example.txt

> iter = Utils::iterate((string[]) {"foo", "bar", "baz"});
> string a;
> while (iter(&a)) {
+       printf("%s\n", a);
+ }
foo
bar
baz

iterate.5c

namespace Utils {
    public bool(*poly) function iterate(poly[] list) {
        return (bool func(*poly value) {
            static int i = 0;
            if (i < dim(list)) {
                *value = list[i];
                i++;
                return true;
            } else {
                return false;
            }
        });
    }
}