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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. template<typename...T> struct check;
  5. template<typename A, typename...B> struct check<A,B...> {
  6. 	static constexpr bool pass = check<B...>::pass;
  7. };
  8. template<typename...R> struct check<int,char,bool,R...> {
  9. 	static constexpr bool pass = true;
  10. };
  11. template<> struct check<> {
  12. 	static constexpr bool pass = false;
  13. };
  14.  
  15. template<typename... T>
  16. constexpr bool checkTO(T...) { return check<T...>::pass; }
  17.  
  18.  
  19.  
  20. int main()
  21. {
  22.   int a = 1;
  23.   char b = 'c';
  24.   bool c = true;
  25.   float d = 1.1;
  26.   float d1 = 1.1;
  27.   float d2 = 1.2;
  28.  
  29.   std::cout << "TRUE1: " << checkTO() << std::endl;
  30.   std::cout << "TRUE1: " << checkTO(a, b, c) << std::endl;
  31.   std::cout << "TRUE2: " << checkTO(a, a, b, c) << std::endl;
  32.   std::cout << "TRUE3: " << checkTO(a, a, b, c, c) << std::endl;
  33.   std::cout << "TRUE4: " << checkTO(d, a, b, c, c) << std::endl;
  34.   std::cout << "TRUE5: " << checkTO(a, b, d1, a, b, c, d2) << std::endl;
  35.   std::cout << "TRUE6: " << checkTO(d1, d2, a, a, a, b, c) << std::endl;
  36.   std::cout << "TRUE7: " << checkTO(a, b, c, d1, d2, a, a, b, a, c) << std::endl;
  37.   std::cout << "FALSE1: " << checkTO(c, a, b) << std::endl;
  38.   std::cout << "FALSE2: " << checkTO(b, c, a) << std::endl;
  39.   std::cout << "FALSE3: " << checkTO(d1, a, b) << std::endl;
  40.   std::cout << "FALSE4: " << checkTO(a, b, d1, c) << std::endl;
  41.  
  42. }
Success #stdin #stdout 0s 4348KB
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stdin
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Standard input is empty
stdout
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TRUE1: 0
TRUE1: 1
TRUE2: 1
TRUE3: 1
TRUE4: 1
TRUE5: 1
TRUE6: 1
TRUE7: 1
FALSE1: 0
FALSE2: 0
FALSE3: 0
FALSE4: 0
https://ideone.com/ngaDow
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
secret

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