C++ pimpl机制详细讲解

class Demo {
public:
	...
private:
	DemoImp* imp_;
}

#pragma once
#include <unordered_map>
#include <vector>
#include <memory>
//  Pointer to impl ementation
class CookImpl;
// 后厨
class Cook {
public:
    Cook(int, const std::vector<std::string>&);
    ~Cook();
    std::vector<std::string> getMenu();     
    uint32_t getChefNum();                  
private:
    CookImpl* impl_;
};
typedef std::shared_ptr<Cook> CookPtr;		// 美妙的typedef 懒人工具

#include "cook_cuisine.h"
class CookImpl {
public:
    CookImpl(uint32_t checf_num, const std::vector<std::string>& menu):checf_num_(checf_num), menu_(menu) {}
    std::vector<std::string> getMenu();
    uint32_t getChefNum();
private:
    uint32_t checf_num_;
    std::vector<std::string> menu_;
};
std::vector<std::string> CookImpl::getMenu() {
    return menu_;
}
uint32_t CookImpl::getChefNum() {
    return checf_num_;
}
Cook::Cook(int chef_num, const std::vector<std::string>& menu) {
    impl_ = new CookImpl(chef_num, menu);
}
Cook::~Cook() {
    delete impl_;
}
std::vector<std::string> Cook::getMenu() {
    return impl_->getMenu();
}
uint32_t Cook::getChefNum() {
    return impl_->getChefNum();
}

#pragma once
#include <unordered_map>
#include <vector>
#include <memory>
#include "cook_cuisine_imp.h"
// 后厨
class Cook {
public:
    Cook(int, const std::vector<std::string>&);
    ~Cook();
    std::vector<std::string> getMenu();     
    uint32_t getChefNum();                  
private:
    CookImplPtr impl_;
};
typedef std::shared_ptr<Cook> CookPtr;

#include "cook_cuisine.h"
Cook::Cook(int chef_num, const std::vector<std::string>& menu) {
    impl_.reset(new CookImpl(chef_num, menu));
}
Cook::~Cook() {
}
std::vector<std::string> Cook::getMenu() {
    return impl_->getMenu();
}
uint32_t Cook::getChefNum() {
    return impl_->getChefNum();
}

#pragma once
#include <vector>
#include <unordered_map>
#include <memory>
class CookImpl {
public:
    CookImpl(uint32_t checf_num, const std::vector<std::string>& menu):checf_num_(checf_num), menu_(menu) {}
    std::vector<std::string> getMenu();
    uint32_t getChefNum();
private:
    uint32_t checf_num_;
    std::vector<std::string> menu_;
};
typedef std::shared_ptr<CookImpl> CookImplPtr;

#include "cook_cuisine_imp.h"
std::vector<std::string> CookImpl::getMenu() {
    return menu_;
}
uint32_t CookImpl::getChefNum() {
    return checf_num_;
}

#include "cook_cuisine.h"
#include <iOStream>
using namespace std;    // Testing, 平时开发可千万别用这句
int main() {
    int checf_num = 10;
    const std::vector<std::string> menus = { "Chicken", "Beef", "Noodle", "Milk" };
    CookPtr cook(new Cook(checf_num, menus));
    auto cook_menu = cook->getMenu();
    auto cook_checf_num = cook->getChefNum();
    cout << "======================Chinese Cook======================\n";
    cout << "============Checf: " << cook_checf_num << " people\n";
    cout << "==========Menu\n";
    for (size_t i = 0; i < cook_menu.size(); i++) {
        cout << "============" << i + 1 << " : " << cook_menu[i] << "\n";
    }
    return 0;
}