On Saturday, 25 April 2015 at 19:14:41 UTC, weaselcat wrote:
On Saturday, 25 April 2015 at 19:09:15 UTC, Namespace wrote:
On Saturday, 25 April 2015 at 18:57:13 UTC, Adam D. Ruppe
wrote:
On Saturday, 25 April 2015 at 18:50:59 UTC, Namespace wrote:
Nice name, fits better. But that should be in phobos, don't
you think?
meh, it might be nice to have, but not being in phobos isn't
a big deal to me for little utilities like this
I'm sure newcomers (especially those coming from C++) would be
delighted if they had the possibility to reuse their memory.
In addition, it could be impossible for them to write such
"hack" itself.
I already hear the cries: "D wasted memory" and: "I can not
reuse my memory".
And then it would be less attractive for such people, to
switch to D.
I would suggest something like:
----
T emplace(T, U...)(ref T obj, auto ref U args) if (is(T ==
class)) {
if (!obj)
return null;
import std.conv : emplace; // temporary, as long it is not
in std.conv
enum ClassSizeOf = __traits(classInstanceSize, T);
void[] buf = (cast(void*) obj)[0 .. ClassSizeOf];
return emplace!(T)(buf, args);
}
T emplaceOrNew(T, U...)(ref T obj, auto ref U args) if (is(T
== class)) {
if (!obj)
return new T(args);
return emplace(obj, args);
}
----
hmm...
http://dlang.org/phobos/std_conv.html#.emplace
woops, accidentally posted before finishing
I was going to say that this should probably just be an overload
of emplace if it isn't already, seems odd if it isn't.
