trashprototypeinit.cpp

Thingking in c++第二版

//: C09:TrashPrototypeInit.cpp {O}
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
// Performs initialization of all the prototypes.
// Create a different version of this file to
// make different kinds of Trash.
#include "Trash.h"
#include "Aluminum.h"
#include "Paper.h"
#include "Glass.h"
#include "Cardboard.h"

// Allocate the static member object:
std::vector<Trash*> Trash::prototypes;

class TrashPrototypeInit {
  Aluminum a;
  Paper p;
  Glass g;
  Cardboard c;
  TrashPrototypeInit() {
    Trash::prototypes.push_back(&a);
    Trash::prototypes.push_back(&p);
    Trash::prototypes.push_back(&g);
    Trash::prototypes.push_back(&c);
  }
  static TrashPrototypeInit singleton;
};

TrashPrototypeInit 
  TrashPrototypeInit::singleton; ///:~