函数声明后删除的含义 [英] Meaning of = delete after function declaration

问题描述

class my_class
{
    ...
    my_class(my_class const &) = delete;
    ...
};

= delete ？

是否有任何其他修饰符（ = 0 和 = delete ）？

Are there any other "modifiers" (other than = 0 and = delete)?

推荐答案

删除函数一个C ++ 11功能：

禁止复制的常用形式现在可以直接用
表示：

The common idiom of "prohibiting copying" can now be expressed directly:

class X {
    // ...
    X& operator=(const X&) = delete;  // Disallow copying
    X(const X&) = delete;
};

[...]

删除机制可用于任何功能。例如，我们
可以消除不想要的转换，例如：

The "delete" mechanism can be used for any function. For example, we can eliminate an undesired conversion like this:

struct Z {
    // ...

    Z(long long);     // can initialize with an long long         
    Z(long) = delete; // but not anything less
};

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