随着C++11和allocator_traits中的void_pointer和const_void_pointer类型别名的出现，这种需求消失了。但是，...
};public:StlAlloc() =default; ~StlAlloc() =default;T *allocate(size_type n, std::allocator<void>::const_pointer hint=0){ std::cout << __FUNCTION__ <<" "<< n <<" "<<this<< std::endl;returnstatic_cast<T *>(operatornew(sizeof(T) * n)); }voiddeallocate(T *p, size_type...
error: ‘__s_getMD5Sum’ is not a member of ‘boost::shared_ptr<const test::gps_<std::allocator<void>,程序员大本营,技术文章内容聚合第一站。
std::allocator Defined in header<memory> template<classT> structallocator; (1) template<> structallocator<void>; (2)(deprecated in C++17) (removed in C++20) Thestd::allocatorclass template is the defaultAllocatorused by all standard library containers if no user-specified allocator is provided...
void deallocate(pointer p, size_type n) { if (source_ != NULL && p == source_->stack_buffer()) source_->used_stack_buffer_ = false; else std::allocator<T>::deallocate(p, n); } Run Code Online (Sandbox Code Playgroud)How*_*ant 6 有几种方法可以解决这个问题,但一种方法并不适...
(T))); } } void deallocate(T* p, std::size_t n) noexcept { std::cout<< "deallocate" << " " << p << " " << n << std::endl; ::operator delete(p); } }; auto main()->int { using alloc_t = DebugAllocator<char>; using str_t = std::basic_string< char, std::...
用布置 new ,在 p 所指的未初始化存储中构造 T 类型对象。1) 调用 new((void *)p) T(val) 2) 调用 ::new((void *)p) U(std::forward<Args>(args)...) 参数 p - 指向未初始化存储的指针 val - 用作复制构造函数参数的值 args... - 所用的构造函数参数 返回值 (无) 参阅 construct[静态...
template<> struct allocator<void>; (2) (C++17 中弃用) (C++20 中移除) std::allocator 类模板是所有标准库容器所用的默认分配器 (Allocator) ,若不提供用户指定的分配器。默认分配器无状态,即任何给定的 allocator 实例可交换、比较相等,且能解分配同一 allocator 类型的任何其他实例所分配的内存。 对voi...
template<> struct allocator<void>; (2) (C++17 中弃用) (C++20 中移除) std::allocator 类模板是所有标准库容器所用的默认分配器 (Allocator) ,若不提供用户指定的分配器。默认分配器无状态,即任何给定的 allocator 实例可交换、比较相等,且能解分配同一 allocator 类型的任何其他实例所分配的内存。 对voi...
std::allocator Defined in header<memory> template<classT> structallocator; (1) template<> structallocator<void>; (2)(deprecated in C++17) (removed in C++20) Thestd::allocatorclass template is the defaultAllocatorused by all standard library containers if no user-specified allocator is provided...