简体繁体 English

为什么std :: allocator :: deallocate不是noexcept？

[英]Why is std::allocator::deallocate not noexcept?

原文 2018-10-24 22:06:07 5 1 c++/ c++11/ c++14/ c++17

The C++ specification (ISO/IEC 14882:2011 + ISO/IEC 14882:2014) defines in Table 28 — Allocator requirements for deallocate: C ++规范（ISO / IEC 14882：2011 + ISO / IEC 14882：2014）在表28中定义了解除分配的分配器要求：

All n T objects in the area pointed to by p shall be destroyed prior to this call. p指向的区域中的所有n个T对象应在此呼叫之前销毁。 n shall match the value passed to allocate to obtain this memory. n应匹配传递给allocate的值以获取此内存。 Does not throw exceptions. 不抛出异常。

But why is deallocate still not noexcept? 但为什么deallocate仍然不是 noexcept？

1 个解决方案

这是狭窄的契约（例如，如果你传递一个未通过allocate返回的指针，则会导致未定义的行为），因此根据标准库的通常策略，它不会标记为noexcept。

为什么std :: allocator :: deallocate需要一个大小？ - why does std::allocator::deallocate require a size?

std::allocator 释放部分内存 - std::allocator deallocate part of memory

std :: allocator中“destroy”“析构函数”“deallocate”之间的区别？ - Difference between “destroy” “destructor” “deallocate” in std::allocator?

为什么 std::exchange 不是 noexcept？ - Why is std::exchange not noexcept?

为什么std :: allocator <> :: deallocate（）有一个未使用的size_type参数？ - Why does std::allocator<>::deallocate() have a size_type parameter which is not used?

为什么std :: allocator是模板？ - Why is std::allocator a template?

std :: allocator的第二个参数的目的是什么 <T> ::取消分配？ - What is the purpose of the second parameter to std::allocator<T>::deallocate?

std :: allocator <_Ty> :: deallocate：无法将参数1从'X'转换为'Y' - std::allocator<_Ty>::deallocate : cannot convert parameter 1 from 'X' to 'Y'

std::allocator deallocate 不使用大小参数 - std::allocator deallocate don't use size argument

为什么std :: mutex :: unlock（）不是noexcept - Why is std::mutex::unlock() not noexcept

暂无

暂无

声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

相关问题 为什么std :: allocator :: deallocate需要一个大小？ - why does std::allocator::deallocate require a size? std::allocator 释放部分内存 - std::allocator deallocate part of memory std :: allocator中“destroy”“析构函数”“deallocate”之间的区别？ - Difference between “destroy” “destructor” “deallocate” in std::allocator? 为什么 std::exchange 不是 noexcept？ - Why is std::exchange not noexcept? 为什么std :: allocator <> :: deallocate（）有一个未使用的size_type参数？ - Why does std::allocator<>::deallocate() have a size_type parameter which is not used? 为什么std :: allocator是模板？ - Why is std::allocator a template? std :: allocator的第二个参数的目的是什么 <T> ::取消分配？ - What is the purpose of the second parameter to std::allocator<T>::deallocate? std :: allocator <_Ty> :: deallocate：无法将参数1从'X'转换为'Y' - std::allocator<_Ty>::deallocate : cannot convert parameter 1 from 'X' to 'Y' std::allocator deallocate 不使用大小参数 - std::allocator deallocate don't use size argument 为什么std :: mutex :: unlock（）不是noexcept - Why is std::mutex::unlock() not noexcept

相关标签

粤ICP备18138465号 © 2020-2024 STACKOOM.COM