Re: [boost] aligned_storage in unions

AMDG dherring@ll.mit.edu wrote:

While C++0x promises to change things (see draft spec section 9.5), C++ currently does not allow unions to contain members having a nontrivial constructor, operator=, or destructor. This excludes std::string, std::complex, structures containing either, etc.

The "standard" workaround is to allocate your own memory and use manual type casting. Boost::aligned_storage can be used to maintain proper alignment, but it cannot be placed inside a union due to the default ctor, dtor, and noncopyable functions. Thus I am forced to use part of boost::detail.

Use boost::aligned_storage<...>::type which should be POD. In Christ, Steven Watanabe