quick demo of the C module hack for SDL2

sdl2-modules.c

// https://snai.pe/posts/modules-in-c99
// ah, much nicer!

#include <SDL.h>

struct m_sdl {
	int (*init)(Uint32);
	SDL_Window* (*create_window)(const char*, int, int, int, int, Uint32);
	void (*delay)(Uint32);
	void (*destroy_window)(SDL_Window*);
	void (*quit)(void);

	Uint32 INIT_VIDEO;
	Uint32 WINDOWPOS_UNDEFINED;
	Uint32 WINDOW_SHOWN;
};

const struct m_sdl sdl = {
	.init = SDL_Init,
	.create_window = SDL_CreateWindow,
	.delay = SDL_Delay,
	.destroy_window = SDL_DestroyWindow,
	.quit = SDL_Quit,

	.INIT_VIDEO = SDL_INIT_VIDEO,
	.WINDOWPOS_UNDEFINED = SDL_WINDOWPOS_UNDEFINED,
	.WINDOW_SHOWN = SDL_WINDOW_SHOWN,
};

typedef SDL_Window* Window;

int main() {
	sdl.init(sdl.INIT_VIDEO);
	Window w = sdl.create_window("no modules", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, 400, 400, sdl.WINDOW_SHOWN);
	sdl.delay(1000);
	sdl.destroy_window(w);
	sdl.quit();
	return 0;
}