Re: auto_ptr who is right?

"BobR" <>
Mon, 03 Sep 2007 01:10:16 GMT
Barry <> 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;
     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();

Bob R

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