div0 wrote:
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Pillsy wrote:
Hi, all,
I was wondering if there's any way to determine at compile time
whether a struct has a (non-trivial) destructor associated with it,
and whether there's any way to call that destructor without using
the delete operator. It seems like being able to do these two
things would allow you to make a container that plays well with
structs that are designed to do (say) reference counting, but I
don't see anything in the spec on the website that shows how this
might be accomplished.
Thanks!
Pillsy
Struct and class destructors are called __dtor.
This is undocumented though and therefore not guaranteed to work in
future versions or other(!) implementations:
struct foo {
~this()
{
}
}
int main(){
foo b;
static if(__traits(compiles, b.__dtor()))
{
pragma (msg, "got destructor");
}
else
{
pragma (msg, "no destructor");
}
return 0;
}
There are various struct destructor bugs still open though, so I
wouldn't count on being able to do a ref counted objects at the moment:
Most important is this one, which scuppers any change of doing a shared
ptr like struct:
http://d.puremagic.com/issues/show_bug.cgi?id=3516
Yup, that's #3 on my list of Ten Must-fix Bugs.
This related one is pretty bad too.
> http://d.puremagic.com/issues/show_bug.cgi?id=3323
- --
My enormous talent is exceeded only by my outrageous laziness.
http://www.ssTk.co.uk
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