#if __cplusplus >= 201703L
#include <bitset.h>

enum bits { a, b, c, d };

int main() {
  {
    bitset<bits> t;
    assert(t.is_empty());
    assert(!t.is_set(a));
    assert(!t.is_set(b));
    assert(!t.is_set(c));
    assert(!t.is_set(d));
  }
  {
    bitset<bits> t(b);
    assert(!t.is_empty());
    assert(!t.is_set(a));
    assert(t.is_set(b));
    assert(!t.is_set(c));
    assert(!t.is_set(d));
  }
  {
    bitset<bits> t(a, c);
    assert(!t.is_empty());
    assert(t.is_set(a));
    assert(!t.is_set(b));
    assert(t.is_set(c));
    assert(!t.is_set(d));
  }
  {
    bitset<bits> t;
    t.set(b, d);
    assert(!t.is_empty());
    assert(!t.is_set(a));
    assert(t.is_set(b));
    assert(!t.is_set(c));
    assert(t.is_set(d));
    t.set(c);
    assert(!t.is_empty());
    assert(!t.is_set(a));
    assert(t.is_set(b));
    assert(t.is_set(c));
    assert(t.is_set(d));

    t.unset();
    assert(!t.is_empty());
    t.unset(b, d);
    assert(!t.is_empty());
    assert(!t.is_set(a));
    assert(!t.is_set(b));
    assert(t.is_set(c));
    assert(!t.is_set(d));
    t.unset(c);
    assert(t.is_empty());
    assert(!t.is_set(a));
    assert(!t.is_set(b));
    assert(!t.is_set(c));
    assert(!t.is_set(d));
  }
  {
    bitset<bits> t;
    t.set(a, b, d);
    assert(!t.any());
    assert(!t.any(c));
    assert(t.any(a));
    assert(t.any(a, c));
    assert(t.any(a, b));
  }
  {
    bitset<bits> t;
    t.set(a, b, d);
    assert(!t.all());
    assert(!t.all(c));
    assert(t.all(a));
    assert(!t.all(a, c));
    assert(t.all(a, b));
    assert(t.all(a, b, d));
    assert(!t.all(a, b, c, d));
  }
  return 0;
}
#else
#include <cstdio>
int main() {
  puts("[bitset]: not built with >cpp17");
}
#endif