05_OOb: Anfang Bearbeitung MP

src/05_OO/b/CMakeLists.txt

@@ -1,31 +1,7 @@
 add_executable(05_OOb_MP
-        MP/shapes_main.cpp
-        MP/Shape.cpp
-        MP/Position.h
-        MP/Shape.h
-        MP/Point.cpp
-        MP/Point.h
-        MP/Circle.cpp
-        MP/Circle.h
-        MP/Rectangle.cpp
-        MP/Rectangle.h
-        MP/Scene.cpp
-        MP/Scene.h
-        ../../helpers/AnsiConsole.cpp
+        MP/main_mp4_OO_b.cpp
         )
 
 add_executable(05_OOb_Testat
-        Testat/shapes_main.cpp
-        Testat/Shape.cpp
-        Testat/Position.h
-        Testat/Shape.h
-        Testat/Point.cpp
-        Testat/Point.h
-        Testat/Circle.cpp
-        Testat/Circle.h
-        Testat/Rectangle.cpp
-        Testat/Rectangle.h
-        Testat/Scene.cpp
-        Testat/Scene.h
-        ../../helpers/AnsiConsole.cpp
+        Testat/main_mp4_OO_b.cpp
         )

src/05_OO/b/MP/Circle.cpp

@@ -1,26 +0,0 @@
-#include "Circle.h"
-#include <cmath>
-
-Circle::Circle(int x, int y, int radius, Colors color) : Shape(Position(x, y), color) {
-    _radius = radius;
-}
-
-void Circle::draw() {
-    /* see https://de.wikibooks.org/wiki/Formelsammlung_Mathematik:_Geometrie
-     * Höhensatz des Euklid
-     * */
-    int x_start = position.x - _radius / 2;
-    int x_stop = position.x + _radius / 2;
-
-    for (int i = x_start; i <= x_stop; i++) {
-        double x_relative = double(i) - double(x_start);
-        double h = sqrt(x_relative * (x_stop - x_start - x_relative));
-        ansiConsole.printText(position.x + int(x_relative) - _radius / 2,
-                              static_cast<int>(position.y + h), "#",
-                              color);
-        ansiConsole.printText(position.x + int(x_relative) - _radius / 2,
-                              static_cast<int>(position.y - h), "#",
-                              color);
-
-    }
-}

src/05_OO/b/MP/Circle.h

@@ -1,14 +0,0 @@
-#ifndef C_C_CIRCLE_H
-#define C_C_CIRCLE_H
-
-#include "Shape.h"
-
-class Circle : public Shape{
-protected:
-    int _radius;
-public:
-    explicit Circle(int x = 0, int y = 0, int radius = 0, Colors color = Colors::GREEN);
-    void draw() override;
-};
-
-#endif //C_C_CIRCLE_H

src/05_OO/b/MP/Point.cpp

@@ -1,8 +0,0 @@
-#include "Point.h"
-
-Point::Point(int x, int y, Colors color) : Shape(Position(x, y), color) {
-}
-
-void Point::draw() {
-    ansiConsole.printText(position.x, position.y, "*", color);
-}

src/05_OO/b/MP/Point.h

@@ -1,14 +0,0 @@
-#ifndef C_C_POINT_H
-#define C_C_POINT_H
-
-#include "Shape.h"
-
-class Point : public Shape{
-
-public:
-    explicit Point(int x, int y, Colors color);
-    void draw() override;
-};
-
-
-#endif

src/05_OO/b/MP/Position.h

@@ -1,14 +0,0 @@
-#ifndef C_C_POSITION_H
-#define C_C_POSITION_H
-
-struct Position {
-    int x;
-    int y;
-
-    explicit Position(int x_ = 0, int y_ = 0) {
-        x = x_;
-        y = y_;
-    }
-};
-
-#endif

