fork(2) download
copy 
  1. template < int head, int ... values >
  2. struct checker
  3. {
  4.   static constexpr bool value(int i) noexcept
  5.   { return i == head || checker<values...>::value(i); }
  6. };
  7.  
  8. template < int head >
  9. struct checker<head>
  10. {
  11.   static constexpr bool value(int i) noexcept
  12.   { return i == head; }
  13. };
  14.  
  15.  
  16. template< int ... values> 
  17. constexpr bool check( int i ) noexcept
  18. {
  19.   return checker<values...>::value(i);
  20. }
  21.  
  22.  
  23. int main() {
  24. 	static_assert(check<1, 2, 3>(2), "Bad true");
  25. 	static_assert(!check<4, 5, 6>(2), "Bad false");
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 3336KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/bkW3WS
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!