Google C++ Style Guide学习笔记——命名

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本文详细介绍了C++编程中的命名规则、文件命名、类型名、变量名、const变量名、函数名、枚举命名等核心内容，旨在提供一份全面的C++编程指南。

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1、一般性规则

函数名、变量名、文件名应当是描述性的，避免使用缩写词。

2、文件名

文件名应当全部小写，可以使用下划线'_'或者破折号'-'，优先使用下划线。

C++文件应当以.cc结尾

3、类型名

类型名（包括classes、structs、typedefs、enums）以大写字母开头，每个单词首字母大写，不要使用下划线。

4、变量名

变量名全部使用小写，单词与单词之间使用下划线。类的成员变量使用trailing underscores。举例：

Common Variable names

For example:

 string table_name;  // OK - uses underscore.
 string tablename;   // OK - all lowercase.

 string tableName;   // Bad - mixed case.

Class Data Members
Data members (also called instance variables or member variables) are lowercase with optional underscores like regular variable names, but always end with a trailing underscore.
  
   string table_name_;  // OK - underscore at end.
string tablename_;   // OK.
  
Struct Variables
Data members in structs should be named like regular variables without the trailing underscores that data members in classes have.
  
   struct UrlTableProperties {
  string name;
  int num_entries;
}
  
See Structs vs. Classes for a discussion of when to use a struct versus a class.
Global Variables
There are no special requirements for global variables, which should be rare in any case, but if you use one, consider prefixing it with g_ or some other marker to easily distinguish it from local variables.

5、const 变量名

以字母'k'开头，后接首字母大写的大小写混合单词。如：kDaysInAWeek.

6、函数名

常规函数名：常规函数名应该首字母大写，每个单词以大写字母开头，不使用下划线。如

  	AddTableEntry()
  	DeleteUrl()
  	OpenFileOrDie()

 Accessors and Mutators
Accessors and mutators (get and set functions) should match the name of the variable they are getting and setting. This shows an excerpt of a class whose instance variable is num_entries_.
 
  class MyClass {
 public:
  ...
  int num_entries() const { return num_entries_; }
  void set_num_entries(int num_entries) { num_entries_ = num_entries; }

 private:
  int num_entries_;
};
 
You may also use lowercase letters for other very short inlined functions. For example if a function were so cheap you would not cache the value if you were calling it in a loop, then lowercase naming would be acceptable.
7、枚举命名：
	像consts或macros一样命名。尽量像consts。