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#include <iostream>
#include <string>
using namespace std;
 
template<class... InitialArgTypes>
void CallWithExtraParameter(void (*funcPtr)(InitialArgTypes..., int), InitialArgTypes... initialArgs)
{
	(*funcPtr)(initialArgs..., 42);
}
 
void Callee(double a, string b, int c)
{
	cout << a << " " << b << " " << c << endl;
}
 
int main()
{
	CallWithExtraParameter<double, string>(Callee, 1.0, string("hello world"));
}

prog.cpp: In function 'int main()':
prog.cpp:18:75: error: no matching function for call to 'CallWithExtraParameter(void (&)(double, std::string, int), double, std::string)'
  CallWithExtraParameter<double, string>(Callee, 1.0, string("hello world"));
                                                                           ^
prog.cpp:6:6: note: candidate: template<class ... InitialArgTypes> void CallWithExtraParameter(void (*)(InitialArgTypes ..., int), InitialArgTypes ...)
 void CallWithExtraParameter(void (*funcPtr)(InitialArgTypes..., int), InitialArgTypes... initialArgs)
      ^
prog.cpp:6:6: note:   template argument deduction/substitution failed:
prog.cpp:18:75: note:   mismatched types 'int' and 'double'
  CallWithExtraParameter<double, string>(Callee, 1.0, string("hello world"));
                                                                           ^

Standard output is empty