2010-06-06 Jonathan Wakely <jwakely.gcc@gmail.com>
PR libstdc++/40296
* libsupc++/exception_ptr.h (exception_ptr::exception_ptr): Replace
__safe_bool constructor with nullptr_t constructor in C++0x mode.
(exception_ptr::operator bool): Add explicit conversion to bool.
(swap(exception_ptr&, exception_ptr&)): Add.
(exception_ptr::_M_safe_bool_dummy): Only declare for old ABI.
* libsupc++/eh_ptr.cc (exception_ptr::_M_safe_bool_dummy): Move
next to other functions retained for ABI compatibility.
* testsuite/18_support/exception_ptr/requirements.cc: New.
* testsuite/18_support/exception_ptr/requirements_neg.cc: New.
From-SVN: r160340
