templateFunctionTemplateArgument

#include "stdafx.h"

bool something, something_else;
template<class T>
int sum(T a, T b)
{
    return a + b;
}

template< template<typename> class Func >
int function(int X, int Y, Func OP)
{
    if (something)
        return OP<int>(X,Y);
    else if(something_else)
        return OP<double>(X,Y);
}

int main()
{
    int n1 = 1, n2 = 2;
    function(n1, n2, sum);
    return 0;
}

/*
ERRORS:

testTemplate.cpp(11) : error C3205: argument list for template template parameter 'Func' is missing
testTemplate.cpp(22) : error C2896: 'int function(int,int,Func)' : cannot use function template 'int sum(T,T)' as a function argument
    testTemplate.cpp(5) : see declaration of 'sum'
testTemplate.cpp(22) : error C2784: 'int function(int,int,Func)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type'
    testTemplate.cpp(11) : see declaration of 'function'
*/