C++ Enum in struct error for definition

Question

Hello im a newbie from C++. For a my project i need to use a enum value similar C# example.

My Struct

struct Rows
{
    string name;
    bool primaryKey;
    int lenght;
    string defined;
    MyLDC::Attributes attrib;
    bool Nullable;
    bool AutoIncrement;
    string comment;

};
Rows rw;
Rows* row = &rw;

MyLDC::Attributes

enum Attributes
{
    _BINARY = 0x26,
    _UNSIGNED = 0x27
};

My Example function

void MyLDC::CreateTable(string tablename,string primaryKey)
{

    //Simple Row Implementation
    row->name = "Example Row";
    row->AutoIncrement = true;
    row->primaryKey = true;
    row->comment = "Example Row";

    row->attrib = Attributes::_UNSIGNED;

I get error on row->attrib = Attributes::_UNSIGNED;

no have idea for this error. who are the correct solution?

And what error do you get? Please include the full error, complete and unedited, in the question body. — Some programmer dude
– Some programmer dude, Commented Oct 28, 2016 at 10:06
Unrelated to your error, symbol names starting with an underscore and followed by an upper-case letter are reserved for the implementation (compiler and standard library). See e.g. this old SO answer for more information. — Some programmer dude
– Some programmer dude, Commented Oct 28, 2016 at 10:07

Mr.C64 · Accepted Answer · 2016-10-28 10:09:03Z

1

enum Attributes
{
    _BINARY = 0x26,
    _UNSIGNED = 0x27
};
...
row->attrib = Attributes::_UNSIGNED;

My psychic debugging powers ;) tell me that the problem is that the _UNSIGNED symbol is not under the scope of Attributes, so you should be able to do:

row->attrib = _UNSIGNED;

For scoped enums you may want to use C++11's enum class.

P.S. Note also that _Upper (underscore followed by uppercase letter) names are reserved for implementations, and should not be used in your code.

answered Oct 28, 2016 at 10:09

Mr.C64

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2 Comments

Mr.C64 Over a year ago

@JoeMartiniello: Glad to be of some help. I've been there before as well :)

Saurav Sahu Over a year ago

Sorry I didn't get. It seems to be working in my case: ideone.com/4KyrH6 What different I am doing?

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