cannot able to create enum type as atomic

Question

#include <iostream>
#include <atomic>
using namespace std;    
typedef enum day{sun =0, mon, tue}day;    

int main() {
    atomic<day> a(sun);
    cout<<a<<endl;
    return 0;
}

The above code try to create a enum variable as atomic type. But i am getting the following error.

undefined reference to std::atomic<day>::operator day() const

Does atomic have no support for enum type? or any mistake in my syntax? I am using g++ compiler running on 32 bit ubuntu 12.0.4 machine. thank you.

There's no need for the C-idiomatic `typedef enum` in C++, although I doubt that's the issue here. — Bathsheba, Jun 25 '15 at 09:23
Which g++ version? I can only repro on Wandbox with GCC 4.6. — T.C., Jun 25 '15 at 09:31
I'd say this is a compiler bug. `atomic` can be used for all plain old data types and that includes enumerations. — Bathsheba, Jun 25 '15 at 09:32
The non-specialized `atomic` base template isn't implemented until GCC 4.7. — T.C., Jun 25 '15 at 09:40
How are you invoking your compiler? `atomic` was introduced in c++11 so make sure you're passing the `--std=c++11` or the `--std=c++0x` to `g++` — anthonyvd, Jun 25 '15 at 19:05
@AnthonyVallée-Dubois i am passing --std=c++0x to the compiler. — Kumar, Jun 26 '15 at 04:02
Related: http://stackoverflow.com/questions/21756457/how-can-i-create-an-atomic-enum-in-c — Class Skeleton, Nov 18 '15 at 10:33

score 1 · Answer 1 · edited Jun 26 '15 at 04:19

1

I've compiled the same code with the online compiler that supports C++11 & C++14. I didn't get any issues.

atomic isn't available before C++11 standards.

For your reference: http://ideone.com/fork/Pe4gVt

edited Jun 26 '15 at 04:19

nhahtdh

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answered Jun 25 '15 at 10:30

MKR Harsha

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what is the compiler you used? mine is g++ 4.6.3. – Kumar Jun 25 '15 at 10:41

cannot able to create enum type as atomic

1 Answers1