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#include <array>
#include <iostream>
#include <utility>
 
using namespace std;
 
template <typename T, size_t I>
bool bar(const T& param) { return param[I] != 13; }
 
template <typename T, size_t... ARGS>
void bar(const T& param, const std::index_sequence<ARGS...>&) { 
  if(bar<ARGS>(param) && ...)
  {
    cout << "no matches\n";
  }
  else
  {
    cout << "matched\n";
  }
}
 
int main() {
  const array<int, 3U> foo = { 0, 1, 2 };
 
  bar(foo, std::make_index_sequence<std::size(decltype(foo)())>());
}

prog.cpp: In function ‘void bar(const T&, std::index_sequence<ARGS ...>&)’:
prog.cpp:12:23: error: expected ‘)’ before ‘&&’ token
   if(bar<ARGS>(param) && ...)
                       ^~
prog.cpp:12:29: error: parameter packs not expanded with ‘...’:
   if(bar<ARGS>(param) && ...)
                             ^
prog.cpp:12:29: note:         ‘ARGS’
prog.cpp: In function ‘int main()’:
prog.cpp:25:37: error: ‘size’ is not a member of ‘std’
   bar(foo, std::make_index_sequence<std::size(decltype(foo)())>());
                                     ^~~
prog.cpp:25:37: error: ‘size’ is not a member of ‘std’
prog.cpp:25:63: error: template argument 1 is invalid
   bar(foo, std::make_index_sequence<std::size(decltype(foo)())>());
                                                               ^

Standard output is empty