的std ::数组的矢量 [英] std::vector of an array

问题描述

下面的声明通过编译检查：

Following declaration passes compilation check:

int arr[3];
vector<int[3]> vec;  // ok !!

当尝试使用 VEC 几乎为，

vec.push_back(arr);

这会导致很多错误，如：

it results in many error like:

/usr/include/c++/4.6/ext/new_allocator.h:108:9: error: ISO C++ forbids initialization in array new [-fpermissive]
/usr/include/c++/4.6/bits/vector.tcc:314:4: error: invalid array assignment 
/usr/include/c++/4.6/ext/new_allocator.h:118:30: error: request for member ‘~int [3]’ in ‘* __p’, which is of non-class type ‘int [3]’

此外， VEC 不的push_back（）的为int * 也。

到底出了什么吗？在C ++ 11正在解决这样的问题？

What exactly goes wrong here ? Is such issue being addressed in C++11 ?

推荐答案

您不能存储阵列的容器，因为它们既不分配，也不拷贝的，这是为与标准库容器中使用的所有对象的要求。

You can't store arrays in containers because they are neither assignable nor copyable, which are the requirements for all objects that are used with Standard Library containers.

赋值运算符是唯一的尝试，当你做的push_back（）这就是为什么你的code 编译没有它

The assignment operator is only attempted when you do push_back() which is why your code compiles without it.

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