From: Reece Dunn (msclrhd_at_[hidden])
Date: 2003-12-05 20:09:05
Paul A. Bristow wrote:
>5 There are a handful of warning that an assignment operator could not be
>generated. The MS advice on this is:
>"To avoid this warning, specify a user-defined assignment operator for the
>class.
>[omitted for brevity]
>You can resolve the C4512 warning for this code in one of three ways:
>Explicitly define an assignment operator for the class.
>Remove const from the data item in the class.
>Use the #pragma warning statement. "
>I chose the latter easy option.
># pragma warning(disable: 4512) // assignment operator could not be
>generated
>Gurus views on this?
I am not a Guru, but I have had experience in this area. I have found that
the following will, more often than not, solve the problem:
class base: public boost::noncopyable
{
// ...
};
>Is there a Boost 'Standard' way to do document unhelpful warnings like
>this?
How about something along the lines of:
#include <boost/warn/push.hpp> // disable common warnings
// code generating warnings goes here
#include <boost/warn/pop.hpp> // revert to previous warning configuration
The compiler detection can then be placed in those files, without header
guards to allow them to be reused, e.g.:
// push.hpp
#if _MSC_VER
# pragma warning( push )
# pragma warning( disable : 4290 ) // C++ exception specification ignored
except to indicate a function is not __declspec(nothrow)
# pragma warning( disable : 4512 ) // assignment operator could not be
generated
// ...
#else
// other compilers
#endif
// pop.hpp
#if _MSC_VER
# pragma warning( pop )
#else
// ...
#endif
Regards,
Reece
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