transform.cpp

来自「很经典的书籍」· C++ 代码 · 共 30 行

//: C06:Transform.cpp
// Use of STL transform() algorithm
#include "Counted.h"
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

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

#ifdef _MSC_VER
// Microsoft needs explicit instantiation
template Counted* deleteP(Counted* x);
#endif


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>());
} ///:~