c++ - `int a = 0, b = a` 是否有未定义的行为？

Question

问题标题说明了一切:int a = 0, b = a 形式的声明是否具有未定义的行为？

Answer 1

不，这是明确定义的。这是一个带有两个声明符 a 和 b 的声明。每个声明器都有一个初始化器。

Each init-declarator in a declaration is analyzed separately as if it was in a declaration by itself.

也就是说，该行被视为:

int a = 0;
int b = a;