allow Array{T,N}() for arbitrary N

JuliaLang · Jan 26, 2017 · db8493b · db8493b
1 parent 1303dfb
commit db8493b
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diff --git a/base/array.jl b/base/array.jl
@@ -44,6 +44,8 @@ function vect(X...)
     return copy!(Array{T,1}(length(X)), X)
 end
 
+(::Type{Array{T,N}}){T,N}() = Array{T,N}(ntuple(i -> 0, Val{N})...)
+
 size(a::Array, d) = arraysize(a, d)
 size(a::Vector) = (arraysize(a,1),)
 size(a::Matrix) = (arraysize(a,1), arraysize(a,2))

diff --git a/test/arrayops.jl b/test/arrayops.jl
@@ -1250,6 +1250,10 @@ let a = Array{Float64}(10)
     @test size(aa) == size(bb)
     bbb = Array{Float64, 9}(9,8,7,6,5,4,3,2,1)
     @test size(aaa) == size(bbb)
+
+    #14201 Test Array{T, N}() constructor
+    @test size(Array{Float64,5}()) == (0,0,0,0,0)
+    @test size(Array{Float64,8}()) == (0,0,0,0,0,0,0,0)
 end
 
 # Cartesian