operator()

[Chameleon]

How I must implement function 'func' to work the code below?
I guess that I need templates but I haven't a link to start.
I saw something like this in boost::thread but I didn't understand.
--------------------------------------------------------------
class A
{
public:
void operator()() { printf("enter A\n"); }
};

void afunc() { printf("enter afunc\n"); }

void func(void (*a)()) { a(); }

int main() {
A a;
func(afunc);
func(&a);
return 0;
}

 

[Ian Collins]

How I must implement function 'func' to work the code below?
I guess that I need templates but I haven't a link to start.
I saw something like this in boost::thread but I didn't understand.
--------------------------------------------------------------
class A
{
public:
void operator()() { printf("enter A\n"); }
};

void afunc() { printf("enter afunc\n"); }

void func(void (*a)()) { a(); }

int main() {
A a;
func(afunc);
func(&a);
return 0;
}

template <typename F> void func( F a ) { a(); }

int main() {
A a;
func(afunc);
func(a);
return 0;
}