njlr

int f() {
  Foo foo;
  return foo.bar(); // foo automatically destroyed
}

njlr

int f() {
  Foo* foo = new Foo();
  int x = foo->bar();
  delete foo; // How inconvenient! 
  return x;
}

njlr

int f() {
  Foo* foo = new Foo();
  return foo->bar(); // Leak! 
}

njlr

int f() {
  Foo foo = new Foo();
  return foo.bar();
}

njlr

// Pseudo-code
struct VirtualTerminal {
  string buffer; // Currently visible output
 
  string computeTransition(string const& prev, string const& next) {
    const string deleteLine = "\e[2K\r\e[1A";
    return repeat(count("\n", prev), deleteLine()) + next;
  }
 
  VirtualTerminal flip(std::string const& str) const {

njlr

running task: download
progress(75%): [xxxxxxxxx ]
Tasks Done: 1/5: [x ]

njlr

running task: download
progress(50%): [xxxxxx ]
Tasks Done: 1/5: [x ]

njlr

struct Text {
  Style style; 
  std::string text;
  
  Image render() const {
    std::vector<Pixel> pixels(text.size(), Pixel{ style });
    for (int i = 0; i < text.size(); ++i) {
      pixels[i].c = text[i]; 
    }
    return Image{ width, height, pixels };

njlr

struct Renderable {
  virtual Image render(unsigned const width) const = 0;
  virtual ~Renderable() {}
};

template<class T>
struct Model : Renderable {
  
  T data;
  

njlr

enum class Color { /* ... */ };
enum class Font { /* ... */ };

struct Style {
  Color bg;
  Color fg;
  Font font;
};

struct Pixel {