![](/img/trans.png)
[英]Initialize a container inside a class/struct with std::initializer_list
[英]Struct with `initializer_list` ctor inside union?
我有一個POD結構,但是為了方便起見,我希望它具有std::initializer_list
ctor。 默認ctor,copy ctor和dtor是隱式的。 但是,似乎使用initializer_list
ctor會使該結構不符合POD的資格,因此它不能在聯合體內:
#include<initializer_list>
struct A{
A(const std::initializer_list<int>&);
};
union{
A a;
} a;
gcc 4.6 --std = c ++ 0x:
error: use of deleted function ‘<anonymous union>::._0()’
error: ‘<anonymous union>::._0()’ is implicitly deleted because the default definition would be ill-formed:
error: no matching function for call to ‘A::A()’
周圍有沒有? 它與c ++ 11的無限制聯合功能有關嗎?
工會本身必須有一個明確的ctor-感謝本文 ):
union _u{
A a;
_u(){};
} a;
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.