C++11：class 初始化赋值顺序的主体

Question

假设我有一个 class 形式

class MyClass
{
    int a = 1;
    int b;
    int c;
    int d = 4;
    MyClass() : b(2)
    {
        c = 3;
    }
}

a,b,c,d的赋值顺序是什么？现在我确定（从旧的 C++ 中）b 将在 c 之前分配。但是对于后者，其他人呢？

Answer 1

来自[class.base.init]：

non-static data members are initialized in the order they were declared in the class definition (again regardless of the order of the mem-initializers).

在这种情况下，排序等同于：

int a = 1;
int b = 2;
int c;
int d = 4;
c = 3;