Type alias （C++11 起）

 

C++

语言

概念

实用工具库

字符串库

集装箱库

算法库

迭代器库

Numerics库

输入/输出库

本地化库

正则表达式库 （C++11）

原子操作库 （C++11）

线程的支持库 （C++11）

 

C + +语言

大会的主题 Original: General topics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
预处理器 评论 关键字	ASCII表 转义序列 C + +的历史
流量控制 Original: Flow control The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
条件执行语句 Original: Conditional execution statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
if statement	switch statement
迭代语句 Original: Iteration statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
for loop range-for loop （C++11）	while loop do-while loop
跳转语句 Original: Jump statements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
continue statement break statement	goto statement return statement
功能 Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
函数声明
lambda函数的声明
函数模板
的历史。内嵌说明
异常规范 （过时了）
noexcept说明 （C++11）
例外 Original: Exceptions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
扔表达	try-catch块
命名空间 Original: Namespaces The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
命名空间声明	命名空间的别名
类型 Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
基本类型 复合类型 枚举类型	联合类型 函数类型
decltype specifier （C++11）
规范 Original: Specifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
CV符
存储时间说明符
constexpr说明 （C++11）
汽车符 （C++11）
alignas说明 （C++11）
初始化 Original: Initialization The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
默认的初始化 值初始化 零初始化 复制初始化 直接初始化	集合初始化 表初始化 （C++11） 常数初始化 参考电压的初始化

常 Original: Literals The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
整数文字 字符文字 浮点文字 字符串文字	布尔文字 nullptr （C++11） 用户定义的 （C++11）
表达式 Original: Expressions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
价值类型 为了评价	运营商 运算符的优先级
另一种表示形式
实用工具 Original: Utilities The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
类型 Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
typedef declaration
声明类型别名 （C++11）
属性 （C++11）
施放 Original: Casts The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
隐式转换
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
C-风格和功能转换
内存分配 Original: Memory allocation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
new expression	delete expression
类 Original: Classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
类的声明 this pointer 访问符	朋友说明 初始化列表
类特定的功能特性 Original: Class-specific function properties The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
虚函数 覆盖说明 （C++11） 最后说明 （C++11）	明确的 （C++11） 静态的
特殊的成员函数 Original: Special member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
默认构造函数 拷贝构造函数 移动的构造函数 （C++11）	复制的任务 移动分配 （C++11） 析构函数
模板 Original: Templates The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
类模板
函数模板
模板特化
参数包 （C++11）
杂项 Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
内联汇编

 

类型别名类似类型定义，但是，使用模板的优势.

Original:

Type aliases are similar to 类型定义, however, have the advantage of working with templates.

The text has been machine-translated via Google Translate.
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语法

using identifier = type_name;

的例子

using flags = std::ios_base::fmtflags;
using func = void (*) (int,int);
// typedef std::ios_base::fmtflags flags;
// typedef void (*func)(int, int);
 
template<class T> using ptr = T*;
ptr<int> x;
 
template<class T> using vec = std::vector<T>;
vec<float> w;
 
// type alias used to hide some template parameter 
template<class CharT> using mystring = std::basic_string<CharT,std::char_traits<CharT>>;
mystring<char> str;
 
// type alias used to simplify the syntax of std::enable_if
template< class Condition >
using EnableIf = Invoke<std::enable_if<Condition::value>>;
 
template <typename T, typename = EnableIf<std::is_polymorphic<T>>>
int f(T t);