John Maddock skrev:
In case your are wondering, then I need this functionality in boost::auto_buffer to get rid of the extra word when the stack-buffer is empty (thus making auto_buffer as small as vector).
Comments?
I haven't looked into this in detail, but what happens on compilers that don't support the EBO?
Nothing AFAICT. All current uses of aligned_storage has an internal buffer of size at least 1. Having a private data member or inherting privately from a non-empty class should give the same results. For compilers that don't support EBO, the size of an empty aligned_storage will be > 0, but this is also the case when we have an emty data member (at least with gcc). However void* address() const { return this; } probably needs to be modified to return the address of the private base class instead. -Thorsten