Re: [boost] How to create a shallow copy without calling aconstructor?

4 Jan 2010

      Am Saturday 02 January 2010 23:34:51 schrieb vicente.botet:
...
Derived* p = reinterpret_cast<Derived*>( new char[sizeof(Derived)]);
      std::memcpy(p, static_cast<Derived const*>(this), sizeof(Derived));
      return p;
    }
quick question about this, is it legal to do the following?

T *t=reinterpret_cast<T *>(new char[sizeof(T)]);
new (&t) T;
delete T;

Boost.Serialization must use that, as it passes unconstructed memory to 
load_construct_data but lets the user "delete" the object, so I figure it 
must be ok. am I right?

my platform (with valgrind) doesn't have a problem with it, but is it defined 
to be ok or portable among all known platforms?

Re: [boost] How to create a shallow copy without calling aconstructor?

Stefan Strasser