On Tue, 2010-08-31 at 17:06 +0300, Peter Bartlett wrote:
On the issue of a casting between signed and unsigned types (error 4244 in VC), I am a bit concerned I am missing something. Why is there significant discussion about choosing which cast to make the warning go away? I am labouring under the impression that boost::numeric_cast was invented to do those conversions?
numeric_cast will throw if the cast is not safe, and sometimes that is not what you want. There may be legacy design decisions involved which you may not be able to change, such as using negative numbers to indicate special conditions for a variable which is normally unsigned, and the special condition may not indicate an error, but a case you just have to handle separately. --> Mika Heiskanen