Add constructor for GPUArrays (#166)

* Add constructor for GPUArrays

* Use recursive_eltype

* Add constructor for GPUComponentArrays

* Dont't convert eltype on GPU

* Use SciML definition of parameterless_type

Author: ldeso

src/compat/gpuarrays.jl

@@ -64,3 +64,10 @@ for (fname, op) in [(:sum, :(Base.add_sum)), (:prod, :(Base.mul_prod)),
             GPUArrays.mapreducedim!(f, $(op), getdata(r), getdata(A); init=neutral_element($(op), T))
     end
 end
+
+function ComponentArray(nt::NamedTuple{names,<:Tuple{Vararg{Union{GPUArrays.AbstractGPUArray,GPUComponentArray}}}}) where {names}
+    T = recursive_eltype(nt)
+    gpuarray = getdata(first(nt))
+    G = Base.typename(typeof(gpuarray)).wrapper  # SciMLBase.parameterless_type(gpuarray)
+    return GPUArrays.adapt(G, ComponentArray(NamedTuple{names}(map(GPUArrays.adapt(Array{T}), nt))))
+end