On Thursday, 1 September 2016 at 20:28:03 UTC, Rene Zwanenburg
wrote:
On Thursday, 1 September 2016 at 19:37:25 UTC, Yuxuan Shui
wrote:
[...]
This will allocate a closure. A struct definition inside a
function has a hidden context / closure pointer, unless it's a
static struct.
There is nothing like a ref variable in D. If you want to refer
to something someplace else, use a pointer. You can create a
pointer wrapper which acts like a reference (untested):
auto toRef(ref T value)
{
return Ref!T(&value);
}
struct Ref(T)
{
private T* value;
@property ref T _value() { return *value; }
alias _value this;
}
Note that D's pointer syntax is a bit friendlier than C++'s:
the dot operator works fine on pointers. A good reason to use
the Ref wrapper is to forward arithmetic operations to the
wrapped value.
I think my approach is probably better, because I believe
(correct me if I'm wrong): 1) it will never refer to a null
object. 2) after DIP1000 is implemented we will be able to make
sure there will be no dangling reference.
