#include <cassert>
#include <iostream>
#include <type_traits>

class Count {
    int value_;
public:
    explicit Count(int value) : value_(value) {}
    int value() const { return value_; }
    explicit operator bool() const { return value_ != 0; }
};

int main() {
    static_assert(std::is_constructible<Count, int>::value, "direct construction");
    static_assert(!std::is_convertible<int, Count>::value, "no implicit conversion");
    Count count{3};
    const bool active = static_cast<bool>(count);
    assert(active);
    if (count) std::cout << count.value() << '\n';
}