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#include <iostream>
 
using namespace std;
 
template <size_t n> void f(int a[n])
{
  cout << n << endl;
}
 
int main()
{
  f(new (int[5]));
  return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:12:17: error: no matching function for call to ‘f(int*)’
   f(new (int[5]));
                 ^
prog.cpp:5:26: note: candidate: ‘template<long unsigned int n> void f(int*)’
 template <size_t n> void f(int a[n])
                          ^
prog.cpp:5:26: note:   template argument deduction/substitution failed:
prog.cpp:12:17: note:   couldn't deduce template parameter ‘n’
   f(new (int[5]));
                 ^

Standard output is empty