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std::destroy

STD：摧毁

Defined in header ​​
template< class ForwardIt > void destroy( ForwardIt first, ForwardIt last (1)(since C++17)
template< class ExecutionPolicy, class ForwardIt > void destroy( ExecutionPolicy&& policy, ForwardIt first, ForwardIt last (2)(since C++17)

1%29摧毁范围内的物体[first, last)，好像

二次

for (; first != last; ++first)
  std::destroy_at(std::addressof(*first)

二次

2%29与%281%29相同，但根据policy此重载不参与过载解决，除非std::is_execution_policy_v<std::decay_t<ExecutionPolicy>>是真的。

参数

first, last-the range of elements to destroy
policy-the execution policy to use. See execution policy for details.

类型要求

---。

-不通过有效的Forward实例进行增量、赋值、比较或间接转换，否则会引发异常。

返回值

%280%29

复杂性

直线在之间的距离first和last...

例外

带有名为ExecutionPolicy报告错误如下：

  • 如果执行作为算法一部分调用的函数，则引发异常ExecutionPolicy是其中之一标准政策，，，std::terminate叫做。对于任何其他人ExecutionPolicy，行为是由实现定义的。

  • 如果算法不能分配内存，std::bad_alloc被扔了。

可能的实施

模板<类Forwardit>空销毁%28 Forwardit First，Forwardit持续%29(表示%28；First%21=Lest；++First%29 std：：[医]地址：：地址%28%2A第一%29%29；}

*。

例

另见

destroy_n (C++17)destroys a number of objects in a range (function template)
destroy_at (C++17)destroys an object at a given address (function template)

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在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

http：//en.cppreference.com/w/cpp/Memory/DECUTE

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