How can I use WebAssembly Reference Types with LDC?

[TM]

On Saturday, 14 September 2024 at 12:08:13 UTC, kinke wrote:
> On Saturday, 14 September 2024 at 08:28:02 UTC, TM wrote:
>> In C/C++, you can access wasm's externref and funcref using:
>> ```C++
>> char __attribute__((address_space(10)))* //externref
>> char __attribute__((address_space(20)))* //funcref
>> ```
>> Does D provide similar functionality?
>
> Nope, there's currently no way to customize the address-space 
> of pointers. dcompute has 2-3 magic structs for expressing such 
> pointers.
>
> Maybe this could by solved via some magic
> ```D
> // magic struct requiring compiler support
> struct __as_pointer(T, uint addressSpace) { T* ptr; alias this 
> = ptr; }
>
> alias ExternRef(T) = __as_pointer!(T, 10);
> alias FuncRef(T) = __as_pointer!(T, 20);
> ```

Thank you for your response. Unfortunately, I was unable to 
generate wasm's externref using the method you suggested. It 
appears that dcompute cannot generate code targeting wasm.

Sadly, it seems difficult to achieve this with the capabilities 
of the dlang.