137 lines
2.1 KiB
Markdown
137 lines
2.1 KiB
Markdown
# t00018 - Pimpl pattern
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## Config
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```yaml
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compilation_database_dir: ..
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output_directory: puml
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diagrams:
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t00018_class:
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type: class
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glob:
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- ../../tests/t00018/**.h
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- ../../tests/t00018/**.cc
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using_namespace:
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- clanguml::t00018
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include:
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namespaces:
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- clanguml::t00018
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```
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## Source code
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File t00018_impl.h
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```cpp
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#pragma once
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#include "t00018.h"
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namespace clanguml {
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namespace t00018 {
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namespace impl {
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class widget {
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int n;
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public:
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void draw(const clanguml::t00018::widget &w) const;
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void draw(const clanguml::t00018::widget &w);
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widget(int n);
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};
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}
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}
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}
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```
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File t00018.h
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```cpp
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#pragma once
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#include <experimental/propagate_const>
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#include <iostream>
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#include <memory>
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namespace clanguml {
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namespace t00018 {
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namespace impl {
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class widget;
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}
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// Pimpl example based on https://en.cppreference.com/w/cpp/language/pimpl
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class widget {
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std::unique_ptr<impl::widget> pImpl;
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public:
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void draw() const;
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void draw();
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bool shown() const { return true; }
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widget(int);
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~widget();
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widget(widget &&);
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widget(const widget &) = delete;
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widget &operator=(widget &&);
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widget &operator=(const widget &) = delete;
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};
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}
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}
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```
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File t00018.cc
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```cpp
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#include "t00018.h"
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#include "t00018_impl.h"
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namespace clanguml {
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namespace t00018 {
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void widget::draw() const { pImpl->draw(*this); }
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void widget::draw() { pImpl->draw(*this); }
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widget::widget(int n)
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: pImpl{std::make_unique<impl::widget>(n)}
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{
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}
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widget::widget(widget &&) = default;
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widget::~widget() = default;
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widget &widget::operator=(widget &&) = default;
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}
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}
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```
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File t00018_impl.cc
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```cpp
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#include "t00018_impl.h"
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#include "t00018.h"
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namespace clanguml {
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namespace t00018 {
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namespace impl {
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widget::widget(int n)
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: n(n)
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{
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}
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void widget::draw(const clanguml::t00018::widget &w) const
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{
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if (w.shown())
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std::cout << "drawing a const widget " << n << '\n';
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}
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void widget::draw(const clanguml::t00018::widget &w)
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{
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if (w.shown())
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std::cout << "drawing a non-const widget " << n << '\n';
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}
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}
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}
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}
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```
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## Generated UML diagrams
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