On 06/05/2014 03:47 PM, Chris Williams wrote:
On Thursday, 5 June 2014 at 22:25:03 UTC, Adam D. Ruppe wrote:
On Thursday, 5 June 2014 at 22:22:16 UTC, Chris Williams wrote:
If I wanted to allocate memory for a class and then call its
constructor as two separate steps, while still having the object be
managed by the garbage collector, is there any way to do that?
Check out std.conv.emplace
http://dlang.org/phobos/std_conv.html#emplace
First, allocate the memory block for the class. The size is
__traits(classInstanceSize, Yourclass). Then slice it:
enum size = __traits(classInstanceSize, YourClass);
auto memory = GC.malloc(size)[0 .. size];
Why slice? There seems to be a version of emplace that accepts a
pointer, which is what GC.malloc() seems to return.
That overload returns a T* but we need a class variable. I think we
should accept it that it is reserved for non-class types (as the
documentation also indicates).
Ali
