 
+function Base.hash(a::QmodnZ, h::UInt)
+  h = hash(a.n, h)
+  h = hash(a.d, h)
+  return h
+end
+
 function Base.:(==)(a::QmodnZElem, b::QmodnZElem)
   if parent(a).trivialmodulus
     return is_integral(a.elt - b.elt)
@@ -158,7 +164,7 @@ function Base.hash(a::QmodnZElem, h::UInt)
   if parent(a).trivialmodulus
     return hash(a.elt, h)
   end
-  error("not implemented")
+  return h
 end
 
 for T in [ZZRingElem, Integer, QQFieldElem, Rational]