The common idiom of "prohibiting copying" can now be expressed directly:
class X {
// ...
X& operator=(const X&) = delete; // Disallow copying
X(const X&) = delete;
};
[...]
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
};
参考资料：
http://stackoverflow.com/questions/5513881/meaning-of-delete-after-function-declaration
网友评论