Pimpl a.k.a (Pointer to implentation) 是一种现代C++技术，用于隐藏实现，尽量减少耦合，并分离接口。
为什么使用pimpl？
在软件开发中，使用Pimpl有一下三点好处
- 最小化编译依赖
- 实现接口和实现的分离
- 可移植性
Pimpl头文件
#ifndef IMPL_PERSON_H
#define IMPL_PERSON_H
#include <string>
#include <memory>
class Person {
public:
Person(std::string name);
~Person();
std::string GetAttributes();
private:
struct pImplPerson;
std::unique_ptr<pImplPerson> m_impl;
};
#endif // IMPL_PERSON_H
Pimpl实现
#include "person.h"
#include <iostream>
struct Person::pImplPerson {
std::string m_name;
std::string m_strength;
std::string m_speed;
};
Person::Person(std::string name) {
m_impl = std::make_unique<pImplPerson>();
m_impl->m_name = name;
m_impl->m_speed = "n/a";
m_impl->m_strength = "n/a";
}
Person::~Person() {}
std::string Person::GetAttributes() {
std::string retStr = "name: " + m_impl->m_name +
" speed: " + m_impl->m_speed +
" strength: " + m_impl->m_strength;
return retStr;
}
