Use unsafe_convert instead of pointer

Author: mbauman

stdlib/LinearAlgebra/src/adjtrans.jl

@@ -193,8 +193,8 @@ Base.strides(A::Transpose{<:Any, <:StridedVector}) = (stride(A.parent, 2), strid
 Base.strides(A::Adjoint{<:Real, <:StridedMatrix}) = reverse(strides(A.parent))
 Base.strides(A::Transpose{<:Any, <:StridedMatrix}) = reverse(strides(A.parent))
 
-Base.pointer(A::Adjoint{<:Real, <:Union{StridedVector,StridedMatrix}}) = pointer(A.parent)
-Base.pointer(A::Transpose{<:Any, <:Union{StridedVector,StridedMatrix}}) = pointer(A.parent)
+Base.unsafe_convert(::Type{Ptr{T}}, A::Adjoint{<:Real, <:StridedVecOrMat}) where {T} = Base.unsafe_convert(Ptr{T}, A.parent)
+Base.unsafe_convert(::Type{Ptr{T}}, A::Transpose{<:Any, <:StridedVecOrMat}) where {T} = Base.unsafe_convert(Ptr{T}, A.parent)
 
 # for vectors, the semantics of the wrapped and unwrapped types differ
 # so attempt to maintain both the parent and wrapper type insofar as possible

stdlib/LinearAlgebra/test/adjtrans.jl

@@ -501,10 +501,10 @@ end
     @test strides(Transpose(rand(3, 2) .+ rand(3, 2).*im)) == (3, 1)
 
     C = rand(3) .+ rand(3).*im
-    @test_throws MethodError pointer(Adjoint(C))
+    @test_throws ErrorException pointer(Adjoint(C))
     @test pointer(Transpose(C)) === pointer(C)
     D = rand(3,2) .+ rand(3,2).*im
-    @test_throws MethodError pointer(Adjoint(D))
+    @test_throws ErrorException pointer(Adjoint(D))
     @test pointer(Transpose(D)) === pointer(D)
 end