src/05_OO/b/MP/Rectangle.cpp

@@ -1,23 +0,0 @@
-#include "Rectangle.h"
-
-Rectangle::Rectangle(int x, int y, int width, int height, Colors color) : Shape(Position(x, y), color) {
-    this->width = width;
-    this->height = height;
-}
-
-void Rectangle::draw() {
-    int x_start = position.x - (width / 2);
-    int x_stop = position.x + (width / 2);
-
-    int y_start = position.y - (height / 2);
-    int y_stop = position.y + (height / 2);
-
-    for(int i = x_start; i <= x_stop; i++) {
-        ansiConsole.printText(i, position.y - (height / 2), "#", color);
-        ansiConsole.printText(i, position.y + (height / 2), "#", color);
-    }
-    for(int i = y_start; i< y_stop; i++) {
-        ansiConsole.printText(position.x + (width / 2), i, "#", color);
-        ansiConsole.printText(position.x - (width / 2), i, "#", color);
-    }
-}

src/05_OO/b/MP/Rectangle.h

@@ -1,18 +0,0 @@
-#include "Shape.h"
-
-#ifndef C_C_RECTANGLE_H
-#define C_C_RECTANGLE_H
-
-
-class Rectangle : public Shape{
-protected:
-    int width;
-    int height;
-
-public:
-    explicit Rectangle(int x = 0, int y = 0, int width = 0, int height = 0, Colors color = Colors::WHITE);
-    void draw() override;
-};
-
-
-#endif //C_C_RECTANGLE_H

src/05_OO/b/MP/Scene.cpp

@@ -1,19 +0,0 @@
-#include "Scene.h"
-#include <vector>
-
-Scene::Scene(std::vector<Shape*> shapes) : shapes(std::move(shapes)) {
-
-}
-
-void Scene::draw() {
-    ansiConsole.clearScreen();
-    for(Shape* shape : shapes) {
-        shape->draw();
-    }
-}
-
-Scene::~Scene() {
-    for(Shape* shape : shapes) {
-        delete shape;
-    }
-}

src/05_OO/b/MP/Scene.h

@@ -1,17 +0,0 @@
-#include <vector>
-#include "Shape.h"
-
-#ifndef C_C_SCENE_H
-#define C_C_SCENE_H
-
-class Scene {
-private:
-    std::vector<Shape*> shapes;
-public:
-    explicit Scene(std::vector<Shape*> shapes);
-    void draw();
-    ~Scene();
-};
-
-
-#endif //C_C_SCENE_H

src/05_OO/b/MP/Shape.cpp

@@ -1,9 +0,0 @@
-#include "Position.h"
-#include "Shape.h"
-
-Shape::Shape(Position position, Colors color) {
-    this->position = position;
-    this->color = color;
-}
-
-Shape::~Shape() = default;

src/05_OO/b/MP/Shape.h

@@ -1,17 +0,0 @@
-#ifndef C_C_SHAPE_H
-#define C_C_SHAPE_H
-
-#include "../../../helpers/AnsiConsole.h"
-#include "Position.h"
-
-class Shape {
-protected:
-    Position position;
-    Colors color;
-public:
-    Shape(Position position, Colors color);
-    virtual ~Shape();
-    virtual void draw() = 0;
-};
-
-#endif

