C++: conjunction/disjunction/negation

개요

• conjunction
  • and 연산을 효과적으로 수행
• disjunction
  • or 연산을 효과적으로 수행
• negation
  • 부정 연산 수행

예제

• 코드

    #include <iostream>

    using namespace std;

    template <typename T, typename... Ts> void func(T, Ts...) {
    	if (conjunction<is_same<T, Ts>...>::value) {
    		cout << "conjunction" << endl;
    	}

    	if (disjunction<is_same<T, Ts>...>::value) {
    		cout << "disjunction" << endl;
    	}
    }

    int main() {
    	func(1, 2, 3);

    	cout << "------ 1" << endl;

    	func(1, "a");

    	cout << "------ 2" << endl;

    	func(1, 2, "a");

    	cout << "------ 3" << endl;

    	cout << negation<bool_constant<true>>::value << endl;
    	cout << negation<bool_constant<false>>::value << endl;

    	return 0;
    }

• 실행 결과

    conjunction
    disjunction
    ------ 1
    ------ 2
    disjunction
    ------ 3
    0
    1