Re: [boost] BOOST_EXPLICIT_OPERATOR_BOOL macro?

Andrey Semashev wrote:

I think such a tool would be useful. But I found it more convenient to express explicit operator bool through operator!. This allows the check to be arbitrarily complex, and the approach adds to compatibility with some compilers. See here:

<http://boost-log.svn.sourceforge.net/viewvc/boost-log/trunk/boost-log/boost/log/detail/unspecified_bool.hpp?revision=432&view=markup>

Can you explain why the dummy struct has *two* data members? Is it because some compilers interpret a pointer-to-member-object to the first data member of a class as convertible to false? Thanks, - Jeff