On Saturday, 10 October 2015 at 15:20:04 UTC, tcak 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.
Yes, it's correct behaviour. `array is null` checks whether
array.ptr is null, which is the case for a 0-length array.
void main()
{
auto a = new int[0];
writeln(a.ptr); //a.ptr is null
auto a2 = new int[1];
writeln(a2.ptr); //a2.ptr is not null
a2 = a[0..$]; //Slice off the only element of a2
writeln(a2.ptr); //Now a2.ptr is null
}