src/05_OO/b/MP/main_mp4_OO_b.cpp

@@ -0,0 +1,220 @@
+//  file main_mp4_OO_b.cpp
+#include <iostream>
+#include <cassert>
+
+//=======================================
+
+struct FooVal {
+    FooVal(int initialValue=0);
+    ~FooVal();
+private:
+    int _someValue;
+};
+
+//=======================================
+
+class FooBase {
+    FooVal _value;
+public:
+    FooBase();
+    FooBase(int initialValue);
+    virtual ~FooBase();
+};
+
+//=======================================
+
+class FooDerived : public FooBase {
+  int _ival;
+public:
+    FooDerived(int initialValue);
+    ~FooDerived();
+};
+
+//=======================================
+
+class Bar {
+    FooBase *_helperObject;
+public:
+    Bar();
+    ~Bar();
+};
+
+//=======================================
+
+FooVal::FooVal(int initialValue)
+: _someValue(initialValue)
+{
+    std::cout << "FooVal::FooVal()" << std::endl;
+}
+
+FooVal::~FooVal(){
+    std::cout << "FooVal::~FooVal()" << std::endl;
+}
+
+FooBase::FooBase(){
+    std::cout << "FooBase::FooBase()" << std::endl;
+}
+
+FooBase::FooBase(int initialValue)
+: _value(initialValue)
+{
+    std::cout << "FooBase::FooBase(int)" << std::endl;
+}
+
+FooBase::~FooBase(){
+    std::cout << "FooBase::~FooBase(" << std::endl;
+}
+
+FooDerived::FooDerived(int initialValue)
+: FooBase(initialValue), _ival(0)
+{
+    std::cout << "FooDerived::FooDerived()" << std::endl;
+}
+
+FooDerived::~FooDerived(){
+    std::cout << "FooDerived::~FooDerived()" << std::endl;
+}
+
+Bar::Bar(){
+    _helperObject =  new FooDerived(0);
+}
+
+Bar::~Bar(){
+    delete _helperObject;
+}
+
+
+struct StackObject {
+private:
+    void* operator new(size_t size) noexcept {
+        bool noStackObjectOnHeap = false;
+        assert(noStackObjectOnHeap);
+        return nullptr;
+    }
+};
+
+
+struct A : public StackObject {
+    A(){std::cout << "+A ";}
+    //A(const A&){std::cout << "+A";}
+    ~A(){std::cout << "-A ";}
+};
+
+struct B : public StackObject {
+    B(){std::cout << "+B ";}
+    //B(const B&){std::cout << "+B";}
+    ~B(){std::cout << "-B ";}
+};
+
+
+struct C : public StackObject {
+    C(){std::cout << "+C ";}
+    //C(const C&){std::cout << "+C";}
+    ~C(){std::cout << "-C ";}
+};
+
+class HeapObject{
+public:
+    void*   operator new (size_t size);
+    HeapObject();
+    virtual ~HeapObject();
+    static bool assertionsHold();
+protected:
+private:
+    static int ctorCount;
+    static int dtorCount;
+    static int newCount;
+    //    static void remove(HeapObject *);
+    HeapObject(const HeapObject&) = delete;
+    HeapObject& operator=(const HeapObject&) = delete;
+};
+
+int HeapObject::ctorCount = 0;
+int HeapObject::dtorCount = 0;
+int HeapObject::newCount  = 0;
+
+void*   HeapObject::operator new (size_t size){
+    newCount++;
+    return new char[size];
+}
+
+HeapObject::HeapObject(){
+    ctorCount++;
+}
+
+HeapObject::~HeapObject(){
+    dtorCount++;
+}
+
+bool HeapObject::assertionsHold(){
+    assert(ctorCount == newCount);   // all objects have been allocated on heap
+    assert(ctorCount == dtorCount);  // all objects have been deleted
+    return true;
+}
+
+
+class K : public HeapObject
+{
+public:
+  K(){std::cout << "+K ";}
+    ~K(){std::cout << "-K ";}
+};
+
+class L {
+public:
+  L(){std::cout << "+L ";}
+  ~L(){std::cout << "-L ";}
+};
+
+
+class M {
+public:
+    M(){std::cout << "+M ";}
+    ~M(){std::cout << "-M ";}
+};
+
+void pattern1() {
+    B b;
+    {
+        C c;
+    }
+    A a;
+}
+
+void pattern2() {
+   B b;
+   C c;
+   A a;
+
+}
+
+
+
+
+int main(int argc, const char * argv[]) {
+
+  Bar * bar = new Bar();
+  // ...
+  delete bar; // implies "delete _helperObject";
+
+  FooBase *obj = new FooDerived(7);
+  delete obj;
+
+  {
+    C c;
+    K* k = new K();
+    delete k;
+  }
+
+  HeapObject::assertionsHold();
+  std::cout << " ENDE" << std::endl;
+
+  pattern1();
+  std::cout << std::endl;
+  pattern2();
+
+  return 0;
+}
+
+
+

