MemoryLayout(::AbstractArray) (#11)

* let MemoryLayout act on arrays not just types

* allow MemoryLayout(::Any)

* actually run the tests before pushing

Co-authored-by: Michael Abbott <me@escbook>

Author: mcabbott

src/memorylayout.jl

@@ -140,6 +140,8 @@ in memory is unknown.
 Julia's internal linear algebra machinery will automatically (and invisibly)
 dispatch to BLAS and LAPACK routines if the memory layout is compatible.
 """
+@inline MemoryLayout(A) = MemoryLayout(typeof(A))
+
 @inline MemoryLayout(::Type) = UnknownLayout()
 
 @inline MemoryLayout(::Type{<:Number}) = ScalarLayout()
@@ -474,4 +476,4 @@ colsupport(A, j) = colsupport(MemoryLayout(typeof(A)), A, j)
 colsupport(A) = colsupport(A, axes(A,2))
 
 rowsupport(::ZerosLayout, A, _) = 1:0
-colsupport(::ZerosLayout, A, _) = 1:0
+colsupport(::ZerosLayout, A, _) = 1:0

test/test_layouts.jl

@@ -12,12 +12,12 @@ struct FooNumber <: Number end
 
 @testset "MemoryLayout" begin
     @testset "Trivial" begin
-        @test MemoryLayout(Float64) == MemoryLayout(Int) == MemoryLayout(FooNumber) == ScalarLayout()
-        @test MemoryLayout(FooBar) == UnknownLayout()
+        @test MemoryLayout(3.141) == MemoryLayout(Float64) == MemoryLayout(Int) == MemoryLayout(FooNumber) == ScalarLayout()
+        @test MemoryLayout(FooBar()) == MemoryLayout(FooBar) == UnknownLayout()
 
         A = randn(6)
         @test MemoryLayout(typeof(A)) == MemoryLayout(typeof(Base.ReshapedArray(A,(2,3),()))) == 
-            MemoryLayout(typeof(reinterpret(Float32,A))) == DenseColumnMajor()
+            MemoryLayout(typeof(reinterpret(Float32,A))) == MemoryLayout(A) == DenseColumnMajor()
 
         @test MemoryLayout(typeof(view(A,1:3))) == DenseColumnMajor()
         @test MemoryLayout(typeof(view(A,Base.OneTo(3)))) == DenseColumnMajor()
@@ -27,7 +27,7 @@ struct FooNumber <: Number end
 
         A = randn(6,6)
         V = view(A, 1:3,:)
-        @test MemoryLayout(typeof(V)) == ColumnMajor()
+        @test MemoryLayout(typeof(V)) == MemoryLayout(V) == ColumnMajor()
     end
 
     @testset "adjoint and transpose MemoryLayout" begin