C++核心准则​​ES.61:使用delete[]销毁数组，使用delete销毁对象

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