t00099 - Test case for bridge design pattern using static polymorphism

Config

diagrams:
  t00099_class:
    type: class
    glob:
      - t00099.cc
    title: Bridge design pattern with static polymorphism
    include:
      namespaces:
        - clanguml::t00099
    using_namespace: clanguml::t00099

Source code

File tests/t00099/t00099.cc

#include <concepts>
#include <memory>
#include <string>
#include <variant>
#include <vector>
 
namespace clanguml {
namespace t00099 {
 
template <typename T>
concept Renderer = requires(
    T &t, double x, double y, double radius, double width, double height) {
    t.render_circle(x, y, radius);
    t.render_rectangle(x, y, width, height);
};
 
class VectorRenderer {
public:
    void render_circle(double x, double y, double radius) { }
    void render_rectangle(double x, double y, double width, double height) { }
 
    void set_stroke_width(double width) { stroke_width = width; }
    void set_fill_color(const std::string &color) { fill_color = color; }
 
private:
    double stroke_width{1.0};
    std::string fill_color{"black"};
};
 
class RasterRenderer {
public:
    void render_circle(double x, double y, double radius) { }
    void render_rectangle(double x, double y, double width, double height) { }
 
    void set_dpi(int dpi) { this->dpi = dpi; }
    void set_anti_aliasing(bool enabled) { anti_aliasing = enabled; }
 
private:
    int dpi{72};
    bool anti_aliasing{true};
};
 
template <Renderer R> class Shape {
public:
    explicit Shape(R renderer)
        : renderer_bridge_(std::move(renderer))
    {
    }
 
    virtual ~Shape() = default;
    virtual void draw() = 0;
    virtual void move(double dx, double dy) = 0;
 
protected:
    R renderer_bridge_;
    double x_{0.0};
    double y_{0.0};
};
 
template <Renderer R> class Circle : public Shape<R> {
public:
    Circle(R renderer, double radius)
        : Shape<R>(std::move(renderer))
        , radius_(radius)
    {
    }
 
    void draw() override
    {
        this->renderer_bridge_.render_circle(this->x_, this->y_, radius_);
    }
 
    void move(double dx, double dy) override
    {
        this->x_ += dx;
        this->y_ += dy;
    }
 
    void set_radius(double radius) { radius_ = radius; }
    double get_radius() const { return radius_; }
 
private:
    double radius_;
};
 
template <Renderer R> class Rectangle : public Shape<R> {
public:
    Rectangle(R renderer, double width, double height)
        : Shape<R>(std::move(renderer))
        , width_(width)
        , height_(height)
    {
    }
 
    void draw() override
    {
        this->renderer_bridge_.render_rectangle(
            this->x_, this->y_, width_, height_);
    }
 
    void move(double dx, double dy) override
    {
        this->x_ += dx;
        this->y_ += dy;
    }
 
    void set_dimensions(double width, double height)
    {
        width_ = width;
        height_ = height;
    }
 
    double get_width() const { return width_; }
    double get_height() const { return height_; }
 
private:
    double width_;
    double height_;
};
 
template <Renderer R> class DrawingApplication {
public:
    DrawingApplication(R renderer)
        : renderer_(std::move(renderer))
    {
    }
 
    void create_circle(double radius)
    {
        auto circle = std::make_unique<Circle<R>>(renderer_, radius);
        shapes_.push_back(std::move(circle));
    }
 
    void create_rectangle(double width, double height)
    {
        auto rectangle =
            std::make_unique<Rectangle<R>>(renderer_, width, height);
        shapes_.push_back(std::move(rectangle));
    }
 
    void draw_all()
    {
        for (const auto &shape : shapes_) {
            shape->draw();
        }
    }
 
    void move_all(double dx, double dy)
    {
        for (const auto &shape : shapes_) {
            shape->move(dx, dy);
        }
    }
 
private:
    R renderer_;
    std::vector<std::unique_ptr<Shape<R>>> shapes_;
};
 
using VectorApp = DrawingApplication<VectorRenderer>;
using RasterApp = DrawingApplication<RasterRenderer>;
 
struct App {
    std::variant<VectorApp, RasterApp> impl;
 
    static App make_vector_app() { return App{.impl = VectorRenderer{}}; }
 
    static App make_raster_app() { return App{.impl = RasterRenderer{}}; }
};
 
int main()
{
    auto app = App::make_vector_app();
 
    return 0;
}
 
} // namespace t00099
} // namespace clanguml

Generated PlantUML diagrams

Generated Mermaid diagrams

Generated JSON models

{
  "diagram_type": "class",
  "elements": [
    {
      "display_name": "Renderer<T>",
      "id": "9634615813666335298",
      "name": "Renderer",
      "namespace": "clanguml::t00099",
      "parameters": [
        {
          "name": "t",
          "type": "T &"
        },
        {
          "name": "x",
          "type": "double"
        },
        {
          "name": "y",
          "type": "double"
        },
        {
          "name": "radius",
          "type": "double"
        },
        {
          "name": "width",
          "type": "double"
        },
        {
          "name": "height",
          "type": "double"
        }
      ],
      "source_location": {
        "column": 9,
        "file": "t00099.cc",
        "line": 11,
        "translation_unit": "t00099.cc"
      },
      "statements": [
        "t.render_circle(x, y, radius)",
        "t.render_rectangle(x, y, width, height)"
      ],
      "type": "concept"
    },
    {
      "bases": [],
      "display_name": "VectorRenderer",
      "id": "3387176406646031341",
      "is_abstract": false,
      "is_nested": false,
      "is_struct": false,
      "is_template": false,
      "is_union": false,
      "members": [
        {
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          "is_static": false,
          "name": "stroke_width",
          "source_location": {
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            "file": "t00099.cc",
            "line": 26,
            "translation_unit": "t00099.cc"
          },
          "type": "double"
        },
        {
          "access": "private",
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          "name": "fill_color",
          "source_location": {
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            "file": "t00099.cc",
            "line": 27,
            "translation_unit": "t00099.cc"
          },
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        }
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            }
          ],
          "source_location": {
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            }
          ],
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          },
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            }
          ],
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        {
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          "parameters": [
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      "name": "RasterRenderer",
      "namespace": "clanguml::t00099",
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            },
            {
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              "type": "double"
            }
          ],
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          },
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        {
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