C++核心准则ES.61:使用delete[]销毁数组,使用delete销毁对象
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·
2020-05-21 23:21
ES.61: Delete arrays using delete[] and non-arrays using delete
ES.61:使用delete[]销毁数组,使用delete销毁对象
Reason(原因)
That's what the language requires and mistakes can lead to resource release errors and/or memory corruption.
这是C++语言的要求,如果用错会导致资源释放错误或者内存破坏。
Example, bad(反面示例)
void f(int n)
{
auto p = new X[n]; // n default constructed Xs
// ...
delete p; // error: just delete the object p, rather than delete the array p[]
}
Note(注意)
This example not only violates the no naked new rule as in the previous example, it has many more problems.
示例代码不仅违反了前面示例中的禁止暴露的new规则,还有更多其他错误。
Enforcement(实施建议)
If the new and the delete are in the same scope, mistakes can be flagged.
如果new和delete同属一个作用域,错误可以被标记。
If the new and the delete are in a constructor/destructor pair, mistakes can be flagged.
如果new和delete分别位于构造函数和析构函数,错误可以被标记。
原文链接
https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#es61-delete-arrays-using-delete-and-non-arrays-using-delete
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