Multiple attributes with the same enum labels result in a compile error [C++]

Created by: t-b

I'm trying to add DevEnum labels to TangoTest. But if I duplicate some of the labels I get compile errors ala

In file included from TangoTestStateMachine.cpp:38:0:
./TangoTest.h:79:2: error: redeclaration of ‘_A’
  _A,
  ^~
In file included from TangoTestClass.cpp:48:0:
./TangoTest.h:79:2: error: redeclaration of ‘_A’
  _A,
  ^~
./TangoTest.h:71:2: note: previous declaration ‘TangoTest_ns::_devenum_scalar_wEnum _A’
  _A,
  ^~
./TangoTest.h:71:2: note: previous declaration ‘TangoTest_ns::_devenum_scalar_wEnum _A’
  _A,
  ^~

An example is here -> https://github.com/t-b/TangoTest/tree/pogo-issue-duplicated-dev-num.

A couple of options spring to mind:

• Fold multiple enums being identical into one definition
• Use C++11 enum classes
• Add a surrounding namespace a la

namespace devenum_scalar_wEnum {
  enum _devenum_scalar_wEnum {
	_A,
	_B,
	_C,
	_D,
  } ;
  typedef _devenum_scalar_wEnum devenum_scalar_wEnum;
}

I think option 3 is the most feasible one.