MSVC warnings compiling scoped_ptr and scoped_array

From: cop_at_[hidden]
Date: 2001-09-28 11:30:27

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. With default warning level /W3, there are no 
warnings. I'm sure the Boost library does not want to become bloated 
with fixes for compiler-specific warnings, but I like to compile with 
all my compiler's warnings enabled and some small fixes like these 
would make that easier. Admittedly, Microsoft's own header files do 
not pass MSVC's warning level /W4, but at least we can try. <:-)

Compiling...
foobar.cpp

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
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 
C4512: 'scoped_ptr<class foobar>' : assignment operator could not be 
generated
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(124) : warning 
C4511: 'scoped_array<class foobar>' : copy constructor could not be 
generated
d:\foobar.cpp(67) : see reference to class template 
instantiation 'boost::scoped_array<class foobar>' being compiled
d:\boost_1_24_0\boost\smart_ptr.hpp(124) : warning 
C4512: 'scoped_array<class foobar>' : assignment operator could not 
be generated
d:\foobar.cpp(67) : see reference to class template 
instantiation 'boost::scoped_array<class foobar>' being compiled

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:

private: // noncopyable
     scoped_ptr( const scoped_ptr& );
     const scoped_ptr& operator=( const scoped_ptr& );

private: // noncopyable
     scoped_array( const scoped_array& );
     const scoped_array& operator=( const scoped_array& );

thanks,
chris