Struct with default ctor (Was: [dmd-beta] dmd 2.064 beta take 2)

[Walter Bright]

On 5/19/2013 5:02 AM, Simen Kjaeraas wrote:
>> By definition? Pointer semantics are what we choose it to mean.
> Of course. But which definition is saner:

For many types, it is extremely useful to have some sort of "invalid" value for 
it. null fills that role nicely for pointers, just as nan does for floating 
point types, and 0xFF does for UTF-8.

There's not anything insane about it. The Nullable type constructor even exists 
in order to provide such an invalid state for types (like int) which normally do 
not have one.

Yes, I do understand there's a role for pointers which cannot hold the invalid 
value.