記錄：關於三目運算符 ？ ：

原創 趴在树上写代码的猫 2020-06-23 00:38 
x ? y : z;
// 如果y/z是有返回值的函數，會再調用一遍 y/z 返回值類型對應的拷貝構造
// 即使前面沒有寫賦值語句
// 用這種方式代替if的時候還需要關心一下拷貝構造裏面做了什麼

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