Is there any way to get the visual studio compiler to emit a warning for this C++ code?

Question

I'd really like to track down bugs of this sort, I don't really care if I get warnings if DoNothing actually does modify the value. Using VS2019, if that makes any difference.

void DoNothing(int&){}

int GetUninitializedInt()
{
    // uninitialized 
    int x;

    DoNothing(x);

    // still uninitialized, compiled with /Wall gives no warning
    return x;
}

question from:https://stackoverflow.com/questions/66052500/is-there-any-way-to-get-the-visual-studio-compiler-to-emit-a-warning-for-this-c

Answer 1

Actually, the C++ compiler cannot catch such errors. You could only avoid such mistakes artificially. Therefore, I suggest that you increase the warning level to avoid this error as much as possible by setting Properties->C/C++->General->Warning Level.

For this question, you could modify the code:

void DoNothing(const int&){}

//Or

void DoNothing(int){}