错误c4996已检查的迭代器

Question

我使用VC++ 2013,我有以下代码:

#pragma warning(disable:4996)
#define D_SCL_SECURE_NO_WARNINGS

#include <iostream>
#include <fstream>
#include <object.pb.h>

using namespace std;

int main(int argc, char** argv)
{
    Object object;
    object.set_id(1);
    object.set_name("Ermolaev Ivan");
    object.set_vertex(300.0f);
    fstream output("myfile", ios::out | ios::binary);
    object.SerializeToOstream(&output);
    return 0x0;
}

但继续显示以下错误.

Error   1   error C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'   c:\program files (x86)\microsoft visual studio 12.0\vc\include\xutility 2132    1   ProtobufTest

Answer 1

如果你使用selfmaden迭代器然后typedef iterator _Unchecked_type; 在自定义迭代器内部,使microsoft std库信任它是checket.

class iterator: public std::iterator<std::input_iterator_tag, const uint8_t>
{
public:

    typedef iterator _Unchecked_type;
// your implementation here
}

Answer 2

该D前缀是没有必要的,它是编译器的指示灯,当你介绍在命令行上的定义.

你应该简单地定义它_SCL_SECURE_NO_WARNINGS.最好这样做Project Properties -> C++ -> Preprocessor,以使其在所有代码中保持一致.