如何在初始化列表中初始化普通数组成员变量？

发布于 2024-12-06 00:52:30 字数 511 浏览 1 评论 0原文

我想执行以下操作：

class MyClass {
    public:
        MyClass() : arr({1,2,3,4,5,6,7,8}) {}

    private:
        uint32_t arr[8];
};

但它不起作用（编译器：“}”标记之前预期的主要表达式。）。我看过其他 SO 问题，人们正在传递诸如 std::initializer_list 之类的东西，并尝试有趣的事情，例如将数组初始值设定项放在双括号中，如下所示：

MyClass() : arr( {{1,2,3,4,5,6,7,8}} ) {}

但我不熟悉其目的std::initializer_list 并且我不太确定为什么上面的代码中有双大括号（尽管它无论如何都不起作用，所以我不确定为什么它很重要）。

有没有一种正常的方法可以在构造函数初始值设定项列表中实现我的 arr 变量的初始化？

原文

I would like to do the following:

class MyClass {
    public:
        MyClass() : arr({1,2,3,4,5,6,7,8}) {}

    private:
        uint32_t arr[8];
};

but it doesn't work (compiler: expected primary expression before '}' token.). I've looked at other SO questions and people were passing around things like std::initializer_list, and trying interesting things like placing the array initializer in double braces like so:

MyClass() : arr( {{1,2,3,4,5,6,7,8}} ) {}

but I'm unfamiliar with the purpose of std::initializer_list and also I'm not quite sure why there's double braces in the above code (though it doesn't work anyway, so I'm not sure why it matters).

Is there a normal way to achieve initialization of my arr variable in a constructor initializer list?

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