Interaction and transpilation of union types

[taleeus]

Hi!
First of all: I love the project.

I'm trying to do some game-dev with SDL3, and I'm mapping extern types and functions as I need them. I stumbled upon the Event union, and I was wondering how So should handle union types. I guess defining a Go struct for an extern type should be no problem, but is there any way to express the same concept from Go to C (maybe with a //so directive)?

[nalgeon]

Hey Alessandro, thanks for your interest in Solod! You declare union types as regular structs with the so:extern directive:

//so:extern SDL_CommonEvent
type SDL_CommonEvent struct {
	// ...
}

//so:extern SDL_DisplayEvent
type SDL_DisplayEvent struct {
	// ...
}

//so:extern SDL_Event
type SDL_Event struct {
	common  SDL_CommonEvent
    display SDL_DisplayEvent
    // ...
}

[nalgeon]

One more thing: you might want to use sobind to generate bindings instead of writing them by hand. I'm not sure they'll be 100% accurate because SDL is pretty complex, but it's probably a good place to start.

If you decide to do this, make sure to install the latest versions of sobind and so — there have been some changes recently.

[taleeus]

Oh perfect, thank you so much!