Consider the following code:

enum MyEnum
{
	val1,
	val2 // comment
};

class MyClass
{
public:
	void doSomething(MyEnum) {}
};

int main()
{
	MyClass myclass // comment
			;
	myclass.doSomething(val2);
	return 0;
}

Place the caret on any of the comments, the object/value that appears last in the line is highlighted (see screenshot).

This only happens when there is no separator (',', ';') between the symbol and the comment.