Fix 0-dim isstored

Author: mtfishman

src/blocksparsearrayinterface/blocksparsearrayinterface.jl

@@ -42,9 +42,8 @@ function eachblockstoredindex(a::AbstractArray)
   return Block.(Tuple.(eachstoredindex(blocks(a))))
 end
 
-function SparseArraysBase.isstored(
-  a::AbstractArray{<:Any,N}, I::Vararg{Block{1},N}
-) where {N}
+function SparseArraysBase.isstored(a::AbstractArray, I1::Block{1}, Irest::Block{1}...)
+  I = (I1, Irest...)
   return isstored(blocks(a), Int.(I)...)
 end
 function SparseArraysBase.isstored(a::AbstractArray{<:Any,N}, I::Block{N}) where {N}

test/test_view_bang.jl

@@ -55,22 +55,22 @@ arrayts = (Array, JLArray)
     @test view!(a, blk...) == x
     @test @view!(a[blk...]) == x
   end
-  ## # 0-dim case
-  ## # Regression test for https://github.com/ITensor/BlockSparseArrays.jl/issues/148
-  ## for I in ((), (Block(),))
-  ##   a = dev(BlockSparseArray{elt}(undef))
-  ##   @test !isstored(a)
-  ##   @test iszero(blockstoredlength(a))
-  ##   @test isempty(eachblockstoredindex(a))
-  ##   @test iszero(a)
-  ##   b = @view! a[I...]
-  ##   @test isstored(a)
-  ##   @test isone(blockstoredlength(a))
-  ##   @test issetequal(eachblockstoredindex(a), [Block()])
-  ##   @test iszero(adapt(Array)(a))
-  ##   @test b isa arrayt{elt,0}
-  ##   @test size(b) == ()
-  ##   # Converting to `Array` works around a bug in `iszero(JLArray{Float64}(undef))`.
-  ##   @test iszero(adapt(Array)(b))
-  ## end
+  # 0-dim case
+  # Regression test for https://github.com/ITensor/BlockSparseArrays.jl/issues/148
+  for I in ((), (Block(),))
+    a = dev(BlockSparseArray{elt}(undef))
+    @test !isstored(a)
+    @test iszero(blockstoredlength(a))
+    @test isempty(eachblockstoredindex(a))
+    @test iszero(a)
+    b = @view! a[I...]
+    @test isstored(a)
+    @test isone(blockstoredlength(a))
+    @test issetequal(eachblockstoredindex(a), [Block()])
+    @test iszero(adapt(Array)(a))
+    @test b isa arrayt{elt,0}
+    @test size(b) == ()
+    # Converting to `Array` works around a bug in `iszero(JLArray{Float64}(undef))`.
+    @test iszero(adapt(Array)(b))
+  end
 end