[英]Visual Studio checked iterator not throwing exceptions
I have this code: 我有这个代码:
#ifdef _DEBUG
#define _SECURE_SCL 1
#define _SECURE_SCL_THROWS 1
#else
#define _SECURE_SCL 0
#define _SECURE_SCL_THROWS 0
#endif
#include <iostream>
#include <vector>
using namespace std;
int main()
{
vector <int> v1;
v1.push_back(33);
vector <int>::iterator it1 = v1.begin();
try
{
it1++;
it1++;
}
catch (...)
{
cout << "vector is empty!!" << endl;
}
return 0;
}
A pretty simple one: I try to go past-the-boundary and I want the exception to be caught. 一个非常简单的问题:我试图超越边界,我想要捕获异常。 However the program simply crashes with a "Debug Assertion Failed!"
但是程序只是因为“Debug Assertion Failed!”而崩溃了。 on the second increment, why is that?
在第二个增量,为什么?
The example was taken from http://msdn.microsoft.com/en-us/library/aa985965(v=vs.100).aspx and I just added the macros to set the checked iterators on. 该示例来自http://msdn.microsoft.com/en-us/library/aa985965(v=vs.100).aspx ,我刚刚添加了宏来设置已检查的迭代器。 I'm in debug mode, /EHsc is on and so is /MDd
我处于调试模式,/ EHsc打开,因此/ MDd
You left the most important part out of your question -- the #include
lines. 你从问题中留下了最重要的部分 -
#include
行。
You need to put those macros ABOVE the #include
lines. 您需要将这些宏放在
#include
行之上。 If you're using precompiled headers, you need to put them in the precompiled header. 如果您正在使用预编译头,则需要将它们放在预编译头中。
Because the code in your question is not complete, I can't tell if you've done this right. 因为你问题中的代码不完整,我不知道你是否做得对。 I suspect you haven't, so I'm offering this as an answer.
我怀疑你没有,所以我提供这个答案。
The new version of Visual C++'s library (bundled in Visual Studio 2010) doesn't support throwing exceptions from checked iterators. 新版本的Visual C ++库(捆绑在Visual Studio 2010中)不支持从已检查的迭代器中抛出异常。 See http://wishmesh.com/2010/04/it-seems-that-_secure_scl_throws-is-deprecated-in-visual-studio-c-2010/
见http://wishmesh.com/2010/04/it-seems-that-_secure_scl_throws-is-deprecated-in-visual-studio-c-2010/
A checked iterator refers to an iterator that will throw an exception or call invalid_parameter if you attempt to move past the boundaries of the container.
已检查的迭代器是指如果您尝试移过容器边界,将抛出异常或调用invalid_parameter的迭代器。
Your example code isn't moving an iterator, so I don't think it makes sense that anything would be thrown. 你的示例代码没有移动迭代器,所以我认为不会抛出任何东西是有道理的。
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