#include <iostream>
struct Function
{
virtual ~Function() {}
virtual void operator()() = 0;
};
template <typename Class, typename ARG1>
struct MemberFunction1 : public Function
{
typedef void (Class::*MEM_FUNC)(ARG1);
explicit MemberFunction1(Class * obj, MEM_FUNC func, ARG1 arg1) : m_object(obj), m_func(func), m_arg1(arg1) {}
virtual void operator()()
{
(m_object->*m_func)(m_arg1);
}
Class * m_object;
MEM_FUNC m_func;
ARG1 m_arg1;
};
struct FunctionStorage
{
explicit FunctionStorage(Function * func) : m_func(func) {}
virtual ~FunctionStorage()
{
if (m_func)
{
delete m_func;
m_func = 0;
}
}
void call() { (*m_func)(); }
Function * m_func;
};
struct MemberFunction : public FunctionStorage
{
template <typename Class, typename ARG1>
MemberFunction(Class * obj, void (Class::*func)(ARG1), ARG1 arg1) : FunctionStorage(new MemberFunction1<Class, ARG1>(obj, func, arg1)) {}
};
class Foo
{
public:
void funcWithParam(int value)
{
std::cout << "foo::funcWithParam(" << value << ")\n";
}
void funcWithParam(const char * msg)
{
std::cout << "foo::funcWithParam(" << msg << ")\n";
}
};
int main()
{
Foo f;
MemberFunction(&f, &Foo::funcWithParam, 5).call();
MemberFunction(&f, &Foo::funcWithParam, "hello").call();
return 0;
}
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