How can I use WebAssembly Reference Types with LDC?

Sep 14

5 hours ago

// 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);

On 15/09/2024 5:05 AM, TM wrote: > 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. Indeed, what Martin is suggesting is that a compiler improvement is required. There is no way to do what you want currently.