用C ++ wstring枚举

Question

I have defined an enum like this:

enum eFeature
{
    eF_NONE=0,
    eF_PORT_A=1,
    eF_PORT_B=2,
    eF_PORT_C=3,
};

I would now like to convert a wstring (which is either "0", "1", "2" or "3") to eFeature.

I tried

eFeature iThis;
iThis = _wtoi(mystring.c_str());

But the compiler tells me "A value of type 'int' can not be assigned to an entity of the type eFeature."

Can somebody help? Thank you.

Answer 1

You are attempting to assign an int to an enum , which is not allowed. Leaving the wstring distraction aside, what you are doing is the equivalent of

eFeature iThis;
iThis = 42;

You first need to cast the int to the enum type:

eFeature iThis;
iThis = static_cast<eFeature>(42);

Obviously, you would need to perform some kind of range checking first.