src/05_OO/b/MP/shapes_main.cpp

@@ -1,34 +0,0 @@
-#include <vector>
-#include "Shape.h"
-#include "Point.h"
-#include "Circle.h"
-#include "Rectangle.h"
-#include "Scene.h"
-
-int main(int argc, char **argv) {
-    std::vector<Shape*> shapes;
-
-    shapes.push_back(new Point(30, 10, Colors::RED));
-    shapes.push_back(new Point(28, 8, Colors::BLUE));
-    shapes.push_back(new Point(32, 8, Colors::BLUE));
-
-
-    shapes.push_back(new Circle(30, 10, 10, Colors::WHITE));
-    shapes.push_back(new Circle(30, 20, 15, Colors::GREEN));
-
-
-    shapes.push_back(new Rectangle(5, 21, 10, 10, Colors::MAGENTA));
-
-    shapes.push_back(new Point(5, 10, Colors::WHITE));
-    shapes.push_back(new Point(15, 7, Colors::WHITE));
-    shapes.push_back(new Point(7, 5, Colors::WHITE));
-
-
-    auto *s = new Scene(shapes);
-    s->draw();
-
-    delete s;
-
-
-    return 0;
-}

src/05_OO/b/Testat/Circle.cpp

@@ -1,26 +0,0 @@
-#include "Circle.h"
-#include <cmath>
-
-Circle::Circle(int x, int y, int radius, Colors color) : Shape(Position(x, y), color) {
-    _radius = radius;
-}
-
-void Circle::draw() {
-    /* see https://de.wikibooks.org/wiki/Formelsammlung_Mathematik:_Geometrie
-     * Höhensatz des Euklid
-     * */
-    int x_start = position.x - _radius / 2;
-    int x_stop = position.x + _radius / 2;
-
-    for (int i = x_start; i <= x_stop; i++) {
-        double x_relative = double(i) - double(x_start);
-        double h = sqrt(x_relative * (x_stop - x_start - x_relative));
-        ansiConsole.printText(position.x + int(x_relative) - _radius / 2,
-                              static_cast<int>(position.y + h), "#",
-                              color);
-        ansiConsole.printText(position.x + int(x_relative) - _radius / 2,
-                              static_cast<int>(position.y - h), "#",
-                              color);
-
-    }
-}

src/05_OO/b/Testat/Circle.h

@@ -1,14 +0,0 @@
-#ifndef C_C_CIRCLE_H
-#define C_C_CIRCLE_H
-
-#include "Shape.h"
-
-class Circle : public Shape{
-protected:
-    int _radius;
-public:
-    explicit Circle(int x = 0, int y = 0, int radius = 0, Colors color = Colors::GREEN);
-    void draw() override;
-};
-
-#endif //C_C_CIRCLE_H

src/05_OO/b/Testat/Point.cpp

@@ -1,8 +0,0 @@
-#include "Point.h"
-
-Point::Point(int x, int y, Colors color) : Shape(Position(x, y), color) {
-}
-
-void Point::draw() {
-    ansiConsole.printText(position.x, position.y, "*", color);
-}

src/05_OO/b/Testat/Point.h

@@ -1,14 +0,0 @@
-#ifndef C_C_POINT_H
-#define C_C_POINT_H
-
-#include "Shape.h"
-
-class Point : public Shape{
-
-public:
-    explicit Point(int x, int y, Colors color);
-    void draw() override;
-};
-
-
-#endif

src/05_OO/b/Testat/Position.h

@@ -1,14 +0,0 @@
-#ifndef C_C_POSITION_H
-#define C_C_POSITION_H
-
-struct Position {
-    int x;
-    int y;
-
-    explicit Position(int x_ = 0, int y_ = 0) {
-        x = x_;
-        y = y_;
-    }
-};
-
-#endif

src/05_OO/b/Testat/Rectangle.cpp

@@ -1,23 +0,0 @@
-#include "Rectangle.h"
-
-Rectangle::Rectangle(int x, int y, int width, int height, Colors color) : Shape(Position(x, y), color) {
-    this->width = width;
-    this->height = height;
-}
-
-void Rectangle::draw() {
-    int x_start = position.x - (width / 2);
-    int x_stop = position.x + (width / 2);
-
-    int y_start = position.y - (height / 2);
-    int y_stop = position.y + (height / 2);
-
-    for(int i = x_start; i <= x_stop; i++) {
-        ansiConsole.printText(i, position.y - (height / 2), "#", color);
-        ansiConsole.printText(i, position.y + (height / 2), "#", color);
-    }
-    for(int i = y_start; i< y_stop; i++) {
-        ansiConsole.printText(position.x + (width / 2), i, "#", color);
-        ansiConsole.printText(position.x - (width / 2), i, "#", color);
-    }
-}

