- Simplify mechanism for detecting traits of test allocators. There were
some portability issues, but rather than fix them I've just gone for a
simpler mechanism. Does mean that the relevant tests can't be run for
other allocators.
- Fix a couple of unnecessary_copy_tests, whose results were the wrong
way round.
- It appears that Visual C++ only implements RVO for implicitly defined
copy constructors in debug mode, so adjust a move_test to account for
the extra copies now that the copy constructors are explicitly
defined.
[SVN r73798]
It's pretty messy because I'm trying to avoid swapping allocators in
these cases. I'm also not sure of the exception requirements of
allocator swap and assignment.
[SVN r73756]