Support DualLayout (#85)

Author: dlfivefifty

Project.toml

@@ -1,6 +1,6 @@
 name = "BlockBandedMatrices"
 uuid = "ffab5731-97b5-5995-9138-79e8c1846df0"
-version = "0.9.1"
+version = "0.9.2"
 
 [deps]
 ArrayLayouts = "4c555306-a7a7-4459-81d9-ec55ddd5c99a"

src/BandedBlockBandedMatrix.jl

@@ -256,6 +256,8 @@ end
 ################################
 
 bandedblockbandedcolumns(L::AbstractColumnMajor) = BandedBlockBandedColumnMajor()
+bandedblockbandedcolumns(L::AbstractRowMajor) = BandedBlockBandedColumns{RowMajor}()
+bandedblockbandedcolumns(::DualLayout{ML}) where ML = bandedblockbandedcolumns(ML())
 bandedblockbandedcolumns(_) = BandedBlockBandedColumns{UnknownLayout}()
 
 MemoryLayout(::Type{<:BandedBlockBandedMatrix{<:Any,BLOCKS}}) where BLOCKS =

test/test_bandedblockbanded.jl

@@ -1,5 +1,6 @@
 using BlockArrays, BandedMatrices, BlockBandedMatrices, FillArrays, SparseArrays, Test, ArrayLayouts , LinearAlgebra
-import BlockBandedMatrices: _BandedBlockBandedMatrix, blockcolsupport, blockrowsupport, colsupport, rowsupport, isbandedblockbanded, bandeddata
+import BlockBandedMatrices: _BandedBlockBandedMatrix, blockcolsupport, blockrowsupport, colsupport, rowsupport, 
+                            isbandedblockbanded, bandeddata, BandedBlockBandedColumns
 
 @testset "BandedBlockBandedMatrix" begin
     @testset "constructors" begin
@@ -481,6 +482,11 @@ import BlockBandedMatrices: _BandedBlockBandedMatrix, blockcolsupport, blockrows
         @test subblockbandwidths(B) == (1,1)
         @test blockbandwidths(B) == (0,0)
     end
+
+    @testset "DualLayout blocks" begin
+        A = _BandedBlockBandedMatrix(PseudoBlockVector([1,2,3],[1,2])', blockedrange([1,2]), (-1,1), (-1,1))
+        @test MemoryLayout(A) isa BandedBlockBandedColumns{RowMajor}
+    end
 end
 
 if false # turned off since tests have check-bounds=yes