如何处理 C++ 中的 bad_alloc? [英] How to deal with bad_alloc in C++?

问题描述

有一个名为 foo 的方法有时会返回以下错误:

There is a method called foo that sometimes returns the following error:

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
Abort

有没有办法可以使用 try-catch 块来阻止此错误终止我的程序(我想做的就是返回 -1)?

Is there a way that I can use a try-catch block to stop this error from terminating my program (all I want to do is return -1)?

如果是，它的语法是什么?

If so, what is the syntax for it?

我还能如何处理 C++ 中的 bad_alloc?

How else can I deal with bad_alloc in C++?

推荐答案

您可以像捕获任何其他异常一样捕获它:

You can catch it like any other exception:

try {
  foo();
}
catch (const std::bad_alloc&) {
  return -1;
}

从这一点开始，您可以做哪些有用的事情取决于您，但从技术上讲，这绝对是可行的.

Quite what you can usefully do from this point is up to you, but it's definitely feasible technically.

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