On Saturday, 10 October 2015 at 20:07:11 UTC, Jonathan M Davis
wrote:
On Saturday, October 10, 2015 15:20:02 tcak via
Digitalmars-d-learn wrote:
[code]
int[] list;
list = new int[0];
std.stdio.writeln("Is Null ? ", (list is null));
[/code]
Result is "Is Null? true".
Is this the correct behaviour? I would expect compiler to
point to an address in the heap, but set the length as 0. So,
it wouldn't return null, but the length would be 0 only.
It basically didn't bother to allocate an array on the heap,
because you asked for one with a length of zero.
Efficiency-wise, it makes no sense to allocate anything. You
wouldn't be doing anything with the memory anyway. The only way
that you're going to get an array of length 0 which doesn't
have a null ptr is to slice an array down to a length of 0.
- Jonathan M Davis
The situation is that the "length" parameter comes from user.
Also the item values come from user as well. I create the array
with "length" parameter. At another part of code, I check firstly
whether the array is created [code] if( array is null ) [/code],
then the items are checked for validation.
