TRY / CATCH_ALL vs try / catch [英] TRY/CATCH_ALL vs try/catch

问题描述

我一直在使用c ++，我熟悉正常的try / catch。然而，我现在发现自己在Windows上，编码在VisualStudio中用于COM开发。代码的几个部分使用如下：

I've been using c++ for a while, and I'm familiar with normal try/catch. However, I now find myself on Windows, coding in VisualStudio for COM development. Several parts of the code use things like:

TRY {
    ... do stuff
} CATCH_ALL(e) {
    ... issue a warning
}
END_CATCH_ALL;

这些宏的意义是什么？

What's the point of these macros? What benefit do they offer over the built-in try/catch?

我试过搜索这个，但try vs TRY很难搜索。

I've tried googling this, but "try vs TRY" is hard to search for.

推荐答案

这是一个MFC宏：

http://msdn.microsoft.com/en-us/library/t8dwzac0%28VS.71%29.aspx

此页面表示，从MFC 1.0恢复一个残余 - 在新代码中使用正常的C ++异常：

This page says they're a remnant from MFC 1.0 - use normal C++ exceptions in new code:

低于3.0的MFC版本不支持C ++异常机制。 MFC提供了处理异常的宏。

MFC versions lower than 3.0 did not support the C++ exception mechanism. MFC provided macros to deal with exceptions.

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