Why isn't == used to compare structs

[Don]

Trass3r wrote:
>> Why isn't == used to compare the struct members in the code above? I 
>> mean, if I compare the structs with == it could also use == to compare 
>> the members. If I use "is" to compare the structs it could use "is" to 
>> compare them members.
> 
> Structs are compared *bitwise*!

Not in D2, any more. If a member has an opEquals, it's compared using ==.