Postfix Self Expression

A postfix self expression consists of an expression or the name of a type, immediately followed by .self. It has the following forms:

  • expression.self
  • type.self

The first form evaluates to the value of the expression. For example, x.self evaluates to x.

The second form evaluates to the value of the type. Use this form to access a type as a value. For example, because SomeClass.self evaluates to the SomeClass type itself, you can pass it to a function or method that accepts a type-level argument.

GRAMMAR OF A SELF EXPRESSION

postfix-self-expression → postfix-expression­.­self­

 

https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Expressions.html#//apple_ref/swift/grammar/postfix-self-expression

Postfix Self Expression的更多相关文章

  1. Postfix to Prefix Conversion & Prefix to Postfix Conversion

    Postfix to Prefix Conversion Postfix: An expression is called the postfix expression if the operator ...

  2. Java表达式中的那些坑

    [1]您确定真正了解后缀表达式与前缀表达式的区别吗? public class IncrementDemo{ public static void main(String[] args) { int ...

  3. Swift中的反射

    原文:http://www.cocoachina.com/applenews/devnews/2014/0623/8923.html Swift 事实上是支持反射的.只是功能略弱. 本文介绍主要的反射 ...

  4. Swift - what's the difference between metatype .Type and .self?

    Declaration typealias AnyClass = AnyObject.Type .Type The metatype of a class, structure, or enumera ...

  5. Infix to Postfix Expression

    Example : Infix : (A+B) * (C-D) ) Postfix: AB+CD-* 算法: 1. Scan the infix expression from left to rig ...

  6. Evaluate Math Expression

    Evaluate Math Expression eryar@163.com 摘要Abstract:本文简要介绍了数学表达式解析求值的几款开源软件,并结合程序代码说明了OpenCascade中表达式包 ...

  7. Infix to postfix conversion 中缀表达式转换为后缀表达式

    Conversion Algorithm 1.操作符栈压入"#": 2.依次读入表达式的每个单词: 3.如果是操作数则压入操作数栈: 4.如果是操作符,则将操作符栈顶元素与要读入的 ...

  8. Postfix to Infix

    Infix expression: The expression of the form a op b. When an operator is in-between every pair of op ...

  9. AutoMapper：Unmapped members were found. Review the types and members below. Add a custom mapping expression, ignore, add a custom resolver, or modify the source/destination type

    异常处理汇总-后端系列 http://www.cnblogs.com/dunitian/p/4523006.html 应用场景:ViewModel==>Mode映射的时候出错 AutoMappe ...

随机推荐

  1. centos7关闭防火墙以及查看防火墙状态

    1.关闭firewall:systemctl stop firewalld.service #停止firewall systemctl disable firewalld.service #禁止fir ...

  2. 亚马逊免费服务器搭建Discuz!论坛过程(一)

    1:申请 目前亚马逊服务器免费12个月,需要一张信用卡即可免费注册领取. 地址:https://aws.amazon.com/cn/free/ 2: 创建实例 2.1进入控制台:https://ap- ...

  3. 【hihocoder 1475】 数组分拆

    [题目链接]:http://hihocoder.com/problemset/problem/1475 [题意] _< [题解] /* 别人的题解 首先对于每个位置预处理数组的前缀和,即s[i] ...

  4. fzu 2136

    #include<stdio.h> #define inf 1000000000 #define N 110000 int a[N]; struct node { int start,en ...

  5. 百度之星2014复赛 - 1002 - The Query on the Tree

    先上题目: The Query on the Tree Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (J ...

  6. Python学习-生成器 - Generator

    简单来说,generator是一个能够返回迭代器对象的函数. yield的使用: 在python中,当你定义一个函数,使用了yield关键字时,这个函数就是一个生成器,它的执行会和其他普通的函数有很多 ...

  7. LINQ体验(8)——LINQ to SQL语句之Union All/Union/Intersect和Top/Bottom和Paging和SqlMethods

    我们继续解说LINQ to SQL语句,这篇我们来讨论Union All/Union/Intersect操作和Top/Bottom操作和Paging操作和SqlMethods操作 . Union Al ...

  8. Android - 找到当前类的Context

    找到当前类的Context 本文地址: http://blog.csdn.net/caroline_wendy 假设是在onContinueCreate或onCreate中, 直接使用this, 就代 ...

  9. Java学习需要掌握的一些知识

    Java学习需要掌握的一些知识: <一>1.Jvm 部分Jvm 内存模型.Jvm 内存结构.Jvm 参数调优.Java 垃圾回收<二>Java 基础部分1.必须会使用 List ...

  10. mysql配置文件夹错误：在安装mysql 5.6.19 时运行cmake命令是出现CMake Error: The source directory does not appear to contai

    在安装mysql 5.5.xx 时运行cmake命令是出现CMake Error: The source directory does not appear to contain CMakeLists ...