Example Code:
struct Shape {
void draw();
int area(int x, int y);
};
make_trait(Shape, draw, area);
int main() { auto circle = Circle(); auto square = Square(); // NOTE: all of this is strictly checked, so if you are creating // a trait out of a Object, the object MUST implement all the trait functions auto t0 = trait<Shape>::make(&circle); t0.draw();
auto t1 = trait<Shape>::make(&square);
t1.draw();
// Another thing to be kept in mind is trait<T> is just like a View
// It DOES NOT OWN anything, so you are the one making sure the data
// pointer is valid
auto array = std::array{t1, t0};
for (auto& shape : array) {
std::cout << shape.area(2, 3) << std::endl;
}
}