Can somebody explain the need for
```d
private template isSame(alias a, alias b)
{
static if (!is(typeof(&a && &b)) // at least one is an rvalue
&& __traits(compiles, { enum isSame = a == b; })) //
c-t comparable
{
enum isSame = a == b;
}
else
{
enum isSame = __traits(isSame, a, b);
}
}
```
when there is already
```d
__traits(isSame, a, b)
```
?
Are there any cases where
```d
__traits(isSame, a, b)
```
doesn't have the same value as
```d
a == b
```
provided the static if expression above is true.
