Re: [boost] MSVC warnings compiling scoped_ptr and scoped_array

From: George A. Heintzelman (georgeh_at_[hidden])
Date: 2001-09-28 11:39:28

> When using boost::scoped_ptr or boost::scoped_array on MSVC 6.0 SP4 
> with warning level /W4, I get the following warnings about subclasses 
> of boost:noncopyable not defining (private) copy constructors and 
> assignment operator. 

[snip]

> d:\foobar.cpp(66) : see reference to class template 
> instantiation 'boost::scoped_ptr<class foobar>' being compiled
> d:\boost_1_24_0\boost\smart_ptr.hpp(96) : warning 
> C4511: 'scoped_ptr<class foobar>' : copy constructor could not be 
> generated

[snip]

> The fix for these warnings is simply to define a private copy 
> constructor and assignment operator for boost::scoped_ptr and 
> boost::scoped_array. For example:

Doesn't this 'fix' entirely defeat the purpose of boost::noncopyable, 
which is to avoid having to do this explicitly?

Seems to me that this warning is very unuseful, since it really is not 
a problem in a well-formed program unless, of course, that copy 
constructor or copy assignment is used somewhere, in which case *that* 
code should generate an error, not just a warning. I would recommend 
just turning this warning off, period.

George Heintzelman
georgeh_at_[hidden]