ParallelStencil.jl cannot initialize with parameterized backend

General Usage
1

Hi, I’m trying to use parallelstencil.jl with Threads or CUDA and ran into the following error:

julia> using ParallelStencil

julia> using CUDA

julia> pscheme=CUDA
CUDA

julia> @init_parallel_stencil(pscheme, Float64, 2)
ERROR: ArgumentError: package has to be functional and one of the following: Threads, CUDA, AMDGPU (obtained: pscheme).

It looks like the initialization macro only takes literally Threads or CUDA as inputs. Moreover, this error is even more intriguing:

julia> if false
       @init_parallel_stencil(pscheme, Float64, 2)
       end
ERROR: ArgumentError: package has to be functional and one of the following: Threads, CUDA, AMDGPU (obtained: pscheme).

It looks like the macro has to run even the condition is not met? It looks like I don’t seem to know how macro works. If I do it straightforwardly, there is no complaint:

julia> @init_parallel_stencil(CUDA, Float64, 2)

julia>

So how should I initialize conditionally and / or parametrically? I’m using Julia 1.9.2