------- Comment #7 from jima at cadence dot com 2007-03-21 16:13 ------- (In reply to comment #6) > ... the proper way is to start a new object lifetime using placement new.
Are you referring only to internal operations in MyHeap::Malloc (in the demo program), or do you mean that the overall scheme can be re-coded somehow to use placement new without any casts? If the latter, I don't understand how that is possible, because the type of the object being allocated is not known -- the API of override operator new is (void *, size_t). Note that the interface we are trying to preserve (in use for many years) is that application programmers simply derive from a special base class when declaring their own classes, and then objects will use the special allocator. We can not require application coders to explicitly write placement-new (or call any kind of special allocator interface); that would be unworkable for human reasons, and also would prevent using generic template functions which must use ordinary "new" to allocate objects of template-parameter type. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31289
