Enum error: expected identifier before numeric constant

Question

I added a file in source control which had an enum definition as:

enum { OK = 0, ERROR };

But on compilation it was throwing errors like "expected identifier before numeric constant." Did my research on that and the culprit was supposed to be 'OK' which was defined somewhere else in the code. So, i changed OK with say, OK_1, and the issue was, indeed, resolved.

However, I have not been able to find where in my code base was this 'OK' defined before. I ran a grep from top level and couldn't find it. I am pretty sure I have covered all the application related code, but OK wasn't there.

I think it's unlikely that it was a part of some shared library as compilation process didn't even reach linking phase. It could have come from one of the header files maybe.

Is there a way/linux tool that somehow can be tricked to find where this OK is coming from?

Looks like you need pre-processor output stackoverflow.com/questions/4900870/… — Sameer Naik
– Sameer Naik, Commented Aug 4, 2016 at 5:48
Your project directory structure is flat? If it isn't it's unlikely grep will find anything. You should run grep from within a find command — StoryTeller - Unslander Monica
– StoryTeller - Unslander Monica, Commented Aug 4, 2016 at 6:01

Wielki_i_niezlomny · Accepted Answer · 2016-08-04 13:50:09Z

4

If you are using C++ 11 take a look at enum class: http://www.cprogramming.com/c++11/c++11-nullptr-strongly-typed-enum-class.html

One big draw back of enum is that you cant have 2 enums with the same name. With enum class this draw back is gone, you can write thing like this:

enum class Color {RED, GREEN, BLUE}; 
enum class Feelings {EXCITED, MOODY, BLUE};

And later on in the code:

Color color = Color::GREEN;
if ( Color::RED == color )
{
    // the color is red
}

Code example is pasted from linked www page

edited Aug 4, 2016 at 13:50

answered Aug 4, 2016 at 6:13

Wielki_i_niezlomny

1315 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Community · Accepted Answer · 2017-05-23 10:28:38Z

3

Converting my comment to answer.

Looks like you need pre-processor output Can gcc output C code after preprocessing?

edited May 23, 2017 at 10:28

CommunityBot

11 silver badge

answered Aug 4, 2016 at 7:29

Sameer Naik

1,4001 gold badge14 silver badges33 bronze badges

Collectives™ on Stack Overflow

Enum error: expected identifier before numeric constant

2 Answers 2

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related