Creating functions sequentialy

[Sergio]

Hi, I was trying to implement functions with data associted to it
sequentialy, I tried the following way(below), but that does not comply
with the compiler norms for C++ even though that's not any semantic or
sintax error..., does any one knows a way to do that?

Thanks

Code:
template<int *INT_POINTER>
class ClassA
{
public:
static void P(){}
};

int x[3];
typedef void(*VOIDFUNCVOID)();
VOIDFUNCVOID functions[3];

int main()
{
for(int i=0;i<3;i++)
/*error C2964: invalid expression as template parameter*/
functions=ClassA<&x>:;

return 0;
}

 

[mlimber]

Hi, I was trying to implement functions with data associted to it
sequentialy, I tried the following way(below), but that does not comply
with the compiler norms for C++ even though that's not any semantic or
sintax error..., does any one knows a way to do that?

Thanks

Code:
template<int *INT_POINTER>
class ClassA
{
public:
static void P(){}
};

int x[3];
typedef void(*VOIDFUNCVOID)();
VOIDFUNCVOID functions[3];

int main()
{
for(int i=0;i<3;i++)
/*error C2964: invalid expression as template parameter*/
functions=ClassA<&x>:;

return 0;
}

Template parameters must be constant at compile-time. Thus, you cannot
use a for loop variable to generate templates. You could use template
metaprogramming to generate that range for you, but your code above
borders on immoral in my book so I won't give an example.

Cheers! --M

 

[Sergio]

" borders on immoral in my book", what???

Thanks for the tip anyway...

 

[Sergio]

Thanks!!!

typedef void(*VOIDFUNCVOID)();
VOIDFUNCVOID functions[3];

template<int N>
class ClassA{
int transition;
public:
ClassA()
{
ClassA<N-1>();
functions[N]=ClassA:;
}
static void P()
{
cout<<N<<endl;
}
};

template<>
class ClassA<-1> {};

 

[mlimber]

" borders on immoral in my book", what???

Thanks for the tip anyway...

Terminology from the FAQ:

http://www.parashift.com/c++-faq-lite/how-to-learn-cpp.html#faq-28.4
http://www.parashift.com/c++-faq-lite/how-to-learn-cpp.html#faq-28.5

Cheers! --M