How can I specify a 32-bit pointer type a when compiling to a 64-bit target?

[thick jacinth]

I have a compiler which is tested on my local 64-bit machine, but it imports some types from some zig code that is separately compiled to wasm32 as part of the compiler runtime.
Is there a way to get the layout of a type for a specific target, not the target you are compiling to?

Or would it be best for me to:

• write my own source-of-truth logic for runtime types for my compiler's supported targets
• do some build.zig thing where I generate importable data exposing for each runtime target platform runtime type sizes

How can I specify a 32-bit pointer type a when compiling to a 64-bit target?

[half nebula]

couldnt the types use usize so that they're 32bit when compiled on wasm32 and 64bits on your machine?

[thick jacinth]

I am importing the (usually) 32-bit runtime types into my 64-bit compiler code, just to inspect the runtime types

so when compiling my compiler which wants to know the size of runtime types, the size of pointers is different than when compiling my runtime.

ngl I am assuming I will just want to do option 2 that I gave, where I invoke the zig compiler for each runtime platform just to generate platform-independent type (and field) sizes for each runtime type

but curious if there's like a @import("builtin").sizeOfOnPlatform(MyType, .wasm32)