Unary + operator for a single CartesianIndex (#54355)

JuliaLang · May 20, 2024 · 7b3072e · 7b3072e
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commit 7b3072e
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diff --git a/base/multidimensional.jl b/base/multidimensional.jl
@@ -115,6 +115,7 @@ module IteratorsMD
     oneunit(::Type{CartesianIndex{N}}) where {N} = CartesianIndex(ntuple(Returns(1), Val(N)))
 
     # arithmetic, min/max
+    @inline (+)(index::CartesianIndex) = index
     @inline (-)(index::CartesianIndex{N}) where {N} =
         CartesianIndex{N}(map(-, index.I))
     @inline (+)(index1::CartesianIndex{N}, index2::CartesianIndex{N}) where {N} =

diff --git a/test/arrayops.jl b/test/arrayops.jl
@@ -2072,6 +2072,7 @@ end
 
     I1 = CartesianIndex((2,3,0))
     I2 = CartesianIndex((-1,5,2))
+    @test +I1 == I1
     @test -I1 == CartesianIndex((-2,-3,0))
     @test I1 + I2 == CartesianIndex((1,8,2))
     @test I2 + I1 == CartesianIndex((1,8,2))