Minimal Structure
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// header
// Widget.hpp
#pragma once
#include <memory>
class Widget {
public:
Widget();
~Widget();
void doSomething();
// (Rule of five if you need copy/move; omitted for brevity)
private:
struct Impl;
std::unique_ptr<Impl> pImpl;
};
In source file, we can have all the implementation in here to reduce recompilation-time upon changes (since this is a compilation unit and its code is compiled once per change).
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// Widget.cpp
#include "Widget.hpp"
#include <iostream>
// 1) Define the Impl struct in the .cpp so its details stay hidden:
struct Widget::Impl {
void doSomethingImpl() {
std::cout << "Widget::Impl doing work\n";
}
};
// 2) Forward all Widget methods to Impl:
Widget::Widget() : pImpl(std::make_unique<Impl>()) {}
Widget::~Widget() = default;
void Widget::doSomething() {
pImpl->doSomethingImpl();
}
Is pimpl worth it??
I forgot the return keywrod. Then I was stuck at the assocaited abort for 1h+. So please be aware that pimpl boiler plate could be a source of bugs
```cpp NavState IEKFLIO::IEKFLIO::get_current_state() const { impl_->get_current_state(); } `
