std::max_align_t

来自cppreference.com

 
 
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Defined in header <cstddef>
typedef /*implementation-defined*/ max_align_t;
(C++11 起)
std::max_align_t是一個POD類型的對齊要求至少是嚴格的(大),每標量類型.
Original:
std::max_align_t is a POD type whose alignment requirement is at least as strict (as large) as that of every scalar type.
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[编辑] 注釋

返回的指針分配的功能,如std::malloc適當的任何對象對齊,這意味著他們至少對齊嚴格std::max_align_t.
Original:
Pointers returned by allocation functions such as std::malloc are suitably aligned for any object, which means they are aligned at least as strict as std::max_align_t.
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std::max_align_t通常是最大的標量類型,這是long double在大多數平台上,並對齊要求是8或16的代名詞.....
Original:
std::max_align_t is usually synonymous with the largest scalar type, which is long double on most platforms, and its alignment requirement is either 8 or 16.
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[编辑] 為例

#include <iostream>
#include <cstddef>
int main()
{
    std::cout << alignof(std::max_align_t) << '\n';
}

Output:

16

[编辑] 另請參閱

alignof operator queries alignment requirements of a type (C++11 起) [edit]
(C++11)
獲得該類型的對齊要求
Original:
obtains the type's alignment requirements
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(類模板) [edit]
(C++11)
如果一個類型的檢查是標量類型
Original:
checks if a type is scalar type
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(類模板) [edit]