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#include <stdio.h>
void f1 (void) { printf("%i\n", 1); }
void f2 (void) { printf("%i\n", 2); }
void f3 (void) { printf("%i\n", 3); }
void f4 (void) { printf("%i\n", 4); }
void f5 (void) { printf("%i\n", 5); }
void f6 (void) { printf("%i\n", 6); }
void f7 (void) { printf("%i\n", 7); }
void f8 (void) { printf("%i\n", 8); }
void f9 (void) { printf("%i\n", 9); }
typedef void(*void_fp)(void);
// There is a basic check that excludes all functions that aren't used anywhere
// This ensures that check can't work in this example
const void_fp fp_all[] = {f1, f2 ,f3, f4, f5 ,f6, f7, f8, f9};
typedef struct fp_cc
{
int x;
const void_fp * const container;
} fp_cc;
void func()
{
const void_fp meta_fp = &f3;
const void_fp meta_fp2 = &f4;
fp_cc container_container2 = { .container = &meta_fp2, .x = 4 };
fp_cc container_container = { .container = &meta_fp, .x = 4 };
container_container = container_container2;
// Illegal:
//meta_fp = &f4;
//container_container.container = &f4;
(*container_container.container)();
}
int main()
{
func();
}
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