Re: [boost] [boost::noncopyable] compiler warnings with the -Weffc++ flags

Subject: Re: [boost] [boost::noncopyable] compiler warnings with the -Weffc++ flags
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-06-11 18:08:23

AMDG

Anand Lakshminath wrote:
> Deriving from the boost::noncopyable class generates warnings when I
> compile with the -Weffc++ (effective C++) flags.
>
> There are two types of warnings:
>
> <snip>
> g++  -I/vobs/3rdparty/BOOST/boost_1_38_0/boost_inc -Weffc++ main.cpp
> main.cpp:10: warning: base class 'class
> boost::noncopyable_::noncopyable' has a non-virtual destructor
>   

If you're planning on using Boost at all, you should disable this warning.
Many Boost libraries use inheritance without virtual destructors heavily
and gcc doesn't make it easy to selectively disable spurious warnings.

> main.cpp:10: warning: 'class<unnamed>::DontTreadOnMe' has pointer data members
> main.cpp:10: warning:   but does not override
> '<unnamed>::DontTreadOnMe(const <unnamed>::DontTreadOnMe&)'
> main.cpp:10: warning:   or 'operator=(const <unnamed>::DontTreadOnMe&)'
>
> Is there a workaround and/or fix? I am using gcc 4.0.1.
>   

Um.  Don't use -Weffc++?  Seriously, the code is not broken and
there's nothing we can do to prevent these warnings.

In Christ,
Steven Watanabe