List[Token])] { ... } 12. 13. // 返回函数代表的解析器 14. Parser(expression) 15. } 21 语法树之外：Tagless Final 计算表达式，除了⽣成为抽象语法树再解析，我们还可以有其他的选择 我们通过�⾏为�来进⾏抽象 1. trait Expr { 2. number(Int) -> Self 3. op_add(Self op_mul(Self, Self) -> Self 6. op_div(Self, Self) -> Self 7. } 接⼝的不同实现即是对⾏为的不同语义 22 语法树之外：Tagless Final 我们利⽤⾏为的抽象定义解析器 1. fn recursive_parser[E : Expr]() -> Parser[E] { 2. let number : Parser[E] = ptoken(fn recursive_parser().parse(token_list)? 18. Some(expr, rest_string, rest_token) 19. } 23 语法树之外：Tagless Final 我们可以提供不同的实现，获得不同的诠释 1. enum Expression { ... } derive(Debug) // 语法树实现 2. type BoxedInt Int derive(Debug)

int b; } params; union { initial_suspend_awaitable_t initial_suspend_awaitable; final_suspend_awaitable_t final_suspend_awaitable; }; }; task sum(int a, int b) { auto frame = make_unique<__sum_frame>(a int b; } params; union { initial_suspend_awaitable_t initial_suspend_awaitable; final_suspend_awaitable_t final_suspend_awaitable; }; }; task sum(int a, int b) { auto frame = make_unique<__sum_frame>(a int b; } params; union { initial_suspend_awaitable_t initial_suspend_awaitable; final_suspend_awaitable_t final_suspend_awaitable; }; }; task sum(int a, int b) { auto frame = make_unique<__sum_frame>(a

大纲 多态性 方法重载 关键字 static 关键字 final Java 应用与开发 面向对象编程进阶 PART2 王晓东 wangxiaodong@ouc.edu.cn 中国海洋大学 September 30, 2018 大纲 多态性 方法重载 关键字 static 关键字 final 学习目标 1. 理解多态和虚方法调用的概念，掌握其用法 2. 掌握方法重载的方法 3. 掌握 了解设计模式，掌握单例设计模式 5. 掌握 final 关键字的概念和使用方法 大纲 多态性 方法重载 关键字 static 关键字 final 大纲 多态性 方法重载 关键字 static 关键字 final 大纲 多态性 方法重载 关键字 static 关键字 final 接��� 多态性 方法重载 关键字 static 关键字 final 大纲 多态性 方法重载 关键字 static static 关键字 final 什么是多态？ 在 Java 中，子类的对象可以替代父类的对象使用称为多态。 O Java 引用变量与所引用对象间的类型匹配关系 ▶ 一个对象只能属于一种确定的数据类型，该类型自对象创建 直至销毁不能改变。 ▶ 一个引用类型变量可能引用（指向）多种不同类型的对象 ——既可以引用其声明类型的对象，也可以引用其声明类型 的子类的对象。 1 Person p =

kilo_ kilo; inline constexpr struct metre final : named_unit<"m", kind_of> {} metre; inline constexpr struct second final : named_unit<"s", kind_of> {} second; } CppCon kilo_ kilo; inline constexpr struct metre final : named_unit<"m", kind_of> {} metre; inline constexpr struct second final : named_unit<"s", kind_of> {} second; namespace kilo_ kilo; inline constexpr struct metre final : named_unit<"m", kind_of> {} metre; inline constexpr struct second final : named_unit<"s", kind_of> {} second; namespace

help us start as well as pack all the js files using webpack . The packed js files which are our final js file to be used is saved at the path /dev folder. To use webpack, we need to run npm run publish hold the folder in which the compiled file will be kept and the filename will tell the name of the final file to be used in your .html file. Module module: { rules: [ { value '@babel/preset-env’. It will transpile the code as per the ES environment you need. The final folder structure will be as follows: rxjsproj/ node_modules/ src/

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6.6. Adding header contents to the final page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . has shown us how Wicket maps components to HTML tags and how it uses both of them to generate the final HTML markup. In the last paragraph we had a first taste of Wicket links and we have seen how they tag can be used by both web developers and web designers to place some mock HTML to show how the final panel should look like. 5.3. Divide et impera! Let’s go back to our layout example. In chapter 5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 6.6. Adding header contents to the final page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . has shown us how Wicket maps components to HTML tags and how it uses both of them to generate the final HTML markup. In the last paragraph we had a first taste of Wicket links and we have seen how they tag can be used by both web developers and web designers to place some mock HTML to show how the final panel should look like. 5.3. Divide et impera! Let’s go back to our layout example. In chapter 5