Re: [Boost-users] (no subject)

From: Jens Seidel (jensseidel_at_[hidden])
Date: 2008-03-22 07:40:32

On Sat, Mar 22, 2008 at 09:58:08AM -0000, John Maddock wrote:
> Actually I'm pretty annoyed that these warnings are generated by the 
> compiler at all: as far as I can see they can never represent a true 
> programming error - though I stand to be corrected on that one!
> 
> The warnings are raised when a class or structure does *not* have an 
> explicit copy-constructor or assignment operator declared, *and* one could 
> not be generated automatically by the compiler.  However, the warnings are 
> issued even though neither the copy-constructor nor the assignment operator 
> are ever used - if they were used then you would get a compiler error.
> 
> One possible fix is to declare but not define a private copy constructor and 
> assignment operator (rather like boost::noncopyable), but given that those 
> definitions are never used, this is just syntactic sugar to shut the 
> compiler up.  BTW if I remember correctly you get the same warnings if you 
> declare a class that inherits from noncopyable which rather destroys the 
> whole point of that one :-(
> 
> Tellingly, as far as I know VC++ is the only compiler to issue this warning.

How about writing a bug report for the compiler?

Jens