CppCoreGuidelines NL.7 名字的长短和其作用范围匹配
23 January 2024
“Make the length of a name roughly proportional to the length of its scope”
理由
越大的作用域范围，会容易出现混淆和不小心的名字冲突。
例子
double sqrt(double x); // return the square root of x; x must be non-negative int length(const char* p); // return the number of characters in a zero-terminated C-style string int length_of_string(const char zero_terminated_array_of_char[]) // bad: verbose int g; // bad: global variable with a cryptic name int open; // bad: global variable with a short, popular name
用 p 做指针，用 x 做浮点变量是常见的约定，不太会产生混淆。