src/05_OO/b/Testat/Rectangle.h

@@ -1,18 +0,0 @@
-#include "Shape.h"
-
-#ifndef C_C_RECTANGLE_H
-#define C_C_RECTANGLE_H
-
-
-class Rectangle : public Shape{
-protected:
-    int width;
-    int height;
-
-public:
-    explicit Rectangle(int x = 0, int y = 0, int width = 0, int height = 0, Colors color = Colors::WHITE);
-    void draw() override;
-};
-
-
-#endif //C_C_RECTANGLE_H

src/05_OO/b/Testat/Scene.cpp

@@ -1,19 +0,0 @@
-#include "Scene.h"
-#include <vector>
-
-Scene::Scene(std::vector<Shape*> shapes) : shapes(std::move(shapes)) {
-
-}
-
-void Scene::draw() {
-    ansiConsole.clearScreen();
-    for(Shape* shape : shapes) {
-        shape->draw();
-    }
-}
-
-Scene::~Scene() {
-    for(Shape* shape : shapes) {
-        delete shape;
-    }
-}

src/05_OO/b/Testat/Scene.h

@@ -1,17 +0,0 @@
-#include <vector>
-#include "Shape.h"
-
-#ifndef C_C_SCENE_H
-#define C_C_SCENE_H
-
-class Scene {
-private:
-    std::vector<Shape*> shapes;
-public:
-    explicit Scene(std::vector<Shape*> shapes);
-    void draw();
-    ~Scene();
-};
-
-
-#endif //C_C_SCENE_H

src/05_OO/b/Testat/Shape.cpp

@@ -1,9 +0,0 @@
-#include "Position.h"
-#include "Shape.h"
-
-Shape::Shape(Position position, Colors color) {
-    this->position = position;
-    this->color = color;
-}
-
-Shape::~Shape() = default;

src/05_OO/b/Testat/Shape.h

@@ -1,17 +0,0 @@
-#ifndef C_C_SHAPE_H
-#define C_C_SHAPE_H
-
-#include "../../../helpers/AnsiConsole.h"
-#include "Position.h"
-
-class Shape {
-protected:
-    Position position;
-    Colors color;
-public:
-    Shape(Position position, Colors color);
-    virtual ~Shape();
-    virtual void draw() = 0;
-};
-
-#endif

