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#include <iostream>
using namespace std;
 
template<size_t n>
void template_magic(char (&array)[n])
{
	cout << "array size: " << n << endl;
}
 
int main()
{
	char array[10] = {};
	char* pointer = array;
	template_magic(pointer);
	return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:14:24: error: no matching function for call to ‘template_magic(char*&)’
  template_magic(pointer);
                        ^
prog.cpp:14:24: note: candidate is:
prog.cpp:5:6: note: template<unsigned int n> void template_magic(char (&)[n])
 void template_magic(char (&array)[n])
      ^
prog.cpp:5:6: note:   template argument deduction/substitution failed:
prog.cpp:14:24: note:   mismatched types ‘char [n]’ and ‘char*’
  template_magic(pointer);
                        ^

Standard output is empty