On Friday, 13 June 2014 at 15:05:49 UTC, Tom Browder via
Digitalmars-d-learn wrote:
So I'm not sure how to translate that into D. I do know my
first
attempt here doesn't work, even with it being surrounded by
extern (C)
{}:
$ cat chdr.d
struct t;
struct t* t_ptr = null;
This seems to work fine for me. What's the problem?
Note this isn't *strictly* the same as what you have in C, as
"null" is not strongly bindded to a single type. If you want a
null pointer which is pre-emptivelly strongly, then you can use
an eponymous template:
enum nullptr(T) = (T*).init;
auto p = nullptr!t;
Throw in an alias, and you got it working exactly like an C:
enum nullptr(T) = (T*).init;
alias t_nullptr = nullptr!t;
struct t* t_ptr = t_nullptr;
That said, I'd advise against this. Just use "null" and move on.
It's idiomatic.
