On Friday, 4 December 2015 at 04:08:33 UTC, Tofu Ninja wrote:
On Thursday, 3 December 2015 at 21:04:00 UTC, Nordlöw wrote:
...
I think reflection will be a bad choice for this because of
private members and what not.
I think the correct way is:
void reset(C)(ref C c)
{
static if(is(C == class))
{
auto init = typeid(c).init();
auto objmem = ((cast(void*)c)[0 .. init.length]);
if(init.ptr == null) (cast(byte[])objmem)[] = 0;
else objmem[] = init[];
if(c.classinfo.defaultConstructor != null)
c.classinfo.defaultConstructor(c);
}
else c = C.init;
}
Seems to work for structs, classes, and basic types. It even
calls the default constructor for classes, even if there is
inheritance and the object passed in is not actually C but a
sub class of C.
Oh after reading chris's post, probably should change to...
void reset(C)(ref C c)
{
static if(is(C == class))
{
auto type_info = typeid(c);
auto class_info = c.classinfo;
destroy(c);
auto init = type_info.init();
auto objmem = ((cast(void*)c)[0 .. init.length]);
if(init.ptr == null) (cast(byte[])objmem)[] = 0;
else objmem[] = init[];
if(class_info.defaultConstructor != null)
class_info.defaultConstructor(c);
else throw new Exception("No default constructor");
}
else c = C.init;
}
