From 92cb22092c8f7123968efb05ecc90af326b1b24b Mon Sep 17 00:00:00 2001
From: Martin Holters <martin.holters@hsu-hh.de>
Date: Wed, 20 Sep 2017 17:58:20 +0200
Subject: [PATCH] Add `Tuple(::CartesianIndex)` (#23719)

---
 base/multidimensional.jl | 4 ++++
 test/arrayops.jl         | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/base/multidimensional.jl b/base/multidimensional.jl
index c9af4fef644ae..8e7a8990283a8 100644
--- a/base/multidimensional.jl
+++ b/base/multidimensional.jl
@@ -88,6 +88,10 @@ module IteratorsMD
 
     # indexing
     getindex(index::CartesianIndex, i::Integer) = index.I[i]
+    eltype(index::CartesianIndex) = eltype(index.I)
+
+    # access to index tuple
+    Tuple(index::CartesianIndex) = index.I
 
     # zeros and ones
     zero(::CartesianIndex{N}) where {N} = zero(CartesianIndex{N})
diff --git a/test/arrayops.jl b/test/arrayops.jl
index 89c1c27556d93..52c1f591e3d12 100644
--- a/test/arrayops.jl
+++ b/test/arrayops.jl
@@ -1554,6 +1554,8 @@ end
     @test min(CartesianIndex((2,3)), CartesianIndex((5,2))) == CartesianIndex((2,2))
     @test max(CartesianIndex((2,3)), CartesianIndex((5,2))) == CartesianIndex((5,3))
 
+    @test Tuple(I1) == (2,3,0)
+
     # CartesianIndex allows construction at a particular dimensionality
     @test length(CartesianIndex{3}()) == 3
     @test length(CartesianIndex{3}(1,2)) == 3