transform.cpp

来自「Thinking in C++ 2nd edition source code 」· C++ 代码 · 共 28 行

//: C21:Transform.cpp
// From Thinking in C++, 2nd Edition
// at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Use of STL transform() algorithm
#include <iostream>
#include <vector>
#include <algorithm>
#include "Counted.h"
using namespace std;

template<class T>
T* deleteP(T* x) { delete x; return 0; }

template<class T> struct Deleter {
  T* operator()(T* x) { delete x; return 0; }
};

int main() {
  CountedVector cv("one");
  transform(cv.begin(), cv.end(), cv.begin(), 
    deleteP<Counted>);
  CountedVector cv2("two");
  transform(cv2.begin(), cv2.end(), cv2.begin(),
    Deleter<Counted>());
} ///:~