src/05_OO/b/Testat/main_mp4_OO_b.cpp

@@ -0,0 +1,198 @@
+//  file main_mp4_OO_b.cpp
+#include <iostream>
+#include <cassert>
+
+//=======================================
+
+struct FooVal {
+    FooVal(int initialValue=0);
+    ~FooVal();
+private:
+    int _someValue;
+};
+
+//=======================================
+
+class FooBase {
+    FooVal _value;
+public:
+    FooBase();
+    FooBase(int initialValue);
+    virtual ~FooBase();
+};
+
+//=======================================
+
+class FooDerived : public FooBase {
+  int _ival;
+public:
+    FooDerived(int initialValue);
+    ~FooDerived();
+};
+
+//=======================================
+
+class Bar {
+    FooBase *_helperObject;
+public:
+    Bar();
+    ~Bar();
+};
+
+//=======================================
+
+FooVal::FooVal(int initialValue)
+: _someValue(initialValue)
+{
+    std::cout << "FooVal::FooVal()" << std::endl;
+}
+
+FooVal::~FooVal(){
+    std::cout << "FooVal::~FooVal()" << std::endl;
+}
+
+FooBase::FooBase(){
+    std::cout << "FooBase::FooBase()" << std::endl;
+}
+
+FooBase::FooBase(int initialValue)
+: _value(initialValue)
+{
+    std::cout << "FooBase::FooBase(int)" << std::endl;
+}
+
+FooBase::~FooBase(){
+    std::cout << "FooBase::~FooBase(" << std::endl;
+}
+
+FooDerived::FooDerived(int initialValue)
+: FooBase(initialValue), _ival(0)
+{
+    std::cout << "FooDerived::FooDerived()" << std::endl;
+}
+
+FooDerived::~FooDerived(){
+    std::cout << "FooDerived::~FooDerived()" << std::endl;
+}
+
+Bar::Bar(){
+    _helperObject =  new FooDerived(0);
+}
+
+Bar::~Bar(){
+    delete _helperObject;
+}
+
+
+struct StackObject {
+private:
+    void* operator new(size_t size) noexcept {
+        bool noStackObjectOnHeap = false;
+        assert(noStackObjectOnHeap);
+        return nullptr;
+    }
+};
+
+
+struct A : public StackObject {
+    A(){std::cout << "+A ";}
+    //A(const A&){std::cout << "+A";}
+    ~A(){std::cout << "-A ";}
+};
+
+struct B : public StackObject {
+    B(){std::cout << "+B ";}
+    //B(const B&){std::cout << "+B";}
+    ~B(){std::cout << "-B ";}
+};
+
+
+struct C : public StackObject {
+    C(){std::cout << "+C ";}
+    //C(const C&){std::cout << "+C";}
+    ~C(){std::cout << "-C ";}
+};
+
+class HeapObject{
+public:
+    void*   operator new (size_t size);
+    HeapObject();
+    virtual ~HeapObject();
+    static bool assertionsHold();
+protected:
+private:
+    static int ctorCount;
+    static int dtorCount;
+    static int newCount;
+    //    static void remove(HeapObject *);
+    HeapObject(const HeapObject&) = delete;
+    HeapObject& operator=(const HeapObject&) = delete;
+};
+
+int HeapObject::ctorCount = 0;
+int HeapObject::dtorCount = 0;
+int HeapObject::newCount  = 0;
+
+void*   HeapObject::operator new (size_t size){
+    newCount++;
+    return new char[size];
+}
+
+HeapObject::HeapObject(){
+    ctorCount++;
+}
+
+HeapObject::~HeapObject(){
+    dtorCount++;
+}
+
+bool HeapObject::assertionsHold(){
+    assert(ctorCount == newCount);   // all objects have been allocated on heap
+    assert(ctorCount == dtorCount);  // all objects have been deleted
+    return true;
+}
+
+
+class K : public HeapObject
+{
+public:
+  K(){std::cout << "+K ";}
+    ~K(){std::cout << "-K ";}
+};
+
+class L {
+public:
+  L(){std::cout << "+L ";}
+  ~L(){std::cout << "-L ";}
+};
+
+
+class M {
+public:
+    M(){std::cout << "+M ";}
+    ~M(){std::cout << "-M ";}
+};
+
+
+
+int main(int argc, const char * argv[]) {
+  Bar * bar = new Bar();
+  // ...
+  delete bar; // implies "delete _helperObject";
+
+  FooBase *obj = new FooDerived(7);
+  delete obj;
+
+  {
+    C c;
+    K* k = new K();
+    delete k;
+  }
+
+  HeapObject::assertionsHold();
+  std::cout << " ENDE" << std::endl;
+  return 0;
+}
+
+
+

src/05_OO/b/Testat/shapes_main.cpp

@@ -1,34 +0,0 @@
-#include <vector>
-#include "Shape.h"
-#include "Point.h"
-#include "Circle.h"
-#include "Rectangle.h"
-#include "Scene.h"
-
-int main(int argc, char **argv) {
-    std::vector<Shape*> shapes;
-
-    shapes.push_back(new Point(30, 10, Colors::RED));
-    shapes.push_back(new Point(28, 8, Colors::BLUE));
-    shapes.push_back(new Point(32, 8, Colors::BLUE));
-
-
-    shapes.push_back(new Circle(30, 10, 10, Colors::WHITE));
-    shapes.push_back(new Circle(30, 20, 15, Colors::GREEN));
-
-
-    shapes.push_back(new Rectangle(5, 21, 10, 10, Colors::MAGENTA));
-
-    shapes.push_back(new Point(5, 10, Colors::WHITE));
-    shapes.push_back(new Point(15, 7, Colors::WHITE));
-    shapes.push_back(new Point(7, 5, Colors::WHITE));
-
-
-    auto *s = new Scene(shapes);
-    s->draw();
-
-    delete s;
-
-
-    return 0;
-}