C ++-如果在循环中声明对象，则在循环结束时调用其析构函数吗? [英] C++ - If an object is declared in a loop, is its destructor called at the end of the loop?

问题描述

在C ++中，对象的析构函数在创建它的块的结尾处的}"处被调用，对吗?因此，这意味着如果我有:

In C++, an object's destructor is called at the closing "}" for the block it was created in, right? So this means that if I have:

while(some_condition)
{
    SomeClass some_object;
    some_object.someFunction();
    some_variable = some_object.some_member;
}

然后在循环的一次迭代中创建的对象的析构函数将在循环的结尾被调用，然后再创建另一个对象，对吗?

Then the destructor for the object created in one iteration of the loop will be called at the end of the loop before another object is created, correct?

谢谢.

推荐答案

是.

但是您可以自己测试一下.这是一种语言功能，编译器不太可能会出错.

But you could have tested it yourself. This is a language feature that compilers are unlikely to get wrong.

#include <iostream>

struct S {
  S() { std::cout << "S::S()\n"; }
  ~S() { std::cout << "S::~S()\n"; }
};

int main () {
  int i = 10;
  while(i--) {
    S s;
  }
}

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