C is awesome!

macros.c

#include <stdio.h>
#include <stdlib.h>

#define call(VAR, METHOD, ...) (VAR)->METHOD(VAR, __VA_ARGS__)
#define with(TYPE, NAME, VALUE, BODY) {TYPE NAME = VALUE; BODY free(NAME);}

void flyImpl(void* rocket, int x_fore, int y_fore) {
    printf("Applying force (%i, %i)\n", x_fore, y_fore);
}

typedef struct {
    void (*fly)(void*, int, int);
} Rocket;

int main(int argc, char const *argv[]){
    with(char*, test, NULL, {
        asprintf(&test, "My name is %s", "Macro Lover");
        printf("test said: \"%s\"\n", test);
    });

    Rocket rocket;
    rocket.fly = flyImpl;
    call(&rocket, fly, 2, 3);
}