Re: [boost] safe bool not safe enough ?

Subject: Re: [boost] safe bool not safe enough ?
From: John Maddock (boost.regex_at_[hidden])
Date: 2013-03-14 14:30:14

> bool do_something_with_a_Testable()
> {
>  Testable t;
>  [...]
>  // return t; doesn't work
>  return !!t;
> }

That's the whole point: the convertion is explicit so you can't "return t" 
and expect an implicit conversion, you need a static_cast if that's what you 
*really* want to do:

bool do_something_with_a_Testable()
{
  Testable t;
  [...]
  return static_cast<bool>(t);
}

Which IMO much better expresses what you're trying to do anyway, John.