void* align( std::size_t alignment, std::size_t size, void*& ptr, std::size_t& space ); (C++11 起) 给定指针 ptr 指定大小为 space 的缓冲区,返回按指定 alignment 为size 字节数对齐的指针,并减小 space 参数对齐所用的字节数。返回首个对齐的地址。 仅以给定对齐量对齐入缓冲区的所需字...
(std::size_t a = alignof(T)) { if (std::align(a, sizeof(T), p, sz)) { T* result = reinterpret_cast<T*>(p); p = (char*)p + sizeof(T); sz -= sizeof(T); return result; } return nullptr; } }; int main() { MyAllocator<64> a; std::cout << "a.data 分配于 ...
std::add_volatile std::align std::aligned_alloc std::aligned_storage std::aligned_union std::alignment_of std::align_val_t std::allocate_shared std::allocator_arg std::allocator_arg_t std::any std::any::any std::any::emplace std::any::has_value std::any::reset std::any::swap ...
成员名称 说明 AbsBottom 图像的下边缘与同一行中最大元素的下边缘对齐。 AbsMiddle 图...
std::align_val_t al) { //static_assert( false,"we NOT permit larger align than alignof(std::max_align_t)"); std::cout << "larger align " << std::to_underlying(al) << std::endl; std::cout << sz << std::endl; std::cout << sizeof(Data) << std::endl; std::cout <...
stdalign.h -对齐stdalign.h 头文件定义与 C11 (ISO/IEC 9899:2011) 标准中引入的对齐相关联的宏: 阿利尼亚斯 阿利尼奥 __alignas_is_defined __alignof_is_defined父主题: C/C++ 头文件
在某些C++標準連結庫實作中,此標頭包含 C 標準連結庫標頭<stdalign.h>,並將相關聯的名稱新增至std命名空間。 因為該標頭未在 MSVC 中實作,因此<cstdalign>標頭會定義相容性巨集__alignas_is_defined和__alignof_is_defined。 注意 <stdalign.h>因為標頭會定義C++中關鍵詞的巨集,包括它沒有任何作用。 標頭<...
(x86)\Microsoft Visual Studio 2022\VC\Tools\MSVC\14.38.33130\include\vcruntime_new.h:27:16: error: 'std::align_val_t' has different definitions in different modules; defined here first difference is enum with specified type 'size_t' (aka 'unsigned long long') 27 | enum class align_...
std::align_val_t Defined in header<new> enumclassalign_val_t:std::size_t{}; (since C++17) Bothnew-expressionanddelete-expression, when used with objects whose alignment requirement is greater than__STDCPP_DEFAULT_NEW_ALIGNMENT__, pass that alignment requirement as an argument of typestd::...
stdalign.h Thestdalign.hheader file defines macros that are associated with alignment, which is introduced in the C11 (ISO/IEC 9899:2011) standard: alignasalignof__alignas_is_defined__alignof_is_defined