/**
 * @name 享元模式
 * @brief: 高效共享大量细粒度对象
 * @note 场景：文本编辑器字符格式、游戏粒子系统
 */

class CharacterStyle {
public:
    CharacterStyle(const std::string& font, int size, bool bold)
        : font(font), size(size), bold(bold) {}
    // 风格属性...
private:
    std::string font;
    int size;
    bool bold;
};

class StyleFactory {
public:
    CharacterStyle* getStyle(const std::string& font, int size, bool bold) {
        std::string key = font + std::to_string(size) + (bold ? "b" : "");
        if (styles.find(key) == styles.end()) {
            styles[key] = new CharacterStyle(font, size, bold);
        }
        return styles[key];
    }
private:
    std::unordered_map<std::string, CharacterStyle*> styles;
};

class TextCharacter {
public:
    TextCharacter(char c, CharacterStyle* style) 
        : character(c), style(style) {}
private:
    char character;
    CharacterStyle* style;  // 共享的样式对象
};