From cf5a16e21f53be1eb68255ccd0fa600f66feeb62 Mon Sep 17 00:00:00 2001
From: Justin Willmert <justin@jdjlab.com>
Date: Tue, 31 Dec 2019 14:21:07 -0600
Subject: [PATCH] Add CartesianIndices(()) for Ref getindex and setindex!

---
 base/multidimensional.jl | 2 ++
 test/abstractarray.jl    | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/base/multidimensional.jl b/base/multidimensional.jl
index 3745186f5cc4f4..7da3fd5f7cbdbb 100644
--- a/base/multidimensional.jl
+++ b/base/multidimensional.jl
@@ -1802,4 +1802,6 @@ function _sortslices(A::AbstractArray, d::Val{dims}; kws...) where dims
 end
 
 getindex(b::Ref, ::CartesianIndex{0}) = getindex(b)
+getindex(b::Ref, ::CartesianIndices{0,Tuple{}}) = getindex(b)
 setindex!(b::Ref, x, ::CartesianIndex{0}) = setindex!(b, x)
+setindex!(b::Ref, x, ::CartesianIndices{0,Tuple{}}) = setindex!(b, x)
diff --git a/test/abstractarray.jl b/test/abstractarray.jl
index 8d0c2617d78f09..72af4b889ccabb 100644
--- a/test/abstractarray.jl
+++ b/test/abstractarray.jl
@@ -991,8 +991,11 @@ end
 @testset "getindex and setindex! for Ref" begin
     for x in [Ref(1), Ref([1,2,3], 1)]
         @test getindex(x) == getindex(x, CartesianIndex()) == 1
+        @test getindex(x) == getindex(x, CartesianIndices(())) == 1
         x[CartesianIndex()] = 10
         @test getindex(x) == getindex(x, CartesianIndex()) == 10
+        x[CartesianIndices(())] = 11
+        @test getindex(x) == getindex(x, CartesianIndices(())) == 11
     end
 end