enum {A=1}
	enum {B=A?0:1}

This simple constant assignment does not work.
This snippet generate following error message.

	"non-constant expression 1 ? 0 : 1"

It obviously is constant expression, isn't it?

	enum {A=1}
	enum {B=A+1}

This works.

It looks that conditioanl expression never evaluated to constant value.

The same is true for "const" attribute.

	const int i = 1;
	const int j = i?0:1;

This code generates the same error message.

Yes, it should work. I'll add it to the bug list.