Python style range function in C as macro

for_range.h

#include <setjmp.h>

void generator();
jmp_buf buf;

#define YIELD(i) longjmp(buf, i)

#define FOR_RANGE(v,n) { \
    int v=0; \
    while(v!=n) { \
        v = setjmp(buf); \
        if (v == 0) { \
            generator(); \
        } \
        else {

#define END_RANGE }}}

void generator() {
    static int i=0;
    i++;
    YIELD(i);
}

test_for_range.c

#include <stdio.h>
#include "for_range.h"

int main() {
    FOR_RANGE(i, 5)
        printf("%d\n", i);
    END_RANGE
    return 0;
}