function.c

#include "uprintf.h"

typedef int *(*fun0_t)(void);

typedef struct {
    int num;
    fun0_t f0;
} Result;

typedef Result *(*fun_t)(void);
typedef fun_t (*fun1_t)(void);

typedef struct {
    fun1_t f;
    fun1_t *fp;
} Functions;


static int num = 200;

__attribute__((noinline)) int *fun0(void) { return # }

static Result result = {
    .num = 100,
    .f0 = fun0,
};

__attribute__((noinline)) Result *fun(void) { return &result; }

__attribute__((noinline)) fun_t fun1(void) { return fun; }

__attribute__((noinline)) fun1_t fun2(void) { return fun1; }


int main(void) {
    uprintf("&fun2: %S\n", &fun2);
    uprintf("fun2(): %S\n", fun2());
    uprintf("fun2()(): %S\n", fun2()());
    uprintf("fun2()()(): %S\n", fun2()()());
    uprintf("fun2()()().num: %S\n", &fun2()()()->num);
    uprintf("fun2()()().f0: %S\n", fun2()()()->f0);
    uprintf("&fun2()()().f0: %S\n", &fun2()()()->f0);
    uprintf("fun2()()().f0(): %S\n", fun2()()()->f0());


    fun_t var_fun = fun;
    fun1_t var_fun1 = fun1;
    fun_t *ptr_fun = &var_fun;

    uprintf("&var_fun: %S\n", &var_fun);
    uprintf("var_fun(): %S\n", var_fun());
    uprintf("var_fun().num: %S\n", &var_fun()->num);
    uprintf("var_fun().f0: %S\n", var_fun()->f0);
    uprintf("&var_fun().f0: %S\n", &var_fun()->f0);
    uprintf("var_fun().f0(): %S\n", var_fun()->f0());
    uprintf("ptr_fun: %S\n", ptr_fun);
    uprintf("(*ptr_fun)(): %S\n", (*ptr_fun)());
    uprintf("(*ptr_fun)().num: %S\n", &(*ptr_fun)()->num);
    uprintf("(*ptr_fun)().f0: %S\n", (*ptr_fun)()->f0);
    uprintf("&(*ptr_fun)().f0: %S\n", &(*ptr_fun)()->f0);
    uprintf("(*ptr_fun)().f0(): %S\n", (*ptr_fun)()->f0());


    Functions functions = {
        .f = fun1,
        .fp = &var_fun1,
    };

    uprintf("&functions: %S\n", &functions);
    uprintf("&functions.f: %S\n", &functions.f);
    uprintf("functions.f(): %S\n", functions.f());
    uprintf("functions.f()(): %S\n", functions.f()());
    uprintf("functions.f()().num: %S\n", &functions.f()()->num);
    uprintf("functions.f()().f0: %S\n", functions.f()()->f0);
    uprintf("&functions.f()().f0: %S\n", &functions.f()()->f0);
    uprintf("functions.f()().f0()(): %S\n", functions.f()()->f0());
    uprintf("functions.fp: %S\n", functions.fp);
    uprintf("(*functions.fp)(): %S\n", (*functions.fp)());
    uprintf("(*functions.fp)()(): %S\n", (*functions.fp)()());
    uprintf("(*functions.fp)()().num: %S\n", &(*functions.fp)()()->num);
    uprintf("(*functions.fp)()().f0: %S\n", (*functions.fp)()()->f0);
    uprintf("&(*functions.fp)()().f0: %S\n", &(*functions.fp)()()->f0);
    uprintf("(*functions.fp)()().f0()(): %S\n", (*functions.fp)()()->f0());

    return _upf_test_status;
}