... or the following with the "emit" keyword defined as the only macro. The
function connect() could be simplified but I won't go further because it is
not pure C++. You take the decisions from here:
#include <vector>
#include <utility>
#include <iostream>
using namespace std;
struct Object
{
};
template <typename T>
struct signal : vector< pair<Object *, T Object::*> >
{
typedef typename vector< pair<Object *, T Object::*> >::value_type
value_type;
void connect(Object * p, T Object::* s)
{
push_back(value_type(p, s));
}
};
#define emit(SIGNAL) for (size_t i = 0; i != SIGNAL.size(); ++ i)
(SIGNAL[i].first->*SIGNAL[i].second)
// Usage example:
struct A : Object
{
signal<void (int)> sigdone;
};
struct B : Object
{
void slot_bip(int a, ...)
{
cout << __PRETTY_FUNCTION__ << ": " << a << endl;
}
void slot_refresh(int a, ...)
{
cout << __PRETTY_FUNCTION__ << ": " << a << endl;
}
};
int main()
{
A a;
B b;
a.sigdone.connect(& b, (void (Object::*)(int)) & B::slot_bip);
a.sigdone.connect(& b, (void (Object::*)(int)) & B::slot_refresh);
emit (a.sigdone)(99);
}
Philippe
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