#include "polymorphism.hpp"

namespace oop {

auto total_area(const std::vector<std::unique_ptr<Shape>>& shapes) -> double {
    double total = 0.0;
    for (const auto& shape : shapes) {
        total += shape->area();
    }
    return total;
}

auto shape_names(const std::vector<std::unique_ptr<Shape>>& shapes)
    -> std::vector<std::string> {
    std::vector<std::string> names;
    for (const auto& shape : shapes) {
        names.push_back(shape->name());
    }
    return names;
}

auto Counter::copies() -> int { return copies_; }

}  // namespace oop