From 9fe96e6e2abb363ac79b94454840923cdf92da15 Mon Sep 17 00:00:00 2001
From: Jishnu Bhattacharya <jishnub.github@gmail.com>
Date: Fri, 29 Mar 2024 16:19:52 +0530
Subject: [PATCH] SparseVector constructors

---
 src/sparsevector.jl  |  1 +
 test/sparsevector.jl | 12 ++++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/sparsevector.jl b/src/sparsevector.jl
index 206a1e06..41498b50 100644
--- a/src/sparsevector.jl
+++ b/src/sparsevector.jl
@@ -50,6 +50,7 @@ SparseVector(n::Integer, nzind::Vector{Ti}, nzval::Vector{Tv}) where {Tv,Ti} =
     SparseVector{Tv,Ti}(n, nzind, nzval)
 
 SparseVector{Tv, Ti}(::UndefInitializer, n::Integer) where {Tv, Ti}  = SparseVector{Tv, Ti}(n, Ti[], Tv[])
+SparseVector{Tv, Ti}(::UndefInitializer, (n,)::Tuple{Integer}) where {Tv, Ti}  = SparseVector{Tv, Ti}(n, Ti[], Tv[])
 
 """
     FixedSparseVector{Tv,Ti<:Integer} <: AbstractCompressedVector{Tv,Ti}
diff --git a/test/sparsevector.jl b/test/sparsevector.jl
index 513028e5..15499e12 100644
--- a/test/sparsevector.jl
+++ b/test/sparsevector.jl
@@ -219,10 +219,14 @@ end
     end
 
     @testset "Undef initializer" begin
-        v = SparseVector{Float32, Int16}(undef, 4)
-        @test size(v) == (4, )
-        @test eltype(v) === Float32
-        @test v == spzeros(Float32, 4)
+        sz = (4,)
+        for v in (SparseVector{Float32, Int16}(undef, sz),
+                    SparseVector{Float32, Int16}(undef, sz...),
+                    similar(SparseVector{Float32, Int16}, sz))
+            @test size(v) == sz
+            @test eltype(v) === Float32
+            @test v == spzeros(Float32, sz...)
+        end
     end
 end
 ### Element access