Re: [boost] operator bool() for smart pointers

From: Fernando Cacciola (fcacciola_at_[hidden])
Date: 2002-05-08 08:13:32

In addition to the safe bool included in the latest CVS version,
shared_ptr<> supports operator !.

Whenever a given class supports operator ! for boolan testing, you can
always use the 'double bang' idiom for testing 'true':

instead of: if (p) ...
write:  if ( !! p ) ...

Using this, of course, might be contrary to the user's religion :-)  since
it looks akward to the unaware eye; but it can be handy to know about it.

Fernando Cacciola
Sierra s.r.l.
fcacciola_at_[hidden]
www.gosierra.com