Does C have a “foreach” loop construct?

Question

Almost all languages have a foreach loop or something similar. Does C have one? Can you post some example code?

Answer 1

If you're planning to work with function pointers

#define lambda(return_type, function_body)\
    ({ return_type __fn__ function_body __fn__; })

#define array_len(arr) (sizeof(arr)/sizeof(arr[0]))

#define foreachnf(type, item, arr, arr_length, func) {\
    void (*action)(type item) = func;\
    for (int i = 0; i

Usage:

int ints[] = { 1, 2, 3, 4, 5 };
foreach(int, i, ints, {
    printf("%d\n", i);
});

char* strs[] = { "hi!", "hello!!", "hello world", "just", "testing" };
foreach(char*, s, strs, {
    printf("%s\n", s);
});

char** strsp = malloc(sizeof(char*)*2);
strsp[0] = "abcd";
strsp[1] = "efgh";
foreachn(char*, s, strsp, 2, {
    printf("%s\n", s);
});

void (*myfun)(int i) = somefunc;
foreachf(int, i, ints, myfun);

But I think this will work only on gcc (